The Phagocyte Oxidase Controls Tolerance to Mycobacterium tuberculosis Infection.
The Phagocyte Oxidase Controls Tolerance to Mycobacterium tuberculosis Infection.
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DOI:
10.4049/jimmunol.1800202
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发表时间:
2018-09-15
期刊:
影响因子:
--
通讯作者:
Sassetti CM
中科院分区:
文献类型:
--
作者:
Olive AJ;Smith CM;Kiritsy MC;Sassetti CM
Protection from infectious disease relies on two distinct strategies: antimicrobial “resistance” directly inhibits pathogen growth, whereas infection “tolerance” protects from the negative impact of infection on host health. A single immune-mediator can differentially contribute to these strategies in distinct contexts, confounding our understanding of protection to different pathogens. For example, the NADPH-dependent phagocyte oxidase complex (Phox) produces antimicrobial superoxide and protects from tuberculosis (TB) in humans. However, Phox-deficient mice display no sustained resistance defects to M. tuberculosis, suggesting a more complicated role for NADPH phagocyte oxidase complex than strictly controlling bacterial growth. We examined the mechanisms by which Phox contributes to protection from TB and found that mice lacking the Cybb subunit of Phox suffered from a specific defect in tolerance, which was due to unregulated Caspase 1 activation, interleukin 1β (IL-1β) production, and neutrophil influx into the lung. These studies imply that a defect in tolerance alone is sufficient to compromise immunity to Mtb and highlight a central role for Phox and Caspase 1 in regulating TB disease progression.
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