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• W2024458319 startingPage "125" @default.
• W2024458319 abstract "Bacillus anthracis, a causative agent of anthrax, is able to germinate and survive within macrophages. A recent study suggested that B. anthracis-derived nitric oxide (bNO) is a key aspect of bacterial defense that protects bacterial DNA from oxidative burst in the macrophages. However, the virulent effect of bNO in host cells has not been investigated. Here, we report that bNO contributes macrophage killing by S-nitrosylation of bioenergetic-relating proteins within mitochondria. Toxigenic Sterne induces expression of the bnos gene and produces bNO during early stage of infection. Nitroso-proteomic analysis coupled with a biotin-switch technique demonstrated that toxigenic infection induces protein S-nitrosylation in B. anthracis-susceptible RAW264.7. For each target enzyme tested (complex I, complex III and complex IV), infection by B. anthracis Sterne caused enzyme inhibition. Nω-nitro-l-arginine methyl ester, a NO synthase inhibitor, reduced S-nitrosylation and partially restored cell viability evaluated by intracellular ATP levels in macrophages. Our data suggest that bNO leads to energy depletion driven by impaired mitochondrial bioenergetic machinery that ultimately contributes to macrophage death. This novel mechanism of anthrax pathogenesis may offer specific approach to the development of therapeutics." @default.
• W2024458319 created "2016-06-24" @default.
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• W2024458319 date "2013-01-01" @default.
• W2024458319 modified "2023-10-16" @default.
• W2024458319 title "Bacillus anthracis-derived nitric oxide induces protein S-nitrosylation contributing to macrophage death" @default.
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• W2024458319 doi "https://doi.org/10.1016/j.bbrc.2012.11.042" @default.
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• W2024458319 hasPublicationYear "2013" @default.
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