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Environ Sci Pollut Res Int. 2019 Aug 27. doi: 10.1007/s11356-019-06022-z. [Epub ahead of print]

Metal-induced nephrotoxicity to diabetic and non-diabetic Wistar rats.

Author information

1
Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Pakistan. ahsanenv38@gmail.com.
2
Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Pakistan.
3
National Centre of Excellence in Molecular Biology, University of Punjab, Lahore, Pakistan.
4
Department of Zoology, University of the Punjab, Lahore, Pakistan.

Abstract

The present study was conducted to examine the nephrotoxic effects of heavy metals including lead (Pb), manganese (Mn), arsenic (As), and cadmium (Cd) in diabetic and non-diabetic Wistar rats. Animals were exposed to heavy metals for 30 days, Pb was injected as lead acetate (C4H6O4Pb), Mn was injected as manganese chloride (MnCl2), Cd was injected as cadmium chloride (CdCl2), and As was administered orally to rats in the form of sodium arsenite (AsO2Na). Results showed that metal deposition trends in tissues were Pb > As > Cd > Mn and the urinary metal levels were Pb > Cd > As > Mn. Diabetic metal alone, as well as metal mixture-treated groups, showed decreased urinary metal levels as compared with non-diabetic metal alone and metal mixture-treated groups. Both diabetic- and non-diabetic metal mixture-treated groups revealed an increasing trend of blood urea nitrogen (BUN) and serum creatinine. In addition, heavy metal treatments resulted in elevated malondialdehyde (MDA) levels in the kidney tissue while decreased levels of catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx), and glutathione (GHS) were observed in the kidney tissue in comparison with the control group. The histological analysis of the kidney tissues showed tubular degeneration, fibrosis, and vacuolation as a result of heavy metal exposure. The present study revealed that co-exposure of heavy metals (Pb, Cd, Mn, As) induced more nephrotoxicity as compared with the metal alone treatment. Moreover, diabetic Wistar rats are more prone to kidney damage as a result of heavy metal exposure.

KEYWORDS:

Diabetes; Metal mixtures; Nephrotoxicity; Oxidative stress; Wistar rat

PMID:
31456145
DOI:
10.1007/s11356-019-06022-z

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