title: Potentially carcinogenic analogues of the carcinogen hexamethylphosphoramide: evaluation in vitro.
abstract: Experiments conducted in vitro are described which indicate that a family of specifically substituted phosphoramides may share the carcinogenic properties displayed by the structurally novel carcinogen, hexamethylphosphoramide (HMPA). Most of the analogues tested only gave a positive response in vitro when using a substantially modified liver homogenate activation system (S-9 mix). The analogy drawn in our earlier paper between this new class of potential carcinogens and the nitrosamine carcinogens, has been strengthened. The following compounds gave a positive response in the cell transformation assay of Styles: hexamethylphosphoramide (HMPA), hexamethylphosphorous triamide, hexamethylphosphorothioic triamide, tripiperidinophosphine oxide, phosphorothioic trimorpholide and diethoxymorpholinophosphine oxide (DEMPA).
mesh_terms: D000577:Amides / Q000633:toxicity; D002470:Cell Survival / Q000187:drug effects; D002471:Cell Transformation, Neoplastic / Q000139:chemically induced*; D002999:Clone Cells; D009943:Organophosphorus Compounds / Q000633:toxicity*; D013329:Structure-Activity Relationship
chemical_list: D000577:Amides; D009943:Organophosphorus Compounds