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Table of Contents
Vol. 135, No. 1, 2004
Issue release date: September 2004
Section title: Review
Int Arch Allergy Immunol 2004;135:62–72
(DOI:10.1159/000080231)

The Role of the FcεRI β-Chain in Allergic Diseases

Kraft S. · Rana S. · Jouvin M.-H. · Kinet J.-P.
Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass., USA

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Article / Publication Details

First-Page Preview
Abstract of Review

Received: 7/1/2004
Accepted: 7/8/2004
Published online: 9/22/2004

Number of Print Pages: 11
Number of Figures: 2
Number of Tables: 0

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA

Abstract

The high affinity receptor for IgE, FcεRI, is a multimeric surface receptor that is expressed exclusively as a tetramer on rodent cells, but exists as a tetramer or trimer on human cells. The tetrameric form is expressed on effector cells of allergic responses such as mast cells and basophils and is composed of an IgE-binding α-subunit, a β-subunit and a γ-subunit dimer. Complexes lacking the β-subunit are found on human antigen-presenting cells. On mast cells and basophils, FcεRI is essential for IgE-mediated acute allergic reactions. Crosslinking of FcεRI by IgE and multivalent antigen induces a signaling cascade that culminates in the release of preformed mediators and the synthesis of lipid mediators and cytokines. The β-subunit functions as an amplifier of FcεRI expression and signaling. As a consequence, strongly enhanced mast cell effector functions and in vivo allergic reactions can be observed in the presence of FcεRIβ. In contrast, a truncated β-isoform (βT) that is produced by alternative splicing acts as an inhibitor of FcεRI surface expression. Thus, by producing two proteins with antagonistic functions, the FcεRIβ gene could serve as a potent regulator of allergic responses. In addition, the genomic region encompassing the β-chain has been linked to atopy and a number of polymorphisms within the FcεRIβ gene are associated with various atopic diseases. It remains to be elucidated how these polymorphisms might affect the allergic phenotype. These functions of the β-chain together with the described genetic linkages to atopy make it a candidate for a role in the pathophysiology of allergic diseases.


  

Author Contacts

Correspondence to: Prof. Jean-Pierre Kinet
Laboratory for Allergy and Immunology, Department of Pathology
Beth Israel Deaconess Medical Center, Harvard Medical School
330 Brookline Avenue, Boston, MA 02215 (USA)
Tel. +1 617 667 1324, Fax +1 617 667 3616, E-Mail jkinet@bidmc.harvard.edu

  

Article Information

Published online: August 13, 2004
Number of Print Pages : 11
Number of Figures : 2, Number of Tables : 0, Number of References : 100

  

Publication Details

International Archives of Allergy and Immunology
Founded 1950
Official Journal of the Collegium Internationale Allergologicum

Vol. 135, No. 1, Year 2004 (Cover Date: September 2004)

Journal Editor: R. Valenta, Vienna
ISSN: 1018–2438 (print), 1423–0097 (Online)

For additional information:http://www.karger.com/iaa


Article / Publication Details

First-Page Preview
Abstract of Review

Received: 7/1/2004
Accepted: 7/8/2004
Published online: 9/22/2004

Number of Print Pages: 11
Number of Figures: 2
Number of Tables: 0

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA


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