title: Bilioenterostomy enhances biliary carcinogenesis in hamsters.
abstract: The aim of this study was to examine whether the type of bilioenterostomy enhances biliary carcinogenesis in the hamster model. Syrian hamsters were divided into the following groups; simple laparotomy (control group), cholecystoduodenostomy with dissection of the extrahepatic bile duct on the distal end of the common duct (CDDB group) and cholecystoileostomy with dissection of the extrahepatic bile duct on the distal end of the common duct (CIDB group). Following these procedures, all hamsters received N-nitrosobis(2-oxopropyl)amine. The diameter of the extrahepatic bile duct and plasma levels of cholecystokinin (CCK) were measured and the number of neoplastic lesions was counted microscopically. Proliferative effect of the procedures on the biliary epithelium was examined by proliferative cell nuclear antigen. In the CDDB group the extrahepatic bile duct was significantly dilated and carcinogenesis of the gall-bladder and extrahepatic bile ducts was enhanced. In the CIDB group the CCK bioactivity was stimulated and intrahepatic biliary duct, but not gall bladder and extrahepatic bile duct, carcinogenesis was promoted more than that observed in the CDDB group. Proliferation of the biliary duct epithelium was enhanced in both the CDDB and CIDB groups. Cholecystoduodenostomy enhanced intra- and extrahepatic bile duct carcinoma, whereas cholecystoileostomy promoted only intrahepatic bile duct carcinoma. Some factors in the intestinal juice seem to play a role in the promotion of biliary tract carcinoma.
authors.affiliation: The Second Department of Surgery, Nagasaki University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ikematsu
authors.forename: T
authors.initials: T
authors.lastname: Tomioka
authors.forename: S
authors.initials: S
authors.lastname: Yamanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Tajima
authors.forename: T
authors.initials: T
authors.lastname: Tsunoda
authors.forename: T
authors.initials: T
authors.lastname: Kanematsu
mesh_terms: D000818:Animals; D001650:Bile Duct Neoplasms / Q000209:etiology; D001652:Bile Ducts / Q000601:surgery*; D017734:Bile Ducts, Extrahepatic / Q000473:pathology; D001659:Biliary Tract / Q000187:drug effects / Q000473:pathology*; D001661:Biliary Tract Neoplasms / Q000139:chemically induced / Q000209:etiology* / Q000473:pathology; D002273:Carcinogens; D002291:Carcinoma, Papillary / Q000139:chemically induced / Q000209:etiology* / Q000473:pathology; D002455:Cell Division; D002766:Cholecystokinin / Q000097:blood; D006224:Cricetinae; D004848:Epithelium / Q000473:pathology; D005260:Female; D005704:Gallbladder / Q000601:surgery*; D005706:Gallbladder Neoplasms / Q000209:etiology; D007082:Ileum / Q000601:surgery; D008647:Mesocricetus; D009602:Nitrosamines; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis
chemical_list: D002273:Carcinogens; D009602:Nitrosamines; D018809:Proliferating Cell Nuclear Antigen; C013622:nitrosobis(2-oxopropyl)amine; D002766:Cholecystokinin