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Oropharyngeal Administration of Bleomycin in the Murine Model of Pulmonary Fibrosis
Published on: May 9, 2025
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Reducing protein oxidation reverses lung fibrosis.
Vikas Anathy1, Karolyn G Lahue1, David G Chapman2
1Department of Pathology and Laboratory Medicine, University of Vermont, Burlington, VT, USA.
Nature Medicine
|July 11, 2018
Summary
Glutaredoxin-1 (GLRX) activity decreases in lung fibrosis, increasing protein S-glutathionylation (PSSG). Restoring GLRX function therapeutically reduced lung collagen in fibrosis models.
Area of Science:
- Pulmonary Medicine
- Biochemistry
- Molecular Biology
Background:
- Idiopathic pulmonary fibrosis involves excessive collagen deposition and impaired gas exchange.
- Oxidative stress is implicated in fibrosis pathogenesis, but mechanisms are unclear.
- Protein S-glutathionylation (PSSG) is a reversible protein modification regulated by glutaredoxin-1 (GLRX).
Purpose of the Study:
- To investigate the role of GLRX and PSSG in pulmonary fibrosis.
- To explore the therapeutic potential of GLRX in lung fibrosis.
Main Methods:
- Analysis of lung tissues from idiopathic pulmonary fibrosis patients.
- Utilized transgenic mouse models (Glrx-deficient and overexpressing).
- Administered recombinant GLRX to fibrotic mouse airways.
Main Results:
- Reduced GLRX activity and increased PSSG observed in fibrotic lungs.
- Glrx-deficient mice showed increased susceptibility to induced pulmonary fibrosis.
- Overexpression of Glrx attenuated fibrosis; exogenous GLRX reversed collagen deposition.
Conclusions:
- GLRX inactivation and PSSG increase are linked to pulmonary fibrosis.
- Therapeutic administration of GLRX shows potential for treating lung fibrosis.
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