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https://www.readbyqxmd.com/read/28525390/microrna-155-attenuates-late-sepsis-induced-cardiac-dysfunction-through-jnk-and-%C3%AE-arrestin-2
#1
Yu Zhou, Yan Song, Zahir Shaikh, Hui Li, Haiju Zhang, Yi Caudle, Shouhua Zheng, Hui Yan, Dan Hu, Charles Stuart, Deling Yin
Cardiac dysfunction is correlated with detrimental prognosis of sepsis and contributes to a high risk of mortality. After an initial hyperinflammatory reaction, most patients enter a protracted state of immunosuppression (late sepsis) that alters both innate and adaptive immunity. The changes of cardiac function in late sepsis are not yet known. MicroRNA-155 (miR-155) is previously found to play important roles in both regulations of immune activation and cardiac function. In this study, C57BL/6 mice were operated to develop into early and late sepsis phases, and miR-155 mimic was injected through the tail vein 48 h after cecal ligation and puncture (CLP)...
May 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28515693/rolipram-improves-outcome-in-a-rat-model-of-infant-sepsis-induced-cardiorenal-syndrome
#2
Clark R Sims, Sharda P Singh, Shengyu Mu, Neriman Gokden, Dala Zakaria, Trung C Nguyen, Philip R Mayeux
While the mortality rate associated with sepsis in children has fallen over the years, it still remains unacceptably high. The development of both acute cardiac dysfunction and acute kidney injury during severe sepsis is categorized as type 5 cardiorenal syndrome (CRS) and is poorly understood in infants. To address this lack of understanding and the need for an appropriate animal model in which to conduct relevant preclinical studies, we developed a model of infant sepsis-induced CRS in rat pups then evaluated the therapeutic potential of the phosphodiesterase (PDE) 4 inhibitor, rolipram...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28513656/restoring-the-biophysical-properties-of-decellularized-patches-through-recellularization
#3
Gigi Chi Ting Au-Yeung, Udi Sarig, Hadar Sarig, Hanumakumar Bogireddi, Tomer Bronshtein, Limor Baruch, Avihai Spizzichino, Jacob Bortman, Boey Yin Chiang Freddy, Marcelle Machluf, Subbu S Venkatraman
Various extracellular matrix (ECM) scaffolds, isolated through decellularization, were suggested as ideal biomimetic materials for 'Functional tissue engineering' (FTE). The decellularization process comprises a compromise between damaging and preserving the ultrastructure and composition of ECM-previously shown to affect cell survival, proliferation, migration, organization, differentiation and maturation. Inversely, the effects of cells on the ECM constructs' biophysical properties, under physiological-like conditions, remain still largely unknown...
May 17, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28512720/pacing-induced-ventricular-dysfunction-in-a-child-improvement-with-reduction-in-paced-rate
#4
Shilpi Garg, Seshadri Balaji
Right ventricular (RV) pacing can be associated with impairment of left ventricular (LV) function due to electrical dyssynchrony and myocardial remodeling (Janousek et al. in J Cardiovasc Electrophysiol 15:470-474, 2004). RV-pacing induced ventricular dysfunction is reversible by techniques such as biventricular pacing and LV apical or LV free wall pacing or turning the pacemaker off which have all been shown to restore synchrony and improve left ventricular function (Janousek et al. in J Cardiovasc Electrophysiol 15:470-474, 2004; Geldorp et al...
May 17, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28512107/divergent-requirements-for-ezh1-in-heart-development-versus-regeneration
#5
Shanshan Ai, Xianhong Yu, Yumei Li, Yong Peng, Chen Li, Yanzhu Yue, Ge Tao, Chuan-Yun Li, William T Pu, Aibin He
Rationale: Polycomb repressive complex 2 (PRC2) is a major epigenetic repressor that deposits methylation on histone H3 on lysine 27 (H3K27me) and controls differentiation and function of many cells, including cardiac myocytes. EZH1 and EZH2 are two alternative catalytic subunits with partial functional redundancy. The relative roles of EZH1 and EZH2 in heart development and regeneration are unknown. Objective: We compared the roles of EZH1 versus EZH2 in heart development and neonatal heart regeneration. Methods and Results: Heart development was normal in Ezh1(-/-) (E1KO) and Ezh2(f/f)::cTNT(-Cre) (E2KO) embryos...
May 16, 2017: Circulation Research
https://www.readbyqxmd.com/read/28511331/-percutaneous-ventricular-restoration-for-patients-with-left-ventricular-aneurysm-and-heart-failure-after-myocardial-infarction-4-cases-report
#6
H Gao, B Yang, Y Huo
No abstract text is available yet for this article.
May 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28511027/ross-konno-procedure-with-cylinder-mitral-valve-replacement-in-49-days-old-infant
#7
Oleg Fedevych, Oleksandr Yachnik, Yaroslav Mykychak, Yaroslav Ivanov, Olga Borodinova, Illya Yemets
A neonate with antenatally diagnosed severe aortic valve stenosis, left ventricular outflow tract obstruction, left ventricular endocardial fibroelastosis, and severe mixed mitral valve disease was admitted to our center for balloon aortic valvuloplasty. On day 49, we performed a Ross-Konno procedure and mitral valve replacement on the baby, whose weight was 3.4 kg. Right ventricle-to-pulmonary artery continuity was restored with a handmade trileaflet Gore-Tex conduit. We used a handmade cylindrical prosthesis made from decellularized equine pericardium in the mitral position...
January 1, 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28500127/the-efficacy-of-hyperbaric-oxygen-therapy-in-the-treatment-of-central-retinal-artery-occlusion
#8
Andreia Soares, Nuno L Gomes, Luís Mendonça, Carla Ferreira
Central retinal artery occlusion (CRAO) is an ophthalmological emergency. Various treatment modalities have been tried, but none have shown to alter natural history of the disease. Hyperoxia can restore retinal oxygenation, and favourable results were obtained with hyperbaric oxygen therapy (HBOT). We report two patients with sudden visual loss due to CRAO treated with HBOT. Case 1: a 61-year-old female, presented with CRAO in her left eye(OS). She was submitted to eight sessions of HBOT(2.4atmosphere absolute (ATA))...
May 12, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28497395/cardio-protective-effects-of-qishen-granule-on-sarcoplasmic-reticulum-ca-2-handling-in-heart-failure-rats
#9
Ling-Hui Lu, Chun Li, Qi-Yan Wang, Qian Zhang, Yi Zhang, Hui Meng, Yong Wang, Wei Wang
OBJECTIVES: To assess the effects of Qishen Granule (, QSG) on sarcoplasmic reticulum (SR) Ca(2+) handling in heart failure (HF) model of rats and to explore the underlying molecular mechanisms. METHODS: HF rat models were induced by left anterior descending coronary artery ligation surgery and high-fat diet feeding. Rats were randomly divided into sham (n=10), model (n=10), QSG (n=12, 2.2 g/kg daily) and metoprolol groups (n=12, 10.5 mg/kg daily). The therapeutic effects of QSG were evaluated by echocardiography and blood lipid testing...
May 11, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28487390/activation-of-the-amino-acid-response-pathway-blunts-the-effects-of-cardiac-stress
#10
Pu Qin, Pelin Arabacilar, Roberta E Bernard, Weike Bao, Alan R Olzinski, Yuanjun Guo, Hind Lal, Stephen H Eisennagel, Michael C Platchek, Wensheng Xie, Julius Del Rosario, Mohamad Nayal, Quinn Lu, Theresa Roethke, Christine G Schnackenberg, Fe Wright, Michael P Quaile, Wendy S Halsey, Ashley M Hughes, Ganesh M Sathe, George P Livi, Robert B Kirkpatrick, Xiaoyan A Qu, Deepak K Rajpal, Maria Faelth Savitski, Marcus Bantscheff, Gerard Joberty, Giovanna Bergamini, Thomas L Force, Gregory J Gatto, Erding Hu, Robert N Willette
BACKGROUND: The amino acid response (AAR) is an evolutionarily conserved protective mechanism activated by amino acid deficiency through a key kinase, general control nonderepressible 2. In addition to mobilizing amino acids, the AAR broadly affects gene and protein expression in a variety of pathways and elicits antifibrotic, autophagic, and anti-inflammatory activities. However, little is known regarding its role in cardiac stress. Our aim was to investigate the effects of halofuginone, a prolyl-tRNA synthetase inhibitor, on the AAR pathway in cardiac fibroblasts, cardiomyocytes, and in mouse models of cardiac stress and failure...
May 9, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28476756/indie-hfpef-inorganic-nitrite-delivery-to-improve-exercise-capacity-in-heart-failure-with-preserved-ejection-fraction-rationale-and-design
#11
Yogesh N V Reddy, Gregory D Lewis, Sanjiv J Shah, Martin LeWinter, Marc Semigran, Victor G Davila-Roman, Kevin Anstrom, Adrian Hernandez, Eugene Braunwald, Margaret M Redfield, Barry A Borlaug
Approximately half of patients with heart failure have preserved ejection fraction. There is no proven treatment that improves outcome. The pathophysiology of heart failure with preserved ejection fraction is complex and includes left ventricular systolic and diastolic dysfunction, pulmonary vascular disease, endothelial dysfunction, and peripheral abnormalities. Multiple lines of evidence point to impaired nitric oxide (NO)-cGMP bioavailability as playing a central role in each of these abnormalities. In contrast to traditional organic nitrate therapies, an alternative strategy to restore NO-cGMP signaling is via inorganic nitrite...
May 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28470998/percutaneous-transcatheter-balloon-dilatation-and-stenting-to-the-inflow-cannula-stenosis-of-a-left-ventricular-assist-device
#12
Stephen M Carr, Dieter F Lubbe, Philip R Huber
Left ventricular assist devices (LVAD) improve survival in patients with advanced heart failure but are prone to various complications causing mechanical failure. Inflow cannula stenosis presents a particular challenge often requiring invasive surgical repair. We present a novel transcatheter approach for stent delivery to successfully restore hemodynamic function in a patient with inflow cannula stenosis of a HeartMate II LVAD. © 2017 Wiley Periodicals, Inc.
May 4, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28464769/adult-stem-cell-therapy-for-cardiac-repair-in-patients-after-acute-myocardial-infarction-leading-to-ischemic-heart-failure-an-overview-of-evidence-from-the-recent-clinical-trials
#13
Rygiel Katarzyna
Cardiovascular diseases (CVD) still represent the leading cause of mortality worldwide, despite the remarkable advances in interventional cardiology, cardiac surgery, and modern pharmacotherapy, particularly in the setting of acute myocardial infarction (AMI), chronic ischemic heart failure (HF), cardiomyopathy (CM), and the associated left ventricular (LV) dysfunction. A significant loss of cardiomyocytes that underlies all of these conditions was previously considered irreversible. However, current evidence indicates that the human heart has some potential for repair, and over the past decade, many research studies have been exploring the use of stem cells (SCs) to facilitate restoration of myocardium...
May 1, 2017: Current Cardiology Reviews
https://www.readbyqxmd.com/read/28459804/transplantation-of-hgf-gene-engineered-skeletal-myoblasts-improve-infarction-recovery-in-a-rat-myocardial-ischemia-model
#14
Shu-Ling Rong, Xiao-Lin Wang, Cui-Ying Zhang, Zhuo-Hui Song, Lu-Hua Cui, Xiao-Feng He, Xu-Jiong Li, Hui-Jin Du, Bao Li
BACKGROUND: Skeletal myoblast transplantation seems a promising approach for the repair of myocardial infarction (MI). However, the low engraftment efficacy and impaired angiogenic ability limit the clinical efficiency of the myoblasts. Gene engineering with angiogenic growth factors promotes angiogenesis and enhances engraftment of transplanted skeletal myoblasts, leading to improved infarction recovery in myocardial ischemia. The present study evaluated the therapeutic effects of hepatocyte growth factor (HGF) gene-engineered skeletal myoblasts on tissue regeneration and restoration of heart function in a rat MI model...
2017: PloS One
https://www.readbyqxmd.com/read/28435004/improvements-in-left-ventricular-diastolic-mechanics-after-parachute-device-implantation-in-patients-with-ischemia-heart-failure-a-cardiac-ct-study
#15
Chun-Ho Yun, Jing-Yi Sun, Barry Templin, Shih-Hsuan Lin, Kuan-Ming Chen, Tung-Hsin Wu, Chung-Lieh Hung, Chun-Chieh Liu, Hsi-Hsien Hsu, Mohamad Amer Alaiti, Anas Fares, Anthony DeCicco, Hiram G Bezerra
BACKGROUND: Percutaneous ventricular restoration therapy using left ventricle (LV) partitioning Parachute device has emerged as a clinical treatment option for LV apical aneurysm post extensive anterior myocardial infarction (AMI). We assessed changes of diastolic mechanics and accompanied functional improvements following LV parachute device implantation by cardiac computed tomography (CCT). METHODS AND RESULTS: CCT data from 28 patients in the pre- and post-implantation of LV parachute device implantation...
April 20, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28427417/novel-trigenic-cacna1c-des-mypn-mutations-in-a-family-of-hypertrophic-cardiomyopathy-with-early-repolarization-and-short-qt-syndrome
#16
Yanhong Chen, Hector Barajas-Martinez, Dongxiao Zhu, Xihui Wang, Chonghao Chen, Ruijuan Zhuang, Jingjing Shi, Xueming Wu, Yijia Tao, Weidong Jin, Xiaoyan Wang, Dan Hu
BACKGROUND: Hypertrophic cardiomyopathy (HCM) patients with early repolarization (ER) pattern are at higher risk of ventricular arrhythmia, yet the genetic background of this situation has not been well investigated. Here we report novel trigenic mutations detected in a Chinese family of obstructive HCM with ER and short QT syndrome (SQTS). METHODS: Proband and family members underwent detailed medical assessments. DNAs were extracted from peripheral blood leukocytes for genetic screening with next generation method...
April 20, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28421842/the-management-of-ventricular-dysrhythmia-in-aconite-poisoning
#17
REVIEW
James M Coulson, Thomas M Caparrotta, John P Thompson
INTRODUCTION: Aconite poisoning is relatively rare but is frequently complicated by ventricular dysrhythmias, which may be fatal. Molecular basis of aconite alkaloid ventricular arrhythmogenicity: Aconite exerts its toxic effects due to the presence of an admixture of alkaloids present in all parts of the plant. The major target of these aconite alkaloids is the fast voltage-gates sodium channel, where they cause persistent activation. This blockade of the channel in the activated state promotes automaticity within the ventricular myocardium and the generation of ventricular arrhythmias...
June 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28420707/role-of-the-fatty-acid-binding-protein-4-in-heart-failure-and-cardiovascular-disease
#18
Ricardo Rodriguez-Calvo, Josefa Girona, Josep M Alegret, Alba Bosquet, Daiana Ibarretxe, Lluís Masana
Obesity and ectopic fat accumulation in non-adipose tissues are major contributors to heart failure (HF) and cardiovascular disease (CVD). Adipocytes act as endocrine organs by releasing a large number of bioactive molecules into the bloodstream, which participate in a communication network between white adipose tissue and other organs, including the heart. Among these molecules, fatty acid binding protein 4 (FABP4) has been recently shown to increase cardiometabolic risk. Both clinical and experimental evidence have identified FABP4 as a relevant player in atherosclerosis and coronary artery disease, and it has been directly related to cardiac alterations such as left ventricular hypertrophy (LVH) or both systolic and diastolic cardiac dysfunction...
April 18, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28410843/left-ventricular-hypertrophy-does-not-prevent-heart-failure-in-experimental-hypertension
#19
H Hernán Gómez Llambí, G Cao, M Donato, D Suárez, G Ottaviano, A Müller, B Buchholz, R Gelpi, M Otero-Losada, J Milei
BACKGROUND: Left ventricular hypertrophy (LVH) secondary to hypertension has been accepted to prevent heart failure (HF) while paradoxically increasing cardiovascular morbi-mortality. OBJECTIVES: To evaluate whether antihypertensive treatment inhibits LVH, restores beta-adrenergic response and affects myocardial oxidative metabolism. METHODS: Ninety spontaneously hypertensive rats (SHR) were distributed into groups and treated (mg/kg, p.o...
March 27, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28396856/bidomain-predictions-of-virtual-electrode-induced-make-and-break-excitations-around-blood-vessels
#20
Adam J Connolly, Edward Vigmond, Martin J Bishop
INTRODUCTION AND BACKGROUND: Virtual electrodes formed by field stimulation during defibrillation of cardiac tissue play an important role in eliciting activations. It has been suggested that the coronary vasculature is an important source of virtual electrodes, especially during low-energy defibrillation. This work aims to further the understanding of how virtual electrodes from the coronary vasculature influence defibrillation outcomes. METHODS: Using the bidomain model, we investigated how field stimulation elicited activations from virtual electrodes around idealized intramural blood vessels...
2017: Frontiers in Bioengineering and Biotechnology
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