The protective ability of Mediterranean dietary plants against the oxidative damage: The role of radical oxygen species in inflammation and the polyphenol, flavonoid and sterol contents
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- 作者：Filomena Conforti ; Silvio Sosa ; Mariangela Marrelli ; Federica Menichini ; Giancarlo A. Statti ; Dimitar Uzunov ; Aurelia Tubaro ; Francesco Menichini
- 关键词：Antioxidant activity ; Radical-scavenging activity ; Anti-inflammatory activity ; Phenolic content ; Flavonoid content ; Sterol composition
- 刊名：Food Chemistry
- 出版年：2009
- 出版时间：1 February 2009
- 年：2009
- 卷：112
- 期：3
- 页码：587-594
- 全文大小：417 K
文摘
Ten hydroalcoholic extracts of edible plants from the Calabria region (Italy) were evaluated for their in vitro antioxidant and antiradical properties and in vivo topical anti-inflammatory activity. All the extracts had radical-scavenging and/or antioxidant properties, the most active plants being hawkweed oxtongue and viper’s bugloss. The best free radical (DPPH·)-scavenging activity was found in hawkweed oxtongue and chicory leaves extracts (IC50 = 25 and 26 bc;g/ml, respectively). Hawkweed oxtongue, poppy and viper’s bugloss extracts showed the greatest inhibition of linoleic acid oxidation (IC50 = 3 bc;g/ml). Viper’s bugloss and hawkweed oxtongue extracts had the greatest antioxidant effect on bovine brain peroxidation (IC50 = 11 and 22 bc;g/ml). All the extracts also showed an anti-inflammatory effect: 300 bc;g/cm2 provoked oedema reductions ranging from 18 % to 43 % . Cress was the most active plant. Chicory leaves contained the highest amount of phenolics (190 mg/g) whilst Rush crimps contained the highest amount of flavonoids (32.9 mg/g), followed by hawkweed oxtongue (15.8 mg/g). Cress contained the highest number of sterols. Among them, γ-sitosterol (12.2 % ) and ergost-5-en-3-ol (3β) (4.5 % ) were found to be the major constituents. Moreover, three of the identified molecules (stigmasta-5,23-dien-3β-ol, stigmasta-5,24(28)-dien-3-ol (3β,22E) and 9,19-cyclolanost-24-en-3-ol (3β)) were found in this plant only.