Noninvasive neuron pinning with nanopillar arrays.

Noninvasive neuron pinning with nanopillar arrays.
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DOI:
10.1021/nl101950x
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发表时间:
2010-10-13
期刊:
影响因子:
10.8
通讯作者:
Cui Y
Cui Y
中科院分区:
材料科学1区
文献类型:
--
作者:
Xie C;Hanson L;Xie W;Lin Z;Cui B;Cui Y

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培养的神经元网络中的细胞迁移对长时间选择性地测量同一神经元的活性构成了障碍。在这里,我们报告使用纳米柱阵列以非侵入性方式固定神经元的位置。从表面突出的垂直纳米柱用作比平坦表面在几何上更好的细胞附着焦点。在五天的时间内,细胞体迁移率从平坦表面上的57.8 μm显著降低到纳米柱上的3.9 μm。然而,在纳米柱阵列上生长的神经元显示出的生长模式与在平坦基底上看到的生长模式没有任何显著差异。值得注意的是,虽然神经元的细胞体被纳米柱有效地锚定,但轴突和树突可以自由生长并延伸到周围区域以形成神经元网络,这为在连接的网络中长期研究相同的神经元开辟了机会。
Cell migration in a cultured neuronal network presents an obstacle to selectively measuring the activity of the same neuron over a long period of time. Here we report the use of nanopillar arrays to pin the position of neurons in a noninvasive manner. Vertical nanopillars protruding from the surface serve as geometrically better focal adhesion points for cell attachment than a flat surface. The cell body mobility is significantly reduced from 57.8 µm on flat surface to 3.9 µm on nanopillars over five day period. Yet, neurons growing on nanopillar arrays show a growth pattern that does not differ in any significant way from that seen on a flat substrate. Notably, while the cell bodies of neurons are efficiently anchored by the nanopillars, the axons and dendrites are free to grow and elongate into the surrounding area to develop a neuronal network, which opens up opportunities for long-term study of the same neurons in connected networks.
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