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• W1627831743 abstract "The inflammatory mediator prostaglandin E(2) (PGE(2)) is implicated in the pathogenesis of chronic inflammatory diseases including periodontitis; it is synthesized by cyclooxygenases (COX) and the prostaglandin E synthases mPGES-1, mPGES-2, and cPGES. The distribution of PGES in gingival tissue of patients with periodontitis and the contribution of these enzymes to inflammation-induced PGE(2) synthesis in different cell types was investigated. In gingival biopsies, positive staining for PGES was observed in fibroblasts and endothelial, smooth muscle, epithelial, and immune cells. To further explore the contribution of PGES to inflammation-induced PGE(2) production, in vitro cell culture experiments were performed using fibroblasts and endothelial, smooth muscle, and mast cells. All cell types expressed PGES and COX-2, resulting in basal levels of PGE(2) synthesis. In response to tumor necrosis factor (TNF-α), IL-1β, and cocultured lymphocytes, however, mPGES-1 and COX-2 protein expression increased in fibroblasts and smooth muscle cells, accompanied by increased PGE(2), whereas mPGES-2 and cPGES were unaffected. In endothelial cells, TNF-α increased PGE(2) production only via COX-2 expression, whereas in mast cells the cytokines did not affect PGE(2) enzyme expression or PGE(2) production. Furthermore, PGE(2) production was diminished in gingival fibroblasts derived from mPGES-1 knockout mice, compared with wild-type fibroblasts. These results suggest that fibroblasts and smooth muscle cells are important sources of mPGES-1, which may contribute to increased PGE(2) production in the inflammatory condition periodontitis." @default.
• W1627831743 created "2016-06-24" @default.
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• W1627831743 date "2011-04-01" @default.
• W1627831743 modified "2023-10-14" @default.
• W1627831743 title "Expression of Prostaglandin E Synthases in Periodontitis" @default.
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• W1627831743 doi "https://doi.org/10.1016/j.ajpath.2010.12.048" @default.
• W1627831743 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3078457" @default.
• W1627831743 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21435451" @default.
• W1627831743 hasPublicationYear "2011" @default.
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