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Circadian alterations during early stages of Alzheimer's disease are associated with aberrant cycles of DNA methylation in BMAL1

Peter Cronin, Michael J. McCarthy, Andrew Lim, David P. Salmon, Douglas Galasko, Eliezer Masliah, Philip L. De Jager, David A. Bennett, Paula Desplats

Alzheimer s & Dementia · 2016 · ▲ 147 citations

Epigenetic alterations Cell culture / in vitro

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Abstract

INTRODUCTION: Circadian alterations are prevalent in Alzheimer's disease (AD) and may contribute to cognitive impairment, behavioral symptoms, and neurodegeneration. Epigenetic mechanisms regulate the circadian clock, and changes in DNA methylation have been reported in AD brains, but the pathways that mediate circadian deregulation in AD are incompletely understood. We hypothesized that aberrant DNA methylation may affect circadian rhythms in AD. METHODS: We investigated DNA methylation, transcription, and expression of BMAL1, a positive regulator of the circadian clock, in cultured fibroblasts and brain samples from two independent cohorts of aging and AD. RESULTS: DNA methylation modulated rhythmic expression of clock genes in cultured fibroblasts. Moreover, rhythmic methylation of BMAL1 was altered in AD brains and fibroblasts and correlated with transcription cycles. DISCUSSION: Our results indicate that cycles of DNA methylation contribute to the regulation of BMAL1 rhythms in the brain. Hence, aberrant epigenetic patterns may be linked to circadian alterations in AD.

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Provenance

Source: OpenAlex
DOI: 10.1016/j.jalz.2016.10.003
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Fetched: 2026-06-03 MST

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APA

Cronin, P., McCarthy, M.J., Lim, A., Salmon, D.P., Galasko, D., Masliah, E., Jager, P.L.D., Bennett, D.A., & Desplats, P. (2016). Circadian alterations during early stages of Alzheimer's disease are associated with aberrant cycles of DNA methylation in BMAL1. <em>Alzheimer s & Dementia</em>. https://doi.org/10.1016/j.jalz.2016.10.003

Vancouver

Cronin P, McCarthy MJ, Lim A, Salmon DP, Galasko D, Masliah E, et al. Circadian alterations during early stages of Alzheimer's disease are associated with aberrant cycles of DNA methylation in BMAL1. Alzheimer s & Dementia. 2016. doi:10.1016/j.jalz.2016.10.003.

BibTeX

@article{peter2016Circad, title = {Circadian alterations during early stages of Alzheimer's disease are associated with aberrant cycles of DNA methylation in BMAL1}, author = {Peter Cronin and Michael J. McCarthy and Andrew Lim and David P. Salmon and Douglas Galasko and Eliezer Masliah and Philip L. De Jager and David A. Bennett and Paula Desplats}, journal = {Alzheimer s & Dementia}, year = {2016}, doi = {10.1016/j.jalz.2016.10.003}, }