miR-181 targets multiple Bcl-2 family members and influences apoptosis and mitochondrial function in astrocytes.

miR-181 targets multiple Bcl-2 family members and influences apoptosis and mitochondrial function in astrocytes.
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DOI:
10.1016/j.mito.2011.09.001
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发表时间:
2012-03
期刊:
影响因子:
4.4
通讯作者:
Giffard, Rona G.
Giffard, Rona G.
中科院分区:
生物学3区
文献类型:
--
作者:
Ouyang, Yi-Bing;Lu, Yu;Yue, Sibiao;Giffard, Rona G.

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线粒体是执行细胞凋亡的中心,而促凋亡蛋白和抗凋亡蛋白的Bcl2蛋白家族与线粒体相互作用,调节细胞凋亡。利用生物信息学预测,脑内表达的microRNA miR-181可以靶向Bcl2家族成员Bcl2-L11/Bim、Mcl-1和Bcl2的3‘UTRs。使用荧光素酶报告实验,我们确认了这些靶点。我们使用MIMIC和抑制剂改变了原代星形胶质细胞培养中miR-181a的水平,发现miR-181a的减少与Bcl2和Mcl-1蛋白水平的增加有关。降低miR-181a水平可减少缺糖诱导的星形胶质细胞的凋亡、线粒体功能障碍和线粒体膜电位的丧失。
Mitochondria are central to the execution of apoptosis, and the Bcl-2 protein family of pro- and anti-apoptotic proteins interacts with mitochondria to regulate apoptosis. Using bioinformatics we predicted that miR-181, a microRNA expressed in brain, could target the 3′UTRs of Bcl-2 family members Bcl-2-L11/Bim, Mcl-1, and Bcl-2. Using the luciferase reporter assay we confirmed these targets. We used mimic and inhibitor to alter miR-181a levels in primary astrocyte cultures and found miR-181a reduction was associated with increased Bcl-2 and Mcl-1 protein levels. Decreased miR-181a levels reduced glucose deprivation induced apoptosis, mitochondrial dysfunction, and loss of mitochondrial membrane potential in astrocytes.
DOI: 10.1038/jcbfm.2008.157
发表时间: 2009-04
期刊: Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism
影响因子: --
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