PMID: 18409354Apr 16, 2008Paper

Type IV of hypersensitivity and its subtypes

Przegla̧d lekarski
Ewa CzarnobilskaKatarzyna Wsołek

Abstract

Type IV of hypersensitivity reaction is usually manifested in the skin in different clinical pattern. According to traditional Gell and Coombs classification, the mechanism of IV type of allergic reaction has been associated with contact allergy with the activity of lymphocytes Th1 secreting interferon gamma. Now, this vision seems to be too simplified. In the last years there were publications, which can throw a new light on these complicated mechanisms leading to the development of the type IV of allergy, especially to drugs, nickel and other haptens and also can explain the differentiation of clinical pattern in respective patients. The skin symptoms in type IV of hypersensitivity are triggered by activation of specific T-cell CD4+ and CD8+. Immunohistochemical and functional analysis of reactive T-cell has shown that the delayed hypersensitivity reaction depends on the secreted cytokines. For example maculo-papular exanthema may be either triggered by Th1 or Th2 in nature and cytokines interferon gamma, tumor necrosis factor alfa or interleukin-4, 5 and 13. Bullous reactions (i.e. Stevens-Johnsons Syndrome or toxic epidermal necrolysis) are characterized by widespread keratinocyte apoptosis, a consequence of high CD8+ T-cel...Continue Reading

Related Concepts

Related Feeds

Asthma

This feed focuses in Asthma in which your airways narrow and swell. This can make breathing difficult and trigger coughing, wheezing and shortness of breath.

Allergy and Asthma

Allergy and asthma are inflammatory disorders that are triggered by the activation of an allergen-specific regulatory t cell. These t cells become activated when allergens are recognized by allergen-presenting cells. Here is the latest research on allergy and asthma.

Allergies & Environmental Factors

Environmental factors are strongly associated with the prevalence of allergies and are an increasing health concern worldwide. Discover the latest research on Allergies and Environmental Factors here.

Related Papers

The Mount Sinai Journal of Medicine, New York
Marc J Meth, Kirk E Sperber
Annals of Internal Medicine
Werner J Pichler
American Journal of Clinical Dermatology
Werner J PichlerDean Naisbitt
Allergy and Asthma Proceedings
Ashraf Uzzaman, Seong H Cho
Current Opinion in Allergy and Clinical Immunology
Nikhil Yawalkar, Werner J Pichler
© 2022 Meta ULC. All rights reserved