Tissue Engineering Graft for Urethral Reconstruction: Is It Ready for Clinical Application?

Area of Science:

• Regenerative Medicine
• Urology
• Biomaterials Science

Background:

• Urethral stricture treatment remains challenging, with unsatisfactory outcomes and complications, particularly for long strictures, revision cases, and penile strictures.
• Tissue engineering presents a promising alternative for urethral reconstruction, moving beyond traditional surgical methods.

Purpose of the Study:

• To review the current literature on tissue-engineered grafts for urethroplasty.
• To evaluate the efficacy and safety of various tissue-engineered graft materials and constructs.
• To identify gaps in current research and future directions for clinical application.

Main Methods:

• A PubMed database search was conducted for articles published between 1998 and 2022.
• Keywords focused on tissue-engineered grafts used in urethroplasty.
• Selected studies evaluated functional and anatomical outcomes, including complications.

Main Results:

• Numerous preclinical studies investigated diverse materials (e.g., acellular bladder matrix, small intestinal submucosa, dermal matrix, polyglycolic acid) with or without cells.
• Both acellular and cell-seeded matrices, as well as patch and tubularized constructs, have been explored in animal models.
• Tubularized scaffolds using co-cultured cells show promising preclinical results.

Conclusions:

• Tissue-engineered grafts are a potential solution for urethral reconstruction, but current preclinical findings require validation in robust clinical trials.
• High-quality evidence from randomized controlled studies with large sample sizes and long-term follow-up is essential.
• Further research is needed to translate these promising regenerative approaches into standard clinical practice for urethroplasty.