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Urethral reconstruction using bone marrow mesenchymal stem cell- and smooth muscle cell-seeded bladder acellular
1Department of Urology, Renmin Hospital of Wuhan University, Wuhan, and Jingmen No. 2 People's Hospital, Jingmen, Hubei, China.
Transplantation Proceedings
|November 5, 2013
Summary
A novel tissue-engineered sheet graft (TESG) using bone marrow mesenchymal stem cells (BMSCs) and smooth muscle cells (SMCs) seeded on bladder acellular matrix (BAM) shows promise for urethral reconstruction, avoiding complications seen with traditional methods.
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Urology
Background:
- Urethral defects necessitate surgical repair, but traditional methods carry risks like fistulae and strictures.
- Tissue engineering offers a promising alternative for reconstructive surgery.
Purpose of the Study:
- To construct and evaluate a tissue-engineered sheet graft (TESG) for urethral reconstruction.
- To assess the efficacy of a TESG composed of bone marrow mesenchymal stem cells (BMSCs) and smooth muscle cells (SMCs) seeded onto bladder acellular matrix (BAM).
Main Methods:
- BMSCs and SMCs were isolated, expanded, and seeded onto BAM to create the TESG.
- TESGs were implanted into rabbits for 2 weeks before urethral reconstruction.
- Histological analysis and retrograde urethrography were performed at various postoperative time points.
Main Results:
- TESG implants demonstrated multilayer urothelium, neovascularization, and organized smooth muscle bundles by 8-16 weeks.
- No severe shrinkage, diverticula, or strictures were observed in the TESG group.
- Control group rabbits (BAM-only) experienced significant urethral blockage and strictures, with some mortality.
Conclusions:
- A TESG utilizing BMSC- and SMC-seeded BAM is a viable option for urethral reconstruction.
- This approach effectively promotes tissue regeneration and avoids complications associated with traditional methods.
