Abstract
The juice of R. fruticosus (RFJ) fruits grown in Sicily was analysed for polyphenol compounds and tested to evaluate in vitro antioxidant and in vivo antiinflammatory and gastroprotective effects. RFJ, containing mainly anthocyanins, such as cyanidin derivatives, significant amounts of phenolic acids, and smaller amounts of flavonoids, showed significant antioxidant activity in DPPH (2,2-diphenyl-1-picrylhydrazyl radical) (4,147.194±17.199mg trolox equivalent [TE]/100ml), TE antioxidant capacity (8,312.444±43.055mg TE/100ml), ferric reducing antioxidant power (2,177.830±21.015mg TE/100ml), oxygen radical absorbance capacity (95,377.674±616.194μmol TE/100ml juice), and β-carotene bleaching (72%±4.58) assay. In vivo studies showed that RFJ inhibit significantly the carrageenan-induced paw oedema (63-71%) in rats and possess antiinflammatory effects particularly significant in association with phenylbutazone (94-96%). In addition, RFJ pretreatment was able to prevent the ethanol-induced ulcerogenic effect in rats. All in vivo results were corroborated by histopathological observations and are in good agreement with antioxidant activity, confirming the relationships between biological effects observed and radical scavenging properties of RFJ.
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