title: The clastogenic activity of dinitropyrenes in a rat-liver epithelial cell line.
abstract: The ability of 1,6-dinitropyrene and 1,8-dinitropyrene to induce chromosome aberrations has been examined in a rat epithelial cell line (RL4). Both compounds were found to be potent clastogenic agents in these cells, inducing predominantly chromatid type abberations. The number of aberrant metaphases was dose-related up to 1.25 micrograms/ml, after which the response showed a plateau at a frequency of around 60%. The number of chromatid gaps per 100 cells also increased linearly with concentration from 3.5 in the control cultures up to 117 with 1,6-DNP (1.25 micrograms/ml) and 98 with 1,8-DNP (2.5 micrograms/ml), indicating that the induction of chromatid gaps was a valid and sensitive measure of chromosome damage in this cell line. The fact that a positive result as obtained in RL4 cells implies that these cells contain enzyme systems which are capable of converting dinitropyrenes to a mutagenic form.
mesh_terms: D019297:2,4-Dinitrophenol; D000818:Animals; D002460:Cell Line; D002869:Chromosome Aberrations; D004140:Dinitrophenols / Q000494:pharmacology; D004848:Epithelium / Q000187:drug effects; D007700:Kinetics; D008099:Liver / Q000187:drug effects*; D009152:Mutagenicity Tests; D009153:Mutagens; D009154:Mutation; D011721:Pyrenes / Q000494:pharmacology*; D051381:Rats
chemical_list: D004140:Dinitrophenols; D009153:Mutagens; D011721:Pyrenes; C033310:1,8-dinitropyrene; C033309:1,6-dinitropyrene; D019297:2,4-Dinitrophenol