Tissue engineering of a hybrid bypass graft for coronary and lower limb bypass surgery

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
S T RashidA M Seifalian

Abstract

Tissue-engineered blood vessels have largely relied on inelastic scaffolds or biological solutions with uncertain long-term in vivo durability. In this report we present for the first time a hybrid tissue-engineered bypass graft consisting of an elastic scaffold of compliant poly(carbonate-urea)urethane (CPU), incorporated with human smooth muscle cells (SMCs) and endothelial cells (ECs) from the same human source. Human vascular SMCs and ECs were extracted from umbilical cord vessels. The effect of shear stress preconditioning on cell retention on the hybrid bypass graft was investigated under pulsatile arterial flow conditions. Retention of ECs seeded onto CPU precoated with SMCs was significantly improved by a period of shear stress preconditioning, especially when the stress incrementally increased. This is probably because the mechanical stimuli orient cells and increase the release of matrix proteins and attachment factors. The stage is now set for developing a hybrid graft for in vivo studies.

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Citations

Jun 15, 2011·Chemical Reviews·Achala de MelAlexander M Seifalian
Oct 21, 2011·Tissue Engineering. Part a·Jason W BjorkRobert T Tranquillo
Feb 23, 2012·Cardiovascular Research·Tatyana Merkulova-RainonBernard I Lévy
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Mar 31, 2011·Biotechnology and Applied Biochemistry·Mo BaguneidAlexander M Seifalian
Jul 10, 2020·Future Cardiology·Ali PooriaAlireza Gheini

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