title: Increased telomerase activity in intrahepatic cholangiocellular carcinomas induced by N-nitrosobis(2-oxopropyl)amine in hamsters.
abstract: Telomerase activities in intrahepatic cholangiocarcinomas induced by N-nitrosobis(2-oxopropyl)amine (BOP) in female hamsters were determined using a telomeric repeat amplification protocol (TRAP) assay followed by densitometric quantification. Each determination was repeated to confirm the results and telomerase activity was also detected by gel electrophoresis. An increase was evident in all of 10 cholangiocarcinomas examined, with levels ranging from 2.48 to 4.40 times the normal liver value by densitometric quantification. This finding of a consistent increase suggests that telomerase activation is involved in the development of intrahepatic cholangiocarcinomas and immortalization of cancer cells.
authors.affiliation: Department of Oncological Pathology, Cancer Center, Nara Medical University, Kashihara, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Iki
authors.forename: T
authors.initials: T
authors.lastname: Tsujiuchi
authors.forename: T
authors.initials: T
authors.lastname: Majima
authors.forename: H
authors.initials: H
authors.lastname: Sakitani
authors.forename: M
authors.initials: M
authors.lastname: Tsutsumi
authors.forename: M
authors.initials: M
authors.lastname: Takahama
authors.forename: M
authors.initials: M
authors.lastname: Yoshimoto
authors.forename: D
authors.initials: D
authors.lastname: Nakae
authors.forename: T
authors.initials: T
authors.lastname: Tsunoda
authors.forename: Y
authors.initials: Y
authors.lastname: Konishi
mesh_terms: D000230:Adenocarcinoma / Q000378:metabolism; D000818:Animals; D001650:Bile Duct Neoplasms / Q000139:chemically induced / Q000201:enzymology*; D001653:Bile Ducts, Intrahepatic; D002273:Carcinogens; D018281:Cholangiocarcinoma / Q000139:chemically induced / Q000201:enzymology*; D006224:Cricetinae; D003412:Cricetulus; D005260:Female; D009602:Nitrosamines; D019098:Telomerase / Q000378:metabolism*
chemical_list: D002273:Carcinogens; D009602:Nitrosamines; C013622:nitrosobis(2-oxopropyl)amine; D019098:Telomerase