Cited by 137Circadian rhythm and melatoninStress Responses and CortisolEstrogen and related hormone effects

Glucocorticoid ultradian rhythmicity directs cyclical gene pulsing of the clock gene period 1 in rat hippocampus

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Conway‐Campbell, B. L ., Sarabdjitsingh, R. A., McKenna, M. A., Pooley, J. R., Kershaw, Y. M., Meijer, O. C., De Kloet, E. R., Lightman, S. L .·2010·Journal of Neuroendocrinology

Abstract

In vivo glucocorticoid (GC) secretion exhibits a distinctive ultradian rhythmicity. The lipophilic hormone can rapidly diffuse into cells, although only the pulse peak is of sufficient amplitude to activate the low affinity glucocorticoid receptor (GR). Discrete pulses readily access brain regions such as the hippocampus where GR expression is enriched and known to regulate neuronal function, including memory and learning processes. In the present study, we have tested the hypothesis that GR brain targets are responsive to ultradian GC rhythmicity. We have used adrenalectomised rats replaced with pulses of corticosterone to determine the transcriptional effects of ultradian pulses in the hippocampus. Confocal microscopy confirmed that each GC pulse results in transient GR nuclear localisation in hippocampal CA1 neurones. Concomitant GR activation and DNA binding was demonstrated by synthetic glucocorticoid response element oligonucleotide binding, and verified for the Clock gene Period 1 promoter region by chromatin immunoprecipitation assays. Strikingly each GC pulse induced a ‘burst’ of transcription of Period 1 measured by heterogeneous nuclear RNA quantitative polymerase chain reaction. The net effect of pulsatile GC exposure on accumulation of the mature transcript was also assessed, revealing a plateau of mRNA levels throughout the time course of pulsatile exposure, indicating the pulse timing works optimally for steady state Per1 expression. The plateau dropped to baseline within 120 min of the final pulse, indicating a relatively short half‐life for hippocampal Per1. The significance of this strict temporal control is that any perturbation to the pulse frequency or duration would have rapid quantitative effects on the levels of Per1. This in turn could affect hippocampal function, especially circadian related memory and learning processes.

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Crossref · 10.1111/j.1365-2826.2010.02051.x

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Authors
Conway‐Campbell, B. L., Sarabdjitsingh, R. A., McKenna, M. A., Pooley, J. R., Kershaw, Y. M., Meijer, O. C., De Kloet, E. R., & Lightman, S. L.
Affiliations
  • Leiden University Medical Center (NL)
  • University of Bristol (GB)
Venue
Journal of Neuroendocrinology
Publisher
Wiley
Published
2010-09-15
Volume
22
Issue
10
Pages
1093-1100
ISSN
  • 0953-8194 (ISSN-L)
  • 1365-2826
OpenAlex
W2127035635
Cited by
137
References
47
Citations by year
2026: 3 · 2025: 3 · 2024: 3 · 2023: 6 · 2022: 7 · 2021: 7 · 2020: 8 · 2019: 8 · 2018: 10 · 2017: 12 · 2016: 18 · 2015: 17 · 2014: 12 · 2013: 5 · 2012: 10
FWCI
3.29
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Explore Bristol Research (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Leiden Repository (Leiden University) (submittedVersion)
Funders
  • Wellcome Trust (089647, 089647/Z/09/Z)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek
  • Biotechnology and Biological Sciences Research Council (BB/H015779/1)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
Keywords
glucocorticoid receptor, circadian clock, hippocampus, CA1 neurons, transcriptional bursting, mRNA half-life, glucocorticoid response element, adrenalectomy
MeSH terms
Activity Cycles, Adrenalectomy, Animals, Corticosterone, Gene Expression Regulation, Glucocorticoids, Hippocampus, Periodicity, Promoter Regions, Genetic, Receptors, Glucocorticoid, Rats, Sprague-Dawley, Response Elements, Rats, Period Circadian Proteins

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