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Endothelins and pulmonary diseases
1Department of Thoracic Medicine, National Heart and Lung Institute, London, United Kingdom.
Journal of Applied Physiology (Bethesda, Md. : 1985)
|September 1, 1994
Summary
Endothelins (ETs) are key players in lung function and disease. Targeting ET receptors may offer new treatments for pulmonary conditions like asthma and hypertension.
Area of Science:
- Pulmonary Medicine
- Molecular Biology
- Cell Biology
Background:
- Endothelins (ETs) are peptides found in human lung cells, including airway epithelium and vascular cells.
- Increased endothelin-1 (ET-1) expression is observed in pulmonary diseases such as asthma and pulmonary hypertension.
- ET binding sites are present in airway and vascular smooth muscle, glands, and nerves, suggesting broad physiological roles.
Purpose of the Study:
- To investigate the role of endothelins in human airway and pulmonary vascular function.
- To explore the potential therapeutic implications of ET antagonists in pulmonary diseases.
Main Methods:
- The study reviews existing evidence on ET expression, localization, and effects in the human lung.
- Analysis of ET receptor subtypes (ETA and ETB) involved in specific cellular responses.
Main Results:
- ET-1 and ET-3 cause potent constriction of airway smooth muscle, likely via ETB receptors.
- ETs may influence airway function through bronchial vessel constriction, plasma exudation, mucus secretion, and smooth muscle hyperplasia, potentially via ETA receptors.
- ET-1 strongly constricts pulmonary vessels, suggesting ETA receptor predominance, and mediates fibroblast and smooth muscle chemotaxis and mitogenesis.
Conclusions:
- Endothelins play significant roles in human pulmonary physiology and pathophysiology.
- The findings support the potential of endothelin antagonists as a therapeutic strategy for various lung diseases.