Clinical Hepatocyte Transplantation: What Is Next?

Current Transplantation Reports - Tập 4 - Trang 280-289 - 2017
James E. Squires1, Kyle A. Soltys2, Patrick McKiernan1, Robert H. Squires1, Stephen C. Strom3, Ira J. Fox4, Alejandro Soto-Gutierrez5
1Department of Pediatric Gastroenterology and Hepatology, Children’s Hospital of Pittsburgh of UPMC, Pittsburgh, USA
2Thomas E. Starzl Transplant Institute, Children’s Hospital of Pittsburgh of UPMC, Pittsburgh, USA
3Department of Laboratory Medicine, Division of Pathology, Karolinska Institutet, Stockholm, Sweden
4Department of Surgery, Children’s Hospital of Pittsburgh of UPMC, and McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, USA
5Department of Pathology, University of Pittsburgh, Pittsburgh, USA

Tóm tắt

Significant recent scientific developments have occurred in the field of liver repopulation and regeneration. While techniques to facilitate liver repopulation with donor hepatocytes and different cell sources have been studied extensively in the laboratory, in recent years, clinical hepatocyte transplantation (HT) and liver repopulation trials have demonstrated new disease indications and also immunological challenges that will require the incorporation of a fresh look and new experimental approaches. Growth advantage and regenerative stimulus are necessary to allow donor hepatocytes to proliferate. Current research efforts focus on mechanisms of donor hepatocyte expansion in response to liver injury/preconditioning. Moreover, the latest clinical evidence shows that important obstacles to HT include optimizing engraftment and limited duration of effectiveness, with hepatocytes being lost to immunological rejection. We will discuss alternatives for cellular rejection monitoring, as well as new modalities to follow cellular graft function and near-to-clinical cell sources. HT partially corrects genetic disorders for a limited period of time and has been associated with reversal of acute liver failure. The main identified obstacles that remain to make HT a curative approach include improving engraftment rates, and methods for monitoring cellular graft function and rejection. This review aims to discuss current state of the art in clinical HT and provide insights into innovative approaches taken to overcome these obstacles.

Tài liệu tham khảo

Fisher RA, Bu D, Thompson M, Tisnado J, Prasad U, Sterling R, et al. Defining hepatocellular chimerism in a liver failure patient bridged with hepatocyte infusion. Transplantation. 2000;69:303–7.

Habibullah CM, Syed IH, Qamar A, Taher-Uz Z. Human fetal hepatocyte transplantation in patients with fulminant hepatic failure. Transplantation. 1994;58:951–2.

•• Soltys KA, Setoyama K, Tafaleng EN, Soto Gutierrez A, Fong J, Fukumitsu K, Nishikawa T, et al. Host conditioning and rejection monitoring in hepatocyte transplantation in humans. J Hepatol. 2017;66(5):987–1000. Hepatocyte transplantation can potentially be used to treat genetic liver disorders but its application in clinical practice has been impeded by inefficient hepatocyte engraftment and the inability to monitor rejection of transplanted liver cells. In this study, we first show in non-human primates that pretreatment of the host liver with radiation improves the engraftment of transplanted liver cells. We then used this knowledge in a series of clinical hepatocyte transplants in patients with genetic liver disorders to show that radiation pretreatment and rejection risk monitoring are safe and, if optimized, could improve engraftment and long-term survival of transplanted hepatocytes in patients.

Alexandre E, Cahn M, Abadie-Viollon C, Meyer N, Heyd B, Mantion G, et al. Influence of pre-, intra- and post-operative parameters of donor liver on the outcome of isolated human hepatocytes. Cell Tissue Bank. 2002;3:223–33.

•• Lee SM, Schelcher C, Laubender RP, Frose N, Thasler RM, Schiergens TS, et al. An algorithm that predicts the viability and the yield of human hepatocytes isolated from remnant liver pieces obtained from liver resections. PLoS One. 2014;9:e107567. Isolated human primary hepatocytes are an essential in vitro model for basic and clinical research. For successful application as a model, isolated hepatocytes need to have a good viability and be available in sufficient yield. This study identifies donor characteristics, intra-operative factors, tissue processing, and cell isolation parameters that affect the viability and yield of human hepatocytes. By developing an accessible algorithm, projected viability can be determined even before isolation of hepatocytes, so that donors that result in high viability and yield can be identified.

Pourcher G, El-Kehdy H, Kanso F, Groyer-Picard MT, Gaillard M, Trassard O, et al. Volumetric portal embolization: a new concept to improve liver regeneration and hepatocyte engraftment. Transplantation. 2016;100:344–54.

Hogen R, DiNorcia J, Dhanireddy K. Antibody-mediated rejection: what is the clinical relevance? Curr Opin Organ Transplant. 2017;22:97–104.

Tolosa L, Pareja E, Gomez-Lechon MJ. Clinical application of pluripotent stem cells: an alternative cell-based therapy for treating liver diseases? Transplantation. 2016;100:2548–57.

Scaggiante B, Pineschi A, Sustersich M, Andolina M, Agosti E, Romeo D. Successful therapy of Niemann-Pick disease by implantation of human amniotic membrane. Transplantation. 1987;44:59–61.