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Viswanathan S, Sandeep Oza P, Bellad A, Uttarilli A. Conotruncal Heart Defects: A Narrative Review of Molecular Genetics, Genomics Research and Innovation. OMICS : A JOURNAL OF INTEGRATIVE BIOLOGY 2024; 28:324-346. [PMID: 38986083 DOI: 10.1089/omi.2024.0097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
Congenital heart defects (CHDs) are most prevalent cardiac defects that occur at birth, leading to significant neonatal mortality and morbidity, especially in the developing nations. Among the CHDs, conotruncal heart defects (CTDs) are particularly noteworthy, comprising a significant portion of congenital cardiac anomalies. While advances in imaging and surgical techniques have improved the diagnosis, prognosis, and management of CTDs, their molecular genetics and genomic substrates remain incompletely understood. This expert review covers the recent advances from January 2016 onward and examines the complexities surrounding the genetic etiologies, prevalence, embryology, diagnosis, and clinical management of CTDs. We also emphasize the known copy number variants and single nucleotide variants associated with CTDs, along with the current planetary health research efforts aimed at CTDs in large cohort studies. In all, this comprehensive narrative review of molecular genetics and genomics research and innovation on CTDs draws from and highlights selected works from around the world and offers new ideas for advances in CTD diagnosis, precision medicine interventions, and accurate assessment of prognosis and recurrence risks.
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Affiliation(s)
- Sruthi Viswanathan
- Institute of Bioinformatics, Bengaluru, Bangalore, Karnataka, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Prachi Sandeep Oza
- Institute of Bioinformatics, Bengaluru, Bangalore, Karnataka, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Anikha Bellad
- Institute of Bioinformatics, Bengaluru, Bangalore, Karnataka, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Anusha Uttarilli
- Institute of Bioinformatics, Bengaluru, Bangalore, Karnataka, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
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Bassett AS, Reuter MS, Malecki S, Silversides C, Oechslin E. Clinically Relevant Genetic Considerations for Patients With Tetralogy of Fallot. CJC PEDIATRIC AND CONGENITAL HEART DISEASE 2023; 2:426-439. [PMID: 38161665 PMCID: PMC10755827 DOI: 10.1016/j.cjcpc.2023.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/05/2023] [Indexed: 01/03/2024]
Abstract
Genetic changes affect embryogenesis, cardiac and extracardiac phenotype, development, later onset conditions, and both short- and long-term outcomes and comorbidities in the increasing population of individuals with tetralogy of Fallot (TOF). In this review, we focus on current knowledge about clinically relevant genetics for patients with TOF across the lifespan. The latest findings for TOF genetics that are pertinent to day-to-day practice and lifelong management are highlighted: morbidity/mortality, cardiac/extracardiac features, including neurodevelopmental expression, and recent changes to prenatal screening and diagnostics. Genome-wide microarray is the first-line clinical genetic test for TOF across the lifespan, detecting relevant structural changes including the most common for TOF, the 22q11.2 microdeletion. Accumulating evidence illustrates opportunities for advances in understanding and care that may arise from genetic diagnosis at any age. We also glimpse into the near future when the multigenic nature of TOF will be more fully revealed, further enhancing possibilities for preventive care. Precision medicine is nigh.
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Affiliation(s)
- Anne S. Bassett
- The Dalglish Family 22q Clinic, University Health Network, Toronto, Ontario, Canada
- Clinical Genetics Research Program, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
- Toronto Adult Congenital Heart Disease Program, Division of Cardiology, Peter Munk Cardiac Centre, Department of Medicine, University Health Network, Toronto, Ontario, Canada
- Toronto General Hospital Research Institute, and Campbell Family Mental Health Research Institute, Toronto, Ontario, Canada
| | - Miriam S. Reuter
- The Dalglish Family 22q Clinic, University Health Network, Toronto, Ontario, Canada
- Clinical Genetics Research Program, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Sarah Malecki
- The Dalglish Family 22q Clinic, University Health Network, Toronto, Ontario, Canada
- Clinical Genetics Research Program, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Candice Silversides
- The Dalglish Family 22q Clinic, University Health Network, Toronto, Ontario, Canada
- Toronto Adult Congenital Heart Disease Program, Division of Cardiology, Peter Munk Cardiac Centre, Department of Medicine, University Health Network, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Erwin Oechslin
- The Dalglish Family 22q Clinic, University Health Network, Toronto, Ontario, Canada
- Toronto Adult Congenital Heart Disease Program, Division of Cardiology, Peter Munk Cardiac Centre, Department of Medicine, University Health Network, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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Liu WL, Li F, Chen W, Liu L, Cheng HJ, He ZX, Ai R. "Liu-Liang-Chung" syndrome with multiple congenital anomalies and the distinctive craniofacial features caused by dominant ZEB2 gene gain mutation. BMC Pediatr 2023; 23:480. [PMID: 37735378 PMCID: PMC10512491 DOI: 10.1186/s12887-023-04314-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 09/14/2023] [Indexed: 09/23/2023] Open
Abstract
BACKGROUND Contiguous gene gain syndrome including entire ZEB2 may be a novel syndrome. In the past, there were no easily distinct and recognizable features as a guide for precise clinical and genetic diagnosis of the syndrome. CASE PRESENTATION We report a novel case with the syndrome with a novel de novo 22.16 Mb duplication at 2q21.2-q24.1. The syndrome is characterized by multiple anomalies including the same typical craniofacial phenotype that is entirely different from Mowat-Wilson syndrome (MWS), and other quite similar features of MWS consisting of development delay, congenital heart disease, abdominal abnormalities, urogenital abnormalities, behavioral problems and so on, in which the distinctive craniofacial features can be more easily recognized. CONCLUSIONS Contiguous gene gain syndrome including entire ZEB2 characterized with similar multiple congenital anomalies of MWS and the distinctive craniofacial features is mainly caused by large 2q22 repeats including ZEB2 leading to dominant singe ZEB2 gene gain mutation, which is recommended to be named "Liu-Liang-Chung" syndrome. We diagnose this novel syndrome to distinguish it from MWS. Some variable additional features in the syndrome including remarkable growth and development retardation and protruding ears were recognized for the first time.
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Affiliation(s)
- Wei-Liang Liu
- Department of Pediatrics, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China.
| | - Fang Li
- Department of Ophthalmology, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Wei Chen
- Department of Ophthalmology, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Lu Liu
- Department of Ophthalmology, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Hai-Jian Cheng
- Beijing Kangso Medical Laboratory Co., Ltd, Beijing, 100195, China
| | - Zhi-Xu He
- Department of Pediatrics, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Rong Ai
- Department of Pediatrics, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
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Hyde NK, Dowty JG, Scovelle A, Armstrong G, Sutherland G, Olive L, Lycett K, O'Neil A. Association between maternal adversity, DNA methylation, and cardiovascular health of offspring: a longitudinal analysis of the ALSPAC cohort study. BMJ Open 2022; 12:e053652. [PMID: 35332037 PMCID: PMC8948393 DOI: 10.1136/bmjopen-2021-053652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Maternal adversity during pregnancy has been shown to be associated with some health outcomes in the offspring. This study investigated the association of maternal adversity during pregnancy and DNA methylation with offspring cardiovascular (CV) health. DESIGN Longitudinal observational cohort study SETTING: All pregnant residents in county Avon (∼0.9 million), UK, were eligible to participate if their estimated delivery date was between 1 April 1991 and 31 December 1992. PARTICIPANTS Mother-offspring pairs enrolled in the Avon Longitudinal Study of Parents and Children cohort at seven (n=7431) and 17 years of age (n=3143). PRIMARY AND SECONDARY OUTCOME MEASURES Offspring CV health primary measures were heart rate (HR), blood pressure (BP) and secondary measures were pulse-wave velocity and carotid intima-media thickness. RESULTS Overall, there was no association between maternal adversity scores (number or perceived impact) and primary CV measures (Perceived impact; HR: 0.999-fold change 95% CI 0.998 to 1.001; systolic BP (SBP): 1.000-fold change 95% CI 0.999 to 1.001; diastolic BP: 1.000-fold change 95% CI 0.999 to 1.002). Some small offspring sex effects were observed and there was also a small association between methylation of some CpG sites and offspring BP measures. CONCLUSIONS We found little evidence to support the overall association of maternal adversity during pregnancy and DNA methylation with offspring CV measures. Offspring sex-specific and age-specific associations require further investigation.
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Affiliation(s)
- Natalie K Hyde
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation,School of Medicine, Barwon Health, Geelong, VIC, Australia
| | - James G Dowty
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, Victoria, Australia
| | - Anna Scovelle
- Centre for Health Equity, Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria, Australia
| | - Gregory Armstrong
- Centre for Mental Health, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, Victoria, Australia
| | - Georgina Sutherland
- Centre for Mental Health, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, Victoria, Australia
| | - Lisa Olive
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation,School of Medicine, Barwon Health, Geelong, VIC, Australia
- School of Psychology, Deakin, Geelong, Victoria, Australia
| | - Kate Lycett
- School of Psychology, Deakin, Geelong, Victoria, Australia
- Community Child Health, Murdoch Childrens Research Institute, Parkville, Victoria, Australia
| | - Adrienne O'Neil
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation,School of Medicine, Barwon Health, Geelong, VIC, Australia
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Refaat K, Helmy N, Elawady M, El Ruby M, Kamel A, Mekkawy M, Ashaat E, Eid O, Mohamed A, Rady M. Interstitial Deletion of 2q22.2q22.3 Involving the Entire ZEB2 Gene in a Case of Mowat-Wilson Syndrome. Mol Syndromol 2021; 12:87-95. [PMID: 34012377 DOI: 10.1159/000513313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 11/23/2020] [Indexed: 01/09/2023] Open
Abstract
Mowat-Wilson syndrome (MWS) is a rare autosomal dominant syndrome characterized by dysmorphic features, mental retardation, and congenital heart disease (CHD). MWS results from microdeletions of chromosome 2q23 or de novo SNVs involving the ZEB2 gene. Here, we report on an Egyptian MWS patient diagnosed by chromosomal microarray (CMA). A 1-year-old male child was referred to the CHD clinic, National Research Centre, presenting with dysmorphic features and CHD. The patient was referred to the human cytogenetics department for cytogenetic analysis and for screening of subtelomere rearrangements and microdeletion loci, using MLPA, and all revealed normal results. CMA revealed an interstitial 2.27-Mb microdeletion in chromosome 2q, involving the entire ZEB2 gene and other genes. This study emphasizes the significance of CMA in the detection of microdeletions/microduplications and as a screening tool in cases presenting with CHD and extracardiac manifestations. MWS should be suspected in patients presenting with the characteristic facial dysmorphism, developmental delay, seizures, Hirschsprung disease, and congenital heart anomalies, especially those involving the pulmonary arteries or pulmonary valves. It is recommended to include the ZEB2 locus in the MLPA microdeletions probes.
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Affiliation(s)
- Khaled Refaat
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Nivine Helmy
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Mohamed Elawady
- Department of Community Medicine and Public Health, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mona El Ruby
- Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Alaa Kamel
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Mona Mekkawy
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Engy Ashaat
- Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Ola Eid
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Amal Mohamed
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Mervat Rady
- Department of Community Medicine and Public Health, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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Gene-based genome-wide association studies and meta-analyses of conotruncal heart defects. PLoS One 2019; 14:e0219926. [PMID: 31314787 PMCID: PMC6636758 DOI: 10.1371/journal.pone.0219926] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 07/02/2019] [Indexed: 12/28/2022] Open
Abstract
Conotruncal heart defects (CTDs) are among the most common and severe groups of congenital heart defects. Despite evidence of an inherited genetic contribution to CTDs, little is known about the specific genes that contribute to the development of CTDs. We performed gene-based genome-wide analyses using microarray-genotyped and imputed common and rare variants data from two large studies of CTDs in the United States. We performed two case-parent trio analyses (N = 640 and 317 trios), using an extension of the family-based multi-marker association test, and two case-control analyses (N = 482 and 406 patients and comparable numbers of controls), using a sequence kernel association test. We also undertook two meta-analyses to combine the results from the analyses that used the same approach (i.e. family-based or case-control). To our knowledge, these analyses are the first reported gene-based, genome-wide association studies of CTDs. Based on our findings, we propose eight CTD candidate genes (ARF5, EIF4E, KPNA1, MAP4K3, MBNL1, NCAPG, NDFUS1 and PSMG3). Four of these genes (ARF5, KPNA1, NDUFS1 and PSMG3) have not been previously associated with normal or abnormal heart development. In addition, our analyses provide additional evidence that genes involved in chromatin-modification and in ribonucleic acid splicing are associated with congenital heart defects.
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Zeng X, Hunt A, Jin SC, Duran D, Gaillard J, Kahle KT. EphrinB2-EphB4-RASA1 Signaling in Human Cerebrovascular Development and Disease. Trends Mol Med 2019; 25:265-286. [PMID: 30819650 DOI: 10.1016/j.molmed.2019.01.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/17/2019] [Accepted: 01/29/2019] [Indexed: 12/13/2022]
Abstract
Recent whole exome sequencing studies in humans have provided novel insight into the importance of the ephrinB2-EphB4-RASA1 signaling axis in cerebrovascular development, corroborating and extending previous work in model systems. Here, we aim to review the human cerebrovascular phenotypes associated with ephrinB2-EphB4-RASA1 mutations, including those recently discovered in Vein of Galen malformation: the most common and severe brain arteriovenous malformation in neonates. We will also discuss emerging paradigms of the molecular and cellular pathophysiology of disease-causing ephrinB2-EphB4-RASA1 mutations, including the potential role of somatic mosaicism. These observations have potential diagnostic and therapeutic implications for patients with rare congenital cerebrovascular diseases and their families.
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Affiliation(s)
- Xue Zeng
- Department of Genetics, Yale School of Medicine, New Haven CT, USA; Laboratory of Human Genetics and Genomics, The Rockefeller University, New York, NY, USA
| | - Ava Hunt
- Department of Neurosurgery, Yale School of Medicine, New Haven CT, USA
| | - Sheng Chih Jin
- Laboratory of Human Genetics and Genomics, The Rockefeller University, New York, NY, USA
| | - Daniel Duran
- Department of Neurosurgery, Yale School of Medicine, New Haven CT, USA
| | - Jonathan Gaillard
- Department of Neurosurgery, Yale School of Medicine, New Haven CT, USA
| | - Kristopher T Kahle
- Department of Neurosurgery, Yale School of Medicine, New Haven CT, USA; Department of Pediatrics, Yale School of Medicine, New Haven CT, USA; Department of Cellular and Molecular Physiology, Yale School of Medicine, New Haven CT, USA.
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Waespe N, Dhanraj S, Wahala M, Tsangaris E, Enbar T, Zlateska B, Li H, Klaassen RJ, Fernandez CV, Cuvelier GDE, Wu JK, Pastore YD, Silva M, Lipton JH, Brossard J, Michon B, Abish S, Steele M, Sinha R, Belletrutti MJ, Breakey VR, Jardine L, Goodyear L, Kofler L, Cada M, Sung L, Shago M, Scherer SW, Dror Y. The clinical impact of copy number variants in inherited bone marrow failure syndromes. NPJ Genom Med 2017; 2. [PMID: 28690869 PMCID: PMC5498150 DOI: 10.1038/s41525-017-0019-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Inherited bone marrow failure syndromes comprise a genetically heterogeneous group of diseases with hematopoietic failure and a wide array of physical malformations. Copy number variants were reported in some inherited bone marrow failure syndromes. It is unclear what impact copy number variants play in patients evaluated for a suspected diagnosis of inherited bone marrow failure syndromes. Clinical and genetic data of 323 patients from the Canadian Inherited Marrow Failure Registry from 2001 to 2014, who had a documented genetic work-up, were analyzed. Cases with pathogenic copy number variants (at least 1 kilobasepairs) were compared to cases with other mutations. Genotype-phenotype correlations were performed to assess the impact of copy number variants. Pathogenic nucleotide-level mutations were found in 157 of 303 tested patients (51.8%). Genome-wide copy number variant analysis by single-nucleotide polymorphism arrays or comparative genomic hybridization arrays revealed pathogenic copy number variants in 11 of 67 patients tested (16.4%). In four of these patients, identification of copy number variant was crucial for establishing the correct diagnosis as their clinical presentation was ambiguous. Eight additional patients were identified to harbor pathogenic copy number variants by other methods. Of the 19 patients with pathogenic copy number variants, four had compound-heterozygosity of a copy number variant with a nucleotide-level mutation. Pathogenic copy number variants were associated with more extensive non-hematological organ system involvement (p = 0.0006), developmental delay (p = 0.006) and short stature (p = 0.04) compared to nucleotide-level mutations. In conclusion, a significant proportion of patients with inherited bone marrow failure syndromes harbor pathogenic copy number variants which were associated with a more extensive non-hematological phenotype in this cohort. Patients with a phenotype suggestive of inherited bone marrow failure syndromes but without identification of pathogenic nucleotide-level mutations should undergo specific testing for copy number variants. Copy number variation in patients with inherited bone marrow failure syndromes (IBMFSs) is associated with more severe clinical symptoms. In addition to persistently low levels of red blood cells, white blood cells and/ or platelets, patients with IBMFSs also present varying degrees of physical malformations. Most cases are associated with single base-pair mutations in the DNA sequence, but Canadian researchers led by Yigal Dror at The Hospital for Sick Children in Toronto, have found that whole sections of the genome are deleted or repeated in an important proportion of patients. Those carrying copy number variants (CNV) presented more commonly with developmental delay, short stature and defects in more organ systems, than patients with point mutations. CNV analysis of patients with suspected IBMFSs could aid early disease evaluation and management.
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Affiliation(s)
- Nicolas Waespe
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada.,Marrow Failure and Myelodysplasia Program, Division of Hematology/Oncology, Department of Pediatrics, The Hospital for Sick Children, Toronto, ON, Canada
| | - Santhosh Dhanraj
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - Manju Wahala
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Elena Tsangaris
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Tom Enbar
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Bozana Zlateska
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - Hongbing Li
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Robert J Klaassen
- Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | | | - Geoff D E Cuvelier
- Pediatric Hematology/Oncology, University of Manitoba, CancerCare Manitoba, Winnipeg, MB, Canada
| | - John K Wu
- Division of Hematology/Oncology, UBC & B.C. Children's Hospital, Vancouver, BC, Canada
| | | | | | - Jeffrey H Lipton
- Allogeneic Blood and Marrow Transplant Program, Princess Margaret Cancer Centre, University of Toronto, Toronto, ON, Canada
| | - Joseé Brossard
- Centre Hospitalier Universitaire, Sherbrooke, QC, Canada
| | - Bruno Michon
- Centre Hospitalier Universitaire, Québec, QC, Canada
| | - Sharon Abish
- Pediatric Hematology Oncology, Montreal Children's Hospital, Montreal, QC, Canada
| | | | - Roona Sinha
- Royal University Hospital, Saskatoon, SK, Canada
| | | | - Vicky R Breakey
- Department of Pediatrics, McMaster University, Hamilton, ON, Canada
| | - Lawrence Jardine
- Children's Hospital, London Health Sciences Centre, London, ON, Canada
| | - Lisa Goodyear
- Pediatric Hematology/Oncology, Janeway Child Health Centre, St. John's, NF, Canada
| | - Liat Kofler
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Michaela Cada
- Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - Lillian Sung
- Population Health Sciences, Research Institute, Division of Hematology/Oncology, Department of Pediatrics, The Hospital for Sick Children, Toronto, ON, Canada
| | - Mary Shago
- Cytogenetics Laboratory, Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada
| | - Stephen W Scherer
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Yigal Dror
- Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON, Canada.,Marrow Failure and Myelodysplasia Program, Division of Hematology/Oncology, Department of Pediatrics, The Hospital for Sick Children, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
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Baxter AL, Vivian JL, Hagelstrom RT, Hossain W, Golden WL, Wassman ER, Vanzo RJ, Butler MG. A Novel Partial Duplication of ZEB2 and Review of ZEB2 Involvement in Mowat-Wilson Syndrome. Mol Syndromol 2017; 8:211-218. [PMID: 28690488 DOI: 10.1159/000473693] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2017] [Indexed: 12/14/2022] Open
Abstract
Mowat-Wilson syndrome is a rare genetic condition characterized by intellectual disability, structural anomalies, and dysmorphic features. It is caused by haploinsufficiency of the ZEB2 gene in chromosome 2q22.3. Over 180 distinct mutations in ZEB2 have been reported, including nonsense and missense point mutations, deletions, and large chromosomal rearrangements. We report on a 14-year-old female with a clinical diagnosis of Mowat-Wilson syndrome. Chromosomal microarray identified a novel de novo 69-kb duplication containing exons 1 and 2 of the ZEB2 gene. Sequence analysis identified no other variants in this gene. This is the first report of a partial duplication of the ZEB2 gene resulting in Mowat-Wilson syndrome.
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Affiliation(s)
| | | | - R Tanner Hagelstrom
- Department of Human Genetics Laboratory, University of Nebraska Medical Center, Omaha, NE, USA
| | - Waheeda Hossain
- Department of Psychiatry and Behavioral Sciences and Pediatrics, University of Kansas Medical Center, Kansas City, KS
| | | | | | | | - Merlin G Butler
- Department of Psychiatry and Behavioral Sciences and Pediatrics, University of Kansas Medical Center, Kansas City, KS
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