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- W2016116043 abstract "We recently showed that treatment of macrophages prior to Mycobacterium tuberculosis infection with the pro-inflammatory omega-6 lipid, arachidonic acid (AA) enhanced bacterial killing whereas the anti-inflammatory, omega-3 lipid eicosapentaenoic acid (EPA) stimulated bacterial growth. Here we tested if these effects were depending on when lipids were added to macrophages: before or during Mycobacterium smegmatis or M. tuberculosis infection. Collectively, our data suggested that a high omega-6 diet might be beneficial against mycobacteriosis, while a high omega-3 diet might be detrimental. AA also stimulated TNF-alpha secretion in M. tuberculosis-infected macrophages whereas EPA inhibited this process. AA strongly activated the MAP kinase p38 in uninfected cells but M. tuberculosis infected cells blocked the ability of AA to activate p38; AA-dependent killing is therefore independent of p38. We therefore tested diets enriched in omega-3 and omega-6 lipids on a mouse model of tuberculosis. In contrast to the in vitro results, the omega-6 tended to increase survival of M. tuberculosis in mice, while omega-3- tended to increase pathogen killing. Overall our results together with those previously reported in the literature suggest that it is almost impossible to predict, at the whole organism level, if a diet enriched in omega-3 or -6 will be beneficial or detrimental to intracellular pathogens." @default.
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- W2016116043 date "2008-10-01" @default.
- W2016116043 modified "2023-10-16" @default.
- W2016116043 title "Effects of omega-3 and -6 fatty acids on Mycobacterium tuberculosis in macrophages and in mice" @default.
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- W2016116043 doi "https://doi.org/10.1016/j.micinf.2008.08.004" @default.
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