Publication

Heterologous Prime Boost Vaccination Induces Protective Melanoma-Specific CD8 T Cell Responses

Journal Paper/Review - Oct 10, 2020

Units
PubMed
Doi

Citation
Ring S, Królik M, Hartmann F, Schmidt E, Ali O, Ludewig B, Kochanek S, Flatz L. Heterologous Prime Boost Vaccination Induces Protective Melanoma-Specific CD8 T Cell Responses. Mol Ther Oncolytics 2020; 19:179-187.
Type
Journal Paper/Review (English)
Journal
Mol Ther Oncolytics 2020; 19
Publication Date
Oct 10, 2020
Issn Print
2372-7705
Pages
179-187
Brief description/objective

Cancer vaccination aims at inducing an adaptive immune response against tumor-derived antigens. In this study, we utilize recombinant human adenovirus serotype 5 (rAd5) and recombinant lymphocytic choriomeningitis virus (rLCMV)-based vectors expressing the melanocyte differentiation antigen gp100. In contrast to single or homologous vaccination, a heterologous prime boost vaccination starting with a rAd5-gp100 prime immunization followed by a rLCMV-gp100 boost injection induces a high magnitude of polyfunctional gp100-specific CD8 T cells. Our data indicate that an optimal T cell induction is dependent on the order and interval of the vaccinations. A prophylactic prime boost vaccination with rAd5- and rLCMV-gp100 protects mice from a B16.F10 melanoma challenge. In the therapeutic setting, combination of the vaccination with low-dose cyclophosphamide showed a synergistic effect and significantly delayed tumor growth. Our findings suggest that heterologous viral vector prime boost immunizations can mediate tumor control in a mouse melanoma model.