Magnetic manipulation of nanorods in the nucleus of living cells

Alfredo Celedon, Christopher M. Hale, Denis Wirtz

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)1880-1886
Number of pages7
JournalBiophysical journal
Volume101
Issue number8
DOIs
StatePublished - Oct 19 2011

ASJC Scopus subject areas

  • Biophysics

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