对安吉尔曼综合征的Cas9基因疗法捕获Ube3a-ATS长非编码RNA
Justin M Wolter1,2,3, Hanqian Mao1,2,3, Giulia Fragola1
1UNC Neuroscience Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Nature
|October 22, 2020
概括
使用Cas9的基因治疗成功地在Angelman综合征 (AS) 鼠标模型中重新激活了父亲的UBE3A基因. 这种早期干预恢复了基因功能,改善了与AS相关的症状,
科学领域:
- 遗传学
- 神经科学
- 基因治疗
背景情况:
- 安吉尔曼综合征 (AS) 是一种严重的神经发育障碍.
- 它是由于母亲遗传的UBE3A基因拷贝的丢失造成的.
- 在神经元中,父亲的UBE3A副本被UBE3A-ATS沉默.
研究的目的:
- 调查Cas9是否可以在神经元中重新激活被静止的父性UBE3A等位基因.
- 开发一种针对安吉尔曼综合征的基因治疗方法.
主要方法:
- 在培养的神经元中,Cas9针对UBE3A-ATS中的Snord115基因.
- 一种携带Cas9和指导RNA的腺相关病毒 (AAV) 输送给AS小鼠模型.
- 在胚胎和出生后早期进行治疗.
主要成果:
- 用Cas9准Snord115基因在老鼠和人类神经元中重新激活了父性Ube3a.
- 在AS小鼠中早期的AAV介导基因治疗导致了长期的父性Ube3a在大脑中的重新激活.
- 这种治疗在AS小鼠模型中拯救了解剖学和行为缺陷.
结论:
- 针对AAV载体的基因组集成可以长期恢复父亲的UBE3A功能.
- 这种方法为安吉尔曼综合征提供了一个有前途的疾病修饰策略.
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