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Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...
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Chronic Obstructive Pulmonary Disease II: Emphysema01:23

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Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.
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Chronic Obstructive Pulmonary Disease, or COPD, is a long-term condition marked by persistent and only partially reversible airflow limitation. It involves two overlapping conditions—chronic bronchitis and emphysema—which often co-appear but differ in dominant symptoms and underlying mechanisms.Chronic Bronchitis FeaturesChronic bronchitis presents with a persistent productive cough and thick, sometimes purulent mucus due to airway inflammation, enlarged mucus glands, and goblet...
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COPD is defined as a heterogeneous lung condition marked by persistent respiratory symptoms such as dyspnea, cough, and sputum production, caused by abnormalities in the airways that cause airflow obstruction.
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Pulmonary vascular changes in asthma and COPD.

Louise M Harkness1, Varsha Kanabar2, Hari S Sharma3

  • 1Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, Australia.

Pulmonary Pharmacology & Therapeutics
|October 16, 2014
PubMed
Summary

Chronic lung diseases like asthma and COPD involve increased blood vessel growth and changes in lung circulation. This review explores the cells, growth factors, and potential treatments involved in these vascular alterations.

Keywords:
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Area of Science:

  • Pulmonary medicine
  • Vascular biology
  • Respiratory diseases

Background:

  • Chronic lung disorders, including asthma and chronic obstructive pulmonary disease (COPD), exhibit significant vascular changes.
  • These changes include increased bronchial angiogenesis and pulmonary vessel remodeling, leading to altered circulation.

Purpose of the Study:

  • To review the regulatory abnormalities, growth factors, and mediators involved in pulmonary vascular changes in asthma and COPD.
  • To identify potential therapeutic targets for these vascular alterations.

Main Methods:

  • Literature review of studies on pulmonary vascular changes in asthma and COPD.
  • Analysis of the roles of residential cells (endothelial cells, smooth muscle cells, fibroblasts) in vascular inflammation and remodeling.
  • Examination of growth factors and mediators implicated in vascular alterations.

Main Results:

  • Endothelial cells, smooth muscle cells, and pulmonary fibroblasts play critical roles in vascular inflammation and remodeling.
  • Specific growth factors and mediators are implicated in the altered pulmonary circulation observed in asthma and COPD.
  • Understanding these mechanisms highlights potential avenues for therapeutic intervention.

Conclusions:

  • Pulmonary vascular changes are a key feature of asthma and COPD pathogenesis.
  • Targeting the identified regulatory pathways and mediators offers potential therapeutic strategies.
  • Further research into these vascular mechanisms could lead to improved treatments for chronic lung diseases.