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Related Concept Videos

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

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...
COPD: Pathogenesis and Clinical Features01:20

COPD: Pathogenesis and Clinical Features

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.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

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Chronic Obstructive Pulmonary Disease II: Emphysema01:23

Chronic Obstructive Pulmonary Disease II: Emphysema

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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Related Experiment Video

Updated: May 27, 2026

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes
08:30

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes

Published on: March 15, 2018

Metabolic syndrome biomarkers predict lung function impairment: a nested case-control study.

Bushra Naveed1, Michael D Weiden, Sophia Kwon

  • 1Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, New York University School of Medicine, New York, NY 10016, USA.

American Journal of Respiratory and Critical Care Medicine
|November 19, 2011
PubMed
Summary

Metabolic syndrome biomarkers like triglycerides, HDL, heart rate, and leptin predict lung function loss after irritant exposure. Elevated amylin, however, appears protective against impaired lung function.

Related Experiment Videos

Last Updated: May 27, 2026

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes
08:30

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes

Published on: March 15, 2018

Area of Science:

  • Environmental Health
  • Pulmonology
  • Metabolic Disease

Background:

  • Cross-sectional studies indicate a link between metabolic syndrome and reduced lung function.
  • Irritant exposure, such as from the World Trade Center dust, can exacerbate lung function decline.

Purpose of the Study:

  • To determine if metabolic syndrome biomarkers are risk factors for diminished lung function following irritant exposure.
  • To assess the predictive value of metabolic biomarkers for lung disease after particulate inhalation.

Main Methods:

  • A nested case-control study involving Fire Department of New York personnel.
  • Analysis of metabolic syndrome biomarkers (e.g., HDL, triglycerides, leptin) within six months of World Trade Center dust exposure.
  • Correlation of biomarkers with subsequent forced expiratory volume in one second (FEV(1)) measurements over 6.5 years.

Main Results:

  • Elevated triglycerides, low HDL, increased heart rate, and high leptin levels were associated with a twofold increased odds of abnormal FEV(1).
  • Elevated amylin levels were associated with an 84% decreased odds of abnormal FEV(1).
  • A multibiomarker model demonstrated a sensitivity of 41% and specificity of 86% for predicting impaired lung function.

Conclusions:

  • Abnormal triglycerides, HDL, elevated heart rate, and leptin are independent risk factors for lung function impairment post-exposure.
  • Elevated amylin is a protective factor against lung function decline.
  • Metabolic biomarkers can predict lung disease risk following particulate inhalation.