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Disease Markers
Volume 34, Issue 6, Pages 431-436

eNOS Gene Variants and the Risk of Premature Myocardial Infarction

Aggeliki-Maria Zigra,1 Loukianos S. Rallidis,2 Georgia Anastasiou,1 Efrossyni Merkouri,1 and Argyri Gialeraki1

1Laboratory of Haematology and Blood Transfusion Unit, Attikon Hospital, School of Medicine, University of Athens, Athina, Greece
2Second Department of Cardiology, Attikon Hospital, School of Medicine, University of Athens, Athina, Greece

Received 12 April 2013; Accepted 12 April 2013

Copyright © 2013 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


BACKGROUND: Endothelial nitric oxide synthase (eNOS) as well as nitric oxide play an important role in the regulation of cardiovascular function. There are limited and controversial data regarding the impact of polymorphisms of eNOS gene that is implicated in the vasoconstrictive properties of the endothelium in the pathogenesis of premature myocardial infarction (MI).

OBJECTIVE: We examined whether two common polymorphisms of eNOS gene (G894T and T786C) are associated with the development of premature MI.

METHODS: We recruited 107 patients with premature MI and compared them to 103 age- and sex- matched controls. All patients underwent coronary angiogram and were classified into the subgroup of patients with ‘normal’ or ‘near normal’ coronary arteries and the subgroup of patients with significant coronary artery disease (≥ 50% stenosis in lumen diameter of coronary arteries). The genetic polymorphisms of eNOS gene were assayed with polymerase chain reaction and reverse hybridization.

RESULTS: Nineteen patients (17.8%) had ‘normal’ or ‘near normal’ coronary arteries. A significantly higher frequency of homozygosity for the 786C (32%) and the 894T (21%) alleles of the eNOS gene in patients who develop early MI in the setting of angiographically 'normal' or 'near normal' coronary arteries were found.

CONCLUSIONS: Our data suggest that the T786C and the G894T genetic polymorphisms are associated with the development of MI in very young individuals, whose coronary arteries are characterized by very small atheromatic burden.