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. 2017 Jul;13(7):727-738.
doi: 10.1016/j.jalz.2016.12.012. Epub 2017 Feb 7.

Transethnic genome-wide scan identifies novel Alzheimer's disease loci

Collaborators, Affiliations

Transethnic genome-wide scan identifies novel Alzheimer's disease loci

Gyungah R Jun et al. Alzheimers Dement. 2017 Jul.

Abstract

Introduction: Genetic loci for Alzheimer's disease (AD) have been identified in whites of European ancestry, but the genetic architecture of AD among other populations is less understood.

Methods: We conducted a transethnic genome-wide association study (GWAS) for late-onset AD in Stage 1 sample including whites of European Ancestry, African-Americans, Japanese, and Israeli-Arabs assembled by the Alzheimer's Disease Genetics Consortium. Suggestive results from Stage 1 from novel loci were followed up using summarized results in the International Genomics Alzheimer's Project GWAS dataset.

Results: Genome-wide significant (GWS) associations in single-nucleotide polymorphism (SNP)-based tests (P < 5 × 10-8) were identified for SNPs in PFDN1/HBEGF, USP6NL/ECHDC3, and BZRAP1-AS1 and for the interaction of the (apolipoprotein E) APOE ε4 allele with NFIC SNP. We also obtained GWS evidence (P < 2.7 × 10-6) for gene-based association in the total sample with a novel locus, TPBG (P = 1.8 × 10-6).

Discussion: Our findings highlight the value of transethnic studies for identifying novel AD susceptibility loci.

Keywords: APOE interaction; Alzheimer's disease; Genome-wide association; Transethnic.

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Figures

Figure 1
Figure 1
Regional association plots in the combined stage 1 and stage 2 sample including main effects at (A) PFDN1/HBEGF, (B) USP6NL/ECHDC3, (C) BZRAP1-AS1, and (D) SNP*APOE ε4 interaction near NFIC.
Figure 1
Figure 1
Regional association plots in the combined stage 1 and stage 2 sample including main effects at (A) PFDN1/HBEGF, (B) USP6NL/ECHDC3, (C) BZRAP1-AS1, and (D) SNP*APOE ε4 interaction near NFIC.
Figure 1
Figure 1
Regional association plots in the combined stage 1 and stage 2 sample including main effects at (A) PFDN1/HBEGF, (B) USP6NL/ECHDC3, (C) BZRAP1-AS1, and (D) SNP*APOE ε4 interaction near NFIC.
Figure 1
Figure 1
Regional association plots in the combined stage 1 and stage 2 sample including main effects at (A) PFDN1/HBEGF, (B) USP6NL/ECHDC3, (C) BZRAP1-AS1, and (D) SNP*APOE ε4 interaction near NFIC.
Figure 2
Figure 2
Forest plots for by ethnicity and stage for (A) rs11168036 atPFDN1/HBEGF, (B) rs7920721 at USP6NL/ECHDC3, (C) rs2632516 at BZRAP1-AS1, (D) NFIC rs9749589*APOE ε4 interaction.
Figure 2
Figure 2
Forest plots for by ethnicity and stage for (A) rs11168036 atPFDN1/HBEGF, (B) rs7920721 at USP6NL/ECHDC3, (C) rs2632516 at BZRAP1-AS1, (D) NFIC rs9749589*APOE ε4 interaction.
Figure 2
Figure 2
Forest plots for by ethnicity and stage for (A) rs11168036 atPFDN1/HBEGF, (B) rs7920721 at USP6NL/ECHDC3, (C) rs2632516 at BZRAP1-AS1, (D) NFIC rs9749589*APOE ε4 interaction.
Figure 2
Figure 2
Forest plots for by ethnicity and stage for (A) rs11168036 atPFDN1/HBEGF, (B) rs7920721 at USP6NL/ECHDC3, (C) rs2632516 at BZRAP1-AS1, (D) NFIC rs9749589*APOE ε4 interaction.

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