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Updated: Apr 12, 2026

En Face Detection of Nitric Oxide and Superoxide in Endothelial Layer of Intact Arteries
Published on: February 25, 2016
Endothelial nitric oxide synthase genotypes modulate peripheral vasodilatory properties after myocardial infarction
Wilcelly Machado-Silva1, Rossana Alfinito-Kreis1, Luiz Sérgio F Carvalho1
1Universidade de Brasília (UnB), Brasília, DF, Brazil.
Background:
Studies in population genetics suggest an important relationship between the eNOS G894T polymorphism and occurrence of acute myocardial infarction (AMI), with little known on its influence on the post-AMI period.
Aim:
To investigate the association of allelic variants produced by the G894T transversion in eNOS (rs1799983) with post-AMI variables.
Methods:
Cross-sectional analyses of anthropometric, clinical and laboratory assessments obtained within the first 24h and after 5 and 30 days of the AMI event across T carriers and G homozygotes of eNOS in 371 consecutive cases of AMI with ST-segment elevation admitted to a Brazilian emergency service in cardiology. Genotypes were determined by polymerase chain reaction followed by enzymatic restriction.
Results:
Despite no difference between genotypic groups on aspects as Killip-Kimbal classification scores, extension of infarcted mass, lipid profile or pattern of medication use, an increase in serum nitric oxide from admission to day 5 was higher for T carriers (p<0.001). Thirty days post-AMI, peripheral blood flow reserve was larger among T carriers either by flow- (p=0.037) and nitrate-mediated (p=0.040) dilation testing.
Conclusion:
Our results suggest an association of the eNOS 894T allele with an apparent improvement in late arterial function in post-AMI patients.
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