1
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Hauptman AJ, Salpekar JA, Cohen JS, Asato MR. Navigating Neurogenetics for Child and Adolescent Psychiatry Practice. J Am Acad Child Adolesc Psychiatry 2024; 63:666-669. [PMID: 38325519 DOI: 10.1016/j.jaac.2023.09.555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/29/2023] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
Neurodevelopmental disorders (NDDs) are a group of conditions characterized by impairments of brain processes that impact cognition, communication, motor abilities, and/or behavior during development. These conditions typically have significant effects across the life span and impact personal, social, academic, or occupational functioning. The US Centers for Disease Control and report that 1 in 6 children has a developmental disability, making it highly likely for child and adolescent psychiatrists to encounter children with NDDs in daily practice.1 While the etiologies of NDDs are broad, genetic syndromes are a common cause of NDDs. The diagnostic yield of thorough genetic testing for NDDs as a group is about 40% based on meta-analysis, including 30% to 50% yield in patients with global developmental delay (GDD) or intellectual disability (ID) and 15% to 20% yield in patients with in autism spectrum disorder.1-3 The findings are extremely heterogeneous, including chromosomal copy number variants (CNVs) and more than 2,000 known monogenic disorders associated with NDDs.3 Diagnostic yields will increase over time with advances in technology and disease gene discovery.3.
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Affiliation(s)
- Aaron J Hauptman
- Kennedy Krieger Institute, Baltimore, Maryland, and Johns Hopkins University School of Medicine, Baltimore, Maryland.
| | - Jay A Salpekar
- Kennedy Krieger Institute, Baltimore, Maryland, and Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Julie S Cohen
- Kennedy Krieger Institute, Baltimore, Maryland, and Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Miya R Asato
- Kennedy Krieger Institute, Baltimore, Maryland, and Johns Hopkins University School of Medicine, Baltimore, Maryland
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2
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Dillen L, Fatima N, Hommersom MP, Çepni E, Fatima F, van Beusekom E, Albert S, van Hagen JM, de Vries BBA, Khan AA, de Brouwer APM, van Bokhoven H. Generation of induced pluripotent stem cell lines from two unrelated patients affected by intellectual disability carrying homozygous variants in SGIP1. Stem Cell Res 2024; 77:103442. [PMID: 38739972 DOI: 10.1016/j.scr.2024.103442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 05/08/2024] [Indexed: 05/16/2024] Open
Abstract
Intellectual disability (ID) is a diverse neurodevelopmental condition and almost half of the cases have a genetic etiology. SGIP1 acts as an endocytic protein that influences the signaling of receptors in neuronal systems related to energy homeostasis through its interaction with endophilins. This study focuses on the generation and characterization of induced pluripotent stem cells (iPSC) from two unrelated patients due to a frameshift variant (c.764dupA, NM_032291.4) and a splice donor site variant (c.74 + 1G > A, NM_032291.4) in the SGIP1 gene.
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Affiliation(s)
- Lieke Dillen
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Neelam Fatima
- Center of Excellence in Molecular Biology, University of Punjab, Lahore, Pakistan
| | - Marina P Hommersom
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands.
| | - Ece Çepni
- Institute of Health Sciences, Koç University, 34010 Istanbul, Turkey
| | - Fareeha Fatima
- Center of Excellence in Molecular Biology, University of Punjab, Lahore, Pakistan
| | - Ellen van Beusekom
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Silvia Albert
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Johanna M van Hagen
- Department of Clinical Genetics, VU University Medical Center, Amsterdam, the Netherlands
| | - Bert B A de Vries
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Asma Ali Khan
- Center of Excellence in Molecular Biology, University of Punjab, Lahore, Pakistan
| | - Arjan P M de Brouwer
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Hans van Bokhoven
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 HB Nijmegen, Netherlands.
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3
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Trevisan V, Meroni A, Leoni C, Sirchia F, Politano D, Fiandrino G, Giorgio V, Rigante D, Limongelli D, Perri L, Sforza E, Leonardi F, Viscogliosi G, Contaldo I, Orteschi D, Proietti L, Zampino G, Onesimo R. Trisomy 22 Mosaicism from Prenatal to Postnatal Findings: A Case Series and Systematic Review of the Literature. Genes (Basel) 2024; 15:346. [PMID: 38540405 PMCID: PMC10970670 DOI: 10.3390/genes15030346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/28/2024] [Accepted: 03/04/2024] [Indexed: 06/14/2024] Open
Abstract
BACKGROUND Among aneuploidies compatible with life, trisomy 22 mosaicism is extremely rare, and only about 25 postnatal and 18 prenatal cases have been described in the literature so far. The condition is mainly characterized by facial and body asymmetry, cardiac heart defects, facial dysmorphisms, growth failure, delayed puberty, and variable degrees of neurodevelopmental delay. PROBLEM The scattered information regarding the condition and the dearth of data on its natural history and developmental outcomes restrict genetic counseling, particularly in prenatal settings. Moreover, a prompt diagnosis is frequently delayed by the negative selection of trisomic cells in blood, with mosaicism percentage varying among tissues, which often entails the need for further testing. Purpose/topic: The aim of our work is to provide assistance in prenatal and postnatal genetic counseling by systematically delineating the current knowledge of the condition. This entails defining the prenatal and postnatal characteristics of the condition and presenting novel data from three cases, both prenatally and postnatally. Additionally, we report the developmental outcomes observed in two new patients.
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Affiliation(s)
- Valentina Trevisan
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
- Genomic Medicine, Department of Life Sciences and Public Health, Catholic University of the Sacred Heart, 00168 Rome, Italy; (F.L.); (D.O.)
| | - Anna Meroni
- Human Genetics, Molecular Medicine Department, University of Pavia and IRCCS Fondazione Policlinico San Matteo, 27100 Pavia, Italy; (A.M.); (F.S.)
| | - Chiara Leoni
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
| | - Fabio Sirchia
- Human Genetics, Molecular Medicine Department, University of Pavia and IRCCS Fondazione Policlinico San Matteo, 27100 Pavia, Italy; (A.M.); (F.S.)
| | - Davide Politano
- Department of Brain and Behavioral Sciences, University of Pavia, IRCCS Mondino, 27100 Pavia, Italy;
| | - Giacomo Fiandrino
- Department of Molecular Medicine, Anatomic Pathology Unit, University of Pavia and Fondazione IRCCS San Matteo Hospital, 27100 Pavia, Italy;
| | - Valentina Giorgio
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
| | - Donato Rigante
- Department of Life Sciences and Public Health, Catholic University of the Sacred Heart, 00168 Rome, Italy;
- Child Neurology and Psychiatry Unit, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (E.S.); (I.C.)
| | - Domenico Limongelli
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
| | - Lucrezia Perri
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
| | - Elisabetta Sforza
- Child Neurology and Psychiatry Unit, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (E.S.); (I.C.)
| | - Francesca Leonardi
- Genomic Medicine, Department of Life Sciences and Public Health, Catholic University of the Sacred Heart, 00168 Rome, Italy; (F.L.); (D.O.)
| | - Germana Viscogliosi
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
| | - Ilaria Contaldo
- Child Neurology and Psychiatry Unit, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (E.S.); (I.C.)
| | - Daniela Orteschi
- Genomic Medicine, Department of Life Sciences and Public Health, Catholic University of the Sacred Heart, 00168 Rome, Italy; (F.L.); (D.O.)
- Genetic Unit, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy
| | - Luca Proietti
- Department of Orthopaedics and Traumatology, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy;
| | - Giuseppe Zampino
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
- Department of Life Sciences and Public Health, Catholic University of the Sacred Heart, 00168 Rome, Italy;
| | - Roberta Onesimo
- Centre for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (C.L.); (V.G.); (D.L.); (L.P.); (G.V.); (G.Z.); (R.O.)
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4
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Schobers G, Derks R, den Ouden A, Swinkels H, van Reeuwijk J, Bosgoed E, Lugtenberg D, Sun SM, Corominas Galbany J, Weiss M, Blok MJ, Olde Keizer RACM, Hofste T, Hellebrekers D, de Leeuw N, Stegmann A, Kamsteeg EJ, Paulussen ADC, Ligtenberg MJL, Bradley XZ, Peden J, Gutierrez A, Pullen A, Payne T, Gilissen C, van den Wijngaard A, Brunner HG, Nelen M, Yntema HG, Vissers LELM. Genome sequencing as a generic diagnostic strategy for rare disease. Genome Med 2024; 16:32. [PMID: 38355605 PMCID: PMC10868087 DOI: 10.1186/s13073-024-01301-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 02/02/2024] [Indexed: 02/16/2024] Open
Abstract
BACKGROUND To diagnose the full spectrum of hereditary and congenital diseases, genetic laboratories use many different workflows, ranging from karyotyping to exome sequencing. A single generic high-throughput workflow would greatly increase efficiency. We assessed whether genome sequencing (GS) can replace these existing workflows aimed at germline genetic diagnosis for rare disease. METHODS We performed short-read GS (NovaSeq™6000; 150 bp paired-end reads, 37 × mean coverage) on 1000 cases with 1271 known clinically relevant variants, identified across different workflows, representative of our tertiary diagnostic centers. Variants were categorized into small variants (single nucleotide variants and indels < 50 bp), large variants (copy number variants and short tandem repeats) and other variants (structural variants and aneuploidies). Variant calling format files were queried per variant, from which workflow-specific true positive rates (TPRs) for detection were determined. A TPR of ≥ 98% was considered the threshold for transition to GS. A GS-first scenario was generated for our laboratory, using diagnostic efficacy and predicted false negative as primary outcome measures. As input, we modeled the diagnostic path for all 24,570 individuals referred in 2022, combining the clinical referral, the transition of the underlying workflow(s) to GS, and the variant type(s) to be detected. RESULTS Overall, 95% (1206/1271) of variants were detected. Detection rates differed per variant category: small variants in 96% (826/860), large variants in 93% (341/366), and other variants in 87% (39/45). TPRs varied between workflows (79-100%), with 7/10 being replaceable by GS. Models for our laboratory indicate that a GS-first strategy would be feasible for 84.9% of clinical referrals (750/883), translating to 71% of all individuals (17,444/24,570) receiving GS as their primary test. An estimated false negative rate of 0.3% could be expected. CONCLUSIONS GS can capture clinically relevant germline variants in a 'GS-first strategy' for the majority of clinical indications in a genetics diagnostic lab.
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Affiliation(s)
- Gaby Schobers
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
| | - Ronny Derks
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | - Amber den Ouden
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | - Hilde Swinkels
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | - Jeroen van Reeuwijk
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
| | - Ermanno Bosgoed
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | | | - Su Ming Sun
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, Netherlands
| | - Jordi Corominas Galbany
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
| | - Marjan Weiss
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | - Marinus J Blok
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, Netherlands
| | - Richelle A C M Olde Keizer
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
| | - Tom Hofste
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | - Debby Hellebrekers
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, Netherlands
| | - Nicole de Leeuw
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | - Alexander Stegmann
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, Netherlands
| | | | - Aimee D C Paulussen
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, Netherlands
| | - Marjolijn J L Ligtenberg
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
| | | | | | | | | | | | - Christian Gilissen
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
| | | | - Han G Brunner
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, Netherlands
| | - Marcel Nelen
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
| | - Helger G Yntema
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands
| | - Lisenka E L M Vissers
- Department of Human Genetics, Radboudumc, Nijmegen, Netherlands.
- Research Institute for Medical Innovation, Radboudumc, Nijmegen, Netherlands.
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Calame DG, Emrick LT. Functional genomics and small molecules in mitochondrial neurodevelopmental disorders. Neurotherapeutics 2024; 21:e00316. [PMID: 38244259 PMCID: PMC10903096 DOI: 10.1016/j.neurot.2024.e00316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 12/16/2023] [Accepted: 01/02/2024] [Indexed: 01/22/2024] Open
Abstract
Mitochondria are critical for brain development and homeostasis. Therefore, pathogenic variation in the mitochondrial or nuclear genome which disrupts mitochondrial function frequently results in developmental disorders and neurodegeneration at the organismal level. Large-scale application of genome-wide technologies to individuals with mitochondrial diseases has dramatically accelerated identification of mitochondrial disease-gene associations in humans. Multi-omic and high-throughput studies involving transcriptomics, proteomics, metabolomics, and saturation genome editing are providing deeper insights into the functional consequence of mitochondrial genomic variation. Integration of deep phenotypic and genomic data through allelic series continues to uncover novel mitochondrial functions and permit mitochondrial gene function dissection on an unprecedented scale. Finally, mitochondrial disease-gene associations illuminate disease mechanisms and thereby direct therapeutic strategies involving small molecules and RNA-DNA therapeutics. This review summarizes progress in functional genomics and small molecule therapeutics in mitochondrial neurodevelopmental disorders.
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Affiliation(s)
- Daniel G Calame
- Section of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA; Texas Children's Hospital, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
| | - Lisa T Emrick
- Section of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA; Texas Children's Hospital, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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6
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Dumitru C. Exploring the transformative power of dance: A scoping review of dance interventions for adults with intellectual disabilities. JOURNAL OF INTELLECTUAL DISABILITIES : JOID 2023:17446295231218781. [PMID: 38059909 DOI: 10.1177/17446295231218781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
The aim of this scoping literature review (SCR) was to analyze the impact of dance on adults with intellectual disabilities, specifically examining its influence on their mobility, interpersonal relationships, well-being, and overall quality of life. A total of 15 papers were reviewed in order to explore the effects of dance on the well-being and quality of life of adults with intellectual disabilities. The findings indicated significant improvements in body awareness, increased engagement in physical activity, and enhanced mental health. This SCR demonstrates that dance is an effective means of facilitating social interaction among adults with intellectual disabilities, both with their therapists and family members. Additionally, the review uncovered valuable data on dance therapy programs designed for adults with intellectual disabilities, highlighting their potential to promote physical activity and reduce stress levels.
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Affiliation(s)
- Cristina Dumitru
- Department of Educational Sciences, The National University of Science and Technology POLITEHNICA Bucharest, Pitești University Centre, Romania
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7
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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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Gupta V, Ben-Mahmoud A, Ku B, Velayutham D, Jan Z, Yousef Aden A, Kubbar A, Alshaban F, Stanton LW, Jithesh PV, Layman LC, Kim HG. Identification of two novel autism genes, TRPC4 and SCFD2, in Qatar simplex families through exome sequencing. Front Psychiatry 2023; 14:1251884. [PMID: 38025430 PMCID: PMC10644705 DOI: 10.3389/fpsyt.2023.1251884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 10/09/2023] [Indexed: 12/01/2023] Open
Abstract
This study investigated the genetic underpinnings of autism spectrum disorder (ASD) in a Middle Eastern cohort in Qatar using exome sequencing. The study identified six candidate autism genes in independent simplex families, including both four known and two novel autosomal dominant and autosomal recessive genes associated with ASD. The variants consisted primarily of de novo and homozygous missense and splice variants. Multiple individuals displayed more than one candidate variant, suggesting the potential involvement of digenic or oligogenic models. These variants were absent in the Genome Aggregation Database (gnomAD) and exhibited extremely low frequencies in the local control population dataset. Two novel autism genes, TRPC4 and SCFD2, were discovered in two Qatari autism individuals. Furthermore, the D651A substitution in CLCN3 and the splice acceptor variant in DHX30 were identified as likely deleterious mutations. Protein modeling was utilized to evaluate the potential impact of three missense variants in DEAF1, CLCN3, and SCFD2 on their respective structures and functions, which strongly supported the pathogenic natures of these variants. The presence of multiple de novo mutations across trios underscored the significant contribution of de novo mutations to the genetic etiology of ASD. Functional assays and further investigations are necessary to confirm the pathogenicity of the identified genes and determine their significance in ASD. Overall, this study sheds light on the genetic factors underlying ASD in Qatar and highlights the importance of considering diverse populations in ASD research.
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Affiliation(s)
- Vijay Gupta
- Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Afif Ben-Mahmoud
- Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Bonsu Ku
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Dinesh Velayutham
- College of Health & Life Sciences, Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Zainab Jan
- College of Health & Life Sciences, Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Abdi Yousef Aden
- Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Ahmad Kubbar
- Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Fouad Alshaban
- Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
- College of Health & Life Sciences, Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Lawrence W. Stanton
- Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
- College of Health & Life Sciences, Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Puthen Veettil Jithesh
- College of Health & Life Sciences, Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
| | - Lawrence C. Layman
- Section of Reproductive Endocrinology, Infertility and Genetics, Department of Obstetrics and Gynecology, Augusta University, Augusta, GA, United States
- Department of Neuroscience and Regenerative Medicine, Augusta University, Augusta, GA, United States
| | - Hyung-Goo Kim
- Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
- College of Health & Life Sciences, Qatar Foundation, Hamad Bin Khalifa University (HBKU), Doha, Qatar
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