Abstract:
BACKGROUND:A hallmark feature of atherosclerosis is inflammation mediated by prostaglandins (PGs) catalyzed by the enzyme cyclooxygenase (COX). The present study explored whether the COX-2 G-765C polymorphism contributes to increased incidence of coronary heart disease (CHD) or stroke in the large prospective Atherosclerosis Risk in Communities (ARIC) Study. METHODS:Incidences of CHD and stroke were identified through annual follow-up and hospital and death certificate surveillance. The study included 1488 incident CHD and 527 stroke events after an average of 14 years of follow-up. The frequency of the -765C variant allele was markedly different between African-Americans and whites, therefore all analyses were performed separately by race. Due to the small number of persons with the -765CC genotype, heterozygous and homozygous variant genotypes were combined for this analysis. RESULTS:The COX-2 G-765C polymorphism was not a significant predictor of CHD in either racial group, but it was a significant predictor of incident stroke in African-Americans. After adjustment for age and gender, the hazard rate ratio for developing stroke for the CG+CC genotypes relative to the GG genotype was 1.34 (95% confidence interval [CI] 1.03-1.74, P=0.03) in African-Americans. This result was essentially unchanged when established predictors such as smoking, diabetes and hypertension were added to the model (HRR 1.34, 95%CI 1.03-1.76, P=0.03). CONCLUSION:We have found the COX-2 G-765C polymorphism to be a risk factor for incident stroke in African-Americans. This study provides additional evidence for utilizing inflammation-related genetic polymorphisms for identifying individuals at increased risk for stroke.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Kohsaka S,Volcik KA,Folsom AR,Wu KK,Ballantyne CM,Willerson JT,Boerwinkle Edoi
10.1016/j.atherosclerosis.2007.02.010subject
Has Abstractpub_date
2008-02-01 00:00:00pages
926-30issue
2eissn
0021-9150issn
1879-1484pii
S0021-9150(07)00117-7journal_volume
196pub_type
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