Central and peripheral regulation of feeding and nutrition by the mammalian circadian clock: implications for nutrition during manned space flight.

TitleCentral and peripheral regulation of feeding and nutrition by the mammalian circadian clock: implications for nutrition during manned space flight.
Publication TypeJournal Article
Year of Publication2002
JournalNutrition (Burbank, Los Angeles County, Calif.)
Volume18
Issue10
Pagination814-9
ISSN0899-9007
Abstract

Circadian clocks have evolved to predict and coordinate physiologic processes with the rhythmic environment on Earth. Space studies in non-human primates and humans have suggested that this clock persists in its rhythmicity in space but that its function is altered significantly in long-term space flight. Under normal circumstances, the clock is synchronized by the light-dark cycle via the retinohypothalamic tract and the suprachiasmatic nucleus. It is also entrained by restricted feeding regimes via a suprachiasmatic nucleus-independent circadian oscillator. The site of this suboscillator (or oscillators) is not known, but new evidence has suggested that peripheral tissues in the liver and viscera may express circadian clock function when forced to do so by restricted feeding schedules or other homeostatic disruptions. New research on the role of the circadian clock in the control of feeding on Earth and in space is warranted.

URLhttp://linkinghub.elsevier.com/retrieve/pii/S0899900702009371
Short TitleNutrition
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