Pseudomonas aeruginosa internalization by corneal epithelial cells involves MEK and ERK signal transduction proteins.

Pseudomonas aeruginosa internalization by corneal epithelial cells involves MEK and ERK signal transduction proteins.
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角膜上皮细胞对铜绿假单胞菌的内化涉及 MEK 和 ERK 信号转导蛋白。

DOI:
10.1111/j.1574-6968.2002.tb11288.x
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发表时间:
2002
影响因子:
2.1
通讯作者:
Fleiszig,SuzanneMJ
Fleiszig,SuzanneMJ
中科院分区:
生物学4区
文献类型:
--
作者:
Evans,DavidJ;Maltseva,InnaA;Wu,Josephine;Fleiszig,SuzanneMJ

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上皮细胞的侵袭是铜绿假单胞菌潜在的致病机制。本研究探讨了丝裂原活化蛋白激酶(MEK 1/2)和细胞外信号调节激酶(ERK 1/2)在P.铜绿假单胞菌入侵。用MEK抑制剂PD 98059(20 μM)或UO 126(100 μM)处理角膜上皮细胞,在不影响细菌与细胞结合的情况下,嗜水气单胞菌的侵袭性降低了约60%(P=0.0001)。UO 124是UO 126的阴性对照,对细菌内化没有影响。用P.与野生型侵袭性P感染相比,铜绿假单胞菌感染与ERK 1/2酪氨酸磷酸化较少相关。铜绿。ERK-2抑制剂5-iodotubercidin(20 μM)可降低P.肺动脉侵犯率为40%(P=0.035)。总之,这些数据表明,P.上皮细胞的需氧代谢内化涉及包括MEK和ERK信号传导蛋白的途径。
Invasion of epithelial cells represents a potential pathogenic mechanism forPseudomonas aeruginosa. We explored the role of mitogen-activated protein kinase kinases (MEK 1/2) and the extracellular signal-regulated kinases (ERK 1/2) inP. aeruginosainvasion. Treatment of corneal epithelial cells with MEK inhibitors, PD98059 (20 μM) or UO126 (100 μM), reducedP. aeruginosainvasion by ∼60% without affecting bacterial association with the cells (P=0.0001). UO124, a negative control for UO126, had no effect on bacterial internalization. Infection of cells with an internalization-defectiveflhAmutant ofP. aeruginosawas associated with less ERK 1/2 tyrosine phosphorylation than infection with wild-type invasiveP. aeruginosa. An ERK-2 inhibitor, 5-iodotubercidin (20 μM), reducedP. aeruginosainvasion by ∼40% (P=0.035). Together, these data suggest thatP. aeruginosainternalization by epithelial cells involves a pathway(s) that includes MEK and ERK signaling proteins.
DOI: 10.1128/iai.63.10.4072-4077.1995
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DOI: --
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