Soon afterwards, some scholars found that total triterpenoids from PVL could reduce the activities of ALT and AST in serum of rats with acute liver injury, reduce the level of MDA in liver homogenate, increase the levels of SOD and GSH-Px, and inhibit the expression of CYP2E1 in liver tissue, and its mechanism might be related to the inhibition of lipid peroxidation and CYP2E1 expression (Zhang et al., 2012). The gene discussed is CYP2E1; the disease is injury.