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Provedor de dados:  Plantas Medicinales
País:  Cuba
Título:  In vitro determination of the antioxidant capacity of extracts and phenolic compounds from Ugni molinae Turcz. leaves
Autores:  Avello Lorca,Marcia
Pastene Navarrete,Edgar
González Riquelme,Margarita
Bittner Berner,Magalis
Becerra Allende,José
Data:  2013-12-01
Ano:  2013
Palavras-chave:  Antioxidant capacity
Lipid peroxidation
Ugni molinae.
Resumo:  Introduction: Ugni molinae Turcz., (Myrtaceae) is a plant that is distributed in central-southern of Chile, including Juan Fernández Islands. The leaves have been used in folk medicine for diarrhea and oral infections due to their astringent and antiseptic properties. Objective: antioxidant activity of two extracts (ethyl acetate and methanol) from U. molinae leaves was assessed in several assays. Methods: HPLC (high performance liquid chromatography) for chemical analysis and in vitro antioxidant methods. Results: HPLC profiling of both extracts showed the presence of flavan-3-ols (catechin) and gallic acid, flavonoids and caffeic acid derivates as main constituents. These extracts showed significant activity on 2,2-diphenyl-1-picrylhydrazyl (DPPH), cupric ion reducing antioxidant capacity (CUPRAC) and hydroxyl radical assays. It is noteworthy that bleaching of b-carotene-linoleate liposomes and copper-induced oxidation of human LDL were prevented by both extracts. Conclusions: results suggest that polyphenol-rich extracts of U. molinae could slow down lipid peroxidation and limit free radical damage.
Tipo:  Journal article
Idioma:  Inglês
Editor:  ECIMED
Formato:  text/html
Fonte:  Revista Cubana de Plantas Medicinales v.18 n.4 2013

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