早期成熟和过度兴奋是皮层神经元的共同表型,来自不同的ASD相关突变
Yara Hussein1, Utkarsh Tripathi1, Ashwani Choudhary1
1Sagol Department of Neurobiology, Faculty of Natural Sciences, University of Haifa, Haifa, Israel.
Translational psychiatry
|July 6, 2023
概括
自闭症谱系障碍 (ASD) 神经元表现出早期成熟和过度刺激. 这些来自诱导多能干细胞 (iPSC) 的皮层神经元的发现表明ASD中存在一个共同的细胞表型.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
背景情况:
- 自闭症谱系障碍 (ASD) 带来了社会,感官运动和行为方面的挑战.
- 遗传因素,包括GRIN2B和SHANK3等基因的突变,与ASD和相关疾病如和智力障碍 (ID) 密切相关.
研究的目的:
- 通过检查从诱导多能干细胞 (iPSCs) 衍生的皮质神经元来研究ASD中的细胞表型.
- 为了比较来自患有特定ASD相关突变的患者的iPSC衍生的皮质神经元中的神经元功能,与未受影响亲属的控制神经元进行比较.
主要方法:
- 从患有GRIN2B,SHANK3,UBTF突变或7q11.23重复的患者的iPSC中生成皮质神经元.
- 全细胞补丁电生理学测量神经元刺激性和突触活动.
- 在早期发育阶段 (3-5周) 突变和对照线之间的神经元特性比较.
主要成果:
- 与对照神经元相比,突变皮层神经元表现出显著的过度兴奋性.
- 在ASD衍生的神经元中观察到早期的神经元成熟.
- 关键的电生理学变化包括增加的电流,增强的刺激后突触电流 (EPSCs) 幅度和速率,以及更多的唤起动作潜能.
结论:
- 早期成熟和过度兴奋性代表了ASD皮层神经元中潜在的融合表型.
- 在不同的基因突变中观察到的这些细胞变化突出了ASD病理生理学的共同途径.
- 从iPSC衍生的神经元为研究细胞和遗传层面的ASD提供了有价值的模型.
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