Microvesicles isolated from 5-azacytidine-and-resveratrol-treated mesenchymal stem cells for the treatment of suspensory ligament injury in horse—a case report
Authors: Kornicka-Garbowska Katarzyna, Pędziwiatr Rafał, Woźniak Paulina, Kucharczyk Katarzyna, Marycz Krzysztof
Journal: Stem Cell Research & Therapy
Summary
# Editorial Summary Suspensory ligament injuries remain a significant challenge in equine athletes, with conventional rehabilitation and pharmacotherapy frequently failing to restore pre-injury performance levels. Researchers treated a 6-year-old jumping gelding's ultrasonographically-confirmed suspensory ligament lesion with extracellular microvesicles (MVsAZA/RES) derived from adipose-derived stem cells pre-conditioned with 5-azacytidine and resveratrol—a novel approach designed to harness the therapeutic benefits of stem cell secretions without using the cells themselves. In vitro testing demonstrated that MVsAZA/RES significantly enhanced cell proliferation and suppressed pro-apoptotic gene expression in metabolic syndrome-derived stem cells, whilst ultrasonographic follow-up in the treated horse showed improved lesion filling, enhanced angiogenesis, and restored elasticity within the injured ligament tissue. This case report suggests that microvesicle therapy may offer a practical alternative to whole stem cell treatments for suspensory ligament injuries, potentially reducing complications whilst maintaining regenerative efficacy; however, the findings are based on a single case, and controlled comparative trials would be necessary to establish microvesicle treatment as a standard therapeutic protocol in equine practice.
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Practical Takeaways
- •Microvesicles from specially treated stem cells may offer a simpler alternative to stem cell therapy for suspensory ligament injuries, potentially without the regulatory and safety challenges of live cell therapy
- •This single case suggests direct injection of microvesicles improved tissue healing markers (lesion filling, angiogenesis, elasticity) in a jumping horse with SL injury
- •Further clinical trials needed before recommending this treatment—currently only one horse treated, so clinical outcomes and return-to-work data are limited
Key Findings
- •Microvesicles from 5-azacytidine and resveratrol-treated adipose-derived stem cells enhanced proliferation and exerted anti-apoptotic effects in vitro on metabolic syndrome-derived ASCs
- •Direct injection of treated microvesicles into injured suspensory ligament resulted in increased lesion filling and improved angiogenesis
- •Treatment improved elasticity of injured tissue as measured by real-time elastography