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Updated: Apr 19, 2026

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Ezh2 represses the basal cell lineage during lung endoderm development.

Melinda E Snitow1, Shanru Li2, Michael P Morley2

  • 1Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, PA 19104, USA.

Development (Cambridge, England)
|December 18, 2014
PubMed
Summary

Polycomb repressive complex 2 component Ezh2 restricts basal cell lineage during lung development. Loss of Ezh2 causes premature basal cell appearance and disrupts secretory cell differentiation, impacting lung epithelial patterning.

Keywords:
Basal cellEndodermLungMouse

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Area of Science:

  • Developmental biology
  • Epigenetics
  • Cell lineage specification

Background:

  • Lung epithelium development involves stepwise differentiation into diverse cell types.
  • Epigenetic regulation is crucial for spatially and temporally controlled lineage generation.
  • The role of Polycomb repressive complex 2 (PRC2) in lung development is not fully understood.

Purpose of the Study:

  • To investigate the role of Ezh2, a PRC2 component, in regulating lung endoderm progenitor differentiation.
  • To understand how Ezh2 influences the balance between basal and secretory cell lineages during lung formation.

Main Methods:

  • Analysis of Ezh2 expression patterns during lung development.
  • Conditional deletion of Ezh2 in early lung endoderm progenitors.
  • Histological and molecular characterization of lung epithelial cells post-Ezh2 deletion.

Main Results:

  • Ezh2 is downregulated during late lung gestation.
  • Ezh2 deletion leads to ectopic and premature Trp63+ basal cells throughout the airway.
  • Loss of Ezh2 impairs secretory cell differentiation and promotes a basal-like cell phenotype.

Conclusions:

  • Ezh2 acts as a critical regulator, restricting the basal cell lineage during lung development.
  • Ezh2 is essential for the proper spatial and temporal patterning of lung epithelial lineages.
  • Ezh2 controls the phenotypic switch between basal and secretory cell fates in the developing lung.