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Species difference in plasma antioxidant activity
N Koçak-Toker1, D Ayribaş, M Uysal
1University of Istanbul, Istanbul Faculty of Medicine, Department of Biochemistry, Turkey.
Summary
Rats and guinea pigs have low plasma antioxidant activity, making them susceptible to lipid peroxidation. Rabbits and humans exhibit high antioxidant activity, correlating with low lipid peroxidation susceptibility.
Area of Science:
- Biochemistry
- Comparative Physiology
- Oxidative Stress Research
Background:
- Oxidative stress, caused by an imbalance between free radicals and antioxidants, contributes to various diseases.
- Lipid peroxidation is a key indicator of oxidative damage, particularly in cell membranes.
Purpose of the Study:
- To compare plasma antioxidant activity across different species.
- To investigate the relationship between antioxidant levels and susceptibility to lipid peroxidation.
Main Methods:
- Assessing plasma antioxidant capacity in rats, guinea pigs, rabbits, and humans.
- Measuring red blood cell susceptibility to lipid peroxidation in these species.
Main Results:
- Rats and guinea pigs displayed low plasma antioxidant activity and high susceptibility to lipid peroxidation.
- Rabbits and humans demonstrated high plasma antioxidant activity and low susceptibility to lipid peroxidation.
Conclusions:
- Species-specific differences in plasma antioxidant capacity exist.
- Higher antioxidant activity in plasma correlates with reduced susceptibility to lipid peroxidation.
