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- W2022223608 abstract "Sphingosine 1-phosphate (S1P), a bioactive lipid mediator, has been shown to be increased in bronchoalveolar lavage fluid after allergen challenge in asthmatic patients. Here, we examined S1P actions and their intracellular signalings in cultured human bronchial smooth muscle cells (BSMCs). Expression of mRNAs of three subtypes of S1P receptors, including S1P1, S1P2, and S1P3, was detected in BSMCs, and exposure of the cells to S1P inhibited platelet-derived growth factor (PDGF)-induced migration and tumor necrosis factor-α-induced RANTES production. S1P also inhibited PDGF-induced Rac1 activation, and dominant negative Rac1 inhibited PDGF-induced migration. On the other hand, dominant negative Gαq attenuated the S1P-induced inhibition of RANTES production. Finally, an S1P2-selective antagonist, JTE-013, suppressed the S1P-induced inhibition of migration response and RANTES production. These results suggest that S1P attenuates cell migration by inhibiting a Rac1-dependent signaling pathway and decreases RANTES production by stimulating a Gαq-dependent mechanism both possibly through the S1P2 receptors." @default.
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- W2022223608 date "2005-06-01" @default.
- W2022223608 modified "2023-10-16" @default.
- W2022223608 title "Sphingosine 1-phosphate inhibits migration and RANTES production in human bronchial smooth muscle cells" @default.
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- W2022223608 doi "https://doi.org/10.1016/j.bbrc.2005.03.223" @default.
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