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Genetic cardiomyopathy

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https://www.readbyqxmd.com/read/29457878/genetic-determinants-of-heart-failure-facts-and-numbers
#1
EDITORIAL
Frauke S Czepluch, Bernd Wollnik, Gerd Hasenfuß
The relevance of gene mutations leading to heart diseases and hence heart failure has become evident. The risk for and the course of heart failure depends on genomic variants and mutations underlying the so-called genetic predisposition. Genetic contribution to heart failure is highly heterogenous and complex. For any patient with a likely inherited heart failure syndrome, genetic counselling is recommended and important. In the last few years, novel sequencing technologies (named next-generation sequencing - NGS) have dramatically improved the availability of molecular testing, the efficiency of genetic analyses, and moreover reduced the cost for genetic testing...
February 19, 2018: ESC Heart Failure
https://www.readbyqxmd.com/read/29456632/arrhythmogenic-cardiomyopathy-identification-of-desmosomal-gene-variations-and-desmosomal-protein-expression-in-variation-carriers
#2
Li Wang, Shenghua Liu, Hongliang Zhang, Shengshou Hu, Yingjie Wei
Arrhythmogenic cardiomyopathy (AC) is an inherited disorder that is predominantly present in the right ventricular myocardium. Mutations in the genes encoding the desmosomal protein are thought to underlie the pathogenesis of AC. Since AC is genetically heterogeneous and phenotypically diverse, modifier genes and environmental factors have an important role in disease expression. The aim of the present study was to identify AC-associated desmosomal gene variations, and examine the expression levels of intercalated disc proteins in AC patients who carry the variations (DSG2 p...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29454680/cardiomyopathy-in-the-pediatric-patients
#3
REVIEW
Shi-Min Yuan
Pediatric cardiomyopathies are a group of myocardial diseases with complex taxonomies. Cardiomyopathy can occur in children at any age, and it is a common cause of heart failure and heart transplantation in children. The incidence of pediatric cardiomyopathy is increasing with time. They may be associated with variable comorbidities, which are most often arrhythmia, heart failure, and sudden death. Medical imaging technologies, including echocardiography, cardiac magnetic resonance, and nuclear cardiology, are helpful in reaching a diagnosis of cardiomyopathy...
January 31, 2018: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/29452156/establishment-of-a-prkag2-cardiac-syndrome-disease-model-and-mechanism-study-using-human-induced-pluripotent-stem-cells
#4
Yongkun Zhan, Xiaolei Sun, Bin Li, Huanhuan Cai, Chen Xu, Qianqian Liang, Chao Lu, Ruizhe Qian, Sifeng Chen, Lianhua Yin, Wei Sheng, Guoying Huang, Aijun Sun, Junbo Ge, Ning Sun
PRKAG2 cardiac syndrome is a distinct form of human cardiomyopathy characterized by cardiac hypertrophy, ventricular pre-excitation and progressive cardiac conduction disorder. However, it remains unclear how mutations in the PRKAG2 gene give rise to such a complicated disease. To investigate the underlying molecular mechanisms, we generated disease-specific hiPSC-derived cardiomyocytes from two brothers both carrying a heterozygous missense mutation c.905G>A (R302Q) in the PRKAG2 gene and further corrected the R302Q mutation with CRISPR-Cas9 mediated genome editing...
February 13, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29447731/genetics-clinical-features-and-long-term-outcome-of-noncompaction-cardiomyopathy
#5
Jaap I van Waning, Kadir Caliskan, Yvonne M Hoedemaekers, Karin Y van Spaendonck-Zwarts, Annette F Baas, S Matthijs Boekholdt, Joost P van Melle, Arco J Teske, Folkert W Asselbergs, Ad P C M Backx, Gideon J du Marchie Sarvaas, Michiel Dalinghaus, Johannes M P J Breur, Marijke P M Linschoten, Laura A Verlooij, Isabella Kardys, Dennis Dooijes, Ronald H Lekanne Deprez, Arne S IJpma, Maarten P van den Berg, Robert M W Hofstra, Marjon A van Slegtenhorst, Jan D H Jongbloed, Danielle Majoor-Krakauer
BACKGROUND: The clinical outcomes of noncompaction cardiomyopathy (NCCM) range from asymptomatic to heart failure, arrhythmias, and sudden cardiac death. Genetics play an important role in NCCM. OBJECTIVES: This study investigated the correlations among genetics, clinical features, and outcomes in adults and children diagnosed with NCCM. METHODS: A retrospective multicenter study from 4 cardiogenetic centers in the Netherlands classified 327 unrelated NCCM patients into 3 categories: 1) genetic, with a mutation in 32% (81 adults; 23 children) of patients; 2) probably genetic, familial cardiomyopathy without a mutation in 16% (45 adults; 8 children) of patients; or 3) sporadic, no family history, without mutation in 52% (149 adults; 21 children) of patients...
February 20, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29445930/zbtb17-loss-of-function-mutation-contributes-to-familial-dilated-cardiomyopathy
#6
Yu-Min Sun, Jun Wang, Ying-Jia Xu, Xin-Hua Wang, Fang Yuan, Hua Liu, Ruo-Gu Li, Min Zhang, Yan-Jie Li, Hong-Yu Shi, Liang Zhao, Xing-Biao Qiu, Xin-Kai Qu, Yi-Qing Yang
Dilated cardiomyopathy (DCM) is a common primary myocardial disease leading to congestive heart failure, arrhythmia and sudden cardiac death. Increasing studies demonstrate substantial genetic determinants for DCM. Nevertheless, DCM is of substantial genetic heterogeneity, and the genetic basis for DCM in most patients remains unclear. The present study was sought to investigate the association of a genetic variant in the ZBTB17 gene with DCM. A cohort of 158 unrelated patients with idiopathic DCM and a total of 230 unrelated, ethnically matched healthy individuals used as controls were recruited...
February 14, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29445263/noncompaction-cardiomyopathy-and-heterotaxy-syndrome
#7
Hugo R Martinez, Stephanie M Ware, Marcus S Schamberger, John J Parent
Left ventricular noncompaction cardiomyopathy (LVNC) is characterized by compact and trabecular layers of the left ventricular myocardium. This cardiomyopathy may occur with congenital heart disease (CHD). Single cases document co-occurrence of LVNC and heterotaxy, but no data exist regarding the prevalence of this association. This study sought to determine whether a non-random association of LVNC and heterotaxy exists by evaluating the prevalence of LVNC in patients with heterotaxy. In a retrospective review of the Indiana Network for Patient Care, we identified 172 patients with heterotaxy (69 male, 103 female)...
September 2017: Progress in Pediatric Cardiology
https://www.readbyqxmd.com/read/29440775/genetic-defects-in-mtdna-encoded-protein-translation-cause-pediatric-mitochondrial-cardiomyopathy-with-early-onset-brain-disease
#8
Rick Kamps, Radek Szklarczyk, Tom E Theunissen, Debby M E I Hellebrekers, Suzanne C E H Sallevelt, Iris B Boesten, Bart de Koning, Bianca J van den Bosch, Gajja S Salomons, Marisa Simas-Mendes, Rob Verdijk, Kees Schoonderwoerd, Irenaeus F M de Coo, Jo M Vanoevelen, Hubert J M Smeets
This study aims to identify gene defects in pediatric cardiomyopathy and early-onset brain disease with oxidative phosphorylation (OXPHOS) deficiencies. We applied whole-exome sequencing in three patients with pediatric cardiomyopathy and early-onset brain disease with OXPHOS deficiencies. The brain pathology was studied by MRI analysis. In consanguineous patient 1, we identified a homozygous intronic variant (c.850-3A > G) in the QRSL1 gene, which was predicted to cause abnormal splicing. The variant segregated with the disease and affected the protein function, which was confirmed by complementation studies, restoring OXPHOS function only with wild-type QRSL1...
February 13, 2018: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/29438530/hypertrophic-obstructive-cardiomyopathy-what-when-why-for-whom
#9
Carlos A Mestres, Thomas Bartel, Antonio Sorgente, Silvana Müller, Christiane Gruner, Joseph Dearani, Eduard Quintana
Hypertrophic cardiomyopathy is the most common genetic cardiovascular disorder and is associated with symptoms of heart failure and increased risk of sudden cardiac death. The most common condition is obstruction of the left ventricular outflow tract. Surgical septal myectomy and alcohol septal ablation are the 2 accepted modes of septal reduction therapy and are indicated when there are advanced symptoms and a peak left ventricular outflow gradient ≥50 mmHg. Advantages of alcohol septal ablation are limited groin approach, reduction of obstruction of the left ventricular outflow tract and functional improvement, but there are higher chances for intracardiac device implantation and residual obstruction...
February 9, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29438387/genetic-association-study-of-nlrp1-card-and-casp1-inflammasome-genes-with-chronic-chagas-cardiomyopathy-among-trypanosoma-cruzi-seropositive-patients-in-bolivia
#10
Steven J Clipman, Josephine Henderson-Frost, Katherine Y Fu, Caryn Bern, Jorge Flores, Robert H Gilman
About 20-30% of people infected with Chagas disease present with chronic Chagas cardiomyopathy (CCC), the most serious and frequent manifestation of the disease, while others remain asymptomatic and often do not experience Chagas-specific mortality. It is not currently well understood what causes these differential disease outcomes, but a genetic predisposition within the host could play an important role. This study examined variants in the NLRP1, CARD, and CASP1 inflammasome genes among 62 T. cruzi seropositive patients from Bolivia (38 cases with CCC and 24 asymptomatic controls) to uncover associations with CCC...
2018: PloS One
https://www.readbyqxmd.com/read/29431384/cardiomyopathy-an-overview
#11
Jay Brieler, Matthew A Breeden, Jane Tucker
The definition and classification of cardiomyopathy have evolved considerably in recent years. Cardiomyopathy can be separated into primary (genetic, mixed, or acquired) and secondary categories, which result in varied phenotypes including dilated, hypertrophic, and restrictive patterns. Hypertrophic cardiomyopathy is the most common primary cardiomyopathy and can cause exertional dyspnea, presyncope, atypical chest pain, heart failure, and sudden cardiac death. Dilated cardiomyopathy can be genetic or acquired and typically presents with classic symptoms of heart failure with reduced ejection fraction...
November 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/29431102/pediatric-dilated-cardiomyopathy-associated-lrrc10-leucine-rich-repeat-containing-10-variant-reveals-lrrc10-as-an-auxiliary-subunit-of-cardiac-l-type-ca2-channels
#12
Marites T Woon, Pamela A Long, Louise Reilly, Jared M Evans, Alexis M Keefe, Martin R Lea, Carl J Beglinger, Ravi C Balijepalli, Youngsook Lee, Timothy M Olson, Timothy J Kamp
BACKGROUND: Genetic causes of dilated cardiomyopathy (DCM) are incompletely understood. LRRC10 (leucine-rich repeat-containing 10) is a cardiac-specific protein of unknown function. Heterozygous mutations in LRRC10 have been suggested to cause DCM, and deletion of Lrrc10 in mice results in DCM. METHODS AND RESULTS: Whole-exome sequencing was carried out on a patient who presented at 6 weeks of age with DCM and her unaffected parents, filtering for rare, deleterious, recessive, and de novo variants...
February 3, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29420653/estimating-the-mutational-load-for-cardiovascular-diseases-in-pakistani-population
#13
Muhammad Shakeel, Muhammad Irfan, Ishtiaq Ahmad Khan
The deleterious genetic variants contributing to certain diseases may differ in terms of number and allele frequency from population to population depending on their evolutionary background. Here, we prioritize the deleterious variants from Pakistani population in manually curated gene list already reported to be associated with common, Mendelian, and congenital cardiovascular diseases (CVDs) using the genome/exome sequencing data of Pakistani individuals publically available in 1000 Genomes Project (PJL), and Exome Aggregation Consortium (ExAC) South Asia...
2018: PloS One
https://www.readbyqxmd.com/read/29401584/deficiency-of-a-novel-gene-yulink-predisposes-to-heart-failure-and-ventricular-arrhythmia
#14
Chia-Ti Tsai, Ming-Wei Kuo, Jiunn-Lee Lin, Alice L Yu, John Yu
Heart failure is a major cardiovascular disease and is associated with significant morbidity and mortality. Sudden cardiac death (SCD) in heart failure is a disastrous cardiovascular phenomenon. However, few studies have examined the genetic background that determines susceptibility to heart failure and SCD. We found that deficiency of a newly identified gene, Yulink, promoted cardiac alternans in zebrafish cardiomyocytes, and genetic knockdown (KD) resulted in pericardial edema, decreased cardiac output, and premature ventricular contractions...
January 11, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29398688/late-gadolinium-enhancement-for-prediction-of-mutation-positive-hypertrophic-cardiomyopathy-on-the-basis-of-panel-wide-sequencing
#15
Ryota Teramoto, Noboru Fujino, Tetsuo Konno, Akihiro Nomura, Yoji Nagata, Toyonobu Tsuda, Hayato Tada, Kenji Sakata, Masakazu Yamagishi, Kenshi Hayashi, Masa-Aki Kawashiri
BACKGROUND: Cardiac magnetic resonance (CMR) with late gadolinium enhancement (LGE) revealed a substantial variation in the extent of myocardial scarring, a pathological hallmark of hypertrophic cardiomyopathy (HCM). However, few data exist regarding the relationship between the presence of gene mutations and the extent of LGE. Therefore, we aimed to investigate whether variations in the extent of LGE in HCM patients can be explained by the presence or absence of disease-causing mutations...
February 3, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29398271/tread-carefully-a-functional-variant-in-the-human-nadph-oxidase-4-nox4-is-not-disease-causing
#16
Michael Nafisinia, Minal Juliet Menezes, Wendy Anne Gold, Lisa Riley, Joshua Hatch, John Cardinal, David Coman, John Christodoulou
In this study, we report a paediatric patient with a lethal phenotype of respiratory distress, failure to thrive, pancreatic insufficiency, liver dysfunction, hypertrophic cardiomyopathy, bone marrow suppression, humoral and cellular immune deficiency. To identify the genetic basis of this unusual clinical phenotype and potentially make available the option of future prenatal testing, whole exome sequencing (WES) was used followed by functional studies in a bid to confirm pathogenicity. The WES we identified a homozygous novel variant, AK298328; c...
February 2, 2018: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29397027/hereditary-palmoplantar-keratodermas-part-ii-syndromic-palmoplantar-keratodermas-diagnostic-algorithm-and-principles-of-therapy
#17
REVIEW
L Guerra, M Castori, B Didona, D Castiglia, G Zambruno
Hereditary palmoplantar keratodermas (PPKs) comprise a large and heterogeneous group of disorders characterized by persistent thickening of the epidermis at palmar and plantar surfaces. Clinical and genetic features of isolated and complex PPKs have been reviewed in part I of this 2-part review. Here we focus on clinical and molecular classification of syndromic PPKs which are recognized by additional extracutaneous manifestations, in particular deafness, specific mucosal lesions, cardiomyopathy, inborn errors of metabolism, involvement of internal organs or disorders of sexual development...
February 3, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29390460/infantile-onset-pompe-disease-with-neonatal-debut-a-case-report-and-literature-review
#18
Miriam Martínez, Mar García Romero, Luis García Guereta, Marta Cabrera, Rita M Regojo, Luis Albajara, Maria L Couce, Miguel Saenz de Pipaon
RATIONALE: Infantile-onset Pompe disease, also known as glycogen storage disease type II, is a progressive and fatal disorder without treatment. Enzyme replacement therapy with recombinant human acid alpha-glucosidase (GAA) enhances survival; however, the best outcomes have been achieved with early treatment. PATIENT CONCERNS: We report a case of a newborn with infantile-onset Pompe disease diagnosed in the first days of life who did not undergo universal neonatal screening...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29387042/type-2-diabetes-mellitus-and-cardiovascular-disease-genetic-and-epigenetic-links
#19
REVIEW
Salvatore De Rosa, Biagio Arcidiacono, Eusebio Chiefari, Antonio Brunetti, Ciro Indolfi, Daniela P Foti
Type 2 diabetes mellitus (DM) is a common metabolic disorder predisposing to diabetic cardiomyopathy and atherosclerotic cardiovascular disease (CVD), which could lead to heart failure through a variety of mechanisms, including myocardial infarction and chronic pressure overload. Pathogenetic mechanisms, mainly linked to hyperglycemia and chronic sustained hyperinsulinemia, include changes in metabolic profiles, intracellular signaling pathways, energy production, redox status, increased susceptibility to ischemia, and extracellular matrix remodeling...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29386531/genetic-basis-of-cardiomyopathy-and-the-genotypes-involved-in-prognosis-and-left-ventricular-reverse-remodeling
#20
Takashige Tobita, Seitaro Nomura, Takanori Fujita, Hiroyuki Morita, Yoshihiro Asano, Kenji Onoue, Masamichi Ito, Yasushi Imai, Atsushi Suzuki, Toshiyuki Ko, Masahiro Satoh, Kanna Fujita, Atsuhiko T Naito, Yoshiyuki Furutani, Haruhiro Toko, Mutsuo Harada, Eisuke Amiya, Masaru Hatano, Eiki Takimoto, Tsuyoshi Shiga, Toshio Nakanishi, Yasushi Sakata, Minoru Ono, Yoshihiko Saito, Seiji Takashima, Nobuhisa Hagiwara, Hiroyuki Aburatani, Issei Komuro
Dilated cardiomyopathy (DCM) and hypertrophic cardiomyopathy (HCM) are genetically and phenotypically heterogeneous. Cardiac function is improved after treatment in some cardiomyopathy patients, but little is known about genetic predictors of long-term outcomes and myocardial recovery following medical treatment. To elucidate the genetic basis of cardiomyopathy in Japan and the genotypes involved in prognosis and left ventricular reverse remodeling (LVRR), we performed targeted sequencing on 120 DCM (70 sporadic and 50 familial) and 52 HCM (15 sporadic and 37 familial) patients and integrated their genotypes with clinical phenotypes...
January 31, 2018: Scientific Reports
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