Soluble Epoxide Hydrolase Inhibitor Suppresses the Expression of Triggering Receptor Expressed on Myeloid Cells-1 by Inhibiting NF-kB Activation in Murine Macrophage.
Soluble Epoxide Hydrolase Inhibitor Suppresses the Expression of Triggering Receptor Expressed on Myeloid Cells-1 by Inhibiting NF-kB Activation in Murine Macrophage.
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可溶性环氧化物水解酶抑制剂通过抑制小鼠巨噬细胞中 NF-kB 的激活来抑制骨髓细胞 1 上表达的触发受体的表达
DOI:
10.1007/s10753-016-0448-6
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发表时间:
2017-03
期刊:
影响因子:
5.1
通讯作者:
Guan CX
中科院分区:
文献类型:
--
作者:
Dong L;Zhou Y;Zhu ZQ;Liu T;Duan JX;Zhang J;Li P;Hammcok BD;Guan CX
Triggering receptors expressed on myeloid cell-1 (TREM-1) is a superimmunoglobulin receptor expressed on myeloid cells. TREM-1 amplifies the inflammatory response. Epoxyeicosatrienoic acids (EETs), the metabolites of arachidonic acid derived from the cytochrome P450 enzyme, have anti-inflammatory properties. However, the effects of EETs on TREM-1 expression under inflammatory stimulation remain unclear. Therefore, inhibition of soluble epoxide hydrolase (sEH) with a highly selective inhibitor [1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea, TPPU] was used to stabilize EETs. LPS was intratracheally injected into mice to induce pulmonary inflammation, after TPPU treatment for 3 h. Histological examination showed TPPU treatment-alleviated LPS-induced pulmonary inflammation. TPPU decreased TREM-1 expression, but not DAP12 or MyD88 expression. Murine peritoneal macrophages were challenged with LPS in vitro. We found that TPPU reduced LPS-induced TREM-1 expression in a dose-dependent manner, but not DAP12 or MyD88 expression. TPPU also decreased downstream signal from TREM-1, reducing pro-inflammatory cytokineTNF-αandIL-1βmRNA expression. Furthermore, TPPU treatment inhibited IkB degradationin vivoandin vitro. Our results indicate that the inhibition of sEH suppresses LPS-induced TREM-1 expression and inflammationviainhibiting NF-kB activation in murine macrophage.
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