Dynamics of presynaptic protein recruitment induced by local presentation of artificial adhesive contacts.

Dynamics of presynaptic protein recruitment induced by local presentation of artificial adhesive contacts.
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DOI:
10.1002/dneu.22037
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发表时间:
2013-01
影响因子:
3
通讯作者:
Grutter, Peter
Grutter, Peter
中科院分区:
医学3区
文献类型:
--
作者:
Suarez, Fernando;Thostrup, Peter;Colman, David;Grutter, Peter

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在这里,我们介绍了一种新的方法来诱导和观察突触前区室的轴突通过原子力显微镜(AFM)和荧光显微镜相结合的形成。首先,我们使用一个多聚-D-赖氨酸涂层珠连接到AFM针尖,以诱导招聘的两个突触蛋白,巴松管和突触素,并测量其绝对到达时间的突触前部门。我们发现巴松管先于突触素到达。第二,我们观察到当AFM针尖从轴突中撤出时,形成了非常长的(几十微米),结构化的,含有蛋白质的膜串。可以想象,这些线可能是一种新的机制,通过这种机制,可以原位产生新的神经突或沿着现有神经突的分支点。
Here we introduce a novel approach to induce and observe the formation of presynaptic compartments in axons through a combination of Atomic Force Microscopy (AFM) and fluorescence microscopy. First, we use a poly-D-lysine coated bead attached to an AFM tip to induce the recruitment of two synaptic proteins, bassoon and synaptophysin, and measure their absolute arrival times to the presynaptic department. We find that bassoon arrives before synaptophysin. Second, we observed the formation of very long (several 10s of µm), structured, protein-containing membranous strings as the AFM tip was withdrawn from the axon. It is conceivable that these strings might be a novel mechanism by which new neurites or branch points along existing neurites may be generated in situ.
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巴松管是一种新型的锌指CAG/谷氨酰胺重复蛋白,选择性地定位于突触前神经末端的活性区域。
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