1
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Rooney K, van der Laan L, Trajkova S, Haghshenas S, Relator R, Lauffer P, Vos N, Levy MA, Brunetti-Pierri N, Terrone G, Mignot C, Keren B, Billette de Villemeur T, Volker-Touw CML, Verbeek N, van der Smagt JJ, Oegema R, Brusco A, Ferrero GB, Misra-Isrie M, Hochstenbach R, Alders M, Mannens MMAM, Sadikovic B, van Haelst MM, Henneman P. DNA methylation episignature and comparative epigenomic profiling of HNRNPU-related neurodevelopmental disorder. Genet Med 2023:100871. [PMID: 37120726 DOI: 10.1016/j.gim.2023.100871] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [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: 01/19/2023] [Revised: 04/24/2023] [Accepted: 04/24/2023] [Indexed: 05/01/2023] Open
Abstract
PURPOSE HNRNPU haploinsufficiency is associated with Developmental and Epileptic Encephalopathy 54. This neurodevelopmental disorder is characterized by developmental delay, intellectual disability, speech impairment, and early onset epilepsy. We performed genome-wide DNA methylation (DNAm) analysis in a cohort of individuals to develop a diagnostic biomarker and gain functional insights into the molecular pathophysiology of HNRNPU-related disorder. METHODS DNAm profiles of individuals carrying pathogenic HNRNPU variants, identified through an international multi-center collaboration, were assessed using Infinium Methylation EPIC arrays. Statistical and functional correlation analyses were performed comparing the HNRNPU cohort to 56 previously reported DNAm episignatures. RESULTS A robust and reproducible DNAm episignature and global DNAm profile were identified. Correlation analysis identified partial overlap and similarity of the global HNRNPU DNAm profile to several other rare disorders. CONCLUSION This study demonstrates new evidence of a specific and sensitive DNAm episignature associated with pathogenic heterozygous HNRNPU-variants, establishing its utility as a clinical biomarker for the expansion of the EpiSignTM diagnostic test.
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Affiliation(s)
- Kathleen Rooney
- Verspeeten Clinical Genome Centre, London Health Science Centre, London, ON, Canada; Department of Pathology and Laboratory Medicine, Western University, London, ON, Canada
| | - Liselot van der Laan
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Slavica Trajkova
- Department of Medical Sciences, University of Torino, Torino, Italy
| | - Sadegheh Haghshenas
- Verspeeten Clinical Genome Centre, London Health Science Centre, London, ON, Canada
| | - Raissa Relator
- Verspeeten Clinical Genome Centre, London Health Science Centre, London, ON, Canada
| | - Peter Lauffer
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Niels Vos
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Michael A Levy
- Verspeeten Clinical Genome Centre, London Health Science Centre, London, ON, Canada
| | - Nicola Brunetti-Pierri
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy; Department of Translational Medicine, Federico II University, Naples, Italy
| | - Gaetano Terrone
- Department of Translational Medicine, Federico II University, Naples, Italy
| | - Cyril Mignot
- Assistance Publique-Hopitaux de Paris, Sorbonne Université, Departement de Génétique, Groupe Hospitalier Pitie-Salpetriere et Hopital Trousseau, Paris, France
| | - Boris Keren
- Assistance Publique-Hopitaux de Paris, Sorbonne Université, Departement de Génétique, Groupe Hospitalier Pitie-Salpetriere et Hopital Trousseau, Paris, France
| | | | - Catharina M L Volker-Touw
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Nienke Verbeek
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jasper J van der Smagt
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Renske Oegema
- Department of Genetics, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Alfredo Brusco
- Department of Medical Sciences, University of Torino, Torino, Italy; Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Torino, Italy
| | | | - Mala Misra-Isrie
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Ron Hochstenbach
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Mariëlle Alders
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Marcel M A M Mannens
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Bekim Sadikovic
- Verspeeten Clinical Genome Centre, London Health Science Centre, London, ON, Canada; Department of Pathology and Laboratory Medicine, Western University, London, ON, Canada.
| | - Mieke M van Haelst
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Peter Henneman
- Department of Human Genetics, Amsterdam Reproduction & Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.
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2
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van Jaarsveld RH, Reilly J, Cornips MC, Hadders MA, Agolini E, Ahimaz P, Anyane-Yeboa K, Bellanger SA, van Binsbergen E, van den Boogaard MJ, Brischoux-Boucher E, Caylor RC, Ciolfi A, van Essen TAJ, Fontana P, Hopman S, Iascone M, Javier MM, Kamsteeg EJ, Kerkhof J, Kido J, Kim HG, Kleefstra T, Lonardo F, Lai A, Lev D, Levy MA, Lewis MES, Lichty A, Mannens MMAM, Matsumoto N, Maya I, McConkey H, Megarbane A, Michaud V, Miele E, Niceta M, Novelli A, Onesimo R, Pfundt R, Popp B, Prijoles E, Relator R, Redon S, Rots D, Rouault K, Saida K, Schieving J, Tartaglia M, Tenconi R, Uguen K, Verbeek N, Walsh CA, Yosovich K, Yuskaitis CJ, Zampino G, Sadikovic B, Alders M, Oegema R. Delineation of a KDM2B-related neurodevelopmental disorder and its associated DNA methylation signature. Genet Med 2023; 25:49-62. [PMID: 36322151 PMCID: PMC9825659 DOI: 10.1016/j.gim.2022.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/12/2022] [Accepted: 09/12/2022] [Indexed: 11/05/2022] Open
Abstract
PURPOSE Pathogenic variants in genes involved in the epigenetic machinery are an emerging cause of neurodevelopment disorders (NDDs). Lysine-demethylase 2B (KDM2B) encodes an epigenetic regulator and mouse models suggest an important role during development. We set out to determine whether KDM2B variants are associated with NDD. METHODS Through international collaborations, we collected data on individuals with heterozygous KDM2B variants. We applied methylation arrays on peripheral blood DNA samples to determine a KDM2B associated epigenetic signature. RESULTS We recruited a total of 27 individuals with heterozygous variants in KDM2B. We present evidence, including a shared epigenetic signature, to support a pathogenic classification of 15 KDM2B variants and identify the CxxC domain as a mutational hotspot. Both loss-of-function and CxxC-domain missense variants present with a specific subepisignature. Moreover, the KDM2B episignature was identified in the context of a dual molecular diagnosis in multiple individuals. Our efforts resulted in a cohort of 21 individuals with heterozygous (likely) pathogenic variants. Individuals in this cohort present with developmental delay and/or intellectual disability; autism; attention deficit disorder/attention deficit hyperactivity disorder; congenital organ anomalies mainly of the heart, eyes, and urogenital system; and subtle facial dysmorphism. CONCLUSION Pathogenic heterozygous variants in KDM2B are associated with NDD and a specific epigenetic signature detectable in peripheral blood.
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Affiliation(s)
| | - Jack Reilly
- Department of Pathology and Laboratory Medicine, Western University, London, Ontario, Canada
| | - Marie-Claire Cornips
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Michael A Hadders
- Oncode Institute and Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Emanuele Agolini
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children Hospital, IRCCS, 00165 Rome, Italy
| | - Priyanka Ahimaz
- Division of Clinical Genetics, Department of Pediatrics, Columbia University, New York, NY
| | - Kwame Anyane-Yeboa
- Division of Clinical Genetics, Department of Pediatrics, Columbia University, New York, NY
| | - Severine Audebert Bellanger
- Service de Génétique Médicale et de Biologie de la Reproduction, Centre Hospitalier Regional Universitaire Brest, Brest, France
| | - Ellen van Binsbergen
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | | | | | - Andrea Ciolfi
- Genetics and Rare Diseases Research Division, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Ton A J van Essen
- Department of Medical Genetics, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Paolo Fontana
- Medical Genetics Unit, A.O.R.N. San Pio, Benevento, Italy
| | - Saskia Hopman
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Maria Iascone
- Laboratorio di Genetica Medica - ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Margaret M Javier
- Department of Medical Genetics, BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Erik-Jan Kamsteeg
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jennifer Kerkhof
- Verspeeten Clinical Genome Centre, London Health Sciences Centre, London, Ontario, Canada
| | - Jun Kido
- Department of Pediatrics, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Hyung-Goo Kim
- Neurological Disorders Research Center, Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Doha, Qatar
| | - Tjitske Kleefstra
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Abbe Lai
- Division of Epilepsy and Clinical Neurophysiology and Epilepsy Genetics Program and Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Dorit Lev
- The Rina Mor Institute of Medical Genetics, Wolfson Medical Center, Holon, Israel
| | - Michael A Levy
- Verspeeten Clinical Genome Centre, London Health Sciences Centre, London, Ontario, Canada
| | - M E Suzanne Lewis
- Department of Medical Genetics, BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Marcel M A M Mannens
- Department of Human Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam Reproduction and Development Research Institute, Amsterdam, The Netherlands
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Idit Maya
- The Raphael Recanati Genetic Institute, Rabin Medical Center, Beilinson Hospital, Petach-Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Haley McConkey
- Department of Pathology and Laboratory Medicine, Western University, London, Ontario, Canada; Verspeeten Clinical Genome Centre, London Health Sciences Centre, London, Ontario, Canada
| | - Andre Megarbane
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon; Institut Jérôme Lejeune, Paris, France
| | - Vincent Michaud
- Department of Medical Genetics, CHU Bordeaux, Bordeaux, France
| | - Evelina Miele
- Department of Pediatric Hematology and Oncology and Cellular and Gene Therapy, Bambino Gesù Children's Hospital, Scientific Institute for Research, Hospitalization and Healthcare (IRCCS), Rome, Italy
| | - Marcello Niceta
- Genetics and Rare Diseases Research Division, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Antonio Novelli
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children Hospital, IRCCS, 00165 Rome, Italy
| | - Roberta Onesimo
- Center for Rare Diseases and Congenital Defects, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Rolph Pfundt
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bernt Popp
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany; Center of Functional Genomics, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | | | - Raissa Relator
- Verspeeten Clinical Genome Centre, London Health Sciences Centre, London, Ontario, Canada
| | - Sylvia Redon
- Service de Génétique Médicale et de Biologie de la Reproduction, Centre Hospitalier Regional Universitaire Brest, Brest, France; Université de Brest, Inserm, EFS, UMR 1078, GGB, Brest, France
| | - Dmitrijs Rots
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Karen Rouault
- Service de Génétique Médicale et de Biologie de la Reproduction, Centre Hospitalier Regional Universitaire Brest, Brest, France; Université de Brest, Inserm, EFS, UMR 1078, GGB, Brest, France
| | - Ken Saida
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Jolanda Schieving
- Department of Pediatric Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marco Tartaglia
- Genetics and Rare Diseases Research Division, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Romano Tenconi
- Clinical Genetics Unit, Department of Women and Children's Health, University of Padova, Padova, Italy
| | - Kevin Uguen
- Service de Génétique Médicale et de Biologie de la Reproduction, Centre Hospitalier Regional Universitaire Brest, Brest, France
| | - Nienke Verbeek
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Christopher A Walsh
- Division of Genetics and Genomics and Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA
| | - Keren Yosovich
- Molecular Genetic Laboratory, Edith Wolfson Medical Center, Holon, Israel
| | - Christopher J Yuskaitis
- Division of Epilepsy and Clinical Neurophysiology and Epilepsy Genetics Program, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Giuseppe Zampino
- Center for Rare Diseases and Congenital Defects, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Faculty of Medicine and Surgery, Catholic University of Sacred Heart, Rome, Italy
| | - Bekim Sadikovic
- Department of Pathology and Laboratory Medicine, Western University, London, Ontario, Canada; Verspeeten Clinical Genome Centre, London Health Sciences Centre, London, Ontario, Canada.
| | - Mariëlle Alders
- Department of Human Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam Reproduction and Development Research Institute, Amsterdam, The Netherlands.
| | - Renske Oegema
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands.
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3
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Tessadori F, Duran K, Knapp K, Fellner M, Smithson S, Beleza Meireles A, Elting MW, Waisfisz Q, O’Donnell-Luria A, Nowak C, Douglas J, Ronan A, Brunet T, Kotzaeridou U, Svihovec S, Saenz MS, Thiffault I, Del Viso F, Devine P, Rego S, Tenney J, van Haeringen A, Ruivenkamp CA, Koene S, Robertson SP, Deshpande C, Pfundt R, Verbeek N, van de Kamp JM, Weiss JM, Ruiz A, Gabau E, Banne E, Pepler A, Bottani A, Laurent S, Guipponi M, Bijlsma E, Bruel AL, Sorlin A, Willis M, Powis Z, Smol T, Vincent-Delorme C, Baralle D, Colin E, Revencu N, Calpena E, Wilkie AO, Chopra M, Cormier-Daire V, Keren B, Afenjar A, Niceta M, Terracciano A, Specchio N, Tartaglia M, Rio M, Barcia G, Rondeau S, Colson C, Bakkers J, Mace PD, Bicknell LS, van Haaften G, van Haaften G. Recurrent de novo missense variants across multiple histone H4 genes underlie a neurodevelopmental syndrome. Am J Hum Genet 2022; 109:750-758. [PMID: 35202563 PMCID: PMC9069069 DOI: 10.1016/j.ajhg.2022.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/24/2021] [Accepted: 02/03/2022] [Indexed: 12/12/2022] Open
Abstract
Chromatin is essentially an array of nucleosomes, each of which consists of the DNA double-stranded fiber wrapped around a histone octamer. This organization supports cellular processes such as DNA replication, DNA transcription, and DNA repair in all eukaryotes. Human histone H4 is encoded by fourteen canonical histone H4 genes, all differing at the nucleotide level but encoding an invariant protein. Here, we present a cohort of 29 subjects with de novo missense variants in six H4 genes (H4C3, H4C4, H4C5, H4C6, H4C9, and H4C11) identified by whole-exome sequencing and matchmaking. All individuals present with neurodevelopmental features of intellectual disability and motor and/or gross developmental delay, while non-neurological features are more variable. Ten amino acids are affected, six recurrently, and are all located within the H4 core or C-terminal tail. These variants cluster to specific regions of the core H4 globular domain, where protein-protein interactions occur with either other histone subunits or histone chaperones. Functional consequences of the identified variants were evaluated in zebrafish embryos, which displayed abnormal general development, defective head organs, and reduced body axis length, providing compelling evidence for the causality of the reported disorder(s). While multiple developmental syndromes have been linked to chromatin-associated factors, missense-bearing histone variants (e.g., H3 oncohistones) are only recently emerging as a major cause of pathogenicity. Our findings establish a broader involvement of H4 variants in developmental syndromes.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Gijs van Haaften
- Department of Genetics, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, 3584 Utrecht, the Netherlands.
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4
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Bonardi CM, Heyne HO, Fiannacca M, Fitzgerald MP, Gardella E, Gunning B, Olofsson K, Lesca G, Verbeek N, Stamberger H, Striano P, Zara F, Mancardi MM, Nava C, Syrbe S, Buono S, Baulac S, Coppola A, Weckhuysen S, Schoonjans AS, Ceulemans B, Sarret C, Baumgartner T, Muhle H, des Portes V, Toulouse J, Nougues MC, Rossi M, Demarquay G, Ville D, Hirsch E, Maurey H, Willems M, de Bellescize J, Altuzarra CD, Villeneuve N, Bartolomei F, Picard F, Hornemann F, Koolen DA, Kroes HY, Reale C, Fenger CD, Tan WH, Dibbens L, Bearden DR, Møller RS, Rubboli G. KCNT1-related epilepsies and epileptic encephalopathies: phenotypic and mutational spectrum. Brain 2021; 144:3635-3650. [PMID: 34114611 DOI: 10.1093/brain/awab219] [Citation(s) in RCA: 25] [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: 03/21/2020] [Revised: 03/02/2021] [Accepted: 05/11/2021] [Indexed: 11/15/2022] Open
Abstract
Variants in KCNT1, encoding a sodium-gated potassium channel (subfamily T member 1), have been associated with a spectrum of epilepsies and neurodevelopmental disorders. These range from familial autosomal dominant or sporadic sleep-related hypermotor epilepsy ((AD)SHE) to epilepsy of infancy with migrating focal seizures (EIMFS) and include developmental and epileptic encephalopathies (DEE). This study aims to provide a comprehensive overview of the phenotypic and genotypic spectrum of KCNT1 mutation-related epileptic disorders in 248 individuals, including 66 unpreviously published and 182 published cases, the largest cohort reported so far. Four phenotypic groups emerged from our analysis: i) EIMFS (152 individuals, 33 previously unpublished); ii) DEE other than EIMFS (non-EIMFS DEE) (37 individuals, 17 unpublished); iii) (AD)SHE (53 patients, 14 unpublished); iv) other phenotypes (6 individuals, 2 unpublished). In our cohort of 66 new cases, the most common phenotypic features were: a) in EIMFS, heterogeneity of seizure types, including epileptic spasms, epilepsy improvement over time, no epilepsy-related deaths; b) in non-EIMFS DEE, possible onset with West syndrome, occurrence of atypical absences, possible evolution to DEE with SHE features; one case of sudden unexplained death in epilepsy (SUDEP); c) in (AD)SHE, we observed a high prevalence of drug-resistance, although seizure frequency improved with age in some individuals, appearance of cognitive regression after seizure onset in all patients, no reported severe psychiatric disorders, although behavioural/psychiatric comorbidities were reported in about 50% of the patients, SUDEP in one individual; d) other phenotypes in individuals with mutation of KCNT1 included temporal lobe epilepsy, and epilepsy with tonic-clonic seizures and cognitive regression. Genotypic analysis of the whole cohort of 248 individuals showed only missense mutations and one inframe deletion in KCNT1. Although the KCNT1 mutations in affected individuals were seen to be distributed among the different domains of the KCNT1 protein, genotype-phenotype considerations showed many of the (AD)SHE-associated mutations to be clustered around the RCK2 domain in the C-terminus, distal to the NADP domain. Mutations associated with EIMFS/non-EIMFS DEE did not show a particular pattern of distribution in the KCNT1 protein. Recurrent KCNT1 mutations were seen to be associated with both severe and less severe phenotypes. Our study further defines and broadens the phenotypic and genotypic spectrums of KCNT1-related epileptic conditions and emphasizes the increasingly important role of this gene in the pathogenesis of early onset DEEs as well as in focal epilepsies, namely (AD)SHE.
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Affiliation(s)
- Claudia M Bonardi
- Department of Epilepsy Genetics and Precision Medicine, Danish Epilepsy Centre, member of the ERN EpiCARE, 4293 Dianalund, Denmark.,Department of Woman's and Child's Health, University Hospital of Padua, 35100 Padua, Italy
| | - Henrike O Heyne
- Finnish Institute for Molecular Medicine: FIMM, University of Helsinki, 00290 Helsinki, Finland.,Program for Medical and Population Genetics, Broad Institute of MIT and Harvard, 02142 Cambridge, MA, USA
| | | | - Mark P Fitzgerald
- Division of Neurology, Departments of Neurology and Pediatrics, The Children's Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania, Philadelphia PA, USA
| | - Elena Gardella
- Department of Epilepsy Genetics and Precision Medicine, Danish Epilepsy Centre, member of the ERN EpiCARE, 4293 Dianalund, Denmark.,Institute of Regional Health Research, University of Southern Denmark, 5230 Odense, Denmark
| | - Boudewijn Gunning
- Stichting Epilepsie Instellingen Nederland, Zwolle, 8025 BV, The Netherlands
| | - Kern Olofsson
- Department of Pediatric Neurology, Danish Epilepsy Center, 4293 Dianalund, Denmark
| | - Gaétan Lesca
- Department of Genetics, Hospices Civils de Lyon, 69002 Bron, France.,Institut NeuroMyoGène, CNRS UMR 5310 - INSERM U1217, Université Claude Bernard Lyon 1, 69008 Lyon, France
| | - Nienke Verbeek
- Department of Genetics, University Medical Center, 3584 CX Utrecht, Netherlands
| | - Hannah Stamberger
- Neurogenetics Group, VIB-Center for Molecular Neurology, B-2610 Antwerp, Belgium.,Department of Neurology, University Hospital, 2650 Antwerp, Belgium
| | - Pasquale Striano
- IRCCS "G. Gaslini" Institute, University of Genoa, 16147 Genoa, Italy
| | - Federico Zara
- IRCCS "G. Gaslini" Institute, University of Genoa, 16147 Genoa, Italy
| | - Maria M Mancardi
- Child Neuropsychiatry Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy
| | - Caroline Nava
- Département de Génétique, APHP, GH Pitié-Salpêtrière, 75013 Paris, France
| | - Steffen Syrbe
- Division of Pediatric Epileptology, Centre for Paediatrics and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Salvatore Buono
- Neurology Division, Hospital of National Relevance (AORN), Santobono Pausilipon, 80122 Naples, Italy
| | - Stephanie Baulac
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, Inserm, CNRS, F-75013, Paris, France
| | - Antonietta Coppola
- Department of Neuroscience and Reproductive and Odontostomatological Sciences, Federico II University, 80138 Naples, Italy
| | - Sarah Weckhuysen
- Neurogenetics Group, VIB-Center for Molecular Neurology, B-2610 Antwerp, Belgium.,Department of Neurology, University Hospital, 2650 Antwerp, Belgium
| | - An-Sofie Schoonjans
- Department of Pediatric Neurology, Antwerp University Hospital, University of Antwerp, 2650 Edegem, Belgium
| | - Berten Ceulemans
- Department of Pediatric Neurology, Antwerp University Hospital, University of Antwerp, 2650 Edegem, Belgium
| | - Catherine Sarret
- Service de Neuropédiatrie, CHU de Clermont-Ferrand, 6310 Clermont-Ferrand, France
| | | | - Hiltrud Muhle
- Department of Neuropediatrics, University Medical Center Schleswig Holstein, 24105 Kiel, Germany
| | - Vincent des Portes
- Neuropaediatrics Department, Femme Mère Enfant Hospital, 69500 Lyon, France
| | - Joseph Toulouse
- Epileptology, Sleep Disorders and Functional Pediatric Neurology CHU Lyon, 69500 Bron, France
| | | | - Massimiliano Rossi
- Department of Genetics, Hospices Civils de Lyon, 69002 Bron, France.,Lyon Neuroscience Research Center (CRNL), INSERM U1028, CNRS UMR5292, GENDEV Team, Claude Bernard Lyon 1 University, 69675 Bron, France
| | - Geneviève Demarquay
- Service de neurologie fonctionnelle et épileptologie, Neurological Hospital, 69677 Bron, France.,Lyon Neuroscience Research Center (CRNL), INSERM U1028, CNRS UMR5292, NeuroPain, 69677 Bron, France
| | - Dorothée Ville
- Pediatric Neurology Department, Lyon University Hospital, 69500 Bron, France
| | - Edouard Hirsch
- Epilepsy Unit, Hautepierre Hospital, University of Strasbourg, 67100 Strasbourg, France
| | - Hélène Maurey
- Department of Pediatric Neurology, Hopital Bicêtre, Le Kremlin-Bicêtre, 94270 Paris, France
| | - Marjolaine Willems
- Department of Clinical Genetics, Arnaud de Villeneuve Hospital, 34090 Montpellier, France
| | - Julitta de Bellescize
- Department of Pediatric Clinical Epileptology, Sleep Disorders and Functional Neurology, Hospices Civils de Lyon, 69677 Bron, Lyon, France
| | | | - Nathalie Villeneuve
- Pediatric Neurology Department, Timone Children Hospital, 13005 Marseille, France
| | - Fabrice Bartolomei
- Epileptology Department, Timone Hospital, Public Assistance Hospitals of Marseille, Aix-Marseille University, 13005 Marseille, France
| | - Fabienne Picard
- Department of Clinical Neurosciences, University Hospitals and Faculty of Medicine, CH-1211 Geneva, Switzerland
| | - Frauke Hornemann
- Centre of Pediatric Research, Hospital for Children and Adolescents, 04103 Leipzig, Germany
| | - David A Koolen
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center (Radboudumc), 6525 GA Nijmegen, The Netherlands
| | - Hester Y Kroes
- Department of Genetics, University Medical Center, 3584 CX Utrecht, Netherlands
| | - Chiara Reale
- Department of Epilepsy Genetics and Precision Medicine, Danish Epilepsy Centre, member of the ERN EpiCARE, 4293 Dianalund, Denmark.,Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy
| | - Christina D Fenger
- Department of Epilepsy Genetics and Precision Medicine, Danish Epilepsy Centre, member of the ERN EpiCARE, 4293 Dianalund, Denmark
| | - Wen-Hann Tan
- Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Leanne Dibbens
- Epilepsy Research Group, UniSA Clinical and Health Sciences, University of South Australia, and Australian Centre for Precision Health, SA 5001 Adelaide, Australia
| | - David R Bearden
- Division of Child Neurology, Department of Neurology, University of Rochester School of Medicine, Rochester, NY14642, USA
| | - Rikke S Møller
- Department of Epilepsy Genetics and Precision Medicine, Danish Epilepsy Centre, member of the ERN EpiCARE, 4293 Dianalund, Denmark.,Institute of Regional Health Research, University of Southern Denmark, 5230 Odense, Denmark
| | - Guido Rubboli
- Department of Epilepsy Genetics and Precision Medicine, Danish Epilepsy Centre, member of the ERN EpiCARE, 4293 Dianalund, Denmark.,Institute of Clinical Medicine, University of Copenhagen, 2200 Copenhagen, Denmark
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5
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van der Sanden BPGH, Corominas J, de Groot M, Pennings M, Meijer RPP, Verbeek N, van de Warrenburg B, Schouten M, Yntema HG, Vissers LELM, Kamsteeg EJ, Gilissen C. Systematic analysis of short tandem repeats in 38,095 exomes provides an additional diagnostic yield. Genet Med 2021; 23:1569-1573. [PMID: 33846582 DOI: 10.1038/s41436-021-01174-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 12/31/2022] Open
Abstract
PURPOSE Expansions of a subset of short tandem repeats (STRs) have been implicated in approximately 30 different human genetic disorders. Despite extensive application of exome sequencing (ES) in routine diagnostic genetic testing, STRs are not routinely identified from these data. METHODS We assessed diagnostic utility of STR analysis in exome sequencing by applying ExpansionHunter to 2,867 exomes from movement disorder patients and 35,228 other clinical exomes. RESULTS We identified 38 movement disorder patients with a possible aberrant STR length. Validation by polymerase chain reaction (PCR) and/or repeat-primed PCR technologies confirmed the presence of aberrant expansion alleles for 13 (34%). For seven of these patients the genotype was compatible with the phenotypic description, resulting in a molecular diagnosis. We subsequently tested the remainder of our diagnostic ES cohort, including over 30 clinically and genetically heterogeneous disorders. Optimized manual curation yielded 167 samples with a likely aberrant STR length. Validations confirmed 93/167 (56%) aberrant expansion alleles, of which 48 were in the pathogenic range and 45 in the premutation range. CONCLUSION Our work provides guidance for the implementation of STR analysis in clinical ES. Our results show that systematic STR evaluation may increase diagnostic ES yield by 0.2%, and recommend making STR evaluation a routine part of ES interpretation in genetic testing laboratories.
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Affiliation(s)
- Bart P G H van der Sanden
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - Jordi Corominas
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - Michelle de Groot
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - Maartje Pennings
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - Rowdy P P Meijer
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - Nienke Verbeek
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Bart van de Warrenburg
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands
| | - Meyke Schouten
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - Helger G Yntema
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - Lisenka E L M Vissers
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - Erik-Jan Kamsteeg
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands.
| | - Christian Gilissen
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands. .,Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands.
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6
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Stamberger H, Hammer TB, Gardella E, Vlaskamp DRM, Bertelsen B, Mandelstam S, de Lange I, Zhang J, Myers CT, Fenger C, Afawi Z, Almanza Fuerte EP, Andrade DM, Balcik Y, Ben Zeev B, Bennett MF, Berkovic SF, Isidor B, Bouman A, Brilstra E, Busk ØL, Cairns A, Caumes R, Chatron N, Dale RC, de Geus C, Edery P, Gill D, Granild-Jensen JB, Gunderson L, Gunning B, Heimer G, Helle JR, Hildebrand MS, Hollingsworth G, Kharytonov V, Klee EW, Koeleman BPC, Koolen DA, Korff C, Küry S, Lesca G, Lev D, Leventer RJ, Mackay MT, Macke EL, McEntagart M, Mohammad SS, Monin P, Montomoli M, Morava E, Moutton S, Muir AM, Parrini E, Procopis P, Ranza E, Reed L, Reif PS, Rosenow F, Rossi M, Sadleir LG, Sadoway T, Schelhaas HJ, Schneider AL, Shah K, Shalev R, Sisodiya SM, Smol T, Stumpel CTRM, Stuurman K, Symonds JD, Mau-Them FT, Verbeek N, Verhoeven JS, Wallace G, Yosovich K, Zarate YA, Zerem A, Zuberi SM, Guerrini R, Mefford HC, Patel C, Zhang YH, Møller RS, Scheffer IE. NEXMIF encephalopathy: an X-linked disorder with male and female phenotypic patterns. Genet Med 2020; 23:363-373. [PMID: 33144681 DOI: 10.1038/s41436-020-00988-9] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/21/2020] [Accepted: 09/21/2020] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Pathogenic variants in the X-linked gene NEXMIF (previously KIAA2022) are associated with intellectual disability (ID), autism spectrum disorder, and epilepsy. We aimed to delineate the female and male phenotypic spectrum of NEXMIF encephalopathy. METHODS Through an international collaboration, we analyzed the phenotypes and genotypes of 87 patients with NEXMIF encephalopathy. RESULTS Sixty-three females and 24 males (46 new patients) with NEXMIF encephalopathy were studied, with 30 novel variants. Phenotypic features included developmental delay/ID in 86/87 (99%), seizures in 71/86 (83%) and multiple comorbidities. Generalized seizures predominated including myoclonic seizures and absence seizures (both 46/70, 66%), absence with eyelid myoclonia (17/70, 24%), and atonic seizures (30/70, 43%). Males had more severe developmental impairment; females had epilepsy more frequently, and varied from unaffected to severely affected. All NEXMIF pathogenic variants led to a premature stop codon or were deleterious structural variants. Most arose de novo, although X-linked segregation occurred for both sexes. Somatic mosaicism occurred in two males and a family with suspected parental mosaicism. CONCLUSION NEXMIF encephalopathy is an X-linked, generalized developmental and epileptic encephalopathy characterized by myoclonic-atonic epilepsy overlapping with eyelid myoclonia with absence. Some patients have developmental encephalopathy without epilepsy. Males have more severe developmental impairment. NEXMIF encephalopathy arises due to loss-of-function variants.
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Affiliation(s)
- Hannah Stamberger
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia.,Applied and Translational Neurogenomics group, Center for Molecular Neurology, VIB, and Department of Neurology, University Hospital of Antwerp, University of Antwerp, Antwerpen, Belgium
| | - Trine B Hammer
- Department of Epilepsy Genetics, Danish Epilepsy Centre Filadelfia, Dianalund, Denmark.,Clinical Genetic Department, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Elena Gardella
- Department of Epilepsy Genetics, Danish Epilepsy Centre Filadelfia, Dianalund, Denmark.,Institute for Regional Health Services Research, University of Southern Denmark, Odense, Denmark
| | - Danique R M Vlaskamp
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia.,University of Groningen, University Medical Center Groningen, Department of Neurology, Groningen, the Netherlands.,University of Groningen, University Medical Center Groningen, Department of Genetics, Groningen, The Netherlands
| | - Birgitte Bertelsen
- Center for Genomic Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Simone Mandelstam
- Royal Children's Hospital, Melbourne, VIC, Australia.,Murdoch Children's Research Institute, Melbourne, VIC, Australia.,Department of Pediatrics, University of Melbourne, Melbourne, VIC, Australia.,Department of Radiology, University of Melbourne, Melbourne, VIC, Australia.,Florey Institute of Neuroscience and Mental Health, Melbourne, VIC, Australia
| | - Iris de Lange
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Jing Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Candace T Myers
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Christina Fenger
- Department of Epilepsy Genetics, Danish Epilepsy Centre Filadelfia, Dianalund, Denmark
| | - Zaid Afawi
- Tel Aviv University Medical School, Tel Aviv, Israel
| | - Edith P Almanza Fuerte
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Danielle M Andrade
- Division of Neurology, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
| | - Yunus Balcik
- Epilepsy Center Frankfurt Rhine-Main, Center of Neurology and Neurosurgery, University Hospital Frankfurt, and Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Bruria Ben Zeev
- Edmond and Lily Safra Children's Hospital, Pediatric Neurology Unit, Tel-Hashomer, Israel.,Tel Aviv University, Sackler School of Medicine, Tel Aviv, Israel
| | - Mark F Bennett
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia.,The Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology University of Melbourne, Melbourne, VIC, Australia
| | - Samuel F Berkovic
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia
| | | | - Arjan Bouman
- Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Eva Brilstra
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Øyvind L Busk
- Section for Medical Genetics, Telemark Hospital, Skien, Norway
| | - Anita Cairns
- Department of Neurosciences, Queensland Children's Hospital, Brisbane, QLD, Australia
| | - Roseline Caumes
- Service de Neuropédiatrie, Pôle de Médecine et Spécialités Médicales, CHRU de Lille, Lille, France
| | - Nicolas Chatron
- Lyon University Hospitals, Departments of Genetics, Lyon, France
| | - Russell C Dale
- T.Y. Nelson Department of Neurology and Neurosurgery, The Children's Hospital at Westmead, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Christa de Geus
- University Medical Centre Groningen, Department of Genetics, Groningen, The Netherlands
| | - Patrick Edery
- Lyon University Hospitals, Departments of Genetics, Lyon, France.,INSERM U1028, CNRS UMR5292, Centre de Recherche en Neurosciences de Lyon, GENDEV Team, Bron, France
| | - Deepak Gill
- T.Y. Nelson Department of Neurology and Neurosurgery, The Children's Hospital at Westmead, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | | | - Lauren Gunderson
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN, USA
| | | | - Gali Heimer
- Edmond and Lily Safra Children's Hospital, Pediatric Neurology Unit, Tel-Hashomer, Israel.,Tel Aviv University, Sackler School of Medicine, Tel Aviv, Israel
| | - Johan R Helle
- Section for Medical Genetics, Telemark Hospital, Skien, Norway
| | - Michael S Hildebrand
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia.,Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Georgie Hollingsworth
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia
| | | | - Eric W Klee
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN, USA.,Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
| | - Bobby P C Koeleman
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - David A Koolen
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Christian Korff
- Pediatric Neurology Unit, University Hospitals, Geneva, Switzerland
| | - Sébastien Küry
- Service de génétique médicale, CHU Nantes, Nantes, France
| | - Gaetan Lesca
- Lyon University Hospitals, Departments of Genetics, Lyon, France
| | - Dorit Lev
- Tel Aviv University, Sackler School of Medicine, Tel Aviv, Israel.,Institute of Medical Genetics, Wolfson Medical Center, Holon, Israel
| | - Richard J Leventer
- Royal Children's Hospital, Melbourne, VIC, Australia.,Murdoch Children's Research Institute, Melbourne, VIC, Australia.,Department of Pediatrics, University of Melbourne, Melbourne, VIC, Australia
| | - Mark T Mackay
- Royal Children's Hospital, Melbourne, VIC, Australia.,Murdoch Children's Research Institute, Melbourne, VIC, Australia.,Department of Pediatrics, University of Melbourne, Melbourne, VIC, Australia
| | - Erica L Macke
- Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
| | - Meriel McEntagart
- Medical Genetics, St George's University Hospitals NHS FT, Cranmer Tce, London, United Kingdom
| | - Shekeeb S Mohammad
- T.Y. Nelson Department of Neurology and Neurosurgery, The Children's Hospital at Westmead, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Pauline Monin
- Lyon University Hospitals, Departments of Genetics, Lyon, France
| | - Martino Montomoli
- Department of Neuroscience, Pharmacology and Child Health, Children's Hospital A. Meyer and University of Florence, Florence, Italy
| | - Eva Morava
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN, USA.,Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
| | - Sebastien Moutton
- CPDPN, Pôle mère enfant, Maison de Santé Protestante Bordeaux Bagatelle, Talence, France.,INSERM UMR1231 GAD, FHU-TRANSLAD, Université de Bourgogne, Dijon, France
| | - Alison M Muir
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Elena Parrini
- Department of Neuroscience, Pharmacology and Child Health, Children's Hospital A. Meyer and University of Florence, Florence, Italy
| | - Peter Procopis
- T.Y. Nelson Department of Neurology and Neurosurgery, The Children's Hospital at Westmead, Faculty of Medicine and Health, University of Sydney, Sydney, Australia.,Discipline of Child and Adolescent Health, Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - Emmanuelle Ranza
- Medigenome, Swiss Institute of Genomic Medicine, Geneva, Switzerland
| | - Laura Reed
- Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Philipp S Reif
- Epilepsy Center Frankfurt Rhine-Main, Center of Neurology and Neurosurgery, University Hospital Frankfurt, and Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Felix Rosenow
- Epilepsy Center Frankfurt Rhine-Main, Center of Neurology and Neurosurgery, University Hospital Frankfurt, and Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Massimiliano Rossi
- Lyon University Hospitals, Departments of Genetics, Lyon, France.,INSERM U1028, CNRS UMR5292, Centre de Recherche en Neurosciences de Lyon, GENDEV Team, Bron, France
| | - Lynette G Sadleir
- Department of Paediatrics and Child Health, University of Otago Wellington, Wellington, New Zealand
| | - Tara Sadoway
- Division of Neurology, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
| | | | - Amy L Schneider
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia
| | | | - Ruth Shalev
- Neuropaediatric Unit, Shaare Zedek Medical Centre, Hebrew University School of Medicine, Jerusalem, Israel
| | - Sanjay M Sisodiya
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom and Chalfont Centre for Epilepsy, Bucks, UK
| | - Thomas Smol
- Institut de Génétique Médicale, Hopital Jeanne de Flandre, Lille University Hospital, Lille, France
| | - Connie T R M Stumpel
- Department of Clinical Genetics and GROW-School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Kyra Stuurman
- Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Joseph D Symonds
- Paediatric Neurosciences Research Group, Royal Hospital for Children, Glasgow, UK.,College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Frederic Tran Mau-Them
- UF Innovation en diagnostic genomique des maladies rares, CHU Dijon Bourgogne, Dijon, France.,INSERM UMR1231 GAD, Dijon, France
| | - Nienke Verbeek
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Judith S Verhoeven
- Academic Center for Epileptology, Kempenhaege, Department of Neurology, Heeze, The Netherlands
| | - Geoffrey Wallace
- Department of Neurosciences, Queensland Children's Hospital, Brisbane, QLD, Australia.,School of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Keren Yosovich
- Molecular Genetics Lab, Wolfson Medical Center, Holon, Israel
| | - Yuri A Zarate
- Section of Genetics and Metabolism, Department of Pediatrics, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, Little Rock, AR, USA
| | - Ayelet Zerem
- Tel Aviv University, Sackler School of Medicine, Tel Aviv, Israel.,White Matter Disease Care, Pediatric Neurology Unit, Dana-Dwak Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Sameer M Zuberi
- Paediatric Neurosciences Research Group, Royal Hospital for Children, Glasgow, UK.,College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Renzo Guerrini
- Department of Neuroscience, Pharmacology and Child Health, Children's Hospital A. Meyer and University of Florence, Florence, Italy
| | - Heather C Mefford
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Chirag Patel
- Genetic Health Queensland, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
| | - Yue-Hua Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Rikke S Møller
- Department of Epilepsy Genetics, Danish Epilepsy Centre Filadelfia, Dianalund, Denmark.,Institute for Regional Health Services Research, University of Southern Denmark, Odense, Denmark
| | - Ingrid E Scheffer
- Epilepsy Research Centre, Department of Medicine, Austin Health, University of Melbourne, Melbourne, VIC, Australia. .,Royal Children's Hospital, Melbourne, VIC, Australia. .,Murdoch Children's Research Institute, Melbourne, VIC, Australia. .,Department of Pediatrics, University of Melbourne, Melbourne, VIC, Australia. .,Florey Institute of Neuroscience and Mental Health, Melbourne, VIC, Australia.
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7
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Fitzgerald MP, Fiannacca M, Smith DM, Gertler TS, Gunning B, Syrbe S, Verbeek N, Stamberger H, Weckhuysen S, Ceulemans B, Schoonjans AS, Rossi M, Demarquay G, Lesca G, Olofsson K, Koolen DA, Hornemann F, Baulac S, Rubboli G, Minks KQ, Lee B, Helbig I, Dlugos D, Møller RS, Bearden D. Treatment Responsiveness in KCNT1-Related Epilepsy. Neurotherapeutics 2019; 16:848-857. [PMID: 31054119 PMCID: PMC6694367 DOI: 10.1007/s13311-019-00739-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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] [Indexed: 10/26/2022] Open
Abstract
Pathogenic variants in KCNT1 represent an important cause of treatment-resistant epilepsy, for which an effective therapy has been elusive. Reports about the effectiveness of quinidine, a candidate precision therapy, have been mixed. We sought to evaluate the treatment responsiveness of patients with KCNT1-related epilepsy. We performed an observational study of 43 patients using a collaborative KCNT1 patient registry. We assessed treatment efficacy based upon clinical seizure reduction, side effects of quinidine therapy, and variant-specific responsiveness to treatment. Quinidine treatment resulted in a > 50% seizure reduction in 20% of patients, with rare patients achieving transient seizure freedom. Multiple other therapies demonstrated some success in reducing seizure frequency, including the ketogenic diet and vigabatrin, the latter particularly in patients with epileptic spasms. Patients with the best quinidine response had variants that clustered distal to the NADP domain within the RCK2 domain of the protein. Half of patients did not receive a quinidine trial. In those who did, nearly half did not achieve therapeutic blood levels. More favorable response to quinidine in patients with KCNT1 variants distal to the NADP domain within the RCK2 domain may suggest a variant-specific response.
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Affiliation(s)
- Mark P Fitzgerald
- Division of Neurology, Departments of Neurology and Pediatrics, The Children's Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania, 3501 Civic Center Blvd, Philadelphia, PA, 19104, USA.
| | | | | | - Tracy S Gertler
- Division of Neurology, Department of Pediatrics, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - Boudewijn Gunning
- Stichting Epilepsie Instellingen Nederland, Zwolle, 8025 BV, Netherlands
| | - Steffen Syrbe
- Division of Child Neurology and Inherited Metabolic Diseases, Department of General Paediatrics, Centre for Paediatrics and Adolescent Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany
| | - Nienke Verbeek
- Department of Genetics, University Medical Center Utrecht, Utrecht, 3584 CX, The Netherlands
| | - Hannah Stamberger
- Neurogenetics group, Center for Molecular Neurology, Vlaams Instituut voor Biotechnologie, and Institute Born Bunge, University of Antwerp, Antwerp, 2000, Belgium
- Department of Neurology, Antwerp University Hospital, Antwerp, 2650, Belgium
| | - Sarah Weckhuysen
- Neurogenetics group, Center for Molecular Neurology, Vlaams Instituut voor Biotechnologie, and Institute Born Bunge, University of Antwerp, Antwerp, 2000, Belgium
- Department of Neurology, Antwerp University Hospital, Antwerp, 2650, Belgium
| | - Berten Ceulemans
- Department of Paediatric Neurology, Antwerp University Hospital, University of Antwerp, Antwerp, 2650, Belgium
| | - An-Sofie Schoonjans
- Neurogenetics Research Group, Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Laarbeeklaan 101, 1090, Brussels, Belgium
| | - Massimiliano Rossi
- Genetics department, Hospices Civils de Lyon, and Institut National de la Santé et de la Recherche Médicale U1028, Centre national de la recherche scientifique Unité Mixte de Recherche 5292, Lyon Neuroscience Research Center, GENDEV Team, Claude Bernard Lyon 1 University, Bron, 69500, France
| | - Geneviève Demarquay
- Department of Functional Neurology and Epileptology, Hospices Civils de Lyon and Centre national de la recherche scientifique, Unité Mixte de Recherche 5292, Lyon Neuroscience Research Center, Auditory Cognition and Psychoacoustics Team, Lyon, 69003, France
| | - Gaetan Lesca
- Genetics department, Hospices Civils de Lyon, and Institut National de la Santé et de la Recherche Médicale U1028, Centre national de la recherche scientifique Unité Mixte de Recherche 5292, Lyon Neuroscience Research Center, GENDEV Team, Claude Bernard Lyon 1 University, Bron, 69500, France
| | - Kern Olofsson
- Danish Epilepsy Centre, Filadelfia, Dianalund,, DK 4293, Denmark
| | - D A Koolen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, 6525 GA, The Netherlands
| | - Frauke Hornemann
- Centre of Pediatric Research, Hospital for Children and Adolescents, 04103, Leipzig, Germany
| | - Stephanie Baulac
- Sorbonne Université, UPMC Univ Paris 06, Unité Mixte de Recherche S 1127, F-75013, Paris, France
- Institut National de la Santé et de la Recherche Médicale, U1127, F-75013, Paris, France
- Centre national de la recherche scientifique, Unité Mixte de Recherche 7225, F-75013, Paris, France
- Institut du Cerveau et de la Moelle épinière (ICM), Hôpital Pitié-Salpêtrière, F-75013, Paris, France
- Department of Genetics, Assistance Publique des Hôpitaux de Paris (AP-HP), Hôpital Pitié-Salpêtrière, F-75013, Paris, France
| | - Guido Rubboli
- Danish Epilepsy Centre, Filadelfia, Dianalund,, DK 4293, Denmark
- University of Copenhagen, Copenhagen, 1165, Denmark
| | - Kelly Q Minks
- Division of Child Neurology, Department of Neurology, University of Rochester School of Medicine, Rochester, NY, USA
| | - Bohoon Lee
- Division of Child Neurology, Department of Neurology, University of Rochester School of Medicine, Rochester, NY, USA
| | - Ingo Helbig
- Division of Neurology, Departments of Neurology and Pediatrics, The Children's Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania, 3501 Civic Center Blvd, Philadelphia, PA, 19104, USA
| | - Dennis Dlugos
- Division of Neurology, Departments of Neurology and Pediatrics, The Children's Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania, 3501 Civic Center Blvd, Philadelphia, PA, 19104, USA
| | - Rikke S Møller
- Danish Epilepsy Centre, Filadelfia, Dianalund,, DK 4293, Denmark
- Institute for Regional Health Research, University of Southern Denmark, Odense, 5230, Denmark
| | - David Bearden
- Division of Child Neurology, Department of Neurology, University of Rochester School of Medicine, Rochester, NY, USA
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8
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Diets IJ, van der Donk R, Baltrunaite K, Waanders E, Reijnders MRF, Dingemans AJM, Pfundt R, Vulto-van Silfhout AT, Wiel L, Gilissen C, Thevenon J, Perrin L, Afenjar A, Nava C, Keren B, Bartz S, Peri B, Beunders G, Verbeek N, van Gassen K, Thiffault I, Cadieux-Dion M, Huerta-Saenz L, Wagner M, Konstantopoulou V, Vodopiutz J, Griese M, Boel A, Callewaert B, Brunner HG, Kleefstra T, Hoogerbrugge N, de Vries BBA, Hwa V, Dauber A, Hehir-Kwa JY, Kuiper RP, Jongmans MCJ. De Novo and Inherited Pathogenic Variants in KDM3B Cause Intellectual Disability, Short Stature, and Facial Dysmorphism. Am J Hum Genet 2019; 104:758-766. [PMID: 30929739 PMCID: PMC6451728 DOI: 10.1016/j.ajhg.2019.02.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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: 12/19/2018] [Accepted: 02/21/2019] [Indexed: 01/17/2023] Open
Abstract
By using exome sequencing and a gene matching approach, we identified de novo and inherited pathogenic variants in KDM3B in 14 unrelated individuals and three affected parents with varying degrees of intellectual disability (ID) or developmental delay (DD) and short stature. The individuals share additional phenotypic features that include feeding difficulties in infancy, joint hypermobility, and characteristic facial features such as a wide mouth, a pointed chin, long ears, and a low columella. Notably, two individuals developed cancer, acute myeloid leukemia and Hodgkin lymphoma, in childhood. KDM3B encodes for a histone demethylase and is involved in H3K9 demethylation, a crucial part of chromatin modification required for transcriptional regulation. We identified missense and truncating variants, suggesting that KDM3B haploinsufficiency is the underlying mechanism for this syndrome. By using a hybrid facial-recognition model, we show that individuals with a pathogenic variant in KDM3B have a facial gestalt, and that they show significant facial similarity compared to control individuals with ID. In conclusion, pathogenic variants in KDM3B cause a syndrome characterized by ID, short stature, and facial dysmorphism.
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Affiliation(s)
- Illja J Diets
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands
| | - Roos van der Donk
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Princess Máxima Center for Pediatric Oncology, 3584CS Utrecht, the Netherlands
| | - Kristina Baltrunaite
- Division of Endocrinology, Cincinnati Center for Growth Disorders, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Esmé Waanders
- Princess Máxima Center for Pediatric Oncology, 3584CS Utrecht, the Netherlands
| | - Margot R F Reijnders
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Department of Clinical Genetics, Maastricht University Medical Center, 6229HX Maastricht, the Netherlands
| | - Alexander J M Dingemans
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands
| | - Rolph Pfundt
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands
| | | | - Laurens Wiel
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands
| | - Christian Gilissen
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands
| | - Julien Thevenon
- Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs, Hôpital d'Enfants, Centre Hospitalier Universitaire de Dijon, 21079 Dijon, France; Equipe Génétique des Anomalies du Développement, Université de Bourgogne-France Comté, 21070 Dijon, France
| | - Laurence Perrin
- Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs, Hôpital d'Enfants, Centre Hospitalier Universitaire de Dijon, 21079 Dijon, France
| | - Alexandra Afenjar
- APHP, Département de Génétique et Embryologie Médicale, Centre de Référence Déficiences Intellectuelles de Causes Rares, GRC n°19, ConCer-LD, Hôpital Armand Trousseau, 75012 Paris, France
| | - Caroline Nava
- APHP, Hôpital Pitié-Salpêtrière, Département de Génétique, 75013, Paris, France; Sorbonne Universités, Institut du Cerveau et de la Moelle épinière, ICM, Institut National de la Santé et de la Recherche Médicale U1127, Centre National de la Recherche Scientifique UMR 7225, 75013, Paris, France
| | - Boris Keren
- APHP, Hôpital Pitié-Salpêtrière, Département de Génétique, 75013, Paris, France
| | - Sarah Bartz
- Division of Endocrinology, Children's Hospital of Colorado, Aurora, CO 80045, USA
| | - Bethany Peri
- Division of Endocrinology, Children's Hospital of Colorado, Aurora, CO 80045, USA
| | - Gea Beunders
- Department of Clinical Genetics, VU University Medical Center, 1081HV Amsterdam, the Netherlands
| | - Nienke Verbeek
- Department of Genetics, University Medical Center Utrecht, 3508AB Utrecht, the Netherlands
| | - Koen van Gassen
- Department of Genetics, University Medical Center Utrecht, 3508AB Utrecht, the Netherlands
| | - Isabelle Thiffault
- Center for Pediatric Genomic Medicine, Children's Mercy Hospital, Kansas City, MO 66211, USA; Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO 66211, USA; University of Missouri, Kansas City School of Medicine, Kansas City, MO 66211, USA
| | - Maxime Cadieux-Dion
- Center for Pediatric Genomic Medicine, Children's Mercy Hospital, Kansas City, MO 66211, USA; Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, MO 66211, USA
| | - Lina Huerta-Saenz
- Children's Mercy Hospital, Kansas City, MO 66211, USA; Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, Penn State Hershey Children's Hospital, Hershey, PA 17033, USA
| | - Matias Wagner
- Institute of Human Genetics, Technische Universität München, 80333 Munich, Germany; Institute for Neurogenomics, Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Vassiliki Konstantopoulou
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, 1090 Vienna, Austria
| | - Julia Vodopiutz
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, 1090 Vienna, Austria
| | - Matthias Griese
- Dr. von Hauner Children's Hospital, Division of Pediatric Pneumology, University Hospital Munich, German Center for Lung Research, 80333 Munich, Germany
| | - Annekatrien Boel
- Center for Medical Genetics, Ghent University Hospital, 9000 Ghent, Belgium
| | - Bert Callewaert
- Center for Medical Genetics, Ghent University Hospital, 9000 Ghent, Belgium
| | - Han G Brunner
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen, 6525GA Nijmegen, the Netherlands; Department of Clinical Genetics and School for Oncology & Developmental Biology (GROW), Maastricht University Medical Center, 6202AZ Maastricht, the Netherlands
| | - Tjitske Kleefstra
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen, 6525GA Nijmegen, the Netherlands
| | - Nicoline Hoogerbrugge
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands
| | - Bert B A de Vries
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands
| | - Vivian Hwa
- Division of Endocrinology, Cincinnati Center for Growth Disorders, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Andrew Dauber
- Division of Endocrinology, Cincinnati Center for Growth Disorders, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA; Division of Endocrinology, Children's National Health System, Washington, DC 20010, USA
| | - Jayne Y Hehir-Kwa
- Princess Máxima Center for Pediatric Oncology, 3584CS Utrecht, the Netherlands
| | - Roland P Kuiper
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Princess Máxima Center for Pediatric Oncology, 3584CS Utrecht, the Netherlands
| | - Marjolijn C J Jongmans
- Department of Human Genetics, Radboud University Medical Center, 6525GA Nijmegen, the Netherlands; Princess Máxima Center for Pediatric Oncology, 3584CS Utrecht, the Netherlands; Department of Genetics, University Medical Center Utrecht, 3508AB Utrecht, the Netherlands.
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9
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Verbeek N, Smyczek S, Wulff J, Bäumer C, Timmermann B, Brualla L. PO-0904 Benchmarking of a module for Monte Carlo simulation of proton transport in the PENELOPE code. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31324-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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10
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Reynhout S, Jansen S, Haesen D, van Belle S, de Munnik SA, Bongers EM, Schieving JH, Marcelis C, Amiel J, Rio M, Mclaughlin H, Ladda R, Sell S, Kriek M, Peeters-Scholte CM, Terhal PA, van Gassen KL, Verbeek N, Henry S, Schwoerer JS, Malik S, Revencu N, Ferreira CR, Macnamara E, Braakman HM, Brimble E, Ruzhnikov MR, Wagner M, Harrer P, Wieczorek D, Kuechler A, Tziperman B, Barel O, de Vries BB, Gordon CT, Janssens V, Vissers LE. De Novo Mutations Affecting the Catalytic Cα Subunit of PP2A, PPP2CA, Cause Syndromic Intellectual Disability Resembling Other PP2A-Related Neurodevelopmental Disorders. Am J Hum Genet 2019; 104:357. [PMID: 30735662 DOI: 10.1016/j.ajhg.2019.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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11
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Reynhout S, Jansen S, Haesen D, van Belle S, de Munnik SA, Bongers EM, Schieving JH, Marcelis C, Amiel J, Rio M, Mclaughlin H, Ladda R, Sell S, Kriek M, Peeters-Scholte CM, Terhal PA, van Gassen KL, Verbeek N, Henry S, Scott Schwoerer J, Malik S, Revencu N, Ferreira CR, Macnamara E, Braakman HM, Brimble E, Ruzhnikov MR, Wagner M, Harrer P, Wieczorek D, Kuechler A, Tziperman B, Barel O, de Vries BB, Gordon CT, Janssens V, Vissers LE. De Novo Mutations Affecting the Catalytic Cα Subunit of PP2A, PPP2CA, Cause Syndromic Intellectual Disability Resembling Other PP2A-Related Neurodevelopmental Disorders. Am J Hum Genet 2019; 104:139-156. [PMID: 30595372 DOI: 10.1016/j.ajhg.2018.12.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 12/06/2018] [Indexed: 12/11/2022] Open
Abstract
Type 2A protein phosphatases (PP2As) are highly expressed in the brain and regulate neuronal signaling by catalyzing phospho-Ser/Thr dephosphorylations in diverse substrates. PP2A holoenzymes comprise catalytic C-, scaffolding A-, and regulatory B-type subunits, which determine substrate specificity and physiological function. Interestingly, de novo mutations in genes encoding A- and B-type subunits have recently been implicated in intellectual disability (ID) and developmental delay (DD). We now report 16 individuals with mild to profound ID and DD and a de novo mutation in PPP2CA, encoding the catalytic Cα subunit. Other frequently observed features were severe language delay (71%), hypotonia (69%), epilepsy (63%), and brain abnormalities such as ventriculomegaly and a small corpus callosum (67%). Behavioral problems, including autism spectrum disorders, were reported in 47% of individuals, and three individuals had a congenital heart defect. PPP2CA de novo mutations included a partial gene deletion, a frameshift, three nonsense mutations, a single amino acid duplication, a recurrent mutation, and eight non-recurrent missense mutations. Functional studies showed complete PP2A dysfunction in four individuals with seemingly milder ID, hinting at haploinsufficiency. Ten other individuals showed mutation-specific biochemical distortions, including poor expression, altered binding to the A subunit and specific B-type subunits, and impaired phosphatase activity and C-terminal methylation. Four were suspected to have a dominant-negative mechanism, which correlated with severe ID. Two missense variants affecting the same residue largely behaved as wild-type in our functional assays. Overall, we found that pathogenic PPP2CA variants impair PP2A-B56(δ) functionality, suggesting that PP2A-related neurodevelopmental disorders constitute functionally converging ID syndromes.
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12
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de Kovel CGF, Syrbe S, Brilstra EH, Verbeek N, Kerr B, Dubbs H, Bayat A, Desai S, Naidu S, Srivastava S, Cagaylan H, Yis U, Saunders C, Rook M, Plugge S, Muhle H, Afawi Z, Klein KM, Jayaraman V, Rajagopalan R, Goldberg E, Marsh E, Kessler S, Bergqvist C, Conlin LK, Krok BL, Thiffault I, Pendziwiat M, Helbig I, Polster T, Borggraefe I, Lemke JR, van den Boogaardt MJ, Møller RS, Koeleman BPC. Neurodevelopmental Disorders Caused by De Novo Variants in KCNB1 Genotypes and Phenotypes. JAMA Neurol 2017; 74:1228-1236. [PMID: 28806457 DOI: 10.1001/jamaneurol.2017.1714] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Importance Knowing the range of symptoms seen in patients with a missense or loss-of-function variant in KCNB1 and how these symptoms correlate with the type of variant will help clinicians with diagnosis and prognosis when treating new patients. Objectives To investigate the clinical spectrum associated with KCNB1 variants and the genotype-phenotype correlations. Design, Setting, and Participants This study summarized the clinical and genetic information of patients with a presumed pathogenic variant in KCNB1. Patients were identified in research projects or during clinical testing. Information on patients from previously published articles was collected and authors contacted if feasible. All patients were seen at a clinic at one of the participating institutes because of presumed genetic disorder. They were tested in a clinical setting or included in a research project. Main Outcomes and Measures The genetic variant and its inheritance and information on the patient's symptoms and characteristics in a predefined format. All variants were identified with massive parallel sequencing and confirmed with Sanger sequencing in the patient. Absence of the variant in the parents could be confirmed with Sanger sequencing in all families except one. Results Of 26 patients (10 female, 15 male, 1 unknown; mean age at inclusion, 9.8 years; age range, 2-32 years) with developmental delay, 20 (77%) carried a missense variant in the ion channel domain of KCNB1, with a concentration of variants in region S5 to S6. Three variants that led to premature stops were located in the C-terminal and 3 in the ion channel domain. Twenty-one of 25 patients (84%) had seizures, with 9 patients (36%) starting with epileptic spasms between 3 and 18 months of age. All patients had developmental delay, with 17 (65%) experiencing severe developmental delay; 14 (82%) with severe delay had behavioral problems. The developmental delay was milder in 4 of 6 patients with stop variants and in a patient with a variant in the S2 transmembrane element rather than the S4 to S6 region. Conclusions and Relevance De novo KCNB1 missense variants in the ion channel domain and loss-of-function variants in this domain and the C-terminal likely cause neurodevelopmental disorders with or without seizures. Patients with presumed pathogenic variants in KCNB1 have a variable phenotype. However, the type and position of the variants in the protein are (imperfectly) correlated with the severity of the disorder.
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Affiliation(s)
- Carolien G F de Kovel
- Department of Genetics, University Medical Center Utrecht, Utrecht, the Netherlands.,Department of Language and Genetics, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
| | - Steffen Syrbe
- Division of Child Neurology and Inherited Metabolic Diseases, Department of General Pediatrics, Center for Pediatrics and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Eva H Brilstra
- Department of Genetics, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Nienke Verbeek
- Department of Genetics, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Bronwyn Kerr
- Institute of Evolution, Systems and Genomics, Faculty of Medical and Human Sciences, University of Manchester, Manchester, England.,Manchester Centre For Genomic Medicine, Central Manchester University Hospitals National Health Service Foundation Trust, Manchester, England.,Manchester Academic Health Science Centre, Manchester, England
| | - Holly Dubbs
- Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Allan Bayat
- Department of Pediatrics, University Hospital of Hvidovre, Copenhagen, Denmark
| | - Sonal Desai
- Department of Neurogenetics, Kennedy Krieger Institute, Baltimore, Maryland
| | - Sakkubai Naidu
- Department of Neurology and Pediatrics, Johns Hopkins School of Medicine, Baltimore, Maryland.,Hugo Moser Research Institute, Kennedy Krieger Institute, Baltimore, Maryland
| | | | - Hande Cagaylan
- Department of Molecular Biology and Genetics, Bogaziçi University, Istanbul, Turkey
| | - Uluc Yis
- Division of Child Neurology, Department of Pediatrics, School of Medicine, Dokuz Eylül University, İzmir, Turkey
| | - Carol Saunders
- Center for Pediatric Genomic Medicine, Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, Missouri.,Department of Pediatrics, Children's Mercy Hospital, Kansas City, Missouri.,Pediatric Pathology and Laboratory Medicine, University of Missouri-Kansas City School of Medicine, Kansas City
| | - Martin Rook
- Department of Medical Physiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Susanna Plugge
- Department of Biomedical Sciences, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Hiltrud Muhle
- Department of Neuropediatrics, University Medical Center Schleswig-Holstein, Christian Albrechts University, Kiel, Germany
| | - Zaid Afawi
- Department of Physiology and Pharmacology, Tel Aviv University Medical School, Ramat Aviv, Israel
| | - Karl-Martin Klein
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, Center of Neurology and Neurosurgery, University Hospital, Goethe-University Frankfurt, Frankfurt, Germany
| | - Vijayakumar Jayaraman
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Ramakrishnan Rajagopalan
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Ethan Goldberg
- Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Eric Marsh
- Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Sudha Kessler
- Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Christina Bergqvist
- Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Laura K Conlin
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Bryan L Krok
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Isabelle Thiffault
- Center for Pediatric Genomic Medicine, Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, Missouri.,Department of Pediatrics, Children's Mercy Hospital, Kansas City, Missouri
| | - Manuela Pendziwiat
- Department of Neuropediatrics, University Medical Center Schleswig-Holstein, Christian Albrechts University, Kiel, Germany
| | - Ingo Helbig
- Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,University Medical Center Schleswig-Holstein, Christian Albrechts University, Kiel, Germany
| | - Tilman Polster
- Epilepsiezentrum Bethel, Krankenhaus Mara, Kinderepileptologie, Bielefeld, Germany
| | - Ingo Borggraefe
- Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics Dr. von Hauner's Children's Hospital, University of Munich, Munich, Germany
| | - Johannes R Lemke
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, Leipzig, Germany
| | | | - Rikke S Møller
- Danish Epilepsy Centre, Dianalund, Denmark.,Institute for Regional Health Services, University of Southern Denmark, Odense, Denmark
| | - Bobby P C Koeleman
- Department of Genetics, University Medical Center Utrecht, Utrecht, the Netherlands
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13
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Wolff M, Johannesen KM, Hedrich UBS, Masnada S, Rubboli G, Gardella E, Lesca G, Ville D, Milh M, Villard L, Afenjar A, Chantot-Bastaraud S, Mignot C, Lardennois C, Nava C, Schwarz N, Gérard M, Perrin L, Doummar D, Auvin S, Miranda MJ, Hempel M, Brilstra E, Knoers N, Verbeek N, van Kempen M, Braun KP, Mancini G, Biskup S, Hörtnagel K, Döcker M, Bast T, Loddenkemper T, Wong-Kisiel L, Baumeister FM, Fazeli W, Striano P, Dilena R, Fontana E, Zara F, Kurlemann G, Klepper J, Thoene JG, Arndt DH, Deconinck N, Schmitt-Mechelke T, Maier O, Muhle H, Wical B, Finetti C, Brückner R, Pietz J, Golla G, Jillella D, Linnet KM, Charles P, Moog U, Õiglane-Shlik E, Mantovani JF, Park K, Deprez M, Lederer D, Mary S, Scalais E, Selim L, Van Coster R, Lagae L, Nikanorova M, Hjalgrim H, Korenke GC, Trivisano M, Specchio N, Ceulemans B, Dorn T, Helbig KL, Hardies K, Stamberger H, de Jonghe P, Weckhuysen S, Lemke JR, Krägeloh-Mann I, Helbig I, Kluger G, Lerche H, Møller RS. Genetic and phenotypic heterogeneity suggest therapeutic implications in SCN2A-related disorders. Brain 2017; 140:1316-1336. [DOI: 10.1093/brain/awx054] [Citation(s) in RCA: 311] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/18/2017] [Indexed: 11/13/2022] Open
Affiliation(s)
- Markus Wolff
- 1 Department of Pediatric Neurology and Developmental Medicine, University Children’s Hospital, Tübingen, Germany
| | - Katrine M. Johannesen
- 2 The Danish Epilepsy Centre, Dianalund, Denmark
- 3 Institute for Regional Health Services, University of Southern Denmark, Odense, Denmark
| | - Ulrike B. S. Hedrich
- 4 Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Silvia Masnada
- 5 Department of Brain and Behavior, University of Pavia, Italy
| | - Guido Rubboli
- 2 The Danish Epilepsy Centre, Dianalund, Denmark
- 6 University of Copenhagen, Copenhagen, Denmark
| | - Elena Gardella
- 2 The Danish Epilepsy Centre, Dianalund, Denmark
- 3 Institute for Regional Health Services, University of Southern Denmark, Odense, Denmark
| | - Gaetan Lesca
- 7 Department of Genetics, Lyon University Hospital, Lyon, France
- 8 Claude Bernard Lyon I University, Lyon, France
- 9 Lyon Neuroscience Research Centre, CNRS UMRS5292, INSERM U1028, Lyon, France
| | - Dorothée Ville
- 10 Department of Pediatric Neurology and Reference Center for Rare Children Epilepsy and Tuberous Sclerosis, Hôpital Femme Mere Enfant, Centre Hospitalier Universitaire de Lyon, HCL, France
| | - Mathieu Milh
- 11 APHM Service de neurologie pédiatrique, Marseille, France
- 12 Aix Marseille Univ, Inserm, GMGF, UMR-S 910, Marseille, France
| | - Laurent Villard
- 12 Aix Marseille Univ, Inserm, GMGF, UMR-S 910, Marseille, France
| | - Alexandra Afenjar
- 13 AP-HP, Unité de Gènètique Clinique, Hôpital Armand Trousseau, Groupe Hospitalier Universitaire de l’Est Parisien, Paris, France
| | - Sandra Chantot-Bastaraud
- 13 AP-HP, Unité de Gènètique Clinique, Hôpital Armand Trousseau, Groupe Hospitalier Universitaire de l’Est Parisien, Paris, France
| | - Cyril Mignot
- 14 AP-HP, Département de Génétique; Centre de Référence Défiences Intellectuelles de Causes Rares; Groupe de Recherche Clinique UPMC “Déficiences Intellectuelles et Autisme” GH Pitié-Salpêtrère, Paris, France
| | - Caroline Lardennois
- 15 Service de Pediatrie neonatale et Réanimation - Neuropediatrie, 76000 Rouen, France
| | - Caroline Nava
- 16 Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Inserm U 1127, CNRS UMR 7225, ICM, France
- 17 Department of Genetics, Pitié-Salpêtrière Hospital, AP-HP, F-75013 Paris, France
| | - Niklas Schwarz
- 4 Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | | | - Laurence Perrin
- 19 Department of Genetics, Robert Debré Hospital, AP-HP, Paris, France
| | - Diane Doummar
- 20 AP-HP, Service de Neuropédiatrie, Hôpital Trousseau, Paris, France
| | - Stéphane Auvin
- 21 Université Paris Diderot, Sorbonne Paris Cité, INSERM UMR1141, Paris, France
- 22 AP-HP, Hôpital Robert Debré, Service de Neurologie Pédiatrique, Paris, France
| | - Maria J. Miranda
- 23 Department of Pediatrics, Herlev University Hospital, Herlev, Denmark
| | - Maja Hempel
- 24 Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Eva Brilstra
- 25 Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Nine Knoers
- 25 Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Nienke Verbeek
- 25 Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marjan van Kempen
- 25 Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kees P. Braun
- 26 Department of Pediatric Neurology, Brain Center Rudolf Magnus, University Medical Center Utrecht, The Netherlands
| | - Grazia Mancini
- 27 Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Saskia Biskup
- 28 CeGaT - Center for Genomics and Transcriptomics, Tübingen, Germany
| | | | - Miriam Döcker
- 28 CeGaT - Center for Genomics and Transcriptomics, Tübingen, Germany
| | | | - Tobias Loddenkemper
- 30 Division of Epilepsy and Clinical Neurophysiology, Boston Children’s Hospital, Harvard Medical School, Boston MA, USA
| | - Lily Wong-Kisiel
- 31 Division of Child and Adolescent Neurology, Department of Neurology, Mayo Clinic, Rochester MN, USA
| | | | - Walid Fazeli
- 33 Pediatric Neurology, University Hospital Cologne, Germany
| | - Pasquale Striano
- 34 Pediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, and Maternal and Child Health, University of Genoa ‘G. Gaslini’ Institute, Genova, Italy
| | - Robertino Dilena
- 35 Servizio di Epilettologia e Neurofisiopatologia Pediatrica, UO Neurofisiopatologia, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milano, Italy
| | - Elena Fontana
- 36 Centro di Diagnosi e Cura delle Epilessie Infantili, Azienda Ospedaliera -Policlinico Gianbattista Rossi, Verona, Italy
| | - Federico Zara
- 37 Laboratory of Neurogenetics and Neuroscience, Department of Neuroscience, “G. Gaslini” Institute, Genova, Italy
| | - Gerhard Kurlemann
- 38 Department of Pediatric Neurology, University Children’s Hospital, Münster, Germany
| | - Joerg Klepper
- 39 Children’s Hospital, Klinikum Aschaffenburg, Germany
| | - Jess G. Thoene
- 40 University of Michigan, Pediatric Genetics, Ann Arbor, MI USA
| | - Daniel H. Arndt
- 41 Division of Pediatric Neurology and Epilepsy – Beaumont Children’s Hospital, William Beaumont Oakland University School of Medicine, Royal Oak, Michigan, USA
| | - Nicolas Deconinck
- 42 Department of Neurology, Hôpital Universitaire des Enfants Reine Fabiola, Université Libre de Bruxelles, Brussels, Belgium
| | - Thomas Schmitt-Mechelke
- 43 Children’s Hospital Lucerne, Luzerner Kantonsspital, Kinderspital Luzern, CH-6000 Luzern 16, Switzerland
| | - Oliver Maier
- 44 Department of child neurology, Children’s Hospital, St. Gallen, Switzerland
| | - Hiltrud Muhle
- 45 Department of Neuropediatrics, University Medical Center Schleswig-Holstein, Christian-Albrechts University, Kiel, Germany
| | - Beverly Wical
- 46 Gillette Children’s Specialty Healthcare, Saint Paul, MN, USA
| | - Claudio Finetti
- 47 Klinik für Kinder- und Jugendmedizin, Elisabeth-Krankenhaus, Essen, Germany
| | | | - Joachim Pietz
- 49 Pediatric Practice University Medical Center for Children and Adolescents, Angelika Lautenschläger Children’s Hospital, Heidelberg, Germany
| | - Günther Golla
- 50 Klinik für Kinder- und Jugendmedizin, Klinikum Lippe GmbH, Detmold, Germany
| | - Dinesh Jillella
- 51 Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children’s Hospital, Boston, MA, USA
| | - Karen M. Linnet
- 52 Department of Pediatrics, Aarhus University hospital, Aarhus, Denmark
| | - Perrine Charles
- 53 Department of Genetics and Cytogenetics, Assistance Publique-Hôpitaux de Paris, Groupe Hospitalier Pitié-Salpêtrière Charles-Foix, Paris, France
| | - Ute Moog
- 54 Institute of Genetics, University Hospital, Heidelberg, Germany
| | - Eve Õiglane-Shlik
- 55 Children’s Clinic, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - John F. Mantovani
- 56 Department of Pediatrics and Mercy Kids Autism Center, Mercy Children’s Hospital, St. Louis, Missouri, USA
| | - Kristen Park
- 57 Department of Pediatrics and Neurology, Children’s Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA
| | - Marie Deprez
- 58 Centre de Génétique Humaine, Institut de Pathologie et Génétique, Gosselies, Belgium
| | - Damien Lederer
- 58 Centre de Génétique Humaine, Institut de Pathologie et Génétique, Gosselies, Belgium
| | - Sandrine Mary
- 58 Centre de Génétique Humaine, Institut de Pathologie et Génétique, Gosselies, Belgium
| | - Emmanuel Scalais
- 59 Pediatric Neurology Unit, Pediatric Department, Centre Hospitalier de Luxembourg, Luxembourg
| | - Laila Selim
- 60 Department of Pediatrics, Pediatric Neurology and Neurometabolic Unit, Cairo University Children Hospital, Cairo, Egypt
| | - Rudy Van Coster
- 61 Department of Pediatrics, Division of Pediatric Neurology and Metabolism, Ghent University Hospital, Ghent, Belgium
| | - Lieven Lagae
- 62 Department of Development and Regeneration, Section Pediatric Neurology, University Hospital KU Leuven, Leuven, Belgium
| | | | - Helle Hjalgrim
- 2 The Danish Epilepsy Centre, Dianalund, Denmark
- 3 Institute for Regional Health Services, University of Southern Denmark, Odense, Denmark
| | - G. Christoph Korenke
- 63 Zentrum für Kinder- und Jugendmedizin (Elisabeth Kinderkrankenhaus), Klinik für Neuropädiatrie u. Angeborene, Stoffwechselerkrankungen, Oldenburg, Germany
| | - Marina Trivisano
- 64 Neurology Unit, Department of Neuroscience, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy
| | - Nicola Specchio
- 64 Neurology Unit, Department of Neuroscience, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy
| | - Berten Ceulemans
- 65 Paediatric Neurology University Hospital and University of Antwerp, Wilrijkstraat 10, 2650 Edegem, Belgium
| | - Thomas Dorn
- 66 Swiss Epilepsy Center, Zurich, Switzerland
| | - Katherine L. Helbig
- 67 Division of Clinical Genomics, Ambry Genetics, Aliso Viejo, California, USA
| | - Katia Hardies
- 68 Neurogenetics Group, Center for Molecular Neurology, VIB, Antwerp, Belgium
- 69 Laboratory of Neurogenetics, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium
| | - Hannah Stamberger
- 68 Neurogenetics Group, Center for Molecular Neurology, VIB, Antwerp, Belgium
- 69 Laboratory of Neurogenetics, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium
- 70 Division of Neurology, University Hospital Antwerp (UZA), Antwerp, Belgium
| | - Peter de Jonghe
- 68 Neurogenetics Group, Center for Molecular Neurology, VIB, Antwerp, Belgium
- 69 Laboratory of Neurogenetics, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium
- 70 Division of Neurology, University Hospital Antwerp (UZA), Antwerp, Belgium
| | - Sarah Weckhuysen
- 68 Neurogenetics Group, Center for Molecular Neurology, VIB, Antwerp, Belgium
- 69 Laboratory of Neurogenetics, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium
- 70 Division of Neurology, University Hospital Antwerp (UZA), Antwerp, Belgium
| | - Johannes R. Lemke
- 71 Institute of Human Genetics, University of Leipzig Hospitals and Clinics, Leipzig, Germany
| | - Ingeborg Krägeloh-Mann
- 1 Department of Pediatric Neurology and Developmental Medicine, University Children’s Hospital, Tübingen, Germany
| | - Ingo Helbig
- 45 Department of Neuropediatrics, University Medical Center Schleswig-Holstein, Christian-Albrechts University, Kiel, Germany
- 72 Division of Neurology, The Children’s Hospital of Philadelphia, Philadelphia, USA
| | - Gerhard Kluger
- 73 Neuropediatric Clinic and Clinic for Neurorehabilitation, Epilepsy Center for Children and Adolescents, Schoen Klinik, Vogtareuth, Germany
- 74 PMU Salzburg, Austria
| | - Holger Lerche
- 4 Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Rikke S Møller
- 2 The Danish Epilepsy Centre, Dianalund, Denmark
- 3 Institute for Regional Health Services, University of Southern Denmark, Odense, Denmark
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Verbeek N, Kasteleijn-Nolst Trenité D, Wassenaar M, van Campen J, Sonsma A, Gunning WB, de Weerd A, Knoers N, Spetgens W, Gutter T, Leijten F, Brilstra E. Photosensitivity in Dravet syndrome is under-recognized and related to prognosis. Clin Neurophysiol 2017; 128:323-330. [DOI: 10.1016/j.clinph.2016.11.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/27/2016] [Accepted: 11/24/2016] [Indexed: 11/25/2022]
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15
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Mirzaa G, Parry DA, Fry AE, Giamanco KA, Schwartzentruber J, Vanstone M, Logan CV, Roberts N, Johnson CA, Singh S, Kholmanskikh SS, Adams C, Hodge RD, Hevner RF, Bonthron DT, Braun KPJ, Faivre L, Rivière JB, St-Onge J, Gripp KW, Mancini GM, Pang K, Sweeney E, van Esch H, Verbeek N, Wieczorek D, Steinraths M, Majewski J, Boycot KM, Pilz DT, Ross ME, Dobyns WB, Sheridan EG. De novo CCND2 mutations leading to stabilization of cyclin D2 cause megalencephaly-polymicrogyria-polydactyly-hydrocephalus syndrome. Nat Genet 2014; 46:510-515. [PMID: 24705253 PMCID: PMC4004933 DOI: 10.1038/ng.2948] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 03/12/2014] [Indexed: 12/15/2022]
Affiliation(s)
- Ghayda Mirzaa
- Department of Pediatrics, University of Washington; and Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA
| | - David A Parry
- Leeds Institute of Biomedical and Clinical Science, Wellcome Trust Brenner Building, St James's University Hospital, Leeds LS9 7TF, UK
| | - Andrew E Fry
- Institute of Medical Genetics, University Hospital of Wales, Cardiff, UK
| | - Kristin A Giamanco
- Neurogenetics and Development, Feil Family Brain and Mind Research institute, Weill Cornell Medical College, New York, NY
| | | | - Megan Vanstone
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Clare V Logan
- Leeds Institute of Biomedical and Clinical Science, Wellcome Trust Brenner Building, St James's University Hospital, Leeds LS9 7TF, UK
| | - Nicola Roberts
- Leeds Institute of Biomedical and Clinical Science, Wellcome Trust Brenner Building, St James's University Hospital, Leeds LS9 7TF, UK
| | - Colin A Johnson
- Leeds Institute of Biomedical and Clinical Science, Wellcome Trust Brenner Building, St James's University Hospital, Leeds LS9 7TF, UK
| | - Shawn Singh
- Neurogenetics and Development, Feil Family Brain and Mind Research institute, Weill Cornell Medical College, New York, NY
| | - Stanislav S Kholmanskikh
- Neurogenetics and Development, Feil Family Brain and Mind Research institute, Weill Cornell Medical College, New York, NY
| | - Carissa Adams
- Department of Pediatrics, University of Washington; and Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA
| | - Rebecca D Hodge
- Department of Pediatrics, University of Washington; and Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA
| | - Robert F Hevner
- Departments of Neurological Surgery and Pathology, University of Washington; and Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle
| | - David T Bonthron
- Leeds Institute of Biomedical and Clinical Science, Wellcome Trust Brenner Building, St James's University Hospital, Leeds LS9 7TF, UK
| | - Kees P J Braun
- Department of Child Neurology, UMC Utrecht, Utrecht, The Netherlands
| | - Laurence Faivre
- Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs, Hôpital d'Enfants, CHU Dijon, Université de Bourgogne, Dijon F-21000, France
| | | | - Judith St-Onge
- Université de Bourgogne Equipe GAD, EA 4271 Dijon F-21000 France
| | - Karen W Gripp
- Division of Medical Genetics, A. I. duPont Hospital for Children, Wilmington, Delaware
| | - Grazia Ms Mancini
- Department of Clinical Genetics and Expertise Centre for Neurodevelopmental Disorders, Erasmus University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Ki Pang
- Department of Paediatric Neurology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
| | - Elizabeth Sweeney
- Department of Clinical Genetics, Liverpool Women's NHS Foundation Trust, Liverpool, UK
| | - Hilde van Esch
- Centre for Human Genetics, University Hospital Gasthuisberg, Herestraat, Leuven, Belgium
| | - Nienke Verbeek
- Department of Medical Genetics, UMC Utrecht, Utrecht, The Netherlands
| | - Dagmar Wieczorek
- Institut fur Humangenetik, Universitatsklinikum Essen, Essen, Germany
| | - Michelle Steinraths
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Jacek Majewski
- Mcgill University and Genome Quebec Innovation centre, Montreal, QC H3A 1A4, Canada
| | | | - Kym M Boycot
- Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Daniela T Pilz
- Institute of Medical Genetics, University Hospital of Wales, Cardiff, UK
| | - M Elizabeth Ross
- Neurogenetics and Development, Feil Family Brain and Mind Research institute, Weill Cornell Medical College, New York, NY
| | - William B Dobyns
- Department of Pediatrics, University of Washington; and Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA
| | - Eamonn G Sheridan
- Leeds Institute of Biomedical and Clinical Science, Wellcome Trust Brenner Building, St James's University Hospital, Leeds LS9 7TF, UK
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van Vliet R, Breedveld G, de Rijk-van Andel J, Brilstra E, Verbeek N, Verschuuren-Bemelmans C, Boon M, Samijn J, Diderich K, van de Laar I, Oostra B, Bonifati V, Maat-Kievit A. PRRT2 phenotypes and penetrance of paroxysmal kinesigenic dyskinesia and infantile convulsions. Neurology 2012; 79:777-84. [PMID: 22875091 DOI: 10.1212/wnl.0b013e3182661fe3] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To describe the phenotypes and penetrance of paroxysmal kinesigenic dyskinesia (PKD), a movement disorder characterized by attacks of involuntary movements occurring after sudden movements, infantile convulsion and choreoathetosis (ICCA) syndrome, and benign familial infantile convulsions (BFIC), caused by PRRT2 mutations. METHODS We performed clinical and genetic studies in 3 large families with ICCA, 2 smaller families with PKD, and 4 individuals with sporadic PKD. Migraine was also present in several individuals. RESULTS We detected 3 different PRRT2 heterozygous mutations: the recurrent p.Arg217Profs*8 mutation, previously reported, was identified in 2 families with ICCA, 2 families with PKD, and one individual with sporadic PKD; one novel missense mutation (p.Ser275Phe) was detected in the remaining family with ICCA; and one novel truncating mutation (p.Arg217*) was found in one individual with sporadic PKD. In the 2 remaining individuals with sporadic PKD, PRRT2 mutations were not detected. Importantly, PRRT2 mutations did not cosegregate with febrile convulsions or with migraine. The estimated penetrance of PRRT2 mutations was 61%, if only the PKD phenotype was considered; however, if infantile convulsions were also taken into account, the penetrance was nearly complete. Considering our findings and those reported in literature, 23 PRRT2 mutations explain ∼56% of the families analyzed. CONCLUSIONS PRRT2 mutations are the major cause of PKD or ICCA, but they do not seem to be involved in the etiology of febrile convulsions and migraine. The identification of PRRT2 as a major gene for the PKD-ICCA-BFIC spectrum allows better disease classification, molecular confirmation of the clinical diagnosis, and genetic testing and counseling.
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Affiliation(s)
- Rianne van Vliet
- Department of Clinical Genetics, Erasmus MC, Rotterdam, the Netherlands
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Abstract
Spinal cord injury is a common occurrence in Zimbabwe and carries with it a high morbidity and mortality. In the past almost all patients discharged from hospital were dead within a year. Reasons for this high mortality are presented. The establishment of the National Rehabilitation Centre has had a profound impact on the survival of these individuals as well as on improving their quality of life. The results of a retrospective survey on the mortality and life situation of individuals with spinal cord injuries sustained through trauma are presented. However major unresolved problems are inadequate housing, lack of financial support, practically no prospect of employment and depression compounded by boredom.
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Affiliation(s)
- L F Levy
- Department of Surgery, Medical School, Avondale, Harare, Zimbabwe
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