title: Sphingosine-1-phosphate differently regulates the cytokine production of IL-12, IL-23 and IL-27 in activated murine bone marrow derived dendritic cells.
abstract: Sphingosine-1-phosphate (S1P) modulates many cell functions such as lymphocyte trafficking and signaling as well as keratinocyte proliferation. However, less is known about the specific effects of S1P on cytokine production, particularly on the interaction between dendritic cells (DCs) and keratinocytes, cell types which are crucial for the initiation and maintenance of chronic inflammatory skin diseases like atopic dermatitis or psoriasis. Especially the cytokines of the IL-12 family play a dominant role in many inflammatory diseases as they have a significant impact on T-helper cell function. In the present study we show that S1P decreased the production of the pro-inflammatory cytokines IL-12 and IL-23 in LPS-stimulated DCs via the common subunit p40 as well as in the crosstalk with activated keratinocytes. By using specific S1P receptor agonists (SEW2871, FTY720-P) and antagonist (JTE013) we identified an important role for S1P receptor 1 in the modulation of the cytokine profile. While diminishing IL-12 and IL-23 secretion, S1P enhanced IL-27 production in DCs. To elucidate the mechanism of the different impact on the IL-12 family cytokine production, we investigated the mitogen-activated protein kinase (MAPK) and phosphatidylinositide 3-kinase (PI3K) pathways in DCs. By using specific MAPK-Inhibitors (U0126, SB202190, SP600125) we demonstrated that ERK, p38 and JNK differently regulate each pathway of each cytokine. While p38 and JNK did not seem to play a role in the modulation properties of S1P on cytokine production, ERK is at least partially involved in the S1P mediated modulation of IL-12 and IL-27. The PI3K-Inhibitor abrogated the S1P-induced decrease of IL-12 and IL-23 secretion, while it had no influence on the S1P-induced increase of IL-27 production. These data implicate, that S1P has an anti-inflammatory impact on the production of IL-12 family cytokines, indicating therapeutic potential for S1P treatment of several inflammatory diseases like psoriasis.
authors.affiliation: Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany. Electronic address: katrin.schaper@tiho-hannover.de.
authors.forename: Katrin
authors.initials: K
authors.lastname: Schaper
authors.affiliation: Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany. Electronic address: manfred.kietzmann@tiho-hannover.de.
authors.forename: Manfred
authors.initials: M
authors.lastname: Kietzmann
authors.affiliation: College of Veterinary Medicine, Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, NC, USA. Electronic address: wbaeumer@ncsu.edu.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Bäumer
mesh_terms: D000730:Androstadienes / Q000494:pharmacology; D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D004791:Enzyme Inhibitors / Q000494:pharmacology; D015870:Gene Expression / Q000187:drug effects; D015151:Immunoblotting; D018664:Interleukin-12 / Q000096:biosynthesis*; D053759:Interleukin-23 / Q000096:biosynthesis*; D064094:Interleukin-27 / Q000096:biosynthesis*; D008070:Lipopolysaccharides / Q000494:pharmacology; D008246:Lysophospholipids / Q000494:pharmacology*; D051379:Mice; D008807:Mice, Inbred BALB C; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism; D010069:Oxadiazoles / Q000494:pharmacology; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism; D000081082:Phosphoinositide-3 Kinase Inhibitors; D010766:Phosphorylation / Q000187:drug effects; D011720:Pyrazoles / Q000494:pharmacology; D011725:Pyridines / Q000494:pharmacology; D049349:Receptors, Lysosphingolipid / Q000819:agonists / Q000037:antagonists & inhibitors / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015398:Signal Transduction / Q000187:drug effects; D013110:Sphingosine / Q000031:analogs & derivatives* / Q000494:pharmacology; D013876:Thiophenes / Q000494:pharmacology; D000077191:Wortmannin; D048051:p38 Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism
chemical_list: D000730:Androstadienes; D004791:Enzyme Inhibitors; D018664:Interleukin-12; D053759:Interleukin-23; D064094:Interleukin-27; D008070:Lipopolysaccharides; D008246:Lysophospholipids; D020928:Mitogen-Activated Protein Kinases; D010069:Oxadiazoles; D019869:Phosphatidylinositol 3-Kinases; D000081082:Phosphoinositide-3 Kinase Inhibitors; D011720:Pyrazoles; D011725:Pyridines; D049349:Receptors, Lysosphingolipid; D013110:Sphingosine; D013876:Thiophenes; D000077191:Wortmannin; D048051:p38 Mitogen-Activated Protein Kinases; C471998:JTE 013; C503964:SEW2871; C060506:sphingosine 1-phosphate
keywords: Dendritic cells; IL-12; IL-23; IL-27; MAPK; Sphingosine-1-phosphate