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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

201
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,...
201
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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Allergic Drug Reactions01:27

Allergic Drug Reactions

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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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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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Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

169
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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Related Experiment Video

Updated: Apr 11, 2026

Humanized Mediator Release Assay as a Read-Out for Allergen Potency
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Microbes that chew allergens mitigate anaphylaxis.

Huiqi Wang1, Shijie Cao1

  • 1Department of Pharmaceutics, School of Pharmacy, University of Washington, Seattle, WA 98195, USA.

Cell Host & Microbe
|April 9, 2026
PubMed
Summary

Gut bacteria can influence severe allergic reactions like peanut anaphylaxis. This research shows microbes can break down allergens, offering potential new allergy treatments.

Area of Science:

  • Microbiology
  • Immunology
  • Gastroenterology

Background:

  • Food-induced anaphylaxis is a severe, potentially life-threatening allergic reaction.
  • The role of the gut microbiome in modulating allergic responses is an emerging area of research.

Purpose of the Study:

  • To investigate the mechanisms by which oral and small intestinal bacteria influence immunoglobulin E (IgE)-mediated anaphylaxis.
  • To explore the potential of microbial activity in allergen degradation as a therapeutic strategy for food allergies.

Main Methods:

  • Analysis of bacterial communities in the oral cavity and small intestine.
  • Assessment of bacterial metabolic activity on peanut allergens.
  • Evaluation of the impact of these bacteria on IgE-mediated anaphylaxis models.

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

  • Specific oral and small intestinal bacteria were found to metabolically degrade key peanut allergens.
  • This degradation significantly modulated the severity of IgE-mediated anaphylaxis in experimental models.
  • Microbial metabolic pathways were identified as crucial in reducing allergenicity.

Conclusions:

  • Gut and oral bacteria play a significant role in modulating food-induced anaphylaxis.
  • Bacterial degradation of allergens presents a novel mechanism influencing allergic reactions.
  • Targeting microbial metabolism could offer new therapeutic avenues for managing food allergies.