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- W2097402572 abstract "Human epidemiologic studies and animal model studies support a role for n-3 polyunsaturated fatty acids (n-3 PUFA) in prevention or inhibition of breast cancer. However, mechanisms for this protection remain unclear. Syndecan-1 is a heparan sulfate proteoglycan, expressed on the surface of mammary epithelial cells and known to regulate many biological processes, including cytoskeletal organization, growth factor signaling, and cell-cell adhesion. We studied effects of n-3 PUFA on syndecan-1 expression in human mammary cell lines. PUFA were delivered to cells by low-density lipoproteins (LDL) isolated from the plasma of monkeys fed diets enriched in fish oil (n-3 PUFA) or linoleic acid (n-6 PUFA). Proteoglycan synthesis was measured by incorporation of [35S]-sodium sulfate. No effect of either LDL was observed in nontumorigenic MCF-10A cells, whereas in MCF-7 breast cancer cells, treatment with n-3-enriched LDL but not n-6-enriched LDL resulted in significantly greater synthesis of a proteoglycan identified by immunoprecipitation as syndecan-1. Using real-time reverse transcription-PCR (RT-PCR), it was shown that n-3-enriched LDL significantly increased the expression of syndecan-1 mRNA in a dose-dependent manner and maximal effective time at 8 hours of treatment. The effect was mimicked by an agonist for peroxisome proliferator-activated receptor gamma (PPARgamma) and eliminated by the presence of PPARgamma antagonist suggesting a role for PPARgamma in syndecan enhancement. Our studies show that n-3 LDL modifies the production of syndecan-1 in human breast cancer cells and suggest that biological processes regulated by syndecan-1 may be modified through LDL delivery of n-3 PUFA." @default.
- W2097402572 created "2016-06-24" @default.
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- W2097402572 date "2005-05-15" @default.
- W2097402572 modified "2023-09-23" @default.
- W2097402572 title "Omega-3 Polyunsaturated Fatty Acids Regulate Syndecan-1 Expression in Human Breast Cancer Cells" @default.
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- W2097402572 doi "https://doi.org/10.1158/0008-5472.can-04-4200" @default.
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