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• W3184153857 abstract "Abstract The suprachiasmatic nucleus (SCN) is a master circadian pacemaker known to integrate light intensity and seasonal information with peripheral tissues to coordinate daily rhythms of physiology and behavior. However, the contribution of food information to the regulation of the SCN network remains controversial. Here, we identified the effect induced by time-restricted feeding (TRF) at dawn, but not at another time widow, inducing a robust and long-term shift in locomotor behavior and increased wakefulness. Comparing the oscillations of intracellular Ca 2+ signals in the SCN GABAergic neurons of freely moving mice, before and after TRF, revealed significant activation of these neurons in dawn-TRF mice. Moreover, RNA-seq profiling in the dawn TRF-induced behavioral changes identified altered expressed genes involved in regulating extracellular exosome, ion transporters, and ECM-receptor interaction, but not core clock genes. Furthermore, injection in the SCN of insulin-like growth factor (IGF2) inhibitor Chromeceptin, targeting the most upregulated gene in extracellular exosome, abolished the after effect induced by ZT0-4 TRF. Finally, GABAergic-neuron-specific disruption of the potassium-chloride cotransporter Kcc2 intensified the dawn TRF-induced after effect, indicating that Kcc2 encodes food intake derived signals that control SCN clock entrainment. Thus, our study functionally links SCN GABAergic neuron activity and central clock entrainment regulation to both hunger- and food-response-related behaviors in mice." @default.
• W3184153857 created "2021-08-02" @default.
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• W3184153857 date "2021-02-22" @default.
• W3184153857 modified "2023-10-18" @default.
• W3184153857 title "Time-restricted feeding near dawn entrains long-term behavioral changes through the suprachiasmatic nucleus" @default.
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• W3184153857 doi "https://doi.org/10.1101/2021.02.18.431900" @default.
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