The antioxidant action and mechanism of selenizing schisandra chinensis polysaccharide (sSCP) were investigated in chicken embryo hepatocyte (CEH) taking schisandra chinensis polysaccharide (SCP) and N-acetyl-L-cysteine (NAC) as control. The CEH was cultured and treated with sSCP, then exposed to HO. The CEHs' viability, apoptosis, ROS and antioxidase contents and the protein expression in MAPKs pathway and mitochondrion-dependence apoptotic signal pathway were assayed. The results showed that sSCP could significantly raise the cell viability and the activities of SOD, CAT and GSH-Px, decrease the cell apoptosis and the content of LDH, AST, ALT and MDA, down-regulate the protein expression of p-JNK, p-ERK, p-p38, Bax, Caspase 3 and cytochrome C, and up-regulate the protein expression of Bcl-2 in comparison with HO control group. The action of sSCP were stronger than those of SCP and NAC. These results indicated that selenylation modification could significantly enhance the antioxidant activity of SCP, sSCP could significantly protect hepatocyte from oxidative damage induced by HO, and its mechanism was by regulating the protein expression in MAPKs and mitochondrion-dependence apoptotic signaling pathways.
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