title: Fcgamma receptor IIIA polymorphism as a risk-factor for coronary artery disease.
abstract: BACKGROUND
  Inflammation is important in the pathogenesis of atherosclerosis. Polymorphisms of Fc receptors for IgG (FcgammaR) are associated with modifying effects of several infectious and autoimmune diseases. We have assessed the relationship between polymorphisms in three different FcgammaR genes and coronary artery disease (CAD).
  
  
  RESULTS
  We genotyped for the FcgammaRIIA-R/H131, the FcgammaRIIIB-Na1/Na2, and the FcgammaRIIIA-F/V158 polymorphisms in 882 patients undergoing diagnostic coronary angiography. Significant CAD was defined as >/=50% lumen diameter stenosis in at least one coronary artery. In the analysis, no association was found between the FcgammaRIIA and FcgammaRIIIB genotypes and CAD, whereas the FcgammaRIIIA genotype was strongly related. Compared to those being heterozygous, or homozygous for the F allele, patients homozygous for the V allele had significantly reduced risk: OR, 0.53; (CI, 0.32-0.90). Additional adjustment for classical risk factors and sedimentation rate did not affect the results. The V/V genotype was also inversely related to the extent of CAD defined as no CAD, single, double or triple vessel disease (P trend=0.002).
  
  
  CONCLUSIONS
  Our data provide evidence for an association between FcgammaRIIIA allelic variants and coronary atherosclerosis. Genetic variation in this IgG-receptor may influence the clearance of antibodies by monocyte-derived macrophages involved in the pathogenesis of CAD.
authors.affiliation: Department of Clinical Medicine, Section for Neurology, University of Bergen and Haukeland University Hospital, N-5021 Bergen, Norway. sonja.gavasso@helse-bergen.no
authors.forename: Sonia
authors.initials: S
authors.lastname: Gavasso
authors.forename: Ottar
authors.initials: O
authors.lastname: Nygård
authors.forename: Eva Ringdal
authors.initials: ER
authors.lastname: Pedersen
authors.forename: Jan H
authors.initials: JH
authors.lastname: Aarseth
authors.forename: Oyvind
authors.initials: O
authors.lastname: Bleie
authors.forename: Kjell-Morten
authors.initials: KM
authors.lastname: Myhr
authors.forename: Christian A
authors.initials: CA
authors.lastname: Vedeler
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003324:Coronary Artery Disease / Q000235:genetics* / Q000503:physiopathology*; D005260:Female; D005838:Genotype; D006801:Humans; D007249:Inflammation; D008264:Macrophages / Q000502:physiology; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D017452:Receptors, IgG / Q000235:genetics*; D012307:Risk Factors
chemical_list: C496124:FCGR3A protein, human; D017452:Receptors, IgG