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Ischemia reperfusion injury

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https://www.readbyqxmd.com/read/28239650/mitophagy-and-mitochondrial-biogenesis-in-atrial-tissue-of-patients-undergoing-heart-surgery-with-cardiopulmonary-bypass
#1
Allen M Andres, Kyle C Tucker, Amandine Thomas, David J R Taylor, David Sengstock, Salik M Jahania, Reza Dabir, Somayeh Pourpirali, Jamelle A Brown, David G Westbrook, Scott W Ballinger, Robert M Mentzer, Roberta A Gottlieb
Mitophagy occurs during ischemia/reperfusion (I/R) and limits oxidative stress and injury. Mitochondrial turnover was assessed in patients undergoing cardiac surgery involving cardiopulmonary bypass (CPB). Paired biopsies of right atrial appendage before initiation and after weaning from CPB were processed for protein analysis, mitochondrial DNA/nuclear DNA ratio (mtDNA:nucDNA ratio), mtDNA damage, mRNA, and polysome profiling. Mitophagy in the post-CPB samples was evidenced by decreased levels of mitophagy adapters NDP52 and optineurin in whole tissue lysate, decreased Opa1 long form, and translocation of Parkin to the mitochondrial fraction...
February 23, 2017: JCI Insight
https://www.readbyqxmd.com/read/28238218/vagal-nerve-stimulation-reduces-infarct-size-via-a-mechanism-involving-the-alpha-7-nicotinic-acetylcholine-receptor-and-down-regulation-of-cardiac-and-vascular-arginase
#2
Attila Kiss, Yahor Tratsiakovich, Ali Mahdi, Jiangning Yang, Adrian T Gonon, Bruno K Podesser, John Pernow
AIMS: Vagal nerve stimulation (VNS) protects from myocardial and vascular injury following myocardial ischemia and reperfusion (IR) via a mechanism involving activation of alpha-7 nicotinic acetylcholine receptor (α7 nAChR) and reduced inflammation. Arginase is involved in development of myocardial IR injury driven by inflammatory mediators. The aim of the study was to clarify whether VNS downregulates myocardial and vascular arginase via a mechanism involving activation of α7 nAChR following myocardial IR METHODS: Anaesthetized rats were randomized to (1) sham operated, (2) control IR (30 min ischemia and 2 h reperfusion, (3) VNS throughout IR, (4) the arginase inhibitor nor-NOHA+IR, (5) nor-NOHA+VNS+IR, (6) selective α7 nAChR blockade by methyllycaconitine (MLA) followed by VNS throughout IR and (7) MLA+IR...
February 26, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28238004/effects-of-therapeutic-hypothermia-for-neuroprotection-from-the-viewpoint-of-redox-regulation
#3
REVIEW
Nobuyuki Nosaka, Ayumi Okada, Hirokazu Tsukahara
Redox regulation has recently been recognized as an important factor in acute illnesses as well as in chronic diseases. It has also become a target for neuroprotection in acute intensive care. Despite its well-known therapeutic effects, therapeutic hypothermia has recently been re-evaluated for its potential use in emergency and critical care medicine. Hypothermia is an undesirable physiological condition that can increase oxidative stress and decrease anti-oxidative potency. However, many studies have shown that under ischemia/reperfusion conditions, therapeutic hypothermia actually suppresses enhanced oxidative stress and maintains or increases anti-oxidative potency...
February 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28236861/effect-of-dexmedetomidine-on-acute-lung-injury-in-experimental-ischemia-reperfusion-model
#4
Ömer Burak Küçükebe, Deniz Özzeybek, Ruslan Abdullayev, Adil Ustaoğlu, Işıl Tekmen, Tuncay Küme
PURPOSE: Ischemia-reperfusion injury is one of the consequences of tourniquet application for extremity surgery. The aim of the study was to establish the effect of dexmedetomidine on the acute lung injury following lower extremity experimental ischemia-reperfusion model in rats. METHODS: Twenty-eight Wistar-Albino breed Rats were recruited after Ethics Committee approval and allocated into 4 groups, each with 7 subjects. Group 1 (SHAM) received only anesthesia...
March 2017: Brazilian Journal of Anesthesiology
https://www.readbyqxmd.com/read/28236211/%C3%AE-caryophyllene-pretreatment-alleviates-focal-cerebral-ischemia-reperfusion-injury-by-activating-pi3k-akt-signaling-pathway
#5
Qian Zhang, Ruidi An, Xiaocui Tian, Mei Yang, Minghang Li, Jie Lou, Lu Xu, Zhi Dong
β-Caryophyllene (BCP) has been reported to be protective against focal cerebral ischemia-reperfusion (I/R) injury by its anti-oxidative and anti-inflammatory features. Recent study demonstrates that the BCP exhibits potential neuroprotection against I/R injury induced apoptosis, however, the mechanism remains unknown. Therefore, we investigate the underlying anti-apoptotic mechanism of BCP pretreatment in I/R injury. Sprague-Dawley rats (pretreated with BCP suspensions or solvent orally for 7 days) were subjected to transient Middle Cerebral Artery Occlusion (MCAO) for 90 min, followed by 24 h reperfusion...
February 24, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28231545/aqueous-extract-of-cortex-dictamni-protects-h9c2-cardiomyocytes-from-hypoxia-reoxygenation-induced-oxidative-stress-and-apoptosis-by-pi3k-akt-signaling-pathway
#6
Lin Li, Yunfeng Zhou, Yanlin Li, Lili Wang, Lan Sun, Lidong Zhou, Hiderori Arai, Yun Qi, Yang Xu
Ischemia-reperfusion injury is the major manifestation of ischemic heart disease, which facilitates cardiac arrhythmias, heart failure and death. Oxidative stress and apoptosis have been involved in the pathogenesis of myocardial ischemia-reperfusion injury. Modern pharmacological studies have indicated that the extracts and active compounds of Cortex Dictamni exhibit antioxidative and cardiovascular protective activities. This study was designed to investigate the protective effect of aqueous extract of Cortex Dictamni (CDAE) on regulating hypoxia/reoxygenation (H/R)-induced cardiomyocytes oxidative stress and apoptosis...
February 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28230854/opposite-effects-of-hdac5-and-p300-on-mrtf-a-related-neuronal-apoptosis-during-ischemia-reperfusion-injury-in-rats
#7
Na Li, Qiong Yuan, Xiao-Lu Cao, Ying Zhang, Zhen-Li Min, Shi-Qiang Xu, Zhi-Jun Yu, Jing Cheng, Chunxiang Zhang, Xia-Min Hu
Our recent study has revealed that the myocardin-related transcription factor-A (MRTF-A) is involved in the apoptosis of cortical neurons induced by ischemia/reperfusion (I/R). Histone deacetylase 5 (HDAC5) and histone acetyltransferase p300 (P300) are two well-known regulators for transcription factors; however, their roles in MRTF-A-related effect on neuronal injuries during I/R are still unclear. In this study, in a model rat cerebral I/R injury via middle cerebral artery occlusion and reperfusion, we found that the expression and activity of HDAC5 was upregulated, whereas p300 and MRTF-A were downregulated both in expression and activity during I/R...
February 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28230791/the-temporal-pattern-flux-and-function-of-autophagy-in-spinal-cord-injury
#8
REVIEW
Kailiang Zhou, Charles A Sansur, Huazi Xu, Xiaofeng Jia
Previous studies have indicated that autophagy plays a critical role in spinal cord injury (SCI), including traumatic spinal cord injury (TSCI) and ischemia-reperfusion spinal cord injury (IRSCI). However, while the understanding of mechanisms underlying autophagy in SCI has progressed, there remain several controversial points: (1) temporal pattern results of autophagic activation after SCI are not consistent across studies; (2) effect of accumulation of autophagosomes due to the blockade or enhancement of autophagic flux is uncertain; (3) overall effect of enhanced autophagy remains undefined, with both beneficial and detrimental outcomes reported in SCI literature...
February 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28230738/clinical-implications-of-20-hydroxyeicosatetraenoic-acid-in-the-kidney-liver-lung-and-brain-an-emerging-therapeutic-target
#9
REVIEW
Osama H Elshenawy, Sherif M Shoieb, Anwar Mohamed, Ayman O S El-Kadi
Cytochrome P450-mediated metabolism of arachidonic acid (AA) is an important pathway for the formation of eicosanoids. The ω-hydroxylation of AA generates significant levels of 20-hydroxyeicosatetraenoic acid (20-HETE) in various tissues. In the current review, we discussed the role of 20-HETE in the kidney, liver, lung, and brain during physiological and pathophysiological states. Moreover, we discussed the role of 20-HETE in tumor formation, metabolic syndrome and diabetes. In the kidney, 20-HETE is involved in modulation of preglomerular vascular tone and tubular ion transport...
February 20, 2017: Pharmaceutics
https://www.readbyqxmd.com/read/28229420/noninvasive-assessment-of-cell-fate-and-biology-in-transplanted-mesenchymal-stem-cells
#10
Federico Franchi, Martin Rodriguez-Porcel
Recently, molecular imaging has become a conditio sine qua non for cell-based regenerative medicine. Developments in molecular imaging techniques, such as reporter gene technology, have increasingly enabled the noninvasive assessment of the fate and biology of cells after cardiovascular applications. In this context, bioluminescence imaging is the most commonly used imaging modality in small animal models of preclinical studies. Here, we present a detailed protocol of a reporter gene imaging approach for monitoring the viability and biology of Mesenchymal Stem Cells transplanted in a mouse model of myocardial ischemia reperfusion injury...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28228404/endothelial-colony-forming-cells-ameliorate-endothelial-dysfunction-via-secreted-factors-following-ischemia-reperfusion-injury
#11
Jason A Collett, Purvi Mehrotra, Allison Crone, W Christopher Shelley, Mervin C Yoder, David P Basile
Damage to endothelial cells contributes to acute kidney injury (AKI) by leading to impaired perfusion. Endothelial colony-forming cells (ECFCs) are endothelial precursor cells with high proliferative capacity, pro-angiogenic activity, and in vivo vessel forming potential. We hypothesized that ECFCs may ameliorate the degree of AKI and/or promote repair of the renal vasculature following ischemia/reperfusion (I/R). Rat pulmonary microvascular ECs (PMVEC) with high proliferative potential were compared with pulmonary artery ECs (PAEC) with low proliferative potential in rats subjected to renal I/R...
February 22, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28228367/blockade-of-hmgb1-preserves-vascular-homeostasis-and-improves-blood-perfusion-in-rats-of-acute-limb-ischemia-reperfusion
#12
Yang Liu, Changyou Zhou, Jianjun Jiang, Qingbo Su, Xiangjiu Ding
Acute limb ischemia is one of the most common peripheral arterial disease, while surgical restoration of blood flow often results in ischemia/reperfusion (I/R) injury. Our previous study revealed the inflammation intensity in arterial tissue, characterized by expression of high mobility group box protein 1 (HMGB1), was contrary to the fluctuation of hemodynamics in reperfusion limbs in a rat model. This study meant to clarify the role of HMGB1 during this process. Laser Doppler perfusion imaging evaluated limb hemodynamics in mean and max perfusion unit (PU)...
February 21, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28228090/cardioprotective-utility-of-urocortin-in-myocardial-ischemia-reperfusion-injury-where-do-we-stand
#13
Craig Basman, Pratik Agrawal, Richard Knight, Louis Saravolatz, Chad McRee, Carol Chen-Scarabelli, Jagat Narula, Tiziano Scarabelli
There has been a constant pursuit for development of newer therapies which can contribute to the relatively nascent field of cardioprotection in the setting of myocardial ischemia-reperfusion injury. One novel cardioprotective agent among others, that has shown promising results in the limited number of research studies undertaken till now, is Urocortin. Urocortins are peptides belonging to the Corticotropin-Releasing Hormone family. Acting through a variety of downstream mechanisms, urocortin has been shown to alter cellular metabolism and modulate the mechanism of cell death occurring as a result of ischemia-reperfusion injury...
February 22, 2017: Current Molecular Pharmacology
https://www.readbyqxmd.com/read/28228072/curcumin-and-endothelial-function-evidence-and-mechanisms-of-protective-effects
#14
Maryam Saberi Karimian, Matteo Pirro, Thomas P Johnston, Muhammed Majeed, Amirhossein Sahebkar
BACKGROUND: The endothelium is a large paracrine organ regulating cell growth, vascular tone and thrombogenicity as well as platelet and leukocyte interactions. Endothelial function can be assessed by non-invasive techniques [e.g. flow-mediated vasodilation, nitroglycerin-mediated dilation and pulse wave velocity] and measuring specific circulating biomarkers [cell adhesion molecules, endothelial microparticles and endothelial progenitor cells]. Impaired endothelial function plays a key role in the development of atherosclerosis, arterial hypertension, heart failure, ischemia-reperfusion injury, Alzheimer's disease and other conditions...
February 22, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28226980/gastric-mucosa-injury-quantification-in-an-ischemia-reperfusion-experimental-model
#15
E Pena-Mercado, M Garcia-Lorenzana, E Arechaga, C H Gonzalez-de la Rosa, N E Beltran, E Pena-Mercado, M Garcia-Lorenzana, E Arechaga, C H Gonzalez-de la Rosa, N E Beltran, E Arechaga, E Pena-Mercado, M Garcia Lorenzana, N E Beltran
Gastric ischemia - reperfusion (I/R) injury is an important clinical problem, which is developed in more than 80% of critically ill patients. I/R is caused by interruption of blood supply to an organ or tissue followed by blood reflow into the exposed area, leading to multiple organ failure and death. Gastric reactance has been proposed to measure tissue injury caused by ischemia. The present study evaluates a new method to quantify gastric tissue damage due to I/R, and assess its relation to gastric reactance changes...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226875/dihydrocapsaicin-induced-hypothermia-after-asphyxiai-cardiac-arrest-in-rats
#16
Junyun He, Leanne Young, Xiaofeng Jia, Junyun He, Leanne Young, Xiaofeng Jia, Xiaofeng Jia, Leanne Young, Junyun He
Cardiac arrest (CA) is one of the leading causes of mortality and morbidity in the world. Fast, reversible and controllable pharmaceutical-induced hypothermia (PIH) is strongly desired to treat ischemia-reperfusion brain injury. Dihydrocapsaicin (DHC), an agonist of transient receptor potential vanilloid type 1 cation channel (TRPV1), is an emerging candidate for PIH. Its capability to lower body temperature has been validated in both healthy and stroke animal models. However, DHC has shown cardiovascular effects and its safety and feasibility in a CA model has not been tested...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224816/protective-effect-of-curcumin-against-myocardium-injury-in-ischemia-reperfusion-rats
#17
HuaJin Liu, ChangHua Wang, Zengyong Qiao, Yawei Xu
CONTEXT: Curcumin has long been used as a condiment and a traditional medicine worldwide. OBJECTIVE: The current study investigates the possible protective effect of curcumin on heart function in myocardium ischemia-reperfusion (MIR) rats. MATERIALS AND METHODS: We fed Sprague-Dawley (SD) rats (10 in each group) either curcumin (10, 20 or 30 mg/kg/d) or saline. Twenty days later, the rats were subjected to myocardial injuries by ligating the left anterior descending coronary artery (60 min), and subsequently, the heart (3 h) reperfused by releasing the ligation...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28224430/edaravone-enhances-the-viability-of-ischemia-reperfusion-flaps
#18
Dong-Yi Zhang, Shen-Song Kang, Zheng-Wen Zhang, Rui Wu
The purpose of the experiment was to study the efficacy of edaravone in enhancing flap viability after ischemia/reperfusion (IR) and its mechanism. Forty-eight adult male SD rats were randomly divided into 3 groups: control group (n=16), IR group (n=16), and edaravone-treated IR group (n=16). An island flap at left lower abdomen (6.0 cm×3.0 cm in size), fed by the superficial epigastric artery and vein, was created in each rat of all the three groups. The arterial blood flow of flaps in IR group and edaravone-treated IR group was blocked for 10 h, and then the blood perfusion was restored...
February 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28223727/remote-ischemic-perconditioning-prevents-liver-transplantation-induced-ischemia-reperfusion-injury-in-rats-role-of-ros-rns-and-enos
#19
Ning He, Jun-Jun Jia, Jian-Hui Li, Yan-Fei Zhou, Bing-Yi Lin, Yi-Fan Peng, Jun-Jie Chen, Tian-Chi Chen, Rong-Liang Tong, Li Jiang, Hai-Yang Xie, Lin Zhou, Shu-Sen Zheng
AIM: To investigate the underlying mechanisms of the protective role of remote ischemic perconditioning (RIPerC) in rat liver transplantation. METHODS: Sprague-Dawley rats were subjected to sham, orthotopic liver transplantation (OLT), ischemic postconditioning (IPostC) or RIPerC. After 3 h reperfusion, blood samples were taken for measurement of alanine aminotransferase, aspartate aminotransferase, creatinine (Cr) and creatinine kinase-myocardial band (CK-MB). The liver lobes were harvested for the following measurements: reactive oxygen species (ROS), H2O2, mitochondrial membrane potential (ΔΨm) and total nitric oxide (NO)...
February 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28223055/plasma-monocyte-chemotactic-protein-1-is-associated-with-acute-kidney-injury-and-death-after-cardiac-operations
#20
Dennis G Moledina, Selin Isguven, Eric McArthur, Heather Thiessen-Philbrook, Amit X Garg, Michael Shlipak, Richard Whitlock, Peter A Kavsak, Steven G Coca, Chirag R Parikh
BACKGROUND: Monocyte chemotactic protein-1 (MCP-1; chemokine C-C ligand-2 [CCL-2]) is upregulated in ischemia-reperfusion injury and is a promising biomarker of inflammation in cardiac operations. METHODS: We measured preoperative and postoperative plasma MCP-1 levels in adults undergoing cardiac operations to evaluate the association of perioperative MCP-1 levels with acute kidney injury (AKI) and death in Translational Research Investigating Biomarker Endpoints in AKI (TRIBE-AKI), a prospective, multicenter, observational cohort...
February 18, 2017: Annals of Thoracic Surgery
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