[In vitro studies on antioxidant and antimicrobial activities of polysaccharide from Lycoris aurea].
OBJECTIVE: To study the preliminary antioxidant and antimicrobial activities of polysaccharide extracted from Lycoris aurea. METHODS: The scavenging activities of the polysaccharide in vitro on superoxide radical (O2-*), hydroxyl radical (*OH), alkyl radical (R*) and hydrogen peroxide (H2O2) were investigated by modified chemical systems. Meanwhile, the antimicrobial activities were tested using paper-discagar diffusion method. RESULTS: In general, the antioxidant activities of the polysaccharide were lower compared with Vc. However, the scavenging effects to *OH and H2O2 were parallel to Vc. Meanwhile, polysaccharide from Lycoris aurea had strong antimicrobial activities against Micrococcus luteus, Bacillus pumilus and Staphylococcus aureus. CONCLUSION: The polysaccharide extracted from L. aurea can scavenge *OH and H2O2 effectively and inhibit Gram-positive bacterias.
Ru, Q-M; Pei, Z-M; Zheng, H-L
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