Hepatitis C virus blocks interferon effector function by inducing protein kinase R phosphorylation.
Hepatitis C virus blocks interferon effector function by inducing protein kinase R phosphorylation.
复制标题
DOI:
10.1016/j.chom.2009.11.004
复制
发表时间:
2009-12-17
影响因子:
30.3
通讯作者:
Chisari FV
中科院分区:
文献类型:
--
作者:
Garaigorta U;Chisari FV
The mechanisms underlying hepatitis C virus (HCV) resistance to type 1 interferon (IFN) are not well understood. The recent development of a cell culture model of HCV infection allows analysis of host-virus interactions, including IFN resistance, in the context of the complete virus life cycle. In this report we show that HCV strongly triggers the phosphorylation of PKR and eIF2α as it expands in infected cells. In addition, HCV infection attenuates the induction of interferon-stimulated gene (ISG) protein expression despite normal induction of ISG mRNAs. We also show that ISG protein induction is restored to normal levels and the antiviral effect of IFN is enhanced when PKR expression is down-regulated by shRNA in IFN-treated infected cells. These results suggest that the ability of HCV to activate PKR may, paradoxically, be advantageous for the virus during an IFN response by preferentially suppressing the translation of ISGs.
登录
查看更多内容
影响因子:
3.8
作者:
GRAHAM, FL;SMILEY, J;NAIRN, R
通讯作者:
NAIRN, R
影响因子:
158.5
作者:
McHutchison, JG;Gordon, SC;Albrecht, JK
通讯作者:
Albrecht, JK
影响因子:
13.5
作者:
Hoofnagle, JH
通讯作者:
Hoofnagle, JH
影响因子:
5
作者:
Kang, Ju-Il;Kwon, Shi-Nae;Ahn, Byung-Yoon
通讯作者:
Ahn, Byung-Yoon
影响因子:
5.4
作者:
Friebe, P;Boudet, J;Bartenschlager, R
通讯作者:
Bartenschlager, R