Document Detail

Interaction of dietary protein, cholesterol and age on lipid metabolism of the rat.
MedLine Citation:
PMID:  2758009     Owner:  NLM     Status:  MEDLINE    
1. Male rats at 1 (young) and 9 months (adult) of age were fed on purified diets, supplemented with or without cholesterol, containing 200 g protein/kg (casein (CAS), whey protein (WHY) or soya-bean protein (SOY] for 4 weeks. 2. SOY exerted a hypocholesterolaemic effect in young rats regardless of dietary cholesterol, whereas in adult rats it was observed only when a cholesterol-enriched diet was given. WHY was also hypocholesterolaemic in rats of both ages given cholesterol. SOY tended to reduce the liver cholesterol both in young and adult rats. 3. The liver hydroxymethylglutaryl-CoA reductase (NADPH) (EC activity tended to be lower in the vegetable-protein groups than in the animal-protein groups in young rats, but the age-related reduction was observed only in the latter groups. 4. There was no significant age-related difference in the activity of liver cholesterol 7 alpha-monooxygenase (EC in response to diets. However, when cholesterol was given, activity tended to decrease with age. Rats given SOY excreted more faecal steroids than those given casein, particularly adult rats. 5. The fatty acid profile of phosphatidylcholine and the delta 6-desaturase activity of liver microsomes indicated the reduced desaturation of linoleate in the SOY and WHY groups compared with the CAS groups. 6. The results thus showed a complex interaction of protein type, cholesterol and age on cholesterol homeostasis.
Y S Choi; S Goto; I Ikeda; M Sugano
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The British journal of nutrition     Volume:  61     ISSN:  0007-1145     ISO Abbreviation:  Br. J. Nutr.     Publication Date:  1989 May 
Date Detail:
Created Date:  1989-09-21     Completed Date:  1989-09-21     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0372547     Medline TA:  Br J Nutr     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  531-43     Citation Subset:  IM    
Laboratory of Nutrition Chemistry, Kyushu University School of Agriculture, Fukuoka, Japan.
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MeSH Terms
Aging / metabolism*
Cholesterol / blood,  pharmacology*
Cholesterol 7-alpha-Hydroxylase / metabolism
Dietary Proteins / pharmacology*
Feces / analysis
Hydroxymethylglutaryl CoA Reductases / metabolism
Lipids / blood*
Liver / metabolism
Microsomes, Liver / enzymology
Phosphatidylcholines / metabolism
Rats, Inbred Strains
Reg. No./Substance:
0/Dietary Proteins; 0/Lipids; 0/Phosphatidylcholines; 57-88-5/Cholesterol; EC 1.1.1.-/Hydroxymethylglutaryl CoA Reductases; EC 7-alpha-Hydroxylase

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