轴突-轴突突突触输入通过结构和功能调整轴突初始段来驱动恒常性可塑性
Rui Zhao1, Baihui Ren2, Yujie Xiao3
1Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Neurobiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
Science advances
|August 2, 2024
概括
主要神经元的轴突初始段 (AIS) 中的恒常性可塑性由吊灯细胞输入调整,影响神经元刺激性和社会行为.
科学领域:
- 神经科学是一个神经科学.
- 细胞神经科学 细胞神经科学
- 系统神经科学 系统神经科学
背景情况:
- 恒常性可塑性通过调整神经元发射特性来稳定大脑网络.
- 轴突初始段 (AIS) 是调节神经元刺激性的关键部位.
- 直接突触输入到AIS在这种可塑性中的作用仍然不清楚.
研究的目的:
- 为了调查AIS的突触输入是否驱动恒常性可塑性.
- 为了确定不同GABAergic输入对AIS调的具体贡献.
- 将AIS可塑性与神经元刺激性和动物行为联系起来.
主要方法:
- 研究了前临床 (PL) 区域内主要神经元 (PNs) 的恒常性可塑性.
- 研究了从吊灯细胞 (ChCs) 和帕瓦尔胺阳性篮细胞的GABAergic突触输入对AIS的影响.
- 评估了AIS形态的变化,通道表达和PN刺激性.
- 监测与PL PN活动和AIS可塑性相关的社会行为.
主要成果:
- 来自CHC的GABAergic突触输入,但不是篮细胞,驱动PN中AIS的恒常调整.
- 这种调整会影响AIS形态,通道表达和PN刺激性.
- 改变的AIS可塑性和PN兴奋性与社会行为的时间依赖性变化相关.
结论:
- 通过ChC输入调节的AIS的恒温可塑性在维持神经元功能方面发挥着至关重要的作用.
- 在PNS中的AIS可塑性可以在细胞和行为层面补偿不平衡的CHC输入.
- 这种机制可能对抵消与网络不稳定性相关的神经系统缺陷至关重要.
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