title: G2 chromosomal radiosensitivity in Fanconi's anemia.
abstract: Both the peripheral lymphocytes from 4 patients affected with the inherited disease Fanconi's anemia (FA), and tissue-culture fibroblasts from skin biopsies from 3 patients similarly affected were found to be about twice as sensitive to the induction of chromatid-type chromosomal aberrations by X-rays administratered in the G2 phase of the cell cycle as cells from normal controls. Using tritiated thymidine labelling of peripheral lymphocytes and of cultured fibroblasts, it was determined that 3 affected patients and 3 normal controls all had similar percent labeled mitoses (PLM) curves, so the increased induced aberration yields seen in the FA cells do not appear to be simply a consequences of a longer than normal G2 phase of the cell cycle.
mesh_terms: D000741:Anemia, Aplastic / Q000235:genetics*; D002460:Cell Line; D002478:Cells, Cultured; D002869:Chromosome Aberrations; D002875:Chromosomes / Q000528:radiation effects*; D005199:Fanconi Anemia / Q000235:genetics*; D006801:Humans; D007399:Interphase; D008214:Lymphocytes / Q000648:ultrastructure; D011836:Radiation Tolerance