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Related Experiment Videos

Peeling model for cell detachment.

D Garrivier1, E Décavé, Y Bréchet

  • 1DRFMC/SI3M, UMR 5819 CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble cedex 9, France.

The European Physical Journal. E, Soft Matter
|March 11, 2004
PubMed
Summary
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Cell adhesion to substrates relies on non-covalent bonds. This study models how adhesive belt properties, influenced by anchor protein distribution, govern cell detachment force and velocity.

Area of Science:

  • Biophysics
  • Cell Biology
  • Materials Science

Background:

  • Cell adhesion to solid substrates is mediated by non-covalent chemical bonds.
  • Understanding cell detachment dynamics is crucial for various experimental and biological processes.
  • The extreme margin of the cell, or adhesive belt, plays a key role in cell-substrate interactions.

Purpose of the Study:

  • To develop a theoretical model explaining cell detachment phenomena observed in experiments.
  • To investigate the influence of static and dynamic properties of adhesive bridges on cell detachment.
  • To establish a unified theoretical framework for threshold force and peeling velocity during cell detachment.

Main Methods:

  • Introduction of a one-dimensional theoretical model for cell detachment.

Related Experiment Videos

  • Analysis of the non-homogeneous distribution of anchor proteins along the cell membrane.
  • Kinetic analysis of contact line motion to derive the relationship between speed and external force.

    • Main Results:

    • The threshold force for cell detachment is determined by the non-homogeneous distribution of anchor proteins.
    • The adhesive belt's resistance to motion increases with increasing external force.
    • A characteristic relationship between detachment speed and external force was derived, describing the non-equilibrium state of the adhesive belt.

    Conclusions:

    • The static and dynamic properties of adhesive bridges at the cell margin are critical for cell detachment phenomena.
    • The theoretical model provides insights into the relationship between anchor protein distribution and cell adhesion strength.
    • The findings can be applied to interpret experimental results from cell detachment studies, including hydrodynamic shear experiments with Dictyostelium discoideum, and single-cell observations.