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Gene expression in human subcutaneous adipose tissue after CLA intervention

ABSTRACT: Iisomer-specific effects of conjugated linoleic (CLA) supplementation on gene expression with particular consideration of the PPAR 2 Pro12Ala SNP in human adipose tissue.

ORGANISM(S): Homo sapiens

PROVIDER: GSE16615 | GEO | 2009/09/01

SECONDARY ACCESSION(S): PRJNA116255

REPOSITORIES: GEO

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gene expression in human subcutaneous adipose tissue after CLA intervention

Project description:Iisomer-specific effects of conjugated linoleic (CLA) supplementation on gene expression with particular consideration of the PPAR 2 Pro12Ala SNP in human adipose tissue. Effect of CLA supplementation on genome wide gene expression in adipose tissue biopsies from 5 PPARg2 Ala12Ala and 5 PPARg2 Pro12Pro men were investigated. Subjects underwent four intervention periods (4wk) in a randomized double blind cross-over design receiving f either cis-9, trans-11 CLA, trans-10,cis-12 CLA, 1:1 mixture of both isomers or a reference oil preparation. After each intervention biopsies were taken and whole genome expression microarrays were applied.

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Gene expression in mouse 3T3-L1 adipocyte tissue culture treated with cis-9,trans-11 conjugated linoleic acid(c9t11 CLA)

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Project description:Conjugated linoleic acid (CLA), a class of fatty acids found in beef and dairy products, has been shown to inhibit tumorigenesis in a variety of cancer model systems. Based on previously well-documented anti-tumor activity of CLA in rodent models of breast cancer, a pilot study was initiated to examine the effect of dietary CLA in a well-established transgenic model of breast cancer. Western blots were performed for the detection of AKT, c-Src, ERK1/2, and Cdc24. CLA significantly increased tumor burden (p<0.1) independent of an increase in oncogenic signaling. Mammary gland whole mounts indicated a loss of mammary adipose and extensive epithelial expansion in CLA-treated animals. Microarray analysis indicated a significant reduction in cytoskeletal related genes with at least a two-fold decrease in five out of six CLA-fed animals compared to untreated controls. Reduction of Cdc42, a key regulator of cell adhesion and cytoskeletal arrangements, was confirmed at the protein level by western blot (p<0.01). These findings suggest that dietary CLA may advance the malignant phenotype by promoting a loss of cell polarity and adhesion in the mammary gland epithelium. This action may have serious clinical implications for a subset high-risk population and warrants further investigation.

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