Saltar al contenido
Merck

Wound Healing Coordinates Actin Architectures to Regulate Mechanical Work.

Nature physics (2020-01-04)
Visar Ajeti, A Pasha Tabatabai, Andrew J Fleszar, Michael F Staddon, Daniel S Seara, Cristian Suarez, M Sulaiman Yousafzai, Dapeng Bi, David R Kovar, Shiladitya Banerjee, Michael P Murrell
RESUMEN

How cells with diverse morphologies and cytoskeletal architectures modulate their mechanical behaviors to drive robust collective motion within tissues is poorly understood. During wound repair within epithelial monolayers in vitro, cells coordinate the assembly of branched and bundled actin networks to regulate the total mechanical work produced by collective cell motion. Using traction force microscopy, we show that the balance of actin network architectures optimizes the wound closure rate and the magnitude of the mechanical work. These values are constrained by the effective power exerted by the monolayer, which is conserved and independent of actin architectures. Using a cell-based physical model, we show that the rate at which mechanical work is done by the monolayer is limited by the transformation between actin network architectures and differential regulation of cell-substrate friction. These results and our proposed mechanisms provide a robust physical model for how cells collectively coordinate their non-equilibrium behaviors to dynamically regulate tissue-scale mechanical output.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
Anti-Rabbit IgG - Atto 594 antibody produced in goat