title: Misonidazole and potentially lethal damage.
abstract: The existence of potentially lethal damage (PLD) is demonstrated in exponentially growing CHO cells exposed to misonidazole in hypoxia. The method of hypertonic post-treatment of cells was used in these studies. Misonidazole-induced PLD differs in many characteristics from radiation-induced PLD. The repair kinetics of misonidazole-induced PLD are much slower than for the repair of radiation-induced PLD (hours vs. minutes). No significant repair of misonidazole-induced PLD took place at 25 degrees C. Other differences are discussed. Hypertonic post-treatment of irradiated cells which had been pre-incubated with misonidazole to non-toxic levels, gave survival data consistent with the interpretation that no radiation PLD can be induced in such cells.
mesh_terms: D000332:Aerobiosis; D000818:Animals; D002470:Cell Survival / Q000187:drug effects* / Q000528:radiation effects; D002478:Cells, Cultured; D006224:Cricetinae; D003412:Cricetulus; D005260:Female; D000860:Hypoxia / Q000503:physiopathology; D008920:Misonidazole / Q000494:pharmacology*; D009593:Nitroimidazoles / Q000494:pharmacology*; D010053:Ovary; D014965:X-Rays
chemical_list: D009593:Nitroimidazoles; D008920:Misonidazole