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. 1997 Feb;71(2):1718–1725. doi: 10.1128/jvi.71.2.1718-1725.1997

Induction of CD4 expression and human immunodeficiency virus type 1 replication by mutants of the interferon-inducible protein kinase PKR.

K Nagai 1, A H Wong 1, S Li 1, W N Tam 1, A R Cuddihy 1, N Sonenberg 1, M B Mathews 1, J Hiscott 1, M A Wainberg 1, A E Koromilas 1
PMCID: PMC191238  PMID: 8995707

Abstract

Replication of the human immunodeficiency virus type 1 (HIV-1) is inhibited by interferons (IFNs), and the IFN-inducible protein kinase PKR is thought to mediate this effect by regulating protein synthesis. Here we report that ectopic expression of dominant negative PKR mutants in Jurkat cells induces HIV-1 replication. Specifically, expression of CD4 is upregulated by the PKR mutants, and this correlates with an induction of HIV-1 binding and proviral DNA synthesis upon HIV-1 infection. Moreover, activation of NF-kappaB was induced by an RNA binding-defective mutant of PKR. Thus, it appears that PKR, in addition to translational control, is involved in HIV-1 replication by modulating virus binding through the regulation of CD4 expression and virus gene expression through the activation of NF-kappaB.

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Selected References

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