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Matrix testing for urothelial tissue engineering.

L Wünsch1, E M Ehlers, M Russlies

  • 1Department of Pediatric Surgery, University of Lübeck, 23538 Lübeck, Germany. wuensch@medinf.mu-luebeck.de

European Journal of Pediatric Surgery : Official Journal of Austrian Association of Pediatric Surgery ... [Et Al] = Zeitschrift Fur Kinderchirurgie
|July 7, 2005
PubMed
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Biomaterials for bladder tissue engineering showed varied biological and mechanical properties in vitro. Biogenic matrices supported urothelial cell growth more closely resembling native bladder tissue.

Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Urology

Background:

  • Bladder reconstruction surgery presents significant complications, particularly in pediatric cases.
  • Tissue engineering offers a promising therapeutic strategy, with biomaterials being crucial for developing functional bladder substitutes.
  • Current research often focuses on single biomaterials, necessitating comparative studies.

Purpose of the Study:

  • To compare the biological and mechanical characteristics of various commercially available biomaterials seeded with urothelial cells in vitro.
  • To evaluate the suitability of different biomaterials for bladder tissue engineering applications.

Main Methods:

  • Commercially sourced biomaterials (Biogide, Ethisorb, Lyoplant, SIS, Vicryl, Xenoderm) of biologic and synthetic origins were used.

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  • Urothelial cells were seeded onto the biomaterials, and constructs were cultured.
  • Scanning electron microscopy assessed cell morphology and surface structure; mechanical testing measured force until failure (f_max).

    • Main Results:

    • Significant differences in cell adhesion and morphology were observed across the tested biomaterials.
    • Mechanical testing revealed a wide range of forces (f_max) from 0.02 N to 48.86 N for biomaterials, compared to 1.19 N for native bladder tissue.
    • Cells cultured on biogenic matrices exhibited morphology closer to native urothelium.

    Conclusions:

    • Biomaterials demonstrate distinct in vitro biological and mechanical properties crucial for tissue engineering.
    • Biogenic matrices provide a more native-like environment for urothelial cell growth compared to synthetic materials.
    • Most tested materials exhibited mechanical properties and force-displacement curves differing from native bladder tissue, highlighting the need for careful selection.