Implantation of amniotic membrane as a vascular substitute in the external jugular vein of juvenile sheep - PubMed (original) (raw)
. 2012 Oct;56(4):1098-104.
doi: 10.1016/j.jvs.2012.02.036. Epub 2012 May 5.
Affiliations
- PMID: 22560305
- DOI: 10.1016/j.jvs.2012.02.036
Free article
Implantation of amniotic membrane as a vascular substitute in the external jugular vein of juvenile sheep
Habibollah Peirovi et al. J Vasc Surg. 2012 Oct.
Free article
Abstract
Objective: Amniotic membrane, as a natural biomaterial, has many advantages, such as low immunogenicity, anti-inflammation, antifibrosis, and rich extracellular matrix components, which make it a promising source for vascular tissue engineering. This study assessed the feasibility of constructing a vein conduit from the amniotic membrane and implanting it in the external jugular vein of juvenile sheep.
Methods: Human amniotic membrane was prepared using fresh human placenta. For construction of a tube such as a vein, the membrane was rolled around a tube and amniotic membrane-constructed conduits were interposed to the external jugular vein by end-to-end anastomosis. Grafts were assessed for patency at weeks 5 and 48 and explanted for evaluation with histologic and microscopic techniques.
Results: At 5 weeks after implantation, the grafts were completely patent and displayed no signs of dilation. The internal surface was smooth and shiny, without any evidence of thrombus formation. After 48 weeks, grafts were still completely patent and displayed no signs of intimal thickening, dilation, or stenosis. No inflammation or fibrosis was evident. Histologic evaluation of the explanted grafts demonstrated a monolayer of endothelial cells. Scanning electron microscopy revealed a confluent layer of cells with normal endothelial cell morphology. A monolayer of cells positive for von Willebrand factor was detected in histology sections.
Conclusions: The findings of this study confirm that the amniotic membrane can be a proper substitute for vascular tissue engineering.
Copyright © 2012 Society for Vascular Surgery. Published by Mosby, Inc. All rights reserved.
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