Multilineage Differentiation Potential of Equine Adipose-Derived Stromal/Stem Cells from Different Sources.
Authors: Stage Hannah J, Trappe Susanne, Söllig Katharina, Trachsel Dagmar S, Kirsch Katharina, Zieger Cornelia, Merle Roswitha, Aschenbach Jörg R, Gehlen Heidrun
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary Multipotent stromal cells derived from adipose tissue hold considerable promise for regenerative medicine in equine practice, yet their therapeutic efficacy depends critically on understanding how isolation method and anatomical source affect their biological properties. Researchers isolated equine adipose-derived stromal cells (ASCs) from three anatomical sites—abdominal, retrobulbar and subcutaneous tissue—using two extraction techniques (collagenase digestion and explant culture), then characterised their proliferation rates and capacity to differentiate into cartilage, bone and fat across 21 days. Whilst proliferation and chondrogenic differentiation showed no meaningful variation between isolation methods or locations, abdominal ASCs derived via explant technique demonstrated superior adipogenic potential at day 7, and abdominal cells obtained through collagenase digestion showed greater osteogenic capacity by day 21; notably, neither isolation method succeeded in inducing cardiomyogenic differentiation despite targeted protocols. These findings suggest that tissue source and extraction technique should be carefully considered when selecting ASCs for specific clinical applications—abdominal explant-derived cells may be preferable for conditions requiring enhanced fat formation, whilst abdominal collagenase-derived cells might offer advantages for bone healing, though practitioners should be cautious about cardiomyogenic regeneration claims until further research develops more effective differentiation protocols.
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Practical Takeaways
- •Abdominal adipose tissue may be a preferred source for isolating equine ASCs with superior differentiation potential, particularly for applications targeting adipogenic or osteogenic repair
- •The choice between collagenase digestion and explant isolation techniques should consider timing and intended cell application, as differentiation profiles differ between methods and by harvest timepoint
- •Current protocols do not support cardiomyogenic differentiation of equine ASCs, limiting their application for cardiac regenerative medicine in horses
Key Findings
- •Equine adipose-derived stromal cells (ASCs) were successfully isolated from abdominal, retrobulbar, and subcutaneous adipose tissue using both collagenase digestion and explant techniques
- •Abdominal ASCs from explant technique showed highest adipogenic differentiation on day 7, while abdominal ASCs from SVF method showed higher adipogenic potential by day 14
- •Osteogenic differentiation potential was comparable at day 14 between isolation methods, but abdominal ASCs from explant technique demonstrated significantly higher osteogenic potential by day 21
- •Cardiomyogenic differentiation could not be achieved using activin A, bone morphogenetic protein-4, and Dickkopf-1 protocols