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Related Concept Videos

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
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Asthma: Pathogenesis and Management01:20

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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.
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Drugs Used in Upper Respiratory Disorders: Overview01:16

Drugs Used in Upper Respiratory Disorders: Overview

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Upper respiratory tract disorders, including viral infections and allergic rhinitis, cause significant discomfort and disrupt daily life. Managing these conditions involves a variety of drugs, such as antihistamines, intranasal steroids, decongestants, antitussives, expectorants, and mucolytics. Specific examples of drugs in each category are provided.
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Antiasthma Drugs: Leukotriene Modifiers01:19

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Leukotriene modifiers, or cysteinyl leukotriene receptor antagonists, are medications used to manage chronic asthma. These agents target specific inflammatory mediators produced during arachidonic acid metabolism, an essential process in generating inflammation in the body.
Leukotriene modifiers work through two distinct mechanisms:
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Antiasthma Drugs: Muscarinic Receptor Antagonists01:20

Antiasthma Drugs: Muscarinic Receptor Antagonists

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Muscarinic receptor antagonists, also known as antimuscarinic agents, are a class of bronchodilators used to treat asthma, although they are more commonly used to treat COPD. They work by inhibiting the action of acetylcholine (ACh), a neurotransmitter, on muscarinic receptors found in the airways.
Antimuscarinic agents compete with ACh for the same binding site on the muscarinic receptors. By binding to these receptors, they inhibit the downstream effects of ACh and block the parasympathetic...
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Upper Respiratory Drugs: Antitussives, Expectorants, and Mucolytics01:23

Upper Respiratory Drugs: Antitussives, Expectorants, and Mucolytics

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Respiratory symptoms, such as congestion and cough, commonly accompany respiratory tract conditions. Various medications, such as antitussives, expectorants, and mucolytics, play crucial roles in providing relief.
Antitussives include codeine, dextromethorphan (Robitussin), and benzonatate (Tessalon). Codeine and dextromethorphan exert their effects centrally by suppressing the cough reflex center in the medulla.  Benzonatate operates peripherally within the respiratory tract by...
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Related Experiment Video

Updated: Jul 4, 2025

Rapid Viscoelastic Characterization of Airway Mucus Using a Benchtop Rheometer
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Do Biologic Therapies Decrease Mucus Plugging in Asthma?

James G Krings1, David S Gierada2

  • 1Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis.

NEJM Evidence
|February 6, 2024
PubMed
Summary
This summary is machine-generated.

Abnormal mucus production and clearance are key in asthma. In severe asthma, mucus plugs correlate with worse airflow obstruction and eosinophilic inflammation.

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Area of Science:

  • Pulmonology
  • Respiratory Medicine
  • Pathophysiology

Background:

  • Abnormal mucus production and clearance are recognized factors in asthma pathophysiology.
  • Mucus plugs are prevalent in severe asthma cases.
  • Higher mucus plug scores correlate with increased airflow obstruction.

Discussion:

  • Mucus plugs are linked to deficits in regional ventilation.
  • Hyperpolarized gas magnetic resonance imaging can delineate these ventilation deficits.
  • This highlights the impact of mucus plugging on lung function.

Key Insights:

  • Mucus plug severity is a direct indicator of asthma severity.
  • Eosinophilic airway inflammation markers are associated with higher mucus plug scores.
  • Ventilation abnormalities are associated with mucus plugging.

Outlook:

  • Further research into mucus plug formation and clearance mechanisms is warranted.
  • Investigating therapeutic strategies targeting mucus plugs could improve asthma management.
  • Advanced imaging techniques may offer new diagnostic and monitoring tools.