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Related Concept Videos

Allergic Reactions02:06

Allergic Reactions

Overview
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),...
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...
Antibody Structure01:10

Antibody Structure

Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...
Cross-reactivity00:42

Cross-reactivity

Overview

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Related Experiment Video

Updated: Jun 1, 2026

Basophil Activation Test for Allergy Diagnosis
07:22

Basophil Activation Test for Allergy Diagnosis

Published on: May 31, 2021

[What to expect from allergy tests?].

F Spertini1, A Leimgruber, P-A Bart

  • 1Service d'immunologie et d'allergie CHUV, 1011 Lausanne. Francois.Spertini@chuv.ch

Revue Medicale Suisse
|May 24, 2011
PubMed
Summary
This summary is machine-generated.

New diagnostic tools in allergology, like allergen micro-arrays, offer better insights into cross-reactivities and reaction severity. These advanced specific IgE tests require careful evaluation for medical usefulness and cost-effectiveness.

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Related Experiment Videos

Last Updated: Jun 1, 2026

Basophil Activation Test for Allergy Diagnosis
07:22

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Published on: May 31, 2021

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
08:47

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber

Published on: March 3, 2023

A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma
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A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma

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Area of Science:

  • Allergology and Immunology
  • Diagnostic Technologies
  • Molecular Allergology

Context:

  • Advancements in diagnostic methods for allergic diseases.
  • Emergence of purified/recombinant allergens and multitests.
  • Need for improved understanding of allergen cross-reactivity.

Purpose:

  • To evaluate novel diagnostic approaches in allergology.
  • To assess the utility of allergen micro-arrays and specific IgE tests.
  • To understand the implications of new diagnostic technologies on clinical practice.

Summary:

  • Novel diagnostic tools, including purified allergens and allergen micro-arrays, are transforming allergology.
  • These technologies enhance the understanding of cross-reactivity between respiratory and food allergens.
  • New-generation specific IgE tests promise better risk and severity assessment compared to traditional methods.

Impact:

  • Potential for more precise allergy diagnosis and patient management.
  • Need for thorough analysis of medical utility and public health economic impact.
  • Future direction in personalized allergy diagnostics and treatment strategies.