Document Detail


Lower efficacy in the utilization of dietary ALA as compared to preformed EPA + DHA on long chain n-3 PUFA levels in rats.
MedLine Citation:
PMID:  20734237     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We made a comparative analysis of the uptake, tissue deposition and conversion of dietary alpha-linolenic acid (ALA) to its long chain metabolites eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) with preformed EPA + DHA. Diets containing linseed oil [with ALA at approximately 2.5 (4 g/kg diet), 5 (8 g/kg diet), 10 (16 g/kg diet), 25% (40 g/kg diet)] or fish oil [with EPA + DHA at approximately 1 (1.65 g/kg diet), 2.5 (4.12 g/kg diet), 5% (8.25 g/kg diet)] or groundnut oil without n-3 polyunsaturated fatty acids (n-3 PUFA) were fed to rats for 60 days. ALA and EPA + DHA in serum, liver, heart and brain increased with increments in the dietary ALA level. When preformed EPA + DHA were fed, the tissue EPA + DHA increased significantly compared to those given ALA. Normalized values from dietary n-3 PUFA to tissue EPA + DHA indicated that 100 mg of dietary ALA lead to accumulation of EPA + DHA at 2.04, 0.70, 1.91 and 1.64% of total fatty acids respectively in liver, heart, brain and serum. Similarly 100 mg of preformed dietary EPA + DHA resulted in 25.4, 23.8, 15.9 and 14.9% of total fatty acids in liver, heart, brain and serum respectively. To maintain a given level of EPA + DHA, the dietary ALA required is 12.5, 33.5, 8.3 and 9.1 times higher than the dietary EPA + DHA for liver, heart, brain and serum respectively. Hence the efficacy of precursor ALA is lower compared to preformed EPA + DHA in elevating serum and tissue long chain n-3 PUFA levels.
Authors:
Ramaprasad R Talahalli; Baskaran Vallikannan; Kari Sambaiah; Belur R Lokesh
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-08-24
Journal Detail:
Title:  Lipids     Volume:  45     ISSN:  1558-9307     ISO Abbreviation:  Lipids     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-02     Completed Date:  2010-12-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0060450     Medline TA:  Lipids     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  799-808     Citation Subset:  IM    
Affiliation:
Department of Lipid Science and Traditional Foods, Central Food Technological Research Institute, Mysore, 570 020, India.
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MeSH Terms
Descriptor/Qualifier:
Animals
Docosahexaenoic Acids / metabolism*
Eicosapentaenoic Acid / metabolism*
Fatty Acids, Omega-3 / metabolism
Male
Rats
Rats, Wistar
alpha-Linolenic Acid / metabolism*
Chemical
Reg. No./Substance:
0/Fatty Acids, Omega-3; 1553-41-9/Eicosapentaenoic Acid; 25167-62-8/Docosahexaenoic Acids; 463-40-1/alpha-Linolenic Acid

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