Eid A, Bihaqi SW, Hemme C, Gaspar JM, Hart RP, Zawia NH. Histone acetylation maps in aged mice developmentally exposed to lead: epigenetic drift and Alzheimer-related genes.
Epigenomics 2018;
10:573-583. [PMID:
29722544 DOI:
10.2217/epi-2017-0143]
[Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
AIM
Early life exposure to lead (Pb) has been shown to increase late life biomarkers involved in Alzheimer's disease (AD) pathology. Here, we tested the hypothesis that latent over expression of AD-related genes may be regulated through histone activation pathways.
METHODS
Chromatin immunoprecipitation sequencing was used to map the histone activation mark (H3K9Ac) to the mouse genome in developmentally Pb exposed mice on postnatal days 20, 270 and 700.
RESULTS
Exposure to Pb resulted in a global downregulation of H3K9Ac across the lifespan; except in genes associated with the Alzheimer pathway.
DISCUSSION
Early life exposure to Pb results in an epigenetic drift in H3K9Ac consistent with latent global gene repression. Alzheimer-related genes do not follow this trend.
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