Microconstriction Arrays for High-Throughput Quantitative Measurements of Cell Mechanical Properties

Janina R. Lange, Julian Steinwachs, Thorsten Kolb, Lena A. Lautscham, Irina Harder, Graeme Whyte, Ben Fabry

Research output: Contribution to journalArticle

61 Citations (Scopus)
173 Downloads (Pure)

Abstract

Abstract We describe a method for quantifying the mechanical properties of cells in suspension with a microfluidic device consisting of a parallel array of micron-sized constrictions. Using a high-speed charge-coupled device camera, we measure the flow speed, cell deformation, and entry time into the constrictions of several hundred cells per minute during their passage through the device. From the flow speed and the occupation state of the microconstriction array with cells, the driving pressure across each constriction is continuously computed. Cell entry times into microconstrictions decrease with increased driving pressure and decreased cell size according to a power law. From this power-law relationship, the cell elasticity and fluidity can be estimated. When cells are treated with drugs that depolymerize or stabilize the cytoskeleton or the nucleus, elasticity and fluidity data from all treatments collapse onto a master curve. Power-law rheology and collapse onto a master curve are predicted by the theory of soft glassy materials and have been previously shown to describe the mechanical behavior of cells adhering to a substrate. Our finding that this theory also applies to cells in suspension provides the foundation for a quantitative high-throughput measurement of cell mechanical properties with microfluidic devices.

Original languageEnglish
Pages (from-to)26-34
Number of pages9
JournalBiophysical Journal
Volume109
Issue number1
Early online date7 Jul 2015
DOIs
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Biophysics

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