New insights into the genetic etiology of Alzheimer's disease and related dementias

Céline Bellenguez, Fahri Küçükali, Iris E Jansen, Luca Kleineidam, Sonia Moreno-Grau, Najaf Amin, Adam C Naj, Rafael Campos-Martin, Benjamin Grenier-Boley, Victor Andrade, Peter A Holmans, Anne Boland, Vincent Damotte, Sven J van der Lee, Marcos R Costa, Teemu Kuulasmaa, Qiong Yang, Itziar de Rojas, Joshua C Bis, Amber YaqubIvana Prokic, Julien Chapuis, Shahzad Ahmad, Vilmantas Giedraitis, Dag Aarsland, Pablo Garcia-Gonzalez, Carla Abdelnour, Emilio Alarcón-Martín, Daniel Alcolea, Montserrat Alegret, Ignacio Alvarez, Victoria Álvarez, Nicola J Armstrong, Anthoula Tsolaki, Carmen Antúnez, Ildebrando Appollonio, Marina Arcaro, Silvana Archetti, Alfonso Arias Pastor, Beatrice Arosio, Lavinia Athanasiu, Henri Bailly, Nerisa Banaj, Miquel Baquero, Sandra Barral, Sune Fallgaard Nielsen, Børge G Nordestgaard, Jesper Qvist Thomassen, Anne Tybjærg-Hansen, Ruth Frikke-Schmidt, EADB, GR@CE, DEGESCO, EADI, GERAD, Demgene, FinnGen, ADGC, CHARGE

Abstract

Characterization of the genetic landscape of Alzheimer's disease (AD) and related dementias (ADD) provides a unique opportunity for a better understanding of the associated pathophysiological processes. We performed a two-stage genome-wide association study totaling 111,326 clinically diagnosed/'proxy' AD cases and 677,663 controls. We found 75 risk loci, of which 42 were new at the time of analysis. Pathway enrichment analyses confirmed the involvement of amyloid/tau pathways and highlighted microglia implication. Gene prioritization in the new loci identified 31 genes that were suggestive of new genetically associated processes, including the tumor necrosis factor alpha pathway through the linear ubiquitin chain assembly complex. We also built a new genetic risk score associated with the risk of future AD/dementia or progression from mild cognitive impairment to AD/dementia. The improvement in prediction led to a 1.6- to 1.9-fold increase in AD risk from the lowest to the highest decile, in addition to effects of age and the APOE ε4 allele.

OriginalsprogEngelsk
TidsskriftNature Genetics
Vol/bind54
Udgave nummer4
Sider (fra-til)412-436
Antal sider25
ISSN1061-4036
DOI
StatusUdgivet - apr. 2022

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