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Ischemia reperfusion injury

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https://www.readbyqxmd.com/read/28646508/hepatic-stimulator-substance-resists-hepatic-ischemia-reperfusion-injury-by-regulating-drp1-translocation-and-activation
#1
Chao Zhang, Jing Huang, Wei An
Ischemia-reperfusion injury (IRI), induced by abnormal mitochondrial fission related apoptosis, is a major concern in liver transplantation settings. Our previous studies have demonstrated that hepatic stimulator substance (HSS) is an anti-apoptotic effector and could protect liver from IRI. However, the underlying mechanism remains unclear. In the present study, we report that in vitro and in vivo HSS could regulate mitochondrial fission and hepatocyte apoptosis during liver IRI by orchestrating the translocation and activation of dynamin-related protein 1 (Drp1)...
June 23, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28646120/mir-223-represents-a-biomarker-in-acute-and-chronic-liver-injury
#2
Florian Schueller, Sanchari Roy, Sven Heiko Loosen, Jan Alder, Christiane Koppe, Anne Theres Schneider, Franziska Wandrer, Heike Bantel, Mihael Vucur, Qing-Sheng Mi, Christian Trautwein, Tom Luedde, Christoph Roderburg
Background: Dysregulation of miRNAs has been described in tissue and serum from patients with acute and chronic liver diseases. However, only little information on the role of miR-223 in the pathophysiology of acute liver failure (ALF) and liver cirrhosis is available.  Methods: We analysed cell and tissue specific expression levels as well as serum concentrations of miR-223 in mouse models of acute (hepatic ischemia and reperfusion, single CCl4 injection) and chronic (repetitive CCl4 injection, bile duct ligation) liver diseases...
June 23, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28646026/exosomes-promising-sacks-for-treating-ischemic-heart-disease
#3
Gui-Hao Chen, Jun Xu, Yue-Jin Yang
Ischemic heart disease(IHD) is the leading cause of death worldwide. Despite development of continuously improving therapeutic strategies, morbidity and mortality of patients with IHD remains relatively high. Exosomes are a subpopulation of vesicles that are universally recognized as major mediators in intercellular communication. Numerous preclinical studies showed that these tiny vesicles were protective in IHD, through such actions as alleviating myocardial ischemia/reperfusion injury, promoting angiogenesis, inhibiting fibrosis and facilitating cardiac regeneration...
June 23, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28645651/post-transplant-cholangiopathy-classification-pathogenesis-and-preventive-strategies
#4
REVIEW
Yvonne de Vries, Fien A von Meijenfeldt, Robert J Porte
Biliary complications are the most frequent cause of morbidity, re-transplantation, and even mortality after liver transplantation. In general, biliary leakage and anastomotic and non-anastomotic biliary strictures (NAS) can be recognized. There is no consensus on the exact definition of NAS and different names and criteria have been used in literature. We propose to use the term post-transplant cholangiopathy for the spectrum of abnormalities of large donor bile ducts, that includes NAS, but also intraductal casts and intrahepatic biloma formation, in the presence of a patent hepatic artery...
June 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28645524/orientin-attenuates-cerebral-ischemia-reperfusion-injury-in-rat-model-through-the-aqp-4-and-tlr4-nf-%C3%AE%C2%BAb-tnf-%C3%AE-signaling-pathway
#5
Xiaoru Wang, Fang An, Shulin Wang, Zexin An, Shuhua Wang
BACKGROUND: Orientin has been reported to have extensive pharmaceutical effects of antioxidant, anti-inflammatory, antithrombosis, antiapoptosis, and so on. In the present study, we tried to investigate the protective effects of orientin on cerebral ischemia-reperfusion (I/R) injury and explored the possible mechanisms. METHODS: Middle cerebral artery occlusion rat model was established and then treated with low, middle, and high concentrations of orientin, respectively, with edaravone as a positive control...
June 20, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28645478/a-tspo-ligand-prevents-mitochondrial-sterol-accumulation-and-dysfunction-during-myocardial-ischemia-reperfusion-in-hypercholesterolemic-rats
#6
Julien Musman, Stéphanie Paradis, Mathieu Panel, Sandrine Pons, Caroline Barau, Claudio Caccia, Valerio Leoni, Bijan Ghaleh, Didier Morin
A major cause of cell death during myocardial ischemia-reperfusion is mitochondrial dysfunction. We previously showed that the reperfusion of an ischemic myocardium was associated with an accumulation of cholesterol into mitochondria and a concomitant strong generation of auto-oxidized oxysterols. The inhibition of mitochondrial accumulation of cholesterol abolished the formation of oxysterols and prevented mitochondrial injury at reperfusion. The aim of this study was to investigate the impact of hypercholesterolemia on sterol and oxysterol accumulation in rat cardiac cytosols and mitochondria and to analyse the effect of the translocator protein ligand 4'-chlorodiazepam on this accumulation and mitochondrial function...
June 20, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28645475/usefulness-of-early-treatment-with-melatonin-to-reduce-infarct-size-in-patients-with-st-segment-elevation-myocardial-infarction-receiving-percutaneous-coronary-intervention-from-the-melatonin-adjunct-in-the-acute-myocardial-infarction-treated-with-angioplasty
#7
Alberto Dominguez-Rodriguez, Pedro Abreu-Gonzalez, Jose M de la Torre-Hernandez, Luciano Consuegra-Sanchez, Raffaele Piccolo, Julia Gonzalez-Gonzalez, Tamara Garcia-Camarero, Maria Del Mar Garcia-Saiz, Ana Aldea-Perona, Russel J Reiter
Melatonin, an endogenously produced hormone, might potentially limit the ischemia reperfusion injury and improve the efficacy of mechanical reperfusion with primary percutaneous coronary intervention (pPCI) in ST-segment elevation myocardial infarction (STEMI). This study was aimed to evaluate whether the treatment effect of melatonin therapy in patients with STEMI is influenced by the time to administration. We performed a post hoc analysis of the Melatonin Adjunct in the Acute Myocardial Infarction Treated With Angioplasty trial (NCT00640094), which randomized STEMI patients to melatonin (intravenous and intracoronary bolus) or placebo during pPCI...
May 30, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28645333/sac-1004-a-vascular-leakage-blocker-reduces-cerebral-ischemia-reperfusion-injury-by-suppressing-blood-brain-barrier-disruption-and-inflammation
#8
Haiying Zhang, Joon Ha Park, Sony Maharjan, Jeong Ae Park, Kyu-Sung Choi, Hyojin Park, Yoonjeong Jeong, Ji Hyeon Ahn, In Hye Kim, Jae-Chul Lee, Jeong Hwi Cho, In-Kyu Lee, Choong Hyun Lee, In Koo Hwang, Young-Myeong Kim, Young-Ger Suh, Moo-Ho Won, Young-Guen Kwon
BACKGROUND: Blood-brain barrier (BBB) breakdown and inflammation are critical events in ischemic stroke, contributing to aggravated brain damage. The BBB mainly consists of microvascular endothelial cells sealed by tight junctions to protect the brain from blood-borne substances. Thus, the maintenance of BBB integrity may be a potential target for neuroprotection. Sac-1004, a pseudo-sugar derivative of cholesterol, enhances the endothelial barrier by the stabilization of the cortical actin ring...
June 23, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28645007/activation-of-the-pi3k-akt-pathway-promotes-neuroprotection-of-the-%C3%AE-opioid-receptor-agonist-against-cerebral-ischemia-reperfusion-injury-in-rat-models
#9
Mei-Rong Lv, Bin Li, Ming-Guang Wang, Fan-Guo Meng, Jian-Jun Yu, Feng Guo, Ye Li
The central objective was to identify the role of the PI3K-Akt activation pathway on the neuroprotection of δ-opioid receptor agonist (DADLE) against cerebral ischemia-reperfusion (I/R) injury in a rat model. Fifty-five male Sprague-Dawley (SD) rats were included to establish a middle cerebral artery occlusion (MCAO) model which were then divided into the sham, MCAO, LY294002 (MCAO+DADLE+LY294002 [inhibitor of PI3K-Akt pathway]), DADLE (MCAO+DADLE) and DMSO (MCAO+DADLE+DMSO [dimethyl sulphoxide]) groups. The cerebral infarction (CI) volume and nerve cell apoptosis was determined using TTC and TUNEL staining...
June 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28644844/carbonic-anhydrase-inhibitor-attenuates-ischemia-reperfusion-induced-acute-lung-injury
#10
Chou-Chin Lan, Chung-Kan Peng, Shih-En Tang, Kun-Lun Huang, Chin-Pyng Wu
Ischemia-reperfusion (IR)-induced acute lung injury (ALI) is implicated in several clinical conditions including lung transplantation, cardiopulmonary bypass surgery, re-expansion of collapsed lung from pneumothorax or pleural effusion and etc. IR-induced ALI remains a challenge in the current treatment. Carbonic anhydrase has important physiological function and influences on transport of CO2. Some investigators suggest that CO2 influences lung injury. Therefore, carbonic anhydrase should have the role in ALI...
2017: PloS One
https://www.readbyqxmd.com/read/28644700/intermittent-ischemic-preconditioning-protects-against-hepatic-ischemia-reperfusion-injury-and-extensive-hepatectomy-in-steatotic-rat-liver
#11
Nikolaos Sikalias, Theodore Karatzas, Konstantinos Alexiou, Lamprini Mountzalia, Maria Demonakou, Ioannis D Kostakis, Argyro Zacharioudaki, Apostolos Papalois, Gregory Kouraklis
BACKGROUND: Hepatic steatosis causes severe liver damage and has deleterious effects when associated with ischemia-reperfusion mechanisms. Ischemic preconditioning (IPC) protects lean liver against prolonged ischemia by improving micro-circulation and reducing lipid peroxidation. We investigated the effect of intermittent IPC on liver ischemia-reperfusion injury (IRI) and extensive hepatectomy in severe hepatic steatosis. METHODS: Severe hepatic steatosis was performed by 12-14 weeks of choline-free diet in 108 Wistar rats...
June 23, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28642708/myricitrin-protects-cardiomyocytes-from-hypoxia-reoxygenation-injury-involvement-of-heat-shock-protein-90
#12
Min Wang, Gui-Bo Sun, Yu-Yang Du, Yu Tian, Ping Liao, Xue-Song Liu, Jing-Xue Ye, Xiao-Bo Sun
Modulation of oxidative stress is therapeutically effective in ischemia/reperfusion (I/R) injury. Myricitrin, a naturally occurring phenolic compound, is a potent antioxidant. However, little is known about its effect on I/R injury to cardiac myocytes. The present study was performed to investigate the potential protective effect of myricitrin against hypoxia/reoxygenation (H/R)-induced H9c2 cardiomyocyte injury and its underlying mechanisms. Myricitrin pretreatment improved cardiomyocyte viability, inhibited ROS generation, maintained the mitochondrial membrane potential, reduced apoptotic cardiomyocytes, decreased the caspase-3 activity, upregulated antiapoptotic proteins and downregulated proapoptotic proteins during H/R injury...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28642577/effects-of-chronic-alcohol-exposure-on-ischemia-reperfusion-induced-acute-kidney-injury-in-mice-the-role-of-%C3%AE-arrestin-2-and-glycogen-synthase-kinase-3
#13
Lihua Wang, Yifei Zhu, Lili Wang, Jingjing Hou, Yongning Gao, Lei Shen, Jingyu Zhang
Little is known about the effects of chronic alcohol intake on the outcome of acute kidney injury (AKI). Hence, we examined the effects of chronic alcohol intake on the development of renal fibrosis following AKI in an animal model of bilateral renal ischemia-reperfusion (IR) injury. We first found that chronic alcohol exposure exacerbated bilateral IR-induced renal fibrosis and renal function impairment. This phenomenon was associated with increased bilateral IR-induced extracellular matrix deposition and an increased myofibroblast population as well as increased bilateral IR-induced expression of fibrosis-related genes in the kidneys...
June 23, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28642067/caloric-restriction-protects-livers-from-ischemia-reperfusion-damage-by-preventing-ca-2-induced-mitochondrial-permeability-transition
#14
Sergio L Menezes-Filho, Ignacio Amigo, Fernanda M Prado, Natalie C Ferreira, Marcia K Koike, Isabella F D Pinto, Sayuri Miyamoto, Edna F S Montero, Marisa H G Medeiros, Alicia J Kowaltowski
Caloric restriction (CR) promotes lifespan extension and protects against many pathological conditions, including ischemia/reperfusion injury to the brain, heart and kidney. In the liver, ischemia/reperfusion damage is related to excessive mitochondrial Ca(2+) accumulation, leading to the mitochondrial permeability transition. Indeed, liver mitochondria isolated from animals maintained on CR for 4 months were protected against permeability transition and capable of taking up Ca(2+) at faster rates and in larger quantities...
June 19, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28642043/mitochondrial-cx43-an-important-component-of-cardiac-preconditioning
#15
REVIEW
Antonio Rodríguez-Sinovas, Marisol Ruiz-Meana, Amanda Denuc, David García-Dorado
Connexin 43 (Cx43) forms gap junction channels that are essential for the propagation of electrical depolarization in cardiomyocytes, but also with important roles in the pathophysiology of reperfusion injury. However, more recent studies have shown that Cx43 has also important functions independent from intercellular communication between adjacent cardiomyocytes. Some of these actions have been related to the presence of Cx43 in the mitochondria of these cells (mitoCx43). The functions of mitoCx43 have not been completely elucidated, but there is strong evidence indicating that mitoCx43 modulates mitochondrial respiration at respiratory complex I, production of radical oxygen species and ATP synthesis...
June 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28641140/effect-of-c1-inh-on-ischemia-reperfusion-injury-in-a-porcine-limb-ex-vivo-perfusion-model
#16
Mai M Abdelhafez, Jane Shaw, Damian Sutter, Jonas Schnider, Yara Banz, Hansjörg Jenni, Esther Voegelin, Mihai A Constantinescu, Robert Rieben
Revascularization of an amputated limb within 4-6h is essential to avoid extensive ischemia/reperfusion (I/R) injury leading to vascular leakage, edema and tissue necrosis. I/R injury is a pathological inflammatory condition that occurs during reperfusion of an organ or tissue after prolonged ischemia. It is characterized by a complex crosstalk between endothelial cell activation and the activation of plasma cascades. Vasculoprotective pharmacological intervention to prevent I/R injury might be an option to prolong the time window between limb amputation and successful replantation...
June 19, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28641075/postconditioning-with-intralipid-emulsion-protects-against-reperfusion-injury-in-postinfarct-remodeled-rat-hearts-by-activation-of-ros-akt-erk-signaling
#17
Michael Zaugg, Phing-How Lou, Eliana Lucchinetti, Manoj Gandhi, Alexander S Clanachan
The clinically used lipid emulsion Intralipid (ILE) reduces ischemia reperfusion injury in healthy rodent hearts. We tested whether ILE is cardioprotective in postinfarct remodeled hearts. Postinfarct remodeled and sham Sprague-Dawley rat hearts were perfused in working mode and subjected to ischemia (15 minutes) and reperfusion (30 minutes). Left ventricular (LV) work was measured in hearts that were untreated or that received ILE (1%) postconditioning administered at the onset of reperfusion, or the reactive oxygen species (ROS) scavenger N-(2-mercaptopropionyl)-glycine (10 μM) alone or in combination with ILE...
June 1, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28640790/microrna-155-deficiency-in-kupffer-cells-ameliorates-liver-ischemia-reperfusion-injury-in-mice
#18
Yakun Li, Dongxia Ma, Zhimin Wang, Jun Yang
BACKGROUND: MicroRNA-155 (miR-155) is known to be involved in autoimmune diseases, inflammation, and transplantation. However, its role in a warm hepatic ischemia-reperfusion (IR) model has not been fully elucidated. METHODS: Partial hepatic IR was performed in wild-type and miR-155-deficient mice treated with or without GdCl3, and then the serum transaminase concentration and histology were analyzed. Kupffer cells (KCs) were isolated from the liver after IR, and immunohistochemistry was used to evaluate activation and polarization...
July 2017: Transplantation
https://www.readbyqxmd.com/read/28640063/pharmacodynamic-monitoring-of-tacrolimus-based-immunosuppression-in-cd14-monocytes-after-kidney-transplantation
#19
Nynke M Kannegieter, Dennis A Hesselink, Marjolein Dieterich, Gretchen N De Graav, Rens Kraaijeveld, Ajda T Rowshani, Pieter Jm Leenen, Carla C Baan
BACKGROUND: Monocytes significantly contribute to ischemia reperfusion injury and allograft rejection after kidney transplantation. However, the knowledge about the effects of immunosuppressive drugs on monocyte activation is limited. Conventional pharmacokinetic methods for immunosuppressive drug monitoring are not cell type-specific. In this study, phosphorylation of three signaling proteins was measured to determine the pharmacodynamic effects of immunosuppression on monocyte activation in kidney transplant patients...
June 19, 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28638888/modulation-of-key-biochemical-markers-relevant-to-stroke-by-antiaris-africana-leaf-extract-following-cerebral-ischemia-reperfusion-injury
#20
Omotayo B Ilesanmi, Afolabi C Akinmoladun, Olanrewaju Sam Olayeriju, Ibrahim Olabayode Saliu, M Tolulope Olaleye, Afolabi A Akindahunsi
BACKGROUND: Oxidative stress plays a significant role in stroke pathogenesis. Hence, plants rich in antioxidant phytochemicals have been suggested as effective remedies for prevention and treatment of stroke and other neurological diseases. Antiaris africana Engl. (Moraceae) is traditionally used for the management of brain-related problems but there is paucity of data on its anti-stroke potential. MATERIALS AND METHODS: Ischemia/reperfusion injury was induced by a 30 min bilateral common carotid artery occlusion/ 2 h reperfusion (BCCAO/R) in the brain of male Wistar rats...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
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