Figure 5. LPS-induced damage is mediated by ROS. (A) Co-culture of HUVECs and macrophages (MΦ) were incubated with 100 ng/mL LPS in the presence or absence of catalase and/or SOD. Red: HUVECs, blue: cell nuclei. Dotted lines indicate areas without endothelial cells. (B) Quantification of damaged endothelial area (%). *p < 0.05; **p < 0.01.