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Hypertrophy cardiomyopathy

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https://www.readbyqxmd.com/read/28453725/serelaxin-treatment-promotes-adaptive-hypertrophy-but-does-not-prevent-heart-failure-in-experimental-peripartum-cardiomyopathy
#1
Justus Nonhoff, Melanie Ricke-Hoch, Mirco Mueller, Britta Stapel, Tobias Pfeffer, Martina Kasten, Michaela Scherr, Constantin von Kaisenberg, Johann Bauersachs, Arash Haghikia, Denise Hilfiker-Kleiner
Aims: Peripartum cardiomyopathy (PPCM) is a systolic left ventricular dysfunction developing in the peripartum phase in previously healthy women. Relaxin-2 is a pregnancy hormone with potential beneficial effects in heart failure patients. We evaluated Relaxin-2 as a potential diagnostic marker and/or a therapeutic agent in PPCM. Methods and results: In healthy peripartum women, serum Relaxin-2 levels (measured by ELISA in the second half of pregnancy) were elevated showing a decreasing trend in the first postpartum week and returned to non-pregnant levels thereafter...
May 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28446882/modified-low-dose-triiodo-l-thyronine-therapy-safely-improves-function-following-myocardial-ischemia-reperfusion-injury
#2
Viswanathan Rajagopalan, Youhua Zhang, Christine Pol, Clifford Costello, Samantha Seitter, Ann Lehto, Olga V Savinova, Yue-Feng Chen, A Martin Gerdes
Background: We have shown that thyroid hormones (THs) are cardioprotective and can be potentially used as safe therapeutic agents for diabetic cardiomyopathy and permanent infarction. However, no reliable, clinically translatable protocol exists for TH treatment of myocardial ischemia-reperfusion (IR) injury. We hypothesized that modified low-dose triiodo-L-thyronine (T3) therapy would confer safe therapeutic benefits against IR injury. Methods: Adult female rats underwent left coronary artery ligation for 60 min or sham surgeries...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28439652/myocardial-extracellular-volume-fraction-quantified-by-cardiovascular-magnetic-resonance-is-increased-in-hypertension-and-associated-with-left-ventricular-remodeling
#3
Shuli Wang, Hongjie Hu, Minjie Lu, Arlene Sirajuddin, Jinghui Li, Jing An, Xiuyu Chen, Gang Yin, Tian Lan, Linlin Dai, Yan Zhang, Xiaorong Yin, Lei Song, Aimin Dang, Peter Kellman, Andrew E Arai, Shihua Zhao
OBJECTIVES: To determine whether extracellular volume fraction (ECV) quantification by cardiac magnetic resonance (CMR) can demonstrate left ventricle (LV) abnormalities and relationship between ECV and LV remodeling in hypertension (HTN) patients METHODS: ECV quantification was prospectively performed in 134 consecutive HTN patients and 97 healthy subjects. Individual and regional ECV were compared to the regions on late gadolinium enhancement (LGE) images. Statistical analysis of the relationship between LV global functional parameters and ECV was carried out using Pearson's correlation, Student's t test and multiple regressions...
April 24, 2017: European Radiology
https://www.readbyqxmd.com/read/28439258/diabetic-cardiomyopathy-an-immunometabolic-perspective
#4
REVIEW
Paras K Mishra, Wei Ying, Shyam Sundar Nandi, Gautam K Bandyopadhyay, Kaushik K Patel, Sushil K Mahata
The heart possesses a remarkable inherent capability to adapt itself to a wide array of genetic and extrinsic factors to maintain contractile function. Failure to sustain its compensatory responses results in cardiac dysfunction, leading to cardiomyopathy. Diabetic cardiomyopathy (DCM) is characterized by left ventricular hypertrophy and reduced diastolic function, with or without concurrent systolic dysfunction in the absence of hypertension and coronary artery disease. Changes in substrate metabolism, oxidative stress, endoplasmic reticulum stress, formation of extracellular matrix proteins, and advanced glycation end products constitute the early stage in DCM...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28435089/cobalt-chloride-induces-rhoa-rock-activation-and-remodeling-effect-in-h9c2-cardiomyoblasts-involvement-of-pi3k-akt-and-mapk-pathways
#5
Cheng-I Cheng, Yueh-Hong Lee, Po-Han Chen, Yu-Chun Lin, Ming-Huei Chou, Ying-Hsien Kao
Chronic heart failure is a serious complication of myocardial infarction, one of the major causes of death worldwide that often leads to adverse cardiac hypertrophy and poor prognosis. Hypoxia-induced cardiac tissue remodeling is considered an important underlying etiology. This study aimed to delineate the signaling profiles of RhoA/ROCK, PI3K/Akt, and MAPK and their involvement in regulation of remodeling events in cultured H9c2 cardiomyoblast cells. In addition to its growth-suppressive effect, the hypoxia-mimetic chemical, cobalt chloride (CoCl2) significantly induced RhoA kinase activation as revealed by increased MBS phosphorylation and ROCK1/2 expression in H9c2 cells...
April 21, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28429347/sumoylation-in-cardiac-disorders-a-review
#6
X-C Li, Y Zeng, R-R Sun, M Liu, S Chen, P-Y Zhang
SUMOylation regulates diverse cellular processes including transcription, cell cycle, protein stability, and apoptosis. A recent research has now revealed the role of SUMO1 in cardiac disorders. Studies have evidenced that failing heart induces SUMO2/3 conjugation. Moreover, increased SUMO2/3- dependent modification has been observed to result in congestive heart disease such as cardiac hypertrophy by promoting cardiac cell death. Also, few recent studies have confirmed the role of SUMOylation in cardiac protein degradation...
April 2017: European Review for Medical and Pharmacological Sciences
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
#7
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/28427040/cortex-mori-radicis-extract-attenuates-myocardial-damages-in-diabetic-rats-by-regulating-ers
#8
Jiangfang Lian, Jiayuan Chen, Yanyan Yuan, Jiayi Chen, M Daud M Sayed, Lin Luo, Yabing Zhu, Song Li, Shizhong Bu
Diabetic cardiomyopathy (DCM) is diagnosed when patients with diabetes develop ventricular dysfunction but do not exhibit coronary atherosclerosis or hypertension. Cortex Mori (CM) Radicis,he epidermis of the root of Morus alba L, has been traditionally used for cough treatment in oriental medicine. In this study, we investigated the protection of myocardium by CM in streptozotocin (STZ)-induced diabetic rats and the underlying mechanisms. Diabetes was induced in rats by an injection of STZ at 25mg/kg. The animals were randomly divided into 4 groups: control, diabetes, diabetes with CM treatment, diabetes with CM preventative treatment...
April 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28423723/honokiol-an-activator-of-sirtuin-3-sirt3-preserves-mitochondria-and-protects-the-heart-from-doxorubicin-induced-cardiomyopathy-in-mice
#9
Vinodkumar B Pillai, Abhinav Kanwal, Yong Hu Fang, Willard W Sharp, Sadhana Samant, Jack Arbiser, Mahesh P Gupta
Doxorubicin is the chemotherapeutic drug of choice for a wide variety of cancers, and cardiotoxicity is one of the major side effects of doxorubicin treatment. One of the main cellular targets of doxorubicin in the heart is mitochondria. Mitochondrial sirtuin, SIRT3 has been shown to protect against doxorubicin-induced cardiotoxicity. We have recently identified honokiol (HKL) as an activator of SIRT3, which protects the heart from developing pressure overload hypertrophy. Here, we show that HKL-mediated activation of SIRT3 also protects the heart from doxorubicin-induced cardiac damage without compromising the tumor killing potential of doxorubicin...
March 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414603/cardiovascular-findings-in-ponies-with-equine-metabolic-syndrome
#10
Natalie Heliczer, Vinzenz Gerber, Rupert Bruckmaier, Johannes H van der Kolk, Cristobal Navas de Solis
OBJECTIVE To determine whether hypertension, high sympathetic tone, resting and exercising arrhythmias, and echocardiographic changes consistent with hypertensive cardiomyopathy were associated with equine metabolic syndrome (EMS) in ponies. DESIGN Prospective case-control study. ANIMALS 19 privately owned ponies with a diagnosis of EMS (history of laminitis, body condition score ≥ 7/9, cresty neck score ≥ 3/5, and abnormal oral sugar test result; cases) and 20 healthy control ponies. PROCEDURES Heart rate (HR), noninvasively measured arterial blood pressure (BP), markers of autonomic tone (splenic volume and HR variability), 24-hour and exercising ECGs, and echocardiograms were compared between cases and controls...
May 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28413926/dusp-1-gene-expression-is-not-regulated-by-promoter-methylation-in-diabetes-associated-cardiac-hypertrophy
#11
Gurinder Bir Singh, Sanskriti Khanna, Satish K Raut, Saurabh Sharma, Rajni Sharma, Madhu Khullar
BACKGROUND: The exact mechanism causing decreased expression of the dual specific phosphatase-1 ( DUSP-1) gene in diabetes-associated cardiac hypertrophy is not known. DNA promoter methylation is often associated with decreased gene expression in many diseases including cardiovascular diseases. So, we investigated whether epigenetic silencing via promoter methylation is involved in the decreased expression of DUSP-1 in diabetes-associated cardiac hypertrophy. METHODS: Real-time polymerase chain reaction (PCR) and Western blotting confirmed the down regulation of the DUSP-1 gene at transcriptional and translational levels...
April 1, 2017: Therapeutic Advances in Cardiovascular Disease
https://www.readbyqxmd.com/read/28409012/enhancing-the-diagnosis-of-fabry-disease-in-cardiology-with-a-targeted-information-a-before-after-control-impact-study
#12
Anne-Louise Savary, Remy Morello, Carole Brasse-Lagnel, Paul Milliez, Soumeya Bekri, Fabien Labombarda
BACKGROUND: Cardiac complications in Fabry disease are frequent and dominated by a high frequency of left ventricular hypertrophy; therefore, cardiologists may have an essential role in screening for this disease. Providing cardiologists with targeted information on Fabry disease would be valuable and could reduce both diagnostic and therapeutic delays. The aim of this study was to evaluate the efficiency of such strategy for Fabry screening. METHODS: We conducted a before-after control-impact study by comparing observations made before and after targeted information on Fabry disease among cardiologists...
2017: Open Heart
https://www.readbyqxmd.com/read/28408782/assessment-of-regional-left-ventricular-systolic-function-by-strain-imaging-echocardiography-in-phenotypically-normal-and-abnormal-maine-coon-cats-tested-for-the-a31p-mutation-in-the-mybpc3-gene
#13
Arine Pellegrino, Alexandre G T Daniel, Guilherme G Pereira, Paula H Itikawa, Maria Helena M A Larsson
Myocardial dysfunction occurs in cats with hypertrophic cardiomyopathy (HCM), but little is known about the early stages of the disease. Strain imaging echocardiography is a method that enables the quantitative assessment of myocardial function and deformity, allowing the characterization of systolic dysfunction. The objective of this study was to assess systolic function using strain imaging echocardiography in Maine coon cats genetically tested for the A31P mutation in the MYBPC3 gene, with and without ventricular hypertrophy...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28407402/cirrhotic-cardiomyopathy-implications-for-liver-transplantation
#14
REVIEW
Hongqun Liu, Saumya Jayakumar, Mouhieddin Traboulsi, Samuel S Lee
The majority of the patients on a waiting list for liver transplantation have end-stage liver disease. Due to the marked peripheral vasodilatation of end stage cirrhosis that masks a latent myocardial dysfunction, cardiac abnormalities in the resting state are usually subclinical and escape the attention of physicians. However, when challenged, the systolic and diastolic contractile responses are attenuated. In addition to these contractile abnormalities, morphological changes such as enlargement or hypertrophy of cardiac chambers and electrophysiological repolarization changes including a prolonged QT interval can be observed...
April 13, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28400922/pheochromocytoma-and-stress-cardiomyopathy-insight-into-pathogenesis
#15
Sahil Agrawal, Jamshid Shirani, Lohit Garg, Amitoj Singh, Santo Longo, Angelita Longo, Mark Fegley, Lauren Stone, Muhammad Razavi, Nicoleta Radoianu, Sudip Nanda
AIM: To investigate the occurrence of cardiomyopathy (CMP) in a cohort of patients with histologically proven pheochromocytoma (pheo), and to determine if catecholamine excess was causative of the left ventricular (LV) dysfunction. METHODS: A retrospective chart review spanning years 1998 through 2014 was undertaken and patients with a diagnosis of pheo confirmed with histopathologic examination were included. Presenting electrocardiograms and cardiac imaging studies were reviewed...
March 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28396567/inhibition-of-pikfyve-prevents-myocardial-apoptosis-and-hypertrophy-through-activation-of-sirt3-in-obese-mice
#16
Helene Tronchere, Mathieu Cinato, Andrei Timotin, Laurie Guitou, Camille Villedieu, Helene Thibault, Delphine Baetz, Bernard Payrastre, Philippe Valet, Angelo Parini, Oksana Kunduzova, Frederic Boal
PIKfyve is an evolutionarily conserved lipid kinase that regulates pleiotropic cellular functions. Here, we identify PIKfyve as a key regulator of cardiometabolic status and mitochondrial integrity in chronic diet-induced obesity. In vitro, we show that PIKfyve is critical for the control of mitochondrial fragmentation and hypertrophic and apoptotic responses to stress. We also provide evidence that inactivation of PIKfyve by the selective inhibitor STA suppresses excessive mitochondrial ROS production and apoptosis through a SIRT3-dependent pathway in cardiomyoblasts...
April 10, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28396031/penetrance-of-hypertrophic-cardiomyopathy-in-children-who-are-mutation-positive
#17
Alexa M C Vermeer, Sally-Ann B Clur, Nico A Blom, Arthur A M Wilde, Imke Christiaans
OBJECTIVES: To investigate the presence of hypertrophic cardiomyopathy (HCM) at first cardiac evaluation and during follow-up and cardiac events in predictively tested children who are mutation positive. STUDY DESIGN: The study included 119 predictively tested children who were mutation positive, with a mean age of 12.1 years. A family history and clinical variables from all cardiac evaluations after predictive genetic testing were recorded. Outcome measures were a clinical diagnosis of HCM, death, and cardiac events...
April 7, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28395011/metabolism-in-cardiomyopathy-every-substrate-matters
#18
Julia Ritterhoff, Rong Tian
Cardiac metabolism is highly adaptive to changes in fuel availability and the energy demand of the heart. This metabolic flexibility is key for the heart to maintain its output during the development and in response to stress. Alterations in substrate preference have been observed in multiple disease states; a clear understanding of their impact on cardiac function in the long term is critical for the development of metabolic therapies. In addition, the contribution of cellular metabolism to growth, survival, and other signalling pathways through the generation of metabolic intermediates has been increasingly noted, adding another layer of complexity to the impact of metabolism on cardiac function...
March 15, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28395009/an-overview-of-the-inflammatory-signalling-mechanisms-in-the-myocardium-underlying-the-development-of-diabetic-cardiomyopathy
#19
Giacomo Frati, Leonardo Schirone, Isotta Chimenti, Derek Yee, Giuseppe Biondi-Zoccai, Massimo Volpe, Sebastiano Sciarretta
Heart failure is a highly morbid and mortal clinical condition that represents the last stage of most cardiovascular disorders. Diabetes is strongly associated with an increased incidence of heart failure and directly promotes cardiac hypertrophy, fibrosis, and apoptosis. These changes, in turn, contribute to the development of ventricular dysfunction. The clinical condition associated with the spectrum of cardiac abnormalities induced by diabetes is termed diabetic cardiomyopathy. Myocardial inflammation has recently emerged as a pathophysiological process contributing to cardiac hypertrophy, fibrosis, and dysfunction in cardiac diseases...
March 15, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28393127/novel-junctophilin-2-mutation-a405s-is-associated-with-basal-septal-hypertrophy-and-diastolic-dysfunction
#20
Ann P Quick, Andrew P Landstrom, Qiongling Wang, David L Beavers, Julia O Reynolds, Giselle Barreto-Torres, Viet Tran, Jordan Showell, Leonne E Philippen, Shaine A Morris, Darlene Skapura, J Martijn Bos, Steen E Pedersen, Robia G Pautler, Michael J Ackerman, Xander H T Wehrens
BACKGROUND: Hypertrophic cardiomyopathy (HCM), defined as asymmetric left ventricular hypertrophy, is a leading cause of cardiac death in the young. Perturbations in calcium (Ca(2+)) handling proteins have been implicated in the pathogenesis of HCM. JPH2-encoded junctophilin 2 is a major component of the junctional membrane complex, the subcellular microdomain involved in excitation-contraction coupling. We hypothesized that a novel JPH2 mutation identified in patients with HCM is causally linked to HCM, and alters intracellular Ca(2+) signaling in a pro-hypertrophic manner...
February 2017: JACC. Basic to Translational Science
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