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© Research
Publication : Journal of immunology (Baltimore, Md. : 1950)

Therapy of murine tumors with recombinant Bordetella pertussis adenylate cyclase carrying a cytotoxic T cell epitope

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of immunology (Baltimore, Md. : 1950) - 01 Apr 1999

Fayolle C, Ladant D, Karimova G, Ullmann A, Leclerc C

Link to Pubmed [PMID] – 10201941

J. Immunol. 1999 Apr;162(7):4157-62

Bordetella pertussis secretes an invasive adenylate cyclase toxin, CyaA, that is able to deliver its N-terminal catalytic domain into the cytosol of eukaryotic target cells directly through the cytoplasmic membrane. We have shown previously that recombinant CyaA can be used to deliver viral CD8+ T cell epitopes to the MHC-class I presentation pathway to trigger specific CTL responses in vivo. In the present study, we show that mice immunized with a detoxified but still invasive CyaA carrying a CD8+ T cell epitope of OVA developed strong epitope-specific CTL responses, which kill tumor cells expressing this Ag. Treating mice with this recombinant molecule after the graft of melanoma cells expressing OVA induced a strong survival advantage compared with control animals. To our knowledge, this study represents the first demonstration that a nonreplicative and nontoxic vector carrying a single CTL epitope can stimulate efficient protective and therapeutic antitumor immunity.

http://www.ncbi.nlm.nih.gov/pubmed/10201941