人类大脑中自闭症相关染色体15q11.2-13.1重复的细胞类型特异性影响
Caroline Dias1,2,3,4, Alisa Mo5, Chunhui Cai6
1Current Address: Department of Pediatrics, Section of Developmental Pediatrics, Section of Genetics and Metabolism, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus, Aurora, CO 80045.
bioRxiv : the preprint server for biology
|June 3, 2024
概括
15q11.2-13.1 (dup15q) 的重复显著改变了人类大脑中的基因表达和染色质可访问性,在细胞类型上产生不同的影响. 这提供了对神经发育障碍的见解,例如自闭症谱系障碍 (ASD).
科学领域:
- 神经遗传学 神经遗传学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 发育神经科学的发展神经科学.
背景情况:
- 重复复制数变异 (CNVs) 是神经发育障碍的关键遗传驱动因素.
- 15q11.2-13.1 (dup15q) 的重复是自闭症谱系障碍 (ASD) 的已知危险因素.
- 对于dup15q对人类大脑中的基因表达和染色质可访问性的细胞类型特异性影响尚不清楚.
研究的目的:
- 研究dup15q在人类前皮层中细胞类型特定的转录和表观遗传后果.
- 为了确定dup15q如何影响不同类型的大脑细胞的基因表达和染色质可访问性.
- 为了比较dup15q与非dup15qASD的分子特征.
主要方法:
- 单核RNA测序和多原子测序对具有dup15q,非dup15qASD和神经类型对照的人进行了测序.
- 进行了细胞类型特定的差异性基因表达分析.
- 进行了染色质可访问性和转录性调节动机的分析.
主要成果:
- 基因表达的变化在不同细胞类型之间有显著的差异,神经元亚型在重复区域显示出更大的上调调节.
- 基因在基线表达高的基因在dup15q.中显示了适度的变化.
- dup15q和ASD表现出不同的染色质可访问性概况,但共享转录性调节动机.
- 这涉及到不同的生物机制:ASD中的JUN/FOS网络和dup15q微质中的炎症网络.
结论:
- dup15q对人类大脑中的基因表达和染色质可访问性产生细胞类型特定的影响.
- 在dup15q综合征和ASD中涉及不同的分子通路.
- 结果为dup15q综合征的治疗发展提供了洞察力,并更广泛地了解神经发育障碍中的CNV.
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