title: [Immune complex induced rat liver fibrosis model by intraperitoneal injection of human serum albumin].
abstract: BACKGROUND
  To establish an immune complex induced rat liver fibrosis model by intraperitoneal injection of human serum albumin (HSA).
  
  
  METHODS
  Male Wistar rats, weighting 110-120 g, were sensitized with HSA by subcutaneous injections at different sites for 4 shots at intervals of 14, 10 and 10 days. Ten days after the fourth injection, the peritoneal booster dose of HSA was administrated to rats twice weekly for 8 weeks with an initial dose of 5 mg, and progressive increase to 20 mg. Liver biopsy was performed at the beginning of HSA booster, 15, 30, 60 days after HSA booster, and 30, 60, 90, 120 days after discontinuation of HSA booster, respectively. Liver samples were examined for histological changes and liver hydroxyproline (HyP) was measured by biochemical method. Fibrosis serum markers hyaluronate acid (HA) and laminin (LN) were determined by RIA method.
  
  
  RESULTS
  After intraperitoneal administration of HSA, the degree of liver pathological changes, the liver Hyp content and serum HA and LN increased (P<0.05). The longer the HSA administrated, the higher the liver pathological change degree (P<0.05) and the levels of liver Hyp and serum HA (P<0.01). After discontinuation of HSA, the levels of serum HA and liver Hyp decreased significantly (P<0.01) but were still significantly higher than those in the controls (P<0.01). The liver fibrosis formation rate was 100% and the fibrosis lasted more than 120 days.
  
  
  CONCLUSIONS
  Intraperitoneal administration of HSA to make rat immune complex induced liver fibrosis model is convenient with high liver fibrosis formation rate and long fibrosis lasting time. The model may be used to evaluate the therapeutic effect of antifibrotic drugs.
authors.affiliation: Liver Research Center, Beijing Friendship Hospital, Capital University of Medical Sciences, Beijing 100050, China.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Dong
authors.forename: Jin
authors.initials: J
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Shen
authors.forename: Hong
authors.initials: H
authors.lastname: Ma
authors.forename: Ji-Dong
authors.initials: JD
authors.lastname: Jia
mesh_terms: D000818:Animals; D000936:Antigen-Antibody Complex / Q000008:administration & dosage / Q000633:toxicity*; D004195:Disease Models, Animal; D005355:Fibrosis; D006801:Humans; D006820:Hyaluronic Acid / Q000378:metabolism; D006909:Hydroxyproline / Q000378:metabolism; D007274:Injections, Intraperitoneal; D007797:Laminin / Q000378:metabolism; D008099:Liver / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D008106:Liver Cirrhosis, Experimental / Q000139:chemically induced / Q000378:metabolism / Q000473:pathology*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012709:Serum Albumin / Q000008:administration & dosage / Q000633:toxicity*
chemical_list: D000936:Antigen-Antibody Complex; D007797:Laminin; D012709:Serum Albumin; D006820:Hyaluronic Acid; D006909:Hydroxyproline