Noncontact measurement of the local mechanical properties of living cells using pressure applied via a pipette

Daniel Sánchez, Nick Johnson, Chao Li, Pavel Novak, Johannes Rheinlaender, Yanjun Zhang, Uma Anand, Praveen Anand, Julia Gorelik, Gregory I. Frolenkov, Christopher Benham, Max Lab, Victor P. Ostanin, Tilman E. Schäffer, David Klenerman, Yuri E. Korchev

Research output: Contribution to journalArticlepeer-review

108 Scopus citations

Abstract

Mechanosensitivity in living biological tissue is a study area of increasing importance, but investigative tools are often inadequate. We have developed a noncontact nanoscale method to apply quantified positive and negative force at defined positions to the soft responsive surface of living cells. The method uses applied hydrostatic pressure (0.1-150 kPa) through a pipette, while the pipette-sample separation is kept constant above the cell surface using ion conductance based distance feedback. This prevents any surface contact, or contamination of the pipette, allowing repeated measurements. We show that we can probe the local mechanical properties of living cells using increasing pressure, and hence measure the nanomechanical properties of the cell membrane and the underlying cytoskeleton in a variety of cells (erythrocytes, epithelium, cardiomyocytes and neurons). Because the cell surface can first be imaged without pressure, it is possible to relate the mechanical properties to the local cell topography. This method is well suited to probe the nanomechanical properties and mechanosensitivity of living cells.

Original languageEnglish
Pages (from-to)3017-3027
Number of pages11
JournalBiophysical Journal
Volume95
Issue number6
DOIs
StatePublished - Sep 15 2008

Bibliographical note

Funding Information:
This work was funded by the Biotechnology and Biological Sciences Research Council and Glaxo SmithKline.

ASJC Scopus subject areas

  • Biophysics

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