Venetoclax 400mg Combined with Bortezomib and Dexamethasone Is Efficacious and Feasible for Plasma Cell Dyscrasia

【Abstract】 Objective: To investigate the efficacy and safety of BCL-2 inhibitor Venetoclax (Ven) 400mg combined with bortezomib and dexamethasone in plasma cell dyscrasia with t(11,14). Methods: The data of twenty patients with plasma cell dyscrasia with t (11;14) were retrospectively analyzed.The majority of patients received Venetoclax 400mg combined with bortezomib and dexamethasone. The baseline clinical information, treatment efficacy and adverse effects after Ven-based regimen. Results: Seventeen multiple myeloma patients, two light-chain amyloidosis and one primary plasma cell leukemia (pPCL) patients were studied. Among seventeen MM patients, the median follow-up was 9.0 (0.5-27) months and the median treatment cycles was 4 (1-12);fourteen patients have been evaluated for response rate. The overall response rate for evaluable patients (ORR) was 85.7%, among that one patient (7.1%) achieved CR, four patients (28.6%) achieved VGPR and 7 (50%) achieved PR. The median progression-free survival (PFS) was11.0 months (95%CI 2.1-19.9); the median Overall survival (OS) was 14.0 months (95%CI 6.9-21.1). Two amyloidosis patients achieved VGPR and PR respectively, while one pPCL patient achieved CR. The most common grade 3 or worse treatment-emergent adverse events were thrombocytopenia (15%), infection (10%), neutropenia (5%), diarrhea (5%) and peripheral neuropathy (5%). There was no treatment-related death. Conclusion Ven (400mg) combined with bortezomib and dexamethasone is feasible, tolerated and efficacious in plasma cell dyscrasia.

【Key words】Plasma cell dyscrasia; Venetoclax; Efficacy; Safety