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genetic causes of congenital heart disease

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https://www.readbyqxmd.com/read/28062416/blood-flow-patterns-underlie-developmental-heart-defects
#1
Madeline Midgett, Kent L Thornburg, Sandra Rugonyi
Although cardiac malformations at birth are typically associated with genetic anomalies, blood flow dynamics also play a crucial role in heart formation. However, the relationship between blood flow patterns in the early embryo and later cardiovascular malformation has not been determined. We used the chicken embryo model to quantify the extent to which anomalous blood flow patterns predict cardiac defects that resemble those in humans, and found that restricting either the inflow to the heart or the outflow led to reproducible abnormalities with a dose-response type relationship between blood flow stimuli and the expression of cardiac phenotypes...
January 6, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28035386/microduplication-of-7q36-3-encompassing-the-shh-long%C3%A2-range-regulator-zrs-in-a-patient-with-triphalangeal-thumb%C3%A2-polysyndactyly-syndrome-and-congenital-heart-disease
#2
Zhenghua Liu, Ni Yin, Lianghui Gong, Zhiping Tan, Bangliang Yin, Yifeng Yang, Cheng Luo
Triphalangeal thumb‑polysyndactyly syndrome (TPT‑PS) is an autosomal dominant disorder with complete penetrance and a variable expression consisting of opposable triphalangeal thumbs, duplication of the distal thumb phalanx, pre‑axial polydactyly and duplication of the big toes (hallux). The causative gene of TPT‑PS has been mapped to 7q36.3. Sonic hedgehog (SHH) expressed in the zone of polarizing activity (ZPA) has an important role in defining the anterior‑posterior axis and numbers of digits in limb bud development...
February 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28018021/exome-sequencing-identifies-compound-heterozygous-mutations-in-scn5a-associated-with-congenital-complete-heart-block-in-the-thai-population
#3
Chuphong Thongnak, Pornprot Limprasert, Duangkamol Tangviriyapaiboon, Suchaya Silvilairat, Apichaya Puangpetch, Ekawat Pasomsub, Chonlaphat Sukasem, Wasun Chantratita
Background. Congenital heart block is characterized by blockage of electrical impulses from the atrioventricular node (AV node) to the ventricles. This blockage can be caused by ion channel impairment that is the result of genetic variation. This study aimed to investigate the possible causative variants in a Thai family with complete heart block by using whole exome sequencing. Methods. Genomic DNA was collected from a family consisting of five family members in three generations in which one of three children in generation III had complete heart block...
2016: Disease Markers
https://www.readbyqxmd.com/read/27984612/-molecular-cytogenetic-analysis-of-a-case-with-ring-chromosome-3-syndrome
#4
Kaihui Zhang, Fengling Song, Dongdong Zhang, Haiyan Zhang, Ying Wang, Rui Dong, Yufeng Zhang, Yi Liu, Zhongtao Gai
OBJECTIVE: To investigate the genetic cause for a child with developmental delay and congenital heart disease through molecular cytogenetic analysis. METHODS: G-banded karyotyping and chromosomal microarray analysis (CMA) were performed for the patient and his parents. RESULTS: The proband's karyotype was detected as ring chromosome 3, and a 3q26.3-25.3 deletion encompassing 45 genes has been found with CMA. Testing of both parents was normal...
December 10, 2016: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/27942761/hand1-loss-of-function-mutation-causes-tetralogy-of-fallot
#5
Juan Wang, Xiao-Qing Hu, Yu-Han Guo, Jian-Yun Gu, Jia-Hong Xu, Yan-Jie Li, Ning Li, Xiao-Xiao Yang, Yi-Qing Yang
As the most prevalent form of birth defect in humans worldwide, congenital heart disease (CHD) is responsible for substantial morbidity and is still the leading cause of birth defect-related demises. Increasing evidence demonstrates that genetic defects play an important role in the pathogenesis of CHD, and mutations in multiple genes, especially in those coding for cardiac core transcription factors, have been causally linked to various CHDs. Nevertheless, CHD is a genetically heterogeneous disease and the genetic determinants underpinning CHD in an overwhelming majority of patients remain elusive...
December 10, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27938597/-diagnosis-of-a-case-with-williams-beuren-syndrome-with-nephrocalcinosis-using-chromosome-microarray-analysis
#6
S J Jin, M Liu, W J Long, X P Luo
Objective: To explore the clinical phenotypes and the genetic cause for a boy with unexplained growth retardation, nephrocalcinosis, auditory anomalies and multi-organ/system developmental disorders. Method: Routine G-banding and chromosome microarray analysis were applied to a child with unexplained growth retardation, nephrocalcinosis, auditory anomalies and multi-organ/system developmental disorders treated in the Department of Pediatrics of Tongji Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology in September 2015 and his parents to conduct the chromosomal karyotype analysis and the whole genome scanning...
December 2, 2016: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/27831545/neuroimaging-findings-in-mowat-wilson-syndrome-a-study-of-54-patients
#7
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/27807680/genetics-of-congenital-heart-disease-past-and-present
#8
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
#9
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/27799474/mirdnmr-a-gene-centered-database-of-background-de-novo-mutation-rates-in-human
#10
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...
January 4, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/27793968/ciliopathies
#11
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/27770446/the-role-of-genetics-in-pulmonary-arterial-hypertension
#12
REVIEW
Lijiang Ma, Wendy K Chung
Group 1 pulmonary hypertension or pulmonary arterial hypertension (PAH) is a rare disease characterized by proliferation and occlusion of small pulmonary arterioles, leading to progressive elevation of pulmonary artery pressure and pulmonary vascular resistance, and right ventricular failure. Historically, it has been associated with a high mortality rate, although, over the last decade, treatment has improved survival. PAH includes idiopathic PAH (IPAH), heritable PAH (HPAH), and PAH associated with certain medical conditions...
January 2017: Journal of Pathology
https://www.readbyqxmd.com/read/27685952/a-population-based-analysis-of-mortality-in-patients-with-turner-syndrome-and-hypoplastic-left-heart-syndrome-using-the-texas-birth-defects-registry
#13
Diego A Lara, Mary K Ethen, Mark A Canfield, Wendy N Nembhard, Shaine A Morris
BACKGROUND: Hypoplastic left heart syndrome (HLHS) is strongly associated with Turner syndrome (TS); outcome data when these conditions coexist is sparse. We aimed to investigate long-term survival and causes of death in this population. METHODS: The Texas Birth Defects Registry was queried for all live born infants with HLHS during 1999-2007. We used Kaplan-Meier and Cox regression analyses to compare survival among patients with HLHS with TS (HLHS/TS+) to patients who had HLHS without genetic disorders or extracardiac birth defects (HLHS/TS-)...
September 29, 2016: Congenital Heart Disease
https://www.readbyqxmd.com/read/27672144/enhancing-literacy-in-cardiovascular-genetics-a-scientific-statement-from-the-american-heart-association
#14
Seema Mital, Kiran Musunuru, Vidu Garg, Mark W Russell, David E Lanfear, Rajat M Gupta, Kathleen T Hickey, Michael J Ackerman, Marco V Perez, Dan M Roden, Daniel Woo, Caroline S Fox, Stephanie Ware
Advances in genomics are enhancing our understanding of the genetic basis of cardiovascular diseases, both congenital and acquired, and stroke. These advances include finding genes that cause or increase the risk for childhood and adult-onset diseases, finding genes that influence how patients respond to medications, and the development of genetics-guided therapies for diseases. However, the ability of cardiovascular and stroke clinicians to fully understand and apply this knowledge to the care of their patients has lagged...
October 2016: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/27659091/trauma-due-to-self-aggression-in-patient-with-waardenburg-syndrome-associated-with-congenital-anomalies
#15
Sara Nader Marta, Roberto Yoshio Kawakami, Claudia Almeida Prado Piccino Sgavioli, Ana Eliza Correa, Guaniara D'Árk de Oliveira El Kadre, Ricardo Sandri Carvalho
Waardenburg syndrome (WS) is an inherited autosomal dominant genetic disorder presenting variable penetrance and expressivity, with an estimated prevalence of 1:42,000. Clinical characteristics of WS include lateral displacement of the internal eye canthus, hyperplasia of the medial portion of the eyebrows, prominent and broad nasal base, congenital deafness, pigmentation of the iris and skin, and white forelock. A 24-year-old male patient, previously diagnosed with WS, was referred to the Special Needs Dental Clinic of Sacred Heart University, Bauru, Brazil...
August 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27616478/bi-allelic-mutations-in-pkd1l1-are-associated-with-laterality-defects-in-humans
#16
Francesco Vetrini, Lisa C A D'Alessandro, Zeynep C Akdemir, Alicia Braxton, Mahshid S Azamian, Mohammad K Eldomery, Kathryn Miller, Chelsea Kois, Virginia Sack, Natasha Shur, Asha Rijhsinghani, Jignesh Chandarana, Yan Ding, Judy Holtzman, Shalini N Jhangiani, Donna M Muzny, Richard A Gibbs, Christine M Eng, Neil A Hanchard, Tamar Harel, Jill A Rosenfeld, John W Belmont, James R Lupski, Yaping Yang
Disruption of the establishment of left-right (L-R) asymmetry leads to situs anomalies ranging from situs inversus totalis (SIT) to situs ambiguus (heterotaxy). The genetic causes of laterality defects in humans are highly heterogeneous. Via whole-exome sequencing (WES), we identified homozygous mutations in PKD1L1 from three affected individuals in two unrelated families. PKD1L1 encodes a polycystin-1-like protein and its loss of function is known to cause laterality defects in mouse and medaka fish models...
October 6, 2016: American Journal of Human Genetics
https://www.readbyqxmd.com/read/27593162/congenital-heart-disease-genetics-uncovers-context-dependent-organization-and-function-of-nucleoporins-at-cilia
#17
Florencia Del Viso, Fang Huang, Jordan Myers, Madeleine Chalfant, Yongdeng Zhang, Nooreen Reza, Joerg Bewersdorf, C Patrick Lusk, Mustafa K Khokha
Human genomics is identifying candidate genes for congenital heart disease (CHD), but discovering the underlying mechanisms remains challenging. In a patient with CHD and heterotaxy (Htx), a disorder of left-right patterning, we previously identified a duplication in Nup188. However, a mechanism to explain how a component of the nuclear pore complex (NPC) could cause Htx/CHD was undefined. Here, we show that knockdown of Nup188 or its binding partner Nup93 leads to a loss of cilia during embryonic development while leaving NPC function largely intact...
September 12, 2016: Developmental Cell
https://www.readbyqxmd.com/read/27583373/genetics-of-bicuspid-aortic-valve-aortopathy
#18
Maria G Andreassi, Alessandro Della Corte
PURPOSE OF REVIEW: The incidence of aortic dilation and acute complications (rupture and dissection) is higher in patients with a bicuspid aortic valve (BAV), the most frequent congenital heart defect.The present review focuses on the current knowledge in the genetics of BAV, emphasizing the clinical implications for early detection and personalized care. RECENT FINDINGS: BAV is a highly heritable trait, but the genetic causes remain largely elusive. NOTCH1 is the only proven candidate gene to be associated with both familial and sporadic BAV...
November 2016: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/27561770/left-ventricular-noncompaction-a-distinct-genetic-cardiomyopathy
#19
REVIEW
Eloisa Arbustini, Valentina Favalli, Nupoor Narula, Alessandra Serio, Maurizia Grasso
Left ventricular noncompaction (LVNC) describes a ventricular wall anatomy characterized by prominent left ventricular (LV) trabeculae, a thin compacted layer, and deep intertrabecular recesses. Individual variability is extreme, and trabeculae represent a sort of individual "cardioprinting." By itself, the diagnosis of LVNC does not coincide with that of a "cardiomyopathy" because it can be observed in healthy subjects with normal LV size and function, and it can be acquired and is reversible. Rarely, LVNC is intrinsically part of a cardiomyopathy; the paradigmatic examples are infantile tafazzinopathies...
August 30, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27555292/transgenerational-cardiology-one-way-to-a-baby-s-heart-is-through-the-mother
#20
Patrick Y Jay, Ehiole Akhirome, Rachel A Magnan, M Rebecca Zhang, Lillian Kang, Yidan Qin, Nelson Ugwu, Suk Dev Regmi, Julie M Nogee, James M Cheverud
Despite decades of progress, congenital heart disease remains a major cause of mortality and suffering in children and young adults. Prevention would be ideal, but formidable biological and technical hurdles face any intervention that seeks to target the main causes, genetic mutations in the embryo. Other factors, however, significantly modify the total risk in individuals who carry mutations. Investigation of these factors could lead to an alternative approach to prevention. To define the risk modifiers, our group has taken an "experimental epidemiologic" approach via inbred mouse strain crosses...
November 5, 2016: Molecular and Cellular Endocrinology
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