Cited by 42Hair Growth and DisordersSkin and Cellular Biology Researchdental development and anomalies

BRCA1 deficiency in skin epidermis leads to selective loss of hair follicle stem cells and their progeny

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Sotiropoulou, Panagiota A., Karambelas, Andrea E., Debaugnies, Maud, Candi, Aurelie, Bouwman, Peter, Moers, Virginie, Revenco, Tatiana, Rocha, Ana Sofia +3 more·2013·Genes & Development

Abstract

The accurate maintenance of genomic integrity is essential for tissue homeostasis. Deregulation of this process leads to cancer and aging. BRCA1 is a critical mediator of this process. Here, we performed conditional deletion of Brca1 during epidermal development and found that BRCA1 is specifically required for hair follicle (HF) formation and for development of adult HF stem cells (SCs). Mice deficient for Brca1 in the epidermis are hairless and display a reduced number of HFs that degenerate progressively. Surprisingly, the interfollicular epidermis and the sebaceous glands remain unaffected by Brca1 deletion. Interestingly, HF matrix transient amplifying progenitors present increased DNA damage, p53 stabilization, and caspase-dependent apoptosis compared with the interfollicular and sebaceous progenitors, leading to hyperproliferation, apoptosis, and subsequent depletion of the prospective adult HF SCs. Concomitant deletion of p53 and Brca1 rescues the defect of HF morphogenesis and loss of HF SCs. During adult homeostasis, BRCA1 is dispensable for quiescent bulge SCs, but upon their activation during HF regeneration, Brca1 deletion causes apoptosis and depletion of Brca1-deficient bulge SCs. Our data reveal a major difference in the requirement of BRCA1 between different types of epidermal SCs and progenitors and during the different activation stages of adult HF SCs.

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Authors
Sotiropoulou, P. A., Karambelas, A. E., Debaugnies, M., Candi, A., Bouwman, P., Moers, V., Revenco, T., Rocha, A. S., Sekiguchi, K., Jonkers, J., & Blanpain, C.
Affiliations
  • Université Libre de Bruxelles (BE)
  • The Netherlands Cancer Institute (NL)
  • The University of Osaka (JP)
Venue
Genes & Development
Published
2012-12-27
Volume
27
Issue
1
Pages
39-51
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2124543958
Cited by
42
References
57
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 5 · 2022: 5 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 4 · 2017: 3 · 2016: 4 · 2015: 4 · 2014: 8 · 2013: 1
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion, cc-by-nc)
  • Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion)
  • OUKA (Osaka University Knowledge Archive) (Osaka University) (submittedVersion)
Funders
  • Fonds De La Recherche Scientifique - FNRS
  • Walloon excellence in life sciences and biotechnology
  • Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture
Topics
  • Health Sciences › Medicine › Urology › Hair Growth and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Skin and Cellular Biology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › dental development and anomalies
Keywords
BRCA1, hair follicle stem cells, epidermis, conditional gene deletion, hair follicle morphogenesis, DNA damage, p53, caspase-dependent apoptosis, bulge stem cells, hair follicle regeneration, genome stability, skin homeostasis
MeSH terms
Epidermal Cells, Animals, DNA Damage, Epidermis, Stem Cells, Tumor Suppressor Protein p53, Apoptosis, Gene Deletion, Mice, Knockout, Hair Follicle, BRCA1 Protein, Mice

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