Association of the top 20 Alzheimer's disease risk genes with [18F]flortaucipir PET.

Abstract

Introduction:

We previously reported genetic associations of the top Alzheimer's disease (AD) risk alleles with amyloid deposition and neurodegeneration. Here, we report the association of these variants with [18F]flortaucipir standardized uptake value ratio (SUVR).

Methods:

We analyzed the [18F]flortaucipir scans of 352 cognitively normal (CN), 160 mild cognitive impairment (MCI), and 54 dementia (DEM) participants from Alzheimer's Disease Neuroimaging Initiative (ADNI)2 and 3. We ran step-wise regression with log-transformed [18F]flortaucipir meta-region of interest SUVR as the outcome measure and genetic variants, age, sex, and apolipoprotein E (APOE) ε4 as predictors. The results were visualized using parametric mapping at familywise error cluster-level-corrected P < .05.

Results:

APOE ε4 showed significant (P < .05) associations with tau deposition across all disease stages. Other significantly associated genes include variants in ABCA7 in CN, CR1 in MCI, BIN1 and CASS4 in MCI and dementia participants.

Discussion:

We found significant associations to tau deposition for ABCA7, BIN1, CASS4, and CR1, in addition to APOE ε4. These four variants have been previously associated with tau metabolism through model systems.

• Authors: Eddie Stage, Shannon L Risacher, Kathleen A Lane, Sujuan Gao, Kwangsik Nho, Andrew J Saykin, Liana G Apostolova, Alzheimer's Disease Neuroimaging Initiative
• Journal: Alzheimer's & dementia (Amsterdam, Netherlands) (Alzheimers Dement (Amst)) Vol. 14 Issue 1 Pg. e12308 ( 2022) ISSN: 2352-8729 [Print] United States
• PMID: 35592828 (Publication Type: Journal Article)
• Copyright: © 2022 The Authors. Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring published by Wiley Periodicals, LLC on behalf of Alzheimer's Association.