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LncRNA NEAT1 reversed the hindering effects of miR-495-3p/STAT3 axis and miR-211/PI3K/AKT axis on sepsis-relevant inflammation.

Mol. Immunol.2020 Jan;117:168-179. Epub 2019 Dec 05
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摘要


OBJECTIVE:This investigation was intended to elucidate lncRNA-miRNA networks that could explain inflammation underlying sepsis progression. METHODS:In the first place, four kinds of mice models were established, namely, SHAM group (n = 30), trauma (TH) group (n = 30), lipopolysaccharide (LPS) group (n = 30) and TH + LPS group (n = 30). Their lung, spleen and liver tissues were gathered for determination of TNF-α, IL-6, IL-10 and MCP-1 levels. Furthermore, mouse mononuclear macrophage leukemia cell line (RAW264.7) was stimulated by LPS to establish inflammation cell models. Then si-NEAT1s, pcDNA3.1-NEAT1, miR-495-3p mimic, miR-495-3p inhibitor, miR-NC, miR-211 mimic and miR-211 inhibitor were, respectively, transfected into the cells, so as to observe the impacts of NEAT1, miR-495-3p and miR-211 on cytokine levels released by the cells. RESULTS:The survival condition of mice in the TH + LPS group was undesirable, in relative to mice in the LPS group and SHAM group (both P < 0.05). High-level NEAT1 and low-level miR-495-3p/miR-211 were associated with poor survival of mice in the TH+LPS group (P < 0.05). Additionally, the correlation between NEAT1/miR-495-3p/miR-211 level and cytokine level was the strongest among TH+LPS-treated mice, in comparison to mice treated by TH or LPS. Furthermore, up-regulation of NEAT1 level and down-regulation of miR-495-3p/miR-211 level could aggravate inflammation in LPS-treated RAW264.7 cells. The miR-495-3p and miR-211 herein, were both subjected to sponging of NEAT1, possibly affected inflammation responses in RAW264.7 cells, respectively, through modulating and PI3K/AKT signaling. CONCLUSION:LncRNA NEAT1 exhibited great potential sepsis diagnosis and treatment, considering its modifying axis and miR-211/PI3K/AKT axis in inflammation cell models.

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