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Related Concept Videos

Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...
Upper Respiratory Drugs: First and Second-Generation Antihistamines01:15

Upper Respiratory Drugs: First and Second-Generation Antihistamines

Antihistamines are a class of drugs widely used to alleviate the symptoms of allergies, such as sneezing, itching, and nasal congestion. They work by inhibiting the actions of histamine, which is released by immune cells in response to allergenic substances or tissue injuries.
Histamine binds to specific receptor sites, known as H1 receptors, on tissue cells, triggering inflammation and swelling. Antihistamines combat these effects by competing with histamine for these receptor sites. By...
Drugs Used in Upper Respiratory Disorders: Overview01:16

Drugs Used in Upper Respiratory Disorders: Overview

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.
Antihistamines (e.g., Benadryl) block histamines from binding. Histamines are chemicals released during an allergic reaction in the body. As a...
Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

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...
Upper Respiratory Drugs: Decongestants01:27

Upper Respiratory Drugs: Decongestants

Decongestants are a class of medications used primarily to alleviate nasal congestion, a common symptom resulting from allergies, colds, sinusitis, and other upper respiratory tract infections. These drugs work by activating α-adrenergic receptors, constricting small blood vessels in the nasal membranes. This action results in the opening of clogged nasal passages, thereby facilitating sinus drainage and relieving congestion.
Most decongestants are readily available over-the-counter in various...
Allergic Drug Reactions01:27

Allergic Drug Reactions

Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing numerous...

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Immunofluorescent Labeling in Nasal Mucosa Tissue Sections of Allergic Rhinitis Rats via Multicolor Immunoassay
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Immunofluorescent Labeling in Nasal Mucosa Tissue Sections of Allergic Rhinitis Rats via Multicolor Immunoassay

Published on: September 22, 2023

Allergic rhinitis and its pharmacology.

Yousuf M Al Suleimani1, Michael J A Walker

  • 1Department of Pharmacology and Clinical Pharmacy, College of Medicine and Health Sciences, Sultan Qaboos University, Oman. rsdaa@interchange.ubc.ca

Pharmacology & Therapeutics
|April 17, 2007
PubMed
Summary

Allergic rhinitis involves allergens, symptoms like sneezing, and inflammation. Current treatments offer limited success, driving the need for novel therapeutic strategies and improved drug development.

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Area of Science:

  • Immunology
  • Pharmacology
  • Otolaryngology

Background:

  • Allergic rhinitis is a prevalent and growing global health issue.
  • Characterized by allergen triggers, symptoms (sneezing, congestion), and inflammatory cell infiltration of nasal mucosa.
  • Pathophysiology involves allergen-immunoglobulin E (IgE)-cell complex formation and inflammatory responses.

Purpose of the Study:

  • To review the pathophysiology and current drug treatments for allergic rhinitis.
  • To highlight potential new therapeutic avenues and experimental models.
  • To provide a comprehensive overview of the disease for drug development.

Main Methods:

  • Literature review of pathophysiology, current treatments, and experimental models.
  • Detailed discussion of immune cells, chemical mediators, and their receptors.
  • Analysis of existing therapeutic targets and their varying success rates.

Main Results:

  • Current drug therapies target mediators and cellular processes with variable efficacy.
  • Vasoconstrictors provide symptomatic relief but do not address underlying inflammation.
  • No single drug has proven totally effective, indicating a need for new approaches.

Conclusions:

  • The complexity of allergic rhinitis offers multiple drug targets, yet current treatments are suboptimal.
  • Continued research into the pharmacology of allergic rhinitis is crucial for developing more effective therapies.
  • Development of new experimental models is essential for advancing drug discovery.