Evaluation of Oxidative Stress and Mitophagy during Adipogenic Differentiation of Adipose-Derived Stem Cells Isolated from Equine Metabolic Syndrome (EMS) Horses
Authors: K. Marycz, C. Weiss, Agnieszka Śmieszek, K. Kornicka
Journal: Stem Cells International
Summary
# Editorial Summary Equine metabolic syndrome (EMS) represents a significant clinical challenge characterised by pathological obesity and insulin resistance, yet little is known about how this systemic disorder compromises the regenerative potential of adipose-derived stem cells (ASCs)—cells increasingly utilised in veterinary regenerative medicine for their immunomodulatory and multi-lineage differentiation capacity. Researchers isolated ASCs from EMS-affected horses and healthy controls, then tracked their behaviour during adipogenic (fat cell) differentiation using flow cytometry, quantitative PCR, immunofluorescence microscopy, and confocal imaging to assess oxidative stress, mitochondrial function, and autophagy. ASCs from EMS horses demonstrated markedly impaired differentiation capacity, primarily due to excessive reactive oxygen species (ROS) accumulation and endoplasmic reticulum stress that disrupted normal cellular function. Importantly, cells mounted a protective autophagic response—specifically mitophagy (selective removal of damaged mitochondria)—which partially compensated for metabolic dysfunction and maintained cellular homeostasis during differentiation. These findings have direct implications for practitioners considering stem cell therapies in metabolically compromised horses, suggesting that cell sourcing, pre-treatment protocols to reduce oxidative burden, or donor selection criteria warrant consideration to optimise therapeutic efficacy in EMS cases.
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Practical Takeaways
- •Stem cell therapies derived from EMS horses may have reduced effectiveness due to cellular dysfunction; consider metabolic status when selecting donor horses for MSC isolation
- •Oxidative stress and mitochondrial dysfunction in metabolically compromised horses could impact regenerative medicine outcomes; optimizing the metabolic health of donor animals may improve cell quality
- •Understanding that diseased stem cells activate compensatory autophagy mechanisms could inform strategies to enhance cell therapy efficacy, such as pre-treatment protocols to reduce cellular stress before clinical use
Key Findings
- •Adipose-derived stem cells from EMS horses showed impaired differentiation potential compared to healthy controls
- •Excessive reactive oxygen species (ROS) accumulation and endoplasmic reticulum stress were identified as major limiting factors for multipotency in EMS-derived cells
- •Autophagic flux was observed as a protective mechanism during adipogenic differentiation to remove dysfunctional mitochondria and maintain cellular homeostasis