Volume 10, Issue 12 pp. 1657-1664
Full Article

Optomechanical measurement of the role of lamins in whole cell deformability

Thorsten Kolb

Thorsten Kolb

Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 91, 91052 Erlangen, Germany

Division of Molecular Genetics, Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany

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Julia Kraxner

Julia Kraxner

Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 91, 91052 Erlangen, Germany

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Kai Skodzek

Kai Skodzek

Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot-Watt University, Edinburgh, EH14 4AS UK

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Michael Haug

Michael Haug

Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 91, 91052 Erlangen, Germany

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Dean Crawford

Dean Crawford

Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot-Watt University, Edinburgh, EH14 4AS UK

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Kendra K. Maaß

Kendra K. Maaß

Division of Molecular Genetics, Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany

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Katerina E. Aifantis

Katerina E. Aifantis

Lab of Mechanics and Materials, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

Department of Civil Engineering-Engineering Mechanics, University of Arizona, Tuscon, Arizona, 85721

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Graeme Whyte

Corresponding Author

Graeme Whyte

Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 91, 91052 Erlangen, Germany

Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot-Watt University, Edinburgh, EH14 4AS UK

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First published: 09 May 2017
Citations: 3

Abstract

There is mounting evidence that the nuclear envelope, and particularly the lamina, plays a critical role in the mechanical and regulation properties of the cell and changes to the lamina can have implications for the physical properties of the whole cell. In this study we demonstrate that the optical stretcher can measure changes in the time-dependent mechanical properties of living cells with different levels of A-type lamin expression. Results from the optical stretcher shows a decrease in the deformability of cells as the levels of lamin A increases, for cells which grow both adherently and in suspension. Further detail can be probed by combining the optical stretcher with fluorescence microscopy to investigate the nuclear mechanical properties which show a larger decrease in deformability than for the whole cell.

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