title: Antioxidant activity of wine pigments derived from anthocyanins: hydrogen transfer reactions to the dpph radical and inhibition of the heme-induced peroxidation of linoleic acid.
abstract: The consumption of red wine can provide substantial concentrations of antioxidant polyphenols, in particular grape anthocyanins (e.g., malvidin-3-O-beta-d-glucoside (1)) and specific red wine pigments formed by reaction between anthocyanins and other wine components such as catechin (3), ethanol, and hydroxycinnamic acids. In this work, the antioxidant properties of red wine pigments (RWPs) are evaluated by the DPPH assay and by inhibition of the heme-induced peroxidation of linoleic acid in acidic conditions (a model of antioxidant action in the gastric compartment). RWPs having a 1 and 3 moieties linked via a CH(3)-CH bridge appear more potent than the pigment with a direct 1-3 linkage. Pyranoanthocyanins derived from 1 reduce more DPPH radicals than 1 irrespective of the substitution of their additional aromatic ring. Pyranoanthocyanins are also efficient inhibitors of the heme-induced lipid peroxidation, although the highly hydrophilic pigment derived from pyruvic acid appears less active.
authors: UMR408 Sécurité et Qualité des Produits d'Origine Végétale, INRA, Site Agroparc, Domaine St-Paul, F-84914 Avignon, France.
authors: Pascale
authors: P
authors: Goupy
authors: Ana-Belen
authors: AB
authors: Bautista-Ortin
authors: Helene
authors: H
authors: Fulcrand
authors: Olivier
authors: O
authors: Dangles
mesh_terms: D000872:Anthocyanins / Q000737:chemistry / Q000494:pharmacology*; D000975:Antioxidants / Q000494:pharmacology*; D001713:Biphenyl Compounds / Q000737:chemistry*; D006418:Heme / Q000494:pharmacology; D006859:Hydrogen / Q000737:chemistry; D019787:Linoleic Acid / Q000737:chemistry; D015227:Lipid Peroxidation / Q000187:drug effects*; D010851:Picrates / Q000737:chemistry*; D014920:Wine / Q000032:analysis*
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D001713:Biphenyl Compounds; D010851:Picrates; D006418:Heme; D006859:Hydrogen; D019787:Linoleic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl