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The cholesterol-lowering property of soybeans fed to rats is related to the fasting duration

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Abstract

Numerous factors affect plasma cholesterol and, therefore, representpotential interferences with the specific effects of diet on lipid metabolism.After casein intake, serum cholesterol levels depend on many experimentalconditions in rats, such as the type of casein, the presence or absence ofcholesterol in the diet, the age and strain of rat, the diet composition, thenutritional status. The effect of fasting duration on selected parameters wasstudied in adult male Wistar rats fed a 20% casein and 1% cholesterol-based diet. No changes were observed in total serum, lipoproteins-B andHDL cholesterol and in triglyceride values after an 8 h-fast compared tonon-fasted animals. A significant decrease was induced in total andlipoproteins-B cholesterol with a 12 h-fast. A prolonged fast resulted ina significant decrease in these parameters and in triglycerides and inHDL-cholesterol levels.Fasted animals fed heated soybean meal instead of casein did not display amarked decrease in serum lipids. It appeared that the fasting effect wasmore marked in animals fed casein than in animals fed soybeans. Theseresults showed the importance of experimental conditions such as nutritional status ofanimals when blood samples are taken in studies of the hypocholesterolemiceffect of soy protein compared to casein.

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Authors and Affiliations

  1. INSERM Unité 308, 38 rue Lionnois, 54 000, Nancy, France

    Lydie Guermani-Nicolle, Christian Villaume, Hwei-Ming Bau, Annie Schwertz, Jean-Pierre Nicolas & Luc Mejean

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  1. Lydie Guermani-Nicolle
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  2. Christian Villaume
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  3. Hwei-Ming Bau
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  4. Annie Schwertz
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  5. Jean-Pierre Nicolas
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  6. Luc Mejean
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Guermani-Nicolle, L., Villaume, C., Bau, HM. et al. The cholesterol-lowering property of soybeans fed to rats is related to the fasting duration. Plant Foods Hum Nutr 56, 239–249 (2001). https://doi.org/10.1023/A:1011144031646

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