Figure 4.

Caspase-8 activity in HepG-2 liver cancer and MDA-MB-231 breast cancer cells following treatment with Strobilanthes crispa stem hexane extract for 72 h. The cancer cells were treated with the extract at their respective half maximal inhibitory concentrations extract (38.8 µg/ml for HepG-2 cells; 42.5 µg/ml for MDA-MB-231 cells), and the fluorescent expression of caspase-8 was measured. Data are presented as the mean ± standard deviation following 3 independent experiments. **P<0.01, compared with the untreated control.