Pulsations and flows in tissues as two collective dynamics with simple cellular rules - Archive ouverte HAL Access content directly
Journal Articles iScience Year : 2022

Pulsations and flows in tissues as two collective dynamics with simple cellular rules

(1) , (1) , (2) , (3) , (1)
1
2
3

Abstract

Collective motions of epithelial cells in vivo are essential for morphogenesis in developmental biology. Tissues elongate, contract, flow, and oscillate, thus sculpting embryos. These tissue level dynamics are known, but the physical mechanisms at the cellular level are unclear, with various behaviors depending on the tissues and species. Moreover, investigations on in vitro tissue behavior usually focus on only one type of cell dynamics and use diverse theoretical approaches, making systematic comparisons between studies challenging. Here, we show that a single epithelial monolayer of Madin Darby Canine Kidney (MDCK) cells can exhibit two types of local tissue kinematics, pulsations and long range coherent flows. We analyzed these distinct motions by using quantitative live imaging. We also report that these motions can be controlled with internal and external cues such as specific inhibitors, and friction modulation of the substrate by microcontact printing method. We further demonstrate with a unified vertex model that both behaviors depend on the competition between velocity alignment and random diffusion of cell polarization. When alignment and diffusion are comparable, a pulsatile flow emerges, whereas the tissue undergoes long-range flows when velocity alignment dominates. We propose that environmental friction, acto-myosin distributions, and cell polarization kinetics are important in regulating the dynamics of tissue morphogenesis.
Fichier principal
Vignette du fichier
2020.07.29.226357v4.full.pdf (3.61 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03834486 , version 1 (30-10-2022)

Identifiers

Cite

Raghavan Thiagarajan, Alka Bhat, Guillaume Salbreux, Mandar M Inamdar, Daniel Riveline. Pulsations and flows in tissues as two collective dynamics with simple cellular rules. iScience, 2022, 25 (10), pp.105053. ⟨10.1016/j.isci.2022.105053⟩. ⟨hal-03834486⟩
0 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More