Document Detail


Effects of early weaning on the circadian rhythm and behavioral satiety sequence in rats.
MedLine Citation:
PMID:  20974233     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
The objective of this work was to study the effect of early weaning on circadian rhythm and the behavioral satiety sequence in adult rats. Male Wistar rat pups were weaned for separation from the mother at 15 (D15), 21 (D21) and 30 (D30) days old. Body weight and food intake was measured every 30 days until pups were 150 days old. At 90 days of age, the circadian rhythm of food intake was evaluated every 4h for three days. Behavioral satiety was evaluated at 35 and 100 days of age. This work demonstrated that body weight and food intake were not altered, but the behavioral satiety sequence demonstrated that the D15 group delayed satiety compared with the D30 group at 100 days of age. In the circadian rhythm of the food intake study, early weaning (D15) changed food intake in the intermediary period of the light phase and in the intermediary period of the dark phase. In conclusion, our study showed that early weaning may alter the feeding behavior mainly in relation to satiety and the circadian rhythm of feeding. It is possible that the presence of other environmental stimuli during early weaning can cause hyperphagia and deregulate the mechanisms of homeostasis and body weight control. This study supports theories that depict insults during early life as determinants of chronic diseases.
Authors:
Lisiane dos Santos Oliveira; Ligia Pereira da Silva; Aline Isabel da Silva; Carolina Peixoto Magalhães; Sandra Lopes de Souza; Raul Manhães de Castro
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Publication Detail:
Type:  Journal Article     Date:  2010-10-23
Journal Detail:
Title:  Behavioural processes     Volume:  86     ISSN:  1872-8308     ISO Abbreviation:  Behav. Processes     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  119-24     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Affiliation:
Centro Acadêmico de Vitória - Universidade Federal de Pernambuco, Vitória de Santo Antão - PE, Brazil. lisianenutricao@yahoo.com.br
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