Related Experiment Videos
Alveolar wall apoptosis causes lung destruction and emphysematous changes
Kazutetsu Aoshiba1, Naoko Yokohori, Atsushi Nagai
1First Department of Medicine, Tokyo Women's Medical University, Japan. kaoshiba@chi.twmu.ac.jp
American Journal of Respiratory Cell and Molecular Biology
|April 23, 2003
Summary
This study demonstrates that inducing apoptosis in lung cells causes emphysema in mice. This research confirms apoptosis as a cause of emphysema and offers a new method for lung tissue protein transfection.
Area of Science:
- Pulmonary Medicine
- Cell Biology
- Biochemistry
Background:
- Pulmonary emphysema involves alveolar wall destruction and airspace enlargement.
- Epithelial or endothelial apoptosis is implicated in emphysema pathogenesis.
Purpose of the Study:
- To investigate the direct causal role of apoptosis in emphysema development.
- To establish a murine model for emphysema induced by apoptosis.
- To demonstrate a novel protein transfection technique for lung tissue.
Main Methods:
- Induction of emphysematous changes in mice via single intratracheal injection of active caspase-3 and Chariot (protein transfection reagent).
- Administration of nodularin, a proapoptotic serine/threonine kinase inhibitor, via intratracheal injection.
- Analysis of bronchoalveolar lavage for epithelial apoptosis and elastolytic activity.
Main Results:
- Intratracheal injection of active caspase-3 and Chariot induced emphysematous changes, including airspace enlargement and alveolar wall destruction.
- Epithelial apoptosis and enhanced elastolytic activity were observed in bronchoalveolar lavage fluid.
- Nodularin administration also resulted in emphysematous changes in mice.
- The study successfully created a murine model confirming apoptosis as a cause of emphysema.
Conclusions:
- Alveolar wall apoptosis directly causes emphysematous changes.
- This study provides direct evidence confirming the role of apoptosis in emphysema pathogenesis.
- The developed protein transfection technique offers a simple and versatile tool for future lung tissue research.