Conditional privatization of a public siderophore enables Pseudomonas aeruginosa to resist cheater invasion.

Conditional privatization of a public siderophore enables Pseudomonas aeruginosa to resist cheater invasion.
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有条件地私有化公共铁载体使铜绿假单胞菌能够抵抗作弊者的入侵

DOI:
10.1038/s41467-018-03791-y
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发表时间:
2018-04-11
影响因子:
16.6
通讯作者:
Jin F
Jin F
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Jin Z;Li J;Ni L;Zhang R;Xia A;Jin F

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了解细菌在宿主体内协同行为的机制对临床治疗具有重要意义。环境压力通常被认为会增加竞争,减少细菌的合作。在这里,我们表明,细菌的合作实际上可以保持,因为环境压力。我们发现,铜绿假单胞菌调节铁清除铁载体的分泌在不同的环境压力的存在下,保留这一公共产品的私人使用,在保护活性氧在压力下。我们称这种战略为“有条件的私有化”。使用实验进化和理论建模相结合,我们证明,在环境压力的存在下,有条件的私有化战略是抵抗入侵的非生产骗子。这些发现表明,压力下公共产品分泌的调节如何影响致病群体中合作的进化稳定性,这可能有助于合理开发新疗法。
Understanding the mechanisms that promote cooperative behaviors of bacteria in their hosts is of great significance to clinical therapies. Environmental stress is generally believed to increase competition and reduce cooperation in bacteria. Here, we show that bacterial cooperation can in fact be maintained because of environmental stress. We show that Pseudomonas aeruginosa regulates the secretion of iron-scavenging siderophores in the presence of different environmental stresses, reserving this public good for private use in protection against reactive oxygen species when under stress. We term this strategy “conditional privatization”. Using a combination of experimental evolution and theoretical modeling, we demonstrate that in the presence of environmental stress the conditional privatization strategy is resistant to invasion by non-producing cheaters. These findings show how the regulation of public goods secretion under stress affects the evolutionary stability of cooperation in a pathogenic population, which may assist in the rational development of novel therapies.
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