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1. The burden of pneumococcal meningitis in Austrian children between 2001 and 2008

Author

Klobassa, D. S., Zoehrer, B., Paulke-Korinek, M., Gruber-Sedlmayr, U., Pfurtscheller, K., Strenger, V., Sonnleitner, A., Kerbl, R., Ausserer, B., Arocker, W., Kaulfersch, W., Hausberger, B., Covi, B., Eitelberger, F., Vécsei, A., Simma, B., Birnbacher, R., Kurz, H., Zwiauer, K., Weghuber, D., Heuberger, S., Quehenberger, F., Kollaritsch, H., and Zenz, W.

Published
2014
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2. Next-Generation Sequencing (NGS) in Pediatric Patients with Epilepsy: How Many Previously Unsolved Cases Can Be Solved?

Author

Zobel, J., additional, Plecko, B., additional, Friedrich, M., additional, Gruber-Sedlmayr, U., additional, Rauter, L., additional, Brunner-Krainz, M., additional, Schwerin-Nagel, A., additional, Kortschak, A., additional, Steiner, K., additional, Pilch, H., additional, Raissakis, M., additional, Köstl, G., additional, Spiegl, B., additional, Seebacher, H., additional, Schreiner, E., additional, Blatterer, J., additional, Speicher, M., additional, and Verheyen, S., additional

Published
2021
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6. Newly diagnosed and growing subependymal giant cell astrocytoma in adults with tuberous sclerosis complex: Results from the International TOSCA Study

Author

Jansen, A.C. Belousova, E. Benedik, M.P. Carter, T. Cottin, V. Curatolo, P. D'Amato, L. D'Augères, G.B. De Vries, P.J. Ferreira, J.C. Feucht, M. Fladrowski, C. Hertzberg, C. Jozwiak, S. Lawson, J.A. MacAya, A. Marques, R. Nabbout, R. O'Callaghan, F. Qin, J. Sander, V. Sauter, M. Shah, S. Takahashi, Y. Touraine, R. Youroukos, S. Zonnenberg, B. Kingswood, J.C. Fladrowsk, C. Shinohara, N. Horie, S. Kubota, M. Tohyama, J. Imai, K. Kaneda, M. Kaneko, H. Uchida, Y. Kirino, T. Endo, S. Inoue, Y. Uruno, K. Serdaroglu, A. Yapici, Z. Anlar, B. Altunbasak, S. Lvova, O. Belyaev, O.V. Agranovich, O. Levitina, E.V. Maksimova, Y.V. Karas, A. Jiang, Y. Zou, L. Xu, K. Zhang, Y. Luan, G. Zhang, Y. Wang, Y. Jin, M. Ye, D. Liao, W. Zhou, L. Liu, J. Liao, J. Yan, B. Deng, Y. Jiang, L. Liu, Z. Huang, S. Li, H. Kim, K. Chen, P.-L. Lee, H.-F. Tsai, J.-D. Chi, C.-S. Huang, C.-C. Riney, K. Yates, D. Kwan, P. Likasitwattanakul, S. Nabangchang, C. Krisnachai Chomtho, L.T. Katanyuwong, K. Sriudomkajorn, S. Wilmshurst, J. Segel, R. Gilboa, T. Tzadok, M. Fattal-Valevski, A. Papathanasopoulos, P. Papavasiliou, A.S. Giannakodimos, S. Gatzonis, S. Pavlou, E. Tzoufi, M. Vergeer, A.M.H. Dhooghe, M. Verhelst, H. Roelens, F. Nassogne, M.C. Defresne, P. De Waele, L. Leroy, P. Demonceau, N. Legros, B. Van Bogaert, P. Ceulemans, B. Dom, L. Castelnau, P. De Saint Martin, A. Riquet, A. Milh, M. Cances, C. Pedespan, J.-M. Ville, D. Roubertie, A. Auvin, S. Berquin, P. Richelme, C. Allaire, C. Gueden, S. The Tich, S.N. Godet, B. Ruiz Falco Rojas, M.L. Planas, J.C. Bermejo, A.M. Dura, P.S. Aparicio, S.R. Martinez Gonzalez, M.J. Pison, J.L. Blanco Barca, M.O. Laso, E.L. Luengo, O.A. Aguirre Rodriguez, F.J. Dieguez, I.M. Salas, A.C. Carrera, I.M. Salcedo, E.M. Yoldi Petri, M.E. Candela, R.C. Da Conceicao Carrilho, I. Vieira, J.P. Da Silva Oliveira Monteiro, J.P. Santos De Oliveira Ferreira Leao, M.J. Marceano Ribeiro Luis, C.S. Mendonca, C.P. Endziniene, M. Strautmanis, J. Talvik, I. Canevini, M.P. Gambardella, A. Pruna, D. Buono, S. Fontana, E. Dalla Bernardina, B. Burloiu, C. Bacos Cosma, I.S. Vintan, M.A. Popescu, L. Zitterbart, K. Payerova, J. Bratsky, L. Zilinska, Z. Gruber-Sedlmayr, U. Baumann, M. Haberlandt, E. Rostasy, K. Pataraia, E. Elmslie, F. Johnston, C.A. Crawford, P. Uldall, P. Dahlin, M. Uvebrant, P. Rask, O. Bjoernvold, M. Brodtkorb, E. Sloerdahl, A. Solhoff, R. Gilje Jaatun, M.S. Mandera, M. Radzikowska, E.J. Wysocki, M. Fischereder, M. Kurlemann, G. Wilken, B. Wiemer-Kruel, A. Budde, K. Marquard, K. Knuf, M. Hahn, A. Hartmann, H. Merkenschlager, A. Trollmann, R. on behalf of TOSCA Consortium TOSCA Investigators

Abstract

The onset and growth of subependymal giant cell astrocytoma (SEGA) in tuberous sclerosis complex (TSC) typically occurs in childhood. There is minimal information on SEGA evolution in adults with TSC. Of 2,211 patients enrolled in TOSCA, 220 of the 803 adults (27.4%) ever had a SEGA. Of 186 patients with SEGA still ongoing in adulthood, 153 (82.3%) remained asymptomatic, and 33 (17.7%) were reported to ever have developed symptoms related to SEGA growth. SEGA growth since the previous scan was reported in 39 of the 186 adults (21%) with ongoing SEGA. All but one patient with growing SEGA had mutations in TSC2. Fourteen adults (2.4%) were newly diagnosed with SEGA during follow-up, and majority had mutations in TSC2. Our findings suggest that surveillance for new or growing SEGA is warranted also in adulthood, particularly in patients with mutations in TSC2. © 2019 Jansen, Belousova, Benedik, Carter, Cottin, Curatolo, D'Amato, Beaure d'Augères, de Vries, Ferreira, Feucht, Fladrowski, Hertzberg, Jozwiak, Lawson, Macaya, Marques, Nabbout, O'Callaghan, Qin, Sander, Sauter, Shah, Takahashi, Touraine, Youroukos, Zonnenberg and Kingswood.

Published
2019

7. Epilepsy in tuberous sclerosis complex: Findings from the TOSCA Study

Author

Nabbout, R, Belousova, E, Benedik, Mp, Carter, T, Cottin, V, Curatolo, P, Dahlin, M, Damato, L, D'Augeres, Gb, de Vries, Pj, Ferreira, Jc, Feucht, M, Fladrowski, C, Hertzberg, C, Jozwiak, S, Lawson, Ja, Macaya, A, Marques, R, O'Callaghan, F, Qin, J, Sander, V, Sauter, M, Shah, S, Takahashi, Y, Touraine, R, Youroukos, S, Zonnenberg, B, Jansen, A, Kingswood, Jc, Shinohara, N, Horie, S, Kubota, M, Tohyama, J, Imai, K, Kaneda, M, Kaneko, H, Uchida, Y, Endo, S, Inoue, Y, Uruno, K, Serdaroglu, A, Yapici, Z, Anlar, B, Altunbasak, S, Lvova, O, Valeryevich Belyaev, O, Agranovich, O, Vladislavovna Levitina, E, Vladimirovna Maksimova, Y, Karas, A, Jiang, Y, Zou, L, Xu, K, Zhang, Y, Luan, G, Wang, Y, Jin, M, Ye, D, Liao, W, Zhou, L, Liu, J, Liao, J, Yan, B, Deng, Y, Jiang, L, Liu, Z, Huang, S, Li, H, Kim, K, Chen, P, Lee, H, Tsai, J, Chi, C, Huang, C, Riney, K, Yates, D, Kwan, P, Likasitwattanakul, S, Nabangchang, C, Thampratankul Krisnachai Chomtho, L, Katanyuwong, K, Sriudomkajorn, S, Wilmshurst, J, Segel, R, Gilboa, T, Tzadok, M, Fattal-Valevski, A, Papathanasopoulos, P, Syrigou Papavasiliou, A, Giannakodimos, S, Gatzonis, S, Pavlou, E, Tzoufi, M, Dhooghe, M, Verhelst, H, Roelens, F, Cecile Nassogne, M, Defresne, P, De Waele, L, Leroy, P, Demonceau, N, Van Bogaert, P, Ceulemans, B, Dom, L, Castelnau, P, De Saint Martin, A, Riquet, A, Milh, M, Cances, C, Pedespan, J, Ville, D, Roubertie, A, Auvin, S, Berquin, P, Richelme, C, Allaire, C, Gueden, S, Nguyen The Tich, S, Godet, B, Rojas, Mlrf, Planas, Jc, Bermejo, Am, Dura, Ps, Aparicio, Sr, Gonzalez, Mjm, Pison, Jl, Blanco Barca, Mo, Laso, El, Luengo, Oa, Rodriguez, Fja, Dieguez, Im, Salas, Ac, Carrera, Im, Salcedo, Em, Petri, Mey, Candela, Rc, Carrilho, Idc, Vieira, Jp, Monteiro, Jpdso, Leao, Mjsdof, Luis, Csmr, Pires Mendonca, C, Endziniene, M, Strautmanis, J, Talvik, I, Canevini, Mp, Gambardella, A, Pruna, D, Buono, S, Fontana, E, Bernardina, Bd, Burloiu, C, Cosma, Isb, Vintan, Ma, Popescu, L, Zitterbart, K, Payerova, J, Bratsky, L, Zilinska, Z, Gruber-Sedlmayr, U, Haberlandt, E, Rostasy, K, Pataraia, E, Elmslie, F, Ann Johnston, C, Crawford, P, Uldall, P, Uvebrant, P, Rask, O, Bjoernvold, M, Sloerdahl, A, Solhoff, R, Jaatun, Msg, Mandera, M, Radzikowska, Ej, Wysocki, M, Fischereder, M, Kurlemann, G, Wilken, B, Wiemer-Kruel, A, Budde, K, Marquard, K, Knuf, M, Hahn, A, Hartmann, H, Merkenschlager, A, and Trollmann, R

Subjects
0301 basic medicine, medicine.medical_specialty, Pediatrics, Neurology, Disease, tuberous sclerosis complex, 030105 genetics & heredity, registry, 03 medical and health sciences, Tuberous sclerosis, Epilepsy, 0302 clinical medicine, Intellectual disability, medicine, Seizure control, TOSCA, business.industry, epilepsy, medicine.disease, Settore MED/39 - Neuropsichiatria Infantile, 3. Good health, medicine.anatomical_structure, Cohort, Full‐length Original Research, Neurology (clinical), TSC1, business, 030217 neurology & neurosurgery
Abstract

Summary Objective To present the baseline data of the international TuberOus SClerosis registry to increase disease Awareness (TOSCA) with emphasis on the characteristics of epilepsies associated with tuberous sclerosis complex (TSC). Methods Retrospective and prospective patients’ data on all aspects of TSC were collected from multiple countries worldwide. Epilepsy variables included seizure type, age at onset, type of treatment, and treatment outcomes and association with genotype, seizures control, and intellectual disability. As for noninterventional registries, the study protocol did not specify any particular clinical instruments, laboratory investigations, or intervention. Evaluations included those required for diagnosis and management following local best practice. Results Epilepsy was reported in 83.6% of patients (1852/2216) at baseline; 38.9% presented with infantile spasms and 67.5% with focal seizures. The mean age at diagnosis of infantile spasms was 0.4 year (median

Published
2019

9. Evaluation of Presumably Disease Causing SCN1A Variants in a Cohort of Common Epilepsy Syndromes

Author

Lal, D., Reinthaler, E. M., Dejanovic, B., May, P., Thiele, H., Lehesjoki, A. . E., Schwarz, G., Riesch, E., Ikram, M. A., Van Duijn, C. M., Uitterlinden, A. G., Hofman, A., Steinböck, H., Gruber sedlmayr, U., Neophytou, B., Zara, F., Hahn, A., Gormley, P., Becker, F., Weber, Y. G., Cilio, M. R., Kunz, W. S., Krause, R., Zimprich, F., Lemke, J. R., Nürnberg, P., Sander, T., Lerche, H., Neubauer, B. A., Palotie, A., Ruppert, A. K., Suls, A., Siren, A., Koeleman, B., Haberlandt, E., Ronen, G. M., Caglayan, H., Hjalgrim, H., Muhle, H., Schulz, H., Helbig, I., Altmüller, J., Geldner, J., Schubert, J., Jabbari, K., Everett, K., Feucht, M., Balestri, M., Nothnagel, M., Striano, Pasquale, Møller, R. S., Nabbout, R., Balling, R., Baulac, S., Bianchi, A., La Neve, A., Minetti, Carlo, Giuseppe, C., Neuroscience Center, Research Programs Unit, Anna-Elina Lehesjoki / Principal Investigator, Research Programme for Molecular Neurology, Institute for Molecular Medicine Finland, Aarno Palotie / Principal Investigator, Genomics of Neurological and Neuropsychiatric Disorders, Epidemiology, Neurology, Radiology & Nuclear Medicine, Internal Medicine, Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], and Luxembourg Centre for Systems Biomedicine (LCSB): Experimental Neurobiology (Balling Group) [research center]

Subjects
0301 basic medicine, Male, Genetics and Molecular Biology (all), FEBRILE SEIZURES PLUS, Disease, Pathogenesis, Bioinformatics, Pathology and Laboratory Medicine, Biochemistry, Epilepsy, Database and Informatics Methods, 0302 clinical medicine, Risk Factors, Medicine and Health Sciences, Medicine, SCN1A, Myoclonic Seizures, NEURONAL SODIUM-CHANNEL, MUTATION, Multidisciplinary, SEVERE MYOCLONIC EPILEPSY, Research Support, Non-U.S. Gov't, Medicine (all), Syndrome, Clinical Trial, 3. Good health, PREVALENCE, Multicenter Study, Neurology, Cohort, Female, Genetics & genetic processes [F10] [Life sciences], Génétique & processus génétiques [F10] [Sciences du vivant], Sequence Analysis, DRAVET SYNDROME, Research Article, Science, Mutation, Missense, Amino Acid Substitution, Case-Control Studies, Humans, NAV1.1 Voltage-Gated Sodium Channel, Agricultural and Biological Sciences (all), Biochemistry, Genetics and Molecular Biology (all), GENERALIZED EPILEPSY, Sequence Databases, Research and Analysis Methods, ITALIAN PATIENTS, 03 medical and health sciences, Dravet syndrome, Journal Article, Genetics, HEMIPLEGIC MIGRAINE, Tonic-Clonic Seizures, Generalized epilepsy, Molecular Biology Techniques, Sequencing Techniques, Molecular Biology, business.industry, Case-control study, 3112 Neurosciences, Biology and Life Sciences, Human Genetics, Epileptic Seizures, medicine.disease, GENE, Human genetics, 030104 developmental biology, Biological Databases, Epilepsy syndromes, Mutation Databases, Genetics of Disease, 3111 Biomedicine, Missense, business, 030217 neurology & neurosurgery
Abstract

A. Palotie on työryhmän jäsen. Objective The SCN1A gene, coding for the voltage-gated Na+ channel alpha subunit NaV1.1, is the clinically most relevant epilepsy gene. With the advent of high-throughput next-generation sequencing, clinical laboratories are generating an ever-increasing catalogue of SCN1A variants. Variants are more likely to be classified as pathogenic if they have already been identified previously in a patient with epilepsy. Here, we critically re-evaluate the pathogenicity of this class of variants in a cohort of patients with common epilepsy syndromes and subsequently ask whether a significant fraction of benign variants have been misclassified as pathogenic. Methods We screened a discovery cohort of 448 patients with a broad range of common genetic epilepsies and 734 controls for previously reported SCN1A mutations that were assumed to be disease causing. We re-evaluated the evidence for pathogenicity of the identified variants using in silico predictions, segregation, original reports, available functional data and assessment of allele frequencies in healthy individuals as well as in a follow up cohort of 777 patients. Results and Interpretation We identified 8 known missense mutations, previously reported as pathogenic, in a total of 17 unrelated epilepsy patients (17/448; 3.80%). Our re-evaluation indicates that 7 out of these 8 variants (p.R27T; p.R28C; p.R542Q; p.R604H; p.T1250M; p.E1308D; p.R1928G; NP_001159435.1) are not pathogenic. Only the p. T1174S mutation may be considered as a genetic risk factor for epilepsy of small effect size based on the enrichment in patients (P = 6.60 x 10(-4); OR = 0.32, fishers exact test), previous functional studies but incomplete penetrance. Thus, incorporation of previous studies in genetic counseling of SCN1A sequencing results is challenging and may produce incorrect conclusions.

Published
2016

10. Epileptic phenotypes, electroclinical features and clinical characteristics in 17 children with anti-NMDAR encephalitis

Author

Haberlandt, E., primary, Ensslen, M., additional, Gruber-Sedlmayr, U., additional, Plecko, B., additional, Brunner-Krainz, M., additional, Schimmel, M., additional, Schubert-Bast, S., additional, Neirich, U., additional, Philippi, H., additional, Kurleman, G., additional, Tardieu, M., additional, Wohlrab, G., additional, Borggraefe, I., additional, and Rostásy, K., additional

Published
2017
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12. Rare variants in -aminobutyric acid type A receptor genes in rolandic epilepsy and related syndromes

Author

Reinthaler, EM, Dejanovic, B, Lal, D, Semtner, M, Merkler, Y, Reinhold, A, Pittrich, DA, Hotzy, C, Feucht, M, Steinbock, H, Gruber-Sedlmayr, U, Ronen, GM, Neophytou, B, Geldner, J, Haberlandt, E, Muhle, H, Ikram, Arfan, Duijn, Cornelia, Uitterlinden, André, Hofman, Bert, Altmuller, J, Kawalia, A, Toliat, MR, Nurnberg, P, Lerche, H, Nothnagel, M, Thiele, H, Sander, T, Meier, JC, Schwarz, G, Neubauer, BA, Zimprich, F, Epidemiology, and Internal Medicine

Abstract

ObjectiveTo test whether mutations in -aminobutyric acid type A receptor (GABA(A)-R) subunit genes contribute to the etiology of rolandic epilepsy (RE) or its atypical variants (ARE). MethodsWe performed exome sequencing to compare the frequency of variants in 18 GABA(A)-R genes in 204 European patients with RE/ARE versus 728 platform-matched controls. Identified GABRG2 variants were functionally assessed for protein stability, trafficking, postsynaptic clustering, and receptor function. ResultsOf 18 screened GABA(A)-R genes, we detected an enrichment of rare variants in the GABRG2 gene in RE/ARE patients (5 of 204, 2.45%) in comparison to controls (1 of 723, 0.14%; odds ratio=18.07, 95% confidence interval=2.01-855.07, p=0.0024, p(corr)=0.043). We identified a GABRG2 splice variant (c.549-3T>G) in 2 unrelated patients as well as 3 nonsynonymous variations in this gene (p.G257R, p.R323Q, p.I389V). Functional assessment showed reduced surface expression of p.G257R and decreased GABA-evoked currents for p.R323Q. The p.G257R mutation displayed diminished levels of palmitoylation, a post-translational modification crucial for trafficking of proteins to the cell membrane. Enzymatically raised palmitoylation levels restored the surface expression of the p.G257R variant 2 subunit. InterpretationThe statistical association and the functional evidence suggest that mutations of the GABRG2 gene may increase the risk of RE/ARE. Restoring the impaired membrane trafficking of some GABRG2 mutations by enhancing palmitoylation might be an interesting therapeutic approach to reverse the pathogenic effect of such mutants. Ann Neurol 2015;77:972-986

Published
2015

13. Evaluation of presumably disease causing SCN1A variants in a cohort of common epilepsy syndromes

Author

Lal, D. (Dennis), Reinthaler, E.M. (Eva M.), Dejanovic, B. (Borislav), May, P. (Patrick), Thiele, H. (Holger), Lehesjoki, A.E., Schwarz, G. (Günter), Riesch, E. (Erik), Ikram, M.A. (Arfan), Duijn, C.M. (Cornelia) van, Uitterlinden, A.G. (André), Hofman, A. (Albert), Steinböck, H. (Hannelore), Gruber-Sedlmayr, U. (Ursula), Neophytou, B. (Birgit), Zara, F. (Federico), Hahn, A. (Andreas), Gormley, A.M., Becker, F. (Felicitas), Weber, Y.G. (Yvonne G.), Cilio, M.R. (Maria Roberta), Kunz, W.S. (Wolfram S.), Krause, R. (Roland), Zimprich, F. (Fritz), Lemke, J.R. (Johannes R.), Nürnberg, P. (Peter), Sander, T. (Thomas), Lerche, H. (Holger), Neubauer, B.A. (Bernd A.), Palotie, A. (Aarno), Ruppert, A.-K. (Ann-Kathrin), Suls, A. (A.), Siren, A. (Auli), Koeleman, B.P.C. (Bobby), Haberlandt, E. (Edda), Ronen, G.M. (Gabriel M.), Caglayan, H. (Hande), Hjalgrim, H. (Helle), Muhle, H. (Hiltrud), Schulz, H. (Herbert), Helbig, I. (Ingo), Altmüller, J. (Janine), Geldner, J. (Julia), Schubert, J. (Julian), Jabbari, K. (Kamel), Everett, K. (Kate), Feucht, M. (Martha), Balestri, M. (Martina), Nothnagel, M. (Michael), Striano, P. (Pasquale), Møller, R.S. (Rikke), Nabbout, R. (Rima), Balling, R. (Rudi), Baulac, S. (Stephanie), Kunz, W. (Wolfram), Bianchi, A. (Amedeo), La Neve, A. (Angela), Minetti, C., Giuseppe, C. (Capovilla), Lal, D. (Dennis), Reinthaler, E.M. (Eva M.), Dejanovic, B. (Borislav), May, P. (Patrick), Thiele, H. (Holger), Lehesjoki, A.E., Schwarz, G. (Günter), Riesch, E. (Erik), Ikram, M.A. (Arfan), Duijn, C.M. (Cornelia) van, Uitterlinden, A.G. (André), Hofman, A. (Albert), Steinböck, H. (Hannelore), Gruber-Sedlmayr, U. (Ursula), Neophytou, B. (Birgit), Zara, F. (Federico), Hahn, A. (Andreas), Gormley, A.M., Becker, F. (Felicitas), Weber, Y.G. (Yvonne G.), Cilio, M.R. (Maria Roberta), Kunz, W.S. (Wolfram S.), Krause, R. (Roland), Zimprich, F. (Fritz), Lemke, J.R. (Johannes R.), Nürnberg, P. (Peter), Sander, T. (Thomas), Lerche, H. (Holger), Neubauer, B.A. (Bernd A.), Palotie, A. (Aarno), Ruppert, A.-K. (Ann-Kathrin), Suls, A. (A.), Siren, A. (Auli), Koeleman, B.P.C. (Bobby), Haberlandt, E. (Edda), Ronen, G.M. (Gabriel M.), Caglayan, H. (Hande), Hjalgrim, H. (Helle), Muhle, H. (Hiltrud), Schulz, H. (Herbert), Helbig, I. (Ingo), Altmüller, J. (Janine), Geldner, J. (Julia), Schubert, J. (Julian), Jabbari, K. (Kamel), Everett, K. (Kate), Feucht, M. (Martha), Balestri, M. (Martina), Nothnagel, M. (Michael), Striano, P. (Pasquale), Møller, R.S. (Rikke), Nabbout, R. (Rima), Balling, R. (Rudi), Baulac, S. (Stephanie), Kunz, W. (Wolfram), Bianchi, A. (Amedeo), La Neve, A. (Angela), Minetti, C., and Giuseppe, C. (Capovilla)

Abstract

Objective: The SCN1A gene, coding for the voltage-gated Na+ channel alpha subunit NaV1.1, is the clinically most relevant epilepsy gene. With the advent of high-throughput next-generation sequencing, clinical laboratories are generating an ever-increasing catalogue of SCN1A variants. Variants are more likely to be classified as pathogenic if they have already been identified previously in a patient with epilepsy. Here, we critically re-evaluate the pathogenicity of this class of variants in a cohort of patients with common epilepsy syndromes and subsequently ask whether a significant fraction of benign variants have been misclassified as pathogenic. Methods: We screened a discovery cohort of 448 patients with a broad range of common genetic epilepsies and 734 controls for previously reported SCN1A mutations that were assumed to be disease causing. We re-evaluated the evidence for pathogenicity of the identified variants using in silico predictions, segregation, original reports, available functional data and assessment of allele frequencies in healthy individuals as well as in a follow up cohort of 777 patients. Results and Interpretation: We identified 8 known missense mutations, previously reported as patho

Published
2016
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14. Evaluation of Presumably Disease Causing SCN1A Variants in a Cohort of Common Epilepsy Syndromes

Author

Lal, D, Reinthaler, EM, Dejanovici, B, May, P, Thiele, H, Lehesjoki, AE, Schwarz, G, Riesch, E, Ikram, Arfan, Duijn, Cornelia, Uitterlinden, André, Hofman, Bert, Steinbock, H, Gruber-Sedlmayr, U, Neophytou, B, Zara, F, Hahn, A, Gormley, P, Becker, F, Weber, YG, Cilio, MR, Kunz, WS, Krause, R, Zimprich, F, Lemke, JR, Nurnberg, P, Sander, T, Lerche, H, Neubauer, BA, Lal, D, Reinthaler, EM, Dejanovici, B, May, P, Thiele, H, Lehesjoki, AE, Schwarz, G, Riesch, E, Ikram, Arfan, Duijn, Cornelia, Uitterlinden, André, Hofman, Bert, Steinbock, H, Gruber-Sedlmayr, U, Neophytou, B, Zara, F, Hahn, A, Gormley, P, Becker, F, Weber, YG, Cilio, MR, Kunz, WS, Krause, R, Zimprich, F, Lemke, JR, Nurnberg, P, Sander, T, Lerche, H, and Neubauer, BA

Abstract

Objective The SCN1A gene, coding for the voltage-gated Na+ channel alpha subunit NaV1.1, is the clinically most relevant epilepsy gene. With the advent of high-throughput next-generation sequencing, clinical laboratories are generating an ever-increasing catalogue of SCN1A variants. Variants are more likely to be classified as pathogenic if they have already been identified previously in a patient with epilepsy. Here, we critically re-evaluate the pathogenicity of this class of variants in a cohort of patients with common epilepsy syndromes and subsequently ask whether a significant fraction of benign variants have been misclassified as pathogenic. Methods We screened a discovery cohort of 448 patients with a broad range of common genetic epilepsies and 734 controls for previously reported SCN1A mutations that were assumed to be disease causing. We re-evaluated the evidence for pathogenicity of the identified variants using in silico predictions, segregation, original reports, available functional data and assessment of allele frequencies in healthy individuals as well as in a follow up cohort of 777 patients. Results and Interpretation We identified 8 known missense mutations, previously reported as pathogenic, in a total of 17 unrelated epilepsy patients (17/448; 3.80%). Our re-evaluation indicates that 7 out of these 8 variants (p.R27T; p.R28C; p.R542Q; p.R604H; p.T1250M; p.E1308D; p.R1928G; NP_001159435.1) are not pathogenic. Only the p. T1174S mutation may be considered as a genetic risk factor for epilepsy of small effect size based on the enrichment in patients (P = 6.60 x 10(-4); OR = 0.32, fishers exact test), previous functional studies but incomplete penetrance. Thus, incorporation of previous studies in genetic counseling of SCN1A sequencing results is challenging and may produce incorrect conclusions.

Published
2016

15. Analysis of ELP4, SRPX2, and interacting genes in typical and atypical rolandic epilepsy

Author

Reinthaler, E., Lal, D., Jurkowski, Wiktor, Feucht, M., Steinböck, H., Gruber-Sedlmayr, U., Ronen, G., Geldner, J., Haberlandt, E., Neophytou, B., Hahn, A., Altmüller, J., Thiel, H., Toliat, M., Lerche, H., Nürnberg, Peter, Sander, T., Neubauer, B., Zimprich, F., and Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center]

Subjects
Association, Idiopathic focal childhood epilepsy, Mutation, CNV, SNP, Biochemistry, biophysics & molecular biology [F05] [Life sciences], Biochimie, biophysique & biologie moléculaire [F05] [Sciences du vivant], Gene
Abstract

Rolandic epilepsy (RE) and its atypical variants (atypical rolandic epilepsy, ARE) along the spectrum of epilepsy–aphasia disorders are characterized by a strong but largely unknown genetic basis. Two genes with a putative (ELP4) or a proven (SRPX2) function in neuronal migration were postulated to confer susceptibility to parts of the disease spectrum: the ELP4 gene to centrotemporal spikes and SRPX2 to ARE. To reexamine these findings, we investigated a cohort of 280 patients of European ancestry with RE/ARE for the etiological contribution of these genes and their close interaction partners. We performed next-generation sequencing and single-nucleotide polymorphism (SNP)–array based genotyping to screen for sequence and structural variants. In comparison to European controls we could not detect an enrichment of rare deleterious variants of ELP4, SRPX2, or their interaction partners in affected individuals. The previously described functional p.N327S variant in the X chromosomal SRPX2 gene was detected in two affected individuals (0.81%) and also in controls (0.26%), with some preponderance of male patients. We did not detect an association of SNPs in the ELP4 gene with centrotemporal spikes as previously reported. In conclusion our data do not support a major role of ELP4 and SRPX2 in the etiology of RE/ARE.

Published
2014

19. Analysis of ELP4, SRPX2, and interacting genes in typical and atypical rolandic epilepsy

Author

Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], Reinthaler, E., Lal, D., Jurkowski, Wiktor, Feucht, M., Steinböck, H., Gruber-Sedlmayr, U., Ronen, G., Geldner, J., Haberlandt, E., Neophytou, B., Hahn, A., Altmüller, J., Thiel, H., Toliat, M., Lerche, H., Nürnberg, Peter, Sander, T., Neubauer, B., Zimprich, F., Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], Reinthaler, E., Lal, D., Jurkowski, Wiktor, Feucht, M., Steinböck, H., Gruber-Sedlmayr, U., Ronen, G., Geldner, J., Haberlandt, E., Neophytou, B., Hahn, A., Altmüller, J., Thiel, H., Toliat, M., Lerche, H., Nürnberg, Peter, Sander, T., Neubauer, B., and Zimprich, F.

Abstract

Rolandic epilepsy (RE) and its atypical variants (atypical rolandic epilepsy, ARE) along the spectrum of epilepsy–aphasia disorders are characterized by a strong but largely unknown genetic basis. Two genes with a putative (ELP4) or a proven (SRPX2) function in neuronal migration were postulated to confer susceptibility to parts of the disease spectrum: the ELP4 gene to centrotemporal spikes and SRPX2 to ARE. To reexamine these findings, we investigated a cohort of 280 patients of European ancestry with RE/ARE for the etiological contribution of these genes and their close interaction partners. We performed next-generation sequencing and single-nucleotide polymorphism (SNP)–array based genotyping to screen for sequence and structural variants. In comparison to European controls we could not detect an enrichment of rare deleterious variants of ELP4, SRPX2, or their interaction partners in affected individuals. The previously described functional p.N327S variant in the X chromosomal SRPX2 gene was detected in two affected individuals (0.81%) and also in controls (0.26%), with some preponderance of male patients. We did not detect an association of SNPs in the ELP4 gene with centrotemporal spikes as previously reported. In conclusion our data do not support a major role of ELP4 and SRPX2 in the etiology of RE/ARE.

Published
2014

22. MOG- and AQP-4-IgG Antibodies in Children with Neuromyelitis Optica Spectrum Disorders and NMO-Related Symptoms

Author

Lechner, C., primary, Baumann, M., additional, Schanda, K., additional, Blaschek, A., additional, Lücke, T., additional, Klein, A., additional, Leiz, S., additional, Gruber-Sedlmayr, U., additional, Brunner-Krainz, M., additional, Pritsch, M., additional, Koch, J., additional, Schimmel, M., additional, Häusler, M., additional, Karenfort, M., additional, Reindl, M., additional, and Rostasy, K., additional

Published
2014
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24. Clinical and neuroradiological differences of paediatric acute disseminating encephalomyelitis with and without antibodies to the myelin oligodendrocyte glycoprotein

Author

Baumann, M., primary, Sahin, K., additional, Lechner, C., additional, Hennes, E. M., additional, Schanda, K., additional, Mader, S., additional, Karenfort, M., additional, Selch, C., additional, Hausler, M., additional, Eisenkolbl, A., additional, Salandin, M., additional, Gruber-Sedlmayr, U., additional, Blaschek, A., additional, Kraus, V., additional, Leiz, S., additional, Finsterwalder, J., additional, Gotwald, T., additional, Kuchukhidze, G., additional, Berger, T., additional, Reindl, M., additional, and Rostasy, K., additional

Published
2014
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25. Epilepsy, hippocampal sclerosis and febrile seizures linked by common genetic variation around SCN1A

Author

Kasperaviciute, D, Catarino, CB, Matarin, M, Leu, C, Novy, J, Tostevin, A, Leal, B, Hessel, EVS, Hallmann, K, Hildebrand, MS, Dahl, H-HM, Ryten, M, Trabzuni, D, Ramasamy, A, Alhusaini, S, Doherty, CP, Dorn, T, Hansen, J, Kraemer, G, Steinhoff, BJ, Zumsteg, D, Duncan, S, Kaelviaeinen, RK, Eriksson, KJ, Kantanen, A-M, Pandolfo, M, Gruber-Sedlmayr, U, Schlachter, K, Reinthaler, EM, Stogmann, E, Zimprich, F, Theatre, E, Smith, C, O'Brien, TJ, Tan, KM, Petrovski, S, Robbiano, A, Paravidino, R, Zara, F, Striano, P, Sperling, MR, Buono, RJ, Hakonarson, H, Chaves, J, Costa, PP, Silva, BM, da Silva, AM, de Graan, PNE, Koeleman, BPC, Becker, A, Schoch, S, von Lehe, M, Reif, PS, Rosenow, F, Becker, F, Weber, Y, Lerche, H, Roessler, K, Buchfelder, M, Hamer, HM, Kobow, K, Coras, R, Blumcke, I, Scheffer, IE, Berkovic, SF, Weale, ME, Delanty, N, Depondt, C, Cavalleri, GL, Kunz, WS, Sisodiya, SM, Kasperaviciute, D, Catarino, CB, Matarin, M, Leu, C, Novy, J, Tostevin, A, Leal, B, Hessel, EVS, Hallmann, K, Hildebrand, MS, Dahl, H-HM, Ryten, M, Trabzuni, D, Ramasamy, A, Alhusaini, S, Doherty, CP, Dorn, T, Hansen, J, Kraemer, G, Steinhoff, BJ, Zumsteg, D, Duncan, S, Kaelviaeinen, RK, Eriksson, KJ, Kantanen, A-M, Pandolfo, M, Gruber-Sedlmayr, U, Schlachter, K, Reinthaler, EM, Stogmann, E, Zimprich, F, Theatre, E, Smith, C, O'Brien, TJ, Tan, KM, Petrovski, S, Robbiano, A, Paravidino, R, Zara, F, Striano, P, Sperling, MR, Buono, RJ, Hakonarson, H, Chaves, J, Costa, PP, Silva, BM, da Silva, AM, de Graan, PNE, Koeleman, BPC, Becker, A, Schoch, S, von Lehe, M, Reif, PS, Rosenow, F, Becker, F, Weber, Y, Lerche, H, Roessler, K, Buchfelder, M, Hamer, HM, Kobow, K, Coras, R, Blumcke, I, Scheffer, IE, Berkovic, SF, Weale, ME, Delanty, N, Depondt, C, Cavalleri, GL, Kunz, WS, and Sisodiya, SM

Abstract

Epilepsy comprises several syndromes, amongst the most common being mesial temporal lobe epilepsy with hippocampal sclerosis. Seizures in mesial temporal lobe epilepsy with hippocampal sclerosis are typically drug-resistant, and mesial temporal lobe epilepsy with hippocampal sclerosis is frequently associated with important co-morbidities, mandating the search for better understanding and treatment. The cause of mesial temporal lobe epilepsy with hippocampal sclerosis is unknown, but there is an association with childhood febrile seizures. Several rarer epilepsies featuring febrile seizures are caused by mutations in SCN1A, which encodes a brain-expressed sodium channel subunit targeted by many anti-epileptic drugs. We undertook a genome-wide association study in 1018 people with mesial temporal lobe epilepsy with hippocampal sclerosis and 7552 control subjects, with validation in an independent sample set comprising 959 people with mesial temporal lobe epilepsy with hippocampal sclerosis and 3591 control subjects. To dissect out variants related to a history of febrile seizures, we tested cases with mesial temporal lobe epilepsy with hippocampal sclerosis with (overall n = 757) and without (overall n = 803) a history of febrile seizures. Meta-analysis revealed a genome-wide significant association for mesial temporal lobe epilepsy with hippocampal sclerosis with febrile seizures at the sodium channel gene cluster on chromosome 2q24.3 [rs7587026, within an intron of the SCN1A gene, P = 3.36 × 10(-9), odds ratio (A) = 1.42, 95% confidence interval: 1.26-1.59]. In a cohort of 172 individuals with febrile seizures, who did not develop epilepsy during prospective follow-up to age 13 years, and 6456 controls, no association was found for rs7587026 and febrile seizures. These findings suggest SCN1A involvement in a common epilepsy syndrome, give new direction to biological understanding of mesial temporal lobe epilepsy with hippocampal sclerosis with febrile seizures, and

Published
2013

44. A splice site variant in the sodium channel gene SCN1A confers risk of febrile seizures

Author

Schlachter, K., primary, Gruber-Sedlmayr, U., additional, Stogmann, E., additional, Lausecker, M., additional, Hotzy, C., additional, Balzar, J., additional, Schuh, E., additional, Baumgartner, C., additional, Mueller, J. C., additional, Illig, T., additional, Wichmann, H. E., additional, Lichtner, P., additional, Meitinger, T., additional, Strom, T. M., additional, Zimprich, A., additional, and Zimprich, F., additional

Published
2009
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45. Opsoklonus-Myoklonus-Syndrom

Author

Gruber-Sedlmayr, U, primary, Freidl, T, additional, Lackner, H, additional, Moser, A, additional, Schwinger, W, additional, and Plecko, B, additional

Published
2008
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