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AMI is associated with polymorphisms in the NOS3 and FGB but not in PAI-1 genes in young adults

Marcelo Ferraz Sampaio1, Mario Hiroyuki Hirata, Rosario Dominguez Crespo Hirata

  • 1Instituto Dante Pazzanese de Cardiologia, Sao Paulo, SP, Brazil.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|November 28, 2006
PubMed

Insights

Genetic variations in NOS3 and FGB are linked to acute myocardial infarction (AMI) in young adults. These polymorphisms also correlate with hypertension and endothelial dysfunction, impacting cholesterol levels.

Area of Science:

  • Cardiovascular Genetics
  • Molecular Cardiology
  • Genetic Epidemiology

Background:

  • Investigating genetic predispositions for acute myocardial infarction (AMI) in young populations.
  • Examining the roles of nitric oxide synthase 3 (NOS3), fibrinogen (FGB), and plasminogen activator inhibitor-1 (PAI-1) gene polymorphisms.
  • Assessing the link between these polymorphisms and endothelial dysfunction, a key factor in cardiovascular disease.

Purpose of the Study:

  • To determine the association between specific polymorphisms in NOS3, FGB, and PAI-1 genes and the risk of AMI in young adults.
  • To evaluate the relationship between these genetic variations and markers of endothelial function and cardiovascular risk factors.

Main Methods:

  • Flow-mediated vasodilation (FMV) and nitrate-induced vasodilation (FMN) were used to assess endothelial function.
  • Standard biochemical assays measured lipid profiles, and plasma nitrate levels were determined.
  • Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) identified NOS3, FGB, and PAI-1 polymorphisms.

Main Results:

  • AMI patients exhibited higher levels of total cholesterol, LDL, triglycerides, PAI-1, and fibrinogen, with lower HDL and impaired FMV compared to controls.
  • NOS3 T-786C and FGB C-148T polymorphisms were significantly associated with increased AMI risk.
  • Specific NOS3 polymorphisms correlated with hypertension, altered cholesterol levels, and endothelial dysfunction.

Conclusions:

  • Genetic variations in NOS3 and FGB are implicated in the development of AMI among young adults.
  • NOS3 gene polymorphisms are further associated with hypertension, endothelial dysfunction, and dyslipidemia in this demographic.
  • These findings highlight the importance of genetic screening for cardiovascular risk assessment in younger individuals.
Abstract

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