title: The profile of circulating metalloproteinases after PCI in patients with acute myocardial infarction or stable angina.
abstract: The objective of this study was to investigate the time profiles of plasma matrix metalloproteinase-9 (MMP-9), tissue inhibitor of metalloproteinases (TIMP-1 and -2), and pregnancy associated plasma protein A (PAPP-A) in patients with acute myocardial infarction (AMI), compared to patients with stable angina pectoris (AP), all treated with percutaneous coronary intervention (PCI) with stent.
  
  
  METHODS
  Twenty patients with ST-elevation AMI and 10 patients with AP were included. Serum levels of the selected markers were measured before (only in the AP group) PCI, and 3 and 12 hours, 1,3,5,7 and 14 days after PCI in all patients.
  
  
  RESULTS
  The levels of MMP-9 and MMP-9/TIMP-1 ratio, being higher in the AMI group compared to the AP group at 3 hours, were significantly reduced 1 day after PCI (p<0.01 for both), sustaining during the study period. A similar pattern was observed in PAPP-A levels with significant reduction after 12 hours (p<0.01). In the AP group only smaller changes were observed, except from an increase in PAPP-A levels from before PCI to 3 hours (p<0.001), followed by significant reduction. No significant correlations were found between any of the measured biomarkers and the infarct size, either evaluated in the acute phase or after 6 weeks.
  
  
  CONCLUSIONS
  AMI patients treated with PCI had an early significant reduction in MMP-9, MMP-9/TIMP-1 ratio and PAPP-A when compared to patients with stable angina pectoris treated with PCI. This indicates that the metalloproteinases may be involved in the early phase of the plaque rupture process, with limited influence of the PCI procedure.
authors.affiliation: Center for Clinical Heart Research, Ullevaal University Hospital, University of Oslo, Norway.
authors.forename: Eline B
authors.initials: EB
authors.lastname: Furenes
authors.forename: Harald
authors.initials: H
authors.lastname: Arnesen
authors.forename: Svein
authors.initials: S
authors.lastname: Solheim
authors.forename: Haakon K
authors.initials: HK
authors.lastname: Grøgaard
authors.forename: Pavel
authors.initials: P
authors.lastname: Hoffmann
authors.forename: Ingebjørg
authors.initials: I
authors.lastname: Seljeflot
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000097:blood / Q000201:enzymology*; D015906:Angioplasty, Balloon, Coronary; D005260:Female; D006801:Humans; D008297:Male; D020780:Matrix Metalloproteinase 9 / Q000097:blood*; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood / Q000201:enzymology*; D011247:Pregnancy; D011266:Pregnancy-Associated Plasma Protein-A / Q000378:metabolism; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000097:blood; D019716:Tissue Inhibitor of Metalloproteinase-2 / Q000097:blood
chemical_list: D019715:Tissue Inhibitor of Metalloproteinase-1; D019716:Tissue Inhibitor of Metalloproteinase-2; D011266:Pregnancy-Associated Plasma Protein-A; D020780:Matrix Metalloproteinase 9