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March 14, 20260 citationsOpen Access

Alveolar-Basal Intermediates Drive Pulmonary Fibrosis in Silicosis

Alveolar-Basal Intermediates Drive Pulmonary Fibrosis via Coordination of a Pro-Fibrotic Signaling Niche in Silicosis

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Population

Genetic model causing transition of AT2 progenitors to a Krt8 high cell state following deletion of the lung…

Design

Preclinical

Key result

Accumulation of alveolar-basal intermediates actively drives severe pulmonary fibrosis after silica-induced lung injury via coordination of a pro-fibrotic signaling niche.

Authors

BZBarbara ZhaoHWHelen Warheit-NiemiKCKathleen C.S. Cook

Discussion

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Overview

Should not yet change clinical practice in pulmonary fibrosis; hypothesis-generating for alveolar-basal intermediate targeting in animal models.

Key Points

  • This research aims to determine whether Krt8 high cells drive pulmonary fibrosis following lung injury.
  • Used a genetic model of AT2 progenitors with Nkx2-1 deletion to assess Krt8 high cell accumulation.
  • Induced lung fibrosis with inhaled silica in an experimental setting.
  • Utilized computational analysis and niche mapping to examine interactions between cells in the fibrotic lung.
  • Krt8 high cells accumulate in alveolar-basal intermediates post-injury, initiating fibrotic signaling pathways.
  • Pro-inflammatory signals from iABI increase matrix deposition by inflammatory alveolar fibroblasts (iAF).
  • iABI interact with iAF and pulmonary osteoclast-like cells (POLC) within fibrotic niches, facilitating widespread fibrosis.

Structured PICO

P
Population
Genetic model causing transition of AT2 progenitors to a Krt8 high cell state following deletion of the lung transcription factor Nkx2-1 specifically in the AT2 progenitor lineage
I
Intervention
Induction of fibrotic lung injury with inhaled silica
O
Outcome
Fibrotic remodeling of the lung and role of alveolar-basal intermediate state (ABI) cellssurrogate

Alveolar-basal intermediate cells actively participate in driving fibrosis after silica-induced lung injury, suggesting their accumulation in fibrotic lung disease is pathogenic.

Cite This Study

Zhao et al. (2026) studied Pulmonary fibrosis and silicosis. Genetic deletion of Nkx2-1 and inhaled silica was evaluated. Accumulation of alveolar-basal intermediates actively drives severe pulmonary fibrosis after silica-induced lung injury via coordination of a pro-fibrotic signaling niche.

synapsesocial.com/papers/6a0cf564216d108c6fcc8f3fhttps://doi.org/10.64898/2026.03.11.711170
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1C29-20 Context-Specific Macrophage Programs in Silica and Bleomycin-Induced Models of Pulmonary Fibrosis2026
  2. 2D95-08 Emergence of Distinct Pathologic Basal Cell Sub-types in Lung Fibrosis Mediated by Senescence2026
  3. 3Differentiation arrest of transitional alveolar epithelial cells drives pulmonary fibrosis2026
  4. 4Deciphering the Pulmonary Fibrosis Niche: A Single-Cell Transcriptomic Perspective on Cellular Crosstalk and Microenvironment Remodeling2026
  5. 5A74-36 Dissecting Early Fibro-inflammatory Pathways in Human Lung Tissue Ex Vivo2026