Depth of Response to Isatuximab, Carfilzomib, Lenalidomide and Dexamethasone (Isa-KRd) in Front-Line Treatment of High-Risk Multiple Myeloma: Interim Analysis of the GMMG-CONCEPT Trial

Abstract

Background: High-risk (HR) multiple myeloma (MM) has an impaired prognostic outcome. Addition of anti-CD38 monoclonal antibodies to standard-of-care regimens improved response rates and depth of response. Here, we report a prespecified interim analysis (IA) following induction therapy with the quadruplet regimen isatuximab, carfilzomib, lenalidomide and dexamethasone (Isa-KRd) in newly diagnosed (ND) HR MM patients (pts) in the phase II multicentric GMMG-CONCEPT trial (NCT03104842). \n \nMethods: 153 pts with HR NDMM were enrolled into the trial, the IA reports on the first 50 pts evaluable for IA. Pts receive Isa-KRd in induction, consolidation and Isa-KR maintenance. Transplant eligible pts undergo high-dose therapy. This IA reports on overall response rates (ORR) during induction. \n \nFindings: 50 pts were included in the IA population for ORR. HR MM was defined by del17p in 52%, t(4;14) in 38%, t(14;16) in 12% and > 3 copies 1q21 in 42% and ISS stage 2/3 disease. 46/50 pts completed induction treatment. ORR was 100%, with 5 pts (10·0%) showing partial response (PR), 22 (44·0%; including 4 in arm B) very good partial response (VGPR) and 23 (46·0%) complete response (CR). Hematologic grade 3/4 treatment-emergent adverse events (≥ 10%) were neutropenia (34·0%), leukopenia (26·0%) and thrombocytopenia (14·0%). Main non-hematologic toxicities grade 3/4 were hypertension (12·0%) and infection (8·0%). \n \nInterpretation: We report for the first time on a trial investigating Isa-KRd quadruplet treatment in solely HR NDMM. Isa-KRd induction induces rapid and deep responses. The overall safety profile is consistent with previous reports. \n \nTrial Registration: The trial is registered at clinicaltrials.gov (NCT03104842). \n \nFunding Statement: Study drug and financial support by Amgen, Celgene-BMS and Sanofi. \n \nDeclaration of Interests: \nDr. Leypoldt reports grants and non-financial support from Celgene-BMS, grants and non-financial support from Sanofi, grants and non-financial support from Amgen, during the conduct of the study; non-financial support from GSK, non-financial support from Abbvie, outside the submitted work; \n \nDr. Asemissen has nothing to disclose. \n \nDr. Besemer has nothing to disclose. \n \nDr. Hanel reports personal fees from Celgene, personal fees from Novartis, personal fees from Takeda, personal fees from Amgen, during the conduct of the study; \n \nDr. Blau has nothing to disclose. \n \nDr. Gorner has nothing to disclose. \n \nDr. Ko has nothing to disclose. \n \nDr. Reinhardt reports personal fees from Abbvie, grants from Gilead, personal fees from Merck, other from CDL Therapeutics GmbH, outside the submitted work; \n \nDr. Staib reports grants, personal fees, non-financial support and other from Abbvie, grants, personal fees, non-financial support and other from Amgen, grants, personal fees, non-financial support and other from Celgene, grants, personal fees, non-financial support and other from Janssen-Cilag, grants, personal fees, non-financial support and other from Novartis, grants, personal fees, non-financial support and other from Gilead, grants, personal fees, non-financial support and other from Pfizer, grants, personal fees, non-financial support and other from Roche, outside the submitted work; \n \nDr. Mann has nothing to disclose. \n \nDr. Lutz has nothing to disclose. \n \nDr. Munder reports personal fees and non-financial support from Janssen, personal fees and \nnon-financial support from Amgen, grants from Incyte, personal fees and non-financial \nsupport from BMS, personal fees from Abbvie, personal fees from Sanofi, personal fees from \nGSK, personal fees from Takeda, outside the submitted work; \n \nDr. Graeven reports personal fees from Amgen, personal fees and non-financial support from Boehringer Ingelheim, personal fees from Daichi Sankyo, personal fees from Servier, personal fees from Celgene, personal fees from Astra Zeneca, personal fees from Johnson Johnson, non-financial support from Merck, personal fees from MSD, personal fees from BMS, during the conduct of the study; \n \nDr. Peceny reports grants and personal fees from Sanofi Genzyme, grants from Novartis, grants from DRK Blutspendedienst NSTOB, grants from Boehringer Ingelheim Pharma GmbH & Co KG, grants from Celgene, outside the submitted work; \n \nDr. Salwender reports personal fees from Bristol-Myers Squibb/Celgene, personal fees from Janssen Cilag, personal fees from Glaxo Smith Kline, personal fees from Oncopeptides, personal fees from Takeda, personal fees from Sanofi, personal fees from AbbVie, personal fees from Amgen, outside the submitted work; \n \nDr. Jauch has nothing to disclose. \n \nDr. Zago has nothing to disclose. \n \nAxel Benner has nothing to disclose. \n \nDr. Tichy has nothing to disclose. \n \nDr. Bokemeyer reports personal fees from Sanofi Aventis, personal fees from Merck KgA, personal fees from Bristol-Myers Squibb, personal fees from Merck Sharp & Dohme, personal fees from Lilly Imclone, personal fees from Bayer Healthcare, personal fees from GSO Contract research, personal fees from AOK-Rheinland-Hamburg, personal fees from Novartis, outside the submitted work; \n \nDr. Goldschmidt reports grants, personal fees, non-financial support and other from Amgen, grants, personal fees, non-financial support and other from BMS, grants, personal fees, non-financial support and other from Celgene, grants, personal fees, and other from Chugai, grants, personal fees, non-financial support and other from Janssen, grants, personal fees, non-financial support and other from Sanofi, other from Incyte, other from Molecular Partners, other from Merck Sharp and Dohme (MSD), other from Mundipharma, grants, personal fees, non-financial support and other from Takeda, personal fees and other from Novartis, personal fees from Adaptive Biotechnology, personal fees from GlaxoSmithKline (GSK), outside the submitted work. \n \nDr. Weisel reports grants from AMGEN, grants from Celgene, grants from Sanofi, during the conduct of the study; grants, personal fees and non-financial support from Amgen, personal fees and non-financial support from BMS, grants, personal fees and non-financial support from Celgene, personal fees from Adaptive Biotech, grants, personal fees and non-financial support from Janssen, personal fees and non-financial support from GSK, personal fees from Karyopharm, grants, personal fees and non-financial support from Sanofi, personal fees and non-financial support from Takeda, personal fees from Oncopeptides, personal fees from Roche, outside the submitted work. \n \nEthics Approval Statement: All patients provided written informed consent. The trial was approved by the competent authorities and the Tuebingen University Ethics Committee.