title: Superoxide anion generated by potassium superoxide is cytotoxic and mutagenic to chinese hamster ovary cells.
abstract: Chinese hamster ovary cells in vitro were exposed to superoxide anion (O2-) generated by the addition of potassium superoxide (KO2) to the cell culture media. It was determined that 2 nmoles O2- per ml media resulted in approximately 50% cell mortality. The number of 6-thioguanine-resistant mutants was also increased in a dose-related fashion. Both these effects of KO2 were inhibitable by the prior addition of superoxide dismutase, indicating that superoxide anion is cytotoxic and genotoxic in mammalian cells.
mesh_terms: D000818:Animals; D002460:Cell Line; D006224:Cricetinae; D003412:Cricetulus; D005260:Female; D009152:Mutagenicity Tests; D010053:Ovary / Q000187:drug effects; D013482:Superoxide Dismutase / Q000378:metabolism; D013481:Superoxides / Q000378:metabolism* / Q000633:toxicity
chemical_list: D013481:Superoxides; C039316:potassium superoxide; D013482:Superoxide Dismutase