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Related Concept Videos

Allergic Reactions02:06

Allergic Reactions

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Overview
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Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

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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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Bronchodilators are critical in managing asthma, a chronic respiratory condition characterized by airway constriction due to inflammation and hyper-reactivity. Specifically, bronchodilators ease this constriction by relaxing the bronchial muscles, facilitating easier breathing.
One class of bronchodilators includes β2-adrenoceptor agonists. These agents target the β2-adrenoceptors located on bronchial smooth muscle cells. By stimulating these receptors, β2-agonists induce...
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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-IV: Diagnostic and Management01:30

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The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
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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...
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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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Inhaled allergen bronchoprovocation tests.

Zuzana Diamant1, Gail M Gauvreau, Don W Cockcroft

  • 1Department of Respiratory Medicine and Allergology, Skane University, Lund, Sweden; Department of General Practice, University Medical Centre Groningen, Groningen, The Netherlands.

The Journal of Allergy and Clinical Immunology
|October 15, 2013
PubMed
Summary
This summary is machine-generated.

The allergen bronchoprovocation test is a safe and reproducible research tool for studying allergic asthma exacerbations. It effectively models asthma pathophysiology and aids in evaluating new asthma therapies during early drug development.

Keywords:
AHRAPC(20)AUCAirway hyperresponsivenessAllergen challengeAllergen concentration causing a decrease in FEV(1) of 20% from baselineArea under the curveEAREarly asthmatic (allergic) responseExhaled nitric oxideLARLate asthmatic (allergic) responseSOPStandard operating procedureasthmadrug developmenteNOmethodology

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Area of Science:

  • Allergy and Immunology
  • Pulmonology
  • Pharmacology

Background:

  • The allergen bronchoprovocation test is a validated method for modeling allergic asthma.
  • It reproduces key clinical and pathophysiological features of asthma in sensitized individuals.

Purpose of the Study:

  • To review and provide recommendations for the standardized allergen challenge method.
  • To highlight its utility as a research tool in asthma and early drug development.

Main Methods:

  • Standardized allergen challenge in sensitized subjects.
  • Airway sampling and sensitive detection techniques.
  • Analysis of T-helper 2 (TH2) cell-driven asthma physiology and late-phase responses.

Main Results:

  • Allergen challenge is safe, reproducible, and has low within-subject variability.
  • It demonstrates good positive and excellent negative predictive values for new asthma therapies.
  • The test is valuable for evaluating targeted controller therapies.

Conclusions:

  • The allergen bronchoprovocation test is crucial for understanding asthma pathophysiology and evaluating novel therapeutics.
  • Recommendations for harmonization of methods, measurements, sample size, and safety are provided for future research.