Journal
JOURNAL OF CELLULAR PHYSIOLOGY
Volume 231, Issue 1, Pages 15-24Publisher
WILEY
DOI: 10.1002/jcp.25053
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Funding
- NIH [R01GM092866, P01GM105473]
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM092866, P01GM105473] Funding Source: NIH RePORTER
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Preserving the integrity of the DNA double helix is crucial for the maintenance of genomic stability. Therefore, DNA double-strand breaks represent a serious threat to cells. In this review, we describe the two major strategies used to repair double strand breaks: non-homologous end joining and homologous recombination, emphasizing the mutagenic aspects of each. We focus on emerging evidence that homologous recombination, long thought to be an error-free repair process, can in fact be highly mutagenic, particularly in contexts requiring large amounts of DNA synthesis. Recent investigations have begun to illuminate the molecular mechanisms by which error-prone double-strand break repair can create major genomic changes, such as translocations and complex chromosome rearrangements. We highlight these studies and discuss proposed models that may explain some of the more extreme genetic changes observed in human cancers and congenital disorders. J. Cell. Physiol. 230: 15-24, 2016. (c) 2015 Wiley Periodicals, Inc.
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