Transplantation of three‐dimensional artificial human vascular tissues fabricated using an extracellular matrix nanofilm‐based cell‐accumulation technique

We have established a novel three‐dimensional (3D) tissue‐constructing technique, referred to as the ‘cell‐accumulation method’, which is based on the self‐assembly of cultured human cells. In this technique, cells are coated with fibronectin and gelatin to construct extracellular matrix (ECM) nanof...

Full description

Saved in:
Bibliographic Details
Published in:Journal of tissue engineering and regenerative medicine 2017-04, Vol.11 (4), p.1303-1307
Main Authors: Asano, Yoshiya, Shimoda, Hiroshi, Okano, Daisuke, Matsusaki, Michiya, Akashi, Mitsuru
Format: Article
Language:English
Subjects:
Animals
Artificial Organs
blood vessels
Blood Vessels - transplantation
Blood Vessels - ultrastructure
cell‐accumulation technique
electron microscopy
Extracellular Matrix - metabolism
extracellular matrix nanofilm
human vascular tissue
Humans
Mice
Nanoparticles - chemistry
Regenerative medicine
Tissue engineering
Tissue Engineering - methods
transplantation
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have established a novel three‐dimensional (3D) tissue‐constructing technique, referred to as the ‘cell‐accumulation method’, which is based on the self‐assembly of cultured human cells. In this technique, cells are coated with fibronectin and gelatin to construct extracellular matrix (ECM) nanofilms and cultured to form multi‐layers in vitro. By using this method, we have successfully fabricated artificial tissues with vascular networks constructed by co‐cultivation of human umbilical vein‐derived vascular endothelial cells between multi‐layers of normal human dermal fibroblasts. In this study, to assess these engineered vascular tissues as therapeutic implants, we transplanted the 3D human tissues with microvascular networks, fabricated based on the cell‐accumulation method, onto the back skin of nude mice. After the transplantation, we found vascular networks with perfusion of blood in the transplanted graft. At the boundary between host and implanted tissue, connectivity between murine and human vessels was found. Transmission electron microscopy of the implanted artificial vascular tubules demonstrated the ultrastructural features of blood capillaries. Moreover, maturation of the vascular tissues after transplantation was shown by the presence of pericyte‐like cells and abundant collagen fibrils in the ECM surrounding the vasculature. These results demonstrated that artificial human vascular tissues constructed by our method were engrafted and matured in animal skin. In addition, the implanted artificial human vascular networks were connected with the host circulatory system by anastomosis. This method is an attractive technique for engineering prevascularized artificial tissues for transplantation. Copyright © 2015 John Wiley & Sons, Ltd.
ISSN:1932-6254
1932-7005
DOI:10.1002/term.2108