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• W2100041813 endingPage "4249" @default.
• W2100041813 startingPage "4237" @default.
• W2100041813 abstract "Sphingosine-1-phosphate (S1P), a bioactive sphingolipid metabolite, is the ligand for five specific G protein-coupled receptors, named S1P(1) to S1P(5). In this study, we found that cross-communication between platelet-derived growth factor receptor and S1P(2) serves as a negative damper of PDGF functions. Deletion of the S1P(2) receptor dramatically increased migration of mouse embryonic fibroblasts toward S1P, serum, and PDGF but not fibronectin. This enhanced migration was dependent on expression of S1P(1) and sphingosine kinase 1 (SphK1), the enzyme that produces S1P, as revealed by downregulation of their expression with antisense RNA and small interfering RNA, respectively. Although S1P(2) deletion had no significant effect on tyrosine phosphorylation of the PDGF receptors or activation of extracellular signal-regulated kinase 1/2 or Akt induced by PDGF, it reduced sustained PDGF-dependent p38 phosphorylation and markedly enhanced Rac activation. Surprisingly, S1P(2)-null cells not only exhibited enhanced proliferation but also markedly increased SphK1 expression and activity. Conversely, reintroduction of S1P(2) reduced DNA synthesis and expression of SphK1. Thus, S1P(2) serves as a negative regulator of PDGF-induced migration and proliferation as well as SphK1 expression. Our results suggest that a complex interplay between PDGFR and S1P receptors determines their functions." @default.
• W2100041813 created "2016-06-24" @default.
• W2100041813 creator A5009747871 @default.
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• W2100041813 date "2005-05-01" @default.
• W2100041813 modified "2023-10-16" @default.
• W2100041813 title "The S1P₂ Receptor Negatively Regulates Platelet-Derived Growth Factor-Induced Motility and Proliferation" @default.
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• W2100041813 doi "https://doi.org/10.1128/mcb.25.10.4237-4249.2005" @default.
• W2100041813 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1087716" @default.
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