Cited by 123Hair Growth and DisordersSkin and Cellular Biology ResearchDevelopmental Biology and Gene Regulation

Endogenous Myc controls mammalian epidermal cell size, hyperproliferation, endoreplication and stem cell amplification

Zanet, Jennifer, Pibre, Sophie, Jacquet, Chantal, Ramirez, Angel, de Alborán, Ignacio Moreno, Gandarillas, Alberto·2005·Journal of Cell Science

Abstract

The transcription factor Myc (c-Myc) plays an important role in cell growth and cell death, yet its physiological function remains unclear. Ectopic activation of Myc has been recently suggested to regulate cell mass, and Drosophila dmyc controls cellular growth and size independently of cell division. By contrast, it has been proposed that in mammals Myc controls cell division and cell number. To gain insights into this debate we have specifically knocked out Myc in epidermis. Myc epidermal knockout mice are viable and their keratinocytes continue to cycle, but they display severe skin defects. The skin is tight and fragile, tears off in areas of mechanical friction and displays impaired wound healing. Steady-state epidermis is thinner, with loss of the proliferative compartment and premature differentiation. Remarkably, keratinocyte cell size, growth and endoreplication are reduced, and stem cell amplification is compromised. The results provide new and direct evidence for a role for endogenous Myc in cellular growth that is required for hyperproliferative cycles and tissue homeostasis.

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Crossref · 10.1242/jcs.02298

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  • Prior findings show that overexpression of c-Myc leads to enhanced SG expansion, while conditional deletion of c-Myc results in decreased SG size, cell proliferation, and sebocyte differentiation.

    “previously reported findings where overexpression of c-Myc led to enhanced SG expansion, while conditional deletion of c-Myc resulted in decreased SG size, cell proliferation, and sebocyte differentiation3, 29, 38, 39.”

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Authors
Zanet, J., Pibre, S., Jacquet, C., Ramirez, A., de Alborán, I. M., & Gandarillas, A.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Epithelial Damage, Repair and Tissue Engineering Program, CIEMAT, Madrid, Spain
  • Centro Nacional de Biotecnologia, CSIC, Madrid, Spain
Corresponding author
Gandarillas, Alberto
Venue
Journal of Cell Science
Published
2005-04-15
Volume
118
Issue
8
Pages
1693-1704
ISSN
  • 0021-9533 (ISSN-L)
  • 1477-9137
OpenAlex
W2101568666
Cited by
123
References
50
Citations by year
2026: 1 · 2025: 6 · 2024: 6 · 2023: 2 · 2022: 3 · 2021: 4 · 2020: 7 · 2019: 6 · 2018: 2 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 6 · 2013: 8 · 2012: 8
FWCI
12.69
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cell Science (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
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 › Developmental Biology and Gene Regulation
Keywords
c-Myc, epidermis, keratinocytes, cell size, cell growth, endoreplication, hyperproliferation, epidermal stem cells, wound healing, skin defects, tissue homeostasis, cell differentiation
MeSH terms
Animals, Cell Cycle, Cell Differentiation, Cell Division, Cell Movement, Epidermis, Female, Homeostasis, Male, Mice, Transgenic, Ploidies, Stem Cells, Stress, Mechanical, Wound Healing, Keratinocytes, Proto-Oncogene Proteins c-myc, Mice, Knockout, Hair Follicle, Cell Size, Cell Enlargement, Cell Proliferation, Mice

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