CHMFL-ABL/KIT-155

CHMFL-ABL/KIT-155 (CHMFL-ABL-KIT-155; compound 34) is a highly potent and orally active type II ABL/c-KIT dual kinase inhibitor (IC₅₀s of 46 nM and 75 nM, respectively), and it also presents significant inhibitory activities to BLK (IC₅₀=81 nM), CSF1R (IC₅₀=227 nM), DDR1 (IC₅₀=116 nM), DDR2 (IC₅₀=325 nM), LCK (IC₅₀=12 nM) and PDGFRβ (IC₅₀=80 nM) kinases. CHMFL-ABL/KIT-155 (CHMFL-ABL-KIT-155) arrests cell cycle progression and induces apoptosis^[1]. IC50 & Target: IC50: 46 nM (type II ABL), 75 nM (c-KIT), 81 nM (BLK), 227 nM (CSF1R), 116 nM (DDR1), 325 nM (DDR2), 12 nM (LCK), 80 nM (PDGFRβ)^[1] In Vitro: CHMFL-ABL/KIT-155 (CHMFL-ABL-KIT-155) exhibits anti-proliferation activities in the BCR-ABL dependent CML cancer cell lines such as K562 (GI₅₀: 0.027 µM), MEG-01 (GI₅₀: 0.02 µM), and KU812 (GI₅₀: 0.056 µM). It also potently inhibits the growth of c-KIT dependent GISTs cancer cell lines including GIST-T1 (GI₅₀: 0.023 µM), GIST-882 (GI₅₀: 0.095 µM) but not c-KIT independent GIST-48B (GI₅₀: 3.96 µM) ^[1]. In Vivo: CHMFL-ABL/KIT-155 (CHMFL-ABL-KIT-155) (25-100 mg/kg; p.o.; once daily for 28 days) shows dose-dependent tumor progression suppression without apparent toxicity in female nu/nu mice bearing established K562 tumor xenografts^[1].