Abstract
Purpose of Review
The true potential of the field of transplant surgery remains limited due to shortages of available transplantable allografts and, following transplantation, acute and chronic rejection with need for lifelong immune suppression. An alternative approach is to bioengineer organs to be utilized in vivo, replacing diseased or malfunctioning human organs. This revolutionary step in medicine could have virtually unlimited therapeutic potential.
Recent Findings
Multiple strategies have been used to replicate functional transplantable organs without deleterious host immune response. Common approaches include the use of decellularized tissue scaffolds and of 3D bioprinting. Continuing challenges include engraftment and maturation of recipient cells, and long-term tissue viability and function.
Summary
We will review in brief the history of the field and the progress to date with multiple organ systems, highlighting our personal experience in lung regeneration. Finally, we will discuss the challenges that lie ahead to reach the dream of fully functional and transplantable bioengineered organs.
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Abbreviations
- TE:
-
Tissue Engineering
- RM:
-
Regenerative medicine
- TEM:
-
Transmission electron microscopy
- 3D:
-
Three Dimensional
- ECM:
-
Extracellular matrix
- HUVEC:
-
Human umbilical vein endothelial cells
- FLC:
-
Fetal lung cells
- MS1:
-
Murine endothelial cells
- NKC:
-
Neonatal kidney cells
- HBE:
-
Human Bronchial Epithelial cells
- hMSC:
-
Human bone-marrow-derived mesenchymal stromal cells
- HLF:
-
Human lung fibroblasts
- CBF:
-
Human vascular endothelial cells
- ESLD:
-
End-Stage Liver Disease
- iPSC:
-
Induced pluripotent stem cells
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Acknowledgments
The authors would like to thank Bryan Brown for his insight and collaboration with the Weiss lab. Further, we thank Franzi Uhl, Amy Coffey, Jacob Dearborn, and all members of the Weiss Lab who contributed to our prior research. We would like to acknowledge the giants who came before us in the field, and those who continue to push the field forward to this day. Finally, we would like to acknowledge our families, particularly Lia Nelson Wrenn, for their support. No writing assistance was utilized in the creation of this manuscript.
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Sean M. Wrenn declares that he has no conflict of interest. Daniel Weiss receives research funding from Athersys Inc. and from United Therapeutics Inc. In addition, Dr. Weiss has a patent Provisional Patent Application No. 61/810,966 pending, a patent Provisional Patent Application No. 62/147,943 pending, and a patent null pending.
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This article does not contain any studies with human or animal subjects performed by any of the authors.
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This article is part of the Topical collection on Tissue Engineering and Regenerative Medicine: Organogenesis.
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Wrenn, S.M., Weiss, D.J. Whole-Organ Tissue Engineering: No Longer Just a Dream. Curr Pathobiol Rep 4, 87–98 (2016). https://doi.org/10.1007/s40139-016-0110-x
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DOI: https://doi.org/10.1007/s40139-016-0110-x