IgE regulates T helper cell differentiation through FcγRIII mediated dendritic cell cytokine modulation

Sarah E. Blink, Yang X. Fu

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Asthma and allergy are characterized by dysregulation of inflammatory responses toward Th2 responses and high serum levels of IgE. IgE plays a role in the effector phase by triggering the degranulation of mast cells after antigen-crosslinking but its role in the induction of helper T cell differentiation is unknown. We have previously shown lymphotoxin is required for maintaining physiological levels of serum IgE which minimize spontaneous Th1-mediated airway inflammation, suggesting a physiological role for IgE in the regulation of T helper cell differentiation. We describe the mechanism in which IgE modulates inflammation by regulating dendritic cell cytokine production. Physiological levels of IgE suppress IL-12 production in the spleen and lung, suggesting IgE limits Th1 responses in vivo. IgE directly stimulates dendritic cells through FcγRIII to suppress IL-12 in vitro and influences APC to skew CD4+ T cells toward Th2 differentiation. We demonstrate a novel role for IgE in regulating differentiation of adaptive inflammatory responses through direct interaction with FcγRIII on dendritic cells.

Original languageEnglish (US)
Pages (from-to)54-60
Number of pages7
JournalCellular Immunology
Volume264
Issue number1
DOIs
StatePublished - May 21 2010

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Keywords

  • Airway inflammation
  • Dendritic cells
  • Helper T cells
  • IgE

ASJC Scopus subject areas

  • Immunology

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