Direct Observation of Nanomechanical Properties of Chromatin in Living Cells

Vries de, Anthony H.B. and Krenn, Bea E. and Driel van, Roel and Subramaniam, Vinod and Kanger, Johannes S. (2007) Direct Observation of Nanomechanical Properties of Chromatin in Living Cells. Nano letters, 7 (5). pp. 1424-1427. ISSN 1530-6984

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Abstract:	Precise manipulation of nanometer-sized magnetic particles using magnetic tweezers has yielded insights into the rheology of the cell cytoplasm. We present first results using this approach to study the nanomechanics of the cell nucleus. Using a custom-designed micro-magnetic-tweezers instrument, we can achieve sufficiently high magnetic forces enabling the application and measurement of controlled distortion of the internal nuclear structure on the nanometer scale. We precisely measure the elasticity and viscosity inside the nucleus of living HeLa cells. The high value of the Young's modulus (γ = 2.5 × 102 Pa) measured relative to the cytoplasm is explained by a large-scale model for in vivo chromatin structure using a polymer network model.
Item Type:	Article
Copyright:	© 2007 American Chemical Society
Faculty:	Science and Technology (TNW)
Research Group:	Nano-Biophysics (NBP)
Link to this item:	http://purl.utwente.nl/publications/59469
Official URL:	http://dx.doi.org/10.1021/nl070603+
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