模块化前突触组合可扩展到后突触伴侣数
bioRxiv : the preprint server for biology
|January 16, 2026
概括
体中的神经回路适应不同的神经元数量的变化. 投射神经元通过调节轴突附带发育来调整它们的连接,确保对Drosophila的协会学习提供适当的感官输入.
科学领域:
- 神经科学是一个神经科学.
- 发育生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 行为多样性与神经电路的发展有关.
- 体对关联性学习至关重要,在个体和物种之间表现出可变的肯尼翁细胞数量.
- 投射神经元如何适应基尼恩细胞数量的这种变化仍然不清楚.
研究的目的:
- 阐明投影神经元将它们的突触输入量化为Drosophila melanogaster. Kenyon细胞群体大小的发育机制.
- 了解投射神经元轴突树木化如何适应波动的目标神经元数量.
主要方法:
- 研究了Drosophila melanogaster中投射神经元轴突附带和的发展.
- 利用遗传和成像技术来追踪幼发育期间的附带形成和扣子生产.
- 分析了抵押数,扣子形成和肯尼翁细胞群体大小之间的关系.
主要成果:
- 投影神经元附带数是特定于子类型的,并作为缩放按输出的基础.
- 个人抵押通常形成一个单一的按,作为模块化单元运作.
- 发育中的投射神经元最初会过度产生附带资产,最终的数量取决于基尼恩细胞群体的大小.
- 早期的子表现出与邻近的投射神经元过程相互作用的filopodia,这表明了子-子通信.
结论:
- 投射神经元在其输入结构中表现出发育可塑性,以匹配目标神经元数量.
- 轴突附带的发展和扣子的形成是体输入缩放的关键机制.
- 发育的子之间的相互作用可能在完善神经连接方面发挥作用.
相关概念视频
01:32Postsynaptic Potential (PSP)
4.9K
Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
4.9K
01:28Integration of Synaptic Events
3.5K
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 to...
3.5K
01:25Neural Circuits
2.7K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
2.7K
01:30Assembly of Signaling Complexes
6.5K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
6.5K
01:32Assembly of Complex Microtubule Structures
2.4K
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
2.4K
01:09Synaptic Signaling
6.5K
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...
6.5K