光遗传作用潜力和内在节拍器相互作用在逆向识别的中脑多巴胺神经元中
Niklas Hammer1, Pascal Vogel1, Sanghun Lee1
1Institute of Neurophysiology, Neuroscience Center, Goethe University Frankfurt, Germany.
The European journal of neuroscience
|December 6, 2023
概括
这项研究通过开发选择性逆向病毒标记方法来完善中脑多巴胺 (DA) 神经元的光标记. 这种技术准确地描述了光遗传引起的动作潜力及其与内在神经元活动的相互作用.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 视觉遗传学 视觉遗传学
背景情况:
- 中脑中的多巴胺 (DA) 神经元对于有动机的行为至关重要.
- 光标记提供了一种研究DA神经元功能的方法,但需要精确的准.
- 反向分子准可以通过专注于特定的神经元投影来完善光标记.
研究的目的:
- 验证一种新的逆向病毒标记策略,以准特定的中脑多巴胺神经元群体.
- 描述光遗传刺激的DA神经元的功能性质.
- 研究光遗传学唤起的动作潜能与内在神经元发射模式之间的相互作用.
主要方法:
- 在DAT-cre小鼠中使用了基于AAV9的逆行通道rhodopsin-eYFP (ChR-eYFP) 病毒载体.
- 使用光标记和电生理记录来分析神经元活动.
- 用红色珠子将ChR-eYFP标记的神经元与传统标记的神经元进行了比较.
主要成果:
- 证明了ChR-eYFP标记方法对Snc DA神经元向DS投射的选择性.
- 展示了稀疏标签对于单细胞解剖重建的实用性.
- 发现光遗传唤起的动作潜能 (oAPs) 与自发的APs (sAPs) 相比,具有不同的形状和时间.
- 观察到,oAP时间通过诱导补偿性暂停来影响内在节律.
结论:
- 开发的逆向病毒标记方法为针对和研究特定的DA神经元亚群提供了精细的方法.
- 由光遗传引起的动作潜能表现出与内在神经元发射动态相互作用的独特特性.
- 这种表征增强了对DA神经元光标记在体内应用中的理解.
相关概念视频
01:31Action Potential
8.0K
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they...
8.0K
01:28Action Potential: Phases of Stimulation
5.9K
The action potential is a complex electrical event that occurs in excitable cells, such as neurons and muscle cells. It consists of several distinct phases, each with specific characteristics.
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
5.9K
01:24Generation of Action Potential in Skeletal Muscles
4.5K
Every cell in the body maintains a membrane potential due to an uneven distribution of positive and negative charges across its plasma membrane. The membrane potential is measured in millivolts and quantifies the difference in charge across the membrane.
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the...
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the...
4.5K