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FEBS Lett. 2019 Feb;593(4):423-432. doi: 10.1002/1873-3468.13328. Epub 2019 Feb 1.

Glucocorticoid receptor suppresses gene expression of Rev-erbα (Nr1d1) through interaction with the CLOCK complex.

Author information

1
Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan.
2
Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan.

Abstract

Glucocorticoids have various medical uses but are accompanied by side effects. The glucocorticoid receptor (GR) has been reported to regulate the clock genes, but the underlying mechanisms are incompletely understood. In this study, we focused on the suppressive effect of the GR on the expression of Rev-erbα (Nr1d1), an important component of the clock regulatory circuits. Here we show that the GR suppresses Rev-erbα expression via the formation of a complex with CLOCK and BMAL1, which binds to the E-boxes in the Nr1d1 promoter. In this GR-CLOCK-BMAL1 complex, the GR does not directly bind to DNA, which is referred to as tethering. These findings provide new insights into the role of the GR in the control of circadian rhythm.

KEYWORDS:

circadian rhythm; clock; glucocorticoid receptor; glucocorticoids; tethering

PMID:
30659595
DOI:
10.1002/1873-3468.13328

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