Mosunetuzumab, A Novel Cd20/Cd3 Bispecific Antibody, In Combination With Chop Confers High Response Rates In Patients With Diffuse Large B-Cell Lymphoma

Introduction: Despite the curative intent of the R-CHOP regimen in the first-line treatment of diffuse large B-cell lymphoma (DLBCL), 35-40% of patients who received R-CHOP will eventually succumb to their disease (Coiffier, et al. Blood 2010; Sarkozy and Sehn. Ann Lymphoma 2019). As such, improved treatments are needed. Mosunetuzumab (Mosun) is a T-cell-engaging bispecific antibody that redirects T cells to eliminate malignant B cells by binding to CD3 on T cells and CD20 on B cells. Mosun monotherapy has a manageable safety profile and promising efficacy, including durable complete responses (CR), in patients (pts) with relapsed and/or refractory (R/R) non-Hodgkin lymphoma (NHL) (Schuster, et al. ASH 2019). This is the first report describing the safety and efficacy of Mosun plus CHOP (M-CHOP) in pts with R/R NHL and newly diagnosed DLBCL in the ongoing GO40515 (NCT03677141) study.