title: 6-Thioguanine-resistant T-lymphocyte autoradiographic assay. Determination of variation frequencies in individuals suspected of radiation exposure.
abstract: We used the autoradiographic assay to assess human in vivo somatic cell gene mutation at the hypoxanthine guanine phosphoribosyl transferase (HGPRT) locus in T-lymphocytes. Cells able to incorporate tritiated thymidine in vitro in the presence of 6-thioguanine were enumerated in order to determine 6-thioguanine-resistance (TGr) variant frequencies in cryopreserved lymphocytes from 17 normal control individuals, from 3 persons suspected to have been exposed to 60Co in an accident in Cd. Juárez (Mexico), studied 24 months after the accident, and from 4 individuals who were in Kiev during the radiation accident in Chernobyl (U.S.S.R.); 2 of them were studied 1 month after the accident, and again 1 year after the first sampling, the other 2 were studied 13 months after the accident. The data obtained indicate that this assay may be useful in any laboratory of cytogenetics for human population monitoring and that its use following accidental exposure to ionizing radiation should be further evaluated.
authors.affiliation: Instituto de Investigaciones Biomédicas, UNAM, Mexico D.F., Mexico.
authors.forename: P
authors.initials: P
authors.lastname: Ostrosky-Wegman
authors.forename: R
authors.initials: R
authors.lastname: Montero
authors.forename: A
authors.initials: A
authors.lastname: Palao
authors.forename: C
authors.initials: C
authors.lastname: Cortinas de Nava
authors.forename: F
authors.initials: F
authors.lastname: Hurtado
authors.forename: R J
authors.initials: RJ
authors.lastname: Albertini
mesh_terms: D000059:Accidents; D000328:Adult; D001345:Autoradiography / Q000379:methods*; D002478:Cells, Cultured; D003037:Cobalt Radioisotopes / Q000633:toxicity; D004351:Drug Resistance / Q000528:radiation effects; D005260:Female; D005720:Gamma Rays; D006801:Humans; D007041:Hypoxanthine Phosphoribosyltransferase / Q000235:genetics; D008297:Male; D008875:Middle Aged; D009152:Mutagenicity Tests / Q000379:methods*; D009688:Nuclear Reactors; D011832:Radiation Injuries / Q000235:genetics*; D013601:T-Lymphocytes / Q000187:drug effects / Q000201:enzymology / Q000528:radiation effects*; D013866:Thioguanine / Q000494:pharmacology*; D014455:Ukraine
chemical_list: D003037:Cobalt Radioisotopes; D007041:Hypoxanthine Phosphoribosyltransferase; D013866:Thioguanine