Magnetic Manipulation of Nanorods in the Nucleus of Living Cells
The organization of chromatin in the cell nucleus is crucial for gene expression regulation. However, physically probing the nuclear interior is challenging because high forces have to be applied using minimally invasive techniques. Here, magnetic nanorods embedded in the nucleus of living cells are...
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Veröffentlicht in: | Biophysical journal 2011-10, Vol.101 (8), p.1880-1886 |
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creator | Celedon, Alfredo Hale, Christopher M. Wirtz, Denis |
description | The organization of chromatin in the cell nucleus is crucial for gene expression regulation. However, physically probing the nuclear interior is challenging because high forces have to be applied using minimally invasive techniques. Here, magnetic nanorods embedded in the nucleus of living cells are subjected to controlled rotational forces, producing micron-sized displacements in the nuclear interior. The resulting time-dependent rotation of the nanorods is analyzed in terms of viscoelastic parameters of the nucleus, in wild-type and Lamin A/C deficient cells. This method and analysis reveal that Lamin A/C knockout, together perhaps with other changes that result from the knockout, induce significant decreases in the nuclear viscosity and elasticity. |
doi_str_mv | 10.1016/j.bpj.2011.09.008 |
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subjects | Animals Biomechanical Phenomena Cell Line Cell Nucleus - metabolism Cell Survival Cells Cellular Biophysics and Electrophysiology Chromatin Chromatin - metabolism Elasticity Gene expression gene expression regulation Gene Knockout Techniques Lamin Type A - deficiency Lamin Type A - genetics Magnetic Fields Mice nanorods Nanotubes Rotation Viscoelasticity Viscosity |
title | Magnetic Manipulation of Nanorods in the Nucleus of Living Cells |
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