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The article aimed to investigate the effect of the antioxidant quercetin (QCT) on male Wistar albino rats under oxidative stress caused by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), focusing on their reproductive system, in order to find a way to combat declining male productivity. Thirty adult male Wistar rats of body weight ranged from 230 to 250 g were randomly divided into five equal groups (6 per group), designated as normal control (corn oil) and treatments: 10 μg/kg TCDD; 20 mg/kg QCT; 20 mg/kg QCT + 10 μg/kg TCDD (pretreatment of QCT); 10 μg/kg TCDD + 20 mg/kg QCT (posttreatment of QCT), and the treatments were administered intragastrically by gavage for twelve weeks and the study was conducted in Salahaddin University-Erbil, Iraq. In each group, three males were mated with untreated fertile females, and the reproductive and biochemical parameters were evaluated for each group. TCDD significantly reduced the values of sperm quality (motility, viability, and count), serum testosterone, sex ratio, body weight, gonads weight, and testicular antioxidant enzymes (superoxide dismutase, catalase, and glutathione reductase). However, increased sperm abnormality and oxidant biomarker (malondialdehyde) were observed. Concomitant treatment with QCT ameliorated these affected values, especially when QCT treatment was administered 30 min before TCDD dosing.

applied ecology and environmental research

QUERCETIN REDUCES OXIDATIVE STRESS DAMAGE TO REPRODUCTIVE PROFILE INDUCED BY 2,3,7,8TETRACHLORODIBENZO-P-DIOXIN IN MALE ALBINO RATS (RATTUS NORVEGICUS L.)