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CAR T-Cell Therapy | Transforming Myeloma Patient Care

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Dr. Rahul Banerjee, a myeloma specialist and researcher, describes how CAR T-cell therapy has revolutionized care for people with myeloma. Dr. Banerjee discusses recent advances in research, citing specific studies that are having an impact, and goes on to review the currently FDA-approved CAR T-cell therapies.

Dr. Rahul Banerjee is a physician and researcher specializing in multiple myeloma and an assistant professor in the Clinical Research Division at the University of Washington Fred Hutchinson Cancer Center in Seattle, WA. Learn more about Dr. Rahul Banerjee.

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Myeloma Research | Updates in CAR T-Cell Therapy

 Will CAR T-Cell Therapy Be Approved for Earlier Lines of Myeloma Treatment

Will CAR T-Cell Therapy Be Approved for Earlier Lines of Myeloma Treatment? 

Transcript:

Katherine Banwell:

We’ve been talking about CAR T-cell therapy for a number of years now. How has this treatment revolutionized care for patients? 

Dr. Rahul Banerjee:

Absolutely. So, the biggest benefit of CAR T therapy, I think, is how well it works. So, I’ll predominantly focus on multiple myeloma, but of course there are CAR T therapies that are approved for different kinds of lymphoma, and B-cell leukemia as well. But in brief, CAR T therapy, we train the immune system to fight back against the myeloma, against the cancer that’s there. And it’s phenomenal, because it’s the only living drug we have, really, in our toolbox. Everything else is dependent on the dose, right? As soon as the drug is out of your system, it stops working. CAR T cells don’t work that way. They can live and expand and proliferate to get rid of the threat within. 

And at least in myeloma, for example, CAR T therapies regularly have response rates, meaning complete response rates, how quickly they knock all the myeloma parameters down to zero basically in the 70, 80, 90 percent range. Many patients achieve measurable residual disease, or MRD negativity, meaning by all the best tools available in 2024, no sign of the myeloma anywhere.  

That doesn’t mean cure, to be fair, but that’s wonderful. With other conventional therapies, to have one drug with one infusion have that big of an impact on the myeloma is phenomenal.  

The other benefit of CAR T therapy is that it is a one-time infusion. It doesn’t mean that patients can get one-time CAR T and never have to see a cancer doctor again because again, at least in myeloma, I don’t consider CAR T to be uniformly curative for patients. However, if you look at the studies, and there’ve been two randomized studies in myeloma of CAR T therapy versus standard therapies. One was a KarMMa-3 trial with a drug called ide-cel, a CAR T drug also known as Abecma. And the other one was CARTITUDE-4, which was a study of cilta-cel versus standard treatment. And cilta-cel is a kind of CAR T also known as Carvykti.  

Both studies saw improvements, dramatic improvements in the response rate, how many patients had the myeloma numbers come down, but also durations of response and progression-free survival. How long patients were alive and disease-free for.  

Literally just a month ago, we found out officially that the cilta-cel trial and the CARTITUDE-4 study, CAR T actually prolonged overall survival compared to standard therapies, which is what patients are looking for.  

But for me, what I love about CAR T the most is not just that you’re in remission for longer, or with cilta-cel you live longer, but that you live better. Both studies, and I’m very happy to see this incorporated, what we call patient-reported outcomes, which is an area of research of mine. Patient-reported outcomes are, as you can imagine, outcomes that are reported by the patient. Not the blood test for the myeloma, but how are patients feeling in terms of their quality of life, in terms of their fatigue, in terms of their pain.  

And in both studies, off the charts. CAR T does way better and way faster in terms of improving quality of life than standard treatments, to the point where the studies, for example, often for both of them, if I recall correctly, the first time point where they looked and compared the two arms was three months after CAR T. And already by then, night and day difference.  

The patients who got CAR T, the first month a little bit rocky, but after the first month or two, they’re doing better, because they’re not on myeloma treatments continuously. They’re still getting blood work checked and so forth, but they’re not on treatment. It’s a one-time infusion and monitoring thereafter.  

And I love that about it, and I think that explains a lot of the quality of life benefits that we see.  

For my other patients with myeloma, outside of CAR T, there is never a scenario where they’re observed. The vast majority of patients because myeloma is considered incurable, we keep them on some form of maintenance treatment, and those come with side effects. Those come with financial toxicity. That’s the word we use for high out-of-pocket costs. They come with what I would call time toxicity. That’s time spent on the phone coordinating shipments or coming in for this infusion or that infusion. 

CAR T has much less of that, and I think that’s phenomenal. So, I would say that it’s revolutionized the field, not just scientifically from the things that you’d expect a researcher to care the most about – for how long, you know, how deep are their remissions and how durable are their remissions, but also for the things that I care about. The art of oncology is how our patients are living, and that’s why I think CAR T is revolutionary. 

Katherine Banwell:

Dr. Banerjee, would you walk us through the currently approved CAR T-cell therapies for myeloma and share how these treatments work to combat myeloma? 

Dr. Rahul Banerjee:

Absolutely so. So, there’s two FDA-approved CAR T therapies right now for multiple myeloma. One is ide-cel, also known as Abecma. One is cilta-cel, also known as Carvykti. The mechanics of them are pretty similar. Both involve T cells being collected from the patient and then turned into CAR T cells, cancer fighting cells in a lab, then put back into the patient after a small dose, what we call lympho-depleting chemotherapy, that creates a void and makes room for the T cells. 

And then the T cells come in and are able to activate and proliferate and respond and kill off the myeloma. In terms of the two drugs, the differences between them, we might come back to that a bit in terms of just how they’re approved. Cilta-cel is currently approved as early as first relapse. So, second line treatment onwards in myeloma for patients who have disease that is refractory to lenalidomide (Revlimid) or a similar class of drugs.  

So, lenalidomide is Revlimid. So, if someone’s been on Revlimid and it stopped working, they could technically go to cilta-cel, which is Carvykti, as soon as second line. 

Ide-cel or Abecma is approved for third line treatment, meaning at least two prior relapses or two types of therapy that were stopped unexpectedly because of not working or toxicities or so forth. And those patients would have had to have received both an iMiD, like Revlimid, which is lenalidomide, a proteasome inhibitor, which is like Velcade or bortezomib, and a CD38 directed monoclonal antibody like daratumumab, which is also called Darzalex or Darzalex Faspro. 

What CAR T Research Is Ongoing to Improve Treatment Response?

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What CAR T Research Is Ongoing to Improve Treatment Response? from Patient Empowerment Network on Vimeo.

 How can CAR T treatment response be improved with research? Expert Dr. Krina Patel from The University of Texas MD Anderson Cancer Center discusses the CARTITUDE, KARMMA-9, and LEGEND studies and proactive patient advice about bispecific therapy and CAR T.

[ACT[IVATION TIP

“…before you start bispecific therapy, talk to your doctor about CAR T. And the reason I say that is that when you get a bispecific therapy, and currently that is not a fixed duration therapy, it is a continuous therapy. So patients are on it until they relapse. And the problem is that once you relapse on that T-cell therapy, your risk of losing BCMA, losing the antigen is much higher. There are mutations that we’re seeing that most patients get.”

Download Guide | Descargar Guía

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Transcript:

Lisa Hatfield:

So, Dr. Patel, given the risk of relapse following initial CAR T therapy, what approaches are being investigated to enhance the persistence and durability of CAR T-cell responses in patients? I know there are a lot of theories out there saying things like antigen loss might be an issue, the loss of the target BCMA, T-cell exhaustion, the environment of the bone marrow, what of those theories are being investigated or looked at?

Dr. Krina Patel:

Yeah, I think without causing too many issues with why we think CAR T is so great, where it’s a one-and-done, right? That gives people this wonderful time off. In the relapsed/refractory setting, I think our goal is can we use CAR T to cure, right? That is the ultimate question. And, again, with cilta-cel (ciltacabtagene autoleucel) [Carvykti], with the original data from the LEGEND study, which was the original study in China, those patients had a little bit less therapy than CARTITUDE. However, there are about 15 percent of patients that are six years out from their CAR T still in remission, right?

And so that gives us a little bit of hope that maybe we’ll have a small tail and a small number of patients that are cured from our current CAR T approaches. But the question is, how do we now increase that tail and make it more like lymphoma? And then hopefully, 90, 100 percent of patients eventually, how can we, how can you get everyone cured? And so I think it comes down to myeloma is not the same for everybody, right? So you have our high-risk patients versus our standard-risk patients. And I think the strategies are going to be different for those two patient populations.

They already are in the way we treat patients with even induction therapy and maintenance and consolidation. We tend to be much more aggressive with folks who have high-risk disease versus those who don’t. And so, I think the biggest studies right now that are looking at this are really the combination studies. And so looking at CAR T followed by some type of maintenance, but fixed duration maintenance. So CARTITUDE 5 and 6 and KarMMa-9, these are all the studies of the BCMA CAR Ts in frontline. All of them will have maintenance afterwards, but it seems to be that they’re going to be two years of LEN maintenance and that’s it, nothing after that.

So LEN, lenalidomide (Revlimid), we know that it activates T cells. It activates other immune cells like NK cells in the body, even B cells. And so when you get cytokine release syndrome from the CAR T, you’re already making more of these immune cells and activating them. And now you’re going to have lenalidomide in there to kind of keep that going, right? And so that could help with this, not persistence of the CAR T itself, but persistence of better immune cells that can actually keep your myeloma down, right? So I think that’s one way.

The other way is some of the new therapies like CELMoDs. So these are sort of the newer version of lenalidomide and pomalidomide. They tend to have more immune effect than the other two drugs. So there’s studies looking at other CAR Ts, so a different target, right? So we talked about antigen loss. If you’ve lost BCMA, then what do we do?

Well, there’s other targets like GPRC5D. So a couple of the studies are looking at GPRC5D-CAR-T plus mezigdomide, which is one of the CELMoDs, or another arm is iberdomide, which is the other CELMoD, and looking at different doses without causing too many side effects, but still helping the T cell keep going, all kinds of things going on there. So those are some interesting studies.

And one of the cohorts, it’s actually using a GPRC5D-CAR-T with a BCMA bispecific after, that’s combinations. So now you’re targeting two different antigens and you’re using T cells in two different ways, right? And again, it’s fixed duration so that it’s not forever, but after a certain period, hopefully, we fix the bone marrow and we’ve killed enough myeloma that hopefully it won’t come back.

And so I think all of those are different strategies for the T-cell exhaustion to help with that, to hopefully keep from getting antigen loss, or if someone does have antigen loss, figuring out a way to go around it. And then the microenvironment I think is the biggest one, is how do we find cytokines and other things that can give us a bone marrow microenvironment that makes it really inhospitable for that myeloma to ever come back again.

So there are early Phase I studies looking at some of this, but I think down the line, that’s really what it will be, that once people go into their stringent CRs, MRD undetectable, now what can we do to keep that bone marrow from ever letting it grow again? And I think those are some interesting studies in the future.

Lisa Hatfield:

Okay. Thank you. So some patients are asked questions about the sequencing, and you’d mentioned different therapies. So I’ll ask this really quickly as follow-up, do you have any recommended or are there recommended sequencing of these different therapies like CAR T, then bispecifics, then CELMoDs, not all of them are FDA-approved at this point, but what are your thoughts on sequencing of those therapies?

Dr. Krina Patel:

So my activation tip here is that before you start bispecific therapy, talk to your doctor about CAR T. And the reason I say that is that when you get a bispecific therapy, and currently that is not a fixed duration therapy, it is a continuous therapy. So patients are on it until they relapse. And the problem is that once you relapse on that T-cell therapy, your risk of losing BCMA, losing the antigen is much higher. There are mutations that we’re seeing that most patients get.

So that means the next time we try to use a different BCMA therapy, there’s a big chance it’s not going to work. And we have small studies that show that, that people who get a bispecific, and then we try to go to CAR T for both CAR Ts that the response rates go down and the progression-free survival. So the months that patients get without, needing other therapy goes down for cilta-cel (ciltacabtagene autoleucel) [Carvykti], 33 months in CARTITUDE. It goes down to six months in CARTITUDE-2 where they did CAR T after prior BCMA therapy. That’s a huge drop.

In ide-cel, the real-world data, we saw that after bispecifics, you only get 2.8 months. If you get a CAR T, even though the response rates were still 70, 80 percent, it obviously there are clones that that BCMA isn’t there anymore that we can’t kill. And then it just grows back, right? The other way around, we actually see still a really good response because CAR T is a one-and-done, most of the time, you’re not going to lose BCMA.

So that let’s say a few years later, the myeloma was coming back. It usually has the same BCMA on there. So now I can use a bispecific. And yes, the PFS is still shorter than what you would see if you never had any BCMA therapy. It’s still in the realm of, almost a year, PFS though. So it’s much closer to what we see in the real world for bispecifics than the other way around for CAR T, it’s much, much lower. So we try to do CAR T first then bispecific, if possible. The other part is a T cell. So if you try to make T cells right after someone’s coming off of a bispecific, it is really hard to get T cells that are functional that then we can actually put a CAR into and make it work. So again, why, doing a CAR T first, and then a bispecific makes the most sense for the majority of our patients if they can do it that way.

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CAR T-Cell Therapy for Myeloma | What Are the Advantages?

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CAR T-Cell Therapy for Myeloma | What Are the Advantages? from Patient Empowerment Network on Vimeo.

How has CAR T-cell therapy transformed care for myeloma patients? Myeloma expert and researcher Dr. Beth Faiman shares results from the KarMMa study that compared CAR T-cell therapy versus a standard regimen, and the benefits of this therapy over time.

Dr. Beth Faiman is an Adult Nurse Practitioner in the department of Hematologic Oncology and Blood Disorders at the Cleveland Clinic. Learn more about Dr. Faiman.

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Is CAR T-Cell Therapy Right for You? Questions to Ask Your Myeloma Care Team

 Recovering From CAR T-Cell Therapy | What Can Myeloma Patients Expect

Recovering From CAR T-Cell Therapy | What Can Myeloma Patients Expect?

Transcript:

Katherine Banwell:

Dr. Faiman, from what you’ve described, undergoing CAR T-cell therapy can be a very intense process. Why would someone consider this option over another myeloma treatment option?  

Dr. Beth Faiman:

Yeah. So, the CAR T-cell therapies have really transformed myeloma, in my opinion.  

When we first started using CAR T-cell therapies, there was a long wait list because people who had had three, five, seven, 10, 12 prior therapies, they had very few other options.  

So, we had ethically assigned scores to people as to who – we’d get one or two slots a month and then we’d have 80-some people on this list. And we’re thinking, “How do we allocate who’s going to get this therapy?” And it’s because you can have a nice, long remission off of all therapy.  

It’s a great, great option for most people. Again, I would hope that we can get this moved further into the disease trajectory. There are actually two studies. One was a KarMMa study. It was published in the New England Journal of Medicine in 2023, early part of 2023.  

And it showed that when people get this therapy earlier, the Ide-cel first, you can have a longer remission. So, we’re talking about three, four, five or more prior lines of therapy you can get about 11 months with the Ide-cel.  

You could even get a longer remission off of all therapy if you move it earlier. Same with Cilta-cel. We had studies and different cohorts and you can be in a long remission. So, think of somebody who’s – myeloma’s incurable. It’s very treatable but it’s incurable for most. And so, you go from the expectation of staying on treatment until disease progression, much like other chronic conditions like diabetes. We don’t stop medicine for diabetes or high blood pressure.  

And it’s the same with myeloma and many of the cancers that we treat these days. And so, a CAR T-cell therapy will give patients the option of having that disease free interval where you can go and travel the world. I have patients that have bought RVs after their CAR T-cell therapy and now they’re going around the world – well, not the world. But around the United States.  

Katherine Banwell:

The country. 

Dr. Beth Faiman:

The country. And just really enjoying life and taking that time off and being realistic, knowing that we have to do bloodwork every month to make sure the myeloma’s still in remission because it can come back. But at least it’s sleeping for right now. So, you can go out and enjoy your life and take those trips and enjoy the little things and the big things.