PATHWAYS FOR OXIDATION OF LOW DENSITY LIPOPROTEIN BY MYELOPEROXIDASE

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Many lines of evidence implicate oxidation of low density lipoprotein (LDL) in the pathogenesis of atherosclerosis, a chronic inflammatory disease. The physiologically relevant mechanisms have not been identified, but phagocytic white cells may play an important role because macrophage-rich lesions characterize the disorder. This article reviews the enzyme's ability to generate a range of oxidants, including tyrosyl radical, reactive aldehydes, hypochlorous acid and molecular chlorine. These products have the potential to damage host molecules as well as microbes, suggesting a mechanism that may contribute to atherosclerotic vascular disease.