Association between the Advanced Glycosylation End Product-Specific Receptor Gene and Cardiovascular Death in Older Men

PLoS One. 2015 Jul 30;10(7):e0134475. doi: 10.1371/journal.pone.0134475. eCollection 2015.

Abstract

Advanced glycosylation end product-specific receptor (AGER) signaling has been implicated in atherosclerosis. The aim of this study was to evaluate whether a common genetic variation in the AGER gene is associated with cardiovascular (CV) death. We included 1304 older men who were genotyped for rs1035798:C>T, which is a single nucleotide polymorphism (SNP) mapped to the third intron of AGER. Cox proportional hazard analysis was used to estimate the association of rs1035798:C>T with CV death. In addition we analyzed total RNA extracted from carotid atherosclerosis biopsies of 18 patients that did or did not have recent symptoms of cerebral embolization by quantitative real-time reverse transcription PCR (qRT-PCR). The minor T-allele of rs1035798:C>T was found to be associated with CV death under dominant (HR = 1.43, 95% CI: 1.01-2.02, P = 0.04) and recessive (HR = 2.05, 95% CI: 1.11-3.81, P = 0.02) models of inheritance even after adjustment for traditional cardiovascular risk factors. No association was found between rs1035798:C>T and non-CV death. qRT-PCR results suggested that median relative expression of AGER isoform 1 and isoform 6 transcripts were approximately 6- (P = 0.01) and 2-fold (P = 0.02) greater, respectively, within carotid biopsies of symptomatic compared to asymptomatic patients. These data suggest that the minor (T) allele of rs1035798:C>T represents an independent susceptibility factor for CV death. The expression of AGER isoforms is different in atheroma from patients with recent symptoms. Further studies are needed to investigate if rs1035798:C>T influences the alternative splicing of AGER.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cardiovascular Diseases / genetics*
  • Cardiovascular Diseases / mortality*
  • Genotype
  • Humans
  • Male
  • Proportional Hazards Models
  • Receptor for Advanced Glycation End Products / genetics*
  • Survival Analysis

Substances

  • AGER protein, human
  • Receptor for Advanced Glycation End Products

Grants and funding

The Townsville Private Practice Trust Fund (http://www.health.qld.gov.au/; RG04213), Australia, The National Health and Medical Research Council (http://www.nhmrc.gov.au/; 1022752, 1021416, 1020955, 1003707 and 1000967), The National Heart Foundation of Australia (http://www.heartfoundation.org.au/), and The Queensland Government supported this work. JG holds a Practitioner Fellowship from the National Health and Medical Research Council, Australia (1019921), and a Senior Clinical Research Fellowship from the Health and Medical Research Office, Queensland Government.