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In this study we have shown that Quercus infectoria attenuates Fe- NTA induced renal oxidative stress, hyperproliferative response and renal carcinogenesis in rats. Fe-NTA promoted DEN (N-diethyl nitrosamine) initiated renal carcinogenesis by increasing the percentage incidence of tumors and induces early tumor markers viz. ornithine decarboxylase (ODC) level and PCNA expression. Fe- NTA (9 mg Fe/kg body weight, intraperitoneally) enhances renal Malondialdehyde, xanthine oxidase and hydrogen peroxide generation with reduction in renal glutathione content, antioxidant enzymes, viz., glutathione peroxidase, glutathione reductase, catalase, glucose-6-phosphate dehydrogenase and phase-II metabolizing enzymes such as glutathione-S-transferase and quinone reductase. It also enhances blood urea nitrogen and serum creatinine. Fe-NTA also lead to increase in levels of some inflammatory markers viz NO and MPO and some proinflammatory cytokines viz PGE-2 and TNF-1. The chemopreventive efficacy of Quercus infectoria was studied in terms of xenobiotic metabolizing enzyme activities, LPO, redox status, serum toxicity markers, inflammatory and proinflammatory markers and cell proliferation in the kidney tissue. Oral administration of Quercus infectoria at doses of 75 and 150 mg/kg b wt effectively suppressed renal oxidative stress, inflammation and tumor incidence. Chemopreventive effects of Quercus infectoria were associated with up-regulation of xenobiotic metabolizing enzyme activities and down regulation of serum toxicity markers. Present study supports Quercus infectoria as a potent chemopreventive agent and suppresses Fe-NTA-induced renal carcinogenesis and oxidative and inflammatory response in Wistar rat.
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Author(s): Muneeb U Rehman Mir Tahir Farrah Ali Wajhul Qamar Rehan Khan Abdul QuaiyoomKhan Abdul Lateef OdayOHamiza and Sarwat Sultana
Chemoprevention, Carcinogenesis, Nephrotoxicity, PCNA and Inflammation