Adhesion Functions in Cell Sorting by Mechanically Coupling the Cortices of Adhering Cells

Author:

Maître Jean-Léon1,Berthoumieux Hélène23,Krens Simon Frederik Gabriel1,Salbreux Guillaume2,Jülicher Frank2,Paluch Ewa4,Heisenberg Carl-Philipp1

Affiliation:

1. Institute of Science and Technology Austria, Klosterneuburg, Austria.

2. Max Planck Institute for the Physics of Complex Systems, Dresden, Germany.

3. CNRS, Laboratoire de Physique Théorique de la Matière Condensée, UMR 7600, Université Pierre et Marie Curie, Paris, France.

4. Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany and International Institute of Molecular and Cell Biology, Warsaw, Poland.

Abstract

Embryonic Cell Sorting and Movement Differential cell adhesion has long been thought to drive cell sorting. Maître et al. (p. 253 , published online 23 August) show that cell sorting in zebrafish gastrulation is triggered by differences in the ability of cells to modulate cortex tension at cell-cell contacts, thereby controlling contact expansion. Cell adhesion functions in this process by mechanically coupling the cortices of adhering cells at their contacts, allowing cortex tension to control contact expansion. In zebrafish epiboly the enveloping cell layer (EVL)—a surface epithelium formed at the animal pole of the gastrula—gradually spreads over the entire yolk cell to engulf it at the end of gastrulation. Behrndt et al. (p. 257 ) show that an actomyosin ring connected to the epithelial margin triggers EVL spreading both by contracting around its circumference and by generating a pulling force through resistance against retrograde actomyosin flow.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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