Alzheimer's Disease Polygenic Risk Score Is Not Associated With Cognitive Decline Among Older Adults With Type 2 Diabetes

Overview

Journal Front Aging Neurosci

Specialty Geriatrics

Date 2022 Sep 16

PMID 36110429

Authors

Sigalit B Manzali

Eric Yu

Ramit Ravona-Springer

Abigail Livny

Sapir Golan

Yuxia Ouyang

Orit Lesman-Segev

Lang Liu

Ithamar Ganmore

Anna Alkelai

Ziv Gan-Or

Hung-Mo Lin

Anthony Heymann

Michal Schnaider Beeri

Lior Greenbaum

Affiliations

Soon will be listed here.

Abstract

Objectives: Multiple risk loci for late-onset Alzheimer's disease (LOAD) have been identified. Type 2 diabetes (T2D) is a risk factor for cognitive decline, dementia and Alzheimer's disease (AD). We investigated the association of polygenic risk score (PRS) for LOAD with overall cognitive functioning and longitudinal decline, among older adults with T2D.

Methods: The study included 1046 Jewish participants from the Israel Diabetes and Cognitive Decline (IDCD) study, aged ≥ 65 years, diagnosed with T2D, and cognitively normal at baseline. The PRS included variants from 26 LOAD associated loci (at genome-wide significance level), and was calculated with and without Outcome measures, assessed in 18 months intervals, were global cognition and the specific domains of episodic memory, attention/working memory, executive functions, and language/semantic categorization. Random coefficient models were used for analysis, adjusting for demographic variables, T2D-related characteristics, and cardiovascular factors. Additionally, in a subsample of 202 individuals, we analyzed the association of PRS with the volumes of total gray matter, frontal lobe, hippocampus, amygdala, and white matter hyperintensities. Last, the association of PRS with amyloid beta (Aβ) burden was examined in 44 participants who underwent an F-flutemetamol PET scan.

Results: The PRS was not significantly associated with overall functioning or decline in global cognition or any of the specific cognitive domains. Similarly, following correction for multiple testing, there was no association with Aβ burden and other brain imaging phenotypes.

Conclusion: Our results suggest that the cumulative effect of LOAD susceptibility loci is not associated with a greater rate of cognitive decline in older adults with T2D, and other pathways may underlie this link.

Citing Articles

Genetic Prοpensity for Different Aspects of Dementia Pathology and Cognitive Decline in a Community Elderly Population.

Sampatakakis S, Mourtzi N, Hatzimanolis A, Koutsis G, Charisis S, Gkelmpesi I Int J Mol Sci. 2025; 26(3).

PMID: 39940679 PMC: 11817854. DOI: 10.3390/ijms26030910.

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