Related Experiment Video
Updated: Mar 2, 2026
Surgical Model for Single-Staged Tissue-Engineered Urothelial Tubes in Minipigs
Published on: July 5, 2024
Future Prospects for Human Tissue Engineered Urethra Transplantation: Decellularization and Recellularization-Based
Abdol-Mohammad Kajbafzadeh1, Reza Abbasioun2, Shabnam Sabetkish2
1Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran. kajbafzd@sina.tums.ac.ir.
This study explored decellularized human urethral scaffolds transplanted in rats, observing natural tissue regeneration. Cell sheet engineering proved superior to perfusion for in vitro urethral reconstruction.
Area of Science:
- Urology
- Tissue Engineering
- Regenerative Medicine
Background:
- Urethral reconstruction often faces challenges with graft availability and integration.
- Decellularized extracellular matrix (ECM) offers a promising biomaterial scaffold for tissue regeneration.
Purpose of the Study:
- To assess histological characteristics of decellularized human urethral scaffolds in vivo.
- To compare in vitro urethral regeneration using perfusion-based versus cell sheet techniques.
Main Methods:
- Human urethras with corpus spongiosum were decellularized using a detergent-based method.
- Scaffolds were implanted into rat omentum for in vivo evaluation of recellularization over 6 months.
- Mesenchymal stem cells were used for in vitro regeneration via perfusion and cell sheet methods.
Main Results:
- Decellularization effectively removed cellular components while preserving ECM structure and biomechanical properties.
- In vivo studies showed progressive angiogenesis and infiltration of epithelium-like and smooth muscle cells.
- Cell sheet engineering demonstrated superior in vitro urethral regeneration compared to the perfusion-based technique.
Conclusions:
- Decellularized human urethral scaffolds support in vivo tissue regeneration, including vascularization and cellular infiltration.
- Cell sheet engineering is a preferred method for in vitro urethral regeneration using this scaffold.
- This research paves the way for potential clinical applications in urological reconstructive surgery.
