Orientin Reverses Premature Senescence in Equine Adipose Stromal Cells Affected by Equine Metabolic Syndrome Through Oxidative Stress Modulation
Authors: Dominika Orzoł, M. Kępska, Magdalena Zyzak
Journal: International Journal of Molecular Sciences
Summary
# Editorial Summary Equine metabolic syndrome impairs the regenerative function of adipose-derived stem cells (ASCs) through oxidative stress and premature cellular ageing, limiting their therapeutic potential in regenerative medicine applications. Orzoł and colleagues investigated whether orientin, a plant-derived flavonoid antioxidant, could reverse this dysfunction by treating ASCs harvested from both healthy mares and those clinically diagnosed with EMS, then measuring proliferation rates (Ki67 expression), cell viability, apoptosis, oxidative stress markers, senescence indicators, clonogenicity, and migration capacity. Orientin treatment significantly enhanced proliferative activity and restored cell cycle distribution in both groups, with notably stronger improvements in EMS-derived cells, alongside reduced senescence, decreased apoptotic activity, and restored migratory and clonogenic potential. The compound's multi-target mechanism—simultaneously addressing oxidative stress, cellular senescence, and regenerative capacity—positions it as a candidate for supporting ASC-based therapies in metabolically compromised horses. For practitioners considering stem cell therapies in EMS-affected animals, these findings suggest that adjunctive antioxidant supplementation during cell isolation or pre-treatment protocols warrants further investigation as a means of optimising cell quality and therapeutic outcomes.
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Practical Takeaways
- •Orientin may represent a novel therapeutic approach for EMS by enhancing the regenerative capacity of stem cells compromised by metabolic dysfunction
- •This in vitro research provides early-stage evidence supporting further investigation into plant-derived flavonoids as adjunctive treatments for insulin dysregulation and tissue repair in metabolically affected horses
- •Results are preliminary; clinical trials would be needed to determine efficacy, dosing, and practical application in living horses with EMS
Key Findings
- •Orientin significantly increased Ki67 expression and improved cell cycle distribution in equine adipose stromal cells
- •Treatment restored clonogenic potential and migratory capacity, with more pronounced effects in EMS-derived cells
- •Orientin reduced cellular senescence and oxidative stress markers in metabolically impaired adipose stromal cells
- •The flavonoid improved overall cell viability and reduced apoptotic activity across both healthy and EMS-affected cell populations