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Issue 44, 2019
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Glassy dynamics in models of confluent tissue with mitosis and apoptosis

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Abstract

Recent work on particle-based models of tissues has suggested that any finite rate of cell division and cell death is sufficient to fluidize an epithelial tissue. At the same time, experimental evidence has indicated the existence of glassy dynamics in some epithelial layers despite continued cell cycling. To address this discrepancy, we quantify the role of cell birth and death on glassy states in confluent tissues using simulations of an active vertex model that includes cell motility, cell division, and cell death. Our simulation data is consistent with a simple ansatz in which the rate of cell-life cycling and the rate of relaxation of the tissue in the absence of cell cycling contribute independently and additively to the overall rate of cell motion. Specifically, we find that a glass-like regime with caging behavior indicated by subdiffusive cell displacements can be achieved in systems with sufficiently low rates of cell cycling.

Graphical abstract: Glassy dynamics in models of confluent tissue with mitosis and apoptosis

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Publication details

The article was received on 05 May 2019, accepted on 27 Sep 2019 and first published on 01 Nov 2019


Article type: Paper
DOI: 10.1039/C9SM00916G
Soft Matter, 2019,15, 9133-9149

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    Glassy dynamics in models of confluent tissue with mitosis and apoptosis

    M. Czajkowski, D. M. Sussman, M. C. Marchetti and M. L. Manning, Soft Matter, 2019, 15, 9133
    DOI: 10.1039/C9SM00916G

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