The vesicular stomatitis virus matrix protein inhibits NF-κB activation in mouse L929 cells.

The vesicular stomatitis virus matrix protein inhibits NF-κB activation in mouse L929 cells.
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DOI:
10.1016/j.virol.2016.09.009
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发表时间:
2016-12
期刊:
影响因子:
3.7
通讯作者:
Ferran, Maureen C.
Ferran, Maureen C.
中科院分区:
医学3区
文献类型:
--
作者:
Varble, Andrew J.;Ried, Christopher D.;Hammond, Warren J.;Marquis, Kaitlin A.;Woodruff, Matthew C.;Ferran, Maureen C.

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先前的一项研究发现,NF-κB活化在用野生型(wt)VSV菌株感染的L929细胞中延迟,而在用编码细胞毒性基质(M)蛋白突变的突变株T1026 R1(R1)感染的细胞中活化发生得更早。其他R1蛋白的完整性尚不清楚;因此我们的目标是鉴定负责阻止L929细胞中NF-κB活化的病毒组分。我们发现M蛋白在病毒感染的情况下和通过转染单独表达时抑制病毒介导的NF-κB活化,并且M中的M51 R突变废除了该功能。加入IκB激酶(IKK)抑制剂可阻断感染了编码M中M51 R突变的病毒的细胞中NF-κB活化和干扰素-β mRNA表达。这些结果表明,VSV M蛋白通过靶向经典途径中IKK上游的事件来抑制NF-κB的活化。
A previous study found that NF-κB activation is delayed in L929 cells infected with wild-type (wt) strains of VSV, while activation occurred earlier in cells infected with mutant strain T1026R1 (R1) that encodes a mutation in the cytotoxic matrix (M) protein. The integrity of the other R1 proteins is unknown; therefore our goal was to identify the viral component responsible for preventing NF-κB activation in L929 cells. We found that the M protein inhibits viral-mediated activation of NF-κB in the context of viral infection and when expressed alone via transfection, and that the M51R mutation in M abrogates this function. Addition of an IκB kinase (IKK) inhibitor blocked NF-κB activation and interferon-β mRNA expression in cells infected with viruses encoding the M51R mutation in M. These results indicate that the VSV M protein inhibits activation of NF-κB by targeting an event upstream of IKK in the canonical pathway.
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