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Rapid and strong human CD8+ T cell responses to vaccination with peptide, IFA, and CpG oligodeoxynucleotide 7909

Open access
Daniel E. Speiser, Danielle Líénard, Nathalie Rufer, Verena Rubio‐Godoy, Donata Rimoldi, Ferdy J. Lejeune, Arthur Μ. Krieg, Jean‐Charles Cerottini, Pedro J. Romero·2005·Journal of Clinical Investigation

Abstract

The induction of potent CD8+ T cell responses by vaccines to fight microbes or tumors remains a major challenge, as many candidates for human vaccines have proved to be poorly immunogenic. Deoxycytidyl-deoxyguanosin oligodeoxynucleotides (CpG ODNs) trigger Toll-like receptor 9, resulting in dendritic cell maturation that can enhance immunogenicity of peptide-based vaccines in mice. We tested whether a synthetic ODN, CpG 7909, could improve human tumor antigen-specific CD8+ T cell responses. Eight HLA-A2+ melanoma patients received 4 monthly vaccinations of low-dose CpG 7909 mixed with melanoma antigen A (Melan-A; identical to MART-1) analog peptide and incomplete Freund's adjuvant. All patients exhibited rapid and strong antigen-specific T cell responses: the frequency of Melan-A-specific T cells reached over 3% of circulating CD8+ T cells. This was one order of magnitude higher than the frequency seen in 8 control patients treated similarly but without CpG and 1-3 orders of magnitude higher than that seen in previous studies with synthetic vaccines. The enhanced T cell populations consisted primarily of effector memory cells, which in part secreted IFN- and expressed granzyme B and perforin ex vivo. In vitro, T cell clones recognized and killed melanoma cells in an antigen-specific manner. Thus, CpG 7909 is an efficient vaccine adjuvant that promotes strong antigen-specific CD8+ T cell responses in humans.

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OpenAlex · 10.1172/jci200523373

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Metadata

Authors
Speiser, D. E., Líénard, D., Rufer, N., Rubio‐Godoy, V., Rimoldi, D., Lejeune, F. J., Krieg, A. Μ., Cerottini, J., & Romero, P. J.
Venue
Journal of Clinical Investigation
Publisher
American Society for Clinical Investigation
Published
2005-02-04
Volume
115
Issue
3
Pages
739-746
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2095224835
Cited by
640
References
7
FWCI
22.21
Type
journal article
Language
en
Open access
bronze

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The paper
Speiser, D. E., Líénard, D., Rufer, N., Rubio‐Godoy, V., Rimoldi, D., Lejeune, F. J., Krieg, A. Μ., Cerottini, J., & Romero, P. J. (2005). Rapid and strong human CD8+ T cell responses to vaccination with peptide, IFA, and CpG oligodeoxynucleotide 7909. Journal of Clinical Investigation. https://doi.org/10.1172/jci200523373

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.