原生子极化调节神经皮层发育中的神经元亚型的顺序生成
Ilaria Vitali1, Sabine Fièvre1, Ludovic Telley1
1Department of Basic Neurosciences, University of Geneva, 1 Rue Michel Servet, 1211 Geneva, Switzerland.
Cell
|July 31, 2018
概括
发育中的脑细胞被称为"原生细胞", 随着新型神经元的产生, 这种生物电变化会影响基因表达和神经元发育,影响新皮层的多样性.
科学领域:
- 神经科学
- 发育生物学
- 细胞生物学
背景情况:
- 新皮质神经元的多样性来自于皮质形成过程中的顺序前代分裂.
- 活动依赖的过程调节神经元分化和电路组合.
- 生物电性质在不可激发的原生细胞中的作用在很大程度上尚未被探索.
研究的目的:
- 在小鼠新皮层发育过程中研究生物电过程对心室区域原始体的影响.
- 确定原生膜潜力的变化如何影响细胞命运和神经元输出.
主要方法:
- 在发育中的小鼠新皮层中对原生膜潜力的实验操纵 (超极化).
- 对祖先转录程序和分裂模式的分析.
- 评估神经元后代的层状,分子,形态和电路特征.
主要成果:
- 在连续的神经元亚型生成过程中,心室区域的原始体呈现出渐进的超极化.
- 实验超极化促使后代转向后期的发育计划.
- 这包括通过Wnt-β-catenin通路的抑制促成的早期中间原生细胞生成和先进的神经元分化.
结论:
- 祖先的生物电膜特性是发展程序中的时间进展的关键调节者.
- 超极化会影响原生转录状态和分裂模式,影响新皮层神经元的多样性.
- 这项研究揭示了一种将生物电与控制皮质生成和细胞命运的分子通路的新机制.
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