miR-146a ameliorates liver ischemia/reperfusion injury by suppressing IRAK1 and TRAF6.
miR-146a ameliorates liver ischemia/reperfusion injury by suppressing IRAK1 and TRAF6.
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miR-146a 通过抑制 IRAK1 和 TRAF6 改善肝脏缺血/再灌注损伤。
DOI:
10.1371/journal.pone.0101530
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Kong L
中科院分区:
文献类型:
--
作者:
Jiang W;Kong L;Ni Q;Lu Y;Ding W;Liu G;Pu L;Tang W;Kong L
A critical role of the Toll-like receptor(TLR) and its downstream molecules, including IL-1 receptor-associated kinase 1(IRAK1) and tumor necrosis factor receptor– associated factor 6(TRAF6), in the pathogenesis of liver ischemia/reperfusion (I/R) injury has been documented. Recently a microRNA, miR-146a, was identified as a potent negative regulator of the TLR signaling pathway. In this study, we investigated the role of miR-146a to attenuate TLR signaling and liver I/R injury in vivo and in vitro. miR-146a was decreased in mice Kupffer cells following hepatic I/R, whereas IRAK1 and TRAF6 increased. Overexpression of miR-146a directly decreased IRAK1 and TRAF6 expression and attenuated the release of proinflammatory cytokines through the inactivation of NF-κB P65 in hypoxia/reoxygenation (H/R)-induced macrophages, RAW264.7 cells. Knockdown experiments demonstrated that IRAK1 and TRAF6 are two potential targets for reducing the release of proinflammatory cytokines. Moreover, co-culture assays indicated that miR-146a decreases the apoptosis of hepatocytes after H/R. In vivo administration of Ago-miR-146a, a stable version of miR-146a in vivo, protected against liver injury in mice after I/R via inactivation of the TLR signaling pathway. We conclude that miR-146a ameliorates liver ischemia/reperfusion injury in vivo and hypoxia/reoxygenation injury in vitro by directly suppressing IRAK1 and TRAF6.
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