title: Genetic variants from lipid-related pathways and risk for incident myocardial infarction.
abstract: BACKGROUND
  Circulating lipids levels, as well as several familial lipid metabolism disorders, are strongly associated with initiation and progression of atherosclerosis and incidence of myocardial infarction (MI).
  
  
  OBJECTIVE
  We hypothesized that genetic variants associated with circulating lipid levels would also be associated with MI incidence, and have tested this in three independent samples.
  
  
  METHODS
  Using age- and sex-adjusted additive genetic models, we analyzed 554 single nucleotide polymorphisms (SNPs) in 41 candidate gene regions proposed to be involved in lipid-related pathways potentially predisposing to incidence of MI in 2,602 participants of the Swedish Twin Register (STR; 57% women). All associations with nominal P<0.01 were further investigated in the Uppsala Longitudinal Study of Adult Men (ULSAM; N = 1,142).
  
  
  RESULTS
  In the present study, we report associations of lipid-related SNPs with incident MI in two community-based longitudinal studies with in silico replication in a meta-analysis of genome-wide association studies. Overall, there were 9 SNPs in STR with nominal P-value <0.01 that were successfully genotyped in ULSAM. rs4149313 located in ABCA1 was associated with MI incidence in both longitudinal study samples with nominal significance (hazard ratio, 1.36 and 1.40; P-value, 0.004 and 0.015 in STR and ULSAM, respectively). In silico replication supported the association of rs4149313 with coronary artery disease in an independent meta-analysis including 173,975 individuals of European descent from the CARDIoGRAMplusC4D consortium (odds ratio, 1.03; P-value, 0.048).
  
  
  CONCLUSIONS
  rs4149313 is one of the few amino acid changing variants in ABCA1 known to associate with reduced cholesterol efflux. Our results are suggestive of a weak association between this variant and the development of atherosclerosis and MI.
authors.affiliation: Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
authors.forename: Ci
authors.initials: C
authors.lastname: Song
authors.forename: Nancy L
authors.initials: NL
authors.lastname: Pedersen
authors.forename: Chandra A
authors.initials: CA
authors.lastname: Reynolds
authors.forename: Maria
authors.initials: M
authors.lastname: Sabater-Lleal
authors.forename: Stavroula
authors.initials: S
authors.lastname: Kanoni
authors.forename: Christina
authors.initials: C
authors.lastname: Willenborg
authors.forename: Ann-Christine
authors.initials: AC
authors.lastname: Syvänen
authors.forename: Hugh
authors.initials: H
authors.lastname: Watkins
authors.forename: Anders
authors.initials: A
authors.lastname: Hamsten
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Prince
authors.forename: Erik
authors.initials: E
authors.lastname: Ingelsson
mesh_terms: D064286:ATP Binding Cassette Transporter 1; D018528:ATP-Binding Cassette Transporters / Q000235:genetics*; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008055:Lipids / Q000097:blood* / Q000235:genetics*; D008137:Longitudinal Studies; D008297:Male; D009203:Myocardial Infarction / Q000097:blood* / Q000453:epidemiology / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D012307:Risk Factors; D013548:Sweden / Q000453:epidemiology
chemical_list: C577836:ABCA1 protein, human; D064286:ATP Binding Cassette Transporter 1; D018528:ATP-Binding Cassette Transporters; D008055:Lipids
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