[Oxygen free radical scavening activity and anti-lipid peroxidation of tea polyphenol]

The oxygen free radical scavenging activity and anti-lipid peroxidation of tea polyshenol were studied in vitro. Tea polyphenol possessed significantly scavening effect on hydorxyl radical produced by Fenton recation and superoxide anion produced by xanthine-xanthine oxidase system (IC50 were 919.6 mg/L and 836 mg/L espectively). Tea polyphenol could significantly inhibit the lipid peroxidation of brain omogenate and cerbral mitochondrial membrane induced by hyderxyl radical. The results suggest that the anti-lipid peroxidation of tea polyphenol may be related to its scavenging effects on oxygen free radicals.