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Updated: Jul 13, 2026

Evaluation of Keratinocyte Proliferation on Two- and Three-dimensional Type I Collagen Substrates
08:19

Evaluation of Keratinocyte Proliferation on Two- and Three-dimensional Type I Collagen Substrates

Published on: April 22, 2019

The TFIID subunit TAF4 regulates keratinocyte proliferation and has cell-autonomous and non-cell-autonomous tumour

Anas Fadloun1, Dominique Kobi, Jean-Christophe Pointud

  • 1Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, 1 Rue Laurent Fries, 67404 Illkirch Cédex, France.

Development (Cambridge, England)
|July 13, 2007
PubMed

Insights

The TAF4 subunit is crucial for skin development and function. Its loss in mice causes neonatal death, fur loss, and promotes skin tumor development, revealing its role in keratinocyte proliferation and tumor suppression.

Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Dermatology

Background:

  • The TAF4 subunit of transcription factor TFIID plays a role in gene regulation.
  • Keratinocyte function is essential for skin barrier integrity and hair follicle cycling.

Purpose of the Study:

  • To investigate the function of TAF4 in mouse epidermis.
  • To determine the role of TAF4 in skin development, homeostasis, and tumor suppression.

Main Methods:

  • Conditional inactivation of the TAF4 gene in basal keratinocytes of foetal and adult mice.
  • Analysis of skin phenotype, gene expression, and tumor development.

Main Results:

  • TAF4 loss in foetal epidermis impairs skin barrier genes, causing neonatal lethality.
  • TAF4 inactivation in adult epidermis leads to fur loss, aberrant hair cycle, and epidermal hyperplasia.
  • TAF4 deficiency promotes malignant transformation of chemically induced skin tumors and melanocytic tumors.

Conclusions:

  • TAF4 is essential for regulating keratinocyte proliferation and maintaining skin homeostasis.
  • TAF4 exhibits both cell-autonomous and non-cell-autonomous tumor suppressor activities in the epidermis.

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