1
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Courraud J, Engel C, Quartier A, Drouot N, Houessou U, Plassard D, Sorlin A, Brischoux-Boucher E, Gouy E, Van Maldergem L, Rossi M, Lesca G, Edery P, Putoux A, Bilan F, Gilbert-Dussardier B, Atallah I, Kalscheuer VM, Mandel JL, Piton A. Molecular consequences of PQBP1 deficiency, involved in the X-linked Renpenning syndrome. Mol Psychiatry 2023:10.1038/s41380-023-02323-5. [PMID: 38030819 DOI: 10.1038/s41380-023-02323-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 10/18/2023] [Accepted: 11/13/2023] [Indexed: 12/01/2023]
Abstract
Mutations in the PQBP1 gene (polyglutamine-binding protein-1) are responsible for a syndromic X-linked form of neurodevelopmental disorder (XL-NDD) with intellectual disability (ID), named Renpenning syndrome. PQBP1 encodes a protein involved in transcriptional and post-transcriptional regulation of gene expression. To investigate the consequences of PQBP1 loss, we used RNA interference to knock-down (KD) PQBP1 in human neural stem cells (hNSC). We observed a decrease of cell proliferation, as well as the deregulation of the expression of 58 genes, comprising genes encoding proteins associated with neurodegenerative diseases, playing a role in mRNA regulation or involved in innate immunity. We also observed an enrichment of genes involved in other forms of NDD (CELF2, APC2, etc). In particular, we identified an increase of a non-canonical isoform of another XL-NDD gene, UPF3B, an actor of nonsense mRNA mediated decay (NMD). This isoform encodes a shorter protein (UPF3B_S) deprived from the domains binding NMD effectors, however no notable change in NMD was observed after PQBP1-KD in fibroblasts containing a premature termination codon. We showed that short non-canonical and long canonical UPF3B isoforms have different interactomes, suggesting they could play distinct roles. The link between PQBP1 loss and increase of UPF3B_S expression was confirmed in mRNA obtained from patients with pathogenic variants in PQBP1, particularly pronounced for truncating variants and missense variants located in the C-terminal domain. We therefore used it as a molecular marker of Renpenning syndrome, to test the pathogenicity of variants of uncertain clinical significance identified in PQPB1 in individuals with NDD, using patient blood mRNA and HeLa cells expressing wild-type or mutant PQBP1 cDNA. We showed that these different approaches were efficient to prove a functional effect of variants in the C-terminal domain of the protein. In conclusion, our study provided information on the pathological mechanisms involved in Renpenning syndrome, but also allowed the identification of a biomarker of PQBP1 deficiency useful to test variant effect.
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Affiliation(s)
- Jérémie Courraud
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France
- Université de Strasbourg, 67 400, Illkirch, France
| | - Camille Engel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France
- Université de Strasbourg, 67 400, Illkirch, France
| | - Angélique Quartier
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France
- Université de Strasbourg, 67 400, Illkirch, France
| | - Nathalie Drouot
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France
- Université de Strasbourg, 67 400, Illkirch, France
| | - Ursula Houessou
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France
- Université de Strasbourg, 67 400, Illkirch, France
| | - Damien Plassard
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France
- Université de Strasbourg, 67 400, Illkirch, France
| | - Arthur Sorlin
- National Center of Genetics, Laboratoire national de santé, Dudelange, Luxembourg
| | - Elise Brischoux-Boucher
- Centre de Génétique Humaine, CHU Besançon, Université de Franche-Comté, 25056, Besançon, France
| | - Evan Gouy
- Genetics Department, University Hospital of Lyon, Bron, 69500, France
| | - Lionel Van Maldergem
- Centre de Génétique Humaine, CHU Besançon, Université de Franche-Comté, 25056, Besançon, France
| | - Massimiliano Rossi
- Genetics Department, University Hospital of Lyon, Bron, 69500, France
- Equipe GENDEV, CRNL, Inserm U1028, CNRS UMR 5292, UCB Lyon1, Illkirch, France
| | - Gaetan Lesca
- Genetics Department, University Hospital of Lyon, Bron, 69500, France
- Equipe GENDEV, CRNL, Inserm U1028, CNRS UMR 5292, UCB Lyon1, Illkirch, France
| | - Patrick Edery
- Genetics Department, University Hospital of Lyon, Bron, 69500, France
- Equipe GENDEV, CRNL, Inserm U1028, CNRS UMR 5292, UCB Lyon1, Illkirch, France
| | - Audrey Putoux
- Genetics Department, University Hospital of Lyon, Bron, 69500, France
- Equipe GENDEV, CRNL, Inserm U1028, CNRS UMR 5292, UCB Lyon1, Illkirch, France
| | - Frederic Bilan
- Service de génétique médicale, CHU de Poitiers, 86 000, Poitiers, France
| | | | - Isis Atallah
- Department of Medical Genetics, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | | | - Jean-Louis Mandel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France
- Université de Strasbourg, 67 400, Illkirch, France
| | - Amélie Piton
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.
- Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.
- Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.
- Université de Strasbourg, 67 400, Illkirch, France.
- Genetic diagnosis laboratory, Strasbourg University Hospital, 67 090, Strasbourg, France.
- Institut Universitaire de France, Paris, France.
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2
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Harris SC, Chong K, Chitayat D, Gilmore KL, Jorge AAL, Freire BL, Lerario A, Shannon P, Cope H, Gallentine WB, Le Guyader G, Bilan F, Létard P, Davis EE, Vora NL. Diagnosis of TBC1D32-associated conditions: Expanding the phenotypic spectrum of a complex ciliopathy. Am J Med Genet A 2023; 191:1282-1292. [PMID: 36826837 DOI: 10.1002/ajmg.a.63150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 01/25/2023] [Accepted: 02/03/2023] [Indexed: 02/25/2023]
Abstract
Exome sequencing is a powerful tool in prenatal and postnatal genetics and can help identify novel candidate genes critical to human development. We describe seven unpublished probands with rare likely pathogenic variants or variants of uncertain significance that segregate with recessive disease in TBC1D32, including four fetal probands in three unrelated pedigrees and three pediatric probands in unrelated pedigrees. We also report clinical comparisons with seven previously published patients. Index probands were identified through an ongoing prenatal exome sequencing study and through an online data sharing platform (Gene Matcher™). A literature review was also completed. TBC1D32 is involved in the development and function of cilia and is expressed in the developing hypothalamus and pituitary gland. We provide additional data to expand the phenotype correlated with TBC1D32 variants, including a severe prenatal phenotype associated with life-limiting congenital anomalies.
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Affiliation(s)
- Sarah C Harris
- Department of Obstetrics and Gynecology, Prisma Health, University of South Carolina Greenville, Greenville, South Carolina, USA
| | - Karen Chong
- The Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynecology, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - David Chitayat
- The Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynecology, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Kelly L Gilmore
- Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Alexander A L Jorge
- Unidade de Endocrinologia Genética (LIM25) e Laboratório de Endocrinologia Celular e Molecular, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Sao Paulo, Brazil
| | - Bruna L Freire
- Unidade de Endocrinologia do Desenvolvimento, Laboratorio de Hormonios e Genetica Molecular (LIM42), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | - Antonio Lerario
- Department of Internal Medicine, Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, Michigan, USA
| | - Patrick Shannon
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Heidi Cope
- Center for Human Disease Modeling, Duke University, Durham, North Carolina, USA
| | - William B Gallentine
- Department of Neurology and Pediatrics, Stanford University, Lucile Packard Children's Hospital, Palo Alto, California, USA
| | | | - Frederic Bilan
- Service de génétique clinique, CHU de Poitiers, Poitiers, France.,Laboratoire de Neurosciences Expérimentales et Cliniques, INSERM U1084, Université de Poitiers, Poitiers, France
| | - Pascaline Létard
- Service de génétique clinique, CHU de Poitiers, Poitiers, France
| | - Erica E Davis
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.,Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.,Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
| | - Neeta L Vora
- Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
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3
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Deshwar AR, Cytrynbaum C, Murthy H, Zon J, Chitayat D, Volpatti J, Newbury-Ecob R, Ellard S, Lango Allen H, Yu EP, Noche R, Walker S, Scherer SW, Mahida S, Elitt CM, Nicolas G, Goldenberg A, Saugier-Veber P, Lecoquierre F, Dabaj I, Meddaugh H, Marble M, Keppler-Noreuil KM, Drayson L, Barañano KW, Chassevent A, Agre K, Létard P, Bilan F, Le Guyader G, Laquerrière A, Ramsey K, Henderson L, Brady L, Tarnopolsky M, Bainbridge M, Friedman J, Capri Y, Athayde L, Kok F, Gurgel-Giannetti J, Ramos LLP, Blaser S, Dowling JJ, Weksberg R. Variants in CLDN5 cause a syndrome characterized by seizures, microcephaly and brain calcifications. Brain 2022:6881740. [PMID: 36477332 DOI: 10.1093/brain/awac461] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 11/17/2022] [Accepted: 11/19/2022] [Indexed: 12/12/2022] Open
Abstract
The blood brain barrier ensures central nervous system homeostasis and protection from injury. Claudin-5 (CLDN5), an important component of tight junctions, is critical for the integrity of the BBB. We have identified de novo heterozygous missense variants in CLDN5 in fifteen unrelated patients who presented with a shared constellation of features including developmental delay, seizures (primarily infantile onset focal epilepsy), microcephaly and a recognizable pattern of pontine atrophy and brain calcifications. All variants clustered in one subregion/domain of the CLDN5 gene and the recurrent variants demonstrate genotype-phenotype correlations. We modeled both patient variants and loss of function alleles in the zebrafish to show that the variants analogous to those in patients likely result in a novel aberrant function in CLDN5. In total, human patient and zebrafish data provide parallel evidence that pathogenic sequence variants in CLDN5 cause a novel neurodevelopmental disorder involving disruption of the blood brain barrier and impaired neuronal function.
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Affiliation(s)
- Ashish R Deshwar
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, Toronto, Canada.,Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Cheryl Cytrynbaum
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, Toronto, Canada.,Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada.,Department of Clinical Genetics, University Hospitals Bristol NHS Foundation Trust, Bristol, UK.,Molecular Genetics, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Harsha Murthy
- Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Jessica Zon
- Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - David Chitayat
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, Toronto, Canada
| | - Jonathan Volpatti
- Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Ruth Newbury-Ecob
- Department of Clinical Genetics, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | - Sian Ellard
- Molecular Genetics, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Hana Lango Allen
- MRC Epidemiology Unit, Institute of Metabolic Science, University of Cambridge, Cambridge, UK
| | - Emily P Yu
- Zebrafish Genetics and Disease Models Core Facility, The Hospital for Sick Children, Toronto, Canada
| | - Ramil Noche
- Zebrafish Genetics and Disease Models Core Facility, The Hospital for Sick Children, Toronto, Canada
| | - Suzi Walker
- The Centre for Applied Genomics, Genetics, and Genome Biology, The Hospital for Sick Children, Toronto, Canada
| | - Stephen W Scherer
- Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada.,The Centre for Applied Genomics, Genetics, and Genome Biology, The Hospital for Sick Children, Toronto, Canada
| | - Sonal Mahida
- Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Boston, USA
| | - Christopher M Elitt
- Fetal-Neonatal Neurology Program, Department of Neurology, Boston Children's Hospital, Boston, USA.,F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, USA.,Department of Neurology, Harvard Medical School, Boston, USA
| | - Gaël Nicolas
- Normandie University, UNIROUEN, Inserm U1245 and Rouen University Hospital, Department of Genetics and Reference Center for Developmental Disorders, F 76000, Normandy Center for Genomic and Personalized Medicine, Rouen, France
| | - Alice Goldenberg
- Normandie University, UNIROUEN, Inserm U1245 and Rouen University Hospital, Department of Genetics and Reference Center for Developmental Disorders, F 76000, Normandy Center for Genomic and Personalized Medicine, Rouen, France
| | - Pascale Saugier-Veber
- Normandie University, UNIROUEN, Inserm U1245 and Rouen University Hospital, Department of Genetics and Reference Center for Developmental Disorders, F 76000, Normandy Center for Genomic and Personalized Medicine, Rouen, France
| | - Francois Lecoquierre
- Normandie University, UNIROUEN, Inserm U1245 and Rouen University Hospital, Department of Genetics and Reference Center for Developmental Disorders, F 76000, Normandy Center for Genomic and Personalized Medicine, Rouen, France
| | - Ivana Dabaj
- Department of Neonatology and Pediatric Intensive Care-Pediatric Neurology, Rouen University Hospital, and Inserm U1245, Normandie University, UNIROUEN, Rouen, France
| | | | - Michael Marble
- Children's Hospital of New Orleans, New Orleans, USA.,Louisiana State University Health Sciences Center, Department of Pediatrics, New Orleans, USA
| | | | - Lucy Drayson
- Pediatric Specialists of Virginia, Virginia, USA
| | - Kristin W Barañano
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, USA
| | | | | | - Pascaline Létard
- Service de Génétique, CHU de Poitiers, CS 90577 - 86021 Poitiers Cedex, France
| | - Frederic Bilan
- Service de Génétique, CHU de Poitiers, CS 90577 - 86021 Poitiers Cedex, France.,EA3808 NEUVACOD, University of Poitiers, Poitiers, France
| | - Gwenaël Le Guyader
- Service de Génétique, CHU de Poitiers, CS 90577 - 86021 Poitiers Cedex, France.,EA3808 NEUVACOD, University of Poitiers, Poitiers, France
| | - Annie Laquerrière
- Normandie Univ, UNIROUEN, INSERM U1245 and Rouen University Hospital, Department of Pathology, F76000, Normandy Centre for Genomic and Personalized Medicine, Rouen, France
| | - Keri Ramsey
- Translational Genomics Research Institute, Center for Rare Childhood Disorders, Phoenix, USA
| | | | - Lauren Brady
- Department of Pediatrics, McMaster University, Hamilton, Canada
| | | | | | - Jennifer Friedman
- Rady Children's Institute for Genomic Medicine, San Diego, USA.,Departments of Neurosciences and Pediatrics, University of California San Diego, San Diego, USA
| | - Yline Capri
- Département de Génétique, Assistance Publique des Hôpitaux de Paris (AP-HP) Hôpital Robert Debré, Paris, France
| | | | | | | | | | - Susan Blaser
- Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Canada
| | - James J Dowling
- Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada.,Division of Neurology, The Hospital for Sick Children, Toronto, Canada.,Department of Molecular Genetics, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Rosanna Weksberg
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, Toronto, Canada.,Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Canada.,Department of Molecular Genetics, Faculty of Medicine, University of Toronto, Toronto, Canada.,Institutes of Medical Sciences, University of Toronto, Toronto, Canada
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4
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Johannesen KM, Liu Y, Koko M, Gjerulfsen CE, Sonnenberg L, Schubert J, Fenger CD, Eltokhi A, Rannap M, Koch NA, Lauxmann S, Krüger J, Kegele J, Canafoglia L, Franceschetti S, Mayer T, Rebstock J, Zacher P, Ruf S, Alber M, Sterbova K, Lassuthová P, Vlckova M, Lemke JR, Platzer K, Krey I, Heine C, Wieczorek D, Kroell-Seger J, Lund C, Klein KM, Au PYB, Rho JM, Ho AW, Masnada S, Veggiotti P, Giordano L, Accorsi P, Hoei-Hansen CE, Striano P, Zara F, Verhelst H, Verhoeven JS, Braakman HMH, van der Zwaag B, Harder AVE, Brilstra E, Pendziwiat M, Lebon S, Vaccarezza M, Le NM, Christensen J, Grønborg S, Scherer SW, Howe J, Fazeli W, Howell KB, Leventer R, Stutterd C, Walsh S, Gerard M, Gerard B, Matricardi S, Bonardi CM, Sartori S, Berger A, Hoffman-Zacharska D, Mastrangelo M, Darra F, Vøllo A, Motazacker MM, Lakeman P, Nizon M, Betzler C, Altuzarra C, Caume R, Roubertie A, Gélisse P, Marini C, Guerrini R, Bilan F, Tibussek D, Koch-Hogrebe M, Perry MS, Ichikawa S, Dadali E, Sharkov A, Mishina I, Abramov M, Kanivets I, Korostelev S, Kutsev S, Wain KE, Eisenhauer N, Wagner M, Savatt JM, Müller-Schlüter K, Bassan H, Borovikov A, Nassogne MC, Destrée A, Schoonjans AS, Meuwissen M, Buzatu M, Jansen A, Scalais E, Srivastava S, Tan WH, Olson HE, Loddenkemper T, Poduri A, Helbig KL, Helbig I, Fitzgerald MP, Goldberg EM, Roser T, Borggraefe I, Brünger T, May P, Lal D, Lederer D, Rubboli G, Heyne HO, Lesca G, Hedrich UBS, Benda J, Gardella E, Lerche H, Møller RS. Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications. Brain 2022; 145:2991-3009. [PMID: 34431999 PMCID: PMC10147326 DOI: 10.1093/brain/awab321] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 06/24/2021] [Accepted: 07/22/2021] [Indexed: 11/13/2022] Open
Abstract
We report detailed functional analyses and genotype-phenotype correlations in 392 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel Nav1.6, with the aim of describing clinical phenotypes related to functional effects. Six different clinical subgroups were identified: Group 1, benign familial infantile epilepsy (n = 15, normal cognition, treatable seizures); Group 2, intermediate epilepsy (n = 33, mild intellectual disability, partially pharmaco-responsive); Group 3, developmental and epileptic encephalopathy (n = 177, severe intellectual disability, majority pharmaco-resistant); Group 4, generalized epilepsy (n = 20, mild to moderate intellectual disability, frequently with absence seizures); Group 5, unclassifiable epilepsy (n = 127); and Group 6, neurodevelopmental disorder without epilepsy (n = 20, mild to moderate intellectual disability). Those in Groups 1-3 presented with focal or multifocal seizures (median age of onset: 4 months) and focal epileptiform discharges, whereas the onset of seizures in patients with generalized epilepsy was later (median: 42 months) with generalized epileptiform discharges. We performed functional studies expressing missense variants in ND7/23 neuroblastoma cells and primary neuronal cultures using recombinant tetrodotoxin-insensitive human Nav1.6 channels and whole-cell patch-clamping. Two variants causing developmental and epileptic encephalopathy showed a strong gain-of-function (hyperpolarizing shift of steady-state activation, strongly increased neuronal firing rate) and one variant causing benign familial infantile epilepsy or intermediate epilepsy showed a mild gain-of-function (defective fast inactivation, less increased firing). In contrast, all three variants causing generalized epilepsy induced a loss-of-function (reduced current amplitudes, depolarizing shift of steady-state activation, reduced neuronal firing). Functional effects were known for 170 individuals. All 136 individuals carrying a functionally tested gain-of-function variant had either focal (n = 97, Groups 1-3) or unclassifiable (n = 39) epilepsy, whereas 34 individuals with a loss-of-function variant had either generalized (n = 14), no (n = 11) or unclassifiable (n = 6) epilepsy; only three had developmental and epileptic encephalopathy. Computational modelling in the gain-of-function group revealed a significant correlation between the severity of the electrophysiological and clinical phenotypes. Gain-of-function variant carriers responded significantly better to sodium channel blockers than to other anti-seizure medications, and the same applied for all individuals in Groups 1-3. In conclusion, our data reveal clear genotype-phenotype correlations between age at seizure onset, type of epilepsy and gain- or loss-of-function effects of SCN8A variants. Generalized epilepsy with absence seizures is the main epilepsy phenotype of loss-of-function variant carriers and the extent of the electrophysiological dysfunction of the gain-of-function variants is a main determinant of the severity of the clinical phenotype in focal epilepsies. Our pharmacological data indicate that sodium channel blockers present a treatment option in SCN8A-related focal epilepsy with onset in the first year of life.
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Affiliation(s)
- Katrine M Johannesen
- Department of Epilepsy Genetics and Personalized Treatment, The Danish Epilepsy Center, 4293 Dianalund, Denmark
- Institute for Regional Health Services, University of Southern Denmark, 5230 Odense, Denmark
| | - Yuanyuan Liu
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Mahmoud Koko
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Cathrine E Gjerulfsen
- Department of Epilepsy Genetics and Personalized Treatment, The Danish Epilepsy Center, 4293 Dianalund, Denmark
| | - Lukas Sonnenberg
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
- Institute for Neurobiology, University of Tuebingen, 72072 Tuebingen, Germany
| | - Julian Schubert
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Christina D Fenger
- Department of Epilepsy Genetics and Personalized Treatment, The Danish Epilepsy Center, 4293 Dianalund, Denmark
| | - Ahmed Eltokhi
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Maert Rannap
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Nils A Koch
- Institute for Neurobiology, University of Tuebingen, 72072 Tuebingen, Germany
| | - Stephan Lauxmann
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
- Institute for Neurobiology, University of Tuebingen, 72072 Tuebingen, Germany
| | - Johanna Krüger
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Josua Kegele
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Laura Canafoglia
- Department of Diagnostics and Technology, Fondazione IRCCS Istituto Neurologio Carlo Besta, 20125 Milan, Italy
| | - Silvana Franceschetti
- Department of Diagnostics and Technology, Fondazione IRCCS Istituto Neurologio Carlo Besta, 20125 Milan, Italy
| | - Thomas Mayer
- Epilepsy Center Kleinwachau, 01454 Dresden-Radeberg, Germany
| | | | - Pia Zacher
- Epilepsy Center Kleinwachau, 01454 Dresden-Radeberg, Germany
| | - Susanne Ruf
- Department of Pediatric Neurology and Developmental Medicine, University Children’s Hospital, 72072 Tuebingen, Germany
| | - Michael Alber
- Department of Pediatric Neurology and Developmental Medicine, University Children’s Hospital, 72072 Tuebingen, Germany
| | - Katalin Sterbova
- Department of Child Neurology, 2nd Faculty of Medicine, Charles University and University Hospital Motol, 10000 Prague, Czech Republic
| | - Petra Lassuthová
- Department of Child Neurology, 2nd Faculty of Medicine, Charles University and University Hospital Motol, 10000 Prague, Czech Republic
| | - Marketa Vlckova
- Department of Child Neurology, 2nd Faculty of Medicine, Charles University and University Hospital Motol, 10000 Prague, Czech Republic
| | - Johannes R Lemke
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, 4275 Leipzig, Germany
| | - Konrad Platzer
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, 4275 Leipzig, Germany
| | - Ilona Krey
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, 4275 Leipzig, Germany
| | - Constanze Heine
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, 4275 Leipzig, Germany
| | - Dagmar Wieczorek
- Institute of Human Genetics, University Clinic, Heinrich-Heine-University, 40210 Düsseldorf, Germany
| | - Judith Kroell-Seger
- Children’s Department, Swiss Epilepsy Centre, Clinic Lengg, 8001 Zurich, Switzerland
| | - Caroline Lund
- National Centre for Rare Epilepsy-Related Disorders, Oslo University Hospital, 0001 Oslo, Norway
| | - Karl Martin Klein
- Departments of Clinical Neurosciences, Medical Genetics and Community Health Sciences, Hotchkiss Brain Institute and Alberta Children’s Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2P 0A1, Canada
| | - P Y Billie Au
- Department of Medical Genetics, Alberta Children’s Hospital Research Institute, University of Calgary, AB T6G 2T4, Canada
| | - Jong M Rho
- Section of Pediatric Neurology, Alberta Children’s Hospital, Cumming School of Medicine, University of Calgary, Calgary, AB T2P 0A1, Canada
| | - Alice W Ho
- Section of Pediatric Neurology, Alberta Children’s Hospital, Cumming School of Medicine, University of Calgary, Calgary, AB T2P 0A1, Canada
| | - Silvia Masnada
- Department of Child Neurology, V. Buzzi Children’s Hospital, 20125 Milan, Italy
| | - Pierangelo Veggiotti
- Department of Child Neurology, V. Buzzi Children’s Hospital, 20125 Milan, Italy
- ‘L. Sacco’ Department of Biomedical and Clinical Sciences, University of Milan, 20157 Milan, Italy
| | - Lucio Giordano
- Child Neuropsychiatric Unit, Civilian Hospital, 25100 Brescia, Italy
| | - Patrizia Accorsi
- Child Neuropsychiatric Unit, Civilian Hospital, 25100 Brescia, Italy
| | - Christina E Hoei-Hansen
- Department of Pediatrics, Copenhagen University Hospital Rigshospitalet, 2200 Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Pasquale Striano
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, 16121 Genova, Italy
- IRCCS ‘G. Gaslini’ Institute, 16121 Genoa, Italy
| | | | - Helene Verhelst
- Department of Pediatrics, Division of Pediatric Neurology, Gent University Hospital, 9042 Gent, Belgium
| | - Judith S Verhoeven
- Academic Center for Epileptology, Kempenhaeghe/Maastricht University Medical Center, 5591 Heeze, The Netherlands
| | - Hilde M H Braakman
- Department of Pediatric Neurology, Amalia Children’s Hospital, Radboud University Medical Center, 6525 Nijmegen, The Netherlands
| | - Bert van der Zwaag
- Department of Genetics, University Medical Center Utrecht, Utrecht University, 3553 Utrecht, The Netherlands
| | - Aster V E Harder
- Department of Genetics, University Medical Center Utrecht, Utrecht University, 3553 Utrecht, The Netherlands
| | - Eva Brilstra
- Department of Genetics, University Medical Center Utrecht, Utrecht University, 3553 Utrecht, The Netherlands
| | - Manuela Pendziwiat
- Department of Neuropediatrics, Universitätsklinikum Schleswig Holstein Campus Kiel, 24106 Kiel, Germany
| | - Sebastian Lebon
- Pediatric Neurology and Neurorehabilitation Unit, Woman Mother Child Department, Lausanne University Hospital (CHUV), 1000 Lausanne, Switzerland
- University of Lausanne, 1000 Lausanne, Switzerland
| | - Maria Vaccarezza
- Department of Pediatric Neurology, Hospital Italiano de Buenos Aires, C1428 Buenos Aires, Argentina
| | - Ngoc Minh Le
- Center for Pediatric Neurology, Cleveland Clinic, Cleveland, OH 44102, USA
| | - Jakob Christensen
- Department of Neurology, Aarhus University Hospital, 8000 Aarhus, Denmark
| | - Sabine Grønborg
- Center for Rare Diseases, Department of Pediatrics and Department of Clinical Genetics, Copenhagen University Hospital Rigshospitalet, 2200 Copenhagen, Denmark
| | - Stephen W Scherer
- McLaughlin Centre and Department of Molecular Genetics, University of Toronto, Toronto, ON 66777, Canada
- The Centre for Applied Genomics and Department of Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON 66777, Canada
| | - Jennifer Howe
- Department of Neuropediatrics, University Hospital Bonn, 53229 Bonn, Germany
| | - Walid Fazeli
- Institute for Molecular and Behavioral Neuroscience, University of Cologne, 50667 Cologne, Germany
- Neurology Department, The Royal Children’s Hospital Melbourne, 3002 Melbourne, Australia
| | - Katherine B Howell
- Neurology Department, The Royal Children’s Hospital Melbourne, 3002 Melbourne, Australia
- Murdoch Children’s Research Institute, 3052 Parkville, Australia
- Department of Pediatrics, University of Melbourne, Royal Children’s Hospital, 3052 Parkville, Australia
| | - Richard Leventer
- Neurology Department, The Royal Children’s Hospital Melbourne, 3002 Melbourne, Australia
- Murdoch Children’s Research Institute, 3052 Parkville, Australia
- Department of Pediatrics, University of Melbourne, Royal Children’s Hospital, 3052 Parkville, Australia
| | - Chloe Stutterd
- Murdoch Children’s Research Institute, 3052 Parkville, Australia
- Department of Pediatrics, University of Melbourne, Royal Children’s Hospital, 3052 Parkville, Australia
| | - Sonja Walsh
- Department of Neuropediatrics, Children’s Hospital, University Hospital Carl Gustav Carus, Technical University, 1099 Dresden, Germany
| | - Marion Gerard
- Genetics Department, CHU Côte de Nacre, 14118 Caen, France
| | | | - Sara Matricardi
- Child Neurology and Psychiatry Unit, Children’s Hospital G. Salesi, 60121 Ancona, Italy
| | - Claudia M Bonardi
- Department of Woman’s and Child’s Health, Padova University Hospital, 35100 Padova, Italy
| | - Stefano Sartori
- Child Neurology and Clinical Neurophysiology Unit, Padova University Hospital, 35100 Padova, Italy
| | - Andrea Berger
- Department of Neuropediatrics, Klinikum Weiden, Kliniken Nordoberpfalz AG, 92637 Weiden, Germany
| | | | - Massimo Mastrangelo
- Pediatric Neurology Unit, Vittore Buzzi Hospital, ASST Fatebenefratelli Sacco, 20100 Milan, Italy
| | - Francesca Darra
- Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37121 Verona, Italy
| | - Arve Vøllo
- Department of Pediatrics, Oestfold Hospital, 1712 Graalum, Norway
| | - M Mahdi Motazacker
- Laboratory of Genome Diagnostics, Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, 1019 Amsterdam, Netherlands
| | - Phillis Lakeman
- Department of Clinical Genetics, Amsterdam Reproduction and Development Research Institute, Amsterdam UMC, University of Amsterdam, 1019 Amsterdam, Netherlands
| | - Mathilde Nizon
- Service de Génétique Médicale, CHU Nantes, 44093 Nantes, France
| | - Cornelia Betzler
- Clinic for Neuropediatrics and Neurorehabilitation, Epilepsy Center for Children and Adolescents, Schön Klinik, 83569 Vogtareuth, Germany
- Research Institute ‘Rehabilitation, Transition, Palliation’, PMU Salzburg, 5020 Salzburg, Austria
| | - Cecilia Altuzarra
- Department of Pediatrics, St. Jacques Hospital, 25000 Besançon, France
| | - Roseline Caume
- Clinique de Génétique Guy Fontaine, CHU Lille, 59000, Lille, France
| | - Agathe Roubertie
- Département de Neuropédiatrie, INSERM, CHU Montpellier, 34000 Montpellier, France
| | - Philippe Gélisse
- Département de Neuropédiatrie, INSERM, CHU Montpellier, 34000 Montpellier, France
| | - Carla Marini
- Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children’s Hospital, University of Florence, 50131 Florence, Italy
| | | | - Frederic Bilan
- Service de Génétique, Centre Hospitalier Universitaire de Poitiers, 86021 Poitiers, France
| | - Daniel Tibussek
- Child Neurology, Center for Pediatric and Teenage Health Care, 53757 Sankt Augustin, Germany
| | | | - M Scott Perry
- Justin Neurosciences Center, Cook Children’s Medical Center, Fort Worth, TX 76101, USA
| | - Shoji Ichikawa
- Department of Clinical Diagnostics, Ambry Genetics, Aliso Viejo, CA 92637, USA
| | - Elena Dadali
- Research Centre for Medical Genetics, 115522 Moscow, Russia
- Veltischev Research and Clinical Institute for Pediatrics, Pirogov Russian National Research Medical University, 125412 Moscow, Russia
| | - Artem Sharkov
- Veltischev Research and Clinical Institute for Pediatrics, Pirogov Russian National Research Medical University, 125412 Moscow, Russia
- Genomed Ltd., 100000 Moscow, Russia
| | - Irina Mishina
- Research Centre for Medical Genetics, 115522 Moscow, Russia
| | - Mikhail Abramov
- Veltischev Research and Clinical Institute for Pediatrics, Pirogov Russian National Research Medical University, 125412 Moscow, Russia
| | - Ilya Kanivets
- Svt. Luka’s Institute of Child Neurology & Epilepsy, 100000 Moscow, Russia
- Russian Medical Academy of Continuous Professional Education, 100000 Moscow, Russia
| | - Sergey Korostelev
- Svt. Luka’s Institute of Child Neurology & Epilepsy, 100000 Moscow, Russia
- I.M. Sechenov First Moscow State Medical University, 100000 Moscow, Russia
| | - Sergey Kutsev
- Research Centre for Medical Genetics, 115522 Moscow, Russia
| | - Karen E Wain
- Geisinger Autism & Developmental Medicine Institute, Lewisburg, PA 17837, USA
| | - Nancy Eisenhauer
- Geisinger Autism & Developmental Medicine Institute, Lewisburg, PA 17837, USA
| | - Monisa Wagner
- Geisinger Autism & Developmental Medicine Institute, Lewisburg, PA 17837, USA
| | - Juliann M Savatt
- Geisinger Autism & Developmental Medicine Institute, Lewisburg, PA 17837, USA
| | - Karen Müller-Schlüter
- Epilepsy Center for Children, University Hospital Neuruppin, Brandenburg Medical School, 16816 Neuruppin, Germany
| | - Haim Bassan
- Pediatric Neurology & Development Center, Shamir Medical Center (Assaf Harofe), Be'er Ya'akov, Israel
- Sackler Faculty of Medicine, Tel Aviv University, 5296001 Tel Aviv, Israel
| | | | - Marie Cecile Nassogne
- Pediatric Neurology Unit, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, 1000 Brussels, Belgium
| | - Anne Destrée
- Institute for Pathology and Genetics, 6040 Gosselies, Belgium
| | - An Sofie Schoonjans
- Department of Pediatrics and Pediatric Neurology, Antwerp University Hospital, University of Antwerp, 2650 Edegem, Belgium
| | - Marije Meuwissen
- Pediatric Neurology, Marie Curie Hospital—CHU Charleroi, 6032 Charleroi, Belgium
| | - Marga Buzatu
- Pediatric Neurology, Marie Curie Hospital—CHU Charleroi, 6032 Charleroi, Belgium
| | - Anna Jansen
- Pediatric Neurology Unit, Department of Pediatrics, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Emmanuel Scalais
- Pediatric Neurology Unit, Department of Pediatrics, Centre Hospitalier de Luxembourg, 1313 Luxembourg, Luxembourg
| | - Siddharth Srivastava
- Department of Neurology, Boston Children’s Hospital and Harvard Medical School, Boston, MA 02108, USA
| | - Wen Hann Tan
- Department of Genetics, Boston Children’s Hospital, Boston, MA 02108, USA
| | - Heather E Olson
- Department of Neurology, Boston Children’s Hospital and Harvard Medical School, Boston, MA 02108, USA
- Epilepsy Genetics Program, Boston Children’s Hospital, Boston, MA 02108, USA
| | - Tobias Loddenkemper
- Department of Neurology, Boston Children’s Hospital and Harvard Medical School, Boston, MA 02108, USA
| | - Annapurna Poduri
- Department of Neurology, Boston Children’s Hospital and Harvard Medical School, Boston, MA 02108, USA
- Epilepsy Genetics Program, Boston Children’s Hospital, Boston, MA 02108, USA
| | - Katherine L Helbig
- Division of Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- The Epilepsy Neurogenetics Initiative (ENGIN), Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Ingo Helbig
- Division of Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- The Epilepsy Neurogenetics Initiative (ENGIN), Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Department of Biomedical and Health Informatics (DBHi), Children’s Hospital of Philadelphia, Philadelphia, PA 19104 USA
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
- Institute of Clinical Molecular Biology, Kiel University, 24105 Kiel, Germany
- Department of Neuropediatrics, Kiel University, 24105 Kiel, Germany
| | - Mark P Fitzgerald
- Division of Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- The Epilepsy Neurogenetics Initiative (ENGIN), Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Department of Biomedical and Health Informatics (DBHi), Children’s Hospital of Philadelphia, Philadelphia, PA 19104 USA
- Institute of Clinical Molecular Biology, Kiel University, 24105 Kiel, Germany
| | - Ethan M Goldberg
- Division of Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- The Epilepsy Neurogenetics Initiative (ENGIN), Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Timo Roser
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. von Haunersches Children’s Hospital, Ludwig-Maximilian-University of Munich, 80331 Munich, Germany
| | - Ingo Borggraefe
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. von Haunersches Children’s Hospital, Ludwig-Maximilian-University of Munich, 80331 Munich, Germany
- Comprehensive Epilepsy Center, Ludwig-Maximilian- University of Munich, 80331 Munich, Germany
| | - Tobias Brünger
- Luxembourg Centre for Systems Biomedicine (LCSB), University Luxembourg, L-4243 Esch-sur-Alzette, Luxembourg
| | - Patrick May
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44102, USA
| | - Dennis Lal
- Luxembourg Centre for Systems Biomedicine (LCSB), University Luxembourg, L-4243 Esch-sur-Alzette, Luxembourg
- Epilepsy Center, Neurological Institute, Cleveland Clinic, Cleveland, OH 44102, USA
- Stanley Center for Psychiatric Research, Broad Institute of Harvard and M.I.T., Cambridge, MA 02138, USA
- Cologne Center for Genomics (CCG), University of Cologne, 50667 Cologne, Germany
| | - Damien Lederer
- Institute for Pathology and Genetics, 6040 Gosselies, Belgium
| | - Guido Rubboli
- Department of Epilepsy Genetics and Personalized Treatment, The Danish Epilepsy Center, 4293 Dianalund, Denmark
- University of Copenhagen, 2200 Copenhagen, Denmark
| | - Henrike O Heyne
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, 4275 Leipzig, Germany
- Finnish Institute for Molecular Medicine (FIMM), University of Helsinki, 320 Helsinki, Finland
- Program for Medical and Population Genetics/Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02138, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02108, USA
| | - Gaetan Lesca
- Department of Medical Genetics, Groupement Hospitalier Est and ERN EpiCARE, University Hospitals of Lyon (HCL), 69001 Lyon, France
- Institut Neuromyogène, CNRS UMR 5310 - INSERM U1217, Université de Lyon, Université Claude Bernard Lyon 1, 69001 Lyon, France
| | - Ulrike B S Hedrich
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Jan Benda
- Institute for Neurobiology, University of Tuebingen, 72072 Tuebingen, Germany
| | - Elena Gardella
- Department of Epilepsy Genetics and Personalized Treatment, The Danish Epilepsy Center, 4293 Dianalund, Denmark
- Institute for Regional Health Services, University of Southern Denmark, 5230 Odense, Denmark
| | - Holger Lerche
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tuebingen, 72072 Tuebingen, Germany
| | - Rikke S Møller
- Department of Epilepsy Genetics and Personalized Treatment, The Danish Epilepsy Center, 4293 Dianalund, Denmark
- Institute for Regional Health Services, University of Southern Denmark, 5230 Odense, Denmark
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5
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Platzer K, Sticht H, Bupp C, Ganapathi M, Pereira EM, Le Guyader G, Bilan F, Henderson LB, Lemke JR, Taschenberger H, Brose N, Jamra RA, Wojcik SM. De novo missense variants in
SLC32A1
cause a developmental and epileptic encephalopathy due to impaired
GABAergic
neurotransmission. Ann Neurol 2022; 92:958-973. [DOI: 10.1002/ana.26485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Konrad Platzer
- Institute of Human Genetics University of Leipzig Medical Center Leipzig Germany
| | - Heinrich Sticht
- Institute of Biochemistry, Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Erlangen Germany
| | - Caleb Bupp
- Spectrum Health Medical Genetics Grand Rapids MI USA
| | - Mythily Ganapathi
- Department of Pathology and Cell Biology Columbia University Medical Center New York NY USA
| | - Elaine M. Pereira
- Department of Pediatrics Columbia University Irving Medical Center New York NY USA
| | - Gwenaël Le Guyader
- Department of Genetics Poitiers University Hospital Center Poitiers Cedex France
| | - Frederic Bilan
- Department of Genetics Poitiers University Hospital Center Poitiers Cedex France
- Laboratoire de Neurosciences Expérimentales et Cliniques (LNEC) INSERM U1084 University of Poitiers Poitiers France
| | | | - Johannes R. Lemke
- Institute of Human Genetics University of Leipzig Medical Center Leipzig Germany
- Center for Rare Diseases University of Leipzig Medical Center Leipzig Germany
| | - Holger Taschenberger
- Department of Molecular Neurobiology Max Planck Institute for Multidisciplinary Sciences City Campus, Göttingen Germany
| | - Nils Brose
- Department of Molecular Neurobiology Max Planck Institute for Multidisciplinary Sciences City Campus, Göttingen Germany
| | - Rami Abou Jamra
- Institute of Human Genetics University of Leipzig Medical Center Leipzig Germany
| | - Sonja M. Wojcik
- Department of Molecular Neurobiology Max Planck Institute for Multidisciplinary Sciences City Campus, Göttingen Germany
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6
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Mannucci I, Dang NDP, Huber H, Murry JB, Abramson J, Althoff T, Banka S, Baynam G, Bearden D, Beleza-Meireles A, Benke PJ, Berland S, Bierhals T, Bilan F, Bindoff LA, Braathen GJ, Busk ØL, Chenbhanich J, Denecke J, Escobar LF, Estes C, Fleischer J, Groepper D, Haaxma CA, Hempel M, Holler-Managan Y, Houge G, Jackson A, Kellogg L, Keren B, Kiraly-Borri C, Kraus C, Kubisch C, Le Guyader G, Ljungblad UW, Brenman LM, Martinez-Agosto JA, Might M, Miller DT, Minks KQ, Moghaddam B, Nava C, Nelson SF, Parant JM, Prescott T, Rajabi F, Randrianaivo H, Reiter SF, Schuurs-Hoeijmakers J, Shieh PB, Slavotinek A, Smithson S, Stegmann APA, Tomczak K, Tveten K, Wang J, Whitlock JH, Zweier C, McWalter K, Juusola J, Quintero-Rivera F, Fischer U, Yeo NC, Kreienkamp HJ, Lessel D. Genotype-phenotype correlations and novel molecular insights into the DHX30-associated neurodevelopmental disorders. Genome Med 2021; 13:90. [PMID: 34020708 PMCID: PMC8140440 DOI: 10.1186/s13073-021-00900-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 04/28/2021] [Indexed: 12/27/2022] Open
Abstract
Background We aimed to define the clinical and variant spectrum and to provide novel molecular insights into the DHX30-associated neurodevelopmental disorder. Methods Clinical and genetic data from affected individuals were collected through Facebook-based family support group, GeneMatcher, and our network of collaborators. We investigated the impact of novel missense variants with respect to ATPase and helicase activity, stress granule (SG) formation, global translation, and their effect on embryonic development in zebrafish. SG formation was additionally analyzed in CRISPR/Cas9-mediated DHX30-deficient HEK293T and zebrafish models, along with in vivo behavioral assays. Results We identified 25 previously unreported individuals, ten of whom carry novel variants, two of which are recurrent, and provide evidence of gonadal mosaicism in one family. All 19 individuals harboring heterozygous missense variants within helicase core motifs (HCMs) have global developmental delay, intellectual disability, severe speech impairment, and gait abnormalities. These variants impair the ATPase and helicase activity of DHX30, trigger SG formation, interfere with global translation, and cause developmental defects in a zebrafish model. Notably, 4 individuals harboring heterozygous variants resulting either in haploinsufficiency or truncated proteins presented with a milder clinical course, similar to an individual harboring a de novo mosaic HCM missense variant. Functionally, we established DHX30 as an ATP-dependent RNA helicase and as an evolutionary conserved factor in SG assembly. Based on the clinical course, the variant location, and type we establish two distinct clinical subtypes. DHX30 loss-of-function variants cause a milder phenotype whereas a severe phenotype is caused by HCM missense variants that, in addition to the loss of ATPase and helicase activity, lead to a detrimental gain-of-function with respect to SG formation. Behavioral characterization of dhx30-deficient zebrafish revealed altered sleep-wake activity and social interaction, partially resembling the human phenotype. Conclusions Our study highlights the usefulness of social media to define novel Mendelian disorders and exemplifies how functional analyses accompanied by clinical and genetic findings can define clinically distinct subtypes for ultra-rare disorders. Such approaches require close interdisciplinary collaboration between families/legal representatives of the affected individuals, clinicians, molecular genetics diagnostic laboratories, and research laboratories. Supplementary Information The online version contains supplementary material available at 10.1186/s13073-021-00900-3.
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Affiliation(s)
- Ilaria Mannucci
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Nghi D P Dang
- Department of Pharmacology and Toxicology, University of Alabama, Birmingham, USA
| | - Hannes Huber
- Department of Biochemistry, Theodor Boveri Institute, Biocenter of the University of Würzburg, 97070, Würzburg, Germany
| | - Jaclyn B Murry
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.,UCLA Clinical Genomics Center, University of California Los Angeles, Los Angeles, CA, USA
| | - Jeff Abramson
- Department of Physiology, University of California Los Angeles, Los Angeles, CA, USA
| | - Thorsten Althoff
- Department of Physiology, University of California Los Angeles, Los Angeles, CA, USA
| | - Siddharth Banka
- Manchester Centre for Genomic Medicine, St Mary's Hospital, Manchester University NHS Foundation Trust, Health Innovation Manchester, Manchester, UK.,Division of Evolution & Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Gareth Baynam
- Faculty of Medicine and Health Sciences, University of Western Australia, Perth, WA, Australia.,Western Australian Register of Developmental Anomalies, King Edward Memorial Hospital, Perth, Australia.,Telethon Kids Institute, Perth, Australia
| | - David Bearden
- Division of Child Neurology, Department of Neurology, University of Rochester School of Medicine, Rochester, NY, USA
| | - Ana Beleza-Meireles
- Clinical Genetics Department, University Hospitals Bristol and Weston, Bristol, UK
| | - Paul J Benke
- Joe DiMaggio Children's Hospital, Hollywood, FL, USA
| | - Siren Berland
- Department of Medical Genetics, Haukeland University Hospital, 5021, Bergen, Norway
| | - Tatjana Bierhals
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Frederic Bilan
- Department of Medical Genetics, Centre Hospitalier Universitaire de Poitiers, Poitiers, France.,Laboratoire de Neurosciences Cliniques et Expérimentales-INSERM U1084, Université de Poitiers, Poitiers, France
| | - Laurence A Bindoff
- Department of Clinical Medicine (K1), University of Bergen, Bergen, Norway.,Department of Neurology, Haukeland University Hospital, Bergen, Norway
| | | | - Øyvind L Busk
- Department of Medical Genetics, Telemark Hospital Trust, Skien, Norway
| | - Jirat Chenbhanich
- Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Jonas Denecke
- Department of Pediatrics, University Medical Center Eppendorf, 20246, Hamburg, Germany
| | - Luis F Escobar
- Peyton Manning Children's Hospital, Ascension Health, Indianapolis, IN, USA
| | - Caroline Estes
- Peyton Manning Children's Hospital, Ascension Health, Indianapolis, IN, USA
| | - Julie Fleischer
- Department of Pediatrics, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Daniel Groepper
- Department of Pediatrics, Southern Illinois University School of Medicine, Springfield, IL, 62702, USA
| | - Charlotte A Haaxma
- Department of Pediatric Neurology, Amalia Children's Hospital and Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Maja Hempel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Yolanda Holler-Managan
- Division of Neurology, Department of Pediatrics, Ann and Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Gunnar Houge
- Department of Medical Genetics, Haukeland University Hospital, 5021, Bergen, Norway
| | - Adam Jackson
- Manchester Centre for Genomic Medicine, St Mary's Hospital, Manchester University NHS Foundation Trust, Health Innovation Manchester, Manchester, UK.,Division of Evolution & Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | | | - Boris Keren
- Département de Génétique, Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | | | - Cornelia Kraus
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Christian Kubisch
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Gwenael Le Guyader
- Department of Medical Genetics, Centre Hospitalier Universitaire de Poitiers, Poitiers, France.,Laboratoire de Neurosciences Cliniques et Expérimentales-INSERM U1084, Université de Poitiers, Poitiers, France
| | - Ulf W Ljungblad
- Department of Pediatrics, Vestfold Hospital, 3116, Tønsberg, Norway
| | | | - Julian A Martinez-Agosto
- UCLA Clinical Genomics Center, University of California Los Angeles, Los Angeles, CA, USA.,Semel Institute of Neuroscience and Human Behavior, University of California Los Angeles, Los Angeles, CA, USA.,Department of Pediatrics, Division of Medical Genetics at David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.,Department of Human Genetics at David Geffen School of Medicine University of California Los Angeles, Los Angeles, CA, USA
| | - Matthew Might
- Department of Medicine, Hugh Kaul Precision Medicine Institute, University of Alabama at Birmingham, 510 20th St S, Birmingham, AL, 35210, USA
| | - David T Miller
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Kelly Q Minks
- Division of Child Neurology, Department of Neurology, University of Rochester School of Medicine, Rochester, NY, USA
| | | | - Caroline Nava
- Département de Génétique, Hôpital La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Stanley F Nelson
- UCLA Clinical Genomics Center, University of California Los Angeles, Los Angeles, CA, USA.,Department of Human Genetics at David Geffen School of Medicine University of California Los Angeles, Los Angeles, CA, USA.,Center for Duchenne Muscular Dystrophy, University of California Los Angeles, Los Angeles, CA, USA
| | - John M Parant
- Department of Pharmacology and Toxicology, University of Alabama, Birmingham, USA
| | - Trine Prescott
- Department of Medical Genetics, Telemark Hospital Trust, Skien, Norway
| | - Farrah Rajabi
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Hanitra Randrianaivo
- UF de Génétique Médicale, GHSR, CHU de La Réunion, Saint Pierre, La Réunion, France
| | - Simone F Reiter
- Department of Medical Genetics, Haukeland University Hospital, 5021, Bergen, Norway
| | | | - Perry B Shieh
- Department of Neurology at David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Anne Slavotinek
- Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Sarah Smithson
- Clinical Genetics Department, University Hospitals Bristol and Weston, Bristol, UK
| | - Alexander P A Stegmann
- Department of Human Genetics, Radboud University Medical Center, 6500 HB, Nijmegen, the Netherlands.,Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Kinga Tomczak
- Department of Neurology, Boston Children's Hospital, Boston, MA, USA
| | - Kristian Tveten
- Department of Medical Genetics, Telemark Hospital Trust, Skien, Norway
| | - Jun Wang
- Department of Pharmacology and Toxicology, University of Alabama, Birmingham, USA
| | - Jordan H Whitlock
- Department of Medicine, Hugh Kaul Precision Medicine Institute, University of Alabama at Birmingham, 510 20th St S, Birmingham, AL, 35210, USA
| | - Christiane Zweier
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany.,Department of Human Genetics, Inselspital, Bern University Hospital, University of Bern, 3010, Bern, Switzerland
| | | | | | - Fabiola Quintero-Rivera
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.,UCLA Clinical Genomics Center, University of California Los Angeles, Los Angeles, CA, USA.,Department of Pathology and Laboratory Medicine, School of Medicine, University of California Irvine, Irvine, CA, USA
| | - Utz Fischer
- Department of Biochemistry, Theodor Boveri Institute, Biocenter of the University of Würzburg, 97070, Würzburg, Germany
| | - Nan Cher Yeo
- Department of Pharmacology and Toxicology, University of Alabama, Birmingham, USA.
| | - Hans-Jürgen Kreienkamp
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.
| | - Davor Lessel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.
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7
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Niclass T, Le Guyader G, Beneteau C, Joubert M, Pizzuti A, Giuffrida MG, Bernardini L, Gilbert-Dussardier B, Bilan F, Egloff M. 12q21 deletion syndrome: Narrowing the critical region down to 1.6 Mb including SYT1 and PPP1R12A. Am J Med Genet A 2020; 182:2133-2138. [PMID: 32633079 DOI: 10.1002/ajmg.a.61734] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/04/2020] [Accepted: 05/21/2020] [Indexed: 11/12/2022]
Abstract
Deletions in the 12q21 region are rare and non-recurrent CNVs. To date, only 11 patients with deletions in this region have been reported in the literature. These patients most often presented with syndromic intellectual deficiency, ventriculomegaly or hydrocephalus, ectodermal abnormalities, growth retardation and renal and cardiac malformations, suggesting a recognizable microdeletion syndrome. We report three new patients with overlapping deletions of the 12q21 region, including the smallest deletion reported to date and the first case characterized by array CGH during pregnancy. We describe specific clinical findings and shared facial features as developmental delay, ectodermal abnormalities, ventriculomegaly or hydrocephalus, axial hypotonia or spastic diplegia, growth retardation, heart defect, hydronephrosis, ureteral reflux or horseshoe kidney, large thorax or pectus excavatum, syndactyly of 2-3 toes, pterygium coli or excess nuchal skin, large anterior fontanel, low set ears, prominent forehead, short-upturned nose with nostril hypoplasia, microretrognathia and hypertelorism. These new patients and a comprehensive review of the literature allow us to define a minimum critical region spanning 1.6 Mb in 12q21. By screening the critical region using prediction tools, we identified two candidate genes: SYT1and PPP1R12A.
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Affiliation(s)
- Tanguy Niclass
- Department of Medical Genetics, Centre Hospitalier Universitaire de Poitiers, Poitiers, France
| | - Gwenael Le Guyader
- Department of Medical Genetics, Centre Hospitalier Universitaire de Poitiers, Poitiers, France.,EA 3808 NEUVACOD, Université de Poitiers, Poitiers, France
| | - Claire Beneteau
- Department of Medical Genetics, Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - Madeleine Joubert
- Department of Anatomic and Fetal Pathology, Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - Antonio Pizzuti
- Department of Medical Genetics, Policlinico di Roma, Rome, Italy
| | - Maria Grazia Giuffrida
- Fondazione IRCCS Casa Sollievo della Sofferenza, Cytogenetics Unit, San Giovanni Rotondo, FG, Italy
| | - Laura Bernardini
- Fondazione IRCCS Casa Sollievo della Sofferenza, Cytogenetics Unit, San Giovanni Rotondo, FG, Italy
| | - Brigitte Gilbert-Dussardier
- Department of Medical Genetics, Centre Hospitalier Universitaire de Poitiers, Poitiers, France.,EA 3808 NEUVACOD, Université de Poitiers, Poitiers, France
| | - Frederic Bilan
- Department of Medical Genetics, Centre Hospitalier Universitaire de Poitiers, Poitiers, France.,EA 3808 NEUVACOD, Université de Poitiers, Poitiers, France
| | - Matthieu Egloff
- Department of Medical Genetics, Centre Hospitalier Universitaire de Poitiers, Poitiers, France.,Laboratoire de Neurosciences Experimentales et Cliniques, INSERM, Poitiers, France
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8
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Tolchin D, Yeager JP, Prasad P, Dorrani N, Russi AS, Martinez-Agosto JA, Haseeb A, Angelozzi M, Santen G, Ruivenkamp C, Mercimek-Andrews S, Depienne C, Kuechler A, Mikat B, Ludecke HJ, Bilan F, Le Guyader G, Gilbert-Dussardier B, Keren B, Heide S, Haye D, Van Esch H, Keldermans L, Ortiz D, Lancaster E, Krantz ID, Krock BL, Pechter KB, Arkader A, Medne L, DeChene ET, Calpena E, Melistaccio G, Wilkie AO, Suri M, Foulds N, Begtrup A, Henderson LB, Forster C, Reed P, McDonald MT, McConkie-Rosell A, Thevenon J, Le Tanno P, Coutton C, Tsai AC, Stewart S, Maver A, Gorazd R, Pichon O, Nizon M, Cogné B, Isidor B, Martin-Coignard D, Stoeva R, Lefebvre V, Le Caignec C, Ambrose J, Bleda M, Boardman-Pretty F, Boissiere J, Boustred C, Caulfield M, Chan G, Craig C, Daugherty L, de Burca A, Devereau A, Elgar G, Foulger R, Fowler T, Furió-Tarí P, Hackett J, Halai D, Holman J, Hubbard T, Kasperaviciute D, Kayikci M, Lahnstein L, Lawson K, Leigh S, Leong I, Lopez F, Maleady-Crowe F, Mason J, McDonagh E, Moutsianas L, Mueller M, Need A, Odhams C, Patch C, Perez-Gil D, Polychronopoulos D, Pullinger J, Rahim T, Rendon A, Rogers T, Ryten M, Savage K, Scott R, Siddiq A, Sieghart A, Smedley D, Smith K, Sosinsky A, Spooner W, Stevens H, Stuckey A, Thomas E, Thompson S, Tregidgo C, Tucci A, Walsh E, Watters S, Welland M, Williams E, Witkowska K, Wood S, Zarowiecki M. De Novo SOX6 Variants Cause a Neurodevelopmental Syndrome Associated with ADHD, Craniosynostosis, and Osteochondromas. Am J Hum Genet 2020; 106:830-845. [PMID: 32442410 DOI: 10.1016/j.ajhg.2020.04.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/24/2020] [Indexed: 12/21/2022] Open
Abstract
SOX6 belongs to a family of 20 SRY-related HMG-box-containing (SOX) genes that encode transcription factors controlling cell fate and differentiation in many developmental and adult processes. For SOX6, these processes include, but are not limited to, neurogenesis and skeletogenesis. Variants in half of the SOX genes have been shown to cause severe developmental and adult syndromes, referred to as SOXopathies. We here provide evidence that SOX6 variants also cause a SOXopathy. Using clinical and genetic data, we identify 19 individuals harboring various types of SOX6 alterations and exhibiting developmental delay and/or intellectual disability; the individuals are from 17 unrelated families. Additional, inconstant features include attention-deficit/hyperactivity disorder (ADHD), autism, mild facial dysmorphism, craniosynostosis, and multiple osteochondromas. All variants are heterozygous. Fourteen are de novo, one is inherited from a mosaic father, and four offspring from two families have a paternally inherited variant. Intragenic microdeletions, balanced structural rearrangements, frameshifts, and nonsense variants are predicted to inactivate the SOX6 variant allele. Four missense variants occur in residues and protein regions highly conserved evolutionarily. These variants are not detected in the gnomAD control cohort, and the amino acid substitutions are predicted to be damaging. Two of these variants are located in the HMG domain and abolish SOX6 transcriptional activity in vitro. No clear genotype-phenotype correlations are found. Taken together, these findings concur that SOX6 haploinsufficiency leads to a neurodevelopmental SOXopathy that often includes ADHD and abnormal skeletal and other features.
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9
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Mulhern MS, Stumpel C, Stong N, Brunner HG, Bier L, Lippa N, Riviello J, Rouhl RPW, Kempers M, Pfundt R, Stegmann APA, Kukolich MK, Telegrafi A, Lehman A, Lopez-Rangel E, Houcinat N, Barth M, den Hollander N, Hoffer MJV, Weckhuysen S, Roovers J, Djemie T, Barca D, Ceulemans B, Craiu D, Lemke JR, Korff C, Mefford HC, Meyers CT, Siegler Z, Hiatt SM, Cooper GM, Bebin EM, Snijders Blok L, Veenstra-Knol HE, Baugh EH, Brilstra EH, Volker-Touw CML, van Binsbergen E, Revah-Politi A, Pereira E, McBrian D, Pacault M, Isidor B, Le Caignec C, Gilbert-Dussardier B, Bilan F, Heinzen EL, Goldstein DB, Stevens SJC, Sands TT. NBEA: Developmental disease gene with early generalized epilepsy phenotypes. Ann Neurol 2018; 84:788-795. [PMID: 30269351 DOI: 10.1002/ana.25350] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/27/2018] [Accepted: 09/23/2018] [Indexed: 12/14/2022]
Abstract
NBEA is a candidate gene for autism, and de novo variants have been reported in neurodevelopmental disease (NDD) cohorts. However, NBEA has not been rigorously evaluated as a disease gene, and associated phenotypes have not been delineated. We identified 24 de novo NBEA variants in patients with NDD, establishing NBEA as an NDD gene. Most patients had epilepsy with onset in the first few years of life, often characterized by generalized seizure types, including myoclonic and atonic seizures. Our data show a broader phenotypic spectrum than previously described, including a myoclonic-astatic epilepsy-like phenotype in a subset of patients. Ann Neurol 2018;84:796-803.
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Affiliation(s)
- Maureen S Mulhern
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY
| | - Constance Stumpel
- Department of Clinical Genetics and School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Nicholas Stong
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY
| | - Han G Brunner
- Department of Clinical Genetics and School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands.,Department of Human Genetics, Donders Institute for Brain, Cognition, and Behavior, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Louise Bier
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY
| | - Natalie Lippa
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY
| | - James Riviello
- Department of Neurology, Columbia University Department of Neurology, New York, NY
| | - Rob P W Rouhl
- Department of Neurology, Maastricht University Medical Center, Maastricht, the Netherlands.,Academic Center for Epileptology, Kempenhaeghe/Maastricht University Medical Center, Maastricht, the Netherlands.,School for Mental Health and Neuroscience, Maastricht University, Maastricht, the Netherlands
| | - Marlies Kempers
- Department of Clinical Genetics, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Rolph Pfundt
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behavior, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Alexander P A Stegmann
- Department of Clinical Genetics and School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | | | | | - Anna Lehman
- Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Elena Lopez-Rangel
- Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nada Houcinat
- University of Burgundy-Franche-Comté, UMR1231 GAD, INSERM, Dijon, France.,Dijon Bourgogne University Hospital Center, Rare Diseases Reference Center "Developmental Anomalies and Informational Syndromes," Genetic Center, FHU-TRANSLAD, Dijon, France
| | - Magalie Barth
- Department of Biochemistry and Genetics, Angers University Hospital Center, Angers, France
| | | | - Mariette J V Hoffer
- Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - Sarah Weckhuysen
- Center for Molecular Neurology, VIB, Neurogenetics Group, Antwerp, Belgium.,Laboratory of Neurogenetics, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium.,Department of Neurology, University Hospital Antwerp, Antwerp, Belgium
| | | | - Jolien Roovers
- Center for Molecular Neurology, VIB, Neurogenetics Group, Antwerp, Belgium.,Laboratory of Neurogenetics, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium
| | - Tania Djemie
- Center for Molecular Neurology, VIB, Neurogenetics Group, Antwerp, Belgium.,Laboratory of Neurogenetics, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium.,Department of Neurology, University Hospital Antwerp, Antwerp, Belgium
| | - Diana Barca
- Pediatric Neurology Clinic, Al Obregia Hospital, Carol Davila University of Medicine, Bucharest, Romania
| | - Berten Ceulemans
- Department of Pediatric Neurology, University Hospital Antwerp, Antwerp, Belgium
| | - Dana Craiu
- Pediatric Neurology Clinic, Al Obregia Hospital, Carol Davila University of Medicine, Bucharest, Romania
| | - Johannes R Lemke
- Institute for Human Genetics, University of Leipzig Hospitals and Clinics, Leipzig, Germany
| | - Christian Korff
- Pediatric Neurology Unit, Child and Adolescent Department, University Hospitals, Geneva, Switzerland
| | | | | | - Zsuzsanna Siegler
- Bethesda Children's Hospital, Department of Neurology, Budapest, Hungary
| | - Susan M Hiatt
- HudsonAlpha Institute for Biotechnology, Huntsville, AL
| | | | - E Martina Bebin
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL
| | - Lot Snijders Blok
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behavior, Radboud University Medical Center, Nijmegen, the Netherlands.,Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
| | - Hermine E Veenstra-Knol
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Evan H Baugh
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY
| | - Eva H Brilstra
- University Medical Center Utrecht, Department of Genetics, Utrecht, the Netherlands
| | | | - Ellen van Binsbergen
- University Medical Center Utrecht, Department of Genetics, Utrecht, the Netherlands
| | - Anya Revah-Politi
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY
| | - Elaine Pereira
- Division of Clinical Genetics, Department of Pediatrics, New York-Presbyterian Morgan Stanley Children's Hospital, Columbia University Medical Center, New York, NY
| | - Danielle McBrian
- Department of Neurology, Columbia University Department of Neurology, New York, NY
| | - Mathilde Pacault
- Genetics Service, Nantes University Hospital Center, Nantes, France
| | - Bertrand Isidor
- Genetics Service, Nantes University Hospital Center, Nantes, France
| | | | - Brigitte Gilbert-Dussardier
- Genetics Service, Poitiers University Hospital Center, Poitiers, France.,University of Poitiers, EA3808 NEUVACOD, Poitiers, France
| | - Frederic Bilan
- Genetics Service, Poitiers University Hospital Center, Poitiers, France.,University of Poitiers, EA3808 NEUVACOD, Poitiers, France
| | - Erin L Heinzen
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY.,Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY
| | - David B Goldstein
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY
| | - Servi J C Stevens
- Department of Clinical Genetics and School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Tristan T Sands
- Columbia University Medical Center, Institute for Genomic Medicine, New York, NY.,Department of Neurology, Columbia University Department of Neurology, New York, NY
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10
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Naoufal R, Legendre M, Couet D, Gilbert-Dussardier B, Kitzis A, Bilan F, Harbuz R. Association of structural and numerical anomalies of chromosome 22 in a patient with syndromic intellectual disability. Eur J Med Genet 2016; 59:483-7. [PMID: 27452446 DOI: 10.1016/j.ejmg.2016.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 06/02/2016] [Accepted: 07/17/2016] [Indexed: 12/28/2022]
Abstract
Array comparative genomic hybridization (aCGH) is now widely adopted as a first-tier clinical diagnostic test for patients with developmental delay (DD)/intellectual disability (ID), autism spectrum disorders, and multiple congenital anomalies. Nevertheless, classic karyotyping still has its impact in diagnosing genetic diseases, particularly mosaic cases. We report on a 30 year old patient with syndromic intellectual disability, a 22q13.2 microdeletion and mosaic trisomy 22. The patient had the following clinical features: intrauterine growth retardation at birth, hypotonia, cryptorchidism, facial asymmetry, enophthalmus, mild prognathism, bifid uvula, hypoplastic upper limb phalanges, DD including speech delay, and ID. Whole genome aCGH showed a de novo 1 Mb interstitial heterozygous deletion in 22q13.2, confirmed by fluorescence in situ hybridization in all cells examined. Moreover, 18% cells had an extra chromosome 22 suggesting a trisomy 22 mosaicism. Almost all 22q13 deletions published so far have been terminal deletions with variable sizes (100 kb to over 9 Mb). Very few cases of interstitial 22q13.2 deletions were reported. In its mosaic form, trisomy 22 is compatible with life, and there are about 20 reports in the literature. It has a variable clinical presentation: growth restriction, dysmorphic features, cardiovascular abnormalities, hemihyperplasia, genitourinary tract anomalies and ID. Neurodevelopmental outcome ranges from normal to severe DD. The patient presents clinical features that are common to both the interstitial 22q13 deletion and the mosaic trisomy 22; characteristics related to the interstitial deletion alone and others explained solely by the mosaic trisomy. Our case points out the role of conventional cytogenetic tools in mosaic cases that could be missed by microarray technology. We therefore suggest the combination of both conventional and molecular karyotyping in the investigation of certain genetic diseases.
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Affiliation(s)
- Rania Naoufal
- Service de Génétique, Centre de Référence Anomalies du Développement Ouest, CHU de Poitiers, France.
| | - Marine Legendre
- Service de Génétique, Centre de Référence Anomalies du Développement Ouest, CHU de Poitiers, France; EA 3808, Université de Poitiers, France
| | - Dominique Couet
- Service de Génétique, Centre de Référence Anomalies du Développement Ouest, CHU de Poitiers, France; EA 3808, Université de Poitiers, France
| | - Brigitte Gilbert-Dussardier
- Service de Génétique, Centre de Référence Anomalies du Développement Ouest, CHU de Poitiers, France; EA 3808, Université de Poitiers, France
| | - Alain Kitzis
- Service de Génétique, Centre de Référence Anomalies du Développement Ouest, CHU de Poitiers, France; EA 3808, Université de Poitiers, France
| | - Frederic Bilan
- Service de Génétique, Centre de Référence Anomalies du Développement Ouest, CHU de Poitiers, France; EA 3808, Université de Poitiers, France
| | - Radu Harbuz
- Service de Génétique, Centre de Référence Anomalies du Développement Ouest, CHU de Poitiers, France; EA 3808, Université de Poitiers, France
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11
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Busa T, Legendre M, Bauge M, Quarello E, Bretelle F, Bilan F, Sigaudy S, Gilbert-Dussardier B, Philip N. Prenatal findings in children with early postnatal diagnosis of CHARGE syndrome. Prenat Diagn 2016; 36:561-7. [DOI: 10.1002/pd.4825] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/05/2016] [Accepted: 04/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Tiffany Busa
- Unité de génétique clinique; APHM, CHU Timone-Enfants; Marseille France
| | | | - Marie Bauge
- Centre pluridisciplinaire de diagnostic prénatal; APHM, CHU Timone-Enfants; Marseille France
| | - Edwin Quarello
- Unité d'Echographies Obstétricales; Hôpital Saint-Joseph; Marseille France
| | - Florence Bretelle
- Centre pluridisciplinaire de diagnostic prénatal; APHM, CHU Timone-Enfants; Marseille France
| | | | - Sabine Sigaudy
- Unité de génétique clinique; APHM, CHU Timone-Enfants; Marseille France
- Centre pluridisciplinaire de diagnostic prénatal; APHM, CHU Timone-Enfants; Marseille France
| | | | - Nicole Philip
- Unité de génétique clinique; APHM, CHU Timone-Enfants; Marseille France
- Centre pluridisciplinaire de diagnostic prénatal; APHM, CHU Timone-Enfants; Marseille France
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12
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Hyon C, Chantot-Bastaraud S, Harbuz R, Bhouri R, Perrot N, Peycelon M, Sibony M, Rojo S, Piguel X, Bilan F, Gilbert-Dussardier B, Kitzis A, McElreavey K, Siffroi JP, Bashamboo A. Refining the regulatory region upstream ofSOX9associated with 46,XX testicular disorders of Sex Development (DSD). Am J Med Genet A 2015; 167A:1851-8. [DOI: 10.1002/ajmg.a.37101] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 03/05/2015] [Indexed: 01/10/2023]
Affiliation(s)
- Capucine Hyon
- AP-HP; Hôpitaux Universitaires Est Parisien; Hôpital Trousseau; Service de Génétique et d'Embryologie médicales; Paris France
- INSERM UMR_S933; Paris France
- UPMC Univ Paris 06; UFR de Médecine Pierre et Marie Curie; Paris France
| | - Sandra Chantot-Bastaraud
- AP-HP; Hôpitaux Universitaires Est Parisien; Hôpital Trousseau; Service de Génétique et d'Embryologie médicales; Paris France
| | - Radu Harbuz
- Service Génétique Médicale; CHU Poitiers; France
| | - Rakia Bhouri
- AP-HP; Hôpitaux Universitaires Est Parisien; Hôpital Trousseau; Service de Génétique et d'Embryologie médicales; Paris France
| | - Nicolas Perrot
- Department of Radiology; AP-HP; Hôpitaux Universitaires Est Parisien; Hôpital Tenon; Paris France
| | | | - Mathilde Sibony
- Department of Pathology; AP-HP; Hôpitaux Universitaires Est Parisien; Hôpital Tenon; Paris France
| | - Sandra Rojo
- Institut Pasteur; Human Developmental Genetics; Paris France
| | | | | | - Brigitte Gilbert-Dussardier
- Service Génétique Médicale; CHU Poitiers; France
- Centre de Référence Anomalies du Développement Ouest; CHU Poitiers; France
| | - Alain Kitzis
- Service Génétique Médicale; CHU Poitiers; France
| | - Ken McElreavey
- Institut Pasteur; Human Developmental Genetics; Paris France
| | - Jean-Pierre Siffroi
- AP-HP; Hôpitaux Universitaires Est Parisien; Hôpital Trousseau; Service de Génétique et d'Embryologie médicales; Paris France
- INSERM UMR_S933; Paris France
- UPMC Univ Paris 06; UFR de Médecine Pierre et Marie Curie; Paris France
| | - Anu Bashamboo
- Institut Pasteur; Human Developmental Genetics; Paris France
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13
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Gregory LC, Gevers EF, Baker J, Kasia T, Chong K, Josifova DJ, Caimari M, Bilan F, McCabe MJ, Dattani MT. Structural pituitary abnormalities associated with CHARGE syndrome. J Clin Endocrinol Metab 2013; 98:E737-43. [PMID: 23526466 PMCID: PMC3708033 DOI: 10.1210/jc.2012-3467] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION CHARGE syndrome is a multisystem disorder that, in addition to Kallmann syndrome/isolated hypogonadotrophic hypogonadism, has been associated with anterior pituitary hypoplasia (APH). However, structural abnormalities such as an ectopic posterior pituitary (EPP) have not yet been described in such patients. OBJECTIVE The aims of the study were: 1) to describe the association between CHARGE syndrome and a structurally abnormal pituitary gland; and 2) to investigate whether CHD7 variants, which are identified in 65% of CHARGE patients, are common in septo-optic dysplasia /hypopituitarism. METHODS We describe 2 patients with features of CHARGE and EPP. CHD7 was sequenced in these and other patients with septo-optic dysplasia/hypopituitarism. RESULTS EPP, APH, and GH, TSH, and probable LH/FSH deficiency were present in 1 patient, and EPP and APH with GH, TSH, LH/FSH, and ACTH deficiency were present in another patient, both of whom had features of CHARGE syndrome. Both had variations in CHD7 that were novel and undetected in control cohorts or in the international database of CHARGE patients, but were also present in their unaffected mothers. No CHD7 variants were detected in the patients with septo-optic dysplasia/hypopituitarism without additional CHARGE features. CONCLUSION We report a novel association between CHARGE syndrome and structural abnormalities of the pituitary gland in 2 patients with variations in CHD7 that are of unknown significance. However, CHD7 mutations are an uncommon cause of septo-optic dysplasia or hypopituitarism. Our data suggest the need for evaluation of pituitary function/anatomy in patients with CHARGE syndrome.
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Affiliation(s)
- Louise C Gregory
- Developmental Endocrinology Research Group, Clinical and Molecular Genetics Unit, University College London Institute of Child Health, London WC1N 1EH, United Kingdom
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14
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Colin E, Bonneau D, Boussion F, Guichet A, Delorme B, Triau S, Gillard P, Kitzis A, Bilan F. Prenatal diagnosis of CHARGE syndrome by identification of a novel CHD7 mutation in a previously unaffected family. Prenat Diagn 2012; 32:692-4. [PMID: 22517486 DOI: 10.1002/pd.3876] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
CHARGE syndrome comprises ocular coloboma (C), heart malformation (H), choanal atresia (A), retardation of growth and/or anomalies of the central nervous system (R), genital anomalies (G) and ear anomalies (E). Prenatal diagnosis of CHARGE syndrome may be suspected in the presence of specific major anomalies at ultrasound examination. We describe prenatal diagnosis of CHARGE syndrome confirmed by identification of a mutation in CHD7 gene in a previously unaffected family.
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Masurel-Paulet A, Andrieux J, Callier P, Cuisset JM, Le Caignec C, Holder M, Thauvin-Robinet C, Doray B, Flori E, Alex-Cordier MP, Beri M, Boute O, Delobel B, Dieux A, Vallee L, Jaillard S, Odent S, Isidor B, Beneteau C, Vigneron J, Bilan F, Gilbert-Dussardier B, Dubourg C, Labalme A, Bidon C, Gautier A, Pernes P, Pinoit JM, Huet F, Mugneret F, Aral B, Jonveaux P, Sanlaville D, Faivre L. Delineation of 15q13.3 microdeletions. Clin Genet 2010; 78:149-61. [PMID: 20236110 DOI: 10.1111/j.1399-0004.2010.01374.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The increasing use of array-comparative genomic hybridization (array-CGH) to identify copy number variations (CNVs) in patients with developmental delay (DD), mental retardation and/or dysmorphic features has allowed the recent recognition of numerous genomic imbalances, including the 15q13.3 microdeletion. Patients with this microdeletion generally present with relatively consistent breakpoints at BP4 and BP5, which include the CHRNA7 gene. About 100 index cases have been reported since the first publication in 2008. This large number of patients ascertained through highly variable samples has been necessary to describe the full phenotypic spectrum of this microdeletion, ranging from mental retardation with dysmorphic features, epilepsy, neuropsychiatric disturbances with or without cognitive impairment to complete absence of anomalies. Here, we describe a collaborative study reporting a new cohort of 12 index patients and 13 relatives carrying a heterozygous BP4-BP5 microdeletion out of a series of 4625 patients screened by array-CGH for DD. We confirm the clinical expressivity of the disease as well as the incomplete penetrance in seven families. We showed through a review of the literature that males are more likely to be symptomatic. Sequence analysis of CHRNA7 yielded no data to support the unmasking of recessive variants as a cause of phenotypic variability. We also report the first patient carrying a 15q13.3 homozygous microdeletion inherited from both parents. He had severe epileptic encephalopathy with retinopathy, autistic features and choreoathetosis. Besides the classical approximately 1.5 Mb BP4-BP5 microdeletion, we also describe three index patients and two relatives with a smaller 500 kb microdeletion, including the CHRNA7 gene.
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Affiliation(s)
- A Masurel-Paulet
- Centre de Génétique et Centre de Référence Anomalies du développement et syndromes malformatifs, Hôpital d'Enfants, CHU, Dijon
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Fauret AL, Bilan F, Patri S, Couet D, Marechaud M, Pierre F, Gilbert-Dussardier B, Kitzis A. [Molecular biology usefulness for rapid diagnosis of Down's syndrome and common aneuploidies]. ACTA ACUST UNITED AC 2009; 37:611-9. [PMID: 19574080 DOI: 10.1016/j.gyobfe.2009.05.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2008] [Accepted: 05/22/2009] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Trisomy of chromosome 13, 18, 21 and sex chromosome aneuploidies are the most common chromosomal abnormalities encountered in prenatal screening and are responsible for polymaformative syndrome associated with severe mental retardation. This high degree of morbidity justifies the prenatal diagnosis of these aneuploidies. Fetal nuchal translucency measurement and maternal serum biochemical marker assessment are the method of choice used for antenatal screening of aneuploidies. This prenatal screening leads to numerous maternal samplings followed by karyotyping which is cost-effective, time consuming, while results are generally returned between 2 and 3 weeks. Our study describes the research of common aneuploidies by molecular biology. We have used on one hand the MLPA kit (MRC Holland) based on amplification of specific DNA probes that hybridize with chromosomes 13, 18, 21, X, Y. On the other hand we have developed multiplex fluorescent PCR, amplifying microsatellite DNA sequences. PATIENTS AND METHODS We have evaluated the efficiency of these two techniques to detect chromosomal abnormalities by screening 400 amniotic fluids or chorionic villi samples obtained from pregnant women presenting a high risk of chromosomal aneuploidy. RESULTS We have found four trisomies 21, one trisomy 13, one monosomy 13, one trisomy 18, two triploidies, one trisomy X and one Klinefelter syndrome. DISCUSSION AND CONCLUSION In our study we have detected by molecular biology, in less than 48 h, 100% of common chromosomal aneuploidies without false positive or false negative results which could lead molecular biology as a method of choice for the rapid detection of common aneuploidies in addition to fetal karyotyping.
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Affiliation(s)
- A-L Fauret
- Laboratoire de génétique cellulaire et moléculaire, CHU de Poitiers, BP 577, 86021 Poitiers cedex, France
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Brugnon F, Bilan F, Heraud MC, Grizard G, Janny L, Creveaux I. Outcome of intracytoplasmic sperm injection for a couple in which the man is carrier of CFTR p.[R74W;V201M;D1270N] and p.P841R mutations and his spouse a heterozygous carrier of p.F508del mutation of the cystic fibrosis transmembrane conductance regulator gene. Fertil Steril 2008; 90:2004.e23-6. [DOI: 10.1016/j.fertnstert.2008.05.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 05/05/2008] [Accepted: 05/15/2008] [Indexed: 11/25/2022]
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Fresquet F, Sterlin A, Melin P, Baudis M, Pasquet M, Becq F, Kitzis A, Bilan F. Molecular cellular and functional study of seven rare mutations of CFTR. J Cyst Fibros 2008. [DOI: 10.1016/s1569-1993(08)60028-4] [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: 11/24/2022]
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