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Updated: Jun 9, 2026
25:12
Mechanical Stimulation of Stem Cells Using Cyclic Uniaxial Strain
Published on: July 29, 2007
Mechanical loading modulates intracellular calcium signaling in human mesenchymal stem cells
J J Campbell1, D L Bader, D A Lee
1Medical Engineering Division, School of Engineering and Materials Science, Queen Mary, University of London - UK.
Journal of Applied Biomaterials & Biomechanics : JABB
|August 27, 2010
Summary
Mesenchymal stem cells (MSCs) exhibit heterogeneous responses to mechanical strain. Some MSC populations increase calcium signaling, while others decrease it, impacting tissue engineering.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Tissue Engineering
Background:
- Mesenchymal stem cells (MSCs) are vital for connective tissue repair.
- Mechanical forces regulate tissue homeostasis via mechanotransduction.
- Calcium signaling is a key mediator in these mechanotransduction pathways.
Purpose of the Study:
- To investigate the effect of mechanical strain on intracellular calcium signaling in MSCs.
- To determine if MSCs exhibit varied responses to mechanical stimuli.
Main Methods:
- MSCs were embedded in alginate hydrogels.
- Confocal laser-scanning microscopy and a Ca2+ indicator (Fluo-4) were used.
- Static uniaxial compressive strain (20%) was applied for 20 minutes after an initial 20-minute unstrained period.
Main Results:
- A subset of MSCs showed spontaneous intracellular calcium signaling.
- Distinct MSC populations exhibited opposing changes in calcium transient frequency upon strain application (up-regulation and down-regulation).
- These observed differences were statistically significant (p<0.05).
Conclusions:
- MSC populations are heterogeneous in their response to mechanical strain.
- This heterogeneity in calcium signaling has implications for MSC-based cell therapies and tissue engineering strategies.
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