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Related Experiment Video

Updated: Jan 15, 2026

Engineering and Characterization of an Optogenetic Model of the Human Neuromuscular Junction

Engineering and Characterization of an Optogenetic Model of the Human Neuromuscular Junction

Published on: April 14, 2022

Modeling mechanochemical coupling in optogenetically activated cell layers.

Dennis Wörthmüller¹, Falko Ziebert², Ulrich S Schwarz²

¹Institut Curie, Universite PSL, Sorbonne Universite, CNRS UMR168, Physique des Cellules et Cancer, Paris, France.

Biophysical Journal

|October 9, 2025

Summary

This summary is machine-generated.

This study models cell communication using a finite element framework, revealing how biochemical signals and mechanical properties influence actomyosin contractility and signal propagation in adherent cells.

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Area of Science:

Cellular mechanics
Biophysics
Computational biology

Background:

Actomyosin contractility in adherent cells is primarily regulated by the RhoA signaling pathway.
Optogenetics offers a method to control this RhoA pathway.
Understanding mechanochemical coupling is crucial for modeling cell communication.

Purpose of the Study:

To develop a finite element framework for modeling mechanochemical coupling in adherent cells.
To analyze signal propagation and cell responses influenced by the RhoA pathway.
To systematically understand the interplay between biochemistry and mechanics in cell communication.

Main Methods:

A finite element framework utilizing the discontinuous Galerkin method.
Modeling adherent cell layers as actively contracting viscoelastic solids on an elastic foundation.
Employing different models for the Rho pathway, from linear chains to numerically solved feedback loops.

Main Results:

The model predicts signal propagation based on coupling strength and viscoelastic timescales.
Identified conditions for optimal cell responses and wave propagation.
Demonstrated the framework's ability to handle various cell configurations (doublets, chains, monolayers).

Conclusions:

The developed framework provides a unified approach to model different adherent cell arrangements.
Biochemical signaling (RhoA pathway) and mechanical properties (viscoelasticity) are key determinants of cell communication.
The study offers systematic insights into how cells coordinate responses through coupled biochemical and mechanical processes.