中国物理B ›› 2023, Vol. 32 ›› Issue (2): 20502-020502.doi: 10.1088/1674-1056/ac6dbc

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Epilepsy dynamics of an astrocyte-neuron model with ammonia intoxication

Zhixuan Yuan(袁治轩)1, Mengmeng Du(独盟盟)2, Yangyang Yu(于羊羊)1, and Ying Wu(吴莹)1,†   

  1. 1 State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Laboratory for Vibration Control of Aerospace Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    2 School of Mathematics and Data Science, Shaanxi University of Science and Technology, Xi'an 710000, China
  • 收稿日期:2022-02-05 修回日期:2022-04-10 接受日期:2022-05-07 出版日期:2023-01-10 发布日期:2023-01-18
  • 通讯作者: Ying Wu E-mail:wying36@xjtu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12132012 and 11972275) and the National Science Foundation for Young Scientists of China (Grant No. 12102240).

Epilepsy dynamics of an astrocyte-neuron model with ammonia intoxication

Zhixuan Yuan(袁治轩)1, Mengmeng Du(独盟盟)2, Yangyang Yu(于羊羊)1, and Ying Wu(吴莹)1,†   

  1. 1 State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Laboratory for Vibration Control of Aerospace Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    2 School of Mathematics and Data Science, Shaanxi University of Science and Technology, Xi'an 710000, China
  • Received:2022-02-05 Revised:2022-04-10 Accepted:2022-05-07 Online:2023-01-10 Published:2023-01-18
  • Contact: Ying Wu E-mail:wying36@xjtu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12132012 and 11972275) and the National Science Foundation for Young Scientists of China (Grant No. 12102240).

摘要: Experimental records in the cerebral cortex indicate that ammonia injection can lead to seizures. Considering that astrocytes play a vital role in mediating the uptake and absorption of ammonium ions in the extracellular space of the cortical circuit, we constructed a new astrocyte neuron coupling model, which is composed of a neuron and its astrocytes connected through the extracellular space, taking into account of the influence of extracellular ammonium ions. The numerical results verified the previous experimental observation that obtained epileptic firing modes of neurons and postsynaptic GABA reversal potential depolarization triggered by ammonia injection. In addition, we also determined the concentration-response relationship between the ammonium ion concentration and the time of entering epilepsy and predicted the threshold of the ammonium ion concentration for the onset of epilepsy.

关键词: ammonia, neuron, astrocyte, epilepsy

Abstract: Experimental records in the cerebral cortex indicate that ammonia injection can lead to seizures. Considering that astrocytes play a vital role in mediating the uptake and absorption of ammonium ions in the extracellular space of the cortical circuit, we constructed a new astrocyte neuron coupling model, which is composed of a neuron and its astrocytes connected through the extracellular space, taking into account of the influence of extracellular ammonium ions. The numerical results verified the previous experimental observation that obtained epileptic firing modes of neurons and postsynaptic GABA reversal potential depolarization triggered by ammonia injection. In addition, we also determined the concentration-response relationship between the ammonium ion concentration and the time of entering epilepsy and predicted the threshold of the ammonium ion concentration for the onset of epilepsy.

Key words: ammonia, neuron, astrocyte, epilepsy

中图分类号:  (Nonlinear dynamics and chaos)

  • 05.45.-a
64.70.qj (Dynamics and criticality) 87.19.L- (Neuroscience) 87.19.lk (Glia)