Exendin-4 通过 TRPC4/5 通道增加海马 CA1 神经元的发射活动

IF 2.4 4区 医学 Q3 NEUROSCIENCES
Hui-Zhe Sun , Fang-Shuai Shen , Xiao-Xue Li , Cui Liu , Yan Xue , Xiao-Hua Han , Xin-Yi Chen , Lei Chen
{"title":"Exendin-4 通过 TRPC4/5 通道增加海马 CA1 神经元的发射活动","authors":"Hui-Zhe Sun ,&nbsp;Fang-Shuai Shen ,&nbsp;Xiao-Xue Li ,&nbsp;Cui Liu ,&nbsp;Yan Xue ,&nbsp;Xiao-Hua Han ,&nbsp;Xin-Yi Chen ,&nbsp;Lei Chen","doi":"10.1016/j.neures.2023.08.001","DOIUrl":null,"url":null,"abstract":"<div><p>The central neuropeptide GLP-1 is synthesized by preproglucagon (PPG) neurons in the brain. GLP-1 receptors are widely distributed in central nervous system. Hippocampus is a key component of the limbic system which is involved in learning, memory, and cognition. Previous studies have shown that overexpression of GLP-1 receptors in the hippocampus could improve the process of learning and memory. However, up to now, the direct electrophysiological effects and possible molecular mechanisms of GLP-1 in hippocampal CAl neurons remain unexplored. The present study aims to evaluate the effects and mechanisms of GLP-1 on the spontaneous firing activity of hippocampal CAl neurons. Employing multibarrel single-unit extracellular recordings, the present study showed that micro-pressure administration of GLP-1 receptor agonist, exendin-4, significantly increased the spontaneous firing rate of hippocampal CA1 neurons in rats. Furthermore, application of the specific GLP-1 receptor antagonist, exendin(9−39), alone significantly decreased the firing rate of CA1 neurons, suggesting that endogenous GLP-1 modulates the firing activity of CA1 neurons. Co-application of exendin(9−39) completely blocked exendin-4-induced excitation of hippocampal CA1 neurons. Finally, the present study demonstrated for the first time that the transient receptor potential canonical 4 (TRPC4)/TRPC5 channels may be involved in exendin-4-induced excitation. The present studies may provide a rationale for further investigation of the modulation of GLP-1 on learning and memory as well as its possible involvement in Alzheimer's disease.</p></div>","PeriodicalId":19146,"journal":{"name":"Neuroscience Research","volume":"199 ","pages":"Pages 48-56"},"PeriodicalIF":2.4000,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0168010223001529/pdfft?md5=3c032f77878b6ebabdc16cc54b988986&pid=1-s2.0-S0168010223001529-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Exendin-4 increases the firing activity of hippocampal CA1 neurons through TRPC4/5 channels\",\"authors\":\"Hui-Zhe Sun ,&nbsp;Fang-Shuai Shen ,&nbsp;Xiao-Xue Li ,&nbsp;Cui Liu ,&nbsp;Yan Xue ,&nbsp;Xiao-Hua Han ,&nbsp;Xin-Yi Chen ,&nbsp;Lei Chen\",\"doi\":\"10.1016/j.neures.2023.08.001\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The central neuropeptide GLP-1 is synthesized by preproglucagon (PPG) neurons in the brain. GLP-1 receptors are widely distributed in central nervous system. Hippocampus is a key component of the limbic system which is involved in learning, memory, and cognition. Previous studies have shown that overexpression of GLP-1 receptors in the hippocampus could improve the process of learning and memory. However, up to now, the direct electrophysiological effects and possible molecular mechanisms of GLP-1 in hippocampal CAl neurons remain unexplored. The present study aims to evaluate the effects and mechanisms of GLP-1 on the spontaneous firing activity of hippocampal CAl neurons. Employing multibarrel single-unit extracellular recordings, the present study showed that micro-pressure administration of GLP-1 receptor agonist, exendin-4, significantly increased the spontaneous firing rate of hippocampal CA1 neurons in rats. Furthermore, application of the specific GLP-1 receptor antagonist, exendin(9−39), alone significantly decreased the firing rate of CA1 neurons, suggesting that endogenous GLP-1 modulates the firing activity of CA1 neurons. Co-application of exendin(9−39) completely blocked exendin-4-induced excitation of hippocampal CA1 neurons. Finally, the present study demonstrated for the first time that the transient receptor potential canonical 4 (TRPC4)/TRPC5 channels may be involved in exendin-4-induced excitation. The present studies may provide a rationale for further investigation of the modulation of GLP-1 on learning and memory as well as its possible involvement in Alzheimer's disease.</p></div>\",\"PeriodicalId\":19146,\"journal\":{\"name\":\"Neuroscience Research\",\"volume\":\"199 \",\"pages\":\"Pages 48-56\"},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2024-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0168010223001529/pdfft?md5=3c032f77878b6ebabdc16cc54b988986&pid=1-s2.0-S0168010223001529-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Neuroscience Research\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0168010223001529\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"NEUROSCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Neuroscience Research","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0168010223001529","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"NEUROSCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

中枢神经肽 GLP-1 由大脑中的前胰高血糖素(PPG)神经元合成。GLP-1 受体广泛分布于中枢神经系统。海马是边缘系统的重要组成部分,参与学习、记忆和认知。先前的研究表明,在海马体中过表达 GLP-1 受体可改善学习和记忆过程。然而,迄今为止,GLP-1 在海马 CAl 神经元中的直接电生理效应和可能的分子机制仍未得到探索。本研究旨在评估 GLP-1 对海马 CAl 神经元自发发射活动的影响和机制。通过多管单细胞外记录,本研究发现微压给药 GLP-1 受体激动剂 exendin-4 能显著提高大鼠海马 CA1 神经元的自发发射率。此外,单独应用特异性 GLP-1 受体拮抗剂 exendin(9-39)会明显降低 CA1 神经元的发射率,这表明内源性 GLP-1 可调节 CA1 神经元的发射活动。联合应用外显素(9-39)可完全阻断外显素-4诱导的海马CA1神经元兴奋。最后,本研究首次证明瞬时受体电位4(TRPC4)/TRPC5通道可能参与了外显素-4诱导的兴奋。本研究为进一步研究 GLP-1 对学习和记忆的调节作用及其可能与阿尔茨海默病的关系提供了理论依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exendin-4 increases the firing activity of hippocampal CA1 neurons through TRPC4/5 channels

The central neuropeptide GLP-1 is synthesized by preproglucagon (PPG) neurons in the brain. GLP-1 receptors are widely distributed in central nervous system. Hippocampus is a key component of the limbic system which is involved in learning, memory, and cognition. Previous studies have shown that overexpression of GLP-1 receptors in the hippocampus could improve the process of learning and memory. However, up to now, the direct electrophysiological effects and possible molecular mechanisms of GLP-1 in hippocampal CAl neurons remain unexplored. The present study aims to evaluate the effects and mechanisms of GLP-1 on the spontaneous firing activity of hippocampal CAl neurons. Employing multibarrel single-unit extracellular recordings, the present study showed that micro-pressure administration of GLP-1 receptor agonist, exendin-4, significantly increased the spontaneous firing rate of hippocampal CA1 neurons in rats. Furthermore, application of the specific GLP-1 receptor antagonist, exendin(9−39), alone significantly decreased the firing rate of CA1 neurons, suggesting that endogenous GLP-1 modulates the firing activity of CA1 neurons. Co-application of exendin(9−39) completely blocked exendin-4-induced excitation of hippocampal CA1 neurons. Finally, the present study demonstrated for the first time that the transient receptor potential canonical 4 (TRPC4)/TRPC5 channels may be involved in exendin-4-induced excitation. The present studies may provide a rationale for further investigation of the modulation of GLP-1 on learning and memory as well as its possible involvement in Alzheimer's disease.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Neuroscience Research
Neuroscience Research 医学-神经科学
CiteScore
5.60
自引率
3.40%
发文量
136
审稿时长
28 days
期刊介绍: The international journal publishing original full-length research articles, short communications, technical notes, and reviews on all aspects of neuroscience Neuroscience Research is an international journal for high quality articles in all branches of neuroscience, from the molecular to the behavioral levels. The journal is published in collaboration with the Japan Neuroscience Society and is open to all contributors in the world.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信