A Comparative Study of Engineered Dermal Templates for Skin Wound Repair in a Mouse Model

Ilia Banakh, Perdita Cheshire, Mostafizur Rahman, Irena Carmichael, Premlatha Jagadeesan, Neil R. Cameron, Heather Cleland, Shiva Akbarzadeh

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Engineered dermal templates have revolutionised the repair and reconstruction of skin defects. Their interaction with the wound microenvironment and linked molecular mediators of wound repair is still not clear. This study investigated the wound bed and acellular "off the shelf" dermal template interaction in a mouse model. Full-thickness wounds in nude mice were grafted with allogenic skin, and either collagen-based or fully synthetic dermal templates. Changes in the wound bed showed significantly higher vascularisation and fibroblast infiltration in synthetic grafts when compared to collagen-based grafts (P ≤ 0.05). Greater tissue growth was associated with higher prostaglandin-endoperoxide synthase 2 (Ptgs2) RNA and cyclooxygenase-2 (COX-2) protein levels in fully synthetic grafts. Collagen-based grafts had higher levels of collagen III and matrix metallopeptidase 2. To compare the capacity to form a double layer skin substitute, both templates were seeded with human fibroblasts and keratinocytes (so-called human skin equivalent or HSE). Mice were grafted with HSEs to test permanent wound closure with no further treatment required. We found the synthetic dermal template to have a significantly greater capacity to support human epidermal cells. In conclusion, the synthetic template showed advantages over the collagen-based template in a short-term mouse model of wound repair.

Original languageEnglish
Article number4508
Number of pages15
JournalInternational Journal of Molecular Sciences
Volume21
Issue number12
DOIs
Publication statusPublished - 25 Jun 2020

Keywords

  • COX-2
  • dermal templates
  • graft
  • human skin equivalent
  • inflammation
  • Integra®
  • NovoSorb® BTM
  • wound repair

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