Modification of low-density lipoproteins by low molecular weight carbonyl products of free-radical oxidation of lipids and carbohydrates plays a key role in atherosclerotic lesion of the vascular wall and in endothelial dysfunction

Abstract

The review presents evidence of the participation of low-density lipoproteins (LDL) modified by low molecular weight dicarbonyl compounds formed during freeradical oxidation of lipids (malondialdehyde) and carbohydrates in the development of endothelial dysfunction and atherosclerotic vascular lesions. The authors believe that it is they, and not oxidized (hydroperoxide-containing) LDL, that are the main factors of pathogenesis. The role of dicarbonyl-modified LDL in LOX-1 dependent induction of processes leading to the development of endothelial dysfunction is discussed. The results of studies proving that damage to the glycocalyx (a layer of macromolecules that prevent the development of endothelial dysfunction) covering the luminal surface of the endothelium is caused by hyperproduction of reactive oxygen species. Ways of pharmacological correction of free-radical oxidation processes are discussed, due to which inhibition of atherogenesis and diabetogenesis can be achieved.

Keywords

• malondialdehyde
• methylglyoxal
• endothelial dysfunction
• glycocalyx
• low density lipoproteins
• free radicals
• atherosclerosis
• diabetes mellitus