Role of cytoplasmic dynein in the axonal transport of microtubules and neurofilaments.

Role of cytoplasmic dynein in the axonal transport of microtubules and neurofilaments.
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细胞质动力蛋白在微管和神经丝的轴突转运中的作用。

DOI:
10.1083/jcb.200407191
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发表时间:
2005-02-28
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Baas PW
Baas PW
中科院分区:
其他
文献类型:
--
作者:
He Y;Francis F;Myers KA;Yu W;Black MM;Baas PW

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最近的研究表明,微管(MT)和神经丝(NF)在轴突内的运输是快速的,不频繁的,异步的,双向的。在这里,我们使用RNA干扰来研究细胞质动力蛋白在这些运输事件中的作用。为了揭示MT和NF的运输,我们在培养的大鼠交感神经元中表达了EGFP标记的微管蛋白或NF蛋白,并对轴突光漂白区域中的荧光细胞骨架元素进行了活细胞成像。顺行MT和逆行NF运动的发生显着减少,已耗尽的动力蛋白重链的神经元,而逆行MT和顺行NF运动的发生不受影响。这些结果支持NF运输的货物模型和MT运输的滑动细丝模型。
Recent studies have shown that the transport of microtubules (MTs) and neurofilaments (NFs) within the axon is rapid, infrequent, asynchronous, and bidirectional. Here, we used RNA interference to investigate the role of cytoplasmic dynein in powering these transport events. To reveal transport of MTs and NFs, we expressed EGFP-tagged tubulin or NF proteins in cultured rat sympathetic neurons and performed live-cell imaging of the fluorescent cytoskeletal elements in photobleached regions of the axon. The occurrence of anterograde MT and retrograde NF movements was significantly diminished in neurons that had been depleted of dynein heavy chain, whereas the occurrence of retrograde MT and anterograde NF movements was unaffected. These results support a cargo model for NF transport and a sliding filament model for MT transport.
DOI: 10.1002/jnr.20399
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影响因子: 4.2
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