大规模的外体测序研究涉及自闭症神经生物学的发育和功能变化
F Kyle Satterstrom1, Jack A Kosmicki2, Jiebiao Wang3
1Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA; Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA.
Cell
|January 26, 2020
概括
这项研究使用外基因测序确定了102个自闭症谱系障碍 (ASD) 风险基因. 这些基因对早期大脑发育至关重要, 影响基因表达和神经元通信,
科学领域:
- 遗传学
- 神经科学
- 发育生物学
背景情况:
- 自闭症谱系障碍 (ASD) 是一种复杂的神经发育状况,具有重要的遗传成分.
- 之前的遗传研究已经确定了许多候选基因,但对遗传结构的全面理解仍然不完整.
研究的目的:
- 通过迄今为止最大的外基因测序研究,确定自闭症谱系障碍 (ASD) 的新遗传风险因素.
- 研究已识别的自闭症风险基因的功能作用和发育时间.
主要方法:
- 35,584个样本的外体序列测定,其中包括11,986个患有自闭症的人.
- 使用增强的分析框架整合de novo和病例对照罕见变异分析.
- 自闭症和严重神经发育迟缓群体之间的变异频率和表型差异的比较.
主要成果:
- 在≤0.1的错误发现率下识别了102个高度可靠的自闭症风险基因.
- 在严重神经发育迟缓中,有49个基因表现出破坏性de novo变异的丰富,而在自闭症中,有53个基因表现出丰富.
- 风险基因主要参与早期的大脑发育,调节基因表达和神经元通信,其中13个与副本数变异位点重叠.
结论:
- 这项研究显著扩大了已知自闭症风险基因的范围.
- 鉴定出的基因突出显示了关键的神经发育路径,包括基因调节和神经元信号传递,可能导致大脑中的激发性-抑制性失衡.
- 这些发现为了解自闭症的不同遗传病因和制定有针对性的干预措施提供了基础.
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