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Dietary fibers reduce food intake by satiation without conditioned taste aversion in mice.
MedLine Citation:
PMID:  23268328     Owner:  NLM     Status:  Publisher    
It is well known that intake of dietary fibre (DF) potently decreases food intake and feelings of hunger and/or promotes satiety ratings. However, the mechanisms explaining these effects are not well characterized. This work was performed to determine which of satiation and/or satiety mechanisms provoke the decrease of food intake induced by DF in mice. We tested in an intra-group protocol a low-viscosity (LV, fructo-oligosaccharide), a viscous (VP, guar gum) and a high-viscosity preload (HV, mixture of guar gum and fructo-oligosaccharide) preload. These were given to mice by intra-gastric gavage. It appeared that viscous preloads such as VP and HV reduced the daily energy intake by 14% and 21% respectively. The strong effect of HV was mainly due to a large decrease of meal size (by 57 %) and meal duration (by 65%) with no effect on ingestion rate during the first 30 min after administration. Therefore, the DF- induced decrease of energy intake was due to a satiation mechanism. This is further supported by a 3-fold increased sensitization of neurons in the nucleus of the solitary tract as observed by c-Fos protein immunolabelling. No compensation of food intake was observed during the rest of the day, a phenomenon that may be explained by the fact that metabolic rate remained high despite the lower food intake. We have also shown that the DF-induced inhibition of food intake was not paired with a conditioned taste aversion. To conclude, this work demonstrates that DF inhibits food intake by increasing satiation during ~1 hour after administration.
Rojo Rasoamanana; Patrick C Even; Nicolas Darcel; Daniel Tomé; Gilles Fromentin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-22
Journal Detail:
Title:  Physiology & behavior     Volume:  -     ISSN:  1873-507X     ISO Abbreviation:  Physiol. Behav.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Inc.
AgroParisTech, CRNH-IdF, UMR 914 Nutrition Physiology and Ingestive Behavior, F-75005 Paris, France; INRA, CRNH-IdF, UMR 914 Nutrition Physiology and Ingestive Behavior, F-75005 Paris, France.
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