Neuronal Nuclear Membrane Budding Occurs during a Developmental Window Modulated by Torsin Paralogs.

Neuronal Nuclear Membrane Budding Occurs during a Developmental Window Modulated by Torsin Paralogs.
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DOI:
10.1016/j.celrep.2016.08.044
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发表时间:
2016-09-20
期刊:
影响因子:
8.8
通讯作者:
Dauer WT
Dauer WT
中科院分区:
生物学1区
文献类型:
--
作者:
Tanabe LM;Liang CC;Dauer WT

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DYT1肌张力障碍是一种神经发育疾病,在儿童时期表现出来。这种疾病是由扭蛋白A功能受损引起的,扭蛋白A是一种与核膜萌发有关的蛋白质。NE的萌发与神经发育和中枢神经系统功能的关系尚不清楚,然而,它在肌张力障碍发病机制中的潜在作用尚不清楚。我们发现,在活体TorsinA缺失神经元中,去甲肾上腺素的萌发开始并在离散的神经发育窗口中消失。NE发芽的发育性分解对应于TorsinB蛋白的增加,而从TorsinA无效神经元中去除TorsinB阻止发芽分解并导致致命性神经功能障碍。TorsinB的发育变化也与DYT1胚胎干细胞分化过程中NE芽的形成有关,TorsinA或TorsinB的过表达挽救了该系统中NE芽的形成。这些发现确定了TorsinA神经发育窗,对于正常的中枢神经系统功能是必不可少的,并对肌张力障碍的发病机制和治疗具有重要意义。
DYT1 dystonia is a neurodevelopmental disease that manifests during a discrete period of childhood. The disease is caused by impaired function of torsinA, a protein linked to nuclear membrane budding. The relationship of NE budding to neural development and CNS function is unclear, however, obscuring its potential role in dystonia pathogenesis. We find NE budding begins and resolves during a discrete neurodevelopmental window in torsinA null neurons in vivo. The developmental resolution of NE budding corresponds to increased torsinB protein, while ablating torsinB from torsinA null neurons prevents budding resolution and causes lethal neural dysfunction. Developmental changes in torsinB also correlate with NE bud formation in differentiating DYT1 embryonic stem cells, and overexpression of torsinA or torsinB rescues NE bud formation in this system. These findings identify a torsinA neurodevelopmental window that is essential for normal CNS function, and have important implications for dystonia pathogenesis and therapeutics.
dyt1 dystonia torsina-ΔE的核包膜定位需要Sun1 linc复合物成分。
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