Assessing the functional properties of tenogenic primed mesenchymal stem cells in ex vivo equine tendon and ligament explants: A preliminary study.
Authors: Eva Depuydt, K. Chiers, L. V. Van Hecke, Jimmy Saunders, A. Martens, F. Pille, J. Spaas
Journal: Stem cell research
Summary
# Editorial Summary Tendon and ligament injuries remain a significant clinical challenge in equine practice, often resulting in permanent lameness and early retirement. Researchers in this 2022 study investigated whether mesenchymal stem cells (MSCs) primed specifically for tenogenic differentiation could enhance repair when applied to damaged equine tissue, using ex vivo explants of the superficial digital flexor tendon and suspensory ligament as their model. Tenogenic primed MSCs (tpMSCs) demonstrated substantially superior tissue integration and healing properties compared to standard MSCs: they showed significantly higher collagen type I (COL I) expression and lower smooth muscle actin (SMA) expression both before and after application to explants, with tpMSCs achieving notably greater adherence to lesion sites and promoting a greater proportion of COL I-producing cells within the damaged tissue. These findings suggest that priming MSCs toward a tenogenic phenotype before transplantation may enhance their reparative capacity by promoting more robust collagen deposition and reducing fibrotic differentiation—a mechanism that could underpin improved functional outcomes in clinical applications. For practitioners considering cellular therapy, this work provides preliminary evidence that cell preparation methodology significantly influences therapeutic efficacy, though further in vivo validation will be necessary before recommending this approach as standard treatment for performance horses.
Read the full abstract on PubMed
Practical Takeaways
- •Priming mesenchymal stem cells toward a tenogenic phenotype (tpMSCs) appears to enhance their ability to adhere to injured tendon and ligament tissue and promote collagen deposition, suggesting improved regenerative potential compared to unprimed cells
- •This ex vivo evidence supports the biological mechanism by which primed stem cell treatments may restore function to tendon and ligament injuries, though clinical efficacy in live horses still requires further investigation
- •Cell therapy protocols should consider pre-treatment priming strategies to optimize tenogenic differentiation and tissue integration before clinical application
Key Findings
- •Tenogenic primed MSCs (tpMSCs) expressed significantly higher collagen type I and lower smooth muscle actin compared to native MSCs
- •tpMSCs demonstrated significantly greater adherence to both tendon and ligament explants than native MSCs
- •Lesions treated with tpMSCs showed significantly higher percentage of collagen type I positive cells and lower percentage of smooth muscle actin positive cells