title: [Viability and proliferative activity of a Chinese hamster cell culture exposed to nitrosoureas in exponential and stationary growth phases].
abstract: The lethal effect of antitumor nitrosourea chloroethyl derivatives on proliferating (exponential phase of growth) and non-proliferating (stationary phase of growth) cells is observed at a concentration 5-fold less than that of methyl derivatives revealed by the colony-formation technique. 1,3-bis(2-chlororoethyl)-1-nitrosourea is equally effective towards proliferating and non-proliferating cells, but chlorozotocin exerts a primary cytotoxic effect on proliferating cells. 1-methyl-1-nitrosourea at low concentration causes death more readily of proliferating cells than non-proliferating ones. However, studies on proliferative activity during the first hours after treatment with 1-methyl-1-nitrosourea revealed drug sensitivity in cells being at the early stationary phase of growth.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D009607:Nitrosourea Compounds / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D009607:Nitrosourea Compounds
vernacular_title: Zhiznesposobnost' i proliferativnaia aktivnost' kultury kletok kitaĭskogo khomiachka pri deĭstvii nitrozomochevin v éksponentsial'noĭ i statsionarnoĭ fazakh rosta.