title: Measurement of in vivo HGPRT-deficient mutant cell frequency using a modified method for cloning human peripheral blood T-lymphocytes.
abstract: Approximately 80% of human peripheral blood T-lymphocytes could be cloned in the presence of crude interleukin-2, phytohemagglutinin, and X-irradiated autologous lymphocytes and Raji B-cells. This modified cloning method was used to measure the in vivo frequency of HGPRT-deficient mutant T-lymphocytes. Repeated experiments using blood from the same individuals revealed that the frequency of mutant cells was almost constant for each individual even though the cloning efficiency of lymphocytes varied somewhat from experiment to experiment. Approximately 80% of both wild-type unselected and 6-thioguanine-resistant colonies had helper/inducer and about 20% had suppressor/cytotoxic T-lymphocyte markers. No difference was observed in the distribution of lymphocyte subsets in relation to colony type.
authors.affiliation: Department of Radiobiology, Radiation Effects Research Foundation, Hiroshima, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hakoda
authors.forename: M
authors.initials: M
authors.lastname: Akiyama
authors.forename: S
authors.initials: S
authors.lastname: Kyoizumi
authors.forename: K
authors.initials: K
authors.lastname: Kobuke
authors.forename: A A
authors.initials: AA
authors.lastname: Awa
authors.forename: M
authors.initials: M
authors.lastname: Yamakido
mesh_terms: D002460:Cell Line; D002478:Cells, Cultured; D002999:Clone Cells; D004261:DNA Replication; D006801:Humans; D019271:Hypoxanthine; D007041:Hypoxanthine Phosphoribosyltransferase / Q000172:deficiency* / Q000235:genetics; D007042:Hypoxanthines / Q000378:metabolism; D007376:Interleukin-2 / Q000302:isolation & purification; D007700:Kinetics; D009154:Mutation; D013601:T-Lymphocytes / Q000166:cytology* / Q000201:enzymology; D013936:Thymidine / Q000378:metabolism
chemical_list: D007042:Hypoxanthines; D007376:Interleukin-2; D019271:Hypoxanthine; D007041:Hypoxanthine Phosphoribosyltransferase; D013936:Thymidine