کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2597422 1562412 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Protective effect of quercetin on nicotine-induced prooxidant and antioxidant imbalance and DNA damage in Wistar rats
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست بهداشت، سم شناسی و جهش زایی
پیش نمایش صفحه اول مقاله
Protective effect of quercetin on nicotine-induced prooxidant and antioxidant imbalance and DNA damage in Wistar rats
چکیده انگلیسی

We have investigated the protective effect of quercetin (QN) against nicotine-induced prooxidant and antioxidant imbalance in circulation, lung, liver and kidney of experimental rats. The protective effect of QN was compared with N-acetylcysteine (NAC), a well-known antioxidant. Male albino rats of Wistar stain were used for the experimental study. Lung toxicity was induced by subcutaneous injection of nicotine at a dose of 2.5 mg/kg body weight (5 days a week, for 22 weeks) and QN was given simultaneously by intragastric intubations for 22 weeks. The body weight gain of rats during experimental period was significantly decreased in nicotine treated group, whereas QN co-treated rats significantly increased in their body weight. The levels of lipid peroxidative indices viz., thiobarbituric acid reactive substances and hydroperoxides, and nitric oxide in circulation, lung, liver and kidney of nicotine-treated rats were increased significantly when compared to normal, which were brought down to near normal in QN co-treated group. Endogenous antioxidant status viz., superoxide dismutase, catalase, glutathione peroxidase and reduced glutathione were found to be significantly decreased in circulation, lung, liver and kidney of nicotine-treated group, which were significantly increased in QN-administered groups. The extent of DNA damage (evaluated by comet assay) was significantly increased in circulatory blood of nicotine-treated rats, which was effectively brought down by QN treatment. The protective effect of QN against nicotine toxicity was comparable to that of NAC. Our data suggest that QN exerts its protective effect by modulating the extent of lipid peroxidation and augmenting antioxidant defense system and thus protects the DNA in experimental animals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Toxicology - Volume 243, Issues 1–2, 14 January 2008, Pages 207–215
نویسندگان
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