In:
The Journal of Immunology, The American Association of Immunologists, Vol. 166, No. 10 ( 2001-05-15), p. 6170-6180
Abstract:
The IFN-inducible dsRNA-activated protein kinase PKR regulates protein synthesis through phosphorylation of eukaryotic initiation factor-2α. It also acts as a signal transducer for transcription factors NF-κB, IFN regulatory factor-1, and activating transcription factor-2. IFN-γ, a pleiotropic cytokine, elicits gene expression by activating the Janus kinase-STAT signaling pathway. IFN-γ can synergize with TNF-α to activate NF-κB in a number of cell lines. Here we show that IFN-γ alone can activate NF-κB, by a Janus kinase-1-mediated, but Stat1-independent, mechanism. NF-κB activation by IFN-γ is associated with degradation of IκB β. The IFN-γ response can be blocked by 2′,5′-oligoadenylate-linked antisense chimeras against PKR mRNA. There was no activation of NF-κB by IFN in PKR-null cells, indicating that PKR is required for IFN-γ signaling to NF-κB.
Type of Medium:
Online Resource
ISSN:
0022-1767
,
1550-6606
DOI:
10.4049/jimmunol.166.10.6170
Language:
English
Publisher:
The American Association of Immunologists
Publication Date:
2001
detail.hit.zdb_id:
1475085-5
Permalink