title: Anti-oxidant activity of dibenzocyclooctene lignans isolated from Schisandraceae.
abstract: The anti-oxidant activity of nine dibenzocyclooctene lignans isolated from Schisandra chinensis, S. rubriflora, and Kadsura longipedunculata, respectively, was studied. Seven of the 9 lignans (1 mM) inhibited iron/cysteine-induced lipid peroxidation (malondialdehyde, MDA, formation) of rat liver microsomes as well as superoxide anion production in the xanthine/xanthine oxidase system. The actions of the 7 lignans were much more potent than vitamin E at the same concentration of 1 mM. Among the lignans, schisanhenol was the most active one. This compound also prevented the decrease of membrane fluidity of liver microsomes induced by iron/cysteine. The results indicated that seven of the lignans such as schisanhenol have anti-oxidant activities.
authors.affiliation: Department of Pharmacology, Chinese Academy of Medical Sciences, Beijing.
authors.forename: H
authors.initials: H
authors.lastname: Lu
authors.forename: G T
authors.initials: GT
authors.lastname: Liu
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D034242:Cyclooctanes; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D006801:Humans; D017705:Lignans; D008031:Lignin / Q000494:pharmacology*; D015227:Lipid Peroxidation; D008297:Male; D008862:Microsomes, Liver / Q000187:drug effects; D011083:Polycyclic Compounds / Q000737:chemistry / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000975:Antioxidants; D034242:Cyclooctanes; D004365:Drugs, Chinese Herbal; D017705:Lignans; D011083:Polycyclic Compounds; C045309:schisanhenol; D008031:Lignin