Combined Blockade of CD47-Sirpa Interaction By 5F9 (Magrolimab) and Azacitidine/Venetoclax Therapy Facilitates Macrophage-Mediated Anti-Leukemia Efficacy in AML Pre-Clinical Models

CD47 expressed on cells functions as a “don't eat me” signal by binding SIRPa on macrophages and blocking phagocytosis. Cancer cells including AML evade phagocytosis by overexpressing CD47, and high CD47 expression in AML has been associated with inferior outcomes. Here we studied the pre-clinical activity of the 5F9 (magrolimab), an antibody that blocks the CD47, combined with BCL-2 inhibitor venetoclax with azacitidine (VEN/AZA) in AML both in vitro and in vivo.