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1. Delineation of a KDM2B-related neurodevelopmental disorder and its associated DNA methylation signature.

Author

Jaarsveld, R.H. van, Reilly, J., Cornips, M.C., Hadders, M.A., Agolini, E., Ahimaz, P., Anyane-Yeboa, K., Bellanger, S.A., Binsbergen, E. van, Boogaard, M.J. van den, Brischoux-Boucher, E., Caylor, R.C., Ciolfi, A., Essen, T.A. van, Fontana, P., Hopman, S., Iascone, M., Javier, M.M., Kamsteeg, E.J., Kerkhof, J., Kido, J., Kim, H.G., Kleefstra, T., Lonardo, F., Lai, A., Lev, D., Levy, M.A., Lewis, M.E.S., Lichty, A., Mannens, M.M., Matsumoto, N., Maya, I., McConkey, H., Megarbane, A., Michaud, V., Miele, E., Niceta, M., Novelli, A., Onesimo, R., Pfundt, R.P., Popp, B., Prijoles, E., Relator, R., Redon, S., Rots, D., Rouault, K., Saida, K., Schieving, J.H., Tartaglia, M., Tenconi, R., Uguen, K., Verbeek, N., Walsh, C.A., Yosovich, K., Yuskaitis, C.J., Zampino, G., Sadikovic, B., Alders, M., Oegema, R., Jaarsveld, R.H. van, Reilly, J., Cornips, M.C., Hadders, M.A., Agolini, E., Ahimaz, P., Anyane-Yeboa, K., Bellanger, S.A., Binsbergen, E. van, Boogaard, M.J. van den, Brischoux-Boucher, E., Caylor, R.C., Ciolfi, A., Essen, T.A. van, Fontana, P., Hopman, S., Iascone, M., Javier, M.M., Kamsteeg, E.J., Kerkhof, J., Kido, J., Kim, H.G., Kleefstra, T., Lonardo, F., Lai, A., Lev, D., Levy, M.A., Lewis, M.E.S., Lichty, A., Mannens, M.M., Matsumoto, N., Maya, I., McConkey, H., Megarbane, A., Michaud, V., Miele, E., Niceta, M., Novelli, A., Onesimo, R., Pfundt, R.P., Popp, B., Prijoles, E., Relator, R., Redon, S., Rots, D., Rouault, K., Saida, K., Schieving, J.H., Tartaglia, M., Tenconi, R., Uguen, K., Verbeek, N., Walsh, C.A., Yosovich, K., Yuskaitis, C.J., Zampino, G., Sadikovic, B., Alders, M., and Oegema, R.

Abstract

01 januari 2023, Item does not contain fulltext, PURPOSE: Pathogenic variants in genes involved in the epigenetic machinery are an emerging cause of neurodevelopment disorders (NDDs). Lysine-demethylase 2B (KDM2B) encodes an epigenetic regulator and mouse models suggest an important role during development. We set out to determine whether KDM2B variants are associated with NDD. METHODS: Through international collaborations, we collected data on individuals with heterozygous KDM2B variants. We applied methylation arrays on peripheral blood DNA samples to determine a KDM2B associated epigenetic signature. RESULTS: We recruited a total of 27 individuals with heterozygous variants in KDM2B. We present evidence, including a shared epigenetic signature, to support a pathogenic classification of 15 KDM2B variants and identify the CxxC domain as a mutational hotspot. Both loss-of-function and CxxC-domain missense variants present with a specific subepisignature. Moreover, the KDM2B episignature was identified in the context of a dual molecular diagnosis in multiple individuals. Our efforts resulted in a cohort of 21 individuals with heterozygous (likely) pathogenic variants. Individuals in this cohort present with developmental delay and/or intellectual disability; autism; attention deficit disorder/attention deficit hyperactivity disorder; congenital organ anomalies mainly of the heart, eyes, and urogenital system; and subtle facial dysmorphism. CONCLUSION: Pathogenic heterozygous variants in KDM2B are associated with NDD and a specific epigenetic signature detectable in peripheral blood.

Published
2023

2. The landscape of epilepsy-related GATOR1 variants (vol 21, pg 398, 2019)

Author

Baldassari, S., Picard, F., Verbeek, N.E., Kempen, M. van, Brilstra, E.H., Lesca, G., Conti, V., Guerrini, R., Bisulli, F., Licchetta, L., Pippucci, T., Tinuper, P., Hirsch, E., Saint Martin, A. de, Chelly, J., Rudolf, G., Chipaux, M., Ferrand-Sorbets, S., Dorfmuller, G., Sisodiya, S., Balestrini, S., Schoeler, N., Hernandez-Hernandez, L., Krithika, S., Oegema, R., Hagebeuk, E., Gunning, B., Deckers, C., Berghuis, B., Wegner, I., Niks, E.H., Jansen, F.E., Braun, K., Jong, D. de, Rubboli, G., Talvik, I., Sander, V., Uldall, P., Jacquemont, M.L., Nava, C., Leguern, E., Julia, S., Gambardella, A., d'Orsi, G., Crichiutti, G., Faivre, L., Darmency, V., Benova, B., Krsek, P., Biraben, A., Lebre, A.S., Jennesson, M., Sattar, S., Marchal, C., Nordli, D.R., Lindstrom, K., Striano, P., Lomax, L.B., Kiss, C., Bartolomei, F., Lepine, A.F., Schoonjans, A.S., Stouffs, K., Jansen, A., Panagiotakaki, E., Ricard-Mousnier, B., Thevenon, J., Bellescize, J. de, Catenoix, H., Dorn, T., Zenker, M., Muller-Schluter, K., Brandt, C., Krey, I., Polster, T., Wolff, M., Balci, M., Rostasy, K., Achaz, G., Zacher, P., Becher, T., Cloppenborg, T., Yuskaitis, C.J., Weckhuysen, S., Poduri, A., Lemke, J.R., Moller, R.S., and Baulac, S.

Published
2019

3. The landscape of epilepsy-related GATOR1 variants

Author

Johannes R. Lemke, Pia Zacher, Thomas Dorn, Laura Hernandez-Hernandez, Natasha E. Schoeler, Stéphanie Baulac, Sara Baldassari, Anne de Saint Martin, Eleni Panagiotakaki, Anne Fabienne Lepine, Markus Wolff, Arnaud Biraben, Renske Oegema, Edouard Hirsch, Anna Jansen, Charles Deckers, Nienke E. Verbeek, Fabienne Picard, Georg Dorfmüller, Sarah Ferrand-Sorbets, Barbora Benova, Francesca Bisulli, Inga Talvik, Kristin Lindstrom, Tilman Polster, Douglas R. Nordli, Tommaso Pippucci, Eva H. Brilstra, Shifteh Sattar, Erik H. Niks, Marie Line Jacquemont, Kees P.J. Braun, Karen Müller-Schlüter, Sanjay M. Sisodiya, Sarah Weckhuysen, Lysa Boissé Lomax, Sophie Julia, Brigitte Ricard-Mousnier, Mathilde Chipaux, Laura Licchetta, Gaetan Lesca, Bianca Berghuis, S. Krithika, Jamel Chelly, Renzo Guerrini, Hélène Catenoix, Annapurna Poduri, Melanie Jennesson, Pasquale Striano, Rikke S. Møller, Antonio Gambardella, Guillaume Achaz, Peter Uldall, Fabrice Bartolomei, Giuseppe d'Orsi, Laurence Faivre, Floor E. Jansen, An Sofie Schoonjans, Kevin Rostasy, Thomas Becher, Pavel Krsek, Julien Thevenon, Marjan J. A. van Kempen, Guido Rubboli, Cécile Marchal, Meral Balci, Boudewijn Gunning, Ilona Krey, Julitta de Bellescize, Veronique Darmency, Christopher J. Yuskaitis, Daniëlle de Jong, Giovanni Crichiutti, Paolo Tinuper, Katrien Stouffs, Valentin Sander, Anne-Sophie Lebre, Thomas Cloppenborg, Valerio Conti, Gabrielle Rudolf, Courtney Kiss, Eveline Hagebeuk, Caroline Nava, Eric LeGuern, Ilse Wegner, Christian Brandt, Martin Zenker, Simona Balestrini, Picard, Fabienne, Baldassari S., Picard F., Verbeek N.E., van Kempen M., Brilstra E.H., Lesca G., Conti V., Guerrini R., Bisulli F., Licchetta L., Pippucci T., Tinuper P., Hirsch E., de Saint Martin A., Chelly J., Rudolf G., Chipaux M., Ferrand-Sorbets S., Dorfmuller G., Sisodiya S., Balestrini S., Schoeler N., Hernandez-Hernandez L., Krithika S., Oegema R., Hagebeuk E., Gunning B., Deckers C., Berghuis B., Wegner I., Niks E., Jansen F.E., Braun K., de Jong D., Rubboli G., Talvik I., Sander V., Uldall P., Jacquemont M.-L., Nava C., Leguern E., Julia S., Gambardella A., d'Orsi G., Crichiutti G., Faivre L., Darmency V., Benova B., Krsek P., Biraben A., Lebre A.-S., Jennesson M., Sattar S., Marchal C., Nordli D.R., Lindstrom K., Striano P., Lomax L.B., Kiss C., Bartolomei F., Lepine A.F., Schoonjans A.-S., Stouffs K., Jansen A., Panagiotakaki E., Ricard-Mousnier B., Thevenon J., de Bellescize J., Catenoix H., Dorn T., Zenker M., Muller-Schluter K., Brandt C., Krey I., Polster T., Wolff M., Balci M., Rostasy K., Achaz G., Zacher P., Becher T., Cloppenborg T., Yuskaitis C.J., Weckhuysen S., Poduri A., Lemke J.R., Moller R.S., Baulac S., Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute (ICM), 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)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Department of Genetics [Utrecht, the Netherlands], University Medical Center [Utrecht], Service de Génétique [HCL Groupement Hospitalier Est], Groupement Hospitalier Lyon-Est (GHE), Hospices Civils de Lyon (HCL)-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), Children's Hospital A. Meyer, Service de Neurologie [Strasbourg], CHU Strasbourg-Hopital Civil, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Department of Clinical and Experimental Epilepsy, University College of London [London] (UCL), Academic Center for Epileptology Kempenhaeghe & Maastricht UMC+ [Heeze], Danish Epilepsy Centre, Denmark and Aarhus University, Aarhus, Centre Hospitalier Universitaire de La Réunion (CHU La Réunion), Service de Génétique Cytogénétique et Embryologie [CHU Pitié-Salpêtrière], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Service de génétique médicale [Toulouse], CHU Toulouse [Toulouse], 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), FHU TRANSLAD (CHU de Dijon), Université de Bourgogne (UB), Service de Neurophysiologie Clinique (CHU Dijon), CHU Pontchaillou [Rennes], Service de pédiatrie spécialisée et médecine infantile (neurologie, pneumologie, maladies héréditaires du métabolisme) [Hôpital de la Timone - APHM], Hôpital de la Timone [CHU - APHM] (TIMONE), Epilepsie, sommeil et explorations fonctionnelles neuropédiatriques, Hospices Civils de Lyon (HCL)-Hôpital Femme Mère Enfant, 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, Université Bourgogne Franche-Comté [COMUE] (UBFC), Département d'Epilepsie, Sommeil et Neurophysiologie Pédiatrique [HCL, Lyon], Hospices Civils de Lyon (HCL), Institute of Human Genetics, University Hospital Magdeburg, Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Groupement hospitalier Lyon-Est, Centre de recherche en neurosciences de Lyon (CRNL), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), and CHU Toulouse [Toulouse]-Hôpital Purpan [Toulouse]

Subjects
Male, 0301 basic medicine, Proband, DEPDC5, SUDEP, 030105 genetics & heredity, Bioinformatics, Loss of Function Mutation/genetics, Epilepsy, INDEL Mutation, Loss of Function Mutation, mTORC1 pathway, Genetics(clinical), Child, Genetics (clinical), Multiprotein Complexes/genetics, Brugada Syndrome, DNA Copy Number Variation, Brugada syndrome, INDEL Mutation/genetics, GTPase-Activating Proteins, NPRL3, Seizure, Phenotype, Pedigree, 3. Good health, Brugada Syndrome/genetics, Child, Preschool, Female, Human, Signal Transduction, DNA Copy Number Variations, Adolescent, Seizures/complications, Mechanistic Target of Rapamycin Complex 1/genetics, DNA Copy Number Variations/genetics, Mechanistic Target of Rapamycin Complex 1, Tumor Suppressor Proteins/genetics, Article, Focal cortical dysplasia, 03 medical and health sciences, Seizures, GTPase-Activating Proteins/genetics, medicine, Humans, Genetic Predisposition to Disease, Genetic focal epilepsy, Epilepsy/complications, Repressor Proteins/genetics, business.industry, GTPase-Activating Protein, Tumor Suppressor Proteins, Infant, Newborn, Correction, Infant, Repressor Protein, Cortical dysplasia, medicine.disease, ddc:616.8, Repressor Proteins, 030104 developmental biology, Frontal lobe seizures, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, Multiprotein Complexes, Multiprotein Complexe, Signal Transduction/genetics, Human medicine, business
Abstract

Purpose:\ud \ud To define the phenotypic and mutational spectrum of epilepsies related to DEPDC5, NPRL2 and NPRL3 genes encoding the GATOR1 complex, a negative regulator of the mTORC1 pathway.\ud \ud Methods:\ud \ud We analyzed clinical and genetic data of 73 novel probands (familial and sporadic) with epilepsy-related variants in GATOR1-encoding genes and proposed new guidelines for clinical interpretation of GATOR1 variants.\ud \ud Results:\ud \ud The GATOR1 seizure phenotype consisted mostly in focal seizures (e.g., hypermotor or frontal lobe seizures in 50%), with a mean age at onset of 4.4 years, often sleep-related and drug-resistant (54%), and associated with focal cortical dysplasia (20%). Infantile spasms were reported in 10% of the probands. Sudden unexpected death in epilepsy (SUDEP) occurred in 10% of the families. Novel classification framework of all 140 epilepsy-related GATOR1 variants (including the variants of this study) revealed that 68% are loss-of-function pathogenic, 14% are likely pathogenic, 15% are variants of uncertain significance and 3% are likely benign.\ud \ud Conclusion:\ud \ud Our data emphasize the increasingly important role of GATOR1 genes in the pathogenesis of focal epilepsies (>180 probands to date). The GATOR1 phenotypic spectrum ranges from sporadic early-onset epilepsies with cognitive impairment comorbidities to familial focal epilepsies, and SUDEP.

Published
2018

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