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Updated: Jan 6, 2026

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
Published on: November 11, 2016
The forebrain synaptic transcriptome is organized by clocks but its proteome is driven by sleep
Sara B Noya1, David Colameo1, Franziska Brüning2,3
1Institute of Pharmacology and Toxicology, University of Zürich, Zurich, Switzerland.
Synaptic RNA transcripts in the brain exhibit daily rhythms, anticipating dawn and dusk. Sleep deprivation disrupts protein rhythms but not RNA, suggesting circadian control over synaptic needs.
Area of Science:
- Neuroscience
- Molecular Biology
- Chronobiology
Background:
- Neurons transport RNA and proteins to dendrites and axons.
- Understanding daily rhythms in neuronal communication is crucial.
Purpose of the Study:
- To investigate daily rhythms of synaptic transcripts and proteins in the forebrain.
- To determine the impact of sleep deprivation on these rhythms.
Main Methods:
- Biochemical analysis of forebrain synaptic RNA and protein.
- Time-of-day sampling and assessment of oscillations.
- Evaluation of sleep deprivation effects.
Main Results:
- Two-thirds of synaptic transcripts show daily rhythms, independent of somatic oscillations.
- Transcripts cluster temporally, linked to metabolism/translation (dawn) and synaptic transmission (dusk).
- Synaptic proteome rhythms are abolished by sleep deprivation, while transcript rhythms persist.
Conclusions:
- The brain anticipates daily RNA needs at the synapse.
- Translation is regulated by sleep-wake cycles.
- Circadian rhythms play a key role in synaptic function and energy homeostasis.
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