电突触对海马体CA1区的尖波涟漪的动力学补偿机制研究
作者:
基金项目:

国家自然科学基金资助项目(12072046)


Dynamic Compensation Mechanism of Gap Junctions in CA1 Region of Hippocampus to Sharp Wave-Ripples
  • 摘要
  • | |
  • 访问统计
  • | |
  • 相似文献 [20]
  • | | |
  • 文章评论
    摘要:

    电突触在成人大脑中的占比较少,故有关电突触对神经元网络复杂时空放电动力学特性影响的研究相对较少.近年来,越来越多的研究指出,电突触在神经元之间的信息传递、神经环路发育以及神经系统工作机制的理解等方面均发挥着重要作用.CA1区域的尖波涟漪(sharp wave-ripples, SWR)同步振荡是海马体实现记忆巩固和重放的重要动力学放电特征.当仅包含化学突触的CA1神经元网络中无法出现SWR时,不同神经元之间的电突触是否能诱发SWR进而提供相应的补偿,目前尚不清楚.为此,我们构建了一个包含三类神经元[兴奋性锥体神经元(pyramidal cell, PC)、小清蛋白阳性篮细胞(parvalbumin-positive basket cell)、轴突-轴突细胞(axo-axonic cell)]的海马体CA1区的神经元网络.研究结果指出,当CA1神经元网络内的化学突触减弱而无法产生SWR同步放电时,PC中的电突触、PV+BC中的电突触对SWR均有促进作用;且PC中的电突触以及两类神经元中都存在电突触时,对SWR的补偿最有效.

    Abstract:

    Gap junctions play an important role in the transmission of information between neurons, the development of neural circuits, and the understanding of the working mechanism of the nervous system. The direct coupling between neurons connected by gap junctions may contribute to the synchronization of neuronal firing and the emergence of sharp wave-ripples(SWR), which affect brain functions such as memory consolidation. Because gap junctions are so few in the mature brain, they have been ignored in earlier studies. Considering the heterogeneous characteristics of excitatory and inhibitory neurons, it is unclear whether gap junctions in different neuronal types can provide a corresponding compensatory mechanism for SWR in abnormal networks. In order to explore the above problems, a network of neurons in CA1 region of hippocampus with introduction of gap junctions was constructed, which consisted pyramidal cells, parvalbumin-positive basket cells, and axon-axonic cells. The results show that when the chemical synapses in CA1 are weakened and cannot generate SWR synchronous discharge, gap junctions in pyramidal cells and parvalbumin-positive basket cells can promote SWR. The SWR compensation was most effective when gap junctions in pyramidal neurons and in both types of neurons were present.

    参考文献
    引证文献
引用本文

杨欣媛,孙晓娟.电突触对海马体CA1区的尖波涟漪的动力学补偿机制研究[J].动力学与控制学报,2025,23(2):72~82; Yang Xinyuan, Sun Xiaojuan. Dynamic Compensation Mechanism of Gap Junctions in CA1 Region of Hippocampus to Sharp Wave-Ripples[J]. Journal of Dynamics and Control,2025,23(2):72-82.

复制
分享
文章指标
  • 点击次数:95
  • 下载次数: 56
  • HTML阅读次数: 0
  • 引用次数: 0
历史
  • 收稿日期:2024-04-15
  • 最后修改日期:2024-06-07
  • 在线发布日期: 2025-03-13
文章二维码

微信公众号二维码

手机版网站二维码