title: Time-dependent changes in the plasma concentration of matrix metalloproteinase 9 after acute myocardial infarction.
abstract: Matrix metalloproteinase (MMP)-2 and MMP-9 are believed to play a pathophysiologic role in acute myocardial infarction (MI). The time course of their plasma concentrations in correlation with the extent of myocardial damage is unclear. In a prospective study, 20 patients with proven acute MI underwent successful reperfusion within 6 h after the onset of symptoms. The patients were divided into two groups according to the size of their MI, i.e. large or moderate MI. Plasma concentrations of MMP-2, MMP-9 and tissue inhibitor of metalloproteinase (TIMP)-1 were determined on admission, and after 24 h, 48 h, 1 week, 4 weeks, 3 months and 6 months. MMP-2 levels remained unchanged over time in both groups. The plasma concentration of MMP-9 was elevated on admission in patients with large MI versus moderate MI (195 +/- 190 versus 78 +/- 63 ng/ml, p < 0.01) as determined by left ventriculography, and returned to baseline (18 +/- 16 ng/ml) by 1 week after MI. TIMP-1 levels rose slowly in patients with large MI and returned to baseline at 6 months. The ratio of MMP-9 to TIMP-1 was significantly increased on admission in both groups and returned to baseline at 48 h. These data suggest that MMP-9 might play a pathophysiologic role during the early phase of acute MI.
authors.affiliation: 1st Department of Medicine (Cardiology, Angiology and Pulmonology), University Hospital of Mannheim, Mannheim, Germany. jens.kaden@med.ma-uni-heidelberg.de
authors.forename: Jens J
authors.initials: JJ
authors.lastname: Kaden
authors.forename: Carl-Erik
authors.initials: CE
authors.lastname: Dempfle
authors.forename: Tim
authors.initials: T
authors.lastname: Sueselbeck
authors.forename: Martina
authors.initials: M
authors.lastname: Brueckmann
authors.forename: Tudor C
authors.initials: TC
authors.lastname: Poerner
authors.forename: Dariusch
authors.initials: D
authors.lastname: Haghi
authors.forename: Karl K
authors.initials: KK
authors.lastname: Haase
authors.forename: Martin
authors.initials: M
authors.lastname: Borggrefe
mesh_terms: D015906:Angioplasty, Balloon, Coronary / Q000379:methods; D015415:Biomarkers / Q000097:blood; D004562:Electrocardiography; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D008297:Male; D020778:Matrix Metalloproteinase 2 / Q000097:blood*; D020780:Matrix Metalloproteinase 9 / Q000097:blood*; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood / Q000175:diagnosis* / Q000628:therapy; D011336:Probability; D011379:Prognosis; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D015415:Biomarkers; D020778:Matrix Metalloproteinase 2; D020780:Matrix Metalloproteinase 9