Evodiamine-induced apoptosis of SGC7901 gastric cancer cells. Flow cytometric analysis with Annexin V-FITC/PI double staining was used to investigate apoptosis in SGC7901 cells treated with various concentrations of evodiamine (0, 3, 6, 12, 24 and 48 µmol/l). FITC, fluorescein isothiocyanate; PI, propidium iodide.