Urolithiasis

, Volume 42, Issue 2, pp 97–103 | Cite as

Antioxidants inhibition of high plasma androgenic markers in the pathogenesis of ethylene glycol (EG)-induced nephrolithiasis in Wistar rats

  • Mohammad Reza Naghii
  • Mahmood Mofid
  • Mehdi Hedayati
  • Kazem Khalagi
Original Paper

Abstract

The association between serum gonadal steroids and urolithiasis in males received only limited attention. Calcium oxalate urolithiasis is induced by administration of ethylene glycol in drinking water. It appears that the administration of natural antioxidants has been used to protect against nephrolithiasis in human and experimental animals. The purpose is to study the potential role of antioxidants as inhibitors of high plasma androgenic markers or hyperandrogenicity in the pathogenesis of ethylene glycol-induced nephrolithiasis in Wistar rats. Male Wistar rats were studied in 4-week period. Group 1 (control) was fed a standard commercial diet. Group 2 received the same diet with 0.5 % of ethylene glycol. Group 3 received EG plus the diet and water added with antioxidant nutrients and lime juice as the dietary source of citrate. Group 4 and Group 5 were treated similar to Group 2 and Group 3 with 0.75 % of ethylene glycol. For antioxidant supplementation, the standard diet enriched with 4,000.0 μg vitamin E and 1,500.0 IU vitamin A for each rat per day added to the diet once a week, and provided daily with 5.0 mg vitamin C, 400.0 μg vitamin B6, 20.0 μg selenium, 12.0 mg zinc, and 2.0 mg boron for each rat per day in their drinking water. After treatment period, collection of blood was performed and kidneys were removed and used for histopathological examination. The results based on various assays, measuring size of crystal deposition, and histological examinations showed that high concentration of androgens acts as promoter for the formation of renal calculi due to ethylene glycol consumption and the inhibitory role of antioxidant complex in the formation of renal calculi disease. Data revealed that the size and the mean number of crystal deposits determined in EG 0.75 % treated groups (G4) were significantly higher than the EG-treated groups, added with antioxidant nutrients and lime juice (G5). The mean concentration of androgens in Group 4 increased after EG 0.75 % administration, and decreased after antioxidants supplementation in Group 5. Elevated concentration of androgens (as promoters of the formation of renal calculi) as a result of EG consumption and their decreasing following antioxidant supplementations along with the slight decrease in malondialdehyde level provides a scientific rational for preventive and treatment roles of antioxidant nutrient complex in kidney stone disease.

Keywords

Ethylene glycol Calcium oxalate urolithiasis Antioxidants Androgens Wistar rats 

Notes

Conflict of interest

There is no conflict of interest.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Mohammad Reza Naghii
    • 1
  • Mahmood Mofid
    • 2
  • Mehdi Hedayati
    • 3
  • Kazem Khalagi
    • 4
  1. 1.Department of Nutrition, Health School and Sport Physiology Research CenterBaqiyatallah (a.s.) University of Medical SciencesTehranIslamic Republic of Iran
  2. 2.Department of Anatomy, Faculty of MedicineBaqiyatallah (a.s.) University of Medical SciencesTehranIslamic Republic of Iran
  3. 3.Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine SciencesShahid Beheshti University of Medical SciencesTehranIslamic Republic of Iran
  4. 4.Department of Epidemiology and Statistics, Health SchoolBaqiyatallah (a.s.) University of Medical SciencesTehranIslamic Republic of Iran

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