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Alkane production by isolated rat heart and lung
S Dutta1, A Müller, T Ishikawa
1Department of Pharmacology, Wayne State University, Detroit, MI 48201.
Toxicology Letters
|November 1, 1988
Summary
Cumene hydroperoxide significantly increases lipid peroxidation in isolated rat hearts and lungs, indicated by ethane and pentane release. Lung lipid composition may explain lower alkane production compared to the heart.
Area of Science:
- Biochemistry
- Toxicology
- Cardiovascular Research
Background:
- Lipid peroxidation is a key indicator of oxidative stress.
- Alkanes like ethane and pentane are biomarkers of lipid peroxidation.
- Understanding organ-specific responses to oxidative damage is crucial.
Purpose of the Study:
- To investigate the induction of lipid peroxidation in isolated rat heart and lung preparations.
- To compare the effects of different hydroperoxides on alkane production and glutathione levels.
- To explore the role of lipid composition in organ susceptibility to oxidative stress.
Main Methods:
- Isolated perfused rat heart and lung preparations were used.
- Cumene hydroperoxide and tert-butyl hydroperoxide were infused to induce lipid peroxidation.
- Ethane and pentane evolution were measured as indicators of lipid peroxidation.
- Glutathione and oxidized glutathione levels were quantified.
Main Results:
- Cumene hydroperoxide significantly increased ethane and pentane release in both hearts and lungs.
- Lungs exhibited approximately half the alkane production compared to hearts.
- Tert-butyl hydroperoxide also elevated alkane production and altered glutathione status.
- 4-Hydroxynonenal depleted cardiac glutathione, while paraquat had minimal effects.
Conclusions:
- Hydroperoxides effectively induce lipid peroxidation in isolated rat organs.
- Differences in lung and heart lipid composition may influence peroxidative degradation resistance.
- Specific oxidative agents have distinct impacts on cardiac glutathione homeostasis.