Cited by 36Immunotherapy and Immune ResponsesT-cell and B-cell ImmunologyRNA Interference and Gene Delivery

Ex vivo induction of viral antigen-specific CD8+ T cell responses using mRNA-electroporated CD40-activated B cells

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Van den Bosch, G A, Ponsaerts, P, Nijs, G, Lenjou, M, Vanham, G, Van Bockstaele, D R, Berneman, Z N, Van Tendeloo, V F I·2005·Clinical and Experimental Immunology

Abstract

Summary: Cell-based immunotherapy, in which antigen-loaded antigen-presenting cells (APC) are used to elicit T cell responses, has become part of the search for alternative cancer and infectious disease treatments. Here, we report on the feasibility of using mRNA-electroporated CD40-activated B cells (CD40-B cells) as alternative APC for the ex vivo induction of antigen-specific CD8+ T cell responses. The potential of CD40-B cells as APC is reflected in their phenotypic analysis, showing a polyclonal, strongly activated B cell population with high expression of MHC and co-stimulatory molecules. Flow cytometric analysis of EGFP expression 24 h after EGFP mRNA-electroporation showed that CD40-B cells can be RNA transfected with high gene transfer efficiency. No difference in transfection efficiency or postelectroporation viability was observed between CD40-B cells and monocyte-derived dendritic cells (DC). Our first series of experiments show clearly that peptide-pulsed CD40-B cells are able to (re)activate both CD8+ and CD4+ T cells against influenza and cytomegalovirus (CMV) antigens. To demonstrate the ability of viral antigen mRNA-electroporated CD40-B cells to induce virus-specific CD8+ T cell responses, these antigen-loaded cells were co-cultured in vitro with autologous peripheral blood mononuclear cells (PBMC) for 7 days followed by analysis of T cell antigen-specificity. These experiments show that CD40-B cells electroporated with influenza M1 mRNA or with CMV pp65 mRNA are able to activate antigen-specific interferon (IFN)-gamma-producing CD8+ T cells. These findings demonstrate that mRNA-electroporated CD40-B cells can be used as alternative APC for the induction of antigen-specific (memory) CD8+ T cell responses, which might overcome some of the drawbacks inherent to DC immunotherapy protocols.

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Authors
Van den Bosch, G. A., Ponsaerts, P., Nijs, G., Lenjou, M., Vanham, G., Van Bockstaele, D. R., Berneman, Z. N., & Van Tendeloo, V. F. I.
Affiliations
  • Laboratory of Experimental Hematology, Antwerp University Hospital (UZA), University of Antwerp (UA), Belgium
  • University of Antwerp (BE)
  • Instituut voor Tropische Geneeskunde (BE)
Venue
Clinical and Experimental Immunology
Published
2005-01-26
Volume
139
Issue
3
Pages
458-467
ISSN
  • 0009-9104 (ISSN-L)
  • 1365-2249
OpenAlex
W2094562987
Cited by
36
References
0
Citations by year
2026: 1 · 2023: 1 · 2022: 4 · 2021: 2 · 2019: 1 · 2018: 1 · 2015: 2 · 2014: 1 · 2013: 2
FWCI
1.89
Type
journal article
Language
en
Open access
Locations
  • Clinical & Experimental Immunology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ludwig Institute for Cancer Research
  • Vlaamse regering
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
mRNA electroporation, antigen-presenting cells, CD8+ T cell responses, dendritic cell immunotherapy, T cell activation, interferon-gamma, cellular immunotherapy, memory T cells
MeSH terms
Antigen-Presenting Cells, Antigens, Viral, B-Lymphocytes, Cell Line, Cytomegalovirus, Histocompatibility Testing, Humans, Lymphocyte Activation, RNA, Messenger, Immunotherapy, Adoptive, Electroporation, CD8-Positive T-Lymphocytes, Cell Culture Techniques, CD40 Antigens, Green Fluorescent Proteins

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