Resumo

SALEH, Eman M. Antioxidant effect of aqueous extract of propolis on hepatotoxicity induced by octylphenol in male rats. Acta toxicol. argent. [online]. 2012, vol.20, n.2, pp.68-81. ISSN 1851-3743.

4-tertiary-octylphenol (4-tert-OP) is an alkylphenol that affects human health by stimulating free radical production. Aqueous propolis extract is a natural product rich in favonoids that have antioxidant activity. This study was designed to investigate the ability of aqueous propolis extract to reduce the hepatotoxicity induced by 4-tert-OP in male rats. Animals were assigned to 5 groups and treated for 6 weeks. Group 1: control; group 2: 100 mg 4-tert-OP/kg b.wt./day; group 3: 100 mg aqueous propolis extract /kg b.wt./day; group 4: 100mg 4-tert-OP/kg b.wt./day plus 100 mg aqueous propolis extract /kg b.wt./day; group 5: 100 mg 4-tert-OP/kg b.wt./day for 6 weeks followed by 100 mg aqueous propolis extract /kg b.wt./day for 6 weeks. Group 4-tert-OP signifcantly elevated AST, ALT, ALP, GGT, bilirubin, creatinine, urea, total lipids, total cholesterol, triglycerides, LDL-C and MDA with a signifcant decrease in total proteins, albumin, globulin, HDL-C, total antioxidant capacity, SOD, CAT and GST compared to control group. Administration of aqueous propolis extract either alone or combined with 4-tert-OP ameliorated the hepatotoxicity induced by 4-tert-OP. DNA fragmentation supported the deleterious effect of 4-tert-OP and the ameliorative effect of propolis on liver cellular proteins and enzymes. Histopathological fndings revealed the hepatotoxicity induced by 4-tert-OP and the protective effect of aqueous propolis extract. In conclusion, aqueous propolis extract could reduce the damage and toxicity effects on liver cells induced by 4-tert-OP.

Palavras-chave : 4-tertiary-octylphenol (4-tert-OP); Aqueous propolis extract; Hepatotoxicity; Antioxidant enzymes.

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