Abstract
Immunoglobulin E (IgE) plays a central role in the pathogenesis of allergic diseases by interacting with two membrane receptors: high-affinity FcεRI and low-affinity FcεRII (CD23). Allergen-induced IgE-occupied EcεRI aggregation on the mast cell or basophil cell surface leads to the activation of intracellular signaling events and eventually the release of pre-formed and de novo synthesized inflammatory mediators. The role of FcεRII in allergic diseases has been proposed to include regulation of IgE synthesis, enhanced histamine release from basophils, and a contribution to Ag-IgE complex presentation but the exact function of CD23 remains poorly understood. This review summarizes some new developments in IgE Fc-receptor studies with an emphasis on regulation of FcεRI expression and signal transduction, including monomeric IgE, lipid raft segregation, and some recently identified negative regulators. A better understanding of signaling events following IGE FcR aggregation will shed new light on how allergy patients might be treated more safely and effectively.
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Zhang, M., Murphy, R.F. & Agrawal, D.K. Decoding IgE Fc receptors. Immunol Res 37, 1–16 (2007). https://doi.org/10.1007/BF02686092
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DOI: https://doi.org/10.1007/BF02686092