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Quantitative Analysis of Cell Edge Dynamics during Cell Spreading
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Protrusive activity guides changes in cell-cell tension during epithelial cell scattering
Venkat Maruthamuthu1, Margaret L Gardel2
1Institute for Biophysical Dynamics, University of Chicago, Chicago, Illinois.
Biophysical Journal
|August 8, 2014
Summary
Epithelial cells scatter by breaking cell-cell contacts, even with E-cadherin present. Cell movement and force redistribution guide this rupture during scattering, crucial for understanding tissue development and metastasis.
Area of Science:
- Cell Biology
- Biophysics
- Developmental Biology
Background:
- Epithelial cell adhesions are vital for morphogenesis and metastasis.
- Epithelial cell scattering involves breaking cell-cell contacts despite E-cadherin presence.
- Mechanisms modulating cell-cell contact stability during scattering remain unclear.
Purpose of the Study:
- Investigate how epithelial cell-cell contact stability is modulated during scattering.
- Determine the role of cell motion and forces in cell-cell contact rupture.
- Explore biophysical changes during epithelial cell scattering.
Main Methods:
- Studied E-cadherin adhesions in epithelial cells with and without extracellular matrix (ECM).
- Examined cell behavior and forces upon hepatocyte growth factor (HGF) stimulation.
- Analyzed biophysical changes during scattering of cell pairs.
Main Results:
- E-cadherin adhesions sustain cell forces upon HGF stimulation, even without ECM.
- Focal adhesions and constraints prevent HGF-mediated contact rupture.
- Cell movement direction correlates with intercellular force changes and contact rupture direction.
Conclusions:
- Cell protrusive activity and displacement drive force redistribution, guiding cell-cell contact rupture.
- Understanding these biophysical mechanisms is key to morphogenesis and metastasis research.
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