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Related Concept Videos

COPD: Pathogenesis and Clinical Features01:20

COPD: Pathogenesis and Clinical Features

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Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
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COPD: Management Using Bronchodilators and Corticosteroids01:26

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Chronic obstructive pulmonary isease (COPD) involves a group of progressive lung disorders characterized by persistent airflow limitation and chronic respiratory symptoms. Asthma-COPD Overlap Syndrome (ACOS), encompassing features of both asthma and Chronic obstructive pulmonary disease (COPD), is a group of progressive lung disorders that includes chronic bronchitis, emphysema, and refractory (non-reversible) asthma. ACOS leads to complex clinical presentations that combine the inflammatory...
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Inflammatory Response01:28

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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

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The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
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Inflammatory Response I: Vascular and Cellular01:30

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The inflammatory response is the body's defense against infection, injury, or irritation from bacteria, trauma, toxins, or heat. Inflammation helps locate and destroy pathogens and remove damaged tissue elements to heal the body. During this initial phase, fluid, blood products, and nutrients migrate to the injured area, resulting in redness, heat, swelling, ache, and loss of function. Moreover, signs of systemic inflammation include fever, increased WBC count, malaise, anorexia, nausea,...
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Related Experiment Video

Updated: Jan 28, 2026

On-Chip Endothelial Inflammatory Phenotyping
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Inflammatory endotypes in COPD.

Peter J Barnes1

  • 1National Heart and Lung Institute, Imperial College, London, UK.

Allergy
|March 6, 2019
PubMed
Summary
This summary is machine-generated.

Chronic obstructive pulmonary disease (COPD) treatment is challenging due to corticosteroid-resistant inflammation. Identifying specific inflammatory endotypes, like eosinophilic COPD, is crucial for predicting treatment responses and developing precision medicines.

Keywords:
asthma-COPD overlapeosinophilexacerbationsinterleukin-5macrophageneutrophil

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Area of Science:

  • Pulmonary Medicine
  • Inflammation Research
  • Genetics

Background:

  • Chronic obstructive pulmonary disease (COPD) is a significant global health issue with limited effective treatments.
  • Current therapies struggle to address the underlying corticosteroid-resistant inflammation in most COPD patients.
  • Despite clinical heterogeneity, identifying distinct inflammatory endotypes in COPD remains difficult.

Purpose of the Study:

  • To investigate the role of inflammatory endotypes in COPD.
  • To explore the association between eosinophils and clinical outcomes in COPD.
  • To understand the potential for precision medicine in COPD treatment.

Main Methods:

  • Analysis of sputum and blood inflammatory markers, including neutrophils, macrophages, and eosinophils.
  • Assessment of interleukin-5 (IL-5) levels in sputum.
  • Correlation of inflammatory profiles with exacerbation frequency and corticosteroid response.

Main Results:

  • Most COPD patients exhibit increased neutrophils and macrophages.
  • A subset of patients shows increased sputum and blood eosinophils, associated with frequent exacerbations.
  • While IL-5 is elevated in some eosinophilic COPD cases, anti-IL-5 therapies have not proven effective in preventing exacerbations.

Conclusions:

  • Eosinophilic COPD may represent an overlap with asthma, but the mechanisms driving eosinophilia require further investigation.
  • Linking specific inflammatory endotypes to clinical manifestations and outcomes is essential for advancing COPD treatment.
  • Further research is needed to predict treatment responses to precision medicines in COPD.