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Age-related increase of mitomycin C-induced micronuclei in lymphocytes from Down's syndrome subjects

Mutation Research/DNAging, ISSN: 0921-8734, Vol: 237, Issue: 5, Page: 247-252
1990
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Article Description

Peripheral blood lymphocytes from 7 patients with Down's syndrome (DS; trisomy 21) and 14 healthy age-matched controls were studied for the induction of micronuclei (MN) by the cytokinesis-block method. The spontaneous incidence of MN in lymphocytes from DS subjects was lower than that of control cultures. When lymphocytes were treated with mitomycin C (MMC) at the beginning of the culture period, an increase in MN formation was found in cells from both DS and control subjects. In DS subjects this increase was much more marked than in control donors. This effect had to be ascribed to cells from older DS subjects (37–55 years old), which showed an MMC-induced MN formation that was markedly and significantly higher than that observed in cells from younger (9–16 years old) DS subjects.

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