MicroRNA-146a Contributes to SCI Recovery via Regulating TRAF6 and IRAK1 Expression.
MicroRNA-146a Contributes to SCI Recovery via Regulating TRAF6 and IRAK1 Expression.
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MicroRNA-146a 通过调节 TRAF6 和 IRAK1 表达促进 SCI 恢复。
DOI:
10.1155/2016/4013487
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发表时间:
2016
影响因子:
--
通讯作者:
Lin H
中科院分区:
文献类型:
--
作者:
Wei J;Wang J;Zhou Y;Yan S;Li K;Lin H
MicroRNA-146a participates in spinal cord injury (SCI) recovery. Until recently, how miRNA-146a participates in SCI remained unclear. In this study, we tried to explore the roles of miRNA-146a in the recovery of SCI using a rat model. The expression of the probable target genes of miRNA-146a (including IRAK1 and TARF6) as well as proinflammation cytokines were measured until 7 days after surgery in the three groups (sham group, SCI group, and miRNA-146a antagomir injection group). Also, the animals' motivations were estimated using Basso Beattie Bresnahan (BBB) during the whole experiment. A luciferase assay was performed to demonstrate that miRNA-146a could directly target the mRNAs of IRAK1 and TRAF6. Our experiments indicate that miRNA-146a inhibits proinflammatory cytokine secretion by suppressing IRAK1 and TRAF6 expression in the SCI model. In contrast, miRNA-146a may be upregulated by inflammatory mediators via the IRAK1/TRAF6 pathway in the spinal cord. As a negative feedback element, miRNA-146a could make sure that the expression of IRAK1- and TRAF6-mediated genes was under tight control. Thus, miRNA-146a may serve as a novel therapeutic target for SCI interventions.
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