Host derived inflammatory phospholipids regulate rahU (PA0122) gene, protein, and biofilm formation in Pseudomonas aeruginosa.

Host derived inflammatory phospholipids regulate rahU (PA0122) gene, protein, and biofilm formation in Pseudomonas aeruginosa.
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DOI:
10.1016/j.cellimm.2011.04.011
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发表时间:
2011
影响因子:
4.3
通讯作者:
Goldberg, Joanna B.
Goldberg, Joanna B.
中科院分区:
医学4区
文献类型:
--
作者:
Rao, Jayasimha;DiGiandomenico, Antonio;Artamonov, Mykhaylo;Leitinger, Norbert;Amin, Ashok R.;Goldberg, Joanna B.

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本研究描述了“炎性”氧化(Ox)磷脂在铜绿假单胞菌(383)野生型(rahU+)和rahU突变体(rahU−)中rahU(PA 0122)表达和生物膜形成的调节作用。对铜绿假单胞菌(P. aeruginosa)的RahU蛋白在Ox磷脂存在下的功能分析表明:(a)LysoPC调节rahU+细胞中RahU基因-蛋白的表达:(B)lysoPC增加rahU启动子活性,而PAPC、Ox-PAPC和花生四烯酸抑制rahU启动子活性,后者的抑制作用可被PAPC酶解产物lysoPC逆转;(c)与rahU+细胞相比,rahU−细胞中的生物膜形成增加;(d)PAPC和AA(但不是lysoPC)对rahU启动子活性的抑制显示rahU+细胞中的生物膜形成显著增加,但在rahU−细胞中没有。该研究表明,宿主来源的Ox-磷脂影响铜绿假单胞菌rahU基因和蛋白的表达,从而调节生物膜的形成。随附的论文描述了RahU在真核宿主细胞中的作用。
This study describes the role of “inflammatory” oxidative (Ox) phospholipids in regulation of rahU (PA0122) expression and biofilm formation in Pseudomonas aeruginosa (383) wild type (rahU+) and rahU mutant (rahU−). Functional analysis of RahU protein from P. aeruginosa in presence of Ox-phospholipids show: (a) LysoPC modulates RahU gene-protein expression in rahU+ cells; (b) rahU promoter activity is increased by lysoPC and inhibited by PAPC, Ox-PAPC and arachidonic acid; the latter inhibitory effect can be reversed by lysoPC, which was enzymatically derived from PAPC; (c) biofilm formation increased in rahU− cells as compared to rahU+; and (d) inhibition of rahU promoter activity by PAPC and AA (but not lysoPC) showed significantly augmented biofilm formation in rahU+ but not in rahU− cells. This study shows that host derived Ox-phospholipids affect P. aeruginosa-rahU gene and protein expression, which in turn modulates biofilm formation. The accompanying paper describes the role of RahU in eukaryotic-host cells.
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