TY - JOUR
T1 - A phase I trial evaluating the safety and immunogenicity of a candidate tuberculosis vaccination regimen, ChAdOx1 85A prime - MVA85A boost in healthy UK adults
AU - Wilkie, Morven
AU - Satti, Iman
AU - Minhinnick, Alice
AU - Harris, Stephanie
AU - Riste, Michael
AU - Ramon, Raquel Lopez
AU - Sheehan, Sharon
AU - Thomas, Zita-Rose Manjaly
AU - Wright, Daniel
AU - Stockdale, Lisa
AU - Hamidi, Ali
AU - O'Shea, Matthew K
AU - Dwivedi, Kritica
AU - Behrens, Hannah Michaela
AU - Davenne, Tamara
AU - Morton, Joshua
AU - Vermaak, Samantha
AU - Lawrie, Alison
AU - Moss, Paul
AU - McShane, Helen
N1 - Copyright © 2019 The Authors. Published by Elsevier Ltd.. All rights reserved.
PY - 2020/1/22
Y1 - 2020/1/22
N2 - BACKGROUND: This phase I trial evaluated the safety and immunogenicity of a candidate tuberculosis vaccination regimen, ChAdOx1 85A prime-MVA85A boost, previously demonstrated to be protective in animal studies, in healthy UK adults.METHODS: We enrolled 42 healthy, BCG-vaccinated adults into 4 groups: low dose Starter Group (n = 6; ChAdOx1 85A alone), high dose groups; Group A (n = 12; ChAdOx1 85A), Group B (n = 12; ChAdOx1 85A prime - MVA85A boost) or Group C (n = 12; ChAdOx1 85A - ChAdOx1 85A prime - MVA85A boost). Safety was determined by collection of solicited and unsolicited vaccine-related adverse events (AEs). Immunogenicity was measured by antigen-specific ex-vivo IFN-γ ELISpot, IgG serum ELISA, and antigen-specific intracellular IFN-γ, TNF-α, IL-2 and IL-17.RESULTS: AEs were mostly mild/moderate, with no Serious Adverse Events. ChAdOx1 85A induced Ag85A-specific ELISpot and intracellular cytokine CD4+ and CD8+ T cell responses, which were not boosted by a second dose, but were boosted with MVA85A. Polyfunctional CD4+ T cells (IFN-γ, TNF-α and IL-2) and IFN-γ+, TNF-α+ CD8+ T cells were induced by ChAdOx1 85A and boosted by MVA85A. ChAdOx1 85A induced serum Ag85A IgG responses which were boosted by MVA85A.CONCLUSION: A ChAdOx1 85A prime - MVA85A boost is well tolerated and immunogenic in healthy UK adults.
AB - BACKGROUND: This phase I trial evaluated the safety and immunogenicity of a candidate tuberculosis vaccination regimen, ChAdOx1 85A prime-MVA85A boost, previously demonstrated to be protective in animal studies, in healthy UK adults.METHODS: We enrolled 42 healthy, BCG-vaccinated adults into 4 groups: low dose Starter Group (n = 6; ChAdOx1 85A alone), high dose groups; Group A (n = 12; ChAdOx1 85A), Group B (n = 12; ChAdOx1 85A prime - MVA85A boost) or Group C (n = 12; ChAdOx1 85A - ChAdOx1 85A prime - MVA85A boost). Safety was determined by collection of solicited and unsolicited vaccine-related adverse events (AEs). Immunogenicity was measured by antigen-specific ex-vivo IFN-γ ELISpot, IgG serum ELISA, and antigen-specific intracellular IFN-γ, TNF-α, IL-2 and IL-17.RESULTS: AEs were mostly mild/moderate, with no Serious Adverse Events. ChAdOx1 85A induced Ag85A-specific ELISpot and intracellular cytokine CD4+ and CD8+ T cell responses, which were not boosted by a second dose, but were boosted with MVA85A. Polyfunctional CD4+ T cells (IFN-γ, TNF-α and IL-2) and IFN-γ+, TNF-α+ CD8+ T cells were induced by ChAdOx1 85A and boosted by MVA85A. ChAdOx1 85A induced serum Ag85A IgG responses which were boosted by MVA85A.CONCLUSION: A ChAdOx1 85A prime - MVA85A boost is well tolerated and immunogenic in healthy UK adults.
UR - http://www.scopus.com/inward/record.url?scp=85075435347&partnerID=8YFLogxK
U2 - 10.1016/j.vaccine.2019.10.102
DO - 10.1016/j.vaccine.2019.10.102
M3 - Article
C2 - 31735500
SN - 0264-410X
VL - 38
SP - 779
EP - 789
JO - Vaccine
JF - Vaccine
IS - 4
ER -