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Related Concept Videos

Other Pulmonary Disorders01:17

Other Pulmonary Disorders

Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
Chronic Obstructive Pulmonary Disease I: Introduction01:23

Chronic Obstructive Pulmonary Disease I: Introduction

Chronic obstructive pulmonary disease is a common, preventable, and treatable respiratory disorder characterized by persistent symptoms and progressive airflow limitation. This limitation results from a combination of small-airway disease (obstructive bronchiolitis) and parenchymal destruction (emphysema), both driven by chronic inflammation from exposure to harmful particles or gases.The disease includes two main pathological entities: emphysema, marked by destruction of alveolar walls and...
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.
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...
Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Obstructive Pulmonary Disease-I: Introduction01:20

Chronic Obstructive Pulmonary Disease-I: Introduction

Chronic Obstructive Pulmonary Disease (COPD) is a long-lasting respiratory condition requiring continuous attention and care. It is a progressive lung disease that leads to breathing challenges due to airflow obstruction. It manifests as persistent respiratory symptoms and restricted airflow resulting from abnormalities in the airways and alveoli, usually due to long-term exposure to harmful particles or gases. COPD mainly consists of two primary conditions: emphysema and chronic bronchitis.

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Related Experiment Video

Updated: Jun 18, 2026

Cigarette Smoke Exposure in Mice using a Whole-Body Inhalation System
06:07

Cigarette Smoke Exposure in Mice using a Whole-Body Inhalation System

Published on: October 22, 2020

Smoking-related lung disease.

Jeffrey R Galvin1, Teri J Franks

  • 1Department of Diagnostic Radiology and Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA. jgalvin@mac.com

Journal of Thoracic Imaging
|November 26, 2009
PubMed
Summary

Cigarette smoking causes lung inflammation and fibrosis, including emphysema and Langerhans

Area of Science:

  • Pulmonary Medicine
  • Pathology
  • Toxicology

Background:

  • Cigarette smoking is a major cause of lung disease.
  • Smokers present with diverse lung pathologies, including emphysema, inflammation, and fibrosis.
  • Pulmonary Langerhans' cell histiocytosis is also observed in smokers.

Purpose of the Study:

  • To elucidate the interconnected pathways leading to lung inflammation and fibrosis in cigarette smokers.
  • To understand the varying combinations of emphysema, airway inflammation, and fibrosis in dyspneic smokers.
  • To explore the link between cigarette smoke and alveolar wall fibrosis.

Main Methods:

  • Clinical observation of dyspneic smokers.
  • Histopathological analysis of lung tissue.

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Isolation of Mouse Respiratory Epithelial Cells and Exposure to Experimental Cigarette Smoke at Air Liquid Interface

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Cigarette Smoke Exposure in Mice using a Whole-Body Inhalation System
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  • Review of emerging research on smoking-related lung diseases.

    • Main Results:

    • Dyspneic smokers exhibit varied combinations of emphysema, airway inflammation, and fibrosis.
    • A link between cigarette smoke and alveolar wall fibrosis is increasingly recognized.
    • Acute eosinophilic pneumonia is a rare but dramatic response to recent smoking.

    Conclusions:

    • The pathways driving lung inflammation and fibrosis in smokers are complex and interconnected.
    • Understanding these pathways is crucial for managing smoking-related lung diseases.
    • Further research is needed to fully unravel the mechanisms involved.