GFP co-expression reduces the A33R gene expression driven by a fowlpox vector in replication permissive and non-permissive cell lines.

Abstract:

:The development of an effective prophylactic vaccine is still necessary to improve the safety of the conventional although-discontinued smallpox vaccine, and to protect from the threat of deliberate release of variola virus. This need also arises from the number of new cases of animal orthopoxvirus infections each year, and to reduce the risk to animal handlers. Fowlpox (FP) recombinants only replicate in avian species and have been developed against human infectious diseases, as they can elicit an effective immune response, are not cross-reactive immunologically with vaccinia, and represent safer and more promising immunogens for immunocompromised individuals. The aim of this study was the characterisation of two new fowlpox recombinants expressing the A33R vaccinia virus gene either alone (FP(A33R)) or with the green fluorescent protein (FP(A33R-GFP)) to verify whether GFP can affect the expression of the transgene. The results show that both FP(A33R) and FP(A33R-GFP) can express A33R correctly, but A33R mRNA and protein synthesis are higher by FP(A33R) than by FP(A33R-GFP). Therefore, GFP co-expression does not prevent, but can reduce the level of a vaccine protein, and may affect the protective efficacy of the immune response.

journal_name

J Virol Methods

authors

Bissa M,Pacchioni SM,Zanotto C,De Giuli Morghen C,Radaelli A

doi

10.1016/j.jviromet.2012.09.009

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

172-6

issue

1

eissn

0166-0934

issn

1879-0984

pii

S0166-0934(12)00320-5

journal_volume

187

pub_type

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