Journal of Nutritional Science and Vitaminology
Online ISSN : 1881-7742
Print ISSN : 0301-4800
Hypocholesterolemic Effect of Indigestible Fraction of Chlorella regularis in Cholesterol-Fed Rats
Shinya SHIBATAKuniaki ODANorie ONODERA-MASUOKASatoshi MATSUBARAHiroko KIKUCHI-HAYAKAWAFumiyasu ISHIKAWAAkira IWABUCHIHiroshi SANSAWA
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Volume 47 (2001) Issue 6 Pages 373-377

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Abstract

The effects of Chlorella regularis powder (CP) and Chlorella regularis indigestible fraction (CIF) on serum and liver lipid concentrations and on fecal steroid excretion were es-timated in rats fed diets containing 5 g/kg cholesterol and 2.5 g/kg sodium cholate. The in-gestion of 12.7% CP or 5.3% CIF did not influence food intake or growth. CP and CIF de-creased the levels of serum cholesterol, but had no effect on the levels of serum triacylglyc-erol and phospholipid. Liver cholesterol contents were lower in the CP and CIF groups than in the control group, but CP and CIF did not affect liver triacylglycerol content. CP and CIF increased the total amount of fecal neutral steroids excreted, but did not modify the total bile acid excretion. However, the soluble bile acid concentrations of reconstituted fecal water in the rats fed CP and CIF diets were lower than the control value. Moreover, CP and CIF had a high bile acid binding capacity in vitro. These results indicated that CIF had a hypocholes-terolemic effect and enhanced fecal neutral steroid excretion while decreasing the soluble fecal bile acid concentration.

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