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Cadmium induced lipid peroxidation in kidney function

U K Sentürk1, G Oner, V M Izgüt-Uysal

  • 1Akdeniz University, Faculty of Medicine, Department of Physiology, Antalya, Turkey.

Journal of Basic and Clinical Physiology and Pharmacology
|July 1, 1994
PubMed
Summary

Cadmium accumulation in rat kidneys increases lipid peroxidation and impairs kidney function. Antioxidant treatments did not fully protect against cadmium-induced nephrotoxicity, suggesting other mechanisms are involved.

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Area of Science:

  • Environmental Toxicology
  • Renal Physiology

Background:

  • The kidney is a primary target organ for toxic metals like cadmium.
  • Cadmium accumulation can lead to the generation of lipid peroxidation products, potentially contributing to nephrotoxicity.

Purpose of the Study:

  • To investigate the role of lipid peroxidation in cadmium-induced nephrotoxicity in rats.
  • To assess the effect of cadmium exposure on kidney function and thiobarbituric acid reactive substances (TBARS) levels.

Main Methods:

  • Rats were exposed to an aqueous cadmium solution (15 µg/ml) for 30 days.
  • Kidney function (Glomerular Filtration Rate - GFR) and TBARS levels were measured.
  • The impact of co-administering selenium and vitamins A, C, and E was evaluated.

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Main Results:

  • Cadmium accumulation in the kidney cortex significantly increased the Cd/Zn ratio and elevated TBARS levels in both cortex and medulla.
  • Cadmium exposure led to a significant increase in renal cortex TBARS and a marked decrease in GFR.
  • Antioxidant co-administration (selenium, vitamins A, C, E) reduced TBARS but did not reverse the adverse effects on kidney function.

Conclusions:

  • Lipid peroxidation, assessed by TBARS, is associated with cadmium-induced nephrotoxicity in rats.
  • The inability of antioxidants to fully reverse kidney dysfunction suggests that lipid peroxidation is not the sole mechanism of cadmium toxicity.