RGD Reference Report - Post-transcriptional effects and interactions between chronic mild stress and acute sleep deprivation: regulation of translation factor and cytoplasmic polyadenylation element-binding protein phosphorylation. - Rat Genome Database

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Post-transcriptional effects and interactions between chronic mild stress and acute sleep deprivation: regulation of translation factor and cytoplasmic polyadenylation element-binding protein phosphorylation.

Authors: Gronli, J  Dagestad, G  Milde, AM  Murison, R  Bramham, CR 
Citation: Gronli J, etal., Behav Brain Res. 2012 Dec 1;235(2):251-62. doi: 10.1016/j.bbr.2012.08.008. Epub 2012 Aug 16.
RGD ID: 10401259
Pubmed: PMID:22917528   (View Abstract at PubMed)
DOI: DOI:10.1016/j.bbr.2012.08.008   (Journal Full-text)

Stress and restricted or disrupted sleep trigger adaptive responses in the brain at the level of gene transcription. We investigated the possible impact of chronic mild stress (CMS), acute sleep deprivation, and a combination of these in male rats on post-transcriptional mechanisms important for cognitive function and synaptic plasticity. Relationships between sleep architecture and translational regulators were also assessed. After four weeks of CMS, phosphorylation of two key translation factors, eukaryotic initiation factor 4E (eIF4E) and elongation factor 2 (eEF2), was enhanced in the prefrontal cortex, but unchanged in the hippocampus and dentate gyrus. Sleep deprivation decreased phosphorylated eIF4E in the dentate gyrus. In contrast, eEF2 phosphorylation was elevated in all brain regions after sleep deprivation. Thus, CMS and sleep deprivation, when given alone, have distinct region-specific effects. Furthermore, the combined treatment revealed striking interactions with eEF2 phosphorylation in which sleep deprivation counteracts the effect of CMS cortically and CMS modulates the effects of sleep deprivation in the hippocampus proper. Although CMS exposure alone had no effect in the hippocampus, it inhibited the sleep deprivation-induced eIF4E phosphorylation, while inducing phosphorylation of a major regulatory RNA-binding protein, cytoplasmic polyadenylation element-binding protein (CPEB) in the combined treatment. CMS had no effect on plasma corticosterone, but led to disruption of sleep. Sleep quality and sleep quantity in non-stressed animals showed predictive changes in eIF4E and eEF2 phosphorylation cortically. Prior exposure to CMS abolishes this relationship. We conclude that CMS and acute sleep deprivation have interactive and brain region-specific effects on translational regulators of relevance to mechanisms of stress responsiveness and sleep homeostasis.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
Sleep Deprivation  ISOEef2 (Rattus norvegicus)10401259; 10401259protein:hyperphosphorylation:prefrontal cortex and dentate gyrusRGD 
Sleep Deprivation  IEP 10401259protein:hyperphosphorylation:prefrontal cortex and dentate gyrusRGD 

Objects Annotated

Genes (Rattus norvegicus)
Eef2  (eukaryotic translation elongation factor 2)

Genes (Mus musculus)
Eef2  (eukaryotic translation elongation factor 2)

Genes (Homo sapiens)
EEF2  (eukaryotic translation elongation factor 2)


Additional Information