Related Experiment Video
Updated: Jul 16, 2026
08:25
Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
Published on: September 26, 2022
Atopic dermatitis and aeroallergen contact sensitivity.
A D Adinoff1, P Tellez, R A Clark
1Department of Pediatrics, National Jewish Center for Immunology and Respiratory Medicine, Denver, Colo. 80206.
The Journal of Allergy and Clinical Immunology
|April 1, 1988
Summary
Atopic dermatitis (AD) can be exacerbated by airborne allergens. This study found that 10 AD patients showed improved skin symptoms when avoiding environmental allergens, indicating a role for both immediate and delayed hypersensitivity.
Area of Science:
- Immunology
- Dermatology
- Allergology
Background:
- Atopic dermatitis (AD) is a chronic inflammatory skin condition often exacerbated by environmental factors.
- While food allergens are commonly implicated, the role of aeroallergens in AD pathogenesis requires further investigation.
Purpose of the Study:
- To investigate the role of aeroallergen sensitivity in patients with atopic dermatitis.
- To evaluate both immediate and delayed hypersensitivity reactions to aeroallergens in AD patients.
Main Methods:
- Ten patients with atopic dermatitis and suspected aeroallergen sensitivity were studied.
- Patients underwent prick testing with aeroallergen extracts, followed by patch testing on uninvolved skin with positive prick test allergens.
- Delayed cutaneous responses were assessed 72 hours after patch test application.
Main Results:
- All 10 patients exhibited positive immediate prick test reactions to various aeroallergens.
- Significant delayed cutaneous responses were observed in 50% of patients to house dust mite, pollens, animal danders, and molds.
- Improvement in skin symptoms was noted when patients avoided relevant environmental allergens.
Conclusions:
- Aeroallergen contact can significantly contribute to atopic dermatitis in susceptible individuals.
- The findings suggest that both IgE-mediated (immediate) and cell-mediated (delayed) hypersensitivity mechanisms play a role in AD.
- Environmental allergen avoidance may be a crucial therapeutic strategy for selected AD patients.
Related Concept Videos
02:06Allergic Reactions
Overview
01:30Hypersensitivities
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...
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...
01:26Asthma-II: Pathophysiology and Classification
Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
01:30Drug 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...
01:30Allergic 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),...
01:28Asthma I: Introduction
Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...