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The use of equine influenza pseudotypes for serological screening

The use of equine influenza pseudotypes for serological screening

Scott, Simon, Molesti, Eleonora, Temperton, Nigel ORCID: 0000-0002-7978-3815, Ferrara, Francesca, Böttcher-Friebertshäuser, Eva and Daly, Janet (2012) The use of equine influenza pseudotypes for serological screening. Journal of Molecular and Genetic Medicine, 6. pp. 304-308. ISSN 1747-0862

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Abstract

Standard assays used for influenza serology present certain practical issues, such as inter-laboratory variability,
complex protocols and the necessity for handling certain virus strains in high biological containment facilities. In an attempt to address this, avian and human influenza HA pseudotyped retroviruses have been successfully employed in antibody neutralization assays. In this study we generated an equine influenza pseudotyped lentivirus for serological screening. This was achieved by co-transfection of HEK293T cells with plasmids expressing the haemagglutinin (HA) protein of an H3N8 subtype equine influenza virus strain, HIV gag-pol and firefly luciferase reporter genes and harvesting virus from supernatant. In order to produce infective pseudotype particles it was necessary to additionally co-transfect a plasmid encoding the TMPRSS2 endoprotease to cleave the HA. High titre pseudotype virus (PV) was then used in PV antibody neutralization assays (PVNAs) to successfully distinguish between vaccinated and non-vaccinated equines. The sera were also screened by single radial haemolysis (SRH) assay. There was a 65% correlation between the results of the two assays, with the PVNA assay appearing slightly more sensitive. Future work will extend the testing of the PVNA with a larger number of
serum samples to assess sensitivity/specificity, inter/intra-laboratory variability and to define a protective titre.

Item Type: Article
Additional Information: [1] Published online: 31 December 2012. [2] Citation: Scott, Simon, Molesti, Eleonora, Temperton, Nigel, Ferrara, Francesca, Böttcher-Friebertshäuser, Eva and Daly, Janet (2012) The use of equine influenza pseudotypes for serological screening. Journal of Molecular and Genetic Medicine, 6. pp. 304-308. ISSN 1747-0862. [3] Copyright: The Author(s). Published by Library Publishing Media This is an open access article, published under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5). This license permits non-commercial use, distribution and reproduction of the article, provided the original work is appropriately acknowledged with correct citation details.
Uncontrolled Keywords: pseudotype virus, neutralizing antibody, H3N8, SRH, TMPRSS2
Subjects: R Medicine > RS Pharmacy and materia medica
Faculty / Department / Research Group: Faculty of Engineering & Science > Medway School of Pharmacy
Related URLs:
Last Modified: 29 Apr 2016 18:21
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/9578

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