Proteomic Approach to Fc[epsilon]RI Aggregation-Initiated Signal Transduction Cascade in Human Mast Cells
Background: Mast cells (MCs) play a central role in allergic reactions through high-affinity IgE receptor (Fc[straight epsilon]RI)-mediated responses. Many attempts have been performed to investigate MC functions, though molecular bases of the intracellular signaling cascade through Fc[straight epsi...
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Published in | International archives of allergy and immunology Vol. 149; p. 73 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Basel
S. Karger AG
01.06.2009
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Subjects | |
Online Access | Get full text |
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Summary: | Background: Mast cells (MCs) play a central role in allergic reactions through high-affinity IgE receptor (Fc[straight epsilon]RI)-mediated responses. Many attempts have been performed to investigate MC functions, though molecular bases of the intracellular signaling cascade through Fc[straight epsilon]RI, especially in human MCs, remain scant and unexplored. Methods: Human MCs were differentiated from CD34+ cells by culture with stem cell factor, IL-6 and IL-3. The differential phosphorylation profiles of protein tyrosine residues in the resulting MCs with or without Fc[straight epsilon]RI aggregation were examined by two-dimensional gel electrophoresis. The candidate phosphoproteins of interest were picked, in-gel digested and mass spectrometry fingerprinted. Results: Approximately 40 proteins in MCs were phosphorylated on their tyrosine residues in response to activation and some of them were identified. Particularly IL-31 receptor α, solute carrier family 39, syntaxin 5 and heterogeneous nuclear ribonucleoprotein are newly identified as phosphoproteins that are potentially involved in the MC signaling cascade through Fc[straight epsilon]RI. Conclusion: Our present phosphoproteome data may provide the clue to understand the molecular mechanisms for the activation of human MCs. [PUBLICATION ABSTRACT] |
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ISSN: | 1018-2438 1423-0097 |