Abstract
Blood samples from six Down's syndrome (DS) and six age- and sex-matched controls were cultured for 72 h in the presence of BrdUrd. Lymphocytes were then analysed at their second mitosis for sister chromatid exchange (SCE) and at their first mitosis for chromosome aberrations. Treatment with adriamycin (30 and 60 ng) showed a significant increase in frequency of SCE and chromosome aberrations in DS lymphocytes compared to normal lymphocytes at initiation of culture. Cells treated with adriamycin (ADR) for the last 24 h also showed a significant increase in SCE in DS lymphocytes compared to normal lymphocytes. A significant increase in chromatid-type aberrations was also recorded in DS lymphocytes after both treatments cultured for the last 24 h.
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