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Related Experiment Video

Updated: Jul 3, 2026

Longitudinal Measurement of Extracellular Matrix Rigidity in 3D Tumor Models Using Particle-tracking Microrheology
11:11

Longitudinal Measurement of Extracellular Matrix Rigidity in 3D Tumor Models Using Particle-tracking Microrheology

Published on: June 10, 2014

Mapping local matrix remodeling induced by a migrating tumor cell using three-dimensional multiple-particle tracking.

Ryan J Bloom1, Jerry P George, Alfredo Celedon

  • 1Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA.

Biophysical Journal
|July 22, 2008
PubMed
Summary

Researchers developed a new 3D tracking assay to measure matrix deformation during cell migration. This method reveals how cells remodel their environment, with matrix release being asymmetric and linked to cell protrusion dynamics.

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Last Updated: Jul 3, 2026

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Area of Science:

  • Biophysics
  • Cell Biology
  • Biomaterials

Background:

  • Mesenchymal cell migration in 3D matrices involves significant matrix remodeling.
  • Current techniques cannot measure local, 3D, real-time matrix deformation during cell migration.

Purpose of the Study:

  • To develop and validate a novel assay for probing local, 3D, real-time collagen matrix deformation during tumor cell migration.
  • To investigate the patterns and mechanisms of matrix remodeling associated with cell movement.

Main Methods:

  • Developed a high-resolution 3D multiple-particle tracking assay to track matrix-embedded beads.
  • Investigated collagen I matrix deformation near fibrosarcoma cells.
  • Utilized inhibitors of matrix metalloproteinases and acto-myosin contractility (ROCK).

Main Results:

  • Migrating cells induce symmetric matrix deformation towards the cell and asymmetric matrix release (front and back).
  • Matrix deformation near the leading edge is elastic and reversible; near the trailing edge, it causes irreversible rupture.
  • Matrix remodeling correlates with cell protrusive activity, mediated by myosin II and Rac1.

Conclusions:

  • The new 3D tracking assay enables detailed analysis of local matrix remodeling during cell migration.
  • Matrix remodeling is an active, directional process influenced by cell contractility and proteolysis.
  • Understanding matrix remodeling is crucial for comprehending cell migration in complex environments.