Effect of astrocyte on synchronization of thermosensitive neuron–astrocyte minimum system  

作　　者：Yi-Xuan Shan Hui-Lan Yang Hong-Bin Wang Shuai Zhang Ying Li Gui-Zhi Xu 单仪萱;杨惠兰;王宏斌;张帅;李颖;徐桂芝(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China;Hebei Key Laboratory of Bioelectromagnetics and Neural Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China [2]Hebei Key Laboratory of Bioelectromagnetics and Neural Engineering,Hebei University of Technology,Tianjin 300130,China

出　　处：《Chinese Physics B》2022年第8期325-336,共12页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 51607056, 51737003, and 51877069);State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology (Grant No. EERI PI2020006)。

摘　　要：Astrocytes have a regulatory function on the central nervous system(CNS), especially in the temperature-sensitive hippocampal region. In order to explore the thermosensitive dynamic mechanism of astrocytes in the CNS, we establish a neuron-astrocyte minimum system to analyze the synchronization change characteristics based on the Hodgkin-Huxley model, in which a pyramidal cell and an interneuron are connected by an astrocyte. The temperature range is set as 0-40 ℃ to juggle between theoretical calculation and the reality of a brain environment. It is shown that the synchronization of thermosensitive neurons exhibits nonlinear behavior with changes in astrocyte parameters. At a temperature range of0 ℃-18 ℃, the effects of the astrocyte can provide a tremendous influence on neurons in synchronization. We find the existence of a value for inositol triphosphate(IP_(3)) production rate and feedback intensities of astrocytes to neurons, which can ensure the weak synchronization of two neurons. In addition, it is revealed that the regulation of astrocytes to pyramidal cells is more sensitive than that to interneurons. Finally, it is shown that the synchronization and phase transition of neurons depend on the change in Ca^(2+) concentration at the temperature of weak synchronization. The results in this paper provide some enlightenment on the mechanism of cognitive dysfunction and neurological disorders with astrocytes.

关 键 词：astrocytes SYNCHRONIZATION Hodgkin–Huxley model thermosensitive neuron 

分 类 号：Q421[生物学—神经生物学]