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Diabetes diastolic dysfunction

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https://www.readbyqxmd.com/read/28923309/altered-penile-caveolin-expression-in-diabetes-potential-role-in-erectile-dysfunction
#1
Jay Parikh, Alice Zemljic-Harpf, Johnny Fu, Dimosthenis Giamouridis, Tung-Chin Hsieh, Adam Kassan, Karnam S Murthy, Valmik Bhargava, Hemal H Patel, M Raj Rajasekaran
BACKGROUND: The pathophysiology of increased severity of erectile dysfunction in men with diabetes and their poor response to oral pharmacotherapy are unclear. Defective vascular endothelium and consequent impairment in the formation and action of nitric oxide (NO) are implicated as potential mechanisms. Endothelial NO synthase, critical for NO generation, is localized to caveolae, plasma membrane lipid rafts enriched in structural proteins, and caveolins. Type 2 diabetes mellitus (T2DM)-induced changes in caveolin expression are recognized to play a role in cardiovascular dysfunction...
September 8, 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28914601/left-ventricular-long-axis-function-assessed-with-cardiac-cine-mr-imaging-is-an-independent-predictor-of-all-cause-mortality-in-patients-with-reduced-ejection-fraction-a-multicenter-study
#2
Simone Romano, Robert M Judd, Raymond J Kim, Han W Kim, Igor Klem, John F Heitner, Dipan J Shah, Jennifer Jue, Afshin Farzaneh-Far
Purpose To evaluate the prognostic value of a simple index of left ventricular (LV) long-axis function-lateral mitral annular plane systolic excursion (MAPSE)-in a large multicenter population of patients with reduced ejection fraction (EF) who were undergoing cardiac magnetic resonance (MR) imaging. Materials and Methods This retrospective study included 1040 consecutive patients (mean age, 59.5 years ± 15.8) at four U.S. medical centers who were undergoing cardiac MR imaging for assessment of LV dysfunction with EF less than 50%...
September 14, 2017: Radiology
https://www.readbyqxmd.com/read/28911024/ambulatory-pulse-pressure-predicts-the-development-of-left-ventricular-diastolic-dysfunction-in-over-20-years-of-follow-up
#3
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/28891228/investigating-a-biomarker-driven-approach-to-target-collagen-turnover-in-diabetic-heart-failure-with-preserved-ejection-fraction-patients-effect-of-torasemide-vs-furosemide-on-serum-c-terminal-propeptide-of-procollagen-type-i-drop-pip-trial
#4
Tobias Daniel Trippel, Sophie Van Linthout, Dirk Westermann, Ruhdja Lindhorst, Anja Sandek, Stefanie Ernst, Anna Bobenko, Mario Kasner, Frank Spillmann, Arantxa González, Begoña López, Susana Ravassa, Burkert Pieske, Walter J Paulus, Javier Díez, Frank Edelmann, Carsten Tschöpe
AIM: Heart failure with preserved ejection fraction (HFpEF) is associated with myocardial remodelling including severe pro-fibrotic changes contributing to an increase in left ventricular stiffness and diastolic dysfunction. Serum C-terminal propeptide of procollagen type I (PIP) strongly correlates with the turnover of extracellular cardiac matrix proteins and fibrosis. Torasemide, but not furosemide, was described to reduce collagen type I synthesis in clinically unstable patients with heart failure with reduced ejection fraction...
September 11, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28890308/left-ventricular-mass-geometry-and-function-in-diabetic-patients-affected-by-coronary-artery-disease
#5
Maria Maiello, Annapaola Zito, Santa Carbonara, Marco Matteo Ciccone, Pasquale Palmiero
INTRODUCTION: Coronary artery disease (CAD) is quite common among diabetic patients, our study goal is to detect the prevalence of left ventricular (LV) adverse changes in geometry, mass and diastolic function on diabetic, but not hypertensive patients, with coronary artery disease(CAD) and LV ejection fraction(LVEF)>45%, actually unknown, because of current guidelines that do not include echocardiographic assessment for follow up of diabetic patients. PATIENTS AND METHODS: 665 consecutive diabetic patients (443 females, mean age 66±9years), performed a complete echocardiographic assessment according to current ASE echo-guidelines: diastolic dysfunction (DD), eccentric hypertrophy (EH), concentric hypertrophy (CH) and concentric remodeling (CR) of LV were reported...
October 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28874244/the-interplay-between-fasting-glucose-echocardiography-and-biomarkers-pathophysiological-considerations-and-prognostic-implications
#6
Manan Pareek
BACKGROUND: Traditional cardiovascular risk stratification tools that employ clinical risk factors are limited by their modest discriminative abilities. As such, robust cardiovascular risk assessment, including our understanding of the complex interplay between risk factors, in the primary preventive setting, remains incomplete. Phenotypical heterogeneity may be even greater among subjects with hyperglycemic conditions, i.e., prediabetes and diabetes, which is worrisome, given the dramatic global rise in mean fasting glucose levels, and the strong association with adverse cardiovascular outcomes...
September 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28872225/left-ventricular-ejection-time-is-an-independent-predictor-of-incident-heart-failure-in-a-community-based-cohort
#7
Tor Biering-Sørensen, Gabriela Querejeta Roca, Sheila M Hegde, Amil M Shah, Brian Claggett, Thomas H Mosley, Kenneth R Butler, Scott D Solomon
AIMS: Systolic time intervals change in the progress of cardiac dysfunction. The usefulness of left ventricular ejection time (LVET) to predict cardiovascular morbidity, however, is unknown. METHODS AND RESULTS: We studied middle-aged African-Americans from one of four cohorts of the Atherosclerosis Risk in Communities study (Jackson cohort, n=1980) who underwent echocardiography between 1993 and 1995. Left ventricular ejection time was measured by pulsed-wave Doppler of the left ventricular outflow tract and related to outcomes...
September 4, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28859968/dipeptidyl-peptidase-4-independent-cardiac-dysfunction-links-saxagliptin-to-heart-failure
#8
Chintan N Koyani, Ewald Kolesnik, Gerald Wölkart, Niroj Shrestha, Susanne Scheruebel, Christopher Trummer, Klaus Zorn-Pauly, Astrid Hammer, Petra Lang, Helga Reicher, Heinrich Maechler, Klaus Groschner, Bernd Mayer, Peter P Rainer, Harald Sourij, Wolfgang Sattler, Ernst Malle, Brigitte Pelzmann, Dirk von Lewinski
Saxagliptin treatment has been associated with increased rate of hospitalization for heart failure in type 2 diabetic patients, though the underlying mechanism(s) remain elusive. To address this, we assessed the effects of saxagliptin on human atrial trabeculae, guinea pig hearts and cardiomyocytes. We found that the primary target of saxagliptin, dipeptidyl peptidase-4, is absent in cardiomyocytes, yet saxagliptin internalized into cardiomyocytes and impaired cardiac contractility via inhibition of the Ca(2+)/calmodulin-dependent protein kinase II-phospholamban-sarcoplasmic reticulum Ca(2+)-ATPase 2a axis and Na(+)-Ca(2+) exchanger function in Ca(2+) extrusion...
August 30, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28826911/rutin-alleviates-diabetic-cardiomyopathyand-improves-cardiac-function-in-diabetic-apoeknock-outmice
#9
Ruo Huang, Zhendong Shi, Li Chen, Yanqun Zhang, Jing Li, Yi An
Rutin, a natural bioflavonoid, hasdemonstrated anti-diabetic and anti-oxidative bioactivity.Oxidative stressis a potential therapeutic target for diabetic cardiomyopathy.We investigated whether rutinadministration (60mg/kg body weight)reducesdiabetic cardiomyopathy in a diabetic ApoE knock out mouse model.Diabetes was induced in ApoEknockout mice (male, C57BL/6 background) with a high fat diet combined with injection of streptozotocin.Cardiac function was evaluated by echocardiography and cardiac catheter hemodynamic analysis...
August 18, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28807551/the-optimal-cut-off-of-blood-pressure-related-to-left-ventricular-diastolic-dysfunction-and-remodeling-in-asian-diabetic-patients
#10
Ju Young Jung, Sung Keun Park, Jae-Hong Ryoo, Chang-Mo Oh, Jeong Gyu Kang, Kanghee Moon, Keum Ok Lee, Joong-Myung Choi
BACKGROUND: Although a recent randomized trial found no difference between intensive and standard blood pressure (BP) control in patients with diabetes mellitus (DM), the debate over the optimal BP target continues. Thus, the present study investigated the effect of BP on the subclinical left ventricular (LV) function and structural changes in diabetic patients. METHOD: A total of 2649 patients with DM who received echocardiography were enrolled in this study. Study population was stratified by three groups according to BP and presence of hypertension (normal, <130/80mmHg; prehypertension, ≥130/80mmHg without hypertension; hypertension, ≥140/90mmHg or history of hypertension)...
August 11, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28805979/effects-of-mtor-inhibition-on-cardiac-and-adipose-tissue-pathology-and-glucose-metabolism-in-rats-with-metabolic-syndrome
#11
Ayako Uchinaka, Mamoru Yoneda, Yuichiro Yamada, Toyoaki Murohara, Kohzo Nagata
The mammalian target of rapamycin (mTOR) is a regulator of metabolism and is implicated in pathological conditions such as obesity and diabetes. We aimed to investigate the role of mTOR in obesity. A new animal model of metabolic syndrome (MetS), named DahlS.Z-Lepr(fa) /Lepr(fa) (DS/obese) rats was established previously in our laboratory. In this study, we used this model to evaluate the effects of mTOR inhibition on cardiac and adipose tissue pathology and glucose metabolism. DS/obese rats were treated with the mTOR inhibitor, everolimus, (0...
August 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28801532/activation-of-nkx2-5-calr-p53-signaling-pathway-by-hyperglycemia-induces-cardiac-remodeling-and-dysfunction-in-adult-zebrafish
#12
Sun Yanyi, Wang Qiuyun, Fang Yuehua, Wu Chunfang, Lu Guoping, Chen Zhenyue
Hyperglycemia is an independent risk factor for diabetic cardiomyopathy in humans; however, the underlying mechanisms have not been thoroughly elucidated. Zebrafish (Danio rerio) was used in this study as a novel vertebrate model to explore the signaling pathways of human adult cardiomyopathy. Hyperglycemia was induced by alternately immersing adult zebrafish in a glucose solution or water. The hyperglycemic fish gradually exhibited some hallmarks of cardiomyopathy such as myocardial hypertrophy and apoptosis, myofibril loss, fetal gene reactivation, and severe arrhythmia...
August 11, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28791311/assessment-of-diabetic-cardiomyopathy-by-cardiovascular-magnetic-resonance-t1-mapping-correlation-with-left-ventricular-diastolic-dysfunction-and-diabetic-duration
#13
Yongning Shang, Xiaochun Zhang, Weilling Leng, Liu Chen, Xiaotian Lei, Tianjing Zhang, Andreas Greiser, Ziwen Liang, Jian Wang
PURPOSE: To quantify extracellular matrix expansion with the cardiovascular magnetic resonance (CMR) T1 mapping technique and the derived extracellular volume fraction (ECV) in diabetic cardiomyopathy (DbCM) patients and to detect the relationship among ECV, duration of diabetes, and diastolic function. MATERIALS: Thirty-eight patients with diabetic cardiomyopathy (20 males, age 54.6 ± 8.6 years) and thirty-two matched normal controls (15 males, age 51.4 ± 13...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28789938/azilsartan-ameliorates-diabetic-cardiomyopathy-in-young-db-db-mice-through-the-modulation-of-ace-2-ang-1-7-mas-receptor-cascade
#14
Vijayakumar Sukumaran, Hirotsugu Tsuchimochi, Eisuke Tatsumi, Mikiyasu Shirai, James T Pearson
Hyperglycemia up-regulates intracellular angiotensin II (ANG-II) production in cardiac myocytes. This study investigated the hemodynamic and metabolic effects of azilsartan (AZL) treatment in a mouse model of diabetic cardiomyopathy and whether the cardioprotective effects of AZL are mediated by the angiotensin converting enzyme (ACE)-2/ANG 1-7/Mas receptor (R) cascade. Control db/+ and db/db mice (n=5 per group) were treated with vehicle or AZL (1 or 3mg/kg/d oral gavage) from the age of 8 to 16weeks. Echocardiography was then performed and myocardial protein levels of ACE-2, Mas R, AT1R, AT2R, osteopontin, connective tissue growth factor (CTGF), atrial natriuretic peptide (ANP) and nitrotyrosine were measured by Western blotting...
August 5, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28781721/the-effects-of-diabetes-induction-on-the-rat-heart-differences-in-oxidative-stress-inflammatory-cells-and-fibrosis-between-subendocardial-and-interstitial-myocardial-areas
#15
Maria C Guido, Alyne F Marques, Elaine R Tavares, Marcelo D Tavares de Melo, Vera M C Salemi, Raul C Maranhão
Diabetic cardiomyopathy (DCM) is characterized by cardiac remodeling and impaired diastolic function that may lead to heart failure. The aim of this study was to evaluate oxidative stress, inflammatory cells, and fibrosis in both subendocardial (SEN) and interstitial (INT) areas of the myocardium. Male Wistar rats were allocated to 2 groups of 9 animals, a control (CT) group and streptozotocin-induced diabetes (DM). After 8 weeks, echocardiography morphometry, protein expression, and confocal microscopy in SEN and INT areas of the left ventricle (LV) were performed...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28776083/diabetic-cardiomyopathy-a-hyperglycaemia-and-insulin-resistance-induced-heart-disease
#16
REVIEW
Guanghong Jia, Adam Whaley-Connell, James R Sowers
Diabetic cardiomyopathy is characterised in its early stages by diastolic relaxation abnormalities and later by clinical heart failure in the absence of dyslipidaemia, hypertension and coronary artery disease. Insulin resistance, hyperinsulinaemia and hyperglycaemia are each independent risk factors for the development of diabetic cardiomyopathy. The pathophysiological factors in diabetes that drive the development of cardiomyopathy include systemic metabolic disorders, inappropriate activation of the renin-angiotensin-aldosterone system, subcellular component abnormalities, oxidative stress, inflammation and dysfunctional immune modulation...
August 3, 2017: Diabetologia
https://www.readbyqxmd.com/read/28770830/resveratrol-alleviates-diabetic-cardiomyopathy-in-rats-by-improving-mitochondrial-function-through-pgc-1%C3%AE-deacetylation
#17
Wei-Jin Fang, Chun-Jiang Wang, Yang He, Yu-Lu Zhou, Xiang-Dong Peng, Shi-Kun Liu
Recent evidence shows that resveratrol (RSV) may ameliorate high-glucose-induced cardiac oxidative stress, mitochondrial dysfunction and myocardial fibrosis in diabetes. However, the mechanisms by which RSV regu¬lates mitochondrial function in diabetic cardiomyopathy have not been fully elucidated. Mitochondrial dysfunction contributes to cardiac dysfunction in diabetic patients, which is associated with dysregulation of peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α). In this study we examined whether resveratrol alleviated cardiac dysfunction in diabetes by improving mitochondrial function via SIRT1-mediated PGC-1α deacetylation...
August 3, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28770033/epicardial-fat-thickness-is-correlated-with-vagal-hyperactivity-in-patients-with-neurally-mediated-syncope
#18
Kyoung Im Cho, Young Soo Lee, Byong Kyu Kim, Bong Joon Kim, Kee Sik Kim
BACKGROUND: Epicardial fat tissue has unique endocrine and paracrine functions that affect the cardiac autonomic system. The head-up tilt test (HUTT) is a simple non-invasive measurement that assesses autonomic nervous system dysfunction. We investigated the association between epicardial fat thickness (EFT) and autonomic neural tone, such as vagal tone. METHODS: A total of 797 consecutive patients (mean age 46.5 years, male: 45.7%) who underwent HUTT and echocardiography between March 2006 and June 2015 were enrolled...
June 2017: Journal of Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28760408/relationship-between-serum-inflammatory-markers-and-vascular-function-in-a-cohort-of-adolescents-with-type-1-diabetes
#19
Etienne Sochett, Damien Noone, Michael Grattan, Cameron Slorach, Rahim Moineddin, Yesmino Elia, Farid H Mahmud, David B Dunger, Neil Dalton, David Cherney, James Scholey, Heather Reich, John Deanfield
OBJECTIVE: The contribution of inflammation to endothelial/vascular dysfunction in early Type I Diabetes (T1D) is not well understood. The objective of this study was to examine the interaction between systemic inflammation and vascular function in adolescent's with and without-T1D. METHODS: 51 subjects from our observational cohort of adolescents with T1D (JDRF-CCTN), and 59 healthy controls (HC) were studied. Serum cytokines-chemokines were quantified using Human 41-Plex Array, and vascular function was measured by Flow Mediated Dilatation (FMD), Pulse Wave Velocity (PWV) and Blood Pressure (BP)...
July 28, 2017: Cytokine
https://www.readbyqxmd.com/read/28759817/left-atrial-remodeling-hypertrophy-and-fibrosis-in-mouse-models-of-heart-failure
#20
Waqas Hanif, Linda Alex, Ya Su, Arti V Shinde, Ilaria Russo, Na Li, Nikolaos G Frangogiannis
Left ventricular dysfunction increases left atrial pressures and causes atrial remodeling. In human subjects, increased left atrial size is a powerful predictor of mortality and adverse events in a broad range of cardiac pathologic conditions. Moreover, structural remodeling of the atrium plays an important role in the pathogenesis of atrial tachyarrhythmias. Despite the potential value of the atrium in assessment of functional endpoints in myocardial disease, atrial pathologic alterations in mouse models of left ventricular disease have not been systematically investigated...
September 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
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