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The Content of Lipoperoxidation Products in Normal and Atherosclerotic Human Aorta

Overview

Overview

Journal Mol Cell Biochem

Publisher Springer

Specialty Biochemistry

Date 2001 Nov 22

PMID 11716360

Citations 1

Authors

Authors

V V Tertov

V V Kaplun

I A Mikhailova

I V Suprun

A N Orekhov

Affiliations

Affiliations

Soon will be listed here.

Abstract

To evaluate the role of lipid oxidation in atherogenesis the levels of lipid- and protein-bound products of peroxidation in normal and atherosclerotic areas of human aorta were investigated. The level of fluorescent (360/430 nm) lipid products was measured in chloroform-methanol extracts of aortic tissue. Normal intima, initial lesions and fatty streaks had a similar content of fluorescent substances. On the other hand, high level of fluorescent products was found in atherosclerotic plaques. Cholesterol covalently bound to proteins, which serve as a marker of lipoperoxidation, was measured by high performance liquid chromatography after mild alkaline hydrolysis of delipidated tissue protein samples. The levels of protein-bound cholesterol in initial lesions and fatty streaks were close to its content in uninvolved intima (59 +/- 18 and 92 +/- 18 vs. 70 +/- 13 nmol/g protein). The content of covalently bound cholesterol in atherosclerotic plaques was dramatically higher (90-fold) than in the normal tissue. In addition to protein-bound cholesterol, considerable amount of lipofuscin was revealed in the cells of atherosclerotic plaques, but not in the cells of normal intima, initial lesions or fatty streaks. Thus, the contents of all investigated lipid- and protein-bound products of lipoperoxidation in earlier atherosclerotic lesions were similar to their levels in normal tissue. It can be due to a low rate of oxidized product formation and/or high rate of its degradation in or elimination from the vessel wall.

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