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- W2017389384 abstract "J. Neurochem. (2010) 112, 1489–1499. Abstract Under special restricted feeding conditions the mammalian circadian clock, contained in the hypothalamic suprachiasmatic nucleus (SCN), can be entrained by food. During food restriction, hungry animals are very motivated to obtain food. This motivational state could be a key component in altering the SCN timing by feeding. In order to comprehend how hedonic signals of food affect the SCN clock, we evaluated the effects of a daily palatable snack on the behavioural rhythm of mice fed ad libitum with regular food, and housed under constant darkness conditions. As light synchronization of the SCN is modulated by feeding/metabolic cues, the effects of a palatable meal coupled to a light pulse were tested on behavioural and molecular rhythms. A daily palatable snack entrained behavioural rhythms of mice in constant darkness conditions. Furthermore, palatable meal access at the activity onset reduced light-induced behavioural phase-delays and Period genes expression in the SCN. In addition, an increase in the dopamine content and Period genes expression in the forebrain of mice was observed, concomitant with a c-FOS activation in dopaminergic and orexinergic neurons, suggesting that the effects of a palatable snack on the SCN clock are mediated by the reward/arousal central systems. In conclusion, this study establishes an underlying sensitivity of the master circadian clock to changes in motivational states related to palatable food intake." @default.
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- W2017389384 date "2010-03-01" @default.
- W2017389384 modified "2023-10-14" @default.
- W2017389384 title "Food-reward signalling in the suprachiasmatic clock" @default.
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- W2017389384 doi "https://doi.org/10.1111/j.1471-4159.2010.06570.x" @default.
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