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IPI-9119 is an orally active, selective and irreversible FASN inhibitor with an IC50 of 0.3 nM in vitro biochemical assay. IPI-9119 inhibits tumor growth of castration-resistant prostate cancer (CRPC) xenografts mouse models[1][2].

IPI-9119 is an orally active, selective and irreversible FASN inhibitor with an IC50 of 0.3 nM in vitro biochemical assay. IPI-9119 inhibits tumor growth of castration-resistant prostate cancer (CRPC) xenografts mouse models[1][2]. IPI-9119 inhibits FASN in cellular occupancy assays (IC50～10nM), and shows more than 400-fold selectivity against several additional serine hydrolases[2]. IPI-9119 (0.1-0.5 μM; 6 days) inhibits cell growth and induces cell cycle arrest, apoptosis[1]. IPI-9119 (0.05-5 μM; 6 days) inhibits AR-FL and AR-V7 protein expression[1]. IPI-9119 (SC pump infusion; 0.5 μL/h; 100 mg/mL; for 28 days) inhibits tumor growth of CRPC xenografts mouse models[1].

[1]. Giorgia Zadra, et al. Inhibition of de novo lipogenesis targets androgen receptor signaling in castration-resistant prostate cancer. Proc Natl Acad Sci U S A. 2019 Jan 8;116(2):631-640. [2]. Erin Broph, et al. Abstract 1891: Pharmacological target validation studies of fatty acid synthase in carcinoma using the potent, selective and orally bioavailable inhibitor IPI-9119.