Abstract:Introduction: Cancer cell-intrinsic CYP monooxygenases promote tumor progression. In ER+ breast cancer cells, CYP3A4 is required for tumor growth and localizes to mitochondria where it promotes electron transport chain and respiration, while suppressing autophagy, in part, through epoxyeicosatrienoic acid (EET) biosynthesis (1). The diabetes drug metformin inhibited CYP3A4-mediated EET biosynthesis and depleted cancer cell-intrinsic EETs. Metformin bound to the active site heme of CYP3A4 in a co-crystal struct… Show more
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