相关实验视频

Updated: Jul 15, 2025

Dual Electrophysiological Recordings of Synaptically-evoked Astroglial and Neuronal Responses in Acute Hippocampal Slices

Dual Electrophysiological Recordings of Synaptically-evoked Astroglial and Neuronal Responses in Acute Hippocampal Slices

Published on: November 26, 2012

在星球细胞中Optoα1AR激活调节基底海马突触刺激和抑制以一种刺激特异的方式

Connor D Courtney¹, Courtney Sobieski^2,3, Charu Ramakrishnan⁴

¹Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, Illinois, USA.

|September 28, 2023

概括

使用Optoα1AR调节的海马突触传输,使用高频光刺激星体细胞,影响抑制和刺激后突触电流. 低频刺激没有改变突触活动,这表明刺激依赖的星细胞Gq信号传递.

科学领域:

神经科学是一个神经科学.
细胞神经科学细胞神经科学
突触生理学突触生理学

背景情况:

天体细胞积极参与突触功能,影响神经元的通信.
虽然激发性海马突触的天体细胞调节记录得很好,但它们在突触抑制中的作用不太清楚.
需要精确的工具来研究突触调制中的天体细胞特异信号通路.

研究的目的:

通过使用一种新的光遗传工具,研究星细胞Gq信号在调节海马突触传输中的作用.
为了确定不同光刺激频率对天体细胞介导的突触效应的影响.
为了比较Optoα1AR与道罗多普辛 (ChR2) 在调节突触活动中的有效性.

主要方法:

利用AAV8-GFAP-Optoα1AR-eYFP来表达光敏感的星体细胞中的Gq结合受体.
在海马体的CA1金字塔细胞中进行了电生理学记录.
应用高频率 (20 Hz) 和低频率 (0.5 Hz) 的蓝光刺激对表达Optoα1AR,ChR2或GFP的星细胞.

主要成果:

高频Optoα1AR刺激显著增加了抑制性 (IPSC) 和刺激性 (EPSC) 后突触电流的频率.
高频Optoα1AR刺激对微型IPSC (mIPSC) 的影响在很大程度上是可逆的.
低频Optoα1AR刺激没有调节IPSC或EPSC,而低频ChR2刺激是这样做的.
hippocampal 突触传输的星细胞Gq-依赖调制取决于刺激频率和时间动态.

结论:

在星球细胞中的optoα1AR激活可以调节基底GABAergic和glutamatergic在海马体中的传播.
观察到的天体细胞调制依赖于高频刺激,这凸显了光遗传学操纵中时间参数的重要性.
这些发现提供了关于天体细胞参与调节海马突触可塑性的见解,并为未来的研究提供了一个工具.

关键词:

对于GABA来说,这是一个很好的选择.格利亚 (Glia) 是一个.谷氨酸酸盐的使用方法在海马体内,海马体视觉遗传学视觉遗传学

更多相关视频

Inducing Plasticity of Astrocytic Receptors by Manipulation of Neuronal Firing Rates

Inducing Plasticity of Astrocytic Receptors by Manipulation of Neuronal Firing Rates

Published on: March 20, 2014

Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes

Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes

Published on: October 4, 2018

相关概念视频

Ligand-Gated Ion Channel Receptor: Gating Mechanism

Ligand-Gated Ion Channel Receptor: Gating Mechanism

Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...

Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein

Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein

Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...