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Pseudomonas aeruginosa 通过 Rhl-Pqs 质量感应相互作用调解宿主亡

Zihao Liu^1,2, Lu Sun³, Lupeng Li^4,5,6,7

¹Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, Columbus, OH.

|September 23, 2024

概括

伪菌的定数感应 (QS) 调节宿主细胞死亡. 在rhl QS系统的缺陷增加了由pqs系统调解的巨细胞亡,揭示了感染期间的关键交叉对话.

科学领域:

微生物学微生物学
免疫学免疫学免疫学
细胞生物学细胞生物学

背景情况:

伪气球菌 (P. aeruginosa) 是一种机会性病原体.
细菌的定数感应 (QS) 调节毒性和宿主相互作用.
在宿主细胞死亡中P. aeruginosa QS的作用尚不清楚.

研究的目的:

为了研究P. aeruginosa QS在宿主细胞死亡中的作用.
阐明涉及P. aeruginosa诱导的细胞死亡的特定QS系统.

主要方法:

使用了缺乏QS系统 (rhl,pqs) 的P. aeruginosa突变.
在体外和体外评估了巨细胞死亡和亡标记物 (RIPK3,MLKL酸化).
分析了rhl和pqs QS系统之间的相互作用.

主要成果:

小鼠骨髓巨细胞死亡在P. aeruginosa rhl缺陷感染中增加.
升高的RIPK3和MLKL酸化表明亡的增加.
由于rhl缺乏导致pqs QS系统的升级导致了亡.
在rhl缺乏的P. aeruginosa中删除pqs消除了巨细胞亡.

结论:

P. aeruginosa QS显著影响宿主亡.
在rhl-pqs QS轴中介于P. aeruginosa诱导的巨细胞亡.
突出了细菌QS和宿主免疫路径之间的交叉对话.

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