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The Role of Scgb1a1+ Clara Cells in the Long-Term Maintenance and Repair of Lung Airway, but Not Alveolar, Epithelium

Open access
Rawlins, Emma L., Okubo, Tadashi, Xue, Yan, Brass, David M., Auten, Richard L., Hasegawa, Hiroshi, Wang, Fan, Hogan, Brigid L.M.·2009·Cell Stem Cell

Abstract

Summary To directly test the contribution of Scgb1a1+ Clara cells to postnatal growth, homeostasis and repair of lung epithelium, we generated a Scgb1a1-CreERTM “knock-in” mouse line for lineage tracing these cells. Under all conditions tested the majority of Clara cells in the bronchioles both self-renew and generate 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 co-express 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.

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Crossref · 10.1016/j.stem.2009.04.002

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Authors
Rawlins, E. L., Okubo, T., Xue, Y., Brass, D. M., Auten, R. L., Hasegawa, H., Wang, F., & Hogan, B. L. M.
Venue
Cell Stem Cell
Publisher
Elsevier BV
Published
2009-06
Volume
4
Issue
6
Pages
525-534
ISSN
  • 1875-9777 (ISSN-L)
  • 1934-5909
OpenAlex
W2007610579
Cited by
853
References
0
FWCI
37.35
Type
journal article
Language
en
Open access
bronze

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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