Exercise and genetic rescue of SCA1 via the transcriptional repressor Capicua.

Exercise and genetic rescue of SCA1 via the transcriptional repressor Capicua.
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DOI:
10.1126/science.1212673
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发表时间:
2011-11-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Zoghbi HY
Zoghbi HY
中科院分区:
其他
文献类型:
--
作者:
Fryer JD;Yu P;Kang H;Mandel-Brehm C;Carter AN;Crespo-Barreto J;Gao Y;Flora A;Shaw C;Orr HT;Zoghbi HY

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脊髓小脑性共济失调1型(SCA1)是一种致命的神经退行性疾病,由ataxin - 1(ATXN1)中一个可翻译的CAG重复序列的扩增引起。为了确定运动的长期影响,我们在SCA1小鼠模型中实施了一种适度的运动方案,发现存活率有显著提高,同时伴有表皮生长因子的上调以及Capicua(一种ATXN1相互作用蛋白)的相应下调。Capicua突变小鼠与SCA1小鼠交配产生的后代所有疾病表型都有显著改善。尽管多聚谷氨酰胺扩增的Atxn1导致Capicua功能部分丧失,但无论是通过基因手段还是运动进一步降低Capicua水平,都能减轻疾病表型。因此,运动可能对其他共济失调和神经退行性疾病具有长期的有益影响。
Spinocerebellar ataxia type 1 (SCA1) is a fatal neurodegenerative disease caused by expansion of a translated CAG repeat in Ataxin-1 (ATXN1). To determine the long-term effects of exercise, we implemented a mild exercise regimen in a mouse model of SCA1 and found a considerable improvement in survival accompanied by upregulation of epidermal growth factor and consequential downregulation of Capicua, an ATXN1 interactor. Offspring of Capicua mutant mice bred to SCA1 mice showed significant improvement of all disease phenotypes. Although polyglutamine-expanded Atxn1 caused some loss of Capicua function, further reducing Capicua levels, either genetically or by exercise, mitigated the disease phenotypes. Thus, exercise might have long-term beneficial effects in other ataxias and neurodegenerative diseases.
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