Complementation of a DNA Repair Defect in Xeroderma Pigmentosum Cells by Transfer of Human Chromosome 9
Overview
Authors
Affiliations
Complementation of the repair defect in xeroderma pigmentosum cells of complementation group A was achieved by the transfer of human chromosome 9. A set of mouse-human hybrid cell lines, each containing a single Ecogpt-marked human chromosome, was used as a source of donor chromosomes. Chromosome transfer to XPTG-1 cells, a hypoxanthine/guanine phosphoribosyltransferase-deficient mutant of simian virus 40-transformed complementation group A cells, was achieved by microcell fusion and selection for Ecogpt. Chromosome-transfer clones of XPTG-1 cells, each containing a different human donor chromosome, were analyzed for complementation of sensitivity to UV irradiation. Among all the clones, increased levels of resistance to UV was observed only in clones containing chromosome 9. Since our recipient cell line XPTG-1 is hypoxanthine/guanine phosphoribosyltransferase deficient, cultivation of Ecogpt+ clones in medium containing 6-thioguanine permits selection of cells for loss of the marker and, by inference, transferred chromosome 9. Clones isolated for growth in 6-thioguanine, which have lost the Ecogpt-marked chromosome, exhibited a UV-sensitive phenotype, confirming the presence of the repair gene(s) for complementation group A on chromosome 9.
Monochromosomal Hybrids and Chromosome Transfer: A Functional Approach for Gene Identification.
Kandpal R, Sandhu A, Kaur G, Kaur G, Athwal R Cancer Genomics Proteomics. 2017; 14(2):93-101.
PMID: 28387649 PMC: 5369314. DOI: 10.21873/cgp.20022.
The manipulation of chromosomes by mankind: the uses of microcell-mediated chromosome transfer.
Meaburn K, Parris C, Bridger J Chromosoma. 2005; 114(4):263-74.
PMID: 16133353 DOI: 10.1007/s00412-005-0014-8.
Jongmans W, Wiegant J, Oshimura M, James M, Lohman P, Zdzienicka M Hum Genet. 1993; 92(3):259-64.
PMID: 8406433 DOI: 10.1007/BF00244469.
Diatloff-Zito C, Rosselli F, Heddle J, MOUSTACCHI E Hum Genet. 1990; 86(2):151-61.
PMID: 2265827 DOI: 10.1007/BF00197697.
Lambert C, Schultz R, Smith M, McDaniel L, Donlon T, Stanbridge E Proc Natl Acad Sci U S A. 1991; 88(13):5907-11.
PMID: 2062869 PMC: 51987. DOI: 10.1073/pnas.88.13.5907.