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Involvement of Src tyrosine kinase in Escherichia coli invasion of human brain microvascular endothelial cells

Author:
Liu, Wei  Zhao, Wei-Dong  Yan, Jin-Chun  Ren, Zhi-Yuan  Fang, Wen-Gang  Zhu, Li  Shang, De-Shu  Chen, Yu-Hua  


Journal:
FEBS LETTERS


Issue Date:
2010


Abstract(summary):

Invasion of brain microvascular endothelial cells is a prerequisite for successful crossing of the blood-brain barrier by Escherichia coli (E. coli), but the underlying mechanism remains unclear. Here we showed activation of Src tyrosine kinase in E. coli K1 invasion of human brain microvascular endothelial cells (HBMEC). E. coli invasion of HBMEC and the E. coli-induced rearrangement of actin. laments were blocked by Src inhibitors. Overexpression of dominant-negative Src in HBMEC significantly attenuated E. coli invasion and the concomitant actin. laments rearrangement. Furthermore, E. coli K1-triggered phosphatidylinositol 3-kinase (PI3K) activation in HBMEC was effectively blocked by Src inhibitors and dominant-negative Src. These results demonstrated the involvement of Src and its interaction with PI3K in E. coli K1 invasion of HBMEC.


Page:
27---32


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