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"Ex-vivo liver perfusion"

Mihai-Calin Pavel, Constantino Fondevila Campo, Victor Molina Santos, Alba Diaz Lorca, Juan Carlos Garcia-Valdecasas Salgado
No abstract text is available yet for this article.
October 19, 2016: Cirugía Española
Sheo B Singh, Ling Kang, Andrea R Nawrocki, Dan Zhou, Margaret Wu, Stephen Previs, Corey Miller, Haiying Liu, Catherine D G Hines, Maria Madeira, Jin Cao, Kithsiri Herath, Liangsu Wang, David E Kelley, Cai Li, Hong-Ping Guan
OBJECTIVES: Platensimycin (PTM) is a natural antibiotic produced by Streptomyces platensis that selectively inhibits bacterial and mammalian fatty acid synthase (FAS) without affecting synthesis of other lipids. Recently, we reported that oral administration of PTM in mouse models (db/db and db/+) with high de novo lipogenesis (DNL) tone inhibited DNL and enhanced glucose oxidation, which in turn led to net reduction of liver triglycerides (TG), reduced ambient glucose, and improved insulin sensitivity...
2016: PloS One
Mariusz Bral, Boris Gala-Lopez, David Bigam, Norman Kneteman, Andrew Malcolm, Scott Livingstone, Axel Andres, Juliet Emamaullee, Leslie Russell, Constantin Coussios, Lori J West, Peter J Friend, A M James Shapiro
After extensive experimentation, outcomes of a first clinical normothermic machine perfusion (NMP) liver UK trial demonstrated feasibility and clear safety, with improved liver function when compared to standard static cold storage (SCS). We herein present a preliminary single centre North-American experience using identical NMP technology. Ten donor liver grafts were procured, 4 (40%) from donation after circulatory death (DCD) donors, of which 9 were transplanted. One liver did not proceed due to a technical failure with portal cannulation, and discarded...
September 17, 2016: American Journal of Transplantation
Nicolas Goldaracena, Juan Echeverri, Vinzent N Spetzler, Johan M Kaths, Andrew S Barbas, Kristine S Louis, Oyedele A Adeyi, David R Grant, Nazia Selzner, Markus Selzner
INTRODUCTION: Normothermic ex vivo liver perfusion (NEVLP) improves graft preservation by avoiding cold ischemic injury. We investigated whether the protective effects of NEVLP can be further improved by applying strategies targeted on reducing the activation of pro-inflammatory cytokines during perfusion. METHODS: Livers retrieved under heart beating conditions were perfused for 4 hours. Following preservation period, pig liver transplantation was performed. In group-1 (n=5) anti-inflammatory strategies (alprostadil, n-acetylcysteine, CO and sevoflurane, subnormothermic temperature (33°C)) were applied...
August 24, 2016: Liver Transplantation
A S Barbas, S J Knechtle
In this issue of the American Journal of Transplantation, Mergental and colleagues from Birmingham, UK report the successful transplantation of five discarded liver allografts following an evaluation period by normothermic ex-vivo liver perfusion (NEVLP) (1). They applied a combination of objective (perfusate lactate/pH, bile production This article is protected by copyright. All rights reserved.
July 12, 2016: American Journal of Transplantation
Markus Selzner, Nicolas Goldaracena, Juan Echeverri, Johan M Kaths, Ivan Linares, Nazia Selzner, Cyril Serrick, Max Marquez, Gonzalo Sapisochin, Eberhard L Renner, Mamatha Bhat, Ian D McGilvray, Leslie Lilly, Paul D Greig, Cynthia Tsien, Mark S Cattral, Anand Ghanekar, David R Grant
: The European trial investigating normothermic ex vivo liver perfusion (NEVLP) as a preservation technique for liver transplantation (LT) uses Gelofusine(TM) , a non-FDA approved bovine derived gelatin-based perfusion solution. We report a safety and feasibility clinical NEVLP trial with human albumin based Steen solution. METHODS: Transplant outcomes of 10 human liver grafts that were perfused on the Metra(TM) device at 37°C with Steen solution, plus 3 units of erythrocytes were compared to a matched historical control group of 30 grafts using cold storage (CS) as the preservation technique...
June 24, 2016: Liver Transplantation
A S Barbas, N Goldaracena, M J Dib, M Selzner
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...
July 2016: Transplantation Reviews
Nicolas Goldaracena, Andrew S Barbas, Markus Selzner
PURPOSE OF REVIEW: In the current era of extreme organ shortage, warm (subnormothermic and normothermic) ex-vivo liver perfusion has emerged as a novel strategy to recover marginal organs and increase the organ pool. Over the last decade, significant progress in the field has taken this technology from bench to bedside. This review will cover the most relevant contributions to the field in 2015. RECENT FINDINGS: Several groups made significant advances in warm ex-vivo liver perfusion for optimizing preservation of liver grafts...
June 2016: Current Opinion in Organ Transplantation
Babak Banan, Rao Watson, Min Xu, Yiing Lin, William Chapman
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...
July 2016: Liver Transplantation
Sahar Taba Taba Vakili, Roshni Kailar, Khalidur Rahman, Behtash Ghazi Nezami, Simon Musyoka Mwangi, Frank A Anania, Shanthi Srinivasan
Moderate macrovesicular steatosis (>30%), which is present in almost 50% of livers considered for transplantation, increases the risk of primary graft dysfunction. Our previously published data showed that glial cell line-derived neurotrophic factor (GDNF) is protective against high-fat diet (HFD)-induced hepatic steatosis in mice. Hence, we hypothesized that perfusion of steatotic livers with GDNF may reduce liver fat content before transplantation. Livers from 8 weeks of regular diet (RD) and of HFD-fed mice were perfused ex vivo for 4 hours with either vehicle, GDNF, or a previously described defatting cocktail...
April 2016: Liver Transplantation
Naoki Tanimine, Yuka Tanaka, Tomoyuki Abe, Jinlian Piao, Kazuaki Chayama, Hideki Ohdan
BACKGROUND: NKp46 expression in natural killer (NK) cells has recently been shown to affect the responsiveness to antiviral treatment in hepatitis C virus (HCV)-infected patients. However, the density of NKp46 on intrahepatic NK cells is remarkably higher than that on peripherally circulating NK cells, whereas the biophylactic function of intrahepatic NK cells against HCV reinfection remains unclear. METHODS: We analyzed the phenotypic and functional properties of intrahepatic NK cells using mononuclear cells extracted from ex vivo liver perfusates from living liver transplantation donors...
February 2016: Transplantation
T Li, J-Y Zhu, F-S Wang, X-S Leng
BACKGROUND: Kupffer cell (KC), a kind of important antigen-presenting cell in liver, play an important role in the process of acute rejection after liver transplantation. The aim of this study was to investigate effect of suppression of donor KC B7 expression on recipient lymphocyte activation and secretion of interleukin-2 (IL-2) in vitro. METHODS: Liver ex vivo perfusion with collagenase IV and density-gradient centrifugation were used to isolate donor Lewis rat KCs...
December 2015: Transplantation Proceedings
Xiong-ying Jiang, Yang-kui Gu, Jin-hua Huang, Fei Gao, Ru-hai Zou, Tian-qi Zhang
OBJECTIVE: To compare temperature, energy, and coagulation between hydrochloric acid-infused radiofrequency ablation (HAIRFA) and normal saline-infused radiofrequency ablation (NSIRFA) in ex vivo porcine liver model. MATERIALS AND METHODS: 30 fresh porcine livers were excised in 60 lesions, 30 with HAIRFA and the other 30 with NSIRFA. Both modalities used monopolar perfusion electrode connected to a RF generator set at 103 °C and 30 W. In each group, ablation time was set at 10, 20, or 30 min (10 lesions from each group at each time)...
April 2016: Cardiovascular and Interventional Radiology
Bote G Bruinsma, Yeonhee Kim, Tim A Berendsen, Sinan Ozer, Martin L Yarmush, Basak E Uygun
BACKGROUND: Tissue-engineered liver grafts may offer a viable alternative to orthotopic liver transplantation and help overcome the donor organ shortage. Decellularized liver matrices (DLM) have a preserved vasculature and sustain hepatocellular function in culture, but graft survival after transplantation remains limited due to thrombogenicity of the matrix. AIM: To evaluate the effect of heparin immobilization on DLM thrombogenicity. METHODS: Heparin was immobilized on DLMs by means of layer-by-layer deposition...
2015: Journal of Clinical and Translational Research
Babak Banan, Zhenyu Xiao, Rao Watson, Min Xu, Jianluo Jia, Gundumi A Upadhya, Thalachallour Mohanakumar, Yiing Lin, William Chapman
Normothermic extracorporeal liver perfusion (NELP) can decrease ischemia/reperfusion injury to the greatest degree when cold ischemia time is minimized. Warm perfusion of cold-stored livers results in hepatocellular damage, sinusoidal endothelial cell (SEC) dysfunction, and Kupffer cell activation. However, the logistics of organ procurement mandates a period of cold preservation before NELP. The aim of this study was to determine the beneficial effects of gradual rewarming of cold-stored livers by placement on NELP...
March 2016: Liver Transplantation
Vinzent N Spetzler, Nicolas Goldaracena, Juan Echiverri, J Moritz Kaths, Kristine S Louis, Oyedele A Adeyi, Paul M Yip, David R Grant, Nazia Selzner, Markus Selzner
We developed a novel technique of subnormothermic ex vivo liver perfusion (SNEVLP) for the storage of liver grafts before transplantation. To test the safety of SNEVLP for the nonextended criteria grafts (standard grafts), we compared it to a control group with minimal cold static storage (CS) time. Heart-beating pig liver retrieval was performed. Grafts were either stored in cold unmodified University of Wisconsin solution (CS-1), in cold University of Wisconsin solution with ex vivo perfusion additives (CS-2), or preserved with a sequence of 3 hours CS and 3 hours SNEVLP (33°C), followed by orthotopic liver transplantation...
January 2016: Liver Transplantation
Jan M Knaak, Vinzent N Spetzler, Nicolas Goldaracena, Markus U Boehnert, Fateh Bazerbachi, Kristine S Louis, Oyedele A Adeyi, Leonid Minkovich, Paul M Yip, Shaf Keshavjee, Gary A Levy, David R Grant, Nazia Selzner, Markus Selzner
An ischemic-type biliary stricture (ITBS) is a common feature after liver transplantation using donation after cardiac death (DCD) grafts. We compared sequential subnormothermic ex vivo liver perfusion (SNEVLP; 33°C) with cold storage (CS) for the prevention of ITBS in DCD liver grafts in pig liver transplantation (n = 5 for each group). Liver grafts were stored for 10 hours at 4°C (CS) or preserved with combined 7-hour CS and 3-hour SNEVLP. Parameters of hepatocyte [aspartate aminotransferase (AST), international normalized ratio (INR), factor V, and caspase 3 immunohistochemistry], endothelial cell (EC; CD31 immunohistochemistry and hyaluronic acid), and biliary injury and function [alkaline phosphatase (ALP), total bilirubin, and bile lactate dehydrogenase (LDH)] were determined...
November 2014: Liver Transplantation
Jan M Knaak, Vinzent N Spetzler, Nicolas Goldaracena, Kristine S Louis, Nazia Selzner, Markus Selzner
The success of liver transplantation has resulted in a dramatic organ shortage. In most transplant regions 20-30% of patients on the waiting list for liver transplantation die without receiving an organ transplant or are delisted for disease progression. One strategy to increase the donor pool is the utilization of marginal grafts, such as fatty livers, grafts from older donors, or donation after cardiac death (DCD). The current preservation technique of cold static storage is only poorly tolerated by marginal livers resulting in significant organ damage...
2014: Journal of Visualized Experiments: JoVE
Barbara Bojko, Krzysztof Gorynski, German A Gomez-Rios, Jan M Knaak, Tiago Machuca, Erasmus Cudjoe, Vinzent N Spetzler, Michael Hsin, Marcelo Cypel, Markus Selzner, Mingyao Liu, Shaf Keshjavee, Janusz Pawliszyn
The techniques currently used for drug, metabolite, and biomarker determination are based on sample collection, and therefore they are not suitable for repeated analysis because of the high invasiveness. Here, we present a novel method of biochemical analysis directly in organ during operation without need of a separate sample collection step: solid-phase microextraction (SPME). The approach is based on flexible microprobe coated with biocompatible extraction phase that is inserted to the tissue with no damage or disturbance of the organ...
May 2014: Laboratory Investigation; a Journal of Technical Methods and Pathology
Sylvester M Black, Bryan A Whitson, Murugesan Velayutham
Liver transplantation is a highly successful treatment for end-stage liver disease. While liver transplantation is often the only effective treatment for cirrhosis there is a critical shortage of donor organs, leading to death of many potential recipients on the waiting list. Marginal liver grafts are increasingly being used in an attempt to increase the number of donor livers utilized for transplantation. Marginal donor livers often have complications and worse outcomes for recipients receiving these types of transplant...
May 2014: Medical Hypotheses
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