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Automated Measurement of Pulmonary Emphysema and Small Airway Remodeling in Cigarette Smoke-exposed Mice
Published on: January 16, 2015
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Scale dependence of structure-function relationship in the emphysematous mouse lung.
Susumu Sato1, Erzsébet Bartolák-Suki2, Harikrishnan Parameswaran2
1Department of Biomedical Engineering, Boston University Boston, MA, USA ; Department of Respiratory Medicine, Kyoto University Hospital Kyoto, Japan.
Frontiers in Physiology
|June 2, 2015
Summary
The initial distribution of porcine pancreatic elastase (PPE) in mouse lungs drives emphysema progression. Microscale structural changes, not just overall damage, significantly impact lung function and compliance.
Area of Science:
- Pulmonary Medicine
- Respiratory Physiology
- Pathology
Background:
- Emphysema involves lung tissue destruction and altered lung function.
- Understanding the relationship between initial damage distribution and disease progression is crucial.
Purpose of the Study:
- To investigate how initial elastase distribution affects emphysema development over time.
- To determine the influence of structural heterogeneity at various scales on lung function.
Main Methods:
- C57BL/6 mice were treated with porcine pancreatic elastase (PPE) and assessed at 2 and 21 days.
- Initial elastase distribution was visualized using fluorescently labeled PPE (f-PPE).
- Lung function (compliance) and alveolar structure (airspace diameter) were measured.
Main Results:
- Elastase treatment led to enlarged airspaces and increased heterogeneity by day 21.
- Initial f-PPE deposition was more heterogeneous than regional airspace diameters.
- Microscale heterogeneity strongly correlated with lung compliance.
Conclusions:
- Initial elastase distribution significantly influences emphysema's time course and severity.
- Microscale structural heterogeneity is a key determinant of lung function decline in emphysema.
- Findings may aid in interpreting lung function changes in human emphysema patients.
