R643G polymorphism in PECAM-1 influences transendothelial migration of monocytes and is associated with progression of CHD and CHD events.
The 643R allele of R643G polymorphism (also known as R670G in the premature protein) in PECAM-1 has been associated with risk of myocardial infarction (MI), while the 643G allele has been associated with risk of coronary artery stenosis (CAS). The aim of this study was to investigate this apparently conflicting association. The association of R643G with risk of MI was determined in the second Northwick Park Heart study (2037 men with 138 CHD events; mean age: 56 years). Smokers homozygous for the 643R allele showed increased risk of MI with a hazard ratio of 2.47 (95% CI: 1.23-4.97; P=0.01) compared to smokers homozygous for the 643G allele. Progression of disease was determined in the Lopid Coronary Angiography Trial (279 men; mean age: 58.9 years). The 643G homozygotes showed greater focal (-0.08 +/- 0.02 mm) and diffuse (-0.01 +/- 0.01 mm) progression of CAS compared to 643R homozygotes (-0.02 +/- 0.02 mm and 0.001 +/- 0.01 mm, respectively; P=0.04). While there was no genotype effect on platelet aggregation, PECAM-1 tyrosine phosphorylation in HUVECs of GG genotype was 2.4-fold greater (P <0.01) than cells of RR genotype, and the level of transendothelial migration of monocytes of GG genotype was greater than that of monocytes of RR genotype following stimulation with either IL-1beta (12% higher, P <0.01) or TNF-alpha (10% higher, P=0.05). These data confirm the association of the R643G polymorphism with MI and CAS and suggest that greater influx of monocytes in individuals homozygous for the 643G may explain the association with CAS.
Centre for Cardiovascular Genetics, British Heart Foundation Laboratories, Rayne Building, 5 University Street, UCL, London WC1E 6JF, UK. mohamed_elrayess@eisai.net
Mohamed A
MA
Elrayess
Karen E
KE
Webb
Geoff J
GJ
Bellingan
Ros A
RA
Whittall
Jahangir
J
Kabir
Emma
E
Hawe
Mikko
M
Syvänne
Marja-Riitta
MR
Taskinen
M Heikki
MH
Frick
Markku S
MS
Nieminen
Y Antero
YA
Kesäniemi
Amos
A
Pasternack
George J
GJ
Miller
Steve E
SE
Humphries
D002465:Cell Movement / Q000502:physiology*; D002478:Cells, Cultured; D003327:Coronary Disease / Q000235:genetics*; D018450:Disease Progression; D004730:Endothelium, Vascular / Q000166:cytology; D006801:Humans; D009000:Monocytes / Q000502:physiology*; D010974:Platelet Aggregation; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000235:genetics*; D011110:Polymorphism, Genetic; D012307:Risk Factors
D019408:Platelet Endothelial Cell Adhesion Molecule-1