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12 results on '"Pediatric Neurology and Neuromuscular Diseases Unit"'

1. Rare coding variants in genes encoding GABAA receptors in genetic generalised epilepsies: an exome-based case-control study

Author

Patrick May, Simon Girard, Merle Harrer, Dheeraj R Bobbili, Julian Schubert, Stefan Wolking, Felicitas Becker, Pamela Lachance-Touchette, Caroline Meloche, Micheline Gravel, Cristina E Niturad, Julia Knaus, Carolien De Kovel, Mohamad Toliat, Anne Polvi, Michele Iacomino, Rosa Guerrero-López, Stéphanie Baulac, Carla Marini, Holger Thiele, Janine Altmüller, Kamel Jabbari, Ann-Kathrin Ruppert, Wiktor Jurkowski, Dennis Lal, Raffaella Rusconi, Sandrine Cestèle, Benedetta Terragni, Ian D Coombs, Christopher A Reid, Pasquale Striano, Hande Caglayan, Auli Siren, Kate Everett, Rikke S Møller, Helle Hjalgrim, Hiltrud Muhle, Ingo Helbig, Wolfram S Kunz, Yvonne G Weber, Sarah Weckhuysen, Peter De Jonghe, Sanjay M Sisodiya, Rima Nabbout, Silvana Franceschetti, Antonietta Coppola, Maria S Vari, Dorothée Kasteleijn-Nolst Trenité, Betul Baykan, Ugur Ozbek, Nerses Bebek, Karl M Klein, Felix Rosenow, Dang K Nguyen, François Dubeau, Lionel Carmant, Anne Lortie, Richard Desbiens, Jean-François Clément, Cécile Cieuta-Walti, Graeme J Sills, Pauls Auce, Ben Francis, Michael R Johnson, Anthony G Marson, Bianca Berghuis, Josemir W Sander, Andreja Avbersek, Mark McCormack, Gianpiero L Cavalleri, Norman Delanty, Chantal Depondt, Martin Krenn, Fritz Zimprich, Sarah Peter, Marina Nikanorova, Robert Kraaij, Jeroen van Rooij, Rudi Balling, M Arfan Ikram, André G Uitterlinden, Giuliano Avanzini, Stephanie Schorge, Steven Petrou, Massimo Mantegazza, Thomas Sander, Eric LeGuern, Jose M Serratosa, Bobby P C Koeleman, Aarno Palotie, Anna-Elina Lehesjoki, Michael Nothnagel, Peter Nürnberg, Snezana Maljevic, Federico Zara, Patrick Cossette, Roland Krause, Holger Lerche, Edoardo Ferlazzo, Carlo di Bonaventura, Angela La Neve, Paolo Tinuper, Francesca Bisulli, Aglaia Vignoli, Giuseppe Capovilla, Giovanni Crichiutti, Antonio Gambardella, Vincenzo Belcastro, Amedeo Bianchi, Destina Yalçın, Gulsen Dizdarer, Kezban Arslan, Zuhal Yapıcı, Demet Kuşcu, Costin Leu, Kristin Heggeli, Joseph Willis, Sarah R Langley, Andrea Jorgensen, Prashant Srivastava, Sarah Rau, Christian Hengsbach, Anja C.M. Sonsma, Université Côte d'Azur, CNRS, UMR 7275, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, Erasmus University Medical Center [Rotterdam] (Erasmus MC), Laboratory of Molecular Genetics of Stem Cells [University of Montreal], University of Montreal-Institut de Recherche en Immunologie et en Cancérologie [UdeM-Montréal] (IRIC), Université de Montréal (UdeM)-Université de Montréal (UdeM), University of Tübingen, University Medical Center [Utrecht], Universita degli studi di Genova, Centre de Recherche de l'Institut du Cerveau et de la Moelle épinière (CRICM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), A.Meyer Children's Hospital, Max Planck Institute for Plant Breeding Research (MPIPZ), Génomique métabolique (UMR 8030), Genoscope - Centre national de séquençage [Evry] (GENOSCOPE), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS), University of Cologne, The Genome Analysis Centre (TGAC), Cologne Center for Genomics, Institut de pharmacologie moléculaire et cellulaire (IPMC), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Ingénierie des protéines (IP), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Department of Neurophysiopathology, Besta Neurological Institute, University of Southern Denmark (SDU), Medical Genetics Laboratory, Children’s Hospital of Philadelphia (CHOP ), Universitätsklinikum Bonn (UKB), Antwerp University Hospital [Edegem] (UZA), University of Antwerp (UA), Department of Clinical and Experimental Epilepsy, University College of London [London] (UCL), Département de Neuropédiatrie, CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Instituco Neurologico C. Besta, Instituto Neurologico C. Besta, Medical Genetics and Pediatric Cardiology, IRCCS Ospedale Pediatrico Bambino Gesù [Roma], Département de mathématiques [Sherbrooke] (UdeS), Faculté des sciences [Sherbrooke] (UdeS), Université de Sherbrooke (UdeS)-Université de Sherbrooke (UdeS), University of Liverpool, Institute of Neurology [London], Royal College of Surgeons in Ireland (RCSI), Neurology Division, Beaumont Hospital, Dublin 9, Ireland, Beaumont Hospital, Hôpital Erasme [Bruxelles] (ULB), Faculté de Médecine [Bruxelles] (ULB), Université libre de Bruxelles (ULB)-Université libre de Bruxelles (ULB), Medizinische Universität Wien = Medical University of Vienna, Department of Epilepsy Clinic and Experimental Neurophysiology, Fondazione IRCCS Istituto Neurologico 'Carlo Besta', Broad Institute of MIT and Harvard (BROAD INSTITUTE), Harvard Medical School [Boston] (HMS)-Massachusetts Institute of Technology (MIT)-Massachusetts General Hospital [Boston], Department of Medical and Clinical Genetics [Helsinki], Haartman Institute [Helsinki], Faculty of Medecine [Helsinki], Helsingin yliopisto = Helsingfors universitet = University of Helsinki-Helsingin yliopisto = Helsingfors universitet = University of Helsinki-Faculty of Medecine [Helsinki], Helsingin yliopisto = Helsingfors universitet = University of Helsinki-Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Institute of Medical Informatics and Statistics, Pediatric Neurology and Neuromuscular Diseases Unit, Centre Hospitalier de l'Université de Montréal (CHUM), Université de Montréal (UdeM), Hertie Institute for Clinical Brain Research [Tubingen], Regional Epilepsy Center, Reggio Calabria, Agronomes et Vétérinaires Sans Frontières (AVSF), AVSF, NIHR Biomedical Research Centre [London], Guy's and St Thomas' NHS Foundation Trust-King‘s College London, Wellcome Trust, Commission of the European Communities, Imperial College Healthcare NHS Trust- BRC Funding, Internal Medicine, Epidemiology, Luxembourg Centre For Systems Biomedicine (LCSB), University of Luxembourg [Luxembourg], Università degli studi di Genova = University of Genoa (UniGe), Heart Center Leipzig, University Medical Center of Schleswig–Holstein = Universitätsklinikum Schleswig-Holstein (UKSH), Kiel University, Acibadem University Dspace, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université d'Évry-Val-d'Essonne (UEVE), Université Nice Sophia Antipolis (... - 2019) (UNS), University of Helsinki-University of Helsinki-Faculty of Medecine [Helsinki], University of Helsinki-University of Helsinki, Centre of Excellence in Complex Disease Genetics, Aarno Palotie / Principal Investigator, Institute for Molecular Medicine Finland, Medicum, Research Programme for Molecular Neurology, Research Programs Unit, Neuroscience Center, University of Helsinki, Genomics of Neurological and Neuropsychiatric Disorders, Epicure Consortium, EuroEPINOMICS COGIE Consortium, EpiPGX Consortium, May, Gabriella, Girard, S., Harrer, M., Bobbili, D. R., Schubert, J., Wolking, S., Becker, F., Lachance-Touchette, P., Meloche, C., Gravel, M., Niturad, C. E., Knaus, J., De Kovel, C., Toliat, M., Polvi, A., Iacomino, M., Guerrero-López, R., Baulac, S., Marini, C., Thiele, H., Altmüller, J., Jabbari, K., Ruppert, A. -K., Jurkowski, W., Lal, D., Rusconi, R., Cestèle, S., Terragni, B., Coombs, I. D., Reid, C. A., Striano, P., Caglayan, H., Siren, A., Everett, K., Møller, R. S., Hjalgrim, H., Muhle, H., Helbig, I., Kunz, W. S., Weber, Y. G., Weckhuysen, S., Jonghe, P. D., Sisodiya, S. M., Nabbout, R., Franceschetti, S., Coppola, A., Vari, M. S., Kasteleijn-Nolst Trenité, D., Baykan, B., Ozbek, U., Bebek, N., Klein, K. M., Rosenow, F., Nguyen, D. K., Dubeau, F., Carmant, L., Lortie, A., Desbiens, R., Clément, J. -F., Cieuta-Walti, C., Sills, G. J., Auce, P., Francis, B., Johnson, M. R., Marson, A. G., Berghuis, B., Sander, J. W., Avbersek, A., Mccormack, M., Cavalleri, G. L., Delanty, N., Depondt, C., Krenn, M., Zimprich, F., Peter, S., Nikanorova, M., Kraaij, R., van Rooij, J., Balling, R., Ikram, M. A., Uitterlinden, A. G., Avanzini, Giulio, Schorge, S., Petrou, S., Mantegazza, M., Sander, T., Leguern, E., Serratosa, J. M., Koeleman, B. P. C., Palotie, A., Lehesjoki, A. -E., Nothnagel, M., Nürnberg, P., Maljevic, S., Zara, F., Cossette, P., Krause, R., Lerche, H., De Jonghe, P., Arfan Ikram, M., Ferlazzo, E., di Bonaventura, C., La Neve, A., Tinuper, P., Bisulli, F., Vignoli, Massimo, Capovilla, G., Crichiutti, G., Gambardella, A., Belcastro, V., Bianchi, A., Yalçın, D., Dizdarer, G., Arslan, K., Yapıcı, Z., Kuşcu, D., Leu, C., Heggeli, K., Willis, J., Langley, S. R., Jorgensen, A., Srivastava, P., Rau, S., Hengsbach, C., Sonsma, A. C. M., University of Montreal-Institute for Research in Immunology and Cancer (IRIC), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université d'Évry-Val-d'Essonne (UEVE), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Département de Mathématiques, Université de Sherbrooke, Université de Sherbrooke [Sherbrooke], Hôpital Erasme (Bruxelles), May, Patrick, Girard, Simon, Harrer, Merle, Bobbili, Dheeraj R, Schubert, Julian, Wolking, Stefan, Becker, Felicita, Lachance-Touchette, Pamela, Meloche, Caroline, Gravel, Micheline, Niturad, Cristina E, Knaus, Julia, De Kovel, Carolien, Toliat, Mohamad, Polvi, Anne, Iacomino, Michele, Guerrero-López, Rosa, Baulac, Stéphanie, Marini, Carla, Thiele, Holger, Altmüller, Janine, Jabbari, Kamel, Ruppert, Ann-Kathrin, Jurkowski, Wiktor, Lal, Denni, Rusconi, Raffaella, Cestèle, Sandrine, Terragni, Benedetta, Coombs, Ian D, Reid, Christopher A, Striano, Pasquale, Caglayan, Hande, Siren, Auli, Everett, Kate, Møller, Rikke S, Hjalgrim, Helle, Muhle, Hiltrud, Helbig, Ingo, Kunz, Wolfram S, Weber, Yvonne G, Weckhuysen, Sarah, Jonghe, Peter De, Sisodiya, Sanjay M, Nabbout, Rima, Franceschetti, Silvana, Coppola, Antonietta, Vari, Maria S, Kasteleijn-Nolst Trenité, Dorothée, Baykan, Betul, Ozbek, Ugur, Bebek, Nerse, Klein, Karl M, Rosenow, Felix, Nguyen, Dang K, Dubeau, Françoi, Carmant, Lionel, Lortie, Anne, Desbiens, Richard, Clément, Jean-Françoi, Cieuta-Walti, Cécile, Sills, Graeme J, Auce, Paul, Francis, Ben, Johnson, Michael R, Marson, Anthony G, Berghuis, Bianca, Sander, Josemir W, Avbersek, Andreja, McCormack, Mark, Cavalleri, Gianpiero L., Delanty, Norman, Depondt, Chantal, Krenn, Martin, Zimprich, Fritz, Peter, Sarah, Nikanorova, Marina, Kraaij, Robert, van Rooij, Jeroen, Balling, Rudi, Ikram, M Arfan, Uitterlinden, André G, Avanzini, Giuliano, Schorge, Stephanie, Petrou, Steven, Mantegazza, Massimo, Sander, Thoma, LeGuern, Eric, Serratosa, Jose M, Koeleman, Bobby P C, Palotie, Aarno, Lehesjoki, Anna-Elina, Nothnagel, Michael, Nürnberg, Peter, Maljevic, Snezana, Zara, Federico, Cossette, Patrick, Krause, Roland, Lerche, Holger, De Jonghe, Peter, Ferlazzo, Edoardo, di Bonaventura, Carlo, La Neve, Angela, Tinuper, Paolo, Bisulli, Francesca, Vignoli, Aglaia, Capovilla, Giuseppe, Crichiutti, Giovanni, Gambardella, Antonio, Belcastro, Vincenzo, Bianchi, Amedeo, Yalçın, Destina, Dizdarer, Gulsen, Arslan, Kezban, Yapıcı, Zuhal, Kuşcu, Demet, Leu, Costin, Heggeli, Kristin, Willis, Joseph, Langley, Sarah R, Jorgensen, Andrea, Srivastava, Prashant, Rau, Sarah, Hengsbach, Christian, and Sonsma, Anja C.M.

Subjects
0301 basic medicine, GAMMA-2-SUBUNIT, [SDV]Life Sciences [q-bio], GABRA5, Clinical Neurology, 15Q13.3 MICRODELETIONS, ABSENCE EPILEPSY, SEQUENCE DATA, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, 3124 Neurology and psychiatry, 03 medical and health sciences, Epilepsy, 0302 clinical medicine, Genetic variation, medicine, EPILEPTIC ENCEPHALOPATHIES, Exome, Exome sequencing, ComputingMilieux_MISCELLANEOUS, Genetic association, Genetics, RISK, Science & Technology, FEBRILE SEIZURES, Neurology & Neurosurgery, biology, 3112 Neurosciences, 1103 Clinical Sciences, MOUSE MODEL, medicine.disease, ASSOCIATION ANALYSIS, 030104 developmental biology, DE-NOVO MUTATIONS, Cohort, biology.protein, Neurology (clinical), Human medicine, Neurosciences & Neurology, 1109 Neurosciences, Life Sciences & Biomedicine, 030217 neurology & neurosurgery, Cohort study
Abstract

BACKGROUND: Genetic generalised epilepsy is the most common type of inherited epilepsy. Despite a high concordance rate of 80% in monozygotic twins, the genetic background is still poorly understood. We aimed to investigate the burden of rare genetic variants in genetic generalised epilepsy.METHODS: For this exome-based case-control study, we used three different genetic generalised epilepsy case cohorts and three independent control cohorts, all of European descent. Cases included in the study were clinically evaluated for genetic generalised epilepsy. Whole-exome sequencing was done for the discovery case cohort, a validation case cohort, and two independent control cohorts. The replication case cohort underwent targeted next-generation sequencing of the 19 known genes encoding subunits of GABAA receptors and was compared to the respective GABAA receptor variants of a third independent control cohort. Functional investigations were done with automated two-microelectrode voltage clamping in Xenopus laevis oocytes.FINDINGS: Statistical comparison of 152 familial index cases with genetic generalised epilepsy in the discovery cohort to 549 ethnically matched controls suggested an enrichment of rare missense (Nonsyn) variants in the ensemble of 19 genes encoding GABAA receptors in cases (odds ratio [OR] 2·40 [95% CI 1·41-4·10]; pNonsyn=0·0014, adjusted pNonsyn=0·019). Enrichment for these genes was validated in a whole-exome sequencing cohort of 357 sporadic and familial genetic generalised epilepsy cases and 1485 independent controls (OR 1·46 [95% CI 1·05-2·03]; pNonsyn=0·0081, adjusted pNonsyn=0·016). Comparison of genes encoding GABAA receptors in the independent replication cohort of 583 familial and sporadic genetic generalised epilepsy index cases, based on candidate-gene panel sequencing, with a third independent control cohort of 635 controls confirmed the overall enrichment of rare missense variants for 15 GABAA receptor genes in cases compared with controls (OR 1·46 [95% CI 1·02-2·08]; pNonsyn=0·013, adjusted pNonsyn=0·027). Functional studies for two selected genes (GABRB2 and GABRA5) showed significant loss-of-function effects with reduced current amplitudes in four of seven tested variants compared with wild-type receptors.INTERPRETATION: Functionally relevant variants in genes encoding GABAA receptor subunits constitute a significant risk factor for genetic generalised epilepsy. Examination of the role of specific gene groups and pathways can disentangle the complex genetic architecture of genetic generalised epilepsy.FUNDING: EuroEPINOMICS (European Science Foundation through national funding organisations), Epicure and EpiPGX (Sixth Framework Programme and Seventh Framework Programme of the European Commission), Research Unit FOR2715 (German Research Foundation and Luxembourg National Research Fund).

Published
2018
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2. Genetic and phenotypic heterogeneity suggest therapeutic implications in SCN2A-related disorders

Author

Elena Gardella, Lieven Lagae, Thomas Schmitt-Mechelke, Gerhard Kluger, Nine V A M Knoers, Sandrine Mary, Marina Trivisano, Grazia M.S. Mancini, Cyril Mignot, Laila Selim, Katrine M Johannesen, Karen Markussen Linnet, Ulrike B. S. Hedrich, Maria J Miranda, Walid Fazeli, Miriam Döcker, Hannah Stamberger, Rikke S. Møller, Stéphane Auvin, Saskia Biskup, Maja Hempel, Laurence Perrin, Laurent Villard, Claudio Finetti, Ingo Helbig, Nicola Specchio, Eve Õiglane-Shlik, Holger Lerche, Peter De Jonghe, John F Mantovani, Daniel H. Arndt, Helle Hjalgrim, Dinesh V Jillella, Ingeborg Krägeloh-Mann, Pasquale Striano, Sarah Weckhuysen, Silvia Masnada, Marie Deprez, G. Christoph Korenke, Elena Fontana, Ute Moog, Jess G. Thoene, Kristen Park, Thomas Bast, Reinhard Brückner, Rudy Van Coster, Beverly Wical, Sandra Chantot-Bastaraud, Damien Lederer, Eva H. Brilstra, Gaetan Lesca, Markus Wolff, Joerg Klepper, Diane Doummar, Robertino Dilena, Kees P.J. Braun, Nienke E. Verbeek, Alexandra Afenjar, Mathieu Milh, Oliver Maier, Perrine Charles, Marion Gérard, Katia Hardies, Emmanuel Scalais, Joachim Pietz, Federico Zara, Marjan J. A. van Kempen, Guido Rubboli, Hiltrud Muhle, Caroline Lardennois, Günther Golla, Johannes R. Lemke, Thomas Dorn, Berten Ceulemans, Gerhard Kurlemann, Tobias Loddenkemper, Nicolas Deconinck, Lily C. Wong-Kisiel, Friedrich A. M. Baumeister, Niklas Schwarz, Katherine L. Helbig, Konstanze Hörtnagel, Marina Nikanorova, Caroline Nava, Dorothée Ville, Clinical Genetics, Génétique Médicale et Génomique Fonctionnelle (GMGF), Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)- Hôpital de la Timone [CHU - APHM] (TIMONE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Epilepsie et ischémie cérébrale, Université de la Méditerranée - Aix-Marseille 2-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), CHU Pitié-Salpêtrière [AP-HP], Unité fonctionnelle de génétique clinique, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Robert Debré-Université Paris Diderot - Paris 7 (UPD7), 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), 'Personal Protection Against Vectors' working group (PPAV), PPAV working group, Institute of Human Genetics, Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), University Medical Center [Utrecht], CeGaT GmbH, Epilepsy Center Kork, Epilepsy Center Kork = Epilepsiezentrum Kork, Pediatric Neurology and Neuromuscular Diseases Unit, Università degli studi di Genova = University of Genoa (UniGe), F. Hoffmann-La Roche [Basel], Perinatal Epidemiology Research Unit, Department of Pediatrics, Aarhus University Hospital, Human Genetics Institute, Heidelberg University, Institut de Pathologie et Génétique [Gosselies] (I.P.G.), Department of Pediatrics, Ghent University Hospital, Department of Pediatric Neurology, University of Leuven Medical School, University Hospitals KULeuven, Medical Genetics Laboratory, University of Calgary, Department of Molecular and Developmental Genetics (VIB11), Flanders institute of biotechnology, Antwerp University Hospital [Edegem] (UZA), Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute (ICM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Department of Paediatric Neurology and Developmental Medicine, University Children's Hospital, Children’s Hospital of Philadelphia (CHOP ), Epilepsy Center for Children and Adolescents, Ambry Genetics. intramural funds of the University of Kiel, grant from the German Research Foundation (HE5415/3-1) within the EuroEPINOMICS framework of the European Science Foundation, the German Research Foundation (DFG,HE5415/5-1, HE 5415/6-1), German Ministry for Education and Research (01DH12033, MAR 10/012), grant by the German chapter of the International League Against Epilepsy (DGfE). the EU FP7 project EpiPGX (279062), the EuroEPINOMICS framework of the European Science Foundation (DFG grant Le1030/11-2), by the German Ministry for Education and Research (BMBF) rare disease network IonNeurONet (01GM1105A), the German chapter of the International League Against Epilepsy (DGfE) the foundation 'no epilep'. ESF/Euro-Epinomics (GA136.11.N and FWO/ESF-ECRP). the Fund for Scientific Research Flanders (1125416N), Institut National de la Santé et de la Recherche Médicale (INSERM)-Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)- Hôpital de la Timone [CHU - APHM] (TIMONE)-Centre National de la Recherche Scientifique (CNRS), Service de Génétique Cytogénétique et Embryologie [CHU Pitié-Salpêtrière], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Universita degli studi di Genova, Université Paris Diderot - Paris 7 (UPD7)-Hôpital Robert Debré-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), and Villard, Laurent

Subjects
0301 basic medicine, Male, Pediatrics, Ohtahara syndrome, INTELLECTUAL DISABILITY, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Denmark, Pharmacology, Neurodevelopmental Disorders/genetics, Epilepsy, 0302 clinical medicine, Sodium channel blocker, Age of Onset, Child, NAV1.2 Voltage-Gated Sodium Channel, NAV1.2 Voltage-Gated Sodium Channel/genetics, SCN2A MUTATION, West Syndrome, 3. Good health, Phenotype, Child, Preschool, Female, medicine.symptom, Sodium Channel Blockers, Adult, medicine.medical_specialty, Adolescent, MIGRATING FOCAL SEIZURES, ONSET EPISODIC ATAXIA, Late onset, Status epilepticus, [SDV.GEN.GH] Life Sciences [q-bio]/Genetics/Human genetics, Biology, epilepsy, epilepsy genetics, SCN2A, sodium channel blockers, treatment response, 03 medical and health sciences, Young Adult, MISSENSE MUTATION, Journal Article, medicine, Humans, Preschool, NEONATAL-INFANTILE SEIZURES, EPILEPTIC ENCEPHALOPATHY, Genetic heterogeneity, AUTISM SPECTRUM DISORDER, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Infant, SODIUM-CHANNEL, medicine.disease, Denmark/epidemiology, 030104 developmental biology, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, DE-NOVO MUTATIONS, Neurodevelopmental Disorders, Mutation, Sodium Channel Blockers/therapeutic use, Human medicine, Neurology (clinical), Age of onset, Epilepsy/drug therapy, 030217 neurology & neurosurgery
Abstract

International audience; Mutations in SCN2A, a gene encoding the voltage-gated sodium channel Nav1.2, have been associated with a spectrum of epilepsies and neurodevelopmental disorders. Here, we report the phenotypes of 71 patients and review 130 previously reported patients. We found that (i) encephalopathies with infantile/childhood onset epilepsies (≥3 months of age) occur almost as often as those with an early infantile onset (

Published
2017
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3. TBC1D24 regulates neuronal migration and maturation through modulation of the ARF6-dependent pathway

Author

Antonio Falace, Carlos Cardoso, Françoise Watrin, Federico Zara, Fabio Benfenati, Manuela Fadda, Alfonso Represa, Emmanuelle Buhler, Pietro Baldelli, Anna Fassio, Pellegrino Lippiello, Emilie Pallesi-Pocachard, Institut de Biologie du Développement de Marseille (IBDM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Institut de Neurobiologie de la Méditerranée [Aix-Marseille Université] (INMED - INSERM U901), Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Istituto Italiano di Tecnologia (IIT), Pediatric Neurology and Neuromuscular Diseases Unit, Universita degli studi di Genova, Epilepsie et ischémie cérébrale, Université de la Méditerranée - Aix-Marseille 2-Institut National de la Santé et de la Recherche Médicale (INSERM), University of Genova, and Università degli studi di Genova = University of Genoa (UniGe)

Subjects
ADP ribosylation factor, [SDV]Life Sciences [q-bio], [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Synaptogenesis, Glutamic Acid, Nerve Tissue Proteins, Biology, Cell Movement, In vivo, RNA interference, medicine, Gene Knockdown Techniques, Animals, Small GTPase, 10. No inequality, Cells, Cultured, ComputingMilieux_MISCELLANEOUS, Neurons, Gene knockdown, Multidisciplinary, Neocortex, ADP-Ribosylation Factors, GTPase-Activating Proteins, Brain, Membrane Proteins, Dendrites, Biological Sciences, Rats, Cell biology, medicine.anatomical_structure, nervous system, ADP-Ribosylation Factor 6, Synapses, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Carrier Proteins, Neuroscience
Abstract

Alterations in the formation of brain networks are associated with several neurodevelopmental disorders. Mutations in TBC1 domain family member 24 (TBC1D24) are responsible for syndromes that combine cortical malformations, intellectual disability, and epilepsy, but the function of TBC1D24 in the brain remains unknown. We report here that in utero TBC1D24 knockdown in the rat developing neocortex affects the multipolar-bipolar transition of neurons leading to delayed radial migration. Furthermore, we find that TBC1D24-knockdown neurons display an abnormal maturation and retain immature morphofunctional properties. TBC1D24 interacts with ADP ribosylation factor (ARF)6, a small GTPase crucial for membrane trafficking. We show that in vivo, overexpression of the dominant-negative form of ARF6 rescues the neuronal migration and dendritic outgrowth defects induced by TBC1D24 knockdown, suggesting that TBC1D24 prevents ARF6 activation. Overall, our findings demonstrate an essential role of TBC1D24 in neuronal migration and maturation and highlight the physiological relevance of the ARF6-dependent membrane-trafficking pathway in brain development.

Published
2014
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4. Loss-of-function KCNH2 mutation in a family with long QT syndrome, epilepsy, and sudden death

Author

Cestèle, Sandrine, Partemi, Sara, Cestele, Sandrine, Pezzella, Marianna, Campuzano, Oscar, Paravidino, Roberta, Pascali, Vincenzo, Zara, Federico, Tassinari, Carlo Alberto, Striano, Salvatore, Oliva, Antonio, Brugada, Ramon, Mantegazza, Massimo, Striano, Pasquale, Université Côte d'Azur, CNRS, UMR 7275, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, Institute of Legal Medicine, Catholic University, Ingénierie des protéines (IP), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Pediatric Neurology and Neuromuscular Diseases Unit, Universita degli studi di Genova, Cardiovascular Genetics Center, Universitat de Girona (UdG), Institute G. Gaslini, Department of Neurological Sciences, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Epilepsy Center, Università degli studi di Napoli Federico II, departament de Quimica, Universitat Autònoma de Barcelona (UAB), Department of Neurophysiopathology, Besta Neurological Institute, Partemi, S, Cest?le, S, Pezzella, M, Campuzano, O, Paravidino, R, Pascali, Vl, Zara, F, Tassinari, Ca, Striano, Salvatore, Oliva, A, Brugada, R, Mantegazza, M, Striano, Pasquale, Institut de pharmacologie moléculaire et cellulaire (IPMC), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), IRCCS, Università degli studi di Genova = University of Genoa (UniGe), and University of Naples Federico II = Università degli studi di Napoli Federico II

Subjects
ERG1 Potassium Channel, Patch-Clamp Techniques, [SDV]Life Sciences [q-bio], DNA Mutational Analysis, Twins, 030204 cardiovascular system & hematology, Membrane Potentials, Epilepsy, Death, Sudden, Electrocardiography, 0302 clinical medicine, Channelopathy, Twins, Dizygotic, KCNH2, ComputingMilieux_MISCELLANEOUS, Cell Line, Transformed, medicine.diagnostic_test, Sudden death, Death, Long QT Syndrome, Neurology, Mutation (genetic algorithm), Cardiology, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Female, congenital, hereditary, and neonatal diseases and abnormalities, medicine.medical_specialty, Adolescent, Long QT syndrome, Transfection, Biophysical Phenomena, Cell Line, 03 medical and health sciences, Bacterial Proteins, Internal medicine, medicine, Dizygotic, Humans, Point Mutation, cardiovascular diseases, Loss function, Family Health, business.industry, Point mutation, Settore MED/43 - MEDICINA LEGALE, medicine.disease, Sudden, Electric Stimulation, Ether-A-Go-Go Potassium Channels, Luminescent Proteins, Endocrinology, Transformed, Neurology (clinical), business, 030217 neurology & neurosurgery
Abstract

International audience; There has been increased interest in a possible association between epilepsy channelopathies and cardiac arrhythmias, such as long QT syndrome (LQTS). We report a kindred that features LQTS, idiopathic epilepsy, and increased risk of sudden death. Genetic study showed a previously unreported heterozygous point mutation (c.246T>C) in the KCNH2 gene. Functional studies showed that the mutation induces severe loss of function. This observation provides further evidence for a possible link between idiopathic epilepsy and LQTS.

Published
2013
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5. Spastic paraplegia with thin corpus callosum: description of 20 new families, refinement of the SPG11 locus, candidate gene analysis and evidence of genetic heterogeneity

Author

Giovanni, Stevanin, Giorgia, Montagna, Hamid, Azzedine, Enza Maria Valente, Alexandra, Durr, Valentina, Scarano, Naima, Bouslam, Denise, Cassandrini, Denora, Paola S., Chiara, Criscuolo, Soraya, Belarbi, Antonio, Orlacchio, Philippe, Jonveaux, Gabriella, Silvestri, Anne Marie Ouvrad Hernandez, De Michele, G., Meriem, Tazir, Caterina, Mariotti, Knut, Brockmann, Alessandro, Malandrini, Van Der Knapp, M. S., Marcella, Neri, Hassan, Tonekaboni, Melone, Mariarosa A. B., Alessandra, Tessa, Teresa Dotti, M., Michela, Tosetti, Pauri, Flavia, Antonio, Federico, Casali, Carlo, Cruz, Vitor T., Loureiro, Jose L., Federico, Zara, Sylvie, Forlani, Enrico, Bertini, Paula, Coutinho, Alessandro, Filla, Alexis, Brice, Santorelli, Filippo M., Casali, C., Neurologie et thérapeutique expérimentale, Université Pierre et Marie Curie - Paris 6 (UPMC)-IFR70-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Unit of Molecular Medicine, IRCCS, Mendel Institute, Department of Neurological Sciences, University of Naples Federico II = Università degli studi di Napoli Federico II, Pediatric Neurology and Neuromuscular Diseases Unit, Università degli studi di Genova = University of Genoa (UniGe), Service de Neurologie, Hopital Mustapha, Department of Neurosciences, Università degli Studi di Roma Tor Vergata [Roma], Service de Génétique [CHRU Nancy], Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Department of Neuroscience, Catholic University, Département de neurologie, Université Joseph Fourier - Grenoble 1 (UJF)-CHU Grenoble, Besta Neurological Institute, Department of Pediatrics and Neuropediatrics, Georg-August-University = Georg-August-Universität Göttingen, Institute of Neurological Sciences, Department of Child Neurology, VU University Medical Center [Amsterdam], Medical Genetics, Università degli Studi di Ferrara = University of Ferrara (UniFE), Stella Maris, Department of Neurology and ORL, Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Departamento de Neurologia, Hospital S. Sebastiao, ANR-05-MRAR-0001,Cav3pathies,Approches physiopathologique et moléculaire de la signalisation calcique dans les caveolinopathies musculaires(2005), Stevanin, G, Montagna, G, Azzedine, H, Valente, Em, Durr, A, Scarano, V, Bouslam, N, Cassandrini, D, Denora, P, Criscuolo, C, Belarbi, S, Orlacchio, A, Jonveaux, P, Silvestri, G, Hernandez, Am, DE MICHELE, G, Tazir, M, Mariotti, C, Brockmann, K, Malandrini, A, VAN DER KNAPP, M, Neri, M, Tonekaboni, H, Melone, Mariarosa Anna Beatrice, Tessa, A, Dotti, Mt, Tosetti, M, Pauri, F, Federico, A, Casali, C, Cruz, Vt, Loureiro, Jl, Zara, F, Forlani, S, Bertini, E, Coutinho, P, Filla, A, Brice, A, Santorelli, Fm, Pediatric surgery, Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR70-Université Pierre et Marie Curie - Paris 6 (UPMC), Service de Génétique Cytogénétique et Embryologie [CHU Pitié-Salpêtrière], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Università degli studi di Napoli Federico II, Universita degli studi di Genova, Georg-August-University [Göttingen], Università degli Studi di Ferrara (UniFE), University of Naples Federico II, and Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]

Subjects
Male, Candidate gene, Genetic Linkage, Corpus Callosum, Consanguinity, Autosomal recessive hereditary spastic, Genetic heterogeneity, 0302 clinical medicine, MESH: Child, Spastic Paraplegia, Autosomal recessive hereditary spastic paraplegia, Linkage, SPG11, Thin corpus callosum, Adolescent, Child, Child, Preschool, Chromosomes, Human, Pair 15, Female, Humans, Infant, Lod Score, Pedigree, Phenotype, Spastic Paraplegia, Hereditary, Genes, Recessive, Genetic Heterogeneity, Genetics, Genetics (clinical), Cellular and Molecular Neuroscience, 0303 health sciences, MESH: Spastic Paraplegia, Hereditary, MESH: Genetic Heterogeneity, MESH: Infant, autosomal recessive hereditary spastic paraplegia, genetic heterogeneity, linkage, spg11, thin corpus callosum, Hereditary, Settore MED/26 - Neurologia, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Human, Hereditary spastic paraplegia, MESH: Pedigree, Locus (genetics), Biology, MESH: Phenotype, MESH: Corpus Callosum, Chromosomes, 03 medical and health sciences, Gene mapping, Genetic linkage, medicine, Recessive, Preschool, MESH: Genes, Recessive, 030304 developmental biology, MESH: Adolescent, MESH: Consanguinity, Autosome, MESH: Humans, Thin corpus callosum, SPG11, Linkage, Haplotype, MESH: Child, Preschool, Pair 15, medicine.disease, MESH: Male, Genes, MESH: Lod Score, MESH: Linkage (Genetics), MESH: Female, 030217 neurology & neurosurgery, MESH: Chromosomes, Human, Pair 15
Abstract

We studied 20 Mediterranean families (40 patients) with autosomal recessive hereditary spastic paraplegia and thin corpus callosum (ARHSP-TCC, MIM 604360) to characterize their clinical and genetic features. In six families (17 patients) of Algerian Italian, Moroccan, and Portuguese ancestry, we found data consistent with linkage to the SPG11 locus on chromosome 15q13-15, whereas, in four families (nine patients of Italian, French, and Portuguese ancestry) linkage to the SPG11 locus could firmly be excluded, reinforcing the notion that ARHSP-TCC is genetically heterogeneous. Patients from linked and unlinked families could not be distinguished on the basis of clinical features alone. In SPG11-linked kindred, haplotype reconstruction allowed significant refinement to 6 cM, of the minimal chromosomal interval, but analysis of two genes (MAP1A and SEMA6D) in this region did not identify causative mutations. Our findings suggest that ARHSP-TCC is the most frequent form of ARHSP in Mediterranean countries and that it is particularly frequent in Italy.

Published
2006
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6. Role of Human Milk Microbiota in Infant Neurodevelopment: Mechanisms and Clinical Implications.

Author

Biagioli V, Sortino V, Falsaperla R, and Striano P

Abstract

Background: Human milk (HM) is recognized as an ideal source of nutrition for newborns; as a result, its multiple bioactive molecules can support the growth of healthy newborns and reduce the risk of mortality and diseases such as asthma, respiratory infections, diabetes (type 1 and 2), and gastrointestinal disorders such as ulcerative colitis and Crohn's disease. Furthermore, it can reduce the severity of necrotizing enterocolitis (NEC) in preterm infants. Moreover, human milk oligosaccharides (HMOs) present in breast milk show an immunomodulatory, prebiotic, and neurodevelopmental effect that supports the microbiota-gut-brain axis., Material and Methods: This study examined the state-of-the-art research, using keywords such as "breastfeeding", "human milk oligosaccharides", "microbiota-gut-brain axis", "infants", and "malnutrition". The literature review was conducted by selecting articles between 2013 and 2024, as the most recent ones. The databases used were Web Science, PubMed, and Scopus., Results: We found multiple studies examining the composition of HM and infant formula (IF). However, further longitudinal studies and randomized control trials (RCTs) are needed to better understand the clinical outcomes that bioactive components exert on healthy and hospitalized children and how, in conditions of malnutrition, it is necessary to support the growth of the newborn., Conclusions: In this review, we affirm the importance of human milk and, through it, the modulation of the microbiota and the neuroprotective role in newborns, determining the health of the following years of life., Competing Interests: The authors declare no conflicts of interest.

Published
2024
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7. Etiological involvement of KCND1 variants in an X-linked neurodevelopmental disorder with variable expressivity.

Author

Kalm T, Schob C, Völler H, Gardeitchik T, Gilissen C, Pfundt R, Klöckner C, Platzer K, Klabunde-Cherwon A, Ries M, Syrbe S, Beccaria F, Madia F, Scala M, Zara F, Hofstede F, Simon MEH, van Jaarsveld RH, Oegema R, van Gassen KLI, Holwerda SJB, Barakat TS, Bouman A, van Slegtenhorst M, Álvarez S, Fernández-Jaén A, Porta J, Accogli A, Mancardi MM, Striano P, Iacomino M, Chae JH, Jang S, Kim SY, Chitayat D, Mercimek-Andrews S, Depienne C, Kampmeier A, Kuechler A, Surowy H, Bertini ES, Radio FC, Mancini C, Pizzi S, Tartaglia M, Gauthier L, Genevieve D, Tharreau M, Azoulay N, Zaks-Hoffer G, Gilad NK, Orenstein N, Bernard G, Thiffault I, Denecke J, Herget T, Kortüm F, Kubisch C, Bähring R, and Kindler S

Subjects
Adolescent, Adult, Child, Child, Preschool, Female, Humans, Infant, Male, Epilepsy genetics, Exome Sequencing, Genetic Diseases, X-Linked genetics, Heterozygote, Mutation, Missense genetics, Pedigree, Phenotype, Shal Potassium Channels genetics, Neurodevelopmental Disorders genetics
Abstract

Utilizing trio whole-exome sequencing and a gene matching approach, we identified a cohort of 18 male individuals from 17 families with hemizygous variants in KCND1, including two de novo missense variants, three maternally inherited protein-truncating variants, and 12 maternally inherited missense variants. Affected subjects present with a neurodevelopmental disorder characterized by diverse neurological abnormalities, mostly delays in different developmental domains, but also distinct neuropsychiatric signs and epilepsy. Heterozygous carrier mothers are clinically unaffected. KCND1 encodes the α-subunit of Kv4.1 voltage-gated potassium channels. All variant-associated amino acid substitutions affect either the cytoplasmic N- or C-terminus of the channel protein except for two occurring in transmembrane segments 1 and 4. Kv4.1 channels were functionally characterized in the absence and presence of auxiliary β subunits. Variant-specific alterations of biophysical channel properties were diverse and varied in magnitude. Genetic data analysis in combination with our functional assessment shows that Kv4.1 channel dysfunction is involved in the pathogenesis of an X-linked neurodevelopmental disorder frequently associated with a variable neuropsychiatric clinical phenotype., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)

Published
2024
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8. Diagnostic Approach to Macrocephaly in Children.

Author

Accogli A, Geraldo AF, Piccolo G, Riva A, Scala M, Balagura G, Salpietro V, Madia F, Maghnie M, Zara F, Striano P, Tortora D, Severino M, and Capra V

Abstract

Macrocephaly affects up to 5% of the pediatric population and is defined as an abnormally large head with an occipitofrontal circumference (OFC) >2 standard deviations (SD) above the mean for a given age and sex. Taking into account that about 2-3% of the healthy population has an OFC between 2 and 3 SD, macrocephaly is considered as "clinically relevant" when OFC is above 3 SD. This implies the urgent need for a diagnostic workflow to use in the clinical setting to dissect the several causes of increased OFC, from the benign form of familial macrocephaly and the Benign enlargement of subarachnoid spaces (BESS) to many pathological conditions, including genetic disorders. Moreover, macrocephaly should be differentiated by megalencephaly (MEG), which refers exclusively to brain overgrowth, exceeding twice the SD (3SD-"clinically relevant" megalencephaly). While macrocephaly can be isolated and benign or may be the first indication of an underlying congenital, genetic, or acquired disorder, megalencephaly is most likely due to a genetic cause. Apart from the head size evaluation, a detailed family and personal history, neuroimaging, and a careful clinical evaluation are crucial to reach the correct diagnosis. In this review, we seek to underline the clinical aspects of macrocephaly and megalencephaly, emphasizing the main differential diagnosis with a major focus on common genetic disorders. We thus provide a clinico-radiological algorithm to guide pediatricians in the assessment of children with macrocephaly., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Accogli, Geraldo, Piccolo, Riva, Scala, Balagura, Salpietro, Madia, Maghnie, Zara, Striano, Tortora, Severino and Capra.)

Published
2022
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9. Biallelic variants in HPDL cause pure and complicated hereditary spastic paraplegia.

Author

Wiessner M, Maroofian R, Ni MY, Pedroni A, Müller JS, Stucka R, Beetz C, Efthymiou S, Santorelli FM, Alfares AA, Zhu C, Uhrova Meszarosova A, Alehabib E, Bakhtiari S, Janecke AR, Otero MG, Chen JYH, Peterson JT, Strom TM, De Jonghe P, Deconinck T, De Ridder W, De Winter J, Pasquariello R, Ricca I, Alfadhel M, van de Warrenburg BP, Portier R, Bergmann C, Ghasemi Firouzabadi S, Jin SC, Bilguvar K, Hamed S, Abdelhameed M, Haridy NA, Maqbool S, Rahman F, Anwar N, Carmichael J, Pagnamenta A, Wood NW, Tran Mau-Them F, Haack T, Di Rocco M, Ceccherini I, Iacomino M, Zara F, Salpietro V, Scala M, Rusmini M, Xu Y, Wang Y, Suzuki Y, Koh K, Nan H, Ishiura H, Tsuji S, Lambert L, Schmitt E, Lacaze E, Küpper H, Dredge D, Skraban C, Goldstein A, Willis MJH, Grand K, Graham JM, Lewis RA, Millan F, Duman Ö, Dündar N, Uyanik G, Schöls L, Nürnberg P, Nürnberg G, Catala Bordes A, Seeman P, Kuchar M, Darvish H, Rebelo A, Bouçanova F, Medard JJ, Chrast R, Auer-Grumbach M, Alkuraya FS, Shamseldin H, Al Tala S, Rezazadeh Varaghchi J, Najafi M, Deschner S, Gläser D, Hüttel W, Kruer MC, Kamsteeg EJ, Takiyama Y, Züchner S, Baets J, Synofzik M, Schüle R, Horvath R, Houlden H, Bartesaghi L, Lee HJ, Ampatzis K, Pierson TM, and Senderek J

Subjects
Animals, Female, Humans, Male, Mice, Mutation, Pedigree, Rats, Zebrafish, Oxygenases genetics, Spastic Paraplegia, Hereditary genetics
Abstract

Human 4-hydroxyphenylpyruvate dioxygenase-like (HPDL) is a putative iron-containing non-heme oxygenase of unknown specificity and biological significance. We report 25 families containing 34 individuals with neurological disease associated with biallelic HPDL variants. Phenotypes ranged from juvenile-onset pure hereditary spastic paraplegia to infantile-onset spasticity and global developmental delays, sometimes complicated by episodes of neurological and respiratory decompensation. Variants included bona fide pathogenic truncating changes, although most were missense substitutions. Functionality of variants could not be determined directly as the enzymatic specificity of HPDL is unknown; however, when HPDL missense substitutions were introduced into 4-hydroxyphenylpyruvate dioxygenase (HPPD, an HPDL orthologue), they impaired the ability of HPPD to convert 4-hydroxyphenylpyruvate into homogentisate. Moreover, three additional sets of experiments provided evidence for a role of HPDL in the nervous system and further supported its link to neurological disease: (i) HPDL was expressed in the nervous system and expression increased during neural differentiation; (ii) knockdown of zebrafish hpdl led to abnormal motor behaviour, replicating aspects of the human disease; and (iii) HPDL localized to mitochondria, consistent with mitochondrial disease that is often associated with neurological manifestations. Our findings suggest that biallelic HPDL variants cause a syndrome varying from juvenile-onset pure hereditary spastic paraplegia to infantile-onset spastic tetraplegia associated with global developmental delays., (© The Author(s) (2021). Published by Oxford University Press on behalf of the Guarantors of Brain. All rights reserved. For permissions, please email: journals.permissions@oup.com.)

Published
2021
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10. RNF213 variant in a patient with Legius syndrome associated with moyamoya syndrome.

Author

Romanisio G, Chelleri C, Scala M, Piccolo G, Carlini B, Gatti L, Capra V, Zara F, Bersano A, Pavanello M, De Marco P, and Diana MC

Subjects
Cafe-au-Lait Spots pathology, Female, Frameshift Mutation, Humans, Moyamoya Disease pathology, Syndrome, Young Adult, Adenosine Triphosphatases genetics, Cafe-au-Lait Spots genetics, Moyamoya Disease genetics, Ubiquitin-Protein Ligases genetics
Published
2021
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11. Genetic investigation of sudden unexpected death in epilepsy cohort by panel target resequencing.

Author

Coll M, Allegue C, Partemi S, Mates J, Del Olmo B, Campuzano O, Pascali V, Iglesias A, Striano P, Oliva A, and Brugada R

Subjects
Adolescent, Adult, Aged, Calcium-Binding Proteins genetics, Female, Fibrillin-1 genetics, Forensic Genetics, Genetic Variation, Humans, Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels genetics, KCNQ1 Potassium Channel genetics, Male, Middle Aged, NAV1.1 Voltage-Gated Sodium Channel genetics, NAV1.4 Voltage-Gated Sodium Channel genetics, Pedigree, Potassium Channels genetics, Young Adult, Death, Sudden etiology, Epilepsy genetics, High-Throughput Nucleotide Sequencing methods
Abstract

Sudden unexpected death in epilepsy (SUDEP) is defined as the abrupt, no traumatic, witnessed or unwitnessed death, occurring in benign circumstances, in an individual with epilepsy, with or without evidence for a seizure and excluding documented status epilepticus (seizure duration ≥ 30 min or seizures without recovery), and in which postmortem examination does not reveal a cause of death. Although the physiopathological mechanisms that underlie SUDEP remain to be clarified, the genetic background has been described to play a role in this disorder. Pathogenic variants in genes associated with epilepsy and encoding cardiac ion channels could explain the SUDEP phenotype. To test this we use the next-generation sequencing technology to sequence a cohort of SUDEP cases and its translation into clinical and forensic fields. A panel target resequencing was used to study 14 SUDEP cases from both postmortem (2 cases) and from living patients (12 cases). Genes already associated with SUDEP and also candidate genes had been investigated. Overall, 24 rare genetic variants were identified in 13 SUDEP cases. Four cases showed rare variants with complete segregation in the SCN1A, FBN1, HCN1, SCN4A, and EFHC1 genes, and one case with a rare variant in KCNQ1 gene showed incomplete pattern of inheritance. In four cases, rare variants were detected in CACNA1A, SCN11A and SCN10A, and KCNQ1 genes, but familial segregation was not possible due to lack of DNA from relatives. Finally, in the four remaining cases, the rare variants did not segregate in the family. This study confirms the link between epilepsy, sudden death, and cardiac disease. In addition, we identified new potential candidate genes for SUDEP: FBN1, HCN1, SCN4A, EFHC1, CACNA1A, SCN11A, and SCN10A. Further confirmation in larger cohorts will be necessary especially if genetic screening for SUDEP is applied to forensic and clinical medicine. Nevertheless, this study supports the emerging concept of a genetically determined cardiocerebral channelopathy.

Published
2016
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12. Rescuable folding defective NaV1.1 (SCN1A) mutants in epilepsy: properties, occurrence, and novel rescuing strategy with peptides targeted to the endoplasmic reticulum.

Author

Bechi G, Rusconi R, Cestèle S, Striano P, Franceschetti S, and Mantegazza M

Subjects
Blotting, Western, Cell Line, Transformed, Endoplasmic Reticulum drug effects, Escherichia coli, Humans, Immunohistochemistry, Membrane Potentials drug effects, Membrane Potentials physiology, Membrane Transport Modulators pharmacology, Models, Neurological, NAV1.1 Voltage-Gated Sodium Channel chemistry, Patch-Clamp Techniques, Protein Folding, Scorpion Venoms pharmacology, Transfection, Endoplasmic Reticulum metabolism, Epilepsy genetics, Epilepsy metabolism, Mutation, Missense, NAV1.1 Voltage-Gated Sodium Channel genetics, NAV1.1 Voltage-Gated Sodium Channel metabolism
Abstract

Mutations of the voltage gated Na(+) channel Na(V)1.1 (SCN1A) are important causes of different genetic epilepsies and can also cause familial hemiplegic migraine (FHM-III). In previous studies, some rescuable epileptogenic folding defective mutants located in domain IV of Na(V)1.1 have been identified, showing partial loss of function also with maximal rescue. Variable rescue may be one of the causes of phenotypic variability, and rescue might be exploited for therapeutic approaches. Recently, we have identified a folding defective FHM-III Na(V)1.1 mutant that showed overall gain of function when rescued, consistent with a differential pathomechanism. Here, we have evaluated functional properties and cell surface expression of six Na(V)1.1 epileptogenic missense mutations in different rescuing conditions, including a novel one that we have developed expressing a selective sodium channel toxin (CsEI) targeted to the endoplasmic reticulum (ER). All the mutants showed loss of function and reduced cell surface expression, consistently with possibility of rescue. Four of them were rescuable by incubation at low temperature and interactions with different co-expressed proteins or a pharmacological chaperone (phenytoin). Notably, CsEI was able to rescue four mutants. Thus, Na(V)1.1 folding defective mutants can be relatively common and mutations inducing rescuable folding defects are spread in all Na(V)1.1 domains. Importantly, epileptogenic mutants showed overall loss of function even upon rescue, differently than FHM-III ones. The effectiveness of CsEI demonstrates that interactions in the ER are sufficient for inducing rescue, and provides a proof of concept for developing possible therapeutic approaches that may overcome some limitations of pharmacological chaperones., (Copyright © 2015 Elsevier Inc. All rights reserved.)

Published
2015
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