Fig. 2.

Baicalein induces dose-dependent apoptosis in DU145 and PC-3 cells. a DU145 and b PC-3 cells were treated with baicalein (0, 20, and 40 μM) for 24 h and stained with FITC-Annexin V and PI. The percentage of surviving cells is shown in the lower left quadrant; and the percentages of early-stage and late-stage apoptotic cells are shown in the lower right and upper right quadrants, respectively. c, d The apoptosis induced by baicalein was quantified. The Data are presented as the means ± SD of three independent experiments. *P < 0.05; **P < 0.01