Horse hair follicles: A novel dermal stem cell source for equine regenerative medicine.

This research focuses on identifying horse hair follicles as a new source of dermal stem cells for use in equine regenerative medicine, demonstrating that these cells displayed typical dermal and undifferentiated cell characteristics.

Objective and Methodology

• The researchers aimed to explore and analyze cells from the dermal stem cell niche of the equine hair follicle both morphologically and for a subset of markers useful for cell characterization. This could potentially provide a convenient and reliable source of cells for regenerative treatments in horses.
• The experiment involved culturing equine forelock skin explants and hence obtaining cultures with cells migrating from the hair follicles.
• The cells that were isolated exhibited typical fibroblast morphology and showed a strong inclination to aggregate and form spheroids.

Immunofluorescent Characterization

• The researchers also employed an antibody panel to characterize primary isolations via immunofluorescent labelling. This panel consisted of lineage markers for the dermal compartment of the hair follicle, markers linked with an undifferentiated cell status, and markers for epithelial cell types as negative controls.
• All antibodies used were also tested on equine skin sections.
• The isolated cells displayed clear profiles of dermal and undifferentiated cells. This provides valuable insights into cellular capacity and identity, both key aspects in stem cell research and its application in regenerative medicine.

Flow Cytometry Experiments and Conclusion

• The researchers further substantiated their findings by testing primary isolations for established equine multipotent mesenchymal stromal cell antigen expression markers using flow cytometry experiments. These results showed a strong convergence, confirming their initial findings regarding the dermal and undifferentiated nature of the cells.
• The findings from this study lay important groundwork for future research into this easily accessible adult stem cell source. This could have far-reaching implications for the treatment of various conditions in horses, enriching the prospects of equine regenerative medicine.