Lücke, A.C.* ; Vom Hemdt, A.* ; Wieseler, J.* ; Fischer, C.* ; Feldmann, M.* ; Rothenfußer, S. ; Drexler, J.F.* ; Kümmerer, B.M.*
     
    
        
High-throughput platform for detection of neutralizing antibodies using flavivirus reporter replicon particles.
    
    
        
    
    
        
        Viruses 14:346 (2022)
    
    
    
      
      
	
	    Flavivirus outbreaks require fast and reliable diagnostics that can be easily adapted to newly emerging and re-emerging flaviviruses. Due to the serological cross-reactivity among fla-vivirus antibodies, neutralization tests (NT) are considered the gold standard for sero-diagnostics. Here, we first established wild-type single-round infectious virus replicon particles (VRPs) by packaging a yellow fever virus (YFV) replicon expressing Gaussia luciferase (Gluc) with YFV structural proteins in trans using a double subgenomic Sindbis virus (SINV) replicon. The latter expressed the YFV envelope proteins prME via the first SINV subgenomic promoter and the capsid protein via a second subgenomic SINV promoter. VRPs were produced upon co-electroporation of replicon and packaging RNA. Introduction of single restriction enzyme sites in the packaging construct flanking the prME sequence easily allowed to exchange the prME moiety resulting in chimeric VRPs that have the surface proteins of other flaviviruses including dengue virus 1-4, Zika virus, West Nile virus, and tick-borne encephalitis virus. Besides comparing the YF-VRP based NT assay to a YF reporter virus NT assay, we analyzed the neutralization efficiencies of different human anti-fla-vivirus sera or a monoclonal antibody against all established VRPs. The assays were performed in a 96-well high-throughput format setting with Gluc as readout in comparison to classical plaque reduction NTs indicating that the VRP-based NT assays are suitable for high-throughput analyses of neutralizing flavivirus antibodies.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        Diagnostics ; Flavivirus ; High-throughput ; Neutralization Assay ; Virus Replicon Particles; West-nile-virus; Zika Virus; Rna; Infection; Dengue; Cdna; Construction; Elements; Culture; Vaccine
    
 
    
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        Language
        english
    
 
    
        Publication Year
        2022
    
 
    
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        HGF-reported in Year
        2022
    
 
    
    
        ISSN (print) / ISBN
        1999-4915
    
 
    
        e-ISSN
        1999-4915
    
 
    
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	    Volume: 14,  
	    Issue: 2,  
	    Pages: ,  
	    Article Number: 346 
	    Supplement: ,  
	
    
 
    
        
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            Publisher
            MDPI
        
 
        
            Publishing Place
            St Alban-anlage 66, Ch-4052 Basel, Switzerland
        
 
	
        
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        Reviewing status
        Peer reviewed
    
 
    
        Institute(s)
        Unit for Clinical Pharmacology (KKG-EKLiP)
    
 
    
        POF-Topic(s)
        30203 - Molecular Targets and Therapies
    
 
    
        Research field(s)
        Immune Response and Infection
    
 
    
        PSP Element(s)
        G-522100-001
    
 
    
        Grants
        Deutsche Forschungsgemeinschaft (DFG, German Research foundation)
European Union's Horizon 2020 research and innovation program through the ZIKAlliance project
    
 
    
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        Erfassungsdatum
        2022-06-24