Abstract
The potency of naked DNA vaccines is limited by their inability to amplify and spread in vivo. VP22, a HSV-1 protein, has demonstrated the remarkable property of intercellular transport and may thus provide a unique approach for enhancing vaccine potency. Therefore, we created a novel fusion of VP22 with a model Ag, human papillomavirus type 16 E7, in a DNA vaccine that generated enhanced spreading and MHC class I presentation of Ag. These properties led to a dramatic increase in the number of E7-specific CD8+ T cell precursors in vaccinated mice (around 50-fold) and converted a less effective DNA vaccine into one with significant potency against E7-expressing tumors. In comparison, nonspreading VP221-267 mutants failed to enhance vaccine potency. Our data indicated that the potency of DNA vaccines may be dramatically improved through intercellular spreading and enhanced MHC class I presentation of Ag.
Original language | English (US) |
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Pages (from-to) | 5733-5740 |
Number of pages | 8 |
Journal | Journal of Immunology |
Volume | 166 |
Issue number | 9 |
DOIs | |
State | Published - May 1 2001 |
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology