title: Mutagenicity of some substituted 1-phenyl-3,3-dimethyltriazenes. II. Chromosomal aberrations in human peripheral lymphocytes in vitro.
abstract: The chromosome-breaking activity of four 1-(phenyl)-3,3-dimethyltriazenes was tested in vitro on human peripheral blood lymphocytes using S9 mix as a metabolic activation system. 1-(4-Nitrophenyl)-3,3-dimethyltriazene was the most active compound. The difference in the frequency of chromosomal aberrations in a test with and without metabolic activation was significant at the 1% level of significance. The lowest frequency of chromosomal aberrations was induced by 1-(4-methylphenyl)-3,3-dimethyltriazene which, under the conditions of this experiment, is the least stable and probably rapidly degraded to non-active compounds. The chromosomal aberrations were also induced by 1-(4-chlorophenyl)-3,3-dimethyltriazene and 1-(4-bromophenyl)-3,3-dimethyltriazene, this activity was unrelated to metabolic activation.
mesh_terms: D002478:Cells, Cultured; D002869:Chromosome Aberrations; D006801:Humans; D008214:Lymphocytes / Q000166:cytology* / Q000187:drug effects; D009152:Mutagenicity Tests; D009153:Mutagens / Q000633:toxicity*; D013329:Structure-Activity Relationship; D014226:Triazenes / Q000633:toxicity*
chemical_list: D009153:Mutagens; D014226:Triazenes; C013879:1-(4-chlorophenyl)-3,3-dimethyltriazene; C051647:1-(4-nitrophenyl)-3,3-dimethyltriazene; C051646:1-(4-bromophenyl)-3,3-dimethyltriazene; C008848:1-phenyl-3,3-dimethyltriazene