title: Polymorphisms of matrix metalloproteinases in myocardial infarction: a meta-analysis.
abstract: BACKGROUND
  The literature provides no clear answer as to whether matrix metalloproteinases (MMPs) polymorphisms increases risk of myocardial infarction (MI).
  
  
  OBJECTIVE
  Our purpose was to help clarify the inconsistent findings of MMPs polymorphisms and MI susceptibility and identify which MMP polymorphism might play an active role in the occurrence of MI.
  
  
  METHODS
  Articles were identified by a Medline search and citation tracking.
  
  
  METHODS
  Eligible articles were case-control studies of MMPs polymorphisms and MI which met our prespecified criteria.
  
  
  METHODS
  Data were independently extracted by two authors according to a predefined protocol. Incongruities were settled by consensus decision.
  
  
  CONCLUSIONS
  18 potentially eligible articles were identified. In a combined analysis, the 5A allele of the MMP-3 5A/6A polymorphism was associated with MI (OR 1.21, 95% CI 1.01 to 1.46, p=0.04), suggesting its role in plaque rupture. In the subgroup analysis by ethnicity, significantly increased risk was found among East Asians (OR 1.39, 95% CI 1.01 to 1.91, p=0.04), whereas no significant association was detected in Caucasian populations. In addition, there were significant associations of the MMP-9 -1562C→T polymorphism with MI (OR 1.14, 95% CI 1.02 to 1.27, p=0.02), whereas the heterogeneity of the studies showed no significance (I(2)=13.7%, p=0.32). This meta-analysis demonstrated that the MMP-3 5A/6A and MMP-9 -1562 C→T polymorphisms are risk factors associated with increased MI susceptibility, but these associations vary in different ethnic populations.
authors: Department of Gerontology, the first affiliated hospital of Nanjing Medical University, Nanjing 210029, PRC, China.
authors: Junhong
authors: J
authors: Wang
authors: Di
authors: D
authors: Xu
authors: Xin
authors: X
authors: Wu
authors: Chuanwei
authors: C
authors: Zhou
authors: Hui
authors: H
authors: Wang
authors: Yan
authors: Y
authors: Guo
authors: Kejiang
authors: K
authors: Cao
mesh_terms: D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006801:Humans; D016015:Logistic Models; D019278:Matrix Metalloproteinase 3 / Q000235:genetics; D020780:Matrix Metalloproteinase 9 / Q000235:genetics; D053505:Matrix Metalloproteinases, Secreted / Q000235:genetics*; D009203:Myocardial Infarction / Q000201:enzymology / Q000208:ethnology / Q000235:genetics*; D009206:Myocardium / Q000201:enzymology*; D016017:Odds Ratio; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D044469:Racial Groups / Q000235:genetics; D018570:Risk Assessment; D012307:Risk Factors
chemical_list: D053505:Matrix Metalloproteinases, Secreted; C511768:MMP3 protein, human; D019278:Matrix Metalloproteinase 3; D020780:Matrix Metalloproteinase 9