Are Stem Cells Safe to Use in Horse Eyes?

Researchers determined that administering subconjunctival allogeneic stem cell injections to horses appears safe.
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Veterinarians around the world have been researching stem cells’ effectiveness as therapeutic tools for a variety for equine musculoskeletal skeletal conditions with some success. A research team from Texas A&M recently took a closer look at the future of stem cell use in another important part of horses’ bodies: their eyes.

At the 2014 American Association of Equine Practitioners Convention, Ashlee Watts, DVM, PhD, Dipl. ACVS, presented the results of a study in which researchers evaluated allogeneic mesenchymal stem cells’ safety when injected into healthy horses’ subconjunctiva (the area beneath the mucous membrane lining the eyeball and inner eyelid surface). Watts is an assistant professor at the Texas A&M College of Veterinary Medicine & Biomedical Sciences.

Allogeneic stem cells are those harvested from one different horse and injected into another. Mesenchymal stem cells (or MSCs) are present in a variety of equine body tissues and are important to replenish dying cells and regenerate damaged tissue.

"Subconjunctival injection of allogeneic mesenchymal stem cells has the potential to become a new therapeutic in equine ophthalmology," Watts said. "Our objective was to evaluate the safety of allogenetic MSC subconjunctival injection in normal eyes

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Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

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