Evaluation of the immunogenicity of prime-boost vaccination with the replication-deficient viral vectored COVID-19 vaccine candidate ChAdOx1 nCoV-19

Simon P. Graham*, Rebecca K. McLean, Alexandra J. Spencer, Sandra Belij-Rammerstorfer, Daniel Wright, Marta Ulaszewska, Jane C. Edwards, Jack W.P. Hayes, Veronica Martini, Nazia Thakur, Carina Conceicao, Isabelle Dietrich, Holly Shelton, Ryan Waters, Anna Ludi, Ginette Wilsden, Clare Browning, Dagmara Bialy, Sushant Bhat, Phoebe Stevenson-LeggettPhilippa Hollinghurst, Ciaran Gilbride, David Pulido, Katy Moffat, Hannah Sharpe, Elizabeth Allen, Valerie Mioulet, Chris Chiu, Joseph Newman, Amin S. Asfor, Alison Burman, Sylvia Crossley, Jiandong Huo, Raymond J. Owens, Miles Carroll, John A. Hammond, Elma Tchilian, Dalan Bailey, Bryan Charleston, Sarah C. Gilbert, Tobias J. Tuthill, Teresa Lambe

*Corresponding author for this work

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Abstract

Clinical development of the COVID-19 vaccine candidate ChAdOx1 nCoV-19, a replication-deficient simian adenoviral vector expressing the full-length SARS-CoV-2 spike (S) protein was initiated in April 2020 following non-human primate studies using a single immunisation. Here, we compared the immunogenicity of one or two doses of ChAdOx1 nCoV-19 in both mice and pigs. Whilst a single dose induced antigen-specific antibody and T cells responses, a booster immunisation enhanced antibody responses, particularly in pigs, with a significant increase in SARS-CoV-2 neutralising titres.

Original languageEnglish
Article number69
Journalnpj Vaccines
Volume5
Issue number1
Early online date27 Jul 2020
DOIs
Publication statusPublished - 1 Dec 2020

Bibliographical note

Funding Information: This study was supported by UKRI Engineering and Physical Sciences Research Council (EPSRC) award EP/R013756/1 (VaxHub), UKRI Biotechnology and Biological Sciences Research Council (BBSRC) Institute Strategic Programme and Core Capability Grants to The Pirbright Institute (BBS/E/I/00007031, BBS/E/I/00007034, BBS/E/I/ 00007037 and BBS/E/I/00007039), and the Bill and Melinda Gates Foundation supported ‘Pirbright Livestock Antibody Hub’ (Grant No. OPP1215550). Development of SARS-CoV-2 reagents was partially supported by the NIAID Centers of Excellence for Influenza Research and Surveillance (CEIRS) contract HHSN272201400008C and EPSRC Grant No. EP/S025243/1 to the Rosalind Franklin Institute. A.L., G.W., C.B., A.B., and V.M. are supported by the UK Department for Environment Food & Rural Affairs. We thank V. Clark, H. Gray, and R. Snaith for animal husbandry and the Jenner Institute Vector Core Facility for assistance, and The Pirbright Institute Animal Services Team for animal care and provision of samples.

Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party
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Publisher Copyright: © The Author(s) 2020

Citation: Graham, S.P., McLean, R.K., Spencer, A.J. et al. Evaluation of the immunogenicity of prime-boost vaccination with the replication-deficient viral vectored COVID-19 vaccine candidate ChAdOx1 nCoV-19. npj Vaccines 5, 69 (2020).

DOI: https://doi.org/10.1038/s41541-020-00221-3

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