Cited by 247Neonatal Respiratory Health ResearchTissue Engineering and Regenerative MedicineLiver physiology and pathology

Distinct Airway Epithelial Stem Cells Hide among Club Cells but Mobilize to Promote Alveolar Regeneration

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Kathiriya, Jaymin J., Brumwell, Alexis N., Jackson, Julia R., Tang, Xiaodan, Chapman, Harold A.·2020·Cell Stem Cell

Abstract

Lung injury activates specialized adult epithelial progenitors to regenerate the epithelium. Depending on the extent of injury, both remaining alveolar type II cells (AEC2s) and distal airway stem/progenitors mobilize to cover denuded alveoli and restore normal barriers. The major source of airway stem/progenitors other than basal-like cells remains uncertain. Here, we define a distinct subpopulation (∼5%) of club-like lineage-negative epithelial progenitors (LNEPs) marked by high H2-K1 expression critical for alveolar repair. Quiescent H2-K1 high cells account for virtually all in vitro regenerative activity of airway lineages. After bleomycin injury, H2-K1 cells expand and differentiate in vivo to alveolar lineages. However, injured H2-K1 cells eventually develop impaired self-renewal with features of senescence, limiting complete repair. Normal H2-K1 high cells transplanted into injured lungs differentiate into alveolar cells and rescue lung function. These findings indicate that small subpopulations of specialized stem/progenitors are required for effective lung regeneration and are a potential therapeutic adjunct after major lung injury.

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Crossref · 10.1016/j.stem.2019.12.014

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Authors
Kathiriya, J. J., Brumwell, A. N., Jackson, J. R., Tang, X., & Chapman, H. A.
Affiliations
  • University of California, San Francisco (US)
  • Shanghai Medical College of Fudan University (CN)
Corresponding author
Chapman, Harold A.
Venue
Cell Stem Cell
Publisher
Elsevier BV
Published
2020-03
Volume
26
Issue
3
Pages
346-358.e4
ISSN
  • 1875-9777 (ISSN-L)
  • 1934-5909
OpenAlex
W3002314962
Cited by
246
References
46
Citations by year
2026: 26 · 2025: 38 · 2024: 42 · 2023: 48 · 2022: 33 · 2021: 33 · 2020: 26
FWCI
19.70
Type
journal article
Language
en
Open access
Locations
  • Cell stem cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
National Heart, Lung, and Blood Institute
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Neonatal Respiratory Health Research
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
Clara cells, alveolar regeneration, lung injury, alveolar type II cells, epithelial progenitors, cellular senescence, self-renewal, cell transplantation
MeSH terms
Cell Differentiation, Epithelial Cells, Humans, Lung, Stem Cells, Lung Injury, Alveolar Epithelial Cells

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