Long non-coding RNA ROR decoys gene-specific histone methylation to promote tumorigenesis.

Long non-coding RNA ROR decoys gene-specific histone methylation to promote tumorigenesis.
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长非编码 RNA ROR 诱骗基因特异性组蛋白甲基化以促进肿瘤发生。

DOI:
10.1186/s13059-015-0705-2
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发表时间:
2015-07-14
期刊:
影响因子:
12.3
通讯作者:
Fan X
Fan X
中科院分区:
生物学1区
文献类型:
--
作者:
Fan J;Xing Y;Wen X;Jia R;Ni H;He J;Ding X;Pan H;Qian G;Ge S;Hoffman AR;Zhang H;Fan X

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长链非编码RNA(lncRNA)不翻译成蛋白质,最初被认为是基因组“暗物质”的一部分。最近,已经表明lncRNA在染色质修饰复合物的募集中起作用,并且可以影响基因表达。然而,目前尚不清楚lncRNA是否以类似的方式在癌症中发挥作用。在这里,我们表明,lncRNA ROR占据并激活TESC启动子通过排斥组蛋白G9 A甲基转移酶和促进组蛋白H3 K9甲基化的释放。肿瘤中ROR的抑制导致TESC表达沉默,并且TESC启动子中G9 A介导的组蛋白H3 K9甲基化被恢复,这显著降低了肿瘤生长和转移。在没有ROR沉默的情况下,TESC敲低在肿瘤进展中表现出一致且显著的减少。我们的研究结果揭示了一种新的机制,通过这种机制,ROR可以作为诱饵癌RNA,阻断结合表面,防止组蛋白修饰酶的招募,从而指定一种新的组蛋白修饰模式,促进肿瘤发生。本文的在线版本(doi:10.1186/s13059-015-0705-2)包含补充材料,可供授权用户使用。
Long non-coding RNAs (lncRNAs) are not translated into proteins and were initially considered to be part of the ‘dark matter’ of the genome. Recently, it has been shown that lncRNAs play a role in the recruitment of chromatin modifying complexes and can influence gene expression. However, it is unknown if lncRNAs function in a similar way in cancer. Here, we show that the lncRNA ROR occupies and activates the TESC promoter by repelling the histone G9A methyltransferase and promoting the release of histone H3K9 methylation. Suppression of ROR in tumors results in silencing of TESC expression, and G9A-mediated histone H3K9 methylation in the TESC promoter is restored, which significantly reduces tumor growth and metastasis. Without ROR silencing, TESC knockdown presents consistent and significant reductions in tumor progression. Our results reveal a novel mechanism by which ROR may serve as a decoy oncoRNA that blocks binding surfaces, preventing the recruitment of histone modifying enzymes, thereby specifying a new pattern of histone modifications that promote tumorigenesis. The online version of this article (doi:10.1186/s13059-015-0705-2) contains supplementary material, which is available to authorized users.
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