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Myocardial ischemia and glucose

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https://www.readbyqxmd.com/read/28549781/nucleostemin-dysregulation-contributes-to-ischemic-vulnerability-of-diabetic-hearts-role-of-ribosomal-biogenesis
#1
Shihao Zhao, Yunlong Xia, Fuyang Zhang, Zhenyu Xiong, Yueyang Li, Wenjun Yan, Xiyao Chen, Wei Wang, Helin Wang, Erhe Gao, Yan Lee, Congye Li, Shan Wang, Ling Zhang, Ling Tao
Diabetes is a major health problem worldwide. As well-known, diabetes greatly increases cardiac vulnerability to ischemia/reperfusion (I/R) injury, but the underlying mechanisms remain elusive. Nucleostemin (NS) is a nucleolar protein that controls ribosomal biogenesis and exerts cardioprotective effects against I/R injury. However, whether NS-mediated ribosomal biogenesis regulates ischemic vulnerability of diabetic hearts remains unanswered. Utilizing myocardial I/R mouse models, we found that cardiac NS expression significantly increased in response to I/R in normal diet (ND)-fed mice...
May 23, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28535803/blood-metabolomic-fingerprint-is-distinct-in-healthy-coronary-and-in-stenosing-or-microvascular-ischemic-heart-disease
#2
Martino Deidda, Cristina Piras, Christian Cadeddu Dessalvi, Damiana Congia, Emanuela Locci, Federica Ascedu, Gianfranco De Candia, Mauro Cadeddu, Giorgio Lai, Raimondo Pirisi, Luigi Atzori, Giuseppe Mercuro
BACKGROUND: The endothelium is a key variable in the pathogenesis of atherosclerosis and its complications, particularly coronary artery disease (CAD). Current evidence suggests that the endothelial status can be regarded as an integrated index of individual atherogenic and anti-atherogenic properties, and that the interaction between circulating factors and the arterial wall might be critical for atherogenesis. In organism-level investigations, a functional view is provided by metabolomics, the study of the metabolic profile of small molecules...
May 23, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28526540/sodium-dependent-glucose-transporters-sglt-in-human-ischemic-heart-a-new-potential-pharmacological-target
#3
Alessandra Di Franco, Giulia Cantini, Alessia Tani, Raffaele Coppini, Sandra Zecchi-Orlandini, Laura Raimondi, Michaela Luconi, Edoardo Mannucci
BACKGROUND: Empagliflozin is reported to reduce cardiovascular mortality and the rate of hospitalization for heart failure in type 2 diabetic patients with prior cardiovascular events. The mechanisms underlying the cardiac effects of this sodium/glucose transporter 2 (SGT2) inhibitor have not yet been clarified, though a direct action of the drug on the cardiomyocytes could be hypothesized. The aim of the present study is to assess the relative expression of SGLT2 and SGLT1, the two most relevant members of the SGLT family being potentially responsive to empagliflozin, in normal, ischemic and hypertrophic human hearts...
May 9, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28513986/pleiotropic-effects-of-chronic-phorbol-ester-treatment-to-improve-glucose-transport-in-insulin-resistant-cardiomyocytes
#4
Christelle Viglino, Bahareh Khoramdin, Guillaume Praplan, Christophe Montessuit
Stimulation of glucose transport is an important determinant of myocardial susceptibility to ischemia and reperfusion. Stimulation of glucose transport is markedly impaired in cardiomyocytes exposed to free fatty acids (FFA). Deactivation of the Focal Adhesion Kinase (FAK) by FFA contributes to glucose transport impairment, and could be corrected by chronic treatment with the phorbol ester TPA. However, TPA must have effects in addition to FAK reactivation to restore stimulated glucose transport. Chronic treatment with TPA improved basal and stimulated glucose transport in FFA-exposed, but not in control cardiomyocytes...
May 17, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28505121/molecular-pathways-involved-in-the-amelioration-of-myocardial-injury-in-diabetic-rats-by-kaempferol
#5
Kapil Suchal, Salma Malik, Sana Irfan Khan, Rajiv Kumar Malhotra, Sameer N Goyal, Jagriti Bhatia, Shreesh Ojha, Dharamvir Singh Arya
There is growing evidence that chronic hyperglycemia leads to the formation of advanced glycation end products (AGEs) which exerts its effect via interaction with the receptor for advanced glycation end products (RAGE). AGE-RAGE activation results in oxidative stress and inflammation. It is well known that this mechanism is involved in the pathogenesis of cardiovascular disease in diabetes. Kaempferol, a dietary flavonoid, is known to possess antioxidant, anti-apoptotic, and anti-inflammatory activities. However, little is known about the effect of kaempferol on myocardial ischemia-reperfusion (IR) injury in diabetic rats...
May 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28504650/neutrophil-derived-s100-calcium-binding-proteins-a8-a9-promote-reticulated-thrombocytosis-and-atherogenesis-in-diabetes
#6
Michael J Kraakman, Man K S Lee, Annas Al-Sharea, Dragana Dragoljevic, Tessa J Barrett, Emilie Montenont, Debapriya Basu, Sarah Heywood, Helene L Kammoun, Michelle Flynn, Alexandra Whillas, Nordin M J Hanssen, Mark A Febbraio, Erik Westein, Edward A Fisher, Jaye Chin-Dusting, Mark E Cooper, Jeffrey S Berger, Ira J Goldberg, Prabhakara R Nagareddy, Andrew J Murphy
Platelets play a critical role in atherogenesis and thrombosis-mediated myocardial ischemia, processes that are accelerated in diabetes. Whether hyperglycemia promotes platelet production and whether enhanced platelet production contributes to enhanced atherothrombosis remains unknown. Here we found that in response to hyperglycemia, neutrophil-derived S100 calcium-binding proteins A8/A9 (S100A8/A9) interact with the receptor for advanced glycation end products (RAGE) on hepatic Kupffer cells, resulting in increased production of IL-6, a pleiotropic cytokine that is implicated in inflammatory thrombocytosis...
May 15, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28500853/protective-effects-of-circulating-microvesicles-derived-from-myocardial-ischemic-rats-on-apoptosis-of-cardiomyocytes-in-myocardial-ischemia-reperfusion-injury
#7
Yao Wang, Su Wei, Yi-Lu Wang, Miao Liu, Man Shang, Qi Zhang, Yan-Na Wu, Ming-Lin Liu, Jun-Qiu Song, Yan-Xia Liu
OBJECTIVE: To investigate the effects of circulating microvesicles derived from myocardial ischemia (I-MVs) on apoptosis in myocardial ischemia/reperfusion (I/R) injury in rats. METHODS: I-MVs from rats undergoing myocardial left anterior descending (LAD) coronary artery ligation were isolated by ultracentrifugation from circulating blood and characterized by flow cytometry. I-MVs were administered intravenously (4.8 mg/kg) at 5 min before reperfusion procedure in I/R injury model which was induced by 30-min of ischemia and 120-min of reperfusion of LAD in rats...
April 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/28466688/the-role-of-peroxisome-proliferator-activated-receptor-%C3%AE-in-mediating-cardioprotection-against-ischemia-reperfusion-injury
#8
Chong-Bin Zhong, Xi Chen, Xu-Yue Zhou, Xian-Bao Wang
Myocardial infarction (MI) is a serious cardiovascular disease resulting in high rates of morbidity and mortality. Although advances have been made in restoring myocardial perfusion in ischemic areas, decreases in cardiomyocyte death and infarct size are still limited, attributing to myocardial ischemia/reperfusion (I/R) injury. It is necessary to develop therapies to restrict myocardial I/R injury and protect cardiomyocytes against further damage after MI. Many studies have suggested that peroxisome proliferator-activated receptor γ (PPARγ), a ligand-inducible nuclear receptor that predominantly regulates glucose and lipid metabolism, is a promising therapeutic target for ameliorating myocardial I/R injury...
January 1, 2017: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28462209/lung-ischemia-reperfusion-injury-the-therapeutic-role-of-dipeptidyl-peptidase-4-inhibition
#9
REVIEW
Paul A J Beckers, Jan F Gielis, Paul E Van Schil, Dirk Adriaensen
Dipeptidyl peptidase 4 (DPP4) is a cell surface protease that has been reported to play a role in glucose homeostasis, cancer, HIV, autoimmunity, immunology and inflammation. A role for DPP4 in ischemia-reperfusion injury (IRI) in the heart has been established. Dipeptidyl peptidase 4 inhibition (DPP4i) appeared to decrease infarct size, improves cardiac function and promotes myocardial regeneration. Lung ischemia reperfusion injury is caused by a complex mechanism in which macrophages and neutrophils play an important role...
March 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28447747/lycium%C3%A2-barbarum-polysaccharide-exhibits-cardioprotection-in-an-experimental-model-of-ischemia-reperfusion-damage
#10
Ya-Min Hou, Jie Wang, Xian-Zhao Zhang
Cardiovascular diseases are a major cause of mortality and disability worldwide. The present study investigated the cardio-protective effects of polysaccharides extracted from Lycium barbarum (LB), the fruit of which is traditionally used in Chinese medicine. Polysaccharides were characterized using Fourier transform infrared spectroscopy and high‑performance liquid chromatography techniques. The present study demonstrated that LB polysaccharides are composed of glucose and fructose monosaccharides in a molar ratio of 1:2...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28446231/remote-ischemic-preconditioning-differentially-attenuates-post-ischemic-cardiac-arrhythmia-in-streptozotocin-induced-diabetic-versus-nondiabetic-rats
#11
Zhaoyang Hu, Mou Chen, Ping Zhang, Jin Liu, Geoffrey W Abbott
BACKGROUND: Sudden cardiac death (SCD), a leading cause of global mortality, most commonly arises from a substrate of cardiac ischemia, but requires an additional trigger. Diabetes mellitus (DM) predisposes to SCD even after adjusting for other DM-linked cardiovascular pathology such as coronary artery disease. We previously showed that remote liver ischemia preconditioning (RLIPC) is highly protective against cardiac ischemia reperfusion injury (IRI) linked ventricular arrhythmias and myocardial infarction, via induction of the cardioprotective RISK pathway, and specifically, inhibitory phosphorylation of GSK-3β (Ser 9)...
April 26, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28396253/moderate-therapeutic-hypothermia-induces-multimodal-protective-effects-in-oxygen-glucose-deprivation-reperfusion-injured-cardiomyocytes
#12
Jana Krech, Giang Tong, Sylvia Wowro, Christoph Walker, Lisa-Maria Rosenthal, Felix Berger, Katharina Rose Luise Schmitt
OBJECTIVE: Therapeutic hypothermia has been shown to attenuate myocardial cell death due to ischemia/reperfusion injury. However, cellular mechanisms of cooling remain to be elucidated. Especially during reperfusion, mitochondrial dysfunction contributes to cell death by releasing apoptosis inductors. The aim of the present study was to investigate the effects of moderate therapeutic hypothermia (33.5°C) on mitochondrial mediated apoptosis in ischemia/reperfusion-injured cardiomyocytes...
April 8, 2017: Mitochondrion
https://www.readbyqxmd.com/read/28386372/thioredoxin-2-protects-against-oxygen-glucose-deprivation-reperfusion-injury-by-inhibiting-autophagy-and-apoptosis-in-h9c2-cardiomyocytes
#13
Yan-Yan Li, Yin Xiang, Song Zhang, Yan Wang, Jie Yang, Wei Liu, Feng-Tai Xue
The aim of this study is to examine the role of thioredoxin-2 (Trx2) in autophagy and apoptosis during myocardial ischemia-reperfusion (I/R) injury in vitro. We employed the oxygen-glucose deprivation and reperfusion (OGD/R) model of H9c2 cells and used lentiviral infection to overexpress Trx2. H9c2 cell viability and injury assays were conducted using a Cell Counting Kit-8 (CCK-8) and alactate dehydrogenase (LDH) kit. The effects of Trx2 on autophagy and apoptosis were measured by transmission electron microscopy (TEM), western blot, and flow cytometry...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28377726/lysophosphatidic-acid-pretreatment-attenuates-myocardial-ischemia-reperfusion-injury-in-the-immature-hearts-of-rats
#14
Haibo Chen, Si Liu, Xuewen Liu, Jinjing Yang, Fang Wang, Xiangfeng Cong, Xi Chen
The cardioprotection of the immature heart during cardiac surgery remains controversial due to the differences between the adult heart and the newborn heart. Lysophosphatidic acid (LPA) is a small bioactive molecule with diverse functions including cell proliferation and survival via its receptor: LPA1-LPA6. We previously reported that the expressions of LPA1 and LPA3 in rat hearts were much higher in immature hearts and then declined rapidly with age. In this study, we aimed to investigate whether LPA signaling plays a potential protective role in immature hearts which had experienced ischemia/reperfusion (I/R) injury...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28376800/glycemia-and-the-cardioprotective-effects-of-insulin-pre-conditioning-in-the-isolated-rat-heart
#15
Yosuke Nakadate, Hiroaki Sato, Takeshi Oguchi, Tamaki Sato, Akiko Kawakami, Tadahiko Ishiyama, Takashi Matsukawa, Thomas Schricker
BACKGROUND: While acute hyperglycemia has been shown to mitigate the beneficial effects of ischemic preconditioning, its effect on insulin-induced preconditioning remains unclear. METHODS: The study was designed to test the hypothesis that acute hyperglycemia diminishes the cardioprotective effects following a 20-min pre-ischemic pre-conditioning with insulin in the isolated rat heart using the Langendorff system. Forty hearts were assigned to receive modified Krebs-Henseleit (KH) buffer containing 0...
April 4, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28369151/type-1-diabetes-developing-the-first-risk-estimation-model-for-predicting-silent-myocardial-ischemia-the-potential-role-of-insulin-resistance
#16
Gemma Llauradó, Albert Cano, Cristina Hernández, Montserrat González-Sastre, Ato-Antonio Rodríguez, Jordi Puntí, Eugenio Berlanga, Lara Albert, Rafael Simó, Joan Vendrell, José-Miguel González Clemente
OBJECTIVES: The aim of the study was to develop a novel risk estimation model for predicting silent myocardial ischemia (SMI) in patients with type 1 diabetes (T1DM) and no clinical cardiovascular disease, evaluating the potential role of insulin resistance in such a model. Additionally, the accuracy of this model was compared with currently available models for predicting clinical coronary artery disease (CAD) in general and diabetic populations. RESEARCH, DESIGN AND METHODS: Patients with T1DM (35-65years, >10-year duration) and no clinical cardiovascular disease were consecutively evaluated for: 1) clinical and anthropometric data (including classical cardiovascular risk factors), 2) insulin sensitivity (estimate of glucose disposal rate (eGDR)), and 3) SMI diagnosed by stress myocardial perfusion gated SPECTs...
2017: PloS One
https://www.readbyqxmd.com/read/28364393/lipid-emulsion-enhances-cardiac-performance-after-ischemia-reperfusion-in-isolated-hearts-from-summer-active-arctic-ground-squirrels
#17
Michele M Salzman, Qunli Cheng, Richard J Deklotz, Gurpreet K Dulai, Hunter F Douglas, Anna E Dikalova, Dorothee Weihrauch, Brian M Barnes, Matthias L Riess
Hibernating mammals, like the arctic ground squirrel (AGS), exhibit robust resistance to myocardial ischemia/reperfusion (IR) injury. Regulated preference for lipid over glucose to fuel metabolism may play an important role. We tested whether providing lipid in an emulsion protects hearts from summer-active AGS better than hearts from Brown Norway (BN) rats against normothermic IR injury. Langendorff-prepared AGS and BN rat hearts were perfused with Krebs solution containing 7.5 mM glucose with or without 1% Intralipid™...
March 31, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28325730/glucose-oxidation-positively-regulates-glucose-uptake-and-improves-cardiac-function-recovery-after-myocardial-reperfusion
#18
Tingting Li, Jie Xu, Xinghua Qin, Zuoxu Hou, Yongzheng Guo, Zhenhua Liu, Jianjiang Wu, Hong Zheng, Xing Zhang, Feng Gao
Myocardial reperfusion decreases glucose oxidation and uncouples glucose oxidation from glycolysis. Therapies that increase glucose oxidation lessen myocardial ischemia/reperfusion injury. However, the regulation of glucose uptake during reperfusion remains poorly understood. Here we found that glucose uptake was remarkably diminished in myocardium following reperfusion in Sprague-Dawley rats as detected by 18F-labeled and fluorescent-labeled glucose analogs, even though GLUT1 was upregulated by 3 folds and GLUT4 translocation remained unchanged compared with those of sham rats...
March 21, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28303849/effect-of-metabolic-syndrome-score-metabolic-syndrome-and-its-individual-components-on-the-prevalence-and-severity-of-angiographic-coronary-artery-disease
#19
Ming-Hui Gui, Yan Ling, Lin Liu, Jing-Jing Jiang, Xiao-Ying Li, Xin Gao
BACKGROUND: The clinical significance of metabolic syndrome (MS) score, MS, and its individual components with respect to risk prediction of coronary artery disease (CAD) remains unclear. The objective of this study was to investigate whether and to what extent MS score, MS, and its individual components were related to the risk of CAD. METHODS: Among 1191 participants who underwent coronary angiography for the confirmation of suspected myocardial ischemia, 858 were included in this study according to the inclusion criteria from September 2010 to June 2013...
March 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28292026/catalpol-protects-glucose-deprived-rat-embryonic-cardiac-cells-by-inducing-mitophagy-and-modulating-estrogen-receptor
#20
Chao Lin, Ying Lu, Xiaojing Yan, Xiang Wu, Meiyu Kuai, Xin Sun, Qi Chen, Xueyun Kong, Zhaoguo Liu, Yuping Tang, Yi Jing, Yu Li, Qichun Zhang, Huimin Bian
Catalpol, a bioactive component from Rehmannia glutinosa (Di Huang), has been widely used to protect cardiomyocytes against myocardial ischemia. The aim of the present study was to investigate the anti-apoptotic and anti-oxidative effects of Catalpol on glucose-starved H9c2 cells for cardio-protection and to elucidate the underlying mechanisms. Here, we showed that Catalpol protected the glucose-starved H9c2 cells through reducing apoptosis and attenuating oxidative damage. Moreover, the increases of autophagic lysosomes, LC3, autophagic flux and autophagic vacuole were observed in Catalpol-treated cells using flow cytometer and fluorescence microscope...
May 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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