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Friction-limited cell motility in confluent monolayer tissue
Amalie Christensen1, Ann-Katrine Vrans West, Lena Wullkopf
1Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
Physical Biology
|June 26, 2018
Summary
Solid friction, not drag friction, accurately models cell speed in living tissues. This finding helps quantify tissue mechanics and understand cell movement dynamics.
Area of Science:
- Biophysics
- Cell Biology
- Tissue Engineering
Background:
- Mechanical forces regulate cell development, coordination, and collective motion.
- Understanding cell motility in confluent tissues is crucial for development and disease.
Purpose of the Study:
- To investigate the influence of substrate friction on cell motility in confluent living tissues using a continuum-scale model.
- To determine whether drag friction or solid friction better represents experimental cell speed data.
Main Methods:
- Development of a continuum-scale model incorporating substrate friction.
- Testing the model against experimental data from endothelial and cancer cells.
- Analysis of cell speed distribution to compare friction models.
Main Results:
- Solid friction provides a better fit to experimental cell speed distributions compared to drag friction.
- The model successfully captures cell motility in confluent living tissues.
- Quantification of physical tissue parameters, including the viscosity-to-friction ratio.
Conclusions:
- Solid friction is a more appropriate model for substrate friction affecting cell motility in confluent tissues.
- The developed model offers a tool for quantifying tissue biomechanical properties.
- This research enhances our understanding of the physical mechanisms governing collective cell migration.
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