title: Plasma transforming growth factor beta1, metalloproteinase-1 and tissue inhibitor of metalloproteinases-1 in acute viral hepatitis type B.
abstract: OBJECTIVE
  Antiproliferative, pro-apoptotic and immunosuppressive activity effects suggest crucial role of transforming growth factor (TGF)-beta1, metalloproteinase (MMP)-1 and its tissue inhibitor (TIMP)-1 in the pathogenesis of acute liver injury that in some patients precede development of chronic liver diseases and fibrogenesis. The aim of this study was to evaluate effect of acute HBV infection on plasma TGF-beta1, MMP-1 and TIMP-1 levels.
  
  
  METHODS
  TGF-beta1, MMP-1 and TIMP-1 plasma concentrations were measured with an enzyme immunoassay in 39 patients with acute viral hepatitis type B. Baseline measurement was performed within the first week of jaundice and then weekly up to the fourth week of the disease. Results were compared to baseline and normal values and to liver function tests.
  
  
  RESULTS
  Plasma concentrations of TGF-beta1, TIMP-1 and MMP-1 were significantly elevated in the first week of acute viral B hepatitis in comparison to normal. Analysis of individual values demonstrated significant positive correlation between plasma concentrations of TGF-beta1 and TIMP-1. There was no correlation between MMP-1 and TGF-beta1 or TIMP-1. Significant correlation was demonstrated between both TGF-beta1 and ALT or AST as well as between TIMP-1 and ALT, AST or bilirubin. Elevated baseline levels of both TGF-beta1 and TIMP-1 decreased gradually in consecutive weeks of the disease. TGF-beta1 but not TIMP-1 plasma concentrations were significantly lower in 3rd and 4th week than baseline values. MMP-1 concentration remained on baseline level in the 2nd week of the disease. However in the 3rd week its values increased suddenly but the significant difference in comparison to baseline was observed only in 4th week.
  
  
  CONCLUSIONS
  These results indicate important role of TGF-beta1, TIMP-1 and MMP-1 in acute viral hepatitis, that seems to be connected first of all with hepatocytes damage. Their role in extracellular matrix metabolism during acute liver injury needs further evaluation.
authors.affiliation: Department of Infectious Diseases, Medical University of Bialystok, 15-540 Bialystok, Zurawia str., 14, Poland. flisiakr@priv.onet.pl
authors.forename: Robert
authors.initials: R
authors.lastname: Flisiak
authors.forename: Jerzy
authors.initials: J
authors.lastname: Jaroszewicz
authors.forename: Tadeusz W
authors.initials: TW
authors.lastname: Lapiński
authors.forename: Iwona
authors.initials: I
authors.lastname: Flisiak
authors.forename: Magdalena
authors.initials: M
authors.lastname: Rogalska
authors.forename: Danuta
authors.initials: D
authors.lastname: Prokopowicz
mesh_terms: D000328:Adult; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006509:Hepatitis B / Q000097:blood*; D022781:Hepatocytes / Q000473:pathology; D006801:Humans; D008297:Male; D020781:Matrix Metalloproteinase 1 / Q000097:blood*; D013223:Statistics as Topic; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000097:blood*; D016212:Transforming Growth Factor beta / Q000097:blood*; D053773:Transforming Growth Factor beta1
chemical_list: C508960:TGFB1 protein, human; D019715:Tissue Inhibitor of Metalloproteinase-1; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; D020781:Matrix Metalloproteinase 1