title: Transient DNA lesions induced by benzo[a]pyrene in Chinese hamster ovary cells.
abstract: Alkaline sucrose gradient sedimentation analysis was used to detect DNA lesions induced by benzo[a]pyrene B(a)P in Chinese hamster ovary cells. The number of lesions detected immediately following treatment with 10(-4) M B(a)P was related directly to the duration of treatment. When treated cells were incubated in a B(a)P-free medium, the majority of lesions disappeared rapidly and could no longer be detected 15 min following treatment. These data indicate that a population of B(a)P-induced DNA lesions may be removed by a rapid DNA-repair process. The transient nature of such lesions should be considered when assays for DNA damage or repair are designed and interpreted.
mesh_terms: D000818:Animals; D001564:Benzo(a)pyrene; D001580:Benzopyrenes / Q000633:toxicity*; D002460:Cell Line; D006224:Cricetinae; D003412:Cricetulus; D004247:DNA / Q000235:genetics*; D005260:Female; D007700:Kinetics; D009152:Mutagenicity Tests; D009153:Mutagens / Q000633:toxicity*; D009154:Mutation; D010053:Ovary; D013997:Time Factors
chemical_list: D001580:Benzopyrenes; D009153:Mutagens; D001564:Benzo(a)pyrene; D004247:DNA