Epigenetic changes and non-coding expanded repeats.

Epigenetic changes and non-coding expanded repeats.
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DOI:
10.1016/j.nbd.2010.02.004
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发表时间:
2010-07
影响因子:
6.1
通讯作者:
Thornton C
Thornton C
中科院分区:
医学1区
文献类型:
--
作者:
Nakamori M;Thornton C

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许多神经遗传疾病是由串联重复序列的不稳定扩展引起的。一些致病突变位于基因的非蛋白质编码区。当病理扩增时,这些重复可以触发局灶性表观遗传变化,抑制突变等位基因的表达。当突变基因不被抑制时,含有扩增重复序列的转录本可以引起突变RNA的毒性功能获得。这两种机制,异染色质介导的基因抑制和RNA优势,产生了广泛的神经发育和神经退行性异常。在这里,我们回顾了由非编码重复扩增引起的基因失调的机制,以及一些这些疾病可能被证明对治疗干预有反应的早期迹象。
Many neurogenetic disorders are caused by unstable expansions of tandem repeats. Some of the causal mutations are located in non-protein-coding regions of genes. When pathologically expanded, these repeats can trigger focal epigenetic changes that repress the expression of the mutant allele. When the mutant gene is not repressed, the transcripts containing the expanded repeat can give rise to a toxic gain-of-function by the mutant RNA. These two mechanisms, heterochromatin-mediated gene repression and RNA dominance, produce a wide range of neurodevelopmental and neurodegenerative abnormalities. Here we review the mechanisms of gene dysregulation induced by non-coding repeat expansions, and early indications that some of these disorders may prove to be responsive to therapeutic intervention.
能够在体外抑制(CUG)重复RNA-MBNL1相互作用的分子的动态组合选择:发现靶向肌发育症的铅化合物(DM1)。
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