MK8745

MK-8745 leads to cell cycle arrest at the G2/M phase with accumulation of tetraploid nuclei followed by cell death in non-Hodgkin lymphoma (NHL) cell lines. Treatment with MK-8745 induces p21(waf1/cip1) and CycB1, indicating cell cycle arrest and an increase in the G2/M phase cell population. Following MK-8745 treatment, Aurora-A substrates (TACC3, Eg5 and TPX2) are rapidly degraded following the reduction of phospho-Aurora-A. ^[1] MK8745 induces apoptotic cell death in a p53-dependent manner when tested in vitro in cell lines of multiple lineages. Exposure of p53 wild-type cells to MK8745 results in the induction of p53 phosphorylation (ser15) and an increase in p53 protein expression. p53-dependent apoptosis by MK8745 is further confirmed in HCT 116 p53(-/-) cells transfected with wild-type p53. ^[2]