Dr. Jason Luke, director of the Cancer Immunotherapeutics Center at UPMC Hillman Cancer Center, discusses advances in immunotherapy across the spectrum of malignancies featured at the 2021 ASCO Annual Meeting.   Transcript:  ASCO Daily News: Welcome to the ASCO Daily News podcast. I'm Geraldine Carroll, a reporter for the ASCO Daily News. My guest today is Dr. Jason Luke, the director of the Cancer Immunotherapeutics Center at UPMC Hillman Cancer Center. Dr. Luke also serves as associate professor of medicine at the University of Pittsburgh School of Medicine. His clinical focus is on immunotherapy for advanced solid tumors, as well as cutaneous malignancies and melanoma. He joins me to discuss advances in immunotherapy featured at the 2021 ASCO Annual Meeting. Dr. Luke has relationships with most of the pharmaceutical companies that have funded the research discussed in this episode. His full disclosures are available on the transcript of this episode. Dr. Luke, always great to have you on the podcast. Dr. Jason Luke: Well, thanks so much for the invitation today. ASCO Daily News: Well, there was an abundance of novel therapies and practice-changing studies presented during this year's [ASCO] Annual Meeting. Did you detect any themes among all of the great studies presented during the meeting? Dr. Jason Luke: Well, I agree. And as I was sort of taking the fire-hose of abstracts in this year, I thought there were four themes that really seemed to stand out to me. And when I was thinking through them, I think the first one was the validation of a new checkpoint, or a third validated checkpoint for use in clinical practice. A second one was really the emergence of immunotherapy, now being used in the curative setting, meaning either in adjuvant studies or in neoadjuvant studies. And the third area was advancements in this management of metastatic disease with practice-changing trials. And then the fourth area, which is always near and dear to me, is novel therapeutics with the development of the next generation of immunotherapies, and those early data that might give us a hint towards what might be coming next. ASCO Daily News: OK, so let's first look at the third validated checkpoint for use in clinical practice. That's Abstract 9503. Dr. Jason Luke: Yeah, absolutely. So this year at ASCO, we saw the results of a clinical trial described as the RELATIVITY-047 study, which was a global randomized double blind phase II/III study comparing anti-PD-1 antibody with nivolumab (nivo) versus a combination of nivolumab with the anti-LAG-3 antibody relatlimab. And so LAG-3 is a molecule that many will be familiar with, but perhaps not everyone. And LAG-3 is another receptor on T cells that can become up-regulated as T cells become dysfunctional in the tumor microenvironment. And so all are aware of the concept that infiltrating lymphocytes can get into tumors, and then they get blocked by these immune checkpoints. And so LAG-3 is another immune checkpoint expressed on these tumor infiltrating lymphocytes. And I don't have time to go into all of this, but in the preclinical space, blocking LAG-3 with an antibody is actually, in many mouse models, more effective than blocking a PD-1 or PD-L1. And so there's been a lot of interest. LAG-3 was one of the first targets to really develop as a co-target to PD-1. And just to zoom forward then to the clinical trial, this was a study where patients with advanced, untreated, metastatic melanoma were randomized one to one to either get relatlimab plus nivolumab, in what they are describing as a fixed dose combination, meaning that there's an infusion of the dose once a month, relatlimab 160 milligrams plus nivolumab 480 milligrams. And that was the same dose. And so it's only one infusion, even though it's two drugs, one infusion. That was compared with nivolumab. And there were a number of stratification factors, et cetera, in the study. And they're useful to get into the minutia, but right now, I t