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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/16160


    Title: Japanese encephalitis virus down-regulates thioredoxin and induces ROS-mediated ASK1-ERK/p38 MAPK activation in human promonocyte cells
    Authors: 林振文;LIN, CHENG-WEN
    Contributors: 生物科技學系
    Keywords: Japanese encephalitis virus;Apoptosis;Oxidative stress;ER stress;Thioredoxin;ASK1;ERK1/2;p38 MAPK
    Date: 2010
    Issue Date: 2012-11-23 17:09:20 (UTC+8)
    Abstract: Japanese encephalitis virus (JEV), a mosquito-borne flavivirus, causes severe neurological disease with high mortality. Molecular mechanisms of JEV pathogenesis such as upstream apoptotic processes and pathways are not yet completely resolved or understood. In this study, JEV replication in human promonocyte cells induced time-dependent apoptosis and activated virus dose-dependent caspases 3, 8 and 9. Proteomic analysis demonstrated up- and down-regulated (more or less than 1.5-fold) proteins in JEV-infected promonocyte cells. Biological process categorization showed processes of antioxidation, free radical removal, and sulfur redox metabolism entailed many identified up- and down-regulated proteins. Down-regulation of thioredoxin, confirmed by using Western blotting, was involved in the apoptosis process of the oxidative stress response pathway. JEV infection caused increased intracellular ROS production and activation of ASK1-ERK/p38 MAPK signaling. ERK/p38 MAPK inhibitor PD98059 treatment definitely suppressed this apoptosis. Down-regulation of thioredoxin, increased intracellular ROS, and activation of ASK1-ERK/p38 MAPK signaling all were associated with JEV-induced apoptosis. These results are suggestive of an oxidative stress-pathway as a key element of JE pathogenesis.
    Relation: MICROBES AND INFECTION
    Appears in Collections:[生物科技學系] 期刊論文

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