IL-1b Attenuates IFN-ab-Induced Antiviral Activity and STAT1 Activation in the Liver: Involvement of Proteasome-Dependent Pathway
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Fish virus-induced interferon exerts antiviral function through Stat1 pathway.
Virus-induced interferons (IFNs) have been identified in various fish species and display antiviral activities similar to mammalian type I IFNs. However, apart from the mammalian IFN system, the IFN signaling pathway remains largely unknown. Using transient transfection and recombinant protein, we are reporting in this study that a crucian carp (Carassius auratus L.) IFN exhibits strong antivir...
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IFN-γ (interferon-γ ) modulates IFN-α therapy in chronic hepatitis C infection; however, the underlying mechanism remains unclear. Here we demonstrate that long-term (3–6 days) but not short-term (up to 1 day) IFN-γ treatment of human hepatoma Hep3B cells attenuates IFN-α activation of STAT1 (signal transducers and activators of transcription factor 1), STAT2 and STAT3, but enhances IFN-γ and i...
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Teng, Xingwu, Hanfang Zhang, Connie Snead, and John D. Catravas. Molecular mechanisms of iNOS induction by IL-1b and IFN-g in rat aortic smooth muscle cells. Am J Physiol Cell Physiol 282: C144–C152, 2002;—In rat aortic smooth muscle cells (RASMC), interferon (IFN)-g enhanced nitrite accumulation and type II nitric oxide synthase (iNOS) protein expression induced by interleukin (IL)-1b. IFN-g a...
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BACKGROUND/AIMS Signal transducer and activator of transcription (STAT) pathway plays an important role in antiviral efficacy of interferon alpha (IFN-α). IFN-α is the main therapeutic against hepatitis C virus (HCV) infection. We explored effects of IFN-α on HCV replication and antiviral gene expression by targeting STAT. METHODS In response to IFN-α, STAT status, HCV replication, and antivi...
متن کاملInterferons activate the p42/44 mitogen-activated protein kinase and JAK-STAT (Janus kinase-signal transducer and activator transcription factor) signalling pathways in hepatocytes: differential regulation by acute ethanol via a protein kinase C-dependent mechanism.
Interferons (IFNs) have been used in the treatment of viral hepatitis. However, their effectiveness is much reduced (<10%) in alcoholics. The mechanism underlying this resistance remains unknown. Here, we report that IFN-alpha/beta and IFN-gamma rapidly activate the JAK-STAT1 (Janus kinase-signal transducer and activator transcription factor 1) and p42/44 mitogen-activated protein kinase (p42/4...
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تاریخ انتشار 2000