AZD1152-HQPA (Barasertib)

1205Lu cells were treated for 48hours with the indicated concentrations of  AZD1152-HQPA. 

p53 phosphorylation by Aurora B. A, p53 reporter construct was co-transfected with the indicated plasmids into H1299 cells and reporter activation was determined as described under “Experimental Procedures.” B, U2OS cells and H1299 cells were treated with AZD1152 (AZD) for 12 h at the indicated doses. Cell lysates were harvested and immunoblotted with Bax and actin antibodies. C, U2OS cells were treated with 100 ng/ml nocodazole (noc) overnight, and then shake off cells were harvested, washed with PBS, and reseeded. Approximately 2 h later, cells were either lysated or treated with dimethyl sulfoxide (DMSO) or AZD1152 for another 16 h before harvesting. Cell lysates were immunoblotted with Bax, phospho-H3, and actin antibodies. D, GST-p53 or GST control proteins were incubated with Aurora B protein and analyzed for phosphate incorporation (left panel). Coomassie staining of GSTp53 and GST protein is also shown (right panel). E, In vitro phosphorylation sites of GST-p53 identified by mass spectrometry analysis. F, GST-p53 wild-type and 3A mutant proteins were analyzed in a kinase assay as in B. G, plasmids encoding wild-type or 3A mutant (CMV)-FLAG-p53 were transiently transfected into H1299 cells, with or without Myc-Aurora B (AurB) expression vector. 20 h post-transfection, cells were lysed and subjected to immunoprecipitation (IP) with p53 antibody (fl-393). Precipitates were immunoblotted with antibodies to p53 (DO-1), Thr(P) and Ser(P), as indicated. Vec, vector.