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Tissue engineering of vascular conduits.

K-H Yow1, J Ingram, S A Korossis

  • 1Institute of Medical and Biological Engineering, University of Leeds, Leeds General Infirmary, Leeds, UK. heng.yow@yahoo.co.uk

The British Journal of Surgery
|May 17, 2006
PubMed
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Vascular tissue engineering offers solutions for patients needing revascularization or dialysis access when autologous conduits are unavailable. Recent advances improve graft patency and reduce critical culture times for synthetic vascular grafts.

Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Vascular Surgery

Background:

  • Autologous conduits are insufficient for 40% of patients requiring revascularization or dialysis access.
  • Synthetic grafts exhibit poor patency rates in small-diameter applications.
  • Vascular tissue engineering presents a potential solution to these limitations.

Purpose of the Study:

  • To review the application of vascular tissue engineering in creating functional vascular grafts.
  • To highlight advancements addressing limitations of current synthetic and biological grafts.
  • To explore strategies for improving graft patency and reducing clinical timelines.

Main Methods:

  • Systematic literature review using Medline database.
  • Keywords included "vascular tissue engineering", "small diameter vascular conduit", "vascular cell biology", "biomechanics", "cell seeding", and "graft endothelialization".

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  • Hand-searching of key references for relevant studies.

    • Main Results:

    • Current in vitro and in vivo methods enable guided cell repopulation of scaffolds.
    • Extended culture times (approx. 6 weeks) have been a major clinical hurdle.
    • Recent advancements show promise for improved graft patency and reduced culture durations.

    Conclusions:

    • Vascular tissue engineering is advancing, offering improved patency rates for vascular prostheses.
    • Reduced culture times are being achieved through improved techniques and cell mobilization.
    • Endothelial progenitor cell mobilization may enhance autologous cell yield for scaffold reseeding.