Document Detail


Purinergic receptor distribution in endothelial cells in blood vessels: a basis for selection of coronary artery grafts.
MedLine Citation:
PMID:  11947897     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Expression levels of the purinergic P2X receptor subunits (P2X(1) to P2X(7)) and P2Y(2) were examined in the endothelial cell layer of internal mammary artery (Ann. Thorac. Surg. 54 (1992) 652), radial artery (Ann. Thorac. Surg. 16 (1973) 111) and saphenous vein (Ann. Thorac. Surg. 20 (1975) 628) samples obtained at surgery for coronary artery bypass grafts using immunohistochemistry and confocal microscopy. Similar levels of P2X(1), P2X(2), P2X(3), P2X(7) and P2Y(2) were found in the endothelial cells in all vessels examined while the levels of P2X(5) and P2X(6) were uniformly lower. A clear difference was measured in P2X(4) expression between arteries and veins. Both radial and internal mammary arteries exhibited very low levels of P2X(4) whereas the level in the saphenous vein was 14.6 fold higher (P<0.0001), approaching that of the major receptor subtypes. These data showing strong expression of P2X(4) in veins have implications for the choice of vessels used in coronary artery bypass grafts given that P2X(4) is involved in calcium influx into endothelial cells, modulates blood vessel contractility and is up-regulated in situations involving intima proliferation suggesting vein grafts are more susceptible to developing atherosclerosis.
Authors:
Fiona R Ray; William Huang; Michael Slater; Julian A Barden
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Atherosclerosis     Volume:  162     ISSN:  0021-9150     ISO Abbreviation:  Atherosclerosis     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-04-11     Completed Date:  2002-06-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0242543     Medline TA:  Atherosclerosis     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  55-61     Citation Subset:  IM    
Affiliation:
Institute for Biomedical Research and Department of Anatomy and Histology, The University of Sydney, Sydney NSW 2006, Australia.
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MeSH Terms
Descriptor/Qualifier:
Antibody Specificity / immunology
Coronary Artery Bypass
Endothelium, Vascular / cytology*,  metabolism*
Fluorescent Antibody Technique
Humans
Immunohistochemistry
Immunophenotyping
Mammary Arteries / cytology*,  metabolism*
Muscle, Smooth, Vascular / cytology,  metabolism
Radial Artery / cytology*,  metabolism*
Receptors, Purinergic P2 / biosynthesis*,  blood*,  immunology
Saphenous Vein / cytology*,  metabolism*
Chemical
Reg. No./Substance:
0/Receptors, Purinergic P2

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


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