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Updated: Jun 26, 2026
25:12
Mechanical Stimulation of Stem Cells Using Cyclic Uniaxial Strain
Published on: July 29, 2007
Human mesenchymal stem cells form multicellular structures in response to applied cyclic strain.
Adele M Doyle1, Robert M Nerem, Tabassum Ahsan
1Parker H. Petit Institute for Biomedical Engineering and Biosciences, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363, USA. adoyle@gatech.edu
Annals of Biomedical Engineering
|February 3, 2009
Summary
Mesenchymal stem cells (MSCs) rearrange into novel multicellular structures like clusters and knobs when exposed to cyclic strain. This response is rapid and occurs without altering key cellular proteins.
Area of Science:
- Biomaterials Science
- Cell Biology
- Regenerative Medicine
Background:
- Mesenchymal stem cells (MSCs) are crucial for cardiovascular regenerative therapies.
- Understanding MSCs' response to mechanical forces in cardiovascular tissues is limited.
Purpose of the Study:
- Establish a model to study MSC response to cyclic strain.
- Investigate the impact of cyclic equibiaxial strain on MSCs' cellular and cytoskeletal organization.
Main Methods:
- Applied 10%, 1 Hz cyclic equibiaxial strain to MSCs for 48 hours.
- Monitored MSC viability, gene/protein markers, and cellular/cytoskeletal organization.
- Assessed responses based on substrate coating and cell density.
Main Results:
- MSCs remained viable and retained key markers under strain.
- Novel multicellular structures (clusters and knobs) formed within 8 hours.
- Cellular rearrangements occurred without changes in cytoskeletal proteins.
- Responses depended on substrate coating but not cell density.
Conclusions:
- A reliable model system for studying MSC mechanoresponse was developed.
- Cyclic strain induces rapid cellular rearrangements and novel structure formation in MSCs.
- These findings are vital for optimizing cell-based cardiovascular regenerative therapies.
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