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Response of hepatic lipid and glucose metabolism to a mixture or single fatty acids: Possible presence of fatty acid-sensing mechanisms.
MedLine Citation:
PMID:  23010243     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
To assess the hypothesis that an acute dietary fatty acid (FA) supply may improve glucose tolerance in rainbow trout, we orally administered fish with fish oil (FO; 10mL.kg(-1), one time), which were then subjected to a glucose tolerance test and sampled 6h after injection. Parameters related to glucose and lipid metabolism were then assessed. The results suggest that when both nutrients were administered at the same time, an increased potential for lipogenesis occurred concomitantly with a lower level of glycemia. In a second experiment we administered intraperitoneally a single FA present in the FO mixture such as oleic acid (60 or 300μg.kg(-1)) whereas octanoic acid (60 or 300μg.kg(-1)) was used as negative control (absent from the FO). However, the effects of both FA were similar in reducing the potential of lipid synthesis and oxidation, and in enhancing the potential of glucose synthesis and glycogenesis. Differences found between FO and single FA administration show that response to FA was dependent on the treatment (mixture vs. single FA) but also comply with the idea that an interaction between FA and glucose rather than FA alone are in the origin of the results reported. The administration of individual FA such as oleic and octanoic acid failed in enhancing lipogenesis and reducing plasma glucose levels and thus in explaining results obtained with FO. However, results provide evidence that FA even provided at a low dose play a key role in the regulation of several putative components of a FA sensing system present in rainbow trout liver.
Authors:
Marta Librán-Pérez; A Cláudia Figueiredo-Silva; Stephane Panserat; Inge Geurden; Jesús M Míguez; Sergio Polakof; José L Soengas
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-22
Journal Detail:
Title:  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology     Volume:  -     ISSN:  1531-4332     ISO Abbreviation:  Comp. Biochem. Physiol., Part A Mol. Integr. Physiol.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806096     Medline TA:  Comp Biochem Physiol A Mol Integr Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Inc.
Affiliation:
Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, E-36310 Vigo, Spain.
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