Allergic Contact Dermatitis
Allergic Contact Dermatitis - Related Videos
08:25
Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
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Cited by 2 •
2022
Contact hypersensitivity (CHS) is a murine experimental model of allergic contact dermatitis (ACD). CHS is based on sensitization with reactive hapten by painting the shaved skin of the chest and abdomen, with a subsequent ear skin challenge with a diluted hapten, causing a swelling reaction that is assessed in various ways.
08:02
A Mouse Ear Model for Allergic Contact Dermatitis Evaluation
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Cited by 1 •
2023
Here, we describe the methods for inducing allergic contact dermatitis in mouse ears by 1-fluoro-2,4-dinitrobenzene (DNFB) and how to evaluate the severity of allergic contact dermatitis.
02:06
Allergic Reactions
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2019
Overview We speak of an allergy when the immune system triggers a response against a benign foreign structure, like food, pollen or pet dander. These elicitors are called allergens. If the immune system of a hypersensitive individual was primed against a specific allergen, it will trigger allergic symptoms during every subsequent encounter of the allergen. Symptoms can be mild, such as hay fever, to severe, such as potentially fatal anaphylactic shock. Sensitization Is the First Step of an...
10:27
Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis
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Cited by 10 •
2011
Dermatitis herpetiformis (DH) is a chronic inflammatory condition characterized by an autoimmune reaction between IgA and epidermal transglutaminase (eTG). DH develops in a very small portion of gluten-sensitive and/or celiac patients. The results of this study indicate that DH can also develop in a rhesus monkey host with symptoms of idiopatic dermatitis.
06:47
Effects of Exposure of Formaldehyde to a Rat Model of Atopic Dermatitis Induced by Neonatal Capsaicin Treatment
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Cited by 3 •
2017
We describe here methods for neonatal capsaicin treatment to induce atopic dermatitis in rats and exposure of vaporized formaldehyde to investigate the effects of formaldehyde inhalation on atopic dermatitis.
FAQs
Haptens are small chemicals that can penetrate the epidermis and bind to skin proteins. This binding changes how the substance is handled by the immune system, allowing it to be presented to T cells during sensitization. The hapten-protein interaction therefore helps explain how an external contact substance becomes linked to adaptive immune recognition.
Sensitization establishes immune recognition by presenting hapten-related material to T cells. A later exposure activates memory T cells that were generated during this earlier stage. This distinction explains why the inflammatory response occurs after subsequent contact and connects allergic contact dermatitis with adaptive immune memory rather than a single nonspecific skin reaction.
Activated memory T cells release cytokines, which help recruit inflammatory cells into the affected tissue. The resulting local inflammation produces clinical changes such as redness, itching, and sometimes vesicles. These findings represent the tissue-level outcome of coordinated immune signaling and cell recruitment, making the skin a visible site for studying inflammatory mechanisms.
Trigger identification combines information from the clinical history with patch testing. The history can connect symptoms with relevant contact exposures, while patch testing helps evaluate reactions to suspected substances. Together, these approaches support recognition of the responsible trigger, allowing investigators and clinicians to relate immune responses to occupational or consumer-product exposures.
This condition provides a model for examining antigen presentation, T-cell memory, and tissue inflammation. Its sequence from hapten exposure through immune activation and inflammatory recruitment links molecular recognition with observable skin outcomes. Although the initiating substances are contact chemicals, the response offers broader insight into how adaptive immune mechanisms generate localized tissue inflammation.
Recognizing the responsible contact substance supports avoidance strategies. This is especially relevant when exposures arise from workplaces or consumer products, where repeated contact may maintain the problem. Clinical history and patch testing can therefore do more than identify an immune trigger: they can guide practical changes in exposure and inform management of occupational or product-related disease.