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Published in: Archives of Virology 4/2018

01-04-2018 | Original Article

IRES-based co-expression of influenza virus conserved genes can promote synergistic antiviral effects both in vitro and in vivo

Authors: Shadi Khodamoradi, Mohammad Shenagari, Masoumeh Tavasoti Kheiri, Farzaneh Sabahi, Abbas Jamali, Ahmad Heidari, Babak Ashrafkhani

Published in: Archives of Virology | Issue 4/2018

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Abstract

Vaccination is the most effective method for the prevention of influenza virus infection. Currently used influenza vaccines that target the highly polymorphic viral surface antigens can provide protection when well matched with circulating virus strains. Antigenic drift or cyclically occurring pandemics may hamper the efficacy of these vaccines, which are chosen prior to each flu season. Therefore, a universal vaccine, designed to induce broadly cross-protective immunity against the highly conserved internal antigens M1 and nucleoprotein could provide durable protection against various influenza virus subtypes, and it could also reduce the impact of pandemic influenza, which occurs less frequently. Here, we describe a new influenza vaccine candidate in which two highly conserved antigens, nucleoprotein (NP) and matrix (M1), are simultaneously expressed from a bicistronic vector termed pIRESM1/NP. Mice were immunized intradermally four times with the pIRESM1/NP construct. The protection efficacy of the gene-based vaccine was assessed by IFN-γ and Granzyme B ELISpot assays, follow-up observation of weight loss, and survival rates of the mice groups against lethal challenges with influenza A virus subtypes H1N1 and H5N1. The group that received pIRESM1/NP showed full protection against disease following lethal challenge with H1N1 and H5N1. This group also generated significantly higher host immune cellular responses than the other groups. These results demonstrate that a DNA vaccine strategy based on co-expression of the M1 and NP proteins could provide an effective way to control influenza virus infection.
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Metadata
Title
IRES-based co-expression of influenza virus conserved genes can promote synergistic antiviral effects both in vitro and in vivo
Authors
Shadi Khodamoradi
Mohammad Shenagari
Masoumeh Tavasoti Kheiri
Farzaneh Sabahi
Abbas Jamali
Ahmad Heidari
Babak Ashrafkhani
Publication date
01-04-2018
Publisher
Springer Vienna
Published in
Archives of Virology / Issue 4/2018
Print ISSN: 0304-8608
Electronic ISSN: 1432-8798
DOI
https://doi.org/10.1007/s00705-017-3682-9

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