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来自NeuroD1表达神经细胞的神经元通过过渡放大中间体过渡,但缺乏功能成熟度

Fangbing Chen¹, Xi Liu², Xiaowen Zhong³

¹Institute of Pediatrics, Children's Hospital of Fudan University, Shanghai 201102, China.

Science advances

|July 25, 2025

概括

在受伤后,NeuroD1可以将质细胞转化为大脑中的神经元,但仅在特定的时间窗口内,新的神经元缺乏成熟的电特性,限制了功能整合.

科学领域:

神经科学是一个神经科学.
干细胞生物学干细胞生物学
再生医学是一种再生医学.

背景情况:

在体内将非神经元细胞转化为神经元是治疗中枢神经系统 (CNS) 损伤或疾病的有希望的策略.
使用病毒载体介导的NeuroD1进行质到神经元的转基因差异化是一个有争议的方法.

研究的目的:

在体内研究天体细胞转化为神经元的时空动力学和机制基础.
评估NeuroD1产生的神经元的功能性质.

主要方法:

开发可诱导,可追溯血统的转基因小鼠.
时间空间谱系绘制.
单细胞转录组学. 单细胞转录组学.
评估神经电特性.

主要成果:

星细胞转化为神经元发生在受伤的脊髓和大脑的病变核心的特定时间窗口内.
在早期的损伤阶段,NeuroD1通过过渡放大OLIG2+原始体诱导转化,而不是在晚期或非反应性天体细胞.
由NeuroD1产生的神经元类细胞表现出不成熟的神经电特性,阻碍功能整合.
功能丧失的NeuroD1突变体和SOX2并没有诱导天体细胞转化为神经元.

结论:

由NeuroD1驱动的质细胞转化为神经元是局限于时空的,并且在机制上涉及过渡放大中间体.
转换的神经元的功能不成熟对神经电路集成和治疗应用构成重大限制.

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