Figure 7. WBC158 induced apoptosis of MM cells and retarded cell cycle progression. U266 cells were incubated with WBC158 at the indicated concentrations for 24h. Representative images of apoptosis (A) and cell cycle (B). Statistical graphs of apoptosis (C, **P < 0.01, ***P < 0.001) and cell cycle (D, *P < 0.05, ***P < 0.001). (E) Western blot of apoptosis-related proteins.