Key Points• The sequential and alternating administration of VMP and Rd have equal efficacy and toxicity.• The greatest benefit of this total therapy approach was observed for patients aged 65 to 75 years.Bortezomib plus melphalan and prednisone (VMP) and lenalidomide plus low-dose dexamethasone (Rd) are 2 standards of care for elderly untreated multiple myeloma (MM) patients. We planned to use VMP and Rd for 18 cycles in a sequential or alternating scheme. Patients (233) with untreated MM, >65 years, were randomized to receive 9 cycles of VMP followed by 9 cycles of Rd (sequential scheme; n 5 118) vs 1 cycle of VMP followed by 1 cycle of Rd, and so on, up to 18 cycles (alternating scheme; n 5 115). VMP consisted of one 6-week cycle of bortezomib using a biweekly schedule, followed by eight 5-week cycles of once-weekly VMP. Rd included nine 4-week cycles of Rd. The primary end points were 18-month progression free survival (PFS) and safety profile of both schemes. The 18-month PFS was 74% and 80% in the sequential and alternating arms, respectively (P 5 .21). The sequential and alternating groups exhibited similar hematologic and nonhematologic toxicity. Both arms yielded similar complete response rate (42% and 40%), median PFS (32 months vs 34 months, P 5 .65), and 3-year overall survival (72% vs 74%, P 5 .63). The benefit of both schemes was remarkable in patients aged 65 to 75 years. In addition, achieving complete and immunophenotypic response was associated with better outcome. The present approach, based on VMP and Rd, is associated with high efficacy and acceptable toxicity profile with no differences between the sequential and alternating regimens. This trial was registered at www.clinicaltrials.gov as #NCT00443235. (Blood. 2016;127(4):420-425)
IntroductionMultiple myeloma (MM) is the second most frequent hematologic disease. Two-thirds of newly diagnosed patients are older than 65 years.
1Treatment options for this patient population have previously been limited to alkylators, but new up-front combinations based on novel drugs, with or without alkylating agents, have significantly improved outcomes.2 Findings from 6 randomized trials showed that melphalan, prednisone, and thalidomide (MPT) was better than melphalan plus prednisone in terms of response rate and progression-free survival (PFS), with increased overall survival (OS) reported in 3 out of 5 trials. To date, MPT has been considered a standard of care.3 Bortezomib plus melphalan and prednisone (VMP) is another standard of care for elderly MM patients based on the VISTA (Velcade as Initial Standard Therapy in Multiple Myeloma) trial, in which VMP proved to be superior to melphalan and prednisone with an OS 4 benefit of 13 months. Moreover, bortezomib was subsequently optimized through weekly administration, which significantly improved tolerability but had no impact on the efficacy; this VMP "lite" is widely used in clinical practice.5 Concerning lenalidomide, the FIRST (Frontline Investigation of Lenalidomide plus dexamethasone vs Standard ...