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- W4385644673 abstract "Background: Despite improvements in the treatment landscape of RRMM with the use of combination therapy, with immunomodulatory (IMiD®) agents, proteasome inhibitors (PIs), and anti-CD38 monoclonal antibodies in front-line and early relapse, patients are becoming TCE earlier in their treatment course. Outcomes in patients with high-risk disease characteristics such as cytogenetic abnormalities, advanced-disease stage, high tumor burden, presence of extramedullary plasmacytoma (EMP), and triple-class–refractory (TCR) disease also remain poor. Ide-cel, a BCMA-directed CAR T cell therapy, significantly improved median progression-free survival (mPFS; 13.3 vs 4.4 months [mo]; HR, 0.49; P<0.0001) and overall response rates (ORR; 71 vs 42%, P<0.001) vs standard (std) regimens in the overall population of patients with TCE RRMM in KarMMa-3 (NCT03651128; Rodríguez-Otero NEJM 2023; DOI: 10.1056/NEJMoa2213614). Aims: To assess the efficacy and safety of ide-cel vs std regimens in patients with high-risk disease characteristics in KarMMa-3. Methods: In KarMMa-3, patients with RRMM who received 2–4 prior regimens, who were TCE (IMiD agent, PI, and daratumumab), and had disease refractory to the last regimen, were randomized 2:1 to receive ide-cel (target dose range: 150–450 x 106 CAR+ T cells) or a std regimen (DPd, DVd, IRd, Kd, or EPd, based on prior regimen, per investigator). Efficacy (PFS, ORR, and complete response rate [CRR]) was assessed in high-risk groups including patients with cytogenetic abnormalities (del[17p], t[4;14], or t[14;16]), R-ISS stage III disease, high tumor burden (≥50% CD138-positive plasma cells in bone marrow), EMP (soft-tissue–only and soft-tissue bone-related plasmacytomas), and TCR (refractory to ≥1 each of an IMiD agent, a PI, and an anti-CD38 antibody). Results: Baseline demographics and high-risk disease characteristics were balanced between treatment arms. Median time to progression on the last prior regimen was short in patients treated with both ide-cel vs std regimens in all high-risk subgroups: cytogenetic abnormalities (5.6 vs 6.7 mo), R-ISS stage III disease (3.9 vs 3.5 mo), high tumor burden (5.1 vs 6.2 mo), EMP (5.1 vs 5.1 mo), and TCR disease (5.6 vs 5.8 mo). At a median follow-up of 18.6 mo (range, 0.4–35.4), mPFS was longer in patients treated with ide-cel vs std regimens in all high-risk subgroups: cytogenetic abnormalities (11.9 vs 4.2 mo; HR, 0.608), R-ISS stage III disease (5.2 vs 3.0 mo; HR, 0.861), high tumor burden (11.0 vs 4.9 mo; HR, 0.595), EMP (7.2 vs 2.0 mo; HR, 0.401), and TCR disease (11.2 vs 3.5 mo; HR, 0.458; Table). ORRs were improved with ide-cel vs std regimens, regardless of the presence of high-risk disease characteristics. Similarly, CRRs were improved in patients treated with ide-cel vs std regimens in all high-risk subgroups: cytogenetic abnormalities (31.8 vs 4.9%), R-ISS stage III (16.1 vs 7.1%), high tumor burden (31.0 vs 8.8%), EMP (23.0 vs 3.1%), and TCR disease (33.5 vs 1.1%). Safety data will be presented. Summary/Conclusion: Patients treated with ide-cel had a lower risk of disease progression or death and higher odds of achieving an overall response (with higher CRRs) compared with patients who received std regimens, regardless of baseline high-risk disease. Overall, these results support use of ide-cel in patients with TCE RRMM, including patients with difficult-to-treat, high-risk disease.Keywords: Clinical trial, Multiple myeloma, High risk, CAR-T" @default.
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- W4385644673 date "2023-08-01" @default.
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- W4385644673 title "S195: IDECABTAGENE VICLEUCEL (IDE-CEL) VS STANDARD REGIMENS IN PATIENTS WITH TRIPLE-CLASS–EXPOSED (TCE) RELAPSED AND REFRACTORY MULTIPLE MYELOMA (RRMM): A KARMMA-3 ANALYSIS IN HIGH-RISK SUBGROUPS" @default.
- W4385644673 doi "https://doi.org/10.1097/01.hs9.0000967692.36989.7b" @default.
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