title: Association study of the thrombomodulin -33G>A polymorphism with coronary artery disease and myocardial infarction in Chinese Han population.
abstract: BACKGROUND
  Thrombomodulin (TM) is the anticoagulant endothelial cell membrane-bound protein cofactor in the thrombin-mediated activation of protein C. Recently, conflicting data have been reported regarding the possible contribution of the TM -33G>A polymorphism to coronary artery disease (CAD) or myocardial infarction (MI) in some Asian populations. We investigated this polymorphism in northern Han Chinese.
  
  
  METHODS
  We performed a case-control study, including 808 patients with angiographically verified CAD or a history of an acute MI and 813 age- and sex-matched controls. The TM -33G>A polymorphism was determined by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) analysis.
  
  
  RESULTS
  We did not find a significant difference in the frequency of the A allele between CAD patients (11%) and controls (9.8%; P=0.249), between MI patients (11.5%) and controls (P=0.163), or between premature MI patients (11.7%) and controls (P=0.265). Similarly, the difference of the genotypic distributions could be neglected across the groups: GG: (GA/AA) was 81.4%:18.6% in controls, 79.7%:20.3% in patients with CAD, 78.8%:21.2% in patients with MI, and 77.7%:22.3% in patients with premature MI, respectively (vs. controls, all P>0.05). The lack of association also persisted after adjusting for other conventional risk factors.
  
  
  CONCLUSIONS
  Our results seemed not to support a significant association of the TM -33G>A polymorphism with CAD, MI or premature MI in our population.
authors.affiliation: Division of Population Genetics, Cardiovascular Institute and Fu Wai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beilishi Road 167, Beijing 100037, China.
authors.forename: Jiangong
authors.initials: J
authors.lastname: Zhao
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Zhou
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Huang
authors.forename: Jianhong
authors.initials: J
authors.lastname: Chen
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Gu
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics*; D016022:Case-Control Studies; D002681:China; D003327:Coronary Disease / Q000208:ethnology / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000208:ethnology / Q000235:genetics*; D011110:Polymorphism, Genetic; D018180:Thrombomodulin / Q000235:genetics*
chemical_list: D018180:Thrombomodulin