| Literature DB >> 34482628 |
Yiyi Ma1, Lei Yu2,3, Marta Olah1, Rebecca Smith4, Stephanie R Oatman5, Mariet Allen5, Ehsan Pishva4, Bin Zhang6,7, Vilas Menon1, Nilüfer Ertekin-Taner5,8, Katie Lunnon4, David A Bennett2,3, Hans-Ulrich Klein1, Philip L De Jager1,9.
Abstract
Not all apolipoprotein E (APOE) ε4 carriers who survive to advanced age develop Alzheimer's disease (AD); factors attenuating the risk of ε4 on AD may exist. Guided by the top ε4-attenuating signals from methylome-wide association analyses (N = 572, ε4+ and ε4-) of neurofibrillary tangles and neuritic plaques, we conducted a meta-analysis for pathological AD within the ε4+ subgroups (N = 235) across four independent collections of brains. Cortical RNA-seq and microglial morphology measurements were used in functional analyses. Three out of the four significant CpG dinucleotides were captured by one principal component (PC1), which interacts with ε4 on AD, and is associated with expression of innate immune genes and activated microglia. In ε4 carriers, reduction in each unit of PC1 attenuated the odds of AD by 58% (odds ratio = 2.39, 95% confidence interval = [1.64,3.46], P = 7.08 × 10-6 ). An epigenomic factor associated with a reduced proportion of activated microglia (epigenomic factor of activated microglia, EFAM) appears to attenuate the risk of ε4 on AD.Entities:
Keywords: Alzheimer's disease; apolipoprotein E; epigenome; microglia
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Year: 2021 PMID: 34482628 PMCID: PMC9475136 DOI: 10.1002/alz.12425
Source DB: PubMed Journal: Alzheimers Dement ISSN: 1552-5260 Impact factor: 16.655