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Related Experiment Videos

Peroxidative changes in experimental diabetes mellitus.

J S Kumar1, V P Menon

  • 1Department of Biochemistry, University of Kerala, Thiruvananthapuram.

The Indian Journal of Medical Research
|June 1, 1992
PubMed
Summary

Experimental diabetes in rats showed increased lipid peroxidation in the liver and kidney, but not the heart. Antioxidant enzyme levels also changed, indicating tissue-specific responses to diabetes-induced oxidative stress.

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Area of Science:

  • Biochemistry
  • Physiology
  • Endocrinology

Background:

  • Diabetes mellitus is a metabolic disorder associated with increased oxidative stress.
  • Lipid peroxidation is a marker of oxidative damage and is implicated in diabetes complications.

Purpose of the Study:

  • To investigate the impact of experimental diabetes on lipid peroxidation and antioxidant enzyme activity in rat tissues.
  • To determine tissue-specific alterations in oxidative stress markers during diabetes.

Main Methods:

  • Diabetes was induced in male albino rats using alloxan.
  • Levels of malondialdehyde, hydroperoxides, conjugated dienes, and glutathione were measured.
  • Activities of antioxidant enzymes including superoxide dismutase, catalase, and glutathione S-transferase were assessed.
  • Serum ceruloplasmin levels were also analyzed.

Main Results:

  • Malondialdehyde and hydroperoxides increased in the liver and kidney, but decreased in the heart.
  • Conjugated dienes elevated in all studied tissues (liver, kidney, heart).
  • Glutathione levels decreased in the heart and kidney, but increased in the liver.
  • Superoxide dismutase and catalase activities decreased across all tissues, while glutathione S-transferase activity increased in the heart.

Conclusions:

  • Experimental diabetes activates lipid peroxidation in the liver and kidney of rats.
  • Heart tissue exhibits a degree of resistance to diabetes-induced lipid peroxidation.
  • Altered antioxidant enzyme profiles suggest a complex, tissue-specific response to oxidative stress in diabetes.

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