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Isolated liver perfusion

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https://www.readbyqxmd.com/read/29673130/effects-of-gip-on-regional-blood-flow-during-normoglycemia-and-hyperglycemia-in-anesthetized-rats
#1
Xiang Gao, Andreas Lindqvist, Monica Sandberg, Leif Groop, Nils Wierup, Leif Jansson
The incretin hormone glucose-dependent insulinotropic polypeptide (GIP) potentiates glucose-stimulated insulin secretion, and affects β-cell turnover. This study aimed at evaluating if some of the beneficial effects of GIP on glucose homeostasis can be explained by modulation of islet blood flow. Anesthetized Sprague-Dawley rats were infused intravenously with different doses of GIP (10, 20, or 60 ng/kg*min) for 30 min. Subsequent organ blood flow measurements were performed with microspheres. In separate animals, islets were perfused ex vivo with GIP (10-6 -10-12  mol/L) during normo- and hyperglycemia and arteriolar responsiveness was recorded...
April 2018: Physiological Reports
https://www.readbyqxmd.com/read/29643992/description-of-organ-specific-phenotype-and-functional-characteristics-of-tissue-resident-lymphocytes-from-liver-transplantation-donor-and-research-on-immune-tolerance-mechanism-of-liver
#2
Yunpeng Shi, Ping Zhang, Guangyi Wang, Xingkai Liu, Xiaodong Sun, Xin Zhang, Haijun Li, Jun Qi, Lei Ding, Ting Li, Ruoyan Zhang, Yuguo Chen, Jianpeng Zhou, Guoyue Lv, Zhengkun Tu
Aim: Prior to transplantation, Donation after Cardiac Death (DCD) liver transplantation livers are perfused with preservation solution. Therefore, this provides an abundant source of human liver lymphocytes, as well as mesenteric lymph node and spleen for the study of lymphocyte subset diversity in the peripheral blood, lymph node, spleen and liver. Methods: Lymphocyte subsets were isolated and purified from peripheral blood, lymph node, spleen and liver perfusion, the phenotypic and functional analysis of the tissue resident lymphocyte were performed by flow cytometry...
March 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29626522/the-acute-effects-of-citrus-flavanones-on-the-metabolism-of-glycogen-and-monosaccharides-in-the-isolated-perfused-rat-liver
#3
Gilson Soares do Nascimento, Renato Polimeni Constantin, Eduardo Hideo Gilglioni, Cristiane Vizioli de Castro Ghizoni, Adelar Bracht, Karina Sayuri Utsunomiya, Nair Seiko Yamamoto, Emy Luiza Ishii-Iwamoto, Jorgete Constantin, Rodrigo Polimeni Constantin
Citrus flavanones are often linked to their antihyperglycemic properties. This effect may be in part due to the inhibition of hepatic gluconeogenesis through different mechanisms. One of the possible mechanisms appears to be impairment of oxidative phosphorylation, which may also interfere with glycogen metabolism. Based on these facts, the purpose of the present study was to investigate the effects of three citrus flavanones on glycogenolysis in the isolated perfused rat liver. Hesperidin, hesperetin, and naringenin stimulated glycogenolysis and glycolysis from glycogen with concomitant changes in oxygen uptake...
April 4, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29609847/angiotensin-iv-improves-subnormothermic-machine-perfusion-preservation-of-rat-liver-graft
#4
Donia Tabka, Mohamed Bejaoui, James Javellaud, Jean-Michel Achard, Hassen Ben Abdennebi
This study aims to determine whether Angiotensin IV (Ang IV) addition to Celsior preservation solution could improve hepatic endothelium function and provide better liver protection during subnormothermic machine preservation (SMP). Two experimental models were used: In the first part of the study, rings isolated from rat hepatic artery were preserved in Celsior solution (6 h, 20 °C) with and without Ang IV (10-9  M), then, endothelium-dependent relaxation (EDR) and the concentration of acetylcholine inducing half-maximal relaxation of pre-contracted rings (EC50) were measured...
March 30, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29596325/preconditioning-like-properties-of-short-term-hypothermia-in-isolated-perfused-rat-liver-iprl-system
#5
Norma Alva, Raquel G Bardallo, David Basanta, Jesús Palomeque, Teresa Carbonell
Hypothermia may attenuate the progression of ischemia-induced damage in liver. Here, we determined the effects of a brief cycle of hypothermic preconditioning applied before an ischemic/reperfusion (I/R) episode in isolated perfused rat liver (IPRL) on tissue damage and oxidative stress. Rats (male, 200-250 g) were anaesthetised with sodium pentobarbital (60 mg·kg-1 i.p) and underwent laparatomy. The liver was removed and perfused in a temperature-regulated non-recirculating system. Livers were randomly divided into two groups ( n = 6 each group)...
March 29, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29589340/influence-of-nutritional-status-on-the-absorption-of-polyphyllin-i-an-anticancer-candidate-from-paris-polyphylla-in-rats
#6
Feng-Ling Yu, Wei-Liang Gong, Fang-Jiang Xu, Jun-Wen Wu, Shailendra Shakya, He Zhu
BACKGROUND AND OBJECTIVES: Protein-calorie malnutrition (PCM) is one of the most suffered complications in cancer patients. Polyphyllin I (PPI), a saponin isolated from rhizome of Paris polyphylla, is a potential candidate in cancer therapy. In this study, the influence of nutritional status on the absorption of PPI in rats was explored after oral administration. METHODS: PCM rats, namely mal-nourished (MN) rats, were induced from well-nourished (WN) rats by caloric restriction protocol...
March 28, 2018: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/29558716/protective-effects-of-phycocyanin-on-ischemia-reperfusion-liver-injuries
#7
Neyla Ben Gdara, Amel Belgacem, Ikram Khemiri, Safa Mannai, Lotfi Bitri
In this study, phycocyanin (Pc) extracted from Spirulina platensis was used to evaluate its antioxidants effects after ischemia/reperfusion injury (IRI) using the ex-vivo model of isolated perfused rat liver. The rats were divided into eight groups : Control group, where livers were directly perfused after their removal; Cold Ischemia group (CI), livers were treated in the same way as the control group, except that after their collection, they were stored for 12 h and 24 h in the Krebs Henseleit (KH) preservation solution at 4 °C and Treated group (PHY), livers were preserved in the same way as the preceding group except that the KH solution was enriched with phycocyanin at two different concentrations...
March 17, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29535334/organ-specific-responses-during-brain-death-increased-aerobic-metabolism-in-the-liver-and-anaerobic-metabolism-with-decreased-perfusion-in-the-kidneys
#8
A C Van Erp, R A Rebolledo, D Hoeksma, N R Jespersen, P J Ottens, R Nørregaard, M Pedersen, C Laustsen, J G M Burgerhof, J C Wolters, J Ciapaite, H E Bøtker, H G D Leuvenink, B Jespersen
Hepatic and renal energy status prior to transplantation correlates with graft survival. However, effects of brain death (BD) on organ-specific energy status are largely unknown. We studied metabolism, perfusion, oxygen consumption, and mitochondrial function in the liver and kidneys following BD. BD was induced in mechanically-ventilated rats, inflating an epidurally-placed Fogarty-catheter, with sham-operated rats as controls. A 9.4T-preclinical MRI system measured hourly oxygen availability (BOLD-related R2*) and perfusion (T1-weighted)...
March 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29509572/porcine-isolated-liver-perfusion-for-the-study-of-ischemia-reperfusion-injury-a-systematic-review
#9
Francesca Maione, Nicholas Gilbo, Silvia Lazzaro, Peter Friend, Giovanni Camussi, Renato Romagnoli, Jacques Pirenne, Ina Jochmans, Diethard Monbaliu
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 set-ups for ILP and parameters of interest reflecting IRI. RESULTS: ILP was never compared to transplantation in animals...
March 5, 2018: Transplantation
https://www.readbyqxmd.com/read/29496543/%C3%AE-adrenoceptors-activate-hepatic-glutathione-efflux-through-an-unreported-pathway
#10
Deyamira Matuz-Mares, Alain Hernández-Vázquez, Héctor Riveros-Rosas, Raquel Guinzberg, Tania Quesada-López, Alfonso Cárabez-Trejo, Ofelia Mora, Enrique Piña
The physiological regulation of hepatic glutathione efflux by catecholamines is poorly understood. The purpose of this work was to review the role of adrenergic receptors (AR) on total glutathione (GT ) efflux in rat liver. Two models were used: isolated hepatocytes and perfused livers. In hepatocytes 10 μM adrenaline (Adr), but not isoproterenol (Iso) a β-AR agonist, or phenylephrine (Phe) an α1 -AR agonist, (in a Krebs-Henseleit Buffer (KHB) enriched with Ca2+ and some aminoacids) increased in 13% GT efflux...
February 26, 2018: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29455544/heart-failure-affects-liver-morphology-and-function-what-are-the-clinical-implications
#11
E Goncalvesova, M Kovacova
Liver dysfunction in heart failure is common and usually clinically significant, especially in patients with advanced or severe acute heart failure. Lesions are caused by an impaired hepatic circulation due to congestion and hypoperfusion. Congestive lesions are more common and typically manifested by painful hepatomegaly and increased direct bilirubin and alkaline phosphatase. The inferior vena cava and hepatic veins are usually dilated. Congestive lesions are characterized by dilatation of the central vein with fibrotic changes in the surrounding areas on histological examination...
2018: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29436649/interleukin%C3%A2-10-promotes-primary-rat-hepatic-stellate-cell-senescence-by-upregulating-the-expression-levels-of-p53-and-p21
#12
Yue-Hong Huang, Ming-Hua Chen, Qi-Lan Guo, Yun-Xin Chen, Li-Juan Zhang, Zhi-Xin Chen, Xiao-Zhong Wang
Liver fibrosis is characterized by the excessive deposition of extracellular matrix (ECM) components, and activated hepatic stellate cells (HSCs) are a primary source of ECM. Several studies have revealed that the induction of HSC senescence may reduce liver fibrosis. The effect of interleukin‑10 (IL‑10) on the senescence of activated HSCs is not fully understood. Therefore, the present study examined its effects and potential mechanisms in activated primary rat HSCs. Collagenase perfusion and density gradient centrifugation methods were used to isolate rat HSCs...
February 12, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29424767/extracellular-vesicles-from-human-liver-stem-cells-reduce-injury-in-an-ex-vivo-normothermic-hypoxic-rat-liver-perfusion-model
#13
Federica Rigo, Nicola De Stefano, Victor Navarro-Tableros, Ezio David, Giorgia Rizza, Giorgia Catalano, Nicholas Gilbo, Francesca Maione, Federica Gonella, Dorotea Roggio, Silvia Martini, Damiano Patrono, Mauro Salizzoni, Giovanni Camussi, Renato Romagnoli
BACKGROUND: The gold standard for organ preservation before transplantation is static cold storage, which is unable to fully protect suboptimal livers from ischemia/reperfusion injury. An emerging alternative is normothermic machine perfusion (NMP), which permits organ reconditioning. Here, we aimed to explore the feasibility of a pharmacological intervention on isolated rat livers by using a combination of NMP and human liver stem cells-derived extracellular vesicles (HLSC-EV). METHODS: We established an ex vivo murine model of NMP capable to maintain liver function despite an ongoing hypoxic injury induced by hemodilution...
February 9, 2018: Transplantation
https://www.readbyqxmd.com/read/29394753/-multidisciplinary-therapy-for-hepatocellular-carcinoma-with-peritoneal-dissemination
#14
Natsuko Yamauchi, Masahiro Kido, Shohei Komatsu, Motofumi Tanaka, Hisoka Kinoshita, Daisuke Tsugawa, Masafumi Awazu, Kimihiko Ueno, Hirochika Toyama, Sachio Terai, Hideyo Mukubou, Tetsuo Ajiki, Takumi Fukumoto
We report a case of bilobar multiple hepatocellular carcinoma(HCC)with peritoneal dissemination successfullytreated by dual treatment with reductive surgeryplus percutaneous isolated hepatic perfusion(PIHP). A 73-year-old man had sudden abdominal pain and was diagnosed bilobar multiple HCC through some examinations. The abdominal CT scan demonstrated onlya peritoneal dissemination under the liver. We performed partial hepatectomyof the lateral segment and the Spiegel lobe, and resected a peritoneal dissemination...
November 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29356341/cryopreserved-neonatal-hepatocytes-may-be-a-source-for-transplantation-evaluation-of-functionality-toward-clinical-use
#15
Charlotte A Lee, Anil Dhawan, Valeria Iansante, Sharon Lehec, Shirin E Khorsandi, Celine Filippi, Simon Walker, Raquel Fernandez-Dacosta, Nigel Heaton, Sanjay Bansal, Ragai R Mitry, Emer Fitzpatrick
Neonatal livers are a potential source of good-quality hepatocytes for clinical transplantation. We compared viability and function of neonatal hepatocytes (NHs) and adult hepatocytes (AHs) and report their clinical use both intraportally and in alginate microbeads. Following isolation from donor livers, hepatocyte function was assessed using albumin, alpha-1-antitrypsin, and factor VII. Metabolic function was investigated by measuring resorufin conjugation, ammonia metabolism, uridine diphosphate glucuronosyltransferase enzyme activity, and cytochrome P450 (CYP) function following induction...
March 2018: Liver Transplantation
https://www.readbyqxmd.com/read/29355600/mechanisms-of-canalicular-transporter-endocytosis-in-the-cholestatic-rat-liver
#16
Gisel S Miszczuk, Ismael R Barosso, María Cecilia Larocca, Julieta Marrone, Raúl A Marinelli, Andrea C Boaglio, Enrique J Sánchez Pozzi, Marcelo G Roma, Fernando A Crocenzi
Impaired canalicular secretion due to increased endocytosis and intracellular retention of canalicular transporters such as BSEP and MRP2 is a main, common pathomechanism of cholestasis. Nevertheless, the mechanisms governing this process are unknown. We characterized this process in estradiol 17 β-d-glucuronide (E17G)-induced cholestasis, an experimental model which partially mimics pregnancy-induced cholestasis. Inhibitors of clathrin-mediated endocytosis (CME) such as monodansylcadaverine (MDC) or K+ depletion, but not the caveolin-mediated endocytosis inhibitors filipin and genistein, prevented E17G-induced endocytosis of BSEP and MRP2, and the associated impairment of activity of these transporters in isolated rat hepatocyte couplets (IRHC)...
April 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29284039/from-in-vivo-to-in-vitro-major-metabolic-alterations-take-place-in-hepatocytes-during-and-following-isolation
#17
Shamir Cassim, Valérie-Ann Raymond, Pascal Lapierre, Marc Bilodeau
The liver plays a key role in maintaining physiological homeostasis and hepatocytes are largely responsible for this. The use of isolated primary hepatocytes has become an essential tool for the study of nutrient physiology, xenobiotic metabolism and several liver pathologies. Since hepatocytes are removed from their normal environment, the isolation procedure and in vitro culture of primary hepatocytes is partially known to induce undesired metabolic changes. We aimed to perform a thorough metabolic profiling of primary cells before, during and after isolation using state-of-the-art techniques...
2017: PloS One
https://www.readbyqxmd.com/read/29243095/ca-2-camkk%C3%AE-pathway-is-required-for-adiponectin-induced-secretion-in-rat-submandibular-gland
#18
Chong Ding, Zhi-Hao Du, Sheng-Lin Li, Li-Ling Wu, Guang-Yan Yu
Adiponectin functions as a promoter of saliva secretion in rat submandibular gland via activation of adenosine monophosphate-activated protein kinase (AMPK) and increased paracellular permeability. Ca2+ mobilization is the primary signal for fluid secretion in salivary acinar cells. However, whether intracellular Ca2+ mobilization is involved in adiponectin-induced salivary secretion is unknown. Here, we found that full-length adiponectin (fAd) increased intracellular Ca2+ and saliva secretion in submandibular glands...
February 2018: Journal of Molecular Histology
https://www.readbyqxmd.com/read/29235526/plasma-acylcarnitine-concentrations-reflect-the-acylcarnitine-profile-in-cardiac-tissues
#19
Marina Makrecka-Kuka, Eduards Sevostjanovs, Karlis Vilks, Kristine Volska, Unigunde Antone, Janis Kuka, Elina Makarova, Osvalds Pugovics, Maija Dambrova, Edgars Liepinsh
Increased plasma concentrations of acylcarnitines (ACs) are suggested as a marker of metabolism disorders. The aim of the present study was to clarify which tissues are responsible for changes in the AC pool in plasma. The concentrations of medium- and long-chain ACs were changing during the fed-fast cycle in rat heart, muscles and liver. After 60 min running exercise, AC content was increased in fasted mice muscles, but not in plasma or heart. After glucose bolus administration in fasted rats, the AC concentrations in plasma decreased after 30 min but then began to increase, while in the muscles and liver, the contents of medium- and long-chain ACs were unchanged or even increased...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29230490/pharmacokinetic-study-of-tianeptine-and-its-active-metabolite-mc5-in-rats-following-different-routes-of-administration-using-a-novel-liquid-chromatography-tandem-mass-spectrometry-analytical-method
#20
Małgorzata Szafarz, Agnieszka Wencel, Krzysztof Pociecha, Filip A Fedak, Piotr Wlaź, Elżbieta Wyska
Tianeptine is an atypical antidepressant with a unique mechanism of action and recently it has been also reported that its major metabolite, compound MC5, possesses pharmacological activity similar to that of the parent drug. The current study aims to investigate the pharmacokinetics (PK) of both tianeptine and MC5 after intravenous or intraperitoneal administration of the parent drug as well as the metabolic ratio of MC5 in rats. To achieve these goals an LC-MS/MS method using the small sample volume for the quantitation of tianeptine and its active metabolite MC5 in rat plasma and liver perfusate has been developed and validated...
February 2018: Naunyn-Schmiedeberg's Archives of Pharmacology
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