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Related Experiment Videos

Bladder regeneration with cell-seeded small intestinal submucosa.

Yuanyuan Zhang1, Bradley P Kropp, Hsueh-Kung Lin

  • 1Department of Urology, Oklahoma University Medical Center, Oklahoma City, Oklahoma 73190, USA. yuanyuan-zhang@ouhhc.edu

Tissue Engineering
|March 11, 2004
PubMed
Summary

Small intestinal submucosa (SIS) seeded with smooth muscle cells (SMCs) and urothelial cells (UCs) shows potential for regenerating bladder tissue. This study suggests seeded SIS grafts could be used for future bladder augmentation procedures.

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Area of Science:

  • Regenerative Medicine
  • Tissue Engineering
  • Urology

Background:

  • Smooth muscle cells (SMCs) and urothelial cells (UCs) are crucial for bladder function.
  • Small intestinal submucosa (SIS) is a biomaterial with regenerative potential.
  • Current bladder augmentation methods have limitations.

Purpose of the Study:

  • To evaluate the regenerative capacity of SMCs and UCs seeded on SIS in vivo.
  • To assess the potential of cell-seeded SIS for inducing organized bladder regeneration.
  • To provide a basis for using seeded SIS grafts in bladder augmentation.

Main Methods:

  • Human bladder SMCs and UCs were layered and co-cultured on SIS scaffolds.
  • Cell-seeded SIS grafts were implanted subcutaneously in a nude mouse model.

Related Experiment Videos

  • Grafts were analyzed at 4, 8, and 12 weeks for tissue regeneration and cell markers.

    • Main Results:

    • By 12 weeks, grafts showed layered urothelium and early smooth muscle formation.
    • Regenerated SMCs expressed alpha-smooth muscle actin; UCs expressed cytokeratin AE1/AE3.
    • Unseeded control grafts showed no organized bladder regeneration.

    Conclusions:

    • Cell-seeded SIS promotes organized bladder regeneration in vivo.
    • This approach holds promise for developing new bladder augmentation strategies.
    • Further research is warranted to explore seeded SIS grafts for clinical applications.