Journal
SOFT MATTER
Volume 11, Issue 37, Pages 7328-7336Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sm01382h
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Funding
- ERC Advanced Grant MiCE
- Mechanobiology Institute
- Institut Universitaire de France (IUF)
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We introduce the notion of cell division-induced activity and show that the cell division generates extensile forces and drives dynamical patterns in cell assemblies. Extending the hydrodynamic models of lyotropic active nematics we describe turbulent-like velocity fields that are generated by the cell division in a confluent monolayer of cells. We show that the experimentally measured flow field of dividing Madin-Darby Canine Kidney (MDCK) cells is reproduced by our modeling approach. Division-induced activity acts together with intrinsic activity of the cells in extensile and contractile cell assemblies to change the flow and director patterns and the density of topological defects. Finally we model the evolution of the boundary of a cellular colony and compare the fingering instabilities induced by cell division to experimental observations on the expansion of MDCK cell cultures.
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