Session: 653. Myeloma/Amyloidosis: Therapy, excluding Transplantation: Poster I
STUDY DESIGN: KarMMa-4 is enrolling patients with NDMM who have high-risk disease, defined as R-ISS stage III (ISS stage III [serum b2 microglobulin ≥ 5.5 mg/L] and cytogenetic abnormalities t(4;14), del(17p), and/or t(14;16) by interphase fluorescence in situ hybridization; or ISS stage III and serum lactate dehydrogenase > upper limit of normal). Patients must have received ≤ 3 cycles of the induction regimens listed below, be aged ≥ 18 years, and have Eastern Cooperative Oncology Group performance status 0-1. Patients with nonsecretory myeloma or central nervous system involvement are excluded.
Patients can enroll between cycle 1 and cycle 3 of induction. Permitted induction regimens for cycle 1 are carfilzomib + lenalidomide + dexamethasone ± daratumumab (KRd ± DARA), lenalidomide + bortezomib + dexamethasone ± daratumumab (RVd ± DARA), or cyclophosphamide + bortezomib + dexamethasone (CyBorD). Induction regimens for cycles 2-4 are limited to KRd or RVd, with dexamethasone omitted during cycle 3. All patients will undergo leukapheresis for T cell collection after cycle 3, and ide-cel will be manufactured during cycle 4 of induction. Stem cell collection for future use may be conducted after cycle 3 (following leukapheresis) or cycle 4 (before lymphodepletion). Ide-cel is infused after 2 days of rest following lymphodepletion with 3 days of fludarabine 30 mg/m2 + cyclophosphamide 300 mg/m2. Lenalidomide-based maintenance may be provided upon bone marrow recovery or 90 days after ide-cel infusion, whichever is later.
The primary endpoints are dose-limiting toxicity and safety. Secondary endpoints include complete response rate and overall response rate, duration of response, time to complete response, time to start of maintenance, feasibility of initiating maintenance, PFS, overall survival, and pharmacokinetics. Exploratory endpoints include safety of lenalidomide maintenance therapy, minimal residual disease, immunogenicity and biomarkers.
The starting ide-cel target dose is 450 × 106 CAR+ T cells, with dose escalation/de-escalation (150, 300, and 800 × 106 CAR+ T cells). After identification of the optimal target dose, 12 patients will be enrolled in the dose-expansion phase. KarMMa-4 is registered at ClinicalTrials.gov: NCT04196491.
Disclosures: Usmani: Amgen: Consultancy, Honoraria, Other: Speaking Fees, Research Funding; BMS, Celgene: Consultancy, Honoraria, Other: Speaking Fees, Research Funding; GSK: Consultancy, Research Funding; Array Biopharma: Research Funding; Pharmacyclics: Research Funding; Incyte: Research Funding; Merck: Consultancy, Research Funding; Seattle Genetics: Consultancy, Research Funding; SkylineDX: Consultancy, Research Funding; Janssen: Consultancy, Honoraria, Other: Speaking Fees, Research Funding; Takeda: Consultancy, Honoraria, Other: Speaking Fees, Research Funding; Sanofi: Consultancy, Honoraria, Research Funding; Abbvie: Consultancy; Celgene: Other. Berdeja: Abbvie: Research Funding; Amgen: Consultancy, Research Funding; Acetylon: Research Funding; Celgene: Consultancy, Research Funding; Constellation: Research Funding; Cellularity: Research Funding; CRISPR Therapeutics: Consultancy, Research Funding; BMS: Consultancy, Research Funding; Bluebird: Research Funding; Bioclinica: Consultancy; Novartis: Research Funding; Poseida: Research Funding; Prothena: Consultancy; Teva: Research Funding; Servier: Consultancy; Takeda: Consultancy, Research Funding; Genentech, Inc.: Research Funding; Glenmark: Research Funding; Janssen: Consultancy, Research Funding; Karyopharm: Consultancy; Lilly: Research Funding; Legend: Consultancy; Kite Pharma: Consultancy; Kesios: Research Funding; CURIS: Research Funding; EMD Sorono: Research Funding; Vivolux: Research Funding. Truppel-Hartmann: bluebird bio, Inc: Current Employment, Other: TRAVEL, ACCOMMODATIONS, EXPENSES (paid by any for-profit health care company); F. Hoffmann La Roche: Current equity holder in publicly-traded company, Ended employment in the past 24 months. Casadebaig: Bristol-Myers Squibb Company: Current Employment. Wortman-Vayn: Bristol-Myers Squibb Company: Current Employment. Shelat: Bristol-Myers Squibb Company: Current Employment. Novick: Bristol-Myers Squibb Company: Current Employment. Shah: GSK, Amgen, Indapta Therapeutics, Sanofi, BMS, CareDx, Kite, Karyopharm: Consultancy; BMS, Janssen, Bluebird Bio, Sutro Biopharma, Teneobio, Poseida, Nektar: Research Funding.
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