ArticleJournal of neuroendocrinology2022
Glucocorticoid regulation of diurnal spine plasticity in the murine ventromedial prefrontal cortex.
Article in Journal of neuroendocrinology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 7 citations in OpenAlex.
- Daily rhythms in fear extinction memory reflect structural and functional changes in a prefrontal-amygdala circuit.Brain structure & function · 2026Article
- Circadian Changes in CA1 LTP Are Driven by Shifts in Excitation-Inhibition Balance and Reverse Direction after Puberty in Mice.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2026Article
- Circadian Rhythms in Plasticity Markers Are Regulated by the Suprachiasmatic Nucleus and Local Circadian Oscillators in the Rodent Neocortex.Molecular neurobiology · 2025Article
- Sensory neurostimulation promotes stress resilience with frequency-specificity.bioRxiv : the preprint server for biology · 2025Article
- Boltzmann's Theorem Revisited: Inaccurate Time-to-Action Clocks in Affective Disorders.Current neuropharmacology · 2024Review
- Looking Back to Move Forward: Research in Stress, Behavior, and Immune Function.Neuroimmunomodulation · 2024Review
- Glucocorticoid regulation of diurnal spine plasticity in the murine ventromedial prefrontal cortex.Journal of neuroendocrinology · 2022Article
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The ventromedial prefrontal cortex (vmPFC) regulates fear acquisition, fear extinction, mood, and HPA axis function. Multiple brain regions exhibit time-of-day dependent variations in learning, long term potentiation (LTP), and dendritic morphology. Glucocorticoids have been implicated in the regulation of dendritic structure in the context of stress. Glucocorticoids are also known to regulate molecular clock entrainment via upregulation of Per1 transcription. In the present study, C57BL/6 N mice were sacrificed at three distinct times of day (ZT3, ZT12, and ZT16, lights off at ZT12) and Per1 mRNA expression was measured in the infralimbic and prelimbic vmPFC subregions using droplet digital (dd) PCR after recovering from adrenalectomy or sham surgery for 10 days. Sham mice showed Per1 rhythmicity in both infralimbic (IL) and prelimbic (PL) cortex, with peak expression occurring at ZT12. Adrenalectomized mice showed reductions in Per1 amplitude at ZT12 in both IL and PL, suggesting that the vmPFC molecular clock is entrained by diurnal glucocorticoid oscillations. Thy1-eGFP mice were used to visualize and quantify dendritic spine density on deep layer pyramidal dendrites at ZT 3, 12, and 16. Spine density in both PL and IL exhibited changes between the light (inactive) and dark (active) phases, with peak spine density observed at ZT16 and trough spine density observed at ZT3. These changes in spine density were restricted to changes in long thin and stubby type spines. To determine if changes in spine density is regulated by glucocorticoid oscillations, the 11β-hydroxylase inhibitor metyrapone was administered 2 h prior to the onset of the active phase (ZT10) daily for 7 days. Metyrapone administration blocked both the diurnal peak of plasma corticosterone and peak spine densities in the IL and PL at ZT16. These results suggest that vmPFC molecular clock gene and dendritic spine diurnal rhythms depend on intact diurnal glucocorticoid oscillations.
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