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Related Concept Videos

Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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Smooth Muscle Contraction01:25

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Smooth muscle contraction is a complex process vital for various bodily functions, from maintaining blood vessel tension to facilitating the movement of food through the digestive tract. Unlike striated muscles, smooth muscle contraction begins more slowly and lasts longer.
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Tension Response at Adherens Junctions

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Alterations in Muscle Tone lll01:11

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Related Experiment Video

Updated: Jun 9, 2026

Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer
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Acto-myosin based response to stiffness and rigidity sensing.

Jonathan Fouchard1, Démosthène Mitrossilis, Atef Asnacios

  • 1Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS & Université Paris-Diderot, Paris, France.

Cell Adhesion & Migration
|September 7, 2010
PubMed
Summary

Cells adapt their internal contractility to environmental stiffness, coordinating local force sensing with global cell mechanics. This mechanism explains how cells orient their movement and spreading based on substrate rigidity.

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Last Updated: Jun 9, 2026

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Published on: May 7, 2020

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Area of Science:

  • Cell biology
  • Biophysics
  • Mechanobiology

Background:

  • Cells perceive and react to the mechanical properties of their surroundings.
  • Adhesion complexes and their stretch-sensitive proteins are known mediators of rigidity sensing.
  • Local force sensitivity within adhesion complexes needs to be coordinated at the cellular level.

Purpose of the Study:

  • To investigate how local mechano-sensitivity is coordinated across the entire cell.
  • To understand the relationship between cell-scale contractility and environmental stiffness.
  • To propose a model for cell rigidity sensing involving acto-myosin cortical tension.

Main Methods:

  • Single-cell traction force microscopy was employed.
  • Measurements were conducted on substrates with varying stiffness (springs).
  • Analysis focused on cellular contractility parameters like force, speed, and power.

Main Results:

  • Cellular contractility (force, speed, mechanical power) was found to adapt to external substrate stiffness.
  • This adaptation correlated with the ATPase activity of non-muscle myosin II.
  • Results indicate a load-dependent response of the acto-myosin system.

Conclusions:

  • A model is proposed where local adhesion force sensitivity is regulated by global cell cortical tension.
  • Acto-myosin dependent cortical tension adaptation is key to rigidity sensing.
  • This coordinated sensing mechanism explains how cell spreading and migration are guided by environmental rigidity.