替代分离依赖REST调节的缺陷导致聋
Yoko Nakano1, Michael C Kelly2, Atteeq U Rehman3
1Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA; Inflammation Program, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA.
Cell
|July 3, 2018
概括
通过调节毛细胞中的神经元基因表达, REST 基因的替代拼接对于听力至关重要. 这种拼接缺陷会导致老鼠和人类的聋,但HDAC抑制剂可能提供一种潜在的治疗方法.
科学领域:
- 遗传学
- 神经科学
- 耳鼻喉科
背景情况:
- 在非神经细胞中,DNA结合蛋白REST (RE1沉默转录因子) 通过基因脱乙酶 (HDAC) 复合体抑制神经元基因.
- 在分化神经元中,REST的下调通常通过转录性沉默发生.
研究的目的:
- 通过听觉中的替代拼接来研究REST的转录后调节作用.
- 确定用于听觉功能的机械感应毛细胞的REST替代拼接的必要性.
主要方法:
- 在小鼠耳毛细胞中对RestmRNA的替代拼接的分析.
- 在Rest基因中产生和表征异构缺失特定替代元的小鼠.
- 对突变小鼠的听力功能和毛细胞退化进行评估.
- 对HDAC抑制剂SAHA (Vorinostat) 的治疗效果进行评估.
- 研究与遗传性聋相关的人类REST变异.
主要成果:
- 在休息mRNA中引起框架转移的异构体的调节替代拼接对于小鼠毛细胞中的神经元基因脱压至关重要.
- 在小鼠中,这种替代性前体的异构缺失导致毛细胞退化和聋.
- 用SAHA (Vorinostat) 治疗可恢复Rest拼接缺陷的小鼠的听力.
- 一种新型的人类REST变异抑制这种移拼接事件与主导性遗传性聋有关.
结论:
- 对毛细胞的功能和维持听力至关重要.
- 这种拼接机制的缺陷会导致老鼠和人类遗传性聋.
- 对于某些类型的遗传性聋,HDAC抑制剂是一种潜在的治疗策略.
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