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Woo JK, Kim TG, Im NY, Son KY, Cho M, Jeong YJ, Hong JI, Kang B, Enkhtaivan G, Cho NH, Alain T, Park DG, Lee YS. Dual-Armed Oncolytic Myxoma Virus Encoding IFN-γ and CD47 Promotes Lymphocyte Infiltration and Tumor Suppression of Syngeneic Murine Melanoma. Cancers (Basel) 2023; 15:4703. [PMID: 37835397 PMCID: PMC10571683 DOI: 10.3390/cancers15194703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 09/18/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
Myxoma virus (MyxV) is a rabbit-specific poxvirus. However, its ability to selectively target tumor cells has established it as a safe and effective anticancer therapy. To strengthen its preclinical efficacy, transgenes that can prolong cancer cell infection and enhance anti-tumor effector functions are currently being investigated. We engineered MyxV armed with CD47, to turn on a 'do not eat me' signal within infected cells with actively replicating viruses, and with IFN-γ to further activate host immune anticancer responses. Tumor suppressive activities were significantly enhanced by the dual-armed MyxV_CD47/IFN-γ compared to parental MyxV or single-armed MyxV_CD47 or MyxV_IFN-γ. In addition, significant increases in IFN-γ+ CD8+T-cells and CD4+ T-cells populations within tumor-infiltrating lymphocytes (TIL) were observed after MyxV_CD47/IFN-γ treatment. Notably, all groups treated with MyxV showed a marked reduction in Foxp3+ CD4+ regulatory T-cells (Tregs) within TIL. We also show that MyxV infection induces PD-L1 up-regulation in cancer cells, and combinational treatment of MyxV with anti-mouse PD-L1 antibodies (αPD-L1) further controlled tumor burden and increased survival in the syngeneic melanoma model B16F10. Our data demonstrate that a CD47 and IFNγ dual-armed MyxV is an effective oncolytic viral immunotherapeutic. These findings strongly support further preclinical investigations to develop next-generation MyxV-based immunotherapy approaches.
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Affiliation(s)
- Jong Kyu Woo
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Tae-Geuk Kim
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Na Yeon Im
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Ka-Yeon Son
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Minhyeon Cho
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Yeo Jin Jeong
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Jeong-Im Hong
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - BoRim Kang
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Gansukh Enkhtaivan
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
| | - Nam-Hyuk Cho
- Department of Microbiology and Immunology, College of Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Tommy Alain
- Department of Biochemistry, Microbiology and Immunology, Children’s Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Dong Guk Park
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
- Department of Surgery, Dankook University Hospital, Cheonan 31116, Republic of Korea
| | - Yeon-Sook Lee
- ViroCure, #502, Ace TwinTower 1, 285 Digital-ro, Guro-gu, Seoul 08381, Republic of Korea
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Jazowiecka-Rakus J, Sochanik A, Hadryś A, Fidyk W, Chmielik E, Rahman MM, McFadden G. Combination of LIGHT (TNFSF14)-Armed Myxoma Virus Pre-Loaded into ADSCs and Gemcitabine in the Treatment of Experimental Orthotopic Murine Pancreatic Adenocarcinoma. Cancers (Basel) 2022; 14:2022. [PMID: 35454928 PMCID: PMC9027757 DOI: 10.3390/cancers14082022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/11/2022] [Accepted: 04/14/2022] [Indexed: 02/05/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a deadly neoplasm. Oncolytic viruses have tumorolytic and immune response-boosting effects and present great potential for PDAC management. We used LIGHT-armed myxoma virus (vMyx-LIGHT) loaded ex vivo into human adipose-derived mesenchymal stem cells (ADSCs) to evaluate murine PDAC treatment in conjunction with gemcitabine (GEM). The cytotoxicity of this treatment was confirmed in vitro using human and murine pancreatic cancer cell cultures, which were more sensitive to the combined approach and largely destroyed. Unlike cancer cells, ADSCs sustain significant viability after infection. The in vivo administration of vMyx-LIGHT-loaded ADSCs and gemcitabine was evaluated using immunocompetent mice with induced orthotopic PDAC lesions. The expression of virus-encoded LIGHT increased the influx of T cells to the tumor site. Shielded virus followed by gemcitabine improved tumor regression and survival. The addition of gemcitabine slightly compromised the adaptive immune response boost obtained with the shielded virus alone, conferring no survival benefit. ADSCs pre-loaded with vMyx-LIGHT allowed the effective transport of the oncolytic construct to PDAC lesions and yielded significant immune response; additional GEM administration failed to improve survival. In view of our results, the delivery of targeted/shielded virus in combination with TGF-β ablation and/or checkpoint inhibitors is a promising option to improve the therapeutic effects of vMyx-LIGHT/ADSCs against PDAC in vivo.
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Affiliation(s)
- Joanna Jazowiecka-Rakus
- Center for Translational Research and Molecular Biology of Cancer, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, Wybrzeże AK 15, 44-102 Gliwice, Poland; (A.S.); (A.H.)
| | - Aleksander Sochanik
- Center for Translational Research and Molecular Biology of Cancer, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, Wybrzeże AK 15, 44-102 Gliwice, Poland; (A.S.); (A.H.)
| | - Agata Hadryś
- Center for Translational Research and Molecular Biology of Cancer, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, Wybrzeże AK 15, 44-102 Gliwice, Poland; (A.S.); (A.H.)
| | - Wojciech Fidyk
- Department of Bone Marrow Transplantation and Hematology-Oncology, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, Wybrzeże AK 15, 44-102 Gliwice, Poland;
| | - Ewa Chmielik
- Tumor Pathology Department, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, Wybrzeże AK 15, 44-102 Gliwice, Poland;
| | - Masmudur M. Rahman
- Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA; (M.M.R.); (G.M.)
| | - Grant McFadden
- Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA; (M.M.R.); (G.M.)
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Myxoma Virus Expressing LIGHT (TNFSF14) Pre-Loaded into Adipose-Derived Mesenchymal Stem Cells Is Effective Treatment for Murine Pancreatic Adenocarcinoma. Cancers (Basel) 2021; 13:cancers13061394. [PMID: 33808692 PMCID: PMC8003548 DOI: 10.3390/cancers13061394] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/17/2021] [Accepted: 03/17/2021] [Indexed: 11/17/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a weakly immunogenic fatal neoplasm. Oncolytic viruses with dual anti-cancer properties-oncolytic and immune response-boosting effects-have great potential for PDAC management. Adipose-derived stem cells (ADSCs) of mesenchymal origin were infected ex vivo with recombinant myxoma virus (MYXV), which encodes murine LIGHT, also called tumor necrosis factor ligand superfamily member 14 (TNFSF14). The viability and proliferation of ADSCs were not remarkably decreased (1-2 days) following MYXV infection, in sharp contrast to cells of pancreatic carcinoma lines studied, which were rapidly killed by the infection. Comparison of the intraperitoneal (IP) vs. the intravenous (IV) route of ADSC/MYXV administration revealed more pancreas-targeted distribution of the virus when ADSCs were delivered IP to mice bearing orthotopically injected PDAC. The biodistribution, tumor burden reduction and anti-tumor adaptive immune response were examined. Bioluminescence data, used to assess the presence of the luciferase-tagged virus after IP injection, indicated enhanced trafficking into the pancreata of mice bearing orthotopically-induced PDAC, as compared to tumor-free animals, resulting in extended survival of the treated PDAC-seeded animals and in the boosted expression of key adaptive immune response markers. We conclude that ADSCs pre-loaded with transgene-armed MYXV and administered IP allow for the effective ferrying of the oncolytic virus to sites of PDAC and mediate improved tumor regression.
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