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Mef2c通过调节对以林排斥的敏感性来控制产后状轴向向

Sriram Sudarsanam¹, Luis E Guzman-Clavel¹, Nyle Dar¹

¹Solomon H. Snyder Department of Neuroscience, The Johns Hopkins Kavli Neuroscience Discovery Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.

The Journal of neuroscience : the official journal of the Society for Neuroscience

|April 14, 2025

概括

转录因子Mef2c调节发育中的小鼠大脑中的神经元身份. 它还通过抑制EphA6信号来指导产后状神经元中的特定轴突投射.

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
遗传学是一个遗传学.

背景情况:

大脑皮层的神经连接对于信息处理至关重要.
神经元类及其轴突突出的精确发展对于皮层电路的形成至关重要.
控制皮质内轴突向的遗传因素在很大程度上是未知的.

研究的目的:

研究转录因子肌细胞增强因子2-c (Mef2c) 在皮层发育中的作用.
为了确定皮质内轴突向的遗传决定因素.
阐明Mef2c在神经元发育的胚胎和产后阶段的功能.

主要方法:

利用小鼠模型研究 Mef2c 在胚胎形成和产后发育过程中的功能.
检查了Mef2c在体感皮质 (S1) 层中确定神经元身份中的作用.
在 Mef2c 突变性呼体投影神经元 (CPN) 中使用了 EphrinA-EphA 信号的功能操纵.

主要成果:

Mef2c在胚胎发生过程中指导S1层4和5金字塔神经元身份的发展.
产后的Mef2c表达转移到CPNs的2/3层,在那里它调节了轴突向.
Mef2c抑制了EphA6的表达,使S1-L2/3 CPN轴突对以弗林A5介导的排斥变得不敏感.

结论:

Mef2c在皮层发育中起着双重作用.
它调节胚胎神经元中的层状亚型规范.
它控制着产后呼突投射轴突的对侧同位素向.

关键词:

这就是Mef2cc.轴突指导指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导轴突指导导轴突指导导轴突指导轴指导轴指导轴指导轴指导身体的质体 (callosum) 是一个体.埃弗林斯 (Ephrins) 是一种药物.皮质内连接性皮质内连接性新皮质新皮质的新皮质

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