SOD1 and acute respiratory distress syndrome: In addition, SOD and GSH‐Px are important radical superoxide scavengers, which protect the cell from oxidative damage.40 The result was confirmed that PAF pre‐treatment significantly reduced the ROS levels and MDA content, as well as increased the activity of SOD and GSH‐Px in LPS‐stimulated ALI mice (Figure 5A,C).