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Hepatic ischemia reperfusion

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https://www.readbyqxmd.com/read/28543181/loss-of-l-selectin-guided-cd8-but-not-cd4-cells-protects-against-ischemia-reperfusion-injury-in-a-steatotic-liver
#1
Vasantha L Kolachala, Sirish Palle, Ming Shen, Alayna Feng, Dmitry Shayakhmetov, Nitika A Gupta
BACKGROUND & AIMS: Steatotic liver responds with increased hepatocellular injury when exposed to an ischemic-reperfusion insult. Increasing evidence supports the role of immune cells as key mediators of this injury in a normal (lean) state, but data about their role in a steatotic liver are practically non-existent. The objective of the current study was to delineate contribution of specific phenotypes of T cells and adhesion molecules in exacerbated cell death in steatotic liver injury...
May 20, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28538623/impact-of-a-novel-pi3-kinase-inhibitor-in-preventing-mitochondrial-dna-damage-and-damage-associated-molecular-pattern-accumulation-results-from-the-biochronicity-project
#2
George E Black, Kyle K Sokol, Donald M Moe, Jon Simmons, David Muscat, Victor Pastukh, Gina Capley, Olena Gorodnya, Mykhalo Ruchko, Mark B Roth, Mark Gillespie, Matthew J Martin
BACKGROUND: Despite improvements in the management of severely injured patients, development of multiple organ dysfunction syndrome (MODS) remains a morbid complication of traumatic shock. One of the key attributes of MODS is a profound bioenergetics crisis, for which the mediators and mechanisms are poorly understood. We hypothesized that metabolic uncoupling using an experimental PI3-kinase inhibitor, LY294002 (LY), may prevent mitochondrial abnormalities that lead to the generation of mitochondrial DNA (mtDNA) damage and the release of mtDNA damage associated molecular patterns (DAMPs) METHODS: 16 swine were studied using LY294002 (LY), a non-selective PI3-KI: Animals were assigned to Trauma only (TO, N=3); LY drug only (LYO, N=3); and Experimental (N=10), trauma + drug (LY+T) groups...
May 22, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28521244/cholecystokinin-protects-mouse-liver-against-ischemia-and-reperfusion-injury
#3
Ying Zhang, Jiali Zhu, Long Guo, Yun Zou, Fang Wang, Han Shao, Jinbao Li, Xiaoming Deng
BACKGROUND: Cholecystokinin (CCK), as a gastrointestinal hormone, has an important protective role against sepsis or LPS-induced endotoxic shock. We aim to address the role of CCK in hepatic ischemia followed by reperfusion (I/R) injury. MATERIALS AND METHODS: A murine model of 60min partial hepatic ischemia followed by 6h of reperfusion was used in this study. CCK and CCKAR Levels in blood and liver were detected at 3h, 6h, 12h and 24h after reperfusion. Then the mice were treated with CCK or proglumide, a nonspecific CCK-receptor (CCK-R) antagonist...
May 15, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28520579/the-use-of-an-acellular-oxygen-carrier-in-a-human-liver-model-of-normothermic-machine-perfusion
#4
Richard W Laing, Ricky H Bhogal, Lorraine Wallace, Yuri Boteon, Desley A H Neil, Amanda Smith, Barney T F Stephenson, Andrea Schlegel, Stefan G Hübscher, Darius F Mirza, Simon C Afford, Hynek Mergental
BACKGROUND: Normothermic machine perfusion of the liver (NMP-L) is a novel technique that preserves liver grafts under near-physiological conditions whilst maintaining their normal metabolic activity. This process requires an adequate oxygen supply, typically delivered by packed red blood cells (RBC). We present the first experience using an acellular hemoglobin-based oxygen carrier (HBOC) Hemopure in a human model of NMP-L. METHODS: Five discarded high-risk human livers were perfused with HBOC-based perfusion fluid and matched to 5 RBC-perfused livers...
May 18, 2017: Transplantation
https://www.readbyqxmd.com/read/28515911/expression-of-tubulin-folding-cofactor-b-in-mouse-hepatic-ischemia-reperfusion-injury
#5
Jianhua Gong, Junyi Wang, Yu Tian, Jing Zhang, Wenjin Liang, Zeming Li, Jidong Yu, Bo Tang, Songqing He
The aim of the present study was to investigate the association between tubulin folding cofactor B (TBCB) expression and ischemia-reperfusion injury (IRI) in mice. A total of 48 C57BL/6 mice were randomly divided into a control group (Sham, n=6) and an ischemia-reperfusion group (n=42). The ischemia-reperfusion group was further divided into 6 subgroups as per different times after reperfusion (2, 4, 6, 8, 12 and 24 h), with 7 mice per subgroup. A hepatic IRI model was established in mice by clamping the hepatic hilum...
May 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28495528/hepatic-ischemia-reperfusion-injury-disrupts-the-homeostasis-of-kidney-primary-cilia-via-oxidative-stress
#6
Sang Jun Han, Hee-Seong Jang, Sung Young Seu, Hee-Jung Cho, Yoon Jin Hwang, Jee In Kim, Kwon Moo Park
Acute kidney injury (AKI) is a major complication of hepatic surgeries. The primary cilium protrudes to the lumen of kidney tubules and plays an important role in renal functions. Disruption of primary cilia homeostasis is highly associated with human diseases including AKI. Here, we investigated whether transient hepatic ischemia induces length change and deciliation of kidney primary cilia, and if so, whether reactive oxygen species (ROS)/oxidative stress regulates those. HIR induced damages to the liver and kidney with increases in ROS/oxidative stress...
May 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28489274/ultrasound-imaging-based-on-molecular-targeting-for-quantitative-evaluation-of-hepatic-ischemia-reperfusion-injury
#7
Chen Qiu, Tinghui Yin, Yingcai Zhang, Yufan Lian, Yujia You, Kun Wang, Rongqin Zheng, Xintao Shuai
The present study aimed to quantitatively diagnose and monitor the therapy response of hepatic ischemia reperfusion injury (IRI) with targeted ultrasound (US) imaging. Targeted microbubbles (MBs ) were fabricated, and the binding of ICAM-1 antibodies to MBs was observed. To establish a quantitative method based on targeted US imaging, contrast-enhanced ultrasound (CEUS) was applied on IRI rats. After andrographolide treatment, the IRI rats were subjected to the quantitative targeted US imaging for a therapeutic effect...
May 10, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28466106/augmenter-of-liver-regeneration-regulates-autophagy-in-renal-ischemia-reperfusion-injury-via-the-ampk-mtor-pathway
#8
Tao Pu, Xiao-Hui Liao, Hang Sun, Hui Guo, Xiao Jiang, Jun-Bo Peng, Ling Zhang, Qi Liu
Autophagy may have protective effects in renal ischemia-reperfusion (I/R) injury, although the underlying mechanisms remain unclear. Augmenter of liver regeneration (ALR), a widely distributed multifunctional protein that is originally identified as a hepatic growth factor, may participate in the process of autophagy. To investigate the role of ALR in autophagy, ALR expression is knocked-down in human kidney 2 (HK-2) cells with short hairpin RNA lentivirals. Then, the level of autophagy is measured in the shRNA/ALR group and the shRNA/control group in an in vitro model of ischemia-reperfusion (I/R)...
May 2, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28465634/new-progress-in-roles-of-nitric-oxide-during-hepatic-ischemia-reperfusion-injury
#9
REVIEW
Ya-Qi Zhang, Ning Ding, Yong-Fen Zeng, Yuan-Yuan Xiang, Mei-Wen Yang, Fen-Fang Hong, Shu-Long Yang
Hepatic ischemia reperfusion injury (HIRI) is a clinical condition which may lead to cellular injury and organ dysfunction. The role of nitric oxide (NO) in HIRI is complicated and inconclusive. NO produced by endothelial nitric oxide synthase (eNOS) activation plays a protective role during early HIRI. But eNOS overexpression and the resulting excessive NO bioavailability can aggravate liver injury. NO induced by inducible nitric oxide synthase (iNOS) may have either a protective or a deleterious effect during the early phase of HIRI, but it may protect the liver during late HIRI...
April 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28457421/later-evaluation-of-ischemia-and-reperfusion-by-the-pringle-maneuver-in-wistar-rats-demonstrating-that-hepatic-lesions-can-be-reversible
#10
G de Lourdes Jorge, R Dos Reis Tártaro, C A Fazzio Escanhoela, I F S F Boin
OBJECTIVE: There has been much research on hepatic ischemia and reperfusion by means of short or longer interruption of the portal triad. The aim of this work was to evaluate the mitochondrial respiratory activity and liver histology at 2 different times after the Pringle maneuver. METHODS: Twenty-eight male Wistar rats, weighing ∼308 g, with histologic and mitochondrial study: immediate ischemic group (IIG; 40 minutes; 9 animals) and late ischemic group (LIG; 28 days; 9 animals)...
May 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28457391/cross-talk-between-sirtuin-1-and-high-mobility-box-1-in-steatotic-liver-graft-preservation
#11
M A Zaouali, A Panisello, A Lopez, E Folch, C Castro-Benítez, R Adam, J Roselló-Catafau
BACKGROUND: Sirtuin 1 (SIRT1) is a nicotinamide adenine dinucleotide +-dependent histone deacetylase that regulates various pathways involved in ischemia-reperfusion injury (IRI). Moreover, high-mobility group box 1 protein (HMGB1) has also been involved in inflammatory processes during IRI. However, the roles of both SIRT1 and HMGB1 in liver preservation is poorly understood. In this communication, we evaluated the potential relationship between SIRT1 and HMGB1 in steatotic and non-steatotic liver grafts preserved in Institute Georges Lopez solution (IGL-1) preservation solution enriched or not enriched with trimetazidine (TMZ)...
May 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28447976/method-of-direct-segmental-intra-hepatic-delivery-using-a-rat-liver-hilar-clamp-model
#12
Eliza W Beal, Curtis Dumond, Jung-Lye Kim, Khalid Mumtaz, Don Hayes, Ken Washburn, Bryan A Whitson, Sylvester M Black
Major hepatic surgery with inflow occlusion, and liver transplantation, necessitate a period of warm ischemia, and a period of reperfusion leading to ischemia/reperfusion (I/R) injury with myriad negative consequences. Potential I/R injury in marginal organs destined for liver transplantation contributes to the current donor shortage secondary to a decreased organ utilization rate. A significant need exists to explore hepatic I/R injury in order to mediate its impact on graft function in transplantation. Rat liver hilar clamp models are used to investigate the impact of different molecules on hepatic I/R injury...
April 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28441386/graft-derived-cell-free-dna-a-noninvasive-early-rejection-and-graft-damage-marker-in-liver-transplantation-a-prospective-observational-multicenter-cohort-study
#13
Ekkehard Schütz, Anna Fischer, Julia Beck, Markus Harden, Martina Koch, Tilo Wuensch, Martin Stockmann, Björn Nashan, Otto Kollmar, Johannes Matthaei, Philipp Kanzow, Philip D Walson, Jürgen Brockmöller, Michael Oellerich
BACKGROUND: Graft-derived cell-free DNA (GcfDNA), which is released into the blood stream by necrotic and apoptotic cells, is a promising noninvasive organ integrity biomarker. In liver transplantation (LTx), neither conventional liver function tests (LTFs) nor immunosuppressive drug monitoring are very effective for rejection monitoring. We therefore hypothesized that the quantitative measurement of donor-derived cell-free DNA (cfDNA) would have independent value for the assessment of graft integrity, including damage from acute rejection...
April 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28426710/change-in-iron-metabolism-in-rats-after-renal-ischemia-reperfusion-injury
#14
Guang-Liang Xie, Lin Zhu, Yan-Min Zhang, Qian-Nan Zhang, Qing Yu
Previous studies have indicated that hepcidin, which can regulate iron efflux by binding to ferroportin-1 (FPN1) and inducing its internalization and degradation, acts as the critical factor in the regulation of iron metabolism. However, it is unknown whether hepcidin is involved in acute renal ischemia/reperfusion injury (IRI). In this study, an IRI rat model was established via right renal excision and blood interruption for 45 min in the left kidney, and iron metabolism indexes were examined to investigate the change in iron metabolism and to analyze the role of hepcidin during IRI...
2017: PloS One
https://www.readbyqxmd.com/read/28418711/silibinin-improves-tnf-%C3%AE-and-m30-expression-and-histological-parameters-in-rat-kidneys-after-hepatic-ischemia-reperfusion
#15
Georgios Kyriakopoulos, Alexandra K Tsaroucha, Georgia Valsami, Maria Lambropoulou, Nikolaos Kostomitsopoulos, Eirini Christodoulou, Zacharias Kakazanis, Constantinos Anagnostopoulos, Christos Tsalikidis, Constantinos E Simopoulos
BACKGROUND: Remote kidney damage is a sequel of hepatic ischemia-reperfusion (I/R) injury. Silibinin is the main ingredient of the milk thistle plant seed extract with known antioxidant and hepatoprotective activity. Our study investigates the nephroprotective potential of intravenously administered silibinin, as a lyophilized SLB-hydoxypropyl-beta-cyclodextrin product, in hepatic I/R injury. MATERIAL AND METHODS: 63 Wistar rats were divided into three groups: Sham (virtual intervention); Control (45 min ischemia and reperfusion); and Silibinin (200 μL intravenous silibinin administration after 45 min of ischemia)...
April 18, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28418287/synergistic-effect-of-ischemic-preconditioning-and-antithrombin-in-ischemia-reperfusion-injury
#16
Georgios Vrakas, Konstantinos Tsalis, Georgios Nikolaos Roidos, Emmanuel Christoforidis, Kokkona Kouzi-Koliakou, Charalampos Lazaridis, Anil Vaidya
OBJECTIVES: Our study aimed to determine whether antithrombin plays a synergistic role in accentuating the effects of intestinal ischemic preconditioning. MATERIALS AND METHODS: Fifty rats were randomly allocated to 5 groups (10 rats/group) as follows: sham treatment (group 1); ischemia-reperfusion (group 2); ischemic preconditioning followed by ischemia-reperfusion (group 3); antithrombin + ischemia-reperfusion, similar to group 2 but including antithrombin administration (group 4); and antithrombin + ischemic preconditioning, similar to group 3 but including antithrombin administration (group 5)...
April 18, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28414974/bilirubin-nanoparticle-preconditioning-protects-against-hepatic-ischemia-reperfusion-injury
#17
Jin Yong Kim, Dong Yun Lee, Sukmo Kang, Wenjun Miao, Hyungjun Kim, Yonghyun Lee, Sangyong Jon
Hepatic ischemia-reperfusion injury (IRI) remains a major concern in liver transplantation and resection, despite continuing efforts to prevent it. Accumulating evidence suggests that bilirubin possesses antioxidant, anti-inflammatory and anti-apoptotic properties. However, despite obvious potential health benefits of bilirubin, its clinical applications are limited by its poor solubility. We recently developed bilirubin nanoparticles (BRNPs) consisting of polyethylene glycol (PEG)-conjugated bilirubin. Here, we sought to investigate whether BRNPs protect against IRI in the liver by preventing oxidative stress...
April 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28411054/salidroside-protects-rat-liver-against-ischemia-reperfusion-injury-by-regulating-the-gsk-3%C3%AE-nrf2-dependent-antioxidant-response-and-mitochondrial-permeability-transition
#18
Linlin Cai, Yonghua Li, Qingqing Zhang, Haijing Sun, Xiaodi Yan, Tong Hua, Qiufeng Zhu, Haitao Xu, Hailong Fu
Salidroside (Sal) is a natural antioxidant that elicits cardioprotective and neuroprotective effects in vivo and in vitro; however, its impact on hepatic ischemia/reperfusion (I/R) injury remains unclear. The purpose of this study was to investigate the hepatoprotective effects of salidroside against segmental (70%) warm hepatic I/R injury in rats. Animals were randomized into Sham, Sham+salidroside pretreatment (Sal), Sham+Sal+carboxyatractyloside (CATR), Sham+CATR, I/R, I/R+Sal, I/R+Sal+CATR and I/R+CATR groups...
April 12, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28407355/extracellular-vesicles-from-bone-marrow-derived-mesenchymal-stem-cells-protect-against-murine-hepatic-ischemia-reperfusion-injury
#19
Hiroaki Haga, Irene K Yan, David Borelli, Akiko Matsuda, Mansi Parasramka, Neha Shukla, David D Lee, Tushar Patel
Hepatic ischemia-reperfusion injury (IRI) and associated inflammation contributes to liver dysfunction and complications after liver surgery and transplantation. Mesenchymal stem cells (MSC) have been reported to reduce hepatic IRI because of their reparative immunomodulatory effects in injured tissues. Recent studies have highlighted beneficial effects of extracellular vesicles from MSCs (MSC-EV) on tissue injury. The effects of systemically administered mouse bone marrow derived MSC-EV were evaluated in an experimental murine model of hepatic IRI induced by cross clamping the hepatic artery and portal vein for 90 minutes followed by reperfusion for periods of upto 6 hours...
April 13, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28403531/short-term-effects-of-extracorporeal-graft-rinse-versus-circulatory-graft-rinse-in-living-donor-liver-transplantation-a-prospective-randomized-controlled-trial
#20
Amr M Yassen, Waleed R Elsarraf, Mohamed A Elmorshedi, Mohamed Abdel Wahab, Tarek Salah, Ahmed M Sultan, Ahmed N Elghawalby, Mohamed M Elshobari, Mohamed Elsadany, Khaled Zalata, Usama Shiha
BACKGROUND: Living donor liver transplantation has shorter cold ischemia time, less preservative volume and lower metabolic load compared to transplantation from deceased donors. We investigated the impact of rinsing the graft contents into the systemic circulation on operative course and post-operative outcomes. PATIENTS AND METHODS: Donors had right hepatectomy and grafts were preserved with cold Histidine-Tryptophan-Ketoglutarate solution. On ending portal vein anastomosis, grafts were flushed by patient's portal blood; either through incompletely anastomosed hepatic vein (Extracorporeal Rinse group, EcRg, n=40) or into systemic circulation (Circulatory Rinse group, CRg, n=40)...
April 12, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
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