In vivo modulation of the high- affinity receptor for IgE (Fcεri) on human epidermal langerhans cells

Thomas Bieber, Johannes Ring

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20 Scopus citations


The presence of IgE-bcaring epidermal Langerhans cells (LC) has been reported not only in patients with atopic eczema (AE) but also in patients with various inflammatory dermatoses unrelated to atopic diathesis. We have shown very recently that normal LC express the high-affinity receptor for IgE (FceRI) which accounts for the binding of monomeric IgE on these cells. In the present study, we investigated the IgE-binding capacity of resident LC on cryosections from skin of normal individuals and from uninvolved and involved skin of patients with atopic eczema, psoriasis, lupus erythematosus and mycosis fungoides. When compared to LC from uninvolved or normal skin, an increased binding of IgE was observed in LC from lesional skin of all four diseases studied here. This binding could be blocked by anti-FceRI mAb. Furthermore, increased IgE binding capacity of LC correlated to an increased expression of FceRI on these cells. These results clearly demonstrate that the expression of FceRI on LC is increased in inflammatory skin areas. Since this phenomenon is observed in several unrelated diseases, it suggests the presence in these conditions of a similar microenvironment which up-regulates the FceRI expression on LC.

Original languageEnglish
Pages (from-to)204-207
Number of pages4
JournalInternational Archives of Allergy and Immunology
Issue number2-4
StatePublished - 1992
Externally publishedYes


  • Atopy
  • IgE receptor
  • Langerhans cells


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