Cultured porcine epithelial grafts: an improved method

Area of Science:

• Regenerative Medicine
• Tissue Engineering
• Dermatology

Background:

• Developing methods for in vitro cultivation of porcine keratinocytes is crucial for advancing skin grafting techniques.
• Current methods may lack efficiency or speed in generating usable keratinocyte sheets for transplantation.
• Porcine models are valuable for studying skin regeneration due to physiological similarities with humans.

Purpose of the Study:

• To describe an improved method for rapid in vitro cultivation of porcine keratinocytes.
• To generate keratinocyte sheets suitable for grafting from porcine skin.
• To demonstrate the efficacy of these grafts in promoting epidermal regeneration.

Main Methods:

• Enzymatic separation of epidermis from dermis using Dispase solution.
• Cultivation of keratinocytes in supplemented Dulbecco-Vogt modified Eagle medium.
• Optimization of plating density and use of feeder layers (3T3-J2 cells) for extended passaging.
• Detachment and preparation of confluent stratified cultures for grafting.

Main Results:

• Rapid generation of epidermal sheets from porcine skin within hours.
• Demonstrated successful passaging of porcine keratinocytes up to seven times using feeder layers.
• Achieved epidermal regeneration following transplantation of generated grafts to full-thickness wounds in donor animals.

Conclusions:

• The described method provides an efficient way to produce porcine keratinocyte sheets for grafting.
• This technique holds potential for preclinical studies in wound healing and regenerative medicine.
• Successful regeneration highlights the viability of in vitro cultivated porcine epidermis for transplantation.