期刊
FEBS JOURNAL
卷 284, 期 20, 页码 3392-3403出版社
WILEY
DOI: 10.1111/febs.14199
关键词
caspase-1; ExoY; motility; NF-kappa B; Pseudomonas aeruginosa
资金
- National Research Foundation of Korea [NRF-2016R1A2B4007539]
- BK21 plus program of the Ministry of Education, Korea
- National Research Foundation of Korea [22A20130012793] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Type III-secreted effectors are essential for modulating host immune responses during the pathogenesis of Pseudomonasaeruginosa infections. Little is known about the impact of one of the effectors, ExoY, on inflammasome activation, which results in IL-1 beta production and pyroptotic cell death. In this study, we found that transcriptional expression of Il-1 beta was induced to a lesser extent in response to an exoY-harboring strain than to a deleted mutant. This suppressive effect of ExoY was verified by complementation assay as well as by direct translocation of exoY into host cells. In addition to the production of IL-1 beta, pyroptotic cell death was also diminished in response to an exoY-harboring strain. These inflammasome responses were mediated by the adenylate cyclase activity of ExoY, which plays a role in delaying the activation of NF-kappa B and caspase-1, a key component of inflammasome-mediated responses. Moreover, the negative effects of ExoY on these responses were in part conferred by the suppression of bacterial motility, which could reduce the degree of bacterial contact with cells. Together, these results demonstrate that the adenylate cyclase activity of P.aeruginosa ExoY can reduce inflammasome-related responses by influencing both the host and the bacterium itself by delaying the activation of inflammatory pathways and suppressing bacterial motility.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据