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Published on: April 2, 2017
Copper-mediated oxidative stress in rat liver.
Dervis Ozcelik1, Resat Ozaras, Zafer Gurel
1Department of Biophysics, Cerrahpasa Medical Faculty, University of Istanbul, Istanbul, Turkey.
Biological Trace Element Research
|January 13, 2004
Summary
Excess copper is toxic, increasing oxidative stress and depleting glutathione reserves in rats. This makes the organism more vulnerable to further oxidative damage.
Area of Science:
- Biochemistry
- Toxicology
- Trace Elements
Background:
- Copper is essential but toxic in excess, causing oxidative damage.
- High copper levels lead to liver pathology and cellular dysfunction.
- Oxidative stress is implicated in copper toxicity.
Purpose of the Study:
- To investigate the effects of excess copper on oxidative and antioxidative markers.
- To evaluate copper-induced oxidative stress in plasma and liver tissue.
- To assess the impact of copper exposure on lipid peroxidation and antioxidant defenses in rats.
Main Methods:
- Rats were divided into control and copper-exposed groups (100 microg/mL).
- Plasma and liver tissues were analyzed for superoxide dismutase (SOD) activity.
- Malondialdehyde (MDA) and glutathione (GSH) levels were measured in plasma and liver.
Main Results:
- Copper exposure increased plasma and liver SOD activity.
- Plasma MDA levels were elevated, but liver MDA levels were comparable between groups.
- Liver glutathione (GSH) levels were significantly lower in copper-exposed rats.
Conclusions:
- Excess copper induces oxidative stress and increases lipid peroxidation.
- Copper exposure depletes hepatic glutathione reserves.
- These effects suggest increased vulnerability to oxidative challenges.
