Basal cells are a multipotent progenitor capable of renewing the bronchial epithelium.


Journal Article

Commitment of the pulmonary epithelium to bronchial and bronchiolar airway lineages occurs during the transition from pseudoglandular to cannalicular phases of lung development, suggesting that regional differences exist with respect to the identity of stem and progenitor cells that contribute to epithelial maintenance in adulthood. We previously defined a critical role for Clara cell secretory protein-expressing (CE) cells in renewal of bronchiolar airway epithelium following injury. Even though CE cells are also the principal progenitor for maintenance of the bronchial airway epithelium, CE cell injury is resolved through a mechanism involving recruitment of a second progenitor cell population that we now identify as a GSI-B(4) reactive, cytokeratin-14-expressing basal cell. These cells exhibit multipotent differentiation capacity as assessed by analysis of cellular phenotype within clones of LacZ-tagged cells. Clones were derived from K14-expressing cells tagged in a cell-type-specific fashion by ligand-regulable Cre recombinase-mediated genomic rearrangement of the ROSA26 recombination substrate allele. We conclude that basal cells represent an alternative multipotent progenitor cell population of bronchial airways and that progenitor cell selection is dictated by the type of airway injury.

Full Text

Duke Authors

Cited Authors

  • Hong, KU; Reynolds, SD; Watkins, S; Fuchs, E; Stripp, BR

Published Date

  • February 2004

Published In

Volume / Issue

  • 164 / 2

Start / End Page

  • 577 - 588

PubMed ID

  • 14742263

Pubmed Central ID

  • 14742263

International Standard Serial Number (ISSN)

  • 0002-9440

Digital Object Identifier (DOI)

  • 10.1016/S0002-9440(10)63147-1


  • eng

Conference Location

  • United States