Faculty Articles
Unscheduled DNA synthesis: the clinical and functional assay for global genomic DNA nucleotide excision repair
Publication Title
Methods in molecular biology
Publisher
Humana Press
ISSN
1064-3745
Publication Date
1-1-2014
Keywords
DNA Repair, DNA Replication, Genome, Human, Humans, MCF-7 Cells, Staining and Labeling, Tissue Fixation
Abstract
The unscheduled DNA synthesis (UDS) assay measures the ability of a cell to perform global genomic nucleotide excision repair (NER). This chapter provides instructions for the application of this technique by creating 6-4 photoproducts and pyrimidine dimers using UV-C irradiation. This procedure is designed specifically for quantification of the 6-4 photoproducts. Repair is quantified by the amount of radioactive thymidine incorporated during repair synthesis after this insult, and radioactivity is evaluated by grain counting after autoradiography. The results are used to clinically diagnose human DNA repair deficiency disorders and provide a basis for investigation of repair deficiency in human tissues or tumors. No other functional assay is available that directly measures the capacity to perform NER on the entire genome without the use of specific antibodies. Since live cells are required for this assay, explant culture techniques must be previously established. Host cell reactivation (HCR), as discussed in Chapter 37, is not an equivalent technique, as it measures only transcription-coupled repair (TCR) at active genes, a small subset of total NER.
DOI
10.1007/978-1-62703-739-6_36
Volume
1105
First Page
511
Last Page
532
Disciplines
Medicine and Health Sciences | Pharmacy and Pharmaceutical Sciences
NSUWorks Citation
Latimer, Jean Johanna and Kelly, Crystal M., "Unscheduled DNA synthesis: the clinical and functional assay for global genomic DNA nucleotide excision repair" (2014). Faculty Articles. 10.
https://nsuworks.nova.edu/hpd_corx_facarticles/10
