Lipid peroxidation and molecular damage to polyunsaturated fatty acids in rat liver. Recognition of two classes of hydroperoxides formed under conditions in vivo
- PMID: 3769049
- DOI: 10.1016/s0009-2797(86)80062-x
Lipid peroxidation and molecular damage to polyunsaturated fatty acids in rat liver. Recognition of two classes of hydroperoxides formed under conditions in vivo
Abstract
The diene conjugates formed during the autoxidation of microsomal lipid extracts, and in endoplasmic reticulum in vivo after exposing rats to CCl4 have been examined by second derivative absorption spectrophotometry. Within a few minutes after administering CCl4 to a rat there is a pronounced signal in microsomal lipid extracts that is ascribed to the cis-trans diene conjugates of microsomal polyunsaturated fatty acids. Somewhat later a second signal becomes evident that is ascribed to trans-trans isomers. The appearance of the trans-trans isomer is very strongly suppressed by prior administration of vitamin E to the rat. It is concluded that the relative contents of cis-trans and trans-trans dienes in lipid extracts of tissue reflect the tissue contents of hydrogen donors as already established for model experiments with polyunsaturated fatty acids in vitro.
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