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Yeast-surface expressed BVDV E2 protein induces a Th1/Th2 response in naïve T cells.

Patterson, R; Nerren, J; Kogut, M; Court, P; Villarreal-Ramos, B; Seyfert, HM; Dalby, P; (2012) Yeast-surface expressed BVDV E2 protein induces a Th1/Th2 response in naïve T cells. Developmental & Comparative Immunology , 37 (1) 107 - 114. 10.1016/j.dci.2011.10.009. Green open access

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Abstract

Yeast species such as Saccharomyces cerevisiae are known to be potent activators of the immune system. S. cerevisiae activates the innate immune system by engaging pattern recognition receptors such as toll like receptor 2 (TLR2) and dectin-1. In the current project, we express the immunogenic envelope protein E2 of bovine viral diarrhoea virus (BVDV) on the surface of S. cerevisiae. After successful expression, components of the innate and adaptive immune response induced by the recombinant S. cerevisiaein vitro were analysed to determine if expression in yeast enhances the immunogenicity of the viral protein. Recombinant S. cerevisiae stimulated production of the chemokine CXCL-8 in primary bovine macrophages, but did no stimulate production of reactive oxygen species (ROS) in the same cells. Additionally, bovine macrophages primed with S. cerevisiae expressing viral envelope proteins had a greater capacity for stimulating proliferation of CD4+ T-cells from BVDV-free animals compared to macrophages primed with envelope protein alone or S. cerevisiae without envelope protein expression. Heat inactivation of recombinant S. cerevisiae increased ROS production and capacity to stimulate CD4+ T-cells in macrophages but did not alter CXCL-8 release compared to the live counter-part. Additionally, heat-inactivation of recombinant S. cerevisiae induced less INFγ and IL-4 but equal amounts of IL-10 compared to live yeast T-cell cultures. Our studies demonstrate a use for S. cerevisiae as a vehicle for transporting BVDV vaccine antigen to antigen-presenting cell in order to elicit cell-mediated immunity even in naïve animals.

Type: Article
Title: Yeast-surface expressed BVDV E2 protein induces a Th1/Th2 response in naïve T cells.
Location: US
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.dci.2011.10.009
Publisher version: http://dx.doi.org/10.1016/j.dci.2011.10.009
Language: English
Additional information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Keywords: Animals, Cattle, Cell Proliferation, Cells, Cultured, Diarrhea Viruses, Bovine Viral, Interferon-gamma, Interleukin-4, Interleukin-8, Macrophages, Male, Membrane Proteins, Organisms, Genetically Modified, Reactive Oxygen Species, Recombinant Proteins, Saccharomyces cerevisiae, Th1 Cells, Th2 Cells, Vaccines, Subunit, Viral Envelope Proteins, Viral Vaccines
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1331701
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