Horse hair follicles: A novel dermal stem cell source for equine regenerative medicine
Authors: Michler Jule K., Hillmann Aline, Savkovic Vuk, Mülling Christoph K. W.
Journal: Cytometry Part A
Summary
# Editorial Summary Equine hair follicles harbour a readily accessible population of dermal stem cells that could meaningfully expand regenerative medicine options for horses, yet this resource remains largely unexplored in equine literature despite well-established characterisation in humans and other animal models. Michler and colleagues cultured skin explants from horse forelocks and isolated migratory cells from the follicular niche, characterising them through immunofluorescence and flow cytometry using panels targeting dermal lineage markers, undifferentiated cell status indicators, and established equine mesenchymal stromal cell (MSC) antigens. The isolated cells demonstrated typical fibroblast morphology with strong spheroid-forming capacity and expressed key markers consistent with dermal stem cells and multipotent MSCs, confirming convergence with characterisation criteria used across other species. These findings validate the hair follicle as a clinically viable adult stem cell source—one that requires only routine skin biopsy for harvest, offering significant advantages over bone marrow or adipose sampling in terms of accessibility and minimally invasive collection. For equine practitioners, this work establishes the biological foundation for future therapeutic applications using autologous follicle-derived stem cells in managing soft tissue injuries and degenerative conditions, though clinical efficacy and safety protocols remain to be established through translational research.
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Practical Takeaways
- •Hair follicle-derived stem cells offer a readily available, minimally invasive cell source for future regenerative therapies in horses compared to traditional bone marrow or fat sources
- •These cells exhibit standard MSC markers and differentiation potential, making them suitable candidates for developing regenerative treatments for soft tissue injuries
- •Further clinical research is needed to translate these in vitro findings into practical therapeutic protocols for common equine musculoskeletal conditions
Key Findings
- •Equine hair follicle cells can be successfully cultured from skin explants and display fibroblast morphology with spheroid formation tendency
- •Isolated cells express markers consistent with dermal and undifferentiated cell populations via immunofluorescence
- •Flow cytometry analysis confirmed expression of standard multipotent mesenchymal stromal cell (MSC) antigen markers in hair follicle-derived cells
- •Hair follicles represent an easily accessible adult stem cell source in horses with potential for regenerative medicine applications