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Related Concept Videos

Asthma I: Introduction01:28

Asthma I: Introduction

Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
Asthma-I: Introduction01:29

Asthma-I: Introduction

Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
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...
Asthma-III: Symptoms and Complications01:24

Asthma-III: Symptoms and Complications

Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma

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Related Experiment Video

Updated: Jun 4, 2026

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters
05:18

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Published on: July 12, 2024

Environmental pollution and asthma.

L Di Giampaolo1, C Quecchia, C Schiavone

  • 1Immunotoxicology and Allergy Unit, Ageing Research Center, University of Chieti Foundation, Chieti, Italy. m.digioacchino@unich.it

International Journal of Immunopathology and Pharmacology
|February 19, 2011
PubMed
Summary
This summary is machine-generated.

Air pollution, including diesel exhaust particles and ozone, exacerbates respiratory allergies and asthma by promoting allergic sensitization and airway inflammation. Exposure to pollutants triggers asthma attacks and long-term lung function decline.

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Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
08:17

Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure

Published on: August 25, 2017

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Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters
05:18

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Published on: July 12, 2024

Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
08:17

Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure

Published on: August 25, 2017

Area of Science:

  • Environmental Science
  • Pulmonology
  • Immunology

Background:

  • Rising global rates of respiratory allergies and asthma correlate with increased pollution exposure.
  • Asthma is a complex disease resulting from genetic and environmental interactions, with various phenotypes.
  • Pollutants like diesel exhaust particles (DEP) and ozone (O3) significantly impact respiratory health.

Purpose of the Study:

  • To examine the role of environmental pollutants in allergic sensitization and asthma development.
  • To elucidate the mechanisms by which pollutants like DEP and O3 trigger asthma exacerbations.
  • To understand the impact of particulate matter on airway inflammation and remodeling.

Main Methods:

  • Review of clinical evidence and epidemiological studies on pollution and respiratory diseases.
  • Analysis of the immunological effects of diesel exhaust particles on immune cells.
  • Examination of ozone's photochemical synthesis and its correlation with asthma hospital admissions.

Main Results:

  • Diesel exhaust particles (DEP) promote allergic sensitization by influencing B and T cell responses (IgE and Th2 cytokines).
  • Ozone (O3), a potent oxidant, is linked to increased hospital visits for acute asthma and bronchodilator use.
  • Fine particulate matter penetrates deep into the airways, causing inflammation, edema, and bronchial lumen narrowing, leading to airway remodeling and reduced lung function.

Conclusions:

  • Pollutants like DEP and O3 are significant environmental triggers for asthma and allergic respiratory diseases.
  • Particulate matter plays a critical role in both acute asthma exacerbations and long-term respiratory functional decline.
  • Understanding these pollutant-induced mechanisms is crucial for developing strategies to mitigate asthma prevalence and severity.