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- W2894286332 endingPage "70" @default.
- W2894286332 startingPage "47" @default.
- W2894286332 abstract "Abstract The mammalian circadian clock in the suprachiasmatic nucleus ( SCN ) is very robust, able to coordinate our daily physiological and behavioral rhythms with exquisite accuracy. Simultaneously, the SCN clock is highly sensitive to environmental timing cues such as the solar cycle. This duality of resiliency and sensitivity may be sustained in part by a complex intertwining of three cellular oscillators: transcription/translation, metabolic/redox, and membrane excitability. We suggest here that one of the links connecting these oscillators may be forged from copper (Cu). Cellular Cu levels are highly regulated in the brain and peripherally, and Cu affects cellular metabolism, redox state, cell signaling, and transcription. We have shown that both Cu chelation and application induce nighttime phase shifts of the SCN clock in vitro and that these treatments affect glutamate, N ‐methyl‐D‐aspartate receptor, and associated signaling processes differently. More recently we found that Cu induces mitogen‐activated protein kinase‐dependent phase shifts, while the mechanisms by which Cu removal induces phase shifts remain unclear. Lastly, we have found that two Cu transporters are expressed in the SCN , and that one of these transporters ( ATP 7A) exhibits a day/night rhythm. Our results suggest that Cu homeostasis is tightly regulated in the SCN , and that changes in Cu levels may serve as a time cue for the circadian clock. We discuss these findings in light of the existing literature and current models of multiple coupled circadian oscillators in the SCN ." @default.
- W2894286332 created "2018-10-05" @default.
- W2894286332 creator A5056966239 @default.
- W2894286332 creator A5058234589 @default.
- W2894286332 date "2018-12-03" @default.
- W2894286332 modified "2023-09-28" @default.
- W2894286332 title "Copper in the suprachiasmatic circadian clock: A possible link between multiple circadian oscillators" @default.
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