title: Establishment and characterization of a thymidine kinase deficient avian fibroblast cell line derived from a Japanese quail cell line, QT35.
abstract: An avian thymidine kinase deficient (TK-) fibroblast cell line (QTTK-) was established from a Japanese quail cell line, QT35, and characterized the biological properties. QTTK- could grow in the presence of 5-bromo-2'-deoxyuridine (BUdR, 100 micrograms/ml) and not in the growth medium with hypoxanthine-aminopterin-thymidine. Compared to QT35 cells, the 3H-thymidine incorporation of the QTTK- cells and the TK activity of the cell extract significantly decreased to 0.3% and 0.5%, respectively. In the thymidylate synthetase activity, the karyotype, and the sensitivities to either fowlpox virus (FPV) or herpesvirus of turkeys (HVT), OTTK- cells were similar to the parental QT35 cells. Since QTTK- cells were permissive to FPV and HVT infections and these viruses could not grow in the presence of 50 to 75 micrograms/ml of BUdR, QTTK- cells may be useful for the construction of recombinant FPV and HVT that have foreign genes within the TK gene of the virus genome.
authors.affiliation: Department of Epizootiology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Niikura
authors.forename: T
authors.initials: T
authors.lastname: Narita
authors.forename: T
authors.initials: T
authors.lastname: Mikami
mesh_terms: D000630:Aminopterin / Q000494:pharmacology; D000818:Animals; D001973:Bromodeoxyuridine / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D002999:Clone Cells; D003370:Coturnix; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects / Q000201:enzymology*; D005467:Floxuridine / Q000494:pharmacology; D019271:Hypoxanthine; D007042:Hypoxanthines / Q000494:pharmacology; D007621:Karyotyping; D013936:Thymidine / Q000494:pharmacology; D013937:Thymidine Kinase
chemical_list: D007042:Hypoxanthines; D005467:Floxuridine; D019271:Hypoxanthine; D013937:Thymidine Kinase; D001973:Bromodeoxyuridine; D000630:Aminopterin; D013936:Thymidine