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Concentric Gel System to Study the Biophysical Role of Matrix Microenvironment on 3D Cell Migration
Published on: April 3, 2015
Substrate stiffness regulates cadherin-dependent collective migration through myosin-II contractility
Mei Rosa Ng1, Achim Besser, Gaudenz Danuser
1Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.
The Journal of Cell Biology
|October 24, 2012
Summary
Substrate stiffness significantly enhances collective cell migration speed and coordination. This effect is mediated by cell contractility and cell-cell adhesion, highlighting the mechanical environment's role in tissue movement.
Area of Science:
- Cell Biology
- Biophysics
- Mechanobiology
Background:
- The mechanical microenvironment influences single-cell migration.
- The impact of mechanical cues on collective cell migration remains poorly understood.
Purpose of the Study:
- To investigate how substrate compliance affects collective cell migration in an epithelial wound-healing model.
- To elucidate the underlying mechanisms of mechanical cue transmission during collective cell movement.
Main Methods:
- Epithelial wound-healing assay with varying substrate stiffness.
- Dynamic analysis of cell movement coordination and polarity.
- Manipulation of myosin-II activity and cadherin-catenin complexes.
Main Results:
- Increased substrate stiffness enhanced collective cell migration speed, persistence, and directionality.
- Wounding initiated a wave of motion coordination, faster and farther on stiff substrates.
- Substrate stiffness modulated myosin-II activation gradients and cell polarity, mediated by cell-cell force coupling.
Conclusions:
- Substrate stiffness plays a critical role in regulating collective cell migration.
- Mechanical cues are transmitted through coupled contractile forces between cells.
- The mechanical environment integrates with cell contractility and adhesion to control collective cell movement.
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