Association of education with Aβ burden in preclinical familial and sporadic Alzheimer disease.

TitleAssociation of education with Aβ burden in preclinical familial and sporadic Alzheimer disease.
Publication TypeJournal Article
Year of Publication2020
AuthorsGonneaud J, Bedetti C, Binette APichet, Benzinger TLS, Morris JC, Bateman RJ, Poirier J, Breitner JCS, Villeneuve S
Corporate AuthorsDIAN Study Group and the PREVENT-AD Research Group
JournalNeurology
Volume95
Issue11
Paginatione1554-e1564
Date Published2020 09 15
ISSN1526-632X
KeywordsAdolescent, Adult, Aged, Aged, 80 and over, Alzheimer Disease, Amyloid beta-Peptides, Apolipoprotein E4, Cohort Studies, Cross-Sectional Studies, Educational Status, Female, Humans, Longitudinal Studies, Male, Middle Aged, Young Adult
Abstract

OBJECTIVE: To determine whether years of education and the ε4 risk allele at influence β-amyloid (Aβ) pathology similarly in asymptomatic individuals with a family history of sporadic Alzheimer disease (AD) and presymptomatic autosomal dominant AD mutation carriers.METHODS: We analyzed cross-sectional data from 106 asymptomatic individuals with a parental history of sporadic AD (PREVENT-AD cohort; age 67.28 ± 4.72 years) and 117 presymptomatic autosomal dominant AD mutation carriers (DIAN cohort; age 35.04 ± 9.43 years). All participants underwent structural MRI and Aβ-PET imaging. In each cohort we investigated the influence of years of education, ε4 status, and their interaction on Aβ-PET.RESULTS: Asymptomatic individuals with a parental history of sporadic AD showed increased Aβ burden associated with ε4 carriage and lower level of education, but no interaction between these. Presymptomatic mutation carriers of autosomal dominant AD showed no relation between ε4 and Aβ burden, but increasing level of education was associated with reduced Aβ burden. The association between educational attainment and Aβ burden was similar in the 2 cohorts.CONCLUSIONS: While the ε4 allele confers increased tendency toward Aβ accumulation in sporadic AD only, protective environmental factors, like increased education, may promote brain resistance against Aβ pathology in both sporadic and autosomal dominant AD.

DOI10.1212/WNL.0000000000010314
Alternate JournalNeurology
PubMed ID32759192
Grant ListPJT-148963 / / CIHR / Canada
U19 AG032438 / AG / NIA NIH HHS / United States