ABSTRACT
Objective To investigate the free radical scavenging effects and antioxidation activity of squid(Dosidicus eschrichitii Steenstrup) skin gelatin hydrolysate.Methods The free radical scavenging effects of the hydrolysate on superoxide and hydroxyl free radicals were assessed by chemiluminescence analysis method.The activity of superoxide dismutase(SOD),glutathione peroxidase(GSH-Px) and content of malondialdehyde(MDA),hydroxyprolyne(Hyp) in blood serum and skin tissue in galactose treated mice were analyzed after 42 days of hydrolysate feeding.Results and Conclusion The fraction with relative molecule weight less than 2000 D of the hydrolysate had the highest free radical scavenging effects on superoxide and hydroxyl free radicals,and the activities of SOD,GSH-Px were enhanced,the quantity of MDA in blood serum and skin tissue of the mice was decreased and the quantity of Hyp in skin tissue of mice was increased after the hydrolysate administration.