Fig. 4

Effects of CAM pretreatment on CAT activity in H₂O₂-stimulated SAECs. CAT activities were measured using a catalase assay kit as described in the Methods. Samples were obtained from supernatants of control cells, of cells stimulated with 100 μM H₂O₂ alone, or of cells pretreated with 1, 5 or 10 μM CAM for 72 h before stimulation with 100 μM H₂O₂ for 1.5 h. Data are presented as means ± SD of three to six independent experiments. ^*p < 0.05, ^**p < 0.01 vs. control cells, ^##p < 0.01 vs. cells stimulated with H₂O₂ alone, ^††p < 0.01 vs. cells pretreated with 10 μM CAM