title: Increase of glycosaminoglycans and metalloproteinases 2 and 9 in liver extracellular matrix on early stages of extrahepatic cholestasis.
abstract: BACKGROUND
  Cholestasis produces hepatocellular injury, leukocyte infiltration, ductular cells proliferation and fibrosis of liver parenchyma by extracellular matrix replacement.
  
  
  OBJECTIVE
  Analyze bile duct ligation effect upon glycosaminoglycans content and matrix metalloproteinase (MMPs) activities.
  
  
  METHODS
  Animals (6-8 weeks; n = 40) were euthanized 2, 7 or 14 days after bile duct ligation or Sham-surgery. Disease evolution was analyzed by body and liver weight, seric direct bilirubin, globulins, gamma glutamyl transpeptidase (GGT), alkaline phosphatase (Alk-P), alanine and aspartate aminotransferases (ALT and AST), tissue myeloperoxidase and MMP-9, pro MMP-2 and MMP-2 activities, histopathology and glycosaminoglycans content.
  
  
  RESULTS
  Cholestasis caused cellular damage with elevation of globulins, GGT, Alk-P, ALT, AST. There was neutrophil infiltration observed by the increasing of myeloperoxidase activity on 7 (P = 0.0064) and 14 (P = 0.0002) groups which leads to the magnification of tissue injuries. Bile duct ligation increased pro-MMP-2 (P = 0.0667), MMP-2 (P = 0.0003) and MMP-9 (P<0.0001) activities on 14 days indicating matrix remodeling and establishment of inflammatory process. Bile duct ligation animals showed an increasing on dermatan sulfate and/or heparan sulfate content reflecting extracellular matrix production and growing mitosis due to parenchyma depletion.
  
  
  CONCLUSIONS
  Cholestasis led to many changes on rats' liver parenchyma, as so as on its extracellular matrix, with major alterations on MMPs activities and glycosaminoglycans content.
authors.affiliation: Departamento de Bioquímica, Universidade Federal de Juiz de Fora - UFJF, Juiz de Fora, MG, Brasil.
authors.forename: Pedro Luiz Rodrigues
authors.initials: PL
authors.lastname: Guedes
authors.affiliation: Departamento de Morfologia, Universidade Federal de Juiz de Fora - UFJF, Juiz de Fora, MG, Brasil.
authors.forename: Maria Christina Marques Nogueira
authors.initials: MC
authors.lastname: Castañon
authors.affiliation: Departamento de Biociências, Universidade Federal de São Paulo - UNIFESP, Santos, SP, Brasil.
authors.forename: Márcia Regina
authors.initials: MR
authors.lastname: Nagaoka
authors.affiliation: Departamento de Bioquímica, Universidade Federal de Juiz de Fora - UFJF, Juiz de Fora, MG, Brasil.
authors.forename: Jair Adriano Kopke de
authors.initials: JA
authors.lastname: Aguiar
mesh_terms: D000818:Animals; D001651:Cholestasis, Extrahepatic / Q000378:metabolism*; D005109:Extracellular Matrix / Q000737:chemistry*; D006025:Glycosaminoglycans / Q000032:analysis / Q000378:metabolism*; D008297:Male; D045726:Metalloproteases / Q000032:analysis / Q000378:metabolism*; D017208:Rats, Wistar
chemical_list: D006025:Glycosaminoglycans; D045726:Metalloproteases