A Current Understanding of Fc Epsilon RI-dependent Mast Cell Activation

Overview

Journal Curr Allergy Asthma Rep

Specialties Allergy & Immunology
Pulmonary Medicine

Date 2008 Apr 2

PMID 18377769

Citations 22

Authors

Juan Rivera

Ana Olivera

Affiliations

Soon will be listed here.

Abstract

Mast cell activation via the high-affinity immunoglobulin (Ig) E receptor Fc epsilon RI is a topic of extensive investigation with therapeutic potential in allergic disease. The protein tyrosine kinases Fyn, Lyn, and Syk are intimately linked with the early events initiated by allergen-mediated aggregation of IgE-occupied Fc epsilon RI. Fyn and Lyn initiate signaling events that are organized by adaptor molecules, which compartmentalize and coordinate the activity of activated protein and lipid kinases and phospholipases to generate lipid products essential for signal amplification and mast cell function. Fyn and Lyn counter-regulate phosphatidylinositol 3-OH kinase (PI3K), controlling the produced amount of phosphatidylinositol (3,4,5)-trisphosphate (PIP3), a key regulator of mast cell degranulation. Fyn and Lyn also activate sphingosine kinases (SphK), which generate sphingosine-1-phosphate (S1P), thus contributing to mast cell chemotaxis and degranulation. Here, we summarize the current knowledge and future challenges and directions.

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