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genetic causes of congenital heart disease

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https://www.readbyqxmd.com/read/29891551/cardiac-specific-developmental-and-epigenetic-functions-of-jarid2-during-embryonic-development
#1
Eunjin Cho, Mattew R Mysliwiec, Clayton D Carlson, Assem Z Ansari, Robert J Schwartz, Youngsook Lee
Epigenetic regulation is critical in normal cardiac development. We have demonstrated that the deletion of Jarid2  (Jumonji (Jmj) A/T-rich interaction domain 2) in mice results in cardiac malformations recapitulating human congenital cardiac disease and dysregulation of gene expression. However, the precise developmental and epigenetic functions of Jarid2 within the developing heart remain to be elucidated. Here, we determined the cardiac-specific functions of Jarid2 and the genetic networks regulated by Jarid2...
June 11, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29884292/role-of-genetic-heart-disease-in-sentinel-sudden-cardiac-arrest-survivors-across-the-age-spectrum
#2
John R Giudicessi, Michael J Ackerman
BACKGROUND: Sudden cardiac arrest (SCA) may be the sentinel expression of a sudden cardiac death-predisposing genetic heart disease (GHD). Although shown to underlie many unexplained SCAs in the young, the contribution of GHDs to sentinel SCA has never been quantified across the age spectrum. Thus, we sought to determine the contribution of GHDs in single-center referral cohort of non-ischemic SCA survivors. METHODS AND RESULTS: Retrospective analysis of 3037 patients was used to identify all individuals who experienced a sentinel event of SCA...
May 30, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29866040/genome-and-epigenome-analysis-of-monozygotic-twins-discordant-for-congenital-heart-disease
#3
Guoliang Lyu, Chao Zhang, Te Ling, Rui Liu, Le Zong, Yiting Guan, Xiaoke Huang, Lei Sun, Lijun Zhang, Cheng Li, Yu Nie, Wei Tao
BACKGROUND: Congenital heart disease (CHD) is the leading non-infectious cause of death in infants. Monozygotic (MZ) twins share nearly all of their genetic variants before and after birth. Nevertheless, MZ twins are sometimes discordant for common complex diseases. The goal of this study is to identify genomic and epigenomic differences between a pair of twins discordant for a form of congenital heart disease, double outlet right ventricle (DORV). RESULTS: A monoamniotic monozygotic (MZ) twin pair discordant for DORV were subjected to genome-wide sequencing and methylation analysis...
June 4, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29848184/two-brothers-with-dextro-transposition-of-the-great-arteries
#4
Joshua D Kurtz, Katerina Boucek, Minoo Kavarana, Andrew M Atz
Dextro-transposition of the great arteries (d-TGA) is a common cause of cyanotic heart disease in neonates. Current thought is d-TGA is a sporadic occurrence in families with an unclear etiology. We describe a case of brothers with d-TGA. Genetic testing revealed that both are heterozygous for two gene variations that are associated with congenital heart disease.
January 1, 2018: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/29843651/clinical-and-genetic-characteristics-of-pulmonary-arterial-hypertension-in-lebanon
#5
Ossama K Abou Hassan, Wiam Haidar, Georges Nemer, Hadi Skouri, Fadi Haddad, Imad BouAkl
BACKGROUND: Pulmonary arterial hypertension (PAH) is a rare disease with an incidence rate of 2-6 cases per million per year. Our knowledge of the disease in the Middle East and North Africa (MENA) region is limited by the small number of clinical studies and the complete absence of genetic studies. METHODS: Our aim was to shed light on the clinical and genetic characteristics of PAH in Lebanon and the region by using exome sequencing on PAH patients referred to the American University of Beirut Medical Center (AUBMC)...
May 30, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29792339/pulmonary-hypertension-in-congenital-heart-disease
#6
Emma Pascall, Robert Mr Tulloh
Pulmonary hypertension is defined as a mean pulmonary arterial pressure ≥25 mmHg. We focus on its relevance in congenital heart disease, reviewing pathophysiology, diagnosis and management. Pulmonary hypertension is a relatively common complication of congenital heart disease, with adult prevalence between 5 and 10%. A multifactorial cause is recognized, relating to the size and nature of cardiac defect as well as environmental and genetic factors. More complex disease is increasingly recognized rather than pure Eisenmenger complex...
May 24, 2018: Future Cardiology
https://www.readbyqxmd.com/read/29779390/-prenatally-diagnosed-case-of-pallister%C3%A2-killian-syndrome
#7
Zsolt Tidrenczel, Erika P Tardy, Edina Sarkadi, Judit Simon, Artúr Beke, János Demeter
Pallister-Killian syndrome (PKS) is a rare, sporadic genetic disorder that is caused by the mosaic presence of a supernumerary marker chromosome, isochromosome 12p. The syndrome is a polydysmorphic condition characterized by mental retardation, craniofacial dysmorphism, hypotonia, seizures, epilepsy and certain organic malformations (diaphragmatic hernia, congenital heart disease). Prenatal diagnosis is challenging due to the mosaic tissue-specific distribution of the chromosomal disorder and highly variable phenotype...
May 2018: Orvosi Hetilap
https://www.readbyqxmd.com/read/29774522/genome-wide-compound-heterozygosity-analysis-highlighted-four-novel-susceptibility-loci-for-congenital-heart-disease-in-chinese-population
#8
T Jiang, M Huang, T Jiang, Y Gu, Y Wang, Y Wu, H Ma, G Jin, J Dai, Z Hu
Genome-wide association studies (GWASs) have achieved great success in deciphering the genetic cause of congenital heart disease (CHD). However, the heritability of CHD remains to be clarified, and numerous genetic factors responsible for occurrence of CHD are yet unclear. In this study, we performed a genome-wide search for relaxed forms of compound heterozygosity (CH) in association with CHD using our existing GWAS data including 2,265 individuals (957 CHD cases and 1,308 controls). CollapsABEL was used to iteratively test the association between the CH genotype and CHD phenotype in a sliding window manner...
May 17, 2018: Clinical Genetics
https://www.readbyqxmd.com/read/29740699/de-novo-mutations-in-med13-a-component-of-the-mediator-complex-are-associated-with-a-novel-neurodevelopmental-disorder
#9
Lot Snijders Blok, Susan M Hiatt, Kevin M Bowling, Jeremy W Prokop, Krysta L Engel, J Nicholas Cochran, E Martina Bebin, Emilia K Bijlsma, Claudia A L Ruivenkamp, Paulien Terhal, Marleen E H Simon, Rosemarie Smith, Jane A Hurst, Heather McLaughlin, Richard Person, Amy Crunk, Michael F Wangler, Haley Streff, Joseph D Symonds, Sameer M Zuberi, Katherine S Elliott, Victoria R Sanders, Abigail Masunga, Robert J Hopkin, Holly A Dubbs, Xilma R Ortiz-Gonzalez, Rolph Pfundt, Han G Brunner, Simon E Fisher, Tjitske Kleefstra, Gregory M Cooper
Many genetic causes of developmental delay and/or intellectual disability (DD/ID) are extremely rare, and robust discovery of these requires both large-scale DNA sequencing and data sharing. Here we describe a GeneMatcher collaboration which led to a cohort of 13 affected individuals harboring protein-altering variants, 11 of which are de novo, in MED13; the only inherited variant was transmitted to an affected child from an affected mother. All patients had intellectual disability and/or developmental delays, including speech delays or disorders...
May 8, 2018: Human Genetics
https://www.readbyqxmd.com/read/29739726/new-onset-seizures-in-a-patient-with-long-qt-syndrome-lqts2-and-a-pathogenic-carboxyl-terminus-frameshift-variant-of-the-kcnh2-gene
#10
Katherine Zarroli, Henry Querfurth
In patients with Long QT Syndrome (LQTS), mutations in the potassium channel KCNH2 gene increase seizure susceptibility with missense mutations involving the pore region of the gene acting as a positive predictor of seizures. Seizures are less commonly reported in patients with carboxyl (C')-terminus mutations. This case report describes a young man who presented with syncope followed by a first seizure and was found to have LQTS caused by a pathogenic carboxyl-terminus deletion/frameshifting mutation of the KCNH2 gene...
May 5, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29725858/zebrafish-heart-failure-models-opportunities-and-challenges
#11
REVIEW
Xingjuan Shi, Ru Chen, Yu Zhang, Junghwa Yun, Koroboshka Brand-Arzamendi, Xiangdong Liu, Xiao-Yan Wen
Heart failure is a complex pathophysiological syndrome of pumping functional failure that results from injury, infection or toxin-induced damage on the myocardium, as well as genetic influence. Gene mutations associated with cardiomyopathies can lead to various pathologies of heart failure. In recent years, zebrafish, Danio rerio, has emerged as an excellent model to study human cardiovascular diseases such as congenital heart defects, cardiomyopathy, and preclinical development of drugs targeting these diseases...
May 3, 2018: Amino Acids
https://www.readbyqxmd.com/read/29704315/epigenetics-and-autism-spectrum-disorder-a-report-of-an-autism-case-with-mutation-in-h1-linker-histone-hist1h1e-and-literature-review
#12
Lara J Duffney, Purnima Valdez, Martine W Tremblay, Xinyu Cao, Sarah Montgomery, Allyn McConkie-Rosell, Yong-Hui Jiang
Genetic mutations in genes encoding proteins involved in epigenetic machinery have been reported in individuals with autism spectrum disorder (ASD), intellectual disability, congenital heart disease, and other disorders. H1 histone linker protein, the basic component in nucleosome packaging and chromatin organization, has not been implicated in human disease until recently. We report a de novo deleterious mutation of histone cluster 1 H1 family member e (HIST1H1E; c.435dupC; p.Thr146Hisfs*50), encoding H1 histone linker protein H1...
June 2018: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/29681176/-genetic-heterogeneity-and-complexity-of-congenital-heart-defects
#13
Dóra Nagy, Márta Széll
Congenital heart defects are the most common birth defects, they account for approximately one third of all cases. They are clinically heterogeneous, vary widely in severity, treatability and prognosis and may occur as part of multiple developmental disorders, such as chromosome aberrations, microdeletion syndromes and monogenic diseases, or as isolated defects. Syndromic forms account for 25-40%, isolated forms for 60-75% of all cases. With conventional cytogenetic and next-generation molecular genetic methods, numerous genetic alterations have been identified in evolutionarily highly conserved genes of transcriptional regulators, signaling molecules and structural proteins, which are critical to normal cardiogenesis, mostly in cases with syndromic congenital heart defects...
April 2018: Orvosi Hetilap
https://www.readbyqxmd.com/read/29663641/congenital-heart-diseases-and-cardiovascular-abnormalities-in-22q11-2-deletion-syndrome-from-well-established-knowledge-to-new-frontiers
#14
REVIEW
Marta Unolt, Paolo Versacci, Silvia Anaclerio, Caterina Lambiase, Giulio Calcagni, Matteo Trezzi, Adriano Carotti, Terrence Blaine Crowley, Elaine H Zackai, Elizabeth Goldmuntz, James William Gaynor, Maria Cristina Digilio, Donna M McDonald-McGinn, Bruno Marino
Congenital heart diseases (CHDs) and cardiovascular abnormalities are one of the pillars of clinical diagnosis of 22q11.2 deletion syndrome (22q11.2DS) and still represent the main cause of mortality in the affected children. In the past 30 years, much progress has been made in describing the anatomical patterns of CHD, in improving their diagnosis, medical treatment, and surgical procedures for these conditions, as well as in understanding the underlying genetic and developmental mechanisms. However, further studies are still needed to better determine the true prevalence of CHDs in 22q11...
April 16, 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29569399/identification-of-clinically-relevant-phenotypes-in-patients-with-ebstein-anomaly
#15
Rodrigo Cabrera, Marta Catalina Miranda-Fernández, Victor Manuel Huertas-Quiñones, Marisol Carreño, Ivonne Pineda, Carlos M Restrepo, Claudia Tamar Silva, Rossi Quero, Juan David Cano, Diana Carolina Manrique, Camila Camacho, Sebastián Tabares, Alberto García, Néstor Sandoval, Karen Julieth Moreno Medina, Rodolfo José Dennis Verano
BACKGROUND: Ebstein anomaly (EA) is a heterogeneous congenital heart defect (CHD), frequently accompanied by diverse cardiac and extracardiac comorbidities, resulting in a wide range of clinical outcomes. HYPOTHESIS: Phenotypic characterization of EA patients has the potential to identify variables that influence prognosis and subgroups with distinct contributing factors. METHODS: A comprehensive cross-sectional phenotypic characterization of 147 EA patients from one of the main referral institutions for CHD in Colombia was carried out...
March 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29555671/a-screening-approach-to-identify-clinically-actionable-variants-causing-congenital-heart-disease-in-exome-data
#16
Justin O Szot, Hartmut Cuny, Gillian M Blue, David T Humphreys, Eddie Ip, Katrina Harrison, Gary F Sholler, Eleni Giannoulatou, Paul Leo, Emma L Duncan, Duncan B Sparrow, Joshua W K Ho, Robert M Graham, Nicholas Pachter, Gavin Chapman, David S Winlaw, Sally L Dunwoodie
BACKGROUND: Congenital heart disease (CHD)-structural abnormalities of the heart that arise during embryonic development-is the most common inborn malformation, affecting ≤1% of the population. However, currently, only a minority of cases can be explained by genetic abnormalities. The goal of this study was to identify disease-causal genetic variants in 30 families affected by CHD. METHODS: Whole-exome sequencing was performed with the DNA of multiple family members...
March 2018: Circulation. Genomic and precision medicine
https://www.readbyqxmd.com/read/29543228/congenital-heart-disease-and-aortic-arch-variants-associated-with-mutation-in-phox2b
#17
Rachel C Lombardo, Aleksey Porollo, James F Cnota, Robert J Hopkin
PurposeCongenital central hypoventilation syndrome (CCHS, OMIM 209880) is a rare autosomal dominant disorder caused by mutation in PHOX2B that manifests as a consequence of abnormal neural crest cell migration during embryogenesis. Unlike other neurocristopathies, however, its impact on the cardiovascular system has not been previously assessed. This study was an effort to characterize the association between congenital heart disease (CHD) and mutations in PHOX2B in patients with CCHS.MethodsA retrospective review of patients with CCHS in conjunction with functional analysis of PHOX2B mutations associated with CHD was performed...
March 15, 2018: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29538527/genetic-syndromes-associated-with-congenital-cardiac-defects-and-ophthalmologic-changes-systematization-for-diagnosis-in-the-clinical-practice
#18
Priscila H A Oliveira, Beatriz S Souza, Eimi N Pacheco, Michele S Menegazzo, Ivan S Corrêa, Paulo R G Zen, Rafael F M Rosa, Claudia C Cesa, Lucia C Pellanda, Manuel A P Vilela
BACKGROUND: Numerous genetic syndromes associated with heart disease and ocular manifestations have been described. However, a compilation and a summarization of these syndromes for better consultation and comparison have not been performed yet. OBJECTIVE: The objective of this work is to systematize available evidence in the literature on different syndromes that may cause congenital heart diseases associated with ocular changes, focusing on the types of anatomical and functional changes...
January 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29532042/physiology-of-cardiac-development-from-genetics-to-signaling-to-therapeutic-strategies
#19
Cheng Sun, Maria I Kontaridis
The heart is one of the first organs to form and function during embryonic development. It is comprised of multiple cell lineages, each integral for proper cardiac development, and include cardiomyocytes, endothelial cells, epicardial cells and neural crest cells. The molecular mechanisms regulating cardiac development and morphogenesis are dependent on signaling crosstalk between multiple lineages through paracrine interactions, cell-ECM interactions, and cell-cell interactions, which together, help facilitate survival, growth, proliferation, differentiation and migration of cardiac tissue...
February 2018: Current Opinion in Physiology
https://www.readbyqxmd.com/read/29493583/anticipating-uncertainty-and-irrevocable-decisions-provider-perspectives-on-implementing-whole-genome-sequencing-in-critically-ill-children-with-heart-disease
#20
Danton S Char, Sandra Soo-Jin Lee, David Magnus, Mildred Cho
PurposeTo investigate the potential impacts of whole-genome sequencing (WGS) in the pediatric critical-care context, we examined how clinicians caring for critically ill children with congenital heart disease (CHD) anticipate and perceive the impact of WGS on their decision-making process and treatment recommendations.MethodsWe conducted semistructured in-person and telephone interviews of clinicians involved in the care of critically ill children with CHD at a high-volume pediatric heart center. We qualitatively analyzed the transcribed interviews...
March 1, 2018: Genetics in Medicine: Official Journal of the American College of Medical Genetics
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