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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effects of fatty acids and inhibitors of eicosanoid synthesis on the growth of a human breast cancer cell line in culture.

Dietary lipids may influence breast cancer progression and prognosis. The MDA-MB-231 human breast cancer cell line was used to examine the direct effects of the various classes of free fatty acids (FAs) on growth in serum-free medium and the involvement of eicosanoid biosynthesis. Linoleic acid, an omega 6 FA, stimulated MDA-MB-231 cell growth with an optimal effect at a concentration of 0.75 microgram/ml, whereas oleic acid, an omega 9 FA, produced growth stimulation at 0.25 microgram/ml but was inhibitory at higher concentrations. Docosahexaenoic acid exhibited a dose-related inhibition of cell growth at concentrations ranging from 0.5 to 2.5 micrograms/ml; eicosapentaenoic acid, also an omega 3 FA, was less effective. Similar inhibitory effects occurred with saturated FAs. Indomethacin, which at high concentrations is an inhibitor of both the cyclooxygenase- and lipoxygenase-catalyzed pathways of eicosanoid synthesis, suppressed cell growth stimulation by an otherwise optimal dose of linoleic acid when present at 40 micrograms/ml. Experiments with piroxicam, nordihydroguaiaretic acid, and esculetin, other inhibitors of eicosanoid biosynthesis with varying selectivity for enzymes of the prostaglandin and leukotriene pathways, indicated that MDA-MB-231 cell growth was dependent on leukotriene rather than prostaglandin production.[1]


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