Figure 2. Low concentration dinaciclib induced apoptosis in human iPS cells is p53 dependent.
(a) iPS cells cultured on laminin E8 fragment were treated with doxorubicin (1 μM), DMSO or different concentrations of dinaciclib for 6 hrs. Whole cell lysates were then used for Western Blot analysis to measure ɣ-H2AX levels. ß-ACTIN was used as a loading control. (b) Whole cell lysates from iPS cells treated with DMSO or 6 nM dinaciclib for 6 hrs were used to examine protein levels of p53. (c) Total mRNA was extracted from iPS cells transduced with control (CTRL) or p53-specific shRNAs (KD) and was used to measure levels of knockdown using qRT-PCR. (d) Representative phase-contrast images of p53 WT and KD iPS cells treated with 6 nM dinaciclib for 24 hrs. Scale bar = 100 μm. (e) Western blot analysis of MCL-1 in iPS cells treated with DMSO or 6 nM dinaciclib for 6 hrs. (f) Western Blot of MCL-1 in p53 WT and KD iPS cells treated with DMSO or 6 nM dinaciclib for 6 hrs.
