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Related Concept Videos

Cross-reactivity00:42

Cross-reactivity

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

Hypersensitivity Reactions: Immune-Complex Reactions

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 sickness, a systemic...
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.
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Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Allergic Reactions02:06

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Related Experiment Video

Updated: Jun 2, 2026

Microwaving and Fluorophore-Tyramide for Multiplex Immunostaining on Mouse Adrenals &#8722; Using Unconjugated Primary Antibodies from the Same Host Species
07:37

Microwaving and Fluorophore-Tyramide for Multiplex Immunostaining on Mouse Adrenals − Using Unconjugated Primary Antibodies from the Same Host Species

Published on: February 21, 2020

A case of cross-reactivity.

Hendrik C Korswagen1

  • 1Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center Utrecht, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands. r.korswagen@hubrecht.eu

Chemistry & Biology
|April 26, 2011
PubMed
Summary

Previous studies suggested p38 MAP kinase regulates Wnt/β-catenin signaling. However, new research reveals that p38 inhibitors actually affect casein kinase Iδ/ɛ, leading to Wnt/β-catenin pathway inhibition.

Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Biochemistry

Background:

  • p38 MAP kinase has been implicated as a key regulator of the Wnt/β-catenin signaling pathway.
  • Chemical inhibitors targeting p38 MAP kinase have been used to study its role in this pathway.

Discussion:

  • Verkaar et al. (2011) investigated the mechanism by which p38 inhibitors affect Wnt/β-catenin signaling.
  • Their findings indicate that the observed inhibition is not due to direct p38 MAP kinase activity.

Key Insights:

  • Cross-reactivity of commonly used p38 inhibitors with casein kinase Iδ/ɛ was identified as the primary cause of Wnt/β-catenin pathway inhibition.
  • This cross-reactivity confounds previous interpretations of p38 MAP kinase's role in this signaling cascade.

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Humanized Mediator Release Assay as a Read-Out for Allergen Potency
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Published on: June 29, 2021

Outlook:

  • Re-evaluation of previous studies relying on these specific p38 inhibitors is necessary.
  • Future research should employ more selective inhibitors or alternative methods to accurately determine the role of p38 MAP kinase in Wnt/β-catenin signaling.