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Open AccessArticle

Immunogenicity and Efficacy of Zika Virus Envelope Domain III in DNA, Protein, and ChAdOx1 Adenoviral-Vectored Vaccines

1
The Jenner Institute, Nuffield Department of Medicine, University of Oxford, The Henry Wellcome Building for Molecular Physiology, Roosevelt Drive, Oxford OX3 7BN, UK
2
Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
3
MRC-University of Glasgow Centre for Virus Research, University of Glasgow, Glasgow G61 1QH, UK
4
Molecular Immunology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34149 Trieste, Italy
5
Public Health England, National Infection Service, Porton Down, Salisbury SP4 0JG, UK
6
Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
7
Dengue Haemorrhagic Fever Research Unit, Office for Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
8
Division of Medical Sciences, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK
*
Author to whom correspondence should be addressed.
Equal contribution.
Vaccines 2020, 8(2), 307; https://doi.org/10.3390/vaccines8020307
Received: 21 May 2020 / Revised: 9 June 2020 / Accepted: 11 June 2020 / Published: 16 June 2020
(This article belongs to the Special Issue Virus Immune Escape and Host Immune System)
The flavivirus envelope protein domain III (EDIII) was an effective immunogen against dengue virus (DENV) and other related flaviviruses. Whether this can be applied to the Zika virus (ZIKV) vaccinology remains an open question. Here, we tested the efficacy of ZIKV-EDIII against ZIKV infection, using several vaccine platforms that present the antigen in various ways. We provide data demonstrating that mice vaccinated with a ZIKV-EDIII as DNA or protein-based vaccines failed to raise fully neutralizing antibodies and did not control viremia, following a ZIKV challenge, despite eliciting robust antibody responses. Furthermore, we showed that ZIKV-EDIII encoded in replication-deficient Chimpanzee adenovirus (ChAdOx1-EDIII) elicited anti-ZIKV envelope antibodies in vaccinated mice but also provided limited protection against ZIKV in two physiologically different mouse challenge models. Taken together, our data indicate that contrary to what was shown for other flaviviruses like the dengue virus, which has close similarities with ZIKV-EDIII, this antigen might not be a suitable vaccine candidate for the correct induction of protective immune responses against ZIKV. View Full-Text
Keywords: ZIKV; DENV; EDIII; vaccine; adenovirus ZIKV; DENV; EDIII; vaccine; adenovirus
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López-Camacho, C.; De Lorenzo, G.; Slon-Campos, J.L.; Dowall, S.; Abbink, P.; Larocca, R.A.; Kim, Y.C.; Poggianella, M.; Graham, V.; Findlay-Wilson, S.; Rayner, E.; Carmichael, J.; Dejnirattisai, W.; Boyd, M.; Hewson, R.; Mongkolsapaya, J.; Screaton, G.R.; Barouch, D.H.; Burrone, O.R.; Patel, A.H.; Reyes-Sandoval, A. Immunogenicity and Efficacy of Zika Virus Envelope Domain III in DNA, Protein, and ChAdOx1 Adenoviral-Vectored Vaccines. Vaccines 2020, 8, 307.

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