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Porchia BFMM, Aps LRDMM, Moreno ACR, da Silva JR, Silva MDO, Sales NS, Alves RPDS, Rocha CRR, Silva MM, Rodrigues KB, Barros TB, Pagni RL, Souza PDC, Diniz MDO, Ferreira LCDS. Active immunization combined with cisplatin confers enhanced therapeutic protection and prevents relapses of HPV-induced tumors at different anatomical sites. Int J Biol Sci 2022; 18:15-29. [PMID: 34975315 PMCID: PMC8692155 DOI: 10.7150/ijbs.56644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 10/19/2021] [Indexed: 12/22/2022] Open
Abstract
The active immunotherapy concept relies on the use of vaccines that are capable of inducing antitumor immunity, reversion of the suppressive immunological environment, and long-term memory responses. Previously, antitumor vaccines based on a recombinant plasmid (pgDE7h) or a purified protein (gDE7) led to regression of early-established human papillomavirus (HPV)-associated tumors in a preclinical model. In this work, the anticancer vaccines were combined with cisplatin to treat HPV-induced tumors at advanced growth stages. The antitumor effects were evaluated in terms of tumor regression, induction of specific CD8+ T cells, and immune modulation of the tumor microenvironment. Acute toxicity induced by the treatment was measured by weight loss and histological alterations in the liver and kidneys. Our results revealed that the combination of cisplatin with either one of the tested immunotherapies (pgDE7h or gDE7) led to complete tumor regression in mice. Also, the combined treatment resulted in synergistic effects, particularly among mice immunized with gDE7, including activation of systemic and tumor-infiltrating E7-specific CD8+ T cells, tumor infiltration of macrophages and dendritic cells, and prevention of tumor relapses at different anatomical sites. Furthermore, the protocol allowed the reduction of cisplatin dosage and its intrinsic toxic effects, without reducing antitumor outcomes. These results expand our knowledge of active immunotherapy protocols and open perspectives for alternative treatments of HPV-associated tumors.
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Affiliation(s)
- Bruna Felício Milazzotto Maldonado Porchia
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil.,ImunoTera Soluções Terapêuticas Ltda
| | - Luana Raposo de Melo Moraes Aps
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil.,ImunoTera Soluções Terapêuticas Ltda
| | - Ana Carolina Ramos Moreno
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Jamile Ramos da Silva
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Mariângela de Oliveira Silva
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Natiely Silva Sales
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Rubens Prince Dos Santos Alves
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Clarissa Ribeiro Reily Rocha
- DNA Repair Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Matheus Molina Silva
- DNA Repair Laboratory, Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Karine Bitencourt Rodrigues
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Tácita Borges Barros
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Roberta Liberato Pagni
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Patrícia da Cruz Souza
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Mariana de Oliveira Diniz
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil.,ImunoTera Soluções Terapêuticas Ltda
| | - Luís Carlos de Souza Ferreira
- Vaccine Development Laboratory, Department of Microbiology, Biomedical Sciences Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
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