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首页> 外文期刊>Neuron >Dynamics and regulation of clathrin coats at specialized endocytic zones of dendrites and spines.
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Dynamics and regulation of clathrin coats at specialized endocytic zones of dendrites and spines.

机译:动态和调节网格蛋白在树突和棘的特定内吞区域的作用。

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摘要

Endocytosis is a fundamental mechanism by which neurons control intercellular signaling, nutrient uptake, and synaptic transmission. This process is carried out by the assembly of clathrin coats and the budding of clathrin-coated vesicles from the neuronal plasma membrane. Here, we demonstrate that in young neurons, clathrin assembly and disassembly occur rapidly, locally, and repeatedly at "hot spots" throughout dendrites and at the tips of dendritic filopodia. In contrast, clathrin coats in mature dendrites reside in stable, long-lasting zones at sites of endocytosis, where clathrin undergoes continuous exchange with local cytosolic pools. In dendritic spines, endocytic zones lie lateral to the postsynaptic density (PSD) where they develop and persist independent of synaptic activity, akin to the PSD itself. These results reveal the presence of a novel specialization dedicated to endocytosis near the postsynaptic membrane.
机译:胞吞作用是神经元控制细胞间信号传导,营养吸收和突触传递的基本机制。该过程是通过组装网格蛋白涂层和从神经元质膜萌芽网格蛋白包被的囊泡来进行的。在这里,我们证明了在年轻的神经元中,网格蛋白的组装和分解迅速,局部地发生,并遍及整个树突的“热点”和树突状丝状伪足的尖端反复出现。相比之下,成熟树突中的网格蛋白涂层位于内吞作用位点的稳定,持久区域中,在那里网格蛋白与局部胞质池不断交换。在树突棘中,内吞区位于突触后密度(PSD)的侧面,在那里它们独立于突触活动而发展并持续存在,类似于PSD本身。这些结果揭示了在突触后膜附近存在专门用于内吞作用的新型特化的存在。

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