Tissue-engineered conduit using bladder acellular matrix and bladder epithelial cells for urinary diversion in...

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Urology

Background:

• Muscle invasive bladder cancer necessitates radical cystectomy and urinary diversion.
• Intestinal segments used for urinary diversion are prone to complications.
• Developing alternative materials for urinary diversion is crucial.

Purpose of the Study:

• To create a tissue-engineered conduit (TEC) for urinary diversion using rabbit bladder epithelial cells and bladder acellular matrix (BAM).
• To evaluate the efficacy and safety of the TEC in a rabbit model.

Main Methods:

• Rabbit bladder epithelial cells were cultured and seeded onto BAM to create a cell-seeded graft.
• The TEC was implanted in rabbits, connecting the bladder trigone to an abdominal stoma.
• Histological, immunohistochemical, and imaging studies (urography, pyelography, cystoscopy) were performed postoperatively.

Main Results:

• The experimental group (TEC with cells) showed successful epithelialization and patency of the conduit.
• Immunohistochemistry confirmed mature, functional epithelial cells lining the TEC lumen.
• The control group (unseeded BAM) experienced high mortality and severe complications like atresia and hydronephrosis.

Conclusions:

• A functional tissue-engineered conduit (TEC) was successfully created using BAM and bladder epithelial cells for urinary diversion in rabbits.
• The TEC demonstrated mature epithelial lining and prevented urinary extravasation, offering a promising alternative to intestinal segments.