独特的突触机制驱动NRXN1在iPSC衍生的自闭症和精神分裂症神经模型中的变异介导致病性
Jay English1,2, Danny McSweeney1,2, Jinghui Geng3,4
1Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst MA 01003.
bioRxiv : the preprint server for biology
|August 12, 2025
概括
在NRXN1基因中拷贝数删除会增加自闭症谱系障碍 (ASD) 和精神分裂症 (SCZ) 的风险. 这项研究揭示了与SCZ相比,具有NRXN1缺失的ASD患者的突触和网络变化,影响神经元可塑性并提供治疗见解.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学是一种遗传学.
- 发展生物学 发展生物学
背景情况:
- 在2p16.3/NRXN1位点的拷贝数删除与自闭症谱系障碍 (ASD) 和精神分裂症 (SCZ) 有关.
- 以前的研究表明NRXN1缺失会损害精神分裂症 (SCZ) 患者衍生的神经元中的突触功能.
- 在ASD中NRXN1缺失对突触功能的影响仍然在很大程度上未被描述.
研究的目的:
- 研究NRXN1删除对ASD个体突触功能和可塑性的特定影响.
- 为了比较ASD与SCZ中NRXN1删除的突触和网络层面的后果.
- 确定NRXN1删除是否导致疾病特异性突触表型.
主要方法:
- 利用以前未经表征的诱导多能干细胞 (iPSC) 线,来自具有NRXN1缺失的ASD患者.
- 在单个神经元和神经元网络水平上检查了突触传递和可塑性.
- 评估了基础自发突触传输,刺激/抑制信号平衡,神经元发射模式和突触缩放.
主要成果:
- 与ASD相关的NRXN1删除选择性地增强激发性突触信号,而不会影响抑制性突触,与SCZ相关的删除不同,它减少了两者.
- 在ASD-NRXN1删除载体中的神经网络表现出增强的传输概率和不规则的触发模式.
- ASD-NRXN1删除独特地损害了突触缩放,在神经元沉默期间无法调节突触强度.
结论:
- 与SCZ相比,NRXN1删除导致ASD中明显的突触和网络水平的改变.
- 这些发现突出了NRXN1删除对神经元功能和连接性的疾病特异性影响.
- 该研究提供了对NRXN1关联突触病的机制性见解,为治疗策略提供了信息.
相关概念视频
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders
957
Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within...
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within...
957
Biological Causes of Schizophrenia
149
Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin...
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin...
149


