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https://www.readbyqxmd.com/read/29047094/endothelial-cell-reactive-oxygen-species-and-ca-2-signaling-in-pulmonary-hypertension
#1
Karthik Suresh, Larissa A Shimoda
Pulmonary hypertension (PH) refers to a disorder characterized by elevated pulmonary arterial pressure, leading to right ventricular overload and eventually right ventricular failure, which results in high morbidity and mortality. PH is associated with heterogeneous etiologies and distinct molecular mechanisms, including abnormal migration and proliferation of endothelial and smooth muscle cells. Although the exact details are not fully elucidated, reactive oxygen species (ROS) have been shown to play a key role in promoting abnormal function in pulmonary arterial smooth muscle and endothelial cells in PH...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29044493/combining-echo-and-natriuretic-peptides-to-guide-heart-failure-care-in-the-outpatient-setting-a-position-paper
#2
REVIEW
Frank Lloyd Dini, Erberto Carluccio, Fabrizio Montecucco, Gian Marco Rosa, Paolo Fontanive
BACKGROUND: Chronic heart failure (HF) is a relevant and growing public health problem. Although the prognosis has recently improved, it remains a lethal disease, with a mortality that equals or exceeds that of many malignancies. Furthermore, chronic HF is costly, representing a large and growing drain on healthcare resources. METHODS: This narrative review is based on the material searched for and obtained via PubMed up to May 2017. The search terms we used were: "heart failure, echocardiography, natriuretic peptides" in combination with "treatment, biomarkers, guidelines"...
October 16, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29041921/perioperative-management-of-paraganglioma-and-catecholamine-induced-cardiomyopathy-in-child-a-case-report-and-review-of-the-literature
#3
Xixi Jia, Xiangyang Guo, Qing Zheng
BACKGROUND: Paragangliomas are catecholamine-secreting tumors of the paraganglia. Perioperative mortality of children with paraganglioma is high, but preoperative therapy and anesthetic management of paraganglioma resection are controversial in children. The literatures on catecholamine-induced cardiomyopathy are limited to several case reports,with few reports of studies on children. CASE PRESENTATION: Here we report the anesthetic management of a child with paraganglioma and catecholamine-induced cardiomyopathy, and the possible perioperative anesthesia problems of the paraganglioma resection are discussed...
October 17, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/29040462/both-cardiomyocyte-and-endothelial-cell-nox4-mediate-protection-against-hemodynamic-overload-induced-remodeling
#4
Min Zhang, Heloise Mongue-Din, Daniel Martin, Norman Catibog, Ioannis Smyrnias, Xiaohong Zhang, Bin Yu, Minshu Wang, Ralf P Brandes, Katrin Schröder, Ajay M Shah
Aims: NADPH oxidase-4 (Nox4) is an important reactive oxygen species (ROS) source that is upregulated in the hemodynamically overloaded heart. Our previous studies using global Nox4 knockout (Nox4KO) mice demonstrated a protective role of Nox4 during chronic abdominal aortic banding, involving a paracrine enhancement of myocardial capillary density. However, other authors who studied cardiac-specific Nox4KO mice reported detrimental effects of Nox4 in response to transverse aortic constriction (TAC)...
October 13, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29040414/luma-is-not-essential-for-murine-cardiac-development-and-function
#5
Matthew John Stroud, Xi Fang, Jianlin Zhang, Nuno Guimarães-Camboa, Jennifer Veevers, Nancy D Dalton, Yusu Gu, William H Bradford, Kirk L Peterson, Sylvia M Evans, Larry Gerace, Ju Chen
Aims: Luma is a recently discovered, evolutionarily conserved protein expressed in mammalian heart that is associated with the LInker of Nucleoskeleton and Cytoskeleton (LINC) complex. The LINC complex structurally integrates the nucleus and the cytoplasm, and plays a critical role in mechanotransduction across the nuclear envelope. Mutations in several LINC components in both humans and mice result in various cardiomyopathies, implying they play essential, non-redundant roles. A single amino acid substitution of serine 358 to leucine (S358L) in LUMA is the unequivocal cause of a distinct form of arrhythmogenic cardiomyopathy...
October 12, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29038991/pathophysiological-and-therapeutic-implications-in-patients-with-atrial-fibrillation-and-heart-failure
#6
REVIEW
Felix Hohendanner, F R Heinzel, F Blaschke, B M Pieske, W Haverkamp, H L Boldt, A S Parwani
Heart failure and atrial fibrillation are common and responsible for significant mortality of patients. Both share the same risk factors like hypertension, ischemic heart disease, diabetes, obesity, arteriosclerosis, and age. A variety of microscopic and macroscopic changes favor the genesis of atrial fibrillation in patients with preexisting heart failure, altered subcellular Ca(2+) homeostasis leading to increased cellular automaticity as well as concomitant fibrosis that are induced by pressure/volume overload and altered neurohumoral states...
October 16, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/29034264/reducing-cardiac-fibrosis-na-k-atpase-signaling-complex-as-a-novel-target
#7
X Fan, J Xie, J Tian
Cardiac fibrosis is a common pathological process in cardiac disease and may lead to heart failure. It can also cause sudden death even in those without cardiac symptoms. Tissue fibrosis can be categorized into two categories: replacement fibrosis (also called reparative fibrosis) and reactive fibrosis. In replacement fibrosis, infiltration of inflammatory cells and accumulation of Extracellular Matrix (ECM) proteins are the initial steps in forming scarlike fibrotic tissue after acute cardiac injury and cardiac cell necrosis...
2017: Cardiovascular Pharmacology: Open Access
https://www.readbyqxmd.com/read/29029794/rho-kinase-inhibition-reverses-impaired-ca-2-handling-and-associated-left-ventricular-dysfunction-in-pressure-overload-induced-cardiac-hypertrophy
#8
Yusuf Olgar, Murat Cenk Celen, Bilge Eren Yamasan, Nihal Ozturk, Belma Turan, Semir Ozdemir
Recent studies have implicated a relationship between RhoA/ROCK activity and defective Ca(2+) homeostasis in hypertrophic hearts. This study investigated molecular mechanism underlying ROCK inhibition-mediated cardioprotection against pressure overload-induced cardiac hypertrophy, with a focus on Ca(2+) homeostasis. Cardiac hypertrophy model was established by performing transverse aortic constriction (TAC) in 8-week-old male rats. Groups were assigned as SHAM, TAC and TAC+Fas (rats undergoing TAC and treated with fasudil)...
November 2017: Cell Calcium
https://www.readbyqxmd.com/read/29026447/epigenome-alterations-in-aortic-valve-stenosis-and-its-related-left-ventricular-hypertrophy
#9
REVIEW
Igor Gošev, Martina Zeljko, Željko Đurić, Ivana Nikolić, Milorad Gošev, Sanja Ivčević, Dino Bešić, Zoran Legčević, Frane Paić
Aortic valve stenosis is the most common cardiac valve disease, and with current trends in the population demographics, its prevalence is likely to rise, thus posing a major health and economic burden facing the worldwide societies. Over the past decade, it has become more than clear that our traditional genetic views do not sufficiently explain the well-known link between AS, proatherogenic risk factors, flow-induced mechanical forces, and disease-prone environmental influences. Recent breakthroughs in the field of epigenetics offer us a new perspective on gene regulation, which has broadened our perspective on etiology of aortic stenosis and other aortic valve diseases...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/29021323/pathologic-stimulus-determines-lineage-commitment-of-cardiac-c-kit-cells
#10
Zhongming Chen, Wuqiang Zhu, Ingrid Bender, Wuming Gong, Il-Youp Kwak, Amritha Yellamilli, Thomas J Hodges, Natsumi Nemoto, Jianyi Zhang, Daniel J Garry, Jop H van Berlo
Background -Although cardiac c-kit(+) cells are being tested in clinical trials, the circumstances that determine lineage differentiation of c-kit(+) cells in vivo are unknown. Recent findings suggest endogenous cardiac c-kit(+) cells rarely contribute cardiomyocytes to the adult heart. We assessed whether various pathological stimuli differentially affect the eventual cell fates of c-kit(+) cells. Methods -We employed single cell sequencing and genetic lineage tracing of c-kit(+) cells to determine whether various pathologic stimuli would result in different fates of c-kit(+) cells...
October 11, 2017: Circulation
https://www.readbyqxmd.com/read/28994784/technique-of-minimally-invasive-transverse-aortic-constriction-in-mice-for-induction-of-left-ventricular-hypertrophy
#11
Reza Tavakoli, Simona Nemska, Peiman Jamshidi, Max Gassmann, Nelly Frossard
Transverse aortic constriction (TAC) in mice is one of the most commonly used surgical techniques for experimental investigation of pressure overload-induced left ventricular hypertrophy (LVH) and its progression to heart failure. In the majority of the reported investigations, this procedure is performed with intubation and ventilation of the animal which renders it demanding and time-consuming and adds to the surgical burden to the animal. The aim of this protocol is to describe a simplified technique of minimally invasive TAC without intubation and ventilation of mice...
September 25, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28994700/social-hazards-as-manifested-workplace-discrimination-and-health-vietnamese-and-ukrainian-female-and-male-migrants-in-czechia
#12
Dušan Drbohlav, Dagmar Dzúrová
Social hazards as one of the dimensions of workplace discrimination are a potential social determinant of health inequalities. The aim of this study was to investigate relations between self-reported health and social hazard characteristics (defined as-discrimination as such, violence or threat of violence, time pressure or work overload and risk of accident) among Vietnamese and Ukrainian migrants (males and females) in Czechia by age, education level and marital status. This study is based on data from a survey of 669 immigrants in Czechia in 2013...
October 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28993090/possible-role-of-rivaroxaban-in-attenuating-pressure-overload-induced-atrial-fibrosis-and-fibrillation
#13
Hidekazu Kondo, Ichitaro Abe, Akira Fukui, Shotaro Saito, Miho Miyoshi, Kohei Aoki, Tetsuji Shinohara, Yasushi Teshima, Kunio Yufu, Naohiko Takahashi
BACKGROUND: Coagulation factor Xa (FXa) promotes thrombus formation and exacerbates inflammation via activation of protease-activated receptor (PAR)-2. We tested the hypothesis of whether administration of direct oral anticoagulant, rivaroxaban, would attenuate transverse aortic constriction (TAC)-induced atrial inflammatory fibrosis and vulnerability to atrial fibrillation (AF) in mice. METHODS: Ten-week-old male CL57/B6 mice were divided into a sham-operation (CNT) group and TAC-surgery group...
October 6, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28991641/cardioprotection-of-stevioside-on-stunned-rat-hearts-a-mechano-energetical-study
#14
María I Ragone, Patricia Bonazzola, Germán A Colareda, María Lara Lazarte, Fiorella Bruno, Alicia E Consolini
BACKGROUND: The sweetener and hypoglycemic properties of stevioside (STV) are well known, as the main component of the plant Stevia rebaudiana. Given its extensive use in diabetic patients, it was of interest to evaluate its effects on the most frequent cardiovascular disease, the coronary insufficiency. PURPOSE: To study whether STV could be cardioprotective against ischemia-reperfusion (I/R) in a model of "stunning" in rat hearts. STUDY DESIGN: A preclinical study was performed in isolated hearts from rats in the following groups: non-treated rats whose hearts were perfused with STV 0...
November 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28985849/treating-a-20-mm-hg-gradient-alleviates-myocardial-hypertrophy-in-experimental-aortic-coarctation
#15
David C Wendell, Ingeborg Friehs, Margaret M Samyn, Leanne M Harmann, John F LaDisa
BACKGROUND: Children with coarctation of the aorta (CoA) can have a hyperdynamic and remodeled left ventricle (LV) from increased afterload. Literature from an experimental model suggests the putative 20 mm Hg blood pressure gradient (BPG) treatment guideline frequently implemented in CoA studies may permit irreversible vascular changes. LV remodeling from pressure overload has been studied, but data are limited following correction and using a clinically representative BPG. MATERIALS AND METHODS: Rabbits underwent CoA at 10 weeks to induce a 20 mm Hg BPG using permanent or dissolvable suture thereby replicating untreated and corrected CoA, respectively...
October 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28985746/porcine-model-of-progressive-cardiac-hypertrophy-and-fibrosis-with-secondary-postcapillary-pulmonary-hypertension
#16
Mariann Gyöngyösi, Noemi Pavo, Dominika Lukovic, Katrin Zlabinger, Andreas Spannbauer, Denise Traxler, Georg Goliasch, Ljubica Mandic, Jutta Bergler-Klein, Alfred Gugerell, Andras Jakab, Zsuzsanna Szankai, Levente Toth, Rita Garamvölgyi, Gerald Maurer, Frederic Jaisser, Faiez Zannad, Thomas Thum, Sándor Bátkai, Johannes Winkler
BACKGROUND: Meaningful translational large animal models for cardiac diseases are indispensable for studying disease mechanisms, development of novel therapeutic strategies, and evaluation of potential drugs. METHODS: For induction of heart failure, cardiac hypertrophy and fibrosis, a bare metal stent was implanted in the descending aorta of growing pigs (n = 7), inducing pressure stress on the left ventricle (group HYPI). The constant stent size in growing pigs resulted in antegrade partial obstruction of the aortic flow with a gradual increase in afterload...
October 6, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28982031/direct-thrombin-inhibition-with-dabigatran-attenuates-pressure-overload-induced-cardiac-fibrosis-and-dysfunction-in-mice
#17
Anping Dong, Paul Mueller, Fanmuyi Yang, Liping Yang, Andrew Morris, Susan S Smyth
INTRODUCTION: The multifunctional serine protease thrombin exerts proinflammatory and profibrotic cellular effects that may contribute to cardiac remodeling. This study was designed to investigate whether direct thrombin inhibition with dabigatran attenuates myocardial injury in the setting of pressure overload-induced heart failure. MATERIAL AND METHODS: Transverse aortic constriction (TAC) surgery was performed on C57Bl/6J male mice to elicit cardiac hypertrophy...
September 21, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28980032/-rupture-of-the-tendon-of-the-tibialis-anterior-muscle-etiology-clinical-symptoms-and-treatment
#18
REVIEW
H Waizy, B Bouillon, C Stukenborg-Colsman, D Yao, S Ettinger, L Claassen, C Plaass, K Danniilidis, D Arbab
Ruptures of the tendon of the tibialis anterior muscle tend to occur in the context of degenerative impairments. This mainly affects the distal avascular portion of the tendon. Owing to the good compensation through the extensor hallucis longus and extensor digitorum muscles, diagnosis is often delayed. In addition to the clinical examination, magnetic resonance inaging (MRI) diagnostics are of particular importance, although damage or rupture of the tendon can also be demonstrated sonographically. Therapeutic measures include conservative or operative measures, depending on the clinical symptoms...
October 4, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28979698/stachydrine-ameliorates-pressure-overload-induced-diastolic-heart-failure-by-suppressing-myocardial-fibrosis
#19
Hui-Hua Chen, Pei Zhao, Wen-Xia Zhao, Jing Tian, Wei Guo, Ming Xu, Chen Zhang, Rong Lu
Stachydrine (Sta), a major constituent of Leonurus japonicus Houtt, has been reported to possess numerous cardioprotective effects. In this study, we evaluated the effect of Sta on pressure overload-induced diastolic heart failure in rats and investigated the mechanisms underlying the effect. Wistar rats were randomized to transverse aortic constriction (TAC) or sham operation. After 3 days, the rats that underwent TAC were randomized to treatment for a total of four experimental groups (n=10 each group): sham operation, TAC only, TAC + telmisartan (Tel), and TAC + stachydrine (Sta)...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28972174/sirtuin-5-is-required-for-mouse-survival-in-response-to-cardiac-pressure-overload
#20
Kathleen A Hershberger, Dennis M Abraham, Angelical S Martin, Lan Mao, Juan Liu, Hongbo Gu, Jason W Locasale, Matthew D Hirschey
In mitochondria, the sirtuin SIRT5 is an NAD(+)-dependent protein deacylase that controls several metabolic pathways. While a wide range of SIRT5 targets has been identified, the overall function of SIRT5 in organismal metabolic homeostasis remains unclear. Given that SIRT5 expression is highest in the heart and that sirtuins are commonly stress-response proteins, we used an established model of pressure overload-induced heart muscle hypertrophy caused by transverse aortic constriction (TAC) to determine SIRT5's role in cardiac stress responses...
October 2, 2017: Journal of Biological Chemistry
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