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Preprints.org
By Banakh I, Rahman MM, Arellano CL and 6 others.
(1)
Meshed split skin grafting (SSG) still remains the gold-standard of care for deep wound treatment. The aim of this study was to evaluate an autologous bioengineered dermal–epidermal composite skin for treating full-thickness wounds in a porcine model using a clinically relevant two-stage grafting approach. (2)
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Multiple full thickness wounds were created on the dorsal sites of animals. Wounds were initially grafted with a polyurethane dermal template, followed three weeks later by either Platelet hydroGel–Pig Skin Equivalent (PG-PSE) or meshed SSG control. Human platelet lysate was also assessed as a substitute for foetal calf serum during skin maturation. (3)
By two weeks post grafting, epidermisation of PG-PSE–treated wounds was comparable to SSG-treated wounds. EdU labelling confirmed early engraftment and contribution of graft-derived cells to both neo-epidermis and neo-dermis. Immunofluorescence staining for vimentin+ fibroblasts and cytokeratin 5+ keratinocytes demonstrated formation of a neo-dermis and a hyperproliferative neo-epidermis enriched in progenitor keratinocytes, with rete ridge architecture indicative of dermal–epidermal maturation. Robust neovascularisation was observed in both papillary and reticular neo-dermis, with platelet lysate–matured grafts showing greater microvessel formation than foetal calf serum–matured grafts. Collagen deposition in PG-PSE grafts, particularly collagen I in the papillary neo-dermis, remained lower than in SSG-treated wounds, consistent with ongoing integration. However, collagen type I/type III composition in the reticular neo-dermis was largely comparable between PG-PSE and SSG, suggesting that bioengineered grafting does not alter dermal template maturation. (4)
Overall, autologous dermal–epidermal bioengineered skin effectively vascularises and repairs wounds over a dermal template. Platelet lysate is a promising alternative to foetal calf serum, although PG-PSE may require longer for complete dermal maturation and warrants further long-term evaluation.
This is a preprint: it has not been peer reviewed yet, and its findings may change.
Published in Preprints.org (preprint). The abstract is shown as published and remains the work of its authors; read the full article at the source.
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