PAK3的激活促进皮层内部神经元的触线和辐射迁移交换机,通过增加领导过程动态和破坏细胞极性来促进皮层内部神经元的触线和辐射迁移交换机
Lucie Viou1, Melody Atkins1, Véronique Rousseau2
1INSERM UMR-S 1270; Institut du Fer à Moulin, Sorbonne Université, F-75005, Paris, France.
Molecular psychiatry
|March 7, 2024
概括
在发育中的大脑中,PAK3激酶活性对于指导GABAergic内部神经元迁移至关重要. 损坏的PAK3激酶功能破坏了这一过程,这可能解释了人类相关疾病中出现的认知缺陷.
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
- 分子生物学分子生物学
背景情况:
- 在p21激活激酶3 (PAK3) 中的突变与人类的认知缺陷和大脑异常有关.
- 在它们在发育中的皮质内迁移期间,PAK3在GABAergic内部神经元中表达.
- 对于形成功能性皮质电路来说,GABAergic 内神经元的适当迁移是必不可少的.
研究的目的:
- 调查PAK3激酶活性在调节皮质GABAergic内部神经元迁移中的作用.
- 了解PAK3如何影响内部神经元导航和在皮质板内的定居.
主要方法:
- 在胚胎皮层内部神经元中利用了构成性活性 (PAK3-ca) 和激酶死亡 (PAK3-kd) 的PAK3变体.
- 观察到内部神经元迁移模式,导致过程延伸和细胞极性.
- 使用药理上抑制PAK3激酶活性.
主要成果:
- 活跃的PAK3 (PAK3-ca) 缩短了领先过程,使极性不稳定,触点迁移受损,导致深层皮质层中的积累.
- 抑制PAK3激酶破坏了辐射迁移到皮质板的过程.
- 不活跃的PAK3 (PAK3-kd) 促进了分支过程和持续的接触式迁移.
结论:
- 通过控制主要过程动态和细胞极性,PAK3激酶活性对于调节内部神经元迁移至关重要.
- PAK3促进从触线迁移到辐射迁移的切换,促进正确的皮质准.
- 患者的PAK3激酶活性受损可能导致异常的GABAergic内部神经元定位,并导致神经系统疾病.
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