Integration of Synaptic Vesicle Cargo Retrieval with Endocytosis at Central Nerve Terminals.

Integration of Synaptic Vesicle Cargo Retrieval with Endocytosis at Central Nerve Terminals.
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DOI:
10.3389/fncel.2017.00234
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发表时间:
2017
影响因子:
5.3
通讯作者:
Cousin MA
Cousin MA
中科院分区:
医学2区
文献类型:
--
作者:
Cousin MA

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中枢神经终末含有数量有限的突触囊泡(SV),其在活动依赖性融合期间介导神经递质释放的基本过程。快速准确地形成新的SV与适当的货物是必不可少的,以维持哺乳动物大脑中的神经传递。产生含有具有适当化学计量的正确SV货物的SV是一个重大挑战,特别是当中枢神经末梢中存在多种内吞模式时,其发生在神经末梢内的不同位置。这些内吞作用模式包括超快内吞作用、网格蛋白介导的内吞作用(CME)和活性依赖性大量内吞作用(ADBE),其由特定的神经元活性模式触发。这篇综述文章将评估经典衔接蛋白复合物在SV检索中的作用的证据,讨论单体衔接子的作用以及特定SV货物之间的相互作用如何促进检索。此外,它将考虑预先组装的质膜货物复合物的证据,以及它们在促进这些内吞模式的作用。最后,它将提出一个统一的模型,货物检索在突触前,整合内吞模式的时间和空间。
Central nerve terminals contain a limited number of synaptic vesicles (SVs) which mediate the essential process of neurotransmitter release during their activity-dependent fusion. The rapid and accurate formation of new SVs with the appropriate cargo is essential to maintain neurotransmission in mammalian brain. Generating SVs containing the correct SV cargo with the appropriate stoichiometry is a significant challenge, especially when multiple modes of endocytosis exist in central nerve terminals, which occur at different locations within the nerve terminals. These endocytosis modes include ultrafast endocytosis, clathrin-mediated endocytosis (CME) and activity-dependent bulk endocytosis (ADBE) which are triggered by specific patterns of neuronal activity. This review article will assess the evidence for the role of classical adaptor protein complexes in SV retrieval, discuss the role of monomeric adaptors and how interactions between specific SV cargoes can facilitate retrieval. In addition it will consider the evidence for preassembled plasma membrane cargo complexes and their role in facilitating these endocytosis modes. Finally it will present a unifying model for cargo retrieval at the presynapse, which integrates endocytosis modes in time and space.
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