Myeloid Cells Orchestrate Systemic Immunosuppression, Impairing the Efficacy of Immunotherapy against HPV<sup>+</sup> Cancers.

Details

Serval ID
serval:BIB_04D464D7C6BB
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Myeloid Cells Orchestrate Systemic Immunosuppression, Impairing the Efficacy of Immunotherapy against HPV<sup>+</sup> Cancers.
Journal
Cancer immunology research
Author(s)
Galliverti G., Wullschleger S., Tichet M., Murugan D., Zangger N., Horton W., Korman A.J., Coussens L.M., Swartz M.A., Hanahan D.
ISSN
2326-6074 (Electronic)
ISSN-L
2326-6066
Publication state
Published
Issued date
01/2020
Peer-reviewed
Oui
Volume
8
Number
1
Pages
131-145
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
Cancers induced by human papillomaviruses (HPV) should be responsive to immunotherapy by virtue of expressing the immunogenic oncoproteins E6/E7. However, advanced forms of cervical cancer, driven by HPV, are poorly responsive to immune response-enhancing treatments involving therapeutic vaccination against these viral neoantigens. Leveraging a transgenic mouse model of HPV-derived cancers, K14HPV16/H2b, we demonstrated that a potent nanoparticle-based E7 vaccine, but not a conventional "liquid" vaccine, induced E7 tumor antigen-specific CD8 <sup>+</sup> T cells in cervical tumor-bearing mice. Vaccination alone or in combination with anti-PD-1/anti-CTLA4 did not elicit tumor regression nor increase CD8 <sup>+</sup> T cells in the tumor microenvironment (TME), suggesting the presence of immune-suppressive barriers. Patients with cervical cancer have poor dendritic cell functions, have weak cytotoxic lymphocyte responses, and demonstrate an accumulation of myeloid cells in the periphery. Here, we illustrated that myeloid cells in K14HPV16/H2b mice possess potent immunosuppressive activity toward antigen-presenting cells and CD8 <sup>+</sup> T cells, dampening antitumor immunity. These immune-inhibitory effects inhibited synergistic effects of combining our oncoprotein vaccine with immune checkpoint-blocking antibodies. Our data highlighted a link between HPV-induced cancers, systemic amplification of myeloid cells, and the detrimental effects of myeloid cells on CD8 <sup>+</sup> T-cell activation and recruitment into the TME. These results established immunosuppressive myeloid cells in lymphoid organs as an HPV <sup>+</sup> cancer-induced means of circumventing tumor immunity that will require targeted abrogation to enable the induction of efficacious antitumor immune responses.
Keywords
Animals, Antineoplastic Agents, Immunological/pharmacology, CD8-Positive T-Lymphocytes/immunology, CTLA-4 Antigen/antagonists & inhibitors, Disease Models, Animal, Drug Synergism, Female, Humans, Immunosuppression, Immunotherapy/methods, Mice, Myeloid Cells/drug effects, Myeloid Cells/immunology, Nanoparticles/administration & dosage, Papillomaviridae/immunology, Papillomavirus E7 Proteins/immunology, Papillomavirus E7 Proteins/metabolism, Papillomavirus Infections/drug therapy, Papillomavirus Infections/immunology, Papillomavirus Infections/virology, Papillomavirus Vaccines/administration & dosage, Papillomavirus Vaccines/immunology, Programmed Cell Death 1 Receptor/antagonists & inhibitors, Tumor Microenvironment, Uterine Cervical Neoplasms/drug therapy, Uterine Cervical Neoplasms/immunology, Uterine Cervical Neoplasms/pathology, Uterine Cervical Neoplasms/virology
Pubmed
Web of science
Open Access
Yes
Create date
19/10/2020 8:23
Last modification date
28/10/2020 6:26
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