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• W139000511 abstract "Event Abstract Back to Event A “feeding time” for the brain Etienne Challet1* 1 University of Strasbourg, CNRS, France Daily rhythmicity in behavior and physiology is controlled by an endogenous circadian timing system, organized in a network of oscillatory structures. At the top of this circadian multi-oscillatory network, there is a master clock located in the suprachiasmatic nuclei of the hypothalamus. The molecular clockwork involves various clock genes, such as Period (Per). Light is the most potent synchronizer of the suprachiasmatic clock while meal timing, as modulated by temporal restricted feeding, has much less synchronizing influence on it. By contrast, timed calorie restriction (i.e., when only a hypocaloric diet is given each day) is a synchronizer powerful enough to modify the suprachiasmatic clockwork as well as the phase-shifting effects of light. This feedback of metabolic cues to the main clock involves Per1 and Per2 genes.Several, but not all, brain regions outside the suprachiasmtic nuclei express clock genes. Most of them show features of circadian oscillators, including autonomous rhythmicity for a few days when isolated in vitro. The secondary brain clocks are thought to play a role in timing for specific physiological and behavioral tasks. Importantly, these brain clocks are differentially influenced by meal timing. Circadian oscillations can be either highly sensitive to feeding cues (i.e., their phase is shifted according to meal schedule) in some structures (e.g., hypothalamic ventromedial and paraventricular nuclei) or hardly affected by meal timing in others (e.g., basolateral amygdale or hippocampus). The cerebral clocks sensitive to feeding cues likely define a network of coupled food-entrainable oscillators within the brain. Taken together, these data indicate that feeding cues can markedly modulate the timing of brain functions. Conference: 41st European Brain and Behaviour Society Meeting, Rhodes Island, Greece, 13 Sep - 18 Sep, 2009. Presentation Type: Oral Presentation Topic: Symposia lectures Citation: Challet E (2009). A “feeding time” for the brain. Conference Abstract: 41st European Brain and Behaviour Society Meeting. doi: 10.3389/conf.neuro.08.2009.09.018 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 04 Jun 2009; Published Online: 04 Jun 2009. * Correspondence: Etienne Challet, University of Strasbourg, CNRS, Strasbourg, France, challet@neurochem.u-strasbg.fr Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Etienne Challet Google Etienne Challet Google Scholar Etienne Challet PubMed Etienne Challet Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page." @default.
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• W139000511 title "A “feeding time” for the brain" @default.
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