在小鼠中,CHD8脱素缺陷导致自闭症类型的表型
Yuta Katayama1, Masaaki Nishiyama1, Hirotaka Shoji2
1Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan.
Nature
|September 8, 2016
概括
神经发育中的关键参与者CHD8基因的突变与自闭症谱系障碍 (ASD) 有关. 这项研究表明,小鼠中CHD8脱素不足会导致类似自闭症的行为和神经发育迟缓.
科学领域:
- 神经科学
- 遗传学
- 发育生物学
背景情况:
- 自闭症谱系障碍 (ASD) 是一种具有高度遗传性的神经发育状况.
- 像CHD8这样的基因的新突变经常在自闭症患者中发现.
- CHD8突变在自闭症发病过程中的确切作用尚不清楚.
研究的目的:
- 在小鼠模型中研究CHD8突变的功能后果.
- 确定CHD8脱素不足如何导致类似自闭症的特征.
- 探索CHD8相关的神经发育变化的分子机制.
主要方法:
- 对Chd8突变异构的小鼠的生成和行为分析.
- 全球基因表达在突变小鼠的大脑中的表现.
- 基因组丰富分析以确定受影响的生物途径.
- 研究CHD8和REST (RE-1沉默转录因子) 之间的相互作用.
主要成果:
- Chd8异合体小鼠表现出类似自闭症的行为,包括焦虑,重复行为和社交互动缺陷.
- 导致脑部微妙的全球基因表达变化, 反映了人类自闭症大脑的模式.
- 在突变小鼠胚胎中观察到神经发育延迟.
- 减少CHD8表达与神经元抑制基因REST的异常激活相关,这种效应也在人类自闭症大脑中观察到.
结论:
- 由于CHD8脱素不足是自闭症的重要危险因素,强烈地表明了因果关系.
- 这项研究表明,神经发育延迟,可能由REST调节失调促成,是CHD8相关自闭症的关键机制.
- 这些发现突显了CHD8在正常神经发育中的关键作用及其对自闭症病因的影响.
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