Cited by 29Immunotherapy and Immune ResponsesVirus-based gene therapy researchPoxvirus research and outbreaks

Innate Immune Responses to Chimpanzee Adenovirus Vector 155 Vaccination in Mice and Monkeys

Open access
Collignon, Catherine, Bol, Vanesa, Chalon, Aurélie, Surendran, Naveen, Morel, Sandra, van den Berg, Robert A., Capone, Stefania, Bechtold, Viviane +1 more·2020·Frontiers in Immunology

Abstract

Replication-deficient chimpanzee adenovirus (ChAd) vectors represent an attractive vaccine platform and are thus employed as vaccine candidates against several infectious diseases. Since inducing effective immunity depends on the interplay between innate and adaptive immunity, a deeper understanding of innate immune responses elicited by intramuscularly injected ChAd vectors in tissues can advance the platform’s development. Using different candidate vaccines based on the Group C ChAd type 155 (ChAd155) vector, we characterized early immune responses in injected muscles and draining lymph nodes (dLNs) from mice, and complemented these analyses by evaluating cytokine responses and gene expression patterns in peripheral blood from ChAd155-injected macaques. In mice, vector DNA levels gradually decreased post-immunization, but local transgene mRNA expression exhibited two transient peaks [at 6 h and Day (D)5], which were most obvious in dLNs. This dynamic pattern was mirrored by the innate responses in tissues, which developed as early as 1–3 h (cytokines/chemokines) or D1 (immune cells) post-vaccination. They were characterized by a CCL2- and CXCL9/10-dominated chemokine profile, peaking at 6 h (with CXCL10/CCL2 signals also detectable in serum) and D7, and clear immune-cell infiltration peaks at D1/D2 and D6/D7. Experiments with a green fluorescent protein-expressing ChAd155 vector revealed infiltrating hematopoietic cell subsets at the injection site. Cell infiltrates comprised mostly monocytes in muscles, and NK cells, T cells, dendritic cells, monocytes, and B cells in dLNs. Similar bimodal dynamics were observed in whole-blood gene signatures in macaques: most of the 17 enriched immune/innate signaling pathways were significantly upregulated at D1 and D7 and downregulated at D3, and clustering analysis revealed stronger similarities between D1 and D7 signatures versus the D3 signature. Serum cytokine responses (CXCL10, IL1Ra, and low-level IFN-α) in macaques were predominantly observed at D1. Altogether, the early immune responses exhibited bimodal kinetics with transient peaks at D1/D2 and D6/D7, mostly with an IFN-associated signature, and these features were remarkably consistent across most analyzed parameters in murine tissues and macaque blood. These compelling observations reveal a novel aspect of the dynamics of innate immunity induced by ChAd155-vectored vaccines, and contribute to ongoing research to better understand how adenovectors can promote vaccine-induced immunity.

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  • BNT162b2, mRNA-1273, and ChAdOx1 nCoV-19 have been shown to induce type I interferon.

    “Both BNT162b2 and mRNA-1273, as well as the adenoviral-vectored vaccine ChAdOx1 nCoV-19, have been shown to induce type I interferon, thus potentially inducing pathogen-agnostic protection75–77.”

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  1. [11]Tapia MD Sow SO Mbaye KD Thiongane A Ndiaye BP Ndour CT Safety, Reactogenicity, and Immunogenicity of a Chimpanzee Adenovirus Vectored Ebola Vaccine in Children in Africa: a Randomised, Observer-Blind, Placebo-Controlled, Phase 2 Trial. Lancet Infect Dis (2020) 20(6): 719–30. 10.1016/S1473-3099(20)30019-0 32199492 · DOI

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Authors
Collignon, C., Bol, V., Chalon, A., Surendran, N., Morel, S., van den Berg, R. A., Capone, S., Bechtold, V., & Temmerman, S. T.
Affiliations
  • GlaxoSmithKline (Belgium) (BE)
  • GlaxoSmithKline (United States) (US)
Corresponding author
Temmerman, Stéphane T.
Venue
Frontiers in Immunology
Published
2020-11-30
Volume
11
Pages
579872-579872
ISSN
1664-3224 (ISSN-L)
OpenAlex
W3109164312
Cited by
29
References
45
Citations by year
2026: 2 · 2025: 4 · 2024: 3 · 2023: 6 · 2022: 10 · 2021: 4
FWCI
1.75
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Immunology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
GlaxoSmithKline
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Immunology and Microbiology › Virology › Poxvirus research and outbreaks
Keywords
vaccine adjuvants, innate immune response, chemokine profile, MCP-1, CXCL10, CXCL9, draining lymph nodes, intramuscular injection, immune cell infiltration, interferon signaling, macaque, mice
MeSH terms
Adenoviridae, Animals, Pan troglodytes, Female, Genetic Vectors, Immunity, Cellular, Immunity, Innate, Injections, Intramuscular, Interferons, Mice, Inbred C57BL, Vaccination, Vaccines, Cytokines, Chemokines, Mice

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