A tissue-specific scaffold for tissue engineering-based ureteral reconstruction.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Terminally differentiated somatic cells can alter phenotypes when cultured in vitro, posing challenges for tissue engineering.
• Maintaining cell phenotype is crucial for successful organ reconstruction using somatic cells.

Purpose of the Study:

• To evaluate a novel tissue-specific scaffold for maintaining urothelial cell (UC) phenotype in vitro.
• To assess the feasibility of using a blended scaffold for ureteral tissue engineering.

Main Methods:

• Fabricated a tissue-specific scaffold by blending poly (L-lactic acid) (PLLA) with ureteral extracellular matrix (UECM) using electrostatic spinning.
• Seeded primary urothelial cells (UCs) onto the scaffold and compared adhesion, proliferation, and phenotype expression with control scaffolds (pure PLLA and PLLA-small intestinal submucosa).

Main Results:

• UCs seeded on the tissue-specific scaffold demonstrated significantly enhanced proliferation compared to pure PLLA or PLLA-SIS scaffolds (p<0.05).
• Expression of the UC-specific marker Uroplakin III was significantly higher in the tissue-specific scaffold group (p<0.05).

Conclusions:

• The developed tissue-specific scaffold is an effective substrate for promoting urothelial cell survival and phenotype maintenance.
• This scaffold shows promise for advancing tissue engineering strategies in ureteral reconstruction.