Magnetic Manipulation of Nanorods in the Nucleus of Living Cells

Overview

Journal Biophys J

Publisher Cell Press

Specialty Biophysics

Date 2011 Oct 19

PMID 22004741

Citations 27

Authors

Alfredo Celedon

Christopher M Hale

Denis Wirtz

Affiliations

Soon will be listed here.

Abstract

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.

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