Extrasynaptic vesicle recycling in mature hippocampal neurons.
Extrasynaptic vesicle recycling in mature hippocampal neurons.
复制标题
成熟海马神经元的突触外囊泡回收。
DOI:
10.1038/ncomms1534
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发表时间:
2011
影响因子:
16.6
通讯作者:
Ratnayaka A
中科院分区:
文献类型:
--
作者:
Ratnayaka A
Fast neuronal signalling relies on highly regulated vesicle fusion and recycling at specialized presynaptic terminals. Recently, examples of non-classical neurotransmission have also been reported, where fusion of vesicles can occur at sites remote from conventional synapses. This has potentially broad biological implications, but the underlying mechanisms are not well established. Here we show that a complete vesicle recycling pathway can occur at discrete axonal sites in mature hippocampal neurons and that extrasynaptic fusion is a robust feature of native tissue. We demonstrate that laterally mobile vesicle clusters trafficking between synaptic terminals become transiently stabilized by evoked action potentials and undergo complete but delayed Ca2+-dependent fusion along axons. This fusion is associated with dynamic actin accumulation and, subsequently, vesicles can be locally recycled, re-acidified and re-used. Immunofluorescence and ultrastructural work demonstrates that extrasynaptic fusion sites can have apposed postsynaptic specializations, suggesting that mobile vesicle recycling may underlie highly dynamic neuron–neuron communication.
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影响因子:
15.9
作者:
K. Staras
通讯作者:
K. Staras
影响因子:
56.9
作者:
BETZ, WJ;BEWICK, GS
通讯作者:
BEWICK, GS
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作者:
Beutner, D;Voets, T;Moser, T
通讯作者:
Moser, T
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Chen, Xi;Barg, Sebastian;Almers, Wolfhard
通讯作者:
Almers, Wolfhard
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通讯作者:
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