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A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
Published on: May 21, 2020
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Local stimulation of osteocytes using a magnetically actuated oscillating beam
Onaizah Onaizah1, Liangcheng Xu2, Kevin Middleton2
1Department of Mechanical and Industrial Engineering, University of Toronto, Ontario, Toronto, Canada.
Plos One
|June 30, 2020
Summary
Researchers developed a novel device for non-contact mechanical stimulation of bone cells (osteocytes). This platform precisely applies fluid shear stress, revealing how osteocyte networks signal in response to localized mechanical loading.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Mechanobiology
Background:
- Mechanical loading is crucial for bone health, influencing growth, repair, and disease treatment.
- Osteocytes act as mechanosensors, regulating bone structure in response to mechanical stimuli.
- Understanding osteocyte responses to localized mechanical stress requires specialized platforms.
Purpose of the Study:
- To develop a device for non-contact, localized mechanical stimulation of osteocytes.
- To investigate osteocyte responses to varying fluid shear stress levels.
- To analyze intracellular calcium signaling in osteocytes under controlled mechanical loading.
Main Methods:
- A magnetically actuated composite beam was designed to generate fluid shear stress.
- Finite element simulations quantified shear stress distribution.
- Osteocytes were cultured and stimulated, with intracellular calcium responses monitored and correlated to shear stress gradients.
Main Results:
- The device successfully applied localized fluid shear stress to osteocytes.
- Cells closer to the oscillating beam exhibited earlier calcium responses.
- The device demonstrated the ability to mimic signal propagation in osteocyte networks.
Conclusions:
- The developed device enables precise, localized mechanical stimulation of osteocytes.
- It provides a tool to study osteocyte network signaling dynamics.
- This technology facilitates research into mechanotransduction in bone tissue with physiological accuracy.
