Vertical nanopillars for in situ probing of nuclear mechanics in adherent cells.

Vertical nanopillars for in situ probing of nuclear mechanics in adherent cells.
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用于原位探测粘附细胞核力学的垂直纳米柱。

DOI:
10.1038/nnano.2015.88
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发表时间:
2015-06
影响因子:
38.3
通讯作者:
--
中科院分区:
材料科学1区
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--
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细胞核的机械稳定性和变形性对许多生物过程至关重要,包括迁移、增殖和极化。在活体中,细胞核经常受到各种长度和时间尺度的变形,但目前研究核力学的技术不能提供在活的功能细胞中进行亚核变形的途径。在这里,我们介绍了垂直纳米管阵列作为一种新的方法,用于原位研究活细胞中细胞核的变形性和细胞膜与细胞核之间的机械耦合。我们的测量表明,纳米管诱导的核变形是由核硬度以及肌动蛋白和中间丝的相反效应决定的。此外,可以通过改变纳米柱阵列的几何形状来控制核变形的深度、宽度和曲率。总体而言,垂直纳米微管阵列构成了一种新的方法,用于在活细胞中进行核力学和机械转导的非侵入性亚细胞微扰。
The mechanical stability and deformability of the cell nucleus are crucial to many biological processes, including migration, proliferation and polarization. In vivo, the cell nucleus is frequently subjected to deformation on a variety of length and time scales, but current techniques for studying nuclear mechanics do not provide access to subnuclear deformation in live functioning cells. Here we introduce arrays of vertical nanopillars as a new method for the in situ study of nuclear deformability and the mechanical coupling between the cell membrane and the nucleus in live cells. Our measurements show that nanopillar-induced nuclear deformation is determined by nuclear stiffness, as well as opposing effects from actin and intermediate filaments. Furthermore, the depth, width and curvature of nuclear deformation can be controlled by varying the geometry of the nanopillar array. Overall, vertical nanopillar arrays constitute a novel approach for non-invasive, subcellular perturbation of nuclear mechanics and mechanotransduction in live cells.
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