相关实验视频
Updated: Jan 12, 2026

10:18
Biosensing Motor Neuron Membrane Potential in Live Zebrafish Embryos
Published on: June 26, 2017
7.1K
在SH-SY5Y衍生神经元表达的和导电量上评估一种新的基于riluzole的化合物VA945
J Cazzola1, F Talpo1, G Faravelli1
1Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, Pavia, Italy.
Journal of neurochemistry
|October 31, 2025
概括
一种新的化合物VA945通过调节离子通道活性来显示潜在的神经保护作用. 这种riluzole衍生物可能会在像ALS这样的神经退行性疾病中对激发性毒性产生增强作用.
科学领域:
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
- 离子通道生理学 离子通道生理学
背景情况:
- 里卢是一种经批准用于ALS的神经保护剂,但其疗效有限.
- 兴奋毒性是神经退行性疾病的一个关键机制.
研究的目的:
- 为了功能性地表征VA945,一种基于riluzole的新型化合物.
- 通过检查VA945对神经元离子电流的影响来评估VA945的神经保护潜力.
主要方法:
- 利用SH-SY5Y人类神经母细胞瘤细胞分化成神经元.
- 采用全细胞补丁技术来测量电压依赖的Na+和K+电流.
- 在5,50和100μM的细胞外度下测试VA945.
主要成果:
- VA945降低了Na+导电性的最大激活和失活以及K+导电性的最大激活.
- 观察到激活/非激活曲线的超极化转移以及对Na+和K+通道的电压灵敏度的变化.
- 发现K+通道失活动力学减缓,而其他动力学没有受到影响.
结论:
- VA945对参与激发毒性的神经元离子电流表现出多目标的药理作用.
- 这些发现表明,VA945需要进一步研究其在体内的神经保护潜力.
相关概念视频
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein
804
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...
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...
804
Antiepileptic Drugs: Potassium Channel Activators
620
Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
Ezogabine has gained approval as an adjunctive treatment...
620
Voltage-gated Ion Channels
10.3K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
10.3K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
3.7K
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...
3.7K

