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Liu J, Martins PN, Bhat M, Pang L, Yeung OWH, Ng KTP, Spiro M, Raptis DA, Man K, Mas VR. Biomarkers and predictive models of early allograft dysfunction in liver transplantation - A systematic review of the literature, meta-analysis, and expert panel recommendations. Clin Transplant 2022; 36:e14635. [PMID: 35291044 DOI: 10.1111/ctr.14635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 02/28/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Prompt identification of early allograft dysfunction (EAD) is critical to reduce morbidity and mortality in liver transplant (LT) recipients. OBJECTIVES Evaluate the evidence supporting biomarkers that can provide diagnostic and predictive value for EAD. DATA SOURCES Ovid MEDLINE, Embase, Scopus, Google Scholar, and Cochrane Central. METHODS Systematic review following PRISMA guidelines and recommendations using the GRADE approach was derived from an international expert panel. Studies that investigated biomarkers or models for predicting EAD in adult LT recipients were included for in-depth evaluation and meta-analysis. Olthoff's criteria were used as the standard reference for the diagnostic accuracy evaluation. PROSPERO ID CRD42021293838 RESULTS: Ten studies were included for the systematic review. Lactate, lactate clearance, uric acid, Factor V, HMGB-1, CRP to ALB ratio, phosphocholine, total cholesterol, and metabolomic predictive model were identified as potential early EAD predictive biomarkers. The sensitivity ranged between .39 and .92, while the specificity ranged from .63 to .90. Elevated lactate level was most indicative of EAD after adult LT (pooled diagnostic odds ratio of 7.15 (95%CI: 2.38-21.46)). The quality of evidence (QOE) for lactate as indicator was moderate according to the GRADE approach, whereas the QOE for other biomarkers was very low to low likely as consequence of study design characteristics such as single study, small sample size, and large ranges of sensitivity or specificity. CONCLUSIONS Lactate is an early indicator to predict EAD after LT (Quality of Evidence: Moderate | Grade of Recommendation: Strong). Further multicenter studies and the use of machine perfusion setting should be implemented for validation.
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Affiliation(s)
- Jiang Liu
- Hepato-pancreato-biliary Center, Beijing Tsinghua Changgung Hospital, Tsinghua University, Beijing, China.,Department of Surgery & HKU-Shenzhen Hospital, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | | | - Mamatha Bhat
- Ajmera Transplant Program, University Health Network and Division of Gastroenterology & Hepatology, University of Toronto, Toronto, Canada
| | - Li Pang
- Department of Surgery & HKU-Shenzhen Hospital, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Oscar W H Yeung
- Department of Surgery & HKU-Shenzhen Hospital, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kevin T P Ng
- Department of Surgery & HKU-Shenzhen Hospital, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Michael Spiro
- Department of Anesthesia and Intensive Care Medicine, Royal Free Hospital, London, UK.,Division of Surgery & Interventional Science, University College London, London, UK
| | - Dimitri Aristotle Raptis
- Division of Surgery & Interventional Science, University College London, London, UK.,Clinical Service of HPB Surgery and Liver Transplantation, Royal Free Hospital, London, UK
| | - Kwan Man
- Department of Surgery & HKU-Shenzhen Hospital, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Valeria R Mas
- Department of Surgery, School of Medicine, University of Maryland, Baltimore, USA
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Ohman A, Raigani S, Santiago JC, Heaney MG, Boylan JM, Parry N, Carroll C, Baptista SG, Uygun K, Gruppuso PA, Sanders JA, Yeh H. Activation of autophagy during normothermic machine perfusion of discarded livers is associated with improved hepatocellular function. Am J Physiol Gastrointest Liver Physiol 2022; 322:G21-G33. [PMID: 34730028 PMCID: PMC8698515 DOI: 10.1152/ajpgi.00266.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 10/11/2021] [Accepted: 10/17/2021] [Indexed: 01/31/2023]
Abstract
Liver transplantation is hampered by a severe shortage of donor organs. Normothermic machine perfusion (NMP) of donor livers allows dynamic preservation in addition to viability assessment before transplantation. Little is known about the injury and repair mechanisms induced during NMP. To investigate these mechanisms, we examined gene and protein expression changes in a cohort of discarded human livers, stratified by hepatocellular function, during NMP. Six human livers acquired through donation after circulatory death (DCD) underwent 12 h of NMP. Of the six livers, three met predefined criteria for adequate hepatocellular function. We applied transcriptomic profiling and protein analysis to evaluate temporal changes in gene expression during NMP between functional and nonfunctional livers. Principal component analysis segregated the two groups and distinguished the various perfusion time points. Transcriptomic analysis of biopsies from functional livers indicated robust activation of innate immunity after 3 h of NMP followed by enrichment of prorepair and prosurvival mechanisms. Nonfunctional livers demonstrated delayed and persistent enrichment of markers of innate immunity. Functional livers demonstrated effective induction of autophagy, a cellular repair and homeostasis pathway, in contrast to nonfunctional livers. In conclusion, NMP of discarded DCD human livers results in innate immune-mediated injury, while also activating autophagy, a presumed mechanism for support of cellular repair. More pronounced activation of autophagy was seen in livers that demonstrated adequate hepatocellular function.NEW & NOTEWORTHY We demonstrate that ischemia-reperfusion injury occurs in all livers during NMP, though there are notable differences in gene expression between functional and nonfunctional livers. We further demonstrate that activation of the liver's repair and homeostasis mechanisms through autophagy plays a vital role in the graft's response to injury and may impact liver function. These findings indicate that liver autophagy might be a key therapeutic target for rehabilitating the function of severely injured or untransplantable livers.
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Affiliation(s)
- Anders Ohman
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, Rhode Island
| | - Siavash Raigani
- Division of Transplant Surgery, Massachusetts General Hospital, Boston, Massachusetts
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - John C Santiago
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, Rhode Island
| | - Megan G Heaney
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, Rhode Island
| | - Joan M Boylan
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, Rhode Island
| | - Nicola Parry
- Section of Pathology, Cummings School of Veterinary Medicine at Tufts University, North Grafton, Massachusetts
| | - Cailah Carroll
- Division of Transplant Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Sofia G Baptista
- Division of Transplant Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Korkut Uygun
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Philip A Gruppuso
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, Rhode Island
| | - Jennifer A Sanders
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, Rhode Island
| | - Heidi Yeh
- Division of Transplant Surgery, Massachusetts General Hospital, Boston, Massachusetts
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Boteon YL, Hessheimer AJ, Brüggenwirth IMA, Boteon APCS, Padilla M, de Meijer VE, Domínguez-Gil B, Porte RJ, Perera MTPR, Martins PN. The economic impact of machine perfusion technology in liver transplantation. Artif Organs 2021; 46:191-200. [PMID: 34878658 DOI: 10.1111/aor.14131] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/03/2021] [Accepted: 11/14/2021] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Several clinical studies have demonstrated the safety, feasibility, and efficacy of machine perfusion in liver transplantation, although its economic outcomes are still underexplored. This review aimed to examine the costs related to machine perfusion and its associated outcomes. METHODS Expert opinion of several groups representing different machine perfusion modalities. Critical analysis of the published literature reporting the economic outcomes of the most used techniques of machine perfusion in liver transplantation (normothermic and hypothermic ex situ machine perfusion and in situ normothermic regional perfusion). RESULTS Machine perfusion costs include disposable components of the perfusion device, perfusate components, personnel and facility fees, and depreciation of the perfusion device or device lease fee. The limited current literature suggests that although this upfront cost varies between perfusion modalities, its use is highly likely to be cost-effective. Optimization of the donor liver utilization rate, local conditions of transplant programs (long waiting list times and higher MELD scores), a decreased rate of complications, changes in logistics, and length of hospital stay are potential cost savings points that must highlight the expected benefits of this intervention. An additional unaccounted factor is that machine perfusion optimizing donor organ utilization allows patients to be transplanted earlier, avoiding clinical deterioration while on the waiting list and the costs associated with hospital admissions and other required procedures. CONCLUSION So far, the clinical benefits have guided machine perfusion implementation in liver transplantation. Albeit there is data suggesting the economic benefit of the technique, further investigation of its costs to healthcare systems and society and associated outcomes is needed.
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Affiliation(s)
- Yuri L Boteon
- Liver Unit, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Amelia J Hessheimer
- Hepatopancreatobiliary Surgery & Transplantation, General & Digestive Surgery Service, Hospital Universitario La Paz, Madrid, Spain
| | - Isabel M A Brüggenwirth
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | | | - María Padilla
- Organización Nacional de Trasplantes, Ministerio de Sanidad, Madrid, Spain
| | - Vincent E de Meijer
- Department of Surgery, Section of Hepatobiliary Surgery and Liver Transplantation, 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
| | - M Thamara P R Perera
- Liver Unit, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Paulo N Martins
- Department of Surgery, Transplant Division, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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Raigani S, Carroll C, Griffith S, Pendexter C, Rosales I, Deirawan H, Beydoun R, Yarmush M, Uygun K, Yeh H. Improvement of steatotic rat liver function with a defatting cocktail during ex situ normothermic machine perfusion is not directly related to liver fat content. PLoS One 2020; 15:e0232886. [PMID: 32396553 PMCID: PMC7217452 DOI: 10.1371/journal.pone.0232886] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 04/23/2020] [Indexed: 12/12/2022] Open
Abstract
There is a significant organ shortage in the field of liver transplantation, partly due to a high discard rate of steatotic livers from donors. These organs are known to function poorly if transplanted but make up a significant portion of the available pool of donated livers. This study demonstrates the ability to improve the function of steatotic rat livers using a combination of ex situ machine perfusion and a "defatting" drug cocktail. After 6 hours of perfusion, defatted livers demonstrated lower perfusate lactate levels and improved bile quality as demonstrated by higher bile bicarbonate and lower bile lactate. Furthermore, defatting was associated with decreased gene expression of pro-inflammatory cytokines and increased expression of enzymes involved in mitochondrial fatty acid oxidation. Rehabilitation of marginal or discarded steatotic livers using machine perfusion and tailored drug therapy can significantly increase the supply of donor livers for transplantation.
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Affiliation(s)
- Siavash Raigani
- Division of Transplant Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
| | - Cailah Carroll
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
| | - Stephanie Griffith
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
| | - Casie Pendexter
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
| | - Ivy Rosales
- Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, United States of America
| | - Hany Deirawan
- Department of Pathology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Rafic Beydoun
- Department of Pathology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Martin Yarmush
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey, United States of America
| | - Korkut Uygun
- Division of Transplant Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
| | - Heidi Yeh
- Division of Transplant Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
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Bone marrow mesenchymal stem cells combine with normothermic machine perfusion to improve rat donor liver quality-the important role of hepatic microcirculation in donation after circulatory death. Cell Tissue Res 2020; 381:239-254. [PMID: 32347385 PMCID: PMC7369267 DOI: 10.1007/s00441-020-03202-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 03/06/2020] [Indexed: 02/07/2023]
Abstract
Donation after circulatory death (DCD) can expand the donor pool effectively. A gap remains in outcome between DCD livers and living donor livers, warranting improved DCD liver quality and urgent resolution. Bone marrow mesenchymal stem cells (BMMSCs) can regulate immunity, participate in the anti-inflammatory response, and secrete cytokines. We investigated the effect of BMMSCs combined with normothermic machine perfusion (NMP) on DCD liver quality, and the role of microcirculation therein. Rat thoracic aortas were clipped to obtain DCD livers, and a rat NMP system was established. The DCD livers were grouped by preservation method: normal, static cold storage (SCS), NMP (P), and BMMSCs plus NMP (BP); storage time was up to 8 h. Liver function in outflow perfusate was detected by biochemical methods; liver tissue histopathology was observed by hematoxylin–eosin staining; hepatocyte ultrastructure was observed by transmission electron microscopy; hepatocyte apoptosis was detected by terminal deoxynucleotidyl transferase dUTP nick end labeling; liver microcirculation–related indicators were detected by immunofluorescence, immunohistochemistry, Western blotting, and enzyme-linked immunosorbent assay. Compared with SCS, P and BP significantly improved liver function and liver histological damage, reduced hepatocyte apoptosis, and repaired hepatocyte mitochondrial damage after 6 h in vitro. BP also significantly inhibited intrahepatic macrophage activation and intercellular adhesion, improved endothelial damage, and significantly improved endothelin 1–nitric oxide balance and microcirculation perfusion. In conclusion, BP can improve DCD liver microcirculation and quality. The mechanism may be the improvement of improve hepatic sinusoidal endothelial injury and microcirculation perfusion by inhibiting macrophage activation and intercellular adhesion.
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