Cited by 289Genomics, phytochemicals, and oxidative stressBRCA gene mutations in cancerRedox biology and oxidative stress

BRCA1 interacts with Nrf2 to regulate antioxidant signaling and cell survival

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Gorrini, Chiara, Baniasadi, Pegah S., Harris, Isaac S., Silvester, Jennifer, Inoue, Satoshi, Snow, Bryan, Joshi, Purna A., Wakeham, Andrew +15 more·2013·Journal of Experimental Medicine

Abstract

Oxidative stress plays an important role in cancer development and treatment. Recent data implicate the tumor suppressor BRCA1 in regulating oxidative stress, but the molecular mechanism and the impact in BRCA1-associated tumorigenesis remain unclear. Here, we show that BRCA1 regulates Nrf2-dependent antioxidant signaling by physically interacting with Nrf2 and promoting its stability and activation. BRCA1-deficient mouse primary mammary epithelial cells show low expression of Nrf2-regulated antioxidant enzymes and accumulate reactive oxygen species (ROS) that impair survival in vivo. Increased Nrf2 activation rescues survival and ROS levels in BRCA1-null cells. Interestingly, 53BP1 inactivation, which has been shown to alleviate several defects associated with BRCA1 loss, rescues survival of BRCA1-null cells without restoring ROS levels. We demonstrate that estrogen treatment partially restores Nrf2 levels in the absence of BRCA1. Our data suggest that Nrf2-regulated antioxidant response plays a crucial role in controlling survival downstream of BRCA1 loss. The ability of estrogen to induce Nrf2 posits an involvement of an estrogen-Nrf2 connection in BRCA1 tumor suppression. Lastly, BRCA1-mutated tumors retain a defective antioxidant response that increases the sensitivity to oxidative stress. In conclusion, the role of BRCA1 in regulating Nrf2 activity suggests important implications for both the etiology and treatment of BRCA1-related cancers.

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Crossref · 10.1084/jem.20121337

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  • Estrogen stimulation of breast cancer cells that do not express BRCA1 and suffer from high intracellular ROS levels rescues NRF2 transcription, enhancing survival of these cancer cells.

    “Interestingly, estrogen stimulation of breast cancer cells that do not express BRCA1 and, as a result, suffer from high intracellular ROS levels rescues NRF2 transcription, enhancing the survival of these cancer cells64.”

    From ROS in cancer therapy: the bright side of the moon (2020) · cites this paper as [64]

    The Results section, “Estrogen induces an Nrf2-dependent antioxidant response” (page unavailable), reports that estradiol increased NRF2 protein and NRF2-target gene expression in MCF7 breast cancer cells, and restored Nrf2 protein in BRCA1-deleted mammary epithelial cells. It does not show this combined effect in BRCA1-deficient breast cancer cells or demonstrate that estradiol improved their survival. It also reports no change in NRF2 mRNA in the treated MCF7 cells, so the claim is unsupported if “NRF2 transcription” means transcription of the NRF2 gene. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • ProTα interacts with the Kelch domain of Keap1 and shuttles it into the nucleus, thereby preventing its association with Nrf2.

    “ProTα interacts with the Kelch domain of Keap1 and shuttles it into the nucleus, thereby preventing its association with Nrf2 [82].”
  • The BRCT domain of BRCA1 interacts with the ETGE motif in the Neh2 domain of Nrf2, which inhibits Keap1-mediated ubiquitination and increases the response to oxidative stress.

    “The BRCT domain of BRCA1 interacts with the ETGE motif in the Neh2 domain of Nrf2, which inhibits Keap1-mediated ubiquitination and increases the response to oxidative stress [82,83].”

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Authors
Gorrini, C., Baniasadi, P. S., Harris, I. S., Silvester, J., Inoue, S., Snow, B., Joshi, P. A., Wakeham, A., Molyneux, S. D., Martin, B., Bouwman, P., Cescon, D. W., Elia, A. J., Winterton-Perks, Z., Cruickshank, J., Brenner, D., Tseng, A., Musgrave, M., Berman, H. K., Khokha, R., Jonkers, J., Mak, T. W., & Gauthier, M. L.
Affiliations
  • University Health Network (CA)
  • St. Michael's Hospital (CA)
  • The Netherlands Cancer Institute (NL)
Corresponding author
  • Mak, Tak W.
  • Gauthier, Mona L.
Venue
Journal of Experimental Medicine
Published
2013-07-15
Volume
210
Issue
8
Pages
1529-1544
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2150140277
Cited by
289
References
71
Citations by year
2026: 6 · 2025: 17 · 2024: 19 · 2023: 23 · 2022: 28 · 2021: 31 · 2020: 26 · 2019: 37 · 2018: 19 · 2017: 14 · 2016: 24 · 2015: 22 · 2014: 19 · 2013: 4
FWCI
10.29
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • Leiden Repository (Leiden University) (submittedVersion, cc-by-sa)
  • mediaTUM (Technical University of Munich) (submittedVersion)
Funders
  • Ohio State University
  • Ottawa Hospital Research Institute
  • Canadian Institutes of Health Research
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics, phytochemicals, and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › BRCA gene mutations in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
BRCA1, Nrf2, antioxidant signaling, oxidative stress, reactive oxygen species, protein-protein interaction, protein stability, 53BP1, mammary epithelial cells, estrogen, tumor suppression, cell survival
MeSH terms
Animals, Antioxidants, Breast Neoplasms, Cell Line, Cell Survival, Cell Transformation, Neoplastic, Epithelial Cells, Estrogens, Female, Humans, Mammary Glands, Animal, Mutation, Protein Binding, Signal Transduction, Gene Expression Regulation, Neoplastic, NAD(P)H Dehydrogenase (Quinone), Reactive Oxygen Species, Oxidative Stress, BRCA1 Protein, NF-E2-Related Factor 2, Mice, Ubiquitination, Protein Stability, Gene Knockout Techniques

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