MK-5108

MK-5108 is a highly potent and specific inhibitor of Aurora A kinase with an IC₅₀ value of 0.064 nM. IC50 & Target: IC50: 0.064 nM (Aurora-A kinase)^[1] In Vitro: MK-5108 inhibits Aurora-A activity with an IC₅₀ value of 0.064 nM in an ATP-competitive manner. It shows robust selectivity against the other family kinases Aurora-B (220-fold) and Aurora-C (190-fold). MK-5108 also exhibits high selectivity for Aurora-A over other protein kinases. MK-5108 inhibits the growth of 14 cell lines with IC₅₀ values between 0.16 and 6.4 μM^[1]. In Vivo: MK-5108 treatments at 15 and 30 mg/kg results in significant tumor growth inhibition in the HCT116 tumor model. MK-5108 is well tolerated at both doses, with minimal reduction in body weight. MK-5108 also exhibits significant antitumor activity in nude rats bearing SW48 tumors. MK-5108 at 15 and 45 mg/kg causes dose-dependent tumor growth inhibition with a %T/C of 35% and 7% at day 10, and 58% and 32% at day 27, respectively. MK-5108 is well tolerated in nude rats, with no body weight reduction and moderate effect on blood cells^[1].