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- W2004055100 abstract "Polyunsaturated fatty acids (PUFAs) such as arachidonic acid (AA) have been shown to modulate a number of inflammatory disorders. Mast cells play a critical role in the initiation and maintenance of inflammatory responses. However, the effects of PUFAs on mast cell functions have not been fully addressed. We here–in examined the effects of PUFAs on the high affinity IgE receptor (FcεRI)–mediated mast cell activation using RBL-2H3 cells, a rat mast cell line, that were cultured in the medium containing palmitic acid (PA), AA, or the AA analogs mead acid (MA) and eicosapentaenoic acid (EPA). In AA-supplemented cells, the FcεRI-mediated β-hexosamidase and TNF-α release, calcium (Ca2+) influx, and some protein tyrosine phosphorylations including Syk and linker for activation of T cells (LAT) were enhanced, whereas, in MA- or PA-supplemented cells, they were not changed when compared with cells cultured in control medium. In EPA-supplemented cells, the enhancements of β-hexosamidase release and protein tyrosine phosphorylations were observed. Furthermore, in AA- or EPA-supplemented cells, FcεRI-mediated intracellular production of reactive oxygen species (ROS) that is required for the tyrosine phosphorylation of LAT and Ca2+ influx were enhanced when compared with the other cells. Thus, preincubation of AA or EPA augmented FcεRI-mediated degranulation in mast cells by affecting early events of FcεRI signal transduction, which might be associated with the change of fatty acid composition of the cell membrane and enhanced production of ROS. The results suggest that some PUFAs can modulate FcεRI-mediated mast cell activation and might affect FcεRI/mast cell-mediated inflammation, such as allergic reaction." @default.
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- W2004055100 date "2005-12-30" @default.
- W2004055100 modified "2023-10-03" @default.
- W2004055100 title "Effects of arachidonic acid analogs on FcεRI-mediated activation of mast cells" @default.
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- W2004055100 doi "https://doi.org/10.1016/j.bbalip.2005.11.005" @default.
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