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• W2885229623 startingPage "e0006647" @default.
• W2885229623 abstract "Sphingosine-1-phosphate (S1P) is a crucial regulator of a wide array of cellular processes, such as apoptosis, cell proliferation, migration, and differentiation, but its role in Leishmania donovani infection is unknown.In the present study, we observed that L. donovani infection in THP-1 derived macrophages (TDM) leads to decrease in the expression of S1pr2 and S1pr3 at mRNA level. We further observed that Leishmania infection inhibits the phosphorylation of sphingosine kinase 1 (sphK1) in a time-dependent manner. Exogenous S1P supplementation decreases L. donovani induced ERK1/2 phosphorylation and increases p38 phosphorylation in TDM, resulting in a decrease in the intracellular parasite burden in a dose-dependent manner. On the other hand, sphK inhibition by DMS increases ERK1/2 phosphorylation leading to increased IL-10 and parasite load. To gain further insight, cytokines expression were checked in S1P supplemented TDM and we observed increase in IL-12, while decrease IL-10 expression at mRNA and protein levels. In addition, treatment of antagonist of S1PR2 and S1PR3 such as JTE-013 and CAY10444 respectively enhanced Leishmania-induced ERK1/2 phosphorylation and parasite load.Our overall study not only reports the significant role of S1P signaling during L. donovani infection but also provides a novel platform for the development of new drugs against Leishmaniasis." @default.
• W2885229623 created "2018-08-22" @default.
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• W2885229623 date "2018-08-17" @default.
• W2885229623 modified "2023-10-15" @default.
• W2885229623 title "Sphingosine-1-phosphate signaling in Leishmania donovani infection in macrophages" @default.
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• W2885229623 doi "https://doi.org/10.1371/journal.pntd.0006647" @default.
• W2885229623 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6118390" @default.
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