Aberrant DNA strand break repair can result in mutations that include loss of heterozygosity, chromosomal rearrangements, and point mutations. The genomic instability that results from aberrant repair of double- strand breaks is known to be associated with cancer. The broad, long-term objective of the proposed research is to identify and characterize the role of DNA polymerase beta in the repair of strand breaks, and to further our understanding of the impact of aberrant repair on genomic instability. We have recently constructed a mouse that is conditionally deleted of the DNA polymerase beta gene, and provide evidence that this gene is involved in break repair.
The specific aims of the grant are to test the hypothesis that Pol Beta, and specifically its DNA synthesis function, is critical for double strand break repair, and to test the hypothesis that tissues deleted of Pol Beta have higher frequencies of mutagenesis, and contain the types of mutations that are consistent with aberrant double strand break repair. To carry out our aims we will characterize double-strand break repair in mouse tissues that are conditionally deleted of the Pol Beta gene, and will obtain mutation frequencies and spectra, using three different transgenes that will be incorporated into the mice. These experiments have the potential to further our understanding of the relationship between genomic instability and the onset or progression of cancer. ? ? ?

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
1R01CA116753-01A1
Application #
7105255
Study Section
Special Emphasis Panel (ZRG1-ONC-K (06))
Program Officer
Okano, Paul
Project Start
2006-04-01
Project End
2011-02-28
Budget Start
2006-04-01
Budget End
2007-02-28
Support Year
1
Fiscal Year
2006
Total Cost
$290,213
Indirect Cost
Name
Yale University
Department
Radiation-Diagnostic/Oncology
Type
Schools of Medicine
DUNS #
043207562
City
New Haven
State
CT
Country
United States
Zip Code
06520
Sizova, Daria V; Keh, Agnes; Taylor, Ben F et al. (2015) The R280H X-ray cross-complementing 1 germline variant induces genomic instability and cellular transformation. DNA Repair (Amst) 31:73-9
Kidane, D; Murphy, D L; Sweasy, J B (2014) Accumulation of abasic sites induces genomic instability in normal human gastric epithelial cells during Helicobacter pylori infection. Oncogenesis 3:e128
Ray, Sreerupa; Menezes, Miriam Rose; Senejani, Alireza et al. (2013) Cellular roles of DNA polymerase beta. Yale J Biol Med 86:463-9
Kidane, Dawit; Sakkas, Denny; Nottoli, Timothy et al. (2013) Kinesin 5B (KIF5B) is required for progression through female meiosis and proper chromosomal segregation in mitotic cells. PLoS One 8:e58585
Kidane, Dawit; Dalal, Shibani; Keh, Agnes et al. (2011) DNA polymerase beta is critical for genomic stability of sperm cells. DNA Repair (Amst) 10:390-7
Kidane, Dawit; Jonason, Alan S; Gorton, Timothy S et al. (2010) DNA polymerase beta is critical for mouse meiotic synapsis. EMBO J 29:410-23
Senejani, Alireza G; Sweasy, Joann B (2010) Eukaryotic gene invasion by a bacterial mobile insertion sequence element IS2 during cloning into a plasmid vector. Genome Integr 1:2