Morpholino-mediated Knockdown of DUX4 Toward Facioscapulohumeral Muscular Dystrophy Therapeutics.

Morpholino-mediated Knockdown of DUX4 Toward Facioscapulohumeral Muscular Dystrophy Therapeutics.
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DOI:
10.1038/mt.2016.111
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发表时间:
2016-08
期刊:
Molecular therapy : the journal of the American Society of Gene Therapy
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骨骼肌中 DUX4 的去抑制已成为面肩肱型肌营养不良症 (FSHD) 病理学的可能原因。在这里,我们报告了使用反义磷酸二酰胺吗啉寡核苷酸来抑制 FSHD 肌管和异种移植物中 DUX4 的表达和功能。最有效的是磷酸二酰胺吗啉代寡核苷酸 FM10,它针对 DUX4 的聚腺苷酸化信号。 FM10没有明显的细胞毒性,FSHD和对照肌管的RNA-seq分析显示FM10下调了DUX4的许多转录靶标,而没有明显的脱靶效应。将 FM10 电穿孔至小鼠 FSHD 患者肌肉异种移植物中也下调了 DUX4 和 DUX4 靶标。这些发现证明了反义二酰胺磷酸吗啉寡核苷酸作为 FSHD 治疗选择的潜力。
Derepression of DUX4 in skeletal muscle has emerged as a likely cause of pathology in facioscapulohumeral muscular dystrophy (FSHD). Here we report on the use of antisense phosphorodiamidate morpholino oligonucleotides to suppress DUX4 expression and function in FSHD myotubes and xenografts. The most effective was phosphorodiamidate morpholino oligonucleotide FM10, which targets the polyadenylation signal of DUX4. FM10 had no significant cell toxicity, and RNA-seq analyses of FSHD and control myotubes revealed that FM10 down-regulated many transcriptional targets of DUX4, without overt off-target effects. Electroporation of FM10 into FSHD patient muscle xenografts in mice also down-regulated DUX4 and DUX4 targets. These findings demonstrate the potential of antisense phosphorodiamidate morpholino oligonucleotides as an FSHD therapeutic option.
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