title: Role of arachidonic acid metabolism in Stat5 activation induced by oleic acid in MDA-MB-231 breast cancer cells.
abstract: Epidemiological studies and animal models suggest an association between high levels of dietary fat intake and an increased risk of breast cancer. In breast cancer cells, the free fatty acid oleic acid (OLA) induces proliferation, migration, invasion and an increase of MMP-9 secretion. However, the role of OLA on Stat5 activation and the participation of COX-2 and LOXs activity in Stat5 activation induced by OLA remain to be investigated. We demonstrate here that stimulation of MDA-MB-231 breast cancer cells with 100 μM OLA induces Stat5 phosphorylation at Tyr-694 and an increase of Stat5-DNA complex formation. The Stat5 DNA-binding activity requires COX-2, LOXs, metalloproteinases and Src activities. In addition, OLA induces cell migration through a Stat5-dependent pathway. In summary, our findings establish that OLA induces cell migration through a Stat5-dependent pathway and that Stat5 activation requires AA metabolites in MDA-MB-231 breast cancer cells.
authors: Departamento de Biologia Celular, Cinvestav-IPN, Av. IPN # 2508, San Pedro Zacatenco, Mexico, DF 07360, Mexico.
authors: Adriana
authors: A
authors: Soto-Guzman
authors: Socrates
authors: S
authors: Villegas-Comonfort
authors: Pedro
authors: P
authors: Cortes-Reynosa
authors: Eduardo
authors: E
authors: Perez Salazar
mesh_terms: D016718:Arachidonic Acid / Q000378:metabolism*; D001943:Breast Neoplasms; D002465:Cell Movement / Q000187:drug effects; D051546:Cyclooxygenase 2 / Q000378:metabolism; D004151:Dipeptides / Q000494:pharmacology; D024202:Electrophoretic Mobility Shift Assay; D005260:Female; D006801:Humans; D007211:Indoles / Q000494:pharmacology; D019787:Linoleic Acid / Q000494:pharmacology / Q000502:physiology; D058945:Lipoxygenases / Q000378:metabolism; D061986:MCF-7 Cells; D061965:Matrix Metalloproteinase Inhibitors / Q000494:pharmacology; D020782:Matrix Metalloproteinases / Q000378:metabolism; D019301:Oleic Acid / Q000494:pharmacology / Q000502:physiology*; D011485:Protein Binding; D050799:STAT5 Transcription Factor / Q000378:metabolism*; D015398:Signal Transduction; D013449:Sulfonamides / Q000494:pharmacology; D019061:src-Family Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism
chemical_list: D004151:Dipeptides; D007211:Indoles; D061965:Matrix Metalloproteinase Inhibitors; C078131:N-(2(R)-2-(hydroxamidocarbonylmethyl)-4-methylpentanoyl)-L-tryptophan methylamide; D050799:STAT5 Transcription Factor; C416927:SU 6656; D013449:Sulfonamides; D016718:Arachidonic Acid; D019301:Oleic Acid; D019787:Linoleic Acid; D058945:Lipoxygenases; D051546:Cyclooxygenase 2; C496540:PTGS2 protein, human; D019061:src-Family Kinases; D020782:Matrix Metalloproteinases