TAS-119 is a potent, selective and orally active Aurora A inhibitor with an IC50 of 1.0 nM. TAS-119 shows high selectivity for Aurora A over other protein kinases, including Aurora B (IC50 of 95 nM). TAS-119 has potent antitumor activites.IC50 & Target: IC50: 1.0 nM (Aurora A); 95 nM (Aurora B)In Vitro: TAS-119 enhances the antiproliferative effect of Paclitaxel in a variety of human cancer cell lines, including Paclitaxel-resistant cells.
TAS-119 (30-300 nM) dose dependently enhances cell growth inhibition by three taxanes (Paclitaxel, Docetaxel, and Cabazitaxel) in HeLa cells. TAS-119 induces mitotic accumulation predominantly in tumor cells, compared with that in normal diploid fibroblasts.In Vivo: TAS-119 (5-30 mg/kg; oral administration; twice daily on day 1 and everyday on day 2) treatment induces phosphorylated histone H3 (pHH3) in nude rats with the HeLa-luc xenografts.