Background: The relationship between polymorphisms in the genes for plasminogen activator inhibitor type 1(PAI-1) and platelet glycoprotein IIIa (PGIIIa), clinical and environmental features, and the risk of premature coronary heart disease (CHD) in Asian Indian subjects living in South Africa, has been investigated.
Methods: The prevalence of the PAI-1 promoter 4G/5G and the PGIIIa PI A1A2 polymorphisms was examined in 195 unrelated Asian Indian patients (
Results: Overall, neither the PAI-1 4G/5G nor the PGIIIa PI A1A2 polymorphism demonstrated an independent risk for MI. No synergistic effect was observed between these two polymorphisms when analysed together. There was a marginal association between the 4G allele of the PAI-1 gene and the risk of MI in individuals who smoked compared with non-smokers (26 vs 11%; p = 0.028; OR 2.74; 95% CI 1.04-8.47). The PGIIIa PI A2 allele was, however, strongly associated with a previous history of MI (17 vs 6%; p = 0.004; OR 3.00; 95% CI 1.38-6.46), as well as the severity of disease as determined by angiography (single/double- vs triple-vessel disease: 3% vs 15%; p = 0.020; OR 0.19; 95% CI 0.02-0.92).
Conclusion: In young Asian Indians who smoke, the PAI-1 4G allele is a mild risk factor for the development of MI. The PGIIIa PI A2 allele constitutes a significant risk for individuals who have a previous history of MI, as well as serving as an indicator for the severity of CHD.
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