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Congenital heart genetics

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https://www.readbyqxmd.com/read/27906824/selection-of-patients-for-initial-clinical-trials-of-solid-organ-xenotransplantation
#1
David K C Cooper, Martin Wijkstrom, Sundaram Hariharan, Joshua L Chan, Avneesh Singh, Keith Horvath, Muhammad Mohiuddin, Arielle Cimeno, Rolf N Barth, John C LaMattina, Richard N Pierson
Several groups have reported extended survival of genetically-engineered pig organs in nonhuman primates, varying from almost 10 months for life-supporting kidney grafts and >2 years for nonlife-supporting heart grafts to less than 1 month for life-supporting liver and lung grafts. We have attempted to define groups of patients who may not have an option to wait for an allograft. These include kidney, heart, and lung candidates who are highly-allosensitized. In addition, some kidney candidates (who have previously lost at least 2 allografts from rapid recurrence of native kidney disease) have a high risk of further recurrence and will not be offered a repeat allotransplant...
December 1, 2016: Transplantation
https://www.readbyqxmd.com/read/27904570/existence-of-mutations-in-the-homeodomain-encoding-region-of-nkx2-5-gene-in-iranian-patients-with-tetralogy-of-fallot
#2
Majid Kheirollahi, Fereshteh Khosravi, Saeideh Ashouri, Alireza Ahmadi
BACKGROUND: Tetralogy of Fallot (TOF), the most common cyanotic heart defect and one of the most common congenital heart diseases, occurs mostly sporadically and nonsyndromically. The underlying molecular genetic mechanism is not known. Therefore, the existence of mutations in the homeodomain-encoding region of NKX2.5 gene in Iranian patients with tetralogy of Fallot is evaluated. MATERIALS AND METHODS: In the present study, we analyzed the peripheral blood samples of27 patients in order to find any mutation in the 180 bp homeodomain-encoding region of NKX2...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27895974/genetic-screening-in-patients-with-craniofacial-malformations
#3
REVIEW
Amanda J Yoon, Binh N Pham, Katrina M Dipple
Craniofacial malformations include a variety of anomalies, including cleft lip with or without cleft palate, craniosynostosis, microtia, and hemifacial microsomia. All of these anomalies can be either isolated or part of a defined genetic syndrome. A clinical geneticist or genetic counselor should be a member of the craniofacial team to help determine which patients have isolated anomalies and which are likely to have a syndrome. They would then arrange for the appropriate genetic testing to confirm the diagnosis of the specific syndrome...
December 2016: Journal of Pediatric Genetics
https://www.readbyqxmd.com/read/27878339/multifocal-tenosynovial-giant-cell-tumors-in-a-child-with-noonan-syndrome
#4
Arthur B Meyers, Agboola O Awomolo, Sara Szabo
Noonan syndrome is a genetic disorder with variable expression of distinctive facial features, webbed neck, chest deformity, short stature, cryptorchidism and congenital heart disease. The association of Noonan syndrome and giant cell granulomas of the mandible is widely reported. However, Noonan syndrome may also be associated with single or multifocal tenosynovial giant cell tumors, also referred to as pigmented villonodular synovitis. We report a child with Noonan syndrome, giant cell granulomas of the mandible and synovial and tenosynovial giant cell tumors involving multiple joints and tendon sheaths who was initially misdiagnosed with juvenile idiopathic arthritis...
November 23, 2016: Pediatric Radiology
https://www.readbyqxmd.com/read/27875026/disseminated-bcg-pneumonitis-revealing-severe-combined-immunodeficiencyxs-in-charge-syndrome
#5
Hyung Young Kim, Yoo-Mi Kim, Hee Ju Park
CHARGE (coloboma, heart defect, atresia choanae, retarded growth and development, genital hypoplasia, and ear anomalies/deafness) syndrome is a rare genetic disorder caused by CHD7 mutation and is related to immunodeficiency. A 6-month-old girl with right lung agenesis, congenital heart defects, and ear anomalies developed repeated and serious respiratory infection for a short period. She was clinically diagnosed with typical CHARGE syndrome with severe combined immunodeficiency (T-, B+, NK-); however, CHD7 mutation was not detected...
November 22, 2016: Pediatric Pulmonology
https://www.readbyqxmd.com/read/27871331/association-of-dars-gene-polymorphisms-with-the-risk-of-isolated-ventricular-septal-defects-in-the-chinese-han-population
#6
Yu Feng, Runsen Chen, Xuming Mo
BACKGROUND: Ventricular septal defects (VSD) are the most common subtype of congenital heart defects (CHD) and are estimated to account for 20 to 30% of all cases of CHD. The etiology of isolated VSD remains poorly understood. Eight core aminoacyl-tRNA synthetases (ARSs) (EPRS, MARS, QARS, RARS, IARS, LARS, KARS, and DARS) combine with three nonenzymatic components to form a complex known as the multisynthetase complex (MSC). Four single nucleotide polymorphisms (SNPs) in EPRS have been reported to be associated with risks of CHD in Chinese populations...
November 21, 2016: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/27831548/a-novel-more-efficient-staged-approach-for-critical-congenital-heart-disease-screening
#7
J Mouledoux, S Guerra, J Ballweg, Y Li, W Walsh
OBJECTIVE: Screening for critical congenital heart disease (CCHD) using pulse oximetry has been endorsed by the American Academy of Pediatrics and the American Heart Association. The recommended screening requires two saturation readings. We sought to determine the incidence of undetected CCHD in Tennessee for the 2 years following implementation of an algorithm that assigned an immediate pass to a single lower extremity saturation of 97% or higher. STUDY DESIGN: State Genetic Screening records and reports of missed cases from the Tennessee Initiative for Perinatal Quality Care were used to determine if CCHD cases were missed by the new screening algorithm...
November 10, 2016: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/27831545/neuroimaging-findings-in-mowat-wilson-syndrome-a-study-of-54-patients
#8
Livia Garavelli, Ivan Ivanovski, Stefano Giuseppe Caraffi, Daniela Santodirocco, Marzia Pollazzon, Duccio Maria Cordelli, Ebtesam Abdalla, Patrizia Accorsi, Margaret P Adam, Chiara Baldo, Allan Bayat, Elga Belligni, Federico Bonvicini, Jeroen Breckpot, Bert Callewaert, Guido Cocchi, Goran Cuturilo, Koenraad Devriendt, Mary Beth Dinulos, Olivera Djuric, Roberta Epifanio, Francesca Faravelli, Debora Formisano, Lucio Giordano, Marina Grasso, Sabine Grønborg, Alessandro Iodice, Lorenzo Iughetti, Didier Lacombe, Massimo Maggi, Baris Malbora, Isabella Mammi, Sebastien Moutton, Rikke Møller, Petra Muschke, Manuela Napoli, Chiara Pantaleoni, Rosario Pascarella, Alessandro Pellicciari, Maria Luisa Poch-Olive, Federico Raviglione, Francesca Rivieri, Carmela Russo, Salvatore Savasta, Gioacchino Scarano, Angelo Selicorni, Margherita Silengo, Giovanni Sorge, Luigi Tarani, Luis Gonzaga Tone, Annick Toutain, Aurelien Trimouille, Elvis Terci Valera, Samantha Schrier Vergano, Nicoletta Zanotta, Marcella Zollino, William B Dobyns, Alex R Paciorkowski
PURPOSE: Mowat-Wilson syndrome (MWS) is a genetic disease characterized by distinctive facial features, moderate to severe intellectual disability, and congenital malformations, including Hirschsprung disease, genital and eye anomalies, and congenital heart defects, caused by haploinsufficiency of the ZEB2 gene. To date, no characteristic pattern of brain dysmorphology in MWS has been defined. METHODS: Through brain magnetic resonance imaging (MRI) analysis, we delineated a neuroimaging phenotype in 54 MWS patients with a proven ZEB2 defect, compared it with the features identified in a thorough review of published cases, and evaluated genotype-phenotype correlations...
November 10, 2016: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/27826129/genotypic-and-phenotypic-predictors-of-complete-heart-block-and-recovery-of-conduction-following-surgical-repair-of-congenital-heart-disease
#9
Laura Murray, Andrew H Smith, English C Flack, Kim Crum, Jill Owen, Prince J Kannankeril
BACKGROUND: Complete heart block (CHB) is a major complication after congenital heart surgery. We hypothesized that genetic and clinical factors are associated with the development of postoperative CHB and recovery of atrioventricular (AV) conduction. OBJECTIVE: To identify predictors of CHB and recovery following congenital heart surgery. METHODS: Patients undergoing congenital heart surgery at our institution from September 2007 through June 2015 were prospectively enrolled in a parent study of postoperative arrhythmias...
November 5, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27821535/copy-number-variation-as-a-genetic-basis-for-heterotaxy-and-heterotaxy-spectrum-congenital-heart-defects
#10
Jason R Cowan, Muhammad Tariq, Chad Shaw, Mitchell Rao, John W Belmont, Seema R Lalani, Teresa A Smolarek, Stephanie M Ware
Genomic disorders and rare copy number abnormalities are identified in 15-25% of patients with syndromic conditions, but their prevalence in individuals with isolated birth defects is less clear. A spectrum of congenital heart defects (CHDs) is seen in heterotaxy, a highly heritable and genetically heterogeneous multiple congenital anomaly syndrome resulting from failure to properly establish left-right (L-R) organ asymmetry during early embryonic development. To identify novel genetic causes of heterotaxy, we analysed copy number variants (CNVs) in 225 patients with heterotaxy and heterotaxy-spectrum CHDs using array-based genotyping methods...
December 19, 2016: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27816473/characterization-of-soluble-n-ethylmaleimide-sensitive-factor-attachment-protein-receptor-gene-stx18-variations-for-possible-roles-in-congenital-heart-diseases
#11
Xia Li, Shuai Shi, Fei-Feng Li, Rui Cheng, Ying Han, Li-Wei Diao, Qiong Zhang, Ji-Xin Zhi, Shu-Lin Liu
Congenital heart disease (CHD) is among the most prevalent and complex congenital anatomic malformations in newborns. Interactions of cardiac progenitor with a broad range of cellular regulatory factors play key roles in the formation of mammalian heart and pathogenesis of CHD. STX18 is a soluble N-ethylmaleimide-sensitive factor attachment protein receptor, which is involved in numeral cellular activities such as organelle assembly and the cell cycle. The aim of this work was to find evidence on whether STX18 variations might be associated with CHD in Chinese Han populations...
November 2, 2016: Gene
https://www.readbyqxmd.com/read/27807680/genetics-of-congenital-heart-disease-past-and-present
#12
REVIEW
Iolanda Muntean, Rodica Togănel, Theodora Benedek
Congenital heart disease is the most common congenital anomaly, representing an important cause of infant morbidity and mortality. Congenital heart disease represents a group of heart anomalies that include septal defects, valve defects, and outflow tract anomalies. The exact genetic, epigenetic, or environmental basis of congenital heart disease remains poorly understood, although the exact mechanism is likely multifactorial. However, the development of new technologies including copy number variants, single-nucleotide polymorphism, next-generation sequencing are accelerating the detection of genetic causes of heart anomalies...
November 2, 2016: Biochemical Genetics
https://www.readbyqxmd.com/read/27805241/congenital-heart-disease-and-down-syndrome-various-aspects-of-a-confirmed-association
#13
Sanaa Benhaourech, Abdenasser Drighil, Ayoub El Hammiri
BACKGROUND: Congenital heart disease (CHD) is frequently described in patients with Down syndrome (DS) and is the main cause of death in this population during the first two years of life. The spectrum of CHD patterns in DS varies widely worldwide; this variation could be due to sociodemographic, genetic and geographic factors. METHODS: A six-year retrospective, descriptive study was carried out from December 2008 to October 2014, based on the Paediatric Unit CHD registry of Ibn Rochd University Hospital...
September 2016: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/27803192/interchromosomal-core-duplicons-drive-both-evolutionary-instability-and-disease-susceptibility-of-the-chromosome-8p23-1-region
#14
Kiana Mohajeri, Stuart Cantsilieris, John Huddleston, Bradley J Nelson, Bradley P Coe, Catarina D Campbell, Carl Baker, Lana Harshman, Katherine M Munson, Zev N Kronenberg, Milinn Kremitzki, Archana Raja, Claudia Rita Catacchio, Tina A Graves, Richard K Wilson, Mario Ventura, Evan E Eichler
Recurrent rearrangements of Chromosome 8p23.1 are associated with congenital heart defects and developmental delay. The complexity of this region has led to inconsistencies in the current reference assembly, confounding studies of genetic variation. Using comparative sequence-based approaches, we generated a high-quality 6.3-Mbp alternate reference assembly of an inverted Chromosome 8p23.1 haplotype. Comparison with nonhuman primates reveals a 746-kbp duplicative transposition and two separate inversion events that arose in the last million years of human evolution...
November 2016: Genome Research
https://www.readbyqxmd.com/read/27799474/mirdnmr-a-gene-centered-database-of-background-de-novo-mutation-rates-in-human
#15
Yi Jiang, Zhongshan Li, Zhenwei Liu, Denghui Chen, Wanying Wu, Yaoqiang Du, Liying Ji, Zi-Bing Jin, Wei Li, Jinyu Wu
De novo germline mutations (DNMs) are the rarest genetic variants proven to cause a considerable number of sporadic genetic diseases, such as autism spectrum disorders, epileptic encephalopathy, schizophrenia, congenital heart disease, type 1 diabetes, and hearing loss. However, it is difficult to accurately assess the cause of DNMs and identify disease-causing genes from the considerable number of DNMs in probands. A common method to this problem is to identify genes that harbor significantly more DNMs than expected by chance, with accurate background DNM rate (DNMR) required...
October 30, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27799408/congenital-valvular-defects-associated-with-deleterious-mutations-in-the-pld1-gene
#16
Asaf Ta-Shma, Kai Zhang, Ekaterina Salimova, Alma Zernecke, Daniel Sieiro-Mosti, David Stegner, Milena Furtado, Avraham Shaag, Zeev Perles, Bernhard Nieswandt, Azaria J J T Rein, Nadia Rosenthal, Aaron M Neiman, Orly Elpeleg
BACKGROUND: The underlying molecular aetiology of congenital heart defects is largely unknown. The aim of this study was to explore the genetic basis of non-syndromic severe congenital valve malformations in two unrelated families. METHODS: Whole-exome analysis was used to identify the mutations in five patients who suffered from severe valvular malformations involving the pulmonic, tricuspid and mitral valves. The significance of the findings was assessed by studying sporulation of yeast carrying a homologous Phospholipase D (PLD1) mutation, in situ hybridisation in chick embryo and echocardiography and histological examination of hearts of PLD1 knockout mice...
October 31, 2016: Journal of Medical Genetics
https://www.readbyqxmd.com/read/27794172/clinical-aspects-of-prenatally-detected-congenital-heart-malformations-and-the-yield-of-chromosomal-microarray-analysis
#17
Rivka Sukenik-Halevy, Shay Sukenik, Arie Koifman, Yoav Alpert, Reli Hershkovitz, Alex Levi, Tal Biron-Shental
OBJECTIVE: The yield of chromosomal microarray analysis (CMA) for prenatally detected congenital heart defects (CHD) is 6.6-19.2%. We evaluated the yield of CMA in cases of prenatally detected CHD in regard to specific clinical characteristics. METHODS: Data from 192 cases of CHD including type, clinical and familial background, work-up performed during the pregnancy, and pregnancy outcomes were collected. RESULTS: Fetal echocardiography was performed in all cases...
October 28, 2016: Prenatal Diagnosis
https://www.readbyqxmd.com/read/27793968/ciliopathies
#18
Daniela A Braun, Friedhelm Hildebrandt
Nephronophthisis-related ciliopathies (NPHP-RC) are a group of inherited diseases that affect genes encoding proteins that localize to primary cilia or centrosomes. With few exceptions, ciliopathies are inherited in an autosomal recessive manner, and affected individuals manifest early during childhood or adolescence. NPHP-RC are genetically very heterogeneous, and, currently, mutations in more than 90 genes have been described as single-gene causes. The phenotypes of NPHP-RC are very diverse, and include cystic-fibrotic kidney disease, brain developmental defects, retinal degeneration, skeletal deformities, facial dimorphism, and, in some cases, laterality defects, and congenital heart disease...
October 28, 2016: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/27789736/impact-of-myh6-variants-in-hypoplastic-left-heart-syndrome
#19
Aoy Tomita-Mitchell, Karl D Stamm, Donna K Mahnke, Min-Su Kim, Pip M Hidestrand, Huan Ling Liang, Mary A Goetsch, Mats Hidestrand, Pippa Simpson, Andrew N Pelech, James S Tweddell, D Woodrow Benson, John W Lough, Michael E Mitchell
Hypoplastic left heart syndrome (HLHS) is a clinically and anatomically severe form of congenital heart disease (CHD). Although prior studies suggest that HLHS has a complex genetic inheritance, its etiology remains largely unknown. The goal of this study was to characterize a risk gene in HLHS and its effect on HLHS etiology and outcome. We performed next-generation sequencing on a multigenerational family with a high prevalence of CHD/HLHS, identifying a rare variant in the α-myosin heavy chain (MYH6) gene...
December 1, 2016: Physiological Genomics
https://www.readbyqxmd.com/read/27788187/genetic-variants-in-isolated-ebstein-anomaly-implicated-in-myocardial-development-pathways
#20
Robert J Sicko, Marilyn L Browne, Shannon L Rigler, Charlotte M Druschel, Gang Liu, Ruzong Fan, Paul A Romitti, Michele Caggana, Denise M Kay, Lawrence C Brody, James L Mills
Ebstein anomaly (EA) is a rare heart defect in which the tricuspid valve is malformed and displaced. The tricuspid valve abnormalities can lead to backflow of blood from the right ventricle to the right atrium, preventing proper circulation of blood to the lungs. Although the etiology of EA is largely unresolved, increased prevalence of EA in those with a family history of congenital heart disease suggests EA has a genetic component. Copy number variants (CNVs) are a major source of genetic variation and have been implicated in a range of congenital heart defect phenotypes...
2016: PloS One
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