Hepatitis C virus proteins activate NRF2/ARE pathway by distinct ROS-dependent and independent mechanisms in HUH7 cells.
Hepatitis C virus proteins activate NRF2/ARE pathway by distinct ROS-dependent and independent mechanisms in HUH7 cells.
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DOI:
10.1371/journal.pone.0024957
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Isaguliants MG
中科院分区:
文献类型:
--
作者:
Ivanov AV;Smirnova OA;Ivanova ON;Masalova OV;Kochetkov SN;Isaguliants MG
Hepatitis C virus (HCV) is a highly pathogenic human virus associated with liver fibrosis, steatosis, and cancer. In infected cells HCV induces oxidative stress. Here, we show that HCV proteins core, E1, E2, NS4B, and NS5A activate antioxidant defense Nrf2/ARE pathway via several independent mechanisms. This was demonstrated by the analysis of transient co-expression in Huh7 cells of HCV proteins and luciferase reporters. Expression, controlled by the promoters of stress-response genes or their minimal Nrf2-responsive elements, was studied using luminescence assay, RT-qPCR and/or Western-blot analysis. All five proteins induced Nrf2 activation by protein kinase C in response to accumulation of reactive oxygen species (ROS). In addition, expression of core, E1, E2, NS4B, and NS5A proteins resulted in the activation of Nrf2 in a ROS-independent manner. The effect of core and NS5A was mediated through casein kinase 2 and phosphoinositide-3 kinase, whereas those of NS4B, E1, and E2, were not mediated by either PKC, CK2, PI3K, p38, or ERK. Altogether, on the earliest stage of expression HCV proteins induced a strong up-regulation of the antioxidant defense system. These events may underlie the harmful effects of HCV-induced oxidative stress during acute stage of hepatitis C.
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影响因子:
25.7
作者:
Dionisio, Natalia;Garcia-Mediavilla, Maria V.;Gonzalez-Gallego, Javier
通讯作者:
Gonzalez-Gallego, Javier
DOI:
10.1073/pnas.171311298
发表时间:
2001-08-14
影响因子:
11.1
作者:
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作者:
Carvajal-Yepes, Monica;Himmelsbach, Kiyoshi;Hildt, Eberhard
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影响因子:
5.4
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Boudreau, Howard E.;Emerson, Suzanne U.;Leto, Thomas L.
通讯作者:
Leto, Thomas L.
影响因子:
7.4
作者:
Levent, Goerenek;Ali, Acar;Ahmet, Sayal
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Ahmet, Sayal