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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. A LRSAM1 mutation links Charcot-Marie-Tooth type 2 to Parkinson's disease

Author

Aerts, M.B. (Marjolein B.), Weterman, M.A.J., Quadri, M. (Marialuisa), Schelhaas, H.J. (Helenius), Bloem, B.R. (Bastiaan), Esselink, R.A. (Rianne A.), Baas, F. (Frank), Bonifati, V. (Vincenzo), Warrenburg, B. (Bart) van de, Aerts, M.B. (Marjolein B.), Weterman, M.A.J., Quadri, M. (Marialuisa), Schelhaas, H.J. (Helenius), Bloem, B.R. (Bastiaan), Esselink, R.A. (Rianne A.), Baas, F. (Frank), Bonifati, V. (Vincenzo), and Warrenburg, B. (Bart) van de

Abstract

LRSAM1 mutations have been found in recessive and dominant forms of Charcot-Marie-Tooth disease. Within one generation of the original Dutch family in which the dominant LRSAM1 mutation was identified, three of the five affected family members have developed Parkinson's disease between ages 50 and 65 years, many years after neuropathy onset. We speculate that this late-onset parkinsonism is part of the LRSAM1 phenotype, thus associating a hitherto peripheral nerve disease with a central nervous system phenotype. How the mutated Lrsam1 protein, which normally has E3 ubiquitin ligase activity and is expressed in the nervous system, impacts on substantia nigra neurons is unclear.

Published
2016
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3. 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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4. Mutations in SLC30A10 cause parkinsonism and dystonia with hypermanganesemia, polycythemia, and chronic liver disease

Author

Quadri, M. (Marialuisa), Federico, A. (Antonio), Zhao, T. (Tianna), Breedveld, G.J. (Guido), Battisti, C. (Carla), Delnooz, C.C.S. (Cathérine), Severijnen, E.A.W.F.M. (Lies-Anne), Di Toro Mammarella, L. (Lara), Mignarri, A. (Andrea), Monti, L. (Lucia), Sanna, S. (Serena), Lu, P. (Peng), Punzo, F. (Francesca), Cossu, G. (Giovanni), Willemsen, R. (Rob), Rasi, G., Oostra, B.A. (Ben), Warrenburg, B. (Bart) van de, Bonifati, V. (Vincenzo), Quadri, M. (Marialuisa), Federico, A. (Antonio), Zhao, T. (Tianna), Breedveld, G.J. (Guido), Battisti, C. (Carla), Delnooz, C.C.S. (Cathérine), Severijnen, E.A.W.F.M. (Lies-Anne), Di Toro Mammarella, L. (Lara), Mignarri, A. (Andrea), Monti, L. (Lucia), Sanna, S. (Serena), Lu, P. (Peng), Punzo, F. (Francesca), Cossu, G. (Giovanni), Willemsen, R. (Rob), Rasi, G., Oostra, B.A. (Ben), Warrenburg, B. (Bart) van de, and Bonifati, V. (Vincenzo)

Abstract

Manganese is essential for several metabolic pathways but becomes toxic in excessive amounts. Manganese levels in the body are therefore tightly regulated, but the responsible protein(s) remain incompletely known. We studied two consanguineous families with neurologic disorders including juvenile-onset dystonia, adult-onset parkinsonism, severe hypermanganesemia, polycythemia, and chronic hepatic disease, including steatosis and cirrhosis. We localized the genetic defect by homozygosity mapping and then identified two different homozygous frameshift SLC30A10 mutations, segregating with disease. SLC30A10 is highly expressed in the liver and brain, including in the basal ganglia. Its encoded protein belongs to a large family of membrane transporters, mediating the efflux of divalent cations from the cytosol. We show the localization of SLC30A10 in normal human liver and nervous system, and its depletion in liver from one affected individual. Our in silico analyses suggest that SLC30A10 possesses substrate specificity different from its closest (zinc-transporting) homologs. We also show that the expression of SLC30A10 and the levels of the encoded protein are markedly induced by manganese in vitro. The phenotype associated with SLC30A10 mutations is broad, including neurologic, hepatic, and hematologic disturbances. Intrafamilial phenotypic variability is also present. Chelation therapy can normalize the manganesemia, leading to marked clinical improvements. In conclusion, we show that SLC30A10 mutations cause a treatable recessive disease

Published
2012
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5. Breakpoint mapping of 13 large parkin deletions/duplications reveals an exon 4 deletion and an exon 7 duplication as founder mutations

Author

Elfferich, P.C., Verleun-Mooijman, M.C. (Marja), Maat-Kievit, A.A. (Anneke), Warrenburg, B. (Bart) van de, Abdo, W.F. (Wilson), Eshuis, S.A. (Sylvia), Leenders, K.L. (Klaus), Hovestadt, A. (Ad), Zijlmans, J.C.M. (Jan), Stroy, J.-P.M., Swieten, J.C. (John) van, Boon, A.J.W. (Andrea), Engelen, K. (Klaartje) van, Verschuuren-Bemelmans, C.C. (Corien), Lesnik-Oberstein, S.A.J. (Saskia), Tassorelli, C. (Cristina), Lopiano, L. (Leonardo), Bonifati, V. (Vincenzo), Dooijes, D. (Dennis), Minkelen, R. (Rick) van, Elfferich, P.C., Verleun-Mooijman, M.C. (Marja), Maat-Kievit, A.A. (Anneke), Warrenburg, B. (Bart) van de, Abdo, W.F. (Wilson), Eshuis, S.A. (Sylvia), Leenders, K.L. (Klaus), Hovestadt, A. (Ad), Zijlmans, J.C.M. (Jan), Stroy, J.-P.M., Swieten, J.C. (John) van, Boon, A.J.W. (Andrea), Engelen, K. (Klaartje) van, Verschuuren-Bemelmans, C.C. (Corien), Lesnik-Oberstein, S.A.J. (Saskia), Tassorelli, C. (Cristina), Lopiano, L. (Leonardo), Bonifati, V. (Vincenzo), Dooijes, D. (Dennis), and Minkelen, R. (Rick) van

Abstract

Early-onset Parkinson's disease (EOPD) has been associated with recessive mutations in parkin (PARK2). About half of the mutations found in parkin are genomic rearrangements, i.e., large deletions or duplications. Although many different rearrangements have been found in parkin before, the exact breakpoints involving these rearrangements are rarely mapped. In the present study, the exact breakpoints of 13 different parkin deletions/duplications, detected in 13 patients out of a total screened sample of 116 EOPD patients using Multiple Ligation Probe Amplification (MLPA) analysis, were mapped using real time quantitative polymerase chain reaction (PCR), long-range PCR and sequence analysis. Deletion/duplication-specific PCR tests were developed as a rapid and low cost tool to confirmMLPA results and to test family members or patients with similar parkin deletions/duplications. Besides several different deletions, an exon 3 deletion, an exon 4 deletion and an exon 7 duplication were found in multiple families. Haplotype analysis in four families showed that a common haplotype of 1.2 Mb could be distinguished for the ex

Published
2011
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