MPI-0479605 is a potent and ATP-competitive inhibitor of the mitotic kinase MPS1 (IC50 = 1.8 nM). It is selective for MPS1 over a panel of 79 kinases at a concentration of 500 nM. MPI-0479605 induces time-dependent degradation of cyclin B and securin and decreases phosphorylation of BUBR1 resulting in failed cytokinesis in HeLa cells arrested by nocodazole . It also causes misalignment of chromosomes at the anaphase plate and aneuploidy in A549 cells and slows cell cycle progression of HCT116 and COLO 205 cells irrespective of p53 activity. MPI-0479605 (30-150 mg/kg) reduces tumor volume in an HCT116 mouse colon cancer xenograft model in a dose-dependent manner.
[1] tardif k d, rogers a, cassiano j, et al. characterization of the cellular and antitumor effects of mpi-0479605, a small-molecule inhibitor of the mitotic kinase mps1. molecular cancer therapeutics, 2011, 10(12): 2267-2275.
