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https://www.readbyqxmd.com/read/28526762/exacerbation-of-thromboinflammation-by-hyperglycemia-precipitates-cerebral-infarct-growth-and-hemorrhagic-transformation
#1
Jean-Philippe Desilles, Varouna Syvannarath, Véronique Ollivier, Clément Journé, Sandrine Delbosc, Célina Ducroux, William Boisseau, Liliane Louedec, Lucas Di Meglio, Stéphane Loyau, Martine Jandrot-Perrus, Louis Potier, Jean-Baptiste Michel, Mikael Mazighi, Benoit Ho-Tin-Noé
BACKGROUND AND PURPOSE: Admission hyperglycemia is associated with a poor outcome in acute ischemic stroke. How hyperglycemia impacts the pathophysiology of acute ischemic stroke remains largely unknown. We investigated how preexisting hyperglycemia increases ischemia/reperfusion cerebral injury. METHODS: Normoglycemic and streptozotocin-treated hyperglycemic rats were subjected to transient middle cerebral artery occlusion. Infarct growth and brain perfusion were assessed by magnetic resonance imaging...
May 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28526717/major-contribution-of-the-3-6-7-class-of-trpc-channels-to-myocardial-ischemia-reperfusion-and-cellular-hypoxia-reoxygenation-injuries
#2
Xiju He, Shoutian Li, Benju Liu, Sebastian Susperreguy, Karina Formoso, Jinghong Yao, Jinsong Kang, Anbing Shi, Lutz Birnbaumer, Yanhong Liao
The injury phase after myocardial infarcts occurs during reperfusion and is a consequence of calcium release from internal stores combined with calcium entry, leading to cell death by apoptopic and necrotic processes. The mechanism(s) by which calcium enters cells has(ve) not been identified. Here, we identify canonical transient receptor potential channels (TRPC) 3 and 6 as the cation channels through which most of the damaging calcium enters cells to trigger their death, and we describe mechanisms activated during the injury phase...
May 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28526338/redox-signaling-in-remote-ischemic-preconditioning-induced-cardioprotection-evidences-and-mechanisms
#3
REVIEW
Lovedeep Singh, Puneet Kaur Randhawa, Nirmal Singh, Amteshwar Singh Jaggi
Reactive oxygen species are the reactive molecules that are derived from molecular oxygen and play an important role as redox signaling molecules to confer cardioprotection. Various scientists have demonstrated the key role of redox signaling in cardioprotection by showing a transient increase in their levels during remote ischemic preconditioning (RIPC) phase. The transient increase in reactive oxygen species levels during remote preconditioning phase may take place either through activation of KATP channels or through increased nitric oxide (NO) production...
May 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28525945/the-protective-effect-of-luteolin-on-myocardial-ischemia-reperfusion-i-r-injury-through-tlr4-nf-%C3%AE%C2%BAb-nlrp3-inflammasome-pathway
#4
Xu Zhang, Qianming Du, Yan Yang, Jianing Wang, Shuai Dou, Chao Liu, Junguo Duan
The purpose of the present study was to investigate the effect of Luteolin(Lut) on myocardial ischemia reperfusion injury and explore the underlying mechanism. Myocardial ischemia reperfusion injury (I/R) model was induced with 30min of left anterior descending (LAD) occlusion followed by 24h of reperfusion. In vivo, the rats were randomly divided into 5 groups: (1)Sham, (2)I/R, (3)I/R+Lut(40mg/kg), (4)I/R+Lut(80mg/kg) and (5)I/R+Lut(160mg/kg). In vitro, the H9c2 cells were assigned to five groups: (1)control, (2)hypoxia-reoxygenation(H/R), (3)H/R+Lut(5μM), (4)H/R+Lut(10μM) and (5)H/R+Lut(20μM)...
May 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28525886/relationship-between-arterial-access-and-outcomes-in-st-elevation-myocardial-infarction-with-a-pharmacoinvasive-versus-primary-percutaneous-coronary-intervention-strategy-insights-from-the-strategic-reperfusion-early-after-myocardial-infarction-stream-study
#5
Jay Shavadia, Robert Welsh, Anthony Gershlick, Yinggan Zheng, Kurt Huber, Sigrun Halvorsen, Phillipe G Steg, Frans Van de Werf, Paul W Armstrong
BACKGROUND: The effectiveness of radial access (RA) in ST-elevation myocardial infarction (STEMI) has been predominantly established in primary percutaneous coronary intervention (pPCI) with limited exploration of this issue in the early postfibrinolytic patient. The purpose of this study was to compare the effectiveness and safety of RA versus femoral (FA) access in STEMI undergoing either a pharmacoinvasive (PI) strategy or pPCI. METHODS AND RESULTS: Within STrategic Reperfusion Early After Myocardial Infarction (STREAM), we evaluated the relationship between arterial access site and primary outcome (30-day composite of death, shock, congestive heart failure, or reinfarction) and major bleeding according to the treatment strategy received...
June 13, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28525795/the-role-of-secretory-phospholipases-as-therapeutic-targets-for-the-treatment-of-myocardial-ischemia-reperfusion-injury
#6
REVIEW
Sriram Ravindran, Gino A Kurian
Myocardial reperfusion injury is a consequence of restoration of blood flow post ischemia. It is a complex process involving an acute inflammatory response activated by cytokines, chemokines, growth factors, and mediated by free radicals, calcium overload leading to mitochondrial dysfunction. Secretory phospholipases (sPLA2) are a group of pro-inflammatory molecules associated with diseases such as atherosclerosis, which increase the risk of reperfusion injury. This acute response leads to breakdown of phospholipids such as cardiolipin, found in the mitochondrial inner membrane, leading to disruption of energy producing enzymes of the electron transport chain...
May 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28525553/evaluation-of-conventional-and-frozen-elephant-trunk-techniques-on-spinal-cord-blood-flow-in-an-animal-model%C3%A2
#7
Sergey Leontyev, Maja-Theresa Dieterlen, Michelle Halling, Franziska Schlegel, Alexandro Hoyer, Susann Ossmann, Kerstin Klaeske, Christian D Etz, Friedrich W Mohr
OBJECTIVES: The treatment of patients with extensive thoracic aortic disease involving the arch and descending aorta is often performed using the frozen elephant trunk technique (FET). Spinal cord blood flow (SCBF) in cervical, thoracic and lumbar sections prior, during and after aortic arch surgery were compared in conventional elephant trunk (cET) and FET technique in a pig model. METHODS: German Landrace pigs (75-85 kg) underwent aortic arch surgery using the FET ( n  = 8) or cET ( n  = 8) techniques...
May 18, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28525507/subcellular-energetics-and-metabolism-a-cross-species-framework
#8
Robert H Thiele
Although it is generally believed that oxidative phosphorylation and adequate oxygenation are essential for life, human development occurs in a profoundly hypoxic environment and "normal" levels of oxygen during embryogenesis are even harmful. The ability of embryos not only to survive but also to thrive in such an environment is made possible by adaptations related to metabolic pathways. Similarly, cancerous cells are able not only to survive but also to grow and spread in environments that would typically be fatal for healthy adult cells...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28524859/mesenchymal-stem-cells-sense-mitochondria-released-from-damaged-cells-as-danger-signals-to-activate-their-rescue-properties
#9
Meriem Mahrouf-Yorgov, Lionel Augeul, Claire Crola Da Silva, Maud Jourdan, Muriel Rigolet, Sylvie Manin, René Ferrera, Michel Ovize, Adeline Henry, Aurélie Guguin, Jean-Paul Meningaud, Jean-Luc Dubois-Randé, Roberto Motterlini, Roberta Foresti, Anne-Marie Rodriguez
Mesenchymal stem cells (MSCs) protect tissues against cell death induced by ischemia/reperfusion insults. This therapeutic effect seems to be controlled by physiological cues released by the local microenvironment following injury. Recent lines of evidence indicate that MSC can communicate with their microenvironment through bidirectional exchanges of mitochondria. In particular, in vitro and in vivo studies report that MSCs rescue injured cells through delivery of their own mitochondria. However, the role of mitochondria conveyed from somatic cells to MSC remains unknown...
May 19, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28524456/endothelial-microparticles-released-by-activated-protein-c-protect-beta-cells-through-epcr-par1-and-annexin-a1-fpr2-pathways-in-islets
#10
Guillaume Kreutter, Mohamad Kassem, Ali El Habhab, Philippe Baltzinger, Malak Abbas, Julie Boisrame-Helms, Lamia Amoura, Jean Peluso, Blandine Yver, Zobairi Fatiha, Geneviève Ubeaud-Sequier, Laurence Kessler, Florence Toti
Islet transplantation is associated with early ischaemia/reperfusion, localized coagulation and redox-sensitive endothelial dysfunction. In animal models, islet cytoprotection by activated protein C (aPC) restores islet vascularization and protects graft function, suggesting that aPC triggers various lineages. aPC also prompts the release of endothelial MP that bear EPCR, its specific receptor. Microparticles (MP) are plasma membrane procoagulant vesicles, surrogate markers of stress and cellular effectors...
May 19, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28524210/sulfur-dioxide-foe-or-friend-for-life
#11
REVIEW
Xin-Bao Wang, Hong Cui, Xiaohong Liu, Jun-Bao Du
Sulfur dioxide (SO₂) is a toxic gas and air pollutant. The toxic effects of SO₂ have been extensively studied. Oxidative damage due to SO2 can occur in multiple organs. Inhaled SO₂ can also cause chromosomal aberrations, DNA damage and gene mutations in mammals. However, SO₂ can also be generated from the sulfur-containing amino acid, L-cysteine. Recent studies have shown that SO₂ has a vasorelaxant effect, and ameliorates pulmonary hypertension and vascular remodeling. SO₂ can also reduce lung injury and myocardial injury in rats...
May 19, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28523230/targeting-resolution-of-neuroinflammation-after-ischemic-stroke-with-a-lipoxin-a4-analog-protective-mechanisms-and-long-term-effects-on-neurological-recovery
#12
Kimberly E Hawkins, Kelly M DeMars, Jon C Alexander, Lauren G de Leon, Sean C Pacheco, Christina Graves, Changjun Yang, Austin O McCrea, Jan C Frankowski, Timothy J Garrett, Marcelo Febo, Eduardo Candelario-Jalil
BACKGROUND: Resolution of inflammation is an emerging new strategy to reduce damage following ischemic stroke. Lipoxin A4 (LXA 4) is an anti-inflammatory, pro-resolution lipid mediator that reduces neuroinflammation in stroke. Since LXA 4 is rapidly inactivated, potent analogs have been synthesized, including BML-111. We hypothesized that post-ischemic, intravenous treatment with BML-111 for 1 week would provide neuroprotection and reduce neurobehavioral deficits at 4 weeks after ischemic stroke in rats...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28522565/integrin-%C3%AE-v%C3%AE-5-inhibition-protects-against-ischemia-reperfusion-induced-lung-injury-in-an-autophagy-dependent-manner
#13
Dan Zhang, Chichi Li, Yuanlin Song, Jian Zhou, Yuping Li, Jing Li, Chunxue Bai
Integrin αvβ5 mediates pulmonary endothelial barrier function and acute lung injury (LI), but its roles in cell apoptosis and autophagy are unclear. Thus, the aims of this study were to investigate the significance of αvβ5 in ischemia/reperfusion (I/R)-induced apoptosis and LI and to explore the relationship between αvβ5 and autophagy. Human pulmonary micro-vascular endothelial cells (HPMVECs) were pretreated with an αvβ5-blocking antibody (ALULA) and challenged with oxygen-glucose deprivation/oxygen-glucose restoration, which mimics I/R; then, cellular autophagy and apoptosis were detected, and cell permeability was assessed...
May 18, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28522550/suppression-of-microrna-135b-5pprotects-againstmyocardial-ischemia-reperfusion-injury-by-activatingjak2-stat3-signaling-pathway-in-mice-duringsevofluraneanesthesia
#14
Xiao-Juan Xie, Dong-Mei Fan, Kai Xi, Ya-Wei Chen, Peng-Wei Qi, Qian-Hui Li, Liang Fang, Li-Gang Ma
The study aims to explore the effects of miR-135b-5p on myocardial ischemia/reperfusion (I/R) injuries by regulating JAK2/STAT signaling pathway by mediating inhalation anesthesia with sevoflurane. A sum of 120 healthy Wistar male mice was assigned into six groups. Left ventricular ejection fraction (LVEF) and left ventricular shortening fraction (LVSF) were detected. Cardiomyocyte apoptosis was determined by TUNEL assay. MiR-135b-5p expression, mRNA and protein expression of p-STAT3, p-JAK2, STAT3, JAK2, Bcl2 and Bax were detected by qRT-PCR and Western blotting...
May 18, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28522336/geldanamycin-inhibits-fas-signaling-pathway-and-protects-neurons-against-ischemia
#15
Xiao-Hui Yin, Yan-Ling Han, Ying Zhuang, Jing-Zhi Yan, Chong Li
The inhibitor of Heat shock proteins 90, geldanamycin (GA), has been reported neuroprotective against both global and focal brain ischemia. To understand the mechanisms underlies the neuroprotection effect of GA, we investigated the relationship between GA pretreatment and Fas signaling pathway in rat global brain ischemia/reperfusion model in the present study. Results showed that GA attenuated neuron loss significantly in hippocampal CA1 region. Upon GA pretreatment, Mixed Lineage Kinase 3 (MLK3) expression and activation and FasL expression was decreased, the assembly of death-inducing signaling complex and activation of downstream apoptosis-associating proteins were inhibited along with neuroprotection...
May 15, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28522232/efficacy-of-new-measures-saving-time-in-acute-stroke-management-a-quantified-analysis
#16
Ana María Iglesias Mohedano, Andrés García Pastor, Fernando Díaz Otero, Pilar Vázquez Alen, Marta Vales Montero, Elisa Luque Buzo, Nuria Redondo Ráfales, Beatriz Chavarria Cano, Yolanda Fernández Bullido, Jose Antonio Villanueva Osorio, Antonio Gil Núñez
BACKGROUND: Time to treatment remains the most important factor in acute ischemic stroke prognosis. We quantified the effect of new interventions reducing in-hospital delays in acute stroke management and assessed its repercussion on door-to-imaging (DTI), imaging-to-needle (ITN), and door-to-needle (DTN) times. METHODS: Prospective registry of consecutive stroke patients who were candidates for reperfusion therapy attended in a tertiary care hospital from February 1 to December 31, 2014...
May 15, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28521971/comparison-of-early-sequential-hypothermia-and-delayed-hypothermia-on-neurological-function-after-resuscitation-in-a-swine-model
#17
Wei Yuan, Jun-Yuan Wu, Yong-Zhen Zhao, Jie Li, Jie-Bin Li, Zhen-Hua Li, Chun-Sheng Li
BACKGROUND: We utilized a porcine cardiac arrest model to compare early sequential hypothermia (ESH) with delayed hypothermia (DH) and no hypothermia (NH) to investigate the different effects on cerebral function after resuscitation. METHODS: After return of spontaneous circulation (ROSC), resuscitated 24 pigs divided into three groups. The ESH group implemented early sequential hypothermia immediately, and the DH group implemented delayed hypothermia at 1 h after ROSC...
May 11, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28521863/high-pre-ischemic-fatty-acid-levels-decrease-cardiac-recovery-in-an-isolated-rat-heart-model-of-donation-after-circulatory-death
#18
Petra Niederberger, Emilie Farine, Maria Arnold, Rahel K Wyss, Maria N Sanz, Natalia Méndez-Carmona, Brigitta Gahl, Georg M Fiedler, Thierry P Carrel, Hendrik T Tevaearai Stahel, Sarah L Longnus
RATIONALE: Donation after circulatory death (DCD) could improve cardiac graft availability. However, strategies to optimize cardiac graft recovery remain to be established in DCD; these hearts would be expected to be exposed to high levels of circulatory fat immediately prior to the inevitable period of ischemia prior to procurement. OBJECTIVE: We investigated whether acute exposure to high fat prior to warm, global ischemia affects subsequent hemodynamic and metabolic recovery in an isolated rat heart model of DCD...
June 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28521514/baicalein-attenuates-lung-injury-induced-by-myocardial-ischemia-and-reperfusion
#19
Chang-Chi Lai, Po-Hsun Huang, An-Han Yang, Shu-Chiung Chiang, Chia-Yu Tang, Kuo-Wei Tseng, Cheng-Hsiung Huang
Baicalein is an active component of Scutellaria baicalensis Georgi, which has traditionally been used to treat cardiovascular diseases in China. In this study, we investigated if treatment with baicalein can attenuate the lung injury induced by myocardial ischemia and reperfusion (I/R). Myocardial I/R, induced by a 40-min occlusion of the left anterior descending coronary artery and a 3-h reperfusion, significantly increased histological damage and the wet-to-dry weight ratio of lungs in rats. The terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL)-positive nuclei and caspase-3 activation was significantly increased in the lungs...
May 18, 2017: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/28521244/cholecystokinin-protects-mouse-liver-against-ischemia-and-reperfusion-injury
#20
Ying Zhang, Jiali Zhu, Long Guo, Yun Zou, Fang Wang, Han Shao, Jinbao Li, Xiaoming Deng
BACKGROUND: Cholecystokinin (CCK), as a gastrointestinal hormone, has an important protective role against sepsis or LPS-induced endotoxic shock. We aim to address the role of CCK in hepatic ischemia followed by reperfusion (I/R) injury. MATERIALS AND METHODS: A murine model of 60min partial hepatic ischemia followed by 6h of reperfusion was used in this study. CCK and CCKAR Levels in blood and liver were detected at 3h, 6h, 12h and 24h after reperfusion. Then the mice were treated with CCK or proglumide, a nonspecific CCK-receptor (CCK-R) antagonist...
May 15, 2017: International Immunopharmacology
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