Xenogeneic acellular dermal matrix as a dermal substitute in rats

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing Research

Background:

• Acellular dermal matrix (ADM) is a dermal substitute for deep burn treatment.
• Cadaver skin availability for ADM production is limited, necessitating alternative sources.
• Porcine skin offers a potential xenogeneic source for ADM development.

Purpose of the Study:

• To evaluate the efficacy of porcine acellular dermal matrix (ADM) as a xenogeneic dermal substitute in a rat model.
• To compare the performance of xenogeneic ADM with allogeneic ADM and skin grafts alone.

Main Methods:

• Xenogeneic ADM was prepared from cryopreserved porcine skin using Dispase II and Triton X-100.
• Allogeneic ADM was prepared from rat skin.
• Full-thickness rat wounds were treated with xenogeneic ADM, allogeneic ADM, or split-thickness skin grafts alone, and assessed macro- and microscopically.

Main Results:

• Wounds treated with xenogeneic ADM exhibited significantly greater contraction compared to allogeneic ADM at 30 days.
• Graft take was poor with xenogeneic ADM at 14 days, while moderately good with allogeneic ADM.
• Thick autografts yielded the best healing; thin autografts caused contraction, which allogeneic ADM reduced, but xenogeneic ADM worsened healing.

Conclusions:

• Porcine ADM as a xenogeneic substitute resulted in poor graft take and increased wound contraction in rats.
• Allogeneic ADM demonstrated some benefit in reducing wound contraction.
• Xenogeneic ADM use in this model led to significantly worsened wound healing, highlighting challenges in xenograft application.