alexa Distal airway stem cells yield alveoli in vitro and during lung regeneration following H1N1 influenza infection.
Pulmonology

Pulmonology

Journal of Clinical Respiratory Diseases and Care

Author(s): Kumar PA, Hu Y, Yamamoto Y, Hoe NB, Wei TS,

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Abstract The extent of lung regeneration following catastrophic damage and the potential role of adult stem cells in such a process remains obscure. Sublethal infection of mice with an H1N1 influenza virus related to that of the 1918 pandemic triggers massive airway damage followed by apparent regeneration. We show here that p63-expressing stem cells in the bronchiolar epithelium undergo rapid proliferation after infection and radiate to interbronchiolar regions of alveolar ablation. Once there, these cells assemble into discrete, Krt5+ pods and initiate expression of markers typical of alveoli. Gene expression profiles of these pods suggest that they are intermediates in the reconstitution of the alveolar-capillary network eradicated by viral infection. The dynamics of this p63-expressing stem cell in lung regeneration mirrors our parallel finding that defined pedigrees of human distal airway stem cells assemble alveoli-like structures in vitro and suggests new therapeutic avenues to acute and chronic airway disease. Copyright © 2011 Elsevier Inc. All rights reserved.
This article was published in Cell and referenced in Journal of Clinical Respiratory Diseases and Care

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