期刊
CYTOMETRY PART A
卷 81A, 期 10, 页码 922-928出版社
WILEY
DOI: 10.1002/cyto.a.22155
关键词
flow cytometry; replication protein A; DNA damage; DNA replication; DNA repair; homologous recombination; DNA-End resection
资金
- Cancer Research UK Program [C6/A11224]
- European Research Council
- European Community's Seventh Framework Programme (DDResponse)
- Cancer Research UK
- Wellcome Trust
- ISAC
- University of Cambridge (Cancer Research UK)
- Cancer Research UK [11224] Funding Source: researchfish
Replication protein A (RPA) is an essential trimeric protein complex that binds to single-stranded DNA (ssDNA) in eukaryotic cells and is involved in various aspects of cellular DNA metabolism, including replication and repair. Although RPA is ubiquitously expressed throughout the cell cycle, it localizes to DNA replication forks during S phase, and is recruited to sites of DNA damage when regions of ssDNA are exposed. During DNA double-strand break (DSB) repair by homologous recombination (HR), RPA recruitment to DNA damage sites depends on a process termed DNA-end resection. Consequently, RPA recruitment to sub-nuclear regions bearing DSBs has been used as readout for resection and for ongoing HR. Quantification of RPA recruitment by immunofluorescence-based microscopy techniques is time consuming and requires extensive image analysis of relatively small populations of cells. Here, we present a high-throughput flow-cytometry method that allows the use of RPA staining to measure cell proliferation and DNA-damage repair by HR in an unprecedented, unbiased and quantitative manner. (C) 2012 International Society for Advancement of Cytometry
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