Summary
The distribution of spontaneous sister chromatid exchanges (SCEs) was studied in PHA-stimulated lymphocytes from 15 patients affected by xeroderma pigmentosum (XP). The study of unscheduled DNA synthesis (UDS) in twelve of these patients showed that seven were deficient and five proficient. The number of SCEs in XP patient cells was higher than in those of 19 controls, and the distributions of SCEs per cell were significantly different. However, the results varied when XP patients were considered in relation to their UDS: the group of XP patients with proficient UDS did not differ, whereas the group of XP patients with deficient UDS was very significantly different from controls. The group not tested for UDS was similar to the deficient UDS group. The possible relationship between the increase of SCEs and the type of DNA repair defect is discussed.
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Aledo, R., Renault, G., Prieur, M. et al. Increase of sister chromatid exchanges in excision repair deficient xeroderma pigmentosum. Hum Genet 81, 221–225 (1989). https://doi.org/10.1007/BF00278992
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DOI: https://doi.org/10.1007/BF00278992