Lead is one of the oldest environmental and occupational toxins. Health hazards from increased lead exposure as a result of industrial and environmental pollution are recognized. The aim of the present study was to investigate the protective effects of quercetin as a model of an antioxidant drug against the toxic effects of lead acetate on the blood and the testis of rats. The lead concentrations were determined in blood and the testis. Testosterone (T), luteinizing hormone (LH) and follicle stimulating hormone (FSH) were assessed in serum. Hemoglobin (Hb) content, packed cell volume (PCV), white blood cell (WBC) and red blood cell (RBC) counts were evaluated in the whole blood. Our results showed that administration of lead acetate was associated with an increased lead levels in blood as well as in the testis. Lead acetate administration also caused a decrease in testicular function, Hb content, PCV and RBC count in comparison to the respective mean values of the control. In addition, lead acetate increased WBC count and induced alterations in sperm count, sperm motility and sperm abnormality and histopathology. In the contrary, administration of lead acetate along with quercetin partially restored the studied parameters to normal values. In conclusion, the treatment with quercetin may provide a partial protection against the toxic effects induced by lead acetate in blood and the testis of rats.
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