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Updated: May 10, 2025

Single Cell Durotaxis Assay for Assessing Mechanical Control of Cellular Movement and Related Signaling Events
Published on: August 27, 2019
Frictiotaxis underlies focal adhesion-independent durotaxis
Adam Shellard1, Kai Weißenbruch1, Peter A E Hampshire2,3
1Department of Cell and Developmental Biology, University College London, Gower Street, London, WC1E 6BT, UK.
Cells can move towards stiffer substrates without focal adhesions, a process newly termed frictiotaxis. This adhesion-independent durotaxis relies on friction, not just stiffness, offering new insights into cell migration.
Area of Science:
- Cell Biology
- Biophysics
- Mechanobiology
Background:
- Durotaxis, or directed cell migration along stiffness gradients, typically requires cell-substrate focal adhesions.
- The mechanism of durotaxis in the absence of focal adhesions has remained unclear.
Purpose of the Study:
- To investigate durotaxis in confined cells lacking focal adhesions.
- To elucidate the underlying mechanism of adhesion-independent durotaxis.
- To introduce and demonstrate a new concept of friction-driven cell migration.
Main Methods:
- Utilized confined cell migration assays.
- Investigated the role of myosin distribution and actomyosin retrograde flow.
- Developed a physical model for adhesion-independent durotaxis.
- Conducted experiments to demonstrate migration up friction gradients.
Main Results:
- Confined cells lacking focal adhesions exhibit durotaxis.
- Adhesion-independent durotaxis depends on asymmetric myosin distribution and actomyosin retrograde flow.
- Stiffer substrates provide higher friction, driving migration towards increased friction (frictiotaxis).
- Cells migrate up friction gradients even on uniform stiffness substrates.
Conclusions:
- Directed cell migration can occur independently of focal adhesions, driven by substrate friction.
- Frictiotaxis represents a novel mode of cell migration relevant to confined environments.
- Findings have implications for understanding cell migration in development, immunity, and cancer.
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