ASH 2011 – Initial Thoughts On The Meeting's Key Myeloma-Related Findings

It has been ten days since the 2011 annual meeting of the American Society of Hematology (ASH) came to a close.
Since the meeting started, The Beacon has been providing detailed coverage in the form of discussion forum postings, daily updates, and in-depth articles about key research findings.
In this and The Beacon's next article about the meeting, however, the perspective changes a bit.
The focus shifts to the bigger picture -- to questions like: "What was the impact of the meeting?", and "What are the meeting's implications for the treatment of myeloma patients in the near future?"
There was so much research presented at the meeting that it is still a challenge to answer such questions definitively.
For some initial thoughts about "the big picture," however, The Beacon turned to its Medical Advisors -- the talented myeloma specialists who share their knowledge and expertise in the Beacon's discussion forum.
The Medical Advisors were asked for their initial thoughts on what the top research findings of the meeting were, and also what they considered to be the "hidden gems" of the meeting.
This article passes along the responses The Beacon received regarding the top research findings. A future article will review the responses regarding "hidden gems."
Dr. Peter Voorhees from the University of North Carolina at Chapel Hill:
The updated data presented on the use of the next generation immunomodulatory agent, pomalidomide, and the next generation proteasome inhibitor, carfilzomib, remained promising.
Newly presented data on Millennium's novel oral proteasome inhibitor, MLN9708 (ixazomib), grabbed a lot of attention (see related Beacon news). The data in heavily pretreated patients was respectable, and the results of MLN9708 in combination with Revlimid (lenalidomide) and dexamethasone (Decadron) in newly-diagnosed myeloma patients were impressive, with a response rate of 100 percent (although the number of patients treated with this regimen thus far is small).
Notably, peripheral neuropathy was not as common and was of lesser severity when compared with historical results for Velcade (bortezomib).
If these results hold up, MLN9708 may provide a way to treat patients with user-friendly, all-oral proteasome inhibitor and immunomodulatory agent combinations.
It remains difficult to determine what new class of drugs will next break out onto the myeloma scene.
Results from the Phase 3 study of the histone deacetylase inhibitor, Zolinza (vorinostat), in combination with Velcade, were presented. Although the response rate with Velcade and Zolinza was clearly higher than with Velcade alone, there was no clinically significant difference in progression-free survival.
Nonetheless, the response rate was higher with the combination and the data from the Phase 2 study of Velcade and Zolinza in patients with relapsed and refractory myeloma were encouraging. As such, further investigation of this class of agents is warranted.
Updated results from the Phase 2 study of the anti-CS1 monoclonal antibody, elotuzumab, in combination with Revlimid and dexamethasone were quite impressive, producing response rates that were higher than what would be expected for Revlimid and dexamethasone alone (see related Beacon news).
Ongoing Phase 3 trials in relapsed patients and newly-diagnosed, transplant-ineligible patients comparing Revlimid and dexamethasone with or without elotuzumab will help determine the role of this drug in myeloma therapy.
Dr. Ken Shain from the Moffitt Cancer Center in Tampa:
I continue to be impressed by the activity of the CS-1 antibody elotuzumab presented by Dr. Sagar Lonial from the Winship Cancer Institute in Atlanta in an oral session Monday morning.
This monoclonal antibody continues to demonstrate excellent combination activity with Revlimid and low-dose dexamethasone in the relapsed setting.
Overall response rates were as high as 92 percent in the 10 mg/kg dosing group; very good partial response rates were in the 40 plus percent range. And, importantly, the regimen was well tolerated with appropriate premedication therapy.
Therefore, Dr. Lonial and colleagues have identified a novel combination therapy that may have a significant impact on how we treat myeloma in the very near future.
I always feel that the relapsed and refractory populations are the patients that need the most assistance in a disease where cure is not yet an endpoint.
To this end, the better tolerated and more active compounds and combination therapies we have available to us, the better.
Dr. Adam Cohen from the Fox Chase Cancer Center in Philadelphia:
There were no truly practice-changing data presented for myeloma at ASH this year.
However, a few noteworthy studies with emerging agents stood out -- two studies with encouraging results, and one with disappointing outcomes.
Dr. Andrzej Jakubowiak of the University of Chicago presented updated data on the use of carfilzomib in combination with Revlimid and dexamethasone for newly-diagnosed myeloma.
Of 53 patients, 94 percent responded, with 53 percent achieving near complete or complete remission, and after a median of eight cycles of therapy, there were no cases of severe peripheral neuropathy, which is a big change from Velcade-based induction regimens.
Median follow-up is only 9.5 months, so we need to wait and see how durable these responses will be.
Dr. Paul Richardson from the Dana-Farber Cancer Institute presented results from a randomized Phase 2 study of pomalidomide plus dexamethasone versus pomalidomide alone in 221 heavily pretreated relapsed/refractory patients.
The overall response rate was 34 percent for pomalidomide plus dexamethasone, versus 13 percent for pomalidomide alone.
Importantly, the overall response rate was 30 percent in patients refractory to Velcade and Revlimid -- a group with few currently available options.
Finally, Dr. Meletios Dimopoulos from the University of Athens in Greece reported the first results from the VANTAGE 088 trial, the first randomized Phase 3 study comparing the HDAC inhibitor Zolinza plus Velcade to Velcade alone in relapsed myeloma patients.
The response rate was higher in the combination arm (56 percent versus 41 percent), and the trial did meet its primary endpoint, which was to improve progression-free survival.
However, this improvement was only 0.8 months (7.6 months for Zolinza plus Velcade versus 6.8 months for Velcade alone). There was no significant difference in overall survival, and toxicity was significantly greater in the combination arm.
So this was hardly a home run -- maybe a bunt single? -- and not likely to change practice.
Note: The Advisor responses summarized above have been edited slightly for length, flow, and adherence to Beacon conventions (regarding, for example, drug names).
Related Articles:
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- Nelfinavir-Velcade Combination Very Active In Advanced, Velcade-Resistant Multiple Myeloma
- Nelfinavir Shows Only Limited Success In Overcoming Revlimid Resistance In Multiple Myeloma Patients
- Adding Clarithromycin To Velcade-Based Myeloma Treatment Regimen Fails To Increase Efficacy While Markedly Increasing Side Effects
Thanks for this ASH 2011 summary from the various myeloma specialists. As a patient, I appreciate the perspective of practioners other than my own. Thanks for all of your hard work this year, MB staff. Here's to an exciting 2012 for all in Myelomaville!