The Attack on Jakafi
by Zhenya Senyak
While medical technology advances in quantum leaps, we still pretty much treat complex illnesses the way we did in ancient times. We relieve symptoms rather than tackle causes which often prove elusive.
Ruxolitinib, one of the genetically designed drugs targeting a mutation often present in myelofibrosis, has been effective not because it affects the disease itself, but allays the symptoms. In MF, one of the more complex, rare and uncharted diseases, the accumulation of fibrosis in the bone marrow replaces the blood producing cells and a cascade of events follows. Anemia and its attendant severe fatigue, is common, as is bleeding as platelet production drops. As blood production moves out of the marrow cavity, the spleen begins to swell, crowding organsm reducing appetite contributing to general wasting and weakness.
The discovery of the JAK2 mutation in MPNs in 2005 presented a likely target for drug development. The Janus Associated Kinases, by signalling cytokines and growth factors, are active in hematopoiesis as well as certain immune functions. Inhibit their action, turn off the switch, and the proliferating blood lines might calm down.
By May, 2007, Incyte-sponsored Phase 1/2 clinical trial of ruxolitinib, a protein kinase inhibitor, opened in the US and, shortly afterward, Europe.
One fact emerged quickly. Ruxolitinib could indeed inhibit expression of the offending JAK2 — possibly JAK 1 as well — without much affecting the concentration of the mutated clone in the patient’s blood. And, in many cases, the drug proved equally effective in significantly reducing spleen size and other symptoms even in those MF patients who didn’t have the JAK2 mutation.
For patients, the worsening of anemia and further reduction of platelets (thrombocytopenia) were notable, and generally manageable, effects. The reduction of spleen size and vast improvement in quality of life tilted the risk/benefit calculation in the drug’s favor. In 2011, ruxolitinib was approved by regulatory bodies for use in the United States and Europe and marketed as Jakafi. But the path to patients would not be easy.
It’s an old and documented complaint.
High-powered, international research and clinical trial is expensive with hundreds of millions of dollars pouring into medical and research centers for a single drug. Sometimes, those who take large amounts of money from drug companies to perform research and clinical trials, are biased, act dishonestly, falsify data or otherwise put their patients at risk in pursuit of profit and self interest.
But this is not a story about that kind of thing. This is about the other side of the coin, about the corrosive effect of undermining our confidence in our doctors, institutions and our meds. There are MF patients living with painfully big spleens today because they or their physicians doubt the safety or efficacy of Jakafi.
Last week, presentations on Jakafi at the meeting of the American Society of Clinical Oncologists (ASCO) were characterized as “..the expected relentless effort by the drug companies and their sponsor-friendly colleagues to undermine important patient safety concerns….”
These aren’t the observations of a wild-eyed radical or a cynical consumer. This is the considered judgment of a respected hematologist and professor at a pre-eminent American institution, a man renowned for his research and compassionate patient care: Ayalew Tefferi of the Mayo Clinic.
Unnamed, but clearly one of the drug companies in the cross-hairs of his remarks: Incyte Corporation. And those “sponsor-friendly colleagues?” If they’re not those doctors who performed the Incyte-sponsored research — and presented posters and Jakafi clinical findings at ASH and at the ASCO meeting — it’s hard to imagine who else they might be.
So the first question we as patients need to ask ourselves is this: Are these doctors — some of them our physicians or personal friends –really making relentless efforts to undermine patient safety concerns”…or is that characterization just hyperbole in support of Tefferi’s serious concerns?
Here are Professor Tefferi’s complete remarks in context, submitted in response to our request for clarification of his position on Jakafi now that the results are in. (We have his permission to quote him verbatim.)
“Facts do not change with time. My views on ruxolitinib and other JAK inhibitors are based on facts from clinical trials and personal experience in using these drugs and they are comprehensively outlined in my recent reports in NEJM, Blood and the Mayo Clinic Proceedings Nothing has changed since other than the expected relentless effort by the drug companies and their sponsor-friendly colleagues to undermine important patient safety concerns and the therapeutic limitations of ruxolitinib. I, for one, have no interest in being a pharmaceutical sales scout and would rather spend my time and energy to seek new and better drugs for my patients. I am old enough to have seen a similar scenario in the past with the use of anagrelide in ET and PV.”
The media continues to be the message
Dr. Tefferi is recognized as a strong and frequently outspoken patient advocate, a deeply compassionate God-fearing man. He has a large and loyal following of patients and colleagues. His warnings and stormings can be fruitful in stimulating discussion and calling attention to potential health issues. But in this case his actions may have unintended consequences.
It has been nine months since Tefferi first publicly voiced his concerns about Jakafi in a letter to the New England Journal of Medicine . Reviewing outcomes for 51 Mayo Clinic patients who participated in the early ruxolitinib Phase 1/2 dosage and toxicity clinical trials over a period of 17 months — starting October, 2007 — the data he saw was startling. Anemia, sharp drop in platelet levels, and serious adverse affects including withdrawal symptoms.
Both the nature and size of the sample he relied on to make his case and the place and timing of its publication caused some dismay within and beyond the medical world. Tefferi’s NEJM letter was published after the successful ruxolitinib Phase III trials , just weeks before Jakafi’s FDA approval and subsequent distribution to MF patients. (Incyte stock declined 6.8% immediately after publication.)
Since then, Dr. Tefferi has published several other high profile papers and letters in the same vein. Last month, again in the NEJM where he concludes rather than seek symptomatic relief through ruxolitinib, patients would be better off entering clinical trial in hope of finding a better drug!
For patients, this is deeply discouraging to read. What point is served by the lengthy clinical trial and FDA approval processes if, at the end, we’re told to take our chances on another and unproven drug?
It will likely be many months before another drug is rigorously tested and approved. Are we supposed to wait, or enter a risky experimental clinical trial, or can we trust our doctors who prescribe the FDA/EMA approved Jakafi, proven over five years of intensive worldwide clinical trial?
Why the New England Journal of Medicine?
Disputes over data interpretation or differences of opinion are a healthy, vital component of professional medical discourse and regularly take place at conferences, universities, medical centers and in the pages of specialized journals But to escalate the volume and extend the contention into the public sector through the NEJM drags untrained patients into the discourse.
The NEJM, the largest paid circulation among medical journals, has over 200,000 subscribers with selected translated articles targetting 140,000 physicians in China. The online NEJM “reaches between 300,000 and 400,000 readers each week…. Studies published in the Journal receive extensive coverage in the news media worldwide, reaching millions of additional health care professionals and patients each week.”
As one of the most published and honored figures in hematology worldwide, Dr. Tefferi’s objections quickly trickled down through consumer publications, social media and word of mouth. One result: For some seriously ill, at-risk myelofibrosis patients, and their personal physicians, Jakafi has become either a game-changing lifeline or a dangerous life-threatening gamble.
What does the data say?
As patients, we need to clear the air of confusion.
(1) Either Jakafi is a good option for us under some circumstances, or not.
(2 Either our physicians are concerned about our health and safety or not.
(3) Either the US Food and Drug Administration (FDA) and the European Medicines Agency (EMA) have fairly evaluated robust data prior to approving this drug, or not.
What we think we know for sure about Jakafi…
Based only on proven claims, Jakafi will not cure MF, will not stop the progression of the disease and will likely contribute to thrombocytopenia (platelet reduction) and anemia.
But the wonder of Jakafi is – in most cases — it will rapidly and significantly reduce the size of our swollen spleens, improve MF symptoms across the board along with our quality of life and produce a durable response. It is relatively safe. The jury’s still out on life extension benefits, but there are promising indications resulting from the COMFORT crossover data. (See Verstovsek”s Therapeutic Advances in MPNs, this issue for data on safety and longevity.)
There is no other drug, JAK inhibitor or not, available to us now with any of that power.
Conclusion: Jakafi is clearly a good option for us under some circumstances. (Dr. Tefferi agrees with that conclusion…but he would severely limit those circumstances.)
Dr. Tefferi is passionate enough about patient safety to have repeatedly voiced his concerns over attendant health issues. But, as patients, we too are concerned. And so, we would like to believe, are our doctors and the ruxolitinib clinical investigators. .
Finally, we know that independent and highly respected research groups in major American and European medical centers have generated reproducible, statistically significant data from long and painstaking ruxolitinib clinical trials, including the large scale double blind gold-standard COMFORT Phase III trials, before publishing their peer-reviewed reports.
Dr. Tefferi is right. Our views, as patients, should be based on facts. In addition to the data published by Dr. Tefferi, here are the facts presented at ASCO, including the poster specifically addressing his concerns. That poster is signed by 19 world-class colleagues.
In this issue, we’re also presenting the full 27-slide educational presentation given by Dr. Verstovsek at ASCO in Chicago last week and short notes from him on how he would treat anemia and thrombocytopenia. We are also linking to articles mentioned by Dr. Tefferi in his e-mail so we can judge for ourselves, as patients, our best options in light of all current findings
Documentary evidence: Finally, we’re publishing Dr. Jason Gotlib’s comprehensive PowerPoint presentation What We Know about Myelofibrosis delivered at the MPN Research Foundation’s meeting in San Mateo, California two weeks ago.
Dr. Gotlib’s views are well worth knowing since he is principal investigator on YMBioscience’s CYT387 (Cytopia), another JAK inhibitor in clinical trial — a drug for which Dr. Tefferi is the Study Chair — and he is a ruxolitinib clinical trial principal investigator at Stanford.
As journalists, we cannot select between alternative professional opinions about a drug’s efficacy. Our job is to present the current state of knowledge of our difficult and sometimes intransigent MPNs to patients and caregivers. As patients we need to be fully informed to participate meaningfully in our treatment. We need all the clarity we can get, all the light of open fact-based discussion…and none of the heat.
We’ve reported results and published graphs and tables submitted to the FDA for Jakafi in the past. Here now is ASCO Poster 6624 presented just a week ago in Chicago, “Adverse Events and the Return of Myelofibrosis Related Symptoms After Interruption or Discontinuation of Ruxolitinib Therapy.” specifically addressing Dr. Tefferi’s concerns. Because of size constraints, it’s difficult to read however the findings are covered in Dr. Verstovsek’s slide presentation and Dr. Gotlib’s PowerPoint presentation. You can however click on the poster graphic to easily see the main points and the names of those who co-authored this report.
The bet of a lifetime
As patients we deeply and truly appreciate Dr. Ayalew Tefferi’s efforts to advance our knowledge, discover therapies and protect our safety. I don’t know all the hematologists who support the COMFORT findings on Jakafi. I’ve talked with some, exchanged views with many and know several personally. I would bet my life they wouldn’t knowingly endanger our health.
In fact, as patients, that’s exactly what we do.
© Zhenya Senyak and MPNforum.com, 2012. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Zhenya Senyak and MPNforum.com with appropriate and specific direction to the original content.
Comments on: "Thank you, Dr. Tefferi. Enough already, please." (13)
Still waiting for a cure for this horrible disease, which can act in many different ways! Hope imetelestat is it! And maybe something with it to finally find a cure for this disease! And yes Thank you Dr. Tefferri and other Doctors for going to extra lengths to help patients to understand and work for a better outcome for their disease! Praying for all as I have watched and cared for a loved one with it!
Carol Orlando ,10 mg of Jakafi twice a day has reduced my friend’s spleen in one week. No side effects so far in one month. He was diag. with CMML only. Using this drug with hopes of gaining weight & spleen reduction. Side effects of Hydra is leukemia…and he’s on that. Hope for the best….
And the combination of Pegasys and Ruxolitinib? I have the impression that these remarks are premature. Mostly all studies with Ruxolitinib are limited to MF. I have JAK + ET and no access to Jak inhibitors. Seemingly Hydrea is still well enough for us, with or without leukemia or skin cancer as a side effect!
I have been on Jakafi for about 9 months and the drug clearly shrunk my spleen but almost instantly after 7 or 8 months it quit working and my spleen started getting much larger very fast. I am now almost out of options. They will radiate my spleen for the 3rd time and start me on interferon, as the Jakafi has clearly quit working.
Hi, Graeme… Sorry to hear that. There is a description of that process discovered by Dr. Ross Levine, covered in the Secrets of JAK inhibition you might want to look over. It suggests that, after a short period off the med, it might become effective again. Also… you might want to look at the combo drug story reported by Dr. Hasselbalch in the current issue of MPNforum.
This is an excellent review of the current science related to Jakafi. Basic message- focus on the evidence (well summarized here)
Let’s all move on from Tefferi. It’s clear by now that Jakafi has been a great success for most MF patients and clearly reduces symptoms and prolongs life. It is safe. It can also slow or halt progression, which isn’t discussed often. When Jakafi is working, patients do not increase fibrosis. Those that achieve a 50% reduction in spleen volume, may see a much longer benefit. Yes, I hope for better drugs, but I’ll take what is available now.
One point Teferri does make, and it isn’t discussed elsewhere is Jakafi is not durable in many patients. It seems to stop working after a period of time. I had to increase my dose from 15mg to 20mg when my night sweats returned and my spleen began to enlarge. This was after 9 months. I think at some point I will have to increase the dose even more, and eventually it will stop working altogether.
What we need now is to find a way to take advantage of the stability Jakafi offers while it is working. Combination therapy may be the answer. Pegasys is my choice. It has been proven to reduce JAK burden and repair marrow. Other combinations should also be tried to control or reverse MF.
With Ellen, I see we need to be scientists to even start to understand this “mess”. I call it a mess because to me it is a mess. No matter how much researchers have sought help, it is a bandaid.
I just took p32 (radiation) for polycythemia vera. This is because ALL of the usual chemos caused side effects worse than the disease, crippling ones. Probably because I have Porphyria too. The p32 worked. Lowered my platelets to almost normal in a month. Made my feet feel like walking again, wearing some shoes I could not wear for years. Local heme is amazed.
However, we know radiation is dangerous, may shorten life. It’s scary. But like some with MF, I finally decided to do it in the way they decided to try Jak drug.
I am glad Teferri is honest. I wonder if he’s as honest about HU, which he recommends, I believe, for PV. It can be a mess too. It was a mess for me on three separate tries. As was 3 kinds of interferon and angrelide. But I guess I’m “unique”. Johns Hopkins doctors said as much. Unique is a mess!
I too appreciate Dr. Tefferi’s commitment to communicating with us even when what we hear from him may not be what we most desire to hear. I’m reading “The Emperor of Maladies” , which records how, throughout the history of cancer research, the rough and tumble of competing opinions and interpretations has contributed to the goal of truth seeking.
Thank you Diane for the opportunity to underscore the main points of our article… and thank you Marcia and congratulations on your appointment as MPN-NET Listowner. Just to make it unanimous, I too appreciate Dr. Tefferi’s concerns for patient safety and am certain we made that manifestly clear in our article. This is not about Dr. Tefferi’s concerns but clarifying the issue for MPN patients. The sheer weight of multi-site, reproducible, robust data submitted by equally respected hematologists and clinical investigators and accepted, after long clinical trial, by both the FDA and the EHA means we, as MF patients, can accept Jakafi with confidence if prescribed by our hematologists. The preponderance of evidence, much of which we presented in the article, overwhelmingly stands in favor of Jakafi for MF patients with splenomegaly and other QOL issues.
I appreciate Dr. Tefferi’s commitment to highlighting his numerous concerns on the new Jakafi drug. And no, its NOT enough already. As many in the MPN community have learned the hard way, there are many hemotologists/oncologists treating MF patients with a limited knowledge of our disease. I think Tefferi’s voicing his concerns in the NEJM and other widely read sources are the best way to make the wider audience aware of the serious risks for some patients of Jakafi. I doubt the drug reps pushing this new med to these MDs will bother to do so.
Excellent information; I will certainly give this a lot of thought. I certainly thank Dr. Tefferi along with the other MPD experts for taking the the time to share their knowledge with us.
I feel like I need to go back to school to get another degree in science! Clearly, it’s important to really understand the primary source materials on Jakafi – otherwise, you won’t understand how the risks and benefits apply to you. It’s a lot easier to follow the personal stories on lists and judge the drug by how many “my spleen is shrinking!”s get posted vs. “doesn’t seem to be helping”. I suppose this does not constitute a rigorous scientific approach.