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© 2006 American Society for Nutrition J. Nutr. 136:1256-1260, May 2006


Nutrient Physiology, Metabolism, and Nutrient-Nutrient Interactions

A High-Protein, High-Fat, Carbohydrate-Free Diet Reduces Energy Intake, Hepatic Lipogenesis, and Adiposity in Rats

Lisa Pichon, Jean-François Huneau, Gilles Fromentin1 and Daniel Tomé

UMR INRA 914 Physiologie de la Nutrition et du Comportement Alimentaire, Institut National Agronomique Paris-Grignon, F75231 PARIS Cedex 05, France

1 To whom correspondence should be addressed. E-mail: fromenti{at}inapg.fr.

The aim of this work was to determine the effects in rats of ingesting 1 of 3 diets with normal or high protein concentrations and various carbohydrate:lipid ratios on weight gain, body composition, and the development and metabolism of white adipose tissue (WAT). For this purpose, male Wistar rats were fed for 20 or 42 d a high-carbohydrate, low-fat, normal-protein diet (76, 10, and 14% of energy as carbohydrate, lipid, and protein, respectively, carbohydrate:lipid ratio (C/L) = 7.6), a normal-carbohydrate, low-fat, high-protein diet (35, 10, and 55% of energy as carbohydrate, lipid, and protein respectively, C:L = 3.5), or a carbohydrate-free, high-fat, high-protein diet (45 and 55% of energy as fat and protein, respectively, C:L = 0). Growth, food intake, body composition, WAT cellularity, and several markers of lipogenesis including fatty acid synthase and lipoprotein lipase activities were measured in adipose tissue and liver. Lowering the C:L ratio reduced the development of WAT, weight gain, body fat mass, and adipocyte size, and in rats fed the carbohydrate-free diet (C:L = 0), the total number of adipocytes in subcutaneous WAT. These reductions in adipose tissue development with decreases in the C:L ratio of the diet seemed to be due primarily to reduced hepatic lipogenesis.


KEY WORDS: • adipocytes • body composition • fatty acid synthase • lipoprotein lipase • carbohydrate-free diet




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D. Azzout-Marniche, C. Gaudichon, C. Blouet, C. Bos, V. Mathe, J.-F. Huneau, and D. Tome
Liver glyconeogenesis: a pathway to cope with postprandial amino acid excess in high-protein fed rats?
Am J Physiol Regulatory Integrative Comp Physiol, April 1, 2007; 292(4): R1400 - R1407.
[Abstract] [Full Text] [PDF]




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