与言语/认知延迟和发作相关的致病变体会影响在发育人类皮质中的刺激神经元和微质中表达偏差的基因
Jeffrey B Russ1, Alexa C Stone2, Kayli Maney2
1Department of Pediatrics, Division of Neurology, Duke University, USA.
bioRxiv : the preprint server for biology
|July 15, 2024
概括
导致神经发育障碍的遗传变异在人类大脑中表现出细胞特异性的表达偏差. 与言语/认知延迟和发作相关的致病变体会影响刺激神经元和微质,为病理生理学提供了洞察力.
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:
- 神经发育障碍 (NDD) 是常见的小儿神经疾病,导致慢性残疾.
- 单基因病原体变体占NDD的三分之一,但细胞病理生理学仍然不明朗.
- 基因测试的进步不断发现新的NDD病因.
研究的目的:
- 研究与不同神经发育现象型相关的人类皮质中细胞特异性基因表达偏差.
- 整合来自NDD患者的表型数据与单核RNA测序 (snRNAseq) 数据.
- 了解由单基变异引起的神经发育障碍的细胞基础.
主要方法:
- 分析了84名新生儿和4,238名患有病原性单基因变异的NDD患者的表型数据.
- 基因组按神经发育表型 (例如,言语/认知延迟,发作) 进行分组.
- 通过使用 snRNAseq 数据从 86 个人类皮质样本 (第二个三个月到成年期) 来比较皮质细胞亚型的基因组表达.
主要成果:
- 发言/认知延迟和的致病变体涉及在皮层刺激神经元中高度表达的基因.
- 与这些表型相关的明显变体显示了微质中的表达偏差.
- 基因表达模式的微妙差异区分出与有或没有发作的言语/认知延迟相关的变异,涉及调节和突触机制.
结论:
- 结合表型和snRNAseq数据,确定了NDD中涉及的基因的细胞特异性表达偏差.
- 刺激神经元和微质中的丰富表达突出了它们在大脑发育和NDD病理生理学中的关键作用.
- 这项研究提供了对受致病变体影响的特定皮质细胞类型和介导NDD症状的见解.
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