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Related Experiment Video

Updated: Feb 14, 2026

Open Tracheostomy Gastric Acid Aspiration Murine Model of Acute Lung Injury Results in Maximal Acute Nonlethal Lung Injury
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A Conserved Distal Lung Regenerative Pathway in Acute Lung Injury.

Martin S Taylor1, Raghu R Chivukula2, Laura C Myers2

  • 1Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts.

The American Journal of Pathology
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Insights from mouse lung regeneration models are being applied to human acute lung injury. This study identifies a novel pattern in severe human lung injury, termed diffuse alveolar injury with delayed epithelization, and links it to mouse models.

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Area of Science:

  • Pulmonary Medicine
  • Regenerative Medicine
  • Pathology

Background:

  • Understanding lung regeneration in mice has advanced significantly.
  • Translating these findings to human acute lung injury (ALI) remains a challenge.
  • Severe ALI in humans often requires advanced life support like extracorporeal membrane oxygenation (ECMO).

Purpose of the Study:

  • To investigate the relevance of murine lung regeneration insights to human ALI.
  • To characterize pathological findings in severe human ALI cases.
  • To identify potential correlates between human ALI and animal models.

Main Methods:

  • Detailed case reports of two young adults with fulminant idiopathic ALI requiring ECMO.
  • Histopathological analysis of lung biopsy specimens.
  • Comparison of findings with 57 historical cases of diffuse alveolar damage (DAD).

Main Results:

  • Two severe ALI cases showed diffuse alveolar injury with markedly reduced alveolar epithelial regeneration and abundant macrophages.
  • This pattern was termed diffuse alveolar injury with delayed epithelization (DADIE).
  • Peribronchiolar basaloid pods and ciliated bronchiolarization, seen in mouse models, were identified in these patients and 39% of historical DAD cases.

Conclusions:

  • DADIE represents a clinically significant human correlate for severe ALI observed in murine models.
  • Peribronchiolar basaloid pods and bronchiolarization likely represent sequential stages of distal airway injury response.
  • Findings bridge the gap between mouse lung regeneration research and human ALI pathology.