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https://www.readbyqxmd.com/read/29474817/activation-of-the-unfolded-protein-response-downregulates-cardiac-ion-channels-in-human-induced-pluripotent-stem-cell-derived-cardiomyocytes
#1
Man Liu, Guangbin Shi, Anyu Zhou, Cassady E Rupert, Kareen L K Coulombe, Samuel C Dudley
RATIONALE: Heart failure is characterized by electrical remodeling that contributes to arrhythmic risk. The unfolded protein response (UPR) is active in heart failure and can decrease protein levels by increasing mRNA decay, accelerating protein degradation, and inhibiting protein translation. OBJECTIVE: Therefore, we investigated whether the UPR downregulated cardiac ion channels that may contribute to arrhythmogenic electrical remodeling. METHODS: Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) were used to study cardiac ion channels...
February 20, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29474816/coffee-for-cardioprotection-and-longevity
#2
REVIEW
James H O'Keefe, James J DiNicolantonio, Carl J Lavie
Coffee, a complex brew containing hundreds of biologically active compounds, exerts potent effects on long-term human health. Recently, a plethora of studies have been published focusing on health outcomes associated with coffee intake. An inverse association between coffee consumption and all-cause mortality has been seen consistently in large prospective studies. Habitual coffee consumption is also associated with lower risks for cardiovascular (CV) death and a variety of adverse CV outcomes, including coronary heart disease (CHD), congestive heart failure (HF), and stroke; coffee's effects on arrhythmias and hypertension are neutral...
February 20, 2018: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/29474466/preclinical-pharmacology-of-azd9977-a-novel-mineralocorticoid-receptor-modulator-separating-organ-protection-from-effects-on-electrolyte-excretion
#3
Krister Bamberg, Ulrika Johansson, Karl Edman, Lena William-Olsson, Susanna Myhre, Anders Gunnarsson, Stefan Geschwindner, Anna Aagaard, Anna Björnson Granqvist, Frédéric Jaisser, Yufeng Huang, Kenneth L Granberg, Rasmus Jansson-Löfmark, Judith Hartleib-Geschwindner
Excess mineralocorticoid receptor (MR) activation promotes target organ dysfunction, vascular injury and fibrosis. MR antagonists like eplerenone are used for treating heart failure, but their use is limited due to the compound class-inherent hyperkalemia risk. Here we present evidence that AZD9977, a first-in-class MR modulator shows cardio-renal protection despite a mechanism-based reduced liability to cause hyperkalemia. AZD9977 in vitro potency and binding mode to MR were characterized using reporter gene, binding, cofactor recruitment assays and X-ray crystallopgraphy...
2018: PloS One
https://www.readbyqxmd.com/read/29473817/na-h-exchanger-isoform-1-induced-osteopontin-expression-facilitates-cardiac-hypertrophy-through-p90-ribosomal-s6-kinase
#4
Nabeel Abdulrahman, Béatrice Jaspard Vinassa, Larry Fliegel, Ayesha Jabeen, Sadaf Riaz, Alain-Pierre Gadeau, Fatima Mraiche
Cardiovascular diseases are the leading cause of death worldwide. One in three cases of heart failure is due to dilated cardiomyopathy. The Na+ /H+ exchanger isoform 1 (NHE1), a multifunctional protein and the key pH regulator in the heart, has been demonstrated to be increased in this condition. We have previously demonstrated that elevated NHE1 activity induced cardiac hypertrophy in vivo. Furthermore, the overexpression of active NHE1 elicited modulation of gene expression in cardiomyocytes including an upregulation of myocardial osteopontin (OPN) expression...
February 23, 2018: Physiological Genomics
https://www.readbyqxmd.com/read/29473159/developmental-and-degenerative-cardiac-defects-in-the-taiwanese-mouse-model-of-severe-spinal-muscular-atrophy
#5
Gillian K Maxwell, Eva Szunyogova, Hannah K Shorrock, Thomas H Gillingwater, Simon H Parson
Spinal muscular atrophy (SMA), an autosomal recessive disease caused by a decrease in levels of the survival motor neuron (SMN) protein, is the most common genetic cause of infant mortality. Although neuromuscular pathology is the most severe feature of SMA, other organs and tissues, including the heart, are also known to be affected in both patients and animal models. Here, we provide new insights into changes occurring in the heart, predominantly at pre- and early symptomatic ages, in the Taiwanese mouse model of severe SMA...
February 22, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29473044/cardiotoxicity-of-anticancer-therapeutics
#6
REVIEW
Jerry Dong, Hong Chen
As cancer therapeutics continues to improve and progress, the adverse side effects associated with anticancer treatments have also attracted more attention and have become extensively explored. Consequently, the importance of posttreatment follow-ups is becoming increasingly relevant to the discussion. Contemporary treatment methods, such as tyrosine kinase inhibitors, anthracycline chemotherapy, and immunotherapy regimens are effective in treating different modalities of cancers; however, these reagents act through interference with DNA replication or prevent DNA repair, causing endothelial dysfunction, generating reactive oxygen species, or eliciting non-specific immune responses...
2018: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29472009/long-term-change-in-cardiorespiratory-fitness-in-relation-to-atrial-fibrillation-and-heart-failure-from-the-kuopio-ischemic-heart-disease-risk-factor-study
#7
Hassan Khan, Setor K Kunutsor, Rainer Rauramaa, Faisal M Merchant, Jari A Laukkanen
The benefits of aerobic fitness in relation to all-cause and cardiovascular mortality is well established; however, the associations of long-term change in cardiorespiratory fitness (CRF) with incident heart failure (HF) and atrial fibrillation (AF) have not been studied before. The Kuopio Ischaemic Heart Disease Risk Factor Study is a prospective cohort comprising men aged 42 to 60 years from the city of Kuopio and its surroundings, with a baseline examination between 1984 and 1989 (V1), a re-examination at 11 years (V2), and up to 15 years of follow-up from V2...
February 2, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29468529/right-ventricular-dysfunction-and-its-contribution-to-morbidity-and-mortality-in-left-ventricular-heart-failure
#8
REVIEW
Amresh Raina, Talha Meeran
PURPOSE: In patients with left-sided HF, there has been less emphasis on the pathophysiology of the RV in terms of diagnostic evaluation and treatment, versus focus on structural abnormalities of the LV. This review seeks to delineate the importance of RV dysfunction in terms of its contribution to symptomatic limitations and cardiovascular outcomes in patients with left-sided HF. RECENT FINDINGS: Recent studies have demonstrated that RV dysfunction is common in both HFpEF and HFrEF, but more pronounced in HFrEF...
February 21, 2018: Current Heart Failure Reports
https://www.readbyqxmd.com/read/29467667/absence-of-rapid-propagation-through-the-purkinje-network-as-a-potential-cause-of-line-block-in-the-human-heart-with-left-bundle-branch-block
#9
Jun-Ichi Okada, Takumi Washio, Machiko Nakagawa, Masahiro Watanabe, Yoshimasa Kadooka, Taro Kariya, Hiroshi Yamashita, Yoko Yamada, Shin-Ichi Momomura, Ryozo Nagai, Toshiaki Hisada, Seiryo Sugiura
Background: Cardiac resynchronization therapy is an effective device therapy for heart failure patients with conduction block. However, a problem with this invasive technique is the nearly 30% of non-responders. A number of studies have reported a functional line of block of cardiac excitation propagation in responders. However, this can only be detected using non-contact endocardial mapping. Further, although the line of block is considered a sign of responders to therapy, the mechanism remains unclear. Methods: Herein, we created two patient-specific heart models with conduction block and simulated the propagation of excitation based on a cellmodel of electrophysiology...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29467588/pulmonary-arterial-enlargement-is-associated-with-acute-chest-pain-in-patients-without-obstructive-coronary-artery-disease
#10
Narasa Madam, Wassim Mosleh, Natdanai Punnanithinont, Andres Carmona-Rubio, Zaid H Said, Umesh C Sharma
Background: Pulmonary hypertension (PH) is an underdiagnosed cause for chest pain in patients without significant coronary artery disease (CAD). Studies showed that enlarged pulmonary arterial (PA) and right ventricular chamber sizes correlate with the severity of PH. Therefore, we studied the association between chest pain, right ventricular dimensions (RVDs), and PA size on coronary coronary tomographic angiography (CCTA). Methods: The CCTA of 87 patients presenting with chest pain without evidence of obstructive CAD was examined...
2018: Clinical Medicine Insights. Circulatory, Respiratory and Pulmonary Medicine
https://www.readbyqxmd.com/read/29467048/pregnancy-associated-spontaneous-coronary-artery-dissection-pascad-an-etiology-for-chest-pain-in-the-young-peripartum-patient
#11
Richard Lee, David Carr
Cardiac emergencies in pregnancy and the postpartum period are rare but often life-threatening. An emergency physician's differential diagnosis for chest pain in the peripartum patient often includes serious etiologies such as pulmonary embolism or myocardial infarction (MI). A lesser-known but important consideration on the differential for MI is that of a spontaneous coronary artery dissection (SCAD). SCAD is defined as an intramural hematoma within the coronary artery that compresses the true lumen. Expansion by increased pressures may lead to subsequent myocardial ischemia and infarction...
February 22, 2018: CJEM
https://www.readbyqxmd.com/read/29466924/ventriculoatrial-synchrony-induced-heart-failure
#12
Stefan Andric, Dragica Tesic, Dalibor Somer, Ilija Srdanovic, Tatjana Miljkovic, Djordje G Jakovljevic, Lazar Velicki
OBJECTIVE AND IMPORTANCE: Endless loop tachycardia or pacemaker-mediated tachycardia, and atrioventricular desynchronization arrhythmia or repetitive non-reentrant ventriculoatrial synchrony (RNRVAS) are two forms of reverse impulse conduction - ventriculoatrial (VA) synchrony. Although VA synchrony can theoretically cause aggravation of heart failure, clinical cases describing severe consequential heart failure are lacking. CLINICAL PRESENTATION AND INTERVENTION: We describe a case of a 60-year-old patient who underwent primary percutaneous coronary intervention and mitral valve surgery...
February 21, 2018: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29466490/heart-transplantation-for-peripartum-cardiomyopathy-a-single-center-experience
#13
Nadia Bouabdallaoui, Pierre Demondion, Sylvestre Maréchaux, Shaida Varnous, Guillaume Lebreton, Frédéric Mouquet, Pascal Leprince
BACKGROUND: Peripartum cardiomyopathy is an idiopathic disorder defined by the occurrence of acute heart failure during late pregnancy or post-partum period in the absence of any other definable cause. Its clinical course is variable and severe cases might require heart transplantation. OBJECTIVE: To investigate long-term outcomes after heart transplantation (HT) for peripartum cardiomyopathy (PPCM). METHODS: Out of a single-center series of 1938 HT, 14 HT were performed for PPCM...
February 19, 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29466447/role-of-t1-mapping-as-a-complementary-tool-to-t2-for-non-invasive-cardiac-iron-overload-assessment
#14
Camilla Torlasco, Elena Cassinerio, Alberto Roghi, Andrea Faini, Marco Capecchi, Amna Abdel-Gadir, Cristina Giannattasio, Gianfranco Parati, James C Moon, Maria D Cappellini, Patrizia Pedrotti
BACKGROUND: Iron overload-related heart failure is the principal cause of death in transfusion dependent patients, including those with Thalassemia Major. Linking cardiac siderosis measured by T2* to therapy improves outcomes. T1 mapping can also measure iron; preliminary data suggests it may have higher sensitivity for iron, particularly for early overload (the conventional cut-point for no iron by T2* is 20ms, but this is believed insensitive). We compared T1 mapping to T2* in cardiac iron overload...
2018: PloS One
https://www.readbyqxmd.com/read/29466174/-pharmacological-properties-of-loop-diuretics-and-their-clinical-effects
#15
G Sakalauskienė, G Civinskienė, A Antuševas, P Civinskas
Edematous states caused by an excessesive extracellular fluid retention are major components of cardiovascular and renal disorders including chronic kidney disease, nephrotic syndrome, and heart failure. The use of diuretic drugs from various groups including loop duiretics are important means of pharmacological correction of these clinical conditions. Moreover, diuretics used to lower bood pressure as a part of antihypertensive treatment, reduce cardiovascular events. The response of patients to the dose of a diuretic is reflected by a sigmoid dose-response curve which can be affected by changes of sodium content in the body...
January 2018: Kardiologiia
https://www.readbyqxmd.com/read/29465066/prognostic-utility-of-the-n-terminal-prohormone-of-brain-natriuretic-peptide-and-the-modified-model-for-end-stage-liver-disease-in-patients-with-end-stage-heart-failure
#16
Wioletta Szczurek, Bożena Szyguła-Jurkiewicz, Michał Zakliczyński, Bogumiła Król, Mariusz Gąsior, Marian Zembala
INTRODUCTION The N terminal prohormone of brain natriuretic peptide (NT proBNP) is secreted by cardiomyocytes in response to increased wall stress resulting from pressure and volume overload. The modified Model for End Stage Liver Disease (modMELD) scale reflects the systemic effect of heart failure (HF), which includes end-organ congestion and subsequent hepatic and renal dysfunction. OBJECTIVES The aim of this study was to assess the prognostic accuracy of NT proBNP and the modMELD score, as well as to compare their usefulness in the risk stratification of patients with end-stage HF awaiting orthotopic heart transplantation (OHT)...
February 21, 2018: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/29464879/insights-into-implementation-of-sacubitril-valsartan-into-clinical-practice
#17
Pieter Martens, Hanne Beliën, Matthias Dupont, Wilfried Mullens
BACKGROUND: Sacubitril/valsartan significantly reduced heart failure hospitalization and mortality in PARADIGM-HF (Prospective Comparison of Angiotensin Receptor-Neprilysin Inhibitor With an Angiotensin-Converting Enzyme Inhibitor to Determine Impact on Global Mortality and Morbidity in Heart Failure). However, real-world data from its use are lacking. METHODS AND RESULTS: We retrospectively assessed all baseline and follow-up data of consecutive heart failure patients with reduced ejection fraction receiving therapy with sacubitril/valsartan for Class I recommendation between December 2016 and July 2017...
February 21, 2018: ESC Heart Failure
https://www.readbyqxmd.com/read/29464565/ryanodine-receptor-structure-and-function-in-health-and-disease
#18
Gaetano Santulli, Daniel Lewis, Amedee des Georges, Andrew R Marks, Joachim Frank
Ryanodine receptors (RyRs) are ubiquitous intracellular calcium (Ca2+ ) release channels required for the function of many organs including heart and skeletal muscle, synaptic transmission in the brain, pancreatic beta cell function, and vascular tone. In disease, defective function of RyRs due either to stress (hyperadrenergic and/or oxidative overload) or genetic mutations can render the channels leaky to Ca2+ and promote defective disease-causing signals as observed in heat failure, muscular dystrophy, diabetes mellitus, and neurodegerative disease...
2018: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/29464221/a-young-puerperal-woman-presenting-to-emergency-department-with-severe-dyspnea
#19
Adnan Yamanoglu, Nalan Gokce Celebi Yamanoglu, Sumeyye Cakmak, Ozgur Sogut
Peripartum cardiomyopathy (PPCM) is an idiopathic cardiomyopathy presenting with heart failure (HF) secondary to left ventricular systolic dysfunction towards the end of pregnancy or in the months following delivery, where no other cause of HF is found. The symptoms and signs of this rare disorder mimic those of the physiological changes of pregnancy or other cardiovascular diseases. Consequently, its diagnosis is frequently delayed, which worsens an already poor prognosis. Here, we report a young adult who was diagnosed with PPCM, early, with the help of focused cardiac ultrasonography, performed after presenting to the emergency department with nonspecific respiratory complaints, including dyspnea and hemoptysis, which suggested at first pulmonary embolism...
December 2017: Turkish Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29463269/telomere-attrition-in-heart-failure-a-flow-fish-longitudinal-analysis-of-circulating-monocytes
#20
Iris Teubel, Elena Elchinova, Santiago Roura, Marco A Fernández, Carolina Gálvez-Montón, Pedro Moliner, Marta de Antonio, Josep Lupón, Antoni Bayés-Genís
BACKGROUND: Cross-sectional investigations report shorter telomeres in patients with heart failure (HF); however, no studies describe telomere length (TL) trajectory and its relationship with HF progression. Here we aimed to investigate telomere shortening over time and its relationship to outcomes. METHODS: Our study cohort included 101 ambulatory patients with HF. Blood samples were collected at baseline (n = 101) and at the 1-year follow-up (n = 54). Using flow-FISH analysis of circulating monocytes, we simultaneously measured three monocyte subsets-classical (CD14++ CD16- ), intermediate (CD14++ CD16+ ), and nonclassical (CD14+ CD16++ )-and their respective TLs based on FITC-labeled PNA probe hybridization...
February 20, 2018: Journal of Translational Medicine
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