Wounding induces dedifferentiation of epidermal Gata6 + cells and acquisition of stem cell properties

Nat Cell Biol. 2017 Jun;19(6):603-613. doi: 10.1038/ncb3532. Epub 2017 May 15.

Abstract

The epidermis is maintained by multiple stem cell populations whose progeny differentiate along diverse, and spatially distinct, lineages. Here we show that the transcription factor Gata6 controls the identity of the previously uncharacterized sebaceous duct (SD) lineage and identify the Gata6 downstream transcription factor network that specifies a lineage switch between sebocytes and SD cells. During wound healing differentiated Gata6+ cells migrate from the SD into the interfollicular epidermis and dedifferentiate, acquiring the ability to undergo long-term self-renewal and differentiate into a much wider range of epidermal lineages than in undamaged tissue. Our data not only demonstrate that the structural and functional complexity of the junctional zone is regulated by Gata6, but also reveal that dedifferentiation is a previously unrecognized property of post-mitotic, terminally differentiated cells that have lost contact with the basement membrane. This resolves the long-standing debate about the contribution of terminally differentiated cells to epidermal wound repair.

Publication types

  • Video-Audio Media

MeSH terms

  • Animals
  • Cell Dedifferentiation*
  • Cell Lineage
  • Cell Movement
  • Cell Plasticity
  • Cell Self Renewal
  • Cells, Cultured
  • Disease Models, Animal
  • Epidermis / metabolism*
  • Epidermis / pathology
  • Female
  • GATA6 Transcription Factor / deficiency
  • GATA6 Transcription Factor / genetics
  • GATA6 Transcription Factor / metabolism*
  • Male
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Phenotype
  • Positive Regulatory Domain I-Binding Factor 1
  • Sebaceous Glands / metabolism*
  • Sebaceous Glands / pathology
  • Signal Transduction
  • Stem Cells / metabolism*
  • Time Factors
  • Transcription Factors / genetics
  • Transcription Factors / metabolism
  • Wound Healing*
  • Wounds and Injuries / genetics
  • Wounds and Injuries / metabolism*
  • Wounds and Injuries / pathology

Substances

  • GATA6 Transcription Factor
  • Gata6 protein, mouse
  • Prdm1 protein, mouse
  • Transcription Factors
  • Positive Regulatory Domain I-Binding Factor 1