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• W2969658635 abstract "We describe a novel function for the interferon (IFN)-induced protein 44-like (IFI44L) gene in negatively modulating innate immune responses induced after virus infections. Furthermore, we show that decreasing IFI44L expression impairs virus production and that IFI44L expression negatively modulates the antiviral state induced by an analog of double-stranded RNA (dsRNA) or by IFN treatment. The mechanism likely involves the interaction of IFI44L with cellular FK506-binding protein 5 (FKBP5), which in turn interacts with kinases essential for type I and III IFN responses, such as inhibitor of nuclear factor kappa B (IκB) kinase alpha (IKKα), IKKβ, and IKKε. Consequently, binding of IFI44L to FKBP5 decreased interferon regulatory factor 3 (IRF-3)-mediated and nuclear factor kappa-B (NF-κB) inhibitor (IκBα)-mediated phosphorylation by IKKε and IKKβ, respectively. According to these results, IFI44L is a good target for treatment of diseases associated with excessive IFN levels and/or proinflammatory responses and for reduction of viral replication.IMPORTANCE Excessive innate immune responses can be deleterious for the host, and therefore, negative feedback is needed. Here, we describe a completely novel function for IFI44L in negatively modulating innate immune responses induced after virus infections. In addition, we show that decreasing IFI44L expression impairs virus production and that IFI44L expression negatively modulates the antiviral state induced by an analog of dsRNA or by IFN treatment. IFI44L binds to the cellular protein FKBP5, which in turn interacts with kinases essential for type I and III IFN induction and signaling, such as the kinases IKKα, IKKβ, and IKKε. IFI44L binding to FKBP5 decreased the phosphorylation of IRF-3 and IκBα mediated by IKKε and IKKβ, respectively, providing an explanation for the function of IFI44L in negatively modulating IFN responses. Therefore, IFI44L is a candidate target for reducing virus replication." @default.
• W2969658635 created "2019-08-29" @default.
• W2969658635 creator A5041614943 @default.
• W2969658635 creator A5065326739 @default.
• W2969658635 creator A5066719132 @default.
• W2969658635 date "2019-11-01" @default.
• W2969658635 modified "2023-10-18" @default.
• W2969658635 title "Novel Functions of IFI44L as a Feedback Regulator of Host Antiviral Responses" @default.
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• W2969658635 doi "https://doi.org/10.1128/jvi.01159-19" @default.
• W2969658635 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6803278" @default.
• W2969658635 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31434731" @default.
• W2969658635 hasPublicationYear "2019" @default.
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