Document Detail


Glycosaminoglycan fractions from human arteries presenting diverse susceptibilities to atherosclerosis have different binding affinities to plasma LDL.
MedLine Citation:
PMID:  8274466     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The topographic distribution of atherosclerotic lesions is influenced by biochemical factors intrinsic to the arterial wall. In the present work we have investigated whether the composition/chemical structure of glycosaminoglycans constitutes one of these factors. Normal human arteries were obtained at necropsy, and in order of decreasing susceptibility to atherosclerosis, consisted of the abdominal and thoracic aortas and the iliac and pulmonary arteries. The results showed similar concentrations of total glycosaminoglycan and collagen. Of the glycosaminoglycans known to interact with low-density lipoprotein (LDL), dermatan sulfate was present in all arteries in comparable concentrations, but the aortas had a 30% higher content of chondroitin 4/6-sulfate, which in turn was slightly enriched in 6-sulfated disaccharide units. LDL-affinity chromatography with dermatan sulfate+chondroitin 4/6-sulfate fractions demonstrated that increasing affinity to LDL matched an increasing susceptibility to atherosclerosis. Analysis of glycosaminoglycans in the eluates indicated a positive correlation between affinity to LDL and increasing molecular weight and the existence of a fraction of glycosaminoglycans of high affinity to LDL in the aortas only. These results suggest that arterial glycosaminoglycans participate in the multifactorial mechanisms that modulate the differential localization of atherosclerotic lesions.
Authors:
L E Cardoso; P A Mourão
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Arteriosclerosis and thrombosis : a journal of vascular biology / American Heart Association     Volume:  14     ISSN:  1049-8834     ISO Abbreviation:  Arterioscler. Thromb.     Publication Date:  1994 Jan 
Date Detail:
Created Date:  1994-02-04     Completed Date:  1994-02-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9101388     Medline TA:  Arterioscler Thromb     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  115-24     Citation Subset:  IM    
Affiliation:
Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Brazil.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aorta, Abdominal / chemistry
Aorta, Thoracic / chemistry
Arteries / chemistry*
Arteriosclerosis / etiology*,  metabolism
Chondroitin Sulfates / analysis,  metabolism
Chromatography, Affinity
Dermatan Sulfate / analysis,  metabolism
Glycosaminoglycans / analysis*,  metabolism*
Humans
Iliac Artery / chemistry
Lipoproteins, LDL / blood*
Pulmonary Artery / chemistry
Chemical
Reg. No./Substance:
0/Glycosaminoglycans; 0/Lipoproteins, LDL; 24967-94-0/Dermatan Sulfate; 9007-28-7/Chondroitin Sulfates

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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