Transient docking of synaptic vesicles: Implications and mechanisms.

Transient docking of synaptic vesicles: Implications and mechanisms.
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DOI:
10.1016/j.conb.2022.102535
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发表时间:
2022-06
影响因子:
5.7
通讯作者:
--
中科院分区:
医学2区
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当突触囊泡融合时,它们必须不断地被新的对接的、有融合能力的囊泡所取代,以维持神经传递。长期以来人们已经认识到,囊泡以活性依赖性方式被募集到对接位点。然而,一旦进入位点,囊泡被认为是稳定对接的,等待钙信号。基于电生理学、电子显微镜、生物化学和计算机模拟的最新数据,出现了一幅图像,其中囊泡可以在活动期间在对接和脱离之间快速且可逆地过渡。这种“瞬时对接”可以解释突触生理学的许多方面。在这篇综述中,我们涵盖了最近的证据,短暂的对接,在突触的生理过程,它可能支持,和进展的基础机制。我们还讨论了一个悬而未决的问题:是什么决定了多久,是否囊泡停留停靠,或最终undock?
As synaptic vesicles fuse, they must continually be replaced with new docked, fusion-competent vesicles to sustain neurotransmission. It has long been appreciated that vesicles are recruited to docking sites in an activity-dependent manner. However, once entering the sites, vesicles were thought to be stably docked, awaiting calcium signals. Based on recent data from electrophysiology, electron microscopy, biochemistry, and computer simulations, a picture emerges in which vesicles can rapidly and reversibly transit between docking and undocking during activity. This ‘transient docking’ can account for many aspects of synaptic physiology. In this review, we cover recent evidence for transient docking, physiological processes at the synapse that it may support, and progress on the underlying mechanisms. We also discuss an open question: what determines for how long and whether vesicles stay docked, or eventually undock?
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