Figure 5. Effects of selumetnib on the expression of survivin, Stat3, and markers of cell death.
A) HCT116 cells were exposed to 15 μM 5-FU, 250 nM selumetinib, or the combination prior to irradiation with 4 Gy. Lysates were collected at 24 hours (survivin and stat3) and 48 hours (PARP and caspase-3) after irradiation. Blots are representative of at least 2 independent experiments. B) HCT116 cells were treated as above with 5-FU, selumetinib, the combination, or vehicle prior to irradiation to 4 Gy and collected at 24 hours after IR for cell cycle analysis. No significant difference was observed between the percentage of cells in G2 and M phases of the cell cycle in any group.