一个经发育调节的长距离增强剂-促进剂接触介导人类神经发育
bioRxiv : the preprint server for biology
|January 23, 2026
概括
一个远程增强剂通过长距离DNA循环调节神经干细胞 (NSC) 中的SOX2基因表达. 这种增强剂对于神经外皮发育和前脑规范至关重要.
科学领域:
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
- 干细胞生物学 干细胞生物学
背景情况:
- SOX2 是人类胚胎干细胞 (hESC) 中的一个关键多能性因子.
- 在分化过程中,SOX2表达在神经ectoderm中保持.
- 在开发过程中控制SOX2转录的机制尚未完全理解.
研究的目的:
- 研究人类发育过程中SOX2转录的调节机制.
- 确定和描述控制神经干细胞 (NSC) 中SOX2表达的调控元素.
- 了解长距离相互作用在SOX2基因调节中的作用.
主要方法:
- CRISPR-Cas9基因编辑以切除一个遥远的增强剂和一个CTCF动机.
- 在人类胚胎干细胞 (hESC) 和神经干细胞 (NSC) 中对SOX2转录的分析.
- 评估神经外皮分化和前脑特异性在瘤和大脑器官.
主要成果:
- 一个距离SOX2位点550kb的远方增强剂在NSC中被选择性地激活.
- 在NSC中增强剂删除会减少SOX2转录,并损害神经外皮分化和前脑发育.
- 增强剂附近的CTCF基因的破坏会影响染色质循环和SOX2转录,部分模仿增强剂删除表型.
结论:
- 一种经发育调节的长距离增强剂相互作用控制着在发育中的人类神经系统中的SOX2表达.
- 这种增强剂-基因通信对于神经外皮分化和前脑特异化至关重要.
- 通过CTCF介导的循环在促进这种远程监管互动方面发挥着作用.
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