Fig. 6

Effect of catalpol on caspase-9 expression in human induced pluripotent stem cells with aconitine-induced cardiac arrhythmia. Catalpol treatment decreased the percentage of caspase-9-positive cells by 7.9, 34.3, and 67.8% at concentrations of 1, 10, and 100 µM, respectively. a Immunofluorescent images of caspase-9-positive cells. b Percentage analysis of caspase-9-positive cells. ***P < 0.001 vs. Group I; ^#P < 0.05 and ^###P < 0.001 vs. Group II. Scale bar is 50 µm