Abstract
Xenogeneic DNA vaccination can elicit tumor immunity through T cell and antibody-dependent effector mechanisms. Blockade of CTLA-4 engagement with B7 expressed on APCs has been shown to enhance T cell-dependent immunity. We investigated whether CTLA-4 blockade could increase T-cell responses and tumor immunity elicited by DNA vaccines. CTLA-4 blockade enhanced B16 tumor rejection in mice immunized against the melanoma differentiation antigens tyrosinase-related protein 2 and gp100, and this effect was stronger when anti-CTLA-4 was administered with booster vaccinations. CTLA-4 blockade also increased the T-cell responses to prostate-specific membrane antigen (PSMA) when given with the second or third vaccination. Based on these pre-clinical studies, we suggest that anti-CTLA-4 should be tested with xenogeneic DNA vaccines against cancer and that special attention should be given to sequence and schedule of administration.
Original language | English (US) |
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Pages (from-to) | 1700-1708 |
Number of pages | 9 |
Journal | Vaccine |
Volume | 22 |
Issue number | 13-14 |
DOIs | |
State | Published - Apr 16 2004 |
Externally published | Yes |
Keywords
- CTLA-4
- DNA vaccine
- Tumor immunity
ASJC Scopus subject areas
- Molecular Medicine
- General Immunology and Microbiology
- General Veterinary
- Public Health, Environmental and Occupational Health
- Infectious Diseases