成熟的内部神经元子类型来自尾部质突出体内不同的空间和时间子域
Vedant Garg1,2, Samra Beyene1,2, Anthony Tanzillo1,2
1Unit on Cellular and Molecular Neurodevelopment.
bioRxiv : the preprint server for biology
|September 19, 2025
概括
尾状质突出 (CGE) 呈现空间偏差,特定的内部神经元亚型来自不同的CGE亚域. 这些空间起源,而不是出生时间,主要影响内部神经元的发育.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 前脑抑制性内部神经元对于神经回路的功能至关重要.
- 这些内部神经元起源于胚胎发生过程中的中部和尾部状突出 (MGE和CGE).
- 虽然MGE衍生的内部神经元起源的特征很好,但CGE衍生的内部神经元组织在很大程度上仍未被探索,特别是考虑到它们在灵长类动物中的比例增加.
研究的目的:
- 为了研究空间时空起源和尾部质突起 (CGE) 内的内部神经元亚型规范之间的关系.
- 为了确定不同的CGE子域是否会产生特定的内部神经元群.
- 评估发育时间与空间起源对CGE衍生的内部神经元命运的影响.
主要方法:
- 在胚胎阶段 (E13.5和E15.5) 从特定的CGE子域采集光标记的细胞.
- 将这些标记的细胞移植到野生类型新生儿小鼠的皮质中.
- 移植后一个月,对移植细胞进行免疫组织化学分析,以确定成熟的内部神经元亚型及其起源.
主要成果:
- 在CGE中发现了显著的空间偏差,不同的内部神经元亚型优先来自特定的CGE子域.
- 这些空间偏差被发现随着时间的推移相对稳定.
- 结果表明,时间出生日期与从CGE获得的最终内部神经元亚型之间存在很小的相关性.
结论:
- 尾状质突出 (CGE) 显示了内部神经元生成的空间组织的发展计划.
- 内神经元亚型的规范主要取决于它们在CGE中的空间起源,而不是它们的出生时间.
- 未来的研究将这些发现与空间转录学结合起来,将阐明控制CGE衍生内部神经元发育的基因调控机制.
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