How Protein Affects Food Intake in Mice
Author Information
Author(s): Pillot Bruno, Duraffourd Céline, Bégeot Martine, Joly Aurélie, Luquet Serge, Houberdon Isabelle, Naville Danielle, Vigier Michèle, Gautier-Stein Amandine, Magnan Christophe, Mithieux Gilles
Primary Institution: Institut National de la Santé et de la Recherche Médicale, U855, Lyon, France
Hypothesis
Does the hypothalamic melanocortin system mediate the hunger-curbing effects of protein-enriched diets in mice?
Conclusion
The hypothalamic melanocortin system does not mediate the hunger-curbing effects induced by changes in the macronutrient composition of food.
Supporting Evidence
- Mice fed a protein-enriched diet showed a 20% decrease in food intake compared to those on a starch-enriched diet.
- Changes in gene expression related to hunger were observed in the hypothalamus of mice on a protein diet.
- Protein-induced hypophagia was not mediated by increased activity of the melanocortin system.
Takeaway
When mice eat more protein, they feel less hungry and eat less food, but this doesn't happen because of a specific brain system that usually controls hunger.
Methodology
Mice were divided into groups and fed either a starch-enriched diet or a protein-enriched diet, with food intake and body weight continuously recorded.
Potential Biases
Potential bias in the selection of mouse strains and the specific dietary compositions used.
Limitations
The study primarily focused on male mice, which may limit the generalizability of the findings to females.
Participant Demographics
Male mice of two strains: C57Bl/6 and 129Sv.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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