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atrial natriuretic peptide

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https://www.readbyqxmd.com/read/28914755/thioredoxin-2-offers-protection-against-mitochondrial-oxidative-stress-in-h9c2-cells-and-against-myocardial-hypertrophy-induced-by-hyperglycemia
#1
Hong Li, Changqing Xu, Quanfeng Li, Xiuxiang Gao, Erkio Sugano, Hiroshi Tomita, Liming Yang, Sa Shi
Mitochondrial oxidative stress is thought to be a key contributor towards the development of diabetic cardiomyopathy. Thioredoxin 2 (Trx2) is a mitochondrial antioxidant that, along with Trx reductase 2 (TrxR2) and peroxiredoxin 3 (Prx3), scavenges H₂O₂ and offers protection against oxidative stress. Our previous study showed that TrxR inhibitors resulted in Trx2 oxidation and increased ROS emission from mitochondria. In the present study, we observed that TrxR inhibition also impaired the contractile function of isolated heart...
September 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28911024/ambulatory-pulse-pressure-predicts-the-development-of-left-ventricular-diastolic-dysfunction-in-over-20-years-of-follow-up
#2
Tero J W Pääkkö, Reko J Renko, Juha S Perkiömäki, Y Antero Kesäniemi, Antti S Ylitalo, Jarmo A Lumme, Heikki V Huikuri, Heikki Ruskoaho, Olli Vuolteenaho, Olavi H Ukkola
BACKGROUND: Ambulatory blood pressure (ABP) has been shown to have an association with left ventricular diastolic dysfunction (LVDD) in cross-sectional assessments. We evaluated the association between ABP measurement (ABPM) and the development of LVDD during over 20 years of follow up in 414 middle-aged subjects from OPERA cohort. METHODS: ABPM, clinical, and anthropometric measurements were performed in baseline. Echocardiographic measurements were performed at baseline and during follow-up and E/E' ≥15 was considered indicating significant LVDD...
October 1, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28905517/the-prognostic-significance-of-tricuspid-valve-regurgitation-in-pulmonary-arterial-hypertension
#3
Libo Chen, Carolyn M Larsen, Rachel J Le, Heidi M Connolly, Sorin V Pislaru, Joseph G Murphy, Michael D McGoon, Robert P Frantz, Garvan C Kane
INTRODUCTION: Tricuspid valve regurgitation (TR) is a frequent finding in patients with pulmonary arterial hypertension (PAH). However, its prognostic significance and relation to PAH, while suspected, are poorly understood. We assessed 727 consecutive patients with newly diagnosed PAH who underwent transthoracic echocardiographic evaluation of tricuspid valve function. OBJECTIVES: The study objective was to determine the association of TR presence and severity with patient characteristics, pulmonary artery hemodynamics, and outcome...
September 14, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28901418/profilin%C3%A2-1-contributes-to-cardiac-injury-induced-by-advanced-glycation-end%C3%A2-products-in-rats
#4
Dafeng Yang, Weiwei Liu, Liping Ma, Ya Wang, Jing Ma, Minna Jiang, Xu Deng, Fang Huang, Tianlun Yang, Meifang Chen
Cardiac injury, including hypertrophy and fibrosis, induced by advanced glycation end products (AGEs) has an important function in the onset and development of diabetic cardiomyopathy. Profilin‑1, a ubiquitously expressed and multifunctional actin‑binding protein, has been reported to be an important mediator in cardiac hypertrophy and fibrosis. However, whether profilin‑1 is involved in AGE‑induced cardiac hypertrophy and fibrosis remains to be determined. Therefore, the present study aimed to investigate the function of profilin‑1 in cardiac injury induced by AGEs...
September 8, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28900772/clathrin-dependent-internalization-signaling-and-metabolic-processing-of-guanylyl-cyclase-natriuretic-peptide-receptor-a
#5
Naveen K Somanna, Indra Mani, Satyabha Tripathi, Kailash N Pandey
Cardiac hormones, atrial and brain natriuretic peptides (ANP and BNP), have pivotal roles in renal hemodynamics, neuroendocrine signaling, blood pressure regulation, and cardiovascular homeostasis. Binding of ANP and BNP to the guanylyl cyclase/natriuretic peptide receptor-A (GC-A/NPRA) induces rapid internalization and trafficking of the receptor via endolysosomal compartments, with concurrent generation of cGMP. However, the mechanisms of the endocytotic processes of NPRA are not well understood. The present study, using (125)I-ANP binding assay and confocal microscopy, examined the function of dynamin in the internalization of NPRA in stably transfected human embryonic kidney-293 (HEK-293) cells...
September 12, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28890872/cardiac-troponin-and-outcome-in-decompensated-heart-failure-with-preserved-ejection-fraction
#6
Mohammad Thawabi, Amer Hawatmeh, Sarah Studyvin, Habib Habib, Fayez Shamoon, Marc Cohen
BACKGROUND: Cardiac troponin (cTn) has been established as an effective prognostic marker in acute heart failure (HF) with predominantly reduced ejection fraction. However, it's prognostic value in heart failure with preserved ejection fraction (HFpEF) is unclear. The aim of this study is to describe the prognostic role of troponin I in patients hospitalized for HFpEF decompensation. METHODS: We included 363 consecutive patients admitted for HFpEF decompensation that was not associated with acute coronary syndrome (ACS)...
August 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28877880/altered-vasopressin-and-natriuretic-peptide-levels-in-a-rat-model-of-spinal-cord-injury-implications-for-the-development-of-polyuria
#7
Lynnette R Montgomery, Charles H Hubscher
Urinary dysfunction is a common complaint following spinal cord injury (SCI), and is a leading issue for individuals with SCI that impacts their quality of life. One urinary complication that has received little attention is SCI-induced polyuria, even though SCI individuals will significantly restrict their fluid intake to decrease urine production leading to a sequelae of medical complications. Understanding the mechanisms instigating the development of polyuria will allow us to target interventions which may alleviate polyuria symptoms leading to significant improvements in the quality of life and urinary health of SCI individuals...
September 6, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28875838/biomarkers-in-atrial-fibrillation-and-heart-failure
#8
Evangelos Oikonomou, Theodoros Zografos, Georgios-Angelos Papamikroulis, Gerasimos Siasos, Georgia Vogiatzi, Panagiotis Theofilis, Alexandros Briasoulis, Spyridon Papaioannou, Manolis Vavuranakis, Vasiliki Gennimata, Dimitris Tousoulis
Atrial fibrillation (AF) is the most common sustained arrhythmia encountered in clinical practice and an important contributor to cardiovascular morbidity and mortality. Although the exact mechanisms behind AF are not completely elucidated, the underlying pathophysiological changes have been well described. Predisposal factors for AF include the older age, the increased left atrial size, the decreased left atrial function, the presence of heart failure and left ventricular systolic dysfunction and the presence of coronary heart disease or pulmonary or mitral valve disease...
August 29, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28867336/plasmatic-levels-of-n-terminal-pro-atrial-natriuretic-peptide-in-preeclamptic-patients-and-healthy-normotensive-pregnant-women
#9
Eduardo Reyna-Villasmil, Jorly Mejia-Montilla, Nadia Reyna-Villasmil, Gabriel Mayner-Tresol, Pedro Herrera-Moya, Andreina Fernández-Ramírez, Marta Rondón-Tapía
BACKGROUND AND OBJECTIVE: To compare plasma N-terminal pro-atrial natriuretic peptide concentrations in preeclamptic patients and healthy normotensive pregnant women. METHODS: A cases-controls study was done with 180 patients at Hospital Central Dr. Urquinaona, Maracaibo, Venezuela, that included 90 preeclamptic patients (group A; cases) and 90 healthy normotensive pregnant women selected with the same age and body mass index similar to group A (group B; controls)...
August 31, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28865890/natriuretic-propeptides-as-markers-of-atrial-fibrillation-burden-and-recurrence-from-the-amio-cat-trial
#10
Stine Darkner, Jens Peter Goetze, Xu Chen, Kristoffer Henningsen, Steen Pehrson, Jesper Hastrup Svendsen
Natriuretic peptides are established plasma markers of systolic heart failure, but their usefulness for the evaluation of atrial fibrillation (AF) is unknown. We examined mid-regional pro-atrial natriuretic peptide (MR-proANP) and N-terminal pro-brain natriuretic peptide (NT-proBNP) in patients undergoing ablation for AF. A subpopulation of 102 patients (median age 60 [52;65], 82% male) from the AMIO-CAT trial (Recurrence of arrhythmia following short-term oral AMIOdarone after CATheter ablation for atrial fibrillation: a double-blind, randomized, placebo-controlled study) undergoing ablation for paroxysmal (n = 55) or persistent (n = 47) AF was studied...
July 24, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28864549/atrial-natriuretic-peptide-anp-affects-stimulus-secretion-coupling-of-pancreatic-%C3%AE-cells
#11
Sabrina Undank, Julia Kaiser, Jelena Sikimic, Martina Düfer, Peter Krippeit-Drews, Gisela Drews
ANP influences glucose homeostasis and possibly acts as a link between the cardiovascular system and metabolism, especially in metabolic disorders like diabetes. The present study aimed to evaluate effects of ANP on β-cell function by the use of a β-cell specific knockout of the ANP receptor with guanylate cyclase activity (βGC-A-KO). ANP augmented insulin secretion at the threshold glucose concentration of 6 mM and decreased KATP single channel activity in β-cells of control mice but not of βGC-A-KO mice...
September 1, 2017: Diabetes
https://www.readbyqxmd.com/read/28862384/atrial-septostomy-with-a-predefined-diameter-using-a-novel-occlutech-atrial-flow-regulator-improves-symptoms-and-cardiac-index-in-patients-with-severe-pulmonary-arterial-hypertension
#12
Ramasamy Rajeshkumar, Sreeja Pavithran, Kothandam Sivakumar, Joseph J Vettukattil
OBJECTIVES: A novel Occlutech atrial flow regulator (AFR) implantation gives an atrial septal predefined predictable fenestration. BACKGROUND: Atrial septostomy relieves syncope in pulmonary arterial hypertension (PAH) by improving left heart filling, cardiac output and systemic oxygen transport despite hypoxia. Symptoms recur when small fenestrations close spontaneously. METHODS: AFR was implanted after informed consent in patients with severe PAH presenting with syncope and right heart failure...
September 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28861913/identification-and-functional-analysis-of-corin-variants-in-hypertensive-patients
#13
Yue Zhang, Tiantian Zhou, Yayan Niu, Meiling He, Can Wang, Meng Liu, Junhua Yang, Yonghong Zhang, Jianping Zhou, Koichi Fukuda, Jun Qin, Ningzheng Dong, Qingyu Wu
Corin is a serine protease that activates atrial natriuretic peptide (ANP). CORIN gene variants have been reported in patients with hypertension. To date, however, the prevalence of CORIN variants in hypertensive patients remains unknown. To understand the prevalence and functional significance of CORIN variants in hypertension, we sequenced CORIN exons in 300 normal and 401 hypertensive individuals in a Chinese population and identified nine non-synonymous variants, of which eight were not characterized previously...
August 31, 2017: Human Mutation
https://www.readbyqxmd.com/read/28860791/soluble-st2-correlates-with-some-indicators-of-right-ventricular-function-in-hypertensive-heart-failure
#14
Dike B Ojji, Sandrine Lecour, Olusoji M Adeyemi, Karen Sliwa
PURPOSE: ST2 receptor, which is a member of the Toll-like/interleukin-1 (IL-1) receptor family, has been found to be increased in the serum of patients 1 day after myocardial infarction. Several other studies have shown that soluble ST2 levels correlate with severity of heart failure (HF), left ventricular ejection fraction, creatinine clearance, B-type natriuretic peptide and C-reactive protein, and are predictors of mortality in HF. Most of these studies were not only limited to ischemic heart disease but also concentrated on left-sided HF...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/28859501/is-there-a-hormonal-regulation-of-phagocytosis-at-unicellular-and-multicellular-levels-a-critical-review
#15
György Csaba
Phagocytosis is an ancient cell function, which is similar at unicellular and multicellular levels. Unicells synthesize, store, and secrete multicellular (mammalian) hormones, which influence their phagocytosis. Amino acid hormones, such as histamine, serotonin, epinephrine, and melatonin stimulate phagocytosis, whereas peptide hormones, such as adrenocorticotropic hormone (ACTH), insulin, opioids, arginine vasopressin, and atrial natriuretic peptide decreased it, independently on their chemical structure or function in multicellulars...
September 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28846808/dna-methylation-dysregulations-in-valvular-atrial-fibrillation
#16
Kangjun Shen, Tao Tu, Zhaoshun Yuan, Jiangfeng Yi, Yangzhao Zhou, Xiaobo Liao, Qiming Liu, Xinmin Zhou
BACKGROUND: The epigenetic changes underlying the development of atrial fibrillation (AF) remain incompletely understood. Limited evidence suggests that abnormal DNA methylation might be involved in the pathogenesis of AF. In the present study, we evaluated the methylation status of genomic DNA from myocardial tissue in AF patients and sinus rhythm (SR) patients systematically. HYPOTHESIS: DNA methylation dysregulations will be associated with valvular AF. METHODS: Right atrial myocardial tissue was obtained from rheumatic valvular patients who had undergone valve replacement surgery (SR group, n = 10; AF group, n = 10)...
August 28, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28834870/diagnostic-value-of-brain-natriuretic-peptide-and-%C3%AE-endorphin-plasma-concentration-changes-in-patients-with-acute-left-heart-failure-and-atrial-fibrillation
#17
Shao-Dan Feng, Yong Jiang, Zhi-Hong Lin, Pei-Hong Lin, Si-Ming Lin, Qi-Cai Liu
RATIONALE: This study aims to evaluate the diagnostic value of beta-endorphin (β-EP) and brain natriuretic peptid (BNP) plasma concentrations for the early diagnosis of acute left heart failure and atrial fibrillation. PATIENT CONCERNS: A total of 45 patients were included. These patients comprised 23 male and 22 female patients,and 20 healthy subjects who underwent physical examinations in the Outpatient Department during the same periodwere included and assigned to the control group...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28833458/a-novel-echocardiographic-hemodynamic-classification-of-heart-failure-based-on-stroke-volume-index-and-left-atrial-pressure
#18
Amr E Abbas, Rami Khoury Abdulla, Anshul Aggrawal, Jason Crile, Steven J Lester, Judy Boura
BACKGROUND AND AIM: Dividing patients with heart failure (HF) based solely on ejection fraction (EF) may over simplify the hemodynamic states of these patients. We describe a novel echo-derived hemodynamic HF model based on flow (stroke volume index [SVI]) and left atrial pressure (E:E') correlates. METHODS: A retrospective analysis of patients admitted with HF with both reduced (HFrEF) and preserved EF (HFpEF). Patients were subdivided into four hemodynamic groups based on echocardiographic SVI (< or ≥35 mL/m(2) ) and E/E' (≥ or <15)...
August 19, 2017: Echocardiography
https://www.readbyqxmd.com/read/28831085/percutaneous-closure-of-left-atrial-appendage-affects-mid-term-release-of-mr-proanp
#19
Michael Behnes, Benjamin Sartorius, Annika Wenke, Siegfried Lang, Ursula Hoffmann, Christian Fastner, Martin Borggrefe, Thomas Roth, Jakob Triebel, Thomas Bertsch, Ibrahim Akin
The left atrial appendage (LAA) represents both a predisposing source of thrombus formation and of neuro-humoral haemostasis. This study aims to evaluate changes of biomarker expression before and after successful percutaneous closure of the LAA. Patients with atrial fibrillation and contraindication for oral anticoagulant therapy were enrolled. Blood samples were taken within 24 hours before (T1) and at least 6 months (mid-term) (T2) after successful implantation of LAA occlusion devices. Blood levels of high sensitivity troponin I and T (hsTnI, hsTnT), aminoterminal pro-brain natriuretic peptide (NT-proBNP) and mid-regional pro-atrial natriuretic peptide (MR-proANP) were evaluated at both time points...
August 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28822817/rosiglitazone-promotes-cardiac-hypertrophy-and-alters-chromatin-remodeling-in-isolated-cardiomyocytes
#20
Lama Fawaz Pharaon, Naglaa Fathi El-Orabi, Muhammad Kunhi, Nadya Al Yacoub, Salma Mahmoud Awad, Coralie Poizat
Rosiglitazone is an anti-diabetic agent that raised a major controversy over its cardiovascular adverse effects. There is in vivo evidence that Rosiglitazone promotes cardiac hypertrophy by PPAR-γ-independent mechanisms. However, whether Rosiglitazone directly alters hypertrophic growth in cardiac cells is unknown. Chromatin remodeling by histone post-translational modifications has emerged as critical for many cardiomyopathies. Based on these observations, this study was initiated to investigate the cardiac hypertrophic effect of Rosiglitazone in a cellular model of primary neonatal rat cardiomyocytes (NRCM)...
August 16, 2017: Toxicology Letters
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