title: Normal rate of DNA breakage in xeroderma pigmentosum complementation group E cells treated with 8-methoxypsoralen plus near-ultraviolet radiation.
abstract: Treatment of normal and xeroderma pigmentosum complementation group E skin fibroblasts with 8-methoxypsoralen plus repeated doses of near-ultraviolet radiation elicited a marked increase in DNA strand breakage during a subsequent incubation. No such induction of breaks was noted with cells from xeroderma pigmentosum groups A and D. The results suggest that the gene product which is deficient in xeroderma pigmentosum group E cells is involved in a critical step of DNA repair of far-ultraviolet photoproducts but not so in the repair of psoralen cross-links.
mesh_terms: D004247:DNA / Q000528:radiation effects*; D005347:Fibroblasts / Q000187:drug effects; D006801:Humans; D066298:In Vitro Techniques; D008730:Methoxsalen / Q000494:pharmacology*; D012867:Skin / Q000166:cytology / Q000187:drug effects; D014466:Ultraviolet Rays; D014983:Xeroderma Pigmentosum / Q000235:genetics* / Q000473:pathology
chemical_list: D004247:DNA; D008730:Methoxsalen