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Updated: Mar 27, 2026
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Ex vivo Mechanical Loading of Tendon
Published on: May 28, 2007
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Humanoid Robotic Loading Enhances Mechanotransduction in Tendon Tissue Engineering
Zekun Liu1, Jinrong Lin1,2, Tania Choreno Machain1
1Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, University of Oxford, Oxford OX3 7LD, UK.
Cyborg and Bionic Systems (Washington, D.C.)
|March 26, 2026
Summary
This study introduces a robotic bioreactor that mimics human shoulder movements for tissue engineering. This multiaxial stimulation promotes better cell alignment and tenogenic adaptation in engineered tendons compared to traditional methods.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Biomechanical Engineering
Background:
- Mechanical stimulation is crucial for tissue maturation in tissue engineering.
- Existing uniaxial platforms cannot replicate in vivo multiaxial loading conditions.
Purpose of the Study:
- To develop and validate a humanoid robotic bioreactor for multiaxial mechanical stimulation of engineered tendon constructs.
- To investigate the effects of human-like shoulder motion on mesenchymal stem cells within tendon scaffolds.
Main Methods:
- Engineered tendon constructs with human mesenchymal stem cells on decellularized scaffolds were subjected to adduction-abduction loading using a robotic bioreactor.
- Real-time strain monitoring was performed using an integrated flexible sensor.
- Cellular morphology, gene expression, and protein expression were analyzed over 14 days.
Main Results:
- Multiaxial stimulation enhanced cell alignment and activated mechanotransduction pathways, including the PI3K-Akt signaling pathway.
- Dynamic loading led to mechanically driven phenotypic adaptation toward tenogenic programs.
- A moderate reduction in cell viability was observed, but transcriptional profiles indicated adaptation rather than cytotoxic damage.
Conclusions:
- Replicating human-like multiaxial mechanics in vitro alters cellular mechanosensing.
- This approach provides a mechanobiological foundation for developing more physiologically relevant tendon grafts.
