Advancing Therapies for Polycythemia Vera: Enhancing Control and Quality of Life
How are emerging polycythemia vera (PV) treatments addressing quality of life? Expert Dr. Andrew Kuykendall from Moffitt Cancer Center discusses disease control versus quality of life issues for PV patients and shares updates about rusfertide and hepcidin mimetic clinical trials.
[ACT]IVATION TIP
“…there’s a lot of things that factor into a suboptimal quality of life for patients with PV. And we need to think about all of those as we try to chip away and make patients’ quality of life as good as possible.”
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Transcript:
Lisa Hatfield:
Dr. Kuykendall, since current treatments may help control polycythemia vera but don’t significantly improve symptoms, what steps are being taken to develop new therapies that not only control PV, but also improve patients’ overall quality of life?
Dr. Andrew Kuykendall:
Yeah, so right now the therapies we have for polycythemia vera essentially the main goal is to reduce as I tell patients, to reduce the things that could kill you, right? To reduce the risk of thrombotic events, cardiovascular events, strokes, blood clots, heart attacks, things like that. As we know that that is a huge issue for these patients that are at increased risk for cardiovascular events.
So we do that with a variety of different strategies, but I think increasingly what we’re realizing is we need to make a primary focus of treatment being on improving and maximizing quality of life. And this is something that really we should be thinking about across all malignancies. But specifically polycythemia vera (PV), where this is a disease that if we are able to avoid some of these cardiovascular events, patients have a very good quantity of life expected with their disease.
So they may live with their disease for 15, 20, 30 years. So if that’s the case, we really need to be thinking about how we can do that as best as possible, right? We’re talking about a third of your life living with this disease. And so we need to do that in a quality way. So agents like ruxolitinib (Jakafi) that have been approved for polycythemia vera in the second-line setting.
Ruxolitinib is known that it is improving some of the disease-related symptoms that come with PV, fevers, chills, itching, night sweats, bone pain really does help with those things. But I think that we can move beyond that. And we’re developing agents like rusfertide. Rusfertide is the hepcidin mimetic that is aiming to reduce the amount of phlebotomies patients need. And for me, that’s important in a variety of ways.
One if you don’t need to get phlebotomies all the time, you’re not tied to the healthcare system, right? Nearly as much. And that could be a huge dissatisfactor. And so at the same time, getting a phlebotomy is not that fun either. It requires going in and sitting there getting blood drawn, you may get lightheaded, fatigued that comes with that.
So eliminating that aspect of negative quality of life. At the same time, we’re starting to see with rusfertide whispers that it may help with some of these symptoms that may be related to iron deficiency. Things like brain fog, concentration issues, fatigue. And so if we can help a little bit with that aspect of things too, man, we could start to kind of, you know, chip away at some of the quality of life issues that are ongoing.
And then down the road, I think some of these JAK2-specific inhibitors may have the continued ability to modify the underlying disease. And certainly that’s a huge goal, right? If we can actually start to get true responses really get at the core of the disease to get the disease to go away. And I think that ultimately that will hopefully result in better quality of life as well. So, at the same time, I think my [ACT]IVATION tip for this question is that there’s a lot of things that factor into a suboptimal quality of life for patients with PV. And we need to think about all of those as we try to chip away and make patients’ quality of life as good as possible.
Lisa Hatfield:
Okay. Thank you. And is there any hope of any of these newer therapies being of limited duration, or are all of them continuous therapy? Because I know as a patient myself, that quality of life is impacted by knowing that I’ll be on therapy forever, some kind of therapy forever. Any hope for that?
Dr. Andrew Kuykendall:
Yeah, so certainly with some agents there is hope for that. So some of the agents I referenced, ruxolitinib, rusfertide, these are agents that probably are, are going to be continued therapy. We always call it indefinite, right? As long as we think that the benefits outweigh the risks, we continue that. If we stop those, typically the reasons we’re using them, those come back quite quickly.
But I would say it’s not necessarily the case with agents like interferon. So interferon is an agent that’s less associated with symptomatic improvement, although we do see it in a subset of patients, it’s more associated with the ability to potentially modify the underlying disease. And so what we’ve seen with interferon is that we can measure patients’ JAK2 allele burdens, the number of cells that have the JAK2 mutation that drives the disease.
And in patients that are on interferon for 2, 3, 4 years, we see the number of cells that have the JAK2 mutation go down over time quite consistently. And even in the case that in some patients it goes less than 10 percent or to a level, we really can’t pick it up with our standard testing. And my experience with that is we can actually stop interferon in some of these patients for a pretty extended period of time.
So we have patients where we stopped for one or two years with blood counts that remain quite well-controlled, patients feeling well. In time, we might have to restart it as things start to to pop up, but I think that we are starting to get to these kind of at least treatment reductions, dose reductions where we can spread things out, but also kind of brief treatment interruptions where we get this kind of treatment-free period that certainly can be attractive to some patients.
Lisa Hatfield:
Okay. Thank you. And I’ll just do a quick shoutout to physicians like yourself who deal primarily with MPNs or work a lot with MPNs, that if a patient is watching this and doesn’t have somebody who really specializes in MPNs, everything you’re talking about, clinical trials, it might be helpful even to just get a consult or what I call an expert or second opinion on how to manage your MPNs. So anyway, thought I’d throw that out there. Thank you.
