Abstract:
:Tumor necrosis factor receptor 1 (TNFR1)-associated death domain protein (TRADD) is essential in recruiting signaling molecules to the TNFR1 receptor complex. Interferon-gamma (IFN-gamma) is a potent activator of macrophages and uses signal transducer and activator of transcription 1-alpha (STAT1-alpha) for signal transduction. Here we demonstrate that IFN-gamma induces the formation of a nuclear-localized TRADD-STAT1-alpha complex. IFN-gamma-mediated STAT1-alpha phosphorylation was prolonged in cells with reduced TRADD expression. Moreover, we noted an increase in IFN-gamma-mediated STAT1-alpha DNA-binding activity, nuclear presence and transcriptional potential in the TRADD knockdown cells. These data indicate that TRADD may be involved in IFN-gamma signaling by forming a complex with STAT1-alpha within the nucleus and regulating IFN-gamma-mediated STAT1-alpha activation.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Wesemann DR,Qin H,Kokorina N,Benveniste ENdoi
10.1038/ni1025keywords:
subject
Has Abstractpub_date
2004-02-01 00:00:00pages
199-207issue
2eissn
1529-2908issn
1529-2916pii
ni1025journal_volume
5pub_type
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