The role of Scgb1a1+ Clara cells in the long-term maintenance and repair of lung airway, but not alveolar, epithelium.
Journal Article (Journal Article)
To directly test the contribution of Scgb1a1(+) Clara cells to postnatal growth, homeostasis, and repair of lung epithelium, we generated a Scgb1a1-CreER "knockin" mouse for lineage-tracing these cells. Under all conditions tested, the majority of Clara cells in the bronchioles both self-renews and generates ciliated cells. In the trachea, Clara cells give rise to ciliated cells but do not self-renew extensively. Nevertheless, they can contribute to tracheal repair. In the postnatal mouse lung, it has been proposed that bronchioalveolar stem cells (BASCs) which coexpress Scgb1a1 (Secretoglobin1a1) and SftpC (Surfactant Protein C), contribute descendants to both bronchioles and alveoli. The putative BASCs were lineage labeled in our studies. However, we find no evidence for the function of a special BASC population during postnatal growth, adult homeostasis, or repair. Rather, our results support a model in which the trachea, bronchioles, and alveoli are maintained by distinct populations of epithelial progenitor cells.
Full Text
Duke Authors
Cited Authors
- Rawlins, EL; Okubo, T; Xue, Y; Brass, DM; Auten, RL; Hasegawa, H; Wang, F; Hogan, BLM
Published Date
- June 5, 2009
Published In
Volume / Issue
- 4 / 6
Start / End Page
- 525 - 534
PubMed ID
- 19497281
Pubmed Central ID
- PMC2730729
Electronic International Standard Serial Number (EISSN)
- 1875-9777
Digital Object Identifier (DOI)
- 10.1016/j.stem.2009.04.002
Language
- eng
Conference Location
- United States