[Biological vascularized matrix (BioVaM): a new method for solving the perfusion problems in tissue engineering]

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Urology

Background:

• Urinary bladder reconstruction presents significant challenges.
• Tissue engineered grafts offer a promising alternative to traditional methods.
• Maintaining vascularity in engineered tissues is crucial for graft survival.

Purpose of the Study:

• To present a novel technique for harvesting a vascularized acellular matrix from porcine small bowel.
• To describe the reseeding and resurfacing process for creating a functional tissue engineered graft.
• To evaluate early graft perfusion in a porcine model following implantation.

Main Methods:

• Harvesting an acellular matrix from porcine small bowel while preserving vascular pedicles.
• Reseeding the matrix with smooth muscle and urothelial cells.
• Resurfacing vascular structures with endothelial precursor cells to create a biological vascularized matrix (BioVaM).
• Implantation in a porcine model to assess early graft perfusion via vascular anastomosis.

Main Results:

• Successful harvesting of a vascularized acellular matrix.
• Creation of a functional tissue engineered graft (BioVaM) for bladder augmentation.
• Demonstration of promising early graft perfusion in short-term porcine implantation experiments.

Conclusions:

• The presented technique enables the creation of a vascularized tissue engineered graft for urinary bladder reconstruction.
• The biological vascularized matrix (BioVaM) shows potential for successful bladder augmentation.
• Early results suggest feasibility and promise for this innovative approach in regenerative medicine for urological applications.