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Related Concept Videos

Allergic Reactions02:06

Allergic Reactions

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Overview
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Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

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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,...
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Drug Toxicity: Allergic Reactions01:30

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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...
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Hypersensitivities01:30

Hypersensitivities

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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
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Allergic Drug Reactions01:27

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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...
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Hypersensitivity Reactions: Immune-Complex Reactions01:19

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Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum...
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A Mouse Ear Model for Allergic Contact Dermatitis Evaluation
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Update on skin allergy.

C Schlapbach1, D Simon

  • 1Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.

Allergy
|October 7, 2014
PubMed
Summary
This summary is machine-generated.

Recent advancements enhance understanding of allergic skin diseases like atopic dermatitis and urticaria. New insights into immune dysfunction and skin barrier links are driving improved treatments and patient management strategies.

Keywords:
atopic dermatitisautoinflammatory diseasesdrug hypersensitivitymastocytosisurticaria

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Area of Science:

  • Dermatology and Immunology
  • Allergic and Immune-Mediated Skin Diseases

Background:

  • Allergic skin conditions, including atopic dermatitis, allergic contact dermatitis, and urticaria, are highly prevalent.
  • Immune cell dysfunction frequently presents with dermatological manifestations.
  • Understanding the interplay between skin barrier integrity and allergic sensitization is crucial for managing the atopic march.

Purpose of the Study:

  • To review recent research on allergic skin diseases.
  • To highlight novel findings, clinical trial outcomes, and updated management guidelines.
  • To synthesize current knowledge on pathogenesis and therapeutic advancements.

Main Methods:

  • Literature review of recently published articles.
  • Synthesis of research findings on disease mechanisms and clinical trials.
  • Analysis of current guidelines and position papers for disease management.

Main Results:

  • Significant progress in understanding the skin barrier's role in allergic sensitization and the atopic march.
  • New therapeutic strategies and approaches developed for urticaria, angioedema, and mastocytosis based on pathogenic insights.
  • Identification of novel autoinflammatory diseases linked to specific pathomechanisms like IL-1.
  • Development and implementation of improved patient management guidelines.

Conclusions:

  • Recent research has significantly advanced the understanding and management of allergic and immune-related skin diseases.
  • Novel therapeutic targets and strategies are emerging from a deeper comprehension of disease pathogenesis.
  • Harmonized patient care is being achieved through updated guidelines and position papers.