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Mutat Res. 1981 Jan;80(1):213-9.

DNA repair in Bloom's syndrome fibroblasts after UV irradiation or treatment with mitomycin C.


Sensitivities to UV and mitomycin C (MC) of fibroblasts obtained from 3 Japanese patients with Bloom's syndrome (BS) were studied. One BS strain was more sensitive to UV than normal cells only in colony-forming ability. Other responses to UV, such as unscheduled DNA synthesis, host-cell reactivation and removal of UV-endonuclease-susceptible sites, were normal in all 3 strains. These BS strains were more sensitive to MC than were normal cells. However, the amounts of unscheduled DNA synthesis after treatment with MC in BS cells did not differ from those in normal cells.

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