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The adenylate cyclase toxin from Bordetella pertussis – a novel promising vehicle for antigen delivery to dendritic cells

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Bordetella pertussis secretes an adenylate cyclase toxin (CyaA or ACT) that targets primarily cells expressing the αMβ2 integrin (CD11b/CD18) receptor. This toxin can deliver its N-terminal catalytic AC domain (400 amino acid residues) into the cytosol directly across the cytoplasmic membrane. Various heterologous CD8+, as well as CD4+ T-cell epitopes have been engineered into genetically detoxified CyaA and the resulting toxoids were successfully used as vectors for delivery of inserted epitopes into antigen-presenting cells. Upon processing and presentation, these recombinant CyaAs trigger specific MHC class I and/or class II-restricted T-cell responses both in vitro and in vivo.

Document Type: Research Article


Affiliations: 1: Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic 2: Unité de Biologie des Régulations Immunitaires, INSERM E 0352, Institut Pasteur, Paris, France

Publication date: April 1, 2004


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