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Feola S, Capasso C, Fusciello M, Martins B, Tähtinen S, Medeot M, Carpi S, Frascaro F, Ylosmäki E, Peltonen K, Pastore L, Cerullo V. Oncolytic vaccines increase the response to PD-L1 blockade in immunogenic and poorly immunogenic tumors. Oncoimmunology 2018; 7:e1457596. [PMID: 30221051 DOI: 10.1080/2162402x.2018.1457596] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 03/16/2018] [Accepted: 03/22/2018] [Indexed: 12/31/2022] Open
Abstract
Activation of immune checkpoint pathways and limited T- cell infiltration result in immunological escape of tumors. Although immune checkpoint inhibitors are currently approved for several types of cancers, the response rate is often limited by the lack of tumor specific T-cells within the malignant tissue. Therefore, new combinatorial strategies are needed to enhance the clinical benefit of immune checkpoint inhibitors. We have previously developed PeptiCRAd, an oncolytic vaccine platform capable of directing the immune response toward tumor epitopes. In this study, we evaluated whether the platform could be used to increase the response rate to checkpoint inhibitors in both highly immunogenic and poorly immunogenic tumors, such as melanoma and triple negative breast cancer (TNBC). We report here that anti-PD-L1 therapy in combination with PeptiCRAd significantly reduced the growth of melanomas and increased the response rate to checkpoint inhibition. In fact, we registered a higher rate of complete responses among mice treated with the combination. This approach promoted the presence of non-exhausted antigen-specific T-cells within the tumor in comparison to anti-PD-L1 monotherapy. Furthermore, we found that targeting both MHC-I and II restricted tumor epitopes was necessary to decrease the growth of the poorly immunogenic TNBC model 4T1 and that combination with PD-L1 blockade increased the number of responders to checkpoint inhibition. Finally, the described strategy was validated in a translational in vitro model using HLA matched human PBMCs and tumor cell lines. Consistent to our previous results, improved cytotoxicity was observed with combination of PeptiCRAd and anti-PD-L1. These results demonstrate that oncolytic virus based cancer vaccine can significantly improve the response rate to checkpoint blocking antibodies in the context of immunogenic and non-immunogenic tumors.
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Affiliation(s)
- S Feola
- Dipartimento di medicina Molecolare e Biotecnologie Mediche, Universitá di Napoli Federico II, Via Pansini 5, Naples, Italy
| | - C Capasso
- Laboratory of Immunovirotherapy, Drug Research Doctoral Program, University of Helsinki, Helsinki, Finland
| | - M Fusciello
- Laboratory of Immunovirotherapy, Drug Research Doctoral Program, University of Helsinki, Helsinki, Finland
| | - B Martins
- Laboratory of Immunovirotherapy, Drug Research Doctoral Program, University of Helsinki, Helsinki, Finland
| | - S Tähtinen
- Laboratory of Immunovirotherapy, Drug Research Doctoral Program, University of Helsinki, Helsinki, Finland
| | - M Medeot
- Department of pharmaceutical and pharmacological sciences, University of Padova, Via F. Marzolo 5, Padova, Italy
| | - S Carpi
- Department of Pharmacy, University of Pisa, Lungarno Antonio Pacinotti, Pisa, Italy
| | - F Frascaro
- University of Siena, via Aldo Moro 2, Siena, Italy
| | - E Ylosmäki
- Laboratory of Immunovirotherapy, Drug Research Doctoral Program, University of Helsinki, Helsinki, Finland
| | - K Peltonen
- Laboratory of Immunovirotherapy, Drug Research Doctoral Program, University of Helsinki, Helsinki, Finland
| | - L Pastore
- Dipartimento di medicina Molecolare e Biotecnologie Mediche, Universitá di Napoli Federico II, Via Pansini 5, Naples, Italy.,Helsinki Institute of Life Science, HILIFE, University of Helsinki, Helsinki, Finland
| | - V Cerullo
- Laboratory of Immunovirotherapy, Drug Research Doctoral Program, University of Helsinki, Helsinki, Finland.,Helsinki Institute of Life Science, HILIFE, University of Helsinki, Helsinki, Finland.,CEINGE-Biotecnologie Avanzate, Naples, Italy
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Capasso C, Whalley T, Marwah V, Serafin A, Fusciello M, Feola S, Martins B, Greco D, Szomolay B, Cerullo V. Homology between cancer and viral epitopes as criteria to design improved cancer vaccines. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx711.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Capasso C, Frascaro F, Carpi S, Feola S, Tähtinen S, Fusciello M, Pesonen S, Ranki T, Ylösmäki E, Cerullo V. Improving the efficacy of PDL1 blockade by combination with oncolytic vaccines. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw525.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Capasso C, Magarkar A, Cervera Carrascon V, Müller M, Garofalo M, Kuryk L, Fusciello M, Ylösmäki E, Bunker A, Cerullo V. Enhanced anti-cancer vaccines with a new epitope improvement system. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw525.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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