alexa A smoking-dependent risk of coronary artery disease associated with a polymorphism of the endothelial nitric oxide synthase gene.
General Science

General Science

Biological Systems: Open Access

Author(s): Wang XL, Sim AS, Badenhop RF, McCredie RM, Wilcken DE

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Abstract Endothelium-dependent vasodilatation is mediated by release of nitric oxide formed by constitutively expressed endothelial nitric oxide synthase (ecNOS). We explored the distribution of polymorphism ecNOS4a/b in 549 subjects with, and 153 without, coronary artery disease in relation to smoking. In current and ex-cigarette smokers, but not nonsmokers, there was a significant excess of homozygotes for the rare ecNOS4a allele in patients with severely stenosed arteries, compared with those with no or mild stenosis. This genotype was also associated with a history of myocardial infarction. This smoking-dependent excess coronary risk in ecNOS4a homozygotes is consistent with predisposition to endothelial dysfunction.
This article was published in Nat Med and referenced in Biological Systems: Open Access

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