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Related Concept Videos

Antiasthma Drugs: Leukotriene Modifiers01:19

Antiasthma Drugs: Leukotriene Modifiers

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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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Asthma-II: Pathophysiology and Classification01:26

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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.
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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.
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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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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Allergic Reactions02:06

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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:
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Related Experiment Video

Updated: Jun 11, 2025

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
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Cysteinyl Leukotrienes in Allergic Inflammation.

Minkyu Lee1,2, Joshua A Boyce1,2, Nora A Barrett1,2

  • 1Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA.

Annual Review of Pathology
|October 7, 2024
PubMed
Summary

Cysteinyl leukotrienes (CysLTs) are key mediators in allergic inflammation and asthma. Recent research reveals their novel roles in type 2 inflammation and highlights regulatory mechanisms of CysLT receptors.

Keywords:
airway remodelingallergic inflammationaspirin-exacerbated respiratory diseaseasthmacysteinyl leukotriene

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Area of Science:

  • Immunology
  • Pharmacology
  • Biochemistry

Background:

  • Cysteinyl leukotrienes (CysLTs), including LTC4, LTD4, and LTE4, are potent lipid mediators synthesized via the 5-lipoxygenase pathway.
  • These mediators exert pro-inflammatory and bronchoconstrictive effects through G protein-coupled receptors (GPCRs): CysLT1, CysLT2, and OXGR1 (CysLT3/GPR99).

Purpose of the Study:

  • To review the biosynthesis and regulation of CysLTs.
  • To outline the molecular and functional pharmacology of CysLT receptors.
  • To summarize the established and emerging roles of CysLTs in respiratory diseases and type 2 inflammation.

Main Methods:

  • Literature review of in vitro studies and murine models.
  • Analysis of established roles in allergic inflammation and asthma.
  • Exploration of novel roles in type 2 inflammation induction and amplification.

Main Results:

  • CysLTs are crucial in the effector phase of allergic inflammation and asthma.
  • Novel roles for CysLTs and their receptors in initiating and enhancing type 2 inflammation have been identified.
  • Diverse regulatory mechanisms controlling CysLT receptor activity have been uncovered.

Conclusions:

  • CysLTs and their receptors are central players in asthma and aspirin-exacerbated respiratory disease.
  • Emerging evidence points to significant involvement of CysLTs in type 2 inflammatory conditions.
  • Further research into CysLT regulatory mechanisms may offer new therapeutic strategies.