Abdominal aortic aneurysm is associated with a variant in low-density lipoprotein receptor-related protein 1. Academic Article uri icon

Overview

MeSH

  • Aged
  • Case-Control Studies
  • Cell Line, Tumor
  • Data Interpretation, Statistical
  • Female
  • Follow-Up Studies
  • Genetic Predisposition to Disease
  • Genome-Wide Association Study
  • Homozygote
  • Humans
  • Male
  • Odds Ratio
  • Organ Specificity
  • Risk Factors
  • Sterol Regulatory Element Binding Protein 1

MeSH Major

  • Aorta
  • Aortic Aneurysm, Abdominal
  • Genetic Loci
  • Low Density Lipoprotein Receptor-Related Protein-1
  • Polymorphism, Single Nucleotide

abstract

  • Abdominal aortic aneurysm (AAA) is a common cause of morbidity and mortality and has a significant heritability. We carried out a genome-wide association discovery study of 1866 patients with AAA and 5435 controls and replication of promising signals (lead SNP with a p value < 1 × 10(-5)) in 2871 additional cases and 32,687 controls and performed further follow-up in 1491 AAA and 11,060 controls. In the discovery study, nine loci demonstrated association with AAA (p < 1 × 10(-5)). In the replication sample, the lead SNP at one of these loci, rs1466535, located within intron 1 of low-density-lipoprotein receptor-related protein 1 (LRP1) demonstrated significant association (p = 0.0042). We confirmed the association of rs1466535 and AAA in our follow-up study (p = 0.035). In a combined analysis (6228 AAA and 49182 controls), rs1466535 had a consistent effect size and direction in all sample sets (combined p = 4.52 × 10(-10), odds ratio 1.15 [1.10-1.21]). No associations were seen for either rs1466535 or the 12q13.3 locus in independent association studies of coronary artery disease, blood pressure, diabetes, or hyperlipidaemia, suggesting that this locus is specific to AAA. Gene-expression studies demonstrated a trend toward increased LRP1 expression for the rs1466535 CC genotype in arterial tissues; there was a significant (p = 0.029) 1.19-fold (1.04-1.36) increase in LRP1 expression in CC homozygotes compared to TT homozygotes in aortic adventitia. Functional studies demonstrated that rs1466535 might alter a SREBP-1 binding site and influence enhancer activity at the locus. In conclusion, this study has identified a biologically plausible genetic variant associated specifically with AAA, and we suggest that this variant has a possible functional role in LRP1 expression. Copyright © 2011 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.

authors

publication date

  • November 11, 2011

has subject area

  • Aged
  • Aorta
  • Aortic Aneurysm, Abdominal
  • Case-Control Studies
  • Cell Line, Tumor
  • Data Interpretation, Statistical
  • Female
  • Follow-Up Studies
  • Genetic Loci
  • Genetic Predisposition to Disease
  • Genome-Wide Association Study
  • Homozygote
  • Humans
  • Low Density Lipoprotein Receptor-Related Protein-1
  • Male
  • Odds Ratio
  • Organ Specificity
  • Polymorphism, Single Nucleotide
  • Risk Factors
  • Sterol Regulatory Element Binding Protein 1

Research

keywords

  • Journal Article

Identity

Language

  • eng

PubMed Central ID

  • PMC3213391

Digital Object Identifier (DOI)

  • 10.1016/j.ajhg.2011.10.002

PubMed ID

  • 22055160

Additional Document Info

start page

  • 619

end page

  • 627

volume

  • 89

number

  • 5