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NOX1 participates in ROS-dependent cell death of colon epithelial Caco2 cells induced by Entamoeba histolytica

Authors
 Kyeong Ah Kim ; Ju Young Kim ; Myeong Heon Shin ; Deulle Min ; Kyoung-Ju Song ; Young Ah Lee 
Citation
 Microbes and Infection, Vol.13(12-13) : 1052~1061, 2011 
Journal Title
 Microbes and Infection 
ISSN
 1286-4579 
Issue Date
2011
Abstract
Entamoeba histolytica, which causes amebic colitis and occasional liver abscesses in humans, can induce host cell death through apoptosis and necrosis. Recently, we have demonstrated that E. histolytica can induce cell death in neutrophils via diphenyleneiodonium-sensitive NADPH oxidase (NOX)-derived reactive oxygen species (ROS). Although there are enzyme systems similar to the phagocyte NADPH oxidase system in many non-phagocytic cell types, the signaling role of NOX-derived ROS in cell death of human colon epithelial cells induced by E. histolytica remains obscure. Incubation of colon epithelial Caco2 tumor cell lines with amebic trophozoites resulted in intracellular ROS generation and cell death in a caspase-independent manner. Pretreatment with DPI, an inhibitor of NOX, strongly decreased E. histolytica-induced cell death in Caco2 cells. As identified by RT-PCR, NOX1 transcripts were highly expressed in Caco2 cells. siRNA-mediated suppression of NOX1 protein significantly inhibited E. histolytica-induced cell death and ROS response in Caco2 cells. These results suggest that NOX1 participates in the ROS-dependent cell death of colon epithelial cells induced by amebic adhesion during the early phase of intestinal amebiasis.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/94125
DOI
10.1016/j.micinf.2011.06.001
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Environmental Medical Biology
Yonsei Authors
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Link
 http://www.sciencedirect.com/science/article/pii/S1286457911001456
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