Conference Proceedings

Initial Clinical Activity and Safety of BFCR4350A, a FcRH5/CD3 T-Cell-Engaging Bispecific Antibody, in Relapsed/Refractory Multiple Myeloma

Adam D Cohen, Simon J Harrison, Amrita Krishnan, Rafael Fonseca, Peter A Forsberg, Andrew Spencer, Jesus G Berdeja, Jacob P Laubach, Mengsong Li, Voleak Choeurng, Anjali Vaze, Divya Samineni, Teiko Sumiyoshi, James Cooper, Bernard M Fine, Suzanne Trudel

Blood | American Society of Hematology | Published : 2020


Introduction: New targets and treatment modalities are needed for multiple myeloma (MM). Fc receptor-homolog 5 (FcRH5) is a type I membrane protein that is expressed on B cells and plasma cells, and is found on myeloma cells with near 100% prevalence. BFCR4350A, a humanized immunoglobulin G-based T-cell-engaging bispecific antibody (bsAb), targets the most membrane-proximal domain of FcRH5 on myeloma cells and CD3 on T cells. Dual binding facilitates efficient immunological synapse formation, resulting in T-cell activation and potent killing of myeloma cells (Li et al. Cancer Cell 2017). GO39775 (NCT03275103) is an ongoing, multicenter Phase I trial evaluating the safety, activity, pharmacod..

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