Preclinical Assessment of CDR101 - a BCMAxCD3xPD-L1 Trispecific Antibody with Superior Anti-Tumor Efficacy

BCMAxCD3 targeting therapies have demonstrated anti-myeloma activity, and high minimal residual disease negativity rates can be achieved with this approach in heavily pre-treated patients with relapsed or refractory multiple myeloma (RRMM). Despite these promising clinical results, patients eventually develop resistant disease and relapse. Thus, there is a high need for novel BCMA therapies that can evade the resistance mechanisms and provide more durable responses. Recently, we reported on the promising activity of the Local Activator and T cell Engager (LocATE) technology, a trispecific molecule that targets CD3, BCMA and PD-L1, redirecting T cells to multiple myeloma (MM) cells while selectively counteracting PD-L1/PD-1 induced immunosuppression at the immune synapse (ASH, 2020). Here we present CDR101, an optimized LocATE candidate with potential for clinical development.