The shared allelic architecture of adiponectin levels and coronary artery disease

Atherosclerosis. 2013 Jul;229(1):145-8. doi: 10.1016/j.atherosclerosis.2013.03.034. Epub 2013 Apr 22.

Abstract

Objective: A large body of epidemiologic data strongly suggests an association between excess adiposity and coronary artery disease (CAD). Low adiponectin levels, a hormone secreted only from adipocytes, have been associated with an increased risk of CAD in observational studies. However, these associations cannot clarify whether this relationship is causal or due to a shared set of causal factors or even confounding. Genome-wide association studies have identified common variants that influence adiponectin levels, providing valuable tools to examine the genetic relationship between adiponectin and CAD.

Methods: Using 145 genome wide significant SNPs for adiponectin from the ADIPOGen consortium (n = 49,891), we tested whether adiponectin-decreasing alleles influenced risk of CAD in the CARDIoGRAM consortium (n = 85,274).

Results: In single-SNP analysis, 5 variants among 145 SNPs were associated with increased risk of CAD after correcting for multiple testing (P < 4.4 × 10(-4)). Using a multi-SNP genotypic risk score to test whether adiponectin levels and CAD have a shared genetic etiology, we found that adiponectin-decreasing alleles increased risk of CAD (P = 5.4 × 10(-7)).

Conclusion: These findings demonstrate that adiponectin levels and CAD have a shared allelic architecture and provide rationale to undertake a Mendelian randomization studies to understand if this relationship is causal.

Publication types

  • Meta-Analysis
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adiponectin / genetics*
  • Adiposity / genetics*
  • Alleles
  • Atherosclerosis / epidemiology
  • Atherosclerosis / genetics
  • Coronary Artery Disease / epidemiology*
  • Coronary Artery Disease / genetics*
  • Databases, Genetic
  • Genetic Predisposition to Disease / epidemiology
  • Genetic Predisposition to Disease / genetics
  • Genome-Wide Association Study
  • Genotype
  • Humans
  • Male
  • Polymorphism, Single Nucleotide
  • Prevalence
  • Risk Factors

Substances

  • ADIPOQ protein, human
  • Adiponectin