title: Antioxidant activity and phenolic and mineral content of rose grape juice.
abstract: There are many studies related to the antioxidant activity of grape products; however, they concern only purple and white grape varieties. Up to now, there are no reports of studies on the Goethe rose grape variety, either on its antioxidant activity or on its phenolic and mineral quantification. Thus, the purpose of this study was to evaluate in vitro and in vivo antioxidant activity, as well as to quantify total phenolic compounds, ascorbic acid, and mineral content, in a Goethe rose grape juice. The results obtained showed that the Goethe rose grape juice is a great polyphenol source, which contains catechin, epicatechin, and procyanidins (B(1), B(2), B(3), and B(4)). Of all metals analyzed, potassium, calcium, magnesium, and iron showed the highest values. We found that this rose grape juice shows an important antioxidant activity in in vitro (2,2-diphenyl-1-picrylhydrazyl radical scavenging activity) and in vivo (using the Saccharomyces cerevisiae yeast cells) assays. The antioxidant activity could be explained by the significant phenolic content and ascorbic acid levels found in the juice. The results showed that rose grape juice is an excellent antioxidant source, which could contribute to the prevention of many diseases related to oxidative stress, such as atherosclerosis and Parkinson's disease.
authors.affiliation: Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Brazil. carolinedani@yahoo.com.br
authors.forename: Caroline
authors.initials: C
authors.lastname: Dani
authors.forename: Lívia S
authors.initials: LS
authors.lastname: Oliboni
authors.forename: Regina
authors.initials: R
authors.lastname: Vanderlinde
authors.forename: Daniel
authors.initials: D
authors.lastname: Pra
authors.forename: Johnny F
authors.initials: JF
authors.lastname: Dias
authors.forename: Maria Lucia
authors.initials: ML
authors.lastname: Yoneama
authors.forename: Diego
authors.initials: D
authors.lastname: Bonatto
authors.forename: Mirian
authors.initials: M
authors.lastname: Salvador
authors.forename: João A P
authors.initials: JA
authors.lastname: Henriques
mesh_terms: D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D001205:Ascorbic Acid; D001628:Beverages; D002392:Catechin / Q000032:analysis; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology*; D006861:Hydrogen Peroxide / Q000009:adverse effects; D008903:Minerals / Q000032:analysis*; D010636:Phenols / Q000032:analysis*; D028321:Plant Preparations / Q000737:chemistry / Q000494:pharmacology*; D044945:Proanthocyanidins / Q000032:analysis; D012441:Saccharomyces cerevisiae; D027843:Vitis / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers; D008903:Minerals; D010636:Phenols; D028321:Plant Preparations; D044945:Proanthocyanidins; D002392:Catechin; D006861:Hydrogen Peroxide; D001205:Ascorbic Acid