RT Journal Article T1 The Genetic Architecture of Parkinson Disease in Spain: Characterizing Population-Specific Risk, Differential Haplotype Structures, and Providing Etiologic Insight. A1 Bandres-Ciga, Sara A1 Ahmed, Sarah A1 Sabir, Marya S A1 Blauwendraat, Cornelis A1 Adarmes-Gómez, Astrid D A1 Bernal-Bernal, Inmaculada A1 Bonilla-Toribio, Marta A1 Buiza-Rueda, Dolores A1 Carrillo, Fátima A1 Carrión-Claro, Mario A1 Gómez-Garre, Pilar A1 Jesús, Silvia A1 Labrador-Espinosa, Miguel A A1 Macias, Daniel A1 Méndez-Del-Barrio, Carlota A1 Periñán-Tocino, Teresa A1 Tejera-Parrado, Cristina A1 Vargas-González, Laura A1 Diez-Fairen, Monica A1 Alvarez, Ignacio A1 Tartari, Juan Pablo A1 Buongiorno, Mariateresa A1 Aguilar, Miquel A1 Gorostidi, Ana A1 Bergareche, Jesús Alberto A1 Mondragon, Elisabet A1 Vinagre-Aragon, Ana A1 Croitoru, Ioana A1 Ruiz-Martínez, Javier A1 Dols-Icardo, Oriol A1 Kulisevsky, Jaime A1 Marín-Lahoz, Juan A1 Pagonabarraga, Javier A1 Pascual-Sedano, Berta A1 Ezquerra, Mario A1 Cámara, Ana A1 Compta, Yaroslau A1 Fernández, Manel A1 Fernández-Santiago, Rubén A1 Muñoz, Esteban A1 Tolosa, Eduard A1 Valldeoriola, Francesc A1 Gonzalez-Aramburu, Isabel A1 Sanchez Rodriguez, Antonio A1 Sierra, María A1 Menéndez-González, Manuel A1 Blazquez, Marta A1 Garcia, Ciara A1 Suarez-San Martin, Esther A1 García-Ruiz, Pedro A1 Martínez-Castrillo, Juan Carlos A1 Vela-Desojo, Lydia A1 Ruz, Clara A1 Barrero, Francisco Javier A1 Escamilla-Sevilla, Francisco A1 Mínguez-Castellanos, Adolfo A1 Cerdan, Debora A1 Tabernero, Cesar A1 Gomez Heredia, Maria Jose A1 Perez Errazquin, Francisco A1 Romero-Acebal, Manolo A1 Feliz, Cici A1 Lopez-Sendon, Jose Luis A1 Mata, Marina A1 Martínez Torres, Irene A1 Kim, Jonggeol Jeffrey A1 Dalgard, Clifton L A1 American Genome Center, A1 Brooks, Janet A1 Saez-Atienzar, Sara A1 Gibbs, J Raphael A1 Jorda, Rafael A1 Botia, Juan A A1 Bonet-Ponce, Luis A1 Morrison, Karen E A1 Clarke, Carl A1 Tan, Manuela A1 Morris, Huw A1 Edsall, Connor A1 Hernandez, Dena A1 Simon-Sanchez, Javier A1 Nalls, Mike A A1 Scholz, Sonja W A1 Jimenez-Escrig, Adriano A1 Duarte, Jacinto A1 Vives, Francisco A1 Duran, Raquel A1 Hoenicka, Janet A1 Alvarez, Victoria A1 Infante, Jon A1 Marti, Maria José A1 Clarimón, Jordi A1 López de Munain, Adolfo A1 Pastor, Pau A1 Mir, Pablo A1 Singleton, Andrew A1 International Parkinson Disease Genomics Consortium, K1 Parkinson's disease K1 Spanish population K1 age at onset K1 polygenic risk score K1 risk haplotype AB 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. To perform the largest PD genome-wide association study restricted to a single country. 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. 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. 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. © 2019 International Parkinson and Movement Disorder Society. YR 2019 FD 2019-10-29 LK http://hdl.handle.net/10668/15500 UL http://hdl.handle.net/10668/15500 LA en DS RISalud RD Apr 11, 2025