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• W1985248841 endingPage "31575" @default.
• W1985248841 startingPage "31565" @default.
• W1985248841 abstract "Dectin-1 recognizes β-glucan and plays important roles for the antifungal immunity through the activation of spleen tyrosine kinase (Syk) in dendritic cells or macrophages. Recently, expression of Dectin-1 was also identified in human and mouse mast cells, although its physiological roles were largely unknown. In this report, rat mast cell line RBL-2H3 was analyzed to investigate the molecular mechanism of Dectin-1-mediated activation and responses of mast cells. Treatment of cells with Dectin-1-specific agonist curdlan induced tyrosine phosphorylation of cellular proteins and the interaction of Dectin-1 with the Src homology 2 domain of Syk. These responses depended on tyrosine phosphorylation of the hemi-immunoreceptor tyrosine-based activation motif in the cytoplasmic tail of Dectin-1, whereas they were independent of the γ-subunit of high-affinity IgE receptor. DNA microarray and real-time PCR analyses showed that Dectin-1-mediated signaling stimulated gene expression of transcription factor Nfkbiz and inflammatory cytokines, such as monocyte chemoattractant protein-1, IL-3, IL-4, IL-13, and tumor necrosis factor (TNF)-α. The response was abrogated by pretreatment with Syk inhibitor R406. These results suggest that Syk is critical for Dectin-1-mediated activation of mast cells, although the signaling differs from that triggered by FcϵRI activation. In addition, these gene expressions induced by curdlan stimulation were specifically observed in mast cells, suggesting that Dectin-1-mediated signaling of mast cells offers new insight into the antifungal immunity." @default.
• W1985248841 created "2016-06-24" @default.
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• W1985248841 date "2014-11-01" @default.
• W1985248841 modified "2023-09-29" @default.
• W1985248841 title "Dectin-1-mediated Signaling Leads to Characteristic Gene Expressions and Cytokine Secretion via Spleen Tyrosine Kinase (Syk) in Rat Mast Cells" @default.
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• W1985248841 doi "https://doi.org/10.1074/jbc.m114.581322" @default.
• W1985248841 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4223353" @default.
• W1985248841 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25246527" @default.
• W1985248841 hasPublicationYear "2014" @default.
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