title: Matrix metalloproteinase-13 and membrane type-1 matrix metalloproteinase in peritoneal fluid of women with endometriosis.
abstract: OBJECTIVE
  It is becoming more and more evident that different types of matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) are involved in the pathogenesis of endometriosis. The aim of the present study was to measure levels of the active forms of MMP-13 and membrane type-1 matrix metalloproteinase (MT1-MMP)/MMP-14 as well as TIMP-2 in the peritoneal fluid of women with endometriosis.
  
  
  METHODS
  We determined the levels of the active forms MMP-13 and MT1-MMP/MMP-14 as well as TIMP-2 in the peritoneal fluid of 20 women with endometriosis and 18 controls by different types of enzyme-linked immunosorbent assay.
  
  
  RESULTS
  We found that the concentrations (mean +/- standard deviation) of total active MMP-13 and endogenous active MT1-MMP/MMP-14 in the peritoneal fluid of patients with endometriosis were 1.69 +/- 0.67 and 3.12 +/- 1.07 ng/ml, respectively. In control women the corresponding values were 3.02 +/- 0.43 and 4.45 +/- 1.03 ng/ml. The differences were statistically significant (p < 0.0001 and p < 0.0004 for MMP-13 and MMP-14, respectively). Levels of TIMP-2 did not differ significantly.
  
  
  CONCLUSIONS
  Decreased concentrations of active MMP-13 and MT1-MMP/MMP-14 may imply that the proteolytic activity of the peritoneal milieu of women with endometriosis is disturbed, which may have implications in the pathogenesis of the disease.
authors.affiliation: Department of Pathophysiology of Pregnancy, Medical University of Białystok, ul. Marii Sklodowskiej-Curie 24 A, 15-276 Białystok, Poland. plauda@cksr.ac.bialystok.pl
authors.forename: Piotr
authors.initials: P
authors.lastname: Laudanski
authors.forename: Jacek
authors.initials: J
authors.lastname: Szamatowicz
authors.forename: Przymyslaw
authors.initials: P
authors.lastname: Ramel
mesh_terms: D000328:Adult; D001202:Ascitic Fluid / Q000378:metabolism*; D017364:Collagenases / Q000378:metabolism*; D004715:Endometriosis / Q000378:metabolism*; D005260:Female; D006801:Humans; D007246:Infertility / Q000378:metabolism; D053509:Matrix Metalloproteinase 13; D020782:Matrix Metalloproteinases / Q000378:metabolism*; D053504:Matrix Metalloproteinases, Membrane-Associated; D019716:Tissue Inhibitor of Metalloproteinase-2 / Q000378:metabolism*
chemical_list: D019716:Tissue Inhibitor of Metalloproteinase-2; D017364:Collagenases; C507079:MMP13 protein, human; D053509:Matrix Metalloproteinase 13; D020782:Matrix Metalloproteinases; D053504:Matrix Metalloproteinases, Membrane-Associated