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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),...
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...
Adrenergic Agonists: Therapeutic Uses01:30

Adrenergic Agonists: Therapeutic Uses

Adrenergic agonists have diverse therapeutic uses across various medical conditions and emergencies.
Emergency and Intensive Care Unit (ICU) applications: Pressor agents increase blood pressure, heart rate, and contractility in shock and organ failure situations. Dopamine can induce vasodilation and stimulate adrenoceptors. Endogenous catecholamines are effective in treating cardiogenic shock. α2-agonists like clonidine can reverse anesthesia-induced hypertension.
Allergies and anaphylaxis:...
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...
Blood Pressure Imbalances and Circulatory Shock01:24

Blood Pressure Imbalances and Circulatory Shock

Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...

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Related Experiment Video

Updated: Jun 19, 2026

Measuring Local Anaphylaxis in Mice
07:49

Measuring Local Anaphylaxis in Mice

Published on: October 14, 2014

ANAPHYLACTIC SHOCK BY AZODYES.

K Landsteiner1, J van der Scheer

  • 1Laboratories of The Rockefeller Institute for Medical Research.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Anaphylactic shock was induced in sensitized animals using specific azodyes. These reactions were highly specific, even with minimal dye amounts, demonstrating a targeted immune response.

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Published on: September 14, 2018

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Last Updated: Jun 19, 2026

Measuring Local Anaphylaxis in Mice
07:49

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Published on: October 14, 2014

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation
04:34

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Published on: September 14, 2018

Area of Science:

  • Immunology
  • Allergy research
  • Pharmacology

Background:

  • Anaphylaxis is a severe allergic reaction.
  • Azoproteins and azodyes are chemical compounds with potential allergenic properties.

Purpose of the Study:

  • To investigate the induction of anaphylactic shock using azodyes in sensitized animals.
  • To determine the specificity and sensitivity of anaphylactic reactions to azodyes.

Main Methods:

  • Sensitization of animals with azoproteins.
  • Induction of anaphylactic shock by injecting specific azodyes.
  • Observation and quantification of anaphylactic reactions.

Main Results:

  • Anaphylactic shock was successfully induced in animals sensitized with azoproteins.
  • The induced reactions were specific to the azo components of the antigen.
  • Anaphylaxis occurred with very small quantities of azodyes (milligrams).

Conclusions:

  • Azodyes can effectively induce anaphylactic shock in specifically sensitized animals.
  • The anaphylactic response to azodyes is highly specific.
  • This study highlights the potential of azodyes as allergens and provides a model for studying allergic reactions.