Cited by 1,001DNA Repair MechanismsBRCA gene mutations in cancerPARP inhibition in cancer therapy

53BP1 loss rescues BRCA1 deficiency and is associated with triple-negative and BRCA-mutated breast cancers

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Bouwman, Peter, Aly, Amal, Escandell, Jose M, Pieterse, Mark, Bartkova, Jirina, van der Gulden, Hanneke, Hiddingh, Sanne, Thanasoula, Maria +12 more·2010·Nature Structural & Molecular Biology

Abstract

Germ-line mutations in breast cancer 1, early onset (BRCA1) result in predisposition to breast and ovarian cancer. BRCA1-mutated tumors show genomic instability, mainly as a consequence of impaired recombinatorial DNA repair. Here we identify p53-binding protein 1 (53BP1) as an essential factor for sustaining the growth arrest induced by Brca1 deletion. Depletion of 53BP1 abrogates the ATM-dependent checkpoint response and G2 cell-cycle arrest triggered by the accumulation of DNA breaks in Brca1-deleted cells. This effect of 53BP1 is specific to BRCA1 function, as 53BP1 depletion did not alleviate proliferation arrest or checkpoint responses in Brca2-deleted cells. Notably, loss of 53BP1 partially restores the homologous-recombination defect of Brca1-deleted cells and reverts their hypersensitivity to DNA-damaging agents. We find reduced 53BP1 expression in subsets of sporadic triple-negative and BRCA-associated breast cancers, indicating the potential clinical implications of our findings.

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  • BRCA1-deficient cells have homologous recombination defects due to an overactive nonhomologous end-joining pathway.

    “In particular, BRCA1-deficient cells have defects in homologous recombination due to an overactive nonhomologous end-joining pathway.”
  • Inactivation of 53BP1 restored homologous recombination to BRCA1-deficient cells.

    “Remarkably, inactivation of one of these nonhomologous end-joining factors, 53BP1, restored homologous recombination to BRCA1-deficient cells [76,77].”

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Authors
Bouwman, P., Aly, A., Escandell, J. M., Pieterse, M., Bartkova, J., van der Gulden, H., Hiddingh, S., Thanasoula, M., Kulkarni, A., Yang, Q., Haffty, B. G., Tommiska, J., Blomqvist, C., Drapkin, R., Adams, D. J., Nevanlinna, H., Bartek, J., Tarsounas, M., Ganesan, S., & Jonkers, J.
Affiliations
  • The Netherlands Cancer Institute (NL)
  • Rutgers Cancer Institute (US)
  • Cancer Research UK (GB)
  • Helsinki University Hospital (FI)
  • Dana-Farber Cancer Institute (US)
  • Wellcome Sanger Institute (GB)
Corresponding author
  • Tarsounas, Madalena
  • Ganesan, Shridar
  • Jonkers, Jos
Venue
Nature Structural & Molecular Biology
Published
2010-05-09
Volume
17
Issue
6
Pages
688-695
ISSN
  • 1545-9985 (ISSN-L)
  • 1545-9993
OpenAlex
W2114860131
Cited by
1,001
References
56
Citations by year
2026: 23 · 2025: 43 · 2024: 52 · 2023: 52 · 2022: 70 · 2021: 73 · 2020: 63 · 2019: 60 · 2018: 69 · 2017: 70 · 2016: 65 · 2015: 65 · 2014: 68 · 2013: 95 · 2012: 64
FWCI
29.36
Type
journal article
Language
en
Open access
Locations
  • Nature Structural & Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Leiden Repository (Leiden University) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Funders
  • U.S. Department of Defense
  • Breast Cancer Research Foundation
  • Helsingin ja Uudenmaan Sairaanhoitopiiri
  • Wellcome Trust (082356)
  • Cancer Research UK (A8784, A6997)
  • Breast Cancer Campaign
  • National Research Foundation
  • Danmarks Grundforskningsfond
  • National Cancer Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › BRCA gene mutations in cancer
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
Keywords
53BP1, BRCA1, BRCA1 deficiency, triple-negative breast cancer, homologous recombination, DNA double-strand break repair, G2 cell cycle arrest, genomic instability, transposon mutagenesis screen, DNA repair
MeSH terms
Tumor Suppressor p53-Binding Protein 1, Animals, Breast Neoplasms, Cell Cycle, Chromosomal Proteins, Non-Histone, DNA Damage, DNA Repair, DNA-Binding Proteins, Female, Humans, Mutation, Tumor Cells, Cultured, Mutagenesis, Insertional, Gene Deletion, Mice, Knockout, Drug Resistance, Neoplasm, BRCA1 Protein, Genes, BRCA1, Genes, BRCA2, BRCA2 Protein, Intracellular Signaling Peptides and Proteins, Cell Proliferation, Apoptosis Regulatory Proteins, Mice, Embryonic Stem Cells

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