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A novel tumor-targeted interferon-α/-β receptor 1 antagonist increases replication of oncolytic vesicular stomatitis virus in a mouse mesothelioma model

Type I Interferons (IFN-I) are cytokines with pleiotropic activities involved in antiviral and antitumor immune responses. They can reduce oncolytic virus replication in tumor cells by inducing expression of interferon stimulated genes (ISG) with antiviral functions. To specifically neutralize the IFN-/-{beta} receptor (IFNAR) on specific cell types, we created novel IFNAR1-targeted antagonists constituted of a high-affinity nanobody targeting a specific cell surface marker conjugated to a...

bioRxiv 7d ago

Finding the Goldilocks zone: Modulating glycoprotein cleavage and fusogenicity optimizes the efficacy of a candidate Crimean-Congo hemorrhagic fever virus vaccine

Crimean-Congo hemorrhagic fever virus (CCHFV) is the etiologic agent of a lethal hemorrhagic disease spread by ticks throughout Europe, the Middle East, Africa and Asia. The lack of approved medical countermeasures and fundamental understanding of molecular mechanisms of viral assembly and egress have thus far curtailed disease prevention. Here, we identify and characterize key residues within the viral glycoprotein through forward and reverse genetics for vesicular stomatitis virus...

bioRxiv 1d ago

Tracing the Evolutionary Origin of Interferon to Basal Chordates and Unveiling Its Antiviral Functionality in Jawless Vertebrates

Interferons (IFNs) are essential mediators of antiviral defense in vertebrates, having gradually replaced the RNA interference (RNAi) antiviral mechanism that predominates in invertebrates and plants. To date, IFNs have been identified exclusively in jawed vertebrates, leaving the origin of IFN-based antiviral mechanisms largely mysterious. In this study, by conducting a genome-wide screening of IFN homologs accross various species, we successfully identified seveal IFN homologs from agnatha...

bioRxiv 7d ago