Induction of apoptosis in human gastric cancer cells by lobaplatin treatment. MKN-28 (A), AGS (B), and MKN-45 (C) cells were exposed to various concentrations of lobaplatin (0, 1, 5 and 10 μg/mL or 0, 25, 50 and 100 μg/mL) for 24 h and their apoptosis ratios were analyzed using the Annexin V-FITC Apoptosis Detection Kit. All assays were performed in triplicate. aP < 0.05 vs control group; bP < 0.01 vs control group.