Treatment of Equine Tarsus Long Medial Collateral Ligament Desmitis with Allogenic Synovial Membrane Mesenchymal Stem/Stromal Cells Enhanced by Umbilical Cord Mesenchymal Stem/Stromal Cell-Derived Conditioned Medium: Proof of Concept.
Authors: Leal Reis Inês, Lopes Bruna, Sousa Patrícia, Sousa Ana Catarina, Branquinho Mariana V, Caseiro Ana Rita, Rêma Alexandra, Briote Inês, Mendonça Carla M, Santos Jorge Miguel, Atayde Luís M, Alvites Rui D, Maurício Ana Colette
Journal: Animals : an open access journal from MDPI
Summary
Ligament injuries in sport horses, particularly desmitis of the tarsal region, present a persistent clinical challenge due to the formation of inferior fibrous scar tissue rather than regenerated ligament. Researchers treated a case of acute long medial collateral ligament desmitis using allogenic synovial membrane mesenchymal stem/stromal cells (eSM-MSCs) enhanced with conditioned medium derived from umbilical cord MSCs (eUC-MSCs)—a dual approach leveraging both the regenerative capacity of joint-native cells and the immunomodulatory secretome naturally evolved to tolerate maternal-fetal interaction. Ultrasonographic assessment demonstrated accelerated ligament recovery compared to expected healing timelines, with the horse returning to unrestricted competition following completion of a structured rehabilitation programme. The rationale underpinning this formulation is elegant: synovial membrane cells possess inherent aptitude for joint tissue regeneration, whilst umbilical cord-derived secretomes are naturally enriched in factors that suppress immune rejection, potentially creating an optimal microenvironment for ligamentous repair. Whilst this proof-of-concept case suggests therapeutic promise for resistant tarsal desmitis, practitioners should recognise this as preliminary evidence requiring larger-scale validation before adoption into routine regenerative protocols.
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Practical Takeaways
- •This novel MSC-based therapy shows promise for accelerating ligament healing in performance horses with desmitis, potentially reducing competition downtime
- •The combination of synovial membrane-derived cells with umbilical cord conditioned medium may offer advantages through both cellular and immunomodulatory mechanisms
- •While this is only a single case report, the approach warrants further investigation in controlled trials before clinical adoption can be recommended
Key Findings
- •Allogenic synovial membrane MSCs enhanced with umbilical cord MSC-derived conditioned medium promoted ultrasonographic ligament recovery in reduced timeframe
- •Treatment allowed sport horse return to unrestricted competition following physical rehabilitation program
- •Therapeutic formulation combined cellular components with immunomodulatory secretomes to promote tissue regeneration and suppress immune rejection