Myeloma: Therapy, excluding Transplantation: Novel Proteasome Inhibitors
799 Carfilzomib-Lenalidomide-Dexamethasone Versus Bortezomib-Lenalidomide-Dexamethasone in Patients with Newly Diagnosed Multiple Myeloma: Results from the Prospective, Longitudinal, Observational Commpass Study
Ola Landgren, et al.
The Abstract concludes: In the CoMMpass study, KRd demonstrated significant improvements in 12-month EFS compared with VRd in patients with NDMM (HR, 0.28; 95% CI, 0.10-0.75; p=0.0043). By 12 months, patients treated with KRd also achieved significantly higher response rates and complete response rates or better compared with VRd treated patients. Discontinuation rates due to AEs were similar between KRd and VRd. With limitations of non-randomized evaluation and relatively short median follow-up in the KRd arm, these results are consistent with previous single arm studies that KRd is not only effective but potentially a superior treatment option compared with VRd for patients with NDMM. Updated results with extended follow-up will be presented.
800 Ixazomib-Thalidomide-Low Dose Dexamethasone (ITd) Induction Followed By Maintenance Therapy with Ixazomib or Placebo in Newly Diagnosed Multiple Myeloma Patients Not Eligible for Autologous Stem Cell Transplantation; Results from the Randomized Phase II HOVON-126/Nmsg 21#13 Trial
Sonja Zweegman, et al.
The Abstract concludes: Induction treatment with 9 cycles of ITd in nte NDMM results in a high ORR of 81%, with 47% ≥ VGPR, independent of age, frailty status and cytogenetic risk. Our placebo controlled randomized phase II trial did not show an improvement in response and PFS with ixazomib maintenance therapy until progression. Ixazomib maintenance did not result in additional toxicity as compared to placebo.
Pieter Sonneveld, et al.
The Abstract concludes: This Phase 2 clinical trial demonstrates that KPd is a feasible, effective and safe triple drug regimen in RRMM patients who have been previously treated and/or are refractory to bortezomib and refractory to lenalidomide. A 87% overall response rate including 31% CR/sCR is clinically relevant in this population. Since median OS has not been reached, longer follow-up is needed.
802 Maintenance with Carfilzomib Following Carfilzomib, Cyclophosphamide and Dexamethasone at First Relapse or Primary Refractory Multiple Myeloma (MM) on the Phase 2 Muk Five Study: Effect on Minimal Residual Disease
Kwee Yong, et al.
The Abstract concludes: Single agent carfilzomib is well tolerated and improves quality of response (increase in MRD negative disease at 6 months). Deepening of response is reflected in the longer PFS associated with K maintenance, in patients completing fixed duration treatment with KCd. The impact of genetic risk on MRD status and conversion, and the impact of conversion on outcomes will be presented at the meeting.
Parameswaran Hari, et al.
The Abstract concludes: Results from this study showed that treatment with OPomD had manageable toxicity in patients with RRMM. The most common AEs observed were gastrointestinal disorders, and most of these were grade 1–2 with no gastrointestinal bleeding reported. Furthermore, OPomD therapy showed promising efficacy, with an objective response rate of 67% for patients in the IR 200-mg/day cohort.
Mark Bustoros, et al.
The Abstract concludes: The combination of ixazomib, lenalidomide, and dexamethasone is an effective and well-tolerated intervention in high-risk smoldering myeloma. The high response rate, convenient schedule with minimal toxicity observed to date are promising in this patient population at high risk of progression to symptomatic disease. Further studies and longer follow up for disease progression are warranted.