Safety and immunogenicity of an FP9-vectored candidate tuberculosis vaccine (FP85A), alone and with candidate vaccine MVA85A in BCG-vaccinated healthy adults

Rowland, R. et al. (2013) Safety and immunogenicity of an FP9-vectored candidate tuberculosis vaccine (FP85A), alone and with candidate vaccine MVA85A in BCG-vaccinated healthy adults. Human Vaccines and Immunotherapeutics, 9(1), pp. 50-62. (doi:10.4161/hv.22464) (PMID:23143773) (PMCID:PMC3667946)

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Abstract

The safety and immunogenicity of a new candidate tuberculosis (TB) vaccine, FP85A was evaluated alone and in heterologous prime-boost regimes with another candidate TB vaccine, MVA85A. This was an open label, non-controlled, non-randomized Phase I clinical trial. Healthy previously BCG-vaccinated adult subjects were enrolled sequentially into three groups and vaccinated with FP85A alone, or both FP85A and MVA85A, with a four week interval between vaccinations. Passive and active data on adverse events were collected. Immunogenicity was evaluated by Enzyme Linked Immunospot (ELISpot), flow cytometry and Enzyme Linked Immunosorbent assay (ELISA). Most adverse events were mild and there were no vaccine-related serious adverse events. FP85A vaccination did not enhance antigen 85A-specific cellular immunity. When MVA85A vaccination was preceded by FP85A vaccination, cellular immune responses were lower compared with when MVA85A vaccination was the first immunisation. MVA85A vaccination, but not FP85A vaccination, induced anti-MVA IgG antibodies. Both MVA85A and FP85A vaccinations induced anti-FP9 IgG antibodies. In conclusion, FP85A vaccination was well tolerated but did not induce antigen-specific cellular immune responses. We hypothesize that FP85A induced anti-FP9 IgG antibodies with cross-reactivity for MVA85A, which may have mediated inhibition of the immune response to subsequent MVA85A. ClinicalTrials.gov identification number: NCT00653770

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Scott, Dr Janet
Authors: Rowland, R., Pathan, A. A., Satti, I., Poulton, I. D., Matsumiya, M. M. L., Whittaker, M., Minassian, A. M., O’Hara, G. A., Hamill, M., Scott, J. T., Harris, S. A., Poyntz, H. C., Bateman, C., Meyer, J., Williams, N., Gilbert, S. C., Lawrie, A. M., Hill, A. V.S., and McShane, H.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Human Vaccines and Immunotherapeutics
Publisher:Taylor & Francis
ISSN:2164-5515
ISSN (Online):2164-554X
Published Online:10 November 2012
Copyright Holders:Copyright © 2013 Landes Bioscience
First Published:First published in Human Vaccines and Immunotherapeutics 9(1): 50-62
Publisher Policy:Reproduced under a Creative Commons License

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