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. 2019 Oct;15(10):1333-1347.
doi: 10.1016/j.jalz.2019.06.4950. Epub 2019 Aug 28.

Genome-wide association analysis of dementia and its clinical endophenotypes reveal novel loci associated with Alzheimer's disease and three causality networks: The GR@ACE project

Sonia Moreno-Grau  1 Itziar de Rojas  2 Isabel Hernández  1 Inés Quintela  3 Laura Montrreal  2 Montserrat Alegret  1 Begoña Hernández-Olasagarre  2 Laura Madrid  4 Antonio González-Perez  4 Olalla Maroñas  3 Maitée Rosende-Roca  2 Ana Mauleón  2 Liliana Vargas  2 Asunción Lafuente  2 Carla Abdelnour  1 Octavio Rodríguez-Gómez  1 Silvia Gil  2 Miguel Ángel Santos-Santos  2 Ana Espinosa  1 Gemma Ortega  1 Ángela Sanabria  1 Alba Pérez-Cordón  2 Pilar Cañabate  1 Mariola Moreno  2 Silvia Preckler  2 Susana Ruiz  1 Nuria Aguilera  2 Juan Antonio Pineda  5 Juan Macías  5 Emilio Alarcón-Martín  6 Oscar Sotolongo-Grau  2 GR@ACE consortiumDEGESCO consortiumAlzheimer's Disease Neuroimaging InitiativeMarta Marquié  2 Gemma Monté-Rubio  2 Sergi Valero  1 Alba Benaque  2 Jordi Clarimón  7 Maria Jesus Bullido  8 Guillermo García-Ribas  9 Pau Pástor  10 Pascual Sánchez-Juan  11 Victoria Álvarez  12 Gerard Piñol-Ripoll  13 Jose Maria García-Alberca  14 José Luis Royo  15 Emilio Franco  16 Pablo Mir  17 Miguel Calero  18 Miguel Medina  19 Alberto Rábano  20 Jesús Ávila  21 Carmen Antúnez  22 Luis Miguel Real  23 Adelina Orellana  2 Ángel Carracedo  24 María Eugenia Sáez  4 Lluís Tárraga  1 Mercè Boada  1 Agustín Ruiz  25
Collaborators, Affiliations
Free article

Genome-wide association analysis of dementia and its clinical endophenotypes reveal novel loci associated with Alzheimer's disease and three causality networks: The GR@ACE project

Sonia Moreno-Grau et al. Alzheimers Dement. 2019 Oct.
Free article

Abstract

Introduction: Large variability among Alzheimer's disease (AD) cases might impact genetic discoveries and complicate dissection of underlying biological pathways.

Methods: Genome Research at Fundacio ACE (GR@ACE) is a genome-wide study of dementia and its clinical endophenotypes, defined based on AD's clinical certainty and vascular burden. We assessed the impact of known AD loci across endophenotypes to generate loci categories. We incorporated gene coexpression data and conducted pathway analysis per category. Finally, to evaluate the effect of heterogeneity in genetic studies, GR@ACE series were meta-analyzed with additional genome-wide association study data sets.

Results: We classified known AD loci into three categories, which might reflect the disease clinical heterogeneity. Vascular processes were only detected as a causal mechanism in probable AD. The meta-analysis strategy revealed the ANKRD31-rs4704171 and NDUFAF6-rs10098778 and confirmed SCIMP-rs7225151 and CD33-rs3865444.

Discussion: The regulation of vasculature is a prominent causal component of probable AD. GR@ACE meta-analysis revealed novel AD genetic signals, strongly driven by the presence of clinical heterogeneity in the AD series.

Keywords: Alzheimer's disease; Biological pathway; Cerebral amyloid angiopathy; GWAS; Vascular pathology.

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