α7 尼古丁性乙胆受体调节人体皮层发育中的放射性质细胞命运
Tanzila Mukhtar1,2, Clara-Vita Siebert3,4,5, Yuejun Wang3,4
1Department of Neurology, University of California, San Francisco, CA, USA. Tanzila.mukhtar@ucsf.edu.
Nature communications
|July 2, 2025
概括
产前尼古丁暴露通过改变原生细胞中的尼古丁乙胆受体 (nAChRs) 影响胎儿大脑发育. 这会影响放射性质细胞 (RG) 增殖和神经元分化,并对神经发育障碍产生影响.
科学领域:
- 神经科学是一个神经科学.
- 发育生物学 发展生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 产前尼古丁暴露与胎儿大脑发育受损有关,特别是皮质灰质体积减少.
- 这些神经发育效应背后的精确细胞机制仍然不太清楚.
研究的目的:
- 阐明尼古丁乙胆受体 (nAChRs) 在原生细胞和放射性质细胞 (RG) 中在产前尼古丁暴露后的人类皮质发育过程中的作用.
- 调查涉及的特定nAChR子单位及其下游信号通路.
主要方法:
- 使用了从人类皮质组织中取出的有机型脑切片和分离的细胞培养.
- 进行单细胞RNA测序以分析尼古丁反应的基因表达变化.
- 研究了nAChR亚单元 (CHRNA7,CHRFAM7A) 在原生细胞和RG中的表达.
- 评估了nAChR激活和淘汰对RG增殖和神经元分化的影响.
- 检查了YAP1作为下游效应者的作用.
主要成果:
- 在SOX2+原生和神经元中鉴定了CHRNA7和人类特异性CHRFAM7A的表达,在RG末脚中丰富了CHRFAM7A.
- nAChR激活增加了RG增殖和降低了神经元分化,而nAChR淘汰则产生了相反的效果.
- 尼古丁暴露降低了刺激神经元中的关键基因的调节,CHRNA7 / CHRFAM7A选择性调节了这些变化.
- 确定了YAP1作为一个关键的下游效应因子,其抑制逆转了尼古丁诱导的ORG细胞的改变.
结论:
- 尼古丁酸乙胆受体在调节人类皮层原始细胞增殖和神经元分化方面发挥着至关重要的作用.
- CHRNA7和CHRFAM7A是尼古丁对神经发育影响的关键调解者.
- YAP1信号传递是尼古丁通过其神经发育病理生理学发挥的关键途径.
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