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liver perfusion

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https://www.readbyqxmd.com/read/28717878/the-isolation-of-primary-hepatocytes-from-human-tissue-optimising-the-use-of-small-non-encapsulated-liver-resection-surplus
#1
Charlotte J Green, Catriona A Charlton, Lai-Mun Wang, Michael Silva, Karl J Morten, Leanne Hodson
Two-step perfusion is considered the gold standard method for isolating hepatocytes from human liver tissue. As perfusion may require a large tissue specimen, which is encapsulated and has accessible vessels for cannulation, only a limited number of tissue samples may be suitable. Therefore, the aim of this work was to develop an alternative method to isolate hepatocytes from non-encapsulated and small samples of human liver tissue. Healthy tissue from 44 human liver resections were graded for steatosis and tissue weights between 7...
July 17, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/28706986/liver-preservation-by-aortic-perfusion-alone-compared-with-preservation-by-aortic-perfusion-and-additional-arterial-ex-situ-back-table-perfusion-with-histidine-tryptophan-ketoglutarate-solution-a-prospective-randomized-controlled-multicenter-study
#2
Gerd Otto, Michael Heise, Jochen Thies, Michael Pitton, Jens Schneider, Gernot Kaiser, Peter Neuhaus, Otto Kollmar, Michael Barthels, Josef Geks, Wolf Otto Bechstein, Achim Hellinger, Jürgen Klempnauer, Winfried Padberg, Nils Frühauf, Andre Ebbing, Dietmar Mauer, Astrid Schneider, Robert Kwiecien, Kai Kronfeld
BACKGROUND: Arterial ex situ back-table perfusion (BP) reportedly reduces ischemic-type biliary lesion after liver transplantation. We aimed to verify these findings in a prospective investigation. METHODS: Our prospective, randomized, controlled, multicenter study involved livers retrieved from patients in 2 German regions, and compared the outcomes of standard aortic perfusion to those of aortic perfusion combined with arterial ex situ BP. The primary endpoint was the incidence of ischemic-type biliary lesions over a follow-up of 2 years after liver transplantation, whereas secondary endpoints included 2-year graft survival, initial graft damage as reflected by transaminase levels, and functional biliary parameters at 6 months after transplantation...
July 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28703102/intravoxel-incoherent-motion-application-in-differentiation-of-hepatocellular-carcinoma-and-focal-nodular-hyperplasia
#3
Ma Luo, Ling Zhang, Xin Hua Jiang, Wei Dong Zhang
PURPOSE: We aimed to explore whether intravoxel incoherent motion (IVIM)-related parameters of hepatocellular carcinoma (HCC) and focal nodular hyperplasia (FNH) demonstrate differences that could be used to differentiate and improve diagnostic efficiency. METHODS: A total of 27 patients, including 22 with HCC and 5 with FNH, underwent liver 3.0 T magnetic resonance imaging for routine sequences. They were concurrently examined by IVIM diffusion-weighted imaging (DWI) scanning with 11 different b values (0-800 s/mm2)...
July 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28700167/-relevance-of-contrast-ultrasound-with-microbubbles-in-vascular-medecine
#4
Andreas Erdmann, Barbara Ney, Adriano Alatri, Luca Calanca, Lucia Mazzolai
Application of ultrasound contrast media has become a standard in diagnostic imaging in cardiology and in the characterization of focal lesions in multiple organs, especially of the liver. In the past years there was a growing body of evidence for their usefulness in vascular medicine. The development of contrast media, microbubbles with a stabilizing envelope and filled with gaz, small enough to pass through pulmonary capillaries made real-time imaging of organ perfusion possible. Ultrasound contrast media are rapidly eliminated by exhalation and can safely be administered to patients with renal failure...
December 7, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28700002/evaluation-of-silybum-marinaum-efficacy-on-university-of-wisconsin-and-histidine-tryptophan-ketoglutarate-solutions-latter-the-damage-of-the-perfused-liver
#5
Nazmi Özer, Ertan Bülbüloğlu, Serdar Yormaz, İlhan Ece
Purpose: To investigate the hepatoprotective and antioxidant effeicacies of Silybum marianum's (silymarin, S) on University of Wisconsin (UW) and histidinetryptophan-ketoglutarate (HTK) preservation solutions. Methods: Thirty two Wistar albino adult male rats were used. Group 1: UW group, Group 2: UW + Silymarin group(S), Group 3: HTK group, Group 4: HTK + silymarin group (S), respectively. Silymarin was enforced intraperitoneally before the surgery. Biopsies were enforced in 0, 6 and 12...
June 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28694661/relevance-of-proteolysis-and-proteasome-activation-in-fatty-liver-graft-preservation-an-institut-georges-lopez-1-vs-university-of-wisconsin-appraisal
#6
Mohamed Amine Zaouali, Arnau Panisello-Roselló, Alexandre Lopez, Carlos Castro Benítez, Emma Folch-Puy, Agustín García-Gil, Teresa Carbonell, René Adam, Joan Roselló-Catafau
AIM: To compare liver proteolysis and proteasome activation in steatotic liver grafts conserved in University of Wisconsin (UW) and Institut Georges Lopez-1 (IGL-1) solutions. METHODS: Fatty liver grafts from male obese Zücker rats were conserved in UW and IGL-1 solutions for 24 h at 4 °Cand subjected to "ex vivo" normo-thermic perfusion (2 h; 37 °C). Liver proteolysis in tissue specimens and perfusate was measured by reverse-phase high performance liquid chromatography...
June 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28692137/portable-perfusion-phantom-for-quantitative-dce-mri-of-the-abdomen
#7
Harrison Kim, Mina Mousa, Patrick Schexnailder, Robert Hergenrother, Mark Bolding, Bernard Ntsikoussalabongui, Vinoy Thomas, Desiree E Morgan
PURPOSE: To develop a portable perfusion phantom and validate its utility in quantitative dynamic contrast-enhanced magnetic resonance imaging of the abdomen. METHODS: A portable perfusion phantom yielding a reproducible contrast enhancement curve (CEC) was developed. A phantom package including perfusion and static phantoms were imaged simultaneously with each of three healthy human volunteers in two different 3T MR scanners. Look-up tables correlating reference (known) contrast concentrations with measured ones were created using either the static or perfusion phantom...
July 10, 2017: Medical Physics
https://www.readbyqxmd.com/read/28685553/application-of-oxaliplatin-in-combination-with-epirubicin-in-transcatheter-arterial-chemoembolization-in-the-treatment-of-primary-liver-carcinoma
#8
G Chang, L L Xie, W Y Li, F F Xia, P C Huang, Q R Liu, C D Zhang, T J Zhang, H F Li
Many cases of liver carcinoma miss the opportunity of surgical treatment because of hidden onset and delayed diagnosis. In recent years, interventional treatment has gradually become a non-surgical method for treating liver carcinoma. To discuss the effects of oxaliplatin in combination with epirubicin in the treatment and its influence on prognosis, this study randomly selected 218 advanced primary liver carcinoma patients from Binzhou People’s Hospital, Binzhou, China and divided them into a control group (n=109) and an observation group (n=109)...
April 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28684589/imaging-in-metabolic-research-adipose-tissue-and-liver
#9
Jesper Lundbom
Adipose tissue and liver are central tissues in whole body energy metabolism. Their composition, structure and function can be non-invasively imaged using a variety of measurement techniques, which provide a safe alternative to an invasive biopsy. Imaging of adipose tissue is focused on quantitating the distribution of adipose tissue in subcutaneous and intra-abdominal (visceral) adipose tissue depots. Also detailed subdivisions of adipose tissue can be distinguished with modern imaging techniques. Adipose tissue accumulation or infiltration of other organs can also be imaged...
July 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28684188/ascorbate-lacks-significant-influence-in-rats-with-bile-duct-ligation-induced-liver-injury
#10
Hsin-Ling Ho, Teh-Ia Huo, Ting Chang, Wen-Shin Lee, I-Fang Hsin, Fa-Yauh Lee, Hui-Chun Huang, Ming-Chih Hou, Shou-Dong Lee
BACKGROUND: Liver inflammation may induce fibrogenesis, cirrhosis and portal hypertension. Liver cirrhosis is characterized by increased intrahepatic resistance and enhanced vasoconstrictive response. The splanchnic vasodilatation, angiogenesis and portosystemic collaterals formation further bring about lethal complications. Ascorbate is a potent antioxidant with anti-inflammation, anti-fibrosis, and anti-angiogenesis effects. However, the relevant influences in chronic liver injury have not been sufficiently explored...
July 3, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28684184/quantitative-analysis-of-hepatic-microcirculation-in%C3%A2-rabbits%C3%A2-after-liver-ischemia-reperfusion-injury%C3%A2-using%C3%A2-contrast-enhanced-ultrasound
#11
Haiyuan Li, Jingning Lu, Xiaofeng Zhou, Denghua Pan, Dequan Guo, Haiying Ling, Hong Yang, Yun He, Gang Chen
Previous studies have shown that contrast-enhanced ultrasound (CEUS) can be used quantitatively to analyze microcirculation blood perfusion in hepatocellular carcinoma patients. However, limited data have described the application of CEUS in hepatic microcirculation after liver ischemic-reperfusion injury (IRI). The purpose of this study was to explore the use of CEUS quantitatively to assess liver microcirculation after liver IRI. We randomly sorted 45 New Zealand rabbits into 3 groups (15 in each). Group A was a control group in which the rabbits underwent laparotomy alone...
July 3, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28683350/the-metabolic-effects-of-diuron-in-the-rat-liver
#12
Mellina da Silva Simões, Lívia Bracht, Angela Valderrama Parizotto, Jurandir Fernando Comar, Rosane Marina Peralta, Adelar Bracht
A systematic study on the effects of diuron on the hepatic metabolism was conducted with emphasis on parameters linked to energy metabolism. The experimental system was the isolated perfused rat liver. The results demonstrate that diuron inhibited biosynthesis (gluconeogenesis) and ammonia detoxification, which are dependent of ATP generated within the mitochondria. Conversely, it stimulated glycolysis and fructolysis, which are compensatory phenomena for an inhibited mitochondrial ATP generation. Furthermore, diuron diminished the cellular ATP content under conditions where the mitochondrial respiratory chain was the only source of this compound...
June 27, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28668428/liver-mri-from-basic-protocol-to-advanced-techniques
#13
Henrique Donato, Manuela França, Isabel Candelária, Filipe Caseiro-Alves
Liver MR is a well-established modality with multiparametric capabilities. However, to take advantage of its full capacity, it is mandatory to master the technique and optimize imaging protocols, apply advanced imaging concepts and understand the use of different contrast media. Physiologic artefacts although inherent to upper abdominal studies can be minimized using triggering techniques and new strategies for motion control. For standardization, the liver MR protocol should include motion-resistant T2-w sequences, in-op phase GRE T1 and T2-w fast spin echo sequences with fat suppression...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28665498/enoxaparin-does-not-ameliorate-liver-fibrosis-or-portal-hypertension-in-rats-with-advanced-cirrhosis
#14
José I Fortea, Alexander Zipprich, Carolina Fernandez-Mena, Marta Puerto, Cristina R Bosoi, Jorge Almagro, Marcus Hollenbach, Juan Bañares, Belén Rodríguez-Sánchez, Emilia Cercenado, Marc-André Clément, Christopher F Rose, Rafael Bañares, Javier Vaquero, Cristina Ripoll
BACKGROUND & AIMS: Recent studies suggest that heparins reduce liver fibrosis and the risk of decompensation of liver disease. Here, we evaluated the effects of enoxaparin in several experimental models of advanced cirrhosis. METHODS: Cirrhosis was induced in male Sprague-Dawley (SD) rats by: i. Oral gavage with carbon tetrachloride (CCl4ORAL ), ii. Bile duct ligation (BDL), and iii. CCl4 inhalation (CCl4INH ). Rats received saline or enoxaparin s.c. (40 IU/Kg/d or 180 IU/Kg/d) following various protocols...
June 30, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28665233/decellularization-of-whole-human-liver-grafts-using-controlled-perfusion-for-transplantable-organ-bioscaffolds
#15
Monique Verstegen, Jorke Willemse, Sjoerd van den Hoek, Gert-Jan Kremers, Theo M Luider, Nick A van Huizen, Francois E J A Willemssen, Herold J Metselaar, Jan Nm IJzermans, Luc J W van der Laan, Jeroen de Jonge
Liver transplantation is the only effective treatment for end-stage liver disease, but absolute donor shortage remains a limiting factor. Recent advances in tissue engineering focus on generation of native extracellular matrix (ECM) by decellularized complete livers in animal models. Though proof of concept has been reported for human livers, the current study aims to perform whole liver decellularization in a clinically relevant series using controlled machine perfusion. Here we describe a mild non-destructive decellularization protocol, effective in 11 discarded human whole liver grafts to generate constructs that reliably maintain hepatic architecture and ECM components using machine perfusion, while completely removing cellular DNA and RNA...
June 30, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28664876/scaling-up-of-a-heparg-progenitor-cell-based-bioartificial-liver-optimization-for-clinical-application-and-transport
#16
Martien van Wenum, Philipp Treskes, Chung-Yin Tang, Esmee J Coppens, Koen Jansen, Erik J Hendriks, Sandrine Camus, Thomas M van Gulik, Robert A F M Chamuleau, Ruurdtje Hoekstra
A new generation of bioartificial livers, based on differentiated proliferative hepatocyte sources, has been developed. Several practicable and regulatory demands have to be addressed before these can be clinically evaluated. We identified three main hurdles: (1) expansion and preservation of the biocomponent, (2) development of scaled-up culture conditions and (3) transport of the device to the bedside. In this study we address these three issues for the HepaRG-progenitor cell line-loaded AMC-Bioartificial Liver...
June 30, 2017: Biofabrication
https://www.readbyqxmd.com/read/28662899/l-type-amino-acid-transporter-1-utilizing-prodrugs-how-to-achieve-effective-brain-delivery-and-low-systemic-exposure-of-drugs
#17
Elena Puris, Mikko Gynther, Johanna Huttunen, Aleksanteri Petsalo, Kristiina M Huttunen
L-type amino acid transporter 1 (LAT1) is selectively expressed in the blood-brain barrier (BBB) and brain parenchyma. This transporter can facilitate brain delivery of neuroprotective agents and additionally give opportunity to minimize systemic exposure. Here, we investigated structure-pharmacokinetics relationship of five newly synthesized LAT1-utilizing prodrugs of the cyclooxygenase inhibitor, ketoprofen, in order to identify beneficial structural features of prodrugs to achieve both targeted brain delivery and low peripheral distribution of the parent drug...
June 27, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28660012/angiotensin-ii-or-epinephrine-hemodynamic-and-metabolic-responses-in-the-liver-of-l-name-induced-hypertension-and-spontaneous-hypertensive-rats
#18
Debora Conte Kimura, Marcia Regina Nagaoka, Durval Rosa Borges, Maria Kouyoumdjian
AIM: To study hepatic vasoconstriction and glucose release induced by angiotensin (Ang)II or Epi in rats with pharmacological hypertension and spontaneously hypertensive rat (SHR). METHODS: Isolated liver perfusion was performed following portal vein and vena cava cannulation; AngII or epinephrine (Epi) was injected in bolus and portal pressure monitored; glucose release was measured in perfusate aliquots. RESULTS: The portal hypertensive response (PHR) and the glucose release induced by AngII of L-NAME were similar to normal rats (WIS)...
June 18, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28659683/successful-transplant-of-two-kidneys-harvested-from-a-young-brain-dead-liver-transplant-recipient
#19
Anil Kumar Singh Rana, Nitin Agarwal, Sushant Dutta, Manoj Kumar Dokania
Efforts to increase the dismal deceased renal transplantation (DRT): live renal transplantation (LRT) ratio in our country have gathered momentum recently, with governmental and non-governmental projects focussing on building public awareness and capacity-building, and appropriate legislation. Worldwide, efforts at increasing the number of organs from the deceased pool have focussed on the use of 'expanded criteria donors', including deceased cardiac donors (DCD). 'Reuse' transplant, where an organ is transplanted after removal from the first recipient, is a rare strategy, used more commonly in liver than in kidney transplantation...
June 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28659180/multiparametric-imaging-for-detection-and-characterization-of-hepatocellular-carcinoma-using-gadoxetic-acid-enhanced-mri-and-perfusion-ct-which-parameters-work-best
#20
Mustafa Kurucay, Christopher Kloth, Sascha Kaufmann, Konstantin Nikolaou, Hans Bösmüller, Marius Horger, Wolfgang M Thaiss
BACKGROUND: MRI and perfusion-CT (PCT) are both useful imaging techniques for detection and characterization of liver lesions. The aim of this study was to compare the diagnostic accuracy of imaging parameters derived from PCT and gadoxetic acid-enhanced MRI in patients with hepatocellular carcinoma (HCC). METHODS: 36 patients with liver cirrhosis and a total of 67 lesions referred to our hospital for multi-parametric diagnosis of HCC-suspected liver lesions in the setting of liver cirrhosis were prospectively enrolled and underwent PCT and MRI...
June 28, 2017: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
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