Abstract
Baculovirus pseudotyped with vesicular stomatitis virus G protein (Bac-VSV-G) was found to efficiently transduce and express transgenes on mammalian cells. In this study, this recombinant virus was used for induction of anti-tumor immunity against murine telomerase reverse transcriptase (mTERT) and was compared with RNA-electroporated dendritic cells (DCs) in a murine glioma model. Splenocytes from the mice vaccinated with Bac-VSV-G expressing mTERT (Bac-VSVG-mTERT) showed significantly increased numbers of mTERT-specific IFN-γ-secreting T cells using an ELISPOT technique, and also showed increased NK cell activity. In addition, the TERT-specific T cells activated by Bac-VSVG-mTERT and mTERT RNA-electroporated DCs were predominantly CD4 + T cells and CD8 + T cells, respectively. The protective anti-tumor effect of Bac-VSVG-mTERT was similar to that of mTERT RNA-electroporated DCs. These results suggest that the pseudotype baculovirus expressing TERT may be a good candidate for a genetic vaccine for use in the treatment of malignant gliomas.
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