title: Comparative studies of the antioxidant effects of a naturally occurring resveratrol analogue -- trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene and resveratrol -- against oxidation and nitration of biomolecules in blood platelets.
abstract: The action of two phenolic compounds isolated from the bark of Yucca schidigera: trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene and its analogue -- resveratrol (trans-3,4',5-trihydroxystilbene, present also in grapes and wine) on oxidative/nitrative stress induced by peroxynitrite (ONOO(-), which is strong physiological oxidant and inflammatory mediator) in human blood platelets was compared. The trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene, like resveratrol, significantly inhibited protein carbonylation and nitration (measured by enzyme-linked immunosorbent assay method) in the blood platelets treated with peroxynitrite (0.1 mM) and markedly reduced an oxidation of thiol groups of proteins (estimated with 5,5'-dithio-bis(2-nitro-benzoic acid)] or glutathione (measured by high performance liquid chromatography method) in these cells. The trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene, like resveratrol, also caused a distinct reduction of platelet lipid peroxidation induced by peroxynitrite. The obtained results indicate that in vitro trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene and resveratrol have very similar protective effects against peroxynitrite-induced oxidative/nitrative damage to the human platelet proteins and lipids. Moreover, trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene proved to be even more potent than resveratrol in antioxidative tests. We conclude that the novel tested phenolic compound -- trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene isolated from Y. schidigera bark possessing Generally Recognized As Safe label given by the Food and Drug Administration and allows their human dietary use -- seems to be a promising candidate for future evaluations of its antioxidative activity and may be a good candidate for scavenging peroxynitrite.
authors.affiliation: Department of General Biochemistry, Institute of Biochemistry, University of Lodz, Lodz, Poland. olasb@biol.uni.lodz.pl
authors.forename: Beata
authors.initials: B
authors.lastname: Olas
authors.forename: Barbara
authors.initials: B
authors.lastname: Wachowicz
authors.forename: Pawel
authors.initials: P
authors.lastname: Nowak
authors.forename: Anna
authors.initials: A
authors.lastname: Stochmal
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Oleszek
authors.forename: Rafal
authors.initials: R
authors.lastname: Glowacki
authors.forename: Edward
authors.initials: E
authors.lastname: Bald
mesh_terms: D000328:Adult; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D001792:Blood Platelets / Q000187:drug effects* / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D004797:Enzyme-Linked Immunosorbent Assay; D005978:Glutathione / Q000378:metabolism; D006801:Humans; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects*; D030421:Peroxynitrous Acid / Q000378:metabolism*; D024301:Plant Bark; D050050:Protein Carbonylation / Q000187:drug effects; D000077185:Resveratrol; D013267:Stilbenes / Q000302:isolation & purification / Q000494:pharmacology*; D013438:Sulfhydryl Compounds / Q000378:metabolism; D027623:Yucca / Q000737:chemistry
chemical_list: D000975:Antioxidants; D013267:Stilbenes; D013438:Sulfhydryl Compounds; C531210:trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene; D030421:Peroxynitrous Acid; D005978:Glutathione; D000077185:Resveratrol