title: Biliary lipid output in the early stage of acute liver failure induced by 90% hepatectomy in the rat.
abstract: BACKGROUND
  Differences in biliary lipid output were compared in rats after 70% or 90% hepatectomy (Hx) to evaluate a possible index of the early stage of acute liver failure.
  
  
  METHODS
  Male Sprague-Dawley (SD) rats weighing 300 to 350 g were randomly divided into two groups for 70% Hx or 90% Hx, and animals were sacrificed at 0, 6, 24, and 48 h after Hx. Before sacrifice, a polyethylene tube was cannulated into the bile duct and bile was collected for 1 h. Outputs of total bile acids, phospholipid, and total cholesterol in serum and bile were determined. Biliary total cholesterol, bile acid concentrations, and bile acid component levels were determined using gas liquid chromatography. Hepatic microsomal cholesterol 7alpha-hydroxylase and sterol 12alpha-hydroxylase activities were also determined using high performance liquid chromatography.
  
  
  RESULTS
  The 3-day survival rate after 90% Hx was 50%. In the 90% Hx group, the serum total bile acid concentration at each point was significantly higher than it was in the 70% Hx group. The bile flow rate and biliary outputs of cholesterol, phospholipid, and bile acids were significantly lower at 6 h after 90% Hx than after 70% Hx. Among bile acid species, cholic and chenodeoxycholic acid outputs into bile were significantly less at 6 h after 90% Hx. The activities of cholesterol 7alpha-hydroxylase and sterol 12alpha-hydroxylase were decreased after 90% Hx.
  
  
  CONCLUSIONS
  Our results suggest that determinations of the bile flow rate and biliary lipid outputs are supposed to be useful for early detection of hepatic failure after extensive hepatectomy.
authors.affiliation: Department of Surgery I, Miyazaki University School of Medicine, Miyazaki, Japan.
authors.forename: Shun-ichi
authors.initials: S
authors.lastname: Tanaka
authors.forename: Kazuo
authors.initials: K
authors.lastname: Chijiiwa
authors.forename: Yorio
authors.initials: Y
authors.lastname: Maeda
mesh_terms: D000818:Animals; D001646:Bile / Q000378:metabolism*; D001647:Bile Acids and Salts / Q000032:analysis; D001835:Body Weight; D002790:Cholesterol 7-alpha-Hydroxylase / Q000378:metabolism; D006498:Hepatectomy / Q000401:mortality; D050356:Lipid Metabolism; D008055:Lipids / Q000097:blood; D017114:Liver Failure, Acute / Q000378:metabolism*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013253:Steroid 12-alpha-Hydroxylase / Q000378:metabolism; D015996:Survival Rate
chemical_list: D001647:Bile Acids and Salts; D008055:Lipids; D002790:Cholesterol 7-alpha-Hydroxylase; D013253:Steroid 12-alpha-Hydroxylase