Abstract
Previously, we combined p19Arf (Cdkn2a, tumor suppressor protein) and interferon beta (IFN-β, immunomodulatory cytokine) gene transfer in order to enhance cell death in a murine model of melanoma. Here, we present evidence of the immune response induced when B16 cells succumbing to death due to treatment with p19Arf and IFN-β are applied in vaccine models. Use of dying cells for prophylactic vaccination was investigated, identifying conditions for tumor-free survival. After combined p19Arf and IFN-β treatment, we observed immune rejection at the vaccine site in immune competent and nude mice with normal NK activity, but not in NOD-SCID and dexamethasone immunosuppressed mice (NK deficient). Combined treatment induced IL-15, ULBP1, FAS/APO1 and KILLER/DR5 expression, providing a mechanism for NK activation. Prophylactic vaccination protected against tumor challenge, where markedly delayed progression and leukocyte infiltration were observed. Analysis of primed lymphocytes revealed secretion of TH1-related cytokines and depletion protocols showed that both CD4+ and CD8+ T lymphocytes are necessary for immune protection. However, application of this prophylactic vaccine where cells were treated either with IFN-β alone or combined with p19Arf conferred similar immune protection and cytokine activation, yet only the combination was associated with increased overall survival. In a therapeutic vaccine protocol, only the combination was associated with reduced tumor progression. Our results indicate that by harnessing cell death in an immunogenic context, our p19Arf and IFN-β combination offers a clear advantage when both genes are included in the vaccine and warrants further development as a novel immunotherapy for melanoma.
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Abbreviations
- Ad:
-
Adenovirus
- Arf:
-
Alternate reading frame
- CCL:
-
Chemokine (C–C motif) ligand
- CDKN2A:
-
Cyclin-dependent kinase inhibitor 2A
- CXCL:
-
Chemokine (C–X–C motif) ligand
- DEX:
-
Dexamethasone
- EPM-UNIFESP:
-
Escola Paulista de Medicina-Universidade Federal de São Paulo
- FAS/APO1:
-
Fas receptor/apoptosis antigen 1
- FMUSP:
-
Faculdade de Medicina-Universidade de São Paulo
- H60a:
-
Histocompatibility 60a
- ICESP:
-
Instituto do Câncer do Estado de São Paulo
- IU:
-
Infectious units
- KILLER/DR5:
-
KILLER/death receptor 5
- LUC:
-
Luciferase
- MDM2, 4:
-
Murine double minute 2, 4
- MOI:
-
Multiplicity of infection
- NOD-SCID:
-
Non-obese diabetic-severe combined immunodeficiency
- PG:
-
p53-responsive promoter
- PGTxβ:
-
p53-responsive promoter
- Raet 1d, e:
-
Retinoic acid early transcript 1d, e
- RGD:
-
Argenylglycylaspartic acid
- SEM:
-
Standard error of the mean
- TP53:
-
Tumor protein 53, p53
- ULBP1:
-
UL16-binding protein 1
- UNIFESP:
-
Universidade Federal de São Paulo
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Acknowledgments
We are grateful for the support of the laboratories of Drs. José Eduardo Krieger (Universidade de São Paulo-USP) and Roger Chammas (Universidade de São Paulo-USP). We thank Dr. Elaine Guadelupe Rodrigues (Universidade Federal de São Paulo- UNIFESP) for helpful discussions as well as Jonatan Ersching and Dr. Mauricio Martins Rodrigues (Universidade Federal de São Paulo- UNIFESP) for assistance with antibody production. We also thank Camila Morais Melo (Faculdade de Medicina da Universidade de São Paulo-FMUSP) for assistance in the immunochemistry assay. Sao Paulo Research Foundation grants (Strauss, B.E) 13/25167-5, 11/50911-4; fellowships (Medrano, R.F.V) 13/09474-5, (Ribeiro, A.H) 11/10656-5, (Catani, J.P.P) 14/11524-3.
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Medrano, R.F.V., Catani, J.P.P., Ribeiro, A.H. et al. Vaccination using melanoma cells treated with p19arf and interferon beta gene transfer in a mouse model: a novel combination for cancer immunotherapy. Cancer Immunol Immunother 65, 371–382 (2016). https://doi.org/10.1007/s00262-016-1807-8
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DOI: https://doi.org/10.1007/s00262-016-1807-8