Proceedings: Unscheduled DNA synthesis studied in the intact animal
نویسندگان
چکیده
منابع مشابه
unscheduled DNA synthesis and genotoxicity
Results from a recent, new assay suggest that omeprazole, a potent inhibitor of gastric acid secretion, is genotoxic. The principle of this assay is that the non-proliferating zone of surface gastric epithelial cells can be selectively removed by controlied digestion so that any incorporation of tritiated thymidine into these cells represents unscheduled DNA synthesis. Parietal cells (which are...
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Unscheduled DNA synthesis (UDS) induced by melphalan, nitrogen mustard and ultra-violet irradiation was studied in bone marrow cells from myeloma patients. In a previous study, normal bone marrow cells in various stages of maturation were found to display a gradual decrease in UDS parallel with the process of maturation. Myeloma cells showed a similar pattern. Poorly differentiated myeloma cell...
متن کاملParticipation of DNA polymerases alpha and beta in unscheduled DNA synthesis in mammalian cells.
Repair polymerases participating in unscheduled DNA synthesis in isolated liver nuclei, bleomycin-treated permeable cells and in ultraviolet-irradiated living cells were studied using two specific inhibitors of DNA polymerases, aphidicolin and 2', 3'-dideoxythymidine-5'-triphosphate. Unscheduled, i.e., repair, DNA synthesis in rat liver nuclei, and in bleomycin-treated permeable SR-C3H/He and X...
متن کاملUnscheduled DNA synthesis in cell lysate system reflecting DNA repair in vivo.
A cell lysate system by which DNA repair (unscheduled) synthesis induced by DNA damaging agents can be measured at high sensitivity as previously reported (9, 18) was characterized. Time-course experiments in which the in vivo incubation time with hydroxyurea and arabinofuranosyl cytosine after UV irradiation was changed suggested that the number of single strand gaps increased in the presence ...
متن کاملUnscheduled DNA synthesis after partial UV irradiation of the cell nucleus. Distribution in interphase and metaphase.
Cells of an euploid strain of the Chinese hamster synchronized in the GI phase were microirradiated in the nucIeus with a laser UV microbeam (A=257 nm) and pulse-labelled with [3H]thymidine. In autoradiographs of cells fixed immediately after the pulse unscheduled DNA synthesis (UDS) was found restricted to tbe microirradiated part of the nueleus. Tbe rate of UDS varied with the UV energy appli...
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ژورنال
عنوان ژورنال: British Journal of Cancer
سال: 1975
ISSN: 0007-0920,1532-1827
DOI: 10.1038/bjc.1975.189