BGJ398 is an orally available inhibitor of human FGFRs (IC50s = 0.9, 1.4, and 1 nM for FGFR1, FGFR2, and FGFR3, respectively). It inhibits FGFR4 and VEGFR2 with IC50 values of 60 and 180 nM, respectively, and displays comparatively little activity towards Abl, Fyn, Kit, Lck, Lyn, and Yes (IC50s = 0.3-2.5 μM). BGJ398 has been shown to suppress proliferation of cancer cells with wild-type FGFR3 overexpression (IC50s = 5, 30, 32, and 15 nM, for RT112, RT4, SW780, and JMSU1 cells, respectively). In an RT112 bladder cancer xenograft mouse model overexpressing wild-type FGFR3, BGJ398 inhibited tumor growth after oral administration of 10-30 mg/kg.
