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1. De novo TBR1 variants cause a neurocognitive phenotype with ID and autistic traits: report of 25 new individuals and review of the literature

Author

Nambot, Sophie, Faivre, Laurence, Mirzaa, Ghayda, Thevenon, Julien, Bruel, Ange-Line, Mosca-Boidron, Anne-Laure, Masurel-Paulet, Alice, Goldenberg, Alice, Le Meur, Nathalie, Charollais, Aude, Mignot, Cyril, Petit, Florence, Rossi, Massimiliano, Metreau, Julia, Layet, Valérie, Amram, Daniel, Boute-Bénéjean, Odile, Bhoj, Elizabeth, Cousin, Margot, Kruisselbrink, Teresa, Lanpher, Brendan, Klee, Eric, Fiala, Elise, Grange, Dorothy, Meschino, Wendy, Hiatt, Susan, Cooper, Gregory, Olivié, Hilde, Smith, Wendy, Dumas, Meghan, Lehman, Anna, Inglese, Cara, Nizon, Mathilde, Guerrini, Renzo, Vetro, Annalisa, Kaplan, Eitan, Miramar, Dolores, van Gils, Julien, Fergelot, Patricia, Bodamer, Olaf, Herkert, Johanna, Pajusalu, Sander, Õunap, Katrin, Filiano, James, Smol, Thomas, Piton, Amélie, Gérard, Bénédicte, Chantot-Bastaraud, Sandra, Bienvenu, Thierry, Li, Dong, Juusola, Jane, Devriendt, Koen, Bilan, Frederic, Poé, Charlotte, Chevarin, Martin, Jouan, Thibaud, Tisserant, Emilie, Rivière, Jean-Baptiste, Tran Mau-Them, Frédéric, Philippe, Christophe, Duffourd, Yannis, Dobyns, William, Hevner, Robert, Thauvin-Robinet, Christel, Couvet, Sandrine, Centre de génétique - Centre de référence des maladies rares, anomalies du développement et syndromes malformatifs (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Lipides - Nutrition - Cancer [Dijon - U1231] (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, FHU TRANSLAD (CHU de Dijon), Center for Integrative Brain Research [Seattle, WA, USA], University of Washington [Seattle]-Seattle Children's Research Institute, Department of Pediatrics [Seattle], University of Washington [Seattle], Unité fonctionnelle d' Innovation en Diagnostic Génomique des Maladies Rares (CHU Dijon) (UF6254), Département de génétique [CHU Rouen] (Centre Normandie de Génomique et de Médecine Personnalisée), CHU Rouen, Normandie Université (NU)-Normandie Université (NU), Service de pédiatrie médicale et médecine de l'adolescent [Rouen], Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Service de génétique et embryologie médicales [CHU Trousseau], CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Clinique de Génétique médicale Guy Fontaine [CHRU LIlle], Service de Génétique [CHU Lyon] (Centre de pathologie de l'Est), Hospices civils de Lyon (HCL), Centre de recherche en neurosciences de Lyon - Lyon Neuroscience Research Center (CRNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Genetics of Neurodevelopment (GENDEV), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Service de Neurologie Pédiatrique [CHU Bicêtre], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Bicêtre, Département de génétique (groupe hospitalier le Havre), Groupe Hospitalier du Havre, Centre Hospitalier Intercommunal de Créteil (CHIC), Department of Pediatrics [Philadelphia, PA, USA] (Division of Genetics), Children’s Hospital of Philadelphia (CHOP ), The Center for Applied Genomics [Philadelphia, PA, USA], Mayo Clinic [Rochester], Department of Pediatrics [Saint Louis, MO, USA] (Division of Genetics and Genomic Medicine), Washington University in Saint Louis (WUSTL), Department of Genetics [Saint-Louis], HudsonAlpha Institute for Biotechnology [Huntsville, AL], University Hospitals Leuven [Leuven], Maine Medical Center, University of British Columbia [Vancouver], Service de génétique médicale - Unité de génétique clinique [Nantes], Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes), Meyer Children's Hospital [Florence, Italie], Università degli Studi di Firenze = University of Florence (UniFI), CHU Bordeaux [Bordeaux], Department of Genetics [Boston], Harvard Medical School [Boston] (HMS), University Medical Center Groningen [Groningen] (UMCG), University of Tartu, Dartmouth Hitchcock Medical Center [Lebanon, NH, USA] (DHMC), Service de Génétique Médicale [Lille], Institut de génétique médicale-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Laboratoire de Diagnostic Génétique [CHU Strasbourg], Université de Strasbourg (UNISTRA)-CHU Strasbourg, Maladies génétiques d'expression pédiatrique [CHU Trousseau] (Inserm U933), Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Trousseau [APHP], UF de Génétique chromosomique [CHU Trousseau], Service de Génétique et Biologie Moléculaires [CHU Cochin], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Cochin [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), GeneDx [Gaithersburg, MD, USA], Service Génétique Médicale [CHU Poitiers], Centre hospitalier universitaire de Poitiers (CHU Poitiers), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Agro Dijon, and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)

Subjects
Proband, Candidate gene, INTELLECTUAL DISABILITY, MESH: Hippocampus, [SDV]Life Sciences [q-bio], MESH: Cognition, MESH: Neocortex, MESH: Child, Intellectual disability, MESH: Craniofacial Abnormalities, MESH: Animals, MESH: Syndrome, Genetics (clinical), Genetics, PROGENITORS, biology, Phenotype, NEOCORTEX, [SDV] Life Sciences [q-bio], EXPRESSION, GENES, MESH: Mutation, MESH: T-Box Domain Proteins, MESH: Autistic Disorder, [SDV.GEN.GH] Life Sciences [q-bio]/Genetics/Human genetics, MESH: Phenotype, Article, REGION, MESH: Intellectual Disability, NEUROGENESIS, Dysgenesis, FEZF2, medicine, MESH: Mice, MESH: Adolescent, MESH: Humans, MUTATIONS, business.industry, MESH: Child, Preschool, MESH: Adult, medicine.disease, MESH: Male, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, biology.protein, Autism, TBR1, business, Neurocognitive, MESH: Female
Abstract

International audience; TBR1, a T-box transcription factor expressed in the cerebral cortex, regulates the expression of several candidate genes for autism spectrum disorders (ASD). Although TBR1 has been reported as a high-confidence risk gene for ASD and intellectual disability (ID) in functional and clinical reports since 2011, TBR1 has only recently been recorded as a human disease gene in the OMIM database. Currently, the neurodevelopmental disorders and structural brain anomalies associated with TBR1 variants are not well characterized. Through international data sharing, we collected data from 25 unreported individuals and compared them with data from the literature. We evaluated structural brain anomalies in seven individuals by analysis of MRI images, and compared these with anomalies observed in TBR1 mutant mice. The phenotype included ID in all individuals, associated to autistic traits in 76% of them. No recognizable facial phenotype could be identified. MRI analysis revealed a reduction of the anterior commissure and suggested new features including dysplastic hippocampus and subtle neocortical dysgenesis. This report supports the role of TBR1 in ID associated with autistic traits and suggests new structural brain malformations in humans. We hope this work will help geneticists to interpret TBR1 variants and diagnose ASD probands.

Published
2020
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2. Phenotypic spectrum associated with SPECC1L pathogenic variants: new families and critical review of the nosology of Teebi, Opitz GBBB, and Baraitser-Winter syndromes

Author

Dominique Bonneau, Luis A Gonzalez-Nieto, Stine Leenskjold, Patrick Callier, Isabelle Thiffault, Katheryn Grand, Pauline Bogaard, Séverine Drunat, Elizabeth J. Bhoj, Hakon Hakonarson, Katherine T. Wild, Elaine H. Zackai, Elena Repnikova, Damien Haye, Irene K Nielsen, Mirena C Astiazaran, Irfan Saadi, Daphné Lehalle, Ida Charlotte Bay Lund, Shivarajan M. Amudhavalli, Annick Toutain, Alain Verloes, Ana Sofia Carvalho, Dong Li, Carol J Saunders, Yoann Vial, Kadri Karaer, The Center for Applied Genomics [Philadelphia, PA, USA], Children’s Hospital of Philadelphia (CHOP ), Division of Human Genetics [Philadelphia, PA, USA], Département de génétique [Robert Debré], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-AP-HP Hôpital universitaire Robert-Debré [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Service de génétique [Tours], Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Hôpital Bretonneau, Physiopathologie Cardiovasculaire et Mitochondriale (MITOVASC), Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), University of Coimbra [Portugal] (UC), Equipe GAD (LNC - U1231), Lipides - Nutrition - Cancer [Dijon - U1231] (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, The Center for Applied Genomics, Neuroprotection du Cerveau en Développement / Promoting Research Oriented Towards Early Cns Therapies (PROTECT), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Robert Debré-Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), Division of Human Genetics, Department of Pediatrics, The Children's Hospital of Philadelphia, Hôpital Bretonneau-Centre Hospitalier Régional Universitaire de Tours (CHRU Tours), and Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
0301 basic medicine, Nosology, Male, Opitz BBBG syndrome, [SDV]Life Sciences [q-bio], 030105 genetics & heredity, Craniofacial Abnormalities, Cranial neural crest, Intellectual disability, SPECC1L, Child, Genetics (clinical), Growth Disorders, Genetics, Hypospadias, Hypertelorism, General Medicine, Omphalocele, Pedigree, Phenotype, Child, Preschool, Female, Hand Deformities, Congenital, Hydrocephalus, Adult, Adolescent, Foot Deformities, Congenital, Biology, Actin cytoskeleton organization, Article, Craniosynostosis, 03 medical and health sciences, Esophagus, medicine, Teebi hypertelorism syndrome, Humans, Abnormalities, Multiple, Obesity, Craniofacial, Bicornuate uterus, MID1, Facies, medicine.disease, Phosphoproteins, 030104 developmental biology, Mutation, Mental Retardation, X-Linked, Spindle organization
Abstract

International audience; The SPECC1L protein plays a role in adherens junctions involved in cell adhesion, actin cytoskeleton organization, microtubule stabilization, spindle organization and cytokinesis. It modulates PI3K-AKT signaling and controls cranial neural crest cell delamination during facial morphogenesis. SPECC1L causative variants were first identified in individuals with oblique facial clefts. Recently, causative variants in SPECC1L were reported in a pedigree reported in 1988 as atypical Opitz GBBB syndrome. Six families with SPECC1L variants have been reported thus far. We report here eight further pedigrees with SPECC1L variants, including a three-generation family, and a further individual of a previously published family. We discuss the nosology of Teebi and GBBB, and the syndromes related to SPECC1L variants. Although the phenotype of individuals with SPECC1L mutations shows overlap with Opitz syndrome in its craniofacial anomalies, the canonical laryngeal malformations and male genital anomalies are not observed. Instead, individuals with SPECCL1 variants have branchial fistulae, omphalocele, diaphragmatic hernias, and uterus didelphis. We also point to the clinical overlap of SPECC1L syndrome with mild Baraitser-Winter craniofrontofacial syndrome: they share similar dysmorphic features (wide, short nose with a large tip, cleft lip and palate, blepharoptosis, retrognathia, and craniosynostosis), although intellectual disability, neuronal migration defect, and muscular problems remain largely specific to Baraitser-Winter syndrome. In conclusion, we suggest that patients with pathogenic variants in SPECC1L should not be described as "dominant (or type 2) Opitz GBBB syndrome", and instead should be referred to as "SPECC1L syndrome" as both disorders show distinctive, non overlapping developmental anomalies beyond facial communalities.

Published
2018
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3. De Novo Mutations in Protein Kinase Genes CAMK2A and CAMK2B Cause Intellectual Disability

Author

Kury, S., Woerden, G.M. van, Besnard, T., Onori, M.P., Latypova, X., Towne, M.C., Cho, M.T., Prescott, T.E., Ploeg, M.A., Sanders, S., Stessman, H.A.F., Pujol, A., Distel, ben, Robak, L.A., Bernstein, J.A., Denomme-Pichon, A.S., Lesca, G., Sellars, E.A., Berg, J., Carre, W., Busk, O.L., Bon, B.W.M. van, Waugh, J.L., Deardorff, M., Hoganson, G.E., Bosanko, K.B., Johnson, D.S., Dabir, T., Holla, O.L., Sarkar, A., Tveten, K., Bellescize, J. de, Braathen, G.J., Terhal, P.A., Grange, D.K., Haeringen, A. van, Lam, C., Mirzaa, G., Burton, J., Bhoj, E.J., Douglas, J., Santani, A.B., Nesbitt, A.I., Helbig, K.L., Andrews, M.V., Begtrup, A., Tang, S., Gassen, K.L.I. van, Juusola, J., Foss, K., Enns, G.M., Moog, U., Hinderhofer, K., Paramasivam, N., Lincoln, S., Kusako, B.H., Lindenbaum, P., Charpentier, E., Nowak, C.B., Cherot, E., Simonet, T., Ruivenkamp, C.A.L., Hahn, S., Brownstein, C.A., Xia, F., Schmitt, S., Deb, W., Bonneau, D., Nizon, M., Quinquis, D., Chelly, J., Rudolf, G., Sanlaville, D., Parent, P., Gilbert-Dussardier, B., Toutain, A., Sutton, V.R., Thies, J., Peart-Vissers, L.E.L.M., Boisseau, P., Vincent, M., Grabrucker, A.M., Dubourg, C., Tan, W.H., Verbeek, N.E., Granzow, M., Santen, G.W.E., Shendure, J., Isidor, B., Pasquier, L., Redon, R., Yang, Y.P., State, M.W., Kleefstra, T., Cogne, B., Petrovski, S., Retterer, K., Eichler, E.E., Rosenfeld, J.A., Agrawal, P.B., Bezieau, S., Odent, S., Elgersma, Y., Mercier, S., Undiagnosed Dis Network, GEM HUGO, Deciphering Dev Dis Study, Service de génétique médicale [CHU Nantes], Centre hospitalier universitaire de Nantes (CHU Nantes), Department of Neuroscience [Rotterdam, the Netherlands], Erasmus University Medical Center [Rotterdam] (Erasmus MC), Expertise Center for Neurodevelopmental Disorders [Rotterdam, the Netherlands] (ENCORE), Genomics Program and Division of Genetics [Boston, USA], Harvard Medical School [Boston] (HMS)-Boston Children's Hospital-The Manton Center for Orphan Disease Research, Gene Discovery Core [Boston, MA, USA] ( The Manton Center for Orphan Disease Research), Harvard Medical School [Boston] (HMS)-Boston Children's Hospital, GeneDx [Gaithersburg, MD, USA], Department of Medical Genetics [Skien, Norway], Telemark Hospital Trust [Skien, Norway], Department of Psychiatry [San Francisco, CA, USA], University of California [San Francisco] (UCSF), University of California-University of California, Department of Genome Sciences [Seattle] (GS), University of Washington [Seattle], Department of Pharmacology [Omaha, NE, USA], Creighton University Medical School [Omaha, NE, USA], Neurometabolic Diseases Laboratory [Barcelona, Spain], Institut d'Investigació Biomèdica de Bellvitge [Barcelone] (IDIBELL), Centre for Biomedical Research on Rare Diseases [Barcelona, Spain] (CIBERER), Hospital Sant Joan de Déu [Barcelona], Institució Catalana de Recerca i Estudis Avançats (ICREA), Department of Medical Biochemistry [Amsterdam, the Netherlands] (Academic Medical Center), University of Amsterdam [Amsterdam] (UvA), Department of Molecular and Human Genetics [Houston, USA], Baylor College of Medecine, Department of Pediatrics [Stanford], Stanford Medicine, Stanford University-Stanford University, Département de Biochimie et Génétique [Angers], Université d'Angers (UA)-Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM), Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université d'Angers (UA), Service de Génétique [HCL, Lyon] (Centre de Référence des Anomalies du Développement), Hospices civils de Lyon (HCL), Centre de recherche en neurosciences de Lyon (CRNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Section of Genetics and Metabolism [Little Rock, AR, USA], University of Arkansas for Medical Sciences (UAMS), Molecular and Clinical Medicine [Dundee, UK] (School of Medicine), University of Dundee [UK]-Ninewells Hospital & Medical School [Dundee, UK], Laboratoire de Génétique Moléculaire & Génomique [CHU Rennes], CHU Pontchaillou [Rennes], Department of Human Genetics [Nijmegen], Radboud University Medical Center [Nijmegen], Department of Neurology [Boston], Harvard Medical School [Boston] (HMS)-Massachusetts General Hospital [Boston], Department of Pediatrics [Philadelphia, PA, USA] (Division of Genetics), Children’s Hospital of Philadelphia (CHOP ), Department of Pediatrics [Chicago, IL, USA] (College of Medicine), University of Illinois [Chicago] (UIC), University of Illinois System-University of Illinois System, Sheffield Children's NHS Foundation Trust, Northern Ireland Regional Genetics Centre [Belfast, UK], Belfast City Hospital-Belfast Health and Social Care Trust, Nottingham Regional Genetics Service [Nottingham, UK], City Hospital Campus [Nottingham, UK]-Nottingham University Hospitals NHS Trust [UK], Département d'Epilepsie, Sommeil et Neurophysiologie Pédiatrique [HCL, Lyon], Hospices Civils de Lyon (HCL), Department of Genetics [Utrecht, the Netherlands], University Medical Center [Utrecht], Department of Pediatrics [Saint Louis, MO, USA] (Division of Genetics and Genomic Medicine), Washington University in Saint Louis (WUSTL), Department of Clinical Genetics [Leiden, the Netherlands], Leiden University Medical Center (LUMC), Department of Pediatrics [Seattle, WA, USA] (Division of Genetic Medicine), University of Washington [Seattle]-Seattle Children’s Hospital, Center for Integrative Brain Research [Seattle, WA, USA], University of Washington [Seattle]-Seattle Children's Research Institute, The Center for Applied Genomics [Philadelphia, PA, USA], Division of Human Genetics [Philadelphia, PA, USA], Department of Pathology and Laboratory Medicine [Philadelphia, PA, USA], University of Pennsylvania [Philadelphia]-Perelman School of Medicine, University of Pennsylvania [Philadelphia], Department of Pathology and Laboratory Medicine [Philadelphia, PA, USA] (Perelman School of Medicine), Division of Clinical Genomics [Aliso Viejo, CA, USA], Ambry Genetics [Aliso Viejo, CA, USA], Division of Neurology [Philadelphia, PA, USA], Institute of Human Genetics [Heidelberg, Germany], Universität Heidelberg [Heidelberg], University of Heidelberg, Medical Faculty, unité de recherche de l'institut du thorax UMR1087 UMR6291 (ITX), Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Diagnostic Génétique [CHU Strasbourg], Université de Strasbourg (UNISTRA)-CHU Strasbourg, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg (UNISTRA), Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Service de Neurologie [CHU Strasbourg], Hôpital de Hautepierre [Strasbourg]-Centre Hospitalier Universitaire de Strasbourg (CHU de Strasbourg ), Département de génétique médicale en pédiatrie [CHRU Brest], Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), Service de Génétique [CHU Poitiers], Centre hospitalier universitaire de Poitiers (CHU Poitiers), Service de Génétique [CHRU Tours], Centre Hospitalier Régional Universitaire de Tours (CHRU TOURS), Department of Biological Sciences [Limerick, Ireland], University of Limerick (UL), Bernal Institute [Limerick, Ireland], Howard Hughes Medical Institute [Seattle], Howard Hughes Medical Institute (HHMI), Institut de Génétique et Développement de Rennes (IGDR), Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Service de Génétique Clinique [CHU Rennes] (Réseau de Génétique et Génomique Médicale), Hôpitaux Universitaires du Grand Ouest, The Wellcome Trust Sanger Institute [Cambridge], Department of Medicine [Melbourne, Australia], University of Melbourne-Austin Health, Division of Newborn Medicine [Boston, MA, USA], Immunobiology of Human αβ and γδ T Cells and Immunotherapeutic Applications (CRCINA-ÉQUIPE 1), Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCINA), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA), Neurosciences, Physiopathologie Cardiovasculaire et Mitochondriale (MITOVASC), Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours), Univ Angers, Okina, University of California [San Francisco] (UC San Francisco), University of California (UC)-University of California (UC), Centre de recherche en neurosciences de Lyon - Lyon Neuroscience Research Center (CRNL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de génétique moléculaire et génomique médicale [CHU Rennes], Nottingham University Hospitals NHS Trust (NUH)-City Hospital Campus [Nottingham, UK], Universiteit Leiden-Universiteit Leiden, Department of Pediatrics [Seattle, WA, USA], University of Pennsylvania-Perelman School of Medicine, University of Pennsylvania, Universität Heidelberg [Heidelberg] = Heidelberg University, Unité de recherche de l'institut du thorax (ITX-lab), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Service de génétique clinique [Rennes], Université de Rennes (UR)-CHU Pontchaillou [Rennes]-hôpital Sud, Université d'Angers (UA)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université d'Angers (UA)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes), Amsterdam Gastroenterology Endocrinology Metabolism, Medical Biochemistry, and Bernardo, Elizabeth

Subjects
0301 basic medicine, Male, de novo mutations, AMPAR, medicine.disease_cause, Inbred C57BL, Mice, 0302 clinical medicine, Intellectual disability, CAMK2A, Exome, Phosphorylation, Genetics (clinical), Genetics, Neurons, Mutation, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, Brain, Phenotype, NMDAR, intellectual disability, Female, Signal transduction, Rare cancers Radboud Institute for Health Sciences [Radboudumc 9], Signal Transduction, Glutamic Acid, [SDV.CAN]Life Sciences [q-bio]/Cancer, Biology, Article, Cell Line, 03 medical and health sciences, [SDV.CAN] Life Sciences [q-bio]/Cancer, medicine, Journal Article, Animals, Humans, Protein kinase A, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], synaptic plasticity, medicine.disease, Mice, Inbred C57BL, CAMK2, CAMK2B, 030104 developmental biology, HEK293 Cells, Synaptic plasticity, Calcium-Calmodulin-Dependent Protein Kinase Type 2, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

Contains fulltext : 182539.pdf (Publisher’s version ) (Closed access) Calcium/calmodulin-dependent protein kinase II (CAMK2) is one of the first proteins shown to be essential for normal learning and synaptic plasticity in mice, but its requirement for human brain development has not yet been established. Through a multi-center collaborative study based on a whole-exome sequencing approach, we identified 19 exceedingly rare de novo CAMK2A or CAMK2B variants in 24 unrelated individuals with intellectual disability. Variants were assessed for their effect on CAMK2 function and on neuronal migration. For both CAMK2A and CAMK2B, we identified mutations that decreased or increased CAMK2 auto-phosphorylation at Thr286/Thr287. We further found that all mutations affecting auto-phosphorylation also affected neuronal migration, highlighting the importance of tightly regulated CAMK2 auto-phosphorylation in neuronal function and neurodevelopment. Our data establish the importance of CAMK2A and CAMK2B and their auto-phosphorylation in human brain function and expand the phenotypic spectrum of the disorders caused by variants in key players of the glutamatergic signaling pathway.

Published
2017
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4. Mutations in TBCK, Encoding TBC1-Domain-Containing Kinase, Lead to a Recognizable Syndrome of Intellectual Disability and Hypotonia

Author

Bhoj, Elizabeth, Li, Dong, Harr, Margaret, Edvardson, Shimon, Elpeleg, Orly, Chisholm, Elizabeth, Juusola, Jane, Douglas, Ganka, Guillen Sacoto, Maria, Siquier-Pernet, Karine, Saadi, Abdelkrim, Bole-Feysot, Christine, Nitschke, Patrick, Narravula, Alekhya, Walke, Maria, Horner, Peter, Day-Salvatore, Peter, Jayakar, Parul, Vergano, Samantha, Tarnopolsky, Mark, Hegde, Madhuri, Colleaux, Laurence, Crino, Peter, Hakonarson, Hakon, Bhoj, Elizabeth J., Guillen Sacoto, Maria J., Horner, Michele B., Day-Salvatore, Debra-Lynn, Vergano, Samantha A. Schrier, Tarnopolsky, Mark A., The Center for Applied Genomics [Philadelphia, PA, USA], Children’s Hospital of Philadelphia (CHOP ), Department of Mathematics [University of British Columbia], University of British Columbia (UBC), Department of Genetics and Metabolic Diseases and the Monique and Jacques Roboh Department of Genetic Research, Hadassah Hebrew University Medical Center [Jerusalem], GeneDx [Gaithersburg, MD, USA], Imagine - Institut des maladies génétiques (IMAGINE - U1163), Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris Descartes - Paris 5 (UPD5), Université Sorbonne Paris Cité (USPC), CHU Necker - Enfants Malades [AP-HP], Plateforme de génomique [SFR Necker], Structure Fédérative de Recherche Necker (SFR Necker - UMS 3633 / US24), Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP), Plateforme Bioinformatique [SFR Necker] (BIP-D), McMaster University [Hamilton, Ontario], Department of Mathematics [Vancouver] (UBC Mathematics), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Male, 0301 basic medicine, MESH: Signal Transduction, MESH: Continental Population Groups, medicine.disease_cause, 0302 clinical medicine, MESH: Child, Intellectual disability, Genetics(clinical), MESH: Genetic Variation, Child, Genetics (clinical), Genetics, Mutation, Kinase, TOR Serine-Threonine Kinases, Phenotype, Hypotonia, Child, Preschool, Muscle Hypotonia, Female, Signal transduction, medicine.symptom, Signal Transduction, medicine.medical_specialty, MESH: Mutation, Protein Serine-Threonine Kinases, Biology, MESH: Protein-Serine-Threonine Kinases, MESH: Intellectual Disability, 03 medical and health sciences, Atrophy, Intellectual Disability, Report, Internal medicine, medicine, Humans, Alleles, PI3K/AKT/mTOR pathway, MESH: TOR Serine-Threonine Kinases, MESH: Humans, MESH: Muscle Hypotonia, MESH: Alleles, Racial Groups, MESH: Child, Preschool, Genetic Variation, medicine.disease, MESH: Male, 030104 developmental biology, Endocrinology, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, MESH: Female, 030217 neurology & neurosurgery
Abstract

International audience; Through an international multi-center collaboration, 13 individuals from nine unrelated families and affected by likely pathogenic biallelic variants in TBC1-domain-containing kinase (TBCK) were identified through whole-exome sequencing. All affected individuals were found to share a core phenotype of intellectual disability and hypotonia, and many had seizures and showed brain atrophy and white-matter changes on neuroimaging. Minor non-specific facial dysmorphism was also noted in some individuals, including multiple older children who developed coarse features similar to those of storage disorders. TBCK has been shown to regulate the mammalian target of rapamycin (mTOR) signaling pathway, which is also stimulated by exogenous leucine supplementation. TBCK was absent in cells from affected individuals, and decreased phosphorylation of phospho-ribosomal protein S6 was also observed, a finding suggestive of downregulation of mTOR signaling. Lastly, we demonstrated that activation of the mTOR pathway in response to L-leucine supplementation was retained, suggesting a possible avenue for directed therapies for this condition.

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