Virus replicon particles expressing porcine reproductive and respiratory syndrome virus proteins elicit immune priming but do not confer protection from viremia in pigs

Porcine reproductive and respiratory syndrome virus (PRRSV) is the causative agent of one of the most devastating and economically significant viral disease of pigs worldwide. The vaccines currently available on the market elicit only limited protection. Recombinant vesicular stomatitis virus (VSV)...

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Veröffentlicht in:Veterinary research (Paris) 2016-02, Vol.47 (33), p.33-33, Article 33
Hauptverfasser: Eck, Melanie, Durán, Margarita García, Ricklin, Meret E, Locher, Samira, Sarraseca, Javier, Rodríguez, María José, McCullough, Kenneth C, Summerfield, Artur, Zimmer, Gert, Ruggli, Nicolas
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container_end_page 33
container_issue 33
container_start_page 33
container_title Veterinary research (Paris)
container_volume 47
creator Eck, Melanie
Durán, Margarita García
Ricklin, Meret E
Locher, Samira
Sarraseca, Javier
Rodríguez, María José
McCullough, Kenneth C
Summerfield, Artur
Zimmer, Gert
Ruggli, Nicolas
description Porcine reproductive and respiratory syndrome virus (PRRSV) is the causative agent of one of the most devastating and economically significant viral disease of pigs worldwide. The vaccines currently available on the market elicit only limited protection. Recombinant vesicular stomatitis virus (VSV) replicon particles (VRP) have been used successfully to induce protection against influenza A virus (IAV) in chickens and bluetongue virus in sheep. In this study, VSV VRP expressing the PRRSV envelope proteins GP5, M, GP4, GP3, GP2 and the nucleocapsid protein N, individually or in combination, were generated and evaluated as a potential vector vaccine against PRRSV infection. High level expression of the recombinant PRRSV proteins was demonstrated in cell culture. However, none of the PRRSV antigens expressed from VRP, with the exception of the N protein, did induce any detectable antibody response in pigs before challenge infection with PRRSV. After challenge however, the antibody responses against GP5, GP4 and GP3 appeared in average 2 weeks earlier than in pigs vaccinated with the empty control VRP. No reduction of viremia was observed in the vaccinated group compared with the control group. When pigs were co-vaccinated with VRP expressing IAV antigens and VRP expressing PRRSV glycoproteins, only antibody responses to the IAV antigens were detectable. These data show that the VSV replicon vector can induce immune responses to heterologous proteins in pigs, but that the PRRSV envelope proteins expressed from VSV VRP are poorly immunogenic. Nevertheless, they prime the immune system for significantly earlier B-cell responses following PRRSV challenge infection.
doi_str_mv 10.1186/s13567-016-0318-0
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The vaccines currently available on the market elicit only limited protection. Recombinant vesicular stomatitis virus (VSV) replicon particles (VRP) have been used successfully to induce protection against influenza A virus (IAV) in chickens and bluetongue virus in sheep. In this study, VSV VRP expressing the PRRSV envelope proteins GP5, M, GP4, GP3, GP2 and the nucleocapsid protein N, individually or in combination, were generated and evaluated as a potential vector vaccine against PRRSV infection. High level expression of the recombinant PRRSV proteins was demonstrated in cell culture. However, none of the PRRSV antigens expressed from VRP, with the exception of the N protein, did induce any detectable antibody response in pigs before challenge infection with PRRSV. After challenge however, the antibody responses against GP5, GP4 and GP3 appeared in average 2 weeks earlier than in pigs vaccinated with the empty control VRP. 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subjects Animals
antibodies
antigens
B-lymphocytes
Bluetongue virus
cell culture
chickens
Development and progression
Genetic aspects
glycoproteins
Glycoproteins - metabolism
Immune response
Influenza A virus
Life Sciences
markets
Medical research
nucleocapsid proteins
Porcine reproductive and respiratory syndrome
Porcine Reproductive and Respiratory Syndrome - immunology
Porcine Reproductive and Respiratory Syndrome - prevention & control
Porcine Reproductive and Respiratory Syndrome - virology
Porcine reproductive and respiratory syndrome virus
Porcine respiratory and reproductive syndrome virus - immunology
Properties
protein synthesis
replicon
Replicon - immunology
sheep
Swine
vaccines
Vaccines, Synthetic - immunology
Vesiculovirus
Vesiculovirus - genetics
Vesiculovirus - immunology
Veterinary medicine
Viral proteins
Viral Proteins - metabolism
Viral Vaccines - immunology
viremia
Viremia - immunology
Viremia - prevention & control
Viremia - veterinary
Virion - immunology
Virulence (Microbiology)
viruses
title Virus replicon particles expressing porcine reproductive and respiratory syndrome virus proteins elicit immune priming but do not confer protection from viremia in pigs
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