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619 results on '"Muhle, Hiltrud"'

2. Semantic Similarity Analysis Reveals Robust Gene-Disease Relationships in Developmental and Epileptic Encephalopathies

Author

Galer, Peter D, Ganesan, Shiva, Lewis-Smith, David, McKeown, Sarah E, Pendziwiat, Manuela, Helbig, Katherine L, Ellis, Colin A, Rademacher, Annika, Smith, Lacey, Poduri, Annapurna, Seiffert, Simone, von Spiczak, Sarah, Muhle, Hiltrud, van Baalen, Andreas, Group, NCEE Study, Investigators, EPGP, Consortium, EuroEPINOMICS-RES, Network, Genomics Research and Innovation, Thomas, Rhys H, Krause, Roland, Weber, Yvonne, and Helbig, Ingo

Subjects
Biological Sciences, Genetics, Neurodegenerative, Epilepsy, Prevention, Neurosciences, Brain Disorders, Pediatric, Aetiology, 2.1 Biological and endogenous factors, Good Health and Well Being, Child, Preschool, Cohort Studies, Female, GABA Plasma Membrane Transport Proteins, Gene Expression, Gene Ontology, Humans, Male, Munc18 Proteins, Mutation, NAV1.1 Voltage-Gated Sodium Channel, Phenotype, Seizures, Semantics, Shab Potassium Channels, Spasms, Infantile, Speech Disorders, Terminology as Topic, Exome Sequencing, NCEE Study Group, EPGP Investigators, EuroEPINOMICS-RES Consortium, Genomics Research and Innovation Network, Human Phenotype Ontology, childhood epilepsies, computational phenotypes, developmental and epileptic encephalopathies, electronic medical records, neurogenetic disorders, whole-exome sequencing, Medical and Health Sciences, Genetics & Heredity, Biological sciences, Biomedical and clinical sciences, Health sciences
Abstract

More than 100 genetic etiologies have been identified in developmental and epileptic encephalopathies (DEEs), but correlating genetic findings with clinical features at scale has remained a hurdle because of a lack of frameworks for analyzing heterogenous clinical data. Here, we analyzed 31,742 Human Phenotype Ontology (HPO) terms in 846 individuals with existing whole-exome trio data and assessed associated clinical features and phenotypic relatedness by using HPO-based semantic similarity analysis for individuals with de novo variants in the same gene. Gene-specific phenotypic signatures included associations of SCN1A with "complex febrile seizures" (HP: 0011172; p = 2.1 × 10-5) and "focal clonic seizures" (HP: 0002266; p = 8.9 × 10-6), STXBP1 with "absent speech" (HP: 0001344; p = 1.3 × 10-11), and SLC6A1 with "EEG with generalized slow activity" (HP: 0010845; p = 0.018). Of 41 genes with de novo variants in two or more individuals, 11 genes showed significant phenotypic similarity, including SCN1A (n = 16, p < 0.0001), STXBP1 (n = 14, p = 0.0021), and KCNB1 (n = 6, p = 0.011). Including genetic and phenotypic data of control subjects increased phenotypic similarity for all genetic etiologies, whereas the probability of observing de novo variants decreased, emphasizing the conceptual differences between semantic similarity analysis and approaches based on the expected number of de novo events. We demonstrate that HPO-based phenotype analysis captures unique profiles for distinct genetic etiologies, reflecting the breadth of the phenotypic spectrum in genetic epilepsies. Semantic similarity can be used to generate statistical evidence for disease causation analogous to the traditional approach of primarily defining disease entities through similar clinical features.

Published
2020

3. Ultra-Rare Genetic Variation in the Epilepsies: A Whole-Exome Sequencing Study of 17,606 Individuals

Author

Collaborative, Epi25, Feng, Yen-Chen Anne, Howrigan, Daniel P, Abbott, Liam E, Tashman, Katherine, Cerrato, Felecia, Singh, Tarjinder, Heyne, Henrike, Byrnes, Andrea, Churchhouse, Claire, Watts, Nick, Solomonson, Matthew, Lal, Dennis, Heinzen, Erin L, Dhindsa, Ryan S, Stanley, Kate E, Cavalleri, Gianpiero L, Hakonarson, Hakon, Helbig, Ingo, Krause, Roland, May, Patrick, Weckhuysen, Sarah, Petrovski, Slavé, Kamalakaran, Sitharthan, Sisodiya, Sanjay M, Cossette, Patrick, Cotsapas, Chris, De Jonghe, Peter, Dixon-Salazar, Tracy, Guerrini, Renzo, Kwan, Patrick, Marson, Anthony G, Stewart, Randy, Depondt, Chantal, Dlugos, Dennis J, Scheffer, Ingrid E, Striano, Pasquale, Freyer, Catharine, McKenna, Kevin, Regan, Brigid M, Bellows, Susannah T, Leu, Costin, Bennett, Caitlin A, Johns, Esther MC, Macdonald, Alexandra, Shilling, Hannah, Burgess, Rosemary, Weckhuysen, Dorien, Bahlo, Melanie, O’Brien, Terence J, Todaro, Marian, Stamberger, Hannah, Andrade, Danielle M, Sadoway, Tara R, Mo, Kelly, Krestel, Heinz, Gallati, Sabina, Papacostas, Savvas S, Kousiappa, Ioanna, Tanteles, George A, Štěrbová, Katalin, Vlčková, Markéta, Sedláčková, Lucie, Laššuthová, Petra, Klein, Karl Martin, Rosenow, Felix, Reif, Philipp S, Knake, Susanne, Kunz, Wolfram S, Zsurka, Gábor, Elger, Christian E, Bauer, Jürgen, Rademacher, Michael, Pendziwiat, Manuela, Muhle, Hiltrud, Rademacher, Annika, van Baalen, Andreas, von Spiczak, Sarah, Stephani, Ulrich, Afawi, Zaid, Korczyn, Amos D, Kanaan, Moien, Canavati, Christina, Kurlemann, Gerhard, Müller-Schlüter, Karen, Kluger, Gerhard, Häusler, Martin, Blatt, Ilan, Lemke, Johannes R, Krey, Ilona, Weber, Yvonne G, Wolking, Stefan, Becker, Felicitas, Hengsbach, Christian, Rau, Sarah, Maisch, Ana F, Steinhoff, Bernhard J, Schulze-Bonhage, Andreas, Schubert-Bast, Susanne, and Schreiber, Herbert

Subjects
Clinical Research, Human Genome, Neurosciences, Epilepsy, Biotechnology, Genetics, Neurodegenerative, Brain Disorders, 2.1 Biological and endogenous factors, Aetiology, Neurological, Case-Control Studies, DNA Mutational Analysis, Exome, Genetic Markers, Genetic Predisposition to Disease, Genetic Variation, Humans, Phenotype, Exome Sequencing, Epi25 Collaborative. Electronic address: s.berkovic@unimelb.edu.au, Epi25 Collaborative, burden analysis, epilepsy, epileptic encephalopathy, exome, seizures, sequencing, Biological Sciences, Medical and Health Sciences, Genetics & Heredity
Abstract

Sequencing-based studies have identified novel risk genes associated with severe epilepsies and revealed an excess of rare deleterious variation in less-severe forms of epilepsy. To identify the shared and distinct ultra-rare genetic risk factors for different types of epilepsies, we performed a whole-exome sequencing (WES) analysis of 9,170 epilepsy-affected individuals and 8,436 controls of European ancestry. We focused on three phenotypic groups: severe developmental and epileptic encephalopathies (DEEs), genetic generalized epilepsy (GGE), and non-acquired focal epilepsy (NAFE). We observed that compared to controls, individuals with any type of epilepsy carried an excess of ultra-rare, deleterious variants in constrained genes and in genes previously associated with epilepsy; we saw the strongest enrichment in individuals with DEEs and the least strong in individuals with NAFE. Moreover, we found that inhibitory GABAA receptor genes were enriched for missense variants across all three classes of epilepsy, whereas no enrichment was seen in excitatory receptor genes. The larger gene groups for the GABAergic pathway or cation channels also showed a significant mutational burden in DEEs and GGE. Although no single gene surpassed exome-wide significance among individuals with GGE or NAFE, highly constrained genes and genes encoding ion channels were among the lead associations; such genes included CACNA1G, EEF1A2, and GABRG2 for GGE and LGI1, TRIM3, and GABRG2 for NAFE. Our study, the largest epilepsy WES study to date, confirms a convergence in the genetics of severe and less-severe epilepsies associated with ultra-rare coding variation, and it highlights a ubiquitous role for GABAergic inhibition in epilepsy etiology.

Published
2019

4. SLC35A2‐CDG: Functional characterization, expanded molecular, clinical, and biochemical phenotypes of 30 unreported Individuals

Author

Ng, Bobby G, Sosicka, Paulina, Agadi, Satish, Almannai, Mohammed, Bacino, Carlos A, Barone, Rita, Botto, Lorenzo D, Burton, Jennifer E, Carlston, Colleen, Chung, Brian Hon‐Yin, Cohen, Julie S, Coman, David, Dipple, Katrina M, Dorrani, Naghmeh, Dobyns, William B, Elias, Abdallah F, Epstein, Leon, Gahl, William A, Garozzo, Domenico, Hammer, Trine Bjørg, Haven, Jaclyn, Héron, Delphine, Herzog, Matthew, Hoganson, George E, Hunter, Jesse M, Jain, Mahim, Juusola, Jane, Lakhani, Shenela, Lee, Hane, Lee, Joy, Lewis, Katherine, Longo, Nicola, Lourenço, Charles Marques, Mak, Christopher CY, McKnight, Dianalee, Mendelsohn, Bryce A, Mignot, Cyril, Mirzaa, Ghayda, Mitchell, Wendy, Muhle, Hiltrud, Nelson, Stanley F, Olczak, Mariusz, Palmer, Christina GS, Partikian, Arthur, Patterson, Marc C, Pierson, Tyler M, Quinonez, Shane C, Regan, Brigid M, Ross, M Elizabeth, Sacoto, Maria J Guillen, Scaglia, Fernando, Scheffer, Ingrid E, Segal, Devorah, Singhal, Nilika Shah, Striano, Pasquale, Sturiale, Luisa, Symonds, Joseph D, Tang, Sha, Vilain, Eric, Willis, Mary, Wolfe, Lynne A, Yang, Hui, Yano, Shoji, Powis, Zöe, Suchy, Sharon F, Rosenfeld, Jill A, Edmondson, Andrew C, Grunewald, Stephanie, and Freeze, Hudson H

Subjects
Clinical Research, Pediatric, Genetics, Aetiology, 2.1 Biological and endogenous factors, Animals, Biopsy, CHO Cells, Cells, Cultured, Congenital Disorders of Glycosylation, Cricetulus, Female, Humans, Male, Monosaccharide Transport Proteins, Mutation, Uridine Diphosphate Galactose, congenital disorders of glycosylation, glycoside, nucleotide sugar transporter, UDP-galactose, Clinical Sciences, Genetics & Heredity
Abstract

Pathogenic de novo variants in the X-linked gene SLC35A2 encoding the major Golgi-localized UDP-galactose transporter required for proper protein and lipid glycosylation cause a rare type of congenital disorder of glycosylation known as SLC35A2-congenital disorders of glycosylation (CDG; formerly CDG-IIm). To date, 29 unique de novo variants from 32 unrelated individuals have been described in the literature. The majority of affected individuals are primarily characterized by varying degrees of neurological impairments with or without skeletal abnormalities. Surprisingly, most affected individuals do not show abnormalities in serum transferrin N-glycosylation, a common biomarker for most types of CDG. Here we present data characterizing 30 individuals and add 26 new variants, the single largest study involving SLC35A2-CDG. The great majority of these individuals had normal transferrin glycosylation. In addition, expanding the molecular and clinical spectrum of this rare disorder, we developed a robust and reliable biochemical assay to assess SLC35A2-dependent UDP-galactose transport activity in primary fibroblasts. Finally, we show that transport activity is directly correlated to the ratio of wild-type to mutant alleles in fibroblasts from affected individuals.

Published
2019

5. Clinical spectrum of STX1B-related epileptic disorders.

Author

Cilio, Maria, Van Paesschen, Wim, Svendsen, Lene, Oates, Stephanie, Hughes, Elaine, Goyal, Sushma, Brown, Kathleen, Sifuentes Saenz, Margarita, Dorn, Thomas, Muhle, Hiltrud, Pagnamenta, Alistair, Vavoulis, Dimitris, Knight, Samantha, Taylor, Jenny, Canevini, Maria, Darra, Francesca, Gavrilova, Ralitza, Powis, Zöe, Tang, Shan, Marquetand, Justus, Armstrong, Martin, McHale, Duncan, Klee, Eric, Kluger, Gerhard, Lowenstein, Daniel, Weckhuysen, Sarah, Pal, Deb, Helbig, Ingo, Guerrini, Renzo, Thomas, Rhys, Rees, Mark, Lesca, Gaetan, Sisodiya, Sanjay, Weber, Yvonne, Lal, Dennis, Marini, Carla, Lerche, Holger, Schubert, Julian, Wolking, Stefan, May, Patrick, Mei, Davide, Møller, Rikke, Balestrini, Simona, Helbig, Katherine, Altuzarra, Cecilia, Chatron, Nicolas, Kaiwar, Charu, Stöhr, Katharina, Widdess-Walsh, Peter, Mendelsohn, Bryce, and Numis, Adam

Subjects
Adolescent, Anticonvulsants, Child, Child, Preschool, Developmental Disabilities, Drug Resistant Epilepsy, Electroencephalography, Epilepsies, Partial, Epileptic Syndromes, Female, High-Throughput Nucleotide Sequencing, Humans, Infant, Infant, Newborn, Learning Disabilities, Loss of Function Mutation, Male, Mutation, Missense, Phenotype, Seizures, Febrile, Sequence Analysis, DNA, Syntaxin 1, Young Adult
Abstract

OBJECTIVE: The aim of this study was to expand the spectrum of epilepsy syndromes related to STX1B, encoding the presynaptic protein syntaxin-1B, and establish genotype-phenotype correlations by identifying further disease-related variants. METHODS: We used next-generation sequencing in the framework of research projects and diagnostic testing. Clinical data and EEGs were reviewed, including already published cases. To estimate the pathogenicity of the variants, we used established and newly developed in silico prediction tools. RESULTS: We describe 17 new variants in STX1B, which are distributed across the whole gene. We discerned 4 different phenotypic groups across the newly identified and previously published patients (49 patients in 23 families): (1) 6 sporadic patients or families (31 affected individuals) with febrile and afebrile seizures with a benign course, generally good drug response, normal development, and without permanent neurologic deficits; (2) 2 patients with genetic generalized epilepsy without febrile seizures and cognitive deficits; (3) 13 patients or families with intractable seizures, developmental regression after seizure onset and additional neuropsychiatric symptoms; (4) 2 patients with focal epilepsy. More often, we found loss-of-function mutations in benign syndromes, whereas missense variants in the SNARE motif of syntaxin-1B were associated with more severe phenotypes. CONCLUSION: These data expand the genetic and phenotypic spectrum of STX1B-related epilepsies to a diverse range of epilepsies that span the International League Against Epilepsy classification. Variants in STX1B are protean and contribute to many different epilepsy phenotypes, similar to SCN1A, the most important gene associated with fever-associated epilepsies.

Published
2019

7. Health-related quality of life in children and adolescents with tuberous sclerosis complex and their caregivers: A multicentre cohort study from Germany

Author

Willems, Laurent M., Schubert-Bast, Susanne, Grau, Janina, Hertzberg, Christoph, Kurlemann, Gerhard, Wiemer-Kruel, Adelheid, Bast, Thomas, Bertsche, Astrid, Bettendorf, Ulrich, Fiedler, Barbara, Hahn, Andreas, Hartmann, Hans, Hornemann, Frauke, Immisch, Ilka, Jacobs, Julia, Kieslich, Matthias, Klein, Karl Martin, Klotz, Kerstin A., Kluger, Gerhard, Knuf, Markus, Mayer, Thomas, Marquard, Klaus, Meyer, Sascha, Muhle, Hiltrud, Müller-Schlüter, Karen, Noda, Anna H., Ruf, Susanne, Sauter, Matthias, Schlump, Jan-Ulrich, Syrbe, Steffen, Thiels, Charlotte, Trollmann, Regina, Wilken, Bernd, Zöllner, Johann Philipp, Rosenow, Felix, and Strzelczyk, Adam

Published
2021
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8. Efficacy, Retention and Tolerability of Everolimus in Patients with Tuberous Sclerosis Complex: A Survey-Based Study on Patients’ Perspectives

Author

Willems, Laurent M., Rosenow, Felix, Schubert-Bast, Susanne, Kurlemann, Gerhard, Zöllner, Johann Philipp, Bast, Thomas, Bertsche, Astrid, Bettendorf, Ulrich, Ebrahimi-Fakhari, Daniel, Grau, Janina, Hahn, Andreas, Hartmann, Hans, Hertzberg, Christoph, Hornemann, Frauke, Immisch, Ilka, Jacobs, Julia, Klein, Karl Martin, Klotz, Kerstin A., Kluger, Gerhard, Knake, Susanne, Knuf, Markus, Marquard, Klaus, Mayer, Thomas, Meyer, Sascha, Muhle, Hiltrud, Müller-Schlüter, Karen, von Podewils, Felix, Ruf, Susanne, Sauter, Matthias, Schäfer, Hannah, Schlump, Jan-Ulrich, Syrbe, Steffen, Thiels, Charlotte, Trollmann, Regina, Wiemer-Kruel, Adelheid, Wilken, Bernd, Zukunft, Bianca, and Strzelczyk, Adam

Published
2021
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9. DNM1 encephalopathy

Author

von Spiczak, Sarah, Helbig, Katherine L, Shinde, Deepali N, Huether, Robert, Pendziwiat, Manuela, Lourenço, Charles, Nunes, Mark E, Sarco, Dean P, Kaplan, Richard A, Dlugos, Dennis J, Kirsch, Heidi, Slavotinek, Anne, Cilio, Maria R, Cervenka, Mackenzie C, Cohen, Julie S, McClellan, Rebecca, Fatemi, Ali, Yuen, Amy, Sagawa, Yoshimi, Littlejohn, Rebecca, McLean, Scott D, Hernandez-Hernandez, Laura, Maher, Bridget, Møller, Rikke S, Palmer, Elizabeth, Lawson, John A, Campbell, Colleen A, Joshi, Charuta N, Kolbe, Diana L, Hollingsworth, Georgie, Neubauer, Bernd A, Muhle, Hiltrud, Stephani, Ulrich, Scheffer, Ingrid E, Pena, Sérgio DJ, Sisodiya, Sanjay M, and Helbig, Ingo

Subjects
Neurosciences, Intellectual and Developmental Disabilities (IDD), Genetics, Clinical Research, Brain Disorders, Epilepsy, Pediatric, Neurodegenerative, Aetiology, 2.1 Biological and endogenous factors, Adolescent, Brain Diseases, Child, Child, Preschool, Cohort Studies, DNA Mutational Analysis, Dynamins, Female, GTP Phosphohydrolases, Homeodomain Proteins, Humans, Infant, Male, Microtubule-Associated Proteins, Mitochondrial Proteins, Models, Molecular, Mutation, Phenotype, Short Stature Homeobox Protein, Siblings, Synaptic Vesicles, Young Adult, Epi4K Consortium, EuroEPINOMICS-RES NLES Working Group, Clinical Sciences, Cognitive Sciences, Neurology & Neurosurgery
Abstract

ObjectiveTo evaluate the phenotypic spectrum caused by mutations in dynamin 1 (DNM1), encoding the presynaptic protein DNM1, and to investigate possible genotype-phenotype correlations and predicted functional consequences based on structural modeling.MethodsWe reviewed phenotypic data of 21 patients (7 previously published) with DNM1 mutations. We compared mutation data to known functional data and undertook biomolecular modeling to assess the effect of the mutations on protein function.ResultsWe identified 19 patients with de novo mutations in DNM1 and a sibling pair who had an inherited mutation from a mosaic parent. Seven patients (33.3%) carried the recurrent p.Arg237Trp mutation. A common phenotype emerged that included severe to profound intellectual disability and muscular hypotonia in all patients and an epilepsy characterized by infantile spasms in 16 of 21 patients, frequently evolving into Lennox-Gastaut syndrome. Two patients had profound global developmental delay without seizures. In addition, we describe a single patient with normal development before the onset of a catastrophic epilepsy, consistent with febrile infection-related epilepsy syndrome at 4 years. All mutations cluster within the GTPase or middle domains, and structural modeling and existing functional data suggest a dominant-negative effect on DMN1 function.ConclusionsThe phenotypic spectrum of DNM1-related encephalopathy is relatively homogeneous, in contrast to many other genetic epilepsies. Up to one-third of patients carry the recurrent p.Arg237Trp variant, which is now one of the most common recurrent variants in epileptic encephalopathies identified to date. Given the predicted dominant-negative mechanism of this mutation, this variant presents a prime target for therapeutic intervention.

Published
2017

10. DNM1 encephalopathy: A new disease of vesicle fission.

Author

von Spiczak, Sarah, Helbig, Katherine L, Shinde, Deepali N, Huether, Robert, Pendziwiat, Manuela, Lourenço, Charles, Nunes, Mark E, Sarco, Dean P, Kaplan, Richard A, Dlugos, Dennis J, Kirsch, Heidi, Slavotinek, Anne, Cilio, Maria R, Cervenka, Mackenzie C, Cohen, Julie S, McClellan, Rebecca, Fatemi, Ali, Yuen, Amy, Sagawa, Yoshimi, Littlejohn, Rebecca, McLean, Scott D, Hernandez-Hernandez, Laura, Maher, Bridget, Møller, Rikke S, Palmer, Elizabeth, Lawson, John A, Campbell, Colleen A, Joshi, Charuta N, Kolbe, Diana L, Hollingsworth, Georgie, Neubauer, Bernd A, Muhle, Hiltrud, Stephani, Ulrich, Scheffer, Ingrid E, Pena, Sérgio DJ, Sisodiya, Sanjay M, Helbig, Ingo, Epi4K Consortium, and EuroEPINOMICS-RES NLES Working Group

Subjects
Epi4K Consortium, EuroEPINOMICS-RES NLES Working Group, Synaptic Vesicles, Humans, Brain Diseases, GTP Phosphohydrolases, Microtubule-Associated Proteins, Homeodomain Proteins, Mitochondrial Proteins, Cohort Studies, DNA Mutational Analysis, Siblings, Phenotype, Mutation, Models, Molecular, Adolescent, Child, Child, Preschool, Infant, Female, Male, Young Adult, Short Stature Homeobox Protein, Dynamins, Models, Molecular, Preschool, Clinical Sciences, Neurosciences, Cognitive Sciences, Neurology & Neurosurgery
Abstract

ObjectiveTo evaluate the phenotypic spectrum caused by mutations in dynamin 1 (DNM1), encoding the presynaptic protein DNM1, and to investigate possible genotype-phenotype correlations and predicted functional consequences based on structural modeling.MethodsWe reviewed phenotypic data of 21 patients (7 previously published) with DNM1 mutations. We compared mutation data to known functional data and undertook biomolecular modeling to assess the effect of the mutations on protein function.ResultsWe identified 19 patients with de novo mutations in DNM1 and a sibling pair who had an inherited mutation from a mosaic parent. Seven patients (33.3%) carried the recurrent p.Arg237Trp mutation. A common phenotype emerged that included severe to profound intellectual disability and muscular hypotonia in all patients and an epilepsy characterized by infantile spasms in 16 of 21 patients, frequently evolving into Lennox-Gastaut syndrome. Two patients had profound global developmental delay without seizures. In addition, we describe a single patient with normal development before the onset of a catastrophic epilepsy, consistent with febrile infection-related epilepsy syndrome at 4 years. All mutations cluster within the GTPase or middle domains, and structural modeling and existing functional data suggest a dominant-negative effect on DMN1 function.ConclusionsThe phenotypic spectrum of DNM1-related encephalopathy is relatively homogeneous, in contrast to many other genetic epilepsies. Up to one-third of patients carry the recurrent p.Arg237Trp variant, which is now one of the most common recurrent variants in epileptic encephalopathies identified to date. Given the predicted dominant-negative mechanism of this mutation, this variant presents a prime target for therapeutic intervention.

Published
2017

12. A post glycosylphosphatidylinositol (GPI) attachment to proteins, type 2 (PGAP2) variant identified in Mabry syndrome index cases: Molecular genetics of the prototypical inherited GPI disorder

Author

Thompson, Miles D., Knaus, Alexej A., Barshop, Bruce A., Caliebe, Almuth, Muhle, Hiltrud, Nguyen, Thi Tuyet Mai, Baratang, Nissan V., Kinoshita, Taroh, Percy, Maire E., Campeau, Philippe M., Murakami, Yoshiko, Cole, David E., Krawitz, Peter M., and Mabry, C. Charlton

Published
2020
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14. Direct and indirect costs and cost-driving factors of Tuberous sclerosis complex in children, adolescents, and caregivers: a multicenter cohort study

Author

Grau, Janina, Zöllner, Johann Philipp, Schubert-Bast, Susanne, Kurlemann, Gerhard, Hertzberg, Christoph, Wiemer-Kruel, Adelheid, Bast, Thomas, Bertsche, Astrid, Bettendorf, Ulrich, Fiedler, Barbara, Hahn, Andreas, Hartmann, Hans, Hornemann, Frauke, Immisch, Ilka, Jacobs, Julia, Kieslich, Matthias, Klein, Karl Martin, Klotz, Kerstin A., Kluger, Gerhard, Knuf, Markus, Mayer, Thomas, Marquard, Klaus, Meyer, Sascha, Muhle, Hiltrud, Müller-Schlüter, Karen, Noda, Anna H., Ruf, Susanne, Sauter, Matthias, Schlump, Jan-Ulrich, Syrbe, Steffen, Thiels, Charlotte, Trollmann, Regina, Wilken, Bernd, Willems, Laurent M., Rosenow, Felix, and Strzelczyk, Adam

Published
2021
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15. List of Contributors

Author

Aaen, Gregory, primary, Abroms, Israel F., additional, Ådén, Ulrika, additional, Ahlsten, Gunnar, additional, Aird, Robert B., additional, Al-Zaidy, Samiah A., additional, Andermann, Fred, additional, Anlar, Banu, additional, Arzimanoglou, Alexis, additional, Ashwal, Stephen, additional, Augustine, Erika, additional, Ballaban-Gil, Karen, additional, Bamford, Nigel S., additional, Barlow, Charles F., additional, Bast, Thomas, additional, Bates, David, additional, Baumann, Robert J., additional, Bertini, Enrico, additional, Beya, Alidor, additional, Blaw, Michael, additional, Bodensteiner, John, additional, Bonthius, Daniel J., additional, Brin, Amy E., additional, Brockmann, Knut, additional, Brown, John Keith, additional, Brown, Stuart B., additional, Brumback, Audrey Christine, additional, Bureau, Michelle, additional, Burke, James R., additional, Bye, Annie, additional, Camfield, Carol, additional, Camfield, Peter, additional, Campistol Plana, Jaume, additional, Canale, Dee James, additional, Caneris, Onasis, additional, Caraballo, Roberto H., additional, Caviness, Alison Chantal, additional, Chao, Hsiao-Tuan, additional, Chapman, Catherine A., additional, Chaves-Carballo, Enrique, additional, Cho, Yoon-Jae, additional, Christen, Hans-Jürgen, additional, Chugani, Harry T., additional, Cioni, Giovanni, additional, Clark, David, additional, Cliff, Edward Robert Scheffer, additional, Cochran, Frederick B., additional, Cohen, Bruce H., additional, Cohen, Maynard M., additional, Collins, Kevin, additional, Covanis, Athanasios, additional, Critchley, Macdonald, additional, Cross, J. Helen, additional, Crumrine, Patricia K., additional, Curatolo, Paolo, additional, Davies, Pamela A., additional, deVeber, Gabrielle, additional, De Vivo, Darryl C., additional, de Vries, Linda S., additional, De Waele, Liesbeth, additional, DeMyer, William, additional, Devlin, Anita, additional, Dobyns, William B., additional, Dodson, W. Edwin, additional, Donald, Kirsty, additional, Duffy, Frank H., additional, Dunn, David W., additional, Dunn, Henry G., additional, Dure, Leon S., additional, Dyken, Paul Richard, additional, Encha-Razavi, Férechté, additional, Erenberg, Gerald, additional, Estes, Melinda L., additional, Evrard, Philippe, additional, Ferriero, Donna, additional, Ferry, Peggy, additional, Fine, Archie, additional, Fine, Edward J., additional, Fine, John S., additional, Finkel, Richard S., additional, Fischer, Alain, additional, Fischer, Christine, additional, Fogan, Lance, additional, Fowler, Glenn W., additional, Frank, Yitzchak, additional, Fullerton, Heather J., additional, Furukawa, Tetsuo, additional, Gabriel, Ronald S., additional, Galanopoulou, Aristea S., additional, Gardner-Medwin, David, additional, Garg, Bhuwan, additional, Genton, Pierre, additional, George, Mark S., additional, Gineste, Thierry, additional, Giza, Christopher C., additional, Goemans, Nathalie, additional, Golden, Gerald S., additional, Golden, Jeffrey Alan, additional, Goldstein, Gary W., additional, Gomez, Christopher, additional, Gomez, Manuel R., additional, Gomez, Timothy, additional, Goodkin, Howard P., additional, Gordon, Neil, additional, Gressens, Pierre, additional, Groger, Helmut, additional, Guerrini, Renzo, additional, Gurnett, Christina A., additional, Gussoni, Emanuela, additional, Haas, Richard, additional, Hagberg, Bengt, additional, Haller, Jerome S., additional, Hartman, Adam L., additional, Haruda, Fred, additional, Hirtz, Deborah, additional, Hogan, Gwendolyn R., additional, Hunt, Guy M., additional, Iannaccone, Susan T., additional, Eleanor Inder, Terrie, additional, Ionasescu, Victor, additional, Jansen, Katrien, additional, Jiang, Yuwu, additional, Kaminski, Henry J., additional, Kamoshita, Shigehiko, additional, Kang, Peter B., additional, Kaufman, David M., additional, Kaufmann, Walter E., additional, Kaye, Edward M., additional, Kellaway, Peter, additional, Kelley, Rhona S., additional, Kennedy, Charles, additional, Kim, Young-Min, additional, Kirby, Michael, additional, Kirton, Adam, additional, Kobayashi, Eliane, additional, Kossoff, Eric H., additional, Koutroumanidis, Michail, additional, Krupp, Lauren, additional, Lange, Bernadette M., additional, Lanska, Douglas J., additional, Lanska, Mary Jo, additional, Larsen, Paul D., additional, Lassoff, Samuel J., additional, Laterra, John, additional, Lemieux, Bernard, additional, Lenn, Nicholas J., additional, Logan, William J., additional, Lomax, Elizabeth, additional, Longo, Lawrence D., additional, Lorris Betz, A., additional, Manyam, Bala V., additional, Marks, Warren A., additional, Massey, E. Wayne, additional, Mate, Laszlo J., additional, McKinlay, Ian, additional, McLean, William T., additional, McLellan, Ailsa, additional, Mehler, Mark F., additional, Melchior, Johannes C., additional, Michelson, David J., additional, Miller, Steven P., additional, Miller, Suzanne L., additional, Millichap, J. Gordon, additional, Minns, Robert A., additional, Mizrahi, Eli M., additional, Moser, Ann B., additional, Moshé, Solomon L., additional, Muhle, Hiltrud, additional, Muntoni, Francesco, additional, Naidu, Sakkubai, additional, Narayanan, Vinodh, additional, Nardocci, Nardo, additional, Neil, Jeffrey J., additional, Neumeyer, Ann, additional, Noetzel, Michael J., additional, Nomura, Yoshiko, additional, Nordli, Douglas R., additional, North, Kathryn, additional, Ohtsuka, Yoko, additional, O’Callaghan, Finbar J.K., additional, Packer, Roger J., additional, Pastores, Gregory M., additional, Patterson, Marc C., additional, Pearl, Phillip L., additional, Philippart, Michel, additional, Pihko, Helena S., additional, Piller, Gordon, additional, Platz, Thomas F., additional, Poduri, Annapurna, additional, Pollack, Michael A., additional, Porter, Brenda E., additional, Provis, Michèle, additional, Rating, Dietz, additional, Reich, Harold, additional, Remler, Bernd, additional, Rho, Jong M., additional, Richards, Peter, additional, Richardson, Edward P., additional, Richardson, Sylvia O., additional, Roach, E. Steve, additional, Rose, Arthur L., additional, Rozear, Marvin P., additional, Rubinstein, Lucien J., additional, Rust, Robert S., additional, Saini, Arushi Gahlot, additional, Saint-Anne Dargassies, Suzanne, additional, Sarnat, Harvey B., additional, Sarwar, Mohammad, additional, Satran, Richard, additional, Schneider, Sanford, additional, Schrank, Waltraud, additional, Scott, Rodney C., additional, Seinfeld, Syndi, additional, Selcen, Duygu, additional, Sestan, Nenad, additional, Shapiro, Steven, additional, Sherr, Elliott H., additional, Shevell, Michael, additional, Shield, Lloyd, additional, Sidman, Richard L., additional, Silverstein, Faye S., additional, Sinnreich, Michael, additional, Snead, O. Carter, additional, Solomons, Regan, additional, Soria-Duran, Emilio, additional, Stafstrom, Carl E., additional, Steven Roach, E., additional, Stevens, Harold, additional, Strassburg, Hans Michael, additional, Stumpf, David A., additional, Sullivan, Thomas, additional, Swick, Herbert M., additional, Swisher, Charles N., additional, Takahashi, Takao, additional, Tein, Ingrid, additional, Tochen, Laura, additional, Thomas, Eva E., additional, Thompson, Alan, additional, Toor, Svinder S., additional, Tyler, H. Richard, additional, Uldall, Peter, additional, Urion, David K., additional, Valappil, Ahsan Moosa Naduvil, additional, Van Toorn, Ronald, additional, Vermilion, Jennifer, additional, Vidaver, Doris, additional, Vohr, Betty R., additional, Vollmer, Brigitte, additional, Volpe, Joseph J., additional, Waber, Deborah P., additional, Wainwright, Mark S., additional, Waites, Lucius, additional, Walsh, Christopher, additional, Weindl, Adolf, additional, Whelan, Mary Anne, additional, White, Larry E., additional, Whittemore, Vicky Holets, additional, Wilmshurst, Jo, additional, Wirrell, Elaine, additional, Wolf, Nicole I., additional, Youssef, Paul, additional, Zempel, John, additional, Zoghbi, Huda Y., additional, Zuberi, Sameer M., additional, and Zupanc, Mary, additional

Published
2021
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17. De Novo Mutations in Synaptic Transmission Genes Including DNM1 Cause Epileptic Encephalopathies

Author

Appenzeller, Silke, Balling, Rudi, Barisic, Nina, Baulac, Stéphanie, Caglayan, Hande, Craiu, Dana, De Jonghe, Peter, Depienne, Christel, Dimova, Petia, Djémié, Tania, Gormley, Padhraig, Guerrini, Renzo, Helbig, Ingo, Hjalgrim, Helle, Hoffman-Zacharska, Dorota, Jähn, Johanna, Klein, Karl Martin, Koeleman, Bobby, Komarek, Vladimir, Krause, Roland, Kuhlenbäumer, Gregor, Leguern, Eric, Lehesjoki, Anna-Elina, Lemke, Johannes R, Lerche, Holger, Linnankivi, Tarja, Marini, Carla, May, Patrick, Møller, Rikke S, Muhle, Hiltrud, Pal, Deb, Palotie, Aarno, Pendziwiat, Manuela, Robbiano, Angela, Roelens, Filip, Rosenow, Felix, Selmer, Kaja, Serratosa, Jose M, Sisodiya, Sanjay, Stephani, Ulrich, Sterbova, Katalin, Striano, Pasquale, Suls, Arvid, Talvik, Tiina, von Spiczak, Sarah, Weber, Yvonne, Weckhuysen, Sarah, Zara, Federico, Abou-Khalil, Bassel, Alldredge, Brian K, Andermann, Eva, Andermann, Frederick, Amron, Dina, Bautista, Jocelyn F, Berkovic, Samuel F, Bluvstein, Judith, Boro, Alex, Cascino, Gregory, Consalvo, Damian, Crumrine, Patricia, Devinsky, Orrin, Dlugos, Dennis, Epstein, Michael P, Fiol, Miguel, Fountain, Nathan B, French, Jacqueline, Friedman, Daniel, Geller, Eric B, Glauser, Tracy, Glynn, Simon, Haas, Kevin, Haut, Sheryl R, Hayward, Jean, Helmers, Sandra L, Joshi, Sucheta, Kanner, Andres, Kirsch, Heidi E, Knowlton, Robert C, Kossoff, Eric H, Kuperman, Rachel, Kuzniecky, Ruben, Lowenstein, Daniel H, McGuire, Shannon M, Motika, Paul V, Novotny, Edward J, Ottman, Ruth, Paolicchi, Juliann M, Parent, Jack, Park, Kristen, Poduri, Annapurna, Sadleir, Lynette, Scheffer, Ingrid E, Shellhaas, Renée A, Sherr, Elliott, Shih, Jerry J, Singh, Rani, Sirven, Joseph, Smith, Michael C, Sullivan, Joe, and Thio, Liu Lin

Subjects
Genetics, Pediatric, Neurosciences, Epilepsy, Brain Disorders, Neurodegenerative, 2.1 Biological and endogenous factors, Aetiology, Cohort Studies, Dynamin I, Exome, Fatty Acid Synthase, Type I, Female, Gene Regulatory Networks, Humans, Infant, Newborn, Lennox Gastaut Syndrome, Male, Mutation, Protein Interaction Maps, Receptors, GABA-B, Ryanodine Receptor Calcium Release Channel, Spasms, Infantile, Synaptic Transmission, EuroEPINOMICS-RES Consortium, Epilepsy Phenome/Genome Project, Epi4K Consortium, Biological Sciences, Medical and Health Sciences, Genetics & Heredity
Abstract

Emerging evidence indicates that epileptic encephalopathies are genetically highly heterogeneous, underscoring the need for large cohorts of well-characterized individuals to further define the genetic landscape. Through a collaboration between two consortia (EuroEPINOMICS and Epi4K/EPGP), we analyzed exome-sequencing data of 356 trios with the "classical" epileptic encephalopathies, infantile spasms and Lennox Gastaut syndrome, including 264 trios previously analyzed by the Epi4K/EPGP consortium. In this expanded cohort, we find 429 de novo mutations, including de novo mutations in DNM1 in five individuals and de novo mutations in GABBR2, FASN, and RYR3 in two individuals each. Unlike previous studies, this cohort is sufficiently large to show a significant excess of de novo mutations in epileptic encephalopathy probands compared to the general population using a likelihood analysis (p = 8.2 × 10(-4)), supporting a prominent role for de novo mutations in epileptic encephalopathies. We bring statistical evidence that mutations in DNM1 cause epileptic encephalopathy, find suggestive evidence for a role of three additional genes, and show that at least 12% of analyzed individuals have an identifiable causal de novo mutation. Strikingly, 75% of mutations in these probands are predicted to disrupt a protein involved in regulating synaptic transmission, and there is a significant enrichment of de novo mutations in genes in this pathway in the entire cohort as well. These findings emphasize an important role for synaptic dysregulation in epileptic encephalopathies, above and beyond that caused by ion channel dysfunction.

Published
2014

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

Author

May, Patrick, Girard, Simon, Harrer, Merle, Bobbili, Dheeraj R, Schubert, Julian, Wolking, Stefan, Becker, Felicitas, 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, Dennis, 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, De Jonghe, Peter, Sisodiya, Sanjay M, Nabbout, Rima, Franceschetti, Silvana, Coppola, Antonietta, Vari, Maria S, Kasteleijn-Nolst Trenité, Dorothée, Baykan, Betul, Ozbek, Ugur, Bebek, Nerses, Klein, Karl M, Rosenow, Felix, Nguyen, Dang K, Dubeau, François, Carmant, Lionel, Lortie, Anne, Desbiens, Richard, Clément, Jean-François, Cieuta-Walti, Cécile, Sills, Graeme J, Auce, Pauls, 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, Arfan Ikram, M, Uitterlinden, André G, Avanzini, Giuliano, Schorge, Stephanie, Petrou, Steven, Mantegazza, Massimo, Sander, Thomas, 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, 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, Sonsma, Anja C.M., Jonghe, Peter De, and Ikram, M Arfan

Published
2018
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19. Effects of Levetiracetam and Sulthiame on EEG in benign epilepsy with centrotemporal spikes: A randomized controlled trial

Author

Tacke, Moritz, Borggraefe, Ingo, Gerstl, Lucia, Heinen, Florian, Vill, Katharina, Bonfert, Michaela, Bast, Thomas, Neubauer, Bernd Axel, Baumeister, Friedrich, Baethmann, Martina, Bentele, Karl, Blank, Christian, Blank, Harald M., Bode, Harald, Bosch, Friedrich, Brandl, Ulrich, Brockmann, Knut, Dahlem, Peter, Ernst, Jan-Peter, Feldmann, Evemarie, Fiedler, Andreas, Gerigk, Michael, Heß, Soeren, Hikel, Christiane, Hoffmann, Hans-Georg, Kieslich, Matthias, Klepper, Joerg, Kluger, Gerhard, Koch, Hartmut, Koch, Walter, Korinthenberg, Rudolf, Krois, Ilona, Kühne, Hermann, Kurlemann, Gerhard, Mandl, Michaela, Mause, Ulrike, Navratil, Peter, Opp, Joachim, Penzien, Johann, Prietsch, Viola, Quattländer, Axel, Rating, Dietz, Schara, Ulrike, Shamdeen, Mohammed G., Sprinz, Andreas, Wendker-Magrabi, Hildegard, Stephani, Ulrich, Muhle, Hiltrud, Straßburg, Hans-Michael, Töpke, Bärbel, Trollmann, Regina, Tuschen-Hofstätter, Elisabeth, Waltz, Stephan, Weber, Gabriele, Wien, Frank U., Wolff, Markus, Polster, Tilman, Freitag, Hedwig, Sönmez, Ötzcam, Reinhardt, Klaus, Traus, Marion, and Hoovey, Zeecam

Published
2018
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20. TANGO2: expanding the clinical phenotype and spectrum of pathogenic variants

Author

Dines, Jennifer N., Golden-Grant, Katie, LaCroix, Amy, Muir, Alison M., Cintrón, Dianne Laboy, McWalter, Kirsty, Cho, Megan T., Sun, Angela, Merritt, J. Lawrence, Thies, Jenny, Niyazov, Dmitriy, Burton, Barbara, Kim, Katherine, Fleming, Leah, Westman, Rachel, Karachunski, Peter, Dalton, Joline, Basinger, Alice, Ficicioglu, Can, Helbig, Ingo, Pendziwiat, Manuela, Muhle, Hiltrud, Helbig, Katherine L., Caliebe, Almuth, Santer, René, Becker, Kolja, Suchy, Sharon, Douglas, Ganka, Millan, Francisca, Begtrup, Amber, Monaghan, Kristin G., and Mefford, Heather C.

Published
2019
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22. KCNT2-related disorders: phenotypes, functional and pharmacological properties

Author

Cioclu, Maria Cristina, Mosca, Ilaria, Ambrosino, Paolo, Puzo, Deborah, Bayat, Allan, Wortmann, Saskia B, Koch, Johannes, Strehlow, Vincent, Shirai, Kentaro, Matsumoto, Naomichi, Sanders, Stephan J, Michaud, Vincent, Legendre, Marine, Riva, Antonella, Striano, Pasquale, Muhle, Hiltrud, Pendziwiat, Manuela, Lesca, Gaetan, Mangano, Giuseppe Donato, Nardello, Rosaria, Lemke, Johannes R, Møller, Rikke S, Soldovieri, Maria Virginia, Rubboli, Guido, Taglialatela, Maurizio, Cioclu, Maria Cristina, Mosca, Ilaria, Ambrosino, Paolo, Puzo, Deborah, Bayat, Allan, Wortmann, Saskia B, Koch, Johanne, Strehlow, Vincent, Shirai, Kentaro, Matsumoto, Naomichi, Sanders, Stephan J, Michaud, Vincent, Legendre, Marine, Riva, Antonella, Striano, Pasquale, Muhle, Hiltrud, Pendziwiat, Manuela, Lesca, Gaetan, Mangano, Giuseppe Donato, Nardello, Rosaria, Lemke, Johannes R, Møller, Rikke S, Soldovieri, Maria Virginia, Rubboli, Guido, and Taglialatela, Maurizio

Abstract

Objective: Pathogenic variants in KCNT2 are rare causes of developmental epileptic encephalopathy (DEE). We herein describe the phenotypic and genetic features of patients with KCNT2-related DEE, and the in vitro functional and pharmacological properties of KCNT2 channels carrying fourteen novel or previously untested variants. Methods: 25 patients harbouring KCNT2 variants were investigated: 12 were identified through an international collaborative network, 13 were retrieved from the literature. Clinical data were collected and included in a standardized phenotyping sheet. Novel variants were detected using exome sequencing and classified using ACMG criteria. Functional and pharmacological studies were performed by whole-cell electrophysiology in HEK-293 cells. Results: The phenotypic spectrum encompassed: a) Intellectual disability/Developmental delay (21/22 individuals with available information), ranging from mild to severe/profound; b) epilepsy (15/25); c) neurological impairment, with altered muscle tone (14/22); d) dysmorphisms (13/20). Nineteen pathogenic KCNT2 variants were found (nine new, ten reported previously): 16 missense, one in-frame deletion of a single amino acid, one nonsense, and one frameshift. Among tested variants, eight showed gain-of-function (GoF), and six loss-of-function (LoF) features when expressed heterologously in vitro. Quinidine and fluoxetine blocked all GoF variants, whereas loxapine and riluzole activated some LoF variants while blocking others. Interpretation: We expanded the phenotypic and genotypic spectrum of KCNT2-related disorders, highlighting novel genotype-phenotype associations. Pathogenic KCNT2 variants cause GoF or LoF in vitro phenotypes, and each shows a unique pharmacological profile, suggesting the need for in vitro functional and pharmacological investigation to enable targeted therapies based on the molecular phenotype. This article is protected by copyright. All rights reserved.

Published
2023

23. De novo variants in neurodevelopmental disorders with epilepsy

Author

Heyne, Henrike O., Singh, Tarjinder, Stamberger, Hannah, Abou Jamra, Rami, Caglayan, Hande, Craiu, Dana, De Jonghe, Peter, Guerrini, Renzo, Helbig, Katherine L., Koeleman, Bobby P. C., Kosmicki, Jack A., Linnankivi, Tarja, May, Patrick, Muhle, Hiltrud, Møller, Rikke S., Neubauer, Bernd A., Palotie, Aarno, Pendziwiat, Manuela, Striano, Pasquale, Tang, Sha, Wu, Sitao, EuroEPINOMICS RES Consortium, Poduri, Annapurna, Weber, Yvonne G., Weckhuysen, Sarah, Sisodiya, Sanjay M., Daly, Mark J., Helbig, Ingo, Lal, Dennis, and Lemke, Johannes R.

Published
2018
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24. KCNT2-Related Disorders:Phenotypes, Functional, and Pharmacological Properties

Author

Cioclu, Maria Cristina, Mosca, Ilaria, Ambrosino, Paolo, Puzo, Deborah, Bayat, Allan, Wortmann, Saskia B., Koch, Johannes, Strehlow, Vincent, Shirai, Kentaro, Matsumoto, Naomichi, Sanders, Stephan J., Michaud, Vincent, Legendre, Marine, Riva, Antonella, Striano, Pasquale, Muhle, Hiltrud, Pendziwiat, Manuela, Lesca, Gaetan, Mangano, Giuseppe Donato, Nardello, Rosaria, Lemke, Johannes R., Møller, Rikke S., Soldovieri, Maria Virginia, Rubboli, Guido, Taglialatela, Maurizio, Cioclu, Maria Cristina, Mosca, Ilaria, Ambrosino, Paolo, Puzo, Deborah, Bayat, Allan, Wortmann, Saskia B., Koch, Johannes, Strehlow, Vincent, Shirai, Kentaro, Matsumoto, Naomichi, Sanders, Stephan J., Michaud, Vincent, Legendre, Marine, Riva, Antonella, Striano, Pasquale, Muhle, Hiltrud, Pendziwiat, Manuela, Lesca, Gaetan, Mangano, Giuseppe Donato, Nardello, Rosaria, Lemke, Johannes R., Møller, Rikke S., Soldovieri, Maria Virginia, Rubboli, Guido, and Taglialatela, Maurizio

Abstract

Objective Pathogenic variants in KCNT2 are rare causes of developmental epileptic encephalopathy (DEE). We herein describe the phenotypic and genetic features of patients with KCNT2-related DEE, and the in vitro functional and pharmacological properties of KCNT2 channels carrying 14 novel or previously untested variants. Methods Twenty-five patients harboring KCNT2 variants were investigated: 12 were identified through an international collaborative network, 13 were retrieved from the literature. Clinical data were collected and included in a standardized phenotyping sheet. Novel variants were detected using exome sequencing and classified using ACMG criteria. Functional and pharmacological studies were performed by whole-cell electrophysiology in HEK-293 and SH-SY5Y cells. Results The phenotypic spectrum encompassed: (a) intellectual disability/developmental delay (21/22 individuals with available information), ranging from mild to severe/profound; (b) epilepsy (15/25); (c) neurological impairment, with altered muscle tone (14/22); (d) dysmorphisms (13/20). Nineteen pathogenic KCNT2 variants were found (9 new, 10 reported previously): 16 missense, 1 in-frame deletion of a single amino acid, 1 nonsense, and 1 frameshift. Among tested variants, 8 showed gain-of-function (GoF), and 6 loss-of-function (LoF) features when expressed heterologously in vitro. Quinidine and fluoxetine blocked all GoF variants, whereas loxapine and riluzole activated some LoF variants while blocking others. Interpretation We expanded the phenotypic and genotypic spectrum of KCNT2-related disorders, highlighting novel genotype–phenotype associations. Pathogenic KCNT2 variants cause GoF or LoF in vitro phenotypes, and each shows a unique pharmacological profile, suggesting the need for in vitro functional and pharmacological investigation to enable targeted therapies based on the molecular phenotype. ANN NEUROL 2023, Objective: Pathogenic variants in KCNT2 are rare causes of developmental epileptic encephalopathy (DEE). We herein describe the phenotypic and genetic features of patients with KCNT2-related DEE, and the in vitro functional and pharmacological properties of KCNT2 channels carrying 14 novel or previously untested variants. Methods: Twenty-five patients harboring KCNT2 variants were investigated: 12 were identified through an international collaborative network, 13 were retrieved from the literature. Clinical data were collected and included in a standardized phenotyping sheet. Novel variants were detected using exome sequencing and classified using ACMG criteria. Functional and pharmacological studies were performed by whole-cell electrophysiology in HEK-293 and SH-SY5Y cells. Results: The phenotypic spectrum encompassed: (a) intellectual disability/developmental delay (21/22 individuals with available information), ranging from mild to severe/profound; (b) epilepsy (15/25); (c) neurological impairment, with altered muscle tone (14/22); (d) dysmorphisms (13/20). Nineteen pathogenic KCNT2 variants were found (9 new, 10 reported previously): 16 missense, 1 in-frame deletion of a single amino acid, 1 nonsense, and 1 frameshift. Among tested variants, 8 showed gain-of-function (GoF), and 6 loss-of-function (LoF) features when expressed heterologously in vitro. Quinidine and fluoxetine blocked all GoF variants, whereas loxapine and riluzole activated some LoF variants while blocking others. Interpretation: We expanded the phenotypic and genotypic spectrum of KCNT2-related disorders, highlighting novel genotype–phenotype associations. Pathogenic KCNT2 variants cause GoF or LoF in vitro phenotypes, and each shows a unique pharmacological profile, suggesting the need for in vitro functional and pharmacological investigation to enable targeted therapies based on the molecular phenotype. ANN NEUROL 2023.

Published
2023

25. Clinical spectrum of STX1B-related epileptic disorders

Author

Wolking, Stefan, May, Patrick, Mei, Davide, Møller, Rikke S., Balestrini, Simona, Helbig, Katherine L., Altuzarra, Cecilia Desmettre, Chatron, Nicolas, Kaiwar, Charu, Stöhr, Katharina, Widdess-Walsh, Peter, Mendelsohn, Bryce A., Numis, Adam, Cilio, Maria R., Van Paesschen, Wim, Svendsen, Lene L., Oates, Stephanie, Hughes, Elaine, Goyal, Sushma, Brown, Kathleen, Sifuentes Saenz, Margarita, Dorn, Thomas, Muhle, Hiltrud, Pagnamenta, Alistair T., Vavoulis, Dimitris V., Knight, Samantha J.L., Taylor, Jenny C., Canevini, Maria Paola, Darra, Francesca, Gavrilova, Ralitza H., Powis, Zöe, Tang, Shan, Marquetand, Justus, Armstrong, Martin, McHale, Duncan, Klee, Eric W., Kluger, Gerhard J., Lowenstein, Daniel H., Weckhuysen, Sarah, Pal, Deb K., Helbig, Ingo, Guerrini, Renzo, Thomas, Rhys H., Rees, Mark I., Lesca, Gaetan, Sisodiya, Sanjay M., Weber, Yvonne G., Lal, Dennis, Marini, Carla, Lerche, Holger, and Schubert, Julian

Published
2019
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27. Spectrum of Phenotypic, Genetic, and Functional Characteristics in Epilepsy Patients With KCNC2 Pathogenic Variants 10.1212/WNL.0000000000200660

Author

Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], Fonds National de la Recherche - FnR [sponsor], Schwarz, Niklas, Seiffert, Simone, Pendziwiat, Manuela, Rademacher, Annika Verena, BrÃ\textonequarternger, Tobias, Hedrich, Ulrike B. S., Augustijn, Paul B., Baier, Hartmut, Bayat, Allan, Bisulli, Francesca, Buono, Russell J., Bruria, Ben Zeev, Doyle, Michael G., Guerrini, Renzo, Heimer, Gali, Iacomino, Michele, Kearney, Hugh, Klein, Karl Martin, Kousiappa, Ioanna, Kunz, Wolfram S., Lerche, Holger, Licchetta, Laura, Lohmann, Ebba, Minardi, Raffaella, McDonald, Marie, Montgomery, Sarah, Mulahasanovic, Leijla, Oegema, Renske, Ortal, Barel, Papacostas, Savvas S., Ragona, Francesca, Granata, Tiziana, Reif, Phillip S., Rosenow, Felix, Rothschild, Annick, Scudieri, Paolo, Striano, Pasquale, Tinuper, Paolo, Tanteles, George A., Vetro, Annalisa, Zahnert, Felix, Goldberg, Ethan M., Zara, Federico, Lal, Dennis, May, Patrick, Muhle, Hiltrud, Helbig, Ingo, Weber, Yvonne, Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], Fonds National de la Recherche - FnR [sponsor], Schwarz, Niklas, Seiffert, Simone, Pendziwiat, Manuela, Rademacher, Annika Verena, BrÃ\textonequarternger, Tobias, Hedrich, Ulrike B. S., Augustijn, Paul B., Baier, Hartmut, Bayat, Allan, Bisulli, Francesca, Buono, Russell J., Bruria, Ben Zeev, Doyle, Michael G., Guerrini, Renzo, Heimer, Gali, Iacomino, Michele, Kearney, Hugh, Klein, Karl Martin, Kousiappa, Ioanna, Kunz, Wolfram S., Lerche, Holger, Licchetta, Laura, Lohmann, Ebba, Minardi, Raffaella, McDonald, Marie, Montgomery, Sarah, Mulahasanovic, Leijla, Oegema, Renske, Ortal, Barel, Papacostas, Savvas S., Ragona, Francesca, Granata, Tiziana, Reif, Phillip S., Rosenow, Felix, Rothschild, Annick, Scudieri, Paolo, Striano, Pasquale, Tinuper, Paolo, Tanteles, George A., Vetro, Annalisa, Zahnert, Felix, Goldberg, Ethan M., Zara, Federico, Lal, Dennis, May, Patrick, Muhle, Hiltrud, Helbig, Ingo, and Weber, Yvonne

Abstract

Background: KCNC2 encodes Kv3.2, a member of the Shaw-related (Kv3) voltage-gated potassium channel subfamily, which is important for sustained high-frequency firing and optimized energy efficiency of action potentials in the brain. The objective of this study was to analyse the clinical phenotype, genetic background, and biophysical function of disease-associated Kv3.2 variants.Methods: Individuals with KCNC2 variants detected by exome sequencing were selected for clinical, further genetic, and functional analysis. Cases were referred through clinical and research collaborations. Selected de novo variants were examined electrophysiologically in Xenopus laevis oocytes.Results: We identified novel KCNC2 variants in 18 patients with various forms of epilepsy including genetic generalized epilepsy (GGE), developmental and epileptic encephalopathy (DEE) including early-onset absence epilepsy (EOAE), focal epilepsy (FE), and myoclonic-atonic epilepsy (MAE). 10/18 variants were de novo and 8/18 variants were classified as modifying variants. 8 drug responsive cases became seizure-free using valproic acid as monotherapy or in combination including severe DEE cases. Functional analysis of four variants demonstrated gain-of-function in three severely affected DEE cases and loss-of-function in one case with a milder phenotype (GGE) as the underlying pathomechanisms.Conclusion: These findings implicate KCNC2 as a novel causative gene for epilepsy and emphasize the critical role of KV3.2 in the regulation of brain excitability.

Published
2022

28. Spectrum of Phenotypic, Genetic, and Functional Characteristics in Patients With Epilepsy With KCNC2 Pathogenic Variants

Author

Schwarz, Niklas, Seiffert, Simone, Pendziwiat, Manuela, Rademacher, Annika Verena, Brunger, Tobias, Hedrich, Ulrike B. S., Augustijn, Paul B., Baier, Hartmut, Bayat, Allan, Bisulli, Francesca, Buono, Russell J., Bruria, Ben Zeev, Doyle, Michael G., Guerrini, Renzo, Heimer, Gali, Iacomino, Michele, Kearney, Hugh, Klein, Karl Martin, Kousiappa, Ioanna, Kunz, Wolfram S., Lerche, Holger, Licchetta, Laura, Lohmann, Ebba, Minardi, Raffaella, McDonald, Marie, Montgomery, Sarah, Mulahasanovic, Lejla, Oegema, Renske, Ortal, Barel, Papacostas, Savvas S., Ragona, Francesca, Granata, Tiziana, Reif, Phillip S., Rosenow, Felix, Rothschild, Annick, Scudieri, Paolo, Striano, Pasquale, Tinuper, Paolo, Tanteles, George A., Vetro, Annalisa, Zahnert, Felix, Goldberg, Ethan M., Zara, Federico, Lal, Dennis, May, Patrick, Muhle, Hiltrud, Helbig, Ingo, Weber, Yvonne, Schwarz, Niklas, Seiffert, Simone, Pendziwiat, Manuela, Rademacher, Annika Verena, Brunger, Tobias, Hedrich, Ulrike B. S., Augustijn, Paul B., Baier, Hartmut, Bayat, Allan, Bisulli, Francesca, Buono, Russell J., Bruria, Ben Zeev, Doyle, Michael G., Guerrini, Renzo, Heimer, Gali, Iacomino, Michele, Kearney, Hugh, Klein, Karl Martin, Kousiappa, Ioanna, Kunz, Wolfram S., Lerche, Holger, Licchetta, Laura, Lohmann, Ebba, Minardi, Raffaella, McDonald, Marie, Montgomery, Sarah, Mulahasanovic, Lejla, Oegema, Renske, Ortal, Barel, Papacostas, Savvas S., Ragona, Francesca, Granata, Tiziana, Reif, Phillip S., Rosenow, Felix, Rothschild, Annick, Scudieri, Paolo, Striano, Pasquale, Tinuper, Paolo, Tanteles, George A., Vetro, Annalisa, Zahnert, Felix, Goldberg, Ethan M., Zara, Federico, Lal, Dennis, May, Patrick, Muhle, Hiltrud, Helbig, Ingo, and Weber, Yvonne

Abstract

Background and Objectives KCNC2 encodes Kv3.2, a member of the Shaw-related (Kv3) voltage-gated potassium channel subfamily, which is important for sustained high-frequency firing and optimized energy efficiency of action potentials in the brain. The objective of this study was to analyze the clinical phenotype, genetic background, and biophysical function of disease-associated Kv3.2 variants. Methods Individuals with KCNC2 variants detected by exome sequencing were selected for clinical, further genetic, and functional analysis. Cases were referred through clinical and research collaborations. Selected de novo variants were examined electrophysiologically in Xenopus laevis oocytes. Results We identified novel KCNC2 variants in 18 patients with various forms of epilepsy, including genetic generalized epilepsy (GGE), developmental and epileptic encephalopathy (DEE) including early-onset absence epilepsy, focal epilepsy, and myoclonic-atonic epilepsy. Of the 18 variants, 10 were de novo and 8 were classified as modifying variants. Eight drug-responsive patients became seizure-free using valproic acid as monotherapy or in combination, including severe DEE cases. Functional analysis of 4 variants demonstrated gain of function in 3 severely affected DEE cases and loss of function in 1 case with a milder phenotype (GGE) as the underlying pathomechanisms. Discussion These findings implicate KCNC2 as a novel causative gene for epilepsy and emphasize the critical role of K(V)3.2 in the regulation of brain excitability.

Published
2022

29. Spectrum of Phenotypic, Genetic, and Functional Characteristics in Patients With Epilepsy With KCNC2 Pathogenic Variants.

Author

Genetica Klinische Genetica, Brain, Child Health, Schwarz, Niklas, Seiffert, Simone, Pendziwiat, Manuela, Rademacher, Annika Verena, Brà Nger, Tobias, Hedrich, Ulrike B S, Augustijn, Paul B, Baier, Hartmut, Bayat, Allan, Bisulli, Francesca, Buono, Russell J, Bruria, Ben Zeev, Doyle, Michael G, Guerrini, Renzo, Heimer, Gali, Iacomino, Michele, Kearney, Hugh, Klein, Karl Martin, Kousiappa, Ioanna, Kunz, Wolfram S, Lerche, Holger, Licchetta, Laura, Lohmann, Ebba, Minardi, Raffaella, McDonald, Marie, Montgomery, Sarah, Mulahasanovic, Leijla, Oegema, Renske, Ortal, Barel, Papacostas, Savvas S, Ragona, Francesca, Granata, Tiziana, Reif, Phillip S, Rosenow, Felix, Rothschild, Annick, Scudieri, Paolo, Striano, Pasquale, Tinuper, Paolo, Tanteles, George A, Vetro, Annalisa, Zahnert, Felix, Goldberg, Ethan M, Zara, Federico, Lal, Dennis, May, Patrick, Muhle, Hiltrud, Helbig, Ingo, Weber, Yvonne, Genetica Klinische Genetica, Brain, Child Health, Schwarz, Niklas, Seiffert, Simone, Pendziwiat, Manuela, Rademacher, Annika Verena, Brà Nger, Tobias, Hedrich, Ulrike B S, Augustijn, Paul B, Baier, Hartmut, Bayat, Allan, Bisulli, Francesca, Buono, Russell J, Bruria, Ben Zeev, Doyle, Michael G, Guerrini, Renzo, Heimer, Gali, Iacomino, Michele, Kearney, Hugh, Klein, Karl Martin, Kousiappa, Ioanna, Kunz, Wolfram S, Lerche, Holger, Licchetta, Laura, Lohmann, Ebba, Minardi, Raffaella, McDonald, Marie, Montgomery, Sarah, Mulahasanovic, Leijla, Oegema, Renske, Ortal, Barel, Papacostas, Savvas S, Ragona, Francesca, Granata, Tiziana, Reif, Phillip S, Rosenow, Felix, Rothschild, Annick, Scudieri, Paolo, Striano, Pasquale, Tinuper, Paolo, Tanteles, George A, Vetro, Annalisa, Zahnert, Felix, Goldberg, Ethan M, Zara, Federico, Lal, Dennis, May, Patrick, Muhle, Hiltrud, Helbig, Ingo, and Weber, Yvonne

Published
2022

30. Alterations in the α2δ ligand, thrombospondin‐1, in a rat model of spontaneous absence epilepsy and in patients with idiopathic/genetic generalized epilepsies

Author

Santolini, Ines, Celli, Roberta, Cannella, Milena, Imbriglio, Tiziana, Guiducci, Michela, Parisi, Pasquale, Schubert, Julian, Iacomino, Michele, Zara, Federico, Lerche, Holger, Moyanova, Slavianka, Ngomba, Richard Teke, van Luijtelaar, Gilles, Battaglia, Giuseppe, Bruno, Valeria, Striano, Pasquale, Nicoletti, Ferdinando, Palotie, Aarno, Folkhälsan, Anna‐Elina Lehesjoki, Ruppert, Ann‐Kathrin, Siren, Auli, Koeleman, Bobby, Lal, Dennis, Becker, Felicitas, Caglayan, Hande, Hjalgrim, Helle, Muhle, Hiltrud, Thiele, Holger, Helbig, Ingo, Altmuller, Janine, Jabbari, Kamel, Everett, Kate, May, Patrick, Nurnberg, Peter, Møller, Rikke, Nabbout, Rima, Krause, Roland, Balling, Rudi, Baulac, Stephanie, Sander, Thomas, Kunz, Wolfram, Weber, Yvonne, Bianchi, Amedeo, La Neve, Angela, Coppola, Antonietta, Striano, Salvatore, Capovilla, Giuseppe, Ferlazzo, Edoardo, Bagnasco, Irene, Ferretti, Alessandro, Di Bonaventura, Carlo, Vari, Maria Stella, Pinto, Francesca, Bisulli, Francesca, Tinuper, Paolo, Minetti, Carlo, Belcastro, Vincenzo, Giordano, Lucio, and Gambardella, Antonio

Published
2017
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31. Neurodevelopmental Disorders Caused by De Novo Variants in KCNB1 Genotypes and Phenotypes

Author

de Kovel, Carolien G. F., Syrbe, Steffen, Brilstra, Eva H., Verbeek, Nienke, Kerr, Bronwyn, Dubbs, Holly, Bayat, Allan, Desai, Sonal, Naidu, Sakkubai, Srivastava, Siddharth, Cagaylan, Hande, Yis, Uluc, Saunders, Carol, Rook, Martin, Plugge, Susanna, Muhle, Hiltrud, Afawi, Zaid, Klein, Karl-Martin, Jayaraman, Vijayakumar, Rajagopalan, Ramakrishnan, Goldberg, Ethan, Marsh, Eric, Kessler, Sudha, Bergqvist, Christina, Conlin, Laura K., Krok, Bryan L., Thiffault, Isabelle, Pendziwiat, Manuela, Helbig, Ingo, Polster, Tilman, Borggraefe, Ingo, Lemke, Johannes R., van den Boogaardt, Marie-José, Møller, Rikke S., and Koeleman, Bobby P. C.

Published
2017
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32. Mutations in GABRB3: From febrile seizures to epileptic encephalopathies

Author

Møller, Rikke S., Wuttke, Thomas V., Helbig, Ingo, Marini, Carla, Johannesen, Katrine M., Brilstra, Eva H., Vaher, Ulvi, Borggraefe, Ingo, Talvik, Inga, Talvik, Tiina, Kluger, Gerhard, Francois, Laurence L., Lesca, Gaetan, de Bellescize, Julitta, Blichfeldt, Susanne, Chatron, Nicolas, Holert, Nils, Jacobs, Julia, Swinkels, Marielle, Betzler, Cornelia, Syrbe, Steffen, Nikanorova, Marina, Myers, Candace T., Larsen, Line H.G., Vejzovic, Sabina, Pendziwiat, Manuela, von Spiczak, Sarah, Hopkins, Sarah, Dubbs, Holly, Mang, Yuan, Mukhin, Konstantin, Holthausen, Hans, van Gassen, Koen L., Dahl, Hans A., Tommerup, Niels, Mefford, Heather C., Rubboli, Guido, Guerrini, Renzo, Lemke, Johannes R., Lerche, Holger, Muhle, Hiltrud, and Maljevic, Snezana

Published
2017
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33. Correction: TANGO2: expanding the clinical phenotype and spectrum of pathogenic variants

Author

Dines, Jennifer N., Golden-Grant, Katie, LaCroix, Amy, Muir, Alison M., Cintrón, Dianne Laboy, McWalter, Kirsty, Cho, Megan T., Sun, Angela, Merritt, J. Lawrence, Thies, Jenny, Niyazov, Dmitriy, Burton, Barbara, Kim, Katherine, Fleming, Leah, Westman, Rachel, Karachunski, Peter, Dalton, Joline, Basinger, Alice, Ficicioglu, Can, Helbig, Ingo, Pendziwiat, Manuela, Muhle, Hiltrud, Helbig, Katherine L., Caliebe, Almuth, Santer, René, Becker, Kolja, Suchy, Sharon, Douglas, Ganka, Millan, Francisca, Begtrup, Amber, Monaghan, Kristin G., and Mefford, Heather C.

Published
2019
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34. Spectrum of Phenotypic, Genetic, and Functional Characteristics in Patients With Epilepsy With KCNC2 Pathogenic Variants

Author

Schwarz, Niklas, primary, Seiffert, Simone, additional, Pendziwiat, Manuela, additional, Rademacher, Annika Verena, additional, Brünger, Tobias, additional, Hedrich, Ulrike B.S., additional, Augustijn, Paul B., additional, Baier, Hartmut, additional, Bayat, Allan, additional, Bisulli, Francesca, additional, Buono, Russell J., additional, Bruria, Ben Zeev, additional, Doyle, Michael G., additional, Guerrini, Renzo, additional, Heimer, Gali, additional, Iacomino, Michele, additional, Kearney, Hugh, additional, Klein, Karl Martin, additional, Kousiappa, Ioanna, additional, Kunz, Wolfram S., additional, Lerche, Holger, additional, Licchetta, Laura, additional, Lohmann, Ebba, additional, Minardi, Raffaella, additional, McDonald, Marie, additional, Montgomery, Sarah, additional, Mulahasanovic, Lejla, additional, Oegema, Renske, additional, Ortal, Barel, additional, Papacostas, Savvas S., additional, Ragona, Francesca, additional, Granata, Tiziana, additional, Reif, Phillip S., additional, Rosenow, Felix, additional, Rothschild, Annick, additional, Scudieri, Paolo, additional, Striano, Pasquale, additional, Tinuper, Paolo, additional, Tanteles, George A., additional, Vetro, Annalisa, additional, Zahnert, Felix, additional, Goldberg, Ethan M., additional, Zara, Federico, additional, Lal, Dennis, additional, May, Patrick, additional, Muhle, Hiltrud, additional, Helbig, Ingo, additional, and Weber, Yvonne, additional

Published
2022
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36. The KCNB1 phenotypic and genetic spectrum

Author

Reale, Chiara, Fenger, Christina Duhring, Neu, Axel, Sukno, Sylvie, McKeown, Sarah, Borovikov, Artem, Gorman, Kathleen, Trivisano, Marina, Lo Barco, Tommaso, Krey, Ilona, Navarro, Isabel Maria Moreno, La Selva, Lorita, Bayat, Allan, Bijlsma, Emilia K., Rokkjaer, Mette, Borggrafe, Ingo, Sauders, Carol J., Yis, Uluc, Ram, Dipak, Bierhals, Tatjana, Francannet, Christine, Bonardi, Claudia M., Goldenberg, Alice, Dadali, Elena, Green, Andrew, Cohen, Roni, Muhle, Hiltrud, Beniczky, Sandor, Massingham, Laure, Fusco, Carlo, Specchio, Nicola, Allen, Nicholas M., Cantalupo, Gaetano, Sharkov, Artem, Helbig, Ingo, Gerard, Benedicte, Lessel, Davor, Rubboli, Guido, Moeller, Rikke Steensbjerre, Gardella, Elena, McKeowns, Sarah, Furia, Francesca, Afawi, Zaid, Bernardina, Bernardo Dalla, Campbell, Ww, Fiedler, Barbara, Fontana, Elena, Hall, Ara S., Hoi-Hansen, Christina, Klein, Karl Martin, King, Mary, Lynch, Bryan, Lemke, Johannes, Gaudda, Ama, Nikanorova, Marina, Rahner, Mils, Spagnoli, Carlotta, Banka, Siddarth, and Pendziwiat, Manuela

Published
2021
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37. Four patients with speech delay, seizures and variable corpus callosum thickness sharing a 0.440 Mb deletion in region 1q44 containing the HNRPU gene

Author

Caliebe, Almuth, Kroes, Hester Y., van der Smagt, Jasper J., Martin-Subero, José I., Tönnies, Holger, van ’t Slot, Ruben, Nievelstein, Rutger A.J., Muhle, Hiltrud, Stephani, Ulrich, Alfke, Karsten, Stefanova, Irina, Hellenbroich, Yorck, Gillessen-Kaesbach, Gabriele, Hochstenbach, Ron, Siebert, Reiner, and Poot, Martin

Published
2010
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38. Sub-genic intolerance, ClinVar, and the epilepsies: A whole-exome sequencing study of 29,165 individuals

Author

Motelow, Joshua E., primary, Povysil, Gundula, additional, Dhindsa, Ryan S., additional, Stanley, Kate E., additional, Allen, Andrew S., additional, Feng, Yen-Chen Anne, additional, Howrigan, Daniel P., additional, Abbott, Liam E., additional, Tashman, Katherine, additional, Cerrato, Felecia, additional, Cusick, Caroline, additional, Singh, Tarjinder, additional, Heyne, Henrike, additional, Byrnes, Andrea E., additional, Churchhouse, Claire, additional, Watts, Nick, additional, Solomonson, Matthew, additional, Lal, Dennis, additional, Gupta, Namrata, additional, Neale, Benjamin M., additional, Cavalleri, Gianpiero L., additional, Cossette, Patrick, additional, Cotsapas, Chris, additional, De Jonghe, Peter, additional, Dixon-Salazar, Tracy, additional, Guerrini, Renzo, additional, Hakonarson, Hakon, additional, Heinzen, Erin L., additional, Helbig, Ingo, additional, Kwan, Patrick, additional, Marson, Anthony G., additional, Petrovski, Slavé, additional, Kamalakaran, Sitharthan, additional, Sisodiya, Sanjay M., additional, Stewart, Randy, additional, Weckhuysen, Sarah, additional, Depondt, Chantal, additional, Dlugos, Dennis J., additional, Scheffer, Ingrid E., additional, Striano, Pasquale, additional, Freyer, Catharine, additional, Krause, Roland, additional, May, Patrick, additional, McKenna, Kevin, additional, Regan, Brigid M., additional, Bennett, Caitlin A., additional, Leu, Costin, additional, Leech, Stephanie L., additional, O’Brien, Terence J., additional, Todaro, Marian, additional, Stamberger, Hannah, additional, Andrade, Danielle M., additional, Ali, Quratulain Zulfiqar, additional, Sadoway, Tara R., additional, Krestel, Heinz, additional, Schaller, André, additional, Papacostas, Savvas S., additional, Kousiappa, Ioanna, additional, Tanteles, George A., additional, Christou, Yiolanda, additional, Štěrbová, Katalin, additional, Vlčková, Markéta, additional, Sedláčková, Lucie, additional, Laššuthová, Petra, additional, Klein, Karl Martin, additional, Rosenow, Felix, additional, Reif, Philipp S., additional, Knake, Susanne, additional, Neubauer, Bernd A., additional, Zimprich, Friedrich, additional, Feucht, Martha, additional, Reinthaler, Eva M., additional, Kunz, Wolfram S., additional, Zsurka, Gábor, additional, Surges, Rainer, additional, Baumgartner, Tobias, additional, von Wrede, Randi, additional, Pendziwiat, Manuela, additional, Muhle, Hiltrud, additional, Rademacher, Annika, additional, van Baalen, Andreas, additional, von Spiczak, Sarah, additional, Stephani, Ulrich, additional, Afawi, Zaid, additional, Korczyn, Amos D., additional, Kanaan, Moien, additional, Canavati, Christina, additional, Kurlemann, Gerhard, additional, Müller-Schlüter, Karen, additional, Kluger, Gerhard, additional, Häusler, Martin, additional, Blatt, Ilan, additional, Lemke, Johannes R., additional, Krey, Ilona, additional, Weber, Yvonne G., additional, Wolking, Stefan, additional, Becker, Felicitas, additional, Lauxmann, Stephan, additional, Boßelmann, Christian, additional, Kegele, Josua, additional, Hengsbach, Christian, additional, Rau, Sarah, additional, Steinhoff, Bernhard J., additional, Schulze-Bonhage, Andreas, additional, Borggräfe, Ingo, additional, Schankin, Christoph J., additional, Schubert-Bast, Susanne, additional, Schreiber, Herbert, additional, Mayer, Thomas, additional, Korinthenberg, Rudolf, additional, Brockmann, Knut, additional, Wolff, Markus, additional, Dennig, Dieter, additional, Madeleyn, Rene, additional, Kälviäinen, Reetta, additional, Saarela, Anni, additional, Timonen, Oskari, additional, Linnankivi, Tarja, additional, Lehesjoki, Anna-Elina, additional, Rheims, Sylvain, additional, Lesca, Gaetan, additional, Ryvlin, Philippe, additional, Maillard, Louis, additional, Valton, Luc, additional, Derambure, Philippe, additional, Bartolomei, Fabrice, additional, Hirsch, Edouard, additional, Michel, Véronique, additional, Chassoux, Francine, additional, Rees, Mark I., additional, Chung, Seo-Kyung, additional, Pickrell, William O., additional, Powell, Robert, additional, Baker, Mark D., additional, Fonferko-Shadrach, Beata, additional, Lawthom, Charlotte, additional, Anderson, Joseph, additional, Schneider, Natascha, additional, Balestrini, Simona, additional, Zagaglia, Sara, additional, Braatz, Vera, additional, Johnson, Michael R., additional, Auce, Pauls, additional, Sills, Graeme J., additional, Baum, Larry W., additional, Sham, Pak C., additional, Cherny, Stacey S., additional, Lui, Colin H.T., additional, Delanty, Norman, additional, Doherty, Colin P., additional, Shukralla, Arif, additional, El-Naggar, Hany, additional, Widdess-Walsh, Peter, additional, Barišić, Nina, additional, Canafoglia, Laura, additional, Franceschetti, Silvana, additional, Castellotti, Barbara, additional, Granata, Tiziana, additional, Ragona, Francesca, additional, Zara, Federico, additional, Iacomino, Michele, additional, Riva, Antonella, additional, Madia, Francesca, additional, Vari, Maria Stella, additional, Salpietro, Vincenzo, additional, Scala, Marcello, additional, Mancardi, Maria Margherita, additional, Nobili, Lino, additional, Amadori, Elisabetta, additional, Giacomini, Thea, additional, Bisulli, Francesca, additional, Pippucci, Tommaso, additional, Licchetta, Laura, additional, Minardi, Raffaella, additional, Tinuper, Paolo, additional, Muccioli, Lorenzo, additional, Mostacci, Barbara, additional, Gambardella, Antonio, additional, Labate, Angelo, additional, Annesi, Grazia, additional, Manna, Lorella, additional, Gagliardi, Monica, additional, Parrini, Elena, additional, Mei, Davide, additional, Vetro, Annalisa, additional, Bianchini, Claudia, additional, Montomoli, Martino, additional, Doccini, Viola, additional, Barba, Carmen, additional, Hirose, Shinichi, additional, Ishii, Atsushi, additional, Suzuki, Toshimitsu, additional, Inoue, Yushi, additional, Yamakawa, Kazuhiro, additional, Beydoun, Ahmad, additional, Nasreddine, Wassim, additional, Khoueiry Zgheib, Nathalie, additional, Tumiene, Birute, additional, Utkus, Algirdas, additional, Sadleir, Lynette G., additional, King, Chontelle, additional, Caglayan, S. Hande, additional, Arslan, Mutluay, additional, Yapıcı, Zuhal, additional, Topaloglu, Pınar, additional, Kara, Bulent, additional, Yis, Uluc, additional, Turkdogan, Dilsad, additional, Gundogdu-Eken, Aslı, additional, Bebek, Nerses, additional, Uğur-İşeri, Sibel, additional, Baykan, Betül, additional, Salman, Barış, additional, Haryanyan, Garen, additional, Yücesan, Emrah, additional, Kesim, Yeşim, additional, Özkara, Çiğdem, additional, Tsai, Meng-Han, additional, Ho, Chen-Jui, additional, Lin, Chih-Hsiang, additional, Lin, Kuang-Lin, additional, Chou, I-Jun, additional, Poduri, Annapurna, additional, Shiedley, Beth R., additional, Shain, Catherine, additional, Noebels, Jeffrey L., additional, Goldman, Alicia, additional, Busch, Robyn M., additional, Jehi, Lara, additional, Najm, Imad M., additional, Ferguson, Lisa, additional, Khoury, Jean, additional, Glauser, Tracy A., additional, Clark, Peggy O., additional, Buono, Russell J., additional, Ferraro, Thomas N., additional, Sperling, Michael R., additional, Lo, Warren, additional, Privitera, Michael, additional, French, Jacqueline A., additional, Schachter, Steven, additional, Kuzniecky, Ruben I., additional, Devinsky, Orrin, additional, Hegde, Manu, additional, Greenberg, David A., additional, Ellis, Colin A., additional, Goldberg, Ethan, additional, Helbig, Katherine L., additional, Cosico, Mahgenn, additional, Vaidiswaran, Priya, additional, Fitch, Eryn, additional, Berkovic, Samuel F., additional, Lerche, Holger, additional, Lowenstein, Daniel H., additional, and Goldstein, David B., additional

Published
2021
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39. Distinct gene-set burden patterns underlie common generalized and focal epilepsies

Author

Koko, Mahmoud, primary, Krause, Roland, additional, Sander, Thomas, additional, Bobbili, Dheeraj Reddy, additional, Nothnagel, Michael, additional, May, Patrick, additional, Lerche, Holger, additional, Feng, Yen-Chen Anne, additional, Howrigan, Daniel P, additional, Abbott, Liam E, additional, Tashman, Katherine, additional, Cerrato, Felecia, additional, Singh, Tarjinder, additional, Heyne, Henrike, additional, Byrnes, Andrea, additional, Churchhouse, Claire, additional, Watts, Nick, additional, Solomonson, Matthew, additional, Lal, Dennis, additional, Heinzen, Erin L, additional, Dhindsa, Ryan S, additional, Stanley, Kate E, additional, Cavalleri, Gianpiero L, additional, Hakonarson, Hakon, additional, Helbig, Ingo, additional, Weckhuysen, Sarah, additional, Petrovski, Slavé, additional, Kamalakaran, Sitharthan, additional, Sisodiya, Sanjay M, additional, Cossette, Patrick, additional, Cotsapas, Chris, additional, DeJonghe, Peter, additional, Dixon-Salazar, Tracy, additional, Guerrini, Renzo, additional, Kwan, Patrick, additional, Marson, Anthony G, additional, Stewart, Randy, additional, Depondt, Chantal, additional, Dlugos, Dennis J, additional, Scheffer, Ingrid E, additional, Striano, Pasquale, additional, Freyer, Catharine, additional, McKenna, Kevin, additional, Regan, Brigid M, additional, Bellows, Susannah T, additional, Leu, Costin, additional, Bennett, Caitlin A, additional, Johns, Esther M C, additional, Macdonald, Alexandra, additional, Shilling, Hannah, additional, Burgess, Rosemary, additional, Weckhuysen, Dorien, additional, Bahlo, Melanie, additional, O'Brien, Terence J, additional, Todaro, Marian, additional, Stamberger, Hannah, additional, Andrade, Danielle M, additional, Sadoway, Tara R, additional, Mo, Kelly, additional, Krestel, Heinz, additional, Gallati, Sabina, additional, Papacostas, Savvas S, additional, Kousiappa, Ioanna, additional, Tanteles, George A, additional, Štěrbová, Katalin, additional, Vlčková, Markéta, additional, Sedláčková, Lucie, additional, Laššuthová, Petra, additional, Klein, Karl Martin, additional, Rosenow, Felix, additional, Reif, Philipp S, additional, Knake, Susanne, additional, Kunz, Wolfram S, additional, Zsurka, Gábor, additional, Elger, Christian E, additional, Bauer, Jürgen, additional, Rademacher, Michael, additional, Pendziwiat, Manuela, additional, Muhle, Hiltrud, additional, Rademacher, Annika, additional, vanBaalen, Andreas, additional, vonSpiczak, Sarah, additional, Stephani, Ulrich, additional, Afawi, Zaid, additional, Korczyn, Amos D, additional, Kanaan, Moien, additional, Canavati, Christina, additional, Kurlemann, Gerhard, additional, Müller-Schlüter, Karen, additional, Kluger, Gerhard, additional, Häusler, Martin, additional, Blatt, Ilan, additional, Lemke, Johannes R, additional, Krey, Ilona, additional, Weber, Yvonne G, additional, Wolking, Stefan, additional, Becker, Felicitas, additional, Hengsbach, Christian, additional, Rau, Sarah, additional, Maisch, Ana F, additional, Steinhoff, Bernhard J, additional, Schulze-Bonhage, Andreas, additional, Schubert-Bast, Susanne, additional, Schreiber, Herbert, additional, Borggräfe, Ingo, additional, Schankin, Christoph J, additional, Mayer, Thomas, additional, Korinthenberg, Rudolf, additional, Brockmann, Knut, additional, Dennig, Dieter, additional, Madeleyn, Rene, additional, Kälviäinen, Reetta, additional, Auvinen, Pia, additional, Saarela, Anni, additional, Linnankivi, Tarja, additional, Lehesjoki, Anna-Elina, additional, Rees, Mark I, additional, Chung, Seo-Kyung, additional, Pickrell, William O, additional, Powell, Robert, additional, Schneider, Natascha, additional, Balestrini, Simona, additional, Zagaglia, Sara, additional, Braatz, Vera, additional, Johnson, Michael R, additional, Auce, Pauls, additional, Sills, Graeme J, additional, Baum, Larry W, additional, Sham, Pak C, additional, Cherny, Stacey S, additional, Lui, Colin H T, additional, Barišić, Nina, additional, Delanty, Norman, additional, Doherty, Colin P, additional, Shukralla, Arif, additional, McCormack, Mark, additional, El-Naggar, Hany, additional, Canafoglia, Laura, additional, Franceschetti, Silvana, additional, Castellotti, Barbara, additional, Granata, Tiziana, additional, Zara, Federico, additional, Iacomino, Michele, additional, Madia, Francesca, additional, Vari, Maria Stella, additional, Mancardi, Maria Margherita, additional, Salpietro, Vincenzo, additional, Bisulli, Francesca, additional, Tinuper, Paolo, additional, Licchetta, Laura, additional, Pippucci, Tommaso, additional, Stipa, Carlotta, additional, Minardi, Raffaella, additional, Gambardella, Antonio, additional, Labate, Angelo, additional, Annesi, Grazia, additional, Manna, Lorella, additional, Gagliardi, Monica, additional, Parrini, Elena, additional, Mei, Davide, additional, Vetro, Annalisa, additional, Bianchini, Claudia, additional, Montomoli, Martino, additional, Doccini, Viola, additional, Marini, Carla, additional, Suzuki, Toshimitsu, additional, Inoue, Yushi, additional, Yamakawa, Kazuhiro, additional, Tumiene, Birute, additional, Sadleir, Lynette G, additional, King, Chontelle, additional, Mountier, Emily, additional, Caglayan, Hande S, additional, Arslan, Mutluay, additional, Yapıcı, Zuhal, additional, Yis, Uluc, additional, Topaloglu, Pınar, additional, Kara, Bulent, additional, Turkdogan, Dilsad, additional, Gundogdu-Eken, Aslı, additional, Bebek, Nerses, additional, Uğur-İşeri, Sibel, additional, Baykan, Betül, additional, Salman, Barış, additional, Haryanyan, Garen, additional, Yücesan, Emrah, additional, Kesim, Yeşim, additional, Özkara, Çiğdem, additional, Poduri, Annapurna, additional, Shiedley, Beth R, additional, Shain, Catherine, additional, Buono, Russell J, additional, Ferraro, Thomas N, additional, Sperling, Michael R, additional, Lo, Warren, additional, Privitera, Michael, additional, French, Jacqueline A, additional, Schachter, Steven, additional, Kuzniecky, Ruben I, additional, Devinsky, Orrin, additional, Hegde, Manu, additional, Khankhanian, Pouya, additional, Helbig, Katherine L, additional, Ellis, Colin A, additional, Spalletta, Gianfranco, additional, Piras, Fabrizio, additional, Piras, Federica, additional, Gili, Tommaso, additional, Ciullo, Valentina, additional, Reif, Andreas, additional, McQuillin, Andrew, additional, Bass, Nick, additional, McIntosh, Andrew, additional, Blackwood, Douglas, additional, Johnstone, Mandy, additional, Palotie, Aarno, additional, Pato, Michele T, additional, Pato, Carlos N, additional, Bromet, Evelyn J, additional, Carvalho, Celia Barreto, additional, Achtyes, Eric D, additional, Azevedo, Maria Helena, additional, Kotov, Roman, additional, Lehrer, Douglas S, additional, Malaspina, Dolores, additional, Marder, Stephen R, additional, Medeiros, Helena, additional, Morley, Christopher P, additional, Perkins, Diana O, additional, Sobell, Janet L, additional, Buckley, Peter F, additional, Macciardi, Fabio, additional, Rapaport, Mark H, additional, Knowles, James A, additional, Cohort, Genomic Psychiatry, additional, Fanous, Ayman H, additional, McCarroll, Steven A, additional, Gupta, Namrata, additional, Gabriel, Stacey B, additional, Daly, Mark J, additional, Lander, Eric S, additional, Lowenstein, Daniel H, additional, Goldstein, David B, additional, Berkovic, Samuel F, additional, and Neale, Benjamin M, additional

Published
2021
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40. The role of SLC2A1 mutations in myoclonic astatic epilepsy and absence epilepsy, and the estimated frequency of GLUT1 deficiency syndrome

Author

Larsen, Jan, Johannesen, Katrine Marie, Ek, Jakob, Tang, Shan, Marini, Carla, Blichfeldt, Susanne, Kibæk, Maria, von Spiczak, Sarah, Weckhuysen, Sarah, Frangu, Mimoza, Neubauer, Bernd Axel, Uldall, Peter, Striano, Pasquale, Zara, Federico, Kleiss, Rebecca, Simpson, Michael, Muhle, Hiltrud, Nikanorova, Marina, Jepsen, Birgit, Tommerup, Niels, Stephani, Ulrich, Guerrini, Renzo, Duno, Morten, Hjalgrim, Helle, Pal, Deb, Helbig, Ingo, and Møller, Rikke Steensbjerre

Published
2015
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41. Recessive mutations in SLC13A5 result in a loss of citrate transport and cause neonatal epilepsy, developmental delay and teeth hypoplasia

Author

Hardies, Katia, de Kovel, Carolien G. F., Weckhuysen, Sarah, Asselbergh, Bob, Geuens, Thomas, Deconinck, Tine, Azmi, Abdelkrim, May, Patrick, Brilstra, Eva, Becker, Felicitas, Barisic, Nina, Craiu, Dana, Braun, Kees P.J., Lal, Dennis, Thiele, Holger, Schubert, Julian, Weber, Yvonne, van ‘t Slot, Ruben, Nürnberg, Peter, Balling, Rudi, Timmerman, Vincent, Lerche, Holger, Maudsley, Stuart, Helbig, Ingo, Suls, Arvid, Koeleman, Bobby P.C., De Jonghe, Peter, Afawi, Zaid, Baulac, Stéphanie, Caglayan, Hande, Lopez, Rosa Guerrero, Guerrini, Renzo, Hjalgrim, Helle, Jähn, Johanna, Klein, Karl Martin, Leguern, Eric, Lemke, Johannes, Marini, Carla, Muhle, Hiltrud, Rosenow, Felix, Serratosa, Jose, Štěrbová, Katalin, Moller, Rikke S., Striano, Pasquale, and Zara, Federico

Published
2015
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42. Galanin pathogenic mutations in temporal lobe epilepsy

Author

Guipponi, Michel, Chentouf, Amina, Webling, Kristin E.B., Freimann, Krista, Crespel, Arielle, Nobile, Carlo, Lemke, Johannes R., Hansen, Jörg, Dorn, Thomas, Lesca, Gaetan, Ryvlin, Philippe, Hirsch, Edouard, Rudolf, Gabrielle, Rosenberg, Dominique Sarah, Weber, Yvonne, Becker, Felicitas, Helbig, Ingo, Muhle, Hiltrud, Salzmann, Annick, Chaouch, Malika, Oubaiche, Mohand Laid, Ziglio, Serena, Gehrig, Corinne, Santoni, Federico, Pizzato, Massimo, Langel, Ülo, and Antonarakis, Stylianos E.

Published
2015
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43. Rare variants in γ-aminobutyric acid type A receptor genes in rolandic epilepsy and related syndromes

Author

Reinthaler, Eva M., Dejanovic, Borislav, Lal, Dennis, Semtner, Marcus, Merkler, Yvonne, Reinhold, Annika, Pittrich, Dorothea A., Hotzy, Christoph, Feucht, Martha, Steinböck, Hannelore, Gruber-Sedlmayr, Ursula, Ronen, Gabriel M., Neophytou, Birgit, Geldner, Julia, Haberlandt, Edda, Muhle, Hiltrud, Ikram, Arfan M., van Duijn, Cornelia M., Uitterlinden, Andre G., Hofman, Albert, Altmüller, Janine, Kawalia, Amit, Toliat, Mohammad R., Nürnberg, Peter, Lerche, Holger, Nothnagel, Michael, Thiele, Holger, Sander, Thomas, Meier, Jochen C., Schwarz, Günter, Neubauer, Bernd A., and Zimprich, Fritz

Published
2015
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44. CHD2 variants are a risk factor for photosensitivity in epilepsy

Author

Galizia, Elizabeth C., Myers, Candace T., Leu, Costin, de Kovel, Carolien G. F., Afrikanova, Tatiana, Cordero-Maldonado, Maria Lorena, Martins, Teresa G., Jacmin, Maxime, Drury, Suzanne, Krishna Chinthapalli, V., Muhle, Hiltrud, Pendziwiat, Manuela, Sander, Thomas, Ruppert, Ann-Kathrin, Møller, Rikke S., Thiele, Holger, Krause, Roland, Schubert, Julian, Lehesjoki, Anna-Elina, Nürnberg, Peter, Lerche, Holger, Palotie, Aarno, Coppola, Antonietta, Striano, Salvatore, Gaudio, Luigi Del, Boustred, Christopher, Schneider, Amy L., Lench, Nicholas, Jocic-Jakubi, Bosanka, Covanis, Athanasios, Capovilla, Giuseppe, Veggiotti, Pierangelo, Piccioli, Marta, Parisi, Pasquale, Cantonetti, Laura, Sadleir, Lynette G., Mullen, Saul A., Berkovic, Samuel F., Stephani, Ulrich, Helbig, Ingo, Crawford, Alexander D., Esguerra, Camila V., Kasteleijn-Nolst Trenité, Dorothee G. A., Koeleman, Bobby P. C., Mefford, Heather C., Scheffer, Ingrid E., and Sisodiya, Sanjay M.

Published
2015
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45. Recessive loss-of-function mutations in AP4S1 cause mild fever-sensitive seizures, developmental delay and spastic paraplegia through loss of AP-4 complex assembly

Author

Hardies, Katia, May, Patrick, Djémié, Tania, Tarta-Arsene, Oana, Deconinck, Tine, Craiu, Dana, Helbig, Ingo, Suls, Arvid, Balling, Rudy, Weckhuysen, Sarah, De Jonghe, Peter, Hirst, Jennifer, Afawi, Zaid, Barisic, Nina, Baulac, Stéphanie, Caglayan, Hande, Depienne, Christel, De Kovel, Carolien G.F., Dimova, Petia, Guerrero-López, Rosa, Guerrini, Renzo, Hjalgrim, Helle, Hoffman-Zacharska, Dorota, Jahn, Johanna, Klein, Karl Martin, Koeleman, Bobby P.C., Leguern, Eric, Lehesjoki, Anna-Elina, Lemke, Johannes, Lerche, Holger, Marini, Carla, Muhle, Hiltrud, Rosenow, Felix, Serratosa, Jose M., Møller, Rikke S., Stephani, Ulrich, Striano, Pasquale, Talvik, Tiina, Von Spiczak, Sarah, Weber, Yvonne, and Zara, Federico

Published
2015
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48. De novo FZR1 loss-of-function variants cause developmental and epileptic encephalopathies

Author

Manivannan, Sathiya N., Roovers, Jolien, Smal, Noor, Myers, Candace T., Turkdogan, Dilsad, Roelens, Filip, Kanca, Oguz, Chung, Hyung-Lok, Scholz, Tasja, Hermann, Katharina, Bierhals, Tatjana, Caglayan, Hande S., Stamberger, Hannah, Craiu, Dana, Davila, Carol, Helbig, Ingo, Guerrini, Renzo, Lehesjoki, Anna-Elina, Marini, Carla, Muhle, Hiltrud, Møller, Rikke S., Neubauer, Bernd, Pal, Deb, Sterbova, Katalin, Striano, Pasquale, Talvik, Tiina, von Spiczak, Sarah, Weber, Yvonne, Hoffman-Zacharska, Dorota, Mefford, Heather, De Jonghe, Peter, Yamamoto, Shinya, Weckhuysen, Sarah, Bellen, Hugo J., and MAE working group of EuroEPINOMICS RES Consortium

Subjects
Genetics, Microcephaly, Ataxia, Epilepsy, Seizure types, Biology, medicine.disease, Cdh1 Proteins, Phenotype, Loss of Function Mutation, Intellectual disability, medicine, Missense mutation, Humans, Epilepsy, Generalized, Original Article, Neurology (clinical), Human medicine, Generalized epilepsy, Allele, medicine.symptom, Child, Loss function
Abstract

FZR1, which encodes the Cdh1 subunit of the anaphase-promoting complex, plays an important role in neurodevelopment by regulating the cell cycle and by its multiple post-mitotic functions in neurons. In this study, evaluation of 250 unrelated patients with developmental and epileptic encephalopathies and a connection on GeneMatcher led to the identification of three de novo missense variants in FZR1. Whole-exome sequencing in 39 patient–parent trios and subsequent targeted sequencing in an additional cohort of 211 patients was performed to identify novel genes involved in developmental and epileptic encephalopathy. Functional studies in Drosophila were performed using three different mutant alleles of the Drosophila homologue of FZR1 fzr. All three individuals carrying de novo variants in FZR1 had childhood-onset generalized epilepsy, intellectual disability, mild ataxia and normal head circumference. Two individuals were diagnosed with the developmental and epileptic encephalopathy subtype myoclonic atonic epilepsy. We provide genetic-association testing using two independent statistical tests to support FZR1 association with developmental and epileptic encephalopathies. Further, we provide functional evidence that the missense variants are loss-of-function alleles using Drosophila neurodevelopment assays. Using three fly mutant alleles of the Drosophila homologue fzr and overexpression studies, we show that patient variants can affect proper neurodevelopment. With the recent report of a patient with neonatal-onset with microcephaly who also carries a de novo FZR1 missense variant, our study consolidates the relationship between FZR1 and developmental and epileptic encephalopathy and expands the associated phenotype. We conclude that heterozygous loss-of-function of FZR1 leads to developmental and epileptic encephalopathies associated with a spectrum of neonatal to childhood-onset seizure types, developmental delay and mild ataxia. Microcephaly can be present but is not an essential feature of FZR1-encephalopathy. In summary, our approach of targeted sequencing using novel gene candidates and functional testing in Drosophila will help solve undiagnosed myoclonic atonic epilepsy or developmental and epileptic encephalopathy cases.

Published
2021

49. Heterozygous variants in KCNC2 cause a broad spectrum of epilepsy phenotypes associated with characteristic functional alterations 2021.05.21.21257099

Author

Schwarz, Niklas, Seiffert, Simone, Pendziwiat, Manuela, Rademacher, Annika, Brünger, Tobias, Hedrich, Ulrike B. S., Augustijn, Paul B., Baier, Hartmut, Bayat, Allan, Bisulli, Francesca, Buono, Russell J., Bruria, Ben Zeev, Doyle, Michael G., Guerrini, Renzo, Heimer, Gali, Iacomino, Michele, Kearney, Hugh, Klein, Karl Martin, Kousiappa, Ioanna, Kunz, Wolfram S., Lerche, Holger, Licchetta, Laura, Lohmann, Ebba, Minardi, Raffaella, McDonald, Marie, Montgomery, Sarah, Mulahasanovic, Lejla, Oegema, Renske, Ortal, Barel, Papacostas, Savvas S., Ragona, Francesca, Granata, Tiziana, Reif, Philipp S., Rosenow, Felix, Rothschild, Annick, Scudieri, Paolo, Striano, Pasquale, Tinuper, Paolo, Tanteles, George A., Vetro, Annalisa, Zahnert, Felix, Zara, Federico, Lal, Dennis, May, Patrick, Muhle, Hiltrud, Helbig, Ingo, Weber, Yvonne, BMBF Treat-ION grant (01GM1907). [sponsor], and Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center]

Subjects
KCNC2, Neurologie [D14] [Sciences de la santé humaine], Neurology [D14] [Human health sciences], epilepsy, Genetics & genetic processes [F10] [Life sciences], Génétique & processus génétiques [F10] [Sciences du vivant], potassium channel
Abstract

Background KCNC2 encodes a member of the shaw-related voltage-gated potassium channel family (KV3.2), which are important for sustained high-frequency firing and optimized energy efficiency of action potentials in the brain.Methods Individuals with KCNC2 variants detected by exome sequencing were selected for clinical, further genetic and functional analysis. The cases were referred through clinical and research collaborations in our study. Four de novo variants were examined electrophysiologically in Xenopus laevis oocytes.Results We identified novel KCNC2 variants in 27 patients with various forms of epilepsy. Functional analysis demonstrated gain-of-function in severe and loss-of-function in milder phenotypes as the underlying pathomechanisms with specific response to valproic acid.Conclusion These findings implicate KCNC2 as a novel causative gene for epilepsy emphasizing the critical role of KV3.2 in the regulation of brain excitability with an interesting genotype-phenotype correlation and a potential concept for precision medicine.

Published
2021

50. Efficacy, tolerability, and retention of fenfluramine for the treatment of seizures in patients with Dravet syndrome: Compassionate use program in Germany

Author

Strzelczyk, Adam, primary, Pringsheim, Milka, additional, Mayer, Thomas, additional, Polster, Tilman, additional, Klotz, Kerstin A., additional, Muhle, Hiltrud, additional, Alber, Michael, additional, Trollmann, Regina, additional, Spors, Hartwig, additional, Kluger, Gerhard, additional, Kurlemann, Gerhard, additional, and Schubert‐Bast, Susanne, additional

Published
2021
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