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https://www.readbyqxmd.com/read/29778441/hypoxic-postconditioning-enhances-functional-recovery-following-endothelin-1-induced-middle-cerebral-artery-occlusion-in-conscious-rats
#1
Hong L Nguyen, Alexander M Ruhoff, Thomas Fath, Nicole M Jones
Stroke is a leading cause of death and a major contributor to neurological disability in adults. Tissue plasminogen activator is the only approved treatment. However, due to its narrow therapeutic window, <5% of patients receive treatment. Recently, hypoxic postconditioning (HPC) was shown to reduce stroke induced-injury in mice, but the mechanisms and functional outcomes are still unknown. In the current study, male Sprague Dawley rats were subjected to endothelin-1 induced stroke. HPC (8% O2 , 1 h/d for 5d) or normoxia treatments were started 24 h after stroke...
May 17, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29762223/myocardial-postconditioning-by-the-melatonin-receptor-agonist-ramelteon-putting-pieces-to-the-puzzle
#2
Jan Rossaint
No abstract text is available yet for this article.
June 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29738369/cardioprotective-effects-of-metformin
#3
Christine Driver, Kayode Dominion Samuel Bamitale, Aniessa Kazi, Mehnaaz Olla, Annah Ntsoaki Nyane, Peter Mark Oroma Owira
Metformin, routinely used as first-line drug in the treatment of type 2 diabetes has been shown to have cardioprotective effects beyond its glycemic control. These have been attributed to increases in Akt concentrations and activation of protein kinases in the RISK pathways. which prevent the mitochondrial mPTP from opening and rupturing it and therefore protects myocyte viability. In myocardial infarction and subsequent reperfusion, metformin activation of AMPK promotes glycolysis and keeps the mPTP closed...
May 3, 2018: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29737638/preventing-morphine-reinforcement-with-high-frequency-deep-brain-stimulation-of-the-lateral-hypothalamic-area
#4
Mojdeh Fattahi, Ghorbangol Ashabi, Seyed Morteza Karimian, Esmail Riahi
Deep brain stimulation (DBS) has been proposed as a promising intervention for patients with treatment-refractory substance use disorder. Here, we investigated if high-frequency DBS in the lateral hypothalamic area (LHA) could affect drug-induced reinforcement. Rats were bilaterally implanted with bipolar stimulation electrodes in the LHA and trained to the morphine conditioned place preference. DBS (monophasic square pulses, 130 Hz, 100-microsecond pulse duration and 150 μA) was applied during the morphine-pairing trials (30 minutes daily for 4 days) or drug-free postconditioning test (15 minutes) to determine its effect on the acquisition or expression of morphine reward, respectively...
May 8, 2018: Addiction Biology
https://www.readbyqxmd.com/read/29721767/effect-of-sodium-thiosulfate-postconditioning-on-ischemia-reperfusion-injury-induced-mitochondrial-dysfunction-in-rat-heart
#5
Sriram Ravindran, Gino A Kurian
The recent research on the therapeutic applications of sodium thiosulfate (STS) has gained importance in the treatment of cardiovascular diseases. Progressively through the present work, we have demonstrated that postconditioning of isolated rat heart subjected to ischemia-reperfusion injury using STS had preserved the mitochondrial structure, function, and number. Heart comprising of two mitochondrial subpopulations interfibrillar (IFM-involved in contractile function) and subsarcolemmal (SSM-involved in metabolic function), STS postconditioning imparted a state of hypometabolism to SSM, thereby reducing the metabolic demand of the reperfused heart...
May 2, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29670839/effects-of-postconditioning-with-fructose-on-arrhythmias-and-the-size-of-infarct-caused-by-global-ischemia-and-reperfusion-in-isolated-rat-heart
#6
Jila Haghi, Tahereh Eteraf-Oskouei, Moslem Najafi
Purpose: In the present study, postconditioning effect of fructose against ischemia/reperfusion (I/R)-induced arrhythmias and infarct size were investigated in isolated rat heart. Methods: The isolated hearts were divided into 7 groups, mounted on a Langendorff apparatus at constant pressure then subjected to 30 min zero flow global ischemia followed by 120 min reperfusion. In the control group, normal Krebs-Henseleit (K/H) solution was perfused into the hearts throughout the experiment. In two separate sets of experiments, the treatment groups received 12, 24 and 48 mM of fructose with/without normal glucose in K/H solution for 20 min at the beginning of reperfusion...
March 2018: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29664057/remote-ischemic-postconditioning-for-ischemic-stroke-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#7
Jing-Jing Zhao, Hui Xiao, Wen-Bo Zhao, Xiao-Pei Zhang, Yu Xiang, Zeng-Jie Ye, Miao-Miao Mo, Xue-Ting Peng, Lin Wei
Background: Remote ischemic postconditioning (RIPostC) appears to protect distant organs from ischemia-reperfusion injury (IRI). However, cerebral protection results have remained inconclusive. In the present study, a meta-analysis was performed to compare stroke patients with and without RIPostC. Methods: CNKI, WanFang, VIP, CBM, PubMed, and Cochrane Library databases were searched up to July 2016. Data were analyzed using both fixed-effects and random-effects models by Review Manager...
April 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29623935/neuroprotective-effect-of-ischemic-postconditioning-on-sciatic-nerve-transection
#8
Xiao-Bin Zhou, Na Liu, Dong Wang, De-Xin Zou, Chang-Wei Wei, Jun-Lin Zhou
Ischemic preconditioning or postconditioning has been shown to have neuroprotective effect on cerebral ischemia, but it has not been studied in peripheral nerve injury. In this study, a rat model of sciatic nerve transection was established, and subjected to three cycles of ischemia for 10 minutes + reperfusion for 10 minutes, once a day. After ischemic postconditioning, serum insulin-like growth factor 1 expression increased; sciatic nerve Schwann cell myelination increased; sensory function and motor function were restored...
March 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29617505/evaluation-of-the-effects-of-atorvastatin-and-ischemic-postconditioning-preventing-on-the-ischemia-and-reperfusion-injury-experimental-study-in-rats
#9
Henrique Budib Dorsa Pontes, José Carlos Dorsa Vieira Pontes, Euler de Azevedo Neto, Giovanna Serra da Cruz Vendas, João Victor Cunha Miranda, Letícia do Espírito Santos Dias, João Victor Durães Gomes Oliva, Murilo Henrique Martins de Almeida, Ian de Oliveira Chaves, Tricia Luna Sampaio, Carlos Henrique Marques Dos Santos, Doroty Mesquita Dourado
INTRODUCTION: Reperfusion injury leads to systemic morphological and functional pathological alterations. Some techniques are already estabilished to attenuate the damage induced by reperfusion. Ischemic preconditioning is one of the standard procedures. In the last 20 years, several experimental trials demonstrated that the ischemic postconditioning presents similar effectiveness. Recently experimental trials demonstrated that statins could be used as pharmacological preconditioning...
January 2018: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29605662/the-mtor-cell-signaling-pathway-is-crucial-to-the-long-term-protective-effects-of-ischemic-postconditioning-against-stroke
#10
Peng Wang, Rong Xie, Michelle Cheng, Robert Sapolsky, Xunming Ji, Heng Zhao
Ischemic postconditioning (IPostC) protects against stroke, but few have studied the pathophysiological mechanisms of its long-term protective effects. Here, we investigated whether the mTOR pathway is involved in the long-term protective effects of IPostC. Stroke was induced in rats by distal middle cerebral artery occlusion (dMCAo) combined with 30 min of bilateral common carotid artery (CCA) occlusion, and IPostC was induced after the CCA release. Injury size and behavioral tests were measured up to 3 weeks post stroke...
March 29, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29603122/postconditioning-effects-of-argon-or-xenon-on-early-graft-function-in-a-porcine-model-of-kidney-autotransplantation
#11
J De Deken, S Rex, E Lerut, W Martinet, D Monbaliu, J Pirenne, I Jochmans
BACKGROUND: Ischaemia-reperfusion injury is inevitable during renal transplantation and can lead to delayed graft function and primary non-function. Preconditioning, reconditioning and postconditioning with argon and xenon protects against renal ischaemia-reperfusion injury in rodent models. The hypothesis that postconditioning with argon or xenon inhalation would improve graft function in a porcine renal autotransplant model was tested. METHODS: Pigs (n = 6 per group) underwent left nephrectomy after 60 min of warm ischaemia (renal artery and vein clamping)...
March 30, 2018: British Journal of Surgery
https://www.readbyqxmd.com/read/29572067/independent-roles-of-cgrp-in-cardioprotection-and-hemodynamic-regulation-in-ischemic-postconditioning
#12
Zheng Guo, Na Liu, Lu Chen, Xin Zhao, Mu-Rong Li
Calcitonin gene-related peptide (CGRP) may participate in ischemic post-conditioning (IPost) attenuating myocardial ischemia/reperfusion injury. However, the molecular mechanism underlying the effect of CGRP is still elusive. In this study, we evaluated the difference in hemodynamics, infarct size and CGRP in myocardium and serum of rats after acute myocardial ischemia/reperfusion with and without IPost. A specific antagonist of CGRP receptor, CGRP8-37 was employed to testify the role of endogenous CGRP in IPost...
March 20, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29570780/effects-of-ischemic-postconditioning-on-neuronal-vegf-regulation-and-microglial-polarization-in-a-rat-model-of-focal-cerebral-ischemia
#13
Elga Esposito, Kazuhide Hayakawa, Bum Ju Ahn, Su Jing Chan, Changhong Xing, Anna C Liang, Kyu-Won Kim, Ken Arai, Eng H Lo
Ischemic postconditioning is increasingly being investigated as a therapeutic approach for cerebral ischemia. However, the majority of studies are focused on the acute protection of neurons per se. Whether and how postconditioning affects multiple cells in the recovering neurovascular unit remains to be fully elucidated. Here, we asked whether postconditioning may modulate help-me signaling between injured neurons and reactive microglia. Rats were subjected to 100 min of focal cerebral ischemia, then randomized into a control versus postconditioning group...
March 23, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29530400/ischemic-postconditioning-and-milrinone
#14
EDITORIAL
Jochen Steppan, Dan E Berkowitz, Daniel Nyhan
No abstract text is available yet for this article.
February 2, 2018: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29521306/corrigendum-downregulation-of-na-ca2-exchanger-isoform-1-protects-isolated-hearts-by-sevoflurane-postconditioning-but-not-by-delayed-remote-ischemic-preconditioning-in-rats
#15
(no author information available yet)
[This corrects the article DOI: 10.4103/0366-6999.213967].
March 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29512311/nitrite-as-a-pharmacological-intervention-for-the-successful-treatment-of-crush-syndrome
#16
REVIEW
Jun Kobayashi, Isamu Murata
Crush syndrome is characterized by ischemia/reperfusion injury (IRI). The protective effect of nitrite on experimentally induced IRI has been demonstrated in the heart, kidney, liver, and skeletal muscle. IRI in tissues and systemic organs occurs due to the massive generation of reactive oxygen species and subsequent systemic inflammation. Therefore, ischemic pre and postconditioning are performed in clinical practice. Intravenous administration of nitrite inhibits IRI through nitric oxide-mediated mechanisms...
March 2018: Physiological Reports
https://www.readbyqxmd.com/read/29505549/effect-of-intralipid-on-myocardial-injury-during-valve-replacement-surgery-with-concomitant-radiofrequency-ablation-a-randomized-controlled-trial
#17
RANDOMIZED CONTROLLED TRIAL
Hong Yu, Qi Li, Chan Chen, Tao Li, Ji-Yue Xiong, Zhen Qin, Ming Luo, Zhao-Xia Tan, Ting Liu, Hui Yu, Xiao-Rong Yin, Hai Yu, Rong-Hua Zhou
BACKGROUND: This study aimed to evaluate the effect of intralipid postconditioning (ILPC) on myocardial damage in patients undergoing valve replacement surgery with concomitant radiofrequency ablation (RFA) for atrial fibrillation (AF). METHODS: Randomized patient and assessor-blind controlled trial conducted in adult patients undergoing valve replacement surgery with concomitant RFA. Sixty-nine patients were randomly assigned to ILPC group (n = 34) or control group (n = 35): ILPC group received an intravenous infusion of 20% intralipid (2 mL/kg) just 10 minutes before aortic cross-unclamping, and control group received an equivalent volume of normal saline...
January 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29503556/renoprotective-effect-of-remote-ischemic-postconditioning-in-patients-with-st-elevation-myocardial-infarction-undergoing-primary-percutaneous-coronary-intervention
#18
Bangming Cao, Chi Zhang, Haipeng Wang, Ming Xia, Xiangjun Yang
Background: Whether upper arm remote ischemic postconditioning (RIPostC) exerts protection to kidney in patients with ST-elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PPCI) remains unknown. Methods: Sixty-four patients with STEMI were randomized to PPCI + RIPostC (n=29) and PPCI (n=35) groups. RIPostC consisting of 4 cycles of 5 minutes occlusion/reperfusion by cuff inflation/deflation of the upper arm was started within 1 minute after the first balloon dilatation...
2018: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29498531/clinical-translation-of-myocardial-conditioning
#19
Hans Erik Botker, Thomas Ravn Lassen, Nichlas Riise Jespersen
Rapid admission and acute interventional treatment combined with modern antithrombotic pharmacologic therapy have improved outcome in patients with ST-elevation myocardial infarction. The next major target to further improve outcome, seems to be ischemia reperfusion injury, which may contribute significantly to the final infarct size and hence mortality and post-infarction heart failure. Mechanical conditioning strategies including local and remote ischemic pre-, per- and postconditioning have demonstrated consistent cardioprotective capacities in experimental models of acute IR injury...
March 2, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29487717/meta-analysis-of-the-effects-of-ischemic-postconditioning-on-structural-pathology-in-st-segment-elevation-acute-myocardial-infarction
#20
Baohui Lou, Yadong Cui, Haiyang Gao, Min Chen
In this meta-analysis, we assessed cardiac magnetic resonance imaging data to determine the effects of local and remote ischemic postconditioning (LPoC and RPoC, respectively) on structural pathology in ST-segmentel elevation acute myocardial infarction (STEMI). We searched the Pubmed, Embase and Cochrane Library databases up to May 2017 and included 12 randomized controlled trials (10 LPoC and 2 RPoC)containing 1069 study subjects with thrombolysis in myocardial infarction flow grade 0~1. Weighed mean difference (WMD), standardized mean difference (SMD), and odds ratio (OR) were used for the pooled analysis...
January 30, 2018: Oncotarget
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