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Simple Polyacrylamide-based Multiwell Stiffness Assay for the Study of Stiffness-dependent Cell Responses
Published on: March 25, 2015
Substrate rigidity regulates the formation and maintenance of tissues
Wei-hui Guo1, Margo T Frey, Nancy A Burnham
1Department of Physiology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.
Biophysical Journal
|January 3, 2006
Summary
Substrate rigidity controls cell behavior. Stiff surfaces cause cells to spread and migrate apart, while soft surfaces promote tissue formation through cell compaction and inward migration.
Area of Science:
- Cell biology
- Tissue engineering
- Biophysics
Background:
- Cell adhesion and migration are fundamental to tissue formation.
- The triggers for cell-cell adhesion and tissue migration on culture surfaces remain unclear.
Purpose of the Study:
- To investigate the role of substrate rigidity in controlling cell adhesion, migration, and tissue formation.
- To elucidate the mechanisms underlying cell compaction and tissue assembly.
Main Methods:
- Utilizing substrates with identical chemical composition but varying flexibility.
- Observing cell behavior on substrates of different rigidities using fibroblastic, epithelial cell lines, and neonatal rat heart explants.
Main Results:
- Cells migrated apart and spread on stiff substrates.
- Cells compacted and formed tissue-like structures on soft substrates.
- Cell compaction involved weakened cell-substrate adhesion and myosin II-dependent contractile forces.
Conclusions:
- Substrate rigidity is a key regulator of cell migration and tissue formation.
- Differential mechanical signals between cell-cell and cell-substrate interactions dictate cell behavior.
- Contractile forces and adhesion dynamics determine cell migration direction and tissue association.
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