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https://www.readbyqxmd.com/read/29666470/glucose-regulated-protein-78-is-essential-for-cardiac-myocyte-survival
#1
Xiaoding Wang, Xukun Bi, Guangyu Zhang, Yingfeng Deng, Xiang Luo, Lin Xu, Philipp E Scherer, Anwarul Ferdous, Guosheng Fu, Thomas G Gillette, Amy S Lee, Xuejun Jiang, Zhao V Wang
Secretory and transmembrane proteins rely on proper function of the secretory pathway for folding, posttranslational modification, assembly, and secretion. Accumulation of misfolded proteins in the endoplasmic reticulum (ER) stimulates the unfolded protein response (UPR), which communicates between the ER and other organelles to enhance ER-folding capacity and restore cellular homeostasis. Glucose-regulated protein of 78 kDa (GRP78), an ER-resident protein chaperone, is a master regulator of all UPR signaling branches...
April 17, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29666426/cardiac-hypertrophy-limits-infarct-expansion-after-myocardial-infarction-in-mice
#2
Siiri E Iismaa, Ming Li, Scott Kesteven, Jianxin Wu, Andrea Y Chan, Sara R Holman, John W Calvert, Ahtesham Ul Haq, Amy M Nicks, Nawazish Naqvi, Ahsan Husain, Michael P Feneley, Robert M Graham
We have previously demonstrated that adult transgenic C57BL/6J mice with CM-restricted overexpression of the dominant negative W v mutant protein (dn-c-kit-Tg) respond to pressure overload with robust cardiomyocyte (CM) cell cycle entry. Here, we tested if outcomes after myocardial infarction (MI) due to coronary artery ligation are improved in this transgenic model. Compared to non-transgenic littermates (NTLs), adult male dn-c-kit-Tg mice displayed CM hypertrophy and concentric left ventricular (LV) hypertrophy in the absence of an increase in workload...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666096/devil-is-in-the-detail
#3
John Roshan Jacob, Amal Paul, Anoop George Alex
A 15-year-old girl of Asian origin, hailing from a rural agrarian background, presented with history of multiple episodes of dizziness for 3 years. The episodes were precipitated mostly by emotional and/or physical stress and relieved on lying down, with a few episodes culminating in transient loss of consciousness. As preliminary cardiac and neurological evaluation were normal, she was being treated by the primary physician as a case of probable psychogenic syncope, supported by the consistent association of the episodes with emotional stress...
April 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29662512/prediction-of-sudden-death-in-elderly-patients-with-heart-failure
#4
REVIEW
Ana Ayesta, Helena Martínez-Sellés, Antonio Bayés de Luna, Manuel Martínez-Sellés
Most heart failure (HF) related mortality is due to sudden cardiac death (SCD) and worsening HF, particularly in the case of reduced ejection fraction. Predicting and preventing SCD is an important goal but most works include no or few patients with advanced age, and the prevention of SCD in elderly patients with HF is still controversial. A recent reduction in the annual rate of SCD has been recently described but it is not clear if this is also true in advanced age patients. Age is associated with SCD, although physicians frequently have the perception that elderly patients with HF die mainly of pump failure, underestimating the importance of SCD...
February 2018: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/29658608/ipsc%C3%A2-msc-inhibition-assessment-in-raw-264-7-cells-following-oxygen-and-glucose-deprivation-reveals-a-distinct-function-for-cardiopulmonary-resuscitation
#5
Yi Yu, Dongping Wang, Hui Li, Yujie Liu, Zhao Xiang, Junlin Wu, Xiaoli Jing
Hypoxia is a serious stress state. The nervous system is less tolerant to hypoxia, and cell death due to hypoxia is irreversible. With the incidence of cardiovascular disease gradually increasing, the sudden cardiac death rate is additionally increasing. Although cardiopulmonary resuscitation (CPR) is an important development, recovery is frequently poor. In a successful recovery population, ~40% of the population was in a vegetative state or subsequently succumbed to their condition, and ~20% had brain damage...
April 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29656335/role-of-microglia-under-cardiac-and-cerebral-ischemia-reperfusion-i-r-injury
#6
REVIEW
Poomarin Surinkaew, Passakorn Sawaddiruk, Nattayaporn Apaijai, Nipon Chattipakorn, Siriporn C Chattipakorn
Both cerebral and cardiac ischemia causes loss of cerebral blood flow, which may lead to neuronal cell damage, neurocognitive impairment, learning and memory difficulties, neurological deficits, and brain death. Although reperfusion is required immediately to restore the blood supply to the brain, it could lead to several detrimental effects on the brain. Several studies demonstrate that microglia activity increases following cerebral and cardiac ischemic/reperfusion (I/R) injury. However, the effects of microglial activation in the brain following I/R remains unclear...
April 14, 2018: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29650708/outcomes-in-asymptomatic-severe-aortic-stenosis-with-preserved-ejection-fraction-undergoing-rest-and-treadmill-stress-echocardiography
#7
Chetan P Huded, Ahmad Masri, Kenya Kusunose, Andrew L Goodman, Richard A Grimm, A Marc Gillinov, Douglas R Johnston, L Leonardo Rodriguez, Zoran B Popovic, Lars G Svensson, Brian P Griffin, Milind Y Desai
BACKGROUND: In asymptomatic patients with severe aortic stenosis and preserved left ventricular ejection fraction, we sought to assess the incremental prognostic value of resting valvuloarterial impedence (Zva) and left ventricular global longitudinal strain (LV-GLS) to treadmill stress echocardiography. METHODS AND RESULTS: We studied 504 such patients (66±12 years, 78% men, 32% with coronary artery disease who underwent treadmill stress echocardiography between 2001 and 2012...
April 12, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29643974/sirt3-a-new-regulator-of-cardiovascular-diseases
#8
REVIEW
Wei Sun, Caixia Liu, Qiuhui Chen, Ning Liu, Youyou Yan, Bin Liu
Cardiovascular diseases (CVDs) are the leading causes of death worldwide, and defects in mitochondrial function contribute largely to the occurrence of CVDs. Recent studies suggest that sirtuin 3 (SIRT3), the mitochondrial NAD+ -dependent deacetylase, may regulate mitochondrial function and biosynthetic pathways such as glucose and fatty acid metabolism and the tricarboxylic acid (TCA) cycle, oxidative stress, and apoptosis by reversible protein lysine deacetylation. SIRT3 regulates glucose and lipid metabolism and maintains myocardial ATP levels, which protects the heart from metabolic disturbances...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29642718/psychotropic-pharmacotherapy-associated-with-qt-prolongation-among-veterans-with-posttraumatic-stress-disorder
#9
Eileen M Stock, John E Zeber, Catherine J McNeal, Javier E Banchs, Laurel A Copeland
BACKGROUND: In 2012, the Food and Drug Administration issued Drug Safety Communications on several drugs associated with QT prolongation and fatal ventricular arrhythmias. Among these was citalopram, a selective serotonin reuptake inhibitor (SSRI) approved for depression and commonly used for posttraumatic stress disorder (PTSD). Evaluation of the risk for QT prolongation among other psychotropic drugs for individuals with PTSD remains limited. OBJECTIVE: Explore psychotropic drugs associated with QT prolongation among veterans with PTSD...
April 1, 2018: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/29629998/predictive-and-prognostic-value-of-left-ventricular-mechanical-dyssynchrony-assessed-by-myocardial-perfusion-single-photon-emission-computed-tomography-in-asymptomatic-patients-under-hemodialysis
#10
Federico Caobelli, Cristina E Popescu, Riccardo Laudicella, Alessio Comis, Salvatore A Pignata, Roberto Sara, Claudio Rossetti
BACKGROUND: Patients under hemodialysis (HD) have an increased risk of major adverse cardiac events (MACEs). In these patients, myocardial perfusion scintigraphy (MPS) provides useful prognostic information. Left ventricular mechanical dyssynchrony (LVD) has been proven to predict all-cause death in patients under HD. It remains unclear, whether the same prognostic value pertains also to the prediction of MACEs. PATIENTS AND METHODS: Ninety patients under HD (duration range: 2-216 months) with neither history nor symptoms of coronary artery disease at the time of MPS were retrospectively evaluated...
May 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29627307/abnormal-myocardial-dietary-fatty-acid-metabolism-and-diabetic-cardiomyopathy
#11
REVIEW
André C Carpentier
Patients with diabetes are at very high risk of hospitalization and death from heart failure. Increased prevalence of coronary heart disease, hypertension, autonomic neuropathy, and kidney failure all play a role in this increased risk. However, cardiac metabolic abnormalities are now recognized to play a role in this increased risk. Increased reliance on fatty acids to produce energy might predispose the diabetic heart to oxidative stress and ischemic damage. Intramyocellular accumulation of toxic lipid metabolites leads to a number of cellular abnormalities that might also contribute to cardiac remodelling and cardiac dysfunction...
January 16, 2018: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/29627073/stress-cognitive-appraisal-coping-and-event-free-survival-in-patients-with-heart-failure
#12
Abdullah S Alhurani, Rebecca Dekker, Muayyad Ahmad, Jennifer Miller, Khalil M Yousef, Basel Abdulqader, Ibrahim Salami, Terry A Lennie, David C Randall, Debra K Moser
OBJECTIVES: To describe self-reported stress level, cognitive appraisal and coping among patients with heart failure (HF), and to examine the association of cognitive appraisal and coping strategies with event-free survival. METHODS: This was a prospective, longitudinal, descriptive study of patients with chronic HF. Assessment of stress, cognitive appraisal, and coping was performed using Perceived Stress Scale, Cognitive Appraisal Health Scale, and Brief COPE scale, respectively...
April 4, 2018: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/29625885/prognostic-value-of-transthoracic-doppler-echocardiography-coronary-flow-velocity-reserve-in-patients-with-nonculprit-stenosis-of-intermediate-severity-early-after-primary-percutaneous-coronary-intervention
#13
Milorad Tesic, Ana Djordjevic-Dikic, Vojislav Giga, Jelena Stepanovic, Milan Dobric, Ivana Jovanovic, Marija Petrovic, Zlatko Mehmedbegovic, Dejan Milasinovic, Vladimir Dedovic, Milorad Zivkovic, Stefan Juricic, Dejan Orlic, Sinisa Stojkovic, Vladan Vukcevic, Goran Stankovic, Milan Nedeljkovic, Miodrag Ostojic, Branko Beleslin
BACKGROUND: Treatment of nonculprit coronary stenosis during primary percutaneous coronary intervention in patients with ST-segment elevation myocardial infarction may be beneficial, but the mode and timing of the intervention are still controversial. The aim of this study was to examine the significance and prognostic value of preserved coronary flow velocity reserve (CFVR) in patients with nonculprit intermediate stenosis early after primary percutaneous coronary intervention. METHODS: Two hundred thirty patients with remaining intermediate (50%-70%) stenosis of non-infarct-related arteries, in whom CFVR was performed within 7 days after primary percutaneous coronary intervention, were prospectively enrolled...
April 3, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29625884/integration-of-wall-motion-coronary-flow-velocity-and-left-ventricular-contractile-reserve-in-a-single-test-prognostic-value-of-vasodilator-stress-echocardiography-in-patients-with-diabetes
#14
Lauro Cortigiani, Alda Huqi, Quirino Ciampi, Tonino Bombardini, Francesco Bovenzi, Eugenio Picano
BACKGROUND: Coronary flow velocity reserve (CFVR) and left ventricular contractile reserve (LVCR) have demonstrated prognostic importance in patients with diabetes. The aim of this study was to investigate the prognostic contribution of combined evaluation of CFVR and LVCR in patients with diabetes with nonischemic stress echocardiography. METHODS: Three hundred seventy-five patients with diabetes (mean age, 68 ± 9 years) with nonischemic dipyridamole stress echocardiography underwent assessment of CFVR of the left anterior descending coronary artery (prospectively) and LVCR with left ventricular force (retrospectively) in a multicenter study...
April 3, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29623672/a-systematic-review-on-the-protective-effect-of-n-acetyl-cysteine-against-diabetes-associated-cardiovascular-complications
#15
REVIEW
Phiwayinkosi V Dludla, Stephanie C Dias, Nnini Obonye, Rabia Johnson, Johan Louw, Bongani B Nkambule
INTRODUCTION: Heart failure is the leading cause of death in patients with diabetes. No treatment currently exists to specifically protect these patients at risk of developing cardiovascular complications. Accelerated oxidative stress-induced tissue damage due to persistent hyperglycemia is one of the major factors implicated in deteriorated cardiac function within a diabetic state. N-acetyl cysteine (NAC), through its enhanced capacity to endogenously synthesize glutathione, a potent antioxidant, has displayed abundant health-promoting properties and has a favorable safety profile...
April 6, 2018: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/29610596/catecholaminergic-polymorphic-ventricular-tachycardia-looking-to-the-future
#16
Andreea Elena Velcea, Calin Siliste, Dragos Vinereanu
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare inheritable cardiac disorder, characterized by polymorphic ventricular tachycardia (PVT) or bidirectional ventricular tachycardia, triggered by adrenergic stress, and manifested most frequently as syncope or sudden cardiac death. The disease has a heterogeneous genetic basis, with mutations in the genes encoding the ryanodine and calsequestrin channels accounting for the majority of cases. The diagnosis of CPVT is established in individuals with polymorphic ventricular premature beats, PVT or bidirectional ventricular tachycardia documented during exercise or adrenergic stress, who have a structurally normal heart and normal resting ECG...
December 2017: Mædica
https://www.readbyqxmd.com/read/29605388/emerging-actors-in-diabetic-cardiomyopathy-heartbreaker-biomarkers-or-therapeutic-targets
#17
REVIEW
Xavier Palomer, Javier Pizarro-Delgado, Manuel Vázquez-Carrera
The diabetic heart is characterized by metabolic disturbances that are often accompanied by local inflammation, oxidative stress, myocardial fibrosis, and cardiomyocyte apoptosis. Overall changes result in contractile dysfunction, concentric left ventricular (LV) hypertrophy, and dilated cardiomyopathy, that together affect cardiac output and eventually lead to heart failure, the foremost cause of death in diabetic patients. There are currently several validated biomarkers for the diagnosis and risk assessment of cardiac diseases, but none is capable of discriminating patients with diabetic cardiomyopathy (DCM)...
March 28, 2018: Trends in Pharmacological Sciences
https://www.readbyqxmd.com/read/29601906/melatonin-therapy-for-diabetic-cardiomyopathy-a-mechanism-involving-syk-mitochondrial-complex-i-serca-pathway
#18
Hao Zhou, Yan Yue, Jin Wang, Qiang Ma, Yundai Chen
Melatonin and its metabolites have been demonstrated to modulate the glucose, dyslipidemia and other metabolic disorders. This study aimed to explore a novel mechanism responsible for diabetic cardiomyopathy development, and also validated whether melatonin played a protective role in repairing damaged heart in the diabetes setting. Our data demonstrated that spleen tyrosine kinase (Syk) was activated by chronic high-glucose stimulus and contributed to the development of diabetic cardiomyopathy. However, genetic ablation of Syk or supplementation of melatonin to inhibit Syk activation improved diabetic myocardial function, reduced cardiac fibrosis and preserved cardiomyocytes viability...
March 28, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29598865/pet-assessment-of-epicardial-intimal-disease-and-microvascular-dysfunction-in-cardiac-allograft-vasculopathy
#19
Sharon Chih, Aun Yeong Chong, Fernanda Erthal, Robert A deKemp, Ross A Davies, Ellamae Stadnick, Derek Y So, Christopher Overgaard, George Wells, Lisa M Mielniczuk, Rob S B Beanlands
BACKGROUND: Cardiac allograft vasculopathy (CAV) is a leading cause of graft failure and death after heart transplantation. Absolute myocardial blood flow (MBF) quantification using rubidium 82 (Rb-82) positron emission tomography (PET) could enable evaluation of diagnostically challenging diffuse epicardial and microvascular disease in CAV. OBJECTIVES: The authors aimed to evaluate Rb-82 PET detection of CAV. METHODS: Consecutive transplant recipients undergoing coronary angiography were prospectively evaluated with PET, multivessel intravascular ultrasound (IVUS), and intracoronary hemodynamics...
April 3, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29595056/live-cell-imaging-in-microfluidic-device-proves-resistance-to-oxygen-glucose-deprivation-in-hips-cms
#20
Sebastian Martewicz, Giulia Gabrel, Marika Campesan, Marcella Canton, Fabio Di Lisa, Nicola Elvassore
Analyses of cellular responses to fast oxygen dynamics are challenging and require ad hoc technological solutions, especial-ly when decoupling from liquid media composition is required. In this work, we present a microfluidic device specifically designed for culture analyses with high resolution and magnification objectives, providing full optical access to the cell cul-ture chamber. This feature allows fluorescence-based assays, photo-activated surface chemistry and live cell imaging under tightly controlled pO2 environments...
March 29, 2018: Analytical Chemistry
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