title: Mutagenicity studies with the mouse spot test.
abstract: The mammalian spot test, which detects somatic gene mutations in mouse embryos, was investigated with selected chemicals to (a) further validate this test system (ENU, EMS, 2AAF, colchicine) and (b) evaluate the mutagenic potential, in a whole-mammal system, of environmental compounds that had been previously recognized as mutagens in other mammalian or submammalian test systems (1,2-dichloroethane, hydroquinone, nitrofurantoin, o-phenylenediamine, fried sausage extract). Of these substances, ENU, EMS and 2AAF were significantly mutagenic, 1,2-dichloroethane was probably weakly mutagenic. The ENU data were used to estimate the number of pigment precursor cells present at the time of treatment (day 9.25). We also describe in this report the use of a fluorescence microscope for classification of hairs from spots on the coat of C57BL/6JHan X T hybrids.
mesh_terms: D015073:2-Acetylaminofluorene / Q000633:toxicity; D000818:Animals; D003078:Colchicine / Q000633:toxicity; D004622:Embryo, Mammalian / Q000187:drug effects; D004787:Environmental Pollution; D005020:Ethyl Methanesulfonate / Q000633:toxicity; D005025:Ethylene Dichlorides / Q000633:toxicity; D005038:Ethylnitrosourea / Q000633:toxicity; D005260:Female; D051379:Mice; D008810:Mice, Inbred C57BL; D009152:Mutagenicity Tests; D009153:Mutagens / Q000633:toxicity*; D009154:Mutation; D011247:Pregnancy
chemical_list: D005025:Ethylene Dichlorides; D009153:Mutagens; C024565:ethylene dichloride; D005020:Ethyl Methanesulfonate; D015073:2-Acetylaminofluorene; D005038:Ethylnitrosourea; D003078:Colchicine