Journal
EUROPEAN JOURNAL OF DERMATOLOGY
Volume 24, Issue 1, Pages 10-14Publisher
JOHN LIBBEY EUROTEXT LTD
DOI: 10.1684/ejd.2013.2187
Keywords
allergy; IgE; protein; skin immune system; skin penetration; Th2 response
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The skin has a sophisticated and highly orchestrated immune system. The ability of proteins encountered at skin surfaces to access that immune system remains controversial, however. In this article the question considered is whether proteins encountered epicutaneously (on the skin) at abraded or tape-stripped skin surfaces, but also at sites where the skin is intact, can engage with the cutaneous immune system to provoke and regulate responses. The available evidence suggests that epicutaneous exposure to foreign proteins is able to elicit immune and allergic responses, and that encounter with protein via this route may favour the development of selective Th2 responses and allergic sensitisation. It is also clear that proteins can modify immunological function when delivered topically and that intact skin may provide an effective route of exposure for active inamunotherapy of allergic disease. An appreciation that epicutaneously applied proteins can interact with the skin immune system, even when delivered at intact skin sites, opens up important opportunities for immunotherapy, local immune modulation and the treatment of inflammatory skin diseases. It also indicates that this route of exposure must be considered as part of the safety assessment and risk management of protein-induced allergic sensitisation.
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