HMOX1 and pancreatitis: Not surprisingly, immunohistochemical staining and Western blot results indicated that the hepatic expression levels of antioxidant proteins heme oxygenase-1 (HO-1) and NADPH quinone oxidoreductase 1 (NQO-1) were slightly upregulated in sodium taurocholate-induced SAP rats, which may represent a stress protection for the liver to defend against pancreatitis-induced liver injury.