This Sequence Analysis Consortium (SAC) brings together experts in Alzheimer's disease (AD), human genetics, biostatistics and genome sciences to identify risk and protective single nucleotide and copy number variants (SNVs and CNVs) influencing AD and AD-related endophenotypes. This SAC will harmonize and integrate genomic and phenotype data (generated by Core C) from the AD Sequencing Project (ADSP) and other data resources and use the most informative analytic methods (as determined by Core B) to identify novel risk and protective alleles. This SAC is partially based on the ADSP case-control study design with whole exome sequencing in 6,888 cases who developed AD despite an 'a priori low risk'and are likely enriched for novel risk variants, and 14,400 cognitivly normal older controls, a subset of whom are enriched for protective variants. To allow novel discovery in minority populations that carry a disproportionate burden of AD, we will analyze exome sequence data and well-characterized endophenotypes, including verbal memory and hippocampal volume (harmonized by Core D). Replication will be afforded using targeted sequence and genotype data in 50,000 cases and controls and 40,000 individuals with endophenotype data. We will seek to identify SNVs (Project 1) and CNVs (Project 2) contributing to AD susceptibility and protection. Integrated and annotated (using ENCODE and the Epigenomic Roadmap Projects) SNVs and CNVs data from the ADSP families with whole genome sequencing, as well as other familial AD resources will be used for genetic linkage and IBD analyses (Project 3) to identify AD susceptibility or protective alleles in highly-ascertained, multiplex families. The case-control design (Projects 1 and 2) and the family design (Project 3) complement each other to maximize discovery of AD variants. In order to promote AD translational research and discovery, we will collaborate with other researchers to undertake further replication and functional studies, create public resources with integrated genomic and phenotypic data, and make available computational algorithms through the public domain. Identification of variants in genes leading to risk and protection from AD may ultimately lead to novel treatments and prevention strategies.

Public Health Relevance

Alzheimer's disease is a common disease of aging characterized by loss of memory, and Alzheimer's disease clusters in families. This Project seeks to identify genes associated with increased risk of Alzheimer's Disease or protection from it. This newly discovered genetic information may help to identify novel treatments for this debilitating condition.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project--Cooperative Agreements (U01)
Project #
1U01AG049507-01
Application #
8836770
Study Section
Special Emphasis Panel (ZAG1-ZIJ-5 (J1))
Program Officer
Miller, Marilyn
Project Start
2014-06-15
Project End
2018-05-31
Budget Start
2014-06-15
Budget End
2015-05-31
Support Year
1
Fiscal Year
2014
Total Cost
$714,250
Indirect Cost
$242,944
Name
University of Washington
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
605799469
City
Seattle
State
WA
Country
United States
Zip Code
98195
Sondhi, Arjun; Rice, Kenneth Martin (2018) Fast permutation tests and related methods, for association between rare variants and binary outcomes. Ann Hum Genet 82:93-101
Kunji, Khalid; Ullah, Ehsan; Nato Jr, Alejandro Q et al. (2018) GIGI-Quick: a fast approach to impute missing genotypes in genome-wide association family data. Bioinformatics 34:1591-1593
Raghavan, Neha S; Brickman, Adam M; Andrews, Howard et al. (2018) Whole-exome sequencing in 20,197 persons for rare variants in Alzheimer's disease. Ann Clin Transl Neurol 5:832-842
Blue, Elizabeth E; Bis, Joshua C; Dorschner, Michael O et al. (2018) Genetic Variation in Genes Underlying Diverse Dementias May Explain a Small Proportion of Cases in the Alzheimer's Disease Sequencing Project. Dement Geriatr Cogn Disord 45:1-17
Nafikov, Rafael A; Nato Jr, Alejandro Q; Sohi, Harkirat et al. (2018) Analysis of pedigree data in populations with multiple ancestries: Strategies for dealing with admixture in Caribbean Hispanic families from the ADSP. Genet Epidemiol 42:500-515
Blue, E E; Yu, C-E; Thornton, T A et al. (2018) Variants regulating ZBTB4 are associated with age-at-onset of Alzheimer's disease. Genes Brain Behav 17:e12429
Blue, Elizabeth M; Brown, Lisa A; Conomos, Matthew P et al. (2016) Estimating relationships between phenotypes and subjects drawn from admixed families. BMC Proc 10:357-362
Saad, Mohamad; Nato Jr, Alejandro Q; Grimson, Fiona L et al. (2016) Identity-by-descent estimation with population- and pedigree-based imputation in admixed family data. BMC Proc 10:295-301
Kenna, Kevin P; van Doormaal, Perry T C; Dekker, Annelot M et al. (2016) NEK1 variants confer susceptibility to amyotrophic lateral sclerosis. Nat Genet 48:1037-42
Wijsman, Ellen M (2016) Family-based approaches: design, imputation, analysis, and beyond. BMC Genet 17 Suppl 2:9

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