Cited by 1,329DNA Repair MechanismsPARP inhibition in cancer therapyEffects of Radiation Exposure

Regulation of DNA double-strand break repair pathway choice

Shrivastav, Meena, De Haro, Leyma P, Nickoloff, Jac A·2008·Cell Research

Abstract

DNA double-strand breaks (DSBs) are critical lesions that can result in cell death or a wide variety of genetic alterations including large- or small-scale deletions, loss of heterozygosity, translocations, and chromosome loss. DSBs are repaired by non-homologous end-joining (NHEJ) and homologous recombination (HR), and defects in these pathways cause genome instability and promote tumorigenesis. DSBs arise from endogenous sources including reactive oxygen species generated during cellular metabolism, collapsed replication forks, and nucleases, and from exogenous sources including ionizing radiation and chemicals that directly or indirectly damage DNA and are commonly used in cancer therapy. The DSB repair pathways appear to compete for DSBs, but the balance between them differs widely among species, between different cell types of a single species, and during different cell cycle phases of a single cell type. Here we review the regulatory factors that regulate DSB repair by NHEJ and HR in yeast and higher eukaryotes. These factors include regulated expression and phosphorylation of repair proteins, chromatin modulation of repair factor accessibility, and the availability of homologous repair templates. While most DSB repair proteins appear to function exclusively in NHEJ or HR, a number of proteins influence both pathways, including the MRE11/RAD50/NBS1(XRS2) complex, BRCA1, histone H2AX, PARP-1, RAD18, DNA-dependent protein kinase catalytic subunit (DNA-PKcs), and ATM. DNA-PKcs plays a role in mammalian NHEJ, but it also influences HR through a complex regulatory network that may involve crosstalk with ATM, and the regulation of at least 12 proteins involved in HR that are phosphorylated by DNA-PKcs and/or ATM.

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Crossref · 10.1038/cr.2007.111

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  • Homologous recombination uses a long homologous sequence in S/G2 when sister chromatids are templates.

    “Homologous recombination uses a long homologous sequence to guide repair in the S phase and G2 phase of the cell cycle, in which sister chromatids are available as templates125.”

    From Molecular regulation of stem cell quiescence (2013) · cites this paper as [125]

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Authors
Shrivastav, M., De Haro, L. P., & Nickoloff, J. A.
Affiliations
University of New Mexico (US)
Corresponding author
Nickoloff, Jac A
Venue
Cell Research
Published
2007-12-24
Volume
18
Issue
1
Pages
134-147
ISSN
  • 1001-0602 (ISSN-L)
  • 1748-7838
OpenAlex
W2010711320
Cited by
1,329
References
149
Citations by year
2026: 25 · 2025: 46 · 2024: 54 · 2023: 59 · 2022: 80 · 2021: 80 · 2020: 56 · 2019: 57 · 2018: 70 · 2017: 76 · 2016: 79 · 2015: 79 · 2014: 67 · 2013: 86 · 2012: 83
FWCI
5.79
Type
journal article
Language
en
Open access
closed
Locations
  • Cell Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Michigan State University
  • College of Engineering, Michigan State University
  • National Cancer Institute (R01CA100862)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
Keywords
DNA double-strand break repair, non-homologous end joining, homologous recombination, DNA-PKcs, ATM, Mre11-Rad50-Nbs1 complex, BRCA1, histone H2AX, PARP1, RAD18, protein phosphorylation, chromatin regulation, genomic instability, DNA damage response
MeSH terms
Animals, Cell Cycle, Chromosome Aberrations, DNA Repair, DNA-Binding Proteins, Eukaryotic Cells, Humans, Models, Biological, Nuclear Proteins, Recombination, Genetic, Species Specificity, Yeasts, Signal Transduction, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Tumor Suppressor Proteins, Genomic Instability, DNA-Activated Protein Kinase, DNA Breaks, Double-Stranded, Ataxia Telangiectasia Mutated Proteins

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