title: An SV40-transformed xeroderma pigmentosum group D cell line: establishment, ultraviolet sensitivity, transfection efficiency and plasmid mutation induction.
abstract: Fibroblasts from a patient with xeroderma pigmentosum complementation group D were treated with Simian virus 40 to establish a transformed cell line suitable for studies of DNA-mediated gene transfer. After progressing through 2 crises, a stable line, XP6Be(SV40), was established and cultured for more than 1 year. This line retains the characteristic xeroderma pigmentosum ultraviolet hypersensitivity and is able to complement a SV40-transformed group A line when fused and assayed for ultraviolet radiation inhibition of colony-forming ability. XP6Be(SV40) expressed high levels of transfected chloramphenicol acetyltransferase activity (0.1 nmole X mg-1 X min-1) in a transient expression assay, showed stable expression of transfected gpt or neo genes (frequency 1-20 X 10(-5)), and permitted replication of the mutagenesis shuttle vector plasmid, pZ189. Ultraviolet treatment (500 J X m-2) of pZ189 prior to replication in XP6Be(SV40) resulted in a large reduction in plasmid yield (5% survival) and a 60-fold increase in the mutation frequency, reflecting the reduced ability of these cells to repair ultraviolet-damaged transfecting DNA. This cell line provides the opportunity to utilize transfection studies in cells with the xeroderma pigmentosum group D defect in excision repair.
mesh_terms: D000123:Acetyltransferases / Q000096:biosynthesis; D001426:Bacterial Proteins / Q000096:biosynthesis; D002460:Cell Line; D002472:Cell Transformation, Viral; D015500:Chloramphenicol O-Acetyltransferase; D004260:DNA Repair; D005347:Fibroblasts / Q000528:radiation effects; D005816:Genetic Complementation Test; D005822:Genetic Vectors; D006801:Humans; D009154:Mutation; D010957:Plasmids; D011836:Radiation Tolerance; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D013539:Simian virus 40 / Q000502:physiology; D014162:Transfection; D014466:Ultraviolet Rays; D014983:Xeroderma Pigmentosum / Q000235:genetics / Q000473:pathology*
chemical_list: D001426:Bacterial Proteins; D011993:Recombinant Fusion Proteins; D000123:Acetyltransferases; D015500:Chloramphenicol O-Acetyltransferase