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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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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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Antiasthma Drugs: β2-Adrenoceptor Agonists01:25

Antiasthma Drugs: β2-Adrenoceptor Agonists

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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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Drugs Used in Lower Respiratory Disorders: Overview01:17

Drugs Used in Lower Respiratory Disorders: Overview

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Lower respiratory tract disorders present challenges that often require skilled and nuanced approaches for effective management. Common ailments, such as asthma and chronic obstructive pulmonary disease (COPD), have prompted the development of intricate treatment strategies involving bronchodilators and anti-inflammatory drugs, each tailored to ease breathing and revitalize the lungs.
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...
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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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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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Related Experiment Video

Updated: Mar 23, 2026

Real-time Imaging of Leukotriene B4 Mediated Cell Migration and BLT1 Interactions with β-arrestin
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Real-time Imaging of Leukotriene B4 Mediated Cell Migration and BLT1 Interactions with β-arrestin

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Cysteinyl Leukotriene Receptor Antagonists Decrease Cancer Risk in Asthma Patients.

Ming-Ju Tsai1,2, Ping-Hsun Wu3,4, Chau-Chyun Sheu1,5

  • 1Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.

Scientific Reports
|April 8, 2016
PubMed
Summary
This summary is machine-generated.

Cysteinyl leukotriene receptor antagonists (LTRAs) show promise in cancer chemoprevention. This study found LTRA use significantly reduced cancer risk in asthma patients, with risk decreasing in a dose-dependent manner.

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Area of Science:

  • Pharmacology
  • Oncology
  • Epidemiology

Background:

  • In vitro and in vivo studies suggest cysteinyl leukotriene receptor antagonists (LTRAs) have chemopreventive potential.
  • Clinical evidence for the chemopreventive effects of LTRAs is lacking.

Purpose of the Study:

  • To investigate the chemopreventive effect of LTRAs in a clinical setting.
  • To evaluate the association between LTRA use and cancer risk in asthma patients.

Main Methods:

  • A nationwide population-based study using the Taiwan National Health Insurance Research Database.
  • Matching 4185 LTRA users with 20925 LTRA non-users diagnosed with asthma (2001-2011).
  • Multivariable Cox regression analyses to assess cancer incidence and LTRA use, adjusting for covariates.

Main Results:

  • LTRA users exhibited a significantly lower cancer incidence rate compared to non-users.
  • LTRA use was identified as an independent protective factor against cancer (HR = 0.31).
  • Cancer risk decreased progressively with increasing cumulative doses of LTRAs.

Conclusions:

  • LTRA use is associated with a reduced cancer risk in asthma patients.
  • The chemopreventive effect of LTRAs appears to be dose-dependent.
  • Further clinical studies are warranted to explore the chemopreventive role of LTRAs.