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The consequence of substrates of large-scale rigidity on actin network tension in adherent cells

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  • Ian Manifacier
  • Kevin M. Beussman
  • Sangyoon J. Han
  • Nathan J. Sniadecki
  • Imad About
  • Jean-Louis Milan

Abstract

There is compelling evidence that substrate stiffness affects cell adhesion as well as cytoskeleton organization and contractile activity. This work was designed to study the cytoskeletal contractile activity of single cells plated on micropost substrates of different stiffness using a numerical model simulating the intracellular tension of individual cells. We allowed cells to adhere onto micropost substrates of various rigidities and used experimental traction force data to infer cell contractility using a numerical model. The model shows that higher substrate stiffness leads to an increase in intracellular tension. The strength of this model is its ability to calculate the mechanical state of each cell in accordance to its individual cytoskeletal structure. This is achieved by regenerating a numerical cytoskeleton based on microscope images of the actin network of each cell. The resulting numerical structure consequently represents pulling characteristics on its environment similar to those generated by the cell in-vivo. From actin imaging we can calculate and better understand how forces are transmitted throughout the cell.

Suggested Citation

  • Ian Manifacier & Kevin M. Beussman & Sangyoon J. Han & Nathan J. Sniadecki & Imad About & Jean-Louis Milan, 2019. "The consequence of substrates of large-scale rigidity on actin network tension in adherent cells," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 22(13), pages 1073-1082, October.
  • Handle: RePEc:taf:gcmbxx:v:22:y:2019:i:13:p:1073-1082
    DOI: 10.1080/10255842.2019.1629428
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    Cited by:

    1. Marion Jasnin & Jordan Hervy & Stéphanie Balor & Anaïs Bouissou & Amsha Proag & Raphaël Voituriez & Jonathan Schneider & Thomas Mangeat & Isabelle Maridonneau-Parini & Wolfgang Baumeister & Serge Dmit, 2022. "Elasticity of podosome actin networks produces nanonewton protrusive forces," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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