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genetic causes of congenital heart disease

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https://www.readbyqxmd.com/read/29237533/-research-advances-in-the-mechanism-of-congenital-heart-disease-induced-by-pregestational-diabetes-mellitus
#1
Jie Wang, Feng Wang, Yong-Hao Gui
Congenital heart disease (CHD) is the most common birth defect at present and has a complex etiology which involves the combined effect of genetic and environmental factors. Pregestational diabetes mellitus is significantly associated with the development of CHD, but the detailed mechanism remains unknown. This article reviews the research advances in the molecular mechanism of CHD caused by pregestational diabetes mellitus.
December 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29228333/dnaaf1-links-heart-laterality-with-the-aaa-atpase-ruvbl1-and-ciliary-intraflagellar-transport
#2
Verity L Hartill, Glenn van de Hoek, Mitali P Patel, Rosie Little, Christopher M Watson, Ian R Berry, Amelia Shoemark, Dina Abdelmottaleb, Emma Parkes, Chiara Bacchelli, Katarzyna Szymanska, Nine V Knoers, Peter J Scambler, Marius Ueffing, Karsten Boldt, Robert Yates, Paul J Winyard, Beryl Adler, Eduardo Moya, Louise Hattingh, Anil Shenoy, Claire Hogg, Eamonn Sheridan, Ronald Roepman, Dominic Norris, Hannah M Mitchison, Rachel H Giles, Colin A Johnson
DNAAF1 (LRRC50) is a cytoplasmic protein required for dynein heavy chain assembly and cilia motility, and DNAAF1 mutations cause primary ciliary dyskinesia (PCD; MIM 613193). We describe four families with DNAAF1 mutations and complex congenital heart disease (CHD). In three families, all affected individuals have typical PCD phenotypes. However, an additional family demonstrates isolated CHD (heterotaxy) in two affected siblings, but no clinical evidence of PCD. We identified a homozygous DNAAF1 missense mutation, p...
December 7, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29191297/verification-of-heart-disease-implications-for-a-new-heart-transplantation-allocation-system
#3
Pejman Raeisi-Giglou, E Rene Rodriguez, Eugene H Blackstone, Carmela D Tan, Eileen M Hsich
OBJECTIVES: This study sought to determine the accuracy of the pre-transplantation clinical diagnosis of heart disease in the United Network for Organ Sharing (UNOS) database. BACKGROUND: Because survival on the heart transplantation waitlist depends on underlying heart disease, a new allocation system will include the type of heart disease. Accuracy of the pre-transplantation clinical diagnosis and the effect of misclassification are unknown. METHODS: We included all adults who received transplants at our center between January 2009 to December 2015...
December 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/29133208/homozygous-loss-of-function-brca1-variant-causing-a-fanconi-anemia-like-phenotype-a-clinical-report-and-review-of-previous-patients
#4
Bruna L Freire, Thais K Homma, Mariana F A Funari, Antônio M Lerario, Aline M Leal, Elvira D R P Velloso, Alexsandra C Malaquias, Alexander A L Jorge
BACKGROUND: Fanconi Anemia (FA) is a rare and heterogeneous genetic syndrome. It is associated with short stature, bone marrow failure, high predisposition to cancer, microcephaly and congenital malformation. Many genes have been associated with FA. Previously, two adult patients with biallelic pathogenic variant in Breast Cancer 1 gene (BRCA1) had been identified in Fanconi Anemia-like condition. CLINICAL REPORT: The proband was a 2.5 year-old girl with severe short stature, microcephaly, neurodevelopmental delay, congenital heart disease and dysmorphic features...
November 10, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29104469/mef2c-loss-of-function-mutation-contributes-to-congenital-heart-defects
#5
Xiao-Hui Qiao, Fei Wang, Xian-Ling Zhang, Ri-Tai Huang, Song Xue, Juan Wang, Xing-Biao Qiu, Xing-Yuan Liu, Yi-Qing Yang
Congenital heart disease (CHD) is the most common type of developmental abnormality in humans, and is a leading cause for substantially increased morbidity and mortality in affected individuals. Increasing studies demonstrates a pivotal role of genetic defects in the pathogenesis of CHD, and presently mutations in more than 60 genes have been associated with CHD. Nevertheless, CHD is of pronounced genetic heterogeneity, and the genetic basis underpinning CHD in a large proportion of patients remains unclear...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29100090/exome-wide-association-study-identifies-greb1l-mutations-in-congenital-kidney-malformations
#6
Simone Sanna-Cherchi, Kamal Khan, Rik Westland, Priya Krithivasan, Lorraine Fievet, Hila Milo Rasouly, Iuliana Ionita-Laza, Valentina P Capone, David A Fasel, Krzysztof Kiryluk, Sitharthan Kamalakaran, Monica Bodria, Edgar A Otto, Matthew G Sampson, Christopher E Gillies, Virginia Vega-Warner, Katarina Vukojevic, Igor Pediaditakis, Gabriel S Makar, Adele Mitrotti, Miguel Verbitsky, Jeremiah Martino, Qingxue Liu, Young-Ji Na, Vinicio Goj, Gianluigi Ardissino, Maddalena Gigante, Loreto Gesualdo, Magdalena Janezcko, Marcin Zaniew, Cathy Lee Mendelsohn, Shirlee Shril, Friedhelm Hildebrandt, Joanna A E van Wijk, Adela Arapovic, Marijan Saraga, Landino Allegri, Claudia Izzi, Francesco Scolari, Velibor Tasic, Gian Marco Ghiggeri, Anna Latos-Bielenska, Anna Materna-Kiryluk, Shrikant Mane, David B Goldstein, Richard P Lifton, Nicholas Katsanis, Erica E Davis, Ali G Gharavi
Renal agenesis and hypodysplasia (RHD) are major causes of pediatric chronic kidney disease and are highly genetically heterogeneous. We conducted whole-exome sequencing in 202 case subjects with RHD and identified diagnostic mutations in genes known to be associated with RHD in 7/202 case subjects. In an additional affected individual with RHD and a congenital heart defect, we found a homozygous loss-of-function (LOF) variant in SLIT3, recapitulating phenotypes reported with Slit3 inactivation in the mouse...
November 2, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29046480/epigenetic-mechanisms-underlying-maternal-diabetes-associated-risk-of-congenital-heart-disease
#7
Madhumita Basu, Jun-Yi Zhu, Stephanie LaHaye, Uddalak Majumdar, Kai Jiao, Zhe Han, Vidu Garg
Birth defects are the leading cause of infant mortality, and they are caused by a combination of genetic and environmental factors. Environmental risk factors may contribute to birth defects in genetically susceptible infants by altering critical molecular pathways during embryogenesis, but experimental evidence for gene-environment interactions is limited. Fetal hyperglycemia associated with maternal diabetes results in a 5-fold increased risk of congenital heart disease (CHD), but the molecular basis for this correlation is unknown...
October 19, 2017: JCI Insight
https://www.readbyqxmd.com/read/29040751/epidenovo-a-platform-for-linking-regulatory-de-novo-mutations-to-developmental-epigenetics-and-diseases
#8
Fengbiao Mao, Qi Liu, Xiaolu Zhao, Haonan Yang, Sen Guo, Luoyuan Xiao, Xianfeng Li, Huajing Teng, Zhongsheng Sun, Yali Dou
De novo mutations (DNMs) have been shown to be a major cause of severe early-onset genetic disorders such as autism spectrum disorder and intellectual disability. Over one million DNMs have been identified in developmental disorders by next generation sequencing, but linking these DNMs to the genes that they impact remains a challenge, as the majority of them are embedded in non-coding regions. As most developmental diseases occur in the early stages of development or during childhood, it is crucial to clarify the details of epigenetic regulation in early development in order to interpret the mechanisms underlying developmental disorders...
October 10, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29025208/an-atypical-case-of-noonan-syndrome-with-kras-mutation-diagnosed-by-targeted-exome-sequencing
#9
Jinsup Kim, Sung Yoon Cho, Aram Yang, Ja-Hyun Jang, Youngbin Choi, Ji-Eun Lee, Dong-Kyu Jin
Noonan syndrome (NS) is a genetic disorder caused by autosomal dominant inheritance and is characterized by a distinctive facial appearance, short stature, chest deformity, and congenital heart disease. In individuals with NS, germline mutations have been identified in several genes involved in the RAS/mitogen-activated protein kinase signal transduction pathway. Because of its clinical and genetic heterogeneity, the conventional diagnostic protocol with Sanger sequencing requires a multistep approach. Therefore, molecular genetic diagnosis using targeted exome sequencing (TES) is considered a less expensive and faster method, particularly for patients who do not fulfill the clinical diagnostic criteria of NS...
September 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29024827/left-ventricular-non-compaction-with-ebstein-anomaly-attributed-to-a-tpm1-mutation
#10
Aleksandra Nijak, Maaike Alaerts, Cuno Kuiperi, Anniek Corveleyn, Bert Suys, Bernard Paelinck, Johan Saenen, Emeline Van Craenenbroeck, Lut Van Laer, Bart Loeys, Aline Verstraeten
Left ventricular non-compaction (cardiomyopathy) (LVN(C)) is a rare hereditary cardiac condition, resulting from abnormal embryonic myocardial development. While it mostly occurs as an isolated condition, association with other cardiovascular manifestations such as Ebstein anomaly (EA) has been reported. This congenital heart defect is characterized by downward displacement of the tricuspid valve and leads to diminished ventricular size and function. In an autosomal dominant LVN(C) family consisting of five affected individuals, of which two also presented with EA and three with mitral valve insufficiency, we pursued the genetic disease cause using whole exome sequencing (WES)...
October 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29021403/heterozygous-mutations-affecting-the-protein-kinase-domain-of-cdk13-cause-a-syndromic-form-of-developmental-delay-and-intellectual-disability
#11
Mark J Hamilton, Richard C Caswell, Natalie Canham, Trevor Cole, Helen V Firth, Nicola Foulds, Ketil Heimdal, Emma Hobson, Gunnar Houge, Shelagh Joss, Dhavendra Kumar, Anne Katrin Lampe, Isabelle Maystadt, Victoria McKay, Kay Metcalfe, Ruth Newbury-Ecob, Soo-Mi Park, Leema Robert, Cecilie F Rustad, Emma Wakeling, Andrew O M Wilkie, The Deciphering Developmental Disorders Study, Stephen R F Twigg, Mohnish Suri
INTRODUCTION: Recent evidence has emerged linking mutations in CDK13 to syndromic congenital heart disease. We present here genetic and phenotypic data pertaining to 16 individuals with CDK13 mutations. METHODS: Patients were investigated by exome sequencing, having presented with developmental delay and additional features suggestive of a syndromic cause. RESULTS: Our cohort comprised 16 individuals aged 4-16 years. All had developmental delay, including six with autism spectrum disorder...
October 11, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28979898/a-novel-mutation-in-foxc1-in-a-lebanese-family-with-congenital-heart-disease-and-anterior-segment-dysgenesis-potential-roles-for-nfatc1-and-dpt-in-the-phenotypic-variations
#12
Athar Khalil, Christiane Al-Haddad, Hadla Hariri, Kamel Shibbani, Fadi Bitar, Mazen Kurban, Georges Nemer, Mariam Arabi
Congenital heart diseases (CHDs) are still the leading cause of death in neonates. Anterior segment dysgenesis is a broad clinical phenotype that affects the normal development of the eye, leading in most of the cases to glaucoma which is still a major cause of blindness for children and adolescents. Despite tremendous insights gained from genetic studies, a clear genotype-phenotype correlation is still difficult to draw. In Lebanon, a small country with still a high rate of consanguineous marriages, there are little data on the epidemiology of glaucoma amongst children with or without CHD...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28967605/-22q11-2%C3%A2-microdeletion-syndrome-analysis-of-the-care-pathway-before-the-genetic-diagnosis
#13
T Ingrao, L Lambert, M Valduga, G Bosser, E Albuisson, B Leheup
BACKGROUND: 22q11.2 deletion syndrome (22q11.2DS) is a very broad phenotypic spectrum disorder. It can affect many organs or systems. 22q11.2DS is the most common microdeletion syndrome in humans, with a prevalence ranging from one in every 2000 to one in 4000 newborns. It seems to be more prevalent than reported and under-recognized or undiagnosed because of its inherent clinical variability and heterogeneity. In France, 15,000 patients may be affected by this disease, more than half without knowing it...
November 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28945738/formation-of-a-tbx20-casz1-protein-complex-is-protective-against-dilated-cardiomyopathy-and-critical-for-cardiac-homeostasis
#14
Leslie Kennedy, Erin Kaltenbrun, Todd M Greco, Brenda Temple, Laura E Herring, Ileana M Cristea, Frank L Conlon
By the age of 40, one in five adults without symptoms of cardiovascular disease are at risk for developing congestive heart failure. Within this population, dilated cardiomyopathy (DCM) remains one of the leading causes of disease and death, with nearly half of cases genetically determined. Though genetic and high throughput sequencing-based approaches have identified sporadic and inherited mutations in a multitude of genes implicated in cardiomyopathy, how combinations of asymptomatic mutations lead to cardiac failure remains a mystery...
September 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28911943/heterozygous-deletion-of-akt1-rescues-cardiac-contractility-but-not-hypertrophy-in-a-mouse-model-of-noonan-syndrome-with-multiple-lentigines
#15
Rajika Roy, Maike Krenz
Noonan Syndrome with Multiple Lentigines (NSML) is associated with congenital heart disease in form of pulmonary valve stenosis and hypertrophic cardiomyopathy (HCM). Genetically, NSML is primarily caused by mutations in the non-receptor protein tyrosine phosphatase SHP2. Importantly, certain SHP2 mutations such as Q510E can cause a particularly severe form of HCM with heart failure in infancy. Due to lack of insight into the underlying pathomechanisms, an effective custom-tailored therapy to prevent heart failure in these patients has not yet been found...
November 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28899465/-clinical-features-and-myo5b-mutations-of-a-family-affected-by-microvillus-inclusion-disease
#16
Ying Cheng, Hong Liang, Na-Li Cai, Li Guo, Yu-Ge Huang, Yuan-Zong Song
Microvillus inclusion disease (MVID) is an autosomal recessive disorder caused by biallelic mutations in the MYO5B or STX3 gene. Refractory diarrhea and malabsorption are the main clinical manifestations. The aim of this study was to investigate the clinical features and MYO5B gene mutations of an infant with MVID. A 21-day-old female infant was referred to the hospital with the complaint of diarrhea for 20 days. On physical examination, growth retardation of the body weight and length was found along with moderately jaundiced skin and sclera...
September 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28878125/human-hepatic-organoids-for-the-analysis-of-human-genetic-diseases
#17
Yuan Guan, Dan Xu, Phillip M Garfin, Ursula Ehmer, Melissa Hurwitz, Greg Enns, Sara Michie, Manhong Wu, Ming Zheng, Toshihiko Nishimura, Julien Sage, Gary Peltz
We developed an in vitro model system where induced pluripotent stem cells (iPSCs) differentiate into 3-dimensional human hepatic organoids (HOs) through stages that resemble human liver during its embryonic development. The HOs consist of hepatocytes, and cholangiocytes, which are organized into epithelia that surround the lumina of bile duct-like structures. The organoids provide a potentially new model for liver regenerative processes, and were used to characterize the effect of different JAG1 mutations that cause: (a) Alagille syndrome (ALGS), a genetic disorder where NOTCH signaling pathway mutations impair bile duct formation, which has substantial variability in its associated clinical features; and (b) Tetralogy of Fallot (TOF), which is the most common form of a complex congenital heart disease, and is associated with several different heritable disorders...
September 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/28872494/the-genetics-of-congenital-heart-disease%C3%A2-understanding-and-improving-long-term-outcomes-in-congenital-heart-disease-a-review-for-the-general-cardiologist-and-primary-care-physician
#18
M Abigail Simmons, Martina Brueckner
PURPOSE OF REVIEW: This review has two purposes: to provide an updated review of the genetic causes of congenital heart disease (CHD) and the clinical implications of these genetic mutations, and to provide a clinical algorithm for clinicians considering a genetics evaluation of a CHD patient. RECENT FINDINGS: A large portion of congenital heart disease is thought to have a significant genetic contribution, and at this time a genetic cause can be identified in approximately 35% of patients...
October 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28803248/a-functional-assay-for-sick-sinus-syndrome-genetic-variants
#19
Chuanchau J Jou, Cammon B Arrington, Spencer Barnett, Jiaxiang Shen, Scott Cho, Xiaoming Sheng, Patrick C McCullagh, Neil E Bowles, Chase M Pribble, Elizabeth V Saarel, Thomas A Pilcher, Susan P Etheridge, Martin Tristani-Firouzi
BACKGROUND/AIMS: Congenital Sick Sinus Syndrome (SSS) is a disorder associated with sudden cardiac death due to severe bradycardia and prolonged pauses. Mutations in HCN4, the gene encoding inward Na+/K+ current (If), have been described as a cause of congenital SSS. The objective of this study is to develop an SSS model in embryonic zebrafish, and use zebrafish as a moderate-throughput assay to functionally characterize HCN4 variants. METHODS: To determine the function of hcn4 in zebrafish, embryos were either bathed in the If -specific blocker (ZD-7288), or endogenous hcn4 expression was knocked down using splice-blocking morpholinos...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28782493/big-data-and-genome-editing-technology-a-new-paradigm-of-cardiovascular-genomics
#20
Chayakrit Krittanawong, Tao Sun, Eyal Herzog
Cardiovascular diseases (CVDs) encompasse a range of conditions extending from congenital heart disease to acute coronary syndrome most of which are heterogenous in nature and some of them are multiple genetic loci. However, the pathogenesis of most CVDs remains incompletely understood. The advance in genome-editing technologies, an engineering process of DNA sequences at precise genomic locations, has enabled a new paradigm that human genome can be precisely modified to achieve a therapeutic effect. Genome-editing includes the correction of genetic variants that cause disease, the addition of therapeutic genes to specific sites in the genomic locations, and the removal of deleterious genes or genome sequences...
August 4, 2017: Current Cardiology Reviews
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