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Pulmonary vascular involvement in chronic obstructive pulmonary disease
1Pulmonary Hypertension Center, Dept of Pathology, University of Colorado, Health Sciences Center, Denver, Colorado, USA. norbert.voelkel@uchsc.edu
The European Respiratory Journal. Supplement
|November 19, 2003
Summary
Chronic obstructive lung disease (COLD) involves lung vasculature, not just airways. Targeting vascular endothelial growth factor (VEGF) and apoptosis pathways shows promise for treating emphysema and pulmonary hypertension in COLD patients.
Area of Science:
- Pulmonary Medicine
- Vascular Biology
- Pathophysiology
Background:
- Chronic obstructive lung disease (COLD) impacts the entire lung, including vasculature.
- Pulmonary hypertension (PH) is recognized in some COLD patients, but its pathophysiology is not fully understood.
- Inflammation and hypercoagulability are associated with COLD exacerbations.
Purpose of the Study:
- To investigate the role of vascular endothelial growth factor (VEGF) and apoptosis in the pathogenesis of emphysema and PH.
- To develop and utilize a rat model to study emphysema and PH.
- To identify potential therapeutic targets for the vascular components of COLD.
Main Methods:
- Examined lung pathology in COLD patients, noting intimal thickening, thrombosis, and capillary loss.
- Utilized a rat model with chronic VEGF receptor blockade to induce emphysema and PH.
- Conducted prevention trials using caspase inhibitors, superoxide dismutase mimetics, and alpha1-antitrypsin.
Main Results:
- VEGF receptor blockade in rats induced septal cell apoptosis, emphysema, and PH.
- Findings highlight the roles of VEGF, apoptosis, oxidative stress, and protease activity in emphysema.
- Demonstrated the significance of vascular changes in a disease traditionally viewed as airway-centric.
Conclusions:
- The vasculature plays a critical role in the pathogenesis of chronic obstructive lung disease.
- Future treatments for COLD must address its vascular complications.
- Targeting VEGF, apoptosis, oxidative stress, and protease activity may offer new therapeutic strategies.