Journal
CHRONOBIOLOGY INTERNATIONAL
Volume 26, Issue 7, Pages 1273-1289Publisher
TAYLOR & FRANCIS INC
DOI: 10.3109/07420520903404480
Keywords
Food entrainment; Circadian rhythm; Food-anticipatory activity; Food-entrainable oscillator; Humoral pathway
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Proreitoria de Pesquisa da Universidade Federal do Rio Grande do Norte (PROPESQ-UFRN)
- Fundacao de Amparo a Pesquisa do Estado do Rio Grande do Norte (FAPERN)
- Canadian government
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Food is critical for all animal species. Its temporal availability is a relevant signal for organizing behavioral and physiological parameters. When food is restricted to a few hours per day, rats, mice, and other mammals exhibit anticipatory activity before meal-time (food-anticipatory activity). There is considerable evidence suggesting that this anticipation is mediated by a food-entrainable oscillator (FEO) with circadian properties, but located outside the suprachiasmatic nucleus of the hypothalamus (the light-entrainable oscillator). However, the locus of the FEO as well as the mechanisms by which food entrainment occurs is unclear. In this review, we summarize data about the potential input pathways to the FEO and propose a model for understanding it as a network of interconnected brain structures entrained by fluctuation of different humoral signals. (Author correspondence: brenotercio@cb.ufrn.br).
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