Abstract
A crucial step in the pathogenesis of atherosclerosis is believed to be the oxidative modification of low density lipoprotein (LDL). The oxidation of LDL is a free radical driven lipid peroxidation process and the aldehyde products of lipid hydroperoxide breakdown are responsible for the modification of the LDL apoprotein. Aldehyde-modified apoB protein has altered receptor affinity, causing it to be scavenged by macrophages in an uncontrolled manner with the development of foam cells and the initiation of the atherosclerotic lesion. The aldehydic products of lipid peroxidation may also be involved in other aspects of the development of the lesion. The oxidation of LDL may be prevented by its endogenous antioxidant compounds, most prominent of which is alpha-tocopherol. Consequently, an improved antioxidant status may offer possibilities for the prevention of this major disease.
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