Abstract：
:To determine whether expression of the XPD/ERCC2 repair gene in trichothiodystrophy (TTD) group D cells could restore mutagenesis characteristics of repair-proficient cells, we compared the UV mutagenesis of normal cells, TTD group D cells, and TTD group D cells retrovirally transduced by the wild-type XPD/ERCC2 gene (TTD + ERCC2 cells). We first verified the expression of the XPD protein, correction of UV cell survival, and DNA repair ability of TTD + ERCC2 cells. UV-induced mutations were studied using the pR2 shuttle vector. The addition of the XPD/ERCC2 gene in TTD cells led to a significant but partial decrease of mutation frequency compared with the parental TTD cells. Types of mutations of TTD + ERCC2 cells get closer to those observed in normal cells (ie., a reduction of multiple mutations). New hotspots appeared and some disappeared in the complemented line, suggesting that hotspot distribution is particular to each cell line and cannot be correlated with the repair status of the cells. In conclusion, the expression of the XPD/ERCC2 repair gene completely corrected UV hypersensitivity and almost all types of mutations of TTD group D cells, whereas hypermutagenesis was partially corrected.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Marionnet C,Quilliet X,Benoit A,Armier J,Sarasin A,Stary Asubject
Has Abstractpub_date
1996-12-01 00:00:00pages
5450-6issue
23eissn
0008-5472issn
1538-7445journal_volume
56pub_type
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