Transplantation of bioengineered liver capable of extended function in a preclinical liver failure model

Am J Transplant. 2022 Mar;22(3):731-744. doi: 10.1111/ajt.16928. Epub 2022 Jan 5.


Unlimited organ availability would represent a paradigm shift in transplantation. Long-term in vivo engraftment and function of scaled-up bioengineered liver grafts have not been previously reported. In this study, we describe a human-scale transplantable liver graft engineered on a porcine liver-derived scaffold. We repopulated the scaffold parenchyma with primary hepatocytes and the vascular system with endothelial cells. For in vivo functional testing, we performed auxiliary transplantation of the repopulated scaffold in pigs with induced liver failure. It was observed that the auxiliary bioengineered liver graft improved liver function for 28 days and exhibited upregulation of liver-specific genes. This study is the first of its kind to present 28 days of posttransplant evaluation of a bioengineered liver graft using a preclinical large animal model. Furthermore, it provides definitive evidence for the feasibility of engineering human-scale transplantable liver grafts for clinical applications.

Keywords: artificial organs/support devices; bioengineering; liver transplantation/hepatology; regenerative medicine; tissue/organ engineering; translational research/science.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Endothelial Cells
  • Hepatocytes / transplantation
  • Liver / blood supply
  • Liver Failure*
  • Liver Transplantation*
  • Swine
  • Tissue Engineering
  • Tissue Scaffolds