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Related Concept Videos

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...
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
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...
Hypersensitivity Reactions: Delayed Hypersensitivity Reactions01:29

Hypersensitivity Reactions: Delayed Hypersensitivity Reactions

Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...
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...

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Effects of Exposure of Formaldehyde to a Rat Model of Atopic Dermatitis Induced by Neonatal Capsaicin Treatment
06:47

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Published on: September 27, 2017

Allergic contact dermatitis from formaldehyde textile resins.

Hilary C Reich1, Erin M Warshaw

  • 1University of Minnesota, Minneapolis, MN, USA.

Dermatitis : Contact, Atopic, Occupational, Drug
|March 18, 2010
PubMed
Summary

Formaldehyde resins in textiles can cause allergic contact dermatitis. This review covers their history, diagnosis, management, and current regulations for safer fabric finishes.

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Area of Science:

  • Textile chemistry
  • Dermatology
  • Toxicology

Background:

  • Formaldehyde-based resins have been utilized for permanent-press fabric finishes since the 1920s.
  • These resins are recognized as potent sensitizers, capable of inducing allergic contact dermatitis in susceptible individuals.
  • Concerns regarding formaldehyde exposure and its health implications have grown over time.

Purpose of the Study:

  • To provide a comprehensive historical overview of formaldehyde textile resin application.
  • To detail the diagnostic approaches and management strategies for allergic contact dermatitis caused by these resins.
  • To examine the current regulatory landscape governing formaldehyde resins in the textile industry.

Main Methods:

  • Literature review of historical textile manufacturing practices.
  • Synthesis of clinical data on allergic contact dermatitis diagnosis and treatment.
  • Analysis of regulatory documents and standards related to textile chemicals.

Main Results:

  • The long-standing use of formaldehyde resins has led to widespread exposure.
  • Allergic contact dermatitis is a significant clinical outcome associated with these finishes.
  • Regulatory scrutiny is increasing, prompting a re-evaluation of formaldehyde use in textiles.

Conclusions:

  • Understanding the history and impact of formaldehyde resins is crucial for managing textile-related allergies.
  • Effective diagnosis and management protocols are essential for patients with allergic contact dermatitis.
  • Evolving regulations aim to mitigate risks associated with formaldehyde in consumer textiles.