中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (12): 2544-2552.doi: 10.12307/2025.379

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

重复经颅磁刺激对阿尔茨海默病小鼠海马齿状回钾离子通道的影响

钱  磊1,2,3,于洪丽1,2,3,赵秀芝1,2,3,朱俞灿1,2,3   

  1. 河北工业大学,1生命科学与健康工程学院,2天津市生物电工与智能健康重点实验室,3省部共建电工装备可靠性与智能化国家重点实验室,天津市  300130


  • 收稿日期:2024-04-08 接受日期:2024-05-29 出版日期:2025-04-28 发布日期:2024-09-10
  • 通讯作者: 于洪丽,博士,教授,博士生导师,河北工业大学,生命科学与健康工程学院,天津市生物电工与智能健康重点实验室,省部共建电工装备可靠性与智能化国家重点实验室,天津市 300130
  • 作者简介:钱磊,男,山东省潍坊市人,汉族,硕士,主要从事生物电磁技术研究。
  • 基金资助:
    国家自然科学基金项目(51877068),项目负责人:于洪丽

Effect of transcranial magnetic stimulation on potassium channels in the dentate gyrus of the hippocampus of Alzheimer’s disease mice

Qian Lei1, 2, 3, Yu Hongli1, 2, 3, Zhao Xiuzhi1, 2, 3, Zhu Yucan1, 2, 3   

  1. 1College of Health Sciences and Biomedical Engineering, 2Tianjin Key Laboratory of Bioelectromagnetic Technology and Intelligent Health, 3State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
  • Received:2024-04-08 Accepted:2024-05-29 Online:2025-04-28 Published:2024-09-10
  • Contact: Yu Hongli, PhD, Professor, Doctoral supervisor, College of Health Sciences and Biomedical Engineering, Tianjin Key Laboratory of Bioelectromagnetic Technology and Intelligent Health, State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
  • About author:Qian Lei, Master, College of Health Sciences and Biomedical Engineering, Tianjin Key Laboratory of Bioelectromagnetic Technology and Intelligent Health, State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
  • Supported by:
    the National Natural Science Foundation of China, No. 51877068 (to YHL)

摘要:


文题释义:
神经兴奋性:是指神经元在受到适当的刺激或信号时产生的电活动或化学反应的性质。当神经元受到兴奋性刺激时,通常会发生一系列电活动和化学反应,这些反应导致神经元内部电压发生变化,从而产生神经冲动或动作电位。
学习记忆:是指个体通过接受信息、经历经验并将其储存在大脑中供以后使用的过程,这一过程涉及到信息的获取、存储、加工和检索。

背景:经颅磁刺激已经被用于治疗阿尔茨海默病,但其机制尚未完全明确。
目的:分析重复经颅磁刺激对阿尔茨海默病小鼠海马齿状回神经兴奋性的作用机制。
方法:采用随机数字表法,将16只C57BL/6小鼠随机分为对照组(n=8)、对照+磁刺激组(n=8),将16只APP/PS1小鼠随机分为痴呆组(n=8)、痴呆+磁刺激组(n=8),对照+磁刺激组与痴呆+磁刺激组给予重复经颅磁刺激,2 h/d,连续刺激14 d。磁刺激结束后,采用水迷宫实验检测小鼠认知能力,全细胞膜片钳技术采集动作电位,分析阿尔茨海默病对动作电位的影响;全细胞膜片钳技术采集钾离子通道电流,分析其动力学特性对神经兴奋性的作用。
结果结论:①水迷宫实验结果显示,正常小鼠接受重复经颅磁刺激后能够更加精准地找到确定原平台位置,阿尔茨海默病导致小鼠学习记忆能力下降,找到平台次数下降,海马齿状回神经元退化,而重复经颅磁刺激可提高阿尔茨海默病小鼠的学习记忆能力;②全细胞膜片钳技术检测结果显示,重复经颅磁刺激能够使阿尔茨海默病小鼠神经元更容易发生去极化,使神经元更易兴奋;③钾离子通道电流分析结果显示,阿尔茨海默病使得瞬时外向钾通道半数激活电压增大,失活曲线向着去极化方向偏移,复活时间常数延长,使得延迟整流钾通道激活曲线向着去极化的方向偏移,而重复经颅磁刺激干预延迟了钾离子通道的打开与关闭,抑制了细胞内钾离子的外流,使得细胞内保持较高浓度K+,提高了神经元兴奋性;④结果表明,重复经颅磁刺激可能通过提高海马齿状回颗粒神经元兴奋性来缓解认知能力的衰退。

https://orcid.org/0009-0004-3754-2636(钱磊)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: ">重复经颅磁刺激;全细胞膜片钳;K+通道;水迷宫;神经兴奋性;学习记忆;动作电位

Abstract: BACKGROUND: Transcranial magnetic stimulation has been used in the treatment of Alzheimer’s disease, but its mechanism has not been fully clarified.
OBJECTIVE: To explore the mechanism of repetitive transcranial magnetic stimulation to increase neural excitability in mice with Alzheimer’s disease.
METHODS: Sixteen C57BL/6 mice were randomized into control group (n=8) and control+magnetic stimulation group (n=8). Another 16 APP/PS1 mice were randomized into dementia group (n=8) and dementia+magnetic stimulation group (n=8). Mice in the two magnetic stimulation groups were given repetitive transcranial magnetic stimulation, 2 hours daily, for 14 continuous days. The water maze was then used to detect the cognitive function of mice. Whole-cell membrane-clamp technique was used to collect action potentials and analyze the effect of Alzheimer’s disease on action potentials; and the potassium channel currents were collected and analyzed for the role of their kinetic properties on neural excitability.
RESULTS AND CONCLUSION: The results of Morris water maze showed that normal mice could find and determine the original platform more accurately after receiving repetitive transcranial magnetic stimulation, while Alzheimer’s disease led to a decrease in the learning and memory ability of mice, a decrease in the number of times they found the platform, and a degeneration of neurons in the hippocampal dentate gyrus. Repetitive transcranial magnetic stimulation could improve the learning and memory ability of mice with Alzheimer’s disease. Whole-cell membrane clamp technique assay showed that repetitive transcranial magnetic stimulation could trigger neuronal depolarization and enhance neuronal excitability in Alzheimer’s disease mice. Analysis of potassium channel currents showed that Alzheimer’s disease caused an increase in the transient outward potassium channel half-activation voltage. The inactivation curve was shifted in the direction of depolarization and the resuscitation time constant was prolonged, causing the delayed rectifier potassium channel activation curve to be shifted in the direction of depolarization. Whereas repetitive transcranial magnetic stimulation delayed the opening and closing of the potassium channel and inhibit the efflux of intracellular potassium ions, which resulted in the retention of a higher intracellular potassium concentration and increased neuronal excitability. To conclude, repetitive transcranial magnetic stimulation may alleviate cognitive decline by increasing neuronal excitability in the hippocampal dentate gyrus.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

Key words:  repetitive transcranial magnetic stimulation, whole-cell membrane clamp, K+ channels, water maze, neuronal excitability, learning memory, action potential

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