PMID- 23548612 OWN - NLM STAT- MEDLINE DCOM- 20130726 LR - 20130603 IS - 1522-1555 (Electronic) IS - 0193-1849 (Linking) VI - 304 IP - 11 DP - 2013 Jun 1 TI - Ceramide 1-phosphate induces macrophage chemoattractant protein-1 release: involvement in ceramide 1-phosphate-stimulated cell migration. PG - E1213-26 LID - 10.1152/ajpendo.00480.2012 [doi] AB - The bioactive sphingolipid ceramide 1-phosphate (C1P) is implicated in inflammatory responses and was recently shown to promote cell migration. However, the mechanisms involved in these actions are poorly described. Using J774A.1 macrophages, we have now discovered a new biological activity of C1P: stimulation of monocyte chemoattractant protein-1 (MCP-1) release. This novel effect of C1P was pertussis toxin (PTX) sensitive, suggesting the intervention of Gi protein-coupled receptors. Treatment of the macrophages with C1P caused activation of the phosphatidylinositol 3-kinase (PI3K)/Akt, mitogen-activated protein kinase kinase (MEK)/extracellularly regulated kinases (ERK), and p38 pathways. Inhibition of these kinases using selective inhibitors or specific siRNA blocked the stimulation of MCP-1 release by C1P. C1P stimulated nuclear factor-kappaB activity, and blockade of this transcription factor also resulted in complete inhibition of MCP-1 release. Also, C1P stimulated MCP-1 release and cell migration in human THP-1 monocytes and 3T3-L1 preadipocytes. A key observation was that sequestration of MCP-1 with a neutralizing antibody or treatment with MCP-1 siRNA abolished C1P-stimulated cell migration. Also, inhibition of the pathways involved in C1P-stimulated MCP-1 release completely blocked the stimulation of cell migration by C1P. It can be concluded that C1P promotes MCP-1 release in different cell types and that this chemokine is a major mediator of C1P-stimulated cell migration. The PI3K/Akt, MEK/ERK, and p38 pathways are important downstream effectors in this action. FAU - Arana, Lide AU - Arana L AD - Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spain. FAU - Ordonez, Marta AU - Ordonez M FAU - Ouro, Alberto AU - Ouro A FAU - Rivera, Io-Guane AU - Rivera IG FAU - Gangoiti, Patricia AU - Gangoiti P FAU - Trueba, Miguel AU - Trueba M FAU - Gomez-Munoz, Antonio AU - Gomez-Munoz A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130402 PL - United States TA - Am J Physiol Endocrinol Metab JT - American journal of physiology. Endocrinology and metabolism JID - 100901226 RN - 0 (Ceramides) RN - 0 (Chemokine CCL2) RN - 0 (ceramide 1-phosphate) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) RN - EC 2.7.11.25 (MAP Kinase Kinase Kinases) SB - IM MH - Cell Line MH - Cell Movement/drug effects/*physiology MH - Ceramides/*pharmacology MH - Chemokine CCL2/*metabolism MH - Humans MH - MAP Kinase Kinase Kinases/metabolism MH - Macrophages/drug effects/*metabolism MH - Monocytes/drug effects/*metabolism MH - Phosphatidylinositol 3-Kinases/metabolism MH - Signal Transduction/drug effects/*physiology MH - p38 Mitogen-Activated Protein Kinases/metabolism OTO - NOTNLM OT - ceramide 1-phosphate OT - macrophage migration OT - monocyte chemoattractant protein-1 release OT - sphingosine 1-phosphate EDAT- 2013/04/04 06:00 MHDA- 2013/07/28 06:00 CRDT- 2013/04/04 06:00 PHST- 2013/04/04 06:00 [entrez] PHST- 2013/04/04 06:00 [pubmed] PHST- 2013/07/28 06:00 [medline] AID - ajpendo.00480.2012 [pii] AID - 10.1152/ajpendo.00480.2012 [doi] PST - ppublish SO - Am J Physiol Endocrinol Metab. 2013 Jun 1;304(11):E1213-26. doi: 10.1152/ajpendo.00480.2012. Epub 2013 Apr 2.