Abstract:
:Human, Chinese hamster or Chinese hamster/human hybrid cytoplasts were fused with UV-irradiated xeroderma pigmentosum group A (XP-A) cells. Unscheduled DNA synthesis (UDS) of the XP-A nucleus was measured 0-2 and 2-4 h after seeding of the fused population. Human cytoplasts did correct the defect in the XP-A nucleus immediately after fusion, whereas the chinese hamster cytoplasts did not show this rapid increase in excision repair. The results obtained after fusion of cytoplasts isolated from a panel of 26 Chinese hamster-human hybrids showed that chromosome 1 bears genetic information that is necessary for the rapid correction of the XP-A defect. Furthermore, this genetic information was regionally assigned to 1q42-qter by analysing hybrid cell lines having retained various segments of chromosome 1. Cytoplasts from a Chinese hamster/XP-A hybrid containing chromosome 1 of XP-A origin corrected also the defect with fast kinetics. This result indicate that the correcting factor consists of human and Chinese hamster components. As a consequence, the gene mapped on chromosome 1 may not be the gene which is mutated in XP-A cells.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Keijzer W,Stefanini M,Bootsma D,Verkerk A,Geurts van Kessel AH,Jongkind JF,Westerveld Adoi
10.1016/0014-4827(87)90209-6subject
Has Abstractpub_date
1987-04-01 00:00:00pages
490-501issue
2eissn
0014-4827issn
1090-2422journal_volume
169pub_type
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