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1. 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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2. Accurate prediction of a minimal region around a genetic association signal that contains the causal variant

Author

Bochdanovits, Z. (Zoltan), Simón-Sánchez, J. (Javier), Jonker, M.A. (Marianne), Hoogendijk, W.J.G. (Witte), Vaart, A. (Aad) van der, Heutink, P. (Peter), Bochdanovits, Z. (Zoltan), Simón-Sánchez, J. (Javier), Jonker, M.A. (Marianne), Hoogendijk, W.J.G. (Witte), Vaart, A. (Aad) van der, and Heutink, P. (Peter)

Abstract

In recent years, genome-wide association studies have been very successful in identifying loci for complex traits. However, typically these findings involve noncoding and/or intergenic SNPs without a clear functional effect that do not directly point to a gene. Hence, the challenge is to identify the causal variant responsible for the association signal. Typically, the first step is to identify all genetic variation in the locus region, usually by resequencing a large number of case chromosomes. Among all variants, the causal one needs to be identified in further functional studies. Because the experimental follow up can be very laborious, restricting the number of variants to be scrutinized can yield a great advantage. An objective method for choosing the size of the region to be followed up would be highly valuable. Here, we propose a simple method to call the minimal region around a significant association peak that is very likely to contain the causal variant. We model linkage disequilibrium (LD) in cases from the observed single SNP association signals, and predict the location of the causal variant by quantifying how well this relationship fits the data. Simulations showed that our approach identifies genomic regions of on average ∼50 kb with up to 90% probability to contain the causal variant. We apply our method to two genome-wide association data sets and localize both the functional variant REP1 in the synuclein gene that conveys susceptibility to Parkinson's disease and the APOE gene responsible for the association signal in the Alzheimer's disease data set.

Published
2014
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3. Modulatory Effects of the Piccolo Genotype on Emotional Memory in Health and Depression

Author

Woudstra, S. (Saskia), Tol, M.J.D. (Marie-José) van, Bochdanovits, Z. (Zoltan), Wee, N.J. (Nic) van der, Zitman, F.G. (Frans), Buchem, M.A. (Mark) van, Opmeer, E.M. (Esther), Aleman, A. (André), Penninx, B.W.J.H. (Brenda), Veltman, D.J. (Dick), Hoogendijk, W.J.G. (Witte), Woudstra, S. (Saskia), Tol, M.J.D. (Marie-José) van, Bochdanovits, Z. (Zoltan), Wee, N.J. (Nic) van der, Zitman, F.G. (Frans), Buchem, M.A. (Mark) van, Opmeer, E.M. (Esther), Aleman, A. (André), Penninx, B.W.J.H. (Brenda), Veltman, D.J. (Dick), and Hoogendijk, W.J.G. (Witte)

Abstract

Major depressive disorder (MDD) has been associated with biased memory formation for mood-congruent information, which may be related to altered monoamine levels. The piccolo (PCLO) gene, involved in monoaminergic neurotransmission, has previously been linked to depression in a genome-wide association study. Here, we investigated the role of the PCLO risk allele on functional magnetic resonance imaging (MRI) correlates of emotional memory in a sample of 89 MDD patients (64 PCLO risk allele carriers) and 29 healthy controls (18 PCLO risk allele carriers). During negative word encoding, risk allele carriers showed significant lower activity relative to non-risk allele carriers in the insula, and trend-wise in the anterior cingulate cortex and inferior frontal gyrus. Moreover, depressed risk allele carriers showed significant lower activity relative to non-risk allele carriers in the striatum, an effect which was absent in healthy controls. Finally, amygdalar response during processing new positive words vs. known words was blunted in healthy PCLO+ carriers and in MDD patients irrespective of genotype, which may indicate that signalling of salient novel information does not occur to the same extent in PCLO+ carriers and MDD patients. The PCLO risk allele may increase vulnerability for MDD by modulating local brain function with regard to responsiveness to salient stimuli (i.e. insula) and processing novel negative information. Also, depression-specific effects of PCLO on dorsal striatal activation during negative word encoding and the absence of amygdalar salience signalling for novel positive information further suggest a role of PCLO in symptom maintenance in MDD.

Published
2013
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4. Resequencing three candidate genes for major depressive disorder in a Dutch cohort

Author

Verbeek, E.C. (Eva), Bevova, M.R. (Marianna), Bochdanovits, Z. (Zoltan), Rizzu, P. (Patrizia), Bakker, I.M.C. (Ingrid), Uithuisje, T. (Tiny), Geus, E.J.C. (Eco) de, Smith, A.V. (Davey), Penninx, B.W.J.H. (Brenda), Boomsma, D.I. (Dorret), Hoogendijk, W.J.G. (Witte), Heutink, P. (Peter), Verbeek, E.C. (Eva), Bevova, M.R. (Marianna), Bochdanovits, Z. (Zoltan), Rizzu, P. (Patrizia), Bakker, I.M.C. (Ingrid), Uithuisje, T. (Tiny), Geus, E.J.C. (Eco) de, Smith, A.V. (Davey), Penninx, B.W.J.H. (Brenda), Boomsma, D.I. (Dorret), Hoogendijk, W.J.G. (Witte), and Heutink, P. (Peter)

Abstract

Major depressive disorder (MDD) is a psychiatric disorder, characterized by periods of low mood of more than two weeks, loss of interest in normally enjoyable activities and behavioral changes. MDD is a complex disorder and does not have a single genetic cause. In 2009 a genome wide association study (GWAS) was performed on the Dutch GAIN-MDD cohort. Many of the top signals of this GWAS mapped to a region spanning the gene PCLO, and the non-synonymous coding single nucleotide polymorphism (SNP) rs2522833 in the PCLO gene became genome wide significant after post-hoc analysis. We performed resequencing of PCLO, GRM7, and SLC6A4 in 50 control samples from the GAIN-MDD cohort, to detect new genomic variants. Subsequently, we genotyped these variants in the entire GAIN-MDD cohort and performed association analysis to investigate if rs2522833 is the causal variant or simply in linkage disequilibrium with a more associated variant. GRM7 and SLC6A4 are both candidate genes for MDD from literature. We aimed to gather more evidence that rs2522833 is indeed the causal variant in the GAIN-MDD cohort or to find a previously undetected common variant in either PCLO, GRM7, or SLC6A4 with a higher association in this cohort. After next generation sequencing and association analysis we excluded the possibility of an undetected common variant to be more associated. For neither PCLO nor GRM7 we found a more associated variant. For SLC6A4, we found a new SNP that showed a lower P-value (P = 0.07) than in the GAIN-MDD GWAS (P = 0.09). However, no evidence for genome-wide significance was found. Although we did not take into account rare variants, we conclude that our results provide further support for the hypothesis that the non-synonymous coding SNP rs2522833 in the PCLO gene is indeed likely to be the causal variant in the GAIN-MDD cohort.

Published
2013
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5. 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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6. Piccolo genotype modulates neural correlates of emotion processing but not executive functioning

Author

Woudstra, E. (Evert), Bochdanovits, Z. (Zoltan), Tol, M.J.D. (Marie-José) van, Veltman, D.J. (Dick), Zitman, F.G. (Frans), Buchem, M.A. (Mark) van, Wee, N.J. (Nic) van der, Opmeer, E.M. (Esther), Demenescu, L.R. (L.), Aleman, A. (André), Penninx, B.W.J.H. (Brenda), Hoogendijk, W.J.G. (Witte), Woudstra, E. (Evert), Bochdanovits, Z. (Zoltan), Tol, M.J.D. (Marie-José) van, Veltman, D.J. (Dick), Zitman, F.G. (Frans), Buchem, M.A. (Mark) van, Wee, N.J. (Nic) van der, Opmeer, E.M. (Esther), Demenescu, L.R. (L.), Aleman, A. (André), Penninx, B.W.J.H. (Brenda), and Hoogendijk, W.J.G. (Witte)

Abstract

Major depressive disorder (MDD) is characterized by affective symptoms and cognitive impairments, which have been associated with changes in limbic and prefrontal activity as well as with monoaminergic neurotransmission. A genome-wide association study implicated the polymorphism rs2522833 in the piccolo (PCLO) gene-involved in monoaminergic neurotransmission-as a risk factor for MDD. However, the role of the PCLO risk allele in emotion processing and executive function or its effect on their neural substrate has never been studied. We used functional magnetic resonance imaging (fMRI) to investigate PCLO risk allele carriers vs noncarriers during an emotional face processing task and a visuospatial planning task in 159 current MDD patients and healthy controls. In PCLO risk allele carriers, we found increased activity in the left amygdala during processing of angry and sad faces compared with noncarriers, independent of psychopathological status. During processing of fearful faces, the PCLO

Published
2012
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7. A fine-mapping study of 7 top scoring genes from a GWAS for major depressive disorder

Author

Verbeek, E.C. (Eva), Bakker, I.M.C. (Ingrid), Bevova, M.R. (Marianna), Bochdanovits, Z. (Zoltan), Rizzu, P. (Patrizia), Sondervan, D. (David), Willemsen, G.A.H.M. (Gonneke), Geus, E.J.C. (Eco) de, Smit, J.H. (Johannes), Penninx, B.W.J.H. (Brenda), Boomsma, D.I. (Dorret), Hoogendijk, W.J.G. (Witte), Heutink, P. (Peter), Verbeek, E.C. (Eva), Bakker, I.M.C. (Ingrid), Bevova, M.R. (Marianna), Bochdanovits, Z. (Zoltan), Rizzu, P. (Patrizia), Sondervan, D. (David), Willemsen, G.A.H.M. (Gonneke), Geus, E.J.C. (Eco) de, Smit, J.H. (Johannes), Penninx, B.W.J.H. (Brenda), Boomsma, D.I. (Dorret), Hoogendijk, W.J.G. (Witte), and Heutink, P. (Peter)

Abstract

Major depressive disorder (MDD) is a psychiatric disorder that is characterized -amongst others- by persistent depressed mood, loss of interest and pleasure and psychomotor retardation. Environmental circumstances have proven to influence the aetiology of the disease, but MDD also has an estimated 40% heritability, probably with a polygenic background. In 2009, a genome wide association study (GWAS) was performed on the Dutch GAIN-MDD cohort. A non-synonymous coding single nucleotide polymorphism (SNP) rs2522833 in the PCLO gene became only nominally significant after post-hoc analysis with an Australian cohort which used similar ascertainment. The absence of genome-wide significance may be caused by low SNP coverage of genes. To increase SNP coverage to 100% for common variants (m.a.f.>0.1, r2>0.8), we selected seven genes from the GAIN-MDD GWAS: PCLO, GZMK, ANPEP, AFAP1L1, ST3GAL6, FGF14 and PTK2B. We genotyped 349 SNPs and obtained the lowest P-value for rs2715147 in PCLO at P = 6.8E-7. We imputed, filling in missing genotypes, after which rs2715147 and rs2715148 showed the lowest P-value at P = 1.2E-6. When we created a haplotype of these SNPs together with the non-synonymous coding SNP rs2522833, the P-value decreased to P = 9.9E-7 but was not genome wide significant. Although our study did not identify a more strongly associated variant, the results for PCLO suggest that the causal variant is in high LD with rs2715147, rs2715148 and rs2522833.

Published
2012
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8. Comprehensive mRNA expression profiling distinguishes tauopathies and identifies shared molecular pathways

Author

Bronner, I.F., Bochdanovits, Z. (Zoltan), Rizzu, P. (Patrizia), Kamphorst, W. (Wouter), Ravid, R. (Rivka), Swieten, J.C. (John) van, Heutink, P. (Peter), Bronner, I.F., Bochdanovits, Z. (Zoltan), Rizzu, P. (Patrizia), Kamphorst, W. (Wouter), Ravid, R. (Rivka), Swieten, J.C. (John) van, and Heutink, P. (Peter)

Abstract

Background: Understanding the aetiologies of neurodegenerative diseases such as Alzheimer's disease (AD), Pick's disease (PiD), Progressive Supranuclear Palsy (PSP) and Frontotemporal dementia (FTD) is often hampered by the considerable clinical and molecular overlap between these diseases and normal ageing. The development of high throughput genomic technologies such as microarrays provide a new molecular tool to gain insight in the complexity and relationships between diseases, as they provide data on the simultaneous activity of multiple genes, gene networks and cellular pathways. Methodology/Principal Findings: We have constructed genome wide expression profiles from snap frozen post-mortem tissue from the medial temporal lobe of patients with four neurodegenerative disorders (5 AD, 5 PSP, 5 PiD and 5 FTD patients) and 5 control subjects. All patients were matched for age, gender, ApoE-e and MAPT (tau) haplotype. From all groups a total of 790 probes were shown to be differently expressed when compared to control individuals. The results from these experiments were then used to investigate the correlations between clinical, pathological and molecular findings. From the 790 identified probes we extracted a gene set of 166 probes whose expression could discriminate between these disorders and normal ageing. Conclusions/Significance: From genome wide expression profiles we extracted a gene set of 166 probes whose expression could discriminate between neurological disorders and normal ageing. This gene set can be further developed into an accurate microarray-based classification test. Furthermore, from this dataset we extracted a disease specific set of genes and identified two aging related transcription factors (FOXO1A and FOXO3A) as possible drug targets related to neurodegenerative disease.

Published
2009
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9. Variation at GRN3′-UTR rs5848 is not associated with a risk of frontotemporal lobar degenerationin Dutch population

Author

Simón-Sánchez, J. (Javier), Seelaar, H. (Harro), Bochdanovits, Z. (Zoltan), Deeg, D.J.H. (Dorly), Swieten, J.C. (John) van, Heutink, P. (Peter), Simón-Sánchez, J. (Javier), Seelaar, H. (Harro), Bochdanovits, Z. (Zoltan), Deeg, D.J.H. (Dorly), Swieten, J.C. (John) van, and Heutink, P. (Peter)

Abstract

Background: A single nucleotide polymorphism (rs5848) located in the 3′- untranslated region of GRN has recently been associated with a risk of frontotemporal lobar degeneration (FTLD) in North American population particularly in pathologically confirmed cases with neural inclusions immunoreactive for ubiquitin and TAR DNA-binding protein 43 (TDP-43), but negative for tau and alpha-synuclein (FTLD-TDP). Methodology/Principal Findings: In an effort to replicate these results in a different population, rs5848 was genotyped in 256 FTLD cases and 1695 controls from the Netherlands. Single SNP gender-adjusted logistic regression analysis revealed no significant association between variation at rs5848 and FTLD. Fisher's exact test, failed to find any significant association between rs5848 and a subset of 23 pathology confirmed FTLD-TDP cases. Conclusions/Significance: The evidence presented here suggests that variation at rs5848 does not contribute to the etiology of FTLD in the Dutch population.

Published
2009
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