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Hepatic ischemia reperfusion

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https://www.readbyqxmd.com/read/28220319/cfd-assessment-of-the-effect-of-convective-mass-transport-on-the-intracellular-clearance-of-intracellular-triglycerides-in-macrosteatotic-hepatocytes
#1
Gabriel Yarmush, Lucas Santos, Joshua Yarmush, Srivathsan Koundinyan, Mubasher Saleem, Nir I Nativ, Martin L Yarmush, Francois Berthiaume, Timothy J Maguire, Chris Guaghan
Donor livers available to transplant for patients with end-stage liver disease are in severe shortage. One possible avenue to expand the donor pool is to recondition livers that would be otherwise discarded due to excessive fat content. Severely steatotic livers (also known as fatty livers) are highly susceptible to ischemia-reperfusion injury and as a result, primary liver non-function post-transplantation. Prior studies in isolated perfused rat livers suggest that "defatting" may be possible in a timeframe of a few hours; thus, it is conceivable that fatty liver grafts could be recovered by machine perfusion to clear stored fat from the organ prior to transplantation...
February 20, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28219600/tert-butylhydroquinone-protects-liver-against-ischemia-reperfusion-injury-in-rats-through-nrf2-activating-anti-oxidative-activity
#2
X-P Zeng, X-J Li, Q-Y Zhang, Q-W Liu, L Li, Y Xiong, C-X He, Y-F Wang, Q-F Ye
BACKGROUND: Hepatic ischemia/reperfusion (I/R) injury is a serious complication that occurs in surgical operations such as hepatectomy and liver transplantation. NF-E2-related factor 2 (Nrf2) is a transcription factor that has been proven against inflammatory and oxidative injury. Tert-butylhydroquinone (tBHQ), a widely used Nrf2 activator, is a common food preservative. In this study, we attempt to investigate the potential protective role of tBHQ in hepatic I/R injury. METHODS: Twenty adult male rats were randomly divided into four groups: (1) sham+vehicle group; (2) I/R+vehicle group; (3) sham+tBHQ group; and (4) I/R+tBHQ group...
March 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28216619/15-deoxy-%C3%AE-12-14-prostaglandin-j2-alleviates-hepatic-ischemia-reperfusion-injury-in-mice-via-inducing-antioxidant-response-and-inhibiting-apoptosis-and-autophagy
#3
Kan Chen, Jing-Jing Li, Sai-Nan Li, Jiao Feng, Tong Liu, Fan Wang, Wei-Qi Dai, Yu-Jing Xia, Jie Lu, Ying-Qun Zhou, Chuan-Yong Guo
Hepatic ischemia-reperfusion (I/R) injury is a common clinical impairment that occurs in many circumstances and leads to poor prognosis. Both apoptosis and autophagy have been shown to contribute to cell death in hepatic I/R injury. 15-Deoxy-Δ(12,14)-prostaglandin J2 (15d-PGJ2) is one of the best-studied anti-inflammatory prostaglandins, which has been verified to exert anti-inflammatory and cell-protective functions in various types of cells and animal models. In this study we explored the effects of 15d-PGJ2 on both apoptosis and autophagy in mouse hepatic I/R injury and its possible mechanisms...
February 20, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28213273/2-methoxyestradiol-protects-against-ischemia-reperfusion-injury-in-alcoholic-fatty-liver-by-enhancing-sirtuin-1-mediated-autophagy
#4
Hong-Ik Cho, Min-Jong Seo, Sun-Mee Lee
Alcoholic fatty liver (AFL) is susceptible to ischemia/reperfusion (I/R) injury, responding with inflammation and extensive hepatocellular damage. Autophagy maintains cellular homeostasis and regulates inflammation and lipid metabolism. 2-Methoxyestradiol (2-ME2), an endogenous metabolite of estradiol, exhibits antioxidant and anti-inflammatory properties. This study examined the cytoprotective mechanisms of 2-ME2 on hepatic I/R in AFL, focusing on autophagy signaling. C57BL/6 mice were fed an ethanol diet (ED) to induce AFL, or a control diet (CD) for 6 weeks, and then subjected to 60 min of ischemia and 5 h of reperfusion...
February 14, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28205545/octreotide-attenuates-acute-kidney-injury-after-hepatic-ischemia-and-reperfusion-by-enhancing-autophagy
#5
Huiping Sun, Shuangfa Zou, Keith A Candiotti, Yanhua Peng, Qinya Zhang, Weiqiang Xiao, Yiyun Wen, Jiao Wu, Jinfeng Yang
Octreotide exerts a protective effect in hepatic ischemia-reperfusion (HIR) injury. However, whether octreotide preconditioning could also reduce acute kidney injury (AKI) after HIR is unknown. This study was designed to investigate the role of octreotide in AKI after HIR. Male Sprague-Dawley rats were pretreated with octreotide or octreotide combined with 3-methyladenine (autophagy inhibitor, 3MA). Plasma creatinine, inflammation markers (e.g., TNF-α and IL-6 etc.), apoptosis, autophagy and phosphorylation of protein kinase B/mammalian target of rapamycin/p70 ribosomal S6 kinase (Akt/mTOR/p70S6K) in the kidney were measured after 60 minutes of liver ischemia and 24 hours of reperfusion for each rat...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28198596/propofol-protects-against-hepatic-ischemia-reperfusion-injury-via-mir-133a-5p-regulating-the-expression-of-mapk6
#6
Wei Hao, Zhi-Hui Zhao, Qing-Tao Meng, Mu-Er Tie, Shao-Qing Lei, Zhong-Yuan Xia
Propofol has been found to play an important role in hepatic ischemia/reperfusion (I/R) injury with the antioxidant effects. However, the molecular mechanism of propofol in hepatic I/R injury has not been fully understood. Male Sprague-Dawley rats were randomly assigned into Sham group, hepatic I/R group, and propofol treatment group. I/R injury was attained by ischemia for 1 h and reperfusion for 2 h. Serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activity were detected. QSG-7701 cells were cultured in hypoxia condition for 15 h and then in reoxygenation condition for 6 h to imitate hypoxia/reoxygenation (H/R) injury in vitro...
February 15, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28188779/inhalation-of-high-concentrations-of-hydrogen-ameliorates-liver-ischemia-reperfusion-injury-through-a2a-receptor-mediated-pi3k-akt-pathway
#7
He Li, Ouyang Chen, Zhouheng Ye, Rongjia Zhang, Huijun Hu, Ning Zhang, Junlong Huang, Wenwu Liu, Xuejun Sun
BACKGROUND AND AIMS: This study explored the hepatoprotection of high concentrations of hydrogen (HCH) inhalation in a mouse hepatic ischemia/reperfusion (I/R) injury model and the potential mechanism. METHODS: To explore the role of the PI3K-Akt pathway in the hepatoprotection of HCH, C57BL/6 mice were randomly divided into five groups: Sham, I/R, I/R+HCH, LY294002 (PI3K inhibitor)+I/R+HCH, and LY+I/R groups. Mice received inhalation of 66.7% hydrogen and 33.3% oxygen for 1h immediately after surgery...
February 8, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28187520/exogenous-vegf-delivery-prior-to-endothelial-precursor-cell-transplantation-in-orthotopic-liver-transplant-induced-hepatic-ischemia-reperfusion-injury
#8
Ding Cao, Menghao Wang, Junhua Gong, Sidong Wei, Jianping Gong, Jinzheng Li
BACKGROUND: Vascular endothelial growth factor (VEGF) promotes angiogenesis in vivo. We hypothesized that exogenous delivery of VEGF prior to bone marrow-derived endothelial precursor cell (EPC) transplantation may improve orthotopic liver transplantation (OLT)-induced hepatic ischemia-reperfusion injury (HIRI). METHODS: OLT between Sprague Dawley donor rats and inbred LEW Wistar recipient rats was performed in six experimental groups to comparatively assess the effects of VEGF gene: an untreated normal control group, a surgical control group, a liposomal control group, a VEGF group receiving only the liposome-encapsulated VEGF plasmid, an EPC group receiving only EPCs, and an EPC+VEGF group receiving the liposome-encapsulated VEGF plasmid followed by EPCs...
February 10, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28153944/involvement-of-glycogen-synthase-kinase-3%C3%AE-in-liver-ischemic-conditioning-induced-cardioprotection-against-myocardial-ischemia-and-reperfusion-injury-in-rats
#9
Shuai Yang, Geoffrey W Abbott, Wei Dong Gao, Jin Liu, Chaozhi Luo, Zhaoyang Hu
Remote ischemic conditioning has been convincingly shown to render the myocardium resistant to a subsequent more severe sustained episode of ischemia. Compared to other organs, little is known regarding the effect of transient liver ischemic conditioning. We proposed the existence cardioprotection induced by remote liver conditioning. Male Sprague Dawley rats were divided into sham-operated, control(CON, no further hepatic intervention) and remote liver ischemic conditioning groups. For liver ischemic conditioning, three cycles of 5min of liver ischemia/reperfusion stimuli were conducted prior to-(liver preconditioning), post-myocardial ischemia (liver postconditioning), or in combination of both (liver preconditioning+liver postconditioning)...
February 2, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28144740/hibernation-reduces-cellular-damage-caused-by-warm-hepatic-ischemia-reperfusion-in-ground-squirrels
#10
Jessica P Otis, Amanda C Pike, Jose R Torrealba, Hannah V Carey
During the hibernation season, livers from 13-lined ground squirrels (Ictidomys tridecemlineatus) are resistant to damage induced by ex vivo, cold ischemia-warm reperfusion (IR) compared with livers from summer squirrels or rats. Here, we tested the hypothesis that hibernation also reduces damage to ground squirrel livers in an in vivo, warm IR model, which more closely resembles complications associated with traumatic injury or surgical interventions. We also examined whether protection is mediated by two metabolites, inosine and biliverdin, that are elevated in ground squirrel liver during interbout arousals...
January 31, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28133883/carbon-monoxide-ameliorates-hepatic-ischemia-reperfusion-injury-via-sirtuin1-mediated-deacetylation-of-hmgb1-in-rats
#11
Jian Sun, Enshuang Guo, Jiankun Yang, Yan Yang, Shenpei Liu, Jifa Hu, Xiaojing Jiang, Olaf Dirsch, Uta Dahmen, Wei Dong, Anding Liu
: Carbon monoxide (CO) exerts protective effects on hepatic ischemia/reperfusion (I/R) injury, but the underlying molecular mechanisms are not fully understood. High mobility group box 1 (HMGB1) is an important mediator of injury and inflammation in hepatic I/R injury. Here, we investigated whether CO could attenuate hepatic I/R injury via inhibition of HMGB1 release, particularly through sirtuin 1 (SIRT1). CO was released by treatment with CO-releasing molecule (CORM)-2. CORM-2-delivered CO ameliorated hepatic I/R injury, as indicated by lower serum aminotransferase levels, lower hepatic inflammatory responses and less severe I/R-associated histopathologic changes...
January 30, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28124458/hepatic-ischemia-reperfusion-injury-associates-with-acute-kidney-injury-in-liver-transplantation-prospective-cohort-study
#12
Ina Jochmans, Nicolas Meurisse, Arne Neirynck, Marleen Verhaegen, Diethard Monbaliu, Jacques Pirenne
: Solid clinical prospective studies investigating the association between hepatic ischemia reperfusion injury and acute kidney injury after liver transplantation are missing. Hepatic ischemia reperfusion injury -reflected by transaminase release- induces acute kidney injury in rodents and retrospective studies suggest a similar association in man. This prospective cohort study determined risk factors for acute kidney injury in 80 adult liver-only recipients. Acute kidney injury -defined by RIFLE-criteria- developed in 21 (26%) recipients at 12 hours postreperfusion [inter quartile range: 6 hours-postoperative day 1]; 13 progressed from "Risk" to "Injury"; 5 to "Failure"...
January 25, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28109981/thyroid-hormone-suppresses-ischemia-reperfusion-induced-liver-nlrp3-inflammasome-activation-role-of-amp-activated-protein-kinase
#13
Romina Vargas, Luis A Videla
Thyroid hormone (T3) induces liver preconditioning (PC) against ischemia-reperfusion (IR), a response energetically supported by AMP-activated protein kinase (AMPK) upregulation. The aim of this work is to evaluate the influence of T3 on IR-induced liver NLRP3 inflammasome activation and the relevance of AMPK activity on liver injury by the use of the AMPK inhibitor compound C (CC). Male Sprague-Dawley rats were given 0.1mgT3/kg (time zero) and 10mg CC/kg (time zero and 24h) or the respective vehicles, and subjected to 1h ischemia-20h reperfusion 48h after hormone treatment...
January 18, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28109023/intraportal-islet-transplantation-the-impact-of-the-liver-micro-environment
#14
REVIEW
Vaihere Delaune, Thierry Berney, Stéphanie Lacotte, Christian Toso
The portal vein remains the preferred site for pancreatic islet transplantation due to its easy access and low morbidity. However, despite great progress in isolation and transplantation protocols over the past few years, it is still associated with the early loss of some 50-70% of transplanted islets. The complex liver micro-environment itself presumably plays an important role in this loss. The present review focuses on the specifics of the liver micro-environment, notably the localized hepatic ischemia/reperfusion injury following transplantation, the low oxygenation of the portal vein, the instant blood mediated inflammatory reaction (IBMIR), the endogenous liver immune system, and the gut-liver axis, and how they can each have an impact on the transplanted islets...
January 21, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28077277/berberine-protects-against-ischemia-reperfusion-injury-after-orthotopic-liver-transplantation-via-activating-sirt1-foxo3%C3%AE-induced-autophagy
#15
Yuanbang Lin, Mingwei Sheng, Yiqi Weng, Rubin Xu, Ning Lu, Hongyin Du, Wenli Yu
The effects and mechanism of berberine (BBR) on hepatic injury after orthotopic liver transplantation (OLT) have not been well characterized. We examined the role of Sirt1/FoxO3α axis in the protective effect of BBR on ischemia/reperfusion injury after OLT. Adult male Wistar rats were randomly allocated into four groups: Sham, OLT, OLT with BBR pretreatment (BBR), OLT with BBR and Sirt1 inhibitor (EX527) pretreatment group (EX527). The liver function and oxidative stress level were measured by biochemical and histopathologic examinations...
January 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28073422/-research-advances-in-the-association-between-deacetylase-sirtuin3-and-liver-diseases
#16
J Yu, C Chen, W X Wang
The deacetylase Sirtuin 3 (SIRT3) is a member of the Sirtuins mainly located in the mitochondrial matrix, and as a nicotinamide adenine dinucleotide (NAD(+))-dependent deacetylase, it can regulate cellular energy metabolism and oxidative stress-related pathways. The liver is the largest solid organ in the human body and plays a very important role in substance metabolism. Based on the features of SIRT3, it is closely associated with the development and progression of certain liver diseases. This article reviews the research advances in the role of SIRT3 in non-alcoholic fatty liver disease, liver cancer, and hepatic ischemia-reperfusion injury...
December 20, 2016: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28073175/post-reperfusion-microcirculatory-derangements-after-liver-transplantation-relationship-to-hemodynamics-serum-mediators-and-outcome
#17
Carlo Pulitano, David Joseph, Charbel Sandroussi, Deborah Verran, Phong Ho, Ashe Debiasio, Adriano Luongo, Geoffrey W McCaughan, Nicholas Shackel, Michael Crawford
INTRODUCTION: Despite the growing data supporting the role of microcirculation in regulating liver function, little of this knowledge has been translated into clinical practice. The aim of this study is to quantify hepatic microcirculation in-vivo using sidestream dark-field (SDF) imaging and correlate these finding with hepatic blood flow, hemodynamic parameters, and soluble mediators. METHODS: Post-reperfusion hepatic microcirculation was assessed using SDF imaging...
January 10, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28062700/intravital-imaging-of-neutrophil-recruitment-reveals-the-efficacy-of-fpr1-blockade-in-hepatic-ischemia-reperfusion-injury
#18
Masaki Honda, Takayuki Takeichi, Shintaro Hashimoto, Daiki Yoshii, Kaori Isono, Shintaro Hayashida, Yuki Ohya, Hidekazu Yamamoto, Yasuhiko Sugawara, Yukihiro Inomata
Neutrophils are considered responsible for the pathophysiological changes resulting from hepatic ischemia-reperfusion (I/R) injury, which is a complication of trauma, shock, liver resection, and transplantation. Recently, evidence is accumulating that formyl-peptide receptor (FPR) signaling constitutes an important danger signal that guides neutrophils to sites of inflammation. This study aimed to investigate dynamic neutrophil recruitment using two-photon laser-scanning microscopy (TPLSM) in response to FPR1 blockade during hepatic I/R...
January 6, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28057548/the-protection-effects-of-1e-6e-1-7-diphenylhepta-1-6-diene-3-5-dione-a-curcumin-analogue-against-operative-liver-injury-in-rats
#19
Xiaowei Chi, Dan Yu, Peijing Li, Qianfeng Lu, Wenjiao Jiang, Kun Hao
The relationship between the chemistry characteristic and the hepatoprotective effects of (1E,6E)-1,7-diphenylhepta-1,6-diene-3,5-dione (DDD), a curcumin analogue, in operative liver injury rats was investigated to reveal the mechanism of hepatic protection effects of DDD. DDD (1.2-4.8mmol/kg) was administrated 10min before reperfusion phase in hepatic ischemia-reperfusion injury (IRI) rats. DDD (4.8mmol/kg) administrated 10min before ischemia and N-acetylcysteine (NAC) (4.8mmol/kg) administrated 10min before reperfusion were included for comparative studies...
January 3, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28049941/caspase-independent-apoptosis-induced-by-reperfusion-following-ischemia-without-bile-duct-occlusion-in-rat-liver
#20
Nobuaki Matsui, Rie Yoshioka, Asako Nozawa, Naonobu Kobayashi, Yukari Shichijo, Tadatoshi Yoshikawa, Masaaki Akagi
The contribution of caspases to hepatic ischemia/reperfusion (I/R)-induced apoptosis has not been completely understood yet. Several studies have demonstrated increased caspase activity during I/R and the protective effect of caspase inhibitors against I/R injuries. However, reports with opposing results also exist. Herein, we examined the contribution of caspases to the I/R-induced hepatic apoptosis in rats using caspase inhibitors and specific substrates of caspases. Hepatic I/R was induced via a 2-h occlusion of the portal vein and the hepatic artery, without conducting bile duct occlusion...
2017: Biological & Pharmaceutical Bulletin
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