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- W2080304653 abstract "Abstract Mast cells are key participants in allergic diseases via activation of high-affinity IgE receptors (FcϵRI) resulting in release of proinflammatory mediators. The biochemical pathways linking IgE activation to calcium influx and cytoskeletal changes required for intracellular granule release are incompletely understood. We demonstrate, genetically, that Pak1 is required for this process. In a passive cutaneous anaphylaxis experiment, Wsh/Wsh mast cell–deficient mice locally reconstituted with Pak1−/− bone marrow–derived mast cells (BMMCs) experienced strikingly decreased allergen-induced vascular permeability compared with controls. Consistent with the in vivo phenotype, Pak1−/− BMMCs exhibited a reduction in FcϵRI-induced degranulation. Further, Pak1−/− BMMCs demonstrated diminished calcium mobilization and altered depolymerization of cortical filamentous actin (F-actin) in response to FcϵRI stimulation. These data implicate Pak1 as an essential molecular target for modulating acute mast cell responses that contribute to allergic diseases." @default.
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- W2080304653 date "2009-03-19" @default.
- W2080304653 modified "2023-10-18" @default.
- W2080304653 title "p21-activated kinase regulates mast cell degranulation via effects on calcium mobilization and cytoskeletal dynamics" @default.
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- W2080304653 doi "https://doi.org/10.1182/blood-2008-06-160861" @default.
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