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Heart remodeling

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https://www.readbyqxmd.com/read/28724040/cardiac-remodeling-indicators-in-adolescent-athletes
#1
Joaquim Castanheira, João Valente-Dos-Santos, Daniela Costa, Diogo Martinho, Jorge Fernandes, João Duarte, Nuno Sousa, Vasco Vaz, Luis Rama, António Figueiredo, Manuel Coelho-E-Silva
Objective: The idea that different sports and physical training type results in different cardiac adaptations has been widely accepted. However, this remodelling process among different sport modalities is still not fully understood. Thus, the current study aims to investigate the heart morphology variation associated with a set of different modalities characterized by distinct models of preparation and different methods and demands of training and completion. Method: The sample comprises 42 basketball players, 73 roller hockey players, 28 judo athletes and 21 swimmers...
May 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28722488/berberine-promotes-ischemia-induced-angiogenesis-in-mice-heart-via-upregulation-of-microrna-29b
#2
Mo-Li Zhu, Ya-Ling Yin, Song Ping, Hai-Ya Yu, Guang-Rui Wan, Xu Jian, Peng Li
BACKGROUND: Berberine has several preventive effects on cardiovascular diseases. Increased expression of miR-29b has been reported to attenuate cardiac remodeling after myocardial infarction (MI). We hypothesized that berberine via an miR-29b-dependent mechanism promotes angiogenesis and improves heart functions in mice after MI. METHODS: The MI model was established in mice by ligation of left anterior descending coronary artery. The expression of miR-29b was examined by RT-qPCR...
July 19, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28714932/thrombospondins-a-role-in-cardiovascular-disease
#3
REVIEW
Dimitry A Chistiakov, Alexandra A Melnichenko, Veronika A Myasoedova, Andrey V Grechko, Alexander N Orekhov
Thrombospondins (TSPs) represent extracellular matrix (ECM) proteins belonging to the TSP family that comprises five members. All TSPs have a complex multidomain structure that permits the interaction with various partners including other ECM proteins, cytokines, receptors, growth factors, etc. Among TSPs, TSP1, TSP2, and TSP4 are the most studied and functionally tested. TSP1 possesses anti-angiogenic activity and is able to activate transforming growth factor (TGF)-β, a potent profibrotic and anti-inflammatory factor...
July 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28714851/pdgfr%C3%AE-functions-in-endothelial-derived-cells-to-regulate-neural-crest-cells-and-development-of-the-great-arteries
#4
Haig Aghajanian, Young Kuk Cho, Nicholas W Rizer, Qiaohong Wang, Li Li, Karl Degenhardt, Rajan Jain
Originating as a single vessel emerging from the embryonic heart, the truncus arteriosus must septate and remodel into the aorta and pulmonary artery to support postnatal life. Defective remodeling or septation leads to abnormalities collectively known as conotruncal defects, which are associated with significant mortality and morbidity. Multiple populations of cells must interact to coordinate outflow tract remodeling, and cardiac neural crest has emerged as particularly important during this process. Abnormalities in cardiac neural crest have been implicated in the pathogenesis of multiple conotruncal defects, including persistent truncus arteriosus, double outlet right ventricle, and tetralogy of Fallot...
July 14, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28711633/novel-measure-of-autonomic-remodeling-associated-with-sudden-cardiac-arrest-in-diabetes
#5
Yang Yang, Aapo L Aro, Sandeep G Nair, Reshmy Jayaraman, Kyndaron Reinier, Carmen Rusinaru, Audrey Uy-Evanado, Hirad Yarmohammadi, Jonathan Jui, Sumeet S Chugh
BACKGROUND: Diabetes is independently associated with increased risk of sudden cardiac arrest (SCA), with a need to identify novel methods for risk stratification. Diabetics can develop autonomic dysfunction which has been associated with increased risk of ventricular arrhythmogenesis, and manifests as reduced heart rate variability (HRV). However, previously published studies have not accounted for resting heart rate (HR), important from both pathophysiologic and prognosticating standpoints...
July 12, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28711447/the-transition-from-hypertension-to%C3%A2-heart%C3%A2-failure-contemporary-update
#6
REVIEW
Franz H Messerli, Stefano F Rimoldi, Sripal Bangalore
Longstanding hypertension ultimately leads to heart failure (HF), and as a consequence most patients with HF have a history of hypertension. Conversely, absence of hypertension in middle age is associated with lower risks for incident HF across the remaining life course. Cardiac remodeling to a predominant pressure overload consists of diastolic dysfunction and concentric left ventricular (LV) hypertrophy. When pressure overload is sustained, diastolic dysfunction progresses, filling of the concentric remodeled LV decreases, and HF with preserved ejection fraction ensues...
July 6, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28710503/rac1-mediated-cardiac-damage-causes-diastolic-dysfunction-in-a-mouse-model-of-subacute-doxorubicin-induced-cardiotoxicity
#7
Jan Ohlig, Christian Henninger, Simone Zander, Marc Merx, Malte Kelm, Gerhard Fritz
The anticancer efficacy of anthracyclines is limited by congestive heart failure. Clinically established markers of early onset of cardiotoxicity following anthracycline treatment and preventive measures are missing. Although statins are reported to alleviate anthracycline-induced cardiotoxicity in vivo, the molecular mechanisms involved remain elusive. In vitro data point to Rac1 as major target of the cytoprotective statin effects. Here we investigated whether specific inhibition of Rac1 by NSC23766 is as effective as lovastatin in preventing subacute cardiotoxicity following doxorubicin treatment...
July 14, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28709930/particle-image-velocimetry-study-of-the-celiac-trunk-hemodynamic-induced-by-continuous-flow-left-ventricular-assist-device
#8
Francesco Scardulla, Diego Bellavia, Leonardo D'Acquisto, Giuseppe M Raffa, Salvatore Pasta
Whereas left ventricular assist device (LVAD) is the gold-standard therapy for patients with heart failure, gastrointestinal bleeding is one of the most common complications. LVAD implantation may remarkably impact aortic hemodynamics so that experimental and computational flow analyses can be used to study the disease mechanisms. Here we present an experimentally-calibrated computational model of the celiac trunk hemodynamic of a LVAD-supported patient who experienced bleeding after device implantation. Specifically, both particle image velocimetry (PIV) and echocardiography were used to measure and compare flow distributions in each branch of a phantom model of the patient abdominal aorta...
July 12, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28709857/remodeling-of-the-transverse-tubular-system-after-myocardial-infarction-in-rabbit-correlates-with-local-fibrosis-a-potential-role-of-biomechanics
#9
REVIEW
T Seidel, A C Sankarankutty, F B Sachse
The transverse tubular system (t-system) of ventricular cardiomyocytes is essential for efficient excitation-contraction coupling. In cardiac diseases, such as heart failure, remodeling of the t-system contributes to reduced cardiac contractility. However, mechanisms of t-system remodeling are incompletely understood. Prior studies suggested an association with altered cardiac biomechanics and gene expression in disease. Since fibrosis may alter tissue biomechanics, we investigated the local microscopic association of t-system remodeling with fibrosis in a rabbit model of myocardial infarction (MI)...
July 11, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28709719/metformin-effects-on-the-heart-and-the-cardiovascular-system-a%C3%A2-review-of-experimental-and-clinical-data
#10
REVIEW
L Nesti, A Natali
BACKGROUND: Metformin, the eldest and most widely used glucose lowering drug, is likely to be effective also on cardiac and vascular disease prevention. Nonetheless, uncertainty still exists with regard to its effects on the cardiovascular system as a whole and specifically on the myocardium, both at the organ and cellular levels. METHODS: We reviewed the available data on the cardiac and vascular effects of metformin, encompassing both in vitro, either tissue or isolated organ, and in vivo studies in experimental animals and humans, as well as the evidence generated by major clinical trials...
May 10, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28707396/role-of-abnormal-repolarization-in-the-mechanism-of-cardiac-arrhythmia
#11
O E Osadchii
In cardiac patients, life-threatening tachyarrhythmia is often precipitated by abnormal changes in ventricular repolarization and refractoriness. Repolarization abnormalities typically evolve as a consequence of impaired function of outward K(+) currents in cardiac myocytes, which may be caused by genetic defects or result from various acquired pathophysiological conditions, including electrical remodelling in cardiac disease, ion channel modulation by clinically used pharmacological agents, and systemic electrolyte disorders seen in heart failure, such as hypokalaemia...
July 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28707261/from-inflammation-to-fibrosis-molecular-and-cellular-mechanisms-of-myocardial-tissue-remodelling-and-perspectives-on-differential-treatment-opportunities
#12
REVIEW
Navin Suthahar, Wouter C Meijers, Herman H W Silljé, Rudolf A de Boer
PURPOSE OF REVIEW: In this review, we highlight the most important cellular and molecular mechanisms that contribute to cardiac inflammation and fibrosis. We also discuss the interplay between inflammation and fibrosis in various precursors of heart failure (HF) and how such mechanisms can contribute to myocardial tissue remodelling and development of HF. RECENT FINDINGS: Recently, many research articles attempt to elucidate different aspects of the interplay between inflammation and fibrosis...
July 13, 2017: Current Heart Failure Reports
https://www.readbyqxmd.com/read/28707218/the-dna-damage-response-pathway-in-normal-hematopoiesis-and-malignancies
#13
REVIEW
Domenico Delia, Shuki Mizutani
In mammalian cells, the DNA damage response (DDR) prevents the replication and propagation of DNA errors to the next generation, thus maintaining genomic stability. At the heart of the DDR are the related signaling kinases ATM, ATR, and DNA-PK, which regulate DNA repair and associated events such as cell cycle checkpoints, chromatin remodeling, transcription, and ultimately apoptosis. Several findings highlight the occurrence of DDR in hemopoietic stem cells (HSCs), and persistence of DNA lesions in these cells promotes their functional decline and accumulation of leukemogenic mutations...
July 13, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28706583/cardiac-damage-in-athlete-s-heart-when-the-supernormal-heart-fails
#14
REVIEW
Andreina Carbone, Antonello D'Andrea, Lucia Riegler, Raffaella Scarafile, Enrica Pezzullo, Francesca Martone, Raffaella America, Biagio Liccardo, Maurizio Galderisi, Eduardo Bossone, Raffaele Calabrò
Intense exercise may cause heart remodeling to compensate increases in blood pressure or volume by increasing muscle mass. Cardiac changes do not involve only the left ventricle, but all heart chambers. Physiological cardiac modeling in athletes is associated with normal or enhanced cardiac function, but recent studies have documented decrements in left ventricular function during intense exercise and the release of cardiac markers of necrosis in athlete's blood of uncertain significance. Furthermore, cardiac remodeling may predispose athletes to heart disease and result in electrical remodeling, responsible for arrhythmias...
June 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28705316/cell-specific-pathways-supporting-persistent-fibrosis-in-heart-failure
#15
Stephen D Farris, Creighton Don, Deri Helterline, Christopher Costa, Tabitha Plummer, Susanne Steffes, Claudius Mahr, Nahush A Mokadam, April Stempien-Otero
BACKGROUND: Only limited data exist describing the histologic and noncardiomyocyte function of human myocardium in end-stage heart failure (HF). OBJECTIVES: The authors sought to determine changes in noncardiomyocyte cellular activity in patients with end-stage HF after left ventricular assist device (LVAD)-induced remodeling to identify mechanisms impeding recovery. METHODS: Myocardium was obtained from subjects undergoing LVAD placement and/or heart transplantation...
July 18, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28702857/protein-kinase-c-and-cardiac-dysfunction-a-review
#16
REVIEW
Raphael M Singh, Emanuel Cummings, Constantinos Pantos, Jaipaul Singh
Heart failure (HF) is a physiological state in which cardiac output is insufficient to meet the needs of the body. It is a clinical syndrome characterized by impaired ability of the left ventricle to either fill or eject blood efficiently. HF is a disease of multiple aetiologies leading to progressive cardiac dysfunction and it is the leading cause of deaths in both developed and developing countries. HF is responsible for about 73,000 deaths in the UK each year. In the USA, HF affects 5.8 million people and 550,000 new cases are diagnosed annually...
July 12, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28701763/free-of-acrylamide-sds-based-tissue-clearing-fastclear-for-three-dimensional-visualization-of-myocardial-tissue
#17
Filippo Perbellini, Alan K L Liu, Samuel A Watson, Ifigeneia Bardi, Stephen M Rothery, Cesare M Terracciano
Several pathologic conditions of the heart lead to cardiac structural remodelling. Given the high density and the opaque nature of the myocardium, deep three dimensional (3D) imaging is difficult to achieve and structural analysis of pathological myocardial structure is often limited to two dimensional images and of thin myocardial sections. Efficient methods to obtain optical clearing of the tissue for 3D visualisation are therefore needed. Here we describe a rapid, simple and versatile Free-of-Acrylamide SDS-based Tissue Clearing (FASTClear) protocol specifically designed for cardiac tissue...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28701679/nanoparticle-mediated-delivery-of-pitavastatin-to-monocytes-macrophages-inhibits-left-ventricular-remodeling-after-acute-myocardial-infarction-by-inhibiting-monocyte-mediated-inflammation
#18
Yajing Mao, Jun-Ichiro Koga, Masaki Tokutome, Tetsuya Matoba, Gentaro Ikeda, Kaku Nakano, Kensuke Egashira
Left ventricular (LV) remodeling after myocardial infarction (MI) causes heart failure. Although medical therapies including angiotensin converting enzyme inhibitors show inhibitory effects on post-infarct LV remodeling, the prognosis of patients with post-infarct heart failure is still poor. Accumulating evidence suggests that an inflammatory response is implicated in the process of post-infarct LV remodeling. Therefore, we hypothesized that anti-inflammatory therapy by nanoparticle-mediated monocyte/macrophage-targeting delivery of pitavastatin may protect the heart from post-infarct LV remodeling...
July 13, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28701671/is-serum-uric-acid-independently-associated-with-left-ventricular-mass-index-ejection-fraction-and-b-type-natriuretic-peptide-among-female-and-male-cardiac-patients
#19
Yohei Yamauchi, Shu-Ichi Fujita, Kensaku Shibata, Hideaki Morita, Takahide Ito, Koichi Sohmiya, Masaaki Hoshiga, Nobukazu Ishizaka
Mean serum uric acid (SUA) levels are higher in men than women. In addition, recent studies have suggested that the SUA threshold at which the cardiovascular risk might increase may vary between women and men. In the current retrospective study, by analyzing the data from 219 female and 519 male patients who were free from uric acid-lowering medication, we investigated whether SUA is associated with left ventricular mass index (LVMI), left ventricular ejection fraction (LVEF), and plasma levels of B-type natriuretic peptide (BNP) independent of confounding factors, such as serum calcium, inorganic phosphate, and fibroblast growth factor 23 (FGF23), in a gender-specific manner...
July 13, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28700893/coronary-microvascular-disease-as-an-early-culprit-in-the-pathophysiology-of-diabetes-and-metabolic-syndrome
#20
REVIEW
Hicham Labazi, Aaron J Trask
Metabolic syndrome (MetS) is a group of cardio-metabolic risk factors that includes obesity, insulin resistance, hypertension, and dyslipidemia; these are also a combination of independent coronary artery disease (CAD) risk factors. Alarmingly, the prevalence of MetS risk factors are increasing and a leading cause for mortality. In the vasculature, complications from MetS and type 2 diabetes (T2D) can be divided into microvascular (retinopathy and nephropathy) and macrovascular (cardiovascular diseases and erectile dysfunction)...
July 9, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
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