MIR146A inhibits JMJD3 expression and osteogenic differentiation in human mesenchymal stem cells.

MIR146A inhibits JMJD3 expression and osteogenic differentiation in human mesenchymal stem cells.
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DOI:
10.1016/j.febslet.2014.03.057
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发表时间:
2014-05-02
期刊:
影响因子:
3.5
通讯作者:
Payne CJ
Payne CJ
中科院分区:
生物学3区
文献类型:
--
作者:
Huszar JM;Payne CJ

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染色质重塑对细胞分化非常重要。组蛋白甲基转移酶EZH2和组蛋白去甲基酶JMJD3(KDM6B)调节组蛋白H3赖氨酸27三甲基化水平(H3K27me3)。这两个调节子之间的相互作用会影响干细胞的谱系特征。在这里,我们确定microRNA MIR146A是JMJD3的负调控因子。在人骨髓间充质干细胞(HMSCs)的成骨分化过程中,我们观察到JMJD3表达上调,MIR146A表达下调。阻断JMJD3活性诱导hMSCs分化可降低成骨基因RUNX2的转录水平。在细胞分化过程中,RUNX2启动子上的H3K27me3水平降低。MIR146A在hMSCs中表达的调节改变了JMJD3和RUNX2的表达,并影响了成骨分化。我们得出结论:JMJD3促进hMSCs分化成骨,MIR146A调控JMJD3。
Chromatin remodeling is important for cell differentiation. Histone methyltransferase EZH2 and histone demethylase JMJD3 (KDM6B) modulate levels of histone H3 lysine 27 trimethylation (H3K27me3). Interplay between the two modulators influence lineage specification in stem cells. Here, we identified microRNA MIR146A to be a negative regulator of JMJD3. In the osteogenic differentiation of human mesenchymal stem cells (hMSCs), we observed an upregulation of JMJD3 and a downregulation of MIR146A. Blocking JMJD3 activity in differentiating hMSCs reduced transcript levels of osteogenic gene RUNX2. H3K27me3 levels decreased at the RUNX2 promoter during cell differentiation. Modulation of MIR146A levels in hMSCs altered JMJD3 and RUNX2 expression and affected osteogenic differentiation. We conclude that JMJD3 promotes osteogenesis in differentiating hMSCs, with MIR146A regulating JMJD3.
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