The epigenetic and metabolic language of the circadian clock

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Abstract

The circadian clock controls a large variety of neuronal, endocrine, behavioral and physiological responses in mammals. This control is exerted in large part at the transcriptional level on genes expressed in a cyclic manner. A highly specialized transcriptional machinery based on clock regulatory factors organized in feedback autoregulatory loops governs a significant portion of the genome. These oscillations in gene expression are paralleled by critical events of chromatin remodeling that appear to provide plasticity to circadian regulation. Specifically, the NAD+-dependent deacetylases SIRT1 and SIRT6 have been linked to circadian control of gene expression. This and additional accumulating evidence shows that the circadian epigenome appears to share intimate links with cellular metabolic processes and has remarkable plasticity, showing reprogramming in response to nutritional challenges. In addition to SIRT1 and SIRT6, a number of chromatin remodelers have been implicated in clock control, including the histone H3K4 tri-methyltransferase MLL1. Deciphering the molecular mechanisms that link metabolism, epigenetic control and circadian responses will provide valuable insights towards innovative strategies of therapeutic intervention.

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CITATION STYLE

APA

Sassone-Corsi, P. (2016). The epigenetic and metabolic language of the circadian clock. Research and Perspectives in Endocrine Interactions, 0, 1–11. https://doi.org/10.1007/978-3-319-27069-2_1

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