The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.
Pathways of DNA Double-Strand Break Repair during the Mammalian Cell Cycle
Open accessAbstract
Little is known about the quantitative contributions of nonhomologous end joining (NHEJ) and homologous recombination (HR) to DNA double-strand break (DSB) repair in different cell cycle phases after physiologically relevant doses of ionizing radiation. Using immunofluorescence detection of gamma-H2AX nuclear foci as a novel approach for monitoring the repair of DSBs, we show here that NHEJ-defective hamster cells (CHO mutant V3 cells) have strongly reduced repair in all cell cycle phases after 1 Gy of irradiation. In contrast, HR-defective CHO irs1SF cells have a minor repair defect in G(1), greater impairment in S, and a substantial defect in late S/G(2). Furthermore, the radiosensitivity of irs1SF cells is slight in G(1) but dramatically higher in late S/G(2), while V3 cells show high sensitivity throughout the cell cycle. These findings show that NHEJ is important in all cell cycle phases, while HR is particularly important in late S/G(2), where both pathways contribute to repair and radioresistance. In contrast to DSBs produced by ionizing radiation, DSBs produced by the replication inhibitor aphidicolin are repaired entirely by HR. irs1SF, but not V3, cells show hypersensitivity to aphidicolin treatment. These data provide the first evaluation of the cell cycle-specific contributions of NHEJ and HR to the repair of radiation-induced versus replication-associated DSBs.
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Cites
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Self-citationChromosomal stability and the DNA double-stranded break connection
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Cited by
Mechanisms of DNA damage, repair, and mutagenesis
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γH2AX: a sensitive molecular marker of DNA damage and repair
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Therapeutic genome editing: prospects and challenges
Cox, D. B. T., Platt, R. J., & Zhang, F. (2015) · Nature Medicine · doi:10.1038/nm.3793 · Cited by 1,336
ATM- and cell cycle-dependent regulation of ATR in response to DNA double-strand breaks
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Metadata
- Authors
- Rothkamm, K., Krüger, I., Thompson, L. H., & Lübrich, M.
- Venue
- Molecular and Cellular Biology
- Publisher
- Informa UK Limited
- Published
- 2003-08-01
- Volume
- 23
- Issue
- 16
- Pages
- 5706-5715
- ISSN
- 0270-7306 (ISSN-L)
- 1098-5549
- OpenAlex
- W2099627146
- Cited by
- 1,189
- References
- 9
- FWCI
- 16.19
- Type
- journal article
- Language
- en
- Open access
- green
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- Rothkamm, K., Krüger, I., Thompson, L. H., & Lübrich, M. (2003). Pathways of DNA Double-Strand Break Repair during the Mammalian Cell Cycle. Molecular and Cellular Biology. https://doi.org/10.1128/mcb.23.16.5706-5715.2003
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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