Common variants at 6p21.1 are associated with large artery atherosclerotic stroke

Nat Genet. 2012 Oct;44(10):1147-51. doi: 10.1038/ng.2397. Epub 2012 Sep 2.

Abstract

Genome-wide association studies (GWAS) have not consistently detected replicable genetic risk factors for ischemic stroke, potentially due to etiological heterogeneity of this trait. We performed GWAS of ischemic stroke and a major ischemic stroke subtype (large artery atherosclerosis, LAA) using 1,162 ischemic stroke cases (including 421 LAA cases) and 1,244 population controls from Australia. Evidence for a genetic influence on ischemic stroke risk was detected, but this influence was higher and more significant for the LAA subtype. We identified a new LAA susceptibility locus on chromosome 6p21.1 (rs556621: odds ratio (OR)=1.62, P=3.9×10(-8)) and replicated this association in 1,715 LAA cases and 52,695 population controls from 10 independent population cohorts (meta-analysis replication OR=1.15, P=3.9×10(-4); discovery and replication combined OR=1.21, P=4.7×10(-8)). This study identifies a genetic risk locus for LAA and shows how analyzing etiological subtypes may better identify genetic risk alleles for ischemic stroke.

Publication types

  • Meta-Analysis
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Case-Control Studies
  • Cerebral Infarction / genetics*
  • Chromosomes, Human, Pair 6*
  • Genetic Predisposition to Disease
  • Genome-Wide Association Study
  • Humans
  • Intracranial Arteriosclerosis / genetics*
  • Linkage Disequilibrium
  • Odds Ratio
  • Polymorphism, Single Nucleotide*

Grant support