从量子内容的随机动态推断突触传输:一种分析方法
Zahra Vahdat1, Oliver Gambrell1, Jonas Fisch2
1Department of Electrical and Computer Engineering, University of Delaware, Newark, Delaware, United States of America.
PLoS computational biology
|May 13, 2025
概括
这项研究引入了突触传输的新模型,揭示了量子内容波动如何揭示隐藏的突触前参数. 这种方法为神经递质释放动态提供了更深入的见解.
科学领域:
- 神经科学是一个神经科学.
- 计算生物学 计算生物学
- 生物物理学的生物物理.
背景情况:
- 突触传输依赖于神经递质的量子释放,这个过程由复杂的突触前动力学控制.
- 了解突触囊泡 (SV) 释放的随机性质对于破译神经元间通信至关重要.
- 现有的模型往往简化了SV对接,解接和融合的概率和动态方面.
研究的目的:
- 为量子内容 (QC) 的随机动态开发一个一般的建模框架.
- 导出QC随时间的统计分布,并分析其稳定状态属性.
- 为了证明QC波动统计如何推断关键的前突触参数,包括释放和重新填充的概率.
主要方法:
- 制定一个一般类型的模型,用于量子内容动态.
- 导出QC随时间的确切统计分布.
- 稳态QC分布和自相关函数的分析.
- 对MNTB-LSO突触的电生理学数据进行模型预测测试.
主要成果:
- QC波动统计为推断前突触参数提供了一个强大的工具.
- 具有恒定的低释放/重新填充概率的简单模型无法解释观察到的突触抑郁和QC统计数据 (低法诺因子,无关联的QC).
- 一个将高释放概率与时间变化的补充概率相结合的模型准确地解释了突触抑郁和统计波动.
结论:
- 量子内容中的随机签名提供了一种探测神经传递调节过程的方法.
- 这种方法超越了分析平均突触反应的局限性,以了解突触前功能.
- 开发的模型提供了更准确的突触囊泡动力学和神经递质释放的表现.
相关概念视频
01:09Synaptic Signaling
5.4K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
5.4K
01:28Integration of Synaptic Events
1.3K
Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability...
1.3K
01:26Chemical Synapses
8.6K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
8.6K
02:47The Synapse
120.2K
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
120.2K
01:26Fusion of Secretory Vesicles with the Plasma Membrane
9.7K
Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
9.7K
01:28Neuronal Communication
681
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
681