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Discovery of new tetrahydroisoquinolines as potent and selective LSD1 inhibitors for the treatment of MLL-rearranged leukemia.
European Journal of Medicinal Chemistry 2023 May 26
Histone lysine-specific demethylase 1 (LSD1) is a promising target for cancer therapy. Here, we performed the design, synthesis, and extensive structure-activity relationship (SAR) studies based on our previously discovered natural LSD1 inhibitor, higenamine. We found that the tetracyclic tetrahydroisoquinoline FY-21 is a potent and selective inhibitor of LSD1 (IC50 = 340 nM). FY-21 inhibited leukemia cell proliferation and colony formation and increased the level of p53 expression. Meanwhile, FY-21 reduced the mRNA levels of the transcription factors HOXA9 and MEIS1. Furthermore, FY-21 significantly induced leukemia cell differentiation. In vivo studies showed that FY-21 prolonged the survival rate of leukemia mice. Collectively, FY-21 is a potent, selective LSD1 inhibitor and can serve as a lead compound for the development of novel and highly effective LSD1 inhibitors for AML treatment.
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