title: Characterization and genetic analysis in the newly established human bile duct cancer cell lines.
abstract: Bile duct carcinoma patients generally have a poor prognosis. Understanding this cancer at the biological, genetic, molecular, and cellular level in ways relevant to clinical management is essential for developing effective preventive and therapeutic regimens. However, the currently established bile duct cancer cell lines are still insufficient for the research required to attain such an improved understanding. The aim of this study was to establish and characterize human bile duct cancer cell lines. We examined the growth characteristics and colony-forming ability of the established cell lines in terms of their cell cycle parameters and expression of tumor markers (CEA, CA19-9, MUC-1 and c-kit) and oncogene (c-erbB2) by flow cytometry. Comparative genomic hybridization (CGH) was performed to detect changes in the gene copy numbers. Human origin of the cell lines was confirmed by chromosomal analysis. We have established 3 cell lines and designated them as TGBC-47, TGBC-51, and TBCN-6 and the population doubling times of the three cell lines were 28, 38 and 94 h, respectively. The cells maintained differentiation characteristics of the original tumors. Two cell lines formed colonies in the colony forming assays; all three-cell lines expressed CEA, CA19-9, MUC-1 and c-erbB2 and showed chromosomal aneuploidy. CGH analysis demonstrated gains in various chromosomal regions, including 1q, 5p, 6p, 7q and 8q in two cell lines, and the loss in 17p in three cell lines. These newly established cell lines might serve as useful models for studying the advanced molecular tumor biology of bile duct cancer. Furthermore, they may assist translational research in the development of new effective molecular targeting chemoradiotherapy regimens. These chromosomal aberrations and imbalances provide some starting points for the molecular analysis of genomic regions and genes involved in bile duct carcinogenesis.
authors.affiliation: Department of Surgery, Institute of Clinical Medicine, University of Tsukuba, Tsukuba-Shi 305-8575, Japan.
authors.forename: Mila
authors.initials: M
authors.lastname: Ghosh
authors.forename: Naoto
authors.initials: N
authors.lastname: Koike
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Tsunoda
authors.forename: Takashi
authors.initials: T
authors.lastname: Hirano
authors.forename: Sunil
authors.initials: S
authors.lastname: Kaul
authors.forename: Hironobu
authors.initials: H
authors.lastname: Kashiwagi
authors.forename: Toru
authors.initials: T
authors.lastname: Kawamoto
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Ohkohchi
authors.forename: Kaoru
authors.initials: K
authors.lastname: Saijo
authors.forename: Tadao
authors.initials: T
authors.lastname: Ohno
authors.forename: Masanao
authors.initials: M
authors.lastname: Miwa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Todoroki
mesh_terms: D001650:Bile Duct Neoplasms / Q000235:genetics* / Q000378:metabolism; D018395:CA-19-9 Antigen / Q000096:biosynthesis; D002272:Carcinoembryonic Antigen / Q000096:biosynthesis; D002453:Cell Cycle; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D002469:Cell Separation; D002875:Chromosomes / Q000648:ultrastructure; D005434:Flow Cytometry; D006801:Humans; D007621:Karyotyping; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D018396:Mucin-1 / Q000096:biosynthesis; D009693:Nucleic Acid Hybridization; D011379:Prognosis; D011863:Radioimmunoassay; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000096:biosynthesis; D013997:Time Factors
chemical_list: D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen; D018396:Mucin-1; D018719:Erb-b2 Receptor Tyrosine Kinases