Increased aldehyde-modification of collagen type IV in symptomatic plaques--a possible cause of endothelial dysfunction

Atherosclerosis
Pontus DunérEva Bengtsson

Abstract

Subendothelial LDL-adhesion and its subsequent oxidation are considered as key events in the development of atherosclerotic lesions. During oxidation of LDL, reactive aldehydes such as malondialdehyde (MDA) are formed, which modify apolipoprotein B100. However, the possibility that these reactive aldehydes could leak out of the LDL-particle and modify surrounding extracellular matrix proteins has been largely unexplored. We have investigated if aldehyde-modification of collagen type IV, one of the major basement membrane components, in plaques is associated with cardiovascular events. The amount of MDA-modified collagen type IV and native collagen type IV were determined in homogenates from 155 carotid artery lesions, removed by endarterectomy from patients with or without previous cerebrovascular events. Plaque MDA-collagen type IV, but not native collagen type IV, correlated with oxidized LDL (r=0.31, P<0.001) and lipoprotein-associated phospholipase A2 (r=0.44, P<0.001). MDA-collagen type IV was increased in lesions from symptomatic patients compared to lesions from asymptomatic patients. Auto-antibodies against MDA-collagen type IV in plasma correlated with the amount of MDA-collagen type IV in lesions. MDA-modification of ...Continue Reading

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Citations

Jun 15, 2015·Redox Biology·Giancarlo AldiniDolores Pérez-Sala
Mar 5, 2016·Journal of Internal Medicine·M LynchM Mayr
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Feb 23, 2020·Frontiers in Bioengineering and Biotechnology·Yudi DengMiaomiao Yuan
Aug 28, 2021·Cardiovascular Research·Florentina PorschChristoph J Binder

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