Figure 6.

Effect of APS on H₂O₂-induced ROS formation in human umbilical vein endothelial cells. Representative images from the (A) control, (B) 400 µM H₂O₂ only and (C) 1 µg/ml APS + 400 µM H₂O₂ groups. Magnification, ×400. (D) Quantification of the effect of APS on the ROS formation induced by 400 µM H₂O₂, expressed as a percentage of the control group. Data are expressed as the mean ± standard deviation. ^##P<0.01 vs. control; **P<0.01 vs. H₂O₂ only. APS, Astragalus polysaccharide; ROS, reactive oxygen species.