title: Influence of incorporated 5-bromodeoxyuridine on the frequencies of spontaneous and induced sister-chromatid exchanges, detected by immunological methods.
abstract: We have utilized monoclonal antibody against BrdUrd to detect sister-chromatid exchanges in CHO cells. This technique allows detection of SCEs at very low levels of BrdUrd incorporation. At incorporation level of 0.5%, a frequency of about 2 SCEs/cell/cycle was found. In a UV-sensitive mutant (43-3B) which has an increased spontaneous frequency of SCEs, it is found that this increase is due to incorporated BrdUrd. In MMS- and MMC-treated cells, an influence of BrdUrd on the frequencies of induced SCEs was found only when high concentrations of mutagens were employed.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D001973:Bromodeoxyuridine / Q000276:immunology / Q000494:pharmacology*; D002460:Cell Line; D006224:Cricetinae; D004305:Dose-Response Relationship, Drug; D008741:Methyl Methanesulfonate / Q000494:pharmacology; D016685:Mitomycin; D008937:Mitomycins / Q000494:pharmacology; D012854:Sister Chromatid Exchange / Q000187:drug effects*
chemical_list: D000911:Antibodies, Monoclonal; D008937:Mitomycins; D016685:Mitomycin; D008741:Methyl Methanesulfonate; D001973:Bromodeoxyuridine