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Airway pathology in asthma.
The European Respiratory Journal. Supplement
|October 24, 2002
Summary
Asthma and chronic obstructive pulmonary disease (COPD) share airway thickening but differ in inflammatory cells. COPD involves lung tissue destruction, unlike asthma, contributing to airflow limitation.
Area of Science:
- Pulmonary Medicine
- Pathology
Background:
- Asthma and chronic obstructive pulmonary disease (COPD) are distinct chronic respiratory diseases.
- Both conditions lead to airflow limitation through airway and lung parenchyma changes.
Purpose of the Study:
- To compare cellular and structural changes in asthma and COPD.
- To identify mechanisms contributing to airflow limitation in both diseases.
Main Methods:
- Review of cellular and structural alterations in airways and lung parenchyma.
- Comparative analysis of inflammatory cell infiltration and tissue remodeling.
Main Results:
- Asthma shows eosinophilic airway infiltration; COPD exhibits CD8 T-lymphocytic infiltration.
- COPD involves lung parenchyma inflammation, destruction, and fibrosis; asthma does not.
- Both diseases feature airway wall thickening and inflammation.
Conclusions:
- Distinct inflammatory profiles and structural changes underpin airflow limitation in asthma and COPD.
- Airway wall thickening and parenchymal alterations contribute to increased resistance or decreased driving pressure.