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• W2047385861 startingPage "e96203" @default.
• W2047385861 abstract "Macrophages and neutrophils generate a potent burst of reactive oxygen and nitrogen species as a key aspect of the antimicrobial response. While most successful pathogens, including the fungus Candida albicans, encode enzymes for the detoxification of these compounds and repair of the resulting cellular damage, some species actively modulate immune function to suppress the generation of these toxic compounds. We report here that C. albicans actively inhibits macrophage production of nitric oxide (NO). NO production was blocked in a dose-dependent manner when live C. albicans were incubated with either cultured or bone marrow-derived mouse macrophages. While filamentous growth is a key virulence trait, yeast-locked fungal cells were still capable of dose-dependent NO suppression. C. albicans suppresses NO production from macrophages stimulated by exposure to IFN-γ and LPS or cells of the non-pathogenic Saccharomyces cerevisiae. The NO inhibitory activity was produced only when the fungal cells were in direct contact with macrophages, but the compound itself was secreted into the culture media. LPS/IFNγ stimulated macrophages cultured in cell-free conditioned media from co-cultures showed reduced levels of iNOS enzymatic activity and lower amounts of iNOS protein. Initial biochemical characterization of this activity indicates that the inhibitor is a small, aqueous, heat-stable compound. In summary, C. albicans actively blocks NO production by macrophages via a secreted mediator; these findings expand our understanding of phagocyte modulation by this important fungal pathogen and represent a potential target for intervention to enhance antifungal immune responses." @default.
• W2047385861 created "2016-06-24" @default.
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• W2047385861 date "2014-04-22" @default.
• W2047385861 modified "2023-10-16" @default.
• W2047385861 title "Candida albicans Suppresses Nitric Oxide Generation from Macrophages via a Secreted Molecule" @default.
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• W2047385861 doi "https://doi.org/10.1371/journal.pone.0096203" @default.
• W2047385861 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3995984" @default.
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