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Tissue-engineered semi-microporous segmented polyetherurethane vascular prostheses.

Eun Hee Cho1, Young Il Yang, Chi-Woong Mun

  • 1Department of Biomedical Engineering, Inje University, Gimhae 621-749, South Korea.

Journal of Biomaterials Science. Polymer Edition
|July 21, 2005
PubMed
Summary
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Semi-microporous segmented polyetherurethane (SPEU) prostheses show improved endothelial cell attachment and proliferation compared to non-porous controls. Collagen coating further enhances cell retention and reduces platelet adhesion, indicating superior biocompatibility for vascular applications.

Area of Science:

  • Biomaterials Science
  • Vascular Biology
  • Medical Device Engineering

Background:

  • Endothelial cell coverage is crucial for vascular prosthesis biocompatibility.
  • Semi-microporous segmented polyetherurethane (SPEU) is a potential material for vascular grafts.
  • Optimizing SPEU surface properties can enhance its performance in vivo.

Purpose of the Study:

  • To evaluate the biocompatibility of semi-microporous segmented polyetherurethane (SPEU) with and without collagen coating.
  • To compare the endothelial cell attachment, proliferation, and retention on different SPEU surfaces.
  • To assess the anti-coagulant properties of SPEU surfaces under simulated blood flow.

Main Methods:

  • Three types of prostheses were tested: non-porous control, non-collagen-coated SPEU (PNC), and collagen-coated SPEU (PC).

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  • Endothelial cell attachment, proliferation, and coverage were quantified.
  • Endothelial cell retention under simulated blood flow and platelet adhesion were measured.

    • Main Results:

    • SPEU prostheses (PNC and PC) demonstrated twice the endothelial cell attachment and proliferation compared to controls.
    • Collagen-coated SPEU (PC) showed 1.4-times greater endothelial cell adhesion than PNC.
    • PC prostheses exhibited better endothelial cell retention and reduced platelet adhesion under simulated blood flow compared to PNC.

    Conclusions:

    • Semi-microporous SPEU provides a superior surface for endothelial cell culture compared to non-porous SPEU.
    • Collagen coating on SPEU enhances endothelial cell attachment and improves anti-coagulant properties.
    • SPEU, particularly with collagen coating, shows promise for developing biocompatible vascular prostheses.