| α-Linolenate reduces the dietary requirement for linoleate in the growing rat. | |
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MedLine Citation:
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PMID: 21880475 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background: We hypothesized that due to the absence of a dietary source of omega-3 fatty acids, the essential fatty acid (EFA) deficiency model leads to an overestimate of linoleic acid (LA) requirements. Methods: over 7wk, young rats consumed an EFA diet containing either 0en% linoleate (0LA) and 0en% α-linolenate (0LNA) or a diet containing 0.5en% LNA plus one of seven levels of added LA (0.12-4.0en%; n=6/group). Results: Rats consuming the 0LA-0LNA diet had the lowest final body weight, 34-68% lower LA and arachidonate in plasma and liver, 87% lower LA in epididymal fat, and an 8-20 fold higher eicosatrienoate in plasma, liver and muscle lipids. 0.5LNA completely prevented the lower growth and partly prevented the rise in eicosatrienoate seen in the 0LA-0LNA group. Conclusion: Providing dietary LNA at 0.5 en% reduces the rat's physiological requirement for LA by an estimated factor of at least four (0.5en% instead of 2en%). Since LA requirements in humans are also based on the same flawed model of EFA deficiency, it is plausible that they too have been overestimated and should therefore be reinvestigated. |
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Authors:
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P Guesnet; S-M Lallemand; J-M Alessandri; M Jouin; S C Cunnane |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-29 |
Journal Detail:
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Title: Prostaglandins, leukotrienes, and essential fatty acids Volume: - ISSN: 1532-2823 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-9-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8802730 Medline TA: Prostaglandins Leukot Essent Fatty Acids Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier Ltd. |
Affiliation:
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INRA, UR 909 Nutrition et Régulation Lipidique des Fonctions Cérébrales, F-78352 Jouy-en-Josas, France. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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