Apoptosis-inducing factor contributes to epithelial cell apoptosis induced by enteropathogenic Escherichia coli

被引:1
|
作者
Flynn, Andrew N. [1 ,2 ]
Wang, Arthur [2 ]
Mckay, Derek M. [2 ]
Buret, Andre G. [1 ,2 ]
机构
[1] Univ Calgary, Dept Biol Sci, Calgary, AB T2N 1N4, Canada
[2] Univ Calgary, Inflammat Res Network, Calgary, AB T2N 1N4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
MITOCHONDRIAL RELEASE; TIGHT JUNCTIONS; INFECTION; DISRUPTION; MEMBRANE; INITIATE; PATHWAY; DEATH; AIF;
D O I
10.1139/Y11-002
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
The mechanisms by which enteropathogenic Escherichia coli (EPEC) causes intestinal epithelial cell apoptosis remain unclear. We tested the hypothesis that apoptosis-inducing factor (AIF) is involved in apoptosis induced by EPEC. Infection of intestinal epithelial cells in vitro with EPEC led to the mitochondrial and cytosolic accumulation of AIF. This effect was partially dependent on caspase activity. Knockdown of AIF with siRNA blocked cellular apoptosis in response to EPEC infection, as assessed by poly(ADP-ribose) polymerase cleavage and oligonucleosome formation. Taken together, these data suggest that caspase-dependent mobilization of AIF contributes to EPEC-induced epithelial cell apoptosis.
引用
收藏
页码:143 / 148
页数:6
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