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- W1998538420 abstract "Introduction: Cytolethal distending toxin (CDT) is a DNA‐targeting agent produced by certain pathogenic gram‐negative bacteria such as the periodontopathogenic organism Aggregatibacter actinomycetemcomitans . CDT targets lymphocytes and other cells causing cell cycle arrest and apoptosis, impairing the host immune response and contributing to the persistence of infections caused by this microorganism. In this study we explored the effects of CDT on the innate immune response, by investigating how it affects production of nitric oxide (NO) by macrophages. Methods: Murine peritoneal macrophages were stimulated with Escherichia coli sonicates and NO production was measured in the presence or not of active CDT. Results: We observed that CDT promptly and significantly inhibited NO production by inducible nitric oxide synthase (iNOS) in a dose‐dependent manner. This inhibition is directed towards interferon‐γ‐dependent pathways and is not mediated by either interleukin‐4 or interleukin‐10. Conclusion: This mechanism may constitute an important aspect of the immunosuppression mediated by CDT and may have potential clinical implications in A. actinomycetemcomitans infections." @default.
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- W1998538420 date "2008-08-08" @default.
- W1998538420 modified "2023-10-12" @default.
- W1998538420 title "Inhibition of interferon-γ-induced nitric oxide production in endotoxin-activated macrophages by cytolethal distending toxin" @default.
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- W1998538420 doi "https://doi.org/10.1111/j.1399-302x.2008.00434.x" @default.
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