title: Tronchuda cabbage (Brassica oleracea L. var. costata DC): scavenger of reactive nitrogen species.
abstract: The ability of tronchuda cabbage ( Brassica oleracea L. var. costata DC) to act as a scavenger of the reactive nitrogen species nitric oxide and peroxynitrite was investigated. The aqueous extracts obtained from tronchuda cabbage seeds and from its external and internal leaves exhibited a concentration dependent scavenging capacity. The antioxidant potential observed against the two reactive species was as follows: seeds > external leaves > internal leaves. In order to establish a possible correlation with the chemical composition of the extracts, the activity of ascorbic and sinapic acids and kaempferol 3- O-rutinoside was also studied. Among the compounds tested, sinapic acid showed the strongest antioxidant activity against both species.
authors.affiliation: REQUIMTE/Servico de Farmacognosia, Faculdade de Farmacia, Universidade do Porto, R. Anibal Cunha Porto, Portugal.
authors.forename: Carla
authors.initials: C
authors.lastname: Sousa
authors.forename: Patrícia
authors.initials: P
authors.lastname: Valentão
authors.forename: Federico
authors.initials: F
authors.lastname: Ferreres
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Seabra
authors.forename: Paula B
authors.initials: PB
authors.lastname: Andrade
mesh_terms: D001937:Brassica / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D003373:Coumaric Acids / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000494:pharmacology*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D026361:Reactive Nitrogen Species / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry
chemical_list: D003373:Coumaric Acids; D016166:Free Radical Scavengers; D010936:Plant Extracts; D026361:Reactive Nitrogen Species; C073734:sinapinic acid