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Lipid oxidation in atherogenesis: an overview.
W Jessup1, L Kritharides, R Stocker
1Centre for Vascular Research, School of Medical Sciences, University of New South Wales, Sydney, NSW 2052, Australia. w.jessup@unsw.edu.au
Biochemical Society Transactions
|January 30, 2004
Summary
The oxidation theory suggests oxidized lipids cause atherosclerosis. However, studies on antioxidants like Vitamin E show limited success, indicating more research is needed on oxidants and antioxidant properties.
Area of Science:
- Cardiovascular Research
- Biochemistry
- Pathology
Background:
- Atherosclerosis development is linked to oxidized lipids and proteins.
- Intimal low-density lipoprotein is a primary target for oxidation.
- In vitro oxidized lipoproteins exhibit pro-atherogenic properties.
Purpose of the Study:
- To evaluate the 'oxidation theory' of atherosclerosis.
- To assess the efficacy of antioxidants, specifically Vitamin E, in preventing atherosclerosis.
- To identify gaps in knowledge regarding oxidants and antioxidant actions in atherosclerosis.
Main Methods:
- Review of studies investigating oxidized lipoproteins and their effects.
- Analysis of evidence for oxidation products in atherosclerotic lesions.
- Examination of clinical and animal studies using Vitamin E for atherosclerosis prevention.
Main Results:
- Oxidation products are detected in atherosclerotic lesions, though less oxidized than in vitro counterparts.
- Vitamin E has shown limited anti-atherosclerotic potential in human and animal studies.
- The specific oxidants driving lesion oxidation remain unidentified.
Conclusions:
- The oxidation theory requires further investigation due to unresolved questions about oxidants.
- The complex antioxidant/pro-oxidant nature of Vitamin E may explain its limited efficacy.
- More research is needed to fully test the oxidation theory of atherosclerosis.