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5. Multi-ancestry genetic study of type 2 diabetes highlights the power of diverse populations for discovery and translation

Author

Mahajan, Anubha, Spracklen, Cassandra N, Zhang, Weihua, Ng, Maggie CY, Petty, Lauren E, Kitajima, Hidetoshi, Yu, Grace Z, Rüeger, Sina, Speidel, Leo, Kim, Young Jin, Horikoshi, Momoko, Mercader, Josep M, Taliun, Daniel, Moon, Sanghoon, Kwak, Soo-Heon, Robertson, Neil R, Rayner, Nigel W, Loh, Marie, Kim, Bong-Jo, Chiou, Joshua, Miguel-Escalada, Irene, Della Briotta Parolo, Pietro, Lin, Kuang, Bragg, Fiona, Preuss, Michael H, Takeuchi, Fumihiko, Nano, Jana, Guo, Xiuqing, Lamri, Amel, Nakatochi, Masahiro, Scott, Robert A, Lee, Jung-Jin, Huerta-Chagoya, Alicia, Graff, Mariaelisa, Chai, Jin-Fang, Parra, Esteban J, Yao, Jie, Bielak, Lawrence F, Tabara, Yasuharu, Hai, Yang, Steinthorsdottir, Valgerdur, Cook, James P, Kals, Mart, Grarup, Niels, Schmidt, Ellen M, Pan, Ian, Sofer, Tamar, Wuttke, Matthias, Sarnowski, Chloe, Gieger, Christian, Nousome, Darryl, Trompet, Stella, Long, Jirong, Sun, Meng, Tong, Lin, Chen, Wei-Min, Ahmad, Meraj, Noordam, Raymond, Lim, Victor JY, Tam, Claudia HT, Joo, Yoonjung Yoonie, Chen, Chien-Hsiun, Raffield, Laura M, Lecoeur, Cécile, Prins, Bram Peter, Nicolas, Aude, Yanek, Lisa R, Chen, Guanjie, Jensen, Richard A, Tajuddin, Salman, Kabagambe, Edmond K, An, Ping, Xiang, Anny H, Choi, Hyeok Sun, Cade, Brian E, Tan, Jingyi, Flanagan, Jack, Abaitua, Fernando, Adair, Linda S, Adeyemo, Adebowale, Aguilar-Salinas, Carlos A, Akiyama, Masato, Anand, Sonia S, Bertoni, Alain, Bian, Zheng, Bork-Jensen, Jette, Brandslund, Ivan, Brody, Jennifer A, Brummett, Chad M, Buchanan, Thomas A, Canouil, Mickaël, Chan, Juliana CN, Chang, Li-Ching, Chee, Miao-Li, Chen, Ji, Chen, Shyh-Huei, Chen, Yuan-Tsong, Chen, Zhengming, Chuang, Lee-Ming, and Cushman, Mary

Subjects
Human Genome, Diabetes, Single Nucleotide, Biological Sciences, eMERGE Consortium, Medical and Health Sciences, FinnGen, Risk Factors, Diabetes Mellitus, Ethnicity, Genetics, Humans, Genetic Predisposition to Disease, Polymorphism, Type 2, Metabolic and endocrine, Genome-Wide Association Study, Developmental Biology
Abstract

We assembled an ancestrally diverse collection of genome-wide association studies (GWAS) of type 2 diabetes (T2D) in 180,834 affected individuals and 1,159,055 controls (48.9% non-European descent) through the Diabetes Meta-Analysis of Trans-Ethnic association studies (DIAMANTE) Consortium. Multi-ancestry GWAS meta-analysis identified 237 loci attaining stringent genome-wide significance (P 50% posterior probability. This improved fine-mapping enabled systematic assessment of candidate causal genes and molecular mechanisms through which T2D associations are mediated, laying the foundations for functional investigations. Multi-ancestry genetic risk scores enhanced transferability of T2D prediction across diverse populations. Our study provides a step toward more effective clinical translation of T2D GWAS to improve global health for all, irrespective of genetic background.

Published
2022

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

Author

Reynolds, Regina H, Botía, Juan, Gibbs, J Raphael, Duarte, Jacinto, Clarimón, Jordi, Dols-Icardo, Oriol, Infante, Jon, Marín, Juan, Kulisevsky, Jaime, Pagonabarraga, Javier, Gonzalez-Aramburu, Isabel, Rodriguez, Antonio Sanchez, Sierra, María, Hernandez, Dena G, Duran, Raquel, Ruz, Clara, Vives, Francisco, Escamilla-Sevilla, Francisco, Mínguez, Adolfo, Cámara, Ana, Compta, Yaroslau, Ezquerra, Mario, Marti, Maria Jose, Fernández, Manel, Singleton, Andrew B, Muñoz, Esteban, Fernández-Santiago, Rubén, Tolosa, Eduard, Valldeoriola, Francesc, García-Ruiz, Pedro, Heredia, Maria Jose Gomez, Errazquin, Francisco Perez, Hoenicka, Janet, Jimenez-Escrig, Adriano, Martínez-Castrillo, Juan Carlos, Reed, Xylena, Lopez-Sendon, Jose Luis, Torres, Irene Martínez, Tabernero, Cesar, Vela, Lydia, Zimprich, Alexander, Pihlstrom, Lasse, Koks, Sulev, Taba, Pille, Majamaa, Kari, Siitonen, Ari, Leonard, Hampton, Okubadejo, Njideka U, Ojo, Oluwadamilola O, Pitcher, Toni, Anderson, Tim, Bentley, Steven, Fowdar, Javed, Mellick, George, Dalrymple-Alford, John, Henders, Anjali K, Kassam, Irfahan, Blauwendraat, Cornelis, Montgomery, Grant, Sidorenko, Julia, Zhang, Futao, Xue, Angli, Vallerga, Costanza L, Wallace, Leanne, Wray, Naomi R, Yang, Jian, Visscher, Peter M, Gratten, Jacob, Faghri, Faraz, Silburn, Peter A, Halliday, Glenda, Hickie, Ian, Kwok, John, Lewis, Simon, Kennedy, Martin, Pearson, John, Bras, Jose, Guerreiro, Rita, Tucci, Arianna, Nalls, Mike A, Kia, Demis A, Houlden, Henry, Plun-Favreau, Helene, Mok, Kin Y, Wood, Nicholas W, Lovering, Ruth, R'Bibo, Lea, Rizig, Mie, Chelban, Viorica, Trabzuni, Daniah, Hardy, John, Tan, Manuela, Morris, Huw R, Middlehurst, Ben, Quinn, John, Billingsley, Kimberley, Holmans, Peter, Kinghorn, Kerri J, Lewis, Patrick, Escott-Price, Valentina, Williams, Nigel, Gagliano Taliun, Sarah A, Foltynie, Thomas, Brice, Alexis, Danjou, Fabrice, Lesage, Suzanne, Corvol, Jean-Christophe, Martinez, Maria, Giri, Anamika, Schulte, Claudia, Brockmann, Kathrin, Simon Sanchez, Javier, Ryten, Mina, Heutink, Peter, Gasser, Thomas, Rizzu, Patrizia, Sharma, Manu, Shulman, Joshua M, Robak, Laurie, Lubbe, Steven, Mencacci, Niccolo E, Finkbeiner, Steven, Lungu, Codrin, Noyce, Alastair J, Scholz, Sonja W, Gan-Or, Ziv, Rouleau, Guy A, Krohan, Lynne, van Hilten, Jacobus J, Marinus, Johan, Adarmes-Gómez, Astrid D, Bernal-Bernal, Inmaculada, Bonilla-Toribio, Marta, Buiza-Rueda, Dolores, Nicolas, Aude, Carrillo, Fátima, Carrión-Claro, Mario, Mir, Pablo, Gómez-Garre, Pilar, Jesús, Silvia, Labrador-Espinosa, Miguel A, Macias, Daniel, Vargas-González, Laura, Méndez-Del-Barrio, Carlota, Periñán-Tocino, Teresa, Cookson, Mark R, Tejera-Parrado, Cristina, Diez-Fairen, Monica, Aguilar, Miquel, Alvarez, Ignacio, Boungiorno, María Teresa, Carcel, Maria, Pastor, Pau, Tartari, Juan Pablo, Alvarez, Victoria, González, Manuel Menéndez, Bandres-Ciga, Sara, Blazquez, Marta, Garcia, Ciara, Suarez-Sanmartin, Esther, Barrero, Francisco Javier, Rezola, Elisabet Mondragon, Yarza, Jesús Alberto Bergareche, Pagola, Ana Gorostidi, de Munain Arregui, Adolfo López, Ruiz-Martínez, Javier, and Cerdan, Debora

Subjects
Regulation of gene expression, 0303 health sciences, Cell type, Parkinson's disease, Microglia, Dopaminergic, Genomics, Disease, Biology, medicine.disease, Article, 03 medical and health sciences, 0302 clinical medicine, medicine.anatomical_structure, medicine, ddc:610, Neuroscience, Gene, 030217 neurology & neurosurgery, 030304 developmental biology
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
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27. The Genetic Architecture of Parkinson Disease in Spain: Characterizing Population-Specific Risk, Differential Haplotype Structures, and Providing Etiologic Insight

Author

Bandres-Ciga, Sara, Ahmed, Sarah, Gómez-Garre, Pilar, Kia, Demis A, Tan, Manuela, Houlden, Henry, Morris, Huw R, Plun-Favreau, Helene, Holmans, Peter, Hardy, John, Trabzuni, Daniah, Bras, Jose, PhD, John Quinn, Jesús, Silvia, Mok, Kin Y, Kinghorn, Kerri J, Billingsley, Kimberley, Wood, Nicholas W, Lewis, Patrick, Schreglmann, Sebastian, Guerreiro, Rita, Lovering, Ruth, R'Bibo, Lea, Manzoni, Claudia, Labrador-Espinosa, Miguel A, Rizig, Mie, Ryten, Mina, Guelfi, Sebastian, Escott-Price, Valentina, Chelban, Viorica, Foltynie, Thomas, Williams, Nigel, Morrison, Karen E, Brice, Alexis, Danjou, Fabrice, Macias, Daniel, Lesage, Suzanne, Corvol, Jean-Christophe, Martinez, Maria, Schulte, Claudia, Brockmann, Kathrin, Simón-Sánchez, Javier, Heutink, Peter, Rizzu, Patrizia, Sharma, Manu, Gasser, Thomas, Méndez-Del-Barrio, Carlota, Nicolas, Aude, Cookson, Mark R, Blauwendraat, Cornelis, Craig, David W, Faghri, Faraz, Gibbs, J Raphael, Hernandez, Dena G, Keuren-Jensen, Kendall Van, Shulman, Joshua M, Periñán-Tocino, Teresa, Iwaki, Hirotaka, Leonard, Hampton L, Nalls, Mike A, Robak, Laurie, Lubbe, Steven, Finkbeiner, Steven, Mencacci, Niccolo E, Lungu, Codrin, Singleton, Andrew B, Scholz, Sonja W, Tejera-Parrado, Cristina, Reed, Xylena, Alcalay, Roy N, Gan-Or, Ziv, Rouleau, Guy A, Krohn, Lynne, van Hilten, Jacobus J, Marinus, Johan, Adarmes-Gómez, Astrid D, Aguilar, Miquel, Alvarez, Ignacio, Vargas-González, Laura, Alvarez, Victoria, Barrero, Francisco Javier, Yarza, Jesús Alberto Bergareche, Bernal-Bernal, Inmaculada, Blazquez, Marta, Bonilla-Toribio, Marta, Botía, Juan A, Boungiorno, María Teresa, Buiza-Rueda, Dolores, Cámara, Ana, Diez-Fairen, Monica, Carrillo, Fátima, Carrión-Claro, Mario, Cerdan, Debora, Clarimón, Jordi, Compta, Yaroslau, de la Casa, Beatríz, Dols-Icardo, Oriol, Duarte, Jacinto, Duran, Raquel, Escamilla-Sevilla, Francisco, Ezquerra, Mario, Feliz, Cici, Fernández, Manel, Fernández-Santiago, Rubé, Garcia, Ciara, García-Ruiz, Pedro, Heredia, Maria Jose Gomez, Gonzalez-Aramburu, Isabel, Sabir, Marya S, Tartari, Juan Pablo, Pagola, Ana Gorostidi, Hoenicka, Janet, Infante, Jon, Jimenez-Escrig, Adriano, Kulisevsky, Jaime, Lopez-Sendon, Jose Luis, Arregui, Adolfo López de Munain, Buongiorno, Mariateresa, Torres, Irene Martínez, Marín, Juan, Marti, Maria Jose, Martínez-Castrillo, Juan Carlos, González, Manuel Menéndez, Mata, Marina, Mínguez, Adolfo, Mir, Pablo, Rezola, Elisabet Mondragon, Pagonabarraga, Javier, Pascual-Sedano, Berta, Pastor, Pau, Errazquin, Francisco Perez, Ruiz-Martínez, Javier, Ruz, Clara, Rodriguez, Antonio Sanchez, Sierra, María, Suarez-Sanmartin, Esther, Gorostidi, Ana, Tabernero, Cesar, Tolosa, Eduard, Valldeoriola, Francesc, Vela, Lydia, Vives, Francisco, Zimprich, Alexander, Pihlstrom, Lasse, Bergareche, Jesús Alberto, Toft, Mathias, Koks, Sulev, Taba, Pille, Hassin-Baer, Sharon, Dalgard, Clifton L, Adeleye, Adelani, Soltis, Anthony R, Alba, Camille, Viollet, Coralie, Bacikova, Dagmar, Mondragon, Elisabet, Hupalo, Daniel N, Sukumar, Gauthaman, Pollard, Harvey B, Wilkerson, Matthew D, Martinez, Elisa McGrath, Vinagre-Aragon, Ana, Croitoru, Ioana, Marín-Lahoz, Juan, Fernández-Santiago, Rubén, Muñoz, Esteban, Sanchez Rodriguez, Antonio, Menéndez-González, Manuel, Suarez-San Martin, Esther, Vela-Desojo, Lydia, Mínguez-Castellanos, Adolfo, Gomez Heredia, Maria Jose, Perez Errazquin, Francisco, Romero-Acebal, Manolo, Martínez Torres, Irene, Kim, Jonggeol Jeffrey, Center, American Genome, Brooks, Janet, Saez-Atienzar, Sara, Jorda, Rafael, Botia, Juan A, Bonet-Ponce, Luis, Clarke, Carl, Morris, Huw, Edsall, Connor, Hernandez, Dena, Simon Sanchez, Javier, Marti, Maria José, López de Munain, Adolfo, Singleton, Andrew, Consortium, International Parkinson Disease Genomics, Noyce, Alastair J, Kaiyrzhanov, Rauan, Middlehurst, Ben, National Institutes of Health (US), Department of Defense (US), Michael J. Fox Foundation for Parkinson's Research, Instituto de Salud Carlos III, Ministerio de Economía y Competitividad (España), European Commission, Junta de Andalucía, Sociedad Andaluza de Neurología, Jacques and Gloria Gossweiler Foundation, Fundación Alicia Koplowitz, Fundación Mutua Madrileña, and Universidad de Sevilla

Subjects
0301 basic medicine, Male, Multifactorial Inheritance, Parkinson's disease, age at onset, Machine Learning, 0302 clinical medicine, Cost of Illness, genetics [Parkinson Disease], Population specific, genetics [Genetic Predisposition to Disease], Age of Onset, genetics [Ubiquitin-Protein Ligases], Aged, 80 and over, Age at onset, Chromosome Mapping, Parkinson Disease, Middle Aged, Spanish population, humanities, Neurology, Christian ministry, Female, Adult, Genotype, Ubiquitin-Protein Ligases, Article, risk haplotype, 03 medical and health sciences, Risk score risk haplotype, Political science, polygenic risk score, Humans, Genetic Predisposition to Disease, ddc:610, Risk haplotype, Parkinson's disease, Spanish population, age at onset, polygenic risk score, risk haplotype, Aged, DNA Methylation, 030104 developmental biology, Haplotypes, Spain, Case-Control Studies, Polygenic risk score, Neurology (clinical), Polygenic, Humanities, 030217 neurology & neurosurgery, Genome-Wide Association Study
Abstract

Background: The Iberian Peninsula stands out as having variable levels of population admixture and isolation, making Spain an interesting setting for studying the genetic architecture of neurodegenerative diseases. Objectives: To perform the largest PD genome-wide association study restricted to a single country. Methods: We performed a GWAS for both risk of PD and age at onset in 7,849 Spanish individuals. Further analyses included population-specific risk haplotype assessments, polygenic risk scoring through machine learning, Mendelian randomization of expression, and methylation data to gain insight into disease-associated loci, heritability estimates, genetic correlations, and burden analyses. Results: We identified a novel population-specific genome-wide association study signal at PARK2 associated with age at onset, which was likely dependent on the c.155delA mutation. We replicated four genome-wide independent signals associated with PD risk, including SNCA, LRRK2, KANSL1/MAPT, and HLA-DQB1. A significant trend for smaller risk haplotypes at known loci was found compared to similar studies of non-Spanish origin. Seventeen PD-related genes showed functional consequence by two-sample Mendelian randomization in expression and methylation data sets. Long runs of homozygosity at 28 known genes/loci were found to be enriched in cases versus controls. Conclusions: Our data demonstrate the utility of the Spanish risk haplotype substructure for future fine-mapping efforts, showing how leveraging unique and diverse population histories can benefit genetic studies of complex diseases. The present study points to PARK2 as a major hallmark of PD etiology in Spain., This research was supported, in part, by the Intramural Research Program of the National Institutes of Health (National Institute on Aging, National Institute of Neurological Disorders and Stroke; project numbers: 1ZIA‐NS003154‐03, Z01‐AG000949‐02, and Z01‐ES101986). In addition, this work was supported by the Department of Defense (award W81XWH‐09‐2‐0128), The Michael J Fox Foundation for Parkinson's Research, and the ISCIII Grants PI 15/0878 (Fondos Feder) to V.A. and PI 15/01013 to J,H. This study was supported by grants from the Spanish Ministry of Economy and Competitiveness (PI14/01823, PI16/01575, PI18/01898, [SAF2006‐10126 (2006‐2009), SAF2010‐22329‐C02‐01 (2010‐2012), and SAF2013‐47939‐R (2013‐2018)]), co‐founded by ISCIII (Subdirección General de Evaluación y Fomento de la Investigación) and by Fondo Europeo de Desarrollo Regional (FEDER), the Consejería de Economía, Innovación, Ciencia y Empleo de la Junta de Andalucía (CVI‐02526, CTS‐7685), the Consejería de Salud y Bienestar Social de la Junta de Andalucía (PI‐0437‐2012, PI‐0471‐2013), the Sociedad Andaluza de Neurología, the Jacques and Gloria Gossweiler Foundation, the Fundación Alicia Koplowitz, and the Fundación Mutua Madrileña. Pilar Gómez‐Garre was supported by the “Miguel Servet” (from ISCIII16 FEDER) and “Nicolás Monardes” (from Andalusian Ministry of Health) programmes. Silvia Jesús Maestre was supported by the “Juan Rodés” programme, and Daniel Macías‐García was supported by the “Río Hortega” programme (both from ISCIII‐FEDER). Cristina Tejera Parrado was supported by VPPI‐US from the Universidad de Sevilla. This research has been conducted using samples from the HUVR‐IBiS Biobank (Andalusian Public Health System Biobank and ISCIII‐Red de Biobancos PT13/0010/0056). This work was also supported by the grant PSI2014‐57643 from the Junta de Andalucía to the CTS‐438 group and a research award from the Andalusian Society of Neurology.

Published
2019
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29. Discovery and functional prioritization of Parkinson's disease candidate genes from large-scale whole exome sequencing

Author

Jansen, Iris E, Ye, Hui, Gibbs, J Raphael, Illig, Thomas, Jónsson, Pálmi V, Lambert, Jean-Charles, Langford, Cordelia, Lees, Andrew, Lichtner, Peter, Limousin, Patricia, Lopez, Grisel, Lorenz, Delia, Lungu, Codrin, Nalls, Mike A, McNeill, Alisdair, Moorby, Catriona, Moore, Matthew, Morris, Huw R, Morrison, Karen E, Escott-Price, Valentina, Mudanohwo, Ese, O'Sullivan, Sean S, Pearson, Justin, Perlmutter, Joel S, Ryten, Mina, Pétursson, Hjörvar, Pollak, Pierre, Post, Bart, Potter, Simon, Ravina, Bernard, Revesz, Tamas, Riess, Olaf, Rivadeneira, Fernando, Sawcer, Stephen, Botia, Juan A, Schapira, Anthony, Scheffer, Hans, Shaw, Karen, Shoulson, Ira, Shulman, Joshua, Sidransky, Ellen, Smith, Colin, Spencer, Chris C A, Stefánsson, Hreinn, Bettella, Francesco, Vandrovcova, Jana, Stockton, Joanna D, Strange, Amy, Talbot, Kevin, Tanner, Carlie M, Tashakkori-Ghanbaria, Avazeh, Tison, François, Trabzuni, Daniah, Traynor, Bryan J, Uitterlinden, André G, Velseboer, Daan, Simon Sanchez, Javier, Vidailhet, Marie, Walker, Robert, van de Warrenburg, Bart, Wickremaratchi, Mirdhu, Williams, Nigel, Williams-Gray, Caroline H, Winder-Rhodes, Sophie, Stefánsson, Kári, Martinez, Maria, Wood, Nicholas W, Castillo Lizardo, Melissa Gissel, Hardy, John, Heutink, Peter, Brice, Alexis, Gasser, Thomas, Singleton, Andrew B, Rizzu, Patrizia, Blauwendraat, Cornelis, Chouhan, Amit K, Heetveld, Sasja, Li, Yarong, Yogi, Puja, Amin, Najaf, van Duijn, Cornelia M, Consortium, International Parkinson’s Disease Genetics, David, Della C, Nollen, Ellen A, Lechler, Marie C, Jain, Shushant, Shulman, Joshua M, Plagnol, Vincent, Hernandez, Dena G, Sharma, Manu, Sheerin, Una-Marie, Saad, Mohamad, SimónSánchez, Javier, Schulte, Claudia, Michels, Helen, Lesage, Suzanne, Sveinbjörnsdóttir, Sigurlaug, Arepalli, Sampath, Barker, Roger, Ben-Shlomo, Yoav, Berendse, Henk W, Berg, Daniela, Bhatia, Kailash, de Bie, Rob M A, Biffi, Alessandro, Seinstra, Renée I, Bloem, Bas, Bochdanovits, Zoltan, Bonin, Michael, Bras, Jose M, Brockmann, Kathrin, Brooks, Janet, Burn, David J, Majounie, Elisa, Lubbe, Steven, Price, Ryan, Lubbe, Steven J, Nicolas, Aude, Charlesworth, Gavin, Chen, Honglei, Chinnery, Patrick F, Chong, Sean, Clarke, Carl E, Cookson, Mark R, Cooper, J Mark, Corvol, Jean Christophe, Drouet, Valérie, Counsell, Carl, Damier, Philippe, Dartigues, Jean-François, Deloukas, Panos, Deuschl, Günther, Dexter, David T, van Dijk, Karin D, Dillman, Allissa, Durif, Frank, Dürr, Alexandra, Edkins, Sarah, Evans, Jonathan R, Foltynie, Thomas, Dong, Jing, Gardner, Michelle, Goate, Alison, Gray, Emma, Guerreiro, Rita, Harris, Clare, van Hilten, Jacobus J, Hofman, Albert, Hollenbeck, Albert, Holton, Janice, Hu, Michele, Wurster, Isabel, Mätzler, Walter, Hudson, Gavin, Hunt, Sarah E, Huttenlocher, Johanna, Epidemiology, Neurology, Amsterdam Neuroscience - Neurodegeneration, Human genetics, ANS - Neurodegeneration, Graduate School, ANS - Neuroinfection & -inflammation, Botia, Juan A [0000-0002-6992-598X], Chouhan, Amit K [0000-0003-2991-6402], Amin, Najaf [0000-0002-8944-1771], van Duijn, Cornelia M [0000-0002-2374-9204], David, Della C [0000-0001-8597-9470], and Apollo - University of Cambridge Repository

Subjects
0301 basic medicine, Candidate gene, G-PATCH, Parkinson's disease, methods [Sequence Analysis, DNA], Compound heterozygosity, AXON GUIDANCE, Animals, Genetically Modified, DOMAIN-CONTAINING 2, genetics [Parkinson Disease], Exome, Child, Cells, Cultured, Exome sequencing, Genetics, genetics [Drosophila melanogaster], High-Throughput Nucleotide Sequencing, Parkinson Disease, Genomics, Middle Aged, Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3], Mitochondria, ALZHEIMERS-DISEASE, Drosophila melanogaster, Whole-exome sequencing, genetics [alpha-Synuclein], alpha-Synuclein, genetics [Caenorhabditis elegans], RNA Interference, Adult, methods [High-Throughput Nucleotide Sequencing], NETWORK ANALYSIS, Adolescent, Biology, Loss-of-function, Young Adult, 03 medical and health sciences, α-synuclein, SDG 3 - Good Health and Well-being, ddc:570, Functional screening, Animals, Humans, Animal model, Genetic Predisposition to Disease, Allele, Caenorhabditis elegans, Parkin, RECEPTOR TYROSINE PHOSPHATASE, Research, RETROMER COMPLEX, Rare variants, Sequence Analysis, DNA, Human genetics, Retromer complex, DROSOPHILA MODEL, Disease Models, Animal, 030104 developmental biology, Case-Control Studies, Parkinson’s disease, CAENORHABDITIS-ELEGANS
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. Electronic supplementary material The online version of this article (doi:10.1186/s13059-017-1147-9) contains supplementary material, which is available to authorized users.

Published
2017
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