Breast Cancer Research Poised to Change Practice From ASCO25

Dr. Diwakar Davar and Dr. Jason Luke discuss novel agents in melanoma and other promising new data in the field of immunotherapy that were presented at the 2025 ASCO Annual Meeting. TRANSCRIPT Dr. Diwakar Davar: Hello. My name is Diwakar Davar, and I am welcoming you to the ASCO Daily News Podcast. I'm an associate professor of medicine and the clinical director of the Melanoma and Skin Cancer Program at the University of Pittsburgh’s Hillman Cancer Center. Today, I'm joined by my colleague and good friend, Dr. Jason Luke. Dr. Luke is a professor of medicine. He is also the associate director of clinical research and the director of the Phase 1 IDDC Program at the University of Pittsburgh's Hillman Cancer Center. He and I are going to be discussing some key advancements in melanoma and skin cancers that were presented at the 2025 ASCO Annual Meeting. Our full disclosures are available in the transcript of this episode.  Jason, it is great to have you back on the podcast. Dr. Jason Luke: Thanks again so much for the opportunity, and I'm really looking forward to it. Dr. Diwakar Davar: Perfect. So we will go ahead and start talking a little bit about a couple of key abstracts in both the drug development immunotherapy space and the melanoma space. The first couple of abstracts, the first two, will cover melanoma. So, the first is LBA9500, which was essentially the primary results of RELATIVITY-098. RELATIVITY-098 was a phase 3 trial that compared nivolumab plus relatlimab in a fixed-dose combination against nivolumab alone for the adjuvant treatment of resected high-risk disease. Jason, do you want to maybe give us a brief context of what this is? Dr. Jason Luke: Yeah, it's great, thanks. So as almost all listeners, of course, will be aware, the use of anti–PD-1 immunotherapies really revolutionized melanoma oncology over the last 10 to 15 years. And it has become a standard of care in the adjuvant setting as well. But to review, in patients with stage III melanoma, treatment can be targeted towards BRAF with BRAF and MEK combination therapy, where that's relevant, or anti–PD-1 with nivolumab or pembrolizumab are a standard of care. And more recently, we've had the development of neoadjuvant approaches for palpable stage III disease. And in that space, if patients present, based on two different studies, either pembrolizumab or nivolumab plus ipilimumab can be given prior to surgery for somewhere in the 6- to 9-week range. And so all of these therapies have improved time-to-event endpoints, such as relapse-free or event-free survival. It's worth noting, however, that despite those advances, we've had a couple different trials now that have actually failed in this adjuvant setting, most high profile being the CheckMate-915 study, which looked at nivolumab plus ipilimumab and unfortunately was a negative study. So, with RELATIVITY-047, which was the trial of nivolumab plus relatlimab that showed an improvement in progression-free survival for metastatic disease, there's a lot of interest, and we've been awaiting these data for a long time for RELATIVITY-098, which, of course, is this adjuvant trial of LAG-3 blockade with relatlimab plus nivolumab. Dr. Diwakar Davar: Great. So with that, let's briefly discuss the trial design and the results. So this was a randomized, phase 3, blinded study, so double-blinded, so neither the investigators knew what the patients were getting, nor did the patients know what they were getting. The treatment investigational arm was nivolumab plus relatlimab in the fixed-dose combination. So that's the nivolumab standard fixed dose with relatlimab that was FDA approved in RELATIVITY-047. And the control arm was nivolumab by itself. The duration of treatment was 1 year. The patient population consisted of resected high-risk stage III or IV patients. The primary endpoint was investigator-assessed RFS. Stage and geography were the standard stratifying factors, and they were included, and most of the criteria were balanced across both arms. What we know at this point is that the 2-year RFS rate was 64% and 62% in the nivolumab and nivolumab-combination arms, respectively. The 2-year DMFS rate was similarly equivalent: 76% with nivolumab monotherapy, 73% with the combination. And similar to what you had talked about with CheckMate 915, unfortunately, the addition of LAG-3 did not appear to improve the RFS or DMFS compared to control in this patient population. So, tell us a little bit about your take on this and what do you think might be the reasons why this trial was negative? Dr. Jason Luke: It's really unfortunate that we have this negative phase 3 trial. There had been a lot of hope that the combination of nivolumab with relatlimab would be a better tolerated combination that increased the efficacy. So in the metastatic setting, we do have 047, the study that demonstrated nivolumab plus relatlimab, but now we have this negative trial in the adjuvant setting. And so as to why exactly, I think is a complicated scenario. You know, when we look at the hazard ratios for relapse-free survival, the primary endpoint, as well as the secondary endpoints for distant metastasis-free survival, we see that the hazard ratio is approximately 1. So there's basically no difference. And that really suggests that relatlimab in this setting had no impact whatsoever on therapeutic outcomes in terms of efficacy. Now, it's worth noting that there was a biomarker subanalysis that was presented in conjunction with these data that looked at some immunophenotyping, both from circulating T cells, CD8 T cells, as well as from the tumor microenvironment from patients who were treated, both in the previous metastatic trial, the RELATIVITY-047 study, and now in this adjuvant study in the RELATIVITY-098 study. And to briefly summarize those, what was identified was that T cells in advanced melanoma seemed to have higher expression levels of LAG-3 relative to T cells that are circulating in patients that are in the adjuvant setting. In addition to that, there was a suggestion that the magnitude of increase is greater in the advanced setting versus adjuvant. And the overall summary of this is that the suggested rationale for why this was a negative trial may have been that the target of LAG-3 is not expressed as highly in the adjuvant setting as it is in the metastatic setting. And so while the data that were presented, I think, support this kind of an idea, I am a little bit cautious that this is actually the reason for why the trial was negative, however. I would say we're not really sure yet as to why the trial was negative, but the fact that the hazard ratios for the major endpoints were essentially 1 suggests that there was no impact whatsoever from relatlimab. And this really makes one wonder whether or not building on anti–PD-1 in the adjuvant setting is feasible because anti–PD-1 works so well. You would think that even if the levels of LAG-3 expression were slightly different, you would have seen a trend in one direction or another by adding a second drug, relatlimab, in this scenario. So overall, I think it's an unfortunate circumstance that the trial is negative. Clearly there's going to be no role for relatlimab in the adjuvant setting. I think this really makes one wonder about the utility of LAG-3 blockade and how powerful it really can be. I think it's probably worth pointing out there's another adjuvant trial ongoing now of a different PD-1 and LAG-3 combination, and that's cemiplimab plus fianlimab, a LAG-3 antibody that's being dosed from another trial sponsor at a much higher dose, and perhaps that may make some level of difference. But certainly, these are unfortunate results that will not advance the field beyond where we were at already. Dr. Diwakar Davar: And to your point about third-generation checkpoint factors that were negative, I guess it's probably worth noting that a trial that you were involved with, KeyVibe-010, that evaluated the PD-1 TIGIT co-formulation of vibostolimab, MK-4280A, was also, unfortunately, similarly negative. So, to your point, it's not clear that all these third-generation receptors are necessarily going to have the same impact in the adjuvant setting, even if they, you know, for example, like TIGIT, and they sometimes may not even have an effect at all in the advanced cancer setting. So, we'll see what the HARMONY phase 3 trial, that's the Regeneron cemiplimab/fianlimab versus pembrolizumab control with cemiplimab with fianlimab at two different doses, we'll see how that reads out. But certainly, as you've said, LAG-3 does not, unfortunately, appear to have an impact in the adjuvant setting. So let's move on to LBA9501. This is the primary analysis of EORTC-2139-MG or the Columbus-AD trial. This was a randomized trial of encorafenib and binimetinib, which we will abbreviate as enco-bini going forward, compared to placebo in high-risk stage II setting in melanoma in patients with BRAF V600E or K mutant disease. So Jason, you know, you happen to know one or two things about the resected stage II setting, so maybe contextualize the stage II setting for us based on the trials that you've led, KEYNOTE-716, as well as CheckMate-76K, set us up to talk about Columbus-AD. Dr. Jason Luke: Thanks for that introduction, and certainly stage II disease has been something I've worked a lot on. The rationale for that has been that building off of the activity of anti–PD-1 in metastatic melanoma and then seeing the activity in stage III, like we just talked about, it was a curious circumstance that dating back about 7 to 8 years ago, there was no availability to use anti–PD-1 for high-risk stage II patients, even though the risk of recurrence and death from melanoma in the context of stage IIB and IIC melanoma is in fact similar or actually higher than in stage IIIA or IIIB, where anti–PD-1 was approved. And in that context, a couple of different trials that you alluded to, the Keynote-716 study that I led, as well as the CheckMate 76K trial, evaluated pembrolizumab and nivolumab, respectively, showing an improvement in relapse-free and distant metastasis-free survival, and both of those agents have subsequently been approved for use in the adjuvant setting by the US FDA as well as the European Medicines Agency.  So bringing then to this abstract, throughout melanoma oncology, we've seen that the impact of anti–PD-1 immunotherapy versus BRAF and MEK-targeted therapy have had very similar outcomes on a sort of comparison basis, both in frontline metastatic and then in adjuvant setting. So it was a totally reasonable question to ask: Could we use adjuvant BRAF and MEK inhibitor therapy? And I think all of us expected the answer would be yes. As we get into the discussion of the trial, I think the unfortunate circumstance was that the timing of this clinical trial being delayed somewhat, unfortunately, made it very difficult to accrue the trial, and so we're going to have to try to read through the tea leaves sort of, based on only a partially complete data set. Dr. Diwakar Davar: So, in terms of the results, they wanted to enroll 815 patients, they only enrolled 110. The RFS and DMFS were marginally improved in the treatment arm but certainly not significantly, which is not surprising because the trial had only accrued 16% to 18% of its complete accrual. As such, we really can't abstract from the stage III COMBI-AD data to stage II patients. And certainly in this setting, one would argue that the primary treatment options certainly remain either anti–PD-1 monotherapy, either with pembrolizumab or nivolumab, based on 716 or 76K, or potentially active surveillance for the patients who are not inclined to get treated.  Can you tell us a little bit about how you foresee drug development going forward in this space because, you know, for example, with HARMONY, certainly IIC disease is a part of HARMONY. We will know at least a little bit about that in this space. So what do you think about the stage IIB/C patient population? Is this a patient population in which future combinations are going to be helpful, and how would you think about where we can go forward from here? Dr. Jason Luke: It is an unfortunate circumstance that this trial could not be accrued at the pace that was necessary. I think all of us believe that the results would have been positive if they'd been able to accrue the trial. In the preliminary data set that they did disclose of that 110 patients, you know, it's clear there is a difference at a, you know, a landmark at a year. They showed a 16% difference, and that would be in line with what has been seen in stage III. And so, you know, I think it's really kind of too bad. There's really going to be no regulatory approach for this consideration. So using BRAF and MEK inhibition in stage II is not going to be part of standard practice moving into the future. To your point, though, about where will the field go? I think what we're already realizing is that in the adjuvant setting, we're really overtreating the total population. And so beyond merely staging by AJCC criteria, we need to move to biomarker selection to help inform which patients truly need the treatment. And in that regard, I don't think we've crystallized together as a field as yet, but the kinds of things that people are thinking about are the integration of molecular biomarkers like ctDNA. When it's positive, it can be very helpful, but in melanoma, we found that, unfortunately, the rates are quite low, you know, in the 10% to 15% range in the adjuvant setting. So then another consideration would be factors in the primary tumor, such as gene expression profiling or other considerations.  And so I think the future of adjuvant clinical trials will be an integration of both the standard AJCC staging system as well as some kind of overlaid molecular biomarker that helps to enrich for a higher-risk population of patients because on a high level, when you abstract out, it's just clearly the case that we're rather substantially overtreating the totality of the population, especially given that in all of our adjuvant studies to date for anti–PD-1, we have not yet shown that there's an overall survival advantage. And so some are even arguing perhaps we should even reserve treatment until patients progress. I think that's a complicated subject, and standard of care at this point is to offer adjuvant therapy, but certainly a lot more to do because many patients, you know, unfortunately, still do progress and move on to metastatic disease. Dr. Diwakar Davar: Let's transition to Abstract 2508. So we're moving on from the melanoma to the novel immunotherapy abstracts. And this is a very, very, very fascinating drug. It's IMA203. So Abstract 2508 is a phase 1 clinical update of IMA203. IMA203 is an autologous TCR-T construct targeting PRAME in patients with heavily pretreated PD-1-refractory metastatic melanoma. So Jason, in the PD-1 and CTLA-4-refractory settings, treatment options are either autologous TIL, response rate, you know, ballpark 29% to 31%, oncolytic viral therapy, RP1 with nivolumab, ORR about 30-ish percent. So new options are needed. Can you tell us a little bit about IMA203? Perhaps tell us for the audience, what is the difference between a TCR-T and traditional autologous TIL? And a little bit about this drug, IMA203, and how it distinguishes itself from the competing TIL products in the landscape. Dr. Jason Luke: I'm extremely enthusiastic about IMA203. I think that it really has transformative potential based on these results and hopefully from the phase 3 trial that's open to accrual now. So, what is IMA203? We said it's a TCR-T cell product. So what that means is that T cells are removed from a patient, and then they can be transduced through various technologies, but inserted into those T cells, we can then add a T-cell receptor that's very specific to a single antigen, and in this case, it's PRAME. So that then is contrasted quite a bit from the TIL process, which includes a surgical resection of a tumor where T cells are removed, but they're not specific necessarily to the cancer, and they're grown up in the lab and then given to the patient. They're both adoptive cell transfer products, but they're very different. One is genetically modified, and the other one is not. And so the process for generating a TCR-T cell is that patients are required to have a new biomarker that some may not be familiar with, which is HLA profiling. So the T-cell receptor requires matching to the concomitant HLA for which the peptide is bound in. And so the classic one that is used in most oncology practices is A*02:01 because approximately 48% of Caucasians have A*02:01, and the frequency of HLA in other ethnicities starts to become highly variable. But in patients who are identified to have A*02:01 genotype, we can then remove blood via leukapheresis or an apheresis product, and then insert via lentiviral transduction this T-cell receptor targeting PRAME. Patients are then brought back to the hospital where they can receive lymphodepleting chemotherapy and then receive the reinfusion of the TCR-T cells. Again, in contrast with the TIL process, however, these T cells are extremely potent, and we do not need to give high-dose interleukin-2, which is administered in the context of TIL. Given that process, we have this clinical trial in front of us now, and at ASCO, the update was from the phase 1 study, which was looking at IMA203 in an efficacy population of melanoma patients who were refractory at checkpoint blockade and actually multiple lines of therapy. So here, there were 33 patients and a response rate of approximately 50% was observed in this population of patients, notably with a duration of response approximately a year in that treatment group. And I realize that these were heavily pretreated patients who had a range of very high-risk features. And approximately half the population had uveal melanoma, which people may be aware is a generally speaking more difficult-to-treat subtype of melanoma that metastasizes to the liver, which again has been a site of resistance to cancer immunotherapy. So these results are extremely promising. To summarize them from what I said, it's easier to make TCR-T cells because we can remove blood from the patient to transduce the T cells, and we don't have to put them through surgery. We can then infuse them, and based on these results, it looks like the response rate to IMA203 is a little bit more than double what we expect from lifileucel. And then, whereas with lifileucel or TILs, we have to give high-dose IL-2, here we do not have to give high-dose IL-2. And so that's pretty promising. And a clinical trial is ongoing now called the SUPREME phase 3 clinical trial, which is hoping to validate these results in a randomized global study. Dr. Diwakar Davar: Now, one thing that I wanted to go over with you, because you know this trial particularly well, is what you think of the likelihood of success, and then we'll talk a little bit about the trial design. But in your mind, do you think that this is a trial that has got a reasonable likelihood of success, maybe even a high likelihood of success? And maybe let's contextualize that to say an alternative trial, such as, for example, the TebeAM trial, which is essentially a T-cell bispecific targeting GP100. It's being compared against SOC, investigator's choice control, also in a similarly heavily pretreated patient population. Dr. Jason Luke: So both trials, I think, have a strong chance of success. They are very different kinds of agents. And so the CD3 bispecific that you referred to, tebentafusp, likely has an effect of delaying progression, which in patients with advanced disease could have a value that might manifest as overall survival. With TCR-T cells, by contrast, we see a very high response rate with some of the patients going into very durable long-term benefit. And so I do think that the SUPREME clinical trial has a very high chance of success. It will be the first clinical trial in solid tumor oncology randomizing patients to receive a cell therapy as compared with a standard of care. And within that standard of care control arm, TILs are allowed as a treatment. And so it will also be the first study that will compare TCR-T cells against TILs in a randomized phase 3. But going back to the data that we've seen in the phase 1 trial, what we observe is that the duration of response is really connected to the quality of the response, meaning if you have more than a 50% tumor shrinkage, those patients do very, very well. But even in patients who have less than 50% tumor shrinkage, the median progression-free survival right now is about 4.5 months. And again, as we think about trial design, standard of care options for patients who are in this situation are unfortunately very bad. And the progression-free survival in that population is probably more like 2 months. So this is a trial that has a very high likelihood of being positive because the possibility of long-term response is there, but even for patients who don't get a durable response, they're likely going to benefit more than they would have based on standard chemotherapy or retreatment with an anti–PD-1 agent. Dr. Diwakar Davar: Really, a very important trial to enroll, a trial that is first in many ways. First of a new generation of TCR-T agents, first trial to look at cell therapy in the control arm, a new standard of efficacy, but potentially also if this trial is successful, it will also be a new standard of trial conduct, a new kind of trial, of a set of trials that will be done in the second-line immunotherapy-refractory space. So let's pivot to the last trial that we were going to discuss, which was Abstract 2501. Abstract 2501 is a first-in-human phase 1/2 trial evaluating BNT142, which is the first-in-class mRNA-encoded bispecific targeting Claudin-6 and CD3 in patients with Claudin-positive tumors. We'll talk a little bit about this, but maybe let's start by talking a little bit about Claudin-6. So Claudin-6 is a very interesting new target. It's a target that's highly expressed in GI and ovarian tumors. There are a whole plethora of Claudin-6-targeting agents, including T-cell bispecifics and Claudin-6-directed CAR-Ts that are being developed. But BNT142 is novel. It's a novel lipid nanoparticle LNP-encapsulated mRNA. The mRNA encodes an anti–Claudin-6 CD3 bispecific termed RiboMAB-021. And it then is administered to the patient. The BNT142-encoding mRNA LNPs are taken up by the liver and translated into the active drug. So Jason, tell us a little bit about this agent. Why you think it's novel, if you think it's novel, and let's talk a little bit then about the results. Dr. Jason Luke: So I certainly think this is a novel agent, and I think this is just the first of what will probably become a new paradigm in oncology drug development. And so you alluded to this, but just to rehash it quickly, the drug is encoded as genetic information that's placed in the lipid nanoparticle and then is infused into the patient. And after the lipid nanoparticles are taken up by the liver, which is the most common place that LNPs are usually taken up, that genetic material in the mRNA starts to be translated into the actual protein, and that protein is the drug. So this is in vivo generation, so the patient is making their own drug inside their body. I think it's a really, really interesting approach. So for any drug that could be encoded as a genetic sequence, and in this case, it's a bispecific, as you mentioned, CD3-Claudin-6 engager, this could have a tremendous impact on how we think about pharmacology and novel drug development moving into the future in oncology. So I think it's an extremely interesting drug, the like of which we'll probably see only more moving forward. Dr. Diwakar Davar: Let's maybe briefly talk about the results. You know, the patient population was heavily pretreated, 65 or so patients, mostly ovarian cancer. Two-thirds of the patients were ovarian cancer, the rest were germ cell and lung cancer patients. But let's talk a little bit about the efficacy. The disease control rate was about 58% in the phase 1 population as a whole, but 75% in the ovarian patient population. Now tell us a little bit about the interesting things about the drug in terms of the pharmacokinetics, and also then maybe we can pivot to the clinical activity by dose level. Dr. Jason Luke: Well, so they did present in their presentation at ASCO a proportionality showing that as higher doses were administered, that greater amounts of the drug were being made inside the patient. And so that's an interesting observation, and it's an important one, right? Suggesting that the pharmacology that we classically think of by administering drugs by IV, for example, would still be in play. And that did translate into some level of efficacy, particularly at the higher dose levels. Now, the caveat that I'll make a note of is that disease control rate is an endpoint that I think we have to be careful about because what that really means is sometimes a little bit unclear. Sometimes patients have slowly growing tumors and so on and so forth. And the clinical relevance of disease control, if it doesn't last at least 6 months, I think is probably pretty questionable. So I think these are extremely interesting data, and there's some preliminary sense that getting the dose up is going to matter because the treatment responses were mostly observed at the highest dose levels. There's also a caveat, however, that across the field of CD3 bispecific molecules like this, there's been quite a bit of heterogeneity in terms of the response rate, with some of them only really generating stable disease responses and other ones having more robust responses. And so I think this is a really interesting initial foray into this space. My best understanding is this molecule is not moving forward further after this, but I think that this really does set it up to be able to chase after multiple different drug targets on a CD3 bispecific backbone, both in ovarian cancer, but then basically across all of oncology. Dr. Diwakar Davar: Perfect. This is a very new sort of exciting arena where we're going to be looking at, in many ways, these programmable constructs, whether we're looking at in vivo-generated, in this case, a T-cell bispecific, but we've also got newer drugs where we are essentially giving drugs where people are generating in vivo CAR T, and also potentially even in vivo TCR-T. But certainly lots of new excitement around this entire class of drugs. And so, what we'd like to do at this point in time is switch to essentially the fact that we've got a very, very exciting set of data at ASCO 2025. You've heard from Dr. Luke regarding the advances in both early drug development but also in advanced cutaneous melanoma. And Jason, as always, thank you so much for sharing your very valuable and great, fantastic insights with us on the ASCO Daily News Podcast. Dr. Jason Luke: Well, thanks again for the opportunity. Dr. Diwakar Davar: And thank you to our listeners for taking your time to listen today. You will find the links to the abstracts that we discussed today in the transcript of this episode. And finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Follow today’s speakers:    Dr. Diwakar Davar    @diwakardavar    Dr. Jason Luke @jasonlukemd Follow ASCO on social media:     @ASCO on Twitter       ASCO on Bluesky   ASCO on Facebook       ASCO on LinkedIn   Disclosures:     Dr. Diwakar Davar:      Honoraria: Merck, Tesaro, Array BioPharma, Immunocore, Instil Bio, Vedanta Biosciences     Consulting or Advisory Role: Instil Bio, Vedanta Biosciences     Consulting or Advisory Role (Immediate family member): Shionogi     Research Funding: Merck, Checkmate Pharmaceuticals, CellSight Technologies, GSK, Merck, Arvus Biosciences, Arcus Biosciences     Research Funding (Inst.): Zucero Therapeutics     Patents, Royalties, Other Intellectual Property: Application No.: 63/124,231 Title: COMPOSITIONS AND METHODS FOR TREATING CANCER Applicant: University of Pittsburgh–Of the Commonwealth System of Higher Education Inventors: Diwakar Davar Filing Date: December 11, 2020 Country: United States MCC Reference: 10504-059PV1 Your Reference: 05545; and Application No.: 63/208,719 Enteric Microbiotype Signatures of Immune-related Adverse Events and Response in Relation to Anti-PD-1 Immunotherapy     Dr. Jason Luke:     Stock and Other Ownership Interests: Actym Therapeutics, Mavu Pharmaceutical, Pyxis, Alphamab Oncology, Tempest Therapeutics, Kanaph Therapeutics, Onc.AI, Arch Oncology, Stipe, NeoTX     Consulting or Advisory Role: Bristol-Myers Squibb, Merck, EMD Serono, Novartis, 7 Hills Pharma, Janssen, Reflexion Medical, Tempest Therapeutics, Alphamab Oncology, Spring Bank, Abbvie, Astellas Pharma, Bayer, Incyte, Mersana, Partner Therapeutics, Synlogic, Eisai, Werewolf, Ribon Therapeutics, Checkmate Pharmaceuticals, CStone Pharmaceuticals, Nektar, Regeneron, Rubius, Tesaro, Xilio, Xencor, Alnylam, Crown Bioscience, Flame Biosciences, Genentech, Kadmon, KSQ Therapeutics, Immunocore, Inzen, Pfizer, Silicon Therapeutics, TRex Bio, Bright Peak, Onc.AI, STipe, Codiak Biosciences, Day One Therapeutics, Endeavor, Gilead Sciences, Hotspot Therapeutics, SERVIER, STINGthera, Synthekine     Research Funding (Inst.): Merck , Bristol-Myers Squibb, Incyte, Corvus Pharmaceuticals, Abbvie, Macrogenics, Xencor, Array BioPharma, Agios, Astellas Pharma , EMD Serono, Immatics, Kadmon, Moderna Therapeutics, Nektar, Spring bank, Trishula, KAHR Medical, Fstar, Genmab, Ikena Oncology, Numab, Replimmune, Rubius Therapeutics, Synlogic, Takeda, Tizona Therapeutics, Inc., BioNTech AG, Scholar Rock, Next Cure     Patents, Royalties, Other Intellectual Property: Serial #15/612,657 (Cancer Immunotherapy), and Serial #PCT/US18/36052 (Microbiome Biomarkers for Anti-PD-1/PD-L1 Responsiveness: Diagnostic, Prognostic and Therapeutic Uses Thereof)     Travel, Accommodations, Expenses: Bristol-Myers Squibb, Array BioPharma, EMD Serono, Janssen, Merck, Novartis, Reflexion Medical, Mersana, Pyxis, Xilio

Dr. Neeraj Agarwal and Dr. Jeanny Aragon-Ching discuss important advances in the treatment of prostate, bladder, and kidney cancers that were presented at the 2025 ASCO Annual Meeting. TRANSCRIPT Dr. Neeraj Agarwal: Hello, and welcome to the ASCO Daily News Podcast. I am Dr. Neeraj Agarwal, your guest host of the ASCO Daily News Podcast today. I am the director of the Genitourinary Oncology Program and a professor of medicine at the University of Utah Huntsman Cancer Institute and editor-in-chief of the ASCO Daily News.  I am delighted to be joined by Dr. Jeanny Aragon-Ching, a GU medical oncologist and the clinical program director of the GU Center at the Inova Schar Cancer Institute in Virginia. Today, we will be discussing some key abstracts in GU oncology that were presented at the 2025 ASCO Annual Meeting.  Our full disclosures are available in the transcript of this episode.  Jeanny, it is great to have you on the podcast. Dr. Jeanny Aragon-Ching: Oh, thank you so much, Neeraj. Dr. Neeraj Agarwal: Jeanny, let's begin with some prostate cancer abstracts. Let's begin with Abstract 5017 titled, “Phase 1 study results of JNJ-78278343 (pasritamig) in metastatic castration-resistant prostate cancer.” Can you walk us through the design and the key findings of this first-in-human trial? Dr. Jeanny Aragon-Ching: Yeah, absolutely, Neeraj. So this study, presented by Dr. Capucine Baldini, introduces pasritamig, a first-in-class T-cell redirecting bispecific antibody that simultaneously binds KLK2 on prostate cancer cells and CD3 receptor complexes on T cells. KLK2 is also known as human kallikrein 2, which is selectively expressed in prostate tissue. And for reference, KLK3 is what we now know as the PSA, prostate-specific antigen, therefore making it an attractive and specific target for therapeutic engagement. Now, while this was an early, first-in-human, phase 1 study, it enrolled 174 heavily pretreated metastatic CRPC patients. So many were previously treated with ARPIs, taxanes, and radioligand therapy. So given the phase 1 nature of this study, the primary objective was to determine the safety and the RP2D, which is the recommended phase 2 dose. Secondary objectives included preliminary assessment of antitumor activity. So, pasritamig was generally well tolerated. There were no treatment-related deaths. Serious adverse events were rare. And in the RP2D safety cohort, where patients received the step-up dosing up to 300 mg of IV every 6 weeks, the most common treatment-related adverse events were low-grade infusion reactions. There was fatigue and grade 1 cytokine release syndrome, what we call CRS. And no cases of neurotoxicity, or what we call ICANS, the immune effector cell-associated neurotoxicity syndrome, reported. Importantly, the CRS occurred in just about 8.9% of patients. All were grade 1. No patients required tocilizumab or discontinued treatment due to adverse events. So, this suggests a favorable safety profile, allowing hopefully for outpatient administration without hospitalization, which will be very important when we're thinking about bispecifics moving forward. In terms of efficacy, pasritamig showed promising activity. About 42.4% of evaluable patients achieved a PSA50 response. Radiographic PFS was about 6.8 months. And among patients with measurable disease, the objective response rate was about 16.1% in those with lymph node or bone metastases, and about 3.7% in those with visceral disease, with a median duration of response of about 11.3 months. So, altogether, this data suggests that pasritamig may offer a well-tolerated and active new potential option for patients with metastatic CRPC.   Again, as a reminder, with the caveat that this is still an early phase 1 study. Dr. Neeraj Agarwal: Thank you, Jeanny. These are promising results for a bispecific T-cell engager, pasritamig, in prostate cancer. I agree, the safety and durability observed here stand out, and this opens the door for further development, possibly even in earlier disease settings.  So, shifting now from immunotherapy to the evolving role of genomics in prostate cancer. So let's discuss Abstract 5094, a real-world, retrospective analysis exploring the prognostic impact of homologous recombination repair gene mutations, especially BRCA1 and BRCA2 mutations, in metastatic hormone-sensitive prostate cancer. Can you tell us more about this abstract, Jeanny? Dr. Jeanny Aragon-Ching: Sure, Neeraj. So this study was presented by Dr. David Olmos, represents one of the largest real-world analyses we have evaluating the impact of homologous recombination repair, or what we would call HRR, alterations in metastatic hormone-sensitive prostate cancer. So, this cohort included 556 men who underwent paired germline and somatic testing. Now, about 30% of patients had HRR alterations, with about 12% harboring BRCA1 or BRCA2 mutations and 16% having alterations in other HRR genes. Importantly, patients were stratified via CHAARTED disease volume, and outcomes were examined across treatment approaches, including ADT alone, doublet therapy, and triplet therapy. The prevalence of BRCA and HRR alterations were about similar between the metastatic hormone-sensitive prostate cancer and the metastatic castrate-resistant prostate cancer, with no differences observed, actually, between the patients with high volume versus low volume disease.  So, the key finding was that BRCA and HRR alterations were associated with poor clinical outcomes in metastatic hormone-sensitive prostate cancer. And notably, the impact of these alterations may actually be even greater in metastatic hormone-sensitive prostate cancer than previously reported in metastatic CRPC. So, the data showed that when BRCA mutations are present, the impact of the volume of disease is actually limited. So, poor outcomes were observed across the board for both high-volume and low-volume groups. So, the analysis showed that patients with HRR alterations had significantly worse outcomes compared to patients without HRR alterations. Median radiographic progression-free survival was about 20.5 months for the HRR-altered patients versus 30.6 months for the non-HRR patients, with a hazard ratio of 1.6. Median overall survival was 39 months for HRR-altered patients compared to 55.7 months for the non-HRR patients, with a hazard ratio of 1.5. Similar significant differences were observed when BRCA-mutant patients were compared with patients harboring non-BRCA HRR mutations. Overall, poor outcomes were independent of treatment of ARPI or taxanes. Dr. Neeraj Agarwal: Thank you, Jeanny. So, these data reinforce homologous recombination repair mutations as both a predictive and prognostic biomarker, not only in the mCRPC, but also in the metastatic hormone-sensitive setting as well. It also makes a strong case for incorporating genomic testing early in the disease course and not waiting until our patients have castration-resistant disease. Dr. Jeanny Aragon-Ching: Absolutely, Neeraj. And I think this really brings home the point and the lead up to the AMPLITUDE trial, which is LBA5006, a phase 3 trial that builds on this very concept of testing with a PARP inhibitor, niraparib, in the hormone-sensitive space. Can you tell us a little bit more about this abstract, Neeraj? Dr. Neeraj Agarwal: Sure. So, the AMPLITUDE trial, a phase 3 trial presented by Dr. Gerhardt Attard, enrolled 696 patients with metastatic hormone-sensitive prostate cancer and HRR gene alterations. 56% of these patients had BRCA1 and BRCA2 mutations. Patients were randomized to receive abiraterone with or without niraparib, a PARP inhibitor. The majority of patients, 78% of these patients, had high-volume metastatic hormone-sensitive prostate cancer, and 87% of these patients had de novo metastatic HSPC. And 16% of these patients received prior docetaxel, which was allowed in the clinical trial. So, with a median follow-up of nearly 31 months, radiographic progression-free survival was significantly prolonged with the niraparib plus abiraterone combination, and median was not reached in this arm, compared to abiraterone alone, which was 29.5 months, with a hazard ratio of 0.63, translating to a 37% reduction in risk of progression or death. This benefit was even more pronounced in the BRCA1 and BRCA2 subgroup, with a 48% reduction in risk of progression, with a hazard ratio of 0.52. Time to symptomatic progression also improved significantly across all patients, including patients with BRCA1, BRCA2, and HRR mutations. Although overall survival data remain immature, early trends favored the niraparib plus abiraterone combination. The safety profile was consistent with prior PARP inhibitor studies, with grade 3 or higher anemia and hypertension were more common but manageable. Treatment discontinuation due to adverse events remained low at 11%, suggesting that timely dose modifications when our patients experience grade 3 side effects may allow our patients to continue treatment without discontinuation. These findings support niraparib plus abiraterone as a potential new standard of care in our patients with metastatic hormone-sensitive prostate cancer with HRR alterations, and especially in those who had BRCA1 and BRCA2 mutations. Dr. Jeanny Aragon-Ching: Thank you, Neeraj. This trial is especially exciting because it brings PARP inhibitors earlier into the treatment paradigm. Dr. Neeraj Agarwal: Exactly. And it is exciting to see the effect of PARP inhibitors in the earlier setting.  So Jeanny, now let's switch gears a bit to bladder cancer, which also saw several impactful studies. Could you tell us about Abstract 4502, an exploratory analysis from the EV-302 trial, which led to approval of enfortumab vedotin plus pembrolizumab for our patients with newly diagnosed metastatic bladder cancer? So here, the authors looked at the outcomes in patients who achieved a confirmed complete response with EV plus pembrolizumab. Dr. Jeanny Aragon-Ching: Sure, Neeraj. So, EV-302 demonstrated significant improvements in progression-free and overall survival for patients previously treated locally advanced or metastatic urothelial cancer, I'll just call it metastatic UC, as a frontline strategy, establishing EV, which is enfortumab vedotin, plus pembro, with pembrolizumab as standard of care in this setting.  So, this year at ASCO, Dr Shilpa Gupta presented this exploratory responder analysis from the phase 3 EV-302 trial. Among 886 randomized patients, about 30.4% of patients, this is about 133, in the EV+P arm, and 14.5% of the patients in the chemotherapy arm, achieved a confirmed complete response. They call it the CCR rates. So for patients who achieved this, median PFS was not reached with EV+P compared to 26.9 months with chemotherapy, with a hazard ratio of 0.36, translating to a 64% reduction in the risk of progression. Overall survival was also improved. So the median OS was not reached in either arm, but the hazard ratio favored the EV+P at 0.37, translating to a 63% reduction in the risk of death. The median duration of complete response was not reached with EV+P compared to 15.2 months with chemotherapy. And among those patients who had confirmed CRs at 24 months, 78% of patients with the EV+P arm remained progression-free, and around 95% of the patients were alive, compared to 54% of patients who were progression-free and 86% alive of the patients in the chemotherapy arm. Safety among responders were also consistent with prior reports. Grade 3 or higher treatment-related adverse events occurred in 62% of EV+P responders and 72% of chemotherapy responders. Most adverse events were managed with dose modifications, and importantly, no treatment-related deaths were reported among those who were able to achieve complete response.  So these findings further reinforce EV and pembro as the preferred first-line therapy for metastatic urothelial carcinoma, offering a higher likelihood of deep, durable responses with a fairly manageable safety profile. Dr. Neeraj Agarwal: Thank you for the great summary, Jeanny. These findings underscore the depth and durability of responses achievable with this combination and also suggest that achieving a response may be a surrogate for long-term benefit in patients with metastatic urothelial carcinoma.  So now, let's move to Abstract 4503, an exploratory ctDNA analysis from the NIAGARA trial, which evaluated perioperative durvalumab, an immune checkpoint inhibitor, in muscle-invasive bladder cancer. So what can you tell us about this abstract? Dr. Jeanny Aragon-Ching: Absolutely, Neeraj. So, in NIAGARA, presented by Dr. Tom Powles, the addition of perioperative durvalumab to neoadjuvant chemotherapy, gem/cis, significantly improved event-free survival, overall survival, and pathologic complete response in patients with cisplatin-eligible muscle-invasive bladder cancer. Recall that this led to the U.S. FDA approval of this treatment regimen on March 28, 2025.  So, a planned exploratory analysis evaluated the ctDNA dynamics and their association with clinical outcomes, which was the one presented recently at ASCO. So, the study found that the incidence of finding ctDNA positivity in these patients was about 57%. Following neoadjuvant treatment, this dropped to about 22%, with ctDNA clearance being more common in the durvalumab arm, about 41%, compared to the chemotherapy control arm of 31%. Notably, 97% of patients who remained ctDNA positive prior to surgery failed to achieve a pathologic CR. So, this indicates a strong association between ctDNA persistence and lack of tumor eradication. So, postoperatively, only about 9% of patients were ctDNA positive. So, importantly, durvalumab conferred an event-free survival benefit regardless of ctDNA status at both baseline and post-surgery. Among patients who were ctDNA positive at baseline, durvalumab led to a hazard ratio of 0.73 for EFS. So, this translates to a 27% reduction in the risk of disease recurrence, progression, or death compared to the control arm. In the post-surgical ctDNA-positive group, the disease-free survival was also improved with a hazard ratio of 0.49, translating to a 51% reduction in the risk of recurrence.  So, these findings underscore the prognostic value of ctDNA and suggest that durvalumab provides clinical benefit irrespective of molecular residual disease status. So, the data also supports that ctDNA is a promising biomarker for future personalized strategies in the perioperative treatment of muscle-invasive bladder cancer. Dr. Neeraj Agarwal: Thank you, Jeanny. It is great to see that durvalumab is improving outcomes in these patients regardless of ctDNA status. However, based on these data, presence of ctDNA in our patients warrants a closer follow-up with imaging studies, because these patients with positive ctDNA seem to have a higher risk of recurrence. Dr. Jeanny Aragon-Ching: I agree, Neeraj.  Let's round out the bladder cancer discussion with Abstract 4518, which reported the interim results of SURE-02, which is a phase 2 study evaluating neoadjuvant sacituzumab govitecan plus pembrolizumab in cisplatin-ineligible muscle-invasive bladder cancer. Can you tell us more about this abstract, Neeraj? Dr. Neeraj Agarwal: Sure, Jeanny. So, Dr Andrea Necchi presented interim results from the SURE-02 trial. This is a phase 2 study evaluating neoadjuvant sacituzumab govitecan plus pembrolizumab, followed by a response-adapted bladder-sparing treatment and adjuvant pembrolizumab in patients with muscle-invasive bladder cancer.  So, in this interim analysis, 40 patients were treated and 31 patients were evaluable for efficacy. So, the clinical complete response rate was 38.7%. All patients achieving clinical complete response underwent bladder-sparing approach with a repeat TURBT instead of radical cystectomy. Additionally, 51.6% of patients achieved excellent pathologic response with a T stage of 1 or less after neoadjuvant therapy. The treatment was well tolerated, with only 12.9% of patients experiencing grade 3 or higher adverse events without needing dose reduction of sacituzumab. Molecular profiling, interestingly, showed that clinical complete response correlated with luminal and genomically unstable subtypes, while high stromal gene expression was associated with lack of response.  These results suggest that sacituzumab plus pembrolizumab combination has promising activity in this setting, and tolerability, and along with other factors may potentially allow a bladder preservation approach in a substantial number of patients down the line. Dr. Jeanny Aragon-Ching: Yeah, agree with you, Neeraj. And the findings are very provocative and support completing the full trial enrollment and further exploration of this strategy in muscle-invasive bladder cancer in order to improve and provide further bladder-sparing strategies. Dr. Neeraj Agarwal: Agree. So, let's now turn to the kidney cancer, starting with Abstract 4505, the final overall analysis from CheckMate-214 trial, which evaluated nivolumab plus ipilimumab, so dual checkpoint inhibition strategy, versus sunitinib in our patients with metastatic clear cell renal cell carcinoma. Dr. Jeanny Aragon-Ching: Yeah, absolutely, Neeraj. So, the final 9-year analysis of the phase 3 CheckMate-214 trial confirms the long-term superiority of nivolumab and ipilimumab over sunitinib for first-line treatment of advanced metastatic renal cell carcinoma. So, this has a median follow-up of 9 years. Overall survival remains significantly improved with the combination. So, in the ITT patient population, the intention-to-treat, the hazard ratio for overall survival was 0.71. So, this translates to a 29% reduction in the risk of death. 31% of patients were alive at this 108-month follow-up compared to 20% only in those who got sunitinib. So, similar benefits were observed in the intermediate- and poor-risk groups with a hazard ratio of 0.69, and 30% versus 19% survival at 108 months.  Importantly, a delayed benefit was also seen in those favorable-risk patients. So, the hazard ratio for overall survival improved from 1.45 in the initial report and now at 0.8 at 9 years follow-up, with 35% of patients alive at 108 months compared to 22% in those who got sunitinib. Progression-free survival also favored the nivo-ipi arm across all risk groups. At 96 months, the probability of remaining progression-free was about 23% compared to 9% in the sunitinib arm in the ITT patient population, 25% versus 9% in the intermediate- and poor-risk patients, and 13% compared to 11% in the favorable-risk patients. Importantly, at 96 months, 48% of patients in the nivo-ipi responders remained in response compared to just 19% in those who got sunitinib. And in the favorable-risk group, 36% of patients who responded remained in response, although data were not available for sunitinib in this subgroup.  So, this data reinforces the use of nivolumab and ipilimumab as a durable and effective first-line effective strategy for standard of care across all risk groups for advanced renal cell carcinoma. Dr. Neeraj Agarwal: Thank you, Jeanny. And of course, since ipi-nivo data were presented, several other novel ICI-TKI combinations have emerged. And I'm really hoping to see very similar data with TKI-ICI combinations down the line. It is really important to note that we are not seeing any new safety signals with the ICI combinations or ICI-based therapies, which is very reassuring given the extended exposure. Dr. Jeanny Aragon-Ching: Absolutely agree with you there, Neeraj.  Now, going on and moving on to Abstract 4514, which is the KEYNOTE-564 trial, and they reported on the 5-year outcomes of adjuvant pembrolizumab in clear cell RCC in patients who are at high risk for recurrence. Can you tell us a little bit more about this abstract, Neeraj? Dr. Neeraj Agarwal: Sure. So, the KEYNOTE-564 trial established pembrolizumab monotherapy as the first adjuvant regimen to significantly improve both disease-free survival and overall survival compared to placebo after surgery for patients with clear cell renal cell carcinoma. So, Dr Naomi Haas presented the 5-year update from this landmark trial.  A total of 994 patients were randomized to receive either pembrolizumab or placebo. The median follow-up at the time of this analysis was approximately 70 months. Disease-free survival remained significantly improved with pembrolizumab. The median DFS was not reached with pembrolizumab compared to 68.3 months with placebo, with a hazard ratio of 0.71, translating to a 29% reduction in risk of recurrence. At 5 years, 60.9% of patients receiving pembrolizumab remained disease-free compared to 52.2% with placebo. Overall survival also favored pembrolizumab. The hazard ratio for OS was 0.66, translating to a 34% reduction in risk of death, with an estimated 5-year overall survival rate of 87.7% with pembrolizumab compared to 82.3% for placebo. Importantly, these benefits were consistent across all key subgroups, including patients with sarcomatoid features. In addition, no new serious treatment-related adverse events have been reported in the 3 years since treatment completion.  So, these long-term data confirm pembrolizumab as a durable and effective standard adjuvant therapy for patients with resected, high-risk clear cell renal cell carcinoma. Dr. Jeanny Aragon-Ching: Thank you for that wonderful summary, Neeraj. Dr. Neeraj Agarwal: That wraps up our kidney cancer highlights. Any closing thoughts, Jeanny, before we conclude? Dr. Jeanny Aragon-Ching: It's been so wonderful reviewing these abstracts with you, Neeraj. So, the 2025 ASCO Annual Meeting showcased a lot of transformative data across GU cancers, from first-in-class bispecifics to long-term survival in RCC. And these findings are already shaping our clinical practices. Dr. Neeraj Agarwal: I agree. And we have covered a broad spectrum of innovations in GU cancers with strong clinical relevance.  So, thank you, Jeanny, for joining me today and sharing your insights.  And thank you to our listeners for joining us. You will find links to the abstracts discussed today in the transcript of this episode. If you find these conversations valuable, please take a moment to rate, review, and subscribe to the ASCO Daily News Podcast wherever you listen. Thank you so much. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions.  Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers:    Dr. Neeraj Agarwal     @neerajaiims     Dr. Jeanny Aragon-Ching   Follow ASCO on social media:       @ASCO on Twitter       ASCO on Bluesky   ASCO on Facebook       ASCO on LinkedIn       Disclosures:   Dr. Neeraj Agarwal:   Consulting or Advisory Role: Pfizer, Bristol-Myers Squibb, AstraZeneca, Nektar, Lilly, Bayer, Pharmacyclics, Foundation Medicine, Astellas Pharma, Lilly, Exelixis, AstraZeneca, Pfizer, Merck, Novartis, Eisai, Seattle Genetics, EMD Serono, Janssen Oncology, AVEO, Calithera Biosciences, MEI Pharma, Genentech, Astellas Pharma, Foundation Medicine, and Gilead Sciences  Research Funding (Institution): Bayer, Bristol-Myers Squibb, Takeda, Pfizer, Exelixis, Amgen, AstraZeneca, Calithera Biosciences, Celldex, Eisai, Genentech, Immunomedics, Janssen, Merck, Lilly, Nektar, ORIC Pharmaceuticals, Crispr Therapeutics, Arvinas  Dr. Jeanny Aragon-Ching:   Honoraria: Bristol-Myers Squibb, EMD Serono, Astellas Scientific and Medical Affairs Inc., Pfizer/EMD Serono   Consulting or Advisory Role: Algeta/Bayer, Dendreon, AstraZeneca, Janssen Biotech, Sanofi, EMD Serono, MedImmune, Bayer, Merck, Seattle Genetics, Pfizer, Immunomedics, Amgen, AVEO, Pfizer/Myovant, Exelixis,    Speakers’ Bureau: Astellas Pharma, Janssen-Ortho, Bristol-Myers Squibb, Astellas/Seattle Genetics

Dr. Vamsi Velcheti and Dr. Nate Pennell discuss novel treatment approaches in small cell and non-small cell lung cancer that were featured at the 2025 ASCO Annual Meeting. TRANSCRIPT Dr. Vamsi Velcheti: Hello, I'm Dr. Vamsi Velcheti, your guest host of the ASCO Daily News Podcast. I'm a professor of medicine and chief of hematology and oncology at the Mayo Clinic in Jacksonville, Florida. The 2025 ASCO Annual Meeting featured some exciting advancements in small cell lung cancer, targeted therapies for non-small cell lung cancer, and other novel [treatment] approaches. Today, I'm delighted to be joined by Dr. Nate Pennell to discuss some of the key abstracts that are advancing the lung cancer field. Dr. Pennell is the co-director of the Cleveland Clinic Lung Cancer Program and also the vice chair of clinical research at the Taussig Cancer Institute. Our full disclosures are available in the transcript of this episode. Nate, it's great to have you back on the podcast. Thanks so much for being here. Dr. Nate Pennell: Thanks, Vamsi. Always a pleasure. Dr. Vamsi Velcheti: Let's get started, and I think the first abstract that really caught my attention was Abstract 8516, “The Randomized Trial of Relevance of Time of Day of Immunotherapy for Progression-Free and Overall Survival in Patients With Non-Small Cell Lung Cancer.” What are your thoughts about this, Nate? Dr. Nate Pennell: I agree. I thought this was one of the most discussed abstracts, certainly in the lung cancer session, but I think even outside of lung cancer, it got some discussion. So, just to put this in perspective, there have been a number of publications that have all been remarkably consistent, and not just in lung cancer but across multiple cancer types, that immunotherapy, immune checkpoint inhibitors, are commonly used. And all of them have suggested, when looking at retrospective cohorts, that patients who receive immune checkpoint inhibitors earlier in the day – so in the morning or before the early afternoon – for whatever reason, appear to have better outcomes than those who get it later in the day, and this has been repeated. And I think many people just sort of assumed that this was some sort of strange association and that there was something fundamentally different from a prognostic standpoint in people who came in in the morning to get their treatment versus those who came later in the afternoon, and that was probably the explanation. The authors of this randomized trial actually decided to test this concept. And so, about 210 patients with previously untreated advanced non-small cell lung cancer were randomly assigned to get chemo and immune checkpoint inhibitor – either pembrolizumab or sintilimab – and half of them were randomly assigned to get the treatment before 3 PM in the afternoon, and half of them were assigned to get it after 3 PM in the afternoon. And it almost completely recapitulated what was seen in the retrospective cohorts. So, the median progression-free survival in those who got earlier treatment was 13.2 months versus only 6.5 months in those who got it later in the day. So, really enormous difference with a hazard ratio of 0.43, which was statistically significant. And perhaps even more striking, the median overall survival was not reached in the early group versus 17.8 months in the late group with a hazard ratio of 0.43, also highly statistically significant. Even the response rate was 20% higher in the early patients; 75% response rate compared to 56% in the late-time-of-day patients. So very consistent across all measures of efficacy with pretty good matched characteristics across the different groups. And so, I have to tell you, I don't know what to make of this. I certainly was a skeptic about the retrospective series, but now we have a prospective randomized trial that shows essentially the same thing. So, maybe there is a difference between getting treated in the morning, although I have yet to hear someone give a very good mechanistic explanation as to why this would be. What were your thoughts on this? Dr. Vamsi Velcheti: It's indeed fascinating, Nate, and I actually think this was a very interesting abstract. Really, I was caught off guard looking at the data. I mean, if it were a drug, we would be so excited, right? I mean, with those kind of survival benefits. I don't know. I think circadian rhythm probably has something to do with it, like different cytokine profiles at the time of administration. I mean, who knows? But I think it's a randomized trial, and I think I would expect to see a mad rush for treatment appointments early in the morning given this, and at least I want my patients to come in first thing in the morning. It'll be interesting to see. Dr. Nate Pennell: It’s important to point out that in this study, everyone got chemo and immunotherapy. And, at least in our cancer center, most patients who are getting platinum-doublet chemotherapy and immunotherapy actually do get treated earlier in the day already, just because of the length of the infusion appointment that's needed. So it really is oftentimes people getting single-agent immunotherapy who are often getting the later, shorter visits. But if you have a choice, I think it would be very reasonable to have people treated earlier in the day. And I do think most of the impressions that I got from people about this is that they would like to see it reproduced but certainly well worth further investigation. And I personally would like to see more investigation into what the rationale would be for this because I still can't quite figure out, yes, if you got it at, say, you know, 5 PM, that's later in the day and I can understand that maybe your immune system is somewhat less receptive at that point than it would be in the morning. But because these checkpoint inhibitors have such long half-lives, it's still in your system the next morning when your immune system is supposedly more receptive. So I don't quite understand why that would be the case. Well, let's move on to the next study. I would like to hear your thoughts on Abstract 8515, “Plasma-Guided, Adaptive First-Line Chemoimmunotherapy for Non-Small Cell Lung Cancer.” Dr. Vamsi Velcheti: Yeah, this was another abstract that seems to be really interesting in my opinion. I think there's kind of a lot of emphasis lately on ctDNA and MRD-based assays to monitor disease. In the lung cancer space, we haven't had a lot of clinical trials looking at this prospectively, and this was one of those pilot studies where they looked at circulating free DNA (cfDNA)-based response-adaptive strategy for frontline patients who are PD-L1 positive. So, patients started with pembrolizumab monotherapy, and based on plasma molecular response after 2 cycles, those patients without response received early treatment intensification with a platinum doublet. So the approach essentially was to reduce the chemotherapy exposure in patients who respond to immunotherapy. And only about 17.5% of the patients on the trial received chemotherapy based on lack of molecular response. So, in this trial, what they found was patients with the cfDNA response had a markedly improved PFS of 16.4 months versus 4.8 months. So essentially, like, this is a really nice study to set a foundation on which we have to do larger studies to incorporate molecular markers trying to look at cfDNA response to inform treatment strategy, either escalation or de-escalation strategies. So, I thought it was a very interesting study. Dr. Nate Pennell: Yeah. I mean, we always have this question for patients, “Should they get immunotherapy alone or combined with chemo?” and I think this certainly is intriguing, suggesting that there may be ways you can monitor people and perhaps rescue those that aren't going to respond to single agent. I'd like to see a randomized trial against, you know, this strategy, perhaps against everyone getting, say, chemoimmunotherapy or make sure that you're not potentially harming people by doing this strategy. But I agree, it's time to move beyond just observing that cell-free DNA is prognostic and important and start using it to actually guide treatment. Dr. Vamsi Velcheti: Yeah, and I would just caution though, like, you know, I think we need more data, but, however, it's certainly a very interesting piece of data to kind of help inform future trials. So, there was another abstract that caught my attention, and I think this would be a very interesting abstract in the EGFR space. Abstract 8506, "Patritumab Deruxtecan (HER3-DXd) in Resistant EGFR-Mutant Advanced Non-Small Cell Lung Cancer Patients After Third-Generation EGFR TKI," it’s the HERTHENA-Lung02 study. What do you think about the results of this study? Dr. Nate Pennell: Yeah, this was, I would say, very widely anticipated and ultimately a little disappointing, despite being a positive trial. So, these are patients with EGFR-mutant non-small cell lung cancer who have progressed after a third-generation EGFR TKI like osimertinib. This is really an area of major unmet need. We do have drugs like amivantamab in this space, but still definitely an area where essentially patients move from having a highly effective oral therapy to being in the realm of chemotherapy as their best option. So, this HER3 antibody-drug conjugate, patritumab deruxtecan, had some good single-arm data for this. And we're sort of hoping this would become an available option for patients. This trial was designed against platinum-doublet chemotherapy in this setting and with a primary endpoint of progression-free survival. And it actually was positive for improved progression-free survival compared to chemo with a hazard ratio of 0.77. But when you look at the medians, you can see that the median PFS was only 5.8 versus 5.4 months. It was really a modest difference between the two arms. And on the interim analysis, it appeared that there will not be a difference in overall survival between the two arms. In fact, the hazard ratio at the interim analysis was 0.98 for the two arms. So based on this, unfortunately, the company that developed the HER3-DXd has withdrawn their application to the FDA for approval of the drug, anticipating that they probably wouldn't get past approval without that overall survival endpoint. So, unfortunately, probably not, at least for the near future, going to be a new option for these patients. Dr. Vamsi Velcheti: Yeah, I think this is a space that's clearly an unmet need, and this was a big disappointment, I should say. I think all of us were going into the meeting anticipating some change in the standard of care here. Dr. Nate Pennell: Yeah, I agree. It was something that I was telling patients, honestly, that I was expecting this to be coming, and so now, definitely a bit of a disappointment. But it happens and, hopefully, it will still find perhaps a role or other drugs with a similar target. Certainly an active area. Well, let's leave the EGFR-mutant space and move into small cell. There were a couple of very impactful studies. And one of them was Abstract 8006, “Lurbinectedin Plus Atezolizumab as First-Line Maintenance Treatment in Patients With Extensive-Stage Small Cell Lung Cancer, Primary Results from the Phase III IMforte Trial.” So, what was your impression of this? Dr. Vamsi Velcheti: Yeah, I think this is definitely an interesting study, and small cell, I remember those days when we had barely any studies of small cell at ASCO, and now we have a lot of exciting developments in the small cell space. It's really good to see. The IMforte trial is essentially like a maintenance lurbinectedin trial with atezolizumab maintenance. And the study was a positive trial. The primary endpoint was a PFS, and the study showed improvement in both PFS and OS with the addition of lurbinectedin to atezolizumab maintenance. And definitely, it's a positive trial, met its primary endpoint, but I always am a little skeptical of adding maintenance cytotoxic therapies here in this setting. In my practice, and I'd like to hear your opinion, Nate, most patients with small cell after 4 cycles of a platinum doublet, they're kind of really beaten up. Adding more cytotoxic therapy in the maintenance space is going to be tough, I think, for a lot of patients. But also, most importantly, I think this rapidly evolving landscape for patients with small cell lung cancer with multiple new, exciting agents, actually like some FDA-approved like tarlatamab, also like a lot of these emerging therapeutics like I-DXd and other ADCs in this space. You kind of wonder, is it really optimal strategy to bring on like another cytotoxic agent right after induction chemotherapy, or do you kind of delay that? Or maybe have like a different strategy in terms of maintenance. I know that the tarlatamab maintenance trial is probably going to read out at some point too. I think it's a little challenging. The hazard ratio is also 0.73. As I said, it's a positive trial, but it's just incremental benefit of adding lurbi. And also on the trial, we need to also pay attention to the post-progression second-line treatments, number of patients who received tarlatamab or any other investigational agents.  So I think it's a lot of questions still. I'm not quite sure I'd be able to embrace this completely. I think a vast majority of my patients might not be eligible anyway for cytotoxic chemotherapy maintenance right away, but yeah, it's tough. Dr. Nate Pennell: Yeah. I would call this a single and not a home run. It definitely is real. It was a real overall survival benefit. Certainly not surprising that a maintenance therapy would improve progression-free survival. We've known that for a long time in small cell, but first to really show an overall survival benefit. But I completely agree with you. I mean, many people are not going to want to continue further cytotoxics after 4 cycles of platinum-doublet chemo. So I would say, for those that are young and healthy and fly through chemo without a lot of toxicity, I think certainly something worth mentioning. The problem with small cell, of course, is that so many people get sick so quickly while on that observation period after first-line chemo that they don't make it to second-line treatment. And so, giving everyone maintenance therapy essentially ensures everyone gets that second-line treatment. But they also lose that potentially precious few months where they feel good and normal and are able to be off of treatment. So, I would say this is something where we're really going to have to kind of sit and have that shared decision-making visit with patients and decide what's meaningful to them. Dr. Vamsi Velcheti: Yeah, I agree. The next abstract that was a Late-Breaking Abstract, 8000, “Overall Survival of Neoadjuvant Nivolumab Plus Chemotherapy in Patients With Resectable Non-Small Cell Lung Cancer in CheckMate-816.” This was a highly anticipated read-out of the OS data from 816. What did you make of this abstract? Dr. Nate Pennell: Yeah, I thought this was great. Of course, CheckMate-816 changed practice a number of years ago when it first reported out. So, this was the first of the neoadjuvant or perioperative chemoimmunotherapy studies in resectable non-small cell lung cancer. So, just to review, this was a phase 3 study for patients with what we would now consider stage II or stage IIIA resectable non-small cell lung cancer. And they received three cycles of either chemotherapy or chemotherapy plus nivolumab, and that was it. That was the whole treatment. No adjuvant treatment was given afterwards. They went to resection. And patients who received the chemoimmunotherapy had a much higher pathologic complete response rate and a much better event-free survival. And based on this, this regimen was approved and, I think, at least in the United States, widely adopted.  Now, since the first presentation of CheckMate 816, there have been a number of perioperative studies that have included an adjuvant component of immunotherapy – KEYNOTE-671, the AEGEAN study – and these also have shown improved outcomes. The KEYNOTE study with pembrolizumab also with an overall survival benefit. And I think people forgot a little bit about CheckMate-816. So, this was the 5-year overall survival final analysis. And it did show a statistically and, I think, clinically meaningful difference in overall survival with the 3 cycles of neoadjuvant chemo-nivo compared to chemo with a hazard ratio of 0.72. The 5-year overall survival of 65% in the chemo-IO group versus 55% with the chemo alone. So a meaningful improvement. And interestingly, that hazard ratio of 0.72 is very similar to what was seen in the peri-operative pembro study that included the adjuvant component. So, very much still relevant for people who think that perhaps the value of those neoadjuvant treatments might be really where most of the impact comes from this type of approach. They also gave us an update on those with pathologic complete response, showing really astronomically good outcomes. If you have a pathologic complete response, which was more than a quarter of patients, the long-term survival was just phenomenal. I mean, 95% alive at 5 years if they were in that group and suggesting that in those patients at least, the adjuvant treatment may not be all that important.  So, I think this was an exciting update and still leaves very much the open question about the importance of continuing immunotherapy after surgery after the neoadjuvant component. Dr. Vamsi Velcheti: Yeah, I completely agree, Nate. I think the million-dollar question is: “Is there like a population of patients who don't have complete response but like maybe close to complete response?” So, would you like still consider stopping adjuvant IO? I probably would not be comfortable, but I think sometimes, you know, we all have patients who are like very apprehensive of continuing treatments. So, I think that we really need more studies, especially for those patients who don't achieve a complete CR. I think trying to find strategies for like de-escalation based on MRD or other risk factors. But we need more trials in that space to inform not just de-escalation, but there are some patients who don't respond at all to a neoadjuvant IO. So, there may be an opportunity for escalating adjuvant therapies. So, it is an interesting space to watch out for. Dr. Nate Pennell: No, absolutely. Moving to KRAS-mutant space, so our very common situation in patients with non-small cell lung cancer, we had the results of Abstract 8500, “First-Line Adagrasib With Pembrolizumab in Patients With Advanced or Metastatic KRASG12C-Mutated Non-Small Cell Lung Cancer” from the phase 2 portion of the KRYSTAL-7 study. Why was this an interesting and important study? Dr. Vamsi Velcheti: First of all, there were attempts to kind of combine KRASG12C inhibitors in the past with immune checkpoint inhibitors, notably sotorasib with pembrolizumab. Unfortunately, those trials have led to like a lot of toxicity, with increased especially liver toxicity, which was a major issue. This is a phase 2 study of adagrasib in combination with pembrolizumab, and this is a study in the frontline setting in patients with the G12C-mutant metastatic non-small cell lung cancer. And across all the PD-L1 groups, the ORR was 44%, and the median PFS was 11 months, comparable to the previous data that we have seen with adagrasib in this setting. So it's not like a major improvement in clinical efficacy. However, I think the toxicity profile that we were seeing was slightly better than the previous trials in combination with sotorasib, but you still have a fair amount of transaminitis even in the study. At this point, this is not ready for clinical primetime. I don't think we should be using sotorasib or adagrasib in the frontline or even in the second line in combination with checkpoint inhibitors. Combining these drugs with checkpoint inhibitors in the clinical practice might lead to adverse outcomes. So, we need to wait for more data like newer-generation G12C inhibitors which are also being studied in combination, so we'll have to kind of wait for more data to emerge in this space. Dr. Nate Pennell: I agree, this is not immediately practice changing. This is really an attempt to try to combine targeted treatment with immune checkpoint inhibitor. And I agree with you that, you know, it does appear to be perhaps a little bit better tolerated than some of the prior combinations that have tried in this space. The outcomes overall were not that impressive, although in the PD-L1 greater than 50%, it did have a better response rate perhaps than you would expect with either drug alone. And I do think that the company is focusing on that population for a future randomized trial, which certainly would inform this question better. But in the meantime, I agree with you, there's a lot of newer drugs that are coming along that potentially may be more active and better tolerated. And so, I'd say for now, interesting but we'll wait and see. Dr. Vamsi Velcheti: Yeah, so now moving back again to small cell. So, there was a Late-Breaking Abstract, 8008. This is a study of tarlatamab versus chemotherapy as second-line treatment for small cell lung cancer. They presented the primary analysis of the phase III DeLLphi-304 study. What do you think about this? Dr. Nate Pennell: Yeah, I thought this was really exciting. This was, I would say, perhaps the most important lung study that was presented. Tarlatamab is, of course, the anti-DLL3 bispecific T-cell engager compound, which is already FDA approved based on a prior single-arm phase II study, which showed a very nice response rate as a single agent in previously treated small cell lung cancer and relatively manageable side effects, although somewhat unique to solid tumor docs in the use of these bispecific drugs in things like cytokine release syndrome and ICANS, the neurologic toxicities. So, this trial was important because tarlatamab was approved, but there were also other chemotherapy drugs approved in the previously treated space. And so, this was a head-to-head second-line competition comparison between tarlatamab and either topotecan, lurbinectedin, or amrubicin in previously treated small cell patients with a primary endpoint of overall survival. So, a very well-designed trial. And it did show, I think, a very impressive improvement in overall survival with a median overall survival in the tarlatamab group of 13.6 months compared to 8.3 months with chemotherapy, hazard ratio of 0.6. And progression-free survival was also longer at 4.2 months versus 3.2 months, hazard ratio of 0.72. In addition to showing improvements in cancer-related symptoms that were improved in tarlatamab compared to chemotherapy, there was actually also significantly lower rates of serious treatment-related adverse events with tarlatamab compared to chemotherapy. So, you do still see the cytokine release syndrome, which is seen in most people but is manageable because these patients are admitted to the hospital for the first two cycles, as well as a significant number of patients with neurologic side effects, the so-called ICANS, which also can be treated with steroids. And so, I think based upon the very significant improvement in outcomes, I would expect that this should become our kind of standard second-line treatment since it seems to be much better than chemo. However, tarlatamab is definitely a new drug that a lot of places are not used to using, and I think a lot of cancer centers, especially ones that aren't tied to a hospital, may have questions about how to deal with the CRS. So, I'm curious your thoughts on that. Dr. Vamsi Velcheti: Yeah, thank you, Nate. And I completely agree. I think the data looked really promising, and I've already been using tarlatamab in the second-line space. The durability of response and overall, having used tarlatamab quite a bit - like, I participated in some of the early trials and also used it as standard of care - tarlatamab has unique challenges in terms of like need for hospitalization for monitoring for the first few treatments and make sure, you know, we monitor those patients for CRS and ICANS. But once you get past that initial administration and monitoring of CRS, these patients have a much better quality of life, they're off chemotherapy, and I think it's really about the logistics of actually administering tarlatamab and coordination with the hospital and administration in the outpatient setting. It's definitely challenging, but I think it definitely can be done and should be done given what we are seeing in terms of clinical efficacy here. Dr. Nate Pennell: I agree. I think hospital systems now are just going to have to find a way to be able to get this on formulary and use it because it clearly seems to be more effective and generally better tolerated by patients. So, should move forward, I think. Finally, there's an abstract I wanted to ask you about, Abstract 8001, which is the “Neoadjuvant osimertinib with or without chemotherapy versus chemotherapy alone in resectable epidermal growth factor receptor-mutated non-small cell lung cancer: The NeoADAURA Study”. And this is one that I think was also fairly highly anticipated. So, what are your thoughts? Dr. Vamsi Velcheti: You know, I wasn't probably surprised with the results, and I believe we were all expecting a positive trial, and we certainly were handed a positive trial here. It's a phase III trial of osimertinib and chemotherapy or osimertinib in the neoadjuvant space followed by surgery, followed by osimertinib. It's a global phase 3 trial and very well conducted, and patients with stage II to stage IIIB were enrolled in the study. And in the trial, patients who had a neoadjuvant osimertinib with or without chemotherapy showed a significant improvement in major pathologic response rates over chemotherapy alone. And the EFS was also positive for osimertinib and chemotherapy, osimertinib monotherapy as well compared to chemotherapy alone. So overall, the study met its primary endpoint, and I think it sheds light on how we manage our patients with early-stage lung cancer. I think osimertinib, we know that osimertinib is already FDA approved in the adjuvant space, but what we didn't really know is how was osimertinib going to work in the neoadjuvant space. And there are always situations, especially for stage III patients, where we are on the fence about, are these patients already close to being metastatic? They have, like, almost all these patients have micrometastatic disease, even if they have stage III. As we saw in the LAURA data, when you look at the control arm, it was like a very short PFS. Chemoradiation does nothing for those patients, and I think these patients have systemic mets, either gross or micrometastatic disease at onset. So, it's really important to incorporate osimertinib early in the treatment course. And I think, especially for the locally advanced patients, I think it's even more important to kind of incorporate osimertinib in the neoadjuvant space and get effective local control with surgery and treat them with adjuvant. I'm curious to hear your thoughts, Nate. Dr. Nate Pennell: I am a believer and have long been a believer in targeted adjuvant treatments, and, you know, it has always bothered me somewhat that we're using our far and away most effective systemic therapy; we wait until after they go through all their pre-op treatments, they go through surgery, then they go through chemotherapy, and then finally months later, they get their osimertinib, and it still clearly improves survival in the adjuvant setting. Why not just start the osimertinib as soon as you know that the patient has EGFR-mutant non-small cell lung cancer, and then you can move on to surgery and adjuvant treatment afterwards? And I think what was remarkable about this study is that all of these patients almost - 90% in each arm - went to surgery. So, you weren't harming them with the neoadjuvant treatment. And clearly better major pathologic response, nodal downstaging, event-free survival was better. But I don't know that this trial is ever going to show an overall survival difference between neoadjuvant versus just surgery and adjuvant treatment, given how effective the drug is in the adjuvant setting. Nonetheless, I think the data is compelling enough to consider this, certainly for our N2-positive, stage IIIA patients or a IIIB who might be otherwise surgical candidates. I think based on this, I would certainly consider that. Dr. Vamsi Velcheti: Yeah, and especially for EGFR, like even for stage IIIB patients, in the light of the LAURA study, those patients who do not do too well with chemoradiation. So you're kind of delaying effective systemic therapy, as you said, waiting for the chemoradiation to finish. So I think probably time to revisit how we kind of manage these locally advanced EGFR patients. Dr. Nate Pennell: Yep, I agree. Dr. Vamsi Velcheti: Nate, thank you so much for sharing your fantastic insights today on the ASCO Daily News Podcast. It's been an exciting ASCO again. You know, we've seen a lot of positive trials impacting our care of non-small cell lung cancer and small cell lung cancer patients. Dr. Nate Pennell: Thanks for inviting me, Vamsi. Always a pleasure to discuss these with you. Dr. Vamsi Velcheti: And thanks to our listeners for your time today. You will find links to all of the abstracts discussed today in the transcript of the episode. Finally, if you value the insights that you hear from the ASCO Daily News Podcast, please take a moment to rate, review, subscribe wherever you get your podcast. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. More on today’s speakers:    Dr. Vamsi Velcheti   @VamsiVelcheti    Dr. Nathan Pennell   @n8pennell   Follow ASCO on social media:     @ASCO on Twitter     ASCO on Facebook     ASCO on LinkedIn   ASCO on BlueSky   Disclosures:   Dr. Vamsi Velcheti:   Honoraria: ITeos Therapeutics   Consulting or Advisory Role: Bristol-Myers Squibb, Merck, Foundation Medicine, AstraZeneca/MedImmune, Novartis, Lilly, EMD Serono, GSK, Amgen, Elevation Oncology, Taiho Oncology, Merus   Research Funding (Inst.): Genentech, Trovagene, Eisai, OncoPlex Diagnostics, Alkermes, NantOmics, Genoptix, Altor BioScience, Merck, Bristol-Myers Squibb, Atreca, Heat Biologics, Leap Therapeutics, RSIP Vision, GlaxoSmithKline   Dr. Nathan Pennell:     Consulting or Advisory Role: AstraZeneca, Lilly, Cota Healthcare, Merck, Bristol-Myers Squibb, Genentech, Amgen, G1 Therapeutics, Pfizer, Boehringer Ingelheim, Viosera, Xencor, Mirati Therapeutics, Janssen Oncology, Sanofi/Regeneron    Research Funding (Inst): Genentech, AstraZeneca, Merck, Loxo, Altor BioScience, Spectrum Pharmaceuticals, Bristol-Myers Squibb, Jounce Therapeutics, Mirati Therapeutics, Heat Biologics, WindMIL, Sanofi 

Dr. Shaalan Beg and Dr. Kristen Ciombor discuss practice-changing studies in GI cancers and other novel treatment approaches that were presented at the 2025 ASCO Annual Meeting. Transcript Dr. Shaalan Beg: Hello, I'm Dr. Shaalan Beg, welcoming you to the ASCO Daily News Podcast. I'm a medical oncologist and an adjunct associate professor at UT Southwestern Medical Center in Dallas, Texas. There were some remarkable advances in gastrointestinal cancers that were presented at the 2025 ASCO Annual Meeting, and I'm delighted to be joined by Dr. Kristen Ciombor to discuss some exciting GI data. Dr. Ciombor is the Ingram Associate Professor of Cancer Research and a co-leader of Translational Research and the Interventional Oncology Research Program at the Vanderbilt Ingram Cancer Center. Our full disclosures are available in the transcript of this episode. Dr. Ciombor, it's great to have you on the podcast today. Dr. Kristen Ciombor: Thanks, Dr Beg. It's great to be here. Dr. Shaalan Beg: Alright, let's kick it off. Big year for GI cancers. We'll start off with LBA1. This was the ATOMIC study sponsored by NCI and the National Clinical Trials Network (NCTN) and the Alliance group. This is a randomized study of standard chemotherapy alone or combined with atezolizumab as adjuvant therapy for stage III mismatch repair deficient colorectal cancer. Dr. Kristen Ciombor: I think this study was really definitely practice-changing, as you can tell because it was a Plenary. But I do have some concerns in terms of how we're actually going to implement this and whether this is the final answer in this disease subtype. So, as you said, the patients were enrolled with stage III resected mismatch repair deficient colon cancer, and then they were randomized to either modified FOLFOX6 with or without atezolizumab. And that's where it starts to become interesting because not many of us give FOLFOX for 6 months like was done in this study. Obviously, the study was done over many years, so that was part of that answer, but also the patients received atezolizumab for a total of 12 months. So the question, I think, that comes from this abstract is, is this practical and is this the final answer? I do think that this is practice-changing, and I will be talking to my patients with resected mismatch repair deficient colon cancer about FOLFOX plus atezolizumab. I think the big question is, do these patients need chemotherapy? And can we do a neoadjuvant approach instead? And that's where we don't have all the answers yet. Dr. Shaalan Beg: Yeah, but it has been great to see immunotherapy make its way into the adjuvant space after having made such a big impact in the metastatic space, but still some unanswered questions in terms of the need for chemotherapy and then the duration of therapy, which I guess we'll have to stay tuned in for the next couple of years to to get a lot of those questions answered. Dr. Kristen Ciombor: Yeah, but a big congratulations to the study team, to the NCTN, the NCI. I mean, this is really a great example of federally funded research that needs to continue. So, great job by the study team. The DFS 10% difference is really very large and certainly a practice-changing study. Dr. Shaalan Beg: Yeah, and and sticking with colon cancer, and and this another federally funded study, but this time funded by a Canadian cancer clinical trials group was LBA3510. This is the CHALLENGE study. It's a randomized phase 3 trial of the impact of a structured exercise program on disease-free survival for stage III or high-risk stage II colon cancer. This study got a lot of buzz, a lot of mainstream press coverage, and a lot of discussions on what that means for us for the patients who we're going to be seeing next week in our clinic. What was your takeaway? Dr. Kristen Ciombor: Yeah, this is a really interesting study, and I was so glad to see it presented because this partially answers one of the questions that patients always have for us in clinic, right? You know, once they've completed their standard chemotherapy and surgery, what else can they do to help prevent recurrence? And so we've always known and sort of extrapolated that healthy lifestyle habits are good, but now we have data, particularly in these patients. Most of them were stage III colon cancer patients, those had high-risk stage II cancer. And basically, the goal was to increase their physical activity by at least 10 MET hours per week. So, my big question, of course, as I came into this presentation was, “Okay, what does that mean exactly? How does that translate to real life?” And really what the author presented and explained was that basically most patients could hit their target by adding a 45- to 60-minute brisk walk 3 to 4 times a week. So I think this is very approachable.  Now, in the confines of the study, this was a structured exercise program, so it wasn't just patients doing this on their own. But I do think kind of extrapolating from that, that this is very achievable for most patients. And not only did this prevent recurrence of their prior cancer, but actually the rate of new primary cancer diagnoses, was less, which is really interesting, especially in the breast and prostate cancer. So this was a really interesting, and I think practice-changing study as well, especially given that this is something that most patients can do. Dr. Shaalan Beg: Yeah, and there was a lot of discussion in the hallways after the presentation in terms of how this really changes our existing practice because most folks already recommend exercise as a way for improving outcomes in cancer patients. So we've already been doing that. Now we have some data on how much it can impact the benefit. But there was some discussion about what the actual degree of impact was. There was a drop-off rate in terms of how long folks were able to stick with this exercise regimen. But you've seen this in clinic when someone have their surgery, they have their chemotherapy, they've been so intimately involved with the oncology world, with the oncology practice, and they somehow feel that they're being let loose into this mean, angry world without any guidance and they're looking for something to do. “What more can I do in terms of my lifestyle?” And then here we have very solid data, as solid as can be for an intervention like exercise, showing that there is an impact and you can give a prescription for exercise when someone wraps up their chemotherapy for colon cancer, thanks to the study. Dr. Kristen Ciombor: Yeah. It was a great study. Dr. Shaalan Beg: Moving to gastroesophageal cancer, another late-breaking abstract. This is LBA5. The MATTERHORN trial was a phase 3 trial of durvalumab plus FLOT for resectable GE junction and gastric cancer. And again, another area where immunotherapy has made an impact, and here we're seeing it move closer for earlier-stage disease. What was your take-home for the MATTERHORN trial? Dr. Kristen Ciombor: Yeah, so this study looked at neoadjuvant perioperative durvalumab plus our current standard chemotherapy of FLOT versus placebo plus FLOT. And this was a large study, almost 1,000 patients were randomized. And the primary endpoint was event-free survival, and it was definitely met in favor of the D + FLOT arm, as Dr. Klempner discussed after Dr Janjigian's presentation. I do think there are still some unanswered questions here. Overall survival is not yet mature, so we do have to wait and see how that shakes out. But it's very interesting and kind of is reflective of what, as you said, we're looking at earlier and earlier lines of therapy, particularly with immunotherapy, in these GI cancer spaces. So it makes a lot of sense to test this and and to look at this. So the toxicity was pretty similar to what we would expect. Primary endpoint was met, but again, we'll have to wait and see what the survival data looks like. Dr. Shaalan Beg: Yeah, and in oncology, we know, especially for treatment that does add additional cost, it does add additional potential toxicity that we want to see that overall survival nudged. I did see some polls on social media asking folks whether their practices changed from this, and I think the results were favoring adding durvalumab for this group of patients but understanding that there are caveats to the addition of treatments and the eventual FDA approval in that indication as well. Dr. Kristen Ciombor: Exactly. I completely agree with that. Dr. Shaalan Beg: All right. How about we stick with gastroesophageal cancer? LBA4002 was trastuzumab deruxtecan versus ramucirumab plus paclitaxel for second-line treatment in HER2-positive unresectable or metastatic gastric cancer or GE junction cancer. This was the DESTINY-Gastric04 study. And again, antibody-drug conjugates making a big impact across different diseases. And here we have more data in the HER2-positive gastric cancer space. Your thoughts on this study? Dr. Kristen Ciombor: Yeah, so this is a really important space in gastroesophageal cancer because the HER2 positivity rate is fairly high as compared to some of our other tumor types. So, I do think one of the important things was that patients did have biopsy confirmation of HER2 status, which was very important, and then they were randomized to either T-DXd versus the kind of second-line standard of ramucirumab-paclitaxel. So this was a great practical study and really answers a question that we had for a while in terms of does anti-HER2 therapy in the second-line really impact and improve survival. So we did see a statistically significant improvement favoring T-DXd. I do think it's always important to look at toxicity, though, too. And there was about almost 14% rate of interstitial lung disease, which of course is the most feared toxicity from some of these antibody-drug conjugates, especially T-DXd. So I do think it's important to keep that in mind, but this is definitely a great addition to the armamentarium for these HER2-positive patients. Dr. Shaalan Beg: And pancreas cancer was on the stage after a very long time with a positive clinical trial. This is Abstract 4006. These were preliminary results from a phase 2 study of elraglusib in combination with gemcitabine/nab-paclitaxel versus gemcitabine/nab-paclitaxel alone for previously untreated metastatic pancreas cancer. This is a frontline clinical trial of gemcitabine/nab-paclitaxel plus/minus the study drug. There were other cohorts in this study as well, but they reported the results of their part 3B arm. And great to see some activity in the pancreas space. And your thoughts? Dr. Kristen Ciombor: Yeah, we definitely need better treatments in pancreas cancer. This was a very welcome presentation to see. The elraglusib is an inhibitor of GSK-3beta, and it's thought that that mediates drug resistance and EMT. And so this is, I think, a perfect setting to test this drug. So patients basically were randomized. Patients with metastatic pancreas cancer were randomized 2: 1 to gemcitabine/nab-paclitaxel plus or minus this elraglusib. So, what we saw was that overall survival was better with the addition of this new drug. And overall, not only the 1-year overall survival, but also median overall survival.  The thing that was interesting, though, was that we saw that the overall survival rates were 9.3 months with the combination versus 7.2 months with just gemcitabine/nab-paclitaxel. And that's a little bit lower than we've seen in other studies. So, not sure what was going on there. Was it the patients that were a bit sicker? Was it a patient selection, you know, thing? I'm not really sure how to explain that so much. Also, the toxicity profile was much higher in terms of visual impairment, with over 60% of patients being treated with the combination versus 9% with gemcitabine/nab-paclitaxel. So these were mild, grade 1 and 2, but still something to be cautious about. Dr. Shaalan Beg: And especially with this being a phase 2 trial, making sure that in a larger study we're able to better evaluate the toxicity and see if the control arm in the larger confirmatory study performs differently will be really important before this compound makes it to the clinic in our space. But very exciting to see these kinds of results for pancreas adenocarcinoma. Dr. Kristen Ciombor: Yeah. Dr. Shaalan Beg: We've talked, it seems, a couple of times on this podcast about the BREAKWATER clinical trial. We did hear PFS and updated OS data, updated overall survival data on first-line encorafenib plus cetuximab plus modified FOLFOX6 for BRAF-mutated colorectal cancer. This was LBA3500. And eagerly anticipated results – we have all previously heard the progression-free survival results – but here we heard updated overall survival results, and very well-received study it seemed from the audience that time. So what are your takeaways on the updated results for BREAKWATER? Dr. Kristen Ciombor: In my opinion, this was one of the most practice-confirming studies. As you mentioned, we've already seen some of the preliminary data of BREAKWATER at prior meetings. But really what was particularly impactful for me was the median overall survival with the BREAKWATER regimen. So, again, patients received FOLFOX, encorafenib cetuximab in the first line if they had BRAF-mutated V600E-mutated colorectal cancer. And the median PFS was 12.8 months, which was actually really remarkable in this traditionally very aggressive, poor prognosis subtype of tumors. So, by seeing a median overall survival of 30.3 months was just incredible, in my opinion. Just a few years ago, that was considered the median overall survival for all comers for metastatic colorectal cancer. And we know the median overall survival was more in the less than 12 months range for BRAF. So this was incredibly impactful, and I think should be absolutely practice-changing for anyone who is eligible for this regimen.  I think again, where the practice meets the study is what's kind of important to think about too, how long did patients get FOLFOX, and certainly it adds toxicity to add a BRAF-targeted regimen on top of FOLFOX already. So, one of the other interesting things about the study, though, was that even though it didn't complete treatment, they actually did look at encorafenib/cetuximab alone and in the first line without chemotherapy. And those preliminary results actually looked okay, especially for patients who might not be able to tolerate chemotherapy, which we certainly see in practice. So, overall, definitely more data. And I agree that it's certainly practice-changing. Dr. Shaalan Beg: And it completely, as you mentioned, changes the outlook for a person who's diagnosed with BRAF-mutated metastatic colon cancer today versus even 7 or 8 years ago. Dr. Kristen Ciombor: And we're seeing this over and over in other subtypes too, but how you choose to treat the patient up front really matters. So really giving the right regimen up front is the key here. Dr. Shaalan Beg: And along the same lines, Abstract 3501 wanted to answer the question on whether people with MSI-high metastatic colorectal cancer need double checkpoint inhibitor therapy or is single therapy enough. So this [CheckMate-8HW] study compared nivo plus ipi with nivo alone, nivo monotherapy for MSI-high metastatic colorectal cancer. And we've known that both of these are fairly active regimens, but we also know the chance of immune-related adverse events is significantly higher with combination therapy. So this was a much-needed study for this group of patients. And what were your takeaways here? Dr. Kristen Ciombor: This, of course, has been really nivo-ipi in the first-line MSI-high metastatic colorectal cancer is now a standard of care. And not everybody is eligible for it, and there could be reasons, toxicity reasons, and other things too. But as we've been seeing for the last couple of years, immunotherapy clearly beats chemo in this space. And now looking at doublet versus single immunotherapy treatment in the first line, I think really nivo-ipi does beat out monotherapy. I will say, however, there is a caveat in that we still haven't seen the nivo-ipi versus nivo in the first line. So what has been presented thus far has been across all lines of therapy, and that does muddy the waters a little bit. So definitely looking forward and and we've asked this many times and based on the statistical plan and and what not, you know, we just haven't seen that data yet. But I do think it's becoming increasingly important to consider doublet immunotherapy for these patients as long as there are no contraindications. With the again, with the caveat that we have to have these toxicity discussions in the clinic with patients because many patients can tolerate it, you know, this regimen fairly well, but there can be very severe toxicities. So, I think an informed discussion should really be had with each patient before moving forward. Dr. Shaalan Beg: Yeah, informed decision, making them aware of the potential of real significant toxicities, immune-related toxicities with double therapy. But I am curious in your practice, how often do you see people choosing doublet therapy as frontline? Dr. Kristen Ciombor: So patients are really savvy, and a lot of times they've heard this data before or have come across it in patient advocacy groups and other things, and it's really nice to be able to have that conversation of the risk versus benefit. So I will say not all of my patients choose doublet, and many of them are still cured with immunotherapy monotherapy. So the big question there is, will we ever understand who actually needs the doublet versus who can still be cured or have very good long-term outcomes with just the single agent? And that has not been answered yet. Dr. Shaalan Beg: What a great point. So the last abstract I was hoping we could talk about is POD1UM-303 or the INTERAACT2 subgroup analysis and impact of delayed retifanlimab treatment for patients with squamous cell carcinoma of the anal canal. What were your thoughts here? Dr. Kristen Ciombor: This was a study, actually we saw at ESMO, we saw the primary data at ESMO last year, and this was an update with some exploratory analyses. But this was really an important study because once again, we're looking at immunotherapy in later lines of therapy. That's how we started looking at and investigating immunotherapy, and now we're moving it up and up in the treatment course. So this was a study of carboplatin/paclitaxel plus or minus retifanlimab. Actually it was retifanlimab versus placebo. And it was a positive study, as we heard last year. This actually led to FDA approval of this regimen last month, just before ASCO, and it has now been incorporated in the NCCN guidelines as the preferred first-line option.  So what I thought was important from the additional data presented at ASCO was looking at the different subgroups, it did not appear that patients with liver mets or not had different outcomes. So that was really good to see because sometimes in colon cancer we see that immunotherapy doesn't work as well when patients have liver mets. And interestingly, because we use immunotherapy in anal cancer without any biomarkers, unlike with colon cancer or some of the other tumor types, also the authors looked at PD-L1 status, and it did look like maybe patients did a little bit better if they had higher PD-L1 expression, but patients still could benefit even if they were PD-L1 negative. So that was important, I think, and we will continue to see further data come out from this study. I want to mention also that EA2176 just completed accrual, so that was carbo-taxol plus or minus nivolumab. And so we should be seeing that data sometime soon, which will hopefully also confirm the ongoing role for immunotherapy in the first-line setting for anal cancer. Dr. Shaalan Beg: That was a fantastic review. Thank you, Dr Ciombor. Thanks for sharing your valuable insights with us today on the ASCO Daily News Podcast. Dr. Kristen Ciombor: Thanks for having me here. Dr. Shaalan Beg: And thank you to our listeners for your time today. You will find links to the abstracts discussed today in the transcript of this episode. And if you value the insights that you hear on the podcast, please take a moment to rate, review, and subscribe, wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. More on today’s speakers:   Dr. Shaalan Beg  @ShaalanBeg  Dr. Kristen Ciombor @KristenCiombor Follow ASCO on social media:    @ASCO on Twitter   @ASCO on BlueSky  ASCO on Facebook    ASCO on LinkedIn    Disclosures:   Dr. Shaalan Beg:   Consulting or Advisory Role: Ipsen, Cancer Commons, Foundation Medicine, Science37, Nant Health, Lindus Health Speakers’ Bureau: Sirtex Research Funding (Inst.): Delfi Diagnostics, Universal Diagnostics, Freenome Dr. Kristen Ciombor: Consulting or Advisory Role: Pfizer, Incyte, Exelixis, Bayer, ALX Oncology, Tempus, Agenus, Taiho Oncology, Merck, BeiGene Research Funding (Inst.): Pfizer, Boston Biomedical, MedImmune, Onyx, Bayer, Boehringer Ingelheim, Bristol-Myers Squibb, Merck, Novartis, Incyte, Amgen, Sanofi, Bristol-Myers Squibb, Array BioPharma, Incyte, Daiichi Sankyo, Nucana, Abbvie, Merck, Pfizer/Calthera, Genentech, Seagen, Syndax Travel, Accommodations, Expenses: Incyte, Tempus

Dr. Allison Zibelli and Dr. Rebecca Shatsky discuss advances in breast cancer research that were presented at the 2025 ASCO Annual Meeting, including a potential new standard of care for HER2+ breast cancer, the future of ER+ breast cancer management, and innovations in triple negative breast cancer therapy. Transcript Dr. Allison Zibelli: Hello and welcome to the ASCO Daily News Podcast. I'm Dr. Allison Zibelli, your guest host of the podcast today. I'm an associate professor of medicine and a breast medical oncologist at the Sidney Kimmel Comprehensive Cancer Center at Jefferson Health. There was a substantial amount of exciting breast cancer data presented at the 2025 ASCO Annual Meeting, and I'm delighted to be joined by Dr. Rebecca Shatsky today to discuss some of these key advancements. Dr. Shatsky is an associate professor of medicine at UC San Diego and the head of breast medical oncology at the UC San Diego Health Moores Cancer Center, where she also serves as the director of the Breast Cancer Clinical Trials Program and the Inflammatory and Triple-Negative Breast Cancer Program.  Our full disclosures are available in the transcript of this episode. Dr. Shatsky, it's great to have you on the podcast today. Dr. Rebecca Shatsky: Thanks, Dr. Zibelli. It's wonderful to be here. Dr. Allison Zibelli: So, we’re starting with DESTINY-Breast09, which was trastuzumab deruxtecan and pertuzumab versus our more standard regimen of taxane, trastuzumab pertuzumab for first-line treatment of metastatic HER2-positive breast cancer. Could you tell us a little bit about the study? Dr. Rebecca Shatsky: Yeah, absolutely. So, this was a long-awaited study. When T-DXd, or trastuzumab deruxtecan, really hit the market, a lot of these DESTINY-Breast trials were started around the same time. Now, this was a global, randomized, phase 3 study presented by Dr. Sara Tolaney from the Dana-Farber Cancer Institute of Harvard in Boston. It was assessing essentially T-DXd in the first-line setting for metastatic HER2-positive breast cancer in addition to pertuzumab. And that was randomized against our standard-of-care regimen, which was established over a decade ago by the CLEOPATRA trial, and we've all been using that internationally for at least the past 10 years. So, this was a large trial, and it was one-to-one-to-one of patients getting T-DXd plus pertuzumab, T-DXd alone, or THP, which mostly is used as docetaxel and trastuzumab and pertuzumab every three weeks for six cycles. And this was in over 1,000 patients; it was 1,159 patients with metastatic HER2-positive breast cancer. This was a very interesting trial. It was looking at the use of trastuzumab deruxtecan, but patients were started on this treatment for their first-line metastatic HER2-positive breast cancer with no end date to their T-DXd. So, it was, you know, you were started on T-DXd every 3 weeks until progression. Now, CLEOPATRA is a little bit different than that, though, as we know. So, CLEOPATRA has a taxane plus trastuzumab and pertuzumab. But generally, patients drop the taxane after about six to seven cycles because, as we know, you can't be really on a taxane indefinitely. You get pretty substantial neuropathy as well as cytopenias, other things that end up happening. And so, in general, that regimen has sort of a limited time course for its chemotherapy portion, and the patients maintained after the taxane is dropped on their trastuzumab and their pertuzumab, plus or minus endocrine therapy if the investigator so desires. And the primary endpoint of the trial was progression-free survival by blinded, independent central review (BICR) in the intent-to-treat population. And then it had its other endpoints as overall survival, investigator-assessed progression-free survival, objective response rates, and duration of response, and of course, safety. As far as the results of this trial, so, I think that most of us key opinion leaders in breast oncology were expecting that this was going to be a positive trial. And it surely was. I mean, this is a really, really active drug, especially in HER2-positive disease, of course. So, the DESTINY-Breast03 data really established that, that this is a very effective treatment in HER2-positive metastatic breast cancer. And this trial really, again, showed that. So, there were 383 patients that ended up on the trastuzumab plus deruxtecan plus pertuzumab arm, and 387 got THP, the CLEOPATRA regimen. What was really interesting also to note of this before I go on to the results was that 52% of patients on this trial had de novo metastatic disease. And that's pretty unusual for any kind of metastatic breast cancer trial. It kind of shows you, though, just how aggressive this disease is, that a lot of patients, they present with de novo metastatic disease. It's also reflecting the global nature of this trial where maybe the screening efforts are a little bit less than maybe in the United States, and more patients are presenting as later stage because to have a metastatic breast cancer trial in the United States with 52% de novo metastatic disease doesn't usually happen. But regardless, the disease characteristics were pretty well matched between the two groups. 54% of the patients were triple positive, or you could say hormone-positive because whether they were PR positive or ER positive and PR negative doesn't really matter in this disease. And so, the interim data cutoff was February of this year, of 2025. So, the follow-up so far has been about 29 months, so the data is still really immature, only 38% mature for progression-free survival interim analysis. But what we saw is that T-DXd plus pertuzumab, it really improved progression-free survival. It had a hazard ratio that was pretty phenomenal at 0.56 with a confidence interval that was pretty narrow of 0.44 to 0.71. So, very highly statistically significant data here. The progression-free survival was consistent across all subgroups. Overall survival, very much immature at this time, but of course, the trend is towards an overall survival benefit for the T-DXd group. The median durable response with T-DXd plus pertuzumab exceeded 3 years. Now, importantly, though, I want to stress this, is grade 3 or above treatment-emergent adverse events occurred in both subgroups pretty equally. But there were 2 deaths in the T-DXd group due to interstitial lung disease. And there was a 12.1% adjudicated drug-induced interstitial lung disease/pneumonitis event rate in the T-DXd group and only 1%, and it was grade 1-2, in the THP group. So, that's really the caveat of this therapy, is we know that a percentage of patients are going to get interstitial lung disease, and that some may have very serious adverse events from it. So, that's always something I keep in the back of my mind when I treat patients with T-DXd. And so, overall, the conclusions of the trial were pretty much a slam dunk. T-DXd plus pertuzumab, it had a highly statistically significant and clinically meaningful improvement in progression-free survival versus the CLEOPATRA regimen. And that was across all subgroups for first-line metastatic HER2-positive breast cancer here. And so, yeah, the data was pretty impressive. Just to go into the overall response rate, because that's always super important as well, you had 85.1% of patients having a confirmed overall RECIST response rate in the T-DXd plus pertuzumab group and a 78.6 in the CLEOPATRA group. The complete CR rate, complete response was 15.1% in the T-DXd group and 8.5 in the CLEOPATRA regimen. And it was really an effective regimen in this group, of course. Dr. Allison Zibelli: So, the investigators say at the end of their abstract that this is the new standard of care. Would you agree with that statement? Dr. Rebecca Shatsky: Yeah, that was a bold statement to make because I would say in the United States, not necessarily at the moment because the quality of life here, you have to think really hard about. Because one thing that's really important about the DESTINY-Breast09 data is that this was very much an international trial, and in many of the countries where patients enrolled on this, they were not able to access T-DXd off trial. And so, for them, this means T-DXd now or potentially never. And so, that is a really big difference whereas internationally, that may mean standard of care. However, in the US, patients have no issues accessing T-DXd in the second- or third-line settings. And right now, it's the standard of care in the second line in the United States, with all patients basically getting this second-line therapy except for some unique patients where they may be doing a PATINA trial regimen, which we saw at San Antonio Breast Cancer in 2024 of the triple-positive patients getting hormonal therapy plus palbociclib, which had a really great durable response. That was super impressive as well. Or there is the patient that the investigator can pick KADCYLA because the patient really wants to preserve their hair or maybe it's more indolent disease. But the quality of life on T-DXd indefinitely in the first-line setting is a big deal because, again, that CLEOPATRA regimen allows patients to drop their chemotherapy component about five to six months in. And with this, you're on a drug that feels very chemo-heavy indefinitely. And so, I think there's a lot more to investigate as far as what we're going to do with this data in the United States because it's a lot to commit a patient in the first-line metastatic setting. These de novo metastatic patients, some of them may be cured, honestly, on the HER2-targeting regimen. That's something we see these days. Dr. Allison Zibelli: So, very interesting trial. I'm sure we'll be talking about this for a long time.  So, let's move on to SERENA-6, which was, I thought, a very interesting trial. This trial took patients with ER positive, advanced breast cancer after six months on an AI (aromatase inhibitor) and a CDK4/6 inhibitor. They did ctDNA every two to three months, and when they saw an ESR1 mutation emerge, they changed half of the patients to camizestrant plus CDK4/6 and kept the other half on the AI plus CDK4/6. Can you talk about that trial a little bit, please? Dr. Rebecca Shatsky: Yeah, so this was a big trial at ASCO25. This was presented as a Plenary Session. So, this was camizestrant plus a CDK4/6 inhibitor, and it could have been any of the three, so palbo, ribo, or abemaciclib in the first-line metastatic hormone-positive population, and patients were on an AI with that. They were, interestingly, tested by ctDNA at baseline to see if they had an ESR1 mutation. So, that was an interesting feature of this trial. But patients had to have already been on their CDK4/6 inhibitor plus AI for at least 6 months to enroll. And then, as you mentioned, they got ctDNA testing every 2 to 3 months. This was also a phase 3, double-blind, international trial. And I do want to highlight again, international here, because that's important when we're considering some of this data in the U.S. because it influences some of the results. So, this was presented by Dr. Nick Turner of the Royal Marsden in the UK. So, just a little bit of background for our listeners on ESR1 mutations and why they're important. This is the most common, basically, acquired resistance mutation to patients being treated with aromatase inhibitors. We know that treatment with aromatase inhibitors can induce this. It makes a conformational change in the estrogen receptor that makes the estrogen receptor constitutively active, which allows the cell to signal despite the influence of the aromatase inhibitor to decrease the estrogen production so that the ligand binding doesn't matter as much as far as the cell signaling and transcription is concerned. And camizestrant, you know, as an oral SERD, just to explain that a little bit too; these are estrogen receptor degraders. The first-in-class of a selective estrogen receptor degrader to make it to market was fulvestrant. And that's really been our standard-of-care estrogen degrader for the past 25 years, almost 25 years. And so, a lot of us are just looking for some of these oral SERDs to replace that. But regardless, they do tend to work in the ESR1-mutated population. And we know that patients on aromatase inhibitors, the estimates of patients developing an ESR1 mutation, depending on which study you look at, somewhere between 30% to 50% overall, patients will develop this mutation with hormone-positive metastatic breast cancer. There is a small percentage of patients that have these at baseline without even treatment of an aromatase inhibitor. The estimates of that are somewhere between 0.5 and up to 5%, depending on the trial you look at and the population. But regardless, there is a chance someone on their CDK4/6 inhibitor plus AI at 6 months’ time course could have had an ESR1 mutation at that time. But anyway, so they got this ctDNA every 2 to 3 months, and once they were found to develop an ESR1 mutation, the patients were then switched to the oral SERD. AstraZeneca's version of the oral SERD is camizestrant, 75 mg daily. And then their type of CDK4/6 inhibitor was maintained, so they didn't switch the brand of their CDK4/6 inhibitor, importantly. And that was looked at then for progression-free survival, but these were patients with measurable disease by RECIST version 1.1. And the data cut off here was November of 2024. This was a big trial, you know, and I think that that's influential here because this was 3,256 patients, and that's a lot of patients. So, they were all eligible. And then 315 patients ended up being randomized to switch to camizestrant upon presence of that ESR1 mutation. So, that was 157 patients. And then the other half, so they were randomized 1:1, they continued on their AI without switching to an oral SERD. That was 158 patients. They were matched pretty well. And so, their baseline characteristics, you know, the two subgroups was good. But this was highly statistically significant data. I'm not going to diminish that in any way. Your hazard ratio was 0.44. Highly statistically significant confidence intervals. And you had a median progression-free survival in those that switched to camizestrant of 16 months, and then the non-switchers was 9.2 months. So, the progression-free survival benefit there was also consistent across the subgroups. And so, you had at 12 months, the PFS rate was 60.7% for the non-treatment group and 33.4% in the treatment group. What's interesting, though, is we don't have overall survival data. This is really immature, only 12% mature as far as overall survival. And again, because this was an international trial and patients in other countries right now do not have the access to oral SERDs that the United States does, the crossover rate, they were not allowed to crossover, and so, a very few patients, when we look at progression-free survival 2 and ultimately overall survival, were able to access an oral SERD in the off-trial here and in the non-treatment group. And so, that's really important as far as we look at these results. Adverse events were pretty minimal. These are very safe drugs, camizestrant and all the other oral SERDs. They have some mild toxicities. Camizestrant is known for something weird, which is called photopsia, which is some flashing lights in the periphery of the eye, but it doesn't seem to have any serious clinical significance that we know of. It has a little bit of bradycardia, but it's otherwise really well tolerated. You know, I hate to say that because that's very subjective, right? I'm not the one taking the drug. But it doesn't have any serious adverse events that would cause discontinuation. And that's really what we saw in the trial. The discontinuation rates were really low. But overall, I mean, this was a positive trial. SERENA-6 showed that switching to camizestrant at the first sign of an ESR1 mutation on CDK4/6 inhibitor plus AI improved progression-free survival. That's all we can really say from it right now. Dr. Allison Zibelli: So, let's move on to ASCENT-04, which was a bit more straightforward. Sacituzumab govitecan plus pembrolizumab versus chemotherapy plus pembrolizumab in PD-L1-positive, triple-negative breast cancer. Could you talk about that study? Dr. Rebecca Shatsky: Yeah, so this was also presented by the lovely Sara Tolaney from Dana-Farber. And this study made me really excited. And maybe that's because I'm a triple-negative breast cancer person. I mean, not to say that I don't treat hundreds of patients with hormone- positive, but our unmet needs in triple negative are huge because this is a disease where you have got to throw your best available therapy at it as soon as you can to improve survival because survival is so poor in this disease. The average survival with metastatic triple-negative breast cancer in the United States is still 13-18 months, and that's terrible. And so, for full disclosure, I did have this trial open at my site. I was one of the site PIs. I'm not the global PI of the study, obviously. So, what this study was was for patients who had had at least a progression-free survival of 6 months after their curative intent therapy or de novo metastatic disease. They were PD-L1 positive as assessed by the Dako 22C3 assay of greater than or equal to a CPS score of 10. So, that's what the KEYNOTE-355 trial was based on as well. So, standard definition of PD-L1 positive in breast cancer here. And basically, these patients were randomized 1:1 to either their sacituzumab govitecan plus pembrolizumab, day 1 they got both therapies, and then day 8 just the saci, as is standard for sacituzumab. And then the other group got the KEYNOTE-355 regimen. So, that is pembrolizumab with – your options are carbogem there, paclitaxel or nab-paclitaxel. And it's up to investigator's decision which upon those they decided. They followed these patients for disease progression or unacceptable toxicity. It was really an impressive trial in my opinion because we know already that this didn't just improve progression-free survival, because survival is so poor in this disease, of course, we know that it improved overall survival. It's trending towards that very much, and I think that's going to be shown immediately. And then the objective response rates were better, which is key in this disease because in the first-line setting, you've got a lot of people who, especially your relapsed TNBC that don't respond to anything. And you lose a ton of patients even in the first-line setting in this disease. And so, this was 222 patients to chemotherapy and pembro and 221 to sacituzumab plus pembro. Median follow-up has only been 14 months, so it's still super early here. Hazard ratio so far of progression-free survival is 0.65, highly statistically significant, narrow confidence intervals. And so, the median duration of response here for the saci group was 16.5 months versus 9.2 months. So, you're getting a 7-month progression-free survival benefit here, which in triple negative is pretty fantastic. I mean, this reminds me of when we saw the ASCENT data originally come out for sacituzumab, and we were all just so happy that we had this tool now that doubled progression-free and overall survival and made such a difference in this really horrible disease where patients do poorly. So, OS is technically immature here, but it's really trending very heavily towards improvement in overall survival. Importantly, the treatment-related adverse events in this, I mean, we know sacituzumab causes neutropenia, people who are experienced with this drug know how to manage it at this point. There wasn't any really unexpected treatment-related adverse events. You get some people with sacituzumab who have diarrhea. It's usually pretty manageable with some Imodium. So, it was cytopenias predominantly in this disease in this population that were highlighted as far as adverse events. But I'm going to be honest, like I was surprised that this wasn't the plenary over the SERENA-6 data because this, in my mind, there we have a practice-changing trial. I will immediately be trying to use this in my PD-L1 population because, to be honest, as a triple-negative breast cancer clinical specialist, when I get a patient with metastatic triple-negative breast cancer who's PD-L1 positive, I think, "Oh, thank God," because we know that part of the disease just does better in general. But now I have something that really could give them a durable response for much longer than I ever thought possible when I started really heavily treating this disease. And so, this was immediately practice-changing for me. Dr. Allison Zibelli: I think that it's pretty clear that this is at least an option, if not the option, for this group of patients. Dr. Rebecca Shatsky: Yeah, the duration of responses here was – it’s just really important because, I mean, I do think this will make people live longer. Dr. Allison Zibelli: So, moving on to the final study that we're going to discuss today, neoCARHP (LBA500), which was neoadjuvant taxane plus trastuzumab, pertuzumab, plus or minus carbo(platin) in HER2-positive early breast cancer. I think this is a study a lot of us have been waiting for. What was the design and the results of this trial? Dr. Rebecca Shatsky: I was really excited about this as well because I'm one of those people that was waiting for this. This is a Chinese trial, so that is something to take note of. It wasn't an international trial, but it was a de-escalation trial which had become really popular in HER2-positive therapy because we know that we're overtreating HER2-positive breast cancer in a lot of patients. A lot of patients we're throwing the kitchen sink at it when maybe that is not necessary, and we can really de-escalate and try to personalize therapy a little bit better because these patients tend to do well. So, the standard of care, of course, in HER2-positive curative intent breast cancer with tumors that are greater than 2 cm is to give them the TCHP regimen, which is docetaxel, carboplatin, trastuzumab, and pertuzumab. And that was sort of established by several trials in the NeoSphere trial, and now it's been repeated in a lot of different studies as well. And so, that's really the standard of care that most people in the United States use for HER2-positive curative intent breast cancer. This was a trial to de-escalate the carboplatin, which I was super excited about because many of us who treat this disease a lot think carbo is the least important part of the therapy you're giving there. We don't really know that it's necessary. We've just been doing it for a long time, and we know that it adds a significant amount of toxicity. It causes thrombocytopenia, it causes severe nausea, really bad cytopenias that can be difficult in the last few cycles of this to manage. So, this trial was created. It randomized patients one to one with stage 2 and 3 HER2-positive breast cancer to either get THP, a taxane, pertuzumab, trastuzumab, similar to the what we do in first-line metastatic HER2-positive versus the whole TCHP with a carboplatin AUC of 6, which is what's pretty standard. And it was a non-inferiority trial, so important there. It wasn't to establish superiority of this regimen, which none of us, I think, were looking for it to. And it was a modified intent-to-treat population. And so, all patients got at least one cycle of this to be assessed as a standard for an intent-to-treat trial. And so, they assumed a pCR rate of about 62.8% for both groups. And, of course, it included both HER2-positive triple positives and ER negatives, which are, you know, a bit different diseases, to be honest, but we all kind of categorize them and treat them the same. And so, this trial was powered appropriately to detect a non-inferiority difference. And so, we had about 380 patients treated on both arms, and there was an absolute difference of only 1.8% of those treated with carbo versus those without. Which was fantastic because you really realized that de-escalation here may be something we can really do. And so, the patients who got, of course, the taxane regimen had fewer adverse events. They had way fewer grade 3 and 4 adverse events than the THP group. No treatment-associated deaths occur, which is pretty standard for- this is a pretty safe regimen, but it causes a lot of hospitalizations due to diarrhea, due to cytopenias, and neutropenic fever, of course. And so, I thought that this was something that I could potentially enact, you know, and be practice-changing. It's hard to say that when it's a trial that was only done in China, so it's not necessarily the United States population always. But I think for patients moving forward, especially those with, say, a 2.5 cm tumor, you know, node negative, those, I'd feel pretty comfortable not giving them the carboplatin here. Notes that I want to make about this population is that the majority were stage 2 and not stage 3. They weren't necessarily your inflammatory HER2-positive breast cancer patients. And that the taxane that was utilized in the trial is a little different than what we use in the United States. The patients were allowed to get nab-paclitaxel, which we don't have FDA approval for in the first-line curative intent setting for HER2-positive breast cancer in the United States. So, a lot of them got abraxane, and then they also got paclitaxel. We tend to use docetaxel every 3 weeks in the United States. So, just to point out that difference. We don't really know if that's important or not, but it's just a little bit different to the population we standardly treat. Dr. Allison Zibelli: So, are there patients that you would still give TCHP to? Dr. Rebecca Shatsky: Yeah, great question. I've been asked that a lot in the past like week since ASCO. I'd say in my inflammatory breast cancer patients, that's a group I do tend to sometimes throw the kitchen sink at. Now, I don't actually use AC in those because I know that that was the concern, but I think the TRAIN-2 trial really showed us you don't need to use Adriamycin in HER2-positive disease unless it's like refractory. So, I don't know that I would throw this on my stage 3C or inflammatory breast cancer patients yet because the majority of this were not stage 3. So, in your really highly lymph node positive patients, I'm a little bit hesitant to de-escalate them from the start. This is more of a like, if there's serious toxicity concerns, dropping carbo is absolutely fine here. Dr. Allison Zibelli: All right, great.  Thank you, Dr. Shatsky, for sharing your valuable insights with us on the ASCO Daily News Podcast today. Dr. Rebecca Shatsky: Thanks so much, Dr. Zibelli and ASCO Daily News. I really want to thank you for inviting me to talk about this today. It was really fun, and I hope you find my opinions on some of this valuable. And so, I just want to thank everybody and my listeners as well. Dr. Allison Zibelli: And thank you to our listeners for joining us today. You'll find the links to all the abstracts discussed today in the transcript of this episode. Finally, if you like this podcast and you learn things from it, please take a moment to rate, review, and describe because it helps other people find us wherever you get your podcasts. Thank you again. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. More on today’s speakers Dr. Allison Zibelli Dr. Rebecca Shatsky @Dr_RShatsky Follow ASCO on social media:  @ASCO on Twitter  @ASCO on Bluesky  ASCO on Facebook  ASCO on LinkedIn   Disclosures: Dr. Allison Zibelli: No relationships to disclose Dr. Rebecca Shatsky: Consulting or Advisory Role: Stemline, Astra Zeneca, Endeavor BioMedicines, Lilly, Novartis, TEMPUS, Guardant Health, Daiichi Sankyo/Astra Zeneca, Pfizer Research Funding (Inst.): OBI Pharma, Astra Zeneca, Greenwich LifeSciences, Briacell, Gilead, OnKure, QuantumLeap Health, Stemline Therapeutics, Regor Therapeutics, Greenwich LifeSciences, Alterome Therapeutics  

Dr. John Sweetenham and Dr. Marc Braunstein highlight top research on hematologic malignancies from the 2025 ASCO Annual Meeting, including abstracts on newly diagnosed chronic phase CML, relapsed B-cell lymphoma, and multiple myeloma. Transcript Dr. John Sweetenham: Hello, and welcome to the ASCO Daily News Podcast. I'm your host, Dr. John Sweetenham. On today's episode, we'll be discussing promising advances in newly diagnosed chronic phase CML, relapsed B-cell lymphoma, multiple myeloma, and other hematologic malignancies that were presented at the 2025 ASCO Annual Meeting. Joining me for this discussion is Dr. Marc Braunstein, a hematologist and oncologist at the NYU Perlmutter Cancer Center. Our full disclosures are available in the transcript of this episode.  Marc, there were some great studies in the heme space at this year's Annual Meeting, and it's great to have you back on the podcast to highlight some of these advances. Dr. Marc Braunstein: Yes, I agree, John, and thank you so much for inviting me again. It's great to be here.  Dr. John Sweetenham: Let's start out with Abstract 6501. This was a study that reported on the primary endpoint results of the phase 3B ASC4START trial, which assessed asciminib versus nilotinib in newly diagnosed chronic phase CML. And the primary endpoint of this, as you know, was time to treatment discontinuation because of adverse events. Can you give us your insights into this study? Dr. Marc Braunstein: Absolutely. So, like you mentioned, you know, asciminib is an allosteric inhibitor of the BCR-ABL kinase that has activity in CML, and that includes patients with the T315I mutation that confers resistance to first- and second-generation TKIs. So, the ASC4FIRST study, which was published last year in the New England Journal of Medicine, showed superior efficacy of asciminib compared to investigator-selected first- or second-generation TKIs, actually leading to the FDA approval of asciminib in first-line CML. So, the authors of that study presented data at this year's ASCO meeting from the phase 3 ASC4START comparing safety and time to discontinuation due to adverse events of asciminib versus nilotinib, a second-generation TKI. So, 568 patients with newly diagnosed CML were randomized one-to-one to once-daily asciminib or twice-daily nilotinib. So, at a median follow-up of 9.7 months, about 11% in the asciminib group and 17% in the nilotinib group discontinued treatment, with significantly fewer discontinuations with asciminib due to adverse events. There was also a secondary endpoint of major molecular response, which was also better with asciminib. For example, the MR 4.5, which is a deep response, was 2.5% versus 0.4% favoring asciminib by week 12. So, I think in conclusion, these results build on the ASC4FIRST study, making the case for the superior safety and efficacy of asciminib versus other first- or second-generation TKIs in newly diagnosed CML. Dr. John Sweetenham: Thanks, Marc. Do you think this is going to change practice? Dr. Marc Braunstein: I think so. I think there are still some questions to be answered, such as what resistance mutations occur after first-line treatment with asciminib. But I think the sum of these studies really make the case for using asciminib upfront in CML. Dr. John Sweetenham: Okay, great. Thank you. And let's move on to our second abstract. This was Abstract 7015 and was reported from Mass General Hospital. And this was a study in patients with relapsed and refractory diffuse large B-cell lymphoma and reported the 2-year results of the so-called STARGLO study. This is a comparison of glofitamab, a T-cell engaging bispecific antibody, with gemcitabine and oxaliplatin in this group of patients. Can you tell us a little bit about your impressions of this study? Dr. Marc Braunstein: Absolutely. So just for background, the treatment landscape for relapsed/refractory large B-cell lymphoma is expanding, now with two bispecific antibodies targeting CD20 that are approved after two or more lines of therapy. Among these, glofitamab was approved in 2023 based on phase 2 data showing an objective response rate of 52%, with 39% complete responses in relapsed/refractory large B-cell lymphoma patients after a median of three prior lines of therapy. Distinguishing glofitamab from epcoritamab, the other approved bispecific, glofitamab was given for 12 cycles and then stopped. Additionally, when combined with gemcitabine and oxaliplatin in the phase 3 STARGLO study, there was significantly improved overall survival compared to rituximab plus gemcitabine and oxaliplatin in transplant-ineligible relapsed/refractory large B-cell lymphoma patients at a median follow-up of 11 months.  The authors of that study published last year in Lancet now present at ASCO this year the 2-year follow-up of the STARGLO study. Two hundred and seventy-four patients with a median of one prior line of therapy were randomized two-to-one to glofitamab plus GemOx versus rituximab plus GemOx, with the primary endpoint of overall survival. Here, the median overall survival was not reached versus 13.5 months, with a median PFS also significantly improved at about 14 months versus 4 months in the control. CRS of note in the glofitamab arm was mostly grade 1 or 2, with only about 2.3% grade 3 events. And three of the four patients had grade 1 or 2 neurotoxicity. So, John, putting this into context, I think it's encouraging that we now have randomized data showing the superiority of a bispecific plus chemotherapy over rituximab plus chemotherapy in transplant-ineligible patients. And while only 8% of the patients in the STARGLO study had prior anti-CD19 CAR T-cell therapy, I think this regimen could be considered in those patients who are ineligible for transplant or CAR T-cell therapy. Dr. John Sweetenham: Yeah, I agree. I think a couple of other compelling numbers to me were the fact that around 55% of these patients were alive at 2 years in the group who'd received glofitamab, and that almost 90% of those having that arm of the study who had a CR at the end of treatment were alive at 12 months. So, clearly, it's an active agent and also a kind of great off-the-shelf fixed-duration alternative in these relapsed and refractory patients. Dr. Marc Braunstein: I agree, and I would also note that the phase 3 SKYGLO study is looking at glofitamab plus Pola-R-CHP versus Pola-R-CHP alone. So, we may even be using these eventually in the first-line setting. Dr. John Sweetenham: Absolutely. Let's stay on the theme of diffuse large B-cell lymphoma and look at one other abstract in that space, which was Abstract 7000. This was a study from the HOVON group in the Netherlands, which looked at the prospective validation of end-of-treatment circulating tumor DNA in the context of a national randomized trial. What are your thoughts on this? Dr. Marc Braunstein: So, non-invasive liquid biopsies to detect and monitor cancers via circulating tumor-derived DNA or ctDNA, you know, is really emerging as a valuable tool in both solid and liquid tumors to understand disease biology, and also for drug development. So, to date, the most established application of ctDNA in lymphoma, I would say, is really for monitoring of minimal residual disease. So, in this correlative study by Steven Wang and colleagues in the HOVON group, they evaluated the prognostic significance of MRD status as assessed by ctDNA following first-line treatment with curative intent with either R-CHOP or dose-adjusted R-EPOCH. At the end of treatment, encouragingly, 76% of patients were MRD-negative, and 24% were MRD-positive. Now, of note, MRD-positive status at the end of treatment predicted inferior progression-free survival at 2 years, with only 28% of patients who are MRD-positive being progression-free versus 88% who are MRD-negative. And in fact, all the patients who failed to achieve a complete response after first-line treatment and were MRD-positive ultimately relapsed. So, circulating tumor cells are rarely found in large B-cell lymphomas, and so this study really builds on accumulating data that ctDNA has clinical value to detect residual disease with a non-invasive approach. So, there are many implications of how we could potentially use this to detect early signs of relapse, to potentially escalate treatment for consolidation if patients remain MRD-positive. So, I think this will eventually become utilized in clinical practice. Dr. John Sweetenham: Yeah, I agree. I think it's interesting that it provided an independent assessment of response, which was independent, in fact, of the results of PET-CT scanning and so on, which I think was very interesting to me. And the authors of the abstract actually commented in their presentation that they think this should be integrated as part of the standard response assessment now for patients with large B-cell lymphoma. Would you agree with that? Dr. Marc Braunstein: I would. For one thing, it allows repeated sampling. It's a non-invasive approach; it doesn't necessarily require a bone marrow biopsy, and it may have more sensitivity than conventional response measures. So, I think having a standardized system to assess ctDNA will be helpful, and definitely, I think this will be a valuable biomarker of disease response. Dr. John Sweetenham: Okay, great. Thanks. We're going to change gear again now, and we're going to highlight two abstracts in the multiple myeloma space. The first one of these is Abstract 7507. And this abstract reported on the long-term results of the CARTITUDE study for patients with relapsed and refractory multiple myeloma. What are your comments on this presentation? Dr. Marc Braunstein: So, this study actually got a lot of press, and I've already had multiple patients asking me about CAR T-cells as a result. Just as some background, CAR T-cells targeting BCMA, which is pretty much universally expressed on malignant plasma cells in myeloma, have really shown remarkable responses, especially in heavily pretreated patients, showing superior progression-free survival in both later and earlier phases of the disease, including in randomized studies in patients with second-line or beyond. So, the CARTITUDE-1 was really the original Phase 1/2 study of ciltacabtagene autoleucel, one of the two approved anti-BCMA CAR T-cell products, which was investigated in patients with a median of six to seven prior lines of therapy. So, these were patients who were pretty heavily pretreated. So, in the study presented by Voorhees at this year's ASCO meeting, this was the long-term follow-up at a median of 5 years from the one-time CAR infusion in these patients with a median of five prior lines of therapy. And remarkably, of the 97 patients, 33% remained progression-free at 5 years plus, without needing any further myeloma treatment during that time. And among those 33% of patients, 23% had high-risk cytogenetics, which we know are notoriously difficult to achieve responses in. What was interesting that they presented as correlative studies was there were some biomarkers that were distinguishing the patients who had the long PFS, including enrichment of more naive T-cells in the product, lower neutrophil-to-T-cell ratio, higher hemoglobin and platelets at baseline, and higher CAR T-cell levels relative to soluble BCMA levels. And the fact that they reported a median overall survival of 61 months in these really heavily pretreated patients, I think these data are impressive. I think we're going to continue to be using CAR T even earlier in the disease status than fifth or sixth line, as it was studied in CARTITUDE-1. There are even ongoing studies looking at first-line treatment with CAR T-cells. Dr. John Sweetenham: So, do you think that those 33% of patients who are disease-free at 5 years, do you think any of those are cured?  Dr. Marc Braunstein: That was one of the headlines in the press. I think if we're going to discuss things like "operational cures," where we're transforming myeloma into really a chronic disease, where patients can live practically a normal life expectancy, I think the measure of 5 years, especially in this population that was explored in CARTITUDE-1, I think we can call that close to a cure. Dr. John Sweetenham: Okay. Well, thank you. Exciting data, for sure. We're going to conclude today with another abstract in the multiple myeloma space. And this was Abstract 7500, which looked at an MRD, minimal residual disease-driven strategy following induction and transplant-eligible newly diagnosed multiple myeloma patients and reported on the primary endpoints of the phase 3 MIDAS trial. Can you walk us through this one, Marc? Dr. Marc Braunstein: Absolutely. It is a bit more complicated than the prior one we discussed because this is a randomized study with four arms. So, I'll start by saying that anti-CD38-based quadruplet regimens continue to show superior outcomes in both transplant-eligible and -ineligible newly diagnosed multiple myeloma patients. The MIDAS study mentioned is an open-label phase 3 trial with four arms in transplant-eligible newly diagnosed myeloma patients.  And initially, these patients were all treated with quadruplet therapy with the anti-CD38 antibody isatuximab combined with carfilzomib, lenalidomide, and dexamethasone in 718 newly diagnosed myeloma patients. So, they received the quadruplet regimen for six cycles and then were randomized based on their MRD status at 10 to the negative fifth following six cycles of induction. And that first randomization, if they were MRD-negative, was to either consolidation with six more cycles of the quadruplet regimen or transplant, autologous transplant, plus two cycles additionally of the quadruplet regimen. And both arms were followed by lenalidomide maintenance. The primary endpoint was MRD negativity at 10 to the negative sixth prior to entering the lenalidomide maintenance component. And in addition, the patients who were MRD-positive after induction were randomized to transplant plus two cycles of consolidation or a tandem autologous transplant. So, the median follow-up of the study was about 16 months, and the pre-maintenance rate of MRD negativity was high, between 84 to 86% between the two arms who were MRD-negative, which was not significantly different. And as far as the 233 patients who were MRD-positive, the pre-maintenance MRD negativity was also not significantly different at 40% for those who received autologous transplant, and 32% who received a tandem transplant. So, there's a lot of debate in the myeloma field about the evolving role of autologous transplant and whether transplant still plays a significant role in patients who are either MRD-negative after induction or who have deep remissions and are of standard risk. So, I think these data suggest that patients who are MRD-negative after induction with a quadruplet regimen studied here, which was Isa-KRd, plus consolidation, may possibly be able to forego consolidation with autologous transplant. And likewise, for those patients who are MRD-positive after induction, tandem transplant didn't seem to provide much of a benefit compared to single transplant, which is consistent with prior studies such as the StaMINA study. Dr. John Sweetenham: So, where do you think this leaves us, Marc? Are we going to need more studies before we have any definitive guidance on whether an autologous transplant is still appropriate for those patients who are MRD-negative? Dr. Marc Braunstein: Well, as clinicians, we want to do what's best for our patient. And in myeloma, the best we can do is to get as deep remissions as possible, meaning MRD negativity. And so, I think it's clear from the MIDAS study and others that quadruplet regimens provide the deepest remissions when given upfront. We can debate the role of autologous transplant. I think certainly the role of tandem autologous transplant is fading. But as far as a single autologous transplant as consolidation, I think it's reasonable as a goal to try to achieve MRD negativity after the transplant, especially for patients who remain MRD-positive after induction. Dr. John Sweetenham: Okay, great. Marc, thanks as always for sharing your insights on the heme malignancies studies from the ASCO meeting this year and for joining us on the ASCO Daily News Podcast. Always appreciate hearing your thoughtful and balanced input on these. Dr. Marc Braunstein: My pleasure. Thank you, John. Dr. John Sweetenham: And thank you to our listeners for joining us today. You'll find links to the abstracts discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts.   Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions.  Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.   Find out more about today’s guest:  Dr. John Sweetenham Dr. Marc Braunstein   @docbraunstein     Follow ASCO on social media:   @ASCO on Twitter  ASCO on Bluesky  ASCO on Facebook   ASCO on LinkedIn     Disclosures:  Dr. John Sweetenham:  Consulting or Advisory Role: EMA Wellness  Dr. Marc Braunstein:  Consulting or Advisory Role: Pfizer, Bristol-Myers Squibb/Celgene, Adaptive Biotechnologies, GlaxoSmithKline, ADC Therapeutics, Janssen Oncology, Abbvie, Guidepoint Global, Epizyme, Sanofi, CTI BioPharma Corp  Speakers’ Bureau: Janssen Oncology  Research Funding (Institution): Janssen, Celgene/BMS

Dr. John Sweetenham and Dr. Erika Hamilton highlight key abstracts that were presented at ASCO25, including advances in breast and pancreatic cancers as well as remarkable data from the use of structured exercise programs in cancer care. Transcript Dr. Sweetenham: Hello, and welcome to the ASCO Daily News Podcast. I’m your host, Dr. John Sweetenham. Today, we’ll be discussing some of the key advances and novel approaches in cancer care that were presented at the 2025 ASCO Annual Meeting. I’m delighted to be joined again by the chair of the Meeting’s Scientific Program, Dr. Erika Hamilton. She is a medical oncologist and director of breast cancer and gynecologic cancer research at the Sarah Cannon Research Institute in Nashville, Tennessee.  Our full disclosures are available in the transcript of this episode. Dr. Hamilton, congratulations on a fantastic meeting. From the practice-changing science to the world-renowned speakers at this year’s Meeting, ASCO25 really reflected the amazing progress we’re seeing in oncology today and the enormous opportunities that lie ahead of us. And thanks for coming back on to the podcast today to discuss some of these advances. Dr. Hamilton: Thanks, Dr. Sweetenham. I'm happy to join you today. It really was an impactful ASCO Annual Meeting. I probably am biased, but some great research was presented this year, and I heard lots of great conversations happening while we were there. Dr. Sweetenham: Yeah, absolutely. There was a lot of buzz, as well as a lot of media buzz around the meeting this year, and I think that’s probably a good place to start. So I’d like to dive into abstract number LBA3510. This was the CHALLENGE trial, which created a lot of buzz at the meeting and subsequently in the media. This is the study that was led by the NCI Canada Clinical Trials Group, which was the first randomized phase 3 trial in patients with stage III and high-risk stage II colon cancer, which demonstrated that a post-treatment structured exercise program is both feasible and effective in improving disease-free survival in this patient group. The study was performed over a long period of time and in many respects is quite remarkable. So, I wonder if you could give us your thoughts about this study and whether you think that this means that our futures are going to be full of structured exercise programs for those patients who may benefit. Dr. Hamilton: It’s a fantastic question. I think that this abstract did create a lot of buzz. We were very excited when we read it. It was highlighted in one of the Clinical Science Symposium sessions. But briefly, this was a phase 3 randomized trial. It was conducted at 55 centers, so really a broad experience, and patients that had resected colon cancer who completed adjuvant therapy were allowed to participate. There were essentially 2 groups: a structured exercise program, called ‘the exercise group,’ or health education materials alone, so that was called just ‘the health education group.’ And this was a 3-year intervention, so very high quality. The primary end point, as you mentioned, was disease-free survival. This actually accrued from 2009 to 2024, so quite a lift, and almost 900 patients underwent randomization to the exercise group or the health education group. And at almost 8 years of follow-up, we saw that the disease-free survival was significantly longer in the exercise group than the health education group. This was essentially 80.3% of patients were disease-free in exercise and 73.9% in the health education group. So a difference of over 6 percentage points, which, you know, at least in the breast cancer world, we make decisions about whether to do chemotherapy or not based on these kind of data. We also looked at overall survival in the exercise group and health education group, and the 8-year overall survival was 90.3% in the exercise group and 83.2% in the health education group. So this was a difference of 7.1%. Still statistically significant. I think this was really a fantastic effort over more than a decade at over 50 institutions with almost 900 patients, really done in a very systematic, high-intervention way that showed a fantastic result. Absolutely generalizable for patients with colon cancer. We have hints in other cancers that this is beneficial, and frankly, for our patients for other comorbidities, such as cardiovascular, etc., I really think that this is an abstract that deserved the press that it received. Dr. Sweetenham: Yeah, absolutely, and it is going to be very interesting, I think, over the next 2 or 3 years to see how much impact this particular study might have on programs across the country and across the world actually, in terms of what they do in this kind of adjuvant setting for structured exercise. Dr. Hamilton: Absolutely.  So let’s move on to Abstract 3006. This was an NCI-led effort comparing genomic testing using ctDNA and tissue from patients with less common cancers who were enrolled in but not eligible for a treatment arm of the NCI-MATCH trial. Tell us about your takeaways from this study. Dr. Sweetenham: Yeah, so I thought this was a really interesting study based, as you said, on NCI-MATCH. And many of the listeners will probably remember that the original NCI-MATCH study screened almost 6,000 patients to assess eligibility for those who had an actionable mutation. And it turned out that about 60% of the patients who went on to the study had less common tumors, which were defined as anything other than colon, rectum, breast, non–small cell lung cancer, or prostate cancer. And most of those patients lacked an eligible mutation of interest and so didn’t get onto a trial therapy. But with a great deal of foresight, the study group had actually collected plasma samples from these patients so that they would have the opportunity to look at circulating tumor DNA profiles with the potential being that this might be another way for testing for clinically relevant mutations in some of these less common cancer types. So initially, they tested more than 2,000 patients, and to make a somewhat complicated story short, there was a subset of five histologies with a larger representation in terms of sample size. And these were cholangiocarcinoma, small cell lung cancer, esophageal cancer, pancreatic, and salivary gland cancer. And in those particular tumors, when they compared the ctDNA sequencing with the original tumor, there was a concordance there of around 84%, 85%. And in the presentation, the investigators go on to list the specific mutated genes that were identified in each of those tumors. But I think that the other compelling part of this study from my perspective was not just that concordance, which suggests that there’s an opportunity there for the use of ctDNA instead of tumor biopsies in some of these situations, but what was also interesting was the fact that there were several clinically relevant mutations which were detected only in the circulating tumor DNA. And a couple of examples of those included IDH1 for cholangiocarcinoma, BRAF and p53 in several histologies, and microsatellite instability was most prevalent in small cell lung cancer in the ctDNA. So I think that what this demonstrates is that liquid biopsy is certainly a viable screening option for patients who are being assessed for matching for targeted therapies in clinical trials. The fact that some of these mutations were only seen in the ctDNA and not in the primary tumor specimen certainly suggests that there’s some tumor heterogeneity. But I think that for me, the most compelling part of this study was the fact that many of these mutations were only picked up in the plasma. And so, as the authors concluded, they believe that a comprehensive gene profiling with circulating tumor DNA probably should be included as a primary screening modality in future trials of targeted therapy of this type. Dr. Hamilton: Yeah, I think that that’s really interesting and mirrors a lot of data that we’ve been seeing. At least in breast cancer, you know, we still do a biopsy up front to make sure that our markers, we’re still treating the right disease that we think we are. But it really speaks to the utility of using ctDNA for serial monitoring and the emergence of mutations. Dr. Sweetenham: Absolutely. And you mentioned breast cancer, and so I’d like to dwell on that for a moment here because obviously, there was a huge amount of exciting breast cancer data presented at the meeting this year. And in particular, I’d like to ask you about LBA1008, the DESTINY-Breast09 clinical trial, which I think has the potential to establish a new first-line standard of care for metastatic HER2+ breast cancer. And that’s an area where we haven’t seen a whole lot of innovation for around a decade now. So can you give us some of the highlights of this trial and what your thinking is, having seen the results? Dr. Hamilton: Yeah, absolutely. So this was a trial in the first-line metastatic HER2 setting. So this was looking at trastuzumab deruxtecan. We certainly have had no shortage of reports around this drug, initially approved for later lines. DESTINY-Breast03 brought it into our second-line setting for HER2+ disease and we’re now looking at DESTINY-Breast09 in first-line. So this actually was a 3-arm trial where patients were randomized 1:1:1 against standard taxane/trastuzumab/pertuzumab in one arm; trastuzumab deruxtecan with pertuzumab in another arm; and then a third arm, trastuzumab deruxtecan alone. And what we did not see reported was that trastuzumab deruxtecan-alone arm. But we did have reports from the trastuzumab deruxtecan plus pertuzumab versus the chemo/trastuzumab/pertuzumab. And what we saw was a statistically significant improvement in median progression-free survival, 26.9 months up to 40.7, so an improvement of 13.8 months, over a year in PFS. Not to mention that we’re now in the 40-month range for PFS in first-line disease. Really, across all subgroups, we really weren’t able to pick out a subset of patients that did not benefit. We did see about a 12% ILD rate with trastuzumab deruxtecan. That really is on par with what we’ve seen in other studies, around 10%-15%. I think that this is going to become a new standard of care in the first-line. I think it did leave some unanswered questions. We saw some data from the PATINA trial this past San Antonio Breast, looking at the addition of endocrine therapy with or without a CDK4/6 inhibitor, palbociclib, for those patients that also have ER+ disease, after taxane has dropped out in the first-line setting. So how we’re going to kind of merge all this together is, I suspect that there are going to be patients that we or they just don’t have the appetite to continue 3 to 4 years of trastuzumab deruxtecan. And so we’re probably going to be looking at a maintenance-type strategy for them, maybe integrating the PATINA data there. But how we really put this into practice in the first-line setting and if or when we think about de-escalating down from trastuzumab deruxtecan to antibody therapy are some lingering questions. Dr. Sweetenham: Okay, so certainly is going to influence practice, but watch this space for a little bit longer, it sounds as though that’s what you’re saying. Dr. Hamilton: Absolutely.  So let’s move on to GI cancer. Abstract 4006 reported preliminary results from the randomized phase 2 study of elraglusib in combination with gemcitabine/nab-paclitaxel versus the chemo gemcitabine/nab-paclitaxel alone in patients with previously untreated metastatic pancreatic cancer. Can you tell us more about this study? Dr. Sweetenham: Yeah, absolutely. As you mentioned, elraglusib is actually a first-in-class inhibitor of GSK3-beta, which has multiple potential actions in pancreatic cancer. But the drug itself may be involved in mediating drug resistance as well as in some tumor immune response modulation. Some of that’s not clearly understood, I believe, right now. But certainly, preclinical data suggests that the drug may be effective in preclinical models and may also be effective in combination with chemotherapy and potentially with immune-modulating agents as well. So this particular study, as you said, was an open-label, randomized phase 2 study in which patients with pancreatic cancer were randomized 2:1 in favor of the elraglusib plus GMP—gemcitabine and nab-paclitaxel—versus the chemotherapy alone. And upon completion of the study, which is not right now, median overall survival was the primary end point, but there are a number of other end points which I’ll talk about in just a moment. But the sample size was planned to be around 207 patients. The primary analysis included 155 patients in the combination arm versus 78 patients in the gemcitabine/nab-paclitaxel arm. Overall, the 1-year overall survival rate was 44.1% for the patients in the elraglusib-containing arm versus 23.0% in the patients receiving gemcitabine/nab-paclitaxel only. When they look at the median overall survival, it was 9.3 months for the experimental arm versus 7.2 months for chemotherapy alone. So put another way, there’s around a 37% reduction in the risk of death with the use of this combination arm. The treatment was overall well-tolerated. There were some issues with grade 1 to 2 transient visual impairment in a large proportion of the patients. The most common treatment-related adverse effects with the elraglusib/GMP combination was transient visual impairment, which affected around 60% of the patients. Most of the more serious treatment-related adverse events included neutropenia, anemia, and fatigue in 50%, 25%, and 16% of the patients, respectively. So the early results from this study show a significant benefit for 1-year overall survival and for median overall survival with, as I mentioned above, a significant reduction in the risk of death. The authors went on to mention that the median overall survival for the control arm in this study is somewhat lower than in other comparable trials, but they think that this may be related to a more advanced disease burden in this particular study. Of interest to me was that right now: there is no apparent difference in progression-free survival between the 2 arms of this study. The authors described this as potentially indicating that this may be related in some way to immune modulation and immune effects on the tumor, which, if I’m completely honest, I don’t totally understand. And so, the improvement in overall survival, as far as I can see at the moment, is not matched by an improvement in progression-free survival. So I think we probably need to wait for more time to elapse to see what happens with the study. And so, I think it certainly is an interesting study, and the results are intriguing, but I think it’s probably a little early for it to actually shift the treatment paradigm in this disease. Dr. Hamilton: Fantastic. I think we’ve been waiting for advances in pancreatic cancer for a long time, but this, not unlike others, we learn more and then learn more we don’t realize, so. Dr. Sweetenham: Right. Let’s shift gears at this point and talk about a couple of other abstracts in kind of a very different space. Let’s start out with symptom management for older adults with cancer. We know that undertreated symptoms are common among the older patient population, and Abstract 11002 reported on a randomized trial that demonstrated the effects of remote monitoring for older patients with cancer in terms of kind of symptoms and so on. Can you tell us a little bit about this study and whether you think this approach will potentially improve care for older patients? Dr. Hamilton: Yeah, I really liked this abstract. It was conducted through the Veterans Affairs, and it was based in California, which I’m telling you that because it’s going to have a little bit of an implication later on. But essentially, adults that were 75 years or older who were Medicare Advantage beneficiaries were eligible to participate. Forty-three clinics in Southern California and Arizona, and patients were randomized either into a control group of usual clinic care alone, or an intervention group, which was usual care plus a lay health worker-led proactive telephone-based weekly symptom assessment, and this was for 12 months using the validated Edmonton Symptom Assessment System. So, there was a planned enrollment of at least 200 patients in each group. They successfully met that. And this lay health worker reviewed assessments with a physician assistant, who conducted follow-up for symptoms that changed by 2 points from a prior assessment or were rated 4 or greater. So almost a triage system to figure out who needed to be reached out to and to kind of work on symptoms. What I thought was fantastic about this was it was very representative of where it enrolled. There were actually about 50% of patients enrolled here that were Hispanic or Latinos. So some of our underserved populations and really across a wide variety of tumor types. They found that the intervention group had 53% lower odds of emergency room use, 68% lower odds of hospital use than the control group. And when they translated this to actual total cost of care, this was a savings of about $12,000 U.S. per participant and 75% lower odds of a death in an acute care facility. So I thought this was really interesting for a variety of reasons. One, certainly health care utilization and cost, but even more so, I think any of our patients would want to prevent hospitalizations and ER visits. Normally, that’s not a fantastic experience having to feel poorly enough that you’re in the emergency room or the hospital. And really showing in kind of concrete metrics that we were able to decrease this with this intervention. In terms of sustainability and scalability, I think the question is really the workforce to do this. Obviously, you know, this is going to take dedicated employees to have the ability to reach out to these patients, etc., but I think in value-based care, there’s definitely a possibility of having reimbursement and having the funds to institute a program like this. So, definitely thought-provoking, and I hope it leads to more interventions. Dr. Sweetenham: Yeah, we’ve seen, over several years now, many of these studies which have looked at remote symptom monitoring and so on in this patient population, and many of them do show benefits for that in kinds of end points, not the least in this study being hospitalization and emergency room avoidance. But I think the scalability and personnel issue is a huge one, and I do wonder at some level whether we may see some AI-based platforms coming along that could actually help with this and provide interactions with these patients outside of actual real people, or at least in combination with real people. Dr. Hamilton: Yeah, that’s a fantastic point.  So let’s talk a little bit about clinical trials. So eligibility assessment for oncology clinical trials, or prescreening, really relies on manual review of unstructured clinical notes. It’s time-consuming, it’s prone to errors, and Abstract 1508 reported on the final analysis of a randomized trial that looked at the effect of human-AI teams prescreening for clinical trial eligibility versus human-only or AI-only prescreening. So give us more good news about AI. What did the study find? Dr. Sweetenham: Yeah, this is a really, a really interesting study. And of course, any of us who have ever been involved in clinical trials will know that accrual is always a problem. And I think most centers have attempted, and some quite successfully managed to develop prescreening programs so that patients are screened by a health care provider or health care worker prior to being seen in the clinic, and the clinical investigator will then already know whether they’re going to be eligible for a trial or not. But as you’ve already said, it’s a slow process. It’s typically somewhat inefficient and requires a lot of time on the part of the health care workers to actually do this in a successful way. And so, this was a study from Emory University where they took three models of ways in which they could assess the accuracy of the prescreening of charts for patients who are going to be considered for clinical trials. One of these was essentially the regular way of having two research coordinators physically abstract the charts. The second one was an AI platform which would extract longitudinal EHR data. And then the third one was a combination of the two. So the AI would be augmented by the research coordinator or the other way around. As a gold standard, they had three independent oncology reviewers who went through all of these charts to provide what they regarded as being the benchmark for accuracy. In a way, it’s not a surprise to me because I think that a number of other systems which have used this combination of human verification of AI-based tools, it actually ultimately concluded that the combination of the two in terms of chart accuracy was for the most part better than either one individually, either the research coordinator or the AI alone. So I’ll give you just a few examples of where specifically that mattered. The human plus AI platform was more accurate in terms of tumor staging, in terms of identifying biomarker testing and biomarker results, as well as biomarker interpretation, and was also superior in terms of listing medications. There are one or two other areas where either the AI alone was somewhat more accurate, but the significant differences were very much in favor of a combination of human + AI screening of these patient charts. So, in full disclosure, this didn’t save time, but what the authors reported was that there were definite efficiency gains, and presumably this would actually become even more improved once the research coordinators were somewhat more comfortable and at home with the AI tool. So, I thought it was an interesting way of trying to enhance clinical trial accrual up front by this combination of humans and technology, and I think it’s going to be interesting to see if this gets adopted at other centers in the future. Dr. Hamilton: Yeah, I think it’s really fascinating, all the different places that we can be using AI, and I love the takeaway that AI and humans together are better than either individually. Dr. Sweetenham: Absolutely.  Thanks once again, Dr. Hamilton, for sharing your insights with us today and for all of the incredible work you did to build a robust program. And also, congratulations on what was, I think, a really remarkable ASCO this year, one of the most exciting for some time, I think. So thank you again for that. Dr. Hamilton: Thanks so much. It was really a pleasure to work on ASCO 2025 this year. Dr. Sweetenham: And thank you to our listeners for joining us today. You’ll find links to all the abstracts we discussed today in the transcript of this episode. Be sure to catch up on all of our coverage from the Annual Meeting. You can catch up on my daily reports that were published each day of the Annual Meeting, featuring the key science and innovations presented. And we’ll have wrap-up episodes publishing in June, covering the full spectrum of malignancies from ASCO25. If you value the insights you hear on the ASCO Daily News Podcast, please remember to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.   More on today’s speakers: Dr. John Sweetenham   Dr. Erika Hamilton @erikahamilton9   Follow ASCO on social media:  @ASCO on Twitter  ASCO on Bluesky  ASCO on Facebook   ASCO on LinkedIn     Disclosures:     Dr. John Sweetenham:     No relationships to disclose    Dr. Erika Hamilton: Consulting or Advisory Role (Inst): Pfizer, Genentech/Roche, Lilly, Daiichi Sankyo, Mersana, AstraZeneca, Novartis, Ellipses Pharma, Olema Pharmaceuticals, Stemline Therapeutics, Tubulis, Verascity Science, Theratechnologies, Accutar Biotechnology, Entos, Fosun Pharma, Gilead Sciences, Jazz Pharmaceuticals, Medical Pharma Services, Hosun Pharma, Zentalis Pharmaceuticals, Jefferies, Tempus Labs, Arvinas, Circle Pharma, Janssen, Johnson and Johnson   Research Funding (Inst): AstraZeneca, Hutchison MediPharma, OncoMed, MedImmune, Stem CentRx, Genentech/Roche, Curis, Verastem, Zymeworks, Syndax, Lycera, Rgenix, Novartis, Millenium, TapImmune, Inc., Lilly, Pfizer, Lilly, Pfizer, Tesaro, Boehringer Ingelheim, H3 Biomedicine, Radius Health, Acerta Pharma, Macrogenics, Abbvie, Immunomedics, Fujifilm, eFFECTOR Therapeutics, Merus, Nucana, Regeneron, Leap Therapeutics, Taiho Pharmaceuticals, EMD Serono, Daiichi Sankyo, ArQule, Syros Pharmaceuticals, Clovis Oncology, CytomX Therapeutics, InventisBio, Deciphera, Sermonix Pharmaceuticals, Zenith Epigentics, Arvinas, Harpoon, Black Diamond, Orinove, Molecular Templates, Seattle Genetics, Compugen, GI Therapeutics, Karyopharm Therapeutics, Dana-Farber Cancer Hospital, Shattuck Labs, PharmaMar, Olema Pharmaceuticals, Immunogen, Plexxikon, Amgen, Akesobio Australia, ADC Therapeutics, AtlasMedx, Aravive, Ellipses Pharma, Incyte, MabSpace Biosciences, ORIC Pharmaceuticals, Pieris Pharmaceuticals, Pieris Pharmaceuticals, Pionyr, Repetoire Immune Medicines, Treadwell Therapeutics, Accutar Biotech, Artios, Bliss Biopharmaceutical, Cascadian Therapeutics, Dantari, Duality Biologics, Elucida Oncology, Infinity Pharmaceuticals, Relay Therapeutics, Tolmar, Torque, BeiGene, Context Therapeutics, K-Group Beta, Kind Pharmaceuticals, Loxo Oncology, Oncothyreon, Orum Therapeutics, Prelude Therapeutics, Profound Bio, Cullinan Oncology, Bristol-Myers Squib, Eisai, Fochon Pharmaceuticals, Gilead Sciences, Inspirna, Myriad Genetics, Silverback Therapeutics, Stemline Therapeutics

Dr. John Sweetenham shares highlights from Day 5 of the 2025 ASCO Annual Meeting, including data from large trials in advanced malignant melanoma and mCSPC plus a new approach to first-line treatment for patients with multiple myeloma who are not transplant eligible. Transcript Hello, I’m Dr. John Sweetenham, the host of the ASCO Daily News Podcast, with my takeaways on selected abstracts from Day 5 of the 2025 ASCO Annual Meeting. My disclosures are available in the transcript of this episode. The selected abstracts from this final day of ASCO25 include important new data from large, randomized trials in patients with advanced malignant melanoma and patients with metastatic castration-sensitive prostate cancer, as well as a new approach to the first-line treatment of patients with multiple myeloma who are not transplant eligible.  Starting with LBA9500, this study was conducted in patients with completely resected stage III or IV malignant melanoma and compared the combination of relatlimab plus nivolumab versus nivolumab alone in this population. The study, named the RELATIVITY-098 trial, was presented by Dr. Georgina Long from the University of Sydney, Australia. In her introduction to the study, Dr. Long explained that the current standard of care for adjuvant therapy of resected stage III/IV melanoma is with PD-1 monotherapy with nivolumab, but that about 50% of patients will suffer from a subsequent relapse. In the first-line setting in patients with advanced or unresectable melanoma, the combination of nivolumab with the LAG-3 inhibitor, relatlimab, has been previously shown to improve progression-free survival in the RELATIVITY-047 trial. The current study evaluated this same combination in the adjuvant setting. More than 1,000 patients from 24 countries were randomized to receive either nivolumab alone (546 patients) or the combination of nivolumab with relatlimab (547 patients). Both treatments were given for a maximum of 1 year or until progression of disease, unacceptable toxicity, withdrawal, or death. Various biomarker studies were also undertaken including LAG-3 and PD-1 expression on CD8-positive T cells. The primary endpoint of the study was relapse-free survival, and Dr. Long reported that this was the same in both arms of the study. For example, at 24 months, the relapse-free survival was 64% in the monotherapy arm compared with 62% in the combination arm. The hazard ratio was 1.01 and the P value was 0.928. Metastasis-free survival was also identical in both arms. No benefit was observed for the combination in any of the prespecified subgroups. No new toxicity signals emerged compared with the RELATIVITY-047 trial. Interestingly, the baseline surface expression of LAG-3 and co-expression of LAG-3 and PD-1 on CD8 T cells in the 098 adjuvant trial were lower than in the 047 advanced disease trial, perhaps explaining why the combination did not confer benefit over nivo alone in the adjuvant setting. This is an important result, demonstrating that results from one clinical setting cannot always be extrapolated to another. Although the combination has gained some use in the adjuvant setting, this study clearly demonstrates that more drug in this situation is no better and that monotherapy remains the current standard of care. Results from the AMPLITUDE trial for patients with metastatic castration-sensitive prostate cancer with alterations in homologous recombination repair (HRR) genes, in LBA5006, were presented today by Dr. Gerhardt Attard from University College London, UK. This international, multicenter study evaluated the combination of the selective PARP inhibitor, niraparib, in combination with abiraterone acetate and prednisone. The same combination has been previously shown to improve outcomes in castration-resistant metastatic prostate cancer harboring BRCA mutations in the MAGNITUDE study. The current trial included patients with castration-sensitive disease with HRR mutations including BRCA1/2. Six hundred and ninety-six patients were randomized between niraparib, abiraterone, and prednisone plus androgen deprivation therapy, or the same combination with placebo instead of niraparib. Permitted prior therapies included no more than 6 months of prior androgen deprivation therapy and the use of docetaxel, or prior palliative radiation therapy. The primary endpoint of the study was radiographic relapse-free survival. Dr. Attard reported that the risk for radiographic progression-free survival in the whole population was significantly reduced by 37% with niraparib and abiraterone acetate plus prednisone compared with the placebo arm. The radiographic progression-free survival risk reduction with niraparib in the prespecified BRCA1/2 subgroup was 48% and reached statistical significance compared with the placebo arm. The secondary endpoint of time to symptomatic progression was also improved with niraparib in the HRR population and the BRCA1/2 subgroup. There was a trend for overall survival favoring the niraparib combination. However, the overall survival data were immature at this first interim analysis and did not yet reach statistical significance. No new safety concerns emerged with the toxicity data consistent with the MAGNITUDE study. Less than 5% more of the patients on the experimental arm discontinued treatment in comparison to the control arm. The authors conclude that the AMPLITUDE study results support the use of niraparib, abiraterone, and prednisone as a new treatment option for patients with metastatic castration- sensitive prostate cancer and BRCA and homologous recombination repair gene alterations. The results certainly support this conclusion and are potentially practice-changing. Turning to hematologic malignancies, my final selection from today’s presentations is Abstract 7504, presented by Dr. Hang Quach from St Vincent’s Hospital, Melbourne, Australia, and describes a novel combination of elranatamab, daratumumab, and lenalidomide in patients with newly diagnosed multiple myeloma who are not transplant-eligible – the so-called MagnetisMM-6 trial part 1. Elranatamab is a novel bispecific T-cell engaging antibody directed against BCMA and CD3, which has previously been approved for certain patients with relapsed and refractory multiple myeloma. In the present study, this was combined with lenalidomide and daratumumab in newly diagnosed patients. The report today describes the dose-finding phase of this study, which was part 1, specifically addressing so-called dose level ‘G’, comprising elranatamab 76mg subcutaneously every 4 weeks plus daratumumab 1800mg subcutaneously and lenalidomide 25mg given orally. Thirty-seven patients were entered at this dose level, of whom 32 were on treatment at the time of analysis. Early response data show an overall response rate of 97.3%. With median follow up of 7.9 months, the current CR rate is 27% with a VGPR rate of almost 68%. The most frequent toxicities were hematologic, with neutropenia observed in 75%. Some cytokine release syndrome was observed in about 60% of patients, but none was greater than grade 2. The authors conclude that this combination is active in untreated multiple myeloma, with manageable toxicity and evidence of responses which appear to deepen over time. The dose-finding component of this trial is continuing and will subsequently progress into a phase 3 trial based on the data from the current study. This will compare daratumumab plus lenalidomide with the same combination plus elranatamab in previously untreated patients. That concludes our special coverage from the 2025 ASCO Annual Meeting. Thanks for listening and we hope you have enjoyed listening to our top takeaways from ASCO25. If you value the insights that you hear on the ASCO Daily News Podcast, please remember to rate, review, and subscribe wherever you get your podcasts. Disclaimer:  The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.  Find out more about today’s speaker:    Dr. John Sweetenham    Follow ASCO on social media:     @ASCO on Twitter    @ASCO on Bluesky    ASCO on Facebook    ASCO on LinkedIn     Disclosures:   Dr. John Sweetenham:    No relationships to disclose

Dr. John Sweetenham shares highlights from Day 4 of the 2025 ASCO Annual Meeting, including new research on maintenance therapy in small cell lung cancer and a virtual reality psychosocial intervention for patients undergoing hematopoietic stem cell transplantation. Transcript Hello, I’m Dr. John Sweetenham, the host of the ASCO Daily News Podcast, with my takeaways on selected abstracts from Day 4 of the 2025 ASCO Annual Meeting. My disclosures are available in the transcript of this episode. Today’s selection features reports of 3 randomized trials in very different clinical settings: maintenance therapy in extensive small cell lung cancer (SCLC), upfront surgery in advanced ovarian cancer, and a supportive care intervention for patients undergoing hematopoietic stem cell transplantation. The first of these studies, Abstract 8006, was presented by Dr. Luis Paz-Ares from the University Hospital [October 12] in Madrid, Spain, and reports the primary results of the IMforte trial. This was a phase 3 trial evaluating the combination of lurbinectedin and atezolizumab as first-line maintenance therapy in patients with extensive small cell lung cancer. Despite some improvements in the first-line treatment of extensive small cell lung cancer with the use of checkpoint inhibitors in combination with platinum-based chemotherapy, most of the patients experience early disease progression and long-term survival remains very limited. This provides a rationale for considering a maintenance intervention. Lurbinectedin is an alkylating agent and transcription inhibitor [that is] already approved in the United States for patients with relapsed/refractory metastatic SCLC following platinum-based chemotherapy. It has been shown to synergize with immune checkpoint inhibitors in pre-clinical studies and has also been evaluated in early-phase clinical trials. The IMforte trial is a global, randomized trial in which patients are initially treated with atezolizumab, and those patients who do not progress on induction therapy are then randomized to maintenance therapy with atezolizumab alone or atezolizumab with lurbinectedin. The primary endpoints of the study were progression-free and overall survival. Four hundred and eighty-three patients were randomized and at a median follow-up of 15 months, the median progression-free survival for patients who received the combination was 5.4 months and the median overall survival was 13.2 months. This compares with 2.1 and 10.6 months, respectively, in patients who received atezolizumab only. The lurbinectedin and atezolizumab combination was generally well-tolerated, with no new or unexpected safety signals. The benefit was consistent in magnitude across all the relevant patient subgroups. This is the first phase 3 study to show a progression-free and overall survivial improvement with first-line maintenance in extensive stage SCLC and the result is likely to be practice-changing, establishing a new standard of care in this tough-to-treat disease. Next up is LBA5500, presented by Dr. Sven Mahner from LMU University in Munich, Germany. This describes the results of the TRUST study, a randomized trial of upfront surgical therapy in advanced ovarian cancer. As background, total macroscopic tumor resection with maximal effort cytoreductive surgery is the cornerstone of treatment in patients with advanced ovarian cancer. The optimal timing of such surgery remains controversial, whether it’s more beneficial as a primary cytoreductive surgery before chemotherapy or in the form of interval cytoreductive surgery after 3 cycles of neoadjuvant chemotherapy. Previous studies have addressed this issue, but results have been confounded by issues of patient and center selection. The TRUST study is a randomized, international, multicenter phase 3 trial that compares the outcomes of the timing of surgery in surgically fit patients with seemingly resectable FIGO stage IIIB/IVB ovarian, tubal, and peritoneal carcinoma. To ensure consistent and adequate surgical quality, participating centers in the trial were required to obtain accreditation and undergo an onsite quality assurance review. This included assessment of infrastructure, surgical proficiency, complete resection rates, and surgical volume. Seven hundred and ninety-seven patients with advanced ovarian cancer were randomized to undergo surgery prior to therapy with 6 cycles of carboplatin and paclitaxel along with bevacizumab and a PARP inhibitor, or to have the surgery between the third and fourth cycle of the same systemic therapy. Of the initial 797 patients, 688 comprised the intent-to-treat population, of whom 345 received primary cytoreductive surgery and 343 received neoadjuvant chemotherapy followed by interval cytoreductive surgery.  The results show that patients undergoing primary surgery had significantly improved progression-free survival compared with those who had interval cytoreductive surgery (median progression-free survival was 22.1 months versus 19.7 months). No difference in overall survival was observed between the 2 arms of the study.  This is the first study to show a benefit for primary cytoreductive surgery, although the progression-free survival improvement was not reflected in an overall survival difference. A subgroup analysis for patients who underwent complete cytoreduction suggests a progression-free survival and survival benefit, although it isn’t clear to me that the study was powered for this endpoint. Nevertheless, these are very difficult studies to perform, and the investigators should be congratulated for this robustly conducted clinical trial. Today’s final abstract is 1504, presented by Dr. Hermioni Amonoo from Harvard Medical School. The trial evaluated BMT-VR, a virtual reality psychosocial intervention for patients undergoing bone marrow transplantation. This randomized trial included adult patients undergoing autologous and allogeneic transplantation. The BMT-VR platform included, among others, modules addressing psychoeducation, coping, acceptance, and gratitude. BMT-VR patients were provided with VR headsets and completed all modules during their hospitalization. Patient-reported outcomes were then assessed at 2, 4, 12, and 24 weeks post-BMT. Use of the VR tool was tracked during hospitalization. Control patients received usual care during their hospital stay and were then assessed at the same intervals post-BMT.  Eighty evaluable patients were randomized, 39 to BMT-VR and 41 to usual care. Completion rates for the BMT-VR modules were high [at] around 70-75%.  Patients who received the BMT-VR intervention experienced significantly improved anxiety, quality of life, and coping at 4 weeks post-BMT. In the longer term, sustained benefits were seen at 24 weeks for some endpoints including quality of life, with some benefits, including for depression and PTSD symptoms, improving longitudinally over the study period. These data are preliminary and will need to be confirmed in larger multicenter studies, but this trial demonstrates the feasibility of using virtual interventions in our patients and also provides intriguing preliminary data that they may be effective. Thanks for listening to today’s report and I hope you will join me again tomorrow to hear more top takeaways from the final day of ASCO25. If you value the insights that you hear on the ASCO Daily News Podcast, please remember to rate, review, and subscribe wherever you get your podcasts.   Disclaimer:   The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.     Find out more about today’s speaker:     Dr. John Sweetenham       Follow ASCO on social media:      @ASCO on Twitter     @ASCO on Bluesky     ASCO on Facebook     ASCO on LinkedIn       Disclosures:    Dr. John Sweetenham:     No relationships to disclose 

Dr. John Sweetenham shares highlights from Day 3 of the 2025 ASCO Annual Meeting, including new research for the treatment of advanced renal cell carcinoma and 2 studies on novel approaches in non-small cell lung cancer. Transcript Dr. John Sweetenham: Hello, I’m Dr. John Sweetenham, the host of the ASCO Daily News Podcast, with my takeaways on selected abstracts from Day 3 of the 2025 ASCO Annual Meeting. Today’s selection features studies addressing the treatment of advanced renal cell carcinoma and 2 studies exploring novel approaches in non-small cell lung cancer. My disclosures are available in the transcript of this episode. The first abstract is number 4505. This study, led by Dr. Toni Choueiri of the Dana-Farber Cancer Institute, describes the final analysis of the CheckMate 214 trial, which compared the combination of nivolumab and ipilimumab with sunitinib for the first-line treatment of advanced renal cell carcinoma. The ipi-nivo combination is approved for the frontline treatment of intermediate and poor-risk advanced renal cell carcinoma based on the primary analysis of the CheckMate 214 trial, which demonstrated a higher response rate and longer overall survival compared with sunitinib. Today’s presentation provided the final safety and efficacy results for the trial with long-term follow-up of more than 9 years.  The intent-to-treat (ITT) population in this trial comprised 550 patients randomized to nivo and ipi versus 546 who received sunitinib. The final analysis showed sustained long-term benefit for the combination therapy. Patients given nivolumab plus ipi had a 29% reduction in the risk for death compared with sunitinib. For patients with intermediate or poor-risk disease, there was a 31% reduction in the risk of death.   The probability of remaining in response through 8 years was more than doubled with nivolumab plus ipilimumab versus sunitinib in the ITT population at 48% versus 19%, and in the intermediate and poor-risk population at 50% versus 23%. The other important observation is that patients with favorable-risk disease appeared to have a 20% reduction in the risk for death at 9 years and more durable responses. This suggests a possible delayed benefit for ipi and nivo in this group since these differences were not seen in the earlier analysis.   No new safety signals emerged with longer follow-up, and the results confirm the use of ipi and nivo as a standard front-line combination therapy in this disease. Since this combination has been in widespread use for some years, the results are not surprising although the subgroup analysis suggesting benefit in favorable-risk patients is likely to inform practice in the future.   Today’s second abstract is number is 8506, which was presented by Dr. Tony Mok from the Chinese University of Hong Kong, describing results from the phase 3 HERTHENA-Lung02 trial. This trial compared the antibody-drug conjugate patritumab deruxtecan with platinum-based chemotherapy in patients with EGFR-mutated advanced non-small cell lung cancer following a third-generation tyrosine kinase inhibitor (TKI).  Patritumab deruxtecan, also known as HER3-DXd, comprises a fully human anti-HER3 IgG3 monoclonal antibody conjugated to a topoisomerase 1 inhibitor payload, and showed activity in a previous phase 2 trial in patients relapsing after EGFR TKI and chemotherapy.   In this phase 3 study, this agent was compared with platinum-based chemotherapy in eligible patients with an EGFR-activating mutation who had previously received 1 or 2 EGFR TKIs, at least one of which was a third-generation drug, with relapse or progression after this therapy. Five hundred and eighty-six patients were enrolled, with progression-free survival as the primary endpoint.  The primary analysis showed a 9-month progression-free survival of 29% for the experimental arm compared with 19% for platinum-based chemotherapy, for a hazard ratio of 0.77 and a P value of 0.011. With higher progression-free survival rates at 6 months and 12 months, HER3-DXd also had a better objective response rate (35.2% versus 25.3%) compared with platinum-based chemotherapy (PBC), and HER3-DXd also extended intracranial progression-free survival compared with PBC in patients with brain metastases, with a hazard ratio of 0.75. Grade 3 or more treatment-related adverse events occurred in 73% of patients treated with HER3-DXd and 57% of patients who received PBC. HER3-DXd had a higher rate of grade or more 3 thrombocytopenia, and drug-related interstitial lung disease occurred in 5% of patients in the HER3-DXd arm.   The follow-up will need more time to mature since no overall survival data are currently available, but definitely an agent to watch with interest. Moving on to today’s final abstract, 8500, was presented by Dr. Pasi Jänne from the Dana-Farber Cancer Institute, describing results from the phase 2 portion of the KRYSTAL-7 study. This study is exploring the use of a potent KRAS inhibitor, adagrasib, in combination with pembrolizumab in patients with advanced or metastatic KRASG12C- mutated non-small cell lung cancer.  Adagrasib has already received accelerated approval in the U.S. for previously treated locally advanced or metastatic NSCLC with a KRASG12C mutation. A previous report from the KRYSTAL-7 study demonstrated encouraging activity in combination with pembrolizumab in the frontline setting for this patient group who also had more than 50% expression of PD-L1. The presentation today described efficacy and safety data for this drug combination across all PD-L1 expression levels.  One hundred and forty-nine patients with a median age of 67 years were treated with the combination, 104 of whom had PD-L1 expression level results available, representing the so-called biomarker population in this trial. The overall response rate for the entire study population was 44%. In the biomarker population, the overall response rate ranged from 36% in those with less than 1% PD-L1 expression to 61% for those with more than 50% expression. For all patients, the median response duration was just over 26 months, and the median progression-free and overall survival rates were 11 and 18.3 months respectively.    For the biomarker population, the median progression-free and overall survival were highest in those patients with more than 50% PD-L1. No new safety issues emerged from this analysis; the most frequent toxicities were nausea, diarrhea, and increases in transaminases. Immune-related toxicities included pneumonitis, hypothyroidism, and hepatitis. These are important results and the results of the phase 3 portion of KRYSTAL-7, which compares first-line therapy with adagrasib plus pembro versus pembro alone in the KRASG12C mutated/PD-L1 more than 50% group, will be informative. For those patients with lower levels of PD-L1 expression, the authors suggest that the treatment escalation may be beneficial, possibly including the addition of chemotherapy.  That concludes today’s report. Thanks for listening and I hope you will join me again tomorrow to hear more top takeaways from ASCO25. If you value the insights that you hear on the ASCO Daily News Podcast, please remember to rate, review, and subscribe wherever you get your podcasts.  Disclaimer:  The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.  Find out more about today’s speaker:    Dr. John Sweetenham    Follow ASCO on social media:     @ASCO on Twitter    @ASCO on Bluesky    ASCO on Facebook    ASCO on LinkedIn     Disclosures:   Dr. John Sweetenham:    No relationships to disclose