title: Effects of mPGES-1 deletion on eicosanoid and fatty acid profiles in mice.
abstract: mPGES-1 is considered an alternative target for anti-inflammatory treatment with improved selectivity and safety compared to NSAIDs. mPGES-1 depletion not only suppresses inflammation via absence of inducible PGE2 but might also cause an activation of anti-inflammatory pathways. We studied effects of mPGES-1 deletion on the eicosanoid and fatty acid (FA) profiles in mice. In LPS-induced peritoneal macrophages from mPGES-1 knock-out (mPGES-1-/-, KO) mice PGE2 production was markedly attenuated, whereas levels of PGD2 metabolites (15-deoxy-Δ(12,14) PGJ2 and 15-deoxy-Δ(12,14) PGD2) were increased compared to wild type mice. The levels of oxidized fatty acid 13-HODE were also significantly up-regulated in KO macrophages. Significant differences in the total lipid FA composition (decrease in monounsaturated FA and increase in eicosadienoic acid) were detected in spleen of KO and WT mice. These effects of mPGES-1 deletion on eicosanoid and fatty acid metabolism have important implications for future mPGES-1 inhibitors and deserve further investigation.
authors.affiliation: Rheumatology Unit, Department of Medicine, Karolinska Institutet, Sweden. Electronic address: Helena.Idborg@ki.se.
authors.forename: Helena
authors.initials: H
authors.lastname: Idborg
authors.forename: Petter
authors.initials: P
authors.lastname: Olsson
authors.forename: Patrick
authors.initials: P
authors.lastname: Leclerc
authors.forename: Joan
authors.initials: J
authors.lastname: Raouf
authors.forename: Per-Johan
authors.initials: PJ
authors.lastname: Jakobsson
authors.forename: Marina
authors.initials: M
authors.lastname: Korotkova
mesh_terms: D000818:Animals; D001921:Brain / Q000276:immunology / Q000378:metabolism; D002478:Cells, Cultured; D015777:Eicosanoids / Q000378:metabolism*; D005227:Fatty Acids / Q000378:metabolism*; D005229:Fatty Acids, Monounsaturated / Q000378:metabolism*; D019746:Intramolecular Oxidoreductases / Q000172:deficiency / Q000235:genetics*; D008041:Linoleic Acids / Q000378:metabolism*; D008070:Lipopolysaccharides / Q000494:pharmacology; D017737:Macrophages, Peritoneal / Q000276:immunology / Q000378:metabolism; D051379:Mice; D008811:Mice, Inbred DBA; D018345:Mice, Knockout; D015230:Prostaglandin D2 / Q000378:metabolism; D000071876:Prostaglandin-E Synthases; D013154:Spleen / Q000276:immunology / Q000378:metabolism; D015854:Up-Regulation
chemical_list: D015777:Eicosanoids; D005227:Fatty Acids; D005229:Fatty Acids, Monounsaturated; D008041:Linoleic Acids; D008070:Lipopolysaccharides; C024348:13-hydroxy-9,11-octadecadienoic acid; D019746:Intramolecular Oxidoreductases; D000071876:Prostaglandin-E Synthases; C000605865:Ptges protein, mouse; D015230:Prostaglandin D2
keywords: Eicosanoids; Fatty acids; Inflammation; Knock-out mice; Prostaglandins E(2); mPGES-1