Tissue engineering in wound repair: the three "R"s--repair, replace, regenerate.
Authors: Theoret Christine
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Tissue Engineering Approaches to Equine Wound Repair Equine practitioners face significant challenges managing traumatic skin wounds, which are both costly and labour-intensive; whilst fetal skin possesses remarkable regenerative capacity, this ability diminishes substantially during late gestation as inflammatory and scarring processes predominate over true regeneration. Traditional autologous skin grafting—long considered the gold standard for substantial skin defects—is severely limited in horses by insufficient donor skin availability and problematic graft failure rates resulting from infection, inflammation, seroma formation, and shear forces. Theoret's 2009 review examines tissue engineering as a regenerative medicine approach, outlining how engineered constructs combining appropriate cell sources with biologically derived or synthetic polymer scaffolds could theoretically overcome these limitations by generating functionally complete skin with all layers, appendages, vascular integration, and nervous innervation whilst achieving scar-free healing. The fundamental advantage of tissue-engineered solutions lies in their potential to bypass the biological constraints that make conventional grafting unreliable in equine patients, though considerable developmental work remains to translate laboratory advances into clinically practical wound management tools. For practitioners managing catastrophic equine wounds, emerging tissue engineering strategies represent a promising avenue that could fundamentally reshape treatment outcomes when conventional approaches prove inadequate.
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Practical Takeaways
- •Traditional skin grafting in horses has significant limitations for large wounds due to limited donor sites and high complication rates—tissue engineering may offer future alternatives
- •Understanding that equine skin loses regenerative capacity as pregnancy progresses helps explain why wound healing becomes more fibrotic and scar-prone in adult horses
- •Emerging tissue engineering strategies combining appropriate cell sources with scaffolding materials could eventually provide better options for managing catastrophic wounds in practice
Key Findings
- •Equine skin has limited regenerative capacity compared to fetal skin due to inflammation and scarring during late gestation development
- •Autologous skin grafting in horses is limited by lack of redundant donor skin and high failure rates from infection, inflammation, and motion
- •Tissue engineering approaches using cells and polymeric scaffolds aim to regenerate complete functional skin with vascular and nervous integration without scarring