HIV-1 Vpr activates both canonical and noncanonical NF-κB pathway by enhancing the phosphorylation of IKKα/β
HIV-1 Vpr activates both canonical and noncanonical NF-κB pathway by enhancing the phosphorylation of IKKα/β
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DOI:
10.1016/j.virol.2013.01.020
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发表时间:
2013-04-25
期刊:
影响因子:
3.7
通讯作者:
Qiao, Wentao
中科院分区:
文献类型:
--
作者:
Liu, Ruikang;Tan, Juan;Qiao, Wentao
The human immunodeficiency virus type I (HIV-1) Vpr plays an essential role in viral replication. A number of studies have reported that Vpr modulates the nuclear factor-kappa B (NF-kappa B) pathway. Yet, the reported effects of Vpr on NF-kappa B signaling are controversial. In this study, we investigate the interplay between Vpr and NF-kappa B pathway. We discover that HIV-1 infection elevates the phosphorylation of I kappa B alpha and p100, and that this increase is greatly reduced when a Vpr-negative HIV-1 is used for infection. Our data further show that Vpr regulates the activity of IKK alpha/beta through interactions. In addition, Vpr modulates the phosphorylation of p65 and p100, suggesting that Vpr activates both canonical and noncanonical NF-kappa B pathway. Knock down of endogenous IKK alpha/beta result in a decrease in Vpr-mediated NF-kappa B and HIV-1 LTR activation. Given that Vpr is present in HIV-1 particles, our data suggest that Vpr activates the NF-kappa B pathway immediately after HIV-1 entry. (C) 2013 Elsevier Inc. All rights reserved.