title: Antioxidative constituents from Paeonia lactiflora.
abstract: The ethanol extract of the peony root (Paeonia Lactiflora Pall, Paeoniaceae) as well as its major active components including gallic acid and methyl gallate were evaluated for their protective effects against free radical generation and lipid peroxidation. In addition, the protective effects against hydrogen peroxide-induced oxidative DNA damage in a mammalian cell line were examined. The ethanol extracts of the peony root (PREs) and its active constituents, gallic acid and methyl gallate, exhibited a significant free radical scavenging effect against 1,1-diphenyl-2-picryl hydrazine (DPPH) radical generation and had an inhibitory effect on lipid peroxidation, as measured by the level of malondialdehyde (MDA) formation. The PREs did not have any pro-oxidant effect. They strongly inhibited the hydrogen peroxide-induced DNA damage from NIH/3T3 fibroblasts, as assessed by single cell gel electrophoresis. Furthermore, the oral administration of 50% PRE (50% ethanol extract of peony root), gallic acid and methyl gallate potently inhibited the formation of micronucleated reticulocytes (MNRET) in the mouse peripheral blood induced by a KBrO3 treatment in vivo. Therefore, PREs containing gallic acid and methyl gallate may be a useful antigenotoxic antioxidant by scavenging free radicals, inhibiting lipid peroxidation and protecting against oxidative DNA damage without exhibiting any pro-oxidant effect.
authors.affiliation: College of Pharmacy, Kangwon National University, Chuncheon 200-701, Korea
authors.forename: Seung Chul
authors.initials: SC
authors.lastname: Lee
authors.forename: Yong Soo
authors.initials: YS
authors.lastname: Kwon
authors.forename: Kyung Hun
authors.initials: KH
authors.lastname: Son
authors.forename: Hyun Pyo
authors.initials: HP
authors.lastname: Kim
authors.forename: Moon Young
authors.initials: MY
authors.lastname: Heo
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D004249:DNA Damage; D004305:Dose-Response Relationship, Drug; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology*; D005707:Gallic Acid / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000494:pharmacology*; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D041681:NIH 3T3 Cells; D018384:Oxidative Stress / Q000187:drug effects*; D029596:Paeonia / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D018517:Plant Roots; D010946:Plants, Medicinal
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers; D010936:Plant Extracts; C052082:methyl gallate; D005707:Gallic Acid