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Spheroid formation and modulation of tenocyte-specific gene expression under simulated microgravity
Armin Kraus1, Ronald Luetzenberg1, Nauras Abuagela1
1Department of Plastic, Aesthetic and Hand Surgery, Otto-von-Guericke University, Magdeburg, Germany.
Muscles, Ligaments and Tendons Journal
|February 2, 2018
Summary
Simulated microgravity counteracts tenocyte senescence and phenotype loss in vitro. This approach supports scaffold-free 3D cell culturing for tendon tissue engineering.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Tissue Engineering
Background:
- Tenocyte-seeded scaffolds are promising for tendon tissue engineering.
- Conventional 2D cell culture leads to rapid tenocyte senescence and phenotype loss.
- Simulated microgravity may counteract tenocyte senescence and phenotype loss.
Purpose of the Study:
- To investigate the effect of simulated microgravity on tenocyte phenotype and extracellular matrix gene expression.
- To evaluate simulated microgravity as a model for scaffold-free 3D tenocyte culture.
Main Methods:
- Human tenocytes were cultured under simulated microgravity (0.003g) for 9 days using a Random Positioning Machine (RPM).
- Formation of 3D spheroids was observed, and gene expression of collagen 1 (Col1A1), collagen 3 (COL3A1), Tenascin C (TNC), Fibronectin (FN), vimentin, and scleraxis (SCX) was measured via real-time PCR.
- Conventional 2D culture served as the control group.
Main Results:
- Simulated microgravity promoted the formation of stable 3D tenocyte spheroids.
- Spheroids exhibited significantly higher gene expression of collagen 1 (Col1A1) and collagen 3 (COL3A1) compared to the 2D control group.
- Gene expression of the tenocyte marker scleraxis (SCX) was significantly increased in spheroids, while TNC and FN showed increased trends.
Conclusions:
- Simulated microgravity can counteract tenocyte senescence and phenotype loss in vitro.
- Scaffold-free 3D spheroid culture under simulated microgravity is a promising approach for tendon tissue engineering.
- This method offers a novel model for studying tenocyte behavior and developing regenerative therapies.
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