Document Detail


Specific inhibition of hepatic fatty acid synthesis exerted by dietary linoleate and linolenate in essential fatty acid adequate rats.
MedLine Citation:
PMID:  933724     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Dietary linoleate and linolenate were investigated for their ability to specifically inhibit liver and adipose tissue lipogenesis in meal-fed (access to food 900-1,200 hr), essential fatty acid (EFA) adequate rats. Supplementing a high carbohydrate diet containing 2.5% safflower oil with 3% palmitate 16:0, oleate 18:1, or linoleate 18:2 did not affect in vivo liver or adipose tissue fatty acid synthesis. However, 18:2 addition to the basal diet did result in a significant (P less than 0.05) decline of liver fatty acid synthetase (FAS) and glucose-6-phosphate dehydrogenase (G6PD) activities. When the safflower oil content of the basal diet was reduced to 1%, the addition of 3% 18:2 or linolenate 18:3 significantly (P less than 0.05) depressed hepatic FAS, G6PD, and in vivo fatty acid synthesis by 50%. Addition of 18:1 caused no depression in hepatic FAS activity but did result in a significant (P less than 0.05) decline in liver G6PD activity and fatty acid synthesis which was intermediate between basal and basal +18:2- or +18:3-fed animals. Adipose tissue rates of lipogenesis were completely unaffected by dietary fatty acid supplementation. Similarly, the addition of 3 or 5% 18:3 to a basal diet for only one meal resulted in no change in lipogenesis relative to that in animals fed the basal diet. The data indicate that, like rats fed EFA-deficient diets, dietary 18:2 and 18:3 exert a specific capacity to depress rat liver FAS and G6PD activities and rate of fatty acid synthesis.
Authors:
S D Clarke; D R Romsos; G A Leveille
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Lipids     Volume:  11     ISSN:  0024-4201     ISO Abbreviation:  Lipids     Publication Date:  1976 Jun 
Date Detail:
Created Date:  1976-09-01     Completed Date:  1976-09-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0060450     Medline TA:  Lipids     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  485-90     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue / metabolism
Animals
Dietary Fats
Fatty Acid Synthetase Complex / metabolism
Fatty Acids / biosynthesis*
Glucosephosphate Dehydrogenase / metabolism
Linoleic Acids / pharmacology*
Linolenic Acids / pharmacology*
Liver / metabolism*
Malate Dehydrogenase / metabolism
Male
Rats
Chemical
Reg. No./Substance:
0/Dietary Fats; 0/Fatty Acids; 0/Linoleic Acids; 0/Linolenic Acids; EC 1.1.1.37/Malate Dehydrogenase; EC 1.1.1.49/Glucosephosphate Dehydrogenase; EC 6.-/Fatty Acid Synthetase Complex

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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