Abstract
Epithelial tissues of the developing embryos elongate by different mechanisms, such as neighbor exchange, cell elongation, and oriented cell division. Since autonomous tissue self-organization is influenced by external cues such as morphogen gradients or neighboring tissues, it is difficult to distinguish intrinsic from directed tissue behavior. The mesoscopic processes leading to the different mechanisms remain elusive. Here, we study the spontaneous elongation behavior of spreading circular epithelial colonies in vitro. By quantifying deformation kinematics at multiple scales, we report that global elongation happens primarily due to cell elongations, and its direction correlates with the anisotropy of the average cell elongation. By imposing an external time-periodic stretch, the axis of this global symmetry breaking can be modified and elongation occurs primarily due to orientated neighbor exchange. These different behaviors are confirmed using a vertex model for collective cell behavior, providing a framework for understanding autonomous tissue elongation and its origins.
Article and author information
Author details
Funding
Department of Biotechnology, Ministry of Science and Technology, India (BT/06/IYBA/2012)
- Mandar M Inamdar
Cancer Research UK (FC001317)
- Guillaume Salbreux
Medical Research Council (FC001317)
- Guillaume Salbreux
Wellcome Trust (FC001317)
- Guillaume Salbreux
Centre National de la Recherche Scientifique (ANR-10-LABX-0030-INRT)
- Guillaume Salbreux
- Daniel Riveline
Agence Nationale de la Recherche (ANR-10-IDEX-0002-02)
- Daniel Riveline
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Reviewing Editor
- Irene Giardina, Università Sapienza, Italy
Publication history
- Received: April 9, 2020
- Accepted: December 31, 2020
- Accepted Manuscript published: January 4, 2021 (version 1)
Copyright
© 2021, Comelles et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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