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Endothelial nitric oxide synthase polymorphisms and erectile dysfunction: a meta-analysis.

Chunhui Liu1, Kai Lu1, Tao Tao1

  • 1Department of Urology, Affiliated Zhongda Hospital of Southeast University, Nanjing, China.

The Journal of Sexual Medicine
|May 6, 2015
PubMed
Summary
This summary is machine-generated.

Endothelial nitric oxide synthase (eNOS) gene variations, specifically G894T, 4 VNTR, and T786C, are linked to a higher risk of erectile dysfunction (ED). Further research is needed to confirm these preliminary findings in larger populations.

Keywords:
Erectile DysfunctionMeta-AnalysisPolymorphismeNOS

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Area of Science:

  • Genetics and Urology
  • Molecular Biology and Men's Health

Background:

  • Erectile dysfunction (ED) significantly impacts men's quality of life.
  • Previous studies suggest a link between endothelial nitric oxide synthase (eNOS) gene polymorphisms and ED, but results are inconsistent.

Purpose of the Study:

  • To conduct a meta-analysis to clarify the association between eNOS polymorphisms and the risk of developing ED.
  • To provide a comprehensive overview of the current evidence on eNOS gene variants and ED.

Main Methods:

  • A meta-analysis was performed, including 20 studies from 13 publications.
  • Literature search was conducted across PubMed, Web of Science, and CNKI databases up to December 1, 2014.
  • Odds ratios (ORs) with 95% confidence intervals were calculated using random or fixed effects models.

Main Results:

  • The eNOS G894T polymorphism was associated with increased ED risk (OR = 1.514, CI: 1.019-2.248).
  • Four VNTR polymorphisms showed a significant association in homozygote comparison and recessive models (OR = 1.917, CI: 1.073-3.424).
  • The eNOS T786C polymorphism also increased ED risk across multiple models (OR = 1.588, CI: 1.316-1.915).

Conclusions:

  • Specific eNOS polymorphisms (G894T, 4 VNTR, T786C) are associated with an elevated risk of erectile dysfunction.
  • These findings are preliminary and require validation through larger studies considering various confounders.