Regenerative Potential of Human Umbilical Cord Vein for Urethral Reconstruction in Male Rabbit Model

Area of Science:

• Regenerative Medicine
• Urology
• Biomaterials Science

Background:

• Augmentation urethroplasty currently lacks ideal tissue-engineered materials.
• Amniotic tissue-derived materials show potential for urethral reconstruction.

Purpose of the Study:

• To provide proof of concept for using human umbilical cord vein (HUCV) as a scaffold for urethral reconstruction in a rabbit model.
• To evaluate the integration and regenerative capacity of HUCV xenografts in urethral defects.

Main Methods:

• Urethral defects were created in rabbits and reconstructed using either autograft (control) or HUCV xenograft (test).
• Endoscopy and biopsy were performed at 3 weeks post-surgery.
• Histopathological analysis of urethral and corpus cavernosum tissues was conducted at 6 weeks.

Main Results:

• All rabbits demonstrated favorable clinical and endoscopic outcomes, with no fistula or stenosis observed.
• Biopsy and final histological analyses revealed normal tissue histology in both groups, with minimal urothelial vacuolation and weak inflammatory infiltrate.
• HUCV xenografts showed successful integration and supported urethral regeneration.

Conclusions:

• Human umbilical cord vein serves as a viable scaffold for urethral regeneration.
• HUCV presents a potential alternative to existing tissue grafting procedures, potentially overcoming challenges with integration and immunological tolerance.
• Further research is warranted to explore the clinical applicability of HUCV in urethral reconstruction.