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Allergic Reactions02:06

Allergic Reactions

Overview
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...
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),...
Hypersensitivities01:30

Hypersensitivities

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...
Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview

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Updated: May 22, 2026

Absorption of Nasal and Bronchial Fluids: Precision Sampling of the Human Respiratory Mucosa and Laboratory Processing of Samples
11:54

Absorption of Nasal and Bronchial Fluids: Precision Sampling of the Human Respiratory Mucosa and Laboratory Processing of Samples

Published on: January 21, 2018

アレルギー性宿主の防御は,

Noah W Palm1, Rachel K Rosenstein, Ruslan Medzhitov

  • 1Howard Hughes Medical Institute, Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut 06510, USA.

Nature
|April 28, 2012
PubMed
まとめ
この要約は機械生成です。

しばしば有害と見なされるアレルギー反応は,実際には環境毒素や刺激物質に対する有益な免疫防衛である可能性があります. この免疫過敏性は,有害な物質や環境の回避を促進するために進化する可能性があります.

さらに関連する動画

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
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Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis

Published on: September 26, 2022

Humanized Mediator Release Assay as a Read-Out for Allergen Potency
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Humanized Mediator Release Assay as a Read-Out for Allergen Potency

Published on: June 29, 2021

関連する実験動画

Last Updated: May 22, 2026

Absorption of Nasal and Bronchial Fluids: Precision Sampling of the Human Respiratory Mucosa and Laboratory Processing of Samples
11:54

Absorption of Nasal and Bronchial Fluids: Precision Sampling of the Human Respiratory Mucosa and Laboratory Processing of Samples

Published on: January 21, 2018

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
08:25

Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis

Published on: September 26, 2022

Humanized Mediator Release Assay as a Read-Out for Allergen Potency
10:22

Humanized Mediator Release Assay as a Read-Out for Allergen Potency

Published on: June 29, 2021

科学分野:

  • 免疫学 免疫学とは
  • 環境衛生 環境衛生 環境衛生

背景:

  • アレルギーは通常,寄生虫に対する有害な免疫反応と見なされます.
  • アレルギー反応の進化的目的は,まだ完全に理解されていない.

研究 の 目的:

  • アレルギー性免疫の進化的役割に関する新しい視点を提案する.
  • ホスト防衛におけるアレルギー反応の潜在的な利点を探求する.

主な方法:

  • 既存の免疫学的および進化的データのレビューと合成.
  • アレルギー反応の機能の議論的分析.

主要な成果:

  • アレルギー性免疫は,毒や刺激物質などの有害な環境物質に対する防御機構として機能する可能性があります.
  • 適切に標的を絞ったアレルギー反応は有益であり,過剰な反応は有害である.

結論:

  • アレルギー性過敏症は,予期的な反応を促進し,不適切な環境を回避するために進化した可能性があります.
  • この視点では,アレルギーを単に病気としてではなく,潜在的に適応性のある免疫機能として再定義します.