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cardiomyopathy dilated

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https://www.readbyqxmd.com/read/28745540/p53-and-mdm2-act-synergistically-to-maintain-cardiac-homeostasis-and-mediate-cardiomyocyte-cell-cycle-arrest-through-a-network-of-micrornas
#1
Shanna Stanley-Hasnain, Ludger Hauck, Daniela Grothe, Roozbeh Aschar-Sobbi, Sanja Beca, Jagdish Butany, Peter H Backx, Tak W Mak, Filio Billia
Defining the roadblocks responsible for cell cycle arrest in adult cardiomyocytes lies at the core of developing cardiac regenerative therapies. p53 and Mdm2 are crucial mediators of cell cycle arrest in proliferative cell types, however little is known about their function in regulating homeostasis and proliferation in terminally differentiated cell types, like cardiomyocytes. To explore this, we generated a cardiac-specific conditional deletion of p53 and Mdm2 (DKO) in adult mice. Herein we describe the development of a dilated cardiomyopathy, in the absence of cardiac hypertrophy...
July 26, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28745466/dilated-cardiomyopathy-in-celiac-disease-what-is-the-plot-of-the-story
#2
Raffaella Mormile
No abstract text is available yet for this article.
October 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28745354/soybean-isoflavones-ameliorate-ischemic-cardiomyopathy-by-activating-nrf2-mediated-antioxidant-responses
#3
Yang Li, Haiyan Zhang
Ischemic cardiomyopathy (IC) is the major cause of heart failure. Conventional medicine has been proved ineffective with adverse effects. Soybean presents exciting adjunctive therapies and shows protective benefits for IC. However, the molecular mechanisms remain unclear. Isoflavones are the main bioactive components of soybean and may be protective against heart disease. Isoflavones were extracted by using an acidic-ethanol method and analyzed by HPLC. All patients with ischemic stroke were randomly and evenly assigned to two groups: the isoflavone group (80 mg day(-1), n = 100) and control group (80 mg day(-1) placebo, n = 100), and the whole period of the experiment was 24 weeks...
July 26, 2017: Food & Function
https://www.readbyqxmd.com/read/28744816/ace2-calm3-and-tnni3k-polymorphisms-as-potential-disease-modifiers-in-hypertrophic-and-dilated-cardiomyopathies
#4
Amit Kumar, Bindu Rani, Rajni Sharma, Gurjeet Kaur, Rishikesh Prasad, Ajay Bahl, Madhu Khullar
The marked clinical and genetic heterogeneity seen in hypertrophic (HCM) and dilated cardiomyopathies (DCM) suggests involvement of disease modifiers and environmental factors in the pathophysiology of these diseases. In the current study, we examined association of single nucleotide polymorphisms (SNPs) of three candidate genes, ACE2 (rs6632677), TNNI3K (rs49812611) and CALM3 (rs13477425) with clinical phenotypes of HCM and DCM patients of North Indian ethnicity. Prevalence of ACE2 (7160726 C>G) variant genotypes (CG and GG) was significantly higher in DCM subjects as compared to controls...
July 25, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28740583/hyperthyroidism-and-the-heart
#5
Patricia Mejia Osuna, Maja Udovcic, Morali D Sharma
Thyroid hormones have a significant impact on cardiac function and structure. Excess thyroid hormone affects cardiovascular hemodynamics, leading to high-output heart failure and, in late stages, dilated cardiomyopathy. In this review, we discuss how hyperthyroidism affects cardiovascular pathophysiology and molecular mechanisms and examine the complications caused by excess thyroid hormone, such as heart failure and atrial fibrillation.
April 2017: Methodist DeBakey Cardiovascular Journal
https://www.readbyqxmd.com/read/28737514/bag3-plays-a-central-role-in-proteostasis-in-the-heart
#6
Wataru Mizushima, Junichi Sadoshima
Proteinopathies are characterized by the accumulation of misfolded proteins, which ultimately interfere with normal cell function. While neurological diseases, such as Huntington disease and Alzheimer disease, are well-characterized proteinopathies, cardiac diseases have recently been associated with alterations in proteostasis. In this issue of the JCI, Fang and colleagues demonstrate that mice with cardiac-specific deficiency of the co-chaperone protein BCL2-associated athanogene 3 (BAG3) develop dilated cardiomyopathy that is associated with a destabilization of small HSPs as the result of a disrupted interaction between BAG3 and HSP70...
July 24, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28737513/loss-of-function-mutations-in-co-chaperone-bag3-destabilize-small-hsps-and-cause-cardiomyopathy
#7
Xi Fang, Julius Bogomolovas, Tongbin Wu, Wei Zhang, Canzhao Liu, Jennifer Veevers, Matthew J Stroud, Zhiyuan Zhang, Xiaolong Ma, Yongxin Mu, Dieu-Hung Lao, Nancy D Dalton, Yusu Gu, Celine Wang, Michael Wang, Yan Liang, Stephan Lange, Kunfu Ouyang, Kirk L Peterson, Sylvia M Evans, Ju Chen
Defective protein quality control (PQC) systems are implicated in multiple diseases. Molecular chaperones and co-chaperones play a central role in functioning PQC. Constant mechanical and metabolic stress in cardiomyocytes places great demand on the PQC system. Mutation and downregulation of the co-chaperone protein BCL-2-associated athanogene 3 (BAG3) are associated with cardiac myopathy and heart failure, and a BAG3 E455K mutation leads to dilated cardiomyopathy (DCM). However, the role of BAG3 in the heart and the mechanisms by which the E455K mutation leads to DCM remain obscure...
July 24, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28737196/-results-of-a-national-program-of-pediatric-heart-transplantation-strengths-and-weakness
#8
Pedro Becker, Santiago Besa, Sergio Riveros, Rodrigo González, Alfonso Navia, Paulina Dellepiane, Daniel Springmuller, Gonzalo Urcelay
Pediatric heart transplantation is an effective therapy to treat advanced heart failure in children. OBJECTIVES: To analyze the immediate and mid-term results of pediatric patients listed for heart transplantation. PATIENTS AND METHODS: Registration of patients admitted to our transplant protocol between October 2001 and July 2016 were reviewed, analyzing demographic data, diagnosis, status at the time of listing, waiting time until transplantation, donor data, use of ventricular assist device, hemodynamic data, complications and global mortality...
June 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28737018/increased-myocardial-native-t1-relaxation-time-in-patients-with-nonischemic-dilated-cardiomyopathy-with-complex-ventricular-arrhythmia
#9
Shiro Nakamori, An H Bui, Jihye Jang, Hossam A El-Rewaidy, Shingo Kato, Long H Ngo, Mark E Josephson, Warren J Manning, Reza Nezafat
PURPOSE: To study the relationship between diffuse myocardial fibrosis and complex ventricular arrhythmias (ComVA) in patients with nonischemic dilated cardiomyopathy (NICM). We hypothesized that NICM patients with ComVA would have a higher native myocardial T1 time, suggesting more extensive myocardial diffuse fibrosis. MATERIALS AND METHODS: We prospectively enrolled NICM patients with a history of ComVA (n = 50) and age-matched NICM patients without ComVA (n = 57)...
July 24, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28735322/viral-infection-of-the-heart-pathogenesis-and-diagnosis
#10
Mateusz Kuffner, Agnieszka Pawlak, Maciej Przybylski
Viral infections of the heart cause serious clinical problems, either as infectious myocarditis, which usually is a consequence of acute infection or as idiopathic dilated cardiomyopathy, resulting rather from a chronic infection. This minireview presents an up-to-date view on pathomechanisms of viral infection of the heart tissues, the role of immune system in controlling infectious process at its various stages and current possibilities of recognizing viral infection of the heart with use of both cardiological and virological methods...
January 2, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/28733782/catheter-ablation-of-atrial-fibrillation-an-overview-for-clinicians
#11
REVIEW
Nebojša Mujović, Milan Marinković, Radoslaw Lenarczyk, Roland Tilz, Tatjana S Potpara
Catheter ablation (CA) of atrial fibrillation (AF) is currently one of the most commonly performed electrophysiology procedures. Ablation of paroxysmal AF is based on the elimination of triggers by pulmonary vein isolation (PVI), while different strategies for additional AF substrate modification on top of PVI have been proposed for ablation of persistent AF. Nowadays, various technologies for AF ablation are available. The radiofrequency point-by-point ablation navigated by electro-anatomical mapping system and cryo-balloon technology are comparable in terms of the efficacy and safety of the PVI procedure...
July 21, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28732641/the-cardiomyopathy-associated-k15n-mutation-in-tropomyosin-alters-actin-filament-pointed-end-dynamics
#12
Mert Colpan, Thu Ly, Samantha Grover, Dmitri Tolkatchev, Alla S Kostyukova
Correct assembly of thin filaments composed of actin and actin-binding proteins is of crucial importance for properly functioning muscle cells. Tropomyosin (Tpm) mediates the binding of tropomodulin (Tmod) and leiomodin (Lmod) at the slow-growing, or pointed, ends of the thin filaments. Together these proteins regulate thin filament lengths and actin dynamics in cardiac muscle. The K15N mutation in the TPM1 gene is associated with familial dilated cardiomyopathy (DCM) but the effect of this mutation on Tpm's function is unknown...
July 18, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28731484/cpr-ecls-bvad-and-successful-heart-transplantation-within-2-months-a-single-centre-case-series-in-two-young-high-urgency-listed-patients
#13
Anna K Schmidt, Diyar Saeed, Arash Mehdiani, Bozena Sowinski, Ralf Westenfeld, Payam Akhyari, Artur Lichtenberg, Udo Boeken
INTRODUCTION: In times of organ shortage, death while on the heart waiting-list still represents a major problem. As a consequence, bridging to transplant as well as the decision when to escalate therapy play a very important role. METHODS AND RESULTS: We report on two young patients with dilated cardiomyopathy and acute decompensation who were successfully bridged to heart transplantation with both left and temporary right ventricular assist devices in just 2 months...
July 20, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28730386/erratum-to-changes-of-myocardial-gene-expression-and-protein-composition-in-patients-with-dilated-cardiomyopathy-after-immunoadsorption-with-subsequent-immunoglobulin-substitution
#14
Sabine Ameling, Gourav Bhardwaj, Elke Hammer, Daniel Beug, Leif Steil, Yvonne Reinke, Kerstin Weitmann, Markus Grube, Christiane Trimpert, Karin Klingel, Reinhard Kandolf, Wolfgang Hoffmann, Matthias Nauck, Marcus Dörr, Klaus Empen, Stephan B Felix, Uwe Völker
No abstract text is available yet for this article.
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28724804/pediatric-dilated-cardiomyopathy-hearts-display-a-unique-gene-expression-profile
#15
Philip D Tatman, Kathleen C Woulfe, Anis Karimpour-Fard, Danielle A Jeffrey, James Jaggers, Joseph C Cleveland, Karin Nunley, Matthew Rg Taylor, Shelley D Miyamoto, Brian L Stauffer, Carmen C Sucharov
Our previous work showed myocellular differences in pediatric and adult dilated cardiomyopathy (DCM). However, a thorough characterization of the molecular pathways involved in pediatric DCM does not exist, limiting the development of age-specific therapies. To characterize this patient population, we investigated the transcriptome profile of pediatric patients. RNA-Seq from 7 DCM and 7 nonfailing (NF) explanted age-matched pediatric left ventricles (LV) was performed. Changes in gene expression were confirmed by real-time PCR (RT-PCR) in 36 DCM and 21 NF pediatric hearts and in 20 DCM and 10 NF adult hearts...
July 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28724793/a-bag3-chaperone-complex-maintains-cardiomyocyte-function-during-proteotoxic-stress
#16
Luke M Judge, Juan A Perez-Bermejo, Annie Truong, Alexandre Js Ribeiro, Jennie C Yoo, Christina L Jensen, Mohammad A Mandegar, Nathaniel Huebsch, Robyn M Kaake, Po-Lin So, Deepak Srivastava, Beth L Pruitt, Nevan J Krogan, Bruce R Conklin
Molecular chaperones regulate quality control in the human proteome, pathways that have been implicated in many diseases, including heart failure. Mutations in the BAG3 gene, which encodes a co-chaperone protein, have been associated with heart failure due to both inherited and sporadic dilated cardiomyopathy. Familial BAG3 mutations are autosomal dominant and frequently cause truncation of the coding sequence, suggesting a heterozygous loss-of-function mechanism. However, heterozygous knockout of the murine BAG3 gene did not cause a detectable phenotype...
July 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28724792/pediatric-and-adult-dilated-cardiomyopathy-represent-distinct-pathological-entities
#17
Meghna D Patel, Jayaram Mohan, Caralin Schneider, Geetika Bajpai, Enkhsaikhan Purevjav, Charles E Canter, Jeffrey Towbin, Andrea Bredemeyer, Kory J Lavine
Pediatric dilated cardiomyopathy (DCM) is the most common indication for heart transplantation in children. Despite similar genetic etiologies, medications routinely used in adult heart failure patients do not improve outcomes in the pediatric population. The mechanistic basis for these observations is unknown. We hypothesized that pediatric and adult DCM comprise distinct pathological entities, in that children do not undergo adverse remodeling, the target of adult heart failure therapies. To test this hypothesis, we examined LV specimens obtained from pediatric and adult donor controls and DCM patients...
July 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28724790/med12-regulates-a-transcriptional-network-of-calcium-handling-genes-in-the-heart
#18
Kedryn K Baskin, Catherine A Makarewich, Susan M DeLeon, Wenduo Ye, Beibei Chen, Nadine Beetz, Heinrich Schrewe, Rhonda Bassel-Duby, Eric N Olson
The Mediator complex regulates gene transcription by linking basal transcriptional machinery with DNA-bound transcription factors. The activity of the Mediator complex is mainly controlled by a kinase submodule that is composed of 4 proteins, including MED12. Although ubiquitously expressed, Mediator subunits can differentially regulate gene expression in a tissue-specific manner. Here, we report that MED12 is required for normal cardiac function, such that mice with conditional cardiac-specific deletion of MED12 display progressive dilated cardiomyopathy...
July 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28723664/detecting-the-genetic-link-between-alzheimer-s-disease-and-obesity-using-bioinformatics-analysis-of-gwas-data
#19
Qi-Shuai Zhuang, Hao Zheng, Xiao-Dan Gu, Liang Shen, Hong-Fang Ji
Alzheimer's disease (AD) represents the major form of dementia in the elderly. In recent years, accumulating evidence indicate that obesity may act as a risk factor for AD, while the genetic link between the two conditions remains unclear. This bioinformatics analysis aimed to detect the genetic link between AD and obesity on single nucleotide polymorphisms (SNPs), gene, and pathway levels based on genome-wide association studies data. A total of 31 SNPs were found to be shared by AD and obesity, which were linked to 7 genes...
July 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28716623/a-second-truncation-in-ttn-causes-early-onset-recessive-muscular-dystrophy
#20
Elizabeth Harris, Ana Töpf, Anna Vihola, Anni Evilä, Rita Barresi, Judith Hudson, Peter Hackman, Brian Herron, Daniel MacArthur, Hanns Lochmüller, Kate Bushby, Bjarne Udd, Volker Straub
Mutations in the gene encoding the giant skeletal muscle protein titin are associated with a variety of muscle disorders, including recessive congenital myopathies ±cardiomyopathy, limb girdle muscular dystrophy (LGMD) and late onset dominant distal myopathy. Heterozygous truncating mutations have also been linked to dilated cardiomyopathy. The phenotypic spectrum of titinopathies is emerging and expanding, as next generation sequencing techniques make this large gene amenable to sequencing. We undertook whole exome sequencing in four individuals with LGMD...
June 22, 2017: Neuromuscular Disorders: NMD
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