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Erschienen in: Cancer Immunology, Immunotherapy 8/2012

01.08.2012 | Focussed Research Review

TriVax-HPV: an improved peptide-based therapeutic vaccination strategy against human papillomavirus-induced cancers

verfasst von: Kelly Barrios, Esteban Celis

Erschienen in: Cancer Immunology, Immunotherapy | Ausgabe 8/2012

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Abstract

Background

Therapeutic vaccines for cancer are an attractive alternative to conventional therapies, since the later result in serious adverse effects and in most cases are not effective against advanced disease. Human papillomavirus (HPV) is responsible for several malignancies such as cervical carcinoma. Vaccines targeting oncogenic viral proteins like HPV16-E6 and HPV16-E7 are ideal candidates to elicit strong immune responses without generating autoimmunity because: (1) these products are not expressed in normal cells and (2) their expression is required to maintain the malignant phenotype. Our group has developed peptide vaccination strategy called TriVax, which is effective in generating vast numbers of antigen-specific T cells in mice capable of persisting for long time periods.

Materials and methods

We have used two HPV-induced mouse cancer models (TC-1 and C3.43) to evaluate the immunogenicity and therapeutic efficacy of TriVax prepared with the immunodominant CD8 T-cell epitope HPV16-E749-57, mixed with poly-IC adjuvant and costimulatory anti-CD40 antibodies.

Results

TriVax using HPV16-E749-57 induced large and persistent T-cell responses that were therapeutically effective against established HPV16-E7 expressing tumors. In most cases, TriVax was successful in attaining complete rejections of 6–11-day established tumors. In addition, TriVax induced long-term immunological memory, which prevented tumor recurrences. The anti-tumor effects of TriVax were independent of NK and CD4 T cells and, surprisingly, did not rely to a great extent on type-I or type-II interferon.

Conclusions

These findings indicate that the TriVax strategy is an appealing immunotherapeutic approach for the treatment of established viral-induced tumors. We believe that these studies may help to launch more effective and less invasive therapeutic vaccines for HPV-mediated malignancies.
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Metadaten
Titel
TriVax-HPV: an improved peptide-based therapeutic vaccination strategy against human papillomavirus-induced cancers
verfasst von
Kelly Barrios
Esteban Celis
Publikationsdatum
01.08.2012
Verlag
Springer-Verlag
Erschienen in
Cancer Immunology, Immunotherapy / Ausgabe 8/2012
Print ISSN: 0340-7004
Elektronische ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-012-1259-8

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