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Antioxidant properties of gallocatechin and prodelphinidins from pomegranate peel

AuthorsPlumb, G.W.; Pascual-Teresa, Sonia de ; Santos-Buelga, Celestino; Rivas-Gonzalo, Julián C.; Williamson, G.
Issue Date2002
PublisherW.S. Maney & Son
CitationRedox Report 7: 41- 46-46 (2002)
AbstractGallocatechins and a range of prodelphinidins were purified by high performance liquid chromatography from pomegranate peel. Gallocatechin, gallocatechin-(4-8)-catechin, gallocatechin-(4-8)-gallocatechin and catechin-(4-8)-gallocatechin were all identified, purified and quantified by LC-DAD-MS and MS-MS. The antioxidant properties of these compounds were assessed using two methods: (i) inhibition of ascorbate/iron-induced peroxidation of phosphatidylcholine liposomes; and (ii) scavenging of the radical cation of 2,2-azinobis (3-ethyl-benzothiazoline-6-sulphonate, ABTS) relative to the water-soluble vitamin E analogue Trolox C (expressed as Trolox C equivalent antioxidant capacity, TEAC). The prodelphinidin dimers were potent antioxidants in the aqueous phase, being much more effective than the gallocatechin monomer. However, in the lipid phase, only one of the dimers (gallocatechin-(4-8)-catechin) was significantly more effective than the monomer in the inhibition of lipid peroxidation of phosphatidylcholine vesicles. This study represents the first report on the antioxidant properties of prodelphinidins.
Identifiersdoi: 10.1179/135100002125000172
issn: 1351-0002
Appears in Collections:(IF) Artículos
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