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21 results on '"R’Bibo L."'

1. Finding genetically-supported drug targets for Parkinson’s disease using Mendelian randomization of the druggable genome

Author

Storm, Catherine S., Kia, Demis A., Almramhi, Mona M., Bandres-Ciga, Sara, Finan, Chris, Noyce, A. J., Kaiyrzhanov, R., Middlehurst, B., Tan, M., Houlden, H., Morris, H. R., Plun-Favreau, H., Holmans, P., Hardy, J., Trabzuni, D., Quinn, J., Bubb, V., Mok, K. Y., Kinghorn, K. J., Lewis, P., Schreglmann, S. R., Lovering, R., R'Bibo, L., Manzoni, C., Rizig, M., Ryten, M., Guelfi, S., Escott-Price, V., Chelban, V., Foltynie, T., Williams, N., Morrison, K. E., Clarke, C., Harvey, K., Jacobs, B. M., Brice, Alexis, Danjou, F., Lesage, S., Corvol, J. C., Martinez, M., Schulte, C., Brockmann, K., Simón-Sánchez, J., Heutink, P., Rizzu, P., Sharma, M., Gasser, T., Schneider, S. A., Cookson, M. R., Blauwendraat, C., Craig, D. W., Billingsley, K., Makarious, M. B., Narendra, D. P., Faghri, F., Gibbs, J. R., Hernandez, D. G., Van Keuren-Jensen, K., Shulman, J. M., Iwaki, H., Leonard, H. L., Nalls, M. A., Robak, L., Bras, J., Guerreiro, R., Lubbe, S., Troycoco, T., Finkbeiner, S., Mencacci, N. E., Lungu, C., Singleton, A. B., Scholz, S. W., Reed, X., Uitti, R. J., Ross, O. A., Grenn, F. P., Moore, A., Alcalay, R. N., Wszolek, Z. K., Gan-Or, Z., Rouleau, G. A., Krohn, L., Mufti, K., van Hilten, J. J., Marinus, J., Adarmes-Gómez, A. D., Aguilar Barberà, Miquel, Álvarez Angulo, Iñaki, Alvarez, V., Barrero, F. J., Yarza, J. A. B., Bernal-Bernal, I., Blázquez Estrada, M, Bonilla-Toribio, M., Botía, J. A., Boungiorno, M. T., Buiza-Rueda, Dolores, Cámara, A., Carrillo, F., Carrión-Claro, M., Cerdan, D., Clarimón, Jordi, Compta, Y., Diez-Fairen, M., Dols-Icardo, Oriol, Duarte, J., Duran, R., Escamilla-Sevilla, F., Ezquerra, M., Feliz, C., Fernández, M., Fernández-Santiago, R., Garcia, C., García-Ruiz, P., Gómez-Garre, P., Heredia, M. J. G., Gonzalez-Aramburu, I., Pagola, A. G., Hoenicka, J., Infante, J., Jesús, S., Jimenez-Escrig, A., Kulisevsky, Jaime, Labrador-Espinosa, M. A., Lopez-Sendon, J. L., de Munain Arregui, A. L., Macias, D., Torres, I. M., Marín, J., Marti, M. J., Martínez-Castrillo, J. C., Méndez-del-Barrio, C., González, M. M., Mata, M., Mínguez, A., Mir, P., Rezola, E. M., Muñoz, E., Pagonabarraga, J., Pastor, P., Errazquin, F. P., Periñán-Tocino, T., Ruiz-Martínez, J., Ruz, C., Rodriguez, A. S., Sierra, M., Suarez-Sanmartin, E., Tabernero, C., Tartari, J. P., Tejera-Parrado, C., Tolosa, E., Valldeoriola, F., Vargas-González, L., Vela, Lydia, Vives, F., Zimprich, A., Pihlstrom, L., Toft, M., Taba, P., Koks, S., Hassin-Baer, S., Majamaa, K., Siitonen, A., Tienari, P., Okubadejo, N. U., Ojo, O. O., Shashkin, C., Zharkinbekova, N., Akhmetzhanov, V., Kaishybayeva, G., Karimova, A., Khaibullin, T., Lynch, T. L., Hingorani, Aroon, Wood, Nicholas W.., Universitat Autònoma de Barcelona, Rosetrees Trust, John Black Charitable Foundation, University College London, King Abdulaziz University, National Institute for Health Research (UK), Universidad de Cantabria, HUS Neurocenter, Department of Neurosciences, and Clinicum

Subjects
Aging, Science, Quantitative Trait Loci, General Physics and Astronomy, Neurodegenerative, 3124 Neurology and psychiatry, General Biochemistry, Genetics and Molecular Biology, Article, Cohort Studies, Risk Factors, Genetics research, Genetics, 2.1 Biological and endogenous factors, Humans, Genetic Predisposition to Disease, Aetiology, Multidisciplinary, Genome, Parkinson's Disease, Genome, Human, Prevention, 3112 Neurosciences, Neurosciences, Brain, Genetic Variation, Parkinson Disease, General Chemistry, Mendelian Randomization Analysis, International Parkinson’s Disease Genomics Consortium, Brain Disorders, Good Health and Well Being, Gene Expression Regulation, Neurology, 5.1 Pharmaceuticals, Case-Control Studies, Neurological, Disease Progression, Development of treatments and therapeutic interventions, Human, Biotechnology
Abstract

Parkinson’s disease is a neurodegenerative movement disorder that currently has no disease-modifying treatment, partly owing to inefficiencies in drug target identification and validation. We use Mendelian randomization to investigate over 3,000 genes that encode druggable proteins and predict their efficacy as drug targets for Parkinson’s disease. We use expression and protein quantitative trait loci to mimic exposure to medications, and we examine the causal effect on Parkinson’s disease risk (in two large cohorts), age at onset and progression. We propose 23 drug-targeting mechanisms for Parkinson’s disease, including four possible drug repurposing opportunities and two drugs which may increase Parkinson’s disease risk. Of these, we put forward six drug targets with the strongest Mendelian randomization evidence. There is remarkably little overlap between our drug targets to reduce Parkinson’s disease risk versus progression, suggesting different molecular mechanisms. Drugs with genetic support are considerably more likely to succeed in clinical trials, and we provide compelling genetic evidence and an analysis pipeline to prioritise Parkinson’s disease drug development., There is currently no disease-modifying treatment for Parkinson’s disease, a common neurodegenerative disorder. Here, the authors use genetic variation associated with gene and protein expression to find putative drug targets for Parkinson’s disease using Mendelian randomization of the druggable genome.

Published
2021

2. Human-lineage-specific genomic elements are associated with neurodegenerative disease and APOE transcript usage

Author

Chen, Z., Zhang, D., Reynolds, R.H., Gustavsson, E.K., García-Ruiz, S., D'Sa, K., Fairbrother-Browne, A., Vandrovcova, J., Noyce, A.J., Kaiyrzhanov, R., Middlehurst, B., Kia, D.A., Tan, M., Morris, H.R., Plun-Favreau, H., Holmans, P., Trabzuni, D., Bras, J., Quinn, J., Mok, K.Y., Kinghorn, K.J., Billingsley, K., Wood, N.W., Lewis, P., Schreglmann, S., Guerreiro, Rita, Lovering, R., R'Bibo, L., Manzoni, C., Rizig, M., Guelfi, S., Escott-Price, V., Chelban, V., Foltynie, T., Williams, N., Brice, A., Danjou, F., Lesage, S., Corvol, Jean-Christophe, Martinez, M., Schulte, C., Brockmann, K., Simón-Sánchez, J., Heutink, P., Rizzu, P., Sharma, M., Gasser, T., Nicolas, A., Cookson, M. R, Bandres-Ciga, S., Blauwendraat, Cornelis, Craig, David W, Faghri, F., Gibbs, J.R., Hernandez, D.G., Van Keuren-Jensen, K., Shulman, J.M., Leonard, H.L., Nalls, M.A., Robak, L., Lubbe, S., Finkbeiner, S., Mencacci, N.E., Lungu, C., Singleton, A. B., Scholz, S.W., Reed, X., Alcalay, Roy N, Gan-Or, Z., Rouleau, G.A., Krohn, L., van Hilten, J.J., Marinus, J., Adarmes-Gómez, A.D, Aguilar Barberà, Miquel, Alvarez, Ignacio, Alvarez, V., Barrero, F. J, Yarza, J.A.B., Bernal-Bernal, I., Blazquez, M., Bonilla-Toribio, Marta, Botía, J., Boungiorno, M.T., Buiza-Rueda, Dolores, Cámara, Ana, Carrillo, F., Carrión-Claro, M., Cerdan, D., Clarimón, Jordi, Compta, Yaroslau, Diez-Fairen, M., Dols Icardo, Oriol, Duarte, J., Duran, Raquel, Escamilla-Sevilla, F., Ezquerra, M., Feliz, C., Fernández, M., Fernández-Santiago, R., Garcia, C., García-Ruiz, P., Gómez-Garre, P., Heredia, M.J.G., Gonzalez-Aramburu, I., Pagola, A.G., Hoenicka, J., Infante, J., Jesús, S., Jimenez-Escrig, A., Kulisevsky, Jaime, Labrador-Espinosa, Miguel A, Lopez-Sendon, J.L., de Munain Arregui, A.L., Macias, D., Torres, I.M., Marín, J., Marti, M.J., Martínez-Castrillo, J.C., Méndez-del-Barrio, C., González, M.M., Mata, M., Mínguez, A., Mir, P., Rezola, E.M., Muñoz, E., Pagonabarraga Mora, Javier, Pastor, P., Errazquin, F.P., Periñán-Tocino, T., Ruiz-Martínez, J., Ruz, C., Rodriguez, A.S., Sierra, M., Suarez-Sanmartin, E., Tabernero, C., Tartari, J. P., Tejera-Parrado, C., Tolosa, E., Valldeoriola, F., Vargas-González, L., Vela, L., Vives, F., Zimprich, Alexander, Pihlstrom, L., Toft, M., Koks, S., Taba, P., Hassin-Baer, S., Hardy, J., Houlden, Henry, Gagliano Taliun, S. A., Ryten, M., Universitat Autònoma de Barcelona, Universidad de Cantabria, Lord Leonard and Lady Estelle Wolfson Foundation, Medical Research Council (UK), Dementia Research Institute (UK), Alzheimer Society, Alzheimer's Research UK, Wellcome Trust, Dolby Family Fund, National Institute for Health Research (UK), NIHR Biomedical Research Centre (UK), Agencia Estatal de Investigación (España), Fundación Séneca, and Gobierno de la Región de Murcia

Subjects
0301 basic medicine, Apolipoprotein E, Aging, Messenger, General Physics and Astronomy, Neurodegenerative, Alzheimer's Disease, Genome, Linkage Disequilibrium, Negative selection, 0302 clinical medicine, 2.1 Biological and endogenous factors, Aetiology, health care economics and organizations, Conserved Sequence, Phylogeny, Multidisciplinary, Brain, Neurodegenerative Diseases, Single Nucleotide, Alzheimer's disease, Phenotype, International Parkinson’s Disease Genomics Consortium, Neurological, Regression Analysis, Long Noncoding, DNA, Intergenic, RNA, Long Noncoding, Human, Biotechnology, Lineage (genetic), Science, 1.1 Normal biological development and functioning, Computational biology, Biology, Polymorphism, Single Nucleotide, Article, General Biochemistry, Genetics and Molecular Biology, Chromosomes, 03 medical and health sciences, Apolipoproteins E, Underpinning research, Alzheimer Disease, Genetic variation, Genetics, Acquired Cognitive Impairment, Humans, RNA, Messenger, Polymorphism, Gene, Whole genome sequencing, Intergenic, Pair 19, Genome, Human, Human Genome, Neurosciences, Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD), Molecular Sequence Annotation, General Chemistry, DNA, Introns, Brain Disorders, 030104 developmental biology, Gene Ontology, RNA, Dementia, Chromosomes, Human, Pair 19, 030217 neurology & neurosurgery
Abstract

Knowledge of genomic features specific to the human lineage may provide insights into brain-related diseases. We leverage high-depth whole genome sequencing data to generate a combined annotation identifying regions simultaneously depleted for genetic variation (constrained regions) and poorly conserved across primates. We propose that these constrained, non-conserved regions (CNCRs) have been subject to human-specific purifying selection and are enriched for brain-specific elements. We find that CNCRs are depleted from protein-coding genes but enriched within lncRNAs. We demonstrate that per-SNP heritability of a range of brain-relevant phenotypes are enriched within CNCRs. We find that genes implicated in neurological diseases have high CNCR density, including APOE, highlighting an unannotated intron-3 retention event. Using human brain RNA-sequencing data, we show the intron-3-retaining transcript to be more abundant in Alzheimer’s disease with more severe tau and amyloid pathological burden. Thus, we demonstrate potential association of human-lineage-specific sequences in brain development and neurological disease., Knowledge of genomic features specific to humans may be important for understanding disease. Here the authors demonstrate a potential role for these human-lineage-specific sequences in brain development and neurological disease.

Published
2021

3. Investigation of Autosomal Genetic Sex Differences in Parkinson's Disease

Author

Leonard H, Lake J, Kim JJ, Gibbs JR, Ruskey JA, Pihlstrøm L, Eerola-Rautio J, Tienari PJ, Grosset DG, Wood N, Noyce AJ, Middlehurst B, Kia DA, Tan M, Houlden H, Storm CS, Morris HR, Plun-Favreau H, Holmans P, Hardy J, Trabzuni D, Quinn J, Bubb V, Mok KY, Kinghorn KJ, Wood NW, Lewis P, Schreglmann SR, Lovering R, R'Bibo L, Manzoni C, Rizig M, Ryten M, Guelfi S, Escott-Price V, Chelban V, Foltynie T, Williams N, Morrison KE, Clarke C, Harvey K, Jacobs BM, Brice A, Danjou F, Lesage S, Corvol JC, Martinez M, Schulte C, Brockmann K, Simón-Sánchez J, Heutink P, Rizzu P, Sharma M, Gasser T, Schneider SA, Cookson MR, Bandres-Ciga S, Blauwendraat C, Craig DW, Billingsley K, Makarious MB, Narendra DP, Faghri F, Hernandez DG, Van Keuren-Jensen K, Shulman JM, Iwaki H, Leonard HL, Nalls MA, Robak L, Bras J, Guerreiro R, Lubbe S, Troycoco T, Finkbeiner S, Mencacci NE, Lungu C, Singleton AB, Scholz SW, Reed X, Uitti RJ, Ross OA, Grenn FP, Moore A, Alcalay RN, Wszolek ZK, Gan-Or Z, Rouleau GA, Krohn L, Mufti K, van Hilten JJ, Marinus J, Adarmes-Gómez AD, Aguilar M, Alvarez I, Alvarez V, Barrero FJ, Yarza JAB, Bernal-Bernal I, Blazquez M, Bonilla-Toribio M, Botía JA, Boungiorno MT, Buiza-Rueda D, Cámara A, Carrillo F, Carrión-Claro M, Cerdan D, Clarimón J, Compta Y, Diez-Fairen M, Dols-Icardo O, Duarte J, Duran R, Escamilla-Sevilla F, Ezquerra M, Feliz C, Fernández M, Fernández-Santiago R, Garcia C, García-Ruiz P, Gómez-Garre P, Heredia MJG, Gonzalez-Aramburu I, Pagola AG, Hoenicka J, Infante J, Jesús S, Jimenez-Escrig A, Kulisevsky J, Labrador-Espinosa MA, Lopez-Sendon JL, de Munain Arregui AL, Macias D, Torres IM, Marín J, Marti MJ, Martínez-Castrillo JC, Méndez-Del-Barrio C, González MM, Mata M, Mínguez A, Mir P, Rezola EM, Muñoz E, Pagonabarraga J, Pastor P, Errazquin FP, Periñán-Tocino T, Ruiz-Martínez J, Ruz C, Rodriguez AS, Sierra M, Suarez-Sanmartin E, Tabernero C, Tartari JP, Tejera-Parrado C, Tolosa E, Valldeoriola F, Vargas-González L, Vela L, Vives F, Zimprich A, Pihlstrom L, Toft M, Taba P, Koks S, Hassin-Baer S, Majamaa K, Siitonen A, Tienari P, Okubadejo NU, Ojo OO, Kaiyrzhanov R, Shashkin C, Zharkinbekova N, Akhmetzhanov V, Kaishybayeva G, Karimova A, Khaibullin T, Lynch TL, and International Parkinson's Disease Genomics Consortium (IPDGC)

Abstract

OBJECTIVE: Parkinson's disease (PD) is a complex neurodegenerative disorder. Men are on average ~ 1.5 times more likely to develop PD compared to women with European ancestry. Over the years, genomewide association studies (GWAS) have identified numerous genetic risk factors for PD, however, it is unclear whether genetics contribute to disease etiology in a sex-specific manner. METHODS: In an effort to study sex-specific genetic factors associated with PD, we explored 2 large genetic datasets from the International Parkinson's Disease Genomics Consortium and the UK Biobank consisting of 13,020 male PD cases, 7,936 paternal proxy cases, 89,660 male controls, 7,947 female PD cases, 5,473 maternal proxy cases, and 90,662 female controls. We performed GWAS meta-analyses to identify distinct patterns of genetic risk contributing to disease in male versus female PD cases. RESULTS: In total, 19 genomewide significant regions were identified and no sex-specific effects were observed. A high genetic correlation between the male and female PD GWAS were identified (rg = 0.877) and heritability estimates were identical between male and female PD cases (~ 20%). INTERPRETATION: We did not detect any significant genetic differences between male or female PD cases. Our study does not support the notion that common genetic variation on the autosomes could explain the difference in prevalence of PD between males and females cases at least when considering the current sample size under study. Further studies are warranted to investigate the genetic architecture of PD explained by X and Y chromosomes and further evaluate environmental effects that could potentially contribute to PD etiology in male versus female patients. ANN NEUROL 2021;90:41-48.

Published
2021

4. Regulatory sites for splicing in human basal ganglia are enriched for disease-relevant information

Author

Guelfi S., D’Sa K., Botía J.A., Vandrovcova J., Reynolds R.H., Zhang D., Trabzuni D., Collado-Torres L., Thomason A., Quijada Leyton P., Gagliano Taliun S.A., Nalls M.A., Noyce A.J., Nicolas A., Cookson M.R., Bandres-Ciga S., Gibbs J.R., Hernandez D.G., Singleton A.B., Reed X., Leonard H., Blauwendraat C., Faghri F., Bras J., Guerreiro R., Tucci A., Kia D.A., Houlden H., Plun-Favreau H., Mok K.Y., Wood N.W., Lovering R., R’Bibo L., Rizig M., Chelban V., Tan M., Morris H.R., Middlehurst B., Quinn J., Billingsley K., Holmans P., Kinghorn K.J., Lewis P., Escott-Price V., Williams N., Foltynie T., Brice A., Danjou F., Lesage S., Corvol J.-C., Martinez M., Giri A., Schulte C., Brockmann K., Simón-Sánchez J., Heutink P., Gasser T., Rizzu P., Sharma M., Shulman J.M., Robak L., Lubbe S., Mencacci N.E., Finkbeiner S., Lungu C., Scholz S.W., Gan-Or Z., Rouleau G.A., Krohan L., van Hilten J.J., Marinus J., Adarmes-Gómez A.D., Bernal-Bernal I., Bonilla-Toribio M., Buiza-Rueda D., Carrillo F., Carrión-Claro M., Mir P., Gómez-Garre P., Jesús S., Labrador-Espinosa M.A., Macias D., Vargas-González L., Méndez-del-Barrio C., Periñán-Tocino T., Tejera-Parrado C., Diez-Fairen M., Aguilar M., Alvarez I., Boungiorno M.T., Carcel M., Pastor P., Tartari J.P., Alvarez V., González M.M., Blazquez M., Garcia C., Suarez-Sanmartin E., Barrero F.J., Rezola E.M., Yarza J.A.B., Pagola A.G., Arregui A.L.M., Ruiz-Martínez J., Cerdan D., Duarte J., Clarimón J., Dols-Icardo O., Infante J., Marín J., Kulisevsky J., Pagonabarraga J., Gonzalez-Aramburu I., Rodriguez A.S., Sierra M., Duran R., Ruz C., Vives F., Escamilla-Sevilla F., Mínguez A., Cámara A., Compta Y., Ezquerra M., Marti M.J., Fernández M., Muñoz E., Fernández-Santiago R., Tolosa E., Valldeoriola F., García-Ruiz P., Heredia M.J.G., Errazquin F.P., Hoenicka J., Jimenez-Escrig A., Martínez-Castrillo J.C., Lopez-Sendon J.L., Torres I.M., Tabernero C., Vela L., Zimprich A., Pihlstrom L., Koks S., Taba P., Majamaa K., Siitonen A., Okubadejo N.U., Ojo O.O., Forabosco P., Walker R., Small K.S., Smith C., Ramasamy A., Hardy J., Weale M.E., and Ryten M.

Subjects
medicine, RNA splicing, phenotype, brain, genotype, Quantitative Trait Loci, genetic analysis, Polymorphism, Single Nucleotide, Article, genetic regulation, mental disease, transcriptomics, quantitative trait locus, expression quantitative trait locus, single nucleotide polymorphism, Humans, genetics, human, reproducibility, Alleles, Neurons, genome-wide association study, human cell, allele, Putamen, Reproducibility of Results, RNA sequencing, Parkinson Disease, gene expression regulation, cell, cohort analysis, neurologic disease, human tissue, schizophrenia, Substantia Nigra, disease incidence, physiology, gene expression, RNA, physiological response, Nervous System Diseases, nerve cell, Transcriptome, nervous system disorder, basal ganglion
Abstract

Genome-wide association studies have generated an increasing number of common genetic variants associated with neurological and psychiatric disease risk. An improved understanding of the genetic control of gene expression in human brain is vital considering this is the likely modus operandum for many causal variants. However, human brain sampling complexities limit the explanatory power of brain-related expression quantitative trait loci (eQTL) and allele-specific expression (ASE) signals. We address this, using paired genomic and transcriptomic data from putamen and substantia nigra from 117 human brains, interrogating regulation at different RNA processing stages and uncovering novel transcripts. We identify disease-relevant regulatory loci, find that splicing eQTLs are enriched for regulatory information of neuron-specific genes, that ASEs provide cell-specific regulatory information with evidence for cellular specificity, and that incomplete annotation of the brain transcriptome limits interpretation of risk loci for neuropsychiatric disease. This resource of regulatory data is accessible through our web server, http://braineacv2.inf.um.es/. © 2020, The Author(s).

Published
2020

5. Mitochondria function associated genes contribute to Parkinson’s Disease risk and later age at onset

Author

Billingsley, Kimberley J, Barbosa, Ines A, Bandres-Ciga, Sara, Quinn, John P, Bubb, Vivien J, Deshpande, Charu, Botia, Juan A, Reynolds, Regina H, Zhang, David, Simpson, Michael A, Blauwendraat, Cornelis, Gan-Or, Ziv, Gibbs, J Raphael, Nalls, Mike A, Singleton, Andrew, Ryten, Mina, Koks, Sulev, Noyce, A, Tucci, A, Middlehurst, B, Kia, D, Tan, M, Houlden, H, Morris, HR, Plun-Favreau, H, Holmans, P, Hardy, J, Trabzuni, D, Bras, J, Mok, K, Kinghorn, K, Wood, N, Lewis, P, Guerreiro, R, Loverin, R, R'Bibo, L, Rizig, M, Escott-Price, V, Chelban, V, Foltynie, T, Williams, N, Brice, A, Danjou, F, Lesage, S, Martinez, M, Giri, A, Schulte, C, Brockmann, K, Simon-Sanchez, J, Heutink, P, Rizzu, P, Sharma, M, Gasser, T, Nicolas, A, Cookson, M, Faghri, F, Hernandez, D, Shulman, J, Robak, L, Lubbe, S, Finkbeiner, S, Mencacci, N, Lungu, C, Scholz, S, Reed, X, Leonard, H, Rouleau, G, Krohan, L, van Hilten, J, Marinus, J, Adarmes-Gomez, A, Aguilar, M, Alvarez, I, Alvarez, V, Javier Barrero, F, Bergareche Yarza, J, Bernal-Bernal, I, Blazquez, M, Bonilla-Toribio Bernal, M, Boungiorne, M, Buiza-Rueda, Dolores, Camara, A, Carcel, M, Carrillo, F, Carrion-Claro, M, Cerdan, D, Clarimon, J, Compta, Y, Diez-Fairen, M, Dols-Icardo, O, Duarte, J, Duran, RI, Escamilla-Sevilla, F, Ezquerra, M, Fernandez, M, Fernandez-Santiago, R, Garcia, C, Garcia-Ruiz, P, Gomez-Garre, P, Gomez Heredia, M, Gonzalez-Aramburu, I, Gorostidi Pagola, A, Hoenicka, J, Infante, J, Jesus, S, Jimenez-Escrig, A, Kulisevsky, J, Labrador-Espinosa, M, Lopez-Sendon, J, de Munain Arregui, A Lopez, Macias, D, Martinez Torres, I, Marin, J, Jose Marti, M, Martinez-Castrillo, J, Mendez-del-Barrio, C, Menendez Gonzalez, M, Minguez, A, Mir, P, Mondragon Rezola, E, Munoz, E, Pagonabarraga, J, Pastor, P, Perez Errazquin, F, Perinan-Tocino, T, Ruiz-Martinez, J, Ruz, C, Sanchez Rodriguez, A, Sierra, M, Suarez-Sanmartin, E, Tabernero, C, Pablo Tartari, J, Tejera-Parrado, C, Tolosa, E, Valldeoriola, F, Vargas-Gonzalez, L, Vela, L, Vives, F, Zimprich, A, Pihlstrom, L, Taba, P, Majamaa, K, Siitonen, A, Okubadejo, N, Ojo, O, IPDGC, and Universidad de Cantabria

Subjects
0301 basic medicine, Mitochondrial DNA, medicine.medical_specialty, Aging, Parkinson's disease, Mitochondrial disease, Mitochondrion, Biology, Neurodegenerative, Bioinformatics, lcsh:RC346-429, Article, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Mendelian randomization, Mitophagy, medicine, Genetics, 2.1 Biological and endogenous factors, Aetiology, lcsh:Neurology. Diseases of the nervous system, Parkinson's Disease, Medical genetics, Neurosciences, medicine.disease, Brain Disorders, International Parkinson’s Disease Genomics Consortium, 030104 developmental biology, Proteostasis, Neurology, Risk factors, Neurological, Neurology (clinical), Medical genetic, 030217 neurology & neurosurgery
Abstract

Mitochondrial dysfunction has been implicated in the etiology of monogenic Parkinson’s disease (PD). Yet the role that mitochondrial processes play in the most common form of the disease; sporadic PD, is yet to be fully established. Here, we comprehensively assessed the role of mitochondrial function-associated genes in sporadic PD by leveraging improvements in the scale and analysis of PD GWAS data with recent advances in our understanding of the genetics of mitochondrial disease. We calculated a mitochondrial-specific polygenic risk score (PRS) and showed that cumulative small effect variants within both our primary and secondary gene lists are significantly associated with increased PD risk. We further reported that the PRS of the secondary mitochondrial gene list was significantly associated with later age at onset. Finally, to identify possible functional genomic associations we implemented Mendelian randomization, which showed that 14 of these mitochondrial functionassociated genes showed functional consequence associated with PD risk. Further analysis suggested that the 14 identified genes are not only involved in mitophagy, but implicate new mitochondrial processes. Our data suggests that therapeutics targeting mitochondrial bioenergetics and proteostasis pathways distinct from mitophagy could be beneficial to treating the early stage of PD., This work was supported in part by the Intramural Research Program of the National Institute on Aging, National Institutes of Health, Department of Health and Human Services; project ZO1 AG000949

Published
2019

6. Moving beyond neurons: the role of cell type-specific gene regulation in Parkinson's disease heritability

Author

Reynolds, R.H., Botia, J., Nalls, M.A., Hardy, J., Taliun, S.A.G., Ryten, M., Noyce, A.J., Nicolas, A., Cookson, M.R., Bandres-Ciga, S., Gibbs, J.R., Hernandez, D.G., Singleton, A.B., Reed, X., Leonard, H., Blauwendraat, C., Faghri, F., Bras, J., Guerreiro, R., Tucci, A., Kia, D.A., Houlden, H., Plun-Favreau, H., Mok, K.Y., Wood, N.W., Lovering, R., R'Bibo, L., Rizig, M., Chelban, V., Trabzuni, D., Tan, M., Morris, H.R., Middlehurst, B., Quinn, J., Billingsley, K., Holmans, P., Kinghorn, K.J., Lewis, P., Escott-Price, V., Williams, N., Foltynie, T., Brice, A., Danjou, F., Lesage, S., Corvol, J.C., Martinez, M., Giri, A., Schulte, C., Brockmann, K., Simon-Sanchez, J., Heutink, P., Gasser, T., Rizzu, P., Sharma, M., Shulman, J.M., Robak, L., Lubbe, S., Mencacci, N.E., Finkbeiner, S., Lungu, C., Scholz, S.W., Gan-Or, Z., Rouleau, G.A., Krohan, L., Hilten, J.J. van, Marinus, J., Adarmes-Gomez, A.D., Bernal-Bernal, I., Bonilla-Toribio, M., Buiza-Rueda, D., Carrillo, F., Carrion-Claro, M., Mir, P., Gomez-Garre, P., Jesus, S., Labrador-Espinosa, M.A., Macias, D., Vargas-Gonzalez, L., Mendez-del-Barrio, C., Perinan-Tocino, T., Tejera-Parrado, C., Diez-Fairen, M., Aguilar, M., Alvarez, I., Boungiorno, M.T., Carcel, M., Pastor, P., Tartari, J.P., Alvarez, V., Gonzalez, M.M., Blazquez, M., Garcia, C., Suarez-Sanmartin, E., Barrero, F.J., Rezola, E.M., Yarza, J.A.B., Pagola, A.G., Arregui, A.L.D., Ruiz-Martinez, J., Cerdan, D., Duarte, J., Clarimon, J., Dols-Icardo, O., Infante, J., Marin, J., Kulisevsky, J., Pagonabarraga, J., Gonzalez-Aramburu, I., Rodriguez, A.S., Sierra, M., Duran, R., Ruz, C., Vives, F., Escamilla-Sevilla, F., Minguez, A., Camara, A., Compta, Y., Ezquerra, M., Marti, M.J., Fernandez, M., Munoz, E., Fernandez-Santiago, R., Tolosa, E., Valldeoriola, F., Garcia-Ruiz, P., Heredia, M.J.G., Errazquin, F.P., Hoenicka, J., Jimenez-Escrig, A., Martinez-Castrillo, J.C., Lopez-Sendon, J.L., Torres, I.M., Tabernero, C., Vela, L., Zimprich, A., Pihlstrom, L., Koks, S., Taba, P., Majamaa, K., Siitonen, A., Okubadejo, N.U., Ojo, O.O., Pitcher, T., Anderson, T., Bentley, S., Fowdar, J., Mellick, G., Dalrymple-Alford, J., Henders, A.K., Kassam, I., Montgomery, G., Sidorenko, J., Zhang, F.T., Xue, A.L., Vallerga, C.L., Wallace, L., Wray, N.R., Yang, J., Visscher, P.M., Gratten, J., Silburn, P.A., Halliday, G., Hickie, I., Kwok, J., Lewis, S., Kennedy, M., Pearson, J., Int Parkinsons Dis Genomics, and Syst Genomics Parkinsons Dis

Published
2019

7. SNCA and mTOR Pathway Single Nucleotide Polymorphisms Interact to Modulate the Age at Onset of Parkinson's Disease

Author

Fernandez-Santiago, R., Martin-Flores, N., Antonelli, F., Cerquera, C., Moreno, V., Bandres-Ciga, S., Manduchi, E., Tolosa, E., Singleton, A.B., Moore, J.H., Noyce, A.J., Kaiyrzhanov, R., Middlehurst, B., Kia, D.A., Tan, M., Houlden, H., Morris, H.R., Plun-Favreau, H., Holmans, P., Hardy, J., Trabzuni, D., Bras, J., Quinn, J., Mok, K.Y., Kinghorn, K.J., Billingsley, K., Wood, N.W., Lewis, P., Schreglmann, S., Guerreiro, R., Lovering, R., R'Bibo, L., Manzoni, C., Rizig, M., Ryten, M., Guelfi, S., Escott-Price, V., Chelban, V., Foltynie, T., Williams, N., Morrison, K.E., Clarke, C., Brice, A., Danjou, F., Lesage, S., Corvol, J.C., Martinez, M., Schulte, C., Brockmann, K., Simoon-Saanchez, J., Heutink, P., Rizzu, P., Sharma, M., Gasser, T., Nicolas, A., Cookson, M.R., Blauwendraat, C., Craig, D.W., Faghri, F., Gibbs, J.R., Hernandez, D.G., Keuren-Jensen, K. van, Shulman, J.M., Iwaki, H., Leonard, H.L., Nalls, M.A., Robak, L., Lubbe, S., Finkbeiner, S., Mencacci, N.E., Lungu, C., Scholz, S.W., Reed, X., Alcalay, R.N., Gan-Or, Z., Rouleau, G.A., Krohn, L., Hilten, J.J. van, Marinus, J., Adarmes-Goomez, A.D., Aguilar, I., Alvarez, I., Alvarez, V., Barrero, F.J., Yarza, J.A.B., Bernal-Bernal, I., Blazquez, M., Bonilla-Toribio, M., Botia, J.A., Boungiorno, M.T., Buiza-Rueda, D., Camara, A., Carrillo, F., Carrion-Claro, M., Cerdan, D., Clarimon, J., Compta, Y., Casa, B. de la, Diez-Fairen, M., Dols-Icardo, O., Duarte, J., Duran, R., Escamilla-Sevilla, F., Ezquerra, M., Feliz, C., Fernandez, M., Garcia, C., Garcia-Ruiz, P., Gomez-Garre, P., Heredia, M.J.G., Gonzalez-Aramburu, I., Pagola, A.G., Hoenicka, J., Infante, J., Jesus, S., Jimenez-Escrig, A., Kulisevsky, J., Labrador-Espinosa, M.A., Lopez-Sendon, J.L., Arregui, A.L.D., Macias, D., Torres, I.M., Marin, J., Marti, M.J., Martinez-Castrillo, C., Mendez-del-Barrio, C., Gonzalez, M.M., Mata, M., Minguez, A., Mir, P., Rezola, E.M., Munoz, E., Pagonabarraga, J., Pascual-Sedano, B., Pastor, P., Errazquin, F.P., Perinan-Tocino, T., Ruiz-Martinez, J., Ruz, C., Rodriguez, A.S., Sierra, M., Suarez-Sanmartin, E., Tabernero, C., Tartari, J.P., Tejera-Parrado, C., Valldeoriola, F., Vargas-Gonzalez, L., Vela, L., Vives, F., Zimprich, A., Pihlstrom, L., Toft, M., Koks, S., Taba, P., Hassin-Baer, S., Malagelada, C., Int Parkinson's Dis Genomics Conso, Fundació La Marató de TV3, Michael J. Fox Foundation for Parkinson's Research, National Institutes of Health (US), Ministerio de Economía y Competitividad (España), Agencia Estatal de Investigación (España), and Ministerio de Ciencia, Innovación y Universidades (España)

Subjects
0301 basic medicine, epistasis, Male, Parkinson's disease, very elderly, alpha-synuclein, Alpha‐synuclein, regulatory associated protein of mTOR, Cohort Studies, 0302 clinical medicine, single nucleotide polymorphism, genetics, Age of Onset, Genetics, Aged, 80 and over, Polymorphism, Single Nucleoti, biology, TOR Serine-Threonine Kinases, target of rapamycin kinase, fchsd1 gene, Age at onset, Chromosome Mapping, glycogen synthase kinase 3beta, Parkinson Disease, Middle Aged, cohort analysis, LRRK2, priority journal, Neurology, chromosomal mapping, neuromodulation, mTOR, alpha-Synuclein, Female, age at onset, Signal Transduction, onset age, Adult, MTOR protein, human, protein kinase LKB1, gene locus, Genotype, multifactor dimensionality reduction, SNP, Single-nucleotide polymorphism, rps6ka2 gene, Polymorphism, Single Nucleotide, Risk Assessment, Article, brain function, 03 medical and health sciences, alpha synuclein, medicine, Humans, controlled study, Genetic Predisposition to Disease, human, ddc:610, SNCA protein, human, gene, Mechanistic target of rapamycin, PI3K/AKT/mTOR pathway, mammalian target of rapamycin, Aged, RPTOR, Epistasis, Genetic, Odds ratio, medicine.disease, major clinical study, nervous system diseases, 030104 developmental biology, mTOR signaling, biology.protein, Epistasis, pathology, Neurology (clinical), genetic predisposition, 030217 neurology & neurosurgery
Abstract

Special Issue: Focused Ultrasound in Parkinson's Disease., [Background] Single nucleotide polymorphisms (SNPs) in the α‐synuclein (SNCA ) gene are associated with differential risk and age at onset (AAO) of both idiopathic and Leucine‐rich repeat kinase 2 (LRRK2)‐associated Parkinson's disease (PD). Yet potential combinatory or synergistic effects among several modulatory SNPs for PD risk or AAO remain largely underexplored., [Objectives] The mechanistic target of rapamycin (mTOR ) signaling pathway is functionally impaired in PD. Here we explored whether SNPs in the mTOR pathway, alone or by epistatic interaction with known susceptibility factors, can modulate PD risk and AAO., [Methods] Based on functional relevance, we selected a total of 64 SNPs mapping to a total of 57 genes from the mTOR pathway and genotyped a discovery series cohort encompassing 898 PD patients and 921 controls. As a replication series, we screened 4170 PD and 3014 controls available from the International Parkinson's Disease Genomics Consortium., [Results] In the discovery series cohort, we found a 4‐loci interaction involving STK11 rs8111699, FCHSD1 rs456998, GSK3B rs1732170, and SNCA rs356219, which was associated with an increased risk of PD (odds ratio = 2.59, P, [Conclusions] These findings indicate that genetic variability in the mTOR pathway contributes to SNCA effects in a nonlinear epistatic manner to modulate differential AAO in PD, unraveling the contribution of this cascade in the pathogenesis of the disease. © 2019 International Parkinson and Movement Disorder Society, Funding Information; Fundació la Marató de TV3. Grant Number: 60510; Michael J. Fox Foundation for Parkinson's Research. Grant Numbers: Dyskinesia Challenge 2014, MJF_PPMI_10_001, PI044024; National Institutes of Health. Grant Number: LM010098; Secretaría de Estado de Investigación, Desarrollo e Innovación. Grant Number: SAF2014‐57160R and SAF2017‐88812R.

Published
2019

8. SNCA and mTOR Pathway Single Nucleotide Polymorphisms Interact to Modulate the Age at Onset of Parkinson's Disease

Author

Martin-Flores, N, Antonelli, F, Cerquera, C, Moreno, V, Manduchi, E, Moore, JH, Noyce, AJ, Kaiyrzhanov, R, Middlehurst, B, Kia, DA, Tan, M, Houlden, H, Morris, HR, Plun-Favreau, H, Holmans, P, Hardy, J, Trabzuni, D, Bras, J, Quinn, J, Mok, KY, Kinghorn, KJ, Billingsley, K, Wood, NW, Lewis, P, Schreglmann, S, Guerreiro, R, Lovering, R, R'Bibo, L, Manzoni, C, Rizig, M, Ryten, M, Guelfi, S, Escott-Price, V, Chelban, V, Foltynie, T, Williams, N, Morrison, KE, Clarke, C, Brice, A, Danjou, F, Lesage, S, Corvol, JC, Martinez, M, Schulte, C, Brockmann, K, Simoon-Saanchez, J, Heutink, P, Rizzu, P, Sharma, M, Gasser, T, Nicolas, A, Cookson, MR, Bandres-Ciga, S, Blauwendraat, C, Craig, DW, Faghri, F, Gibbs, JR, Hernandez, DG, Van Keuren-Jensen, K, Shulman, JM, Iwaki, H, Leonard, HL, Nalls, MA, Robak, L, Lubbe, S, Finkbeiner, S, Mencacci, NE, Lungu, C, Singleton, AB, Scholz, SW, Reed, X, Alcalay, RN, Gan-Or, Z, Rouleau, GA, Krohn, L, van Hilten, JJ, Marinus, J, Adarmes-Goomez, AD, Aguilar, I, Alvarez, I, Alvarez, V, Barrero, FJ, Yarza, JAB, Bernal-Bernal, I, Blazquez, M, Bonilla-Toribio, M, Botia, JA, Boungiorno, MT, Buiza-Rueda, D, Camara, A, Carrillo, F, Carrion-Claro, M, Cerdan, D, Clarimon, J, Compta, Y, de la Casa, B, Diez-Fairen, M, Dols-Icardo, O, Duarte, J, Duran, R, Escamilla-Sevilla, F, Feliz, C, Fernandez, M, Fernandez-Santiago, R, Garcia, C, Garcia-Ruiz, P, Gomez-Garre, P, Heredia, MJG, Gonzalez-Aramburu, I, Pagola, AG, Hoenicka, J, Infante, J, Jesus, S, Jimenez-Escrig, A, Kulisevsky, J, Labrador-Espinosa, MA, Lopez-Sendon, JL, Arregui, ALD, Macias, D, Torres, IM, Marin, J, Marti, MJ, Martinez-Castrillo, C, Mendez-del-Barrio, C, Gonzalez, MM, Mata, M, Minguez, A, Mir, P, Rezola, EM, Munoz, E, Pagonabarraga, J, Pascual-Sedano, B, Pastor, P, Errazquin, FP, Perinan-Tocino, T, Ruiz-Martinez, J, Ruz, C, Rodriguez, AS, Sierra, M, Suarez-Sanmartin, E, Tabernero, C, Tartari, JP, Tejera-Parrado, C, Tolosa, E, Valldeoriola, F, Vargas-Gonzalez, L, Vela, L, Vives, F, Zimprich, A, Pihlstrom, L, Toft, M, Koks, S, Taba, P, Hassin-Baer, S, Ezquerra, M, Malagelada, C, and Int Parkinson's Dis Genomics Conso

Subjects
epistasis, alpha-synuclein, Parkinson's disease, mTOR, SNP, age at onset
Abstract

Background Single nucleotide polymorphisms (SNPs) in the alpha-synuclein (SNCA) gene are associated with differential risk and age at onset (AAO) of both idiopathic and Leucine-rich repeat kinase 2 (LRRK2)-associated Parkinson's disease (PD). Yet potential combinatory or synergistic effects among several modulatory SNPs for PD risk or AAO remain largely underexplored. Objectives The mechanistic target of rapamycin (mTOR) signaling pathway is functionally impaired in PD. Here we explored whether SNPs in the mTOR pathway, alone or by epistatic interaction with known susceptibility factors, can modulate PD risk and AAO. Methods Based on functional relevance, we selected a total of 64 SNPs mapping to a total of 57 genes from the mTOR pathway and genotyped a discovery series cohort encompassing 898 PD patients and 921 controls. As a replication series, we screened 4170 PD and 3014 controls available from the International Parkinson's Disease Genomics Consortium. Results In the discovery series cohort, we found a 4-loci interaction involving STK11 rs8111699, FCHSD1 rs456998, GSK3B rs1732170, and SNCA rs356219, which was associated with an increased risk of PD (odds ratio = 2.59, P < .001). In addition, we also found a 3-loci epistatic combination of RPTOR rs11868112 and RPS6KA2 rs6456121 with SNCA rs356219, which was associated (odds ratio = 2.89; P < .0001) with differential AAO. The latter was further validated (odds ratio = 1.56; P = 0.046-0.047) in the International Parkinson's Disease Genomics Consortium cohort. Conclusions These findings indicate that genetic variability in the mTOR pathway contributes to SNCA effects in a nonlinear epistatic manner to modulate differential AAO in PD, unraveling the contribution of this cascade in the pathogenesis of the disease. (c) 2019 International Parkinson and Movement Disorder Society

Published
2019

9. Moving beyond neurons : the role of cell type-specific gene regulation in Parkinson's disease heritability

Author

Reynolds, R. H., Botía, J., Nalls, M. A., Noyce, A. J., Nicolas, A., Cookson, M. R., Bandres-Ciga, S., Gibbs, J. R., Hernandez, D. G., Singleton, A. B., Reed, X., Leonard, H., Blauwendraat, Cornelis, Faghri, F., Bras, J., Guerreiro, Rita, Tucci, A., Kia, Demis A, Houlden, Henry, Plun-Favreau, H., Mok, K. Y., Wood, N. W., Lovering, R., R'Bibo, L., Rizig, M., Chelban, Viorica, Trabzuni, D., Tan, M., Morris, H. R., Middlehurst, B., Quinn, J., Billingsley, K., Holmans, Peter, Kinghorn, K. J., Lewis, P., Escott-Price, Valentina, Williams, N., Foltynie, T., Brice, Alexis, Danjou, F., Lesage, S., Corvol, Jean-Christophe, Martinez, M., Giri, A., Schulte, C., Brockmann, K., Simón-Sánchez, J., Heutink, Peter, Gasser, Thomas, Rizzu, P., Sharma, M., Shulman, J. M., Robak, L., Lubbe, S., Mencacci, N. E., Finkbeiner, S., Lungu, C., Scholz, S. W., Gan-Or, Z., Rouleau, G. A., Krohan, L., van Hilten, J. J., Marinus, J., Adarmes-Gómez, A.D, Bernal-Bernal, I., Bonilla-Toribio, Marta, Buiza-Rueda, Dolores, Carrillo, F., Carrión-Claro, M., Mir, P., Gómez-Garre, P., Jesús, S., Labrador-Espinosa, Miguel A, Macías-García, Daniel, Vargas-González, L., Méndez-del-Barrio, C., Periñán-Tocino, T., Tejera-Parrado, C., Diez-Fairen, Monica., Aguilar Barberà, Miquel, Alvarez, Ignacio, Boungiorno, M. T., Carcel, M., Pastor, Pau, Tartari, J. P., Alvarez, V., González, M. M., Blázquez Estrada, Marta, Garcia, C.., Suarez-Sanmartin, E., Barrero, F. J., Rezola, E. M., Yarza, J. A. B., Pagola, A. G., de Munain Arregui, A. L., Ruiz-Martínez, J., Cerdan, Debora, Duarte, J., Clarimón, Jordi, Dols Icardo, Oriol, Infante, J., Marín, J., Kulisevsky, Jaime, Pagonabarraga Mora, Javier, Gonzalez-Aramburu, Isabel, Rodriguez, A. S., Sierra, M., Duran, Raquel, Ruz, C., Vives, F., Escamilla-Sevilla, F., Mínguez, A., Cámara, Ana, Compta, Yaroslau, Ezquerra, M., Marti, M. J., Fernández, M., Muñoz García, José Esteban, Fernández Santiago, Rubén, Tolosa, E., Valldeoriola, F., García-Ruiz, P., Heredia, M. J. G., Errazquin, F. P., Hoenicka, J., Jimenez-Escrig, A., Martínez-Castrillo, J. C., Lopez-Sendon, J. L., Torres, I. M., Tabernero, C., Vela, Lydia, Zimprich, Alexander, Pihlstrom, L., Koks, S., Taba, P., Majamaa, K., Siitonen, A., Okubadejo, N. U., Ojo, O. O., Pitcher, T., Anderson, T., Bentley, S., Fowdar, J., Mellick, G., Dalrymple-Alford, J., Henders, Anjali K, Kassam, I., Montgomery, G., Sidorenko, J., Zhang, F., Xue, A., Vallerga, C. L., Wallace, Leanne, Wray, N. R., Yang, J., Visscher, P. M., Gratten, J., Silburn, P. A., Halliday, G., Hickie, Ian B, Kwok, J., Lewis, S., Kennedy, M., Pearson, J., Hardy, J., Gagliano Taliun, S. A., Ryten, Mina, and Universitat Autònoma de Barcelona

Abstract

Parkinson's disease (PD), with its characteristic loss of nigrostriatal dopaminergic neurons and deposition of α-synuclein in neurons, is often considered a neuronal disorder. However, in recent years substantial evidence has emerged to implicate glial cell types, such as astrocytes and microglia. In this study, we used stratified LD score regression and expression-weighted cell-type enrichment together with several brain-related and cell-type-specific genomic annotations to connect human genomic PD findings to specific brain cell types. We found that PD heritability attributable to common variation does not enrich in global and regional brain annotations or brain-related cell-type-specific annotations. Likewise, we found no enrichment of PD susceptibility genes in brain-related cell types. In contrast, we demonstrated a significant enrichment of PD heritability in a curated lysosomal gene set highly expressed in astrocytic, microglial, and oligodendrocyte subtypes, and in LoF-intolerant genes, which were found highly expressed in almost all tested cellular subtypes. Our results suggest that PD risk loci do not lie in specific cell types or individual brain regions, but rather in global cellular processes detectable across several cell types.

Published
2019

10. De Novo Mutations in PDE10A Cause Childhood-Onset Chorea with Bilateral Striatal Lesions

Author

Mencacci, NE, Kamsteeg, E-J, Nakashima, K, R'Bibo, L, Lynch, DS, Balint, B, Willemsen, MAAP, Adams, ME, Wiethoff, S, Suzuki, K, Davies, CH, Ng, J, Meyer, E, Veneziano, L, Giunti, P, Hughes, D, Raymond, FL, Carecchio, M, Zorzi, G, Nardocci, N, Barzaghi, C, Garavaglia, B, Salpietro, V, Hardy, J, Pittman, AM, Houlden, H, Kurian, MA, Kimura, H, Vissers, LELM, Wood, NW, and Bhatia, KP

Subjects
Male, Protein Conformation, Molecular Sequence Data, Sensory disorders Donders Center for Medical Neuroscience [Radboudumc 12], Mice, Young Adult, PDE10A chorea, Chorea, Report, Cyclic AMP, Genetics, Animals, Humans, Genetics(clinical), Amino Acid Sequence, Child, Cyclic GMP, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Phosphoric Diester Hydrolases, Middle Aged, Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3], Magnetic Resonance Imaging, Corpus Striatum, Pedigree, Mutation, Female, Sequence Alignment, Signal Transduction
Abstract

Contains fulltext : 167700.pdf (Publisher’s version ) (Open Access) Chorea is a hyperkinetic movement disorder resulting from dysfunction of striatal medium spiny neurons (MSNs), which form the main output projections from the basal ganglia. Here, we used whole-exome sequencing to unravel the underlying genetic cause in three unrelated individuals with a very similar and unique clinical presentation of childhood-onset chorea and characteristic brain MRI showing symmetrical bilateral striatal lesions. All individuals were identified to carry a de novo heterozygous mutation in PDE10A (c.898T>C [p.Phe300Leu] in two individuals and c.1000T>C [p.Phe334Leu] in one individual), encoding a phosphodiesterase highly and selectively present in MSNs. PDE10A contributes to the regulation of the intracellular levels of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). Both substitutions affect highly conserved amino acids located in the regulatory GAF-B domain, which, by binding to cAMP, stimulates the activity of the PDE10A catalytic domain. In silico modeling showed that the altered residues are located deep in the binding pocket, where they are likely to alter cAMP binding properties. In vitro functional studies showed that neither substitution affects the basal PDE10A activity, but they severely disrupt the stimulatory effect mediated by cAMP binding to the GAF-B domain. The identification of PDE10A mutations as a cause of chorea further motivates the study of cAMP signaling in MSNs and highlights the crucial role of striatal cAMP signaling in the regulation of basal ganglia circuitry. Pharmacological modulation of this pathway could offer promising etiologically targeted treatments for chorea and other hyperkinetic movement disorders.

Published
2016

11. ADCY5-related movement disorders: Frequency, disease course and phenotypic variability in a cohort of paediatric patients

Author

Carecchio, M. Mencacci, N.E. Iodice, A. Pons, R. Panteghini, C. Zorzi, G. Zibordi, F. Bonakis, A. Dinopoulos, A. Jankovic, J. Stefanis, L. Bhatia, K.P. Monti, V. R'Bibo, L. Veneziano, L. Garavaglia, B. Fusco, C. Wood, N. Stamelou, M. Nardocci, N.

Abstract

Introduction ADCY5 mutations have been recently identified as an important cause of early-onset hyperkinetic movement disorders. The phenotypic spectrum associated with mutations in this gene is expanding. However, the ADCY5 mutational frequency in cohorts of paediatric patients with hyperkinetic movement disorders has not been evaluated. Methods We performed a screening of the entire ADCY5 coding sequence in 44 unrelated subjects with genetically undiagnosed childhood-onset hyperkinetic movement disorders, featuring chorea alone or in combination with myoclonus and dystonia. All patients had normal CSF analysis and brain imaging and were regularly followed-up in tertiary centers for paediatric movement disorders. Results We identified five unrelated subjects with ADCY5 mutations (11% of the cohort). Three carried the p. R418W mutation, one the p. R418Q and one the p. R418G mutation. Mutations arose de novo in four cases, while one patient inherited the mutation from his similarly affected father. All patients had delayed motor and/or language milestones with or without axial hypotonia and showed generalized chorea and dystonia, with prominent myoclonic jerks in one case. Episodic exacerbations of the baseline movement disorder were observed in most cases, being the first disease manifestation in two patients. The disease course was variable, from stability to spontaneous improvement during adolescence. Conclusion Mutations in ADCY5 are responsible for a hyperkinetic movement disorder that can be preceded by episodic attacks before the movement disorder becomes persistent and is frequently misdiagnosed as dyskinetic cerebral palsy. A residual degree of neck hypotonia and a myopathy-like facial appearance are frequently observed in patients with ADCY5 mutations. © 2017 The Authors

Published
2017

12. De Novo Mutations in PDE1 0A Cause Childhood-Onset Chorea with Bilateral Striatal Lesions

Author

Mencacci N. E., Kamsteeg. E.J., Nakashima K., R'Bibo L., Lynch D. S., Balint B., Willemsen M. A. A. P., Adams M. E., Wiethoff S., Suzuki K., Davies C. H., Ng J., Meyer E., Veneziano L., Giunti P., Hughes D., Raymond F. L., Carecchio M., Zorzi G., Nardocci N., Barzaghi C., Garavaglia B., Salpietro V., Hardy J., Pittman A. M., Houlden H., Kurian M. A., Kimura H., Vissers L. E. L. M., Wood N. W., and Bhatia K. P.

Subjects
PDE10A, FAMILIAL DYSKINESIA, PHOSPHODIESTERASE 10A
Abstract

Chorea is a hyperkinetic movement disorder resulting from dysfunction of striatal medium spiny neurons (MSNs), which form the main output projections from the basal ganglia Here, we used whole-exome sequencing to unravel the underlying genetic cause in three unrelated individuals with a very similar and unique clinical presentation of childhood-onset chorea and characteristic brain MRI showing symmetrical bilateral striatal lesions. All individuals were identified to carry a de novo heterozygous mutation in PDE10A (c.898T>C [p.Phe300Leu] in two individuals and c.1000T>C [p.Phe334Leu] in one individual), encoding a phosphodiesterase highly and selectively present in MSNs. PDE10A contributes to the regulation of the intracellular levels of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). Both substitutions affect highly conserved amino acids located in the regulatory GAF-B domain, which, by binding to cAMP, stimulates the activity of the PDE10A catalytic domain. In silico modeling showed that the altered residues are located deep in the binding pocket, where they are likely to alter cAMP binding properties. In vitro functional studies showed that neither substitution affects the basal PDE10A activity, but they severely disrupt the stimulatory effect mediated by cAMP binding to the GAF-B domain. The identification of PDE10A mutations as a cause of chorea further motivates the study of cAMP signaling in MSNs and highlights the crucial role of striatal cAMP signaling in the regulation of basal ganglia circuitry. Pharmacological modulation of this pathway could offer promising etiologically targeted treatments for chorea and other hyperkinetic movement disorders.

Published
2016

13. NeuroChip, an updated version of the NeuroX genotyping platform to rapidly screen for variants associated with neurological diseases

Author

Blauwendraat, C., Faghri, F., Pihlstrom, L., Geiger, J. T., Elbaz, A., Lesage, S., Corvol, J. -C., May, P., Nicolas, A., Abramzon, Y., Murphy, N. A., Gibbs, J. R., Ryten, M., Ferrari, R., Bras, J., Guerreiro, R., Williams, J., Sims, R., Lubbe, S., Hernandez, D. G., Mok, K. Y., Robak, L., Campbell, R. H., Rogaeva, E., Traynor, B. J., Chia, R., Chung, S. J., Hardy, J. A., Brice, A., Wood, N. W., Houlden, H., Shulman, J. M., Morris, H. R., Gasser, T., Kruger, R., Heutink, P., Sharma, M., Simon-Sanchez, J., Nalls, M. A., Singleton, A. B., Scholz, S. W., Noyce, A. J., Giri, A., Oehmig, A., Tucci, A., Schulte, C., Cookson, M. R., Kia, D., Danjou, F., Charlesworth, G., Plun-Favreau, H., Holmans, P., Jansen, I., Hardy, J., Bras, J. M., Quinn, J., Botia, J. A., Billingsley, K., R'Bibo, L., Lungu, C., Martinez, M., Escott-Price, V., Mencacci, N. E., Topley, Lewis, Denny, P., Rizzu, P., Taba, P., Lovering, R., Ogalla, R. D., Foulger, R., Finkbeiner, S., Sveinbjornsdottir, S., Scholz, S., Koks, S., Foltynie, T., Price, T. R., Sheerin, U. -M., Williams, N., Reed, X., Wang, L., Brockmann, K., Oertel, W., Klein, C., Mohamed, F., Malard, L., Corti, O., Drouet, V., Goldwurm, S., Tesei, S., Canesi, M., Valente, E. M., Petrucci, S., Ginevrino, M., Toft, M., Aasly, J., Henriksen, S. P., Saetehaug, C., Orr-Urtreger, A., Giladi, N., Ferreira, J., Guedes, L. C., Bouca-Machado, R., Coelho, M., Rosa, M. M., Tolosa, E., Fernandez-Santiago, R., Ezquerra, M., Marti, M. J., Glaab, E., Balling, R., and Chung, S. -J.

Subjects
0301 basic medicine, Aging, methods [Genome-Wide Association Study], 0302 clinical medicine, Corticobasal degeneration, neurodegenerative diseases, humans, risk, high-throughput screening assays, education.field_of_study, General Neuroscience, neurodegeneration, genetics [Genetic Variation], 3. Good health, Neurochip, alleles, methods [Genotyping Techniques], Frontotemporal dementia, Risk, Population, methods [High-Throughput Screening Assays], Computational biology, Genetic screening, genotyping, NeuroChip, NeuroX, apolipoproteins E, genetic variation, genome-wide association study, genotyping techniques, Article, Progressive supranuclear palsy, 03 medical and health sciences, Apolipoproteins E, medicine, Humans, Dementia, ddc:610, education, Genotyping, Alleles, business.industry, medicine.disease, 030104 developmental biology, genetics [Neurodegenerative Diseases], genetics [Apolipoproteins E], Neurology (clinical), Geriatrics and Gerontology, business, Neuroscience, 030217 neurology & neurosurgery, Imputation (genetics), Developmental Biology
Abstract

Genetics has proven to be a powerful approach in neurodegenerative diseases research, resulting in the identification of numerous causal and risk variants. Previously, we introduced the NeuroX Illumina genotyping array, a fast and efficient genotyping platform designed for the investigation of genetic variation in neurodegenerative diseases. Here, we present its updated version, named NeuroChip. The NeuroChip is a low-cost, custom-designed array containing a tagging variant backbone of about 306,670 variants complemented with a manually curated custom content comprised of 179,467 variants implicated in diverse neurological diseases, including Alzheimer's disease, Parkinson's disease, Lewy body dementia, amyotrophic lateral sclerosis, frontotemporal dementia, progressive supranuclear palsy, corticobasal degeneration, and multiple system atrophy. The tagging backbone was chosen because of the low cost and good genome-wide resolution; the custom content can be combined with other backbones, like population or drug development arrays. Using the NeuroChip, we can accurately identify rare variants and impute over 5.3 million common SNPs from the latest release of the Haplotype Reference Consortium. In summary, we describe the design and usage of the NeuroChip array and show its capability for detecting rare pathogenic variants in numerous neurodegenerative diseases. The NeuroChip has a more comprehensive and improved content, which makes it a reliable, high-throughput, cost-effective screening tool for genetic research and molecular diagnostics in neurodegenerative diseases.

Published
2017

14. Aberrant axon initial segment plasticity and intrinsic excitability of ALS hiPSC motor neurons.

Author

Harley P, Kerins C, Gatt A, Neves G, Riccio F, Machado CB, Cheesbrough A, R'Bibo L, Burrone J, and Lieberam I

Subjects
Humans, Motor Neurons metabolism, Action Potentials physiology, Axon Initial Segment metabolism, Amyotrophic Lateral Sclerosis metabolism, Induced Pluripotent Stem Cells metabolism
Abstract

Dysregulated neuronal excitability is a hallmark of amyotrophic lateral sclerosis (ALS). We sought to investigate how functional changes to the axon initial segment (AIS), the site of action potential generation, could impact neuronal excitability in ALS human induced pluripotent stem cell (hiPSC) motor neurons. We find that early TDP-43 and C9orf72 hiPSC motor neurons show an increase in the length of the AIS and impaired activity-dependent AIS plasticity that is linked to abnormal homeostatic regulation of neuronal activity and intrinsic hyperexcitability. In turn, these hyperactive neurons drive increased spontaneous myofiber contractions of in vitro hiPSC motor units. In contrast, late hiPSC and postmortem ALS motor neurons show AIS shortening, and hiPSC motor neurons progress to hypoexcitability. At a molecular level, aberrant expression of the AIS master scaffolding protein ankyrin-G and AIS-specific voltage-gated sodium channels mirror these dynamic changes in AIS function and excitability. Our results point toward the AIS as an important site of dysfunction in ALS motor neurons., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)

Published
2023
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15. APOE4 impairs myelination via cholesterol dysregulation in oligodendrocytes.

Author

Blanchard JW, Akay LA, Davila-Velderrain J, von Maydell D, Mathys H, Davidson SM, Effenberger A, Chen CY, Maner-Smith K, Hajjar I, Ortlund EA, Bula M, Agbas E, Ng A, Jiang X, Kahn M, Blanco-Duque C, Lavoie N, Liu L, Reyes R, Lin YT, Ko T, R'Bibo L, Ralvenius WT, Bennett DA, Cam HP, Kellis M, and Tsai LH

Subjects
Animals, Humans, Mice, Alzheimer Disease genetics, Alzheimer Disease metabolism, Alzheimer Disease pathology, Autopsy, Induced Pluripotent Stem Cells, Neurons metabolism, Neurons pathology, Heterozygote, Biological Transport, Homeostasis, Single-Cell Analysis, Memory, Aging genetics, Gene Expression Profiling, Myelin Sheath metabolism, Myelin Sheath pathology, Apolipoprotein E4 genetics, Apolipoprotein E4 metabolism, Brain metabolism, Brain pathology, Cholesterol metabolism, Oligodendroglia metabolism, Oligodendroglia pathology, Nerve Fibers, Myelinated metabolism, Nerve Fibers, Myelinated pathology
Abstract

APOE4 is the strongest genetic risk factor for Alzheimer's disease 1-3 . However, the effects of APOE4 on the human brain are not fully understood, limiting opportunities to develop targeted therapeutics for individuals carrying APOE4 and other risk factors for Alzheimer's disease 4-8 . Here, to gain more comprehensive insights into the impact of APOE4 on the human brain, we performed single-cell transcriptomics profiling of post-mortem human brains from APOE4 carriers compared with non-carriers. This revealed that APOE4 is associated with widespread gene expression changes across all cell types of the human brain. Consistent with the biological function of APOE 2-6 , APOE4 significantly altered signalling pathways associated with cholesterol homeostasis and transport. Confirming these findings with histological and lipidomic analysis of the post-mortem human brain, induced pluripotent stem-cell-derived cells and targeted-replacement mice, we show that cholesterol is aberrantly deposited in oligodendrocytes-myelinating cells that are responsible for insulating and promoting the electrical activity of neurons. We show that altered cholesterol localization in the APOE4 brain coincides with reduced myelination. Pharmacologically facilitating cholesterol transport increases axonal myelination and improves learning and memory in APOE4 mice. We provide a single-cell atlas describing the transcriptional effects of APOE4 on the aging human brain and establish a functional link between APOE4, cholesterol, myelination and memory, offering therapeutic opportunities for Alzheimer's disease., (© 2022. The Author(s), under exclusive licence to Springer Nature Limited.)

Published
2022
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16. Biobased Elastomer Nanofibers Guide Light-Controlled Human-iPSC-Derived Skeletal Myofibers.

Author

Cheesbrough A, Sciscione F, Riccio F, Harley P, R'Bibo L, Ziakas G, Darbyshire A, Lieberam I, and Song W

Subjects
Cell Differentiation, Elastomers, Humans, Muscle Fibers, Skeletal, Muscle, Skeletal, Tissue Engineering methods, Tissue Scaffolds, Induced Pluripotent Stem Cells, Nanofibers
Abstract

Generating skeletal muscle tissue that mimics the cellular alignment, maturation, and function of native skeletal muscle is an ongoing challenge in disease modeling and regenerative therapies. Skeletal muscle cultures require extracellular guidance and mechanical support to stabilize contractile myofibers. Existing microfabrication-based solutions are limited by complex fabrication steps, low throughput, and challenges in measuring dynamic contractile function. Here, the synthesis and characterization of a new biobased nanohybrid elastomer, which is electrospun into aligned nanofiber sheets to mimic the skeletal muscle extracellular matrix, is presented. The polymer exhibits remarkable hyperelasticity well-matched to that of native skeletal muscle (≈11-50 kPa), with ultimate strain ≈1000%, and elastic modulus ≈25 kPa. Uniaxially aligned nanofibers guide myoblast alignment, enhance sarcomere formation, and promote a ≈32% increase in myotube fusion and ≈50% increase in myofiber maturation. The elastomer nanofibers stabilize optogenetically controlled human induced pluripotent stem cell derived skeletal myofibers. When activated by blue light, the myofiber-nanofiber hybrid constructs maintain a significantly higher (>200%) contraction velocity and specific force (>280%) compared to conventional culture methods. The engineered myofibers exhibit a power density of ≈35 W m -3 . This system is a promising new skeletal muscle tissue model for applications in muscular disease modeling, drug discovery, and muscle regeneration., (© 2022 The Authors. Advanced Materials published by Wiley-VCH GmbH.)

Published
2022
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17. Fibrillation and molecular characteristics are coherent with clinical and pathological features of 4-repeat tauopathy caused by MAPT variant G273R.

Author

Sandberg A, Ling H, Gearing M, Dombroski B, Cantwell L, R'Bibo L, Levey A, Schellenberg GD, Hardy J, Wood N, Fernius J, Nyström S, Svensson S, Thor S, Hammarström P, Revesz T, and Mok KY

Subjects
Animals, Basal Ganglia Diseases metabolism, Brain metabolism, Drosophila, Mutation genetics, Neuroglia metabolism, Brain pathology, Neurons metabolism, Supranuclear Palsy, Progressive metabolism, Tauopathies pathology
Abstract

Microtubule Associated Protein Tau (MAPT) forms proteopathic aggregates in several diseases. The G273R tau mutation, located in the first repeat region, was found by exome sequencing in a patient who presented with dementia and parkinsonism. We herein return to pathological examination which demonstrated tau immunoreactivity in neurons and glia consistent of mixed progressive supranuclear palsy (PSP) and corticobasal degeneration (CBD) features. To rationalize the pathological findings, we used molecular biophysics to characterize the mutation in more detail in vitro and in Drosophila. The G273R mutation increases the aggregation propensity of 4-repeat (4R) tau and alters the tau binding affinity towards microtubules (MTs) and F-actin. Tau aggregates in PSP and CBD are predominantly 4R tau. Our data suggest that the G273R mutation induces a shift in pool of 4R tau by lower F-actin affinity, alters the conformation of MT bound 4R tau, while increasing chaperoning of 3R tau by binding stronger to F-actin. The mutation augmented fibrillation of 4R tau initiation in vitro and in glial cells in Drosophila and showed preferential seeding of 4R tau in vitro suggestively causing a late onset 4R tauopathy reminiscent of PSP and CBD., (Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.)

Published
2020
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18. Fulminant corticobasal degeneration: a distinct variant with predominant neuronal tau aggregates.

Author

Ling H, Gelpi E, Davey K, Jaunmuktane Z, Mok KY, Jabbari E, Simone R, R'Bibo L, Brandner S, Ellis MJ, Attems J, Mann D, Halliday GM, Al-Sarraj S, Hedreen J, Ironside JW, Kovacs GG, Kovari E, Love S, Vonsattel JPG, Allinson KSJ, Hansen D, Bradshaw T, Setó-Salvia N, Wray S, de Silva R, Morris HR, Warner TT, Hardy J, Holton JL, and Revesz T

Subjects
Aged, Aged, 80 and over, Basal Ganglia Diseases metabolism, Cerebral Cortex pathology, Disease Progression, Female, Humans, Male, Middle Aged, Neurodegenerative Diseases metabolism, Basal Ganglia Diseases pathology, Neurodegenerative Diseases pathology, tau Proteins metabolism
Abstract

Corticobasal degeneration typically progresses gradually over 5-7 years from onset till death. Fulminant corticobasal degeneration cases with a rapidly progressive course were rarely reported (RP-CBD). This study aimed to investigate their neuropathological characteristics. Of the 124 autopsy-confirmed corticobasal degeneration cases collected from 14 centres, we identified 6 RP-CBD cases (4.8%) who died of advanced disease within 3 years of onset. These RP-CBD cases had different clinical phenotypes including rapid global cognitive decline (N = 2), corticobasal syndrome (N = 2) and Richardson's syndrome (N = 2). We also studied four corticobasal degeneration cases with an average disease duration of 3 years or less, who died of another unrelated illness (Intermediate-CBD). Finally, we selected 12 age-matched corticobasal degeneration cases out of a cohort of 110, who had a typical gradually progressive course and reached advanced clinical stage (End-stage-CBD). Quantitative analysis showed high overall tau burden (p = 0.2) and severe nigral cell loss (p = 0.47) in both the RP-CBD and End-stage-CBD groups consistent with advanced pathological changes, while the Intermediate-CBD group (mean disease duration = 3 years) had milder changes than End-stage-CBD (p < 0.05). These findings indicated that RP-CBD cases had already developed advanced pathological changes as those observed in End-stage-CBD cases (mean disease duration = 6.7 years), but within a significantly shorter duration (2.5 years; p < 0.001). Subgroup analysis was performed to investigate the cellular patterns of tau aggregates in the anterior frontal cortex and caudate by comparing neuronal-to-astrocytic plaque ratios between six RP-CBD cases, four Intermediate-CBD and 12 age-matched End-stage-CBD. Neuronal-to-astrocytic plaque ratios of Intermediate-CBD and End-stage-CBD, but not RP-CBD, positively correlated with disease duration in both the anterior frontal cortex and caudate (p = 0.02). In contrast to the predominance of astrocytic plaques we previously reported in preclinical asymptomatic corticobasal degeneration cases, neuronal tau aggregates predominated in RP-CBD exceeding those in Intermediate-CBD (anterior frontal cortex: p < 0.001, caudate: p = 0.001) and End-stage-CBD (anterior frontal cortex: p = 0.03, caudate: p = 0.01) as demonstrated by its higher neuronal-to-astrocytic plaque ratios in both anterior frontal cortex and caudate. We did not identify any difference in age at onset, any pathogenic tau mutation or concomitant pathologies that could have contributed to the rapid progression of these RP-CBD cases. Mild TDP-43 pathology was observed in three RP-CBD cases. All RP-CBD cases were men. The MAPT H2 haplotype, known to be protective, was identified in one RP-CBD case (17%) and 8 of the matched End-stage-CBD cases (67%). We conclude that RP-CBD is a distinct aggressive variant of corticobasal degeneration with characteristic neuropathological substrates resulting in a fulminant disease process as evident both clinically and pathologically. Biological factors such as genetic modifiers likely play a pivotal role in the RP-CBD variant and should be the subject of future research.

Published
2020
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19. ADCY5-related movement disorders: Frequency, disease course and phenotypic variability in a cohort of paediatric patients.

Author

Carecchio M, Mencacci NE, Iodice A, Pons R, Panteghini C, Zorzi G, Zibordi F, Bonakis A, Dinopoulos A, Jankovic J, Stefanis L, Bhatia KP, Monti V, R'Bibo L, Veneziano L, Garavaglia B, Fusco C, Wood N, Stamelou M, and Nardocci N

Subjects
Adolescent, Adult, Child, Preschool, Cohort Studies, DNA Mutational Analysis, Female, Humans, Male, Middle Aged, Adenylyl Cyclases genetics, Developmental Disabilities etiology, Movement Disorders complications, Movement Disorders diagnosis, Movement Disorders epidemiology, Movement Disorders genetics, Mutation genetics
Abstract

Introduction: ADCY5 mutations have been recently identified as an important cause of early-onset hyperkinetic movement disorders. The phenotypic spectrum associated with mutations in this gene is expanding. However, the ADCY5 mutational frequency in cohorts of paediatric patients with hyperkinetic movement disorders has not been evaluated., Methods: We performed a screening of the entire ADCY5 coding sequence in 44 unrelated subjects with genetically undiagnosed childhood-onset hyperkinetic movement disorders, featuring chorea alone or in combination with myoclonus and dystonia. All patients had normal CSF analysis and brain imaging and were regularly followed-up in tertiary centers for paediatric movement disorders., Results: We identified five unrelated subjects with ADCY5 mutations (11% of the cohort). Three carried the p. R418W mutation, one the p. R418Q and one the p. R418G mutation. Mutations arose de novo in four cases, while one patient inherited the mutation from his similarly affected father. All patients had delayed motor and/or language milestones with or without axial hypotonia and showed generalized chorea and dystonia, with prominent myoclonic jerks in one case. Episodic exacerbations of the baseline movement disorder were observed in most cases, being the first disease manifestation in two patients. The disease course was variable, from stability to spontaneous improvement during adolescence., Conclusion: Mutations in ADCY5 are responsible for a hyperkinetic movement disorder that can be preceded by episodic attacks before the movement disorder becomes persistent and is frequently misdiagnosed as dyskinetic cerebral palsy. A residual degree of neck hypotonia and a myopathy-like facial appearance are frequently observed in patients with ADCY5 mutations., (Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Published
2017
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20. PREDICT-PD: An online approach to prospectively identify risk indicators of Parkinson's disease.

Author

Noyce AJ, R'Bibo L, Peress L, Bestwick JP, Adams-Carr KL, Mencacci NE, Hawkes CH, Masters JM, Wood N, Hardy J, Giovannoni G, Lees AJ, and Schrag A

Subjects
Aftercare, Aged, Algorithms, Female, Glucosylceramidase genetics, Humans, Internet, Leucine-Rich Repeat Serine-Threonine Protein Kinase-2 genetics, Male, Middle Aged, Parkinson Disease genetics, Risk Factors, Saliva, Genetic Testing methods, Parkinson Disease diagnosis, Prodromal Symptoms, Risk Assessment methods
Abstract

Background: A number of early features can precede the diagnosis of Parkinson's disease (PD)., Objective: To test an online, evidence-based algorithm to identify risk indicators of PD in the UK population., Methods: Participants aged 60 to 80 years without PD completed an online survey and keyboard-tapping task annually over 3 years, and underwent smell tests and genotyping for glucocerebrosidase (GBA) and leucine-rich repeat kinase 2 (LRRK2) mutations. Risk scores were calculated based on the results of a systematic review of risk factors and early features of PD, and individuals were grouped into higher (above 15th centile), medium, and lower risk groups (below 85th centile). Previously defined indicators of increased risk of PD ("intermediate markers"), including smell loss, rapid eye movement-sleep behavior disorder, and finger-tapping speed, and incident PD were used as outcomes. The correlation of risk scores with intermediate markers and movement of individuals between risk groups was assessed each year and prospectively. Exploratory Cox regression analyses with incident PD as the dependent variable were performed., Results: A total of 1323 participants were recruited at baseline and >79% completed assessments each year. Annual risk scores were correlated with intermediate markers of PD each year and baseline scores were correlated with intermediate markers during follow-up (all P values < 0.001). Incident PD diagnoses during follow-up were significantly associated with baseline risk score (hazard ratio = 4.39, P = .045). GBA variants or G2019S LRRK2 mutations were found in 47 participants, and the predictive power for incident PD was improved by the addition of genetic variants to risk scores., Conclusions: The online PREDICT-PD algorithm is a unique and simple method to identify indicators of PD risk. © 2017 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society., (© 2016 International Parkinson and Movement Disorder Society.)

Published
2017
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21. The CACNA1B R1389H variant is not associated with myoclonus-dystonia in a large European multicentric cohort.

Author

Mencacci NE, R'bibo L, Bandres-Ciga S, Carecchio M, Zorzi G, Nardocci N, Garavaglia B, Batla A, Bhatia KP, Pittman AM, Hardy J, Weissbach A, Klein C, Gasser T, Lohmann E, and Wood NW

Subjects
Alleles, Cohort Studies, Europe epidemiology, Exome, Female, Gene Frequency, Genetic Association Studies, Genotype, High-Throughput Nucleotide Sequencing, Humans, Male, Amino Acid Substitution, Calcium Channels, N-Type genetics, Codon, Dystonic Disorders epidemiology, Dystonic Disorders genetics, Mutation
Abstract

Myoclonus-dystonia (M-D) is a very rare movement disorder, caused in ∼30-50% of cases by mutations in SGCE. The CACNA1B variant c.4166G>A; (p.R1389H) was recently reported as the likely causative mutation in a single 3-generation Dutch pedigree with five subjects affected by a unique dominant M-D syndrome and cardiac arrhythmias. In an attempt to replicate this finding, we assessed by direct sequencing the frequency of CACNA1B c.4166G>A; (p.R1389H) in a cohort of 520 M-D cases, in which SGCE mutations had been previously excluded. A total of 146 cases (28%) had a positive family history of M-D. The frequency of the variant was also assessed in 489 neurologically healthy controls and in publicly available data sets of genetic variation (1000 Genomes, Exome Variant Server and Exome Aggregation Consortium). The variant was detected in a single sporadic case with M-D, but in none of the 146 probands with familial M-D. Overall, the variant was present at comparable frequencies in M-D cases (1 out of 520; 0.19%) and healthy controls (1 out of 489; 0.2%). A similar frequency of the variant was also reported in all publicly available databases. These results do not support a causal association between the CACNA1B c.4166G>A; (p.R1389H) variant and M-D., (© The Author 2015. Published by Oxford University Press.)

Published
2015
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