Activities of caspase-8 (A), caspase-9 (B), and caspase-3 (C) in the MCF-7 cells after treatment with 25 µg.mL-1 artesunate at the different incubation times. Each value is the mean ± SD of the three experiments. * Indicates a significant difference between the untreated and artesunate-treated cells, p<0.05.