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Related Concept Videos

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-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: Introduction01:23

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...

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Related Experiment Video

Updated: May 26, 2026

Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
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Elastase-induced pulmonary emphysema: insights from experimental models.

Mariana A Antunes1, Patricia R M Rocco

  • 1Laboratório de Investigação Pulmonar, Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Brasil.

Anais Da Academia Brasileira De Ciencias
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

Elastase models can mimic some emphysema features but may differ from cigarette smoke-induced disease. Choosing the right emphysema model is crucial for accurate drug testing and research outcomes.

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Area of Science:

  • Pulmonary Medicine
  • Pathology
  • Toxicology

Background:

  • Emphysema is a major cause of death and disability.
  • Cigarette smoke is the primary cause of human emphysema.
  • Current research seeks simpler emphysema models than cigarette smoke exposure.

Purpose of the Study:

  • Compare disease induction mechanisms in smoke vs. elastase emphysema models.
  • Detail variations among different elastase models.
  • Evaluate the pros and cons of elastase-induced emphysema models.

Main Methods:

  • Review of existing literature on emphysema induction models.
  • Comparative analysis of histological and functional features.
  • Assessment of disease pathways in different models.

Main Results:

  • Elastase models reproduce airspace enlargement, inflammation, and systemic inflammation.
  • Significant differences exist in disease pathways between smoke and elastase models.
  • The choice of emphysema model can influence therapeutic research outcomes.

Conclusions:

  • Elastase-induced emphysema models offer a simpler alternative to smoke models but have limitations.
  • Further research is needed to fully elucidate elastase-induced emphysema mechanisms.
  • Careful consideration of model choice is essential for reliable emphysema research.