title: [Association of matrix metalloproteinase-9 and platelet membrane glycoprotein VI polymorphisms with acute coronary syndrome].
abstract: OBJECTIVE
  To investigate serum level and gene polymorphisms of matrix metalloproteinase 9 (MMP-9), and platelet glycoprotein VI (GPVI) in patients with acute coronary syndrome (ACS).
  
  
  METHODS
  In a prospective study of 179 patients with documented ACS and 164 controls, we measured baseline serum MMP-9 levels using ELISA and determined the MMP-9/C-1562T and MMP-9/G5564A genotypes using PCR-restriction fragment length polymorphism. Fib serum level was measured by Clauss assay. We also analyzed the Fib/Bbeta-148C/T and GPVI/T13254C polymorphisms.
  
  
  RESULTS
  Serum levels of MMP-9 and Fib in ACS patients were significantly higher than in controls (P < 0.001), and serum level of Fib in the acute myocardial infarction group was higher than in patients with unstable angina (P < 0.05). No significant difference between ACS patients and controls was found in frequencies of MMP-9/C-1562T, MMP-9/G5564A, Fib/Bbeta-148C/T, and GPVI/T13254C genotypes and alleles (P > 0.05). The T allele of the Fib/Bbeta-148T polymorphism was associated with increased plasma Fib level (P < 0.05). There was a strong positive correlation between serum level of MMP-9 and Fib (r = 0.289, P < 0.01).
  
  
  CONCLUSIONS
  Serum levels of MMP-9 and Fib were independent risk factors of ACS. There was an obvious relationship between the Bbeta-148C/T mutation and high Fib level. No significant difference between controls and ACS patients was found in the frequencies of MMP-9 C-1562T and G5564A, Fib Bbeta-148C/T and GPVI T13254C genotypes and alleles (P > 0.05).
authors.affiliation: Tianjin Chest Hospital, Tianjin 300051, China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Qin
authors.forename: Bing-rang
authors.initials: BR
authors.lastname: Zhao
authors.forename: Yong-min
authors.initials: YM
authors.lastname: Mao
authors.forename: Rang-zhuang
authors.initials: RZ
authors.lastname: Cui
authors.forename: Lu
authors.initials: L
authors.lastname: Kou
authors.forename: Ying-li
authors.initials: YL
authors.lastname: Li
authors.forename: Fu-mei
authors.initials: FM
authors.lastname: Zhao
authors.forename: Ru-tai
authors.initials: RT
authors.lastname: Hui
mesh_terms: D054058:Acute Coronary Syndrome / Q000235:genetics*; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D020780:Matrix Metalloproteinase 9 / Q000097:blood / Q000235:genetics*; D008875:Middle Aged; D010980:Platelet Membrane Glycoproteins / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide
chemical_list: D010980:Platelet Membrane Glycoproteins; C098341:platelet membrane glycoprotein VI; D020780:Matrix Metalloproteinase 9