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Birnbaum R, Ezer S, Lotan NS, Eilat A, Sternlicht K, Benyamini L, Reish O, Falik-Zaccai T, Ben-Gad G, Rod R, Segel R, Kim K, Burton B, Keegan CE, Wagner M, Henderson LB, Mor N, Barel O, Hirsch Y, Meiner V, Elpeleg O, Harel T, Mor-Shakad H. Intellectual disability syndrome associated with a homozygous founder variant in SGSM3 in Ashkenazi Jews. J Med Genet 2024; 61:289-293. [PMID: 37833060 DOI: 10.1136/jmg-2023-109504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023]
Abstract
BACKGROUND Neurodevelopmental disorders (NDDs) impact both the development and functioning of the brain and exhibit clinical and genetic variability. RAP and RAB proteins, belonging to the RAS superfamily, are identified as established contributors to NDDs. However, the involvement of SGSM (small G protein signalling modulator), another member of the RAS family, in NDDs has not been previously documented. METHODS Proband-only or trio exome sequencing was performed on DNA samples obtained from affected individuals and available family members. The variant prioritisation process focused on identifying rare deleterious variants. International collaboration aided in the identification of additional affected individuals. RESULTS We identified 13 patients from 8 families of Ashkenazi Jewish origin who all carried the same homozygous frameshift variant in SGSM3 gene. The variant was predicted to cause a loss of function, potentially leading to impaired protein structure or function. The variant co-segregated with the disease in all available family members. The affected individuals displayed mild global developmental delay and mild to moderate intellectual disability. Additional prevalent phenotypes observed included hypotonia, behavioural challenges and short stature. CONCLUSIONS An Ashkenazi Jewish homozygous founder variant in SGSM3 was discovered in individuals with NDDs and short stature. This finding establishes a connection between another member of the RAS family and NDDs. Additional research is needed to uncover the specific molecular mechanisms by which SGSM3 influences neurodevelopmental processes and the regulation of growth.
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Affiliation(s)
- Rivka Birnbaum
- Department of Genetics, Hadassah Medical Center, Jerusalem, Israel
| | - Shlomit Ezer
- Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Nava Shaul Lotan
- Department of Genetics, Hadassah Medical Center, Jerusalem, Israel
| | - Avital Eilat
- Department of Genetics, Hadassah Medical Center, Jerusalem, Israel
| | | | | | - Orit Reish
- Genetics Institute, Shamir Medical Center, Tzrifin, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Tzipora Falik-Zaccai
- Institute of Human Genetics, Western Galilee Hospital-Nahariya, Nahariya, Israel
| | - Gali Ben-Gad
- Department of Child Development, Galilee Medical Center, Nahariya, Israel
| | - Raya Rod
- The Center for Child Development and Pediatric Neurology, Western Galilee Hospital-Naharyia, Nahariya, Israel
| | | | - Katherine Kim
- Genetics, Ann and Robert H Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
- Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Barabra Burton
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
| | - Catherine E Keegan
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
| | - Mallory Wagner
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Nofar Mor
- The Genomic Unit, Sheba Cancer Research Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Ortal Barel
- The Genomic Unit, Sheba Cancer Research Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Yoel Hirsch
- Research, Dor Yeshroim, Brooklyn, New York, USA
- Dor Yeshorim, New York, New York, USA
| | - Vardiella Meiner
- Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Genetics, Hadassah Medical Center, Jerusalem, Jerusalem, Israel
| | - Orly Elpeleg
- Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Genetics, Hadassah Medical Center, Jerusalem, Jerusalem, Israel
| | - Tamar Harel
- Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Genetics, Hadassah Medical Center, Jerusalem, Jerusalem, Israel
| | - Hagar Mor-Shakad
- Department of Genetics, Hadassah Medical Center, Jerusalem, Israel
- Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
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2
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Saffari A, Lau T, Tajsharghi H, Karimiani EG, Kariminejad A, Efthymiou S, Zifarelli G, Sultan T, Toosi MB, Sedighzadeh S, Siu VM, Ortigoza-Escobar JD, AlShamsi AM, Ibrahim S, Al-Sannaa NA, Al-Hertani W, Sandra W, Tarnopolsky M, Alavi S, Li C, Day-Salvatore DL, Martínez-González MJ, Levandoski KM, Bedoukian E, Madan-Khetarpal S, Idleburg MJ, Menezes MJ, Siddharth A, Platzer K, Oppermann H, Smitka M, Collins F, Lek M, Shahrooei M, Ghavideldarestani M, Herman I, Rendu J, Faure J, Baker J, Bhambhani V, Calderwood L, Akhondian J, Imannezhad S, Mirzadeh HS, Hashemi N, Doosti M, Safi M, Ahangari N, Torbati PN, Abedini S, Salpietro V, Gulec EY, Eshaghian S, Ghazavi M, Pascher MT, Vogel M, Abicht A, Moutton S, Bruel AL, Rieubland C, Gallati S, Strom TM, Lochmüller H, Mohammadi MH, Alvi JR, Zackai EH, Keena BA, Skraban CM, Berger SI, Andrew EH, Rahimian E, Morrow MM, Wentzensen IM, Millan F, Henderson LB, Dafsari HS, Jungbluth H, Gomez-Ospina N, McRae A, Peter M, Veltra D, Marinakis NM, Sofocleous C, Ashrafzadeh F, Pehlivan D, Lemke JR, Melki J, Benezit A, Bauer P, Weis D, Lupski JR, Senderek J, Christodoulou J, Chung WK, Goodchild R, Offiah AC, Moreno-De-Luca A, Suri M, Ebrahimi-Fakhari D, Houlden H, Maroofian R. The clinical and genetic spectrum of autosomal-recessive TOR1A-related disorders. Brain 2023; 146:3273-3288. [PMID: 36757831 PMCID: PMC10393417 DOI: 10.1093/brain/awad039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 12/20/2022] [Accepted: 01/23/2023] [Indexed: 02/10/2023] Open
Abstract
In the field of rare diseases, progress in molecular diagnostics led to the recognition that variants linked to autosomal-dominant neurodegenerative diseases of later onset can, in the context of biallelic inheritance, cause devastating neurodevelopmental disorders and infantile or childhood-onset neurodegeneration. TOR1A-associated arthrogryposis multiplex congenita 5 (AMC5) is a rare neurodevelopmental disorder arising from biallelic variants in TOR1A, a gene that in the heterozygous state is associated with torsion dystonia-1 (DYT1 or DYT-TOR1A), an early-onset dystonia with reduced penetrance. While 15 individuals with AMC5-TOR1A have been reported (less than 10 in detail), a systematic investigation of the full disease-associated spectrum has not been conducted. Here, we assess the clinical, radiological and molecular characteristics of 57 individuals from 40 families with biallelic variants in TOR1A. Median age at last follow-up was 3 years (0-24 years). Most individuals presented with severe congenital flexion contractures (95%) and variable developmental delay (79%). Motor symptoms were reported in 79% and included lower limb spasticity and pyramidal signs, as well as gait disturbances. Facial dysmorphism was an integral part of the phenotype, with key features being a broad/full nasal tip, narrowing of the forehead and full cheeks. Analysis of disease-associated manifestations delineated a phenotypic spectrum ranging from normal cognition and mild gait disturbance to congenital arthrogryposis, global developmental delay, intellectual disability, absent speech and inability to walk. In a subset, the presentation was consistent with foetal akinesia deformation sequence with severe intrauterine abnormalities. Survival was 71%, with higher mortality in males. Death occurred at a median age of 1.2 months (1 week-9 years), due to respiratory failure, cardiac arrest or sepsis. Analysis of brain MRI studies identified non-specific neuroimaging features, including a hypoplastic corpus callosum (72%), foci of signal abnormality in the subcortical and periventricular white matter (55%), diffuse white matter volume loss (45%), mega cisterna magna (36%) and arachnoid cysts (27%). The molecular spectrum included 22 distinct variants, defining a mutational hotspot in the C-terminal domain of the Torsin-1A protein. Genotype-phenotype analysis revealed an association of missense variants in the 3-helix bundle domain to an attenuated phenotype, while missense variants near the Walker A/B motif as well as biallelic truncating variants were linked to early death. In summary, this systematic cross-sectional analysis of a large cohort of individuals with biallelic TOR1A variants across a wide age-range delineates the clinical and genetic spectrum of TOR1A-related autosomal-recessive disease and highlights potential predictors for disease severity and survival.
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Affiliation(s)
- Afshin Saffari
- Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
- Division of Child Neurology and Inherited Metabolic Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Tracy Lau
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
| | - Homa Tajsharghi
- School of Health Sciences, Division of Biomedicine, University of Skovde, Skovde, Sweden
| | - Ehsan Ghayoor Karimiani
- Molecular and Clinical Sciences Institute, St. George's, University of London, Cranmer Terrace, London, UK
- Department of Medical Genetics, Next Generation Genetic Polyclinic, Mashhad, Iran
| | | | - Stephanie Efthymiou
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
| | | | - Tipu Sultan
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
| | - Mehran Beiraghi Toosi
- Department of Pediatrics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Sahar Sedighzadeh
- Department of Biological Sciences, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
- KaryoGen, Isfahan, Iran
| | - Victoria Mok Siu
- Division of Medical Genetics, Department of Pediatrics, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Juan Darío Ortigoza-Escobar
- Movement Disorders Unit, Pediatric Neurology Department, Institut de Recerca, Hospital Sant Joan de Déu Barcelona, Barcelona, Spain
| | - Aisha M AlShamsi
- Genetic Division, Pediatrics Department, Tawam Hospital, Al Ain, UAE
| | - Shahnaz Ibrahim
- Department of pediatrics and child Health, Aga Khan University, Karachi, Pakistan
| | | | - Walla Al-Hertani
- Harvard Medical School, Boston Children's Hospital, Department of Pediatrics, Division of Genetics and Genomics, Boston, MA, USA
| | - Whalen Sandra
- APHP UF de Génétique Clinique, Centre de Référence des Anomalies du Développement et Syndromes Malformatifs, APHP, Hôpital Armand Trousseau, ERN ITHACA, Sorbonne Université, Paris, France
| | - Mark Tarnopolsky
- Department of Pediatrics (MT – Neuromuscular and Neurometabolics, CL – Medical Genetics), McMaster Children's Hospital, Hamilton, Ontario, Canada
| | - Shahryar Alavi
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
| | - Chumei Li
- Department of Pediatrics (MT – Neuromuscular and Neurometabolics, CL – Medical Genetics), McMaster Children's Hospital, Hamilton, Ontario, Canada
| | - Debra-Lynn Day-Salvatore
- The Department of Medical Genetics and Genomic Medicine at Saint Peter's University Hospital, New Brunswick, NJ, USA
| | | | - Kristin M Levandoski
- The Department of Medical Genetics and Genomic Medicine at Saint Peter's University Hospital, New Brunswick, NJ, USA
| | - Emma Bedoukian
- Roberts Individualized Medical Genetics Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Suneeta Madan-Khetarpal
- Division of Genetic and Genomic Medicine, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Michaela J Idleburg
- Division of Genetic and Genomic Medicine, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Minal Juliet Menezes
- Department of Anaesthesia, the Children's Hospital at Westmead, Sydney, NSW, Australia
- Discipline of Child and Adolescent Health, and Specialty of Genomic Medicine, Sydney Medical School, Sydney University, Sydney, NSW, Australia
| | - Aishwarya Siddharth
- Harvard Medical School, Boston Children's Hospital, Department of Pediatrics, Division of Genetics and Genomics, Boston, MA, USA
| | - Konrad Platzer
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Henry Oppermann
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Martin Smitka
- Department of Neuropediatrics, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
| | - Felicity Collins
- Discipline of Child and Adolescent Health, and Specialty of Genomic Medicine, Sydney Medical School, Sydney University, Sydney, NSW, Australia
- Department of Clinical Genetics, Children's Hospital at Westmead, Sydney, NSW, Australia
| | - Monkol Lek
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut, USA
| | - Mohmmad Shahrooei
- Medical Laboratory of Dr. Shahrooei, Tehran, Iran
- Department of Microbiology and Immunology, Clinical and Diagnostic Immunology, KU Leuven, Leuven, Belgium
| | | | - Isabella Herman
- Section of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Texas Children's Hospital, Houston, TX, USA
- Division of Pediatric Neuroscience, Boys Town National Research Hospital, Boys Town, NE, USA
| | - John Rendu
- Univ. Grenoble Alpes, Inserm, U1216, CHU Grenoble Alpes, Grenoble Institut Neurosciences, Grenoble, France
| | - Julien Faure
- Univ. Grenoble Alpes, Inserm, U1216, CHU Grenoble Alpes, Grenoble Institut Neurosciences, Grenoble, France
| | - Janice Baker
- Division of Genetics and Genomic Medicine, Children's Hospital and Clinics of Minnesota, Minneapolis, Minnesota, USA
| | - Vikas Bhambhani
- Division of Genetics and Genomic Medicine, Children's Hospital and Clinics of Minnesota, Minneapolis, Minnesota, USA
| | - Laurel Calderwood
- Lucile Packard Children's Hospital Stanford, Palo Alto, CA, USA
- Department of Pediatrics, Division of Medical Genetics, Stanford University School of Medicine, Stanford, CA, USA
| | - Javad Akhondian
- Pediatric Neurology Department, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Shima Imannezhad
- Department of Pediatric Neurology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hanieh Sadat Mirzadeh
- Department of Pediatric Neurology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Narges Hashemi
- Department of Pediatrics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Doosti
- Department of Medical Genetics, Next Generation Genetic Polyclinic, Mashhad, Iran
| | - Mojtaba Safi
- Department of Medical Genetics, Next Generation Genetic Polyclinic, Mashhad, Iran
| | - Najmeh Ahangari
- Innovative medical research centre, Mashhad branch, Islamic Azad University, Mashhad, Iran
| | | | - Soheila Abedini
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
| | - Vincenzo Salpietro
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
| | - Elif Yilmaz Gulec
- Istanbul Medeniyet University Medical School, Department of Medical Genetics, Istanbul, Turkey
| | | | - Mohammadreza Ghazavi
- Department of Pediatric Neurology, Imam Hossein Children's Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Michael T Pascher
- Friedrich-Baur-Institute at the Department of Neurology, University Hospital, LMU Munich, Munich, Germany
| | - Marina Vogel
- Friedrich-Baur-Institute at the Department of Neurology, University Hospital, LMU Munich, Munich, Germany
- Deutsches Krebsforschungszentrum, Heidelberg, Germany
| | - Angela Abicht
- Friedrich-Baur-Institute at the Department of Neurology, University Hospital, LMU Munich, Munich, Germany
- Medizinisch Genetisches Zentrum, Munich, German
| | - Sébastien Moutton
- Multidisciplinary Center for Prenatal Diagnosis, Pôle Mère Enfant, Maison de Santé Protestante Bordeaux Bagatelle, Talence, France
| | - Ange-Line Bruel
- Équipe Génétique des Anomalies du Développement (GAD), INSERM UMR1231, Dijon, France
- Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, Dijon University Hospital, Dijon, France
| | - Claudine Rieubland
- Division of Human Genetics, Department of Pediatrics, Inselspital, University of Bern, Switzerland
| | - Sabina Gallati
- Division of Human Genetics, Department of Pediatrics, Inselspital, University of Bern, Switzerland
| | - Tim M Strom
- Institute of Human Genetics, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Hanns Lochmüller
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, Canada
- Division of Neurology, Department of Medicine, The Ottawa Hospital, Ottawa, Canada
| | | | - Javeria Raza Alvi
- Department of Pediatric Neurology, The Children's Hospital and the University of Child Health Sciences, Lahore, Pakistan
| | - Elaine H Zackai
- Division of Human Genetics, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Beth A Keena
- Division of Human Genetics, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Cara M Skraban
- Division of Human Genetics, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Seth I Berger
- Children's National Research Institute, Washington DC, USA
| | - Erin H Andrew
- Children's National Research Institute, Washington DC, USA
| | | | | | | | | | | | - Hormos Salimi Dafsari
- Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
- Max-Planck-Institute for Biology of Ageing and CECAD, Cologne, Germany
- Department of Paediatric Neurology - Neuromuscular Service, Evelina London Children's Hospital, Guy's & St Thomas' Hospital NHS Foundation Trust, London, UK
| | - Heinz Jungbluth
- Department of Paediatric Neurology - Neuromuscular Service, Evelina London Children's Hospital, Guy's & St Thomas' Hospital NHS Foundation Trust, London, UK
- Randall Centre for Cell and Molecular Biophysics, Muscle Signalling Section, Faculty of Life Sciences and Medicine (FoLSM), King's College London, London, UK
| | | | - Anne McRae
- Division of Genetics, Genomics, and Metabolism, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, USA
| | - Merlene Peter
- Division of Genetics, Genomics, and Metabolism, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, USA
| | - Danai Veltra
- Laboratory of Medical Genetics, Medical School, National and Kapodistrian University of Athens, St. Sophia's Children's Hospital, Athens, Greece
| | - Nikolaos M Marinakis
- Laboratory of Medical Genetics, Medical School, National and Kapodistrian University of Athens, St. Sophia's Children's Hospital, Athens, Greece
| | - Christalena Sofocleous
- Laboratory of Medical Genetics, Medical School, National and Kapodistrian University of Athens, St. Sophia's Children's Hospital, Athens, Greece
| | - Farah Ashrafzadeh
- Department of Pediatric Neurology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Davut Pehlivan
- Section of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Texas Children's Hospital, Houston, TX, USA
| | - Johannes R Lemke
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
- Center for Rare Diseases, University of Leipzig Medical Center, Leipzig, Germany
| | - Judith Melki
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin Bicêtre, 94276, Paris, France
| | - Audrey Benezit
- Neurologie et réanimation pédiatrique, Hôpital Raymond Poincaré, APHP, Garches, France
| | - Peter Bauer
- CENTOGENE GmbH, Am Strande 7, 18055 Rostock, Germany
| | - Denisa Weis
- Department of Medical Genetics, Kepler University Hospital, Johann Kepler University, Linz, Austria
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Texas Children's Hospital, Houston, TX, USA
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Jan Senderek
- Friedrich-Baur-Institute at the Department of Neurology, University Hospital, LMU Munich, Munich, Germany
| | - John Christodoulou
- Discipline of Child and Adolescent Health, and Specialty of Genomic Medicine, Sydney Medical School, Sydney University, Sydney, NSW, Australia
- Murdoch Children's Research Institute, Melbourne and Department of Paediatrics, Melbourne Medical School, University of Melbourne, Melbourne, VIC, Australia
| | - Wendy K Chung
- Department of Pediatrics and Medicine, Columbia University New York, NY, USA
| | - Rose Goodchild
- KU Leuven Department of Neurosciences, Leuven Brain Institute, Leuven, Belgium
- VIB-KU Leuven Center for Brain and Disease Research, Laboratory for Dystonia Research, Leuven, Belgium
| | - Amaka C Offiah
- Department of Oncology & Metabolism, University of Sheffield, UK
| | - Andres Moreno-De-Luca
- Autism & Developmental Medicine Institute, Genomic Medicine Institute, Department of Radiology, Diagnostic Medicine Institute, Geisinger, Danville, PA, USA
| | - Mohnish Suri
- Clinical Genetics Service, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Darius Ebrahimi-Fakhari
- Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
- Movement Disorders Program, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
- The Manton Center for Orphan Disease Research, Boston Children's Hospital, Boston, MA, USA
- Intellectual and Developmental Disabilities Research Center, Boston Children's Hospital, Boston, MA, USA
| | - Henry Houlden
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
| | - Reza Maroofian
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, UK
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3
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Hirsch Y, Chung WK, Novoselov S, Weimer LH, Rossor A, LeDuc CA, McPartland AJ, Cabrera E, Ekstein J, Scher S, Nelson RF, Schiavo G, Henderson LB, Booth KTA. Biallelic Loss-of-Function Variants in BICD1 Are Associated with Peripheral Neuropathy and Hearing Loss. Int J Mol Sci 2023; 24:8897. [PMID: 37240244 PMCID: PMC10219021 DOI: 10.3390/ijms24108897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/16/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Hearing loss and peripheral neuropathy are two clinical entities that are genetically and phenotypically heterogeneous and sometimes co-occurring. Using exome sequencing and targeted segregation analysis, we investigated the genetic etiology of peripheral neuropathy and hearing loss in a large Ashkenazi Jewish family. Moreover, we assessed the production of the candidate protein via western blotting of lysates from fibroblasts from an affected individual and an unaffected control. Pathogenic variants in known disease genes associated with hearing loss and peripheral neuropathy were excluded. A homozygous frameshift variant in the BICD1 gene, c.1683dup (p.(Arg562Thrfs*18)), was identified in the proband and segregated with hearing loss and peripheral neuropathy in the family. The BIDC1 RNA analysis from patient fibroblasts showed a modest reduction in gene transcripts compared to the controls. In contrast, protein could not be detected in fibroblasts from a homozygous c.1683dup individual, whereas BICD1 was detected in an unaffected individual. Our findings indicate that bi-allelic loss-of-function variants in BICD1 are associated with hearing loss and peripheral neuropathy. Definitive evidence that bi-allelic loss-of-function variants in BICD1 cause peripheral neuropathy and hearing loss will require the identification of other families and individuals with similar variants with the same phenotype.
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Affiliation(s)
- Yoel Hirsch
- Dor Yeshorim, Committee for Prevention Jewish Genetic Diseases, Brooklyn, NY 11211, USA
| | - Wendy K. Chung
- Departments of Pediatrics and Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Sergey Novoselov
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London WC1N 3BG, UK
| | - Louis H. Weimer
- Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Alexander Rossor
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London WC1N 3BG, UK
| | - Charles A. LeDuc
- Departments of Pediatrics and Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Amanda J. McPartland
- Departments of Pediatrics and Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Ernesto Cabrera
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Josef Ekstein
- Dor Yeshorim, Committee for Prevention Jewish Genetic Diseases, Brooklyn, NY 11211, USA
| | - Sholem Scher
- Dor Yeshorim, Committee for Prevention Jewish Genetic Diseases, Brooklyn, NY 11211, USA
| | - Rick F. Nelson
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Giampietro Schiavo
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London WC1N 3BG, UK
- UK Dementia Research Institute at UCL, London WC1E 6BT, UK
| | | | - Kevin T. A. Booth
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Medical and Molecular Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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4
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Thomas-Wilson A, Schacht JP, Chitayat D, Blaser S, Santos FJR, Glaser K, Caffo A, Wentzensen IM, Henderson LB, Zhang F, Zhu Y, Di Corleto E, da Silva Costa F, Vink R, Alkhunaizi E, Russell L, Buckley MF, Roscioli T, Pereira EM, Ganapathi M. Biallelic variants in TUBGCP6 result in microcephaly and chorioretinopathy 1: Report of four cases and a literature review. Am J Med Genet A 2023. [PMID: 37031378 DOI: 10.1002/ajmg.a.63203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 04/10/2023]
Abstract
Autosomal recessive microcephaly and chorioretinopathy-1 (MCCRP1) is a rare Mendelian disorder resulting from biallelic loss of function variants in Tubulin-Gamma Complex Associated Protein 6 (TUBGCP6, MIM#610053). Clinical features of this disorder include microcephaly, cognitive impairment, dysmorphic features, and variable ophthalmological anomalies including chorioretinopathy. Microcephaly can be recognized prenatally and visual impairment becomes evident during the first year of life. The clinical presentation resembles the findings in some acquired conditions such as congenital toxoplasmosis and cytomegalovirus infections; thus, it is important to recognize and diagnose this syndrome in view of its impact on patient health management and familial reproductive plans. To date, only seven molecularly confirmed patients from five unrelated families have been reported. We report an additional four unrelated patients with TUBGCP6 variants including one prenatal diagnosis and review the clinical phenotypes and genotypes of all the known cases. This report expands the molecular and phenotypic spectrum of TUBGCP6 and includes additional prenatal findings associated with MCCRP1.
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Affiliation(s)
- Amanda Thomas-Wilson
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - John P Schacht
- Department of Pediatrics, Division of Clinical Genetics, Columbia University Irving Medical Center, New York, New York, USA
| | - David Chitayat
- Department of Pediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
- The Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynecology, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Susan Blaser
- Department of Diagnostic Imaging, Division of Pediatric Neuroradiology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | | | - Kimberly Glaser
- Department of Clinical Genetics, Joe DiMaggio Children's Hospital, Hollywood, Florida, USA
| | - Alesky Caffo
- Department of Clinical Genetics, Joe DiMaggio Children's Hospital, Hollywood, Florida, USA
| | | | | | - Futao Zhang
- New South Wales Health Pathology, Randwick Genomics Laboratory, Prince of Wales Hospital, Sydney, New South Wales, Australia
| | - Ying Zhu
- New South Wales Health Pathology, Randwick Genomics Laboratory, Prince of Wales Hospital, Sydney, New South Wales, Australia
| | - Ellen Di Corleto
- Maternal Fetal Medicine Unit, Gold Coast University Hospital, Gold Coast, Queensland, Australia
| | - Fabricio da Silva Costa
- Maternal Fetal Medicine Unit, Gold Coast University Hospital, Gold Coast, Queensland, Australia
- School of Medicine and Dentistry, Griffith University, Gold Coast, Queensland, Australia
| | - Rebecca Vink
- Neuroscience Research Australia (NeuRA), Sydney, New South Wales, Australia
- Centre for Clinical Genetics, Sydney Children's Hospital, Sydney, New South Wales, Australia
| | - Ebba Alkhunaizi
- Department of Pediatrics, Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
- Department of Medical Genetics, McGill University Health Centre, Montreal, Quebec, Canada
| | - Laura Russell
- Department of Medical Genetics, McGill University Health Centre, Montreal, Quebec, Canada
| | - Michael F Buckley
- New South Wales Health Pathology, Randwick Genomics Laboratory, Prince of Wales Hospital, Sydney, New South Wales, Australia
| | - Tony Roscioli
- New South Wales Health Pathology, Randwick Genomics Laboratory, Prince of Wales Hospital, Sydney, New South Wales, Australia
- Neuroscience Research Australia (NeuRA), Sydney, New South Wales, Australia
- Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Elaine Maria Pereira
- Department of Pediatrics, Division of Clinical Genetics, Columbia University Irving Medical Center, New York, New York, USA
| | - Mythily Ganapathi
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
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5
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Sheppard SE, Bryant L, Wickramasekara RN, Vaccaro C, Robertson B, Hallgren J, Hulen J, Watson CJ, Faundes V, Duffourd Y, Lee P, Simon MC, de la Cruz X, Padilla N, Flores-Mendez M, Akizu N, Smiler J, Pellegrino Da Silva R, Li D, March M, Diaz-Rosado A, Peixoto de Barcelos I, Choa ZX, Lim CY, Dubourg C, Journel H, Demurger F, Mulhern M, Akman C, Lippa N, Andrews M, Baldridge D, Constantino J, van Haeringen A, Snoeck-Streef I, Chow P, Hing A, Graham JM, Au M, Faivre L, Shen W, Mao R, Palumbos J, Viskochil D, Gahl W, Tifft C, Macnamara E, Hauser N, Miller R, Maffeo J, Afenjar A, Doummar D, Keren B, Arn P, Macklin-Mantia S, Meerschaut I, Callewaert B, Reis A, Zweier C, Brewer C, Saggar A, Smeland MF, Kumar A, Elmslie F, Deshpande C, Nizon M, Cogne B, van Ierland Y, Wilke M, van Slegtenhorst M, Koudijs S, Chen JY, Dredge D, Pier D, Wortmann S, Kamsteeg EJ, Koch J, Haynes D, Pollack L, Titheradge H, Ranguin K, Denommé-Pichon AS, Weber S, Pérez de la Fuente R, Sánchez del Pozo J, Lezana Rosales JM, Joset P, Steindl K, Rauch A, Mei D, Mari F, Guerrini R, Lespinasse J, Tran Mau-Them F, Philippe C, Dauriat B, Raymond L, Moutton S, Cueto-González AM, Tan TY, Mignot C, Grotto S, Renaldo F, Drivas TG, Hennessy L, Raper A, Parenti I, Kaiser FJ, Kuechler A, Busk ØL, Islam L, Siedlik JA, Henderson LB, Juusola J, Person R, Schnur RE, Vitobello A, Banka S, Bhoj EJ, Stessman HA. Mechanism of KMT5B haploinsufficiency in neurodevelopment in humans and mice. Sci Adv 2023; 9:eade1463. [PMID: 36897941 PMCID: PMC10005179 DOI: 10.1126/sciadv.ade1463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Pathogenic variants in KMT5B, a lysine methyltransferase, are associated with global developmental delay, macrocephaly, autism, and congenital anomalies (OMIM# 617788). Given the relatively recent discovery of this disorder, it has not been fully characterized. Deep phenotyping of the largest (n = 43) patient cohort to date identified that hypotonia and congenital heart defects are prominent features that were previously not associated with this syndrome. Both missense variants and putative loss-of-function variants resulted in slow growth in patient-derived cell lines. KMT5B homozygous knockout mice were smaller in size than their wild-type littermates but did not have significantly smaller brains, suggesting relative macrocephaly, also noted as a prominent clinical feature. RNA sequencing of patient lymphoblasts and Kmt5b haploinsufficient mouse brains identified differentially expressed pathways associated with nervous system development and function including axon guidance signaling. Overall, we identified additional pathogenic variants and clinical features in KMT5B-related neurodevelopmental disorder and provide insights into the molecular mechanisms of the disorder using multiple model systems.
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Affiliation(s)
- Sarah E. Sheppard
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Unit on Vascular Malformations, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA
| | - Laura Bryant
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Rochelle N. Wickramasekara
- Stessman Laboratory, Department of Pharmacology and Neuroscience, Creighton University Medical School, Omaha, NE, USA
- Molecular Diagnostic Laboratory, Boys Town National Research Hospital, Omaha, NE, USA
| | - Courtney Vaccaro
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Brynn Robertson
- Stessman Laboratory, Department of Pharmacology and Neuroscience, Creighton University Medical School, Omaha, NE, USA
| | - Jodi Hallgren
- Stessman Laboratory, Department of Pharmacology and Neuroscience, Creighton University Medical School, Omaha, NE, USA
| | - Jason Hulen
- Stessman Laboratory, Department of Pharmacology and Neuroscience, Creighton University Medical School, Omaha, NE, USA
| | - Cynthia J. Watson
- Stessman Laboratory, Department of Pharmacology and Neuroscience, Creighton University Medical School, Omaha, NE, USA
| | - Victor Faundes
- Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
- Laboratorio de Genética y Enfermedades Metabólicas, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
| | - Yannis Duffourd
- Unité Fonctionnelle d’Innovation diagnostique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| | - Pearl Lee
- Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - M. Celeste Simon
- Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Xavier de la Cruz
- Vall d’Hebron Institute of Research (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Institució Catalana de Recerca I Estudis Avançats (ICREA), Barcelona, Spain
| | - Natália Padilla
- Vall d’Hebron Institute of Research (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marco Flores-Mendez
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Naiara Akizu
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jacqueline Smiler
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- 10x Genomics, Pleasanton, CA, USA
| | | | - Dong Li
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Michael March
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Abdias Diaz-Rosado
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | | | - Zhao Xiang Choa
- Epithelial Epigenetics and Development Laboratory, A*STAR Skin Research Labs, Singapore, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Chin Yan Lim
- Epithelial Epigenetics and Development Laboratory, A*STAR Skin Research Labs, Singapore, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Christèle Dubourg
- Laboratoire de Génétique Moléculaire et Génomique, Centre Hospitalier Universitaire de Rennes, Rennes 35033, France
| | - Hubert Journel
- Service de Génétique Médicale, Hopital Chubert, Vannes, Bretagne, France
| | - Florence Demurger
- Department of Clinical Genetics, Service de Génétique Clinique, Centre de Référence Maladies Rares Centre Labellisé Anomalies du Développement-Ouest, Centre Hospitalier Universitaire de Rennes, Rennes 35033, France
| | - Maureen Mulhern
- Department of Pathology, Columbia University Irving Medical Center, New York, NY, USA
- Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Cigdem Akman
- Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Natalie Lippa
- Institute for Genomic Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Marisa Andrews
- Division of Genetics and Genomic Medicine, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - Dustin Baldridge
- Division of Genetics and Genomic Medicine, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - John Constantino
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Arie van Haeringen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, Netherlands
| | - Irina Snoeck-Streef
- Department of Child Neurology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Penny Chow
- Department of Pediatrics, Division of Craniofacial Medicine, University of Washington, Seattle, WA, USA
| | - Anne Hing
- Department of Pediatrics, Division of Craniofacial Medicine, University of Washington, Seattle, WA, USA
| | - John M. Graham
- Medical Genetics, Department of Pediatrics, Cedars-Sinai Medical Center, UCLA School of Medicine, Los Angeles, CA, USA
| | - Margaret Au
- Medical Genetics, Department of Pediatrics, Cedars-Sinai Medical Center, UCLA School of Medicine, Los Angeles, CA, USA
| | - Laurence Faivre
- UFR Des Sciences de Santé, INSERM–Université de Bourgogne UMR1231 GAD “Génétique des Anomalies du Développement,” FHU-TRANSLAD, Dijon, France
- Centre de Référence Anomalies du Développement et Syndromes Malformatifs, CHU Dijon, Bourgogne, France
| | - Wei Shen
- University of Utah, Salt Lake City, UT, USA
- Mayo Clinic, Rochester, MN, USA
| | - Rong Mao
- University of Utah, Salt Lake City, UT, USA
| | | | | | - William Gahl
- NIH Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Cynthia Tifft
- NIH Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Ellen Macnamara
- NIH Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Natalie Hauser
- Medical Genetics, Inova Fairfax Hospital, Falls Church, VA, USA
| | - Rebecca Miller
- Medical Genetics, Inova Fairfax Hospital, Falls Church, VA, USA
| | - Jessica Maffeo
- Medical Genetics, Inova Fairfax Hospital, Falls Church, VA, USA
| | - Alexandra Afenjar
- AP-HP, Sorbonne Université, Département de neuropediatrie, Hospital Armand Trousseau, Paris, France
| | - Diane Doummar
- AP-HP, Sorbonne Université, Département de neuropediatrie, Hospital Armand Trousseau, Paris, France
| | - Boris Keren
- Genetic Department, Pitié-Salpêtrière Hospital, AP-HP, Sorbonne Université, Paris, France
| | - Pamela Arn
- Department of Pediatrics, Nemours Children’s Specialty Care, Jacksonville, FL, USA
| | | | - Ilse Meerschaut
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
| | - Bert Callewaert
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - André Reis
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Christiane Zweier
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
- Department of Human Genetics, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Carole Brewer
- Clinical Genetics Department, Royal Devon and Exeter Hospital (Heavitree), Exeter EX1 2ED, UK
| | - Anand Saggar
- Clinical Genetics Department, St George’s Hospital, St George’s Healthcare NHS Trust, London SW17 0QT, UK
| | - Marie F. Smeland
- Department of Medical Genetics, University Hospital of North Norway, Tromsø, Norway
- Department of Pediatric Rehabilitation, University Hospital of North Norway, Norway
| | - Ajith Kumar
- Northeast Thames Regional Genetics Service, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Frances Elmslie
- South West Thames Centre for Genomics, St George’s University Hospitals NHS Foundation Trust, London SW17 0QT, UK
| | - Charu Deshpande
- Department of Medical Genetics, Guy’s Hospital, London SE1 9RT, UK
| | - Mathilde Nizon
- CHU Nantes, Service de Génétique Médicale, 9 quai Moncousu, 44093 Nantes CEDEX 1, France
| | - Benjamin Cogne
- CHU Nantes, Service de Génétique Médicale, 9 quai Moncousu, 44093 Nantes CEDEX 1, France
- Nantes Université, CNRS, INSERM, L’institut du thorax, F-44000 Nantes, France
| | - Yvette van Ierland
- Department of Clinical Genetics, Erasmus University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, Netherlands
| | - Martina Wilke
- Department of Clinical Genetics, Erasmus University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, Netherlands
| | - Marjon van Slegtenhorst
- Department of Clinical Genetics, Erasmus University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, Netherlands
| | - Suzanne Koudijs
- Department of Neurology, Erasmus University Medical Center–Sophia Children’s Hospital, P.O. Box 2040, 3000 CA Rotterdam, Netherlands
| | - Jin Yun Chen
- Neurology Department, Massachusetts General Hospital, Boston, MA, USA
| | - David Dredge
- University Children’s Hospital Salzburg, Paracelsus Medical University (PMU), Salzburg, Austria
| | - Danielle Pier
- Neurology Department, Massachusetts General Hospital, Boston, MA, USA
| | - Saskia Wortmann
- University Children’s Hospital Salzburg, Paracelsus Medical University (PMU), Salzburg, Austria
- Amalia Children’s Hospital, RadboudUMC Nijmegen, Nijmegen, Netherlands
| | - Erik-Jan Kamsteeg
- University Children’s Hospital Salzburg, Paracelsus Medical University (PMU), Salzburg, Austria
| | - Johannes Koch
- University Children’s Hospital Salzburg, Paracelsus Medical University (PMU), Salzburg, Austria
| | - Devon Haynes
- Division of Genetics, Arnold Palmer Hospital for Children–Orlando Health, Orlando, FL, USA
| | - Lynda Pollack
- Division of Genetics, Arnold Palmer Hospital for Children–Orlando Health, Orlando, FL, USA
| | - Hannah Titheradge
- West Midlands Regional Genetics Service and Birmingham Health Partners, Birmingham Women’s and Children’s NHS Trust, Birmingham B15 2TG, UK
| | - Kara Ranguin
- Department of Genetics, Reference Centre for Rare Diseases and Developmental Anomalies, Caen Hospital, Caen, France
| | - Anne-Sophie Denommé-Pichon
- Unité Fonctionnelle d’Innovation diagnostique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
- UFR Des Sciences de Santé, INSERM–Université de Bourgogne UMR1231 GAD “Génétique des Anomalies du Développement,” FHU-TRANSLAD, Dijon, France
| | - Sacha Weber
- Department of Genetics, Reference Centre for Rare Diseases and Developmental Anomalies, Caen Hospital, Caen, France
| | | | - Jaime Sánchez del Pozo
- UDISGEN (Unidad de Dismorfología y Genética) 12 de Octubre University Hospital, Madrid, Spain
| | | | - Pascal Joset
- University of Zurich, Institute of Medical Genetics, 8952 Schlieren-Zurich, Switzerland
| | - Katharina Steindl
- University of Zurich, Institute of Medical Genetics, 8952 Schlieren-Zurich, Switzerland
| | - Anita Rauch
- University of Zurich, Institute of Medical Genetics, 8952 Schlieren-Zurich, Switzerland
- University of Zurich, University Children’s Hospital Zurich, 8032 Zurich, Switzerland
- University of Zurich, URPP Adaptive Brain Circuits in Development and Learning (AdaBD), Zurich, Switzerland
- University of Zurich Research Priority Program (URPP) AdaBD: Adaptive Brain Circuits in Development and Learning, Zurich 8006, Switzerland
- University of Zurich Research Priority Program (URPP) ITINERARE: Innovative Therapies in Rare Diseases, Zurich 8006, Switzerland
| | - Davide Mei
- Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children’s Hospital, Member of ERN Epicare, University of Florence, Florence, Italy
| | - Francesco Mari
- Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children’s Hospital, Member of ERN Epicare, University of Florence, Florence, Italy
| | - Renzo Guerrini
- Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children’s Hospital, Member of ERN Epicare, University of Florence, Florence, Italy
| | - James Lespinasse
- UF de Génétique Chromosomique, Centre Hospitalier de Chambéry, Hôtel-dieu, France
| | - Frédéric Tran Mau-Them
- Unité Fonctionnelle d’Innovation diagnostique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
- UFR Des Sciences de Santé, INSERM–Université de Bourgogne UMR1231 GAD “Génétique des Anomalies du Développement,” FHU-TRANSLAD, Dijon, France
| | - Christophe Philippe
- Unité Fonctionnelle d’Innovation diagnostique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
- UFR Des Sciences de Santé, INSERM–Université de Bourgogne UMR1231 GAD “Génétique des Anomalies du Développement,” FHU-TRANSLAD, Dijon, France
| | - Benjamin Dauriat
- Service de cytogénétique et génétique médicale, Centre Hospitalier Universitaire de Limoges, France
| | - Laure Raymond
- Service de génétique, Laboratoire Eurofins Biomnis, Lyon, France
| | | | - Anna M. Cueto-González
- Hospital Vall d'Hebron, Barcelona, Spain
- Department of Clinical and Molecular Genetics, Vall d'Hebron Barcelona Hospital Campus, Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Tiong Yang Tan
- Victorian Clinical Genetics Services, Murdoch Children’s Research Institute, Melbourne, VIC, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, VIC, Australia
| | - Cyril Mignot
- AP-HP, Sorbonne Université, Département de Génétique, Paris, France
| | - Sarah Grotto
- AP-HP, Sorbonne Université, Département de Génétique, Paris, France
| | - Florence Renaldo
- AP-HP, Sorbonne Université, Département de neuropediatrie, Centre de référence neurogénétique, Hôpital Armand Trousseau, Paris, France
| | - Theodore G. Drivas
- Department of Genetics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Laura Hennessy
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Anna Raper
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Ilaria Parenti
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
| | - Frank J. Kaiser
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
- Essener Zentrum für Seltene Erkrankungen (EZSE), Universitätsklinikum Essen, Essen, Germany
| | - Alma Kuechler
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
| | - Øyvind L. Busk
- Department of Medical Genetics, Telemark Hospital Trust, 3710 Skien, Norway
| | - Lily Islam
- West Midlands Regional Genetics Service and Birmingham Health Partners, Birmingham Women’s and Children’s NHS Trust, Birmingham B15 2TG, UK
| | - Jacob A. Siedlik
- Department of Exercise Science and Pre-Health Professions, Creighton University, Omaha, NE, USA
| | | | | | | | - Rhonda E. Schnur
- GeneDx, Gaithersburg, MD, USA
- Department of Pediatrics, Division of Genetics Cooper Medical School of Rowan University Cooper University Health Care 3, Cooper Plaza, Camden, NJ, USA
| | - Antonio Vitobello
- Unité Fonctionnelle d’Innovation diagnostique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
- UFR Des Sciences de Santé, INSERM–Université de Bourgogne UMR1231 GAD “Génétique des Anomalies du Développement,” FHU-TRANSLAD, Dijon, France
| | - Siddharth Banka
- Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Elizabeth J. Bhoj
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Holly A. F. Stessman
- Stessman Laboratory, Department of Pharmacology and Neuroscience, Creighton University Medical School, Omaha, NE, USA
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6
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Beyltjens T, Boudin E, Revencu N, Boeckx N, Bertrand M, Schütz L, Haack TB, Weber A, Biliouri E, Vinkšel M, Zagožen A, Peterlin B, Pai S, Telegrafi A, Henderson LB, Ells C, Turner L, Wuyts W, Van Hul W, Hendrickx G, Mortier GR. Heterozygous pathogenic variants involving CBFB cause a new skeletal disorder resembling cleidocranial dysplasia. J Med Genet 2022; 60:498-504. [PMID: 36241386 PMCID: PMC10176335 DOI: 10.1136/jmg-2022-108739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/03/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Cleidocranial dysplasia (CCD) is a rare skeletal dysplasia with significant clinical variability. Patients with CCD typically present with delayed closure of fontanels and cranial sutures, dental anomalies, clavicular hypoplasia or aplasia and short stature. Runt-related transcription factor 2 (RUNX2) is currently the only known disease-causing gene for CCD, but several studies have suggested locus heterogeneity. METHODS The cohort consists of eight subjects from five unrelated families partially identified through GeneMatcher. Exome or genome sequencing was applied and in two subjects the effect of the variant was investigated at RNA level. RESULTS In each subject a heterozygous pathogenic variant in CBFB was detected, whereas no genomic alteration involving RUNX2 was found. Three CBFB variants (one splice site alteration, one nonsense variant, one 2 bp duplication) were shown to result in a premature stop codon. A large intragenic deletion was found to delete exon 4, without affecting CBFB expression. The effect of a second splice site variant could not be determined but most likely results in a shortened or absent protein. Affected individuals showed similarities with RUNX2-related CCD, including dental and clavicular abnormalities. Normal stature and neurocognitive problems were however distinguishing features. CBFB encodes the core-binding factor β subunit, which can interact with all RUNX proteins (RUNX1, RUNX2, RUNX3) to form heterodimeric transcription factors. This may explain the phenotypic differences between CBFB-related and RUNX2-related CCD. CONCLUSION We confirm the previously suggested locus heterogeneity for CCD by identifying five pathogenic variants in CBFB in a cohort of eight individuals with clinical and radiographic features reminiscent of CCD.
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Affiliation(s)
- Tessi Beyltjens
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Eveline Boudin
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Nicole Revencu
- Center for Human Genetics, Cliniques universitaires Saint-Luc and University of Louvain, Brussels, Belgium
| | - Nele Boeckx
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Miriam Bertrand
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Leon Schütz
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Axel Weber
- Institute of Human Genetics, Justus Liebig University, Giessen, Germany
| | - Eleni Biliouri
- Institute of Human Genetics, Justus Liebig University, Giessen, Germany
| | - Mateja Vinkšel
- Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana Division of Internal Medicine, Ljubljana, Slovenia
| | - Anja Zagožen
- Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana Division of Internal Medicine, Ljubljana, Slovenia
| | - Borut Peterlin
- Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana Division of Internal Medicine, Ljubljana, Slovenia
| | - Shashidhar Pai
- Children's Health, Division of Genetics, Medical University of South Carolina, Charleston, South Carolina, USA
| | | | | | - Courtney Ells
- Provincial Medical Genetics Program, Eastern Health, St. John's, Newfoundland, Canada
| | - Lesley Turner
- Provincial Medical Genetics Program, Eastern Health, St. John's, Newfoundland, Canada.,Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Wim Wuyts
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Wim Van Hul
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Gretl Hendrickx
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium .,Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Geert R Mortier
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium.,Department of Human Genetics, KU Leuven, Leuven, Belgium.,Center for Human Genetics, University Hospital Leuven, Leuven, Belgium
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7
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Platzer K, Sticht H, Bupp C, Ganapathi M, Pereira EM, Le Guyader G, Bilan F, Henderson LB, Lemke JR, Taschenberger H, Brose N, Jamra RA, Wojcik SM. De novo missense variants in
SLC32A1
cause a developmental and epileptic encephalopathy due to impaired
GABAergic
neurotransmission. Ann Neurol 2022; 92:958-973. [DOI: 10.1002/ana.26485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Konrad Platzer
- Institute of Human Genetics University of Leipzig Medical Center Leipzig Germany
| | - Heinrich Sticht
- Institute of Biochemistry, Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Erlangen Germany
| | - Caleb Bupp
- Spectrum Health Medical Genetics Grand Rapids MI USA
| | - Mythily Ganapathi
- Department of Pathology and Cell Biology Columbia University Medical Center New York NY USA
| | - Elaine M. Pereira
- Department of Pediatrics Columbia University Irving Medical Center New York NY USA
| | - Gwenaël Le Guyader
- Department of Genetics Poitiers University Hospital Center Poitiers Cedex France
| | - Frederic Bilan
- Department of Genetics Poitiers University Hospital Center Poitiers Cedex France
- Laboratoire de Neurosciences Expérimentales et Cliniques (LNEC) INSERM U1084 University of Poitiers Poitiers France
| | | | - Johannes R. Lemke
- Institute of Human Genetics University of Leipzig Medical Center Leipzig Germany
- Center for Rare Diseases University of Leipzig Medical Center Leipzig Germany
| | - Holger Taschenberger
- Department of Molecular Neurobiology Max Planck Institute for Multidisciplinary Sciences City Campus, Göttingen Germany
| | - Nils Brose
- Department of Molecular Neurobiology Max Planck Institute for Multidisciplinary Sciences City Campus, Göttingen Germany
| | - Rami Abou Jamra
- Institute of Human Genetics University of Leipzig Medical Center Leipzig Germany
| | - Sonja M. Wojcik
- Department of Molecular Neurobiology Max Planck Institute for Multidisciplinary Sciences City Campus, Göttingen Germany
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8
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Webb BD, Evans A, Naidich TP, M Bird L, Parikh S, Fernandez Garcia M, Henderson LB, Millan F, Si Y, Brennand KJ, Hung P, Rucker JC, Wheeler PG, Schadt EE. Haploinsufficiency of POU4F1 causes an ataxia syndrome with hypotonia and intention tremor. Hum Mutat 2021; 42:685-693. [PMID: 33783914 DOI: 10.1002/humu.24201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 11/06/2022]
Abstract
De novo, heterozygous, loss-of-function variants were identified in Pou domain, class 4, transcription factor 1 (POU4F1) via whole-exome sequencing in four independent probands presenting with ataxia, intention tremor, and hypotonia. POU4F1 is expressed in the developing nervous system, and mice homozygous for null alleles of Pou4f1 exhibit uncoordinated movements with newborns being unable to successfully right themselves to feed. Head magnetic resonance imaging of the four probands was reviewed and multiple abnormalities were noted, including significant cerebellar vermian atrophy and hypertrophic olivary degeneration in one proband. Transcriptional activation of the POU4F1 p.Gln306Arg protein was noted to be decreased when compared with wild type. These findings suggest that heterozygous, loss-of-function variants in POU4F1 are causative of a novel ataxia syndrome.
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Affiliation(s)
- Bryn D Webb
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Anthony Evans
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Thomas P Naidich
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Lynne M Bird
- Department of Pediatrics, University of California San Diego, Rady Children's Hospital, San Diego, California, USA
| | - Sumit Parikh
- Neurometabolism & Neurogenetics, Cleveland Clinic, Cleveland, Ohio, USA
| | - Meilin Fernandez Garcia
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | | | - Yue Si
- GeneDx, Gaithersburg, Maryland, USA
| | - Kristen J Brennand
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Peter Hung
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Janet C Rucker
- Department of Neurology, New York University Grossman School of Medicine, New York, New York, USA.,Department of Ophthalmology, New York University Grossman School of Medicine, New York, New York, USA
| | | | - Eric E Schadt
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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9
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Hüffmeier U, Kraus C, Reuter MS, Uebe S, Abbott MA, Ahmed SA, Rawson KL, Barr E, Li H, Bruel AL, Faivre L, Tran Mau-Them F, Botti C, Brooks S, Burns K, Ward DI, Dutra-Clarke M, Martinez-Agosto JA, Lee H, Nelson SF, Zacher P, Abou Jamra R, Klöckner C, McGaughran J, Kohlhase J, Schuhmann S, Moran E, Pappas J, Raas-Rothschild A, Sacoto MJG, Henderson LB, Palculict TB, Mullegama SV, Zghal Elloumi H, Reich A, Schrier Vergano SA, Wahl E, Reis A, Zweier C. EIF3F-related neurodevelopmental disorder: refining the phenotypic and expanding the molecular spectrum. Orphanet J Rare Dis 2021; 16:136. [PMID: 33736665 PMCID: PMC7977188 DOI: 10.1186/s13023-021-01744-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/15/2021] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND An identical homozygous missense variant in EIF3F, identified through a large-scale genome-wide sequencing approach, was reported as causative in nine individuals with a neurodevelopmental disorder, characterized by variable intellectual disability, epilepsy, behavioral problems and sensorineural hearing-loss. To refine the phenotypic and molecular spectrum of EIF3F-related neurodevelopmental disorder, we examined independent patients. RESULTS 21 patients were homozygous and one compound heterozygous for c.694T>G/p.(Phe232Val) in EIF3F. Haplotype analyses in 15 families suggested that c.694T>G/p.(Phe232Val) was a founder variant. All affected individuals had developmental delays including delayed speech development. About half of the affected individuals had behavioral problems, altered muscular tone, hearing loss, and short stature. Moreover, this study suggests that microcephaly, reduced sensitivity to pain, cleft lip/palate, gastrointestinal symptoms and ophthalmological symptoms are part of the phenotypic spectrum. Minor dysmorphic features were observed, although neither the individuals' facial nor general appearance were obviously distinctive. Symptoms in the compound heterozygous individual with an additional truncating variant were at the severe end of the spectrum in regard to motor milestones, speech delay, organic problems and pre- and postnatal growth of body and head, suggesting some genotype-phenotype correlation. CONCLUSIONS Our study refines the phenotypic and expands the molecular spectrum of EIF3F-related syndromic neurodevelopmental disorder.
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Affiliation(s)
- Ulrike Hüffmeier
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 10, 91054, Erlangen, Germany.
| | - Cornelia Kraus
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 10, 91054, Erlangen, Germany
| | - Miriam S Reuter
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 10, 91054, Erlangen, Germany
| | - Steffen Uebe
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 10, 91054, Erlangen, Germany
| | - Mary-Alice Abbott
- Medical Genetics, Department of Pediatrics, University of Massachusetts Medical School - Baystate, Springfield, MA, USA
| | - Syed A Ahmed
- Department of Genetics, Southern California Permanente Medical Group, Kaiser Permanente, Riverside, CA, USA
| | - Kristyn L Rawson
- Department of Genetics, Southern California Permanente Medical Group, Kaiser Permanente, Riverside, CA, USA
| | - Eileen Barr
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Hong Li
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Ange-Line Bruel
- UMR-Inserm 1231 GAD Team, Génétique des Anomalies du développement, Université de Bourgogne Franche-Comté, 21000, Dijon, France
- Laboratoire de Génétique Chromosomique et Moléculaire, UF Innovation en diagnostic génomique des maladies rares, Plateau de Biologie Hospitalo-Universitaire, Centre Hospitalier Universitaire de Dijon, Dijon, France
| | - Laurence Faivre
- UMR-Inserm 1231 GAD Team, Génétique des Anomalies du développement, Université de Bourgogne Franche-Comté, 21000, Dijon, France
- Centre de Génétique, Centre de Référence «Anomalies du Développement et Syndromes Malformatifs» et FHU TRANSLAD, Hôpital D'Enfants, Centre Hospitalier Universitaire de Dijon, Dijon, France
| | - Frédéric Tran Mau-Them
- UMR-Inserm 1231 GAD Team, Génétique des Anomalies du développement, Université de Bourgogne Franche-Comté, 21000, Dijon, France
- Laboratoire de Génétique Chromosomique et Moléculaire, UF Innovation en diagnostic génomique des maladies rares, Plateau de Biologie Hospitalo-Universitaire, Centre Hospitalier Universitaire de Dijon, Dijon, France
| | - Christina Botti
- Division of Medical Genetics, Department of Pediatrics, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, 08901, USA
| | - Susan Brooks
- Division of Medical Genetics, Department of Pediatrics, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, 08901, USA
| | | | | | - Marina Dutra-Clarke
- Division of Genetics, Department of Pediatrics, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
| | - Julian A Martinez-Agosto
- Division of Genetics, Department of Pediatrics, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
- Department of Human Genetics, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
| | - Hane Lee
- Department of Human Genetics, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
- Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
| | - Stanley F Nelson
- Division of Genetics, Department of Pediatrics, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
- Department of Human Genetics, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
- Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, 90095, USA
| | - Pia Zacher
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
- Epilepsy Center Kleinwachau, Radeberg, Germany
| | - Rami Abou Jamra
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Chiara Klöckner
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Julie McGaughran
- Genetic Health Queensland, Royal Brisbane and Woman's Hospital, Brisbane, Australia
- School of Medicine, The University of Queensland, St Lucia, Brisbane, Australia
| | | | - Sarah Schuhmann
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 10, 91054, Erlangen, Germany
| | - Ellen Moran
- Clinical Genetics, Hassenfeld Children's Hospital at NYU Langone, NYU Langone, Orthopedic Hospital, New York, NY, USA
| | - John Pappas
- Division of Clinical Genetic Services, Department of Pediatrics, NYU Grossman School of Medicine, New York, NY, USA
| | - Annick Raas-Rothschild
- Sackler School of Medicine at Tel Aviv University, Tel Aviv, Israel
- Institute of Rare Diseases, Edmond & Lily Safra Children Hospital, Tel Hashomer, Israel
| | | | | | | | | | | | - Adi Reich
- GeneDx, Gaithersburg, MD, 20877, USA
| | - Samantha A Schrier Vergano
- Division of Medical Genetics and Metabolism, Children's Hospital of The King's Daughters, Norfolk, VA, USA
| | - Erica Wahl
- Division of Genetics, UBMD Pediatrics, Buffalo, NY, USA
| | - André Reis
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 10, 91054, Erlangen, Germany
| | - Christiane Zweier
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 10, 91054, Erlangen, Germany
- Department of Human Genetics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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10
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Gripp KW, Smithson SF, Scurr IJ, Baptista J, Majumdar A, Pierre G, Williams M, Henderson LB, Wentzensen IM, McLaughlin H, Leeuwen L, Simon MEH, van Binsbergen E, Dinulos MBP, Kaplan JD, McRae A, Superti-Furga A, Good JM, Kutsche K. Syndromic disorders caused by gain-of-function variants in KCNH1, KCNK4, and KCNN3-a subgroup of K + channelopathies. Eur J Hum Genet 2021; 29:1384-1395. [PMID: 33594261 PMCID: PMC8440610 DOI: 10.1038/s41431-021-00818-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/18/2021] [Accepted: 01/22/2021] [Indexed: 12/13/2022] Open
Abstract
Decreased or increased activity of potassium channels caused by loss-of-function and gain-of-function (GOF) variants in the corresponding genes, respectively, underlies a broad spectrum of human disorders affecting the central nervous system, heart, kidney, and other organs. While the association of epilepsy and intellectual disability (ID) with variants affecting function in genes encoding potassium channels is well known, GOF missense variants in K+ channel encoding genes in individuals with syndromic developmental disorders have only recently been recognized. These syndromic phenotypes include Zimmermann–Laband and Temple–Baraitser syndromes, caused by dominant variants in KCNH1, FHEIG syndrome due to dominant variants in KCNK4, and the clinical picture associated with dominant variants in KCNN3. Here we review the presentation of these individuals, including five newly reported with variants in KCNH1 and three additional individuals with KCNN3 variants, all variants likely affecting function. There is notable overlap in the phenotypic findings of these syndromes associated with dominant KCNN3, KCNH1, and KCNK4 variants, sharing developmental delay and/or ID, coarse facial features, gingival enlargement, distal digital hypoplasia, and hypertrichosis. We suggest to combine the phenotypes and define a new subgroup of potassium channelopathies caused by increased K+ conductance, referred to as syndromic neurodevelopmental K+ channelopathies due to dominant variants in KCNH1, KCNK4, or KCNN3.
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Affiliation(s)
- Karen W Gripp
- Division of Medical Genetics, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Sarah F Smithson
- Department of Clinical Genetics, University Hospitals Bristol and Weston, Bristol, UK
| | - Ingrid J Scurr
- Department of Clinical Genetics, University Hospitals Bristol and Weston, Bristol, UK
| | - Julia Baptista
- Exeter Genomics Laboratory, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK.,College of Medicine and Health, University of Exeter, Exeter, UK
| | - Anirban Majumdar
- Department of Paediatric Neurology, Bristol Royal Hospital for Children, Bristol, UK
| | - Germaine Pierre
- Department of Paediatric Metabolic Medicine, Bristol Royal Hospital for Children, Bristol, UK
| | - Maggie Williams
- Bristol Genetics Laboratory, North Bristol NHS Trust, Bristol, UK
| | | | | | | | - Lisette Leeuwen
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Marleen E H Simon
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ellen van Binsbergen
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Mary Beth P Dinulos
- Section of Genetics and Child Development, Children's Hospital at Dartmouth, Lebanon, NH, USA
| | - Julie D Kaplan
- Division of Medical Genetics, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Anne McRae
- Division of Genetics, Birth Defects and Metabolism, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - Andrea Superti-Furga
- Division of Genetic Medicine, Lausanne University Hospital, Lausanne, Switzerland
| | - Jean-Marc Good
- Division of Genetic Medicine, Lausanne University Hospital, Lausanne, Switzerland
| | - Kerstin Kutsche
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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11
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Glinton KE, Hurst ACE, Bowling KM, Cristian I, Haynes D, Adstamongkonkul D, Schnappauf O, Beck DB, Brewer C, Parikh AS, Shinde DN, Donaldson A, Brautbar A, Koene S, van Haeringen A, Piton A, Capri Y, Furlan M, Gardella E, Møller RS, van de Beek I, Zuurbier L, Lakeman P, Bayat A, Martinez J, Signer R, Torring PM, Engelund MB, Gripp KW, Amlie-Wolf L, Henderson LB, Midro AT, Tarasów E, Stasiewicz-Jarocka B, Moskal-Jasinska D, Vos P, Boschann F, Stoltenburg C, Puk O, Mero IL, Lossius K, Mignot C, Keren B, Acosta Guio JC, Briceño I, Gomez A, Yang Y, Stankiewicz P. Phenotypic expansion of the BPTF-related neurodevelopmental disorder with dysmorphic facies and distal limb anomalies. Am J Med Genet A 2021; 185:1366-1378. [PMID: 33522091 PMCID: PMC8048530 DOI: 10.1002/ajmg.a.62102] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 01/06/2021] [Accepted: 01/12/2021] [Indexed: 12/14/2022]
Abstract
Neurodevelopmental disorder with dysmorphic facies and distal limb anomalies (NEDDFL), defined primarily by developmental delay/intellectual disability, speech delay, postnatal microcephaly, and dysmorphic features, is a syndrome resulting from heterozygous variants in the dosage‐sensitive bromodomain PHD finger chromatin remodeler transcription factor BPTF gene. To date, only 11 individuals with NEDDFL due to de novo BPTF variants have been described. To expand the NEDDFL phenotypic spectrum, we describe the clinical features in 25 novel individuals with 20 distinct, clinically relevant variants in BPTF, including four individuals with inherited changes in BPTF. In addition to the previously described features, individuals in this cohort exhibited mild brain abnormalities, seizures, scoliosis, and a variety of ophthalmologic complications. These results further support the broad and multi‐faceted complications due to haploinsufficiency of BPTF.
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Affiliation(s)
- Kevin E Glinton
- Department of Molecular & Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
| | - Anna C E Hurst
- Department of Genetics, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Kevin M Bowling
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, USA
| | - Ingrid Cristian
- Division of Genetics, Arnold Palmer Hospital for Children - Orlando Health, Orlando, Florida, USA
| | - Devon Haynes
- Division of Genetics, Arnold Palmer Hospital for Children - Orlando Health, Orlando, Florida, USA
| | - Dusit Adstamongkonkul
- CoxHealth, CoxHealth Pediatric Specialties, Springfield, Missouri, USA.,University of Missouri School of Medicine, Springfield Clinical Campus, Springfield, Missouri, USA
| | - Oskar Schnappauf
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - David B Beck
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Carole Brewer
- Peninsula Clinical Genetics Service, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Aditi Shah Parikh
- Center for Human Genetics, University Hospitals Cleveland Medical Center and Case Western Reserve University, Cleveland, Ohio, USA
| | - Deepali N Shinde
- Department of Clinical Genomics, Ambry Genetics, Aliso Viejo, California, USA
| | - Alan Donaldson
- Clinical Genetics, University Hospitals Bristol NHS Foundation Trust, Bristol, United Kingdom
| | - Ariel Brautbar
- Medical Genetics Department, Cook Children's Hospital, Fort Worth, Texas, USA
| | - Saskia Koene
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Arie van Haeringen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Amélie Piton
- Unité de Génétique Moléculaire Strasbourg University Hospital, 1 place de l'Hôpital, Strasbourg Cedex, France
| | - Yline Capri
- Service de Génétique Clinique, CHU Robert Debré, Paris Cedex, France
| | | | - Elena Gardella
- Danish Epilepsy Centre, Dianalund, Denmark.,University of Southern Denmark, Odense, Denmark
| | | | - Irma van de Beek
- Amsterdam UMC, University of Amsterdam, Department of Clinical Genetics, Amsterdam, the Netherlands
| | - Linda Zuurbier
- Amsterdam UMC, University of Amsterdam, Department of Clinical Genetics, Amsterdam, the Netherlands
| | - Phillis Lakeman
- Amsterdam UMC, University of Amsterdam, Department of Clinical Genetics, Amsterdam, the Netherlands
| | - Allan Bayat
- Danish Epilepsy Centre, Dianalund, Denmark.,University of Southern Denmark, Odense, Denmark.,Department of Pediatrics, University Hospital of Hvidovre, Copenhagen, Denmark
| | - Julian Martinez
- Departments of Human Genetics, Pediatrics and Psychiatry, David Geffen School of Medicine at UCLA, California, Los Angeles, USA
| | - Rebecca Signer
- Departments of Human Genetics, Pediatrics and Psychiatry, David Geffen School of Medicine at UCLA, California, Los Angeles, USA
| | - Pernille M Torring
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | | | - Karen W Gripp
- Division of Medical Genetics, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Louise Amlie-Wolf
- Division of Medical Genetics, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | | | - Alina T Midro
- Department of Clinical Genetics, Medical University, Białystok, 15-089, Białystok, Poland
| | | | | | - Diana Moskal-Jasinska
- Department of Clinical Phonoaudiology and Speech Therapy, Medical University, Białystok, Białystok, Poland
| | - Paul Vos
- Department of Pediatrics, Haga Teaching Hospital, Juliana Children's Hospital, The Hague, The Netherlands
| | - Felix Boschann
- Institut für Medizinische Genetik und Humangenetik, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Corinna Stoltenburg
- Department of Neuropaediatrics, Charité - Berlin University of Medicine, Berlin, Germany
| | - Oliver Puk
- Praxis für Humangenetik Tuebingen, Department of Genetic Diagnostics, Tuebingen, Germany
| | - Inger-Lise Mero
- Department of Medical Genetics, Oslo University Hospital, Norway
| | - Kristine Lossius
- Department of Pediatric and Adolescent Medicine, Akershus University Hospital, Norway
| | - Cyril Mignot
- APHP-Sorbonne Université, Département de Génétique, Hôpital Trousseau et Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Boris Keren
- Department of Genetics, APHP, Pitié-Salpêtrière University Hospital, Paris, France
| | - Johanna C Acosta Guio
- Especialista en Genética Médica, Instituto de Ortopedia Infantil Roosevelt, Bogotá, Cundinamarca, Colombia
| | - Ignacio Briceño
- Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, DC, Colombia
| | - Alberto Gomez
- Instituto de Genética Humana, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, DC, Colombia
| | - Yaping Yang
- Department of Molecular & Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA.,AiLife Diagnostics, Country Place Pkwy Suite 100, Pearland, Texas, USA
| | - Pawel Stankiewicz
- Department of Molecular & Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, Texas, USA
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12
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Jacobs EZ, Brown K, Byler MC, D'haenens E, Dheedene A, Henderson LB, Humberson JB, van Jaarsveld RH, Kanani F, Lebel RR, Millan F, Oegema R, Oostra A, Parker MJ, Rhodes L, Saenz M, Seaver LH, Si Y, Vanlander A, Vergult S, Callewaert B. Expanding the molecular spectrum and the neurological phenotype related to CAMTA1 variants. Clin Genet 2020; 99:259-268. [PMID: 33131045 DOI: 10.1111/cge.13874] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 10/18/2020] [Accepted: 10/28/2020] [Indexed: 12/13/2022]
Abstract
The CAMTA1-associated phenotype was initially defined in patients with intragenic deletions and duplications who showed nonprogressive congenital ataxia, with or without intellectual disability. Here, we describe 10 individuals with CAMTA1 variants: nine previously unreported (likely) pathogenic variants comprising one missense, four frameshift and four nonsense variants, and one missense variant of unknown significance. Six patients were diagnosed following whole exome sequencing and four individuals with exome-based targeted panel analysis. Most of them present with developmental delay, manifesting in speech and motor delay. Other frequent findings are hypotonia, cognitive impairment, cerebellar dysfunction, oculomotor abnormalities, and behavioral problems. Feeding problems occur more frequently than previously observed. In addition, we present a systematic review of 19 previously published individuals with causal variants, including copy number, truncating, and missense variants. We note a tendency of more severe cognitive impairment and recurrent dysmorphic features in individuals with a copy number variant. Pathogenic variants are predominantly observed in and near the N- and C- terminal functional domains. Clinical heterogeneity is observed, but 3'-terminal variants seem to associate with less pronounced cerebellar dysfunction.
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Affiliation(s)
- Eva Z Jacobs
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department for Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Kathleen Brown
- University of Colorado, Section of Genetics, Department of Pediatrics, The Children's Hospital Colorado, Aurora, Colorado, USA
| | - Melissa C Byler
- Division of Development, Behavior and Genetics, SUNY Upstate Medical University, New York, New York, USA
| | - Erika D'haenens
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department for Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Annelies Dheedene
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department for Biomolecular Medicine, Ghent University, Ghent, Belgium
| | | | - Jennifer B Humberson
- Division of Genetics, Department of Pediatrics, University of Virginia Children's Hospital, Charlottesville, Virginia, USA
| | | | - Farah Kanani
- Sheffield Children's Hospital NHS Foundation Trust, Western Bank, Sheffield, UK
| | - Robert Roger Lebel
- Division of Development, Behavior and Genetics, SUNY Upstate Medical University, New York, New York, USA
| | | | - Renske Oegema
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ann Oostra
- Department for Biomolecular Medicine, Ghent University, Ghent, Belgium.,Department of Neuropediatrics, Ghent University Hospital, Ghent, Belgium
| | - Michael J Parker
- Sheffield Children's Hospital NHS Foundation Trust, Western Bank, Sheffield, UK
| | | | - Margarita Saenz
- University of Colorado, Section of Genetics, Department of Pediatrics, The Children's Hospital Colorado, Aurora, Colorado, USA
| | - Laurie H Seaver
- Medical Genetics and Genomics, Spectrum Health Helen Devos Children's Hospital, Grand Rapids, Michigan, USA.,Department of Pediatrics and Human Development, Michigan State University College of Human Medicine, Grand Rapids, Michigan, USA
| | - Yue Si
- GeneDx, Inc. Laboratory, Gaithersburg, Maryland, USA
| | - Arnaud Vanlander
- Department for Biomolecular Medicine, Ghent University, Ghent, Belgium.,Department of Neuropediatrics, Ghent University Hospital, Ghent, Belgium
| | - Sarah Vergult
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department for Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Bert Callewaert
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department for Biomolecular Medicine, Ghent University, Ghent, Belgium
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Zech M, Jech R, Boesch S, Škorvánek M, Weber S, Wagner M, Zhao C, Jochim A, Necpál J, Dincer Y, Vill K, Distelmaier F, Stoklosa M, Krenn M, Grunwald S, Bock-Bierbaum T, Fečíková A, Havránková P, Roth J, Příhodová I, Adamovičová M, Ulmanová O, Bechyně K, Danhofer P, Veselý B, Haň V, Pavelekova P, Gdovinová Z, Mantel T, Meindl T, Sitzberger A, Schröder S, Blaschek A, Roser T, Bonfert MV, Haberlandt E, Plecko B, Leineweber B, Berweck S, Herberhold T, Langguth B, Švantnerová J, Minár M, Ramos-Rivera GA, Wojcik MH, Pajusalu S, Õunap K, Schatz UA, Pölsler L, Milenkovic I, Laccone F, Pilshofer V, Colombo R, Patzer S, Iuso A, Vera J, Troncoso M, Fang F, Prokisch H, Wilbert F, Eckenweiler M, Graf E, Westphal DS, Riedhammer KM, Brunet T, Alhaddad B, Berutti R, Strom TM, Hecht M, Baumann M, Wolf M, Telegrafi A, Person RE, Zamora FM, Henderson LB, Weise D, Musacchio T, Volkmann J, Szuto A, Becker J, Cremer K, Sycha T, Zimprich F, Kraus V, Makowski C, Gonzalez-Alegre P, Bardakjian TM, Ozelius LJ, Vetro A, Guerrini R, Maier E, Borggraefe I, Kuster A, Wortmann SB, Hackenberg A, Steinfeld R, Assmann B, Staufner C, Opladen T, Růžička E, Cohn RD, Dyment D, Chung WK, Engels H, Ceballos-Baumann A, Ploski R, Daumke O, Haslinger B, Mall V, Oexle K, Winkelmann J. Monogenic variants in dystonia: an exome-wide sequencing study. Lancet Neurol 2020; 19:908-918. [PMID: 33098801 DOI: 10.1016/s1474-4422(20)30312-4] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 07/30/2020] [Accepted: 08/10/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Dystonia is a clinically and genetically heterogeneous condition that occurs in isolation (isolated dystonia), in combination with other movement disorders (combined dystonia), or in the context of multisymptomatic phenotypes (isolated or combined dystonia with other neurological involvement). However, our understanding of its aetiology is still incomplete. We aimed to elucidate the monogenic causes for the major clinical categories of dystonia. METHODS For this exome-wide sequencing study, study participants were identified at 33 movement-disorder and neuropaediatric specialty centres in Austria, Czech Republic, France, Germany, Poland, Slovakia, and Switzerland. Each individual with dystonia was diagnosed in accordance with the dystonia consensus definition. Index cases were eligible for this study if they had no previous genetic diagnosis and no indication of an acquired cause of their illness. The second criterion was not applied to a subset of participants with a working clinical diagnosis of dystonic cerebral palsy. Genomic DNA was extracted from blood of participants and whole-exome sequenced. To find causative variants in known disorder-associated genes, all variants were filtered, and unreported variants were classified according to American College of Medical Genetics and Genomics guidelines. All considered variants were reviewed in expert round-table sessions to validate their clinical significance. Variants that survived filtering and interpretation procedures were defined as diagnostic variants. In the cases that went undiagnosed, candidate dystonia-causing genes were prioritised in a stepwise workflow. FINDINGS We sequenced the exomes of 764 individuals with dystonia and 346 healthy parents who were recruited between June 1, 2015, and July 31, 2019. We identified causative or probable causative variants in 135 (19%) of 728 families, involving 78 distinct monogenic disorders. We observed a larger proportion of individuals with diagnostic variants in those with dystonia (either isolated or combined) with coexisting non-movement disorder-related neurological symptoms (100 [45%] of 222; excepting cases with evidence of perinatal brain injury) than in those with combined (19 [19%] of 98) or isolated (16 [4%] of 388) dystonia. Across all categories of dystonia, 104 (65%) of the 160 detected variants affected genes which are associated with neurodevelopmental disorders. We found diagnostic variants in 11 genes not previously linked to dystonia, and propose a predictive clinical score that could guide the implementation of exome sequencing in routine diagnostics. In cases without perinatal sentinel events, genomic alterations contributed substantively to the diagnosis of dystonic cerebral palsy. In 15 families, we delineated 12 candidate genes. These include IMPDH2, encoding a key purine biosynthetic enzyme, for which robust evidence existed for its involvement in a neurodevelopmental disorder with dystonia. We identified six variants in IMPDH2, collected from four independent cohorts, that were predicted to be deleterious de-novo variants and expected to result in deregulation of purine metabolism. INTERPRETATION In this study, we have determined the role of monogenic variants across the range of dystonic disorders, providing guidance for the introduction of personalised care strategies and fostering follow-up pathophysiological explorations. FUNDING Else Kröner-Fresenius-Stiftung, Technische Universität München, Helmholtz Zentrum München, Medizinische Universität Innsbruck, Charles University in Prague, Czech Ministry of Education, the Slovak Grant and Development Agency, the Slovak Research and Grant Agency.
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Affiliation(s)
- Michael Zech
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany; Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Robert Jech
- Department of Neurology, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Sylvia Boesch
- Department of Neurology, Medical University Innsbruck, Innsbruck, Austria
| | - Matej Škorvánek
- Department of Neurology, Pavol Jozef Šafárik University, Košice, Slovakia; Department of Neurology, University Hospital of Louis Pasteur, Košice, Slovakia
| | - Sandrina Weber
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany; Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Matias Wagner
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany; Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Chen Zhao
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany
| | - Angela Jochim
- Klinik und Poliklinik für Neurologie, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Ján Necpál
- Department of Neurology, Zvolen Hospital, Zvolen, Slovakia
| | - Yasemin Dincer
- Lehrstuhl für Sozialpädiatrie, Technical University of Munich, Munich, Germany; Zentrum für Humangenetik und Laboratoriumsdiagnostik, Martinsried, Germany
| | - Katharina Vill
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Felix Distelmaier
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children's Hospital, Heinrich-Heine-University, Düsseldorf, Germany
| | | | - Martin Krenn
- Institute of Human Genetics, Technical University of Munich, Munich, Germany; Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Stephan Grunwald
- Crystallography, Max Delbrück Center for Molecular Medicine, Berlin, Germany; Institute of Chemistry and Biochemistry, Free University of Berlin, Berlin, Germany
| | - Tobias Bock-Bierbaum
- Crystallography, Max Delbrück Center for Molecular Medicine, Berlin, Germany; Institute of Chemistry and Biochemistry, Free University of Berlin, Berlin, Germany
| | - Anna Fečíková
- Department of Neurology, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Petra Havránková
- Department of Neurology, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Jan Roth
- Department of Neurology, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Iva Příhodová
- Department of Neurology, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Miriam Adamovičová
- Department of Paediatric Neurology, Thomayer Hospital, Prague, Czech Republic
| | - Olga Ulmanová
- Department of Neurology, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Karel Bechyně
- Department of Neurology, Hospital Písek, Pisek, Czech Republic
| | - Pavlína Danhofer
- Department of Child Neurology, Faculty of Medicine of Masaryk University Brno and University Hospital, Brno, Czech Republic
| | - Branislav Veselý
- Department of Neurology, Faculty Hospital, Constantine the Philosopher University, Nitra, Slovakia
| | - Vladimír Haň
- Department of Neurology, Pavol Jozef Šafárik University, Košice, Slovakia; Department of Neurology, University Hospital of Louis Pasteur, Košice, Slovakia
| | - Petra Pavelekova
- Department of Neurology, Pavol Jozef Šafárik University, Košice, Slovakia; Department of Neurology, University Hospital of Louis Pasteur, Košice, Slovakia
| | - Zuzana Gdovinová
- Department of Neurology, Pavol Jozef Šafárik University, Košice, Slovakia; Department of Neurology, University Hospital of Louis Pasteur, Košice, Slovakia
| | - Tobias Mantel
- Klinik und Poliklinik für Neurologie, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Tobias Meindl
- Klinik und Poliklinik für Neurologie, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Alexandra Sitzberger
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Sebastian Schröder
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Astrid Blaschek
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Timo Roser
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Michaela V Bonfert
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Edda Haberlandt
- Clinic for Pediatrics, Krankenhaus Stadt Dornbirn, Dornbirn, Austria
| | - Barbara Plecko
- Department of Pediatrics and Adolescent Medicine, Division of General Pediatrics, Medical University of Graz, Graz, Austria
| | - Birgit Leineweber
- Sozialpädiatrisches Zentrum, Klinikum Dritter Orden, Munich, Germany
| | - Steffen Berweck
- Ludwig-Maximilians-Universität München, Munich, Germany; Hospital for Neuropediatrics and Neurological Rehabilitation, Centre of Epilepsy for Children and Adolescents, Schoen Klinik Vogtareuth, Vogtareuth, Germany
| | - Thomas Herberhold
- Hospital for Neuropediatrics and Neurological Rehabilitation, Centre of Epilepsy for Children and Adolescents, Schoen Klinik Vogtareuth, Vogtareuth, Germany
| | - Berthold Langguth
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Jana Švantnerová
- Second Department of Neurology, Faculty of Medicine, Comenius University, University Hospital Bratislava, Bratislava, Slovakia
| | - Michal Minár
- Second Department of Neurology, Faculty of Medicine, Comenius University, University Hospital Bratislava, Bratislava, Slovakia
| | | | - Monica H Wojcik
- Divisions of Newborn Medicine and Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Sander Pajusalu
- Department of Clinical Genetics, Tartu University Hospital, Tartu, Estonia; Department of Clinical Genetics, University of Tartu, Tartu, Estonia; Department of Genetics, Yale School of Medicine, New Haven, CT, USA
| | - Katrin Õunap
- Department of Clinical Genetics, Tartu University Hospital, Tartu, Estonia; Department of Clinical Genetics, University of Tartu, Tartu, Estonia
| | - Ulrich A Schatz
- Institute of Human Genetics, Technical University of Munich, Munich, Germany; Institute of Human Genetics, Medical University Innsbruck, Innsbruck, Austria
| | - Laura Pölsler
- Institute of Human Genetics, Medical University Innsbruck, Innsbruck, Austria
| | - Ivan Milenkovic
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Franco Laccone
- Institute of Medical Genetics, Medical University of Vienna, Vienna, Austria
| | | | - Roberto Colombo
- Fondazione Policlinico Universitario A Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Steffi Patzer
- Klinik für Kinder-und Jugendmedizin St Elisabeth und St Barbara, Halle, Germany
| | - Arcangela Iuso
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany; Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Julia Vera
- Child Neurology Service, Hospital San Borja Arriarán, University of Chile, Santiago, Chile
| | - Monica Troncoso
- Child Neurology Service, Hospital San Borja Arriarán, University of Chile, Santiago, Chile
| | - Fang Fang
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital and Capital Medical University, Beijing, China
| | - Holger Prokisch
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany; Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Friederike Wilbert
- Department of Neuropediatrics and Muscle Disorders, University Medical Center, University of Freiburg, Freiburg im Breisgau, Germany
| | - Matthias Eckenweiler
- Department of Neuropediatrics and Muscle Disorders, University Medical Center, University of Freiburg, Freiburg im Breisgau, Germany
| | - Elisabeth Graf
- Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Dominik S Westphal
- Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Korbinian M Riedhammer
- Institute of Human Genetics, Technical University of Munich, Munich, Germany; Department of Nephrology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Theresa Brunet
- Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Bader Alhaddad
- Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Riccardo Berutti
- Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Tim M Strom
- Institute of Human Genetics, Technical University of Munich, Munich, Germany
| | - Martin Hecht
- Neurologische Klinik am Klinikum Kaufbeuren, Bezirkskliniken Schwaben, Kaufbeuren, Germany
| | - Matthias Baumann
- Department of Pediatrics, Medical University Innsbruck, Innsbruck, Austria
| | - Marc Wolf
- Neurologische Klinik, Klinikum Stuttgart, Stuttgart, Germany; Neurologische Klinik, Universitätsmedizin Mannheim, Mannheim, University of Heidelberg, Mannheim, Germany
| | | | | | | | | | - David Weise
- Klinik für Neurologie, Asklepios Fachklinikum Stadtroda, Stadtroda, Germany
| | - Thomas Musacchio
- Department of Neurology, University Hospital Würzburg, Würzburg, Germany
| | - Jens Volkmann
- Department of Neurology, University Hospital Würzburg, Würzburg, Germany
| | - Anna Szuto
- Division of Clinical and Metabolic Genetics, Hospital for Sick Children and University of Toronto, Toronto, ON, Canada; Department of Paediatrics, Hospital for Sick Children and University of Toronto, Toronto, ON, Canada
| | - Jessica Becker
- Institute of Human Genetics, University of Bonn and University Hospital Bonn, Bonn, Germany
| | - Kirsten Cremer
- Institute of Human Genetics, University of Bonn and University Hospital Bonn, Bonn, Germany
| | - Thomas Sycha
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Fritz Zimprich
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Verena Kraus
- Department of Paediatrics, School of Medicine, Technical University of Munich, Munich, Germany
| | - Christine Makowski
- Department of Paediatrics, School of Medicine, Technical University of Munich, Munich, Germany
| | - Pedro Gonzalez-Alegre
- Department of Neurology, Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA, USA
| | - Tanya M Bardakjian
- Department of Neurology, Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA, USA
| | - Laurie J Ozelius
- Department of Neurology, Massachusetts General Hospital, Charlestown, MA, USA
| | - Annalisa Vetro
- Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children's Hospital, University of Florence, Florence, Italy
| | - Renzo Guerrini
- Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children's Hospital, University of Florence, Florence, Italy
| | - Esther Maier
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Ingo Borggraefe
- Dr von Haunersches Kinderspital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Alice Kuster
- Inborn Errors of Metabolism, Pediatric Intensive Care Unit, University Hospital of Nantes, Nantes, France
| | - Saskia B Wortmann
- Institute of Human Genetics, Technical University of Munich, Munich, Germany; University Children's Hospital, Salzburger Landeskliniken and Paracelsus Medical University, Salzburg, Austria; Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Amalia Children's Hospital, Radboudumc, Nijmegen, Netherlands
| | - Annette Hackenberg
- Department of Pediatric Neurology, University Children's Hospital, Zürich, Switzerland
| | - Robert Steinfeld
- Department of Pediatric Neurology, University Children's Hospital, Zürich, Switzerland
| | - Birgit Assmann
- Division of Neuropediatrics and Metabolic Medicine, Department of General Pediatrics, University Hospital Heidelberg, Heidelberg, Germany
| | - Christian Staufner
- Division of Neuropediatrics and Metabolic Medicine, Department of General Pediatrics, University Hospital Heidelberg, Heidelberg, Germany
| | - Thomas Opladen
- Division of Neuropediatrics and Metabolic Medicine, Department of General Pediatrics, University Hospital Heidelberg, Heidelberg, Germany
| | - Evžen Růžička
- Department of Neurology, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Ronald D Cohn
- Department of Paediatrics, Hospital for Sick Children and University of Toronto, Toronto, ON, Canada; Hospital for Sick Children Research Institute, Hospital for Sick Children and University of Toronto, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - David Dyment
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON, Canada
| | - Wendy K Chung
- Department of Pediatrics and Department of Medicine, Columbia University, New York, NY, USA
| | - Hartmut Engels
- Institute of Human Genetics, University of Bonn and University Hospital Bonn, Bonn, Germany
| | | | - Rafal Ploski
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Oliver Daumke
- Crystallography, Max Delbrück Center for Molecular Medicine, Berlin, Germany; Institute of Chemistry and Biochemistry, Free University of Berlin, Berlin, Germany
| | - Bernhard Haslinger
- Klinik und Poliklinik für Neurologie, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Volker Mall
- Lehrstuhl für Sozialpädiatrie, Technical University of Munich, Munich, Germany; kbo-Kinderzentrum München, Munich, Germany
| | - Konrad Oexle
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany
| | - Juliane Winkelmann
- Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany; Institute of Human Genetics, Technical University of Munich, Munich, Germany; Lehrstuhl für Neurogenetik, Technical University of Munich, Munich, Germany; Munich Cluster for Systems Neurology, SyNergy, Munich, Germany.
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14
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Mak CCY, Doherty D, Lin AE, Vegas N, Cho MT, Viot G, Dimartino C, Weisfeld-Adams JD, Lessel D, Joss S, Li C, Gonzaga-Jauregui C, Zarate YA, Ehmke N, Horn D, Troyer C, Kant SG, Lee Y, Ishak GE, Leung G, Barone Pritchard A, Yang S, Bend EG, Filippini F, Roadhouse C, Lebrun N, Mehaffey MG, Martin PM, Apple B, Millan F, Puk O, Hoffer MJV, Henderson LB, McGowan R, Wentzensen IM, Pei S, Zahir FR, Yu M, Gibson WT, Seman A, Steeves M, Murrell JR, Luettgen S, Francisco E, Strom TM, Amlie-Wolf L, Kaindl AM, Wilson WG, Halbach S, Basel-Salmon L, Lev-El N, Denecke J, Vissers LELM, Radtke K, Chelly J, Zackai E, Friedman JM, Bamshad MJ, Nickerson DA, Reid RR, Devriendt K, Chae JH, Stolerman E, McDougall C, Powis Z, Bienvenu T, Tan TY, Orenstein N, Dobyns WB, Shieh JT, Choi M, Waggoner D, Gripp KW, Parker MJ, Stoler J, Lyonnet S, Cormier-Daire V, Viskochil D, Hoffman TL, Amiel J, Chung BHY, Gordon CT. MN1 C-terminal truncation syndrome is a novel neurodevelopmental and craniofacial disorder with partial rhombencephalosynapsis. Brain 2020; 143:55-68. [PMID: 31834374 DOI: 10.1093/brain/awz379] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/02/2019] [Accepted: 10/15/2019] [Indexed: 11/12/2022] Open
Abstract
MN1 encodes a transcriptional co-regulator without homology to other proteins, previously implicated in acute myeloid leukaemia and development of the palate. Large deletions encompassing MN1 have been reported in individuals with variable neurodevelopmental anomalies and non-specific facial features. We identified a cluster of de novo truncating mutations in MN1 in a cohort of 23 individuals with strikingly similar dysmorphic facial features, especially midface hypoplasia, and intellectual disability with severe expressive language delay. Imaging revealed an atypical form of rhombencephalosynapsis, a distinctive brain malformation characterized by partial or complete loss of the cerebellar vermis with fusion of the cerebellar hemispheres, in 8/10 individuals. Rhombencephalosynapsis has no previously known definitive genetic or environmental causes. Other frequent features included perisylvian polymicrogyria, abnormal posterior clinoid processes and persistent trigeminal artery. MN1 is encoded by only two exons. All mutations, including the recurrent variant p.Arg1295* observed in 8/21 probands, fall in the terminal exon or the extreme 3' region of exon 1, and are therefore predicted to result in escape from nonsense-mediated mRNA decay. This was confirmed in fibroblasts from three individuals. We propose that the condition described here, MN1 C-terminal truncation (MCTT) syndrome, is not due to MN1 haploinsufficiency but rather is the result of dominantly acting C-terminally truncated MN1 protein. Our data show that MN1 plays a critical role in human craniofacial and brain development, and opens the door to understanding the biological mechanisms underlying rhombencephalosynapsis.
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Affiliation(s)
- Christopher C Y Mak
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Dan Doherty
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA, USA
| | - Angela E Lin
- Medical Genetics, MassGeneral Hospital for Children, Boston, MA, USA
| | - Nancy Vegas
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
| | | | - Géraldine Viot
- Gynécologie Obstétrique, Hôpital Cochin, Hôpitaux Universitaires Paris Centre (HUPC), Assistance Publique Hôpitaux de Paris (AP-HP), Paris, France
| | - Clémantine Dimartino
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
| | - James D Weisfeld-Adams
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado-Denver School of Medicine, Aurora, CO, USA
| | - Davor Lessel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Shelagh Joss
- West of Scotland Regional Genetics Service, Queen Elizabeth University Hospital, Glasgow, UK
| | - Chumei Li
- McMaster University Medical Center, Hamilton, Ontario, Canada
| | | | - Yuri A Zarate
- Section of Genetics and Metabolism, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, Little Rock, AR, USA
| | - Nadja Ehmke
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Denise Horn
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Caitlin Troyer
- Pediatrics and Medical Genetics, University of Virginia Health System, Charlottesville, VA, USA
| | - Sarina G Kant
- Department of Clinical Genetics, Leiden University Medical Center, RC Leiden, The Netherlands
| | - Youngha Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Gisele E Ishak
- Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA, USA.,Department of Radiology, University of Washington, Seattle, WA, USA
| | - Gordon Leung
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | | | | | - Eric G Bend
- Greenwood Genetic Center, Greenwood, SC, USA.,PreventionGenetics, Marshfield, WI, USA
| | - Francesca Filippini
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
| | | | - Nicolas Lebrun
- Institut Cochin, INSERM U1016, CNRS UMR, Paris Descartes University, Paris, France
| | | | - Pierre-Marie Martin
- Institute for Human Genetics, University of California San Francisco, San Francisco, CA, USA.,Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Benjamin Apple
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado-Denver School of Medicine, Aurora, CO, USA
| | | | - Oliver Puk
- Praxis für Humangenetik Tübingen, Tübingen, Germany
| | - Mariette J V Hoffer
- Department of Clinical Genetics, Leiden University Medical Center, RC Leiden, The Netherlands
| | | | - Ruth McGowan
- West of Scotland Regional Genetics Service, Queen Elizabeth University Hospital, Glasgow, UK
| | | | - Steven Pei
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Farah R Zahir
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Mullin Yu
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - William T Gibson
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Ann Seman
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Marcie Steeves
- Medical Genetics, MassGeneral Hospital for Children, Boston, MA, USA
| | - Jill R Murrell
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Sabine Luettgen
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Tim M Strom
- Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany.,Institute of Human Genetics, Technische Universität München, Munich, Germany
| | - Louise Amlie-Wolf
- Division of Medical Genetics, A I duPont Hospital for Children/Nemours, Wilmington, DE, USA
| | - Angela M Kaindl
- Charité - Universitätsmedizin Berlin, Institute of Neuroanatomy and Cell Biology, Department of Pediatric Neurology and Center for Chronically Sick Children, Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - William G Wilson
- Pediatrics and Medical Genetics, University of Virginia Health System, Charlottesville, VA, USA
| | - Sara Halbach
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - Lina Basel-Salmon
- Raphael Recanati Genetic Institute, Rabin Medical Center-Beilinson Hospital, Petach Tikva, Israel.,Pediatric Genetics Clinic, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Felsenstein Medical Research Center, Petach Tikva, Israel
| | - Noa Lev-El
- Raphael Recanati Genetic Institute, Rabin Medical Center-Beilinson Hospital, Petach Tikva, Israel
| | - Jonas Denecke
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Lisenka E L M Vissers
- Department of Human Genetics, Donders Centre for Neuroscience, Radboud University Medical Center, HB Nijmegen, The Netherlands
| | - Kelly Radtke
- Clinical Genomics Department, Ambry Genetics, Aliso Viejo, CA, USA
| | - Jamel Chelly
- Laboratoire de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Nouvel Hôpital Civil, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, 67000 Strasbourg, France.,Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U964, CNRS UMR7104, Université de Strasbourg, 67404 Illkirch, France
| | - Elaine Zackai
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA.,Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Jan M Friedman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Michael J Bamshad
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Department of Genome Sciences, University of Washington, Seattle, WA, USA.,University of Washington Center for Mendelian Genomics, Seattle, WA, USA
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington, Seattle, WA, USA.,University of Washington Center for Mendelian Genomics, Seattle, WA, USA
| | | | - Russell R Reid
- Department of Surgery, Section of Plastic Surgery, University of Chicago, Chicago, IL, USA
| | - Koenraad Devriendt
- Department of Human Genetics, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Jong-Hee Chae
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | | | - Carey McDougall
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Zöe Powis
- Clinical Genomics Department, Ambry Genetics, Aliso Viejo, CA, USA
| | - Thierry Bienvenu
- Institut Cochin, INSERM U1016, CNRS UMR, Paris Descartes University, Paris, France.,Laboratoire de Génétique et Biologie Moléculaires, Hôpital Cochin, HUPC, AP-HP, 75014 Paris, France
| | - Tiong Y Tan
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Department of Paediatrics, University of Melbourne, Melbourne, 3052, Australia
| | - Naama Orenstein
- Pediatric Genetics Clinic, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - William B Dobyns
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA, USA.,Department of Neurology, University of Washington, Seattle, WA, USA
| | - Joseph T Shieh
- Institute for Human Genetics, University of California San Francisco, San Francisco, CA, USA.,Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Murim Choi
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Darrel Waggoner
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - Karen W Gripp
- Division of Medical Genetics, A I duPont Hospital for Children/Nemours, Wilmington, DE, USA
| | - Michael J Parker
- Sheffield Clinical Genetics Service, Sheffield Children's Hospital, Sheffield S10 2TH, UK
| | - Joan Stoler
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Stanislas Lyonnet
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Valérie Cormier-Daire
- Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France.,Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, Institut Imagine, 75015 Paris, France
| | - David Viskochil
- Division of Medical Genetics, University of Utah, Salt Lake City, UT, USA
| | - Trevor L Hoffman
- Southern California Kaiser Permanente Medical Group, Anaheim, CA, USA
| | - Jeanne Amiel
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Brian H Y Chung
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Christopher T Gordon
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
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15
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Manole A, Efthymiou S, O'Connor E, Mendes MI, Jennings M, Maroofian R, Davagnanam I, Mankad K, Lopez MR, Salpietro V, Harripaul R, Badalato L, Walia J, Francklyn CS, Athanasiou-Fragkouli A, Sullivan R, Desai S, Baranano K, Zafar F, Rana N, Ilyas M, Horga A, Kara M, Mattioli F, Goldenberg A, Griffin H, Piton A, Henderson LB, Kara B, Aslanger AD, Raaphorst J, Pfundt R, Portier R, Shinawi M, Kirby A, Christensen KM, Wang L, Rosti RO, Paracha SA, Sarwar MT, Jenkins D, Ahmed J, Santoni FA, Ranza E, Iwaszkiewicz J, Cytrynbaum C, Weksberg R, Wentzensen IM, Guillen Sacoto MJ, Si Y, Telegrafi A, Andrews MV, Baldridge D, Gabriel H, Mohr J, Oehl-Jaschkowitz B, Debard S, Senger B, Fischer F, van Ravenwaaij C, Fock AJM, Stevens SJC, Bähler J, Nasar A, Mantovani JF, Manzur A, Sarkozy A, Smith DEC, Salomons GS, Ahmed ZM, Riazuddin S, Riazuddin S, Usmani MA, Seibt A, Ansar M, Antonarakis SE, Vincent JB, Ayub M, Grimmel M, Jelsig AM, Hjortshøj TD, Karstensen HG, Hummel M, Haack TB, Jamshidi Y, Distelmaier F, Horvath R, Gleeson JG, Becker H, Mandel JL, Koolen DA, Houlden H. De Novo and Bi-allelic Pathogenic Variants in NARS1 Cause Neurodevelopmental Delay Due to Toxic Gain-of-Function and Partial Loss-of-Function Effects. Am J Hum Genet 2020; 107:311-324. [PMID: 32738225 PMCID: PMC7413890 DOI: 10.1016/j.ajhg.2020.06.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/23/2020] [Indexed: 12/19/2022] Open
Abstract
Aminoacyl-tRNA synthetases (ARSs) are ubiquitous, ancient enzymes that charge amino acids to cognate tRNA molecules, the essential first step of protein translation. Here, we describe 32 individuals from 21 families, presenting with microcephaly, neurodevelopmental delay, seizures, peripheral neuropathy, and ataxia, with de novo heterozygous and bi-allelic mutations in asparaginyl-tRNA synthetase (NARS1). We demonstrate a reduction in NARS1 mRNA expression as well as in NARS1 enzyme levels and activity in both individual fibroblasts and induced neural progenitor cells (iNPCs). Molecular modeling of the recessive c.1633C>T (p.Arg545Cys) variant shows weaker spatial positioning and tRNA selectivity. We conclude that de novo and bi-allelic mutations in NARS1 are a significant cause of neurodevelopmental disease, where the mechanism for de novo variants could be toxic gain-of-function and for recessive variants, partial loss-of-function.
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Affiliation(s)
- Andreea Manole
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Stephanie Efthymiou
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Emer O'Connor
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Marisa I Mendes
- Metabolic Unit, Department of Clinical Chemistry, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam Gastroenterology and Metabolism, Amsterdam, 1081 the Netherlands
| | - Matthew Jennings
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, CB2 0QQ UK
| | - Reza Maroofian
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Indran Davagnanam
- Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Kshitij Mankad
- Department of Neuroradiology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Maria Rodriguez Lopez
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London (UCL), London, WC1E 6BT, UK
| | - Vincenzo Salpietro
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Ricardo Harripaul
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, ON, M5T 1R8, Canada; Institute of Medical Science and Department of Psychiatry, University of Toronto, Toronto, ON, M5T 1R8, Canada
| | - Lauren Badalato
- Department of Pediatrics, Queen's University, Kingston, ON, K7L 2V7, Canada
| | - Jagdeep Walia
- Department of Pediatrics, Queen's University, Kingston, ON, K7L 2V7, Canada
| | - Christopher S Francklyn
- Department of Biochemistry, University of Vermont College of Medicine, Burlington, VT 05405, USA
| | - Alkyoni Athanasiou-Fragkouli
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Roisin Sullivan
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Sonal Desai
- Department of Neurology and Pediatrics, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Kristin Baranano
- Department of Neurology and Pediatrics, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Faisal Zafar
- Department of Pediatrics, Multan Hospital, Multan, 60000, Pakistan
| | - Nuzhat Rana
- Department of Pediatrics, Multan Hospital, Multan, 60000, Pakistan
| | | | - Alejandro Horga
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Majdi Kara
- Department of Pediatrics, Tripoli Children's Hospital, Tripoli, Libya
| | - Francesca Mattioli
- Institute for Genetics and Molecular and Cellular Biology (IGBMC), University of Strasbourg, CNRS UMR7104, INSERM U1258, Illkirch, 67404, France
| | - Alice Goldenberg
- Département de Génétique, centre de référence anomalies du développement et syndromes malformatifs, CHU de Rouen, Inserm U1245, UNIROUEN, Normandie Université, Centre Normand de Génomique et de Médecine Personnalisée, Rouen, 76031, France
| | - Helen Griffin
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, CB2 0QQ UK
| | - Amelie Piton
- Institute for Genetics and Molecular and Cellular Biology (IGBMC), University of Strasbourg, CNRS UMR7104, INSERM U1258, Illkirch, 67404, France
| | | | | | | | - Joost Raaphorst
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500HB Nijmegen, the Netherlands; Department of Neurology, Amsterdam Neuroscience Institute, Amsterdam University Medical Center, 1105AZ Amsterdam, the Netherlands
| | - Rolph Pfundt
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500HB Nijmegen, the Netherlands
| | - Ruben Portier
- Department of Neurology, Medisch Spectrum Twente, 7512KZ Enschede, the Netherlands
| | - Marwan Shinawi
- Department of Pediatrics, Divisions of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Amelia Kirby
- Division of Medical Genetics, SSM Health Cardinal Glennon Children's Hospital, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Katherine M Christensen
- Division of Medical Genetics, SSM Health Cardinal Glennon Children's Hospital, Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Lu Wang
- Howard Hughes Medical Institute, University of California San Diego and Rady Children's Hospital, La Jolla, CA 92130, USA
| | - Rasim O Rosti
- Howard Hughes Medical Institute, University of California San Diego and Rady Children's Hospital, La Jolla, CA 92130, USA
| | - Sohail A Paracha
- Institute of Basic Medical Sciences, Khyber Medical University, 25100 Peshawar, Pakistan
| | - Muhammad T Sarwar
- Institute of Basic Medical Sciences, Khyber Medical University, 25100 Peshawar, Pakistan
| | - Dagan Jenkins
- Institute of Child Health, Guilford Street and Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Jawad Ahmed
- Institute of Basic Medical Sciences, Khyber Medical University, 25100 Peshawar, Pakistan
| | - Federico A Santoni
- Department of Genetic Medicine and Development, University of Geneva, 1206 Geneva, Switzerland; Department of Endocrinology, Diabetes, and Metabolism, University Hospital of Lausanne, 1011 Lausanne, Switzerland
| | - Emmanuelle Ranza
- Department of Genetic Medicine and Development, University of Geneva, 1206 Geneva, Switzerland; Service of Genetic Medicine, University Hospitals of Geneva, 1205 Geneva, Switzerland; Medigenome, The Swiss Institute of Genomic Medicine, Geneva, CH-1207, Switzerland
| | - Justyna Iwaszkiewicz
- Swiss Institute of Bioinformatics, Molecular Modeling Group, Batiment Genopode, Unil Sorge, Lausanne, CH-1015, Switzerland
| | - Cheryl Cytrynbaum
- Hospital for Sick Children, Division of Clinical and Metabolic Genetics, 555 University Ave., Toronto, M5G 1X8, Canada
| | - Rosanna Weksberg
- Hospital for Sick Children, Division of Clinical and Metabolic Genetics, 555 University Ave., Toronto, M5G 1X8, Canada
| | | | | | - Yue Si
- GeneDx, 207 Perry Parkway Gaithersburg, MD 20877, USA
| | | | - Marisa V Andrews
- Department of Pediatrics, Divisions of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Dustin Baldridge
- Department of Pediatrics, Divisions of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Heinz Gabriel
- CeGaT GmbH and Praxis für Humangenetik Tuebingen, Tuebingen, 72076, Germany
| | - Julia Mohr
- CeGaT GmbH and Praxis für Humangenetik Tuebingen, Tuebingen, 72076, Germany
| | | | - Sylvain Debard
- University of Strasbourg, CNRS, GMGM UMR 7156, Strasbourg, 67083, France
| | - Bruno Senger
- University of Strasbourg, CNRS, GMGM UMR 7156, Strasbourg, 67083, France
| | - Frédéric Fischer
- University of Strasbourg, CNRS, GMGM UMR 7156, Strasbourg, 67083, France
| | - Conny van Ravenwaaij
- University of Groningen, University Medical Center Groningen, Department of Neurology, Groningen, 9713, the Netherlands
| | - Annemarie J M Fock
- University of Groningen, University Medical Center Groningen, Department of Neurology, Groningen, 9713, the Netherlands
| | - Servi J C Stevens
- Department of Clinical Genetics, Maastricht University Medical Centre, Maastricht, 6211, the Netherlands
| | - Jürg Bähler
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London (UCL), London, WC1E 6BT, UK
| | - Amina Nasar
- Department of Pediatrics, Queen's University, Kingston, ON, K7L 2V7, Canada
| | - John F Mantovani
- Division of Child Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Adnan Manzur
- Institute of Child Health, Guilford Street and Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Anna Sarkozy
- Institute of Child Health, Guilford Street and Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Desirée E C Smith
- Metabolic Unit, Department of Clinical Chemistry, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam Gastroenterology and Metabolism, Amsterdam, 1081 the Netherlands
| | - Gajja S Salomons
- Metabolic Unit, Department of Clinical Chemistry, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam Gastroenterology and Metabolism, Amsterdam, 1081 the Netherlands
| | - Zubair M Ahmed
- Department of Biochemistry and Molecular Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Shaikh Riazuddin
- Jinnah Burn and Reconstructive Surgery Center, Allama Iqbal Medical College, University of Health Sciences, Lahore 54550, Pakistan
| | - Saima Riazuddin
- Department of Biochemistry and Molecular Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Muhammad A Usmani
- Department of Biochemistry and Molecular Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Annette Seibt
- Department of General Pediatrics, Heinrich-Heine-University, Moorenstr. 5, 40225 Düsseldorf, Germany
| | - Muhammad Ansar
- Department of Genetic Medicine and Development, University of Geneva, 1206 Geneva, Switzerland; Institute of Molecular and Clinical Ophthalmology Basel, Basel Switzerland
| | - Stylianos E Antonarakis
- Department of Genetic Medicine and Development, University of Geneva, 1206 Geneva, Switzerland; Service of Genetic Medicine, University Hospitals of Geneva, 1205 Geneva, Switzerland; iGE3 Institute of Genetics and Genomics of Geneva, 1211 Geneva, Switzerland
| | - John B Vincent
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, ON, M5T 1R8, Canada; Institute of Medical Science and Department of Psychiatry, University of Toronto, Toronto, ON, M5T 1R8, Canada
| | - Muhammad Ayub
- Department of Pediatrics, Queen's University, Kingston, ON, K7L 2V7, Canada
| | - Mona Grimmel
- Institute of Medical Genetics and Applied Genomics, University of Tuebingen, 72076 Tübingen, Germany
| | - Anne Marie Jelsig
- Department of Clinical Genetics, University Hospital of Copenhagen, Rigshospitalet, 2100, Denmark
| | - Tina Duelund Hjortshøj
- Department of Clinical Genetics, University Hospital of Copenhagen, Rigshospitalet, 2100, Denmark
| | - Helena Gásdal Karstensen
- Department of Clinical Genetics, University Hospital of Copenhagen, Rigshospitalet, 2100, Denmark
| | - Marybeth Hummel
- Department of Pediatrics, Section of Medical Genetics, West Virginia University, Morgantown, WV 26506-9600, USA
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tuebingen, 72076 Tübingen, Germany; Centre for Rare Diseases, University of Tuebingen, 72076 Tübingen, Germany
| | - Yalda Jamshidi
- Genetics Centre, Molecular and Clinical Sciences Institute, St George's University of London, London, SW17 0RE, UK
| | - Felix Distelmaier
- Department of General Pediatrics, Heinrich-Heine-University, Moorenstr. 5, 40225 Düsseldorf, Germany
| | - Rita Horvath
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, CB2 0QQ UK
| | - Joseph G Gleeson
- Howard Hughes Medical Institute, University of California San Diego and Rady Children's Hospital, La Jolla, CA 92130, USA
| | - Hubert Becker
- University of Strasbourg, CNRS, GMGM UMR 7156, Strasbourg, 67083, France
| | - Jean-Louis Mandel
- Institute for Genetics and Molecular and Cellular Biology (IGBMC), University of Strasbourg, CNRS UMR7104, INSERM U1258, Illkirch, 67404, France
| | - David A Koolen
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500HB Nijmegen, the Netherlands
| | - Henry Houlden
- Department of Neuromuscular Disorders, University College London (UCL) Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
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16
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Tolchin D, Yeager JP, Prasad P, Dorrani N, Russi AS, Martinez-Agosto JA, Haseeb A, Angelozzi M, Santen G, Ruivenkamp C, Mercimek-Andrews S, Depienne C, Kuechler A, Mikat B, Ludecke HJ, Bilan F, Le Guyader G, Gilbert-Dussardier B, Keren B, Heide S, Haye D, Van Esch H, Keldermans L, Ortiz D, Lancaster E, Krantz ID, Krock BL, Pechter KB, Arkader A, Medne L, DeChene ET, Calpena E, Melistaccio G, Wilkie AO, Suri M, Foulds N, Begtrup A, Henderson LB, Forster C, Reed P, McDonald MT, McConkie-Rosell A, Thevenon J, Le Tanno P, Coutton C, Tsai AC, Stewart S, Maver A, Gorazd R, Pichon O, Nizon M, Cogné B, Isidor B, Martin-Coignard D, Stoeva R, Lefebvre V, Le Caignec C, Ambrose J, Bleda M, Boardman-Pretty F, Boissiere J, Boustred C, Caulfield M, Chan G, Craig C, Daugherty L, de Burca A, Devereau A, Elgar G, Foulger R, Fowler T, Furió-Tarí P, Hackett J, Halai D, Holman J, Hubbard T, Kasperaviciute D, Kayikci M, Lahnstein L, Lawson K, Leigh S, Leong I, Lopez F, Maleady-Crowe F, Mason J, McDonagh E, Moutsianas L, Mueller M, Need A, Odhams C, Patch C, Perez-Gil D, Polychronopoulos D, Pullinger J, Rahim T, Rendon A, Rogers T, Ryten M, Savage K, Scott R, Siddiq A, Sieghart A, Smedley D, Smith K, Sosinsky A, Spooner W, Stevens H, Stuckey A, Thomas E, Thompson S, Tregidgo C, Tucci A, Walsh E, Watters S, Welland M, Williams E, Witkowska K, Wood S, Zarowiecki M. De Novo SOX6 Variants Cause a Neurodevelopmental Syndrome Associated with ADHD, Craniosynostosis, and Osteochondromas. Am J Hum Genet 2020; 106:830-845. [PMID: 32442410 DOI: 10.1016/j.ajhg.2020.04.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/24/2020] [Indexed: 12/21/2022] Open
Abstract
SOX6 belongs to a family of 20 SRY-related HMG-box-containing (SOX) genes that encode transcription factors controlling cell fate and differentiation in many developmental and adult processes. For SOX6, these processes include, but are not limited to, neurogenesis and skeletogenesis. Variants in half of the SOX genes have been shown to cause severe developmental and adult syndromes, referred to as SOXopathies. We here provide evidence that SOX6 variants also cause a SOXopathy. Using clinical and genetic data, we identify 19 individuals harboring various types of SOX6 alterations and exhibiting developmental delay and/or intellectual disability; the individuals are from 17 unrelated families. Additional, inconstant features include attention-deficit/hyperactivity disorder (ADHD), autism, mild facial dysmorphism, craniosynostosis, and multiple osteochondromas. All variants are heterozygous. Fourteen are de novo, one is inherited from a mosaic father, and four offspring from two families have a paternally inherited variant. Intragenic microdeletions, balanced structural rearrangements, frameshifts, and nonsense variants are predicted to inactivate the SOX6 variant allele. Four missense variants occur in residues and protein regions highly conserved evolutionarily. These variants are not detected in the gnomAD control cohort, and the amino acid substitutions are predicted to be damaging. Two of these variants are located in the HMG domain and abolish SOX6 transcriptional activity in vitro. No clear genotype-phenotype correlations are found. Taken together, these findings concur that SOX6 haploinsufficiency leads to a neurodevelopmental SOXopathy that often includes ADHD and abnormal skeletal and other features.
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17
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Efthymiou S, Salpietro V, Malintan N, Poncelet M, Kriouile Y, Fortuna S, De Zorzi R, Payne K, Henderson LB, Cortese A, Maddirevula S, Alhashmi N, Wiethoff S, Ryten M, Botia JA, Provitera V, Schuelke M, Vandrovcova J, Walsh L, Torti E, Iodice V, Najafi M, Karimiani EG, Maroofian R, Siquier-Pernet K, Boddaert N, De Lonlay P, Cantagrel V, Aguennouz M, El Khorassani M, Schmidts M, Alkuraya FS, Edvardson S, Nolano M, Devaux J, Houlden H. Biallelic mutations in neurofascin cause neurodevelopmental impairment and peripheral demyelination. Brain 2019; 142:2948-2964. [PMID: 31501903 PMCID: PMC6763744 DOI: 10.1093/brain/awz248] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 05/19/2019] [Accepted: 06/18/2019] [Indexed: 12/13/2022] Open
Abstract
Axon pathfinding and synapse formation are essential processes for nervous system development and function. The assembly of myelinated fibres and nodes of Ranvier is mediated by a number of cell adhesion molecules of the immunoglobulin superfamily including neurofascin, encoded by the NFASC gene, and its alternative isoforms Nfasc186 and Nfasc140 (located in the axonal membrane at the node of Ranvier) and Nfasc155 (a glial component of the paranodal axoglial junction). We identified 10 individuals from six unrelated families, exhibiting a neurodevelopmental disorder characterized with a spectrum of central (intellectual disability, developmental delay, motor impairment, speech difficulties) and peripheral (early onset demyelinating neuropathy) neurological involvement, who were found by exome or genome sequencing to carry one frameshift and four different homozygous non-synonymous variants in NFASC. Expression studies using immunostaining-based techniques identified absent expression of the Nfasc155 isoform as a consequence of the frameshift variant and a significant reduction of expression was also observed in association with two non-synonymous variants affecting the fibronectin type III domain. Cell aggregation studies revealed a severely impaired Nfasc155-CNTN1/CASPR1 complex interaction as a result of the identified variants. Immunofluorescence staining of myelinated fibres from two affected individuals showed a severe loss of myelinated fibres and abnormalities in the paranodal junction morphology. Our results establish that recessive variants affecting the Nfasc155 isoform can affect the formation of paranodal axoglial junctions at the nodes of Ranvier. The genetic disease caused by biallelic NFASC variants includes neurodevelopmental impairment and a spectrum of central and peripheral demyelination as part of its core clinical phenotype. Our findings support possible overlapping molecular mechanisms of paranodal damage at peripheral nerves in both the immune-mediated and the genetic disease, but the observation of prominent central neurological involvement in NFASC biallelic variant carriers highlights the importance of this gene in human brain development and function.
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Affiliation(s)
- Stephanie Efthymiou
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, UK
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London, UK
| | - Vincenzo Salpietro
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, UK
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London, UK
| | - Nancy Malintan
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London, UK
| | - Mallory Poncelet
- INSERM U1051, Institut de Neurosciences de Montpellier (INM), Université de Montpellier, Montpellier, France
| | - Yamna Kriouile
- Unit of Neuropediatrics and Neurometabolism, Pediatric Department 2, Rabat Children's Hospital, and Faculty of Medicine and Pharmacy of Rabat, University Mohammed V of Rabat, Morocco
| | - Sara Fortuna
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Rita De Zorzi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Katelyn Payne
- Riley Hospital for Children, Indianapolis, Indiana, IN, USA
| | | | - Andrea Cortese
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, UK
| | - Sateesh Maddirevula
- Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Nadia Alhashmi
- Department of Genetics, College of Medicine, Sultan Qaboos University, Sultanate of Oman
| | - Sarah Wiethoff
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, UK
- Center for Neurology and Hertie Institute for Clinical Brain Research, Eberhard Karls-University, Tübingen, Germany
| | - Mina Ryten
- Department of Neurodegenerative Diseases, UCL Institute of Neurology, Queen Square, London, UK
| | - Juan A Botia
- Department of Neurodegenerative Diseases, UCL Institute of Neurology, Queen Square, London, UK
- Departamento de Ingeniería de la Información y las Comunicaciones, Universidad de Murcia, Murcia, E, Spain
| | - Vincenzo Provitera
- Department of Neurology, Istituti Clinici Scientifici Maugeri IRCCS, Italy
| | - Markus Schuelke
- Department of Neuropediatrics, Charité Universitätsmedizin Berlin, Germany
| | - Jana Vandrovcova
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, UK
| | - Laurence Walsh
- Riley Hospital for Children, Indianapolis, Indiana, IN, USA
| | | | - Valeria Iodice
- Department of Brain Repair and Rehabilitation, Institute of Neurology, University College London, UK
- Autonomic Unit, National Hospital Neurology and Neurosurgery, UCL NHS Trust, London, UK
| | - Maryam Najafi
- Genome Research Division, Human Genetics Department, Radboud University Medical Center, Geert Grooteplein Zuid 10, Nijmegen, The Netherlands
| | - Ehsan Ghayoor Karimiani
- Genetics Research Centre, Molecular and Clinical Sciences Institute, St George's, University of London, Cranmer Terrace, London, UK
| | - Reza Maroofian
- Genetics Research Centre, Molecular and Clinical Sciences Institute, St George's, University of London, Cranmer Terrace, London, UK
| | - Karine Siquier-Pernet
- Paris Descartes - Sorbonne Paris Cité University, Imagine Institute, Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Nathalie Boddaert
- Paris Descartes - Sorbonne Paris Cité University, Imagine Institute, Paris, France
- Department of Pediatric Radiology, Necker Enfants Malades University Hospital, APHP, Paris, France
| | - Pascale De Lonlay
- Paris Descartes - Sorbonne Paris Cité University, Imagine Institute, Paris, France
- Inserm, U1151, Institut Necker-Enfants Malades, Paris, France
| | - Vincent Cantagrel
- Paris Descartes - Sorbonne Paris Cité University, Imagine Institute, Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Mhammed Aguennouz
- Department of Clinical and Experimental Medicine, University of Messina, Sicily
| | - Mohamed El Khorassani
- Unit of Neuropediatrics and Neurometabolism, Pediatric Department 2, Rabat Children's Hospital, and Faculty of Medicine and Pharmacy of Rabat, University Mohammed V of Rabat, Morocco
| | - Miriam Schmidts
- Genome Research Division, Human Genetics Department, Radboud University Medical Center, Geert Grooteplein Zuid 10, Nijmegen, The Netherlands
- Center for Pediatrics and Adolescent Medicine, University Hospital Freiburg, Freiburg University, Faculty of Medicine, Mathildenstrasse 1, Freiburg, Germany
| | - Fowzan S Alkuraya
- Department of Anatomy and Cell Biology, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Simon Edvardson
- Paediatric Neurology Unit, Hadassah Medical Center, Jerusalem, Israel
| | - Maria Nolano
- Department of Neurology, Istituti Clinici Scientifici Maugeri IRCCS, Italy
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University "Federico II" of Naples, Italy
| | - Jérôme Devaux
- INSERM U1051, Institut de Neurosciences de Montpellier (INM), Université de Montpellier, Montpellier, France
| | - Henry Houlden
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, UK
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Palmer EE, Hong S, Al Zahrani F, Hashem MO, Aleisa FA, Jalal Ahmed HM, Kandula T, Macintosh R, Minoche AE, Puttick C, Gayevskiy V, Drew AP, Cowley MJ, Dinger M, Rosenfeld JA, Xiao R, Cho MT, Yakubu SF, Henderson LB, Guillen Sacoto MJ, Begtrup A, Hamad M, Shinawi M, Andrews MV, Jones MC, Lindstrom K, Bristol RE, Kayani S, Snyder M, Villanueva MM, Schteinschnaider A, Faivre L, Thauvin C, Vitobello A, Roscioli T, Kirk EP, Bye A, Merzaban J, Jaremko Ł, Jaremko M, Sachdev RK, Alkuraya FS, Arold ST. De Novo Variants Disrupting the HX Repeat Motif of ATN1 Cause a Recognizable Non-progressive Neurocognitive Syndrome. Am J Hum Genet 2019; 104:778. [PMID: 30929740 DOI: 10.1016/j.ajhg.2019.03.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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19
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Palmer EE, Hong S, Al Zahrani F, Hashem MO, Aleisa FA, Ahmed HMJ, Kandula T, Macintosh R, Minoche AE, Puttick C, Gayevskiy V, Drew AP, Cowley MJ, Dinger M, Rosenfeld JA, Xiao R, Cho MT, Yakubu SF, Henderson LB, Guillen Sacoto MJ, Begtrup A, Hamad M, Shinawi M, Andrews MV, Jones MC, Lindstrom K, Bristol RE, Kayani S, Snyder M, Villanueva MM, Schteinschnaider A, Faivre L, Thauvin C, Vitobello A, Roscioli T, Kirk EP, Bye A, Merzaban J, Jaremko Ł, Jaremko M, Sachdev RK, Alkuraya FS, Arold ST. De Novo Variants Disrupting the HX Repeat Motif of ATN1 Cause a Recognizable Non-Progressive Neurocognitive Syndrome. Am J Hum Genet 2019; 104:542-552. [PMID: 30827498 DOI: 10.1016/j.ajhg.2019.01.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 01/23/2019] [Indexed: 01/15/2023] Open
Abstract
Polyglutamine expansions in the transcriptional co-repressor Atrophin-1, encoded by ATN1, cause the neurodegenerative condition dentatorubral-pallidoluysian atrophy (DRPLA) via a proposed novel toxic gain of function. We present detailed phenotypic information on eight unrelated individuals who have de novo missense and insertion variants within a conserved 16-amino-acid "HX repeat" motif of ATN1. Each of the affected individuals has severe cognitive impairment and hypotonia, a recognizable facial gestalt, and variable congenital anomalies. However, they lack the progressive symptoms typical of DRPLA neurodegeneration. To distinguish this subset of affected individuals from the DRPLA diagnosis, we suggest using the term CHEDDA (congenital hypotonia, epilepsy, developmental delay, digit abnormalities) to classify the condition. CHEDDA-related variants alter the particular structural features of the HX repeat motif, suggesting that CHEDDA results from perturbation of the structural and functional integrity of the HX repeat. We found several non-homologous human genes containing similar motifs of eight to 10 HX repeat sequences, including RERE, where disruptive variants in this motif have also been linked to a separate condition that causes neurocognitive and congenital anomalies. These findings suggest that perturbation of the HX motif might explain other Mendelian human conditions.
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Gennarino VA, Palmer EE, McDonell LM, Wang L, Adamski CJ, Koire A, See L, Chen CA, Schaaf CP, Rosenfeld JA, Panzer JA, Moog U, Hao S, Bye A, Kirk EP, Stankiewicz P, Breman AM, McBride A, Kandula T, Dubbs HA, Macintosh R, Cardamone M, Zhu Y, Ying K, Dias KR, Cho MT, Henderson LB, Baskin B, Morris P, Tao J, Cowley MJ, Dinger ME, Roscioli T, Caluseriu O, Suchowersky O, Sachdev RK, Lichtarge O, Tang J, Boycott KM, Holder JL, Zoghbi HY. A Mild PUM1 Mutation Is Associated with Adult-Onset Ataxia, whereas Haploinsufficiency Causes Developmental Delay and Seizures. Cell 2019; 172:924-936.e11. [PMID: 29474920 DOI: 10.1016/j.cell.2018.02.006] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 08/23/2017] [Accepted: 02/01/2018] [Indexed: 02/06/2023]
Abstract
Certain mutations can cause proteins to accumulate in neurons, leading to neurodegeneration. We recently showed, however, that upregulation of a wild-type protein, Ataxin1, caused by haploinsufficiency of its repressor, the RNA-binding protein Pumilio1 (PUM1), also causes neurodegeneration in mice. We therefore searched for human patients with PUM1 mutations. We identified eleven individuals with either PUM1 deletions or de novo missense variants who suffer a developmental syndrome (Pumilio1-associated developmental disability, ataxia, and seizure; PADDAS). We also identified a milder missense mutation in a family with adult-onset ataxia with incomplete penetrance (Pumilio1-related cerebellar ataxia, PRCA). Studies in patient-derived cells revealed that the missense mutations reduced PUM1 protein levels by ∼25% in the adult-onset cases and by ∼50% in the infantile-onset cases; levels of known PUM1 targets increased accordingly. Changes in protein levels thus track with phenotypic severity, and identifying posttranscriptional modulators of protein expression should identify new candidate disease genes.
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Affiliation(s)
- Vincenzo A Gennarino
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA.
| | - Elizabeth E Palmer
- Sydney Children's Hospital, Randwick, NSW 2031, Australia; School of Women's and Children's Health, UNSW Medicine, The University of New South Wales, NSW 2031, Australia; Genetics of Learning Disability Service, Waratah, NSW 2298, Australia
| | - Laura M McDonell
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON K1H 8L1, Canada
| | - Li Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA
| | - Carolyn J Adamski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA; Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA
| | - Amanda Koire
- Program in Quantitative and Computational Biosciences, Baylor College of Medicine, Houston, TX 77030, USA
| | - Lauren See
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Chun-An Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA
| | - Christian P Schaaf
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jessica A Panzer
- Department of Pediatrics, Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA; Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ute Moog
- Institute of Human Genetics, Heidelberg University, Im Neuenheimer Feld 440, 69120 Heidelberg, Germany
| | - Shuang Hao
- Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA; Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ann Bye
- Sydney Children's Hospital, Randwick, NSW 2031, Australia; School of Women's and Children's Health, UNSW Medicine, The University of New South Wales, NSW 2031, Australia
| | - Edwin P Kirk
- Sydney Children's Hospital, Randwick, NSW 2031, Australia; School of Women's and Children's Health, UNSW Medicine, The University of New South Wales, NSW 2031, Australia; Genetics Laboratory, NSW Health Pathology East Randwick, Sydney, NSW, Australia
| | - Pawel Stankiewicz
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Baylor Genetics Laboratories, Baylor College of Medicine, Houston, TX 77030, USA
| | - Amy M Breman
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Baylor Genetics Laboratories, Baylor College of Medicine, Houston, TX 77030, USA
| | - Arran McBride
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON K1H 8L1, Canada
| | - Tejaswi Kandula
- Sydney Children's Hospital, Randwick, NSW 2031, Australia; School of Women's and Children's Health, UNSW Medicine, The University of New South Wales, NSW 2031, Australia
| | - Holly A Dubbs
- Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | | | - Michael Cardamone
- Sydney Children's Hospital, Randwick, NSW 2031, Australia; School of Women's and Children's Health, UNSW Medicine, The University of New South Wales, NSW 2031, Australia
| | - Ying Zhu
- Genetics Laboratory, NSW Health Pathology East Randwick, Sydney, NSW, Australia
| | - Kevin Ying
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Kerith-Rae Dias
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Megan T Cho
- GeneDx, 207 Perry Pkwy Gaithersburg, MD 20877, USA
| | | | | | - Paula Morris
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Jiang Tao
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia; St. Vincent's Clinical School, University of New South Wales, Sydney, NSW 2010, Australia
| | - Mark J Cowley
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia; St. Vincent's Clinical School, University of New South Wales, Sydney, NSW 2010, Australia
| | - Marcel E Dinger
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia; St. Vincent's Clinical School, University of New South Wales, Sydney, NSW 2010, Australia
| | - Tony Roscioli
- Sydney Children's Hospital, Randwick, NSW 2031, Australia; Genetics Laboratory, NSW Health Pathology East Randwick, Sydney, NSW, Australia; Neuroscience Research Australia and Prince of Wales Clinical School, University of New South Wales, Randwick, NSW 2031, Australia
| | - Oana Caluseriu
- Department of Medical Genetics, University of Alberta, AB T6G 2H7, Canada
| | - Oksana Suchowersky
- Department of Medical Genetics, University of Alberta, AB T6G 2H7, Canada; Departments of Medicine (Neurology) and Pediatrics, University of Alberta, AB, Canada
| | - Rani K Sachdev
- Sydney Children's Hospital, Randwick, NSW 2031, Australia; School of Women's and Children's Health, UNSW Medicine, The University of New South Wales, NSW 2031, Australia
| | - Olivier Lichtarge
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jianrong Tang
- Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA; Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Kym M Boycott
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON K1H 8L1, Canada
| | - J Lloyd Holder
- Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA; Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Huda Y Zoghbi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA; Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA; Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA; Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA.
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Turnpenny PD, Wright MJ, Sloman M, Caswell R, van Essen AJ, Gerkes E, Pfundt R, White SM, Shaul-Lotan N, Carpenter L, Schaefer GB, Fryer A, Innes AM, Forbes KP, Chung WK, McLaughlin H, Henderson LB, Roberts AE, Heath KE, Paumard-Hernández B, Gener B, Fawcett KA, Gjergja-Juraški R, Pilz DT, Fry AE, Fry AE. Missense Mutations of the Pro65 Residue of PCGF2 Cause a Recognizable Syndrome Associated with Craniofacial, Neurological, Cardiovascular, and Skeletal Features. Am J Hum Genet 2018; 103:1054-1055. [PMID: 30526864 DOI: 10.1016/j.ajhg.2018.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Turnpenny PD, Wright MJ, Sloman M, Caswell R, van Essen AJ, Gerkes E, Pfundt R, White SM, Shaul-Lotan N, Carpenter L, Schaefer GB, Fryer A, Innes AM, Forbes KP, Chung WK, McLaughlin H, Henderson LB, Roberts AE, Heath KE, Paumard-Hernández B, Gener B, Fawcett KA, Gjergja-Juraški R, Pilz DT, Fry AE, Fry AE. Missense Mutations of the Pro65 Residue of PCGF2 Cause a Recognizable Syndrome Associated with Craniofacial, Neurological, Cardiovascular, and Skeletal Features. Am J Hum Genet 2018; 103:786-793. [PMID: 30343942 DOI: 10.1016/j.ajhg.2018.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 09/22/2018] [Indexed: 12/15/2022] Open
Abstract
PCGF2 encodes the polycomb group ring finger 2 protein, a transcriptional repressor involved in cell proliferation, differentiation, and embryogenesis. PCGF2 is a component of the polycomb repressive complex 1 (PRC1), a multiprotein complex which controls gene silencing through histone modification and chromatin remodelling. We report the phenotypic characterization of 13 patients (11 unrelated individuals and a pair of monozygotic twins) with missense mutations in PCGF2. All the mutations affected the same highly conserved proline in PCGF2 and were de novo, excepting maternal mosaicism in one. The patients demonstrated a recognizable facial gestalt, intellectual disability, feeding problems, impaired growth, and a range of brain, cardiovascular, and skeletal abnormalities. Computer structural modeling suggests the substitutions alter an N-terminal loop of PCGF2 critical for histone biding. Mutant PCGF2 may have dominant-negative effects, sequestering PRC1 components into complexes that lack the ability to interact efficiently with histones. These findings demonstrate the important role of PCGF2 in human development and confirm that heterozygous substitutions of the Pro65 residue of PCGF2 cause a recognizable syndrome characterized by distinctive craniofacial, neurological, cardiovascular, and skeletal features.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Andrew E Fry
- Institute of Medical Genetics, University Hospital of Wales, Cardiff CF14 4XW, UK; Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK.
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McMillan HJ, Telegrafi A, Singleton A, Cho MT, Lelli D, Lynn FC, Griffin J, Asamoah A, Rinne T, Erasmus CE, Koolen DA, Haaxma CA, Keren B, Doummar D, Mignot C, Thompson I, Velsher L, Dehghani M, Vahidi Mehrjardi MY, Maroofian R, Tchan M, Simons C, Christodoulou J, Martín-Hernández E, Guillen Sacoto MJ, Henderson LB, McLaughlin H, Molday LL, Molday RS, Yoon G. Recessive mutations in ATP8A2 cause severe hypotonia, cognitive impairment, hyperkinetic movement disorders and progressive optic atrophy. Orphanet J Rare Dis 2018; 13:86. [PMID: 30012219 PMCID: PMC6048855 DOI: 10.1186/s13023-018-0825-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 05/15/2018] [Indexed: 12/30/2022] Open
Abstract
Background ATP8A2 mutations have recently been described in several patients with severe, early-onset hypotonia and cognitive impairment. The aim of our study was to characterize the clinical phenotype of patients with ATP8A2 mutations. Methods An observational study was conducted at multiple diagnostic centres. Clinical data is presented from 9 unreported and 2 previously reported patients with ATP8A2 mutations. We compare their features with 3 additional patients that have been previously reported in the medical literature. Results Eleven patients with biallelic ATP8A2 mutations were identified, with a mean age of 9.4 years (range 2.5–28 years). All patients with ATP8A2 mutations (100%) demonstrated developmental delay, severe hypotonia and movement disorders, specifically chorea or choreoathetosis (100%), dystonia (27%) and facial dyskinesia (18%). Optic atrophy was observed in 78% of patients for whom funduscopic examination was performed. Symptom onset in all (100%) was noted before 6 months of age, with 70% having symptoms noted at birth. Feeding difficulties were common (91%) although most patients were able to tolerate pureed or thickened feeds, and 3 patients required gastrostomy tube insertion. MRI of the brain was normal in 50% of the patients. A smaller proportion was noted to have mild cortical atrophy (30%), delayed myelination (20%) and/or hypoplastic optic nerves (20%). Functional studies were performed on differentiated induced pluripotent cells from one child, which confirmed a decrease in ATP8A2 expression compared to control cells. Conclusions ATP8A2 gene mutations have emerged as the cause of a novel neurological phenotype characterized by global developmental delays, severe hypotonia and hyperkinetic movement disorders, the latter being an important distinguishing feature. Optic atrophy is common and may only become apparent in the first few years of life, necessitating repeat ophthalmologic evaluation in older children. Early recognition of the cardinal features of this condition will facilitate diagnosis of this complex neurologic disorder. Electronic supplementary material The online version of this article (10.1186/s13023-018-0825-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hugh J McMillan
- Division of Neurology, Department of Pediatrics, Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON, Canada
| | | | | | | | - Daniel Lelli
- Division of Neurology, Department of Medicine, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada
| | - Francis C Lynn
- Diabetes Research Program, Child and Family Research Institute, Vancouver, BC, Canada.,Department of Surgery and Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Julie Griffin
- Weisskopf Child Evaluation Center, Department of Pediatrics, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Alexander Asamoah
- Weisskopf Child Evaluation Center, Department of Pediatrics, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Tuula Rinne
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Corrie E Erasmus
- Department of Neurology, Donders Center of Neuroscience, Radboud University Medical Center, Nijmegen, The Netherlands
| | - David A Koolen
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Charlotte A Haaxma
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Boris Keren
- Assistance Publique Hôpitaux de Paris, Département de Génétique, Groupe Hospitalier, Pitié-Salpêtrière, Paris, France
| | - Diane Doummar
- Service de Neuropédiatrie, Hôpital Armand-Trousseau, Paris, France
| | - Cyril Mignot
- Assistance Publique Hôpitaux de Paris, Département de Génétique, Groupe Hospitalier, Pitié-Salpêtrière, Paris, France.,Centre de Référence Déficiences Intellectuelles de Causes Rares, GH Pitié Salpêtrière, Paris, France.,Groupe de Recherche Clinique UPMC Déficience Intellectuelle de Causes Rares et Autisme GH Pitié-Salpêtrière, Paris, France
| | - Islay Thompson
- Genetics Program, North York General Hospital, Toronto, ON, Canada
| | - Lea Velsher
- Genetics Program, North York General Hospital, Toronto, ON, Canada
| | - Mohammadreza Dehghani
- Medical Genetics Research Centre, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.,Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Yahya Vahidi Mehrjardi
- Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.,Diabetes Research Centre, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Reza Maroofian
- Human Genetics Research Centre, Molecular and Clinical Sciences Institute, St George's University of London, London, UK
| | - Michel Tchan
- Department of Genetic Medicine, Westmead Hospital, Westmead, NSW, Australia.,Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - Cas Simons
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia
| | - John Christodoulou
- Neurodevelopmental Genomics Research Group, Murdoch Childrens Research Institute and Department of Paediatrics, Melbourne Medical School, University of Melbourne, Melbourne, VIC, Australia
| | - Elena Martín-Hernández
- Unidad de Enfermedades Mitocondriales-Metabólicas Hereditarias, Servicio de Pediatría Hospital Universitario 12 de Octubre, Universidad Complutense de Madrid, Madrid, Spain
| | | | | | | | - Laurie L Molday
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.,Department of Ophthalmology and Visual Sciences, Centre for Macular Research, University of British Columbia, Vancouver, BC, Canada
| | - Robert S Molday
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.,Department of Ophthalmology and Visual Sciences, Centre for Macular Research, University of British Columbia, Vancouver, BC, Canada
| | - Grace Yoon
- Division of Clinical and Metabolic Genetics, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON, M5G 1X8, Canada. .,Division of Neurology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.
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24
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Gauthier J, Meijer IA, Lessel D, Mencacci NE, Krainc D, Hempel M, Tsiakas K, Prokisch H, Rossignol E, Helm MH, Rodan LH, Karamchandani J, Carecchio M, Lubbe SJ, Telegrafi A, Henderson LB, Lorenzo K, Wallace SE, Glass IA, Hamdan FF, Michaud JL, Rouleau GA, Campeau PM. Recessive mutations in
VPS13D
cause childhood onset movement disorders. Ann Neurol 2018. [DOI: 10.1002/ana.25204] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Julie Gauthier
- Molecular Diagnostic Laboratory and Division of Medical Genetics, Department of PediatricsSaint Justine University Hospital CenterMontreal Canada
| | - Inge A. Meijer
- Department of NeuroscienceUniversity of MontrealMontreal Canada
| | - Davor Lessel
- Institute of Human GeneticsUniversity Medical Center Hamburg‐EppendorfHamburg Germany
| | - Niccolò E. Mencacci
- Department of NeurologyNorthwestern University, Feinberg School of MedicineChicago IL
| | - Dimitri Krainc
- Department of NeurologyNorthwestern University, Feinberg School of MedicineChicago IL
| | - Maja Hempel
- Institute of Human GeneticsUniversity Medical Center Hamburg‐EppendorfHamburg Germany
| | - Konstantinos Tsiakas
- Department of PediatricsUniversity Medical Center Hamburg‐EppendorfHamburg Germany
| | - Holger Prokisch
- Institute of Human Genetics, Helmholtz Center MunichNeuherberg Germany
- Institute of Human GeneticsTechnical University MunichMunich Germany
| | - Elsa Rossignol
- Department of NeuroscienceUniversity of MontrealMontreal Canada
| | | | - Lance H. Rodan
- Department of NeurologyBoston Children's HospitalBoston MA
| | - Jason Karamchandani
- Department of PathologyMcGill University, Montreal Neurological InstituteMontreal Canada
| | - Miryam Carecchio
- Molecular Neurogenetics Unit, Institute for Research and Health Care (IRCCS) Foundation Carlo Besta Neurological InstituteMilan Italy
| | - Steven J. Lubbe
- Department of NeurologyNorthwestern University, Feinberg School of MedicineChicago IL
| | | | | | | | - Stephanie E. Wallace
- Division of Genetic Medicine, Department of PediatricsSeattle Children's Hospital and University of WashingtonSeattle WA
| | - Ian A. Glass
- Division of Genetic Medicine, Department of PediatricsSeattle Children's Hospital and University of WashingtonSeattle WA
| | - Fadi F. Hamdan
- Molecular Diagnostic Laboratory and Division of Medical Genetics, Department of PediatricsSaint Justine University Hospital CenterMontreal Canada
| | - Jacques L. Michaud
- Department of PediatricsSaint Justine University Hospital Center and University of MontrealMontreal Canada
| | - Guy A. Rouleau
- Montreal Neurological Institute, Department of Neurology and NeurosurgeryMcGill UniversityMontreal Canada
| | - Philippe M. Campeau
- Department of PediatricsSaint Justine University Hospital Center and University of MontrealMontreal Canada
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25
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Yoo Y, Jung J, Lee YN, Lee Y, Cho H, Na E, Hong J, Kim E, Lee JS, Lee JS, Hong C, Park SY, Wie J, Miller K, Shur N, Clow C, Ebel RS, DeBrosse SD, Henderson LB, Willaert R, Castaldi C, Tikhonova I, Bilgüvar K, Mane S, Kim KJ, Hwang YS, Lee SG, So I, Lim BC, Choi HJ, Seong JY, Shin YB, Jung H, Chae JH, Choi M. GABBR2mutations determine phenotype in rett syndrome and epileptic encephalopathy. Ann Neurol 2017; 82:466-478. [DOI: 10.1002/ana.25032] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 08/23/2017] [Accepted: 08/23/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Yongjin Yoo
- Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Republic of Korea
| | - Jane Jung
- Department of Anatomy, Brain Research Institute, and Brain Korea 21 PLUS Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Yoo-Na Lee
- Graduate School of Medicine; Korea University; Seoul Republic of Korea
| | - Youngha Lee
- Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Republic of Korea
| | - Hyosuk Cho
- Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Republic of Korea
| | - Eunjung Na
- Department of Anatomy, Brain Research Institute, and Brain Korea 21 PLUS Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - JeaYeok Hong
- Department of Anatomy, Brain Research Institute, and Brain Korea 21 PLUS Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Eunjin Kim
- Department of Anatomy, Brain Research Institute, and Brain Korea 21 PLUS Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Jin Sook Lee
- Department of Pediatrics, Department of Genome Medicine and Science; Gachon University Gil Medical Center; Incheon Republic of Korea
| | - Je Sang Lee
- Department of Rehabilitation Medicine; Pusan National University College of Medicine; Pusan Republic of Korea
| | - Chansik Hong
- Department of Physiology; Chosun University School of Medicine; Kwangju Republic of Korea
| | - Sang-Yoon Park
- Department of Science in Korean Medicine, Cancer Preventive Material Developmental Research Center, College of Korean Medicine; Kyung Hee University; Seoul Republic of Korea
| | - Jinhong Wie
- Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Republic of Korea
- Department of Physiology; Seoul National University College of Medicine; Seoul Republic of Korea
| | | | | | | | - Roseànne S. Ebel
- UH Cleveland Medical Center; Center for Human Genetics; Cleveland OH
| | | | | | | | | | | | - Kaya Bilgüvar
- Yale Center for Genome Analysis; West Haven CT
- Department of Genetics; Yale University School of Medicine; New Haven CT
| | - Shrikant Mane
- Yale Center for Genome Analysis; West Haven CT
- Department of Genetics; Yale University School of Medicine; New Haven CT
| | - Ki Joong Kim
- Department of Pediatrics, Seoul National University College of Medicine; Seoul National University Children's Hospital; Seoul Republic of Korea
| | - Yong Seung Hwang
- Department of Pediatrics, Seoul National University College of Medicine; Seoul National University Children's Hospital; Seoul Republic of Korea
| | - Seok-Geun Lee
- Department of Science in Korean Medicine, Cancer Preventive Material Developmental Research Center, College of Korean Medicine; Kyung Hee University; Seoul Republic of Korea
| | - Insuk So
- Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Republic of Korea
- Department of Physiology; Seoul National University College of Medicine; Seoul Republic of Korea
| | - Byung Chan Lim
- Department of Pediatrics, Seoul National University College of Medicine; Seoul National University Children's Hospital; Seoul Republic of Korea
| | - Hee-Jung Choi
- Department of Biological Sciences; Seoul National University College of Natural Sciences; Seoul Republic of Korea
| | - Jae Young Seong
- Graduate School of Medicine; Korea University; Seoul Republic of Korea
| | - Yong Beom Shin
- Department of Rehabilitation Medicine; Pusan National University College of Medicine; Pusan Republic of Korea
| | - Hosung Jung
- Department of Anatomy, Brain Research Institute, and Brain Korea 21 PLUS Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Jong-Hee Chae
- Department of Pediatrics, Seoul National University College of Medicine; Seoul National University Children's Hospital; Seoul Republic of Korea
| | - Murim Choi
- Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Republic of Korea
- Department of Pediatrics, Seoul National University College of Medicine; Seoul National University Children's Hospital; Seoul Republic of Korea
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26
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Pilarowski GO, Vernon HJ, Applegate CD, Boukas L, Cho MT, Gurnett CA, Benke PJ, Beaver E, Heeley JM, Medne L, Krantz ID, Azage M, Niyazov D, Henderson LB, Wentzensen IM, Baskin B, Sacoto MJG, Bowman GD, Bjornsson HT. Missense variants in the chromatin remodeler CHD1 are associated with neurodevelopmental disability. J Med Genet 2017; 55:561-566. [PMID: 28866611 DOI: 10.1136/jmedgenet-2017-104759] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 07/07/2017] [Accepted: 08/04/2017] [Indexed: 11/04/2022]
Abstract
BACKGROUND The list of Mendelian disorders of the epigenetic machinery has expanded rapidly during the last 5 years. A few missense variants in the chromatin remodeler CHD1 have been found in several large-scale sequencing efforts focused on uncovering the genetic aetiology of autism. OBJECTIVES To explore whether variants in CHD1 are associated with a human phenotype. METHODS We used GeneMatcher to identify other physicians caring for patients with variants in CHD1. We also explored the epigenetic consequences of one of these variants in cultured fibroblasts. RESULTS Here we describe six CHD1 heterozygous missense variants in a cohort of patients with autism, speech apraxia, developmental delay and facial dysmorphic features. Importantly, three of these variants occurred de novo. We also report on a subject with a de novo deletion covering a large fraction of the CHD1 gene without any obvious neurological phenotype. Finally, we demonstrate increased levels of the closed chromatin modification H3K27me3 in fibroblasts from a subject carrying a de novo variant in CHD1. CONCLUSIONS Our results suggest that variants in CHD1 can lead to diverse phenotypic outcomes; however, the neurodevelopmental phenotype appears to be limited to patients with missense variants, which is compatible with a dominant negative mechanism of disease.
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Affiliation(s)
- Genay O Pilarowski
- Predoctoral Program in Human Genetics, Johns Hopkins School of Medicine, Baltimore, Maryland, USA.,McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Hilary J Vernon
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Neurogenetics, Kennedy Krieger Institute, Baltimore, Maryland, USA.,Department of Pediatrics, Johns Hopkins University, School of Medicine, Baltimore, Maryland, USA
| | - Carolyn D Applegate
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Leandros Boukas
- Predoctoral Program in Human Genetics, Johns Hopkins School of Medicine, Baltimore, Maryland, USA.,McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | | | - Christina A Gurnett
- Department of Neurology, Division of Pediatric Neurology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Paul J Benke
- Joe DiMaggio Children's Hospital, Florida Atlantic School of Medicine, Hollywood, Florida, USA
| | - Erin Beaver
- Mercy Kids Genetics, Mercy Hospital, Saint Louis, Missouri, USA
| | | | - Livija Medne
- Division of Human Genetics, Department of Pediatrics, Individualized Medical Genetics Center, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Ian D Krantz
- Division of Human Genetics, Department of Pediatrics, Individualized Medical Genetics Center, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Meron Azage
- Department of Pediatrics, Ochsner Clinic, New Orleans, Louisiana, USA
| | - Dmitriy Niyazov
- Department of Pediatrics, Ochsner Clinic, New Orleans, Louisiana, USA
| | | | | | | | | | - Gregory D Bowman
- T.C. Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Biology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Hans T Bjornsson
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Pediatrics, Johns Hopkins University, School of Medicine, Baltimore, Maryland, USA.,Faculty of Medicine, University of Iceland, Reykjavik, Iceland
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27
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Steinfeld H, Cho MT, Retterer K, Person R, Schaefer GB, Danylchuk N, Malik S, Wechsler SB, Wheeler PG, van Gassen KLI, Terhal PA, Verhoeven VJM, van Slegtenhorst MA, Monaghan KG, Henderson LB, Chung WK. Mutations in HIVEP2 are associated with developmental delay, intellectual disability, and dysmorphic features. Neurogenetics 2016; 17:159-64. [PMID: 27003583 DOI: 10.1007/s10048-016-0479-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 03/12/2016] [Indexed: 01/08/2023]
Abstract
Human immunodeficiency virus type I enhancer binding protein 2 (HIVEP2) has been previously associated with intellectual disability and developmental delay in three patients. Here, we describe six patients with developmental delay, intellectual disability, and dysmorphic features with de novo likely gene-damaging variants in HIVEP2 identified by whole-exome sequencing (WES). HIVEP2 encodes a large transcription factor that regulates various neurodevelopmental pathways. Our findings provide further evidence that pathogenic variants in HIVEP2 lead to intellectual disabilities and developmental delay.
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Affiliation(s)
- Hallie Steinfeld
- Department of Pediatrics, Columbia University Medical Center, 1150 St. Nicholas Avenue, New York, 10032, NY, USA
| | | | | | | | | | | | | | | | | | - Koen L I van Gassen
- Department of Genetics, University Medical Center Utrecht, Utrecht, 3584, The Netherlands
| | - P A Terhal
- Department of Genetics, University Medical Center Utrecht, Utrecht, 3584, The Netherlands
| | | | | | | | | | - Wendy K Chung
- Department of Pediatrics, Columbia University Medical Center, 1150 St. Nicholas Avenue, New York, 10032, NY, USA. .,Department of Medicine, Columbia University Medical Center, New York, NY, USA.
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28
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Shang L, Henderson LB, Cho MT, Petrey DS, Fong CT, Haude KM, Shur N, Lundberg J, Hauser N, Carmichael J, Innis J, Schuette J, Wu YW, Asaikar S, Pearson M, Folk L, Retterer K, Monaghan KG, Chung WK. De novo missense variants in PPP2R5D are associated with intellectual disability, macrocephaly, hypotonia, and autism. Neurogenetics 2015; 17:43-9. [PMID: 26576547 DOI: 10.1007/s10048-015-0466-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 10/22/2015] [Indexed: 12/19/2022]
Abstract
Protein phosphatase 2A (PP2A) is a heterotrimeric protein serine/threonine phosphatase and is involved in a broad range of cellular processes. PPP2R5D is a regulatory B subunit of PP2A and plays an important role in regulating key neuronal and developmental regulation processes such as PI3K/AKT and glycogen synthase kinase 3 beta (GSK3β)-mediated cell growth, chromatin remodeling, and gene transcriptional regulation. Using whole-exome sequencing (WES), we identified four de novo variants in PPP2R5D in a total of seven unrelated individuals with intellectual disability (ID) and other shared clinical characteristics, including autism spectrum disorder, macrocephaly, hypotonia, seizures, and dysmorphic features. Among the four variants, two have been previously reported and two are novel. All four amino acids are highly conserved among the PP2A subunit family, and all change a negatively charged acidic glutamic acid (E) to a positively charged basic lysine (K) and are predicted to disrupt the PP2A subunit binding and impair the dephosphorylation capacity. Our data provides further support for PPP2R5D as a genetic cause of ID.
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Affiliation(s)
- Linshan Shang
- Department of Pediatrics, Columbia University Medical Center, New York, NY, USA
| | | | | | - Donald S Petrey
- Department of Biochemistry and Molecular Biophysics, Columbia University Medical Center, New York, NY, USA
| | - Chin-To Fong
- University of Rochester Medical Center, Rochester, NY, USA
| | | | | | | | | | | | - Jeffrey Innis
- Division of Pediatric Genetics, University of Michigan Health System, Ann Arbor, MI, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jane Schuette
- Division of Pediatric Genetics, University of Michigan Health System, Ann Arbor, MI, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Yvonne W Wu
- Departments of Neurology and Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | | | | | | | | | | | - Wendy K Chung
- Department of Pediatrics, Columbia University Medical Center, New York, NY, USA.
- Department of Medicine, Columbia University Medical Center, New York, NY, USA.
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29
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Henderson LB, Doshi VK, Blackman SM, Naughton KM, Pace RG, Moskovitz J, Knowles MR, Durie PR, Drumm ML, Cutting GR. Variation in MSRA modifies risk of neonatal intestinal obstruction in cystic fibrosis. PLoS Genet 2012; 8:e1002580. [PMID: 22438829 PMCID: PMC3305406 DOI: 10.1371/journal.pgen.1002580] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2011] [Accepted: 01/19/2012] [Indexed: 12/23/2022] Open
Abstract
Meconium ileus (MI), a life-threatening intestinal obstruction due to meconium with abnormal protein content, occurs in approximately 15 percent of neonates with cystic fibrosis (CF). Analysis of twins with CF demonstrates that MI is a highly heritable trait, indicating that genetic modifiers are largely responsible for this complication. Here, we performed regional family-based association analysis of a locus that had previously been linked to MI and found that SNP haplotypes 5' to and within the MSRA gene were associated with MI (P = 1.99 × 10(-5) to 1.08 × 10(-6); Bonferroni P = 0.057 to 3.1 × 10(-3)). The haplotype with the lowest P value showed association with MI in an independent sample of 1,335 unrelated CF patients (OR = 0.72, 95% CI [0.53-0.98], P = 0.04). Intestinal obstruction at the time of weaning was decreased in CF mice with Msra null alleles compared to those with wild-type Msra resulting in significant improvement in survival (P = 1.2 × 10(-4)). Similar levels of goblet cell hyperplasia were observed in the ilea of the Cftr(-/-) and Cftr(-/-)Msra(-/-) mice. Modulation of MSRA, an antioxidant shown to preserve the activity of enzymes, may influence proteolysis in the developing intestine of the CF fetus, thereby altering the incidence of obstruction in the newborn period. Identification of MSRA as a modifier of MI provides new insight into the biologic mechanism of neonatal intestinal obstruction caused by loss of CFTR function.
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Affiliation(s)
- Lindsay B. Henderson
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Vishal K. Doshi
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Scott M. Blackman
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Division of Pediatric Endocrinology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Kathleen M. Naughton
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Rhonda G. Pace
- Cystic Fibrosis/Pulmonary Research and Treatment Center, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Jackob Moskovitz
- Department of Pharmacology and Toxicology, University of Kansas, Lawrence, Kansas, United States of America
| | - Michael R. Knowles
- Cystic Fibrosis/Pulmonary Research and Treatment Center, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Peter R. Durie
- Division of Gastroenterology, Hepatology, and Nutrition, Hospital for Sick Children, Toronto, Canada
- Department of Pediatrics, University of Toronto, Toronto, Canada
| | - Mitchell L. Drumm
- Departments of Pediatrics and Genetics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Garry R. Cutting
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
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30
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Harada S, Henderson LB, Eshleman JR, Gocke CD, Burger P, Griffin CA, Batista DAS. Genomic changes in gliomas detected using single nucleotide polymorphism array in formalin-fixed, paraffin-embedded tissue: superior results compared with microsatellite analysis. J Mol Diagn 2011; 13:541-8. [PMID: 21726663 DOI: 10.1016/j.jmoldx.2011.05.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/02/2011] [Accepted: 05/10/2011] [Indexed: 11/26/2022] Open
Abstract
Deletion or loss of heterozygosity (LOH) in chromosomes 1p and 19q in oligodendrogliomas (ODGs) have diagnostic, prognostic, and therapeutic implications. Current clinical assays are limited because the probes or primers interrogate only limited genomic segments. We investigated the use of single nucleotide polymorphism (SNP) arrays for identifying genomic changes in gliomas from FFPE tissues. DNA was extracted from FFPE tissues of 30 brain tumor cases (15 ODGs and 15 non-ODGs) and assayed on the Illumina array with 300,000 markers. SNP results were compared with standard short tandem repeat (STR) assays of chromosomes 1p and 19q. Fifteen ODGs had LOH by STR and deletion by array on both 1p and 19q. Ten non-ODGs had no evidence of LOH on 1p and 19q by STR, seven of which had no abnormalities for these chromosomes; three had partial deletions by SNP array. Five non-ODG cases had partial LOH or deletion by both assays. No major discordance was found between SNP array and STR results. Advantages of SNP arrays include no need for an accompanying normal sample, the ability to find small segmental deletions, the potential to distinguish between deletions and copy neutral LOH, and whole-genome screening to allow discovery of new, significant loci. Assessment of genomic changes in routine glioma specimens using SNP arrays is feasible and has great potential as an accurate clinical diagnostic test.
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Affiliation(s)
- Shuko Harada
- Department of Pathology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
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31
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Green DM, McDougal KE, Blackman SM, Sosnay PR, Henderson LB, Naughton KM, Collaco JM, Cutting GR. Mutations that permit residual CFTR function delay acquisition of multiple respiratory pathogens in CF patients. Respir Res 2010; 11:140. [PMID: 20932301 PMCID: PMC2964615 DOI: 10.1186/1465-9921-11-140] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Accepted: 10/08/2010] [Indexed: 12/22/2022] Open
Abstract
Background Lung infection by various organisms is a characteristic feature of cystic fibrosis (CF). CFTR genotype effects acquisition of Pseudomonas aeruginosa (Pa), however the effect on acquisition of other infectious organisms that frequently precede Pa is relatively unknown. Understanding the role of CFTR in the acquisition of organisms first detected in patients may help guide symptomatic and molecular-based treatment for CF. Methods Lung infection, defined as a single positive respiratory tract culture, was assessed for 13 organisms in 1,381 individuals with CF. Subjects were divided by predicted CFTR function: 'Residual': carrying at least one partial function CFTR mutation (class IV or V) and 'Minimal' those who do not carry a partial function mutation. Kaplan-Meier estimates were created to assess CFTR effect on age of acquisition for each organism. Cox proportional hazard models were performed to control for possible cofactors. A separate Cox regression was used to determine whether defining infection with Pa, mucoid Pa or Aspergillus (Asp) using alternative criteria affected the results. The influence of severity of lung disease at the time of acquisition was evaluated using stratified Cox regression methods by lung disease categories. Results Subjects with 'Minimal' CFTR function had a higher hazard than patients with 'Residual' function for acquisition of 9 of 13 organisms studied (HR ranging from 1.7 to 3.78 based on the organism studied). Subjects with minimal CFTR function acquired infection at a younger age than those with residual function for 12 of 13 organisms (p-values ranging: < 0.001 to 0.017). Minimal CFTR function also associated with younger age of infection when 3 alternative definitions of infection with Pa, mucoid Pa or Asp were employed. Risk of infection is correlated with CFTR function for 8 of 9 organisms in patients with good lung function (>90%ile) but only 1 of 9 organisms in those with poorer lung function (<50%ile). Conclusions Residual CFTR function correlates with later onset of respiratory tract infection by a wide spectrum of organisms frequently cultured from CF patients. The protective effect conferred by residual CFTR function is diminished in CF patients with more advanced lung disease.
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Affiliation(s)
- Deanna M Green
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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32
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Gu Y, Harley ITW, Henderson LB, Aronow BJ, Vietor I, Huber LA, Harley JB, Kilpatrick JR, Langefeld CD, Williams AH, Jegga AG, Chen J, Wills-Karp M, Arshad SH, Ewart SL, Thio CL, Flick LM, Filippi MD, Grimes HL, Drumm ML, Cutting GR, Knowles MR, Karp CL. Identification of IFRD1 as a modifier gene for cystic fibrosis lung disease. Nature 2009; 458:1039-42. [PMID: 19242412 PMCID: PMC2841516 DOI: 10.1038/nature07811] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Accepted: 01/20/2009] [Indexed: 01/11/2023]
Abstract
Lung disease is the major cause of morbidity and mortality in cystic fibrosis (CF), an autosomal recessive disease caused by mutations in CFTR. In CF, chronic infection and dysregulated neutrophilic inflammation lead to progressive airway destruction. The severity of CF lung disease has significant heritability, independent of CFTR genotype1. To identify genetic modifiers, we performed a genome-wide single nucleotide polymorphism (SNP) scan in one cohort of CF patients, replicating top candidates in an independent cohort. This approach identified IFRD1 as a modifier of CF lung disease severity. IFRD1 is a histone deacetylase (HDAC)-dependent transcriptional co-regulator expressed during terminal neutrophil differentiation. Neutrophils, but not macrophages, from Ifrd1-deficient mice exhibited blunted effector function, associated with decreased NF-κB p65 transactivation. In vivo, IFRD1 deficiency caused delayed bacterial clearance from the airway, but also less inflammation and disease—a phenotype primarily dependent on hematopoietic cell expression, or lack of expression, of IFRD1. In humans, IFRD1 polymorphisms were significantly associated with variation in neutrophil effector function. These data suggest that IFRD1 modulates the pathogenesis of CF lung disease through regulation of neutrophil effector function.
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Affiliation(s)
- YuanYuan Gu
- Division of Molecular Immunology, Cincinnati Children's Hospital Research Foundation and the University of Cincinnati College of Medicine, Cincinnati, Ohio 45229, USA
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Kayser M, Henderson LB, Kreutzman J, Schreck R, Graham JM. Blaschkolinear skin pigmentary variation due to trisomy 7 mosaicism. Am J Med Genet 2000; 95:281-4. [PMID: 11102936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Mosaic trisomy 7 is a rare condition that can be seen in individuals with Blaschkolinear skin pigmentary variation, somatic asymmetry, and variable other clinical anomalies. In any patient presenting with Blaschkolinear skin pigmentary variation, varying degrees of asymmetrical growth disturbance, developmental delay, and a normal lymphocytic karyotype, chromosomal mosaicism may be present. To rule out tissue-specific or occult chromosomal mosaicism, it is recommended to culture and karyotype skin fibroblasts, since lymphocyte cell lines may not demonstrate the abnormal cell line. Early diagnosis is of paramount importance, since early physical, occupational, and speech/language therapy can greatly improve the developmental outcome of these patients. We report on a fourth patient with trisomy 7 mosaicism in whom early diagnosis and developmental therapy contributed to an improved developmental outcome when compared with patients in previous reports. Early intervention can greatly benefit patients with this diagnosis, especially in minimizing the aggressive behavior associated with communication difficulties. Our patient has milder manifestations than the previously reported patients with no seizure activity or asymmetry and fewer cells with trisomy 7.
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Affiliation(s)
- M Kayser
- Medical Genetics Birth Defects Center, Ahmanson Department of Pediatrics, SHARE's Child Disability Center, UCLA School of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Abstract
PURPOSE To describe genetic epidemiologic aspects of osteoporosis. METHODS 69 patients with osteoporosis were interviewed regarding personal and family histories of osteoporosis and related fractures. Family history information was obtained on 421 first degree and 748 second degree relatives. RESULTS 45% of cases reported a family history of osteoporosis. Familial cases were characterized neither by an earlier age of diagnosis nor by a greater degree of phenotypic severity. Empiric risks for osteoporosis were highest for mothers, 33%, and were 19% for sisters. CONCLUSION These results provide an initial genetic epidemiologic profile for osteoporosis and information useful for genetic counseling.
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Affiliation(s)
- L B Henderson
- Department of Internal Medicine, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
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