Redox warfare between airway epithelial cells and Pseudomonas: dual oxidase versus pyocyanin.

Redox warfare between airway epithelial cells and Pseudomonas: dual oxidase versus pyocyanin.
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DOI:
10.1007/s12026-008-8071-8
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发表时间:
2009
影响因子:
4.4
通讯作者:
Leto, Thomas L.
Leto, Thomas L.
中科院分区:
医学4区
文献类型:
--
作者:
Rada, Balazs;Leto, Thomas L.

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虽然直到最近才认识到乳酸过氧化物酶与气道表层分泌物中相关的双氧化酶(Duox)的合作关系,但人们对吞噬细胞NADPH氧化酶对活性氧依赖的微生物杀灭的重要性已经认识了一段时间。这个系统产生温和的氧化剂,设计用于细胞外杀伤,有效对抗几种气道病原体,包括金黄色葡萄球菌,洋葱Bulkhoderia和铜绿假单胞菌。慢性假单胞菌感染的建立涉及通过氧化还原活性毒力因子pyocyanin的表达来抵抗氧化依赖性杀伤的适应性,pyocyanin通过消耗细胞内NADPH和产生超氧化物来竞争性地抑制上皮Duox活性,从而对宿主造成氧化应激。
The importance of reactive oxygen species-dependent microbial killing by the phagocytic cell NADPH oxidase has been appreciated for some time, although only recently has an appreciation developed for the partnership of lactoperoxidase with related dual oxidases (Duox) within secretions of the airway surface layer. This system produces mild oxidants designed for extracellular killing that are effective against several airway pathogens, including Staphylococcus aureus, Bulkhoderia cepacia, and Pseudononas aeruginosa. Establishment of chronic pseudomonas infections involves adaptations to resist oxidant-dependent killing by expression of a redox-active virulence factor, pyocyanin, that competitively inhibits epithelial Duox activity by consuming intracellular NADPH and producing superoxide, thereby inflicting oxidative stress on the host.
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