Genome-scale single-cell mechanical phenotyping reveals disease-related genes involved in mitotic rounding

Yusuke Toyoda, Cedric J. Cattin, Martin P. Stewart, Ina Poser, Mirko Theis, Teymuras V. Kurzchalia, Frank Buchholz, Anthony A. Hyman () and Daniel J. Müller ()
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Yusuke Toyoda: Max Planck Institute of Molecular Cell Biology and Genetics
Cedric J. Cattin: Eidgenössische Technische Hochschule (ETH) Zurich
Martin P. Stewart: Eidgenössische Technische Hochschule (ETH) Zurich
Ina Poser: Max Planck Institute of Molecular Cell Biology and Genetics
Mirko Theis: University of Technology Dresden
Teymuras V. Kurzchalia: Max Planck Institute of Molecular Cell Biology and Genetics
Frank Buchholz: Max Planck Institute of Molecular Cell Biology and Genetics
Anthony A. Hyman: Max Planck Institute of Molecular Cell Biology and Genetics
Daniel J. Müller: Eidgenössische Technische Hochschule (ETH) Zurich

Nature Communications, 2017, vol. 8, issue 1, 1-11

Abstract: Abstract To divide, most animal cells drastically change shape and round up against extracellular confinement. Mitotic cells facilitate this process by generating intracellular pressure, which the contractile actomyosin cortex directs into shape. Here, we introduce a genome-scale microcantilever- and RNAi-based approach to phenotype the contribution of > 1000 genes to the rounding of single mitotic cells against confinement. Our screen analyzes the rounding force, pressure and volume of mitotic cells and localizes selected proteins. We identify 49 genes relevant for mitotic rounding, a large portion of which have not previously been linked to mitosis or cell mechanics. Among these, depleting the endoplasmic reticulum-localized protein FAM134A impairs mitotic progression by affecting metaphase plate alignment and pressure generation by delocalizing cortical myosin II. Furthermore, silencing the DJ-1 gene uncovers a link between mitochondria-associated Parkinson’s disease and mitotic pressure. We conclude that mechanical phenotyping is a powerful approach to study the mechanisms governing cell shape.

Date: 2017
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DOI: 10.1038/s41467-017-01147-6

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