Document Detail

Conjugated docosahexaenoic acid inhibits lipid accumulation in rats.
MedLine Citation:
PMID:  16426831     Owner:  NLM     Status:  MEDLINE    
Conjugated linoleic acid (CLA), which contains a conjugated double-bond system, and n-3 highly unsaturated fatty acids such as docosahexaenoic acid (DHA) are widely known to improve lipid metabolism. To examine the possibility that a fatty acid with a combination of these structural features might have stronger physiological effects, we prepared conjugated DHA (CDHA) by alkaline isomerization of DHA and examined its effects on lipid and sugar metabolism in rats. Rats were force fed with 200 mg of test oils [linoleic acid (LA), DHA, CLA or CDHA] everyday for 4 weeks. Compared with the animals from the other groups, those in the CDHA group showed a significant weight loss in white adipose tissue (57% of adipose tissue weight in the LA group) and significant decreases in the levels of liver triacylglycerol (TG; 65% of TG level in the LA group) as well as total cholesterol (TC; 88% of TC level in the LA group), indicating suppression of lipid accumulation in the liver and adipose tissue. In addition, plasma TG and TC levels significantly decreased (69% of TG level and 82% of TC level in the LA group), indicating improved lipid metabolism. In the liver, the fatty acid synthesis system was inhibited and the fatty acid beta-oxidation system was activated, whereas the free fatty acid, glucose and tumor necrosis factor alpha levels in the plasma were lowered following CDHA administration. Hence, intake of CDHA appears to suppress the accumulation of fat in the liver and epididymal adipose tissue and improves lipid and sugar metabolism in rats.
Tsuyoshi Tsuzuki; Yuki Kawakami; Kiyotaka Nakagawa; Teruo Miyazawa
Publication Detail:
Type:  Journal Article     Date:  2005-10-25
Journal Detail:
Title:  The Journal of nutritional biochemistry     Volume:  17     ISSN:  0955-2863     ISO Abbreviation:  J. Nutr. Biochem.     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-07-24     Completed Date:  2006-09-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9010081     Medline TA:  J Nutr Biochem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  518-24     Citation Subset:  IM    
Department of Food Management, School of Food, Agricultural and Environment Sciences, Miyagi University, Sendai 982-0215, Japan.
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MeSH Terms
Adipose Tissue / drug effects,  metabolism
Blood Glucose / analysis
Cholesterol / analysis,  blood
Docosahexaenoic Acids / chemistry,  pharmacology*
Fatty Acids / administration & dosage
Fatty Acids, Nonesterified / blood,  metabolism
Hydrogen-Ion Concentration
Insulin / blood
Leptin / blood
Linoleic Acid / administration & dosage
Linoleic Acids, Conjugated / administration & dosage
Lipid Metabolism / drug effects*
Liver / chemistry
Organ Size / drug effects
Phospholipids / analysis,  blood
Rats, Sprague-Dawley
Safflower Oil / chemistry
Triglycerides / analysis,  blood,  metabolism
Tumor Necrosis Factor-alpha / analysis
Weight Loss
Reg. No./Substance:
0/Blood Glucose; 0/Fatty Acids; 0/Fatty Acids, Nonesterified; 0/Leptin; 0/Linoleic Acids, Conjugated; 0/Phospholipids; 0/Triglycerides; 0/Tumor Necrosis Factor-alpha; 11061-68-0/Insulin; 2197-37-7/Linoleic Acid; 25167-62-8/Docosahexaenoic Acids; 57-88-5/Cholesterol; 8001-23-8/Safflower Oil

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