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I/R injury

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https://www.readbyqxmd.com/read/29053424/l-carnitine-and-potential-protective-effects-against%C3%A2-ischemia-reperfusion-injury-in-noncardiac-organs-from-experimental-data-to-potential-clinical-applications
#1
Azadeh Moghaddas, Simin Dashti-Khavidaki
The mechanism of ischemia-reperfusion (I/R) injury is complex and multifactorial. In this condition, systemic event results in morbidity and mortality in several pathologies, including myocardial infarction, ischemic stroke, acute kidney injury, trauma, and circulatory arrest. Hypoxia over ischemia phase leads to energy imbalance and changes of cellular homeostasis and functional or structural alterations. In addition, during the reperfusion period, some events, including calcium influx, release of intracellular enzymes, and cell membrane integrity breakdown, cause cell death...
October 20, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/29052830/diaphragmatic-rupture-a-single-institution-experience-and-literature-review
#2
Carlo Corbellini, Stefano Costa, Tiberio Canini, Roberta Villa, Ettore Contessini Avesani
BACKGROUND: Diaphragmatic rupture (DR) is a rare and potentially life-threatening event caused by trauma or spontaneously. DR occasionally occurs several months after the injury. Chest X-ray and computed tomography are the most effective diagnostic methods. Delay in DR diagnosis occurs frequently. This study aimed to examine and improve our understanding of the etiology, clinical presentation, and management of DR. METHODS: This study was performed at the Emergency and General Surgery Department of Fondazione I...
September 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29051185/cgmp-elevating-compounds-and-ischemic-conditioning-provide-cardioprotection-against-ischemia-and-reperfusion-injury-via-cardiomyocyte-specific-bk-channels
#3
Sandra Frankenreiter, Piotr Bednarczyk, Angelina Kniess, Nadja Bork, Julia Straubinger, Piotr Koprowski, Antoni Wrzosek, Eva Mohr, Angela Logan, Michael P Murphy, Meinrad Gawaz, Thomas Krieg, Adam Szewczyk, Viacheslav O Nikolaev, Peter Ruth, Robert Lukowski
Background -The nitric oxide-sensitive guanylyl cyclase (NO-GC)/cyclic guanosine-3',5'-monophosphate (cGMP)/cGMP-dependent protein kinase type I (cGKI)-signaling pathway can afford protection against the ischemia and reperfusion (I/R) injury that occurs during myocardial infarction (MI). Reportedly, voltage and Ca(2+)-activated K(+) channels of the BK-type are stimulated by cGMP/cGKI and recent ex-vivo studies implicated that increased BK activity favors the survival of the myocardium at I/R. It remains unclear, however, whether the molecular events downstream of cGMP involve BK channels present in cardiomyocytes (CMs) or in other cardiac cell types...
October 19, 2017: Circulation
https://www.readbyqxmd.com/read/29050480/the-effect-of-leptin-and-resveratrol-on-jak-stat-pathways-and-sirt-1-gene-expression-in-the-renal-tissue-of-ischemia-reperfusion-induced-rats
#4
S Erkasap, N Erkasap, B Bradford, L Mamedova, O Uysal, M Ozkurt, R Ozyurt, O Kutlay, B Bayram
OBJECTIVE: Our study aimed to investigate the possible modifying effects of leptin and combined use of resveratrol on rat renal I/R injury and their relationship on signal pathways and apoptosis-related mechanisms. BACKGROUND: Renal ischemia-reperfusion (I/R) injury is an important cause of acute renal failure. METHODS: Male Sprague Dawley rats were divided into 5 groups: Control, I/R, I/R+leptin, I/R+resveratrol and I/R+leptin+resveratrol...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29050383/early-detection-of-consciousness-in-patients-with-acute-severe-traumatic-brain-injury
#5
Brian L Edlow, Camille Chatelle, Camille A Spencer, Catherine J Chu, Yelena G Bodien, Kathryn L O'Connor, Ronald E Hirschberg, Leigh R Hochberg, Joseph T Giacino, Eric S Rosenthal, Ona Wu
See Schiff (doi:10.1093/awx209) for a scientific commentary on this article. Patients with acute severe traumatic brain injury may recover consciousness before self-expression. Without behavioural evidence of consciousness at the bedside, clinicians may render an inaccurate prognosis, increasing the likelihood of withholding life-sustaining therapies or denying rehabilitative services. Task-based functional magnetic resonance imaging and electroencephalography techniques have revealed covert consciousness in the chronic setting, but these techniques have not been tested in the intensive care unit...
September 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29050313/adipose-derived-mesenchymal-stem-cells-employed-exosomes-to-attenuate-aki-ckd-transition-through-tubular-epithelial-cell-dependent-sox9-activation
#6
Fengming Zhu, Octavia L S Chong Lee Shin, Guangchang Pei, Zhizhi Hu, Juan Yang, Han Zhu, Meng Wang, Jingyi Mou, Jie Sun, Yuxi Wang, Qian Yang, Zhi Zhao, Huzi Xu, Hui Gao, Weiqi Yao, Xiao Luo, Wenhui Liao, Gang Xu, Rui Zeng, Ying Yao
Acute kidney injury (AKI) predisposes patients to an increased risk into progressive chronic kidney disease (CKD), however effective treatments are still elusive. This study aimed to investigate the therapeutic efficacy of human adipose-derived MSCs (hAD-MSCs) in the prevention of AKI-CKD transition, and illuminate the role of Sox9, a vital transcription factor in the development of kidney, in this process. C57BL/6 mice were subjected to unilateral renal ischemia/reperfusion (I/R) with or without hAD-MSC treatment...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29047162/baicalin-protects-h9c2-cardiomyocytes-against-hypoxia-reoxygenation-induced-apoptosis-and-oxidative-stress-through-activation-of-mitochondrial-aldehyde-dehydrogenase-2
#7
Wen-Bin Jiang, Wei Zhao, Hao Chen, You-Yang Wu, Yi Wang, Guo-Sheng Fu, Xiang-Jun Yang
Baicalin, a flavonoid glycoside separated from Scutellaria baicalensis, has cardioprotection against ischemia/reperfusion (I/R) injury. Mitochondrial aldehyde dehydrogenase 2 (ALDH2) is considered as an endogenous protective mechanism against I/R injury depending on its antioxidant and antiapoptotic characteristics. Herein, the present study demonstrate whether ALDH2 contributes to the cardioprotection of baicalin against hypoxia/reoxygenation (H/R)-inudced H9c2 cardiomyocytes injury. Our results observed that H/R treatment resulted in a significant decrease in cells viability and obvious increases in caspase-3 activity and apoptosis rate in H9c2 cells, while these alterations were evidently reversed by baicalin pretreatment...
October 19, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29045610/high-sensitivity-cardiac-troponin-i-and-risk-of-heart-failure-in-patients-with-suspected-acute-coronary-syndrome-a-cohort-study
#8
Dominik Stelzle, Anoop S V Shah, Atul Anand, Fiona E Strachan, Andrew R Chapman, Martin A Denvir, Nicholas L Mills, David A McAllister
Aims: Heart failure may occur following acute myocardial infarction, but with the use of high-sensitivity cardiac troponin assays we increasingly diagnose patients with minor myocardial injury. Whether troponin concentrations remain a useful predictor of heart failure in patients with acute coronary syndrome is uncertain. Methods and results: We identified all consecutive patients (n = 4748) with suspected acute coronary syndrome (61 ± 16 years, 57% male) presenting to three secondary and tertiary care hospitals...
July 19, 2017: European Heart Journal. Quality of Care & Clinical Outcomes
https://www.readbyqxmd.com/read/29045568/loss-of-protein-kinase-novel-1-pkn1-is-associated-with-mild-systolic-and-diastolic-contractile-dysfunction-increased-phospholamban-thr17-phosphorylation-and-exacerbated-ischaemia-reperfusion-injury
#9
Asvi A Francois, Kofo Obasanjo-Blackshire, James E Clark, Andrii Boguslavskyi, Mark R Holt, Peter Parker, Michael S Marber, Richard J Heads
Aims: PKN1 is a stress-responsive protein kinase acting downstream of small GTP-binding proteins of the Rho/Rac family. The aim was to determine its role in endogenous cardioprotection. Methods and Results: Hearts from PKN1 knockout (KO) or wild type (WT) littermate control mice were perfused in Langendorff mode and subjected to global ischemia and reperfusion (I/R). Myocardial infarct size was doubled in PKN1 KO hearts compared to WT hearts. PKN1 was basally phosphorylated on the activation loop Thr778 PDK1 target site which was unchanged during I/R...
October 16, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29044621/protective-roles-of-hepatic-gamma-aminobutyric-acid-signaling-in-acute-ethanol-exposure-induced-liver-injury
#10
Shuanglian Wang, Shaofeng Sui, Zhiyan Liu, Cheng Peng, Jia Liu, Dan Luo, Xinhuan Fan, Chuanyong Liu, Wei-Yang Lu
Alcoholic liver disease (ALD) is a consequence of heavy and prolonged alcohol consumptions. We previously demonstrated a hepatic gamma-aminobutyric acid (GABA) signaling system that protects the liver from toxic injury. The present study was designed to investigate the role of the hepatic GABA signaling system in the process of acute ethanol exposure-induced liver injury. Our results showed that the expression of GABA synthesizing enzyme glutamic acid decarboxylase and type A GABA receptor (GABAA R) subunits was upregulated in ethanol-treated mice compared with saline-treated controls...
October 17, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29042291/micrornas-as-biomarkers-for-liver-injury-current-knowledge-challenges-and-future-prospects
#11
REVIEW
Haixia Lin, Laura E Ewing, Igor Koturbash, Bill J Gurley, Isabelle R Miousse
MicroRNAs (miRNAs) are short regulatory RNAs that are involved in various biological processes that regulate gene expression posttranscriptionally. Changes in miRNA expression can be detected in many physiological and pathological events, such as liver injury. Drug induced liver injury is a life threatening condition that frequently requires organ transplantation. Hepatotoxicity is also one of the major causes of drug failure in clinical trials and of drug withdrawal from the market. The profiling of miRNA expression shows great promise in monitoring liver injury, in the prediction of outcome in patients, and in the identification of liver-reactive compounds in toxicological assessment...
October 14, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29040168/failure-of-isoflurane-cardiac-preconditioning-in-obese-type-2-diabetic-mice-involves-aberrant-regulation-of-microrna-21-endothelial-nitric-oxide-synthase-and-mitochondrial-complex-i
#12
Zhi-Dong Ge, Yingchuan Li, Shigang Qiao, Xiaowen Bai, David C Warltier, Judy R Kersten, Zeljko J Bosnjak, Mingyu Liang
BACKGROUND: Diabetes impairs the cardioprotective effect of volatile anesthetics, yet the mechanisms are still murky. We examined the regulatory effect of isoflurane on microRNA-21, endothelial nitric-oxide synthase, and mitochondrial respiratory complex I in type II diabetic mice. METHODS: Myocardial ischemia/reperfusion injury was produced in obese type 2 diabetic (db/db) and C57BL/6 control mice ex vivo in the presence or absence of isoflurane administered before ischemia...
October 17, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29039526/promoting-effects-of-il%C3%A2-23-on-myocardial-ischemia-and-reperfusion-are-associated-with-increased-expression-of-il%C3%A2-17a-and-upregulation-of-the-jak2%C3%A2-stat3-signaling-pathway
#13
Yanxi Liao, Xiaorong Hu, Xin Guo, Bofang Zhang, Weipan Xu, Hong Jiang
Interleukin (IL)‑23, as a novel pro‑inflammatory cytokine, is important in several inflammatory diseases, including myocardial ischemia and reperfusion (I/R) injury, however, the underlying mechanism remains to be elucidated. The present study was designed to investigate the specific role of IL‑23 in myocardial I/R injury, and whether the Janus kinase 2/signal transducer and activator of transcription 3 (JAK2‑STAT3) signaling pathway, one of the important downstream signaling pathways of IL‑23, and the IL‑17A downstream pro‑inflammatory cytokine, were involved...
October 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29039497/edaravone-protects-the-retina-against-ischemia-reperfusion%C3%A2-induced-oxidative-injury-through-the-pi3k-akt-nrf2-pathway
#14
Yi-Pin Xu, Fang Han, Jian Tan
Retinal ischemia/reperfusion (I/R) injury can occur as a result of a number of ocular diseases or ischemic events in the brain, leading to possible vision loss if not treated properly. The overproduction of reactive oxygen species is important in the process of I/R injury. Edaravone, a free radical scavenger, has been demonstrated to have a neuroprotective effect in cerebral ischemia; however, its effect against retinal I/R injury remains to be fully elucidated. Therefore, the present study investigated the effects of edaravone on the oxidative parameters, retinal inflammation and apoptosis induced by I/R injury, and treated photoreceptor‑derived 661W cells with hydrogen peroxide (H2O2) and edaravone to examine the underlying mechanism...
October 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29039449/crosstalk-between-tlr2-and-sphk1-in-microglia-in-the-cerebral-ischemia-reperfusion-induced-inflammatory-response
#15
Wei Sun, Zhaoming Ding, Shengjie Xu, Zhiqiang Su, Hulun Li
Stroke is associated with high morbidity and mortality, and much remains unknown about the injury-related mechanisms that occur following reperfusion. This study aimed to explore the roles of Toll-like receptor 2 (TLR2) and sphingosine kinase 1 (Sphk1) in microglial cells in inflammatory responses induced by cerebral ischemia/reperfusion (I/R). For this purpose, C57BL/6 mice were randomly divided into 4 groups as follows: the sham-operated group, the I/R group, the I/R group treated with TLR2 antibody, and the I/R group treated with N,N-dimethylsphingosine...
September 29, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29039206/oxidative-stress-in-ischemia-and-reperfusion-current-concepts-novel-ideas-and-future-perspectives
#16
Christoph Sinning, Dirk Westermann, Peter Clemmensen
Oxidative stress remains a major contributor to myocardial injury after ischemia followed by reperfusion (I/R) as the reperfusion of the myocardial infarction (MI) area inevitably leads to a cascade of I/R injury. This review focused on concepts of the antioxidative defense system and elucidates recent research using antioxidants like vitamin C, E and β-carotene or essential trace elements to activate compounds of antioxidative pathways in the circulation. In this context, important defense mechanisms like superoxide dismutase and glutathione peroxidase will be described...
October 17, 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/29037123/ultrafine-particles-exposure-reveals-the-importance-of-foxo1-notch-activation-complex-for-vascular-regeneration
#17
Kyung In Baek, Rene R Packard, Jefferey J Hsu, Arian Saffari, Zhao Ma, Anh Phuong Luu, Andrew Pietersen, Hilary Yen, Bin Ren, Yichen Ding, Constantinos Sioutas, Rongsong Li, Tzung K Hsiai
AIMS: Redox active ultrafine particles (UFP,<i> d</i> < 0.2 µm) promote vascular oxidative stress and atherosclerosis. Notch signaling is intimately involved in vascular homeostasis, in which FOXO1 acts a co-activator of the Notch activation complex. We elucidated the importance of FOXO1/Notch transcriptional activation complex to restore vascular regeneration following UFP exposure. RESULTS: In a zebrafish model of tail injury and repair, transgenic <i>Tg(fli1:GFP) </i>embryos developed vascular regeneration at 3 days post tail amputation, whereas UFP exposure impaired regeneration (<i>P</i> < 0...
October 17, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29036796/intestinal-ischemia-reperfusion-leads-to-early-systemic-micro-rheological-and-multiorgan-microcirculatory-alterations-in-the-rat
#18
Anita Mester, Zsuzsanna Magyar, Viktoria Sogor, Bence Tanczos, Yoav Stark, Konstantin Cherniavsky, Laszlo Bidiga, Katalin Peto, Norbert Nemeth
BACKGROUND: Intestinal ischemia-reperfusion (I/R) is a potentially life-threatening situation and its pathomechanism is not fully understood yet. OBJECTIVE: To investigate the early micro-rheological, microcirculatory and morphological consequences of intestinal I/R in a rat model. METHODS: CD rats were anesthetized and subjected to Control (n = 7) or I/R (n = 7) groups. Left femoral artery cannulation and median laparotomy were performed...
October 7, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29035876/hydrogen-gas-attenuates-myocardial-ischemia-reperfusion-injury-independent-of-postconditioning-in-rats-by-attenuating-endoplasmic-reticulum-stress-induced-autophagy
#19
Yunan Gao, Hongxiao Yang, Jing Chi, Qiannan Xu, Luqi Zhao, Weijia Yang, Weifan Liu, Wei Yang
BACKGROUND/AIMS: To study the effect of inhaling hydrogen gas on myocardial ischemic/reperfusion(I/R) injury in rats. METHODS: Seventy male Wistar albino rats were divided into five groups at random as the sham group (Sham). The I/R group (I/R), The ischemic postconditioning group (IPo), The I/R plus hydrogen group (IH2) and the ischemic postconditioning plus hydrogen group (IPoH2). The Sham group was without coronary occlusion. In I/R group, Ischemic/reperfusion injury was induced by coronary occlusion for 1 hour...
October 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29034199/cardioprotective-effects-of-achillea-wilhelmsii-on-the-isolated-rat-heart-in-ischemia-reperfusion
#20
M Mahmoudabady, M Lashkari, S Niazmand, M Soukhtanloo
CONTEXT: There are some reports about protective effects of Achillea on the heart. OBJECTIVE: We investigated the effect of Achillea wilhelmsii extract on cardiac function during ischemia-reperfusion (I/R) injury in the isolated rat heart. MATERIALS AND METHODS: 60 male Wistar rats were randomly divided into 6 groups; 1: Control group, 2: Control-ischemia (CI) 3: vitamin C (10 mg/kg), 4-6: Extract groups (E 100, E 200 and E 400 mg/kg). The animals received normal saline, vitamin C or A...
October 2017: Journal of Traditional and Complementary Medicine
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