Coronary artery disease-associated locus on chromosome 9p21 and early markers of atherosclerosis

Arterioscler Thromb Vasc Biol. 2008 Sep;28(9):1679-83. doi: 10.1161/ATVBAHA.108.170332. Epub 2008 Jul 3.

Abstract

Background: Genome-wide association studies have recently identified a locus on chromosome 9p21 that influences risk of coronary artery disease (CAD). The effect of the locus on early markers of atherosclerosis is unknown. We examined its association with carotid intima-media thickness (CIMT) and brachial flow-mediated dilatation (FMD).

Methods and results: We genotyped 2277 individuals, age 24 to 39 years, from the Cardiovascular Risk in Young Finns Study with CIMT and FMD measurements and 1295 individuals, age 46 to 76 years, from the Health 2000 Survey with CIMT for rs1333049, the chromosome 9p21 variant showing the strongest association with CAD. Both mean and maximum CIMT were significantly higher (P<0.001) in the older subjects of the Health 2000 Survey compared with the Young Finns Study. However, there was no association of the rs1333049 genotype with either mean or maximum CIMT at either age (P=0.959 and 0.977 for the 2 phenotypes in the Young Finns Study and P=0.714 and 0.725 in the Health 2000 Survey). Similarly, there was no association of the locus with variation in FMD in the Young Finns cohort (P=0.521).

Conclusions: The chromosome 9p21 locus does not influence CAD risk through a mechanism that also affects CIMT or induces early changes in FMD.

Publication types

  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Brachial Artery / diagnostic imaging
  • Brachial Artery / physiopathology*
  • Carotid Arteries / diagnostic imaging
  • Carotid Arteries / pathology*
  • Carotid Artery Diseases / complications
  • Carotid Artery Diseases / genetics*
  • Carotid Artery Diseases / pathology
  • Carotid Artery Diseases / physiopathology
  • Chromosomes, Human, Pair 9*
  • Cohort Studies
  • Coronary Artery Disease / genetics*
  • Cross-Sectional Studies
  • Female
  • Finland
  • Genetic Predisposition to Disease
  • Humans
  • Male
  • Middle Aged
  • Phenotype
  • Risk Factors
  • Ultrasonography
  • Vasodilation*