Document Detail


Energy expenditure of rats subjected to long-term food restriction.
MedLine Citation:
PMID:  11303467     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Food restriction, even when expressed per unit of metabolic mass, leads to energy conservation as seen by decreased oxygen consumption. The objective of the present study was to verify whether the energy conservation mechanism reduces energy expenditure for as long as food restriction lasts or whether a return to basal level may occur without realimentation, mainly in mildly food-restricted rats. Wistar rats were brought to the laboratory on weaning. They were then assigned to control group that received ad libitum food intake, R10 and R20 groups that received 90 and 80%, respectively, of the food eaten by control group and RM group that received an amount of food enough only to keep body weight. The food restriction period lasted for 3 months and was followed by another month during which all groups received ad libitum food intake. The results showed that even in animals subjected to mild food restriction (10%) there was a sustained decrease in oxygen consumption that lasted until refeeding of the animals. The results led to the conclusion that the energy conservation mechanism is active from little food restriction until more stronger levels of restriction, in a proportional manner, and the decreased energy expenditure is maintained during the whole food restriction period.
Authors:
F N Santos-Pinto; J Luz; M A Griggio
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of food sciences and nutrition     Volume:  52     ISSN:  0963-7486     ISO Abbreviation:  Int J Food Sci Nutr     Publication Date:  2001 Mar 
Date Detail:
Created Date:  2001-04-16     Completed Date:  2001-04-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9432922     Medline TA:  Int J Food Sci Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  193-200     Citation Subset:  IM    
Affiliation:
Disciplina de Fisiologia Renal e Termometabologia, Departamento de Fisiologia, Universidade Federal de São Paulo, Rua Botucatu, 862, 5o andar, 04023-900 So Paulo, SP, Brazil.
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Animals
Body Weight
Energy Metabolism / physiology*
Food Deprivation / physiology*
Male
Oxygen Consumption / physiology
Rats
Rats, Wistar

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