Lipopolysaccharide induces macrophage migration via prostaglandin D(2) and prostaglandin E(2).
Lipopolysaccharide (LPS) produces prostaglandins (PGs) concomitant to eliciting macrophage migration. We evaluated the role of PGs in initiating the migration of macrophages, especially focusing on PGD(2) and PGE(2). In RAW264.7 macrophages, cyclooxygenase (COX)-2 inhibitor, CAY10404 [3-(4-methylsulphonylphenyl)-4-phenyl-5-trifluoromethylisoxazole], completely inhibited LPS-mediated migration at 4 h (early phase) but only partially inhibited the migration at 8 h (late phase), suggesting the presence of PG-dependent and -independent pathways. In the early phase, LPS up-regulated mRNA expressions of COX-2, hematopoietic PGD synthase (H-PGDS), and microsomal-PGE synthase 1, increasing PGD(2) and PGE(2) substantially. The chemoattractant receptor-homologous molecule expressed on Th2 lymphocytes (CRTH2) agonist, DK-PGD(2) (13-14-dihydro-15-keto-PGD(2)), and the EP4 agonist, ONO-AE1-329 (16-{3-methoxymethyl}phenyl-omega-tetranor-3,7-dithia-prostaglandin E(1)), but not selective agonists of D prostanoid receptor, E prostanoid receptor (EP) 2, or EP3, stimulated random migration (chemokinesis). In peritoneal macrophages from CRTH2-deficient and H-PGDS-deficient mice, LPS-mediated migration was significantly inhibited at either early or late phases of the migration. The H-PGDS inhibitor, HQL-79 [4-(diphenylmethoxy)-1-[3-(1H-tetrazol-5-yl)propyl-piperidine]], partially inhibited the migration of the RAW264.7 macrophage in both phases. These results suggest the importance of the PGD(2)/CRTH2 pathway in LPS-mediated migration of macrophages. In the late phase of migration, LPS up-regulated monocyte chemoattractant protein (MCP)-1 mRNA. The CC chemokine receptor (CCR2) antagonist, RS102895 [1'-[2-[4-(trifluoromethyl)phenyl]ethyl]-spiro[4H-3,1-benzoxazine-4,4'-piperidin]-2(1H)-one], inhibited LPS-mediated migration in the late phase without affecting the early phase. ONO-AE1-329, but not DK-PGD(2), up-regulated MCP-1 mRNA. Taken together, LPS stimulation of chemokinesis or chemotaxis, or both, occurs in macrophages via PGD(2) and PGE(2) in tandem arrangement; i.e., 1) LPS stimulates prostaglandin signaling, initiating early migration through the PGD(2)/CRTH2 and PGE(2)/EP4 signaling pathways; and 2) LPS leads induction of MCP-1, which contributes to later phase migration of the macrophages through the PGE(2)/EP4 pathway.
Tajima
Tsuyoshi
T
Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan.
Murata
Takahisa
T
Aritake
Kosuke
K
Urade
Yoshihiro
Y
Hirai
Hiroyuki
H
Nakamura
Masataka
M
Ozaki
Hiroshi
H
Hori
Masatoshi
M
D000818:Animals; D002460:Cell Line; D054443:Cell Migration Assays; D018932:Chemokine CCL2 / Q000096:biosynthesis; D002633:Chemotaxis / Q000187:drug effects*; D003470:Culture Media; D015232:Dinoprostone / Q000378:metabolism*; D019746:Intramolecular Oxidoreductases / Q000037:antagonists & inhibitors / Q000235:genetics; D054834:Lipocalins / Q000037:antagonists & inhibitors / Q000235:genetics; D008070:Lipopolysaccharides / Q000494:pharmacology*; D017737:Macrophages, Peritoneal / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology; D051379:Mice; D018345:Mice, Knockout; D015230:Prostaglandin D2 / Q000378:metabolism*; D011971:Receptors, Immunologic / Q000819:agonists / Q000235:genetics; D011982:Receptors, Prostaglandin / Q000819:agonists / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
C491768:Ccl2 protein, mouse; D018932:Chemokine CCL2; D003470:Culture Media; D054834:Lipocalins; D008070:Lipopolysaccharides; D011971:Receptors, Immunologic; D011982:Receptors, Prostaglandin; D019746:Intramolecular Oxidoreductases; C022466:prostaglandin R2 D-isomerase; D015232:Dinoprostone; D015230:Prostaglandin D2; C036293:prostaglandin D2 receptor