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Related Concept Videos

Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

1.5K
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.
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Asthma-I: Introduction01:29

Asthma-I: Introduction

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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...
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Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

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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:
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Asthma I: Introduction01:28

Asthma I: Introduction

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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...
112
Asthma III: Clinical Manifestations01:13

Asthma III: Clinical Manifestations

49
Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...
49
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

40
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...
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Related Experiment Video

Updated: May 3, 2026

A Reversible, Non-invasive Method for Airway Resistance Measurements and Bronchoalveolar Lavage Fluid Sampling in Mice
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The irreversible component of persistent asthma.

Rodolfo M Pascual1, Stephen P Peters

  • 1Department of Internal Medicine, Section on Pulmonary, Wake Forest University School of Medicine, Center for Human Genomics, Winston-Salem, NC 27157, USA. rpascual@wfubmc.edu

The Journal of Allergy and Clinical Immunology
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Summary

Some asthma patients develop irreversible airflow obstruction, even early in life. Current asthma treatments do not prevent this complication, highlighting a need for better understanding and new therapeutic approaches.

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Related Experiment Videos

Last Updated: May 3, 2026

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Area of Science:

  • Pulmonary Medicine
  • Respiratory Research
  • Asthma Pathophysiology

Background:

  • Irreversible airflow obstruction is a serious asthma complication.
  • It can manifest early in life and worsens with disease severity.
  • Understanding this phenotype is hindered by a lack of standardized definitions and research models.

Purpose of the Study:

  • To review the evidence for an irreversible component in asthma.
  • To explore the underlying pathology contributing to this limitation.
  • To assess the efficacy of current asthma treatments in preventing this complication.

Main Methods:

  • Literature review of existing studies on asthma and airflow limitation.
  • Analysis of pathological mechanisms associated with irreversible obstruction.
  • Evaluation of current therapeutic strategies for asthma management.

Main Results:

  • Evidence supports the existence of an irreversible component in asthma.
  • Pathological factors contributing to this irreversibility are identified.
  • Current asthma therapies are insufficient to prevent irreversible airflow limitation.

Conclusions:

  • Irreversible airflow obstruction is a significant asthma complication.
  • Further research is needed to define this phenotype and develop effective treatments.
  • Novel therapeutic strategies are required to address this unmet clinical need.