Fatty acid composition of liver, adipose tissue, spleen, and heart of mice fed diets containing t10, c12-, and c9, t11-conjugated linoleic acid.
Conjugated linoleic acid (CLA) isomers have unique effects on tissue lipids. Here we investigated the influence of individual CLA isomers on the lipid weight and fatty acid composition of lipid metabolizing (i.e. liver and retroperitoneal adipose) and lipid sensitive (i.e. spleen and heart) tissues. Female mice (8 week old; n=6/group) were fed either a control or one of the two CLA isomer supplemented (0.5%) diets for 8 weeks. The cis-9, trans-11-CLA diet reduced the 18:1n-9 wt% by 20-50% in liver, adipose tissue, and spleen, reduced the spleen n-3 polyunsaturated fatty acid (PUFA) by 90%, and increased the n-6 PUFA wt% by 20-50% in all tissues except heart. The trans-10, cis-12-CLA reduced both the n-6 and n-3 PUFA wt% in liver (>50%), reduced the heart n-3 PUFA wt% by 25%, and increased the wt% of spleen n-3 PUFA by 700%. The functional consequences of such changes in tissue fatty acid composition need to be investigated.
Kelley
Darshan S
DS
Western Human Nutrition Research Center, ARS, USDA, and Department of Nutrition, University of California, One Shields Avenue, Davis, CA 95616, USA. dkelley@whnrc.usda.gov
Bartolini
Giovanni L
GL
Newman
John W
JW
Vemuri
Madhuri
M
Mackey
Bruce E
BE
D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D004032:Diet; D004041:Dietary Fats / Q000008:administration & dosage* / Q000493:pharmacokinetics; D005227:Fatty Acids / Q000032:analysis* / Q000097:blood; D005260:Female; D044243:Linoleic Acids, Conjugated / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D008099:Liver / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D009206:Myocardium / Q000378:metabolism; D013154:Spleen / Q000378:metabolism; D014018:Tissue Distribution
D004041:Dietary Fats; D005227:Fatty Acids; D044243:Linoleic Acids, Conjugated