由于在小鼠皮质发育过程中Chd8哈普洛因不足导致的基因表达的细胞类型特异性失调
Kristina M Yim1, Marybeth Baumgartner1, Martina Krenzer1
1Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA.
Cell genomics
|September 18, 2025
概括
染色体螺旋酶 (CHD8) 基因变异增加了自闭症谱系障碍 (ASD) 的风险. 由于CHD8的哈普隆缺陷会影响神经发育基因表达,影响原生和成熟的神经元.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
背景情况:
- 染色体螺旋酶CHD8基因中的破坏性变异与自闭症谱系障碍 (ASD) 的风险增加有关.
- 通过改变神经发育基因表达,CHD8脱素不足是一种被提议的机制,有助于ASD.
- 对于CHD8脱不全的细胞类型特异性转录后果的理解有限.
研究的目的:
- 为了研究由CHD8哈普洛缺陷引起的细胞类型特异性转录失调,在发育中的小鼠皮质.
- 确定不同神经元原生和成熟细胞类型中受CHD8功能减弱影响的特定基因和通路.
- 为了比较胚胎和青少年阶段以及跨物种的基因表达模式.
主要方法:
- 在胚胎和青少年Chd8+/-小鼠皮质样本上利用单细胞和单核RNA测序 (scRNA-seq和snRNA-seq).
- 分析基因表达模式,以确定特定细胞群中的失调基因.
- 研究了CHD8和其他ASD风险基因在发育中的皮质组织中的表达轨迹.
主要成果:
- 在Chd8+/-胚胎放射性质细胞中确定了失调的基因,包括那些涉及神经发育障碍,染色质重塑和神经元投射发育的基因.
- 在Chd8+/-产后刺激性皮质神经元中发现了与突触活动和组织相关的基因失调,这表明突触生成受损.
- 在小鼠和人类发育皮层中观察到CHD8和其他ASD风险基因的保守表达轨迹.
结论:
- 由于CHD8的哈普洛缺陷导致复杂的转录失调,可能对神经前代和刺激系内的成熟神经元产生不同的影响.
- 研究结果表明,受损的染色质重塑和突触功能有助于与ASD中CHD8突变相关的神经发育变化.
- 该研究提供了细胞类型特定的洞察力,了解与CHD8变体相关的ASD风险背后的分子机制.
关键词:
在ASD中,使用的是ASD.在CHD8中,自闭症谱系障碍 自闭症谱系障碍皮层发育,皮层的发展.基因调节 基因调节 基因调节鼠标模型 鼠标模型鼠标模型神经发育的神经发育神经发育障碍 神经发育障碍单细胞转录组学 单细胞转录组学更多相关视频
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