Mechanical stress as a regulator of cell motility

T. Putelat, P. Recho, L. Truskinovsky

Research output: Contribution to journalArticle (Academic Journal)

3 Citations (Scopus)
229 Downloads (Pure)

Abstract

The motility of a cell can be triggered or inhibited not only by an applied force but also by a mechanically neutral force couple. This type of loading, represented by an applied stress and commonly interpreted as either squeezing or stretching, can originate from extrinsic interaction of a cell with its neighbors. To quantify the effect of applied stresses on cell motility we use an analytically transparent one-dimensional model accounting for active myosin contraction and induced actin turnover. We show that stretching can polarize static cells and initiate cell motility while squeezing can symmetrize and arrest moving cells. We show further that sufficiently strong squeezing can lead to the loss of cell integrity. The overall behavior of the system depends on the two dimensionless parameters characterizing internal driving (chemical activity) and external loading (applied stress). We construct a phase diagram in this parameter space distinguishing between static, motile, and collapsed states. The obtained results are relevant for the mechanical understanding of contact inhibition and the epithelial-to-mesenchymal transition.

Original languageEnglish
Article number012410
JournalPhysical Review E
Volume97
Issue number1
DOIs
Publication statusPublished - 22 Jan 2018

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    Engineering Nonlinearity

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    Cite this

    Putelat, T., Recho, P., & Truskinovsky, L. (2018). Mechanical stress as a regulator of cell motility. Physical Review E, 97(1), [012410]. https://doi.org/10.1103/PhysRevE.97.012410