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1. The diagnostic yield of whole-exome sequencing targeting a gene panel for hearing impairment in the Netherlands

Author

Seco, C.Z. (Celia Zazo), Wesdorp, M. (Mieke), Feenstra, I. (Ilse), Pfundt, R. (Rolph), Hehir-Kwa, J. (Jayne), Lelieveld, S.H. (Stefan H.), Castelein, S. (Steven), Gilissen, C. (Christian), Wijs, I.J. (Ilse) de, Admiraal, R.J. (Ronald), Pennings, R.J.E. (Ronald J.E.), Kunst, H.P.M. (Henricus P.M.), van de Kamp, J.M. (Jiddeke M.), Tamminga, S. (Saskia), Houweling, A.C. (Arjan), Plomp, A. (Astrid), Maas, S.M. (Saskia), de Koning Gans, P.A.M. (P. A M), Kant, S.G. (Sarina), De Geus, C.M. (Christa M.), Frints, S.G.M. (Suzanna), Vanhoutte, E.K. (Els), Dooren, M.F. (Marieke) van, Boogaard, M.H. (Marie-José Henriëtte) van den, Scheffer, H. (Hans), Nelen, M.R. (Marcel), Kremer, H. (Hannie), Hoefsloot, E.H. (Lies), Schraders, M. (Margit), Yntema, H.G., Seco, C.Z. (Celia Zazo), Wesdorp, M. (Mieke), Feenstra, I. (Ilse), Pfundt, R. (Rolph), Hehir-Kwa, J. (Jayne), Lelieveld, S.H. (Stefan H.), Castelein, S. (Steven), Gilissen, C. (Christian), Wijs, I.J. (Ilse) de, Admiraal, R.J. (Ronald), Pennings, R.J.E. (Ronald J.E.), Kunst, H.P.M. (Henricus P.M.), van de Kamp, J.M. (Jiddeke M.), Tamminga, S. (Saskia), Houweling, A.C. (Arjan), Plomp, A. (Astrid), Maas, S.M. (Saskia), de Koning Gans, P.A.M. (P. A M), Kant, S.G. (Sarina), De Geus, C.M. (Christa M.), Frints, S.G.M. (Suzanna), Vanhoutte, E.K. (Els), Dooren, M.F. (Marieke) van, Boogaard, M.H. (Marie-José Henriëtte) van den, Scheffer, H. (Hans), Nelen, M.R. (Marcel), Kremer, H. (Hannie), Hoefsloot, E.H. (Lies), Schraders, M. (Margit), and Yntema, H.G.

Abstract

Hearing impairment (HI) is genetically heterogeneous which hampers genetic counseling and molecular diagnosis. Testing of several single HI-related genes is laborious and expensive. In this study, we evaluate the diagnostic utility of whole-exome sequencing (WES) targeting a panel of HI-related genes. Two hundred index patients, mostly of Dutch origin, with presumed hereditary HI underwent WES followed by targeted analysis of an HI gene panel of 120 genes. We found causative variants underlying the HI in 67 of 200 patients (33.5%). Eight of these patients have a large homozygous deletion involving STRC, OTOA or USH2A, which could only be identified by copy number variation detection. Variants of uncertain significance were found in 10 patients (5.0%). In the remaining 123 cases, no potentially causative variants were detected (61.5%). In our patient cohort, causative variants in GJB2, USH2A, MYO15A and STRC, and in MYO6 were the leading causes for autosomal recessive and dominant HI, respectively. Segregation analysis and functional analyses of variants of uncertain significance will probably further increase the diagnostic yield of WES.

Published
2017
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2. Diagnostic exome sequencing in 266 Dutch patients with visual impairment

Author

Haer-Wigman, L. (Lonneke), Zelst-Stams, W.A. van, Pfundt, R. (Rolph), Born, L.I. (Ingeborgh) van den, Klaver, C.C.W. (Caroline), Verheij, J.B. (Joke), Hoyng, C.B. (Carel), Breuning, M.H. (Martijn), Boon, C.J.F. (Camiel), Kievit, A.J.A. (Anneke J.A.), Verhoeven, V.J.M. (Virginie), Pott, J.W.R., Sallevelt, S.C.E.H. (Suzanne), Hagen, J.M. (Johanna) van, Plomp, A. (Astrid), Kroes, H.Y. (Hester), Lelieveld, S.H. (Stefan H.), Hehir-Kwa, J. (Jayne), Castelein, S. (Steven), Nelen, M.R. (Marcel), Scheffer, H. (Hans), Lugtenberg, D. (Dorien), Cremers, F.P.M. (Frans), Hoefsloot, E.H. (Lies), Yntema, H.G., Haer-Wigman, L. (Lonneke), Zelst-Stams, W.A. van, Pfundt, R. (Rolph), Born, L.I. (Ingeborgh) van den, Klaver, C.C.W. (Caroline), Verheij, J.B. (Joke), Hoyng, C.B. (Carel), Breuning, M.H. (Martijn), Boon, C.J.F. (Camiel), Kievit, A.J.A. (Anneke J.A.), Verhoeven, V.J.M. (Virginie), Pott, J.W.R., Sallevelt, S.C.E.H. (Suzanne), Hagen, J.M. (Johanna) van, Plomp, A. (Astrid), Kroes, H.Y. (Hester), Lelieveld, S.H. (Stefan H.), Hehir-Kwa, J. (Jayne), Castelein, S. (Steven), Nelen, M.R. (Marcel), Scheffer, H. (Hans), Lugtenberg, D. (Dorien), Cremers, F.P.M. (Frans), Hoefsloot, E.H. (Lies), and Yntema, H.G.

Abstract

Inherited eye disorders have a large clinical and genetic heterogeneity, which makes genetic diagnosis cumbersome. An exome-sequencing approach was developed in which data analysis was divided into two steps: the vision gene panel and exome analysis. In the vision gene panel analysis, variants in genes known to cause inherited eye disorders were assessed for pathogenicity. If no causative variants were detected and when the patient consented, the entire exome data was analyzed. A total of 266 Dutch patients with different types of inherited eye disorders, including inherited retinal dystrophies, cataract, developmental eye disorders and optic atrophy, were investigated. In the vision gene panel analysis (likely), causative variants were detected in 49% and in the exome analysis in an additional 2% of the patients. The highest detection rate of (likely) causative variants was in patients with inherited retinal dystrophies, for instance a yield of 63% in patients with retinitis pigmentosa. In patients with developmental eye defects, cataract and optic atrophy, the detection rate was 50, 33 and 17%, respectively. An exome-sequencing approach enables a genetic diagnosis in patients with different types of inherited eye disorders using one test. The exome approach has the same detection rate as targeted panel sequencing tests, but offers a number of advantages. For instance, the vision gene panel can be frequently and easily updated with additional (novel) eye disorder genes. Determination of the genetic diagnosis improved the clinical diagnosis, regarding the assessment of the inheritance pattern as well as future disease perspective.

Published
2017
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3. Discovery and functional prioritization of Parkinson's disease candidate genes from large-scale whole exome sequencing

Author

Jansen, I. (Iris), Ye, H. (Hui), Heetveld, S. (Sasja), Lechler, M.C. (Marie C.), Michels, H. (Helen), Seinstra, R.I. (Renée I.), Lubbe, S.J. (Steven J.), Drouet, V. (Valérie), Lesage, S. (Suzanne), Majounie, E. (Elisa), Gibbs, J.R. (J.Raphael), Nalls, M.A. (Michael), Ryten, M. (Mina), Botia, J.A. (Juan A.), Vandrovcova, J. (Jana), Simón-Sánchez, J. (Javier), Castillo-Lizardo, M. (Melissa), Rizzu, P. (Patrizia), Blauwendraat, C. (Cornelis), Chouhan, A.K. (Amit K.), Li, Y. (Yarong), Yogi, P. (Puja), Amin, N. (Najaf), Duijn, C.M. (Cornelia) van, Morris, H.R. (Huw R.), Brice, A. (Alexis), Singleton, A. (Andrew), David, D.C. (Della C.), Nollen, E.A. (Ellen A.), Jain, A. (Ashok), Shulman, J.M., Heutink, P. (Peter), Hernandez, D.G. (Dena), Arepalli, S. (Sampath), Brooks, J. (Janet), Price, R. (Ryan), Nicolas, A. (Aude), Chong, S. (Sean), Cookson, M.R. (Mark), Dillman, A. (Allissa), Moore, M. (Matt), Traynor, B.J. (Bryan), Plagnol, V. (Vincent), Nicholas W Wood, Sheerin, U.-M. (Una-Marie), Jose M Bras, Charlesworth, K. (Kate), Gardner, M. (Mac), Guerreiro, R. (Rita), Trabzuni, D. (Danyah), Hardy, J. (John), Sharma, M., Saad, M. (Mohamad), Javier Simón-Sánchez, Schulte, C. (Claudia), Corvol, J.C. (Jean-Christophe), Dürr, A. (Alexandra), Vidailhet, M. (M.), Sveinbjörnsdóttir, S. (Sigurlaug), Barker, R.A. (Roger), Caroline H Williams-Gray, Ben-Shlomo, Y., Berendse, H.W. (Henk W.), Dijk, K.D. (Karin) van, Berg, D. (Daniela), Brockmann, K., Wurster, K.D. (Kathrin), Mätzler, W. (Walter), Gasser, T. (Thomas), Martinez, M. (Maria), Bie, R.M.A. (Rob) de, Biffi, A. (Alessandro), Velseboer, D. (Daan), Bloem, B.R. (Bastiaan), Post, B. (Bart), Wickremaratchi, M. (Mirdhu), Warrenburg, B. (Bart) van de, Bochdanovits, Z. (Zoltan), Bonin, M. (Malte) von, Pétursson, H. (Hjörvar), Riess, O. (Olaf), Burn, D.J. (David), Lubbe, S. (Steven), Cooper, J.M. (J Mark), McNeill, N.H. (Nathan), Schapira, A. (Anthony), Lungu, C. (Codrin), Chen, H. (Honglei), Dong, J. (Jing), Chinnery, P.F. (Patrick F.), Hudson, G. (Gavin), Clarke, C.E. (Carl E.), Moorby, C. (Catriona), Counsell, C. (Carl), Damier, P. (Philippe), Dartigues, J.-F., Deloukas, P. (Panagiotis), Gray, E. (Emma), Edkins, T. (Ted), Hunt, S.E. (Sarah E.), Potter, S.C. (Simon), Tashakkori-Ghanbaria, A. (Avazeh), Deuschl, G. (Günther), Lorenz, D. (Delia), Dexter, D.T. (David), Durif, F. (Frank), Evans, J. (Jonathan Mark), Langford, C. (Cordelia), Foltynie, T. (Thomas), Goate, A.M. (Alison), Harris, C. (Clare), Hilten, J.J. (Jacobus) van, Hofman, A. (Albert), Hollenbeck, J.R. (John R.), Holton, J.L. (Janice), Hu, M. (Michele), Huang, X. (Xiaohong), Illig, T. (Thomas), Jónsson, P.V. (Pálmi), Lambert, J.-C., O'Sullivan, S.S. (Sean), Revesz, T. (Tamas), Shaw, K. (Karen), Lees, A.J. (Andrew), Lichtner, P. (Peter), Limousin, P. (Patricia), Lopez, G., Escott-Price, V. (Valentina), Pearson, J. (Justin), Williams, N. (Nigel), Mudanohwo, E. (Ese), Perlmutter, J.S. (Joel), Pollak, P. (Pierre), Rivadeneira Ramirez, F. (Fernando), Uitterlinden, A.G. (André), Sawcer, S.J. (Stephen), Scheffer, H. (Hans), Shoulson, I. (Ira), Shulman, L. (Lee), Smith, C. (Colin), Walker, R. (Robert), Spencer, C.C.A. (Chris C.), Strange, A. (Amy), Stefansson, H. (Hreinn), Bettella, F. (Francesco), Zwart, J-A. (John-Anker), Stockton, J.D. (Joanna D.), Talbot, D., Tanner, C.M. (Carlie), Tison, F. (François), Winder-Rhodes, S. (Sophie), Bhatia, K.P. (Kailash), Jansen, I. (Iris), Ye, H. (Hui), Heetveld, S. (Sasja), Lechler, M.C. (Marie C.), Michels, H. (Helen), Seinstra, R.I. (Renée I.), Lubbe, S.J. (Steven J.), Drouet, V. (Valérie), Lesage, S. (Suzanne), Majounie, E. (Elisa), Gibbs, J.R. (J.Raphael), Nalls, M.A. (Michael), Ryten, M. (Mina), Botia, J.A. (Juan A.), Vandrovcova, J. (Jana), Simón-Sánchez, J. (Javier), Castillo-Lizardo, M. (Melissa), Rizzu, P. (Patrizia), Blauwendraat, C. (Cornelis), Chouhan, A.K. (Amit K.), Li, Y. (Yarong), Yogi, P. (Puja), Amin, N. (Najaf), Duijn, C.M. (Cornelia) van, Morris, H.R. (Huw R.), Brice, A. (Alexis), Singleton, A. (Andrew), David, D.C. (Della C.), Nollen, E.A. (Ellen A.), Jain, A. (Ashok), Shulman, J.M., Heutink, P. (Peter), Hernandez, D.G. (Dena), Arepalli, S. (Sampath), Brooks, J. (Janet), Price, R. (Ryan), Nicolas, A. (Aude), Chong, S. (Sean), Cookson, M.R. (Mark), Dillman, A. (Allissa), Moore, M. (Matt), Traynor, B.J. (Bryan), Plagnol, V. (Vincent), Nicholas W Wood, Sheerin, U.-M. (Una-Marie), Jose M Bras, Charlesworth, K. (Kate), Gardner, M. (Mac), Guerreiro, R. (Rita), Trabzuni, D. (Danyah), Hardy, J. (John), Sharma, M., Saad, M. (Mohamad), Javier Simón-Sánchez, Schulte, C. (Claudia), Corvol, J.C. (Jean-Christophe), Dürr, A. (Alexandra), Vidailhet, M. (M.), Sveinbjörnsdóttir, S. (Sigurlaug), Barker, R.A. (Roger), Caroline H Williams-Gray, Ben-Shlomo, Y., Berendse, H.W. (Henk W.), Dijk, K.D. (Karin) van, Berg, D. (Daniela), Brockmann, K., Wurster, K.D. (Kathrin), Mätzler, W. (Walter), Gasser, T. (Thomas), Martinez, M. (Maria), Bie, R.M.A. (Rob) de, Biffi, A. (Alessandro), Velseboer, D. (Daan), Bloem, B.R. (Bastiaan), Post, B. (Bart), Wickremaratchi, M. (Mirdhu), Warrenburg, B. (Bart) van de, Bochdanovits, Z. (Zoltan), Bonin, M. (Malte) von, Pétursson, H. (Hjörvar), Riess, O. (Olaf), Burn, D.J. (David), Lubbe, S. (Steven), Cooper, J.M. (J Mark), McNeill, N.H. (Nathan), Schapira, A. (Anthony), Lungu, C. (Codrin), Chen, H. (Honglei), Dong, J. (Jing), Chinnery, P.F. (Patrick F.), Hudson, G. (Gavin), Clarke, C.E. (Carl E.), Moorby, C. (Catriona), Counsell, C. (Carl), Damier, P. (Philippe), Dartigues, J.-F., Deloukas, P. (Panagiotis), Gray, E. (Emma), Edkins, T. (Ted), Hunt, S.E. (Sarah E.), Potter, S.C. (Simon), Tashakkori-Ghanbaria, A. (Avazeh), Deuschl, G. (Günther), Lorenz, D. (Delia), Dexter, D.T. (David), Durif, F. (Frank), Evans, J. (Jonathan Mark), Langford, C. (Cordelia), Foltynie, T. (Thomas), Goate, A.M. (Alison), Harris, C. (Clare), Hilten, J.J. (Jacobus) van, Hofman, A. (Albert), Hollenbeck, J.R. (John R.), Holton, J.L. (Janice), Hu, M. (Michele), Huang, X. (Xiaohong), Illig, T. (Thomas), Jónsson, P.V. (Pálmi), Lambert, J.-C., O'Sullivan, S.S. (Sean), Revesz, T. (Tamas), Shaw, K. (Karen), Lees, A.J. (Andrew), Lichtner, P. (Peter), Limousin, P. (Patricia), Lopez, G., Escott-Price, V. (Valentina), Pearson, J. (Justin), Williams, N. (Nigel), Mudanohwo, E. (Ese), Perlmutter, J.S. (Joel), Pollak, P. (Pierre), Rivadeneira Ramirez, F. (Fernando), Uitterlinden, A.G. (André), Sawcer, S.J. (Stephen), Scheffer, H. (Hans), Shoulson, I. (Ira), Shulman, L. (Lee), Smith, C. (Colin), Walker, R. (Robert), Spencer, C.C.A. (Chris C.), Strange, A. (Amy), Stefansson, H. (Hreinn), Bettella, F. (Francesco), Zwart, J-A. (John-Anker), Stockton, J.D. (Joanna D.), Talbot, D., Tanner, C.M. (Carlie), Tison, F. (François), Winder-Rhodes, S. (Sophie), and Bhatia, K.P. (Kailash)

Abstract

Background: Whole-exome sequencing (WES) has been successful in identifying genes that cause familial Parkinson's disease (PD). However, until now this approach has not been deployed to study large cohorts of unrelated participants. To discover rare PD susceptibility variants, we performed WES in 1148 unrelated cases and 503 control participants. Candidate genes were subsequently validated for functions relevant to PD based on parallel RNA-interference (RNAi) screens in human cell culture and Drosophila and C. elegans models. Results: Assuming autosomal recessive inheritance, we identify 27 genes that have homozygous or compound heterozygous loss-of-function variants in PD cases. Definitive replication and confirmation of these findings were hindered by potential heterogeneity and by the rarity of the implicated alleles. We therefore looked for potential genetic interactions with established PD mechanisms. Following RNAi-mediated knockdown, 15 of the genes modulated mitochondrial dynamics in human neuronal cultures and four candidates enhanced α-synuclein-induced neurodegeneration in Drosophila. Based on complementary analyses in independent human datasets, five functionally validated genes-GPATCH2L, UHRF1BP1L, PTPRH, ARSB, and VPS13C-also showed evidence consistent with genetic replication. Conclusions: By integrating human genetic and functional evidence, we identify several PD susceptibility gene candidates for further investigation. Our approach highlights a powerful experimental strategy with broad applicability for future studies of disorders with complex genetic etiologies.

Published
2017
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4. The Val158Met COMT polymorphism is a modifier of the age at onset in Parkinson's disease with a sexual dimorphism

Author

Klebe, S. (Stephan), Golmard, L. (Lisa), Nalls, M.A. (Michael), Saad, F. (Fred), Singleton, A. (Andrew), Bras, J. (Jose), Hardy, J. (John), Simón-Sánchez, J. (Javier), Heutink, P. (Peter), Kuhlenbäumer, G. (Gregor), Charfi, R. (Rim), Klein, C. (Christoph), Hagenah, J., Gasser, T. (Thomas), Wurster, K.D. (Kathrin), Lesage, S. (Suzanne), Lorenz, D. (Delia), Deuschl, G. (Günther), Durif, F. (Franck), Pollak, M.N. (Michael), Damier, P. (Philippe), Tison, F. (François), Durr, A., Amouyel, P. (Philippe), Lambert, J.C. (Jean Charles), Tzourio, C. (Christophe), Maubaret, C. (Cécilia), Charbonnier-Beaupel, F. (Fanny), Tahiri, K. (Khadija), Vidailhet, M. (M.), Martinez, M. (Maria), Brice, A., Corvol, J.C. (Jean-Christophe), Agid, Y. (Yves), Anheim, M. (M.), Bonnet, A.-M. (A.), Borg, M. (Michael), Broussolle, E. (E.), Corvol, J.C. (Jean Christophe), Damier, Ph. (Ph), Destée, A. (A.), Durif, F. (F.), Klebe, S. (S.), Lohmann, E. (E.), Penet, C. (C.), Krack, P. (P.), Rascol, O. (O.), Tison, F. (F.), Tranchant, C. (C.), Vérin, M. (M.), Viallet, F. (F.), Vidailhet, M. (Marie), Plagnol, V. (Vincent), Bras, J.M. (Jose), Hernandez, D.G. (Dena), Sharma, M., Sheerin, U.-M. (Una-Marie), Schulte, C. (Claudia), Sveinbjörnsdóttir, S. (Sigurlaug), Arepalli, S. (Sampath), Band, G. (Gavin), Vukcevic, D. (Damjan), Barker, R.A. (Roger), Bellinguez, C. (Céline), Ben-Shlomo, Y., Berendse, H.W. (Henk W.), Berg, D. (Daniela), Bhatia, K.P. (Kailash), Bie, R.M.A. (Rob) de, Biffi, A. (Alessandro), Bloem, B. (Bas), Bochdanovits, Z. (Zoltan), Bonin, M. (Malte) von, Brockmann, K., Brooks, J. (Janet), Burn, D.J. (David), Charlesworth, K. (Kate), Chen, H. (Honglei), Chinnery, P.F. (Patrick), Chong, S. (Sean), Clarke, C.E. (Carl), Cookson, M.R. (Mark), Cooper, J.M. (J. Mark), Counsell, C. (Carl), Dartigues, J.-F., Deloukas, P. (Panagiotis), Dexter, D.T. (David), Dijk, K.D. (Karin) van, Dillman, A. (Allissa), Durif, F. (Frank), Edkins, T. (Ted), Evans, J. (Jonathan Mark), Foltynie, T. (Thomas), Freeman, C. (Colin), Gao, J. (Jianjun), Gardner, M. (Mac), Gibbs, J. (Raphael), Goate, A.M. (Alison), Gray, E. (Emma), Guerreiro, R. (Rita), Gustafsson, O. (Omar), Harris, C. (Clare), Hellenthal, F.A., Hilten, J.J. (Jacobus) van, Hofman, A. (Albert), Hollenbeck, J.R. (John R.), Holton, J.L. (Janice), Hu, M. (Michele), Huang, X. (Xiaohong), Huber, H. (Heiko), Hudson, G. (Gavin), Hunt, S.E. (Sarah), Huttenlocher, J. (Johanna), Illig, T. (Thomas), Jónsson, P.V. (Pálmi), Langford, C. (Cordelia), Lees, A.J. (Andrew), Lichtner, P. (Peter), Limousin, P. (Patricia), Lopez, G., McNeill, N.H. (Nathan), Moorby, C. (Catriona), Moore, M. (Matt), Morris, H. (Huw), Morrison, K.E. (Karen), Mudanohwo, E. (Ese), O'Sullivan, S.S. (Sean), Pearson, J. (Justin), Pearson, R. (Ruth), Perlmutter, J.S. (Joel), Pétursson, H. (Hjörvar), Pirinen, M. (Matti), Post, B. (Bart), Ravina, B. (Bernard), Revesz, T. (Tamas), Riess, O. (Olaf), Rivadeneira Ramirez, F. (Fernando), Rizzu, P. (Patrizia), Ryten, M. (Mina), Sawcer, S.J. (Stephen), Schapira, A.H.V. (Anthony), Scheffer, H. (Hans), Shaw, K. (Karen), Shoulson, I. (Ira), Sidransky, E. (Ellen), Silva, R. (Rohan) de, Smith, C. (Colin), Spencer, C.C.A. (Chris C.), Stefansson, H. (Hreinn), Wolf, C. (Christiane), Stockton, J.D. (Joanna), Strange, A. (Amy), Su, Z. (Zhan), Talbot, D., Tanner, C.M. (Carlie), Tashakkori-Ghanbaria, A. (Avazeh), Trabzuni, D. (Danyah), Traynor, B.J. (Bryan), Uitterlinden, A.G. (André), Vandrovcova, J. (Jana), Velseboer, D. (Daan), Walker, R. (Robert), Warrenburg, B. (Bart) van de, Weale, M.E. (Michael), Wickremaratchi, M. (Mirdhu), Williams, N. (Nigel), Williams-Gray, C.H. (Caroline), Winder-Rhodes, S. (Sophie), Zwart, J-A. (John-Anker), Wood, N.W. (Nicholas), Klebe, S. (Stephan), Golmard, L. (Lisa), Nalls, M.A. (Michael), Saad, F. (Fred), Singleton, A. (Andrew), Bras, J. (Jose), Hardy, J. (John), Simón-Sánchez, J. (Javier), Heutink, P. (Peter), Kuhlenbäumer, G. (Gregor), Charfi, R. (Rim), Klein, C. (Christoph), Hagenah, J., Gasser, T. (Thomas), Wurster, K.D. (Kathrin), Lesage, S. (Suzanne), Lorenz, D. (Delia), Deuschl, G. (Günther), Durif, F. (Franck), Pollak, M.N. (Michael), Damier, P. (Philippe), Tison, F. (François), Durr, A., Amouyel, P. (Philippe), Lambert, J.C. (Jean Charles), Tzourio, C. (Christophe), Maubaret, C. (Cécilia), Charbonnier-Beaupel, F. (Fanny), Tahiri, K. (Khadija), Vidailhet, M. (M.), Martinez, M. (Maria), Brice, A., Corvol, J.C. (Jean-Christophe), Agid, Y. (Yves), Anheim, M. (M.), Bonnet, A.-M. (A.), Borg, M. (Michael), Broussolle, E. (E.), Corvol, J.C. (Jean Christophe), Damier, Ph. (Ph), Destée, A. (A.), Durif, F. (F.), Klebe, S. (S.), Lohmann, E. (E.), Penet, C. (C.), Krack, P. (P.), Rascol, O. (O.), Tison, F. (F.), Tranchant, C. (C.), Vérin, M. (M.), Viallet, F. (F.), Vidailhet, M. (Marie), Plagnol, V. (Vincent), Bras, J.M. (Jose), Hernandez, D.G. (Dena), Sharma, M., Sheerin, U.-M. (Una-Marie), Schulte, C. (Claudia), Sveinbjörnsdóttir, S. (Sigurlaug), Arepalli, S. (Sampath), Band, G. (Gavin), Vukcevic, D. (Damjan), Barker, R.A. (Roger), Bellinguez, C. (Céline), Ben-Shlomo, Y., Berendse, H.W. (Henk W.), Berg, D. (Daniela), Bhatia, K.P. (Kailash), Bie, R.M.A. (Rob) de, Biffi, A. (Alessandro), Bloem, B. (Bas), Bochdanovits, Z. (Zoltan), Bonin, M. (Malte) von, Brockmann, K., Brooks, J. (Janet), Burn, D.J. (David), Charlesworth, K. (Kate), Chen, H. (Honglei), Chinnery, P.F. (Patrick), Chong, S. (Sean), Clarke, C.E. (Carl), Cookson, M.R. (Mark), Cooper, J.M. (J. Mark), Counsell, C. (Carl), Dartigues, J.-F., Deloukas, P. (Panagiotis), Dexter, D.T. (David), Dijk, K.D. (Karin) van, Dillman, A. (Allissa), Durif, F. (Frank), Edkins, T. (Ted), Evans, J. (Jonathan Mark), Foltynie, T. (Thomas), Freeman, C. (Colin), Gao, J. (Jianjun), Gardner, M. (Mac), Gibbs, J. (Raphael), Goate, A.M. (Alison), Gray, E. (Emma), Guerreiro, R. (Rita), Gustafsson, O. (Omar), Harris, C. (Clare), Hellenthal, F.A., Hilten, J.J. (Jacobus) van, Hofman, A. (Albert), Hollenbeck, J.R. (John R.), Holton, J.L. (Janice), Hu, M. (Michele), Huang, X. (Xiaohong), Huber, H. (Heiko), Hudson, G. (Gavin), Hunt, S.E. (Sarah), Huttenlocher, J. (Johanna), Illig, T. (Thomas), Jónsson, P.V. (Pálmi), Langford, C. (Cordelia), Lees, A.J. (Andrew), Lichtner, P. (Peter), Limousin, P. (Patricia), Lopez, G., McNeill, N.H. (Nathan), Moorby, C. (Catriona), Moore, M. (Matt), Morris, H. (Huw), Morrison, K.E. (Karen), Mudanohwo, E. (Ese), O'Sullivan, S.S. (Sean), Pearson, J. (Justin), Pearson, R. (Ruth), Perlmutter, J.S. (Joel), Pétursson, H. (Hjörvar), Pirinen, M. (Matti), Post, B. (Bart), Ravina, B. (Bernard), Revesz, T. (Tamas), Riess, O. (Olaf), Rivadeneira Ramirez, F. (Fernando), Rizzu, P. (Patrizia), Ryten, M. (Mina), Sawcer, S.J. (Stephen), Schapira, A.H.V. (Anthony), Scheffer, H. (Hans), Shaw, K. (Karen), Shoulson, I. (Ira), Sidransky, E. (Ellen), Silva, R. (Rohan) de, Smith, C. (Colin), Spencer, C.C.A. (Chris C.), Stefansson, H. (Hreinn), Wolf, C. (Christiane), Stockton, J.D. (Joanna), Strange, A. (Amy), Su, Z. (Zhan), Talbot, D., Tanner, C.M. (Carlie), Tashakkori-Ghanbaria, A. (Avazeh), Trabzuni, D. (Danyah), Traynor, B.J. (Bryan), Uitterlinden, A.G. (André), Vandrovcova, J. (Jana), Velseboer, D. (Daan), Walker, R. (Robert), Warrenburg, B. (Bart) van de, Weale, M.E. (Michael), Wickremaratchi, M. (Mirdhu), Williams, N. (Nigel), Williams-Gray, C.H. (Caroline), Winder-Rhodes, S. (Sophie), Zwart, J-A. (John-Anker), and Wood, N.W. (Nicholas)

Abstract

The catechol-O-methyltranferase (COMT) is one of the main enzymes that metabolise dopamine in the brain. The Val158Met polymorphism in the COMT gene (rs4680) causes a trimodal distribution of high (Val/Val), intermediate (Val/Met) and low (Met/Met) enzyme activity. We tested whether the Val158Met polymorphism is a modifier of the age at onset (AAO) in Parkinson’s disease (PD). The rs4680 was genotyped in a total of 16 609 subjects from five independent cohorts of European and North American origin (5886 patients with PD and 10 723 healthy controls). The multivariate analysis for comparing PD and control groups was based on a stepwise logistic regression, with gender, age and cohort origin included in the initial model. The multivariate analysis of the AAO was a mixed linear model, with COMT genotype and gender considered as fixed effects and cohort and cohort-gender interaction as random effects. COMT genotype was coded as a quantitative variable, assuming a codominant genetic effect. The distribution of the COMT polymorphism was not significantly different in patients and controls (p=0.22). The Val allele had a significant effect on the AAO with a younger AAO in patients with the Val/Val (57.1±13.9, p=0.03) than the Val/Met (57.4±13.9) and the Met/Met genotypes (58.3±13.5). The difference was greater in men (1.9 years between Val/Val and Met/Met, p=0.007) than in women (0.2 years, p=0.81). Thus, the Val158Met COMT polym

Published
2013
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5. Glucose transporter-1 deficiency syndrome: The expanding clinical and genetic spectrum of a treatable disorder

Author

Leen, W.G. (Wilhelmina), Klepper, J. (Joerg), Verbeek, M.M. (Marcel), Leferink, M. (Maike), Hofste, T. (Tom), Engelen, B.G.M. (Baziel) van, Wevers, R.A. (Ron), Arthur, T. (Todd), Bahi-Buisson, N. (Nadia), Ballhausen, D. (Diana), Bekhof, J. (Jolita), Bogaert, P. (Patrick) van, Carrilho, I. (Inês), Chabrol, B. (Brigitte), Champion, M.P. (Michael), Coldwell, J. (James), Clayton, P. (Peter), Donner, E. (Elizabeth), Evangeliou, A. (Athanasios), Ebinger, F. (Friedrich), Farrell, K. (Kevin), Forsyth, R.J. (Rob), Goede, C.G.E.L. (Christian) de, Gross, S. (Stephanie), Grünewald, S. (Sonja), Holthausen, H. (Hans), Jayawant, S. (Sandeep), Lachlan, K. (Katherine), Laugel, V. (Vincent), Leppig, K. (Kathy), Lim, M.J. (Ming), Mancini, G.M.S. (Grazia), Marina, A.D., Martorell, L. (Loreto), McMenamin, J. (Joe), Meuwissen, M.E.C. (Marije), Mundy, H. (Helen), Nilsson, N.O. (Nils), Panzer, A. (Axel), Poll-The, B.T., Rauscher, C. (Christian), Rouselle, C.M.R. (Christophe), Sandvig, I. (Inger), Scheffner, T. (Thomas), Sheridan, E. (Eamonn), Simpson, N. (Neil), Sykora, P. (Parol), Tomlinson, R. (Richard), Trounce, J. (John), Webb, D.W.M. (David), Weschke, B. (Bernhard), Scheffer, H. (Hans), Willemsen, M.A. (Michél), Leen, W.G. (Wilhelmina), Klepper, J. (Joerg), Verbeek, M.M. (Marcel), Leferink, M. (Maike), Hofste, T. (Tom), Engelen, B.G.M. (Baziel) van, Wevers, R.A. (Ron), Arthur, T. (Todd), Bahi-Buisson, N. (Nadia), Ballhausen, D. (Diana), Bekhof, J. (Jolita), Bogaert, P. (Patrick) van, Carrilho, I. (Inês), Chabrol, B. (Brigitte), Champion, M.P. (Michael), Coldwell, J. (James), Clayton, P. (Peter), Donner, E. (Elizabeth), Evangeliou, A. (Athanasios), Ebinger, F. (Friedrich), Farrell, K. (Kevin), Forsyth, R.J. (Rob), Goede, C.G.E.L. (Christian) de, Gross, S. (Stephanie), Grünewald, S. (Sonja), Holthausen, H. (Hans), Jayawant, S. (Sandeep), Lachlan, K. (Katherine), Laugel, V. (Vincent), Leppig, K. (Kathy), Lim, M.J. (Ming), Mancini, G.M.S. (Grazia), Marina, A.D., Martorell, L. (Loreto), McMenamin, J. (Joe), Meuwissen, M.E.C. (Marije), Mundy, H. (Helen), Nilsson, N.O. (Nils), Panzer, A. (Axel), Poll-The, B.T., Rauscher, C. (Christian), Rouselle, C.M.R. (Christophe), Sandvig, I. (Inger), Scheffner, T. (Thomas), Sheridan, E. (Eamonn), Simpson, N. (Neil), Sykora, P. (Parol), Tomlinson, R. (Richard), Trounce, J. (John), Webb, D.W.M. (David), Weschke, B. (Bernhard), Scheffer, H. (Hans), and Willemsen, M.A. (Michél)

Abstract

Glucose transporter-1 deficiency syndrome is caused by mutations in the SLC2A1 gene in the majority of patients and results in impaired glucose transport into the brain. From 2004-2008, 132 requests for mutational analysis of the SLC2A1 gene were studied by automated Sanger sequencing and multiplex ligation-dependent probe amplification. Mutation

Published
2010
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