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第44卷第12期 南京医科大学学报(自然科学版)
2024年12月 Journal of Nanjing Medical University(Natural Sciences) ·1657 ·
·基础研究·
miR⁃146a通过抑制TRAF6减轻缺氧诱导的巨噬细胞炎症反应
蒋承烨 ,倪明明 ,孙 尧 ,高庆文 ,孔亮亮 ,季 易 ,郭宏丽 1*
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南京医科大学附属儿童医院药学部,烧伤整形科,江苏 南京 210008
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[摘 要] 目的:探讨miR⁃146a在缺氧诱导巨噬细胞炎症反应中的作用。方法:建立体外巨噬细胞缺氧⁃复氧模型,检测缺氧
诱导巨噬细胞中miR⁃146a/肿瘤坏死因子受体相关因子6(tumor necrosis factor receptor⁃associated factor 6,TRAF6)的表达水平
及炎症因子、活性氧的变化,并在巨噬细胞中过表达或抑制miR⁃146a,分析其对巨噬细胞炎症反应的作用。结果:缺氧诱导巨
噬细胞中miR⁃146a表达下降,同时,TRAF6以及炎症因子、活性氧表达升高。过表达miR⁃146a通过直接靶向结合TRAF6减少
TRAF6的表达,从而减轻巨噬细胞炎症因子及活性氧的释放,然而,转染miR⁃146a抑制剂增加TRAF6的蛋白水平,增强炎症反
应。结论:上调miR⁃146a的表达可直接抑制TRAF6,减轻缺氧诱导巨噬细胞的炎症反应。新的针对miR⁃146a治疗策略可能有
利于减轻缺血再灌注时巨噬细胞释放的炎症因子及活性氧导致的损伤。
[关键词] miR⁃146a;缺氧;巨噬细胞;炎症反应;活性氧
[中图分类号] R364 [文献标志码] A [文章编号] 1007⁃4368(2024)12⁃1657⁃06
doi:10.7655/NYDXBNSN240832
miR ⁃ 146a mitigates hypoxia ⁃ induced inflammatory responses in macrophages by
suppressing TRAF6
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JIANG Chengye ,NI Mingming ,SUN Yao ,GAO Qingwen ,KONG Liangliang ,JI Yi ,GUO Hongli 1*
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1 Department of Pharmacy,Department of Burns and Plastic Surgery,Children’s Hospital of Nanjing Medical
University,Nanjing 210008,China
[Abstract] Objective:To explore the role of microRNA ⁃ 146a(miR ⁃ 146a)in hypoxia induced inflammatory responses in
macrophages. Methods:The expression of miR⁃146a/tumor necrosis factor receptor⁃associated factor 6(TRAF6),inflammatory factors
and reactive oxygen species(ROS)in macrophages were determined under hypoxia ⁃ reoxygenation model. Moreover,release of
inflammatory factors and ROS were analyzed after mimic or inhibitor of miR ⁃ 146a. Results:The miR ⁃ 146a expression level was
obviously decreased in hypoxia induced macrophages,while the expression of TRAF6,inflammatory factors and ROS increased.
Overexpression of miR⁃146a directly targeted and decreased TRAF6 expression and reduced the release of inflammatory factors and
ROS,however,transfection with miR⁃146a inhibitor increased the levels of TRAF6 and promoted inflammatory response. Conclusion:
Overexpression of miR⁃146a attenuates the inflammation response in hypoxia induced macrophages by directly targeting the TRAF6
gene. New treatment strategies targeting miR⁃146a may help reduce ischemia⁃reperfusion injury caused by inflammatory factors and
ROS in macrophages.
[Key words] miR⁃146a;hypoxia;macrophage;inflammatory response;ROS
[J Nanjing Med Univ,2024,44(12):1657⁃1661,1689]
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缺血再灌注损伤(ischemia ⁃ reperfusion injury, 肝脏、肢体等 。缺血再灌注早期,相关免疫细胞尤
IRI)可发生在多种组织器官中,包括脑、肾脏、心脏、 其是巨噬细胞被激活,释放多种炎症因子、化学分
子、活性氧(reactive oxygen species,ROS),从而引起
[基金项目] 国家自然科学基金(81800530) 缺血再灌注后期中性粒细胞的浸润和细胞的凋亡,
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∗ 导致组织坏死 。目前 IRI 过程中免疫细胞参与的
通信作者(Corresponding author),E⁃mail:salmon0724@163.com

