The effect of docosahexaenoic acid on t10, c12-conjugated linoleic acid-induced changes in fatty acid composition of mouse liver, adipose, and muscle.

Abstract:

BACKGROUND:Concomitant supplementation of 1.5% docosahexaenoic acid (22:6 n-3; DHA) with 0.5% t10, c12-conjugated linoleic acid (18:2 n-6; CLA) prevented the CLA-induced increase in expression of hepatic genes involved in fatty acid synthesis and the decrease in expression of genes involved in fatty acid oxidation. The effect of CLA on fatty acid compositions of adipose tissue and muscle and whether DHA can prevent those CLA-induced changes in fatty acid composition is not known. METHODS:We investigated if DHA fed concomitantly with CLA for 4 weeks will prevent the CLA-induced changes in fatty acid compositions of liver, adipose, and muscle lipids in C57BL/6N female mice. We also examined changes in expression of adipose tissue genes involved in fatty acid synthesis, oxidation, uptake, and lipolysis. RESULTS:CLA supplementation increased liver fat and decreased total n-3 polyunsaturated fat (PUFA) concentration. DHA not only prevented the CLA-induced changes in liver fat, but also increased n-3 PUFA by >350% as compared with the control group. CLA decreased adipose weight and the expression of genes involved in fatty acid synthesis, oxidation, and uptake and increased that of uncoupling protein 2 (UCP2). Supplementing DHA along with CLA increased adipose n-3 PUFA by >1000% compared with control group, but did not prevent the CLA-induced changes in mass or gene expression. Both CLA and DHA were incorporated into muscle lipids, but had minor effects on fatty acid composition. CONCLUSIONS:Liver, adipose tissue, and muscle responded differently to CLA and DHA supplementation. DHA prevented CLA-induced increase in liver fat but not loss of adipose mass.

authors

Fedor DM,Adkins Y,Newman JW,Mackey BE,Kelley DS

doi

10.1089/met.2012.0116

subject

Has Abstract

pub_date

2013-02-01 00:00:00

pages

63-70

issue

1

eissn

1540-4196

issn

1557-8518

journal_volume

11

pub_type

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