title: Flavonoids as superoxide scavengers and antioxidants.
abstract: The superoxide anions scavenging activity and antioxidation of seven flavonoids--quercetin, rutin, morin, acacetin, hispidulin, hesperidin, and naringin--were studied. The superoxide anions were generated in a phenazin methosulphate-NADH system and were assayed by reduction of nitroblue tetrazolium. The scavenging activity ranked: rutin was the strongest, and quercetin and naringin the second, while morin and hispidulin were very weak. The concentration values yielding 50% inhibition of lipid peroxidation in mouse liver homogenate were in order of 10(-6) M for quercetin, rutin, and morin; and of 10(-5) M for acacetin and hispidulin, while naringin and hesperidin had no antioxidative action. In comparison with the antioxidative and scavenging activities of flavonoids, there are no correlations.
authors.affiliation: Department of Biology, Lanzhou University, Gansu Province, China.
authors.forename: Y T
authors.initials: YT
authors.lastname: Chen
authors.forename: R L
authors.initials: RL
authors.lastname: Zheng
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Jia
authors.forename: Y
authors.initials: Y
authors.lastname: Ju
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D005419:Flavonoids / Q000494:pharmacology*; D005609:Free Radicals; D015227:Lipid Peroxidation / Q000187:drug effects; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D051379:Mice; D013481:Superoxides / Q000378:metabolism*
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D005609:Free Radicals; D013481:Superoxides