Viruses

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    Protocols in Current Issue
    Analysis of Functional Virus-generated PAMP RNAs Using IFNα/β ELISA Assay
    Authors:  Margit Mutso, Xiang Liu, Andres Merits and Suresh Mahalingam, date: 06/20/2019, view: 291, Q&A: 0
    [Abstract] Virus-generated PAMP RNAs are key factors that activate host immune response. The PAMP RNAs are therefore usually closely related with viral disease pathogenesis. Quantitative real time PCR is a conventional method to assess RNA. However, it cannot be used for detecting short dsRNAs generated by viral replicase. This protocol was established to ...
    Purification and Proteomic Analysis of Alphavirus Particles from Sindbis Virus Grown in Mammalian and Insect Cells
    Authors:  Raquel Hernandez, Trevor Glaros, Gabrielle Rizzo and Davis F. Ferreira, date: 05/20/2019, view: 476, Q&A: 0
    [Abstract] Current mass spectrometry (MS) methods and new instrumentation now allow for more accurate identification of proteins in low abundance than previous protein fractionation and identification methods. It was of interest if this method could serve to define the virus proteome of a membrane-containing virus. To evaluate the efficacy of mass spec to ...
    On-demand Labeling of SNAP-tagged Viral Protein for Pulse-Chase Imaging, Quench-Pulse-Chase Imaging, and Nanoscopy-based Inspection of Cell Lysates
    Authors:  Roland Remenyi, Raymond Li and Mark Harris, date: 02/20/2019, view: 1147, Q&A: 0
    [Abstract] Advanced labeling technologies allow researchers to study protein turnover inside intact cells and to track the labeled protein in downstream applications. In the context of a viral infection, the combination of imaging and fluorescent labeling of viral proteins sheds light on their biological activity and interaction with the host cell. Initial ...
    Analysis of the Effect of Sphingomyelinase on Rubella Virus Infectivity in Two Cell Lines
    Authors:  Noriyuki Otsuki, Masafumi Sakata, Yoshio Mori, Kiyoko Okamoto and Makoto Takeda, date: 09/05/2018, view: 1167, Q&A: 0
    [Abstract] Rubella is a mildly contagious disease characterized by low-grade fever and a morbilliform rash caused by the rubella virus (RuV). Viruses often use cellular phospholipids for infection. We studied the roles of cellular sphingomyelin in RuV infection. Treatment of cells with sphingomyelinase (SMase) inhibited RuV infection in rabbit kidney-derived ...
    Liposome Flotation Assay for Studying Interactions Between Rubella Virus Particles and Lipid Membranes
    Authors:  Kyoko Saito, Noriyuki Otsuki, Makoto Takeda and Kentaro Hanada, date: 08/20/2018, view: 2174, Q&A: 0
    [Abstract] Rubella virus (RuV) is an enveloped, positive-sense single-stranded RNA virus that is pathogenic to humans. RuV binds to the target cell via the viral envelope protein E1, but the specific receptor molecules on the target cell are yet to be fully elucidated. Here, we describe a protocol for liposome flotation assay to study direct interactions ...
    Alphavirus Purification Using Low-speed Spin Centrifugation
    Authors:  Vamseedhar Rayaprolu, Jolene Ramsey, Joseph Che-Yen Wang and Suchetana Mukhopadhyay, date: 03/20/2018, view: 3096, Q&A: 2
    [Abstract] Chemical and sedimentation procedures are used to purify virus particles. While these approaches are successful for wild-type viruses, they are often not feasible for purifying mutant viruses with assembly defects. We combined two published methods (Atasheva et al., 2013; Moller-Tank et al., 2013), to generate a protocol that ...
    Chikungunya ELISA Protocol
    Authors:  Caitlin Mattos Briggs, Amanda Piper and Raquel Hernandez, date: 02/20/2014, view: 6487, Q&A: 0
    [Abstract] This protocol will result in the accurate qualitative measurement of anti-Chikungunya virus antibody (Ab) from infected mouse tissue or serum. This assay was developed by Dr. Caitlin Briggs, Arbovax, Inc. Chikungunya is a BL3 agent and should be handled in a biosafety level 3 laboratory under BL3 conditions. This protocol was used in the ...



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