Two-layer tissue engineered urethra using oral epithelial and muscle derived cells.

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Urology

Background:

• Urethral reconstruction often faces challenges with graft failure and complications.
• Tissue engineering offers a promising alternative for creating functional urethral substitutes.
• Autologous cell sources minimize immunogenicity and rejection risks.

Purpose of the Study:

• To fabricate and evaluate the viability of novel two-layer tissue engineered urethras using autologously harvested oral cells in a canine model.
• To assess the efficacy of these engineered urethras in repairing surgically induced urethral defects.

Main Methods:

• Oral mucosal and muscle cells were harvested via punch biopsy and cultured into cell sheets.
• Two-layer tissue engineered urethras were constructed in vitro by joining epithelial and muscle cell sheets.
• Engineered urethras were autologously grafted into urethral defects in a canine model, with controls receiving no graft.

Main Results:

• Successful fabrication and transplantation of two-layer tissue engineered urethras were achieved.
• The experimental group exhibited a significantly higher 12-week complication-free rate compared to controls.
• Urethrogram and histological analysis confirmed urethral patency, stratified epithelialization, and well-differentiated submucosa in the experimental group.

Conclusions:

• Two-layer tissue engineered urethras can be successfully fabricated using cells from minimally invasive oral biopsies.
• This tissue engineering approach promotes functional urethral regeneration and may reduce complications associated with traditional reconstructive methods.