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|Type:||Artigo de periódico|
|Title:||Oleic, Linoleic and Linolenic Acids Increase ROS Production by Fibroblasts via NADPH Oxidase Activation|
|Abstract:||The effect of oleic, linoleic and gamma-linolenic acids on ROS production by 3T3 Swiss and Rat 1 fibroblasts was investigated. Using lucigenin-amplified chemiluminescence, a dose-dependent increase in extracellular superoxide levels was observed during the treatment of fibroblasts with oleic, linoleic and gamma-linolenic acids. ROS production was dependent on the addition of beta-NADH or NADPH to the medium. Diphenyleneiodonium inhibited the effect of oleic, linoleic and gamma-linolenic acids on fibroblast superoxide release by 79%, 92% and 82%, respectively. Increased levels of p47(phox) phosphorylation due to fatty acid treatment were detected by Western blotting analyses of fibroblast proteins. Increased p47(phox) mRNA expression was observed using real-time PCR. The rank order for the fatty acid stimulation of the fibroblast oxidative burst was as follows: gamma-linolenic > linoleic > oleic. In conclusion, oleic, linoleic and gamma-linolenic acids stimulated ROS production via activation of the NADPH oxidase enzyme complex in fibroblasts.|
|Editor:||Public Library Science|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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