title: Prostaglandin E2 modulates dendritic cell function via EP2 and EP4 receptor subtypes.
abstract: We have reported previously that PGE(2) inhibits dendritic cells (DC) functions. Because E prostanoid receptor (EPR) subtypes involved in this action are unknown, expression and functions of these receptors were examined in DC. Western blot and flow cytometry analyses showed that all EPRs were coexpressed in DC. In a dose-dependent manner, lipopolysaccharide (LPS) enhanced EP(2)R/EP(4)R but not EP(1)R/EP(3)R expressions. NS-398, a cyclooxygenase (COX)-2-selective inhibitor, suppressed LPS-enhanced EP(2)R/EP(4)R expression, suggesting that COX-2-issued prostaglandin E(2) (PGE(2)) modulates DC function through stimulation of specific EPR subtypes. Using selective agonists, we found that butaprost, an EP(2)R agonist, and PGE(1) alcohol, an EP(2)R and EP(2)R/EP(4)R agonist, inhibited major histocompatibility complex class II expression and enhanced interleukin-10 production from DC. However, no effect was observed with sulprostone and 17-phenyl-omega-trinor-PGE(2), selective agonists for EP(1)R and EP(1)R/EP(3)R, respectively. Treatment of DC with dibutyryl cyclic adenosine monophosphate (cAMP), an analog of cAMP, mimics PGE(2)-induced, inhibitory effects. Taken together, our data demonstrate that EP(2)R/EP(4)R are efficient for mediating PGE(2)-induced modulation of DC functions.
authors.affiliation: Laboratoire d'Immunologie, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5540, Université de Bordeaux 2, Cedex, France. harizi33@yahoo.fr
authors.forename: Hedi
authors.initials: H
authors.lastname: Harizi
authors.forename: Christophe
authors.initials: C
authors.lastname: Grosset
authors.forename: Norbert
authors.initials: N
authors.lastname: Gualde
mesh_terms: D000818:Animals; D003994:Bucladesine / Q000494:pharmacology; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis; D003713:Dendritic Cells / Q000187:drug effects / Q000276:immunology*; D015232:Dinoprostone / Q000494:pharmacology*; D005260:Female; D006412:Hematopoietic Stem Cells / Q000502:physiology; D000949:Histocompatibility Antigens Class II / Q000378:metabolism; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D008810:Mice, Inbred C57BL; D018078:Receptors, Prostaglandin E / Q000378:metabolism / Q000502:physiology*; D058306:Receptors, Prostaglandin E, EP1 Subtype; D058307:Receptors, Prostaglandin E, EP2 Subtype; D058308:Receptors, Prostaglandin E, EP3 Subtype; D058309:Receptors, Prostaglandin E, EP4 Subtype
chemical_list: D016207:Cytokines; D000949:Histocompatibility Antigens Class II; C545636:Ptger1 protein, mouse; C545645:Ptger2 protein, mouse; C545648:Ptger3 protein, mouse; C545651:Ptger4 protein, mouse; D018078:Receptors, Prostaglandin E; D058306:Receptors, Prostaglandin E, EP1 Subtype; D058307:Receptors, Prostaglandin E, EP2 Subtype; D058308:Receptors, Prostaglandin E, EP3 Subtype; D058309:Receptors, Prostaglandin E, EP4 Subtype; D003994:Bucladesine; D015232:Dinoprostone