Ectosomes: a new mechanism for non-exosomal secretion of tau protein.

Ectosomes: a new mechanism for non-exosomal secretion of tau protein.
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DOI:
10.1371/journal.pone.0100760
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Colin M
Colin M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Dujardin S;Bégard S;Caillierez R;Lachaud C;Delattre L;Carrier S;Loyens A;Galas MC;Bousset L;Melki R;Aurégan G;Hantraye P;Brouillet E;Buée L;Colin M

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Tau是一种微管相关蛋白,在称为Tau病的神经退行性疾病中聚集。最近,研究表明Tau可能被分泌并在神经网络信号传导中发挥作用。然而,一旦失调,分泌的Tau也可能参与神经变性的分级途径中Tau病理的传播。神经元到神经元Tau转移的潜在机制仍然未知;鉴于细胞外囊泡在细胞到细胞通信中的已知作用,我们想知道这些囊泡是否可以携带分泌的Tau。我们发现,在囊泡中,Tau主要分泌在外体中,外体是质膜起源的囊泡,当它积累时,外泌体途径被激活。
Tau is a microtubule-associated protein that aggregates in neurodegenerative disorders known as tauopathies. Recently, studies have suggested that Tau may be secreted and play a role in neural network signalling. However, once deregulated, secreted Tau may also participate in the spreading of Tau pathology in hierarchical pathways of neurodegeneration. The mechanisms underlying neuron-to-neuron Tau transfer are still unknown; given the known role of extra-cellular vesicles in cell-to-cell communication, we wondered whether these vesicles could carry secreted Tau. We found, among vesicles, that Tau is predominately secreted in ectosomes, which are plasma membrane-originating vesicles, and when it accumulates, the exosomal pathway is activated.
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