title: Responses of the L5178Y tk+/tk- mouse lymphoma cell forward mutation assay. II: 18 coded chemicals.
abstract: Eighteen chemicals were tested for their mutagenic potential in the L5178Y tk+/- mouse lymphoma cell forward mutation assay by the use of procedures based upon those described by Clive and Spector [Mutat Res 44:269-278, 1975] and Clive et al [Mutat Res 59:61-108, 1979]. Cultures were exposed to the chemicals for 4 hr, then cultured for 2 days before plating in soft agar with or without trifluorothymidine (TFT), 3 micrograms/ml. The chemicals were tested at least twice. Significant responses were obtained with benzofuran, benzyl chloride, bromodichloromethane, butylated hydroxytoluene, chlorendic acid, o-chlorobenzalmalonitrile, 1,2,3,4-diepoxybutane, dimethyl formamide, dimethyl hydrogen phosphite, furfural, glutaraldehyde, hydroquinone, 8-hydroxyquinoline, and resorcinol. Apart from bromodichloromethane, butylated hydroxytoluene and dimethyl hydrogen phosphite, rat liver S9 mix was not a requirement for the activity of any of these compounds. Chemicals not identified as mutagens were water, tert-butyl alcohol, pyridine, and witch hazel.
authors.affiliation: Inveresk Research International Limited, Musselburgh, United Kingdom.
authors.forename: D B
authors.initials: DB
authors.lastname: McGregor
authors.forename: A
authors.initials: A
authors.lastname: Brown
authors.forename: P
authors.initials: P
authors.lastname: Cattanach
authors.forename: I
authors.initials: I
authors.lastname: Edwards
authors.forename: D
authors.initials: D
authors.lastname: McBride
authors.forename: W J
authors.initials: WJ
authors.lastname: Caspary
mesh_terms: D000818:Animals; D001711:Biotransformation; D002455:Cell Division / Q000187:drug effects; D007940:Leukemia L5178; D051379:Mice; D008862:Microsomes, Liver / Q000378:metabolism; D009152:Mutagenicity Tests / Q000379:methods* / Q000592:standards; D009153:Mutagens / Q000633:toxicity*; D013937:Thymidine Kinase / Q000235:genetics*; D014407:Tumor Cells, Cultured
chemical_list: D009153:Mutagens; D013937:Thymidine Kinase