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Current Opinion in Allergy & Clinical Immunology:
doi: 10.1097/ACI.0b013e3283574ccb
SKIN ALLERGY: Edited by Thomas Werfel and Torsten Zuberbier

Immunoregulation in cutaneous allergy: prevention and control

Zielinski, Christina E.; Zuberbier, Torsten; Maurer, Marcus

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Purpose of review: The cutaneous surface is exposed to a myriad of encounters with chemicals, allergens and microbes. Nevertheless, it withstands these environmental assaults without overt inflammation. We will discuss the role of T regulatory cells in a situation where this tissue homeostasis fails – cutaneous allergy, in particular contact hypersensitivity.

Recent findings: Immune regulation is a complex process that is mediated by many cellular players. T regulatory cells have risen to particular prominence as potent immunosuppressors because their absence results in inflammation including skin allergy. Recent findings revealed that T regulatory cells comprise a heterogeneous group of subpopulations with specialized homing capabilities and suppressor functions. The stability of the T regulatory cell subset in proinflammatory microenvironments is controversially discussed. In addition, it has recently been shown that mechanisms by which T regulatory cells exert their immunosuppressive functions can be adopted by pathogenic effector T cells in certain situations.

Summary: In cutaneous allergy, immunoregulatory mechanisms are dysfunctional. The cellular players comprise classical T regulatory cells as well as effector T cells with regulatory activities. Understanding their role in skin homeostasis and the mechanisms by which their regulatory functions are abrogated will yield novel therapeutic targets for the treatment of cutaneous allergies.

Copyright © 2012 Wolters Kluwer Health, Inc. All rights reserved.


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