Safety and Efficacy of Venetoclax (VEN) in Combination with Bendamustine (B) Plus Rituximab (R) or Obinutuzumab (G) in Patients (pts) with Previously Untreated Chronic Lymphocytic Leukemia (CLL): Results from a Phase Ib Study (GO28440)

ConclusionVEN 400mg daily combined with BR or BG in 1L CLL treatment was associated with toxicity leading to treatment interruptions and discontinuations; the most frequently reported toxicities were hematologic. However, despite dose modifications, all pts responded to treatment, independently of subgroups. 50% of pts achieved a CR/CRi; higher than previously reported with BG or BR alone (Brown et al. Blood 2015; Michallet et al. Haematologica 2018). Responses were durable and preliminary PFS data are encouraging. Response rates were similar, irrespective of whether pts received planned 6 or fewer cycles of B; the optimal number of B cycles and general benefit of B in combination with R-VEN or G-VEN should be examined further with longer follow-up. No marked differences in quality of clinical responses were observed when VEN was combined with BR or BG. Updated MRD data will provide a better understanding of the efficacy of these combination regimens compared with backbone chemo-free regimens.DisclosuresStilgenbauer: GSK: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Genzyme: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Genentech: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research ...
Source: Blood - Category: Hematology Authors: Tags: 642. CLL: Therapy, excluding Transplantation: Poster I Source Type: research