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Updated: Aug 7, 2025

Single-channel Analysis and Calcium Imaging in the Podocytes of the Freshly Isolated Glomeruli
Published on: June 27, 2015
PAI-1 regulates AT2-mediated re-alveolarization and ion permeability
Gibran Ali1, Mo Zhang1,2, Jianjun Chang1
1Department of Cellular and Molecular Biology, University of Texas at Tyler Health Science Center, Tyler, TX, USA.
Elevated plasminogen activator inhibitor-1 (PAI-1) in acute lung injury impairs alveolar epithelial regeneration by reducing self-renewal of alveolar type 2 (AT2) cells, especially CD44+ cells.
Area of Science:
- Pulmonary Medicine
- Regenerative Medicine
- Cell Biology
Background:
- Acute lung injury is marked by high levels of plasminogen activator inhibitor-1 (PAI-1) in lung fluid and circulation.
- The precise role of PAI-1 in the regeneration of injured lung epithelium remains unclear.
- This study investigates the impact of Serpine1 (encoding PAI-1) on alveolar type 2 (AT2) cell fate.
Conclusions:
- Elevated PAI-1 in injured lungs downregulates alveolar epithelial regeneration.
- PAI-1 reduces AT2 cell self-renewal capacity, with a notable impact on the CD44+ subpopulation.
- These findings highlight PAI-1 as a critical regulator of lung epithelial repair.
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