Reducing levels of toxic RNA with small molecules.

Reducing levels of toxic RNA with small molecules.
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DOI:
10.1021/cb400431f
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发表时间:
2013-11-15
影响因子:
4
通讯作者:
Berglund JA
Berglund JA
中科院分区:
生物学2区
文献类型:
--
作者:
Coonrod LA;Nakamori M;Wang W;Carrell S;Hilton CL;Bodner MJ;Siboni RB;Docter AG;Haley MM;Thornton CA;Berglund JA

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强直性肌营养不良(DM)是肌营养不良症最常见的形式之一。糖尿病是一种由毒性功能获得RNA引起的常染色体显性遗传疾病。毒性RNA由扩增的非编码CTG/CCTG重复序列产生,并且这些CUG/CCUG重复序列隔离肌盲样(MBNL)RNA结合蛋白家族。MBNL蛋白是选择性剪接的调节因子,其螯合作用与DM中的错误剪接事件有关。先前报道的小分子筛选发现,喷他脒能够改善与DM相关的剪接缺陷。该疾病的生物化学实验和细胞及小鼠模型研究表明,喷他脒和相关化合物可能通过结合CTG*CAG重复DNA来抑制转录。对喷他脒的一系列亚甲基接头类似物的分析表明,在DM 1小鼠模型中,庚他脒逆转剪接缺陷并挽救肌强直。
Myotonic dystrophy (DM) is one of the most common forms of muscular dystrophy. DM is an autosomal dominant disease caused by a toxic gain of function RNA. The toxic RNA is produced from expanded non-coding CTG/CCTG repeats, and these CUG/CCUG repeats sequester the Muscleblind-like (MBNL) family of RNA binding proteins. The MBNL proteins are regulators of alternative splicing, and their sequestration has been linked with mis-splicing events in DM. A previously reported screen for small molecules found that pentamidine was able to improve splicing defects associated with DM. Biochemical experiments and cell and mouse model studies of the disease indicate that pentamidine and related compounds may work through binding the CTG*CAG repeat DNA to inhibit transcription. Analysis of a series of methylene linker analogs of pentamidine revealed that heptamidine reverses splicing defects and rescues myotonia in a DM1 mouse model.
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