[VIRTUAL] Acquired Mutations in BAX Confer Resistance to BH3 Mimetics in Acute Myeloid Leukemia (ASH 2020)
Background: Recent randomized trials have demonstrated improvements in overall survival (OS) for the BCL-2 inhibitor venetoclax (VEN) in combination with azacitidine and low dose cytarabine in older unfit patients with AML...S63845 and S55746 were obtained from Servier/Novartis, A1155463 from G. Lessene (WEHI), venetoclax and cytarabine from Selleckchem... We identified the presence of BAX mutations in AML samples from patients progressing on VEN-containing regimens. We show that BAX, but not BAK loss in an AML cell line is associated with resistance to BH3-mimetic drug combinations resulting in reduced survival in AML xenograft models. In contrast, BAX deficiency does not impede the cytotoxic actions of conventional chemotherapy.