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2. Exon-disrupting deletions ofNRXN1in idiopathic generalized epilepsy

Author

Møller, R.S., Weber, Y.G., Klitten, L.L., Trucks, H., Muhle, H., Kunz, W.S., Mefford, H.C., Franke, A., Kautza, M., Wolf, P., Dennig, D., Schreiber, S., Rückert, I.M., Wichmann, H.E., Ernst, J.P., Schurmann, C., Grabe, H.J., Tommerup, N., Stephani, U., Lerche, H., Hjalgrim, H., Helbig, I., Sander, T., Zimprich, F., Mörzinger, M., Feucht, M., Suls, A., Weckhuysen, S., Claes, L., Deprez, L., Smets, K., Van Dyck, T., Deconinck, T., De Jonghe, P., Velizarova, R., Dimova, P., Radionova, M., Tournev, I., Kancheva, D., Kaneva, R., Jordanova, A., Kjelgaard, D.B., Lehesjoki, A.E., Siren, A., Baulac, S., Leguern, E., Von Spiczak, S., Ostertag, P., Leber, M., Leu, C., Toliat, M.R., Nürnberg, P., Hempelmann, A., Rüschendorf, F., Elger, C.E., Kleefuß Lie, A.A., Surges, R., Gaus, V., Janz, D., Schmitz, B., Klein, K.M., Reif, P.S., Oertel, W.H., Hamer, H.M., Rosenow, F., Becker, F., Marini, C., Guerrini, R., Mei, D., Norci, V., Zara, F., Striano, P., Robbiano, A., Pezzella, M., Bianchi, A., Gambardella, A., Tinuper, P., La Neve, A., Capovilla, G., Vigliano, P., Crichiutti, G., Vanadia, F., Vignoli, A., Coppola, A., Striano, S., Giallonardo, M.T., Franceschetti, S., Belcastro, V., Benna, P., Coppola, G., De Palo, A., Ferlazzo, E., Vecchi, M., Martinelli, V., Bisulli, F., Beccaria, F., Del Giudice, E., Mancardi, M., Stranci, G., Scabar, A., Gobbi, G., Giordano, I., Koeleman, B.P.C., De Kovel, C., Lindhout, D., De Haan, G.J., Ozbeck, U., Bebek, N., Baykan, B., Ozdemir, O., Ugur, S., Kocasoy Orhan, E., Yücesan, E., Cine, N., Gokyigit, A., Gurses, C., Gul, G., Yapici, Z., Ozkara, C., Caglayan, H., Yalcin, O., Yalcin, D., Turkdogan, D., Dizdarer, G., Agan, K., R. S. Møller, Y. G. Weber, L. L. Klitten, H. Truck, H. Muhle, W. S. Kunz, H. C. Mefford, A. Franke, M. Kautza, P. Wolf, D. Dennig, S. Schreiber, I. Rückert, H. Wichmann, J. P. Ernst, C. Schurmann, H. J. Grabe, N. Tommerup, U. Stephani, H. Lerche, H. Hjalgrim, I. Helbig, T. Sander, P. Tinuper, F. Bisulli, EPICURE Consortium, Suls, Arvid, Weckhuysen, Sarah, Claes, Godelieve, Deprez, Liesbet, Smets, Katrien, Van Dyck, Tine, Deconinck, Tine, De Jonghe, Peter, Jordanova, Albena, Møller, R, Weber, Yg, Klitten, Ll, Trucks, H, Muhle, H, Kunz, W, Mefford, Hc, Franke, A, Kautza, M, Wolf, P, Dennig, D, Schreiber, S, Rückert, Im, Wichmann, He, Ernst, Jp, Schurmann, C, Grabe, Hj, Tommerup, N, Stephani, U, Lerche, H, Hjalgrim, H, Helbig, I, Sander, T, Epicure, Consortium, DEL GIUDICE, Ennio, Coppola, Antonietta, and YÜCESAN, EMRAH

Subjects
Male, Idiopathic generalized epilepsy, Neuronal, Idiopathic Generalized Epilepsy, 1q21, 1 Microdeletion, Two-hit Hypothesis, Nrxn1, Neuropsychological Tests, Immunoglobulin E, Cell Adhesion Molecules, Neuronal/genetics, Adult, Age of Onset, Anticonvulsant, Exon, 1q21.1 microdeletion, Exons/genetics, Odds Ratio, Nerve Tissue Proteins/genetics, Copy-number variation, Valproic Acid/therapeutic use, Age of Onset, Neural Cell Adhesion Molecules, genetics, DNA Copy Number Variations, Electroencephalography, Epilepsy, Genetics, biology, Triazines, Anticonvulsants/therapeutic use, Electroencephalography, genetics, Family, Female, Fructose, Exons, Middle Aged, Settore MED/39 - Neuropsichiatria Infantile, Pedigree, therapeutic use, Valproic Acid, Neurology, Settore MED/26 - Neurologia, Anticonvulsants, Epilepsy, Generalized, Female, Adult, Case-Control Studies, Cell Adhesion Molecules, Neuronal, DNA Copy Number Variations, Family, Fructose, Gene Deletion, Genotype, Humans, Infant, Microarray Analysis, Nerve Tissue Proteins, Valproic Acid, analogs /&/ derivatives/therapeutic use, Gene Deletion, Genotype, Humans, Infant, Male, Microarray Analysis, Middle Aged, Nerve Tissue Protein, therapeutic use, Case-Control Studies, Cell Adhesion Molecule, drug therapy/genetics/psychology, Exon, genetics, Neuropsychological Tests, Odds Ratio, Pedigree, Triazine, Lamotrigine, NRXN1, Topiramate, Epilepsy, Generalized/drug therapy, medicine, Allele, Biology, Gene, Generalized, Point mutation, Calcium-Binding Proteins, Odds ratio, medicine.disease, Triazines/therapeutic use, Settore MED/03 - Genetica Medica, therapeutic use, biology.protein, Fructose/analogs & derivatives, Human medicine, Neurology (clinical), Two-hit hypothesis
Abstract

Summary Purpose Neurexins are neuronal adhesion molecules located in the presynaptic terminal, where they interact with postsynaptic neuroligins to form a transsynaptic complex required for efficient neurotransmission in the brain. Recently, deletions and point mutations of the neurexin 1 (NRXN1) gene have been associated with a broad spectrum of neuropsychiatric disorders. This study aimed to investigate if NRXN1 deletions also increase the risk of idiopathic generalized epilepsies (IGEs). Methods We screened for deletions involving the NRXN1 gene in 1,569 patients with IGE and 6,201 controls using high-density oligonucleotide microarrays. Key Findings We identified exon-disrupting deletions of NRXN1 in 5 of 1,569 patients with IGE and 2 of 6,201 control individuals (p = 0.0049; odds ratio (OR) 9.91, 95% confidence interval (CI) 1.92–51.12). A complex familial segregation pattern in the IGE families was observed, suggesting that heterozygous NRXN1 deletions are susceptibility variants. Intriguingly, we identified a second large copy number variant in three of five index patients, supporting an involvement of heterogeneous susceptibility alleles in the etiology of IGE. Significance We conclude that exon-disrupting deletions of NRXN1 represent a genetic risk factor in the genetically complex predisposition of common IGE syndromes.

Published
2013
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3. Erratum: Exon-disrupting deletions of NRXN1 in idiopathic generalized epilepsy (Epilepsia (2013) 54 (256-264) DOI:10.1111/epi.12517)

Author

Møller, R. S., Weber, Y. G., Klitten, L. L., Trucks, H., Muhle, H., Kunz, W. S., Mefford, H. C., Franke, A., Kautza, M., Wolf, P., Dennig, D., Schreiber, S., Rückert, I. -M., Wichmann, H. -E., Ernst, J. P., Schurmann, C., Grabe, H. J., Tommerup, N., Stephani, U., Lerche, H., Hjalgrim, H., Helbig, I., Sander, T., Zimprich, F., Mörzinger, M., Feucht, M., Suls, A., Weckhuysen, S., Claes, L., Deprez, L., Smets, K., Van Dyck, T., Deconinck, T., De Jonghe, P., Velizarova, R., Dimova, P., Radionova, M., Tournev, I., Kancheva, D., Kaneva, R., Jordanova, A., Kjelgaard, D. B., Lehesjoki, A. -E., Siren, A., Baulac, S., Leguern, E., Von Spiczak, S., Ostertag, P., Leber, M., Leu, C., Toliat, M. R., Nürnberg, P., Hempelmann, A., Rüschendorf, F., Elger, C. E., Kleefuß-Lie, A. A., Surges, R., Gaus, V., Janz, D., Schmitz, B., Klein, K. M., Reif, P. S., Oertel, W. H., Hamer, H. M., Rosenow, F., Becker, F., Marini, C., Guerrini, R., Mei, D., Norci, V., Zara, F., Striano, P., Robbiano, A., Pezzella, M., Bianchi, A., Gambardella, A., Tinuper, P., La Neve, A., Capovilla, G., Vigliano, P., Crichiutti, G., Vanadia, F., Vignoli, A., Coppola, A., Striano, S., Giallonardo, M. T., Franceschetti, S., Belcastro, V., Benna, P., Coppola, G., De Palo, A., Ferlazzo, E., Vecchi, M., Martinelli, V., Bisulli, F., Beccaria, F., Del Giudice, E., Mancardi, M., Stranci, G., Scabar, A., Gobbi, G., Giordano, I., Koeleman, B. P. C., De Kovel, C., Lindhout, D., De Haan, G. -J., Ozbeck, U., Bebek, N., Baykan, B., Ozdemir, O., Ugur, S., Kocasoy-Orhan, E., Yücesan, E., Cine, N., Gokyigit, A., Gurses, C., Gul, G., Yapici, Z., Ozkara, C., Caglayan, H., Yalcin, O., Yalcin, D., Turkdogan, D., Dizdarer, G., Agan, K., Møller, R. S., Weber, Y. G., Klitten, L. L., Trucks, H., Muhle, H., Kunz, W. S., Mefford, H. C., Franke, A., Kautza, M., Wolf, P., Dennig, D., Schreiber, S., Rückert, I. -M., Wichmann, H. -E., Ernst, J. P., Schurmann, C., Grabe, H. J., Tommerup, N., Stephani, U., Lerche, H., Hjalgrim, H., Helbig, I., Sander, T., Zimprich, F., Mörzinger, M., Feucht, M., Suls, A., Weckhuysen, S., Claes, L., Deprez, L., Smets, K., Van Dyck, T., Deconinck, T., De Jonghe, P., Velizarova, R., Dimova, P., Radionova, M., Tournev, I., Kancheva, D., Kaneva, R., Jordanova, A., Kjelgaard, D. B., Lehesjoki, A. -E., Siren, A., Baulac, S., Leguern, E., Von Spiczak, S., Ostertag, P., Leber, M., Leu, C., Toliat, M. R., Nürnberg, P., Hempelmann, A., Rüschendorf, F., Elger, C. E., Kleefuß-Lie, A. A., Surges, R., Gaus, V., Janz, D., Schmitz, B., Klein, K. M., Reif, P. S., Oertel, W. H., Hamer, H. M., Rosenow, F., Becker, F., Marini, C., Guerrini, R., Mei, D., Norci, V., Zara, F., Striano, P., Robbiano, A., Pezzella, M., Bianchi, A., Gambardella, A., Tinuper, P., La Neve, A., Capovilla, G., Vigliano, P., Crichiutti, G., Vanadia, F., Vignoli, A., Coppola, A., Striano, S., Giallonardo, M. T., Franceschetti, S., Belcastro, V., Benna, P., Coppola, G., De Palo, A., Ferlazzo, E., Vecchi, M., Martinelli, V., Bisulli, F., Beccaria, F., Del Giudice, E., Mancardi, M., Stranci, G., Scabar, A., Gobbi, G., Giordano, I., Koeleman, B. P. C., De Kovel, C., Lindhout, D., De Haan, G. -J., Ozbeck, U., Bebek, N., Baykan, B., Ozdemir, O., Ugur, S., Kocasoy-Orhan, E., Yücesan, E., Cine, N., Gokyigit, A., Gurses, C., Gul, G., Yapici, Z., Ozkara, C., Caglayan, H., Yalcin, O., Yalcin, D., Turkdogan, D., Dizdarer, G., and Agan, K.

Published
2013

4. Genome-wide association analysis of genetic generalized epilepsies implicates susceptibility loci at 1q43, 2p16.1,2q22.3 and 17q21.32

Author

Steffens, M., Leu, C., Ruppert, A., Zara, F., Striano, P., Robbiano, A., Capovilla, G., Tinuper, P., Gambardella, A., Bianchi, A., La neve, A., Crichiutti, G., de kovel, C. G., Trenité, D. K. -N., de haan, G., Lindhout, D., Gaus, V., Schmitz, B., Janz, D., Weber, Y. G., Becker, F., Lerche, H., Steinhoff, B. J., Kleefuß-Lie, A. A., Kunz, W. S., Surges, R., Elger, C. E., Muhle, H., Von spiczak, S., Ostertag, P., Helbig, I., Stephani, U., Møller, R. S., Hjalgrim, H., Dibbens, L. M., Bellows, S., Oliver, K., Mullen, S., Scheffer, I. E., Berkovic, S. F., Everett, K. V., Gardiner, M. R., Marini, Chiara, Guerrini, R., Lehesjoki, A., Siren, A., Guipponi, M., Malafosse, A., Thomas, P., Nabbout, R., Baulac, S., Leguern, E., Guerrero, R., Serratosa, J. M., Reif, P. S., Rosenow, F., Mörzinger, M., Feucht, M., Zimprich, F., Kapser, C., Schankin, C. J., Suls, A., Smets, K., De jonghe, P., Jordanova, A., Caglayan, H., Yapici, Z., Yalcin, D. A., Baykan, B., Bebek, N., Ozbek, U., Gieger, C., Wichmann, H., Balschun, T., Ellinghaus, D., Franke, A., Meesters, C., Becker, T., Wienker, T. F., Hempelmann, A., Schulz, H., Rüschendorf, F., Leber, M., Pauck, S. M., Trucks, H., Toliat, M. R., Nürnberg, P., Avanzini, G., Koeleman, B. P., Sander, T., Weckhuysen, S., Claes, L., Deprez, L., Van Dyck, T., Deconinck, T., De Jonghe, P., Velizarova, R., Dimova, P., Radionova, M., Tournev, I., Kancheva, D., Kaneva, R., Lehesjoki, A. -E., von Spiczak, S., Martin Klein, K., Oertel, W. H., Hamer, H. M., Marini, C., Mei, D., Norci, V., Pezzella, M., La Neve, A., Vigliano, P., Vanadia, F., Vignoli, A., Coppola, A., Striano, S., Egeo, G., Teresa Giallonardo, M., Franceschetti, S., Belcastro, V., Benna, P., Coppola, G., De Palo, A., Ferlazzo, E., Vecchi, M., Martinelli, V., Bisulli, F., Beccaria, F., Del Giudice, E., Mancardi, M., Stranci, G., Scabar, A., Gobbi, G., Giordano, I., de Haan, G. -J., Giraldez, B. G., Ozbeck, U., Ozdemir, O., Ugur, S., Kocasoy-Orhan, E., Yücesan, E., Cine, N., Gokyigit, A., Gurses, C., Gul, G., Ozkara, C., Yalcin, O., Turkdogan, D., Dizdarer, G., Agan, K., Steffens, Michael, Leu, Costin, Ruppert, Ann-Kathrin, Zara, Frederico, Dibbens, Leanne Michelle, Sander, Thomas, EPICURE Consortium, Epicure, Consortium, DEL GIUDICE, Ennio, Steffens, M, Leu, C, Ruppert, Ak, Zara, F, Striano, P, Robbiano, A., Coppola, Antonietta, E. P. I. C. U. R. E. Consortium, E. M. I.Net Consortium, M. Steffen, C. Leu, A. Ruppert, F. Zara, P. Striano, A. Robbiano, G. Capovilla, P. Tinuper, A. Gambardella, A. Bianchi, A. L. Neve, G. Crichiutti, C. G. F, D. K. Trenité, G. d. Haan, D. Lindhout, V. Gau, B. Schmitz, D. Janz, Y. G. Weber, F. Becker, H. Lerche, B. J. Steinhoff, A. A. Kleefuß-Lie, W. S. Kunz, R. Surge, C. E. Elger, H. Muhle, S. v. Spiczak, P. Ostertag, I. Helbig, U. Stephani, R. S. Møller, H. Hjalgrim, L. M. Dibben, S. Bellow, K. Oliver, S. Mullen, I. E. Scheffer, S. F. Berkovic, K. V. Everett, M. R. Gardiner, C. Marini, R. Guerrini, A. Lehesjoki, A. Siren, M. Guipponi, A. Malafosse, P. Thoma, R. Nabbout, S. Baulac, E. Leguern, R. Guerrero, J. M. Serratosa, P. S. Reif, F. Rosenow, M. Mörzinger, M. Feucht, F. Zimprich, C. Kapser, C. J. Schankin, A. Sul, K. Smet, P. D. Jonghe, A. Jordanova, H. Caglayan, Z. Yapici, D. A. Yalcin, B. Baykan, N. Bebek, U. Ozbek, C. Gieger, H. Wichmann, T. Balschun, D. Ellinghau, A. Franke, C. Meester, T. Becker, T. F. Wienker, A. Hempelmann, H. Schulz, F. Rüschendorf, M. Leber, S. M. Pauck, H. Truck, M. R. Toliat, P. Nürnberg, G. Avanzini, B. P. C, and T. Sander

Subjects
Candidate gene, Juvenile, Genome-wide association study, Alleles, Epilepsy, ZEB2 protein, human, VRK2 protein, human, 0302 clinical medicine, genetics [Genetic Predisposition to Disease], genetics, Humans, Myoclonic Epilepsy, genetics [Epilepsy, Generalized], SCN1A protein, human, Genetics (clinical), Genetics, 0303 health sciences, genetics [Epilepsy, Absence], Myoclonic Epilepsy, Juvenile, genetics, Genetic Predisposition to Disease, General Medicine, Protein-Serine-Threonine Kinases, 3. Good health, Chemistry, Absence, genetics, Epilepsy, genetics [Myoclonic Epilepsy, Juvenile], Epilepsy, Generalized, genetics [Receptor, Muscarinic M3], genetics, NAV1.1 Voltage-Gated Sodium Channel, genetics [Homeodomain Proteins], Single-nucleotide polymorphism, genetics [NAV1.1 Voltage-Gated Sodium Channel], Protein Serine-Threonine Kinases, Biology, genetics [Protein-Serine-Threonine Kinases], 03 medical and health sciences, ddc:570, Genetic variation, medicine, Humans, Genetic Predisposition to Disease, genetics, Repressor Protein, Allele, Molecular Biology, Alleles, Zinc Finger E-box Binding Homeobox 2, 030304 developmental biology, Homeodomain Proteins, Receptor, Muscarinic M3, genetics, Protein-Serine-Threonine Kinase, genetics, Receptor, Generalized, genetics, Genome-Wide Association Study, Homeodomain Protein, Heritability, medicine.disease, NAV1.1 Voltage-Gated Sodium Channel, Repressor Proteins, genetics [Repressor Proteins], Muscarinic M3, Epilepsy, Absence, Myoclonic epilepsy, Human medicine, Juvenile myoclonic epilepsy, 030217 neurology & neurosurgery, Genome-Wide Association Study
Abstract

Genetic generalized epilepsies (GGEs) have a lifetime prevalence of 0.3\% and account for 20-30\% of all epilepsies. Despite their high heritability of 80\%, the genetic factors predisposing to GGEs remain elusive. To identify susceptibility variants shared across common GGE syndromes, we carried out a two-stage genome-wide association study (GWAS) including 3020 patients with GGEs and 3954 controls of European ancestry. To dissect out syndrome-related variants, we also explored two distinct GGE subgroups comprising 1434 patients with genetic absence epilepsies (GAEs) and 1134 patients with juvenile myoclonic epilepsy (JME). Joint Stage-1 and 2 analyses revealed genome-wide significant associations for GGEs at 2p16.1 (rs13026414, P(meta) = 2.5 × 10(-9), OR[T] = 0.81) and 17q21.32 (rs72823592, P(meta) = 9.3 × 10(-9), OR[A] = 0.77). The search for syndrome-related susceptibility alleles identified significant associations for GAEs at 2q22.3 (rs10496964, P(meta) = 9.1 × 10(-9), OR[T] = 0.68) and at 1q43 for JME (rs12059546, P(meta) = 4.1 × 10(-8), OR[G] = 1.42). Suggestive evidence for an association with GGEs was found in the region 2q24.3 (rs11890028, P(meta) = 4.0 × 10(-6)) nearby the SCN1A gene, which is currently the gene with the largest number of known epilepsy-related mutations. The associated regions harbor high-ranking candidate genes: CHRM3 at 1q43, VRK2 at 2p16.1, ZEB2 at 2q22.3, SCN1A at 2q24.3 and PNPO at 17q21.32. Further replication efforts are necessary to elucidate whether these positional candidate genes contribute to the heritability of the common GGE syndromes.

Published
2012
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5. Protocadherin 19 mutations in girls with infantile-onset epilepsy

Author

Marini, C, Mei, Daniele, Parmeggiani, L, Norci, V, Calado, E, Ferrari, A, Moreira, A, Pisano, T, Specchio, N, Vigevano, F, Battaglia, Domenica Immacolata, Guerrini, R., Battaglia, Domenica Immacolata (ORCID:0000-0003-0491-4021), Marini, C, Mei, Daniele, Parmeggiani, L, Norci, V, Calado, E, Ferrari, A, Moreira, A, Pisano, T, Specchio, N, Vigevano, F, Battaglia, Domenica Immacolata, Guerrini, R., and Battaglia, Domenica Immacolata (ORCID:0000-0003-0491-4021)

Abstract

To explore the causative role of PCDH19 gene (Xq22) in female patients with epilepsy.

Published
2010

8. Expansion of the first PolyA tract of ARXcauses infantile spasms and status dystonicus

Author

Guerrini, R, Moro, F, Kato, M, Barkovich, A J., Shiihara, T, McShane, M A., Hurst, J, Loi, M, Tohyama, J, Norci, V, Hayasaka, K, Kang, U J., Das, S, and Dobyns, W B.

Abstract

ARXis a paired-type homeobox gene located on the X chromosome that contains five exons with four polyalanine (PolyA) tracts, a homeodomain, and a conserved C-terminal aristaless domain. Studies in humans have demonstrated remarkable pleiotropy: malformation phenotypes are associated with protein truncation mutations and missense mutations in the homeobox; nonmalformation phenotypes, including X-linked infantile spasms (ISS), are associated with missense mutations outside of the homeobox and expansion of the PolyA tracts.

Published
2007
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