title: No association of interleukin-6 gene polymorphism (-174 G/C) with premature coronary artery disease in a Turkish cohort.
abstract: OBJECTIVE
  Interleukin-6 (IL-6) may contribute to the inflammatory response by activating endothelial cells and stimulating the synthesis of fibrinogen. It might thus be important in the pathogenesis of inflammation associated with coronary artery disease (CAD). Several studies suggested that the -174 C allele was associated with an increased prevalence of coronary heart disease. The aim of this study was to investigate further the association of the IL-6 -174 G/C allele status with premature CAD.
  
  
  METHODS
  A total of 120 patients and 105 controls were included in the study. The IL-6 -174 G/C polymorphism was genotyped using PCR-restriction fragment length polymorphism.
  
  
  RESULTS
  The genotype distribution of the -174 G/C polymorphism was not different in premature CAD patients (GG: 53%; GC: 42.6%; CC: 4.3%) and controls (GG: 54.3%; GC: 39%; CC: 6.7%) (P=0.72). The prevalence of the C allele was 25.6% in patients and 26.1% in controls. By multiple regression analysis, family history, smoking, diabetes, and hypertension were independent risk factors of premature CAD, but not IL-6 genotype.
  
  
  CONCLUSIONS
  We conclude that the IL-6 -174 G/C polymorphism is not associated with the risk of premature CAD, and does not contribute to cardiovascular risk stratification.
authors.affiliation: Department of Cardiology, Kent Hospital, Izmir, Turkey.
authors.forename: Cevad
authors.initials: C
authors.lastname: Sekuri
authors.forename: Fethi Sirri
authors.initials: FS
authors.lastname: Cam
authors.forename: Abdi
authors.initials: A
authors.lastname: Sagcan
authors.forename: Ertugrul
authors.initials: E
authors.lastname: Ercan
authors.forename: Istemihan
authors.initials: I
authors.lastname: Tengiz
authors.forename: Emin
authors.initials: E
authors.lastname: Alioglu
authors.forename: Afig
authors.initials: A
authors.lastname: Berdeli
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D003327:Coronary Disease / Q000097:blood / Q000453:epidemiology / Q000235:genetics*; D004247:DNA / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D015850:Interleukin-6 / Q000097:blood / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D015995:Prevalence; D011379:Prognosis; D012307:Risk Factors; D014421:Turkey / Q000453:epidemiology
chemical_list: D015850:Interleukin-6; D004247:DNA