1. Alzheimer's disease: early alterations in brain DNA methylation at ANK1, BIN1, RHBDF2 and other loci.
- Author
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De Jager PL, Srivastava G, Lunnon K, Burgess J, Schalkwyk LC, Yu L, Eaton ML, Keenan BT, Ernst J, McCabe C, Tang A, Raj T, Replogle J, Brodeur W, Gabriel S, Chai HS, Younkin C, Younkin SG, Zou F, Szyf M, Epstein CB, Schneider JA, Bernstein BE, Meissner A, Ertekin-Taner N, Chibnik LB, Kellis M, Mill J, and Bennett DA
- Subjects
- Aged, Aged, 80 and over, Alzheimer Disease epidemiology, Amyloidosis epidemiology, Amyloidosis genetics, Amyloidosis pathology, Brain pathology, Brain physiology, CpG Islands genetics, Female, Genetic Predisposition to Disease epidemiology, Genetic Predisposition to Disease genetics, Genome-Wide Association Study, Humans, Intracellular Signaling Peptides and Proteins, Male, Middle Aged, Protein Interaction Maps, Adaptor Proteins, Signal Transducing genetics, Alzheimer Disease genetics, Alzheimer Disease pathology, Ankyrins genetics, Carrier Proteins genetics, DNA Methylation genetics, Nuclear Proteins genetics, Tumor Suppressor Proteins genetics
- Abstract
We used a collection of 708 prospectively collected autopsied brains to assess the methylation state of the brain's DNA in relation to Alzheimer's disease (AD). We found that the level of methylation at 71 of the 415,848 interrogated CpGs was significantly associated with the burden of AD pathology, including CpGs in the ABCA7 and BIN1 regions, which harbor known AD susceptibility variants. We validated 11 of the differentially methylated regions in an independent set of 117 subjects. Furthermore, we functionally validated these CpG associations and identified the nearby genes whose RNA expression was altered in AD: ANK1, CDH23, DIP2A, RHBDF2, RPL13, SERPINF1 and SERPINF2. Our analyses suggest that these DNA methylation changes may have a role in the onset of AD given that we observed them in presymptomatic subjects and that six of the validated genes connect to a known AD susceptibility gene network.
- Published
- 2014
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