1
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Lascaris B, Hoffmann RF, Nijsten MW, Porte RJ, de Meijer VE. Continuous Renal Replacement Therapy During Long-term Normothermic Machine Perfusion of Human Donor Livers for up to 7 D. Transplant Direct 2024; 10:e1568. [PMID: 38274473 PMCID: PMC10810577 DOI: 10.1097/txd.0000000000001568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 10/28/2023] [Indexed: 01/27/2024] Open
Abstract
Background Normothermic machine perfusion (NMP) is used to preserve and test donor livers before transplantation. During NMP, the liver is metabolically active and produces waste products, which are released into the perfusate. In this study, we describe our simplified and inexpensive setup that integrates continuous renal replacement therapy (CRRT) with NMP for up to 7 d. We also investigated if the ultrafiltrate could be used for monitoring perfusate concentrations of small molecules such as glucose and lactate. Methods Perfusate composition (urea, osmolarity, sodium, potassium, chloride, calcium, magnesium, phosphate, glucose, and lactate) was analyzed from 56 human NMP procedures without CRRT. Next, in 6 discarded human donor livers, CRRT was performed during NMP by integrating a small dialysis filter (0.2 m2) into the circuit to achieve continuous ultrafiltration combined with continuous fluid substitution for up to 7 d. Results Within a few hours of NMP without CRRT, a linear increase in osmolarity and concentrations of urea and phosphate to supraphysiological levels was observed. After integration of CRRT into the NMP circuit, the composition of the perfusate was corrected to physiological values within 12 h, and this homeostasis was maintained during NMP for up to 7 d. Glucose and lactate levels, as measured in the CRRT ultrafiltrate, were strongly correlated with perfusate levels (r = 0.997, P < 0.001 and r = 0.999, P < 0.001, respectively). Conclusions The integration of CRRT into the NMP system corrected the composition of the perfusate to near-physiological values, which could be maintained for up to 7 d. The ultrafiltrate can serve as an alternative to the perfusate to monitor concentrations of small molecules without potentially compromising sterility.
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Affiliation(s)
- Bianca Lascaris
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- UMCG Comprehensive Transplant Center, Groningen, The Netherlands
| | - Roland F. Hoffmann
- Department of Cardiothoracic Surgery, Section Extracorporeal Circulation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Maarten W.N. Nijsten
- Department of Critical Care, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Robert J. Porte
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Division of HPB and Transplant Surgery, Department of Surgery, Erasmus MC Transplant Institute, Rotterdam, The Netherlands
| | - Vincent E. de Meijer
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- UMCG Comprehensive Transplant Center, Groningen, The Netherlands
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2
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Kaffka Genaamd Dengler SE, Mishra M, Vervoorn MT, Kernkamp J, van Tuijl S, de Jager SCA, Sluijter JPG, Doevendans PA, van der Kaaij NP. Hemofiltration Improves Blood Perfusate Conditions Leading to Improved Ex Situ Heart Perfusion. ASAIO J 2024; 70:38-43. [PMID: 37816093 DOI: 10.1097/mat.0000000000002058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023] Open
Abstract
The aim was to optimize the perfusate composition by including a hemofiltrator to the PhysioHeartplatform for ex situ heart perfusion of porcine slaughterhouse hearts. Fourteen hearts were harvested from Dutch Landrace pigs and slaughtered for human consumption. All hearts were preserved for 4 hours using static cold storage before reperfusion for 4 hours on the PhysioHeart platform. Seven hearts were assigned to the hemofiltration group, where a hemofiltrator was added to the perfusion circuit, while the control group did not receive hemofiltration. In the hemofiltration group, the perfusion fluid was filtrated for 1 hour with a flow of 1 L/hour before reperfusion. After mounting the heart, hemofiltration was maintained at 1 L/hour, and cardiac function and blood samples were analyzed at multiple time points. Preserved cardiac function was defined as a cardiac output >3.0 L/min with a mean aortic pressure >60 mm Hg and a left atrial pressure <15 mm Hg. Hemofiltration resulted in a significantly reduced potassium concentration at all time points ( p < 0.001), while sodium levels remained at baseline values ( p < 0.004). Furthermore, creatinine and ammonia levels decreased over time. Functional assessment demonstrated a reduced left atrial pressure ( p < 0.04) and a reduction of the required dobutamine dose to support myocardial function ( p < 0.003) in the hemofiltration group. Preserved cardiac function did not differ between groups. Hemofiltration results in an improved biochemical composition of the whole blood perfusate and preserves cardiac function better during normothermic perfusion based on a reduced left atrial pressure (LAP) and dobutamine requirement to support function.
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Affiliation(s)
| | - Mudit Mishra
- From the Department of Cardiothoracic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
- Laboratory of Experimental Cardiology, Department of Cardiology, University Medical Center Utrecht, Regenerative Medicine Center Utrecht, Circulatory Health Research Center, University Utrecht, Utrecht, the Netherlands
| | - Mats T Vervoorn
- From the Department of Cardiothoracic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jord Kernkamp
- From the Department of Cardiothoracic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | | | - Saskia C A de Jager
- Laboratory of Experimental Cardiology, Department of Cardiology, University Medical Center Utrecht, Regenerative Medicine Center Utrecht, Circulatory Health Research Center, University Utrecht, Utrecht, the Netherlands
| | - Joost P G Sluijter
- Laboratory of Experimental Cardiology, Department of Cardiology, University Medical Center Utrecht, Regenerative Medicine Center Utrecht, Circulatory Health Research Center, University Utrecht, Utrecht, the Netherlands
| | - Pieter A Doevendans
- Department of Cardiology, University Medical Center Utrecht, University Utrecht, Utrecht, the Netherlands
- Netherlands Heart Institute, Utrecht, the Netherlands
| | - Niels P van der Kaaij
- From the Department of Cardiothoracic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
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3
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Nwaduru C, Baker E, Buff M, Selim M, Ovalle LA, Baker TB, Zimmerman MA. Assessing Liver Viability: Insights From Mitochondrial Bioenergetics in Ischemia-Reperfusion Injury. Transplant Proc 2024; 56:228-235. [PMID: 38171992 DOI: 10.1016/j.transproceed.2023.11.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 11/30/2023] [Indexed: 01/05/2024]
Abstract
Orthotopic liver transplantation remains the definitive treatment for patients with end-stage liver disease. Unfortunately, the increasing demand for donor livers and the limited supply of viable organs have both led to a critical need for innovative strategies to expand the pool of transplantable organs. The mitochondrion, central to hepatic cellular function, plays a pivotal role in hepatic ischemic injury, with impaired mitochondrial function and oxidative stress leading to cell death. Mitochondrial protection strategies have shown promise in mitigating IRI and resuscitating marginal organs for transplant. Machine perfusion (MP) has been proven a valuable tool for reviving marginal organs with very promising results. Evaluation of liver viability during perfusion traditionally relies on parameters including lactate clearance, bile production, and transaminase levels. Nevertheless, the quest for more comprehensive and universally applicable viability markers persists. Normothermic regional perfusion has gained robust attention, offering extended recovery time for organs from donation after cardiac death donors. This approach has shown remarkable success in improving organ quality and reducing ischemic injury using the body's physiological conditions. The current challenge lies in the absence of a reliable assessment tool for predicting graft viability and post-transplant outcomes. To address this, exploring insights from mitochondrial function in the context of ischemia-reperfusion injury could offer a promising path toward better patient outcomes and graft longevity. Indeed, hypoxia-induced mitochondrial injury may serve as a surrogate marker of organ viability following oxygenated resuscitation techniques in the future.
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Affiliation(s)
- Chinedu Nwaduru
- Department of Surgery, Division of Transplantation and Advanced Hepatobiliary Surgery, University of Utah School of Medicine, Salt Lake City, Utah.
| | - Emma Baker
- Department of Surgery, Division of Transplantation and Advanced Hepatobiliary Surgery, University of Utah School of Medicine, Salt Lake City, Utah
| | - Michelle Buff
- Department of Surgery, Division of Transplantation and Advanced Hepatobiliary Surgery, University of Utah School of Medicine, Salt Lake City, Utah
| | - Motaz Selim
- Department of Surgery, Division of Transplantation and Advanced Hepatobiliary Surgery, University of Utah School of Medicine, Salt Lake City, Utah
| | - Leo Aviles Ovalle
- Department of Surgery, Division of Transplantation and Advanced Hepatobiliary Surgery, University of Utah School of Medicine, Salt Lake City, Utah
| | - Talia B Baker
- Department of Surgery, Division of Transplantation and Advanced Hepatobiliary Surgery, University of Utah School of Medicine, Salt Lake City, Utah
| | - Michael A Zimmerman
- Department of Surgery, Division of Transplantation and Advanced Hepatobiliary Surgery, University of Utah School of Medicine, Salt Lake City, Utah
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4
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Li J, Lu H, Zhang J, Li Y, Zhao Q. Comprehensive Approach to Assessment of Liver Viability During Normothermic Machine Perfusion. J Clin Transl Hepatol 2023; 11:466-479. [PMID: 36643041 PMCID: PMC9817053 DOI: 10.14218/jcth.2022.00130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 06/14/2022] [Accepted: 08/10/2022] [Indexed: 01/18/2023] Open
Abstract
Liver transplantation is the most effective treatment of advanced liver disease, and the use of extended criteria donor organs has broadened the source of available livers. Although normothermic machine perfusion (NMP) has become a useful tool in liver transplantation, there are no consistent criteria that can be used to evaluate the viability of livers during NMP. This review summarizes the criteria, indicators, and methods used to evaluate liver viability during NMP. The shape, appearance, and hemodynamics of the liver can be analyzed at a macroscopic level, while markers of liver injury, indicators of liver and bile duct function, and other relevant indicators can be evaluated by biochemical analysis. The liver can also be assessed by tissue biopsy at the microscopic level. Novel methods for assessment of liver viability are introduced. The limitations of evaluating liver viability during NMP are discussed and suggestions for future clinical practice are provided.
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Affiliation(s)
| | | | | | | | - Qiang Zhao
- Correspondence to: Qiang Zhao, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China. ORCID: https://orcid.org/0000-0002-6369-1393. Tel: +86-15989196835, E-mail:
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5
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Roushansarai NS, Pascher A, Becker F. Innate Immune Cells during Machine Perfusion of Liver Grafts-The Janus Face of Hepatic Macrophages. J Clin Med 2022; 11:jcm11226669. [PMID: 36431146 PMCID: PMC9696117 DOI: 10.3390/jcm11226669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 11/13/2022] Open
Abstract
Machine perfusion is an emerging technology in the field of liver transplantation. While machine perfusion has now been implemented in clinical routine throughout transplant centers around the world, a debate has arisen regarding its concurrent effect on the complex hepatic immune system during perfusion. Currently, our understanding of the perfusion-elicited processes involving innate immune cells remains incomplete. Hepatic macrophages (Kupffer cells) represent a special subset of hepatic immune cells with a dual pro-inflammatory, as well as a pro-resolving and anti-inflammatory, role in the sequence of ischemia-reperfusion injury. The purpose of this review is to provide an overview of the current data regarding the immunomodulatory role of machine perfusion and to emphasize the importance of macrophages for hepatic ischemia-reperfusion injury.
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6
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Lascaris B, Thorne AM, Lisman T, Nijsten MWN, Porte RJ, de Meijer VE. Long-term normothermic machine preservation of human livers: what is needed to succeed? Am J Physiol Gastrointest Liver Physiol 2022; 322:G183-G200. [PMID: 34756122 DOI: 10.1152/ajpgi.00257.2021] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Although short-term machine perfusion (≤24 h) allows for resuscitation and viability assessment of high-risk donor livers, the donor organ shortage might be further remedied by long-term perfusion machines. Extended preservation of injured donor livers may allow reconditioning, repairing, and regeneration. This review summarizes the necessary requirements and challenges for long-term liver machine preservation, which requires integrating multiple core physiological functions to mimic the physiological environment inside the body. A pump simulates the heart in the perfusion system, including automatically controlled adjustment of flow and pressure settings. Oxygenation and ventilation are required to account for the absence of the lungs combined with continuous blood gas analysis. To avoid pressure necrosis and achieve heterogenic tissue perfusion during preservation, diaphragm movement should be simulated. An artificial kidney is required to remove waste products and control the perfusion solution's composition. The perfusate requires an oxygen carrier, but will also be challenged by coagulation and activation of the immune system. The role of the pancreas can be mimicked through closed-loop control of glucose concentrations by automatic injection of insulin or glucagon. Nutrients and bile salts, generally transported from the intestine to the liver, have to be supplemented when preserving livers long term. Especially for long-term perfusion, the container should allow maintenance of sterility. In summary, the main challenge to develop a long-term perfusion machine is to maintain the liver's homeostasis in a sterile, carefully controlled environment. Long-term machine preservation of human livers may allow organ regeneration and repair, thereby ultimately solving the shortage of donor livers.
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Affiliation(s)
- Bianca Lascaris
- Section of Hepatopancreatobiliary Surgery & Liver Transplantation, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Adam M Thorne
- Section of Hepatopancreatobiliary Surgery & Liver Transplantation, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Ton Lisman
- Surgical Research Laboratory, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Maarten W N Nijsten
- Department of Critical Care, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Robert J Porte
- Section of Hepatopancreatobiliary Surgery & Liver Transplantation, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Vincent E de Meijer
- Section of Hepatopancreatobiliary Surgery & Liver Transplantation, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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7
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Ahmed O, Xu M, Zhou F, Wein AN, Upadhya GA, Ye L, Wong BW, Lin Y, O'Farrelly C, Chapman WC. NRF2 assessment in discarded liver allografts: A role in allograft function and salvage. Am J Transplant 2022; 22:58-70. [PMID: 34379880 DOI: 10.1111/ajt.16789] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/23/2021] [Accepted: 07/19/2021] [Indexed: 01/25/2023]
Abstract
Antioxidant defence mechanisms, such as the nuclear factor-erythroid 2-related-factor-2 (NRF2) axis, are integral to oxidative stress responses and ischemic injury. Hepatic antioxidant capacity is contingent on parenchymal quality, and there is a need to develop new insights into key molecular mechanisms in marginal liver allografts that might provide therapeutic targets. This study examines the clinical relevance of NRF2 in donor livers and its response to normothermic machine perfusion (NMP). Discarded donor livers (n = 40) were stratified into a high NRF2 and low NRF2 group by quantifying NRF2 expression. High NRF2 livers had significantly lower transaminase levels, hepatic vascular inflammation and peri-portal CD3+ T cell infiltration. Human liver allografts (n = 8) were then exposed to 6-h of NMP and high NRF2 livers had significantly reduced liver enzyme alterations and improved lactate clearance. To investigate these findings further, we used a rat fatty-liver model, treating livers with an NRF2 agonist during NMP. Treated livers had increased NRF2 expression and reduced transaminase derangements following NMP compared to vehicle control. These results support the association of elevated NRF2 expression with improved liver function. Targeting this axis could have a rationale in future studies and NRF2 agonists may represent a supplemental treatment strategy for rescuing marginal donor livers.
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Affiliation(s)
- Ola Ahmed
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA.,School of Medicine, Trinity College Dublin, Dublin 2, Ireland
| | - Min Xu
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Fangyu Zhou
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Alexander N Wein
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Gundumi A Upadhya
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Li Ye
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Brian W Wong
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Yiing Lin
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Cliona O'Farrelly
- School of Medicine, Trinity College Dublin, Dublin 2, Ireland.,School of Biochemistry & Immunology, Trinity College Dublin, Dublin 2, Ireland
| | - William C Chapman
- Department of Surgery, Section of Abdominal Transplantation, Washington University School of Medicine, St. Louis, Missouri, USA
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8
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Improving Liver Graft Function Using CD47 Blockade in the Setting of Normothermic Machine Perfusion. Transplantation 2021; 106:37-47. [PMID: 33577253 DOI: 10.1097/tp.0000000000003688] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Towards the goal of utilizing more livers for transplantation, transplant centers are looking to increase the use of organs from "marginal" donors. Livers from these donors, however, have been shown to be more susceptible to preservation and reperfusion injury. METHODS Using a porcine model of donation after circulatory death (DCD), we studied the use of antibody-mediated CD47 blockade to further improve liver graft function undergoing normothermic machine perfusion. Livers from 20 pigs (5 per group) were brought under either 30 or 60 minutes of warm ischemia time (WIT) followed by the administration of CD47mAb treatment or IgG control antibodies and 6 hours of normothermic extracorporeal liver perfusion (NELP). RESULTS After 6 hours of NELP, CD47mAb-treated livers with 30 or 60 minutes WIT had significantly lower ALT levels and higher bile production compared to their respective control groups. Blockade of the CD47 signaling pathway resulted in significantly lower TSP-1 protein levels, lower expression of Caspase-3, and higher expression of pERK. CONCLUSIONS These findings suggested that CD47mAb treatment decreases ischemia/reperfusion injury through CD47/TSP-1 signaling downregulation and the presence of necrosis/apoptosis after reperfusion, and could increase liver regeneration during normothermic perfusion of the liver.Supplemental Visual Abstract; http://links.lww.com/TP/C146.
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9
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Zhang Z, Tang Y, Zhao Q, Wang L, Zhu C, Ju W, Wang D, Yang L, Wu L, Chen M, Huang S, Gao N, Zhu Z, Zhang Y, Sun C, Xiong W, Shen Y, Ma Y, Hu A, Zhu X, Rong J, Cai C, Guo Z, He X. Association of Perfusion Characteristics and Posttransplant Liver Function in Ischemia-Free Liver Transplantation. Liver Transpl 2020; 26:1441-1454. [PMID: 32542994 DOI: 10.1002/lt.25825] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 04/21/2020] [Accepted: 04/29/2020] [Indexed: 12/13/2022]
Abstract
It has been shown that normothermic machine perfusion (NMP), a novel preservation method, is able to assess and resuscitate liver grafts with risk factors. However, there is no consistent criteria for the assessment of liver grafts with NMP. Ischemia-free liver transplantation (IFLT) includes innovative surgical techniques and NMP, which can protect liver grafts from ischemia throughout organ procurement, preservation, and implantation. In our center, 28 human livers from donation after brain death donors were subjected to IFLT between July 2017 and October 2018. The correlation between posttransplant liver function tests with the perfusion parameters, blood gas analysis of perfusate, and bile biochemistry were analyzed. During the preservation phase, the vascular flow was stable, and the lactate level decreased rapidly. The transaminase release in the perfusate was low but stable, whereas the glucose level remained high. The perfusate lactate and aspartate aminotransferase (AST) levels at 1 hour of perfusion were correlated with the posttransplant peak AST level. There were negative correlations between the portal vein and hepatic artery flows at the end of perfusion and the peak transaminase levels within 7 days after transplantation. In conclusion, during IFLT, NMP is able to bridge the liver grafts from donors to recipients and can allow the assessment of liver function by perfusion characteristics.
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Affiliation(s)
- Zhiheng Zhang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Yunhua Tang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Qiang Zhao
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Linhe Wang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Caihui Zhu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Weiqiang Ju
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Dongping Wang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Lu Yang
- Department of Anesthesiology, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China
| | - Linwei Wu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Maogen Chen
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Shanzhou Huang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Ningxin Gao
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Zebin Zhu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Yixi Zhang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Chengjun Sun
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Wei Xiong
- Department of Anesthesiology, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China
| | - Yuekun Shen
- Department of Anesthesiology, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China
| | - Yi Ma
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Anbin Hu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Xiaofeng Zhu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Jian Rong
- Cardiopulmonary Bypass, and Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Changjie Cai
- Surgical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhiyong Guo
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Xiaoshun He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,6Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
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10
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Karangwa SA, Lisman T, Porte RJ. Anticoagulant Management and Synthesis of Hemostatic Proteins during Machine Preservation of Livers for Transplantation. Semin Thromb Hemost 2020; 46:743-750. [DOI: 10.1055/s-0040-1715452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
AbstractLiver transplantation remains the only curative treatment for patients with end-stage liver disease. Despite a steadily increasing demand for suitable donor livers, the current pool of donor organs fails to meet this demand. To resolve this discrepancy, livers traditionally considered to be of suboptimal quality and function are increasingly utilized. These marginal livers, however, are less tolerant to the current standard cold preservation of donor organs. Therefore, alternative preservation methods have been sought and are progressively applied into clinical practice. Ex situ machine perfusion is a promising alternative preservation modality particularly for suboptimal donor livers as it provides the ability to resuscitate, recondition, and test the viability of an organ prior to transplantation. This review addresses the modalities of machine perfusion currently being applied, and particularly focuses on the hemostatic management employed during machine perfusion. We discuss the anticoagulant agents used, the variation in dosage, and administration, as well as the implications of perfusion for extended periods of time in terms of coagulation activation associated with production of coagulation factors during perfusion. Furthermore, in regard to viability testing of an organ prior to transplantation, we discuss the possibilities and limitations of utilizing the synthesis of liver-derived coagulation factors as potential viability markers.
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Affiliation(s)
- Shanice A. Karangwa
- Department of Surgery, Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ton Lisman
- Department of Surgery, Surgical Research Laboratory, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Robert J. Porte
- Section of HPB Surgery and Liver Transplantation, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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Ishihara Y, Bochimoto H, Kondoh D, Obara H, Matsuno N. The ultrastructural characteristics of bile canaliculus in porcine liver donated after cardiac death and machine perfusion preservation. PLoS One 2020; 15:e0233917. [PMID: 32470051 PMCID: PMC7259665 DOI: 10.1371/journal.pone.0233917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 05/14/2020] [Indexed: 12/16/2022] Open
Abstract
The effects of each type of machine perfusion preservation (MP) of liver grafts donated after cardiac death on the bile canaliculi of hepatocytes remain unclear. We analyzed the intracellular three-dimensional ultrastructure of the bile canaliculi and hepatocyte endomembrane systems in porcine liver grafts after warm ischemia followed by successive MP with modified University of Wisconsin gluconate solution. Transmission and osmium-maceration scanning electron microscopy revealed that lumen volume of the bile canaliculi decreased after warm ischemia. In liver grafts preserved by hypothermic MP condition, bile canaliculi tended to recover in terms of lumen volume, while their microvilli regressed. In contrast, midthermic MP condition preserved the functional form of the microvilli of the bile canaliculi. Machine perfusion preservation potentially restored the bile canaliculus lumen and alleviated the cessation of cellular endocrine processes due to warm ischemia. In addition, midthermic MP condition prevented the retraction of the microvilli of bile canaliculi, suggesting further mitigation of the damage of the bile canaliculi.
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Affiliation(s)
- Yo Ishihara
- Department of Transplantation Technology and Therapeutic Development, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroki Bochimoto
- Department of Transplantation Technology and Therapeutic Development, Asahikawa Medical University, Asahikawa, Japan
- Division of Aerospace Medicine, Department of Cell Physiology, The Jikei University School of Medicine, Minato-ku, Japan
- * E-mail:
| | - Daisuke Kondoh
- Laboratory of Veterinary Anatomy, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
| | - Hiromichi Obara
- Department of Mechanical Engineering, Tokyo Metropolitan University, Hachioji, Japan
| | - Naoto Matsuno
- Department of Transplantation Technology and Therapeutic Development, Asahikawa Medical University, Asahikawa, Japan
- Department of Surgery, Asahikawa Medical University, Asahikawa, Japan
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Nösser M, Gassner JMGV, Moosburner S, Wyrwal D, Claussen F, Hillebrandt KH, Horner R, Tang P, Reutzel-Selke A, Polenz D, Arsenic R, Pratschke J, Sauer IM, Raschzok N. Development of a Rat Liver Machine Perfusion System for Normothermic and Subnormothermic Conditions. Tissue Eng Part A 2020; 26:57-65. [DOI: 10.1089/ten.tea.2019.0152] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Maximilian Nösser
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Joseph Maria George Vernon Gassner
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Simon Moosburner
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - David Wyrwal
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Felix Claussen
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Karl Herbert Hillebrandt
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Rosa Horner
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Peter Tang
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Anja Reutzel-Selke
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Dietrich Polenz
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Ruza Arsenic
- Department of Pathology, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Johann Pratschke
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Igor Maximilian Sauer
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Nathanael Raschzok
- Department of Surgery, Campus Charité Mitte
- Campus Virchow-Klinikum, Experimental Surgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- BIH Charité Clinician Scientist Program, Berlin Institute of Health (BIH), Berlin, Germany
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Bral M, Aboelnazar N, Hatami S, Thiesen A, Bigam DL, Freed DH, Shapiro AMJ. Clearance of transaminases during normothermic ex situ liver perfusion. PLoS One 2019; 14:e0215619. [PMID: 31017974 PMCID: PMC6481840 DOI: 10.1371/journal.pone.0215619] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/04/2019] [Indexed: 01/02/2023] Open
Abstract
Background One of the most promising applications of liver normothermic machine perfusion (NMP) is the potential to directly assess graft viability and injury. In most NMP studies, perfusate transaminases are utilized as markers of graft injury. Our aim was to further elucidate the metabolism of transaminases by healthy porcine livers during NMP, specifically whether such livers could clear circuit perfusate transaminases. Methods A highly concentrated transaminase solution was prepared from homogenized liver, with an aspartate aminotransferase (AST) level of 107,427 U/L. Three livers in the treatment group were compared to three controls, during 48 hours of NMP. In the treatment group, the circuit perfusate was injected with the transaminase solution to artificially raise the AST level to a target of 7,500 U/L. Perfusate samples were taken at two-hour intervals and analyzed for biochemistry until NMP end. Graft oxygen consumption and vascular parameters were monitored. Results Compared to controls, treated perfusions demonstrated abrupt elevations in transaminase levels (p>0.0001) and lactate dehydrogenase (LDH) (p>0.0001), which decreased over time, but never to control baseline. Liver function, as demonstrated by lactate clearance and oxygen consumption was not different between groups. The treatment group demonstrated a higher portal vein resistance (p = 0.0003), however hepatic artery resistance was similar. Treated livers had higher bile production overall (p<0.0001). Conclusions Addition of high levels of transaminases and LDH to a healthy porcine liver during ex situ perfusion results in progressive clearance of these enzymes, suggesting preserved liver metabolism. Such tolerance tests may provide valuable indicators of prospective graft function.
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Affiliation(s)
- Mariusz Bral
- Department of Surgery, University of Alberta, Edmonton, Canada
| | | | - Sanaz Hatami
- Department of Surgery, University of Alberta, Edmonton, Canada
| | - Aducio Thiesen
- Department of Pathology, University of Alberta, Edmonton, Canada
| | - David L. Bigam
- Department of Surgery, University of Alberta, Edmonton, Canada
| | - Darren H. Freed
- Department of Surgery, University of Alberta, Edmonton, Canada
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Tchilikidi KY. Liver graft preservation methods during cold ischemia phase and normothermic machine perfusion. World J Gastrointest Surg 2019; 11:126-142. [PMID: 31057698 PMCID: PMC6478595 DOI: 10.4240/wjgs.v11.i3.126] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/21/2019] [Accepted: 03/24/2019] [Indexed: 02/06/2023] Open
Abstract
The growing demand for donor organs requires measures to expand donor pool. Those include extended criteria donors, such as elderly people, steatotic livers, donation after cardiac death, etc. Static cold storage to reduce metabolic requirements developed by Collins in late 1960s is the mainstay and the golden standard for donated organ protection. Hypothermic machine perfusion provides dynamic organ preservation at 4°C with protracted infusion of metabolic substrates to the graft during the ex vivo period. It has been used instead of static cold storage or after it as short perfusion in transplant center. Normothermic machine perfusion (NMP) delivers oxygen, and nutrition at physiological temperature mimicking regular environment in order to support cellular function. This would minimize effects of ischemia/reperfusion injury. Potentially, NMP may help to estimate graft functionality before implantation into a recipient. Clinical studies demonstrated at least its non-inferiority or better outcomes vs static cold storage. Regular grafts donated after brain death could be safely preserved with convenient static cold storage. Except for prolonged ischemia time where hypothermic machine perfusion started in transplant center could be estimated to provide possible positive reconditioning effect. Use of hypothermic machine perfusion in regular donation instead of static cold storage or in extended criteria donors requires further investigation. Multicenter randomized clinical trial supposed to be completed in December 2021. Extended criteria donors need additional measures for graft storage and assessment until its implantation. NMP is actively evaluating promising method for this purpose. Future studies are necessary for precise estimation and confirmation to issue clinical practice recommendations.
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15
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Bral M, Gala-Lopez B, Thiesen A, Hatami S, Bigam DL, Freed DM, James Shapiro AM. Determination of Minimal Hemoglobin Level Necessary for Normothermic Porcine Ex Situ Liver Perfusion. Transplantation 2019; 102:1284-1292. [PMID: 29757899 DOI: 10.1097/tp.0000000000002272] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND In current studies of ex situ liver perfusion there exists considerable variability in perfusate composition, including the type of oxygen carrier. Herein, we aim to clarify the minimal hemoglobin level necessary during normothermic porcine ex situ liver perfusion. METHODS Livers procured from 35 to 45 kg domestic pigs were connected to our experimental ex situ circuit (n = 10). In the treatment group, perfusate was sequentially diluted hourly to predetermined hemoglobin levels. At the end of each hemoglobin dilution, perfusate samples were analyzed for liver transaminases, lactate dehydrogenase (LD), total bilirubin, and lactate levels. Liver oxygen consumption was measured. In the control group, livers were perfused continually for a duration of 24 hours at target hemoglobin levels of 30 and 20 g/L. RESULTS Rising liver transaminases, significantly higher lactate (P < 0.001), and LD levels (P < 0.001) were noted at lower perfusate hemoglobin levels in the treatment group. Liver oxygen utilization (P < 0.001) and hepatic artery oxygen delivery (P < 0.001) were significantly lower at lower hemoglobin levels, whereas liver vessel resistance remained relatively constant. Histology demonstrated increasing parenchymal damage at lower hemoglobin levels. In control livers, higher perfusate transaminases, higher lactate, and LD levels were noted at a perfusion hemoglobin level of 20 g/L. CONCLUSIONS Ex situ liver function decompensated during perfusion between a mean hemoglobin level of 30 to 20 g/L, as evidenced by notably rising lactate and LD levels. This study demonstrates optimal hemoglobin concentration during normothermic ex situ liver perfusion to ensure a fully metabolically functioning graft.
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Affiliation(s)
- Mariusz Bral
- Department of Surgery, University of Alberta, Edmonton, Canada.,Members of the Canadian National Transplant Research Project (CNTRP)
| | - Boris Gala-Lopez
- Department of Surgery, University of Alberta, Edmonton, Canada.,Members of the Canadian National Transplant Research Project (CNTRP)
| | - Aducio Thiesen
- Department of Surgery, University of Alberta, Edmonton, Canada
| | - Sanaz Hatami
- Department of Surgery, University of Alberta, Edmonton, Canada.,Members of the Canadian National Transplant Research Project (CNTRP)
| | - David L Bigam
- Department of Surgery, University of Alberta, Edmonton, Canada
| | - Darren M Freed
- Department of Surgery, University of Alberta, Edmonton, Canada.,Members of the Canadian National Transplant Research Project (CNTRP)
| | - A M James Shapiro
- Department of Surgery, University of Alberta, Edmonton, Canada.,Members of the Canadian National Transplant Research Project (CNTRP)
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16
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Porcine Isolated Liver Perfusion for the Study of Ischemia Reperfusion Injury: A Systematic Review. Transplantation 2019; 102:1039-1049. [PMID: 29509572 DOI: 10.1097/tp.0000000000002156] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Understanding ischemia reperfusion injury (IRI) is essential to further improve outcomes after liver transplantation (LT). Porcine isolated liver perfusion (ILP) is increasingly used to reproduce LT-associated IRI in a strictly controlled environment. However, whether ILP is a reliable substitute of LT was never validated. METHODS We systematically reviewed the current experimental setups for ILP and parameters of interest reflecting IRI. RESULTS Isolated liver perfusion was never compared with transplantation in animals. Considerable variability exists between setups, and comparative data are unavailable. Experience so far suggests that centrifugal pump(s) with continuous flow are preferred to reduce the risk of embolism. Hepatic outflow can be established by cannulation of the inferior vena cava or freely drained in an open bath. Whole blood at approximately 38°C, hematocrit of 20% or greater, and the presence of leukocytes to trigger inflammation is considered the optimal perfusate. A number of parameters related to the 4 liver compartments (hepatocyte, cholangiocyte, endothelium, immune cells) are available; however, their significance and relation to clinical outcomes is not well described. CONCLUSIONS Porcine ILP provides a reproducible model to study early IRI events. As all models, it has its limitations. A standardization of the setup would allow comparison of data and progress in the field.
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Comparison of BQ123, Epoprostenol, and Verapamil as Vasodilators During Normothermic Ex Vivo Liver Machine Perfusion. Transplantation 2018; 102:601-608. [PMID: 29189484 DOI: 10.1097/tp.0000000000002021] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND The optimal vasodilator to avoid hepatic artery vasospasm during normothermic ex vivo liver perfusion (NEVLP) is yet to be determined. We compared safety and efficacy of BQ123 (endothelin1 antagonist), epoprostenol (prostacyclin analogue), and verapamil (calcium channel antagonist). METHODS Livers from porcine heart beating donors were perfused for 3 hours and transplanted into recipient pigs. Four groups were compared: group 1, livers perfused with a dose of 1.25 mg of BQ123 at baseline and at 2 hours of perfusion; group 2, epoprostenol at a continuous infusion of 4 mg/h; group 3, verapamil 2.5 mg at baseline and at 2 hours of perfusion; group 4, no vasodilator used during ex vivo perfusion. Liver injury and function were assessed during perfusion, and daily posttransplantation until postoperative day (POD) 3. All groups were compared with a cold storage group for postoperative graft function. RESULTS Hepatic artery flow during NEVLP was significantly higher in BQ123 compared with verapamil, epoprostenol, and no vasodilator-treated livers. Aspartate aminotransferase levels were significantly lower with BQ123 and verapamil compared with epoprostenol and control group during perfusion. Peak aspartate aminotransferase levels were lower in pigs receiving BQ123 and verapamil perfused grafts compared with epoprostenol and control group. International Normalized Ratio, alkaline phosphatase, and total bilirubin levels were lower in the BQ123 and verapamil groups compared to epoprostenol group. Cold storage group had increased markers of ischemia reperfusion injury and slower graft function recovery compared to machine perfused grafts. CONCLUSION The use of BQ123, epoprostenol, and verapamil during NEVLP is safe. Livers perfused with BQ123 and verapamil have higher hepatic artery flow and reduced hepatocyte injury during perfusion compared with epoprostenol. Hepatic artery flow is significantly reduced in the absence of vasodilators during NEVLP.
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Eshmuminov D, Leoni F, Schneider MA, Becker D, Muller X, Onder C, Hefti M, Schuler MJ, Dutkowski P, Graf R, Rudolf von Rohr P, Clavien PA, Bautista Borrego L. Perfusion settings and additives in liver normothermic machine perfusion with red blood cells as oxygen carrier. A systematic review of human and porcine perfusion protocols. Transpl Int 2018; 31:956-969. [PMID: 29928775 DOI: 10.1111/tri.13306] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 06/10/2018] [Accepted: 06/18/2018] [Indexed: 12/30/2022]
Abstract
Liver machine perfusion (MP) at normothermic temperature (NMP) is a promising way to preserve and evaluate extended criteria donor livers. Currently, no consensus exists in methodology and perfusion protocols. Here, the authors performed a systematic literature search to identify human and porcine studies reporting on liver NMP with red blood cells. A qualitative synthesis was performed concerning technical aspects of MP, fluid composition, gas supply, and liver positioning. Thirty-seven publications including 11 human and 26 porcine studies were considered for qualitative synthesis. Control mode, pressure, flow, perfusate additives, and targeted blood gas parameters varied across human as well as porcine studies. For future analyses, it is advisable to report flow adjusted to liver weight and exact pressure parameters including mean, systolic, and diastolic pressure. Parenteral nutrition and insulin addition was common. Parenteral nutrition included amino acids and/or glucose without lipids. Taurocholic acid derivatives were used as bile flow promoters. However, short-term human NMP without taurocholic acid derivatives seems to be possible. This finding is relevant due to the lack of clinical grade bile salts. Near physiological oxygen tension in the perfusate is doable by adjusting gas flows, while blood gas parameters regulation needs more detailed description.
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Affiliation(s)
- Dilmurodjon Eshmuminov
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
| | - Filippo Leoni
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
| | - Marcel André Schneider
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
| | - Dustin Becker
- Wyss Zurich - ETH Zurich/University of Zurich, Zurich, Switzerland
| | - Xavier Muller
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
| | - Christopher Onder
- Institute for Dynamic Systems and Control, ETH Zurich, Zurich, Switzerland
| | - Max Hefti
- Wyss Zurich - ETH Zurich/University of Zurich, Zurich, Switzerland
| | - Martin J Schuler
- Wyss Zurich - ETH Zurich/University of Zurich, Zurich, Switzerland
| | - Philipp Dutkowski
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
| | - Rolf Graf
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
| | | | - Pierre-Alain Clavien
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
| | - Lucia Bautista Borrego
- Department of Surgery, Swiss HPB and Transplantation Center, University Hospital Zurich, Zurich, Switzerland
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Jayant K, Reccia I, Virdis F, Shapiro AMJ. The Role of Normothermic Perfusion in Liver Transplantation (TRaNsIT Study): A Systematic Review of Preliminary Studies. HPB SURGERY : A WORLD JOURNAL OF HEPATIC, PANCREATIC AND BILIARY SURGERY 2018; 2018:6360423. [PMID: 29887782 PMCID: PMC5985064 DOI: 10.1155/2018/6360423] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/18/2018] [Indexed: 12/17/2022]
Abstract
INTRODUCTION The success of liver transplantation has been limited by the unavailability of suitable donor livers. The current organ preservation technique, i.e., static cold storage (SCS), is not suitable for marginal organs. Alternatively, normothermic machine perfusion (NMP) promises to recreate the physiological environment and hence holds promise for the better organ preservation. The objective of this systematic review is to provide an overview of the safety, benefits, and insight into the other potential useful parameters of NMP in the liver preservation. MATERIAL AND METHODS We searched the current literature following registration in the International Prospective Register of Systematic Reviews (PROSPERO) with registration number CRD42018086034 for prospective trials comparing the role of NMP device to SCS in liver transplant by searching the PubMed, EMBASE, Cochrane, BIOSIS, Crossref, and Scopus databases and clinical trial registry. RESULTS The literature search identified five prospective clinical trials (four being early phase single institutional and single randomized multi-institutional) comparing 187 donor livers on NMP device to 273 donor livers on SCS. The primary outcome of interest was to assess the safety and graft survival at day 30 after transplant following NMP of the donor liver. Secondary outcomes included were early allograft dysfunction (EAD) in the first seven days; serum measures of liver functions as bilirubin, aspartate aminotransferase (AST), alanine amino transferase (ALT), alkaline phosphatase (ALP), and international normalized ratio (INR) on days 1-7; major complications as defined by a Clavien-Dindo score ≥ 3; and patient and graft survival and biliary complications at six months. The peaked median AST level between days 1 and 7 in the five trials was 417-1252 U/L (range 84-15009 U/L) while on NMP and 839-1474 U/L (range 153-8786 U/L) in SCS group. The median bilirubin level on day 7 ranged within 25-79 µmol/L (range 8-344 µmol/l) and 30-47.53 µmol/l (range 9-340 µmol/l) in NMP and SCS groups, respectively. A single case of PNF was reported in NMP group in the randomized trial while none of the other preliminary studies reported any in either group. There was intertrial variability in EAD which ranged within 15-56% in NMP group while being within 23-37% in SCS group. Biliary complications observed in NMP group ranged from 0 to 20%. Single device malfunction was reported in randomized controlled trial leading to renouncement of transplant while none of the other trials reported any machine failure, although two user related device errors inadvertent were reported. CONCLUSION This review outlines that NMP not only demonstrated safety and efficacy but also provided the favourable environment of organ preservation, repair, and viability assessment to donor liver prior to the transplantation with low rate of posttransplantation complication as PNF, EAD, and biliary complication; however further studies are needed to broaden our horizon.
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Affiliation(s)
- Kumar Jayant
- Department of Surgery and Cancer, Imperial College London, London, UK
| | - Isabella Reccia
- Department of Surgery and Cancer, Imperial College London, London, UK
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Normothermic Ex Vivo Machine Perfusion for Liver Grafts Recovered from Donors after Circulatory Death: A Systematic Review and Meta-Analysis. HPB SURGERY : A WORLD JOURNAL OF HEPATIC, PANCREATIC AND BILIARY SURGERY 2018; 2018:6867986. [PMID: 29849531 PMCID: PMC5937385 DOI: 10.1155/2018/6867986] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/15/2018] [Indexed: 12/20/2022]
Abstract
As a result of donation after circulatory death liver grafts' poor tolerance to cold storage, there has been increasing research interest in normothermic machine perfusion. This study aims to systematically review the current literature comparing normothermic perfusion to cold storage in donation after circulatory death liver grafts and complete a meta-analysis of published large animal and human studies. A total of nine porcine studies comparing cold storage to normothermic machine perfusion for donation after circulatory death grafts were included for analysis. There was a significant reduction in AST (mean difference −2291 U/L, CI (−3019, −1563); P ≤ 0.00001) and ALT (mean difference −175 U/L, CI (−266, −85); P = 0.0001), for normothermic perfusion relative to static cold storage, with moderate (I2 = 61%) and high (I2 = 96%) heterogeneity, respectively. Total bile production was also significantly higher (mean difference = 174 ml, CI (155, 193); P ≤ 0.00001). Further research focusing on standardization, performance of this technology following periods of cold storage, economic implications, and clinical trial data focused on donation after circulatory death grafts will be helpful to advance this technology toward routine clinical utilization for these grafts.
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He X, Ji F, Zhang Z, Tang Y, Yang L, Huang S, Li W, Su Q, Xiong W, Zhu Z, Wang L, Lv L, Yao J, Zhang L, Zhang L, Guo Z. Combined liver-kidney perfusion enhances protective effects of normothermic perfusion on liver grafts from donation after cardiac death. Liver Transpl 2018; 24:67-79. [PMID: 29024427 DOI: 10.1002/lt.24954] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 09/18/2017] [Accepted: 09/26/2017] [Indexed: 12/31/2022]
Abstract
It has been shown that combined liver-kidney normothermic machine perfusion (NMP) is able to better maintain the circuit's biochemical milieu. Nevertheless, whether the combined perfusion is superior to liver perfusion alone in protecting livers from donation after circulatory death (DCD) is unclear. We aimed to test the hypothesis and explored the mechanisms. Livers from 15 DCD pig donors were subjected to either static cold storage (group A), liver-alone NMP (group B), or combined liver-kidney NMP (group C). Livers were preserved for 6 hours and reperfused ex vivo for 2 hours to simulate transplantation or were transplanted in situ. During perfusion, group C showed an improved acid-base and biochemical environment in the circuit over group B. After reperfusion, the architecture of the liver grafts was best preserved in group C, followed by group B, then group A, as shown by the histology and terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling staining of both hepatocytes and biliary epithelium. Ki-67 staining showed substantial hepatocyte proliferation and biliary epithelial regeneration after perfusion in group B and group C. Group C produced more bile in the reperfusion phase than those in group A and group B, with more physiological bile composition and less severe biliary epithelium injury. Von Willebrand factor-positive endothelial cells and E-selectin expression decreased in both group B and group C. Combined liver-kidney NMP not only produced more adenosine triphosphate, protected the nitric oxide signaling pathway, but also diminished oxidative stress (high mobility group box-1 protein and 8-hydroxy-2-deoxy guanosine levels) and inflammatory cytokine (IL6 and IL8) release when compared with liver-alone NMP and CS. In addition, the 7-day survival rate of liver transplant recipients was higher in group C than that in groups A and B. In conclusion, combined liver-kidney NMP can better protect DCD livers from warm ischemia and reperfusion injury probably by maintaining the stability of the internal environment and by abolishing oxidative stress injury. Liver Transplantation 24 67-79 2018 AASLD.
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Affiliation(s)
- Xiaoshun He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Fei Ji
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Pediatric Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Zhiheng Zhang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Yunhua Tang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Lu Yang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shanzhou Huang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Wenwen Li
- Laboratory Animal Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qiao Su
- Laboratory Animal Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wei Xiong
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zebin Zhu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Linhe Wang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Lei Lv
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Jiyou Yao
- Surgical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Linan Zhang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
| | - Longjuan Zhang
- Laboratory of Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhiyong Guo
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, China
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23
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Hobeika MJ, Miller CM, Pruett TL, Gifford KA, Locke JE, Cameron AM, Englesbe MJ, Kuhr CS, Magliocca JF, McCune KR, Mekeel KL, Pelletier SJ, Singer AL, Segev DL. PROviding Better ACcess To ORgans: A comprehensive overview of organ-access initiatives from the ASTS PROACTOR Task Force. Am J Transplant 2017; 17:2546-2558. [PMID: 28742951 DOI: 10.1111/ajt.14441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 06/25/2017] [Accepted: 07/13/2017] [Indexed: 01/25/2023]
Abstract
The American Society of Transplant Surgeons (ASTS) PROviding better Access To Organs (PROACTOR) Task Force was created to inform ongoing ASTS organ access efforts. Task force members were charged with comprehensively cataloguing current organ access activities and organizing them according to stakeholder type. This white paper summarizes the task force findings and makes recommendations for future ASTS organ access initiatives.
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Affiliation(s)
- M J Hobeika
- Department of Surgery, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - C M Miller
- Liver Transplantation Program, Cleveland Clinic, Cleveland, OH, USA
| | - T L Pruett
- Division of Transplantation, Department of Surgery, University of Minnesota, Minneapolis, MN, USA
| | - K A Gifford
- American Society of Transplant Surgeons, Arlington, VA, USA
| | - J E Locke
- University of Alabama at Birmingham Comprehensive Transplant Institute, Birmingham, AL, USA
| | - A M Cameron
- Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - M J Englesbe
- Department of Surgery, Section of Transplantation, University of Michigan, Ann Arbor, MI, USA
| | - C S Kuhr
- Virginia Mason Medical Center, Seattle, WA, USA
| | - J F Magliocca
- Department of Surgery, Emory University School of Medicine, Atlanta, GA, USA
| | - K R McCune
- Department of Surgery, Columbia University, New York, NY, USA
| | - K L Mekeel
- Division of Transplantation and Hepatobiliary Surgery, University of California San Diego, San Diego, CA, USA
| | - S J Pelletier
- Division of Transplant Surgery, Department of Surgery, University of Virginia, Charlottesville, VA, USA
| | - A L Singer
- Transplant Center, Mayo Clinic, Phoenix, AZ, USA
| | - D L Segev
- Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
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24
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25
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Selzner M, Goldaracena N, Echeverri J, Kaths JM, Linares I, Selzner N, Serrick C, Marquez M, Sapisochin G, Renner EL, Bhat M, McGilvray ID, Lilly L, Greig PD, Tsien C, Cattral MS, Ghanekar A, Grant DR. Normothermic ex vivo liver perfusion using steen solution as perfusate for human liver transplantation: First North American results. Liver Transpl 2016; 22:1501-1508. [PMID: 27339754 DOI: 10.1002/lt.24499] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 05/08/2016] [Accepted: 05/23/2016] [Indexed: 12/12/2022]
Abstract
The European trial investigating normothermic ex vivo liver perfusion (NEVLP) as a preservation technique for liver transplantation (LT) uses gelofusine, a non-US Food and Drug Administration-approved, bovine-derived, gelatin-based perfusion solution. We report a safety and feasibility clinical NEVLP trial with human albumin-based Steen solution. Transplant outcomes of 10 human liver grafts that were perfused on the Metra device at 37 °C with Steen solution, plus 3 units of erythrocytes were compared with a matched historical control group of 30 grafts using cold storage (CS) as the preservation technique. Ten liver grafts were perfused for 480 minutes (340-580 minutes). All livers cleared lactate (final lactate 1.46 mmol/L; 0.56-1.74 mmol/L) and produced bile (61 mL; 14-146 mL) during perfusion. No technical problems occurred during perfusion, and all NEVLP-preserved grafts functioned well after LT. NEVLP versus CS had lower aspartate aminotransferase and alanine aminotransferase values on postoperative days 1-3 without reaching significance. No difference in postoperative graft function between NEVLP and CS grafts was detected as measured by day 7 international normalized ratio (1.1 [1-1.56] versus 1.1 [1-1.3]; P = 0.5) and bilirubin (1.5; 1-7.7 mg/dL versus 2.78; 0.4-15 mg/dL; P = 0.5). No difference was found in the duration of intensive care unit stay (median, 1 versus 2 days; range, 0-8 versus 0-23 days; P = 0.5) and posttransplant hospital stay (median, 11 versus 13 days; range, 8-17 versus 7-89 days; P = 0.23). Major complications (Dindo-Clavien ≥ 3b) occurred in 1 patient in the NEVLP group (10%) compared with 7 (23%) patients in the CS group (P = 0.5). No graft loss or patient death was observed in either group. Liver preservation with normothermic ex vivo perfusion with the Metra device using Steen solution is safe and results in comparable outcomes to CS after LT. Using US Food and Drug Administration-approved Steen solution will avoid a potential regulatory barrier in North America. Liver Transplantation 22 1501-1508 2016 AASLD.
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Affiliation(s)
- Markus Selzner
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | | | - Juan Echeverri
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Johan M Kaths
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Ivan Linares
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Nazia Selzner
- Departments of Medicine, Toronto General Hospital, Toronto, Ontario, Canada
| | - Cyril Serrick
- Perfusion Services, Multi-Organ Transplant Program, Toronto General Hospital, Toronto, Ontario, Canada
| | - Max Marquez
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Gonzalo Sapisochin
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Eberhard L Renner
- Departments of Medicine, Toronto General Hospital, Toronto, Ontario, Canada
| | - Mamatha Bhat
- Departments of Medicine, Toronto General Hospital, Toronto, Ontario, Canada
| | - Ian D McGilvray
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Leslie Lilly
- Departments of Medicine, Toronto General Hospital, Toronto, Ontario, Canada
| | - Paul D Greig
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Cynthia Tsien
- Departments of Medicine, Toronto General Hospital, Toronto, Ontario, Canada
| | - Mark S Cattral
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - Anand Ghanekar
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
| | - David R Grant
- Departments of Surgery, Toronto General Hospital, Toronto, Ontario, Canada.
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26
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Abstract
BACKGROUND The high demand for livers for transplantation has led to organs of limited quality being accepted to expand the donor pool. This is associated with inferior outcomes due to more pronounced preservation injury. Accordingly, recent research has aimed to develop preservation modalities for improved preservation as well as strategies for liver viability assessment and liver reconditioning. METHODS The PubMed database was searched using the terms 'perfusion', 'liver', 'preservation', and 'reconditioning' in various combinations, and the according literature was reviewed. RESULTS Several perfusion techniques have been developed in recent years with the potential for liver reconditioning. Preclinical and first emerging clinical data suggest feasibility, safety, and superiority over the current gold standard of cold storage. CONCLUSION This review outlines current advances in the field of liver preservation with an emphasis on liver reconditioning methods.
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Affiliation(s)
- Dieter P Hoyer
- General, Visceral and Transplantation Surgery, University Hospital Essen, Essen, Germany
| | - Thomas Minor
- General, Visceral and Transplantation Surgery, University Hospital Essen, Essen, Germany
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27
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Hoyer DP, Paul A, Luer S, Reis H, Efferz P, Minor T. End-ischemic reconditioning of liver allografts: Controlling the rewarming. Liver Transpl 2016; 22:1223-30. [PMID: 27398813 DOI: 10.1002/lt.24515] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 06/28/2016] [Indexed: 12/13/2022]
Abstract
Different nonhypothermic preservation modalities have shown beneficial effects in liver transplantation models. This study compares controlled oxygenated rewarming (COR) to normothermic machine perfusion (NMP) to resuscitate liver grafts following cold storage (CS). Porcine livers were preserved for 18 hours by CS. Before reperfusion, the grafts were put on a machine perfusion device (Liver Assist) for 3 hours and were randomly assigned to COR (n = 6) or NMP (n = 5) and compared to standard CS. COR was carried out with the new Custodiol-N solution, slowly increasing temperature from 8 °C to 20 °C during the first 90 minutes. NMP was carried out with diluted autologous blood at 37 °C for 3 hours. In both cases, the perfusate was oxygenated to partial pressure of oxygen > 500 mm Hg. Then liver viability was tested for 180 minutes during in vitro isolated sanguineous reperfusion. Activity of the mitochondrial caspase 9 was lower after COR. Measurement of tissue adenosine triphosphate and total adenine nucleotides at the end of the reconditioning period showed better energetic recovery after COR. COR also resulted in significantly lower enzyme leakage and higher bile production (P < 0.05) during reperfusion. This first comparison of COR and NMP as end-ischemic reconditioning modalities demonstrates superior results in terms of mitochondrial integrity resulting in better energetic recovery, less hepatocellular injury, and ultimately superior function in favor of COR. Liver Transplantation 22 1223-1230 2016 AASLD.
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Affiliation(s)
- Dieter Paul Hoyer
- General, Visceral and Transplantation Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Andreas Paul
- General, Visceral and Transplantation Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Sebastian Luer
- General, Visceral and Transplantation Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Henning Reis
- Institute of Pathology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Patrik Efferz
- General, Visceral and Transplantation Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Thomas Minor
- General, Visceral and Transplantation Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
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28
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Banan B, Watson R, Xu M, Lin Y, Chapman W. Development of a normothermic extracorporeal liver perfusion system toward improving viability and function of human extended criteria donor livers. Liver Transpl 2016; 22:979-93. [PMID: 27027254 DOI: 10.1002/lt.24451] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 03/08/2016] [Accepted: 03/21/2016] [Indexed: 12/23/2022]
Abstract
Donor organ shortages have led to an increased interest in finding new approaches to recover organs from extended criteria donors (ECD). Normothermic extracorporeal liver perfusion (NELP) has been proposed as a superior preservation method to reduce ischemia/reperfusion injury (IRI), precondition suboptimal grafts, and treat ECD livers so that they can be successfully used for transplantation. The aim of this study was to investigate the beneficial effects of a modified NELP circuit on discarded human livers. Seven human livers that were rejected for transplantation were placed on a modified NELP circuit for 8 hours. Perfusate samples and needle core biopsies were obtained at hourly intervals. A defatting solution that contained exendin-4 (50 nM) and L-carnitine (10 mM) was added to the perfusate for 2 steatotic livers. NELP provided normal temperature, electrolytes, and pH and glucose levels in the perfusate along with physiological vascular flows and pressures. Functional, biochemical, and microscopic evaluation revealed no additional injuries to the grafts during NELP with an improved oxygen extraction ratio (>0.5) and stabilized markers of hepatic injury. All livers synthesized adequate amounts of bile and coagulation factors. We also demonstrated a mild reduction (10%) of macroglobular steatosis with the use of the defatting solution. Histology demonstrated normal parenchymal architecture and a minimal to complete lack of IRI at the end of NELP. In conclusion, a modified NELP circuit preserved hepatocyte architecture, recovered synthetic functions, and hepatobiliary parameters of ECD livers without additional injuries to the grafts. This approach has the potential to increase the donor pool for clinical transplantation. Liver Transplantation 22 979-993 2016 AASLD.
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Affiliation(s)
- Babak Banan
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Rao Watson
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO.,Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Min Xu
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Yiing Lin
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
| | - William Chapman
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
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29
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Normothermic and subnormothermic ex-vivo liver perfusion in liver transplantation. Curr Opin Organ Transplant 2016; 21:315-21. [DOI: 10.1097/mot.0000000000000305] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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30
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Barbas AS, Goldaracena N, Dib MJ, Selzner M. Ex-vivo liver perfusion for organ preservation: Recent advances in the field. Transplant Rev (Orlando) 2016; 30:154-60. [PMID: 27158081 DOI: 10.1016/j.trre.2016.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 02/15/2016] [Accepted: 03/01/2016] [Indexed: 01/13/2023]
Abstract
Liver transplantation is the optimal treatment for end-stage liver disease but is limited by the severe shortage of donor organs. This shortage has prompted increased utilization of marginal grafts from DCD and extended criteria donors, which poorly tolerate cold storage in comparison to standard criteria grafts. Ex-vivo liver perfusion (EVLP) technology has emerged as a potential alternative to cold storage for organ preservation, but there is no consensus regarding the optimal temperature or conditions for EVLP. Herein, we review recent advances in both pre-clinical and clinical studies, organized by perfusion temperature (hypothermic, subnormothermic, normothermic).
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Affiliation(s)
- A S Barbas
- University of Toronto, Multi-Organ Transplant Program, Department of Surgery, Canada.
| | - N Goldaracena
- University of Toronto, Multi-Organ Transplant Program, Department of Surgery, Canada
| | - M J Dib
- University of Toronto, Multi-Organ Transplant Program, Department of Surgery, Canada
| | - M Selzner
- University of Toronto, Multi-Organ Transplant Program, Department of Surgery, Canada
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