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

Author

Joshua E. Motelow, Gundula Povysil, Ryan S. Dhindsa, Kate E. Stanley, Andrew S. Al- len, Yen-Chen Anne Feng, Daniel P. Howrigan, Liam E. Abbott, Ka- therine Tashman, Felecia Cerrato, Caroline Cusick, Tarjinder Singh, Henrike Heyne, Andrea E. Byrnes, Claire Churchhouse, Nick Watts, Matthew Solomonson, Dennis Lal, Namrata Gupta, Benjamin M. Neale, Gianpiero L. Cavalleri, Patrick Cossette, Chris Cotsapas, Peter De Jonghe, Tracy Dixon-Salazar, Renzo Guerrini, Hakon Hakonarson, Erin L. Heinzen, Ingo Helbig, Patrick Kwan, Anthony G. Marson, Slave ? Petrovski, Sitharthan Kamalakaran, Sanjay M. Sisodiya, Randy Stewart, Sarah Weckhuysen, Chantal Depondt, Dennis J. Dlugos, Ingrid E. Scheffer, Pasquale Striano, Catharine Freyer, Roland Krause, Patrick May, Kevin McKenna, Brigid M. Regan, Caitlin A. Bennett, Costin Leu, Stephanie L. Leech, Terence J. O'Brien, Marian Todaro, Hannah Stamberger, Danielle M. Andrade, Quratulain Zulfiqar Ali, Tara R. Sadoway, Heinz Krestel, Andre ? Schaller, Savvas S. Papacostas, Ioanna Kou- siappa, George A. Tanteles, Yiolanda Christou, Katalin Sterbova ?, Marke ? ta Vlckova ?, Lucie Sedlackova, Petra Lassuthova ?, Karl Martin Klein, Felix Rosenow, Philipp S. Reif, Susanne Knake, Bernd A. Neubauer, Friedrich Zimprich, Martha Feucht, Eva M. Reinthaler, Wolfram S. Kunz, Ga ?bor Zsurka, Rainer Surges, Tobias Baumgart- ner, Randi von Wrede, Manuela Pendziwiat, Hiltrud Muhle, An- nika Rademacher, Andreas van Baalen, Sarah von Spiczak, Ulrich Stephani, Zaid Afawi, Amos D. Korczyn, Moien Kanaan, Christina Canavati, Gerhard Kurlemann, Karen Mu ?ller-Schlu ?ter, Gerhard Kluger, Martin Ha ?usler, Ilan Blatt, Johannes R. Lemke, Ilona Krey, Yvonne G. Weber, Stefan Wolking, Felicitas Becker, Stephan Lauxmann, Christian Boßelmann, Josua Kegele, Christian Hengs- bach, Sarah Rau, Bernhard J. Steinhoff, Andreas Schulze-Bonhage, IngoBorggra ?fe, ChristophJ.Schankin, SusanneSchubert-Bast, Herbert Schreiber, Thomas Mayer, Rudolf Korinthenberg, Knut Brockmann, Markus Wolff, Dieter Dennig, Rene Madeleyn, Reetta Ka ?lvia ?inen, Anni Saarela, Oskari Timonen, Tarja Linnankivi, Anna-Elina Lehesjoki, Sylvain Rheims, Gaetan Lesca, Philippe Ryvlin, Louis Maillard, Luc Valton, Philippe Derambure, Fabrice Bartolomei, Edouard Hirsch, Ve ?ronique Michel, Francine Chas- soux, Mark I. Rees, Seo-Kyung Chung, William O. Pickrell, Robert Powell, Mark D. Baker, Beata Fonferko-Shadrach, Charlotte Law- thom, Joseph Anderson, Natascha Schneider, Simona Balestrini, Sara Zagaglia, Vera Braatz, Michael R. Johnson, Pauls Auce, Graeme J. Sills, Larry W. Baum, Pak C. Sham, Stacey S. Cherny, Colin H.T. Lui, Norman Delanty, Colin P. Doherty, Arif Shukralla, Hany El-Naggar, Peter Widdess-Walsh, Nina Barisic, Laura 12 The American Journal of Human Genetics 108, 1-18, June 3, 2021 Please cite this article in press as: Epi25 Collaborative, Sub-genic intolerance, ClinVar, the epilepsies: A whole-exome sequencing study of 29, 165 individuals, The American Journal of Human Genetics (2021), https://doi.org/10.1016/j.ajhg.2021.04.009 Canafoglia, Silvana Franceschetti, Barbara Castellotti, Tiziana Granata, Francesca Ragona, Federico Zara, Michele Iacomino, An- tonella Riva, Francesca Madia, Maria Stella Vari, Vincenzo Salpie- tro, Marcello Scala, Maria Margherita Mancardi, Lino Nobili, Elisa- betta Amadori, Thea Giacomini, Francesca Bisulli, Tommaso Pippucci, Laura Licchetta, Raffaella Minardi, Paolo Tinuper, Lor- enzo Muccioli, Barbara Mostacci, Antonio Gambardella, Angelo Labate, Grazia Annesi, Lorella Manna, Monica Gagliardi, Elena Parrini, Davide Mei, Annalisa Vetro, Claudia Bianchini, Martino Montomoli, Viola Doccini, Carmen Barba, Shinichi Hirose, At- sushi Ishii, Toshimitsu Suzuki, Yushi Inoue, Kazuhiro Yamakawa, Ahmad Beydoun, Wassim Nasreddine, Nathalie Khoueiry Zgheib, Birute Tumiene, Algirdas Utkus, Lynette G. Sadleir, Chontelle King, S. Hande Caglayan, Mutluay Arslan, Zuhal Yap?c?, P?nar To- paloglu, Bulent Kara, Uluc Yis, Dilsad Turkdogan, Asl? Gun- dogdu-Eken, Nerses Bebek, Meng-Han Tsai, Chen-Jui Ho, Chih- Hsiang Lin, Kuang-Lin Lin, I-Jun Chou, Annapurna Poduri, Beth R. Shiedley, Catherine Shain, Jeffrey L. Noebels, Alicia Goldman, Robyn M. Busch, Lara Jehi, Imad M. Najm, Lisa Ferguson, Jean Khoury, Tracy A. Glauser, Peggy O. Clark, Russell J. Buono, Thomas N. Ferraro, Michael R. Sperling, Warren Lo, Michael Privitera, Jac- queline A. French, Steven Schachter, Ruben I. Kuzniecky, Orrin Devinsky, Manu Hegde, David A. Greenberg, Colin A. Ellis, Ethan Goldberg, Katherine L. Helbig, Mahgenn Cosico, Priya Vaidis- waran, Eryn Fitch, Samuel F. Berkovic, Holger Lerche, Daniel H. Lowenstein, David B. Goldstein., Motelow J.E., Povysil G., Dhindsa R.S., Stanley K.E., Allen A.S., Feng Y.-C.A., Howrigan D.P., Abbott L.E., Tashman K., Cerrato F., Cusick C., Singh T., Heyne H., Byrnes A.E., Churchhouse C., Watts N., Solomonson M., Lal D., Gupta N., Neale B.M., Cavalleri G.L., Cossette P., Cotsapas C., De Jonghe P., Dixon-Salazar T., Guerrini R., Hakonarson H., Heinzen E.L., Helbig I., Kwan P., Marson A.G., Petrovski S., Kamalakaran S., Sisodiya S.M., Stewart R., Weckhuysen S., Depondt C., Dlugos D.J., Scheffer I.E., Striano P., Freyer C., Krause R., May P., McKenna K., Regan B.M., Bennett C.A., Leu C., Leech S.L., O'Brien T.J., Todaro M., Stamberger H., Andrade D.M., Ali Q.Z., Sadoway T.R., Krestel H., Schaller A., Papacostas S.S., Kousiappa I., Tanteles G.A., Christou Y., Sterbova K., Vlckova M., Sedlackova L., Lassuthova P., Klein K.M., Rosenow F., Reif P.S., Knake S., Neubauer B.A., Zimprich F., Feucht M., Reinthaler E.M., Kunz W.S., Zsurka G., Surges R., Baumgartner T., von Wrede R., Pendziwiat M., Muhle H., Rademacher A., van Baalen A., von Spiczak S., Stephani U., Afawi Z., Korczyn A.D., Kanaan M., Canavati C., Kurlemann G., Muller-Schluter K., Kluger G., Hausler M., Blatt I., Lemke J.R., Krey I., Weber Y.G., Wolking S., Becker F., Lauxmann S., Bosselmann C., Kegele J., Hengsbach C., Rau S., Steinhoff B.J., Schulze-Bonhage A., Borggrafe I., Schankin C.J., Schubert-Bast S., Schreiber H., Mayer T., Korinthenberg R., Brockmann K., Wolff M., Dennig D., Madeleyn R., Kalviainen R., Saarela A., Timonen O., Linnankivi T., Lehesjoki A.-E., Rheims S., Lesca G., Ryvlin P., Maillard L., Valton L., Derambure P., Bartolomei F., Hirsch E., Michel V., Chassoux F., Rees M.I., Chung S.-K., Pickrell W.O., Powell R., Baker M.D., Fonferko-Shadrach B., Lawthom C., Anderson J., Schneider N., Balestrini S., Zagaglia S., Braatz V., Johnson M.R., Auce P., Sills G.J., Baum L.W., Sham P.C., Cherny S.S., Lui C.H.T., Delanty N., Doherty C.P., Shukralla A., El-Naggar H., Widdess-Walsh P., Barisic N., Canafoglia L., Franceschetti S., Castellotti B., Granata T., Ragona F., Zara F., Iacomino M., Riva A., Madia F., Vari M.S., Salpietro V., Scala M., Mancardi M.M., Nobili L., Amadori E., Giacomini T., Bisulli F., Pippucci T., Licchetta L., Minardi R., Tinuper P., Muccioli L., Mostacci B., Gambardella A., Labate A., Annesi G., Manna L., Gagliardi M., Parrini E., Mei D., Vetro A., Bianchini C., Montomoli M., Doccini V., Barba C., Hirose S., Ishii A., Suzuki T., Inoue Y., Yamakawa K., Beydoun A., Nasreddine W., Khoueiry Zgheib N., Tumiene B., Utkus A., Sadleir L.G., King C., Caglayan S.H., Arslan M., Yapici Z., Topaloglu P., Kara B., Yis U., Turkdogan D., Gundogdu-Eken A., Bebek N., Tsai M.-H., Ho C.-J., Lin C.-H., Lin K.-L., Chou I.-J., Poduri A., Shiedley B.R., Shain C., Noebels J.L., Goldman A., Busch R.M., Jehi L., Najm I.M., Ferguson L., Khoury J., Glauser T.A., Clark P.O., Buono R.J., Ferraro T.N., Sperling M.R., Lo W., Privitera M., French J.A., Schachter S., Kuzniecky R.I., Devinsky O., Hegde M., Greenberg D.A., Ellis C.A., Goldberg E., Helbig K.L., Cosico M., Vaidiswaran P., Fitch E., Berkovic S.F., Lerche H., Lowenstein D.H., Goldstein D.B., Epi25 Collaborative, Institut de Neurosciences des Systèmes (INS), and Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
0301 basic medicine, focal epilepsy, Whole Exome Sequencing, Cohort Studies, Epilepsy, 0302 clinical medicine, Genetic Marker, Missense mutation, Exome, whole-exome sequencing, generalized epilepsy, ComputingMilieux_MISCELLANEOUS, Genetics (clinical), Exome sequencing, seizures, Genetics, ClinVar, Phenotype, epileptic encephalopathy, Epi25, intolerance, Case-Control Studie, Human, Genetic Markers, seizure, Disease Association, Biology, Article, 03 medical and health sciences, Exome Sequencing, medicine, Humans, Genetic Predisposition to Disease, Genetic Testing, Generalized epilepsy, Gene, Louvain, [SCCO.NEUR]Cognitive science/Neuroscience, Correction, Genetic Variation, medicine.disease, epilepsy, Human genetics, 030104 developmental biology, Case-Control Studies, Human medicine, Cohort Studie, Genetic generalized epilepsy, 030217 neurology & neurosurgery
Abstract

Summary Both mild and severe epilepsies are influenced by variants in the same genes, yet an explanation for the resulting phenotypic variation is unknown. As part of the ongoing Epi25 Collaboration, we performed a whole-exome sequencing analysis of 13,487 epilepsy-affected individuals and 15,678 control individuals. While prior Epi25 studies focused on gene-based collapsing analyses, we asked how the pattern of variation within genes differs by epilepsy type. Specifically, we compared the genetic architectures of severe developmental and epileptic encephalopathies (DEEs) and two generally less severe epilepsies, genetic generalized epilepsy and non-acquired focal epilepsy (NAFE). Our gene-based rare variant collapsing analysis used geographic ancestry-based clustering that included broader ancestries than previously possible and revealed novel associations. Using the missense intolerance ratio (MTR), we found that variants in DEE-affected individuals are in significantly more intolerant genic sub-regions than those in NAFE-affected individuals. Only previously reported pathogenic variants absent in available genomic datasets showed a significant burden in epilepsy-affected individuals compared with control individuals, and the ultra-rare pathogenic variants associated with DEE were located in more intolerant genic sub-regions than variants associated with non-DEE epilepsies. MTR filtering improved the yield of ultra-rare pathogenic variants in affected individuals compared with control individuals. Finally, analysis of variants in genes without a disease association revealed a significant burden of loss-of-function variants in the genes most intolerant to such variation, indicating additional epilepsy-risk genes yet to be discovered. Taken together, our study suggests that genic and sub-genic intolerance are critical characteristics for interpreting the effects of variation in genes that influence epilepsy.

Published
2021

2. Polygenic burden in focal and generalized epilepsies

Author

Leu C., Stevelink R., Smith A. W., Goleva S. B., Kanai M., Ferguson L., Campbell C., Kamatani Y., Okada Y., Sisodiya S. M., Cavalleri G. L., Koeleman B. P. C., Lerche H., Jehi L., Davis L. K., Najm I. M., Palotie A., Daly M. J., Busch R. M., Lal D., Feng Y. -C. A., Howrigan D. P., Abbott L. E., Tashman K., Cerrato F., Churchhouse C., Gupta N., Neale B. M., Berkovic S. F., Goldstein D. B., Lowenstein D. H., Cossette P., Cotsapas C., De Jonghe P., Dixon-Salazar T., Guerrini R., Hakonarson H., Heinzen E. L., Helbig I., Kwan P., Marson A. G., Petrovski S., Kamalakaran S., Stewart R., Weckhuysen S., Depondt C., Dlugos D. J., Scheffer I. E., Striano P., Freyer C., Krause R., May P., McKenna K., Regan B. M., Bellows S. T., Bennett C. A., Johns E. M. C., Macdonald A., Shilling H., Burgess R., Weckhuysen D., Bahlo M., O'Brien T. J., Todaro M., Stamberger H., Andrade D. M., Sadoway T. R., Mo K., Krestel H., Gallati S., Papacostas S. S., Kousiappa I., Tanteles G. A., Sterbova K., Vlckova M., Sedlackova L., Lassuthova P., Klein K. M., Rosenow F., Reif P. S., Knake S., Kunz W. S., Zsurka G., Elger C. E., Bauer J., Rademacher M., Pendziwiat M., Muhle H., Rademacher A., Van Baalen A., Von Spiczak S., Stephani U., Afawi Z., Korczyn A. D., Kanaan M., Canavati C., Kurlemann G., Muller-Schluter K., Kluger G., Hausler M., Blatt I., Lemke J. R., Krey I., Weber Y. G., Wolking S., Becker F., Hengsbach C., Rau S., Maisch A. F., Steinhoff B. J., Schulze-Bonhage A., Schubert-Bast S., Schreiber H., Borggrafe I., Schankin C. J., Mayer T., Korinthenberg R., Brockmann K., Dennig D., Madeleyn R., Kalviainen R., Auvinen P., Saarela A., Linnankivi T., Lehesjoki A. -E., Rees M. I., Chung S. -K., Pickrell W. O., Powell R., Schneider N., Balestrini S., Zagaglia S., Braatz V., Johnson M. R., Auce P., Sills G. J., Baum L. W., Sham P. C., Cherny S. S., Lui C. H. T., Barisic N., Delanty N., Doherty C. P., Shukralla A., McCormack M., El-Naggar H., Canafoglia L., Franceschetti S., Castellotti B., Granata T., Zara F., Iacomino M., Madia F., Vari M. S., Mancardi M. M., Salpietro V., Bisulli F., Tinuper P., Licchetta L., Pippucci T., Stipa C., Muccioli L., Minardi R., Gambardella A., Labate A., Annesi G., Manna L., Gagliardi M., Parrini E., Mei D., Vetro A., Bianchini C., Montomoli M., Doccini V., Marini C., Suzuki T., Inoue Y., Yamakawa K., Birute T., Ruta M., Algirdas U., Ruta P., Jurgita G., Ruta S., Sadleir L. G., King C., Mountier E., Caglayan S. H., Arslan M., Yapici Z., Yis U., Topaloglu P., Kara B., Turkdogan D., Gundogdu-Eken A., Bebek N., Ugur-Iseri S., Baykan B., Salman B., Haryanyan G., Yucesan E., Kesim Y., Ozkara C., Sheidley B. R., Shain C., Poduri A., Buono R. J., Ferraro T. N., Sperling M. R., Lo W., Privitera M., French J. A., Schachter S., Kuzniecky R. I., Devinsky O., Hegde M., Khankhanian P., Helbig K. L., Ellis C. A., Spalletta G., Piras F., Gili T., Ciullo V., Leu C., Stevelink R., Smith A.W., Goleva S.B., Kanai M., Ferguson L., Campbell C., Kamatani Y., Okada Y., Sisodiya S.M., Cavalleri G.L., Koeleman B.P.C., Lerche H., Jehi L., Davis L.K., Najm I.M., Palotie A., Daly M.J., Busch R.M., Lal D., Feng Y.-C.A., Howrigan D.P., Abbott L.E., Tashman K., Cerrato F., Churchhouse C., Gupta N., Neale B.M., Berkovic S.F., Goldstein D.B., Lowenstein D.H., Cossette P., Cotsapas C., De Jonghe P., Dixon-Salazar T., Guerrini R., Hakonarson H., Heinzen E.L., Helbig I., Kwan P., Marson A.G., Petrovski S., Kamalakaran S., Stewart R., Weckhuysen S., Depondt C., Dlugos D.J., Scheffer I.E., Striano P., Freyer C., Krause R., May P., McKenna K., Regan B.M., Bellows S.T., Bennett C.A., Johns E.M.C., Macdonald A., Shilling H., Burgess R., Weckhuysen D., Bahlo M., O'Brien T.J., Todaro M., Stamberger H., Andrade D.M., Sadoway T.R., Mo K., Krestel H., Gallati S., Papacostas S.S., Kousiappa I., Tanteles G.A., Sterbova K., Vlckova M., Sedlackova L., Lassuthova P., Klein K.M., Rosenow F., Reif P.S., Knake S., Kunz W.S., Zsurka G., Elger C.E., Bauer J., Rademacher M., Pendziwiat M., Muhle H., Rademacher A., Van Baalen A., Von Spiczak S., Stephani U., Afawi Z., Korczyn A.D., Kanaan M., Canavati C., Kurlemann G., Muller-Schluter K., Kluger G., Hausler M., Blatt I., Lemke J.R., Krey I., Weber Y.G., Wolking S., Becker F., Hengsbach C., Rau S., Maisch A.F., Steinhoff B.J., Schulze-Bonhage A., Schubert-Bast S., Schreiber H., Borggrafe I., Schankin C.J., Mayer T., Korinthenberg R., Brockmann K., Dennig D., Madeleyn R., Kalviainen R., Auvinen P., Saarela A., Linnankivi T., Lehesjoki A.-E., Rees M.I., Chung S.-K., Pickrell W.O., Powell R., Schneider N., Balestrini S., Zagaglia S., Braatz V., Johnson M.R., Auce P., Sills G.J., Baum L.W., Sham P.C., Cherny S.S., Lui C.H.T., Barisic N., Delanty N., Doherty C.P., Shukralla A., McCormack M., El-Naggar H., Canafoglia L., Franceschetti S., Castellotti B., Granata T., Zara F., Iacomino M., Madia F., Vari M.S., Mancardi M.M., Salpietro V., Bisulli F., Tinuper P., Licchetta L., Pippucci T., Stipa C., Muccioli L., Minardi R., Gambardella A., Labate A., Annesi G., Manna L., Gagliardi M., Parrini E., Mei D., Vetro A., Bianchini C., Montomoli M., Doccini V., Marini C., Suzuki T., Inoue Y., Yamakawa K., Birute T., Ruta M., Algirdas U., Ruta P., Jurgita G., Ruta S., Sadleir L.G., King C., Mountier E., Caglayan S.H., Arslan M., Yapici Z., Yis U., Topaloglu P., Kara B., Turkdogan D., Gundogdu-Eken A., Bebek N., Ugur-Iseri S., Baykan B., Salman B., Haryanyan G., Yucesan E., Kesim Y., Ozkara C., Sheidley B.R., Shain C., Poduri A., Buono R.J., Ferraro T.N., Sperling M.R., Lo W., Privitera M., French J.A., Schachter S., Kuzniecky R.I., Devinsky O., Hegde M., Khankhanian P., Helbig K.L., Ellis C.A., Spalletta G., Piras F., Gili T., Ciullo V., Commission of the European Communities, Medical Research Council (MRC), Tumienė, Birutė, Mameniškienė, Rūta, Utkus, Algirdas, Praninskienė, Rūta, Grikinienė, Jurgita, Samaitienė-Aleknienė, Rūta, Centre of Excellence in Complex Disease Genetics, Aarno Palotie / Principal Investigator, Institute for Molecular Medicine Finland, Genomics of Neurological and Neuropsychiatric Disorders, University of Helsinki, Helsinki Institute of Life Science HiLIFE, and Department of Medical and Clinical Genetics

Subjects
0301 basic medicine, Male, Multifactorial Inheritance, Epi25 Consortium, Databases, Factual, FEATURES, Genome-wide association study, Epilepsies, 3124 Neurology and psychiatry, Cohort Studies, Epilepsy, 0302 clinical medicine, Cost of Illness, 1ST SEIZURE, HISTORY, genetics, POPULATION, 11 Medical and Health Sciences, education.field_of_study, medicine.diagnostic_test, SCORES, Single Nucleotide, Biobank, 3. Good health, 17 Psychology and Cognitive Sciences, Genetic generalized epilepsy, Epilepsy, Generalized, Female, Partial, Cohort study, Human, medicine.medical_specialty, Population, European Continental Ancestry Group, Clinical Neurology, BIOBANK, Polymorphism, Single Nucleotide, epilepsy, genetic generalized epilepsy, common variant risk, Databases, 03 medical and health sciences, Genetic, Internal medicine, medicine, Journal Article, Genetics, Humans, Genetic Predisposition to Disease, Polymorphism, GENOME-WIDE ASSOCIATION, Generalized epilepsy, education, SEIZURE RECURRENCE, Factual, METAANALYSIS, Genetic testing, Neurology & Neurosurgery, RISK PREDICTION, Generalized, business.industry, 3112 Neurosciences, Common variant risk, Genetic Variation, Original Articles, medicine.disease, Comorbidity, Cost of Illne, Epilepsies, Partial, Genome-Wide Association Study, 030104 developmental biology, Neurology (clinical), Cohort Studie, business, 030217 neurology & neurosurgery
Abstract

See Hansen and Møller (doi:10.1093/brain/awz318) for a scientific commentary on this article. Using polygenic risk scores from a genome-wide association study in generalized and focal epilepsy, Leu et al. reveal a significantly higher genetic burden for epilepsy in multiple cohorts of people with epilepsy compared to population controls. Quantification of common variant burden may be valuable for epilepsy prognosis and treatment., Rare genetic variants can cause epilepsy, and genetic testing has been widely adopted for severe, paediatric-onset epilepsies. The phenotypic consequences of common genetic risk burden for epilepsies and their potential future clinical applications have not yet been determined. Using polygenic risk scores (PRS) from a European-ancestry genome-wide association study in generalized and focal epilepsy, we quantified common genetic burden in patients with generalized epilepsy (GE-PRS) or focal epilepsy (FE-PRS) from two independent non-Finnish European cohorts (Epi25 Consortium, n = 5705; Cleveland Clinic Epilepsy Center, n = 620; both compared to 20 435 controls). One Finnish-ancestry population isolate (Finnish-ancestry Epi25, n = 449; compared to 1559 controls), two European-ancestry biobanks (UK Biobank, n = 383 656; Vanderbilt biorepository, n = 49 494), and one Japanese-ancestry biobank (BioBank Japan, n = 168 680) were used for additional replications. Across 8386 patients with epilepsy and 622 212 population controls, we found and replicated significantly higher GE-PRS in patients with generalized epilepsy of European-ancestry compared to patients with focal epilepsy (Epi25: P = 1.64×10−15; Cleveland: P = 2.85×10−4; Finnish-ancestry Epi25: P = 1.80×10−4) or population controls (Epi25: P = 2.35×10−70; Cleveland: P = 1.43×10−7; Finnish-ancestry Epi25: P = 3.11×10−4; UK Biobank and Vanderbilt biorepository meta-analysis: P = 7.99×10−4). FE-PRS were significantly higher in patients with focal epilepsy compared to controls in the non-Finnish, non-biobank cohorts (Epi25: P = 5.74×10−19; Cleveland: P = 1.69×10−6). European ancestry-derived PRS did not predict generalized epilepsy or focal epilepsy in Japanese-ancestry individuals. Finally, we observed a significant 4.6-fold and a 4.5-fold enrichment of patients with generalized epilepsy compared to controls in the top 0.5% highest GE-PRS of the two non-Finnish European cohorts (Epi25: P = 2.60×10−15; Cleveland: P = 1.39×10−2). We conclude that common variant risk associated with epilepsy is significantly enriched in multiple cohorts of patients with epilepsy compared to controls—in particular for generalized epilepsy. As sample sizes and PRS accuracy continue to increase with further common variant discovery, PRS could complement established clinical biomarkers and augment genetic testing for patient classification, comorbidity research, and potentially targeted treatment.

Published
2019

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

Author

Yen-Chen Anne Feng, Daniel P. Howrigan, Liam E. Abbott, Katherine Tashman, Felecia Cerrato, Tarjinder Singh, Henrike Heyne, Andrea Byrnes, Claire Churchhouse, Nick Watts, Matthew Solomonson, Dennis Lal, Erin L. Heinzen, Ryan S. Dhindsa, Kate E. Stanley, Gianpiero L. Cavalleri, Hakon Hakonarson, Ingo Helbig, Roland Krause, Patrick May, Sarah Weckhuysen, Slavé Petrovski, Sitharthan Kamalakaran, Sanjay M. Sisodiya, Patrick Cossette, Chris Cotsapas, Peter De Jonghe, Tracy Dixon-Salazar, Renzo Guerrini, Patrick Kwan, Anthony G. Marson, Randy Stewart, Chantal Depondt, Dennis J. Dlugos, Ingrid E. Scheffer, Pasquale Striano, Catharine Freyer, Kevin McKenna, Brigid M. Regan, Susannah T. Bellows, Costin Leu, Caitlin A. Bennett, Esther M.C. Johns, Alexandra Macdonald, Hannah Shilling, Rosemary Burgess, Dorien Weckhuysen, Melanie Bahlo, Terence J. O’Brien, Marian Todaro, Hannah Stamberger, Danielle M. Andrade, Tara R. Sadoway, Kelly Mo, Heinz Krestel, Sabina Gallati, Savvas S. Papacostas, Ioanna Kousiappa, George A. Tanteles, Katalin Štěrbová, Markéta Vlčková, Lucie Sedláčková, Petra Laššuthová, Karl Martin Klein, Felix Rosenow, Philipp S. Reif, Susanne Knake, Wolfram S. Kunz, Gábor Zsurka, Christian E. Elger, Jürgen Bauer, Michael Rademacher, Manuela Pendziwiat, Hiltrud Muhle, Annika Rademacher, Andreas van Baalen, Sarah von Spiczak, Ulrich Stephani, Zaid Afawi, Amos D. Korczyn, Moien Kanaan, Christina Canavati, Gerhard Kurlemann, Karen Müller-Schlüter, Gerhard Kluger, Martin Häusler, Ilan Blatt, Johannes R. Lemke, Ilona Krey, Yvonne G. Weber, Stefan Wolking, Felicitas Becker, Christian Hengsbach, Sarah Rau, Ana F. Maisch, Bernhard J. Steinhoff, Andreas Schulze-Bonhage, Susanne Schubert-Bast, Herbert Schreiber, Ingo Borggräfe, Christoph J. Schankin, Thomas Mayer, Rudolf Korinthenberg, Knut Brockmann, Dieter Dennig, Rene Madeleyn, Reetta Kälviäinen, Pia Auvinen, Anni Saarela, Tarja Linnankivi, Anna-Elina Lehesjoki, Mark I. Rees, Seo-Kyung Chung, William O. Pickrell, Robert Powell, Natascha Schneider, Simona Balestrini, Sara Zagaglia, Vera Braatz, Michael R. Johnson, Pauls Auce, Graeme J. Sills, Larry W. Baum, Pak C. Sham, Stacey S. Cherny, Colin H.T. Lui, Nina Barišić, Norman Delanty, Colin P. Doherty, Arif Shukralla, Mark McCormack, Hany El-Naggar, Laura Canafoglia, Silvana Franceschetti, Barbara Castellotti, Tiziana Granata, Federico Zara, Michele Iacomino, Francesca Madia, Maria Stella Vari, Maria Margherita Mancardi, Vincenzo Salpietro, Francesca Bisulli, Paolo Tinuper, Laura Licchetta, Tommaso Pippucci, Carlotta Stipa, Raffaella Minardi, Antonio Gambardella, Angelo Labate, Grazia Annesi, Lorella Manna, Monica Gagliardi, Elena Parrini, Davide Mei, Annalisa Vetro, Claudia Bianchini, Martino Montomoli, Viola Doccini, Carla Marini, Toshimitsu Suzuki, Yushi Inoue, Kazuhiro Yamakawa, Birute Tumiene, Lynette G. Sadleir, Chontelle King, Emily Mountier, S. Hande Caglayan, Mutluay Arslan, Zuhal Yapıcı, Uluc Yis, Pınar Topaloglu, Bulent Kara, Dilsad Turkdogan, Aslı Gundogdu-Eken, Nerses Bebek, Sibel Uğur-İşeri, Betül Baykan, Barış Salman, Garen Haryanyan, Emrah Yücesan, Yeşim Kesim, Çiğdem Özkara, Annapurna Poduri, Beth R. Shiedley, Catherine Shain, Russell J. Buono, Thomas N. Ferraro, Michael R. Sperling, Warren Lo, Michael Privitera, Jacqueline A. French, Steven Schachter, Ruben I. Kuzniecky, Orrin Devinsky, Manu Hegde, Pouya Khankhanian, Katherine L. Helbig, Colin A. Ellis, Gianfranco Spalletta, Fabrizio Piras, Federica Piras, Tommaso Gili, Valentina Ciullo, Andreas Reif, Andrew McQuillin, Nick Bass, Andrew McIntosh, Douglas Blackwood, Mandy Johnstone, Aarno Palotie, Michele T. Pato, Carlos N. Pato, Evelyn J. Bromet, Celia Barreto Carvalho, Eric D. Achtyes, Maria Helena Azevedo, Roman Kotov, Douglas S. Lehrer, Dolores Malaspina, Stephen R. Marder, Helena Medeiros, Christopher P. Morley, Diana O. Perkins, Janet L. Sobell, Peter F. Buckley, Fabio Macciardi, Mark H. Rapaport, James A. Knowles, Ayman H. Fanous, Steven A. McCarroll, Namrata Gupta, Stacey B. Gabriel, Mark J. Daly, Eric S. Lander, Daniel H. Lowenstein, David B. Goldstein, Holger Lerche, Samuel F. Berkovic, Benjamin M. Neale, Wellcome Trust, Department of Health, Institute of Neurology, UCL, Imperial College Healthcare NHS Trust- BRC Funding, Commission of the European Communities, Medical Research Council (MRC), Feng Y.-C.A., Howrigan D.P., Abbott L.E., Tashman K., Cerrato F., Singh T., Heyne H., Byrnes A., Churchhouse C., Watts N., Solomonson M., Lal D., Heinzen E.L., Dhindsa R.S., Stanley K.E., Cavalleri G.L., Hakonarson H., Helbig I., Krause R., May P., Weckhuysen S., Petrovski S., Kamalakaran S., Sisodiya S.M., Cossette P., Cotsapas C., De Jonghe P., Dixon-Salazar T., Guerrini R., Kwan P., Marson A.G., Stewart R., Depondt C., Dlugos D.J., Scheffer I.E., Striano P., Freyer C., McKenna K., Regan B.M., Bellows S.T., Leu C., Bennett C.A., Johns E.M.C., Macdonald A., Shilling H., Burgess R., Weckhuysen D., Bahlo M., O'Brien T.J., Todaro M., Stamberger H., Andrade D.M., Sadoway T.R., Mo K., Krestel H., Gallati S., Papacostas S.S., Kousiappa I., Tanteles G.A., Sterbova K., Vlckova M., Sedlackova L., Lassuthova P., Klein K.M., Rosenow F., Reif P.S., Knake S., Kunz W.S., Zsurka G., Elger C.E., Bauer J., Rademacher M., Pendziwiat M., Muhle H., Rademacher A., van Baalen A., von Spiczak S., Stephani U., Afawi Z., Korczyn A.D., Kanaan M., Canavati C., Kurlemann G., Muller-Schluter K., Kluger G., Hausler M., Blatt I., Lemke J.R., Krey I., Weber Y.G., Wolking S., Becker F., Hengsbach C., Rau S., Maisch A.F., Steinhoff B.J., Schulze-Bonhage A., Schubert-Bast S., Schreiber H., Borggrafe I., Schankin C.J., Mayer T., Korinthenberg R., Brockmann K., Dennig D., Madeleyn R., Kalviainen R., Auvinen P., Saarela A., Linnankivi T., Lehesjoki A.-E., Rees M.I., Chung S.-K., Pickrell W.O., Powell R., Schneider N., Balestrini S., Zagaglia S., Braatz V., Johnson M.R., Auce P., Sills G.J., Baum L.W., Sham P.C., Cherny S.S., Lui C.H.T., Barisic N., Delanty N., Doherty C.P., Shukralla A., McCormack M., El-Naggar H., Canafoglia L., Franceschetti S., Castellotti B., Granata T., Zara F., Iacomino M., Madia F., Vari M.S., Mancardi M.M., Salpietro V., Bisulli F., Tinuper P., Licchetta L., Pippucci T., Stipa C., Minardi R., Gambardella A., Labate A., Annesi G., Manna L., Gagliardi M., Parrini E., Mei D., Vetro A., Bianchini C., Montomoli M., Doccini V., Marini C., Suzuki T., Inoue Y., Yamakawa K., Tumiene B., Sadleir L.G., King C., Mountier E., Caglayan S.H., Arslan M., Yapici Z., Yis U., Topaloglu P., Kara B., Turkdogan D., Gundogdu-Eken A., Bebek N., Ugur-Iseri S., Baykan B., Salman B., Haryanyan G., Yucesan E., Kesim Y., Ozkara C., Poduri A., Shiedley B.R., Shain C., Buono R.J., Ferraro T.N., Sperling M.R., Lo W., Privitera M., French J.A., Schachter S., Kuzniecky R.I., Devinsky O., Hegde M., Khankhanian P., Helbig K.L., Ellis C.A., Spalletta G., Piras F., Gili T., Ciullo V., Reif A., McQuillin A., Bass N., McIntosh A., Blackwood D., Johnstone M., Palotie A., Pato M.T., Pato C.N., Bromet E.J., Carvalho C.B., Achtyes E.D., Azevedo M.H., Kotov R., Lehrer D.S., Malaspina D., Marder S.R., Medeiros H., Morley C.P., Perkins D.O., Sobell J.L., Buckley P.F., Macciardi F., Rapaport M.H., Knowles J.A., Fanous A.H., McCarroll S.A., Gupta N., Gabriel S.B., Daly M.J., Lander E.S., Lowenstein D.H., Goldstein D.B., Lerche H., Berkovic S.F., Neale B.M., Epi25 Collaborative, YÜCESAN, EMRAH, Institute for Molecular Medicine Finland, Children's Hospital, HUS Children and Adolescents, Department of Medical and Clinical Genetics, University Management, Centre of Excellence in Complex Disease Genetics, Aarno Palotie / Principal Investigator, and Genomics of Neurological and Neuropsychiatric Disorders

Subjects
s.berkovic@unimelb.edu.au [Epi25 Collaborative. Electronic address], 0301 basic medicine, GAMMA-2-SUBUNIT, burden analysi, DNA Mutational Analysis, PROTEIN, Neurodegenerative, VARIANTS, SUSCEPTIBILITY, Medical and Health Sciences, Epilepsy, 0302 clinical medicine, 2.1 Biological and endogenous factors, EPIDEMIOLOGY, Missense mutation, Exome, Aetiology, Genetics (clinical), Exome sequencing, 11 Medical and Health Sciences, seizures, GABRG2, Genetics, Genetics & Heredity, 0303 health sciences, biology, COMMON EPILEPSIES, 1184 Genetics, developmental biology, physiology, sequencing, Biological Sciences, Epi25 Collaborative, Phenotype, GENOME, epileptic encephalopathy, burden analysis, Neurological, Biotechnology, Genetic Markers, seizure, EEF1A2, Burden analysis, epilepsy, exome, Article, 03 medical and health sciences, Clinical Research, Exome Sequencing, Genetic variation, medicine, Humans, Genetic Predisposition to Disease, Gene, EPILEPTIC SEIZURES, METAANALYSIS, 030304 developmental biology, Human Genome, Neurosciences, Genetic Variation, 06 Biological Sciences, medicine.disease, Brain Disorders, 030104 developmental biology, Genetic marker, DE-NOVO MUTATIONS, Case-Control Studies, biology.protein, 3111 Biomedicine, Human medicine, 030217 neurology & neurosurgery
Abstract

Sequencing-based studies have identified novel risk genes for rare, severe epilepsies and revealed a role of rare deleterious variation in common epilepsies. To identify the shared and distinct ultra-rare genetic risk factors for rare and common epilepsies, we performed a whole-exome sequencing (WES) analysis of 9,170 epilepsy-affected individuals and 8,364 controls of European ancestry. We focused on three phenotypic groups; the rare but severe developmental and epileptic encephalopathies (DEE), and the commoner phenotypes of 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, with the strongest enrichment seen in DEE and the least in NAFE. Moreover, we found that inhibitory GABAA receptor genes were enriched for missense variants across all three classes of epilepsy, while 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 DEE 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 top associations, including CACNA1G, EEF1A2, and GABRG2 for GGE and LGI1, TRIM3, and GABRG2 for NAFE. Our study confirms a convergence in the genetics of common and rare epilepsies associated with ultra-rare coding variation and highlights a ubiquitous role for GABAergic inhibition in epilepsy etiology in the largest epilepsy WES study to date.

Published
2019

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