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Updated: Sep 8, 2025

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Traction-regulated persistence governs durotaxis across cell types.

Hongyuan Zhu1, Xiaoxi Liu1, Jin Wang1

  • 1The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China.

European Journal of Cell Biology
|September 5, 2025
PubMed
Summary

Cell migration direction depends on traction forces. High forces promote movement to stiffer environments, while low forces lead to migration towards softer areas, revealing a unified mechanism for durotaxis.

Keywords:
AdhesionDirectional PersistenceDurotaxisMechanical ModelTraction Force

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Area of Science:

  • Cellular mechanics and biophysics
  • Cancer biology and metastasis
  • Biomaterials science and tissue engineering

Background:

  • Cell migration along stiffness gradients (durotaxis) is crucial for development and cancer metastasis.
  • The precise mechanisms governing durotaxis and its universality across cell types remain incompletely understood.

Purpose of the Study:

  • To investigate the roles of cellular traction forces and directional persistence in dictating cell migration along stiffness gradients.
  • To elucidate a unified mechanism for durotaxis bias across different cell types and migration behaviors.

Main Methods:

  • Utilized tunable poly(ethylene glycol) (PEG) hydrogels with defined stiffness gradients (1-16 kPa).
  • Perturbed cellular contractility (using blebbistatin, oligomycin) and adhesion (using vinculin mutants) in cancer cells.
  • Developed and validated a computational model integrating traction forces and F-actin stability to predict durotaxis.

Main Results:

  • Cells with high traction forces exhibited persistent migration towards stiffer environments (positive durotaxis).
  • Cells with reduced traction forces lost persistence and migrated towards softer environments (negative durotaxis).
  • Computational model successfully linked stiffness-dependent traction to persistence, capturing both durotaxis behaviors with a single parameter set.

Conclusions:

  • Established a unified mechanism where traction-regulated persistence governs durotaxis bias, applicable across cell types.
  • Demonstrated that modulating myosin activity or adhesion reinforcement can switch durotaxis states.
  • Findings provide insights for designing biomaterials for directed cell migration and developing therapeutic strategies for tissue repair and cancer.