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Article history: Received April 16, 2020 Accepted March 25, 2020 Available online February 22, 2021 The current study was conducted to investigate the role of alpha lipoic acid (ALA) against testicular toxicityinduced by lead acetate (PbAc) in rats. Four groups of adult Wistar albino rats (8 for each) were intubated daily for 56 days as follows; control (C)received dislled water; lead acetate at dose of 5mg/kg b.w (T1); ALA at dose of 60mg/kg b.w (T2) and and group T3 received both of PbAc + ALA at the same doses of above. Blood samples were collected at 0, 28 and 56 day of the experiment, then the sera were collected for determination of testosterone (T) and follicular stimulating hormone (FSH). At the end of the experiment, body weight, testes weight and epididymal sperm parameters was studied. Furthermore, histo-morphometric and histopathological study changes were examined. The results revealed a significant decrease in testes weight to body weight ratio, serum testosterone, sperm concentration and motility, diameters of seminiferous tubules, height of seminiferous epithelia and number of Leydig cells, moreover the results showed a significant increase in serum FSH, dead sperm and abnormal sperm morphology in group T1 when compared with the other groups. Comparing to lead acetate treated rats, group T3 showed an improvement at the level of the studied parameters, accompanied with mild congestion in the interstitial tissue with a marked developing proliferation of spermatogenic cells, as well as presence of mature spermatozoa in the seminiferous tubules. In conclusion, subchronic exposure of rats to lead acetate showed an amelioration of all reproductive parameters near to normal values due to the antioxidant effects of ALA and the histological changes of the testes confirmed such change in serum parameters and the beneficial role of ALA.

Role of alpha lipoic acid in protecting testes of adult rats from lead toxicity