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Yarahmadi A, Zare M, Aghayari M, Afkhami H, Jafari GA. Therapeutic bacteria and viruses to combat cancer: double-edged sword in cancer therapy: new insights for future. Cell Commun Signal 2024; 22:239. [PMID: 38654309 PMCID: PMC11040964 DOI: 10.1186/s12964-024-01622-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 04/17/2024] [Indexed: 04/25/2024] Open
Abstract
Cancer, ranked as the second leading cause of mortality worldwide, leads to the death of approximately seven million people annually, establishing itself as one of the most significant health challenges globally. The discovery and identification of new anti-cancer drugs that kill or inactivate cancer cells without harming normal and healthy cells and reduce adverse effects on the immune system is a potential challenge in medicine and a fundamental goal in Many studies. Therapeutic bacteria and viruses have become a dual-faceted instrument in cancer therapy. They provide a promising avenue for cancer treatment, but at the same time, they also create significant obstacles and complications that contribute to cancer growth and development. This review article explores the role of bacteria and viruses in cancer treatment, examining their potential benefits and drawbacks. By amalgamating established knowledge and perspectives, this review offers an in-depth examination of the present research landscape within this domain and identifies avenues for future investigation.
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Affiliation(s)
- Aref Yarahmadi
- Department of Biology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran
| | - Mitra Zare
- Department of Microbiology, Faculty of Sciences, Kerman Branch, Islamic Azad University, Kerman, Iran
| | - Masoomeh Aghayari
- Department of Microbiology, Faculty of Sciences, Urmia Branch, Islamic Azad University, Urmia, Iran
| | - Hamed Afkhami
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran.
- Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran.
- Department of Medical Microbiology, Faculty of Medicine, Shahed University, Tehran, Iran.
| | - Gholam Ali Jafari
- Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran.
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2
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Mirbahari SN, Da Silva M, Zúñiga AIM, Kooshki Zamani N, St-Laurent G, Totonchi M, Azad T. Recent progress in combination therapy of oncolytic vaccinia virus. Front Immunol 2024; 15:1272351. [PMID: 38558795 PMCID: PMC10979700 DOI: 10.3389/fimmu.2024.1272351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 02/29/2024] [Indexed: 04/04/2024] Open
Abstract
In recent years, oncolytic viruses have emerged as promising agents for treating various cancers. An oncolytic virus is a non-pathogenic virus that, due to genetic manipulation, tends to replicate in and cause lysis of cancerous cells while leaving healthy cells unaffected. Among these viruses, vaccinia virus is an attractive platform for use as an oncolytic platform due to its 190 Kb genome with a high capacity for encoding therapeutic payloads. Combining oncolytic VV therapy with other conventional cancer treatments has been shown to be synergistic and more effective than monotherapies. Additionally, OVV can be used as a vector to deliver therapeutic payloads, alone or in combination with other treatments, to increase overall efficacy. Here, we present a comprehensive analysis of preclinical and clinical studies that have evaluated the efficacy of oncolytic vaccinia viruses in cancer immunotherapy. We discuss the outcomes of these studies, including tumor regression rates, overall survival benefits, and long-term responses. Moreover, we provide insights into the challenges and limitations associated with oncolytic vaccinia virus- based therapies, including immune evasion mechanisms, potential toxicities, and the development of resistance.
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Affiliation(s)
- Seyedeh Nasim Mirbahari
- Faculty of Sciences and Advanced Technologies in Biology, University of Science and Culture, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Miles Da Silva
- Department of Microbiology and Immunology, University of British Colombia, Vancouver, BC, Canada
- Ottawa Hospital Research Institute, The Ottawa Hospital, Ottawa, ON, Canada
| | - Abril Ixchel Muñoz Zúñiga
- Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, QC, Canada
- Centre de Recherche du CHUS, Sherbrooke, QC, Canada
| | - Nika Kooshki Zamani
- Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, QC, Canada
- Centre de Recherche du CHUS, Sherbrooke, QC, Canada
| | - Gabriel St-Laurent
- Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, QC, Canada
- Centre de Recherche du CHUS, Sherbrooke, QC, Canada
| | - Mehdi Totonchi
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Taha Azad
- Department of Microbiology and Infectious Diseases, Université de Sherbrooke, Sherbrooke, QC, Canada
- Centre de Recherche du CHUS, Sherbrooke, QC, Canada
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3
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Kane G, Lusi C, Brassil M, Atukorale P. Engineering approaches for innate immune-mediated tumor microenvironment remodeling. IMMUNO-ONCOLOGY TECHNOLOGY 2024; 21:100406. [PMID: 38213392 PMCID: PMC10777078 DOI: 10.1016/j.iotech.2023.100406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Cancer immunotherapy offers transformative promise particularly for the treatment of lethal cancers, since a correctly trained immune system can comprehensively orchestrate tumor clearance with no need for continued therapeutic intervention. Historically, the majority of immunotherapies have been T cell-focused and have included immune checkpoint inhibitors, chimeric antigen receptor T cells, and T-cell vaccines. Unfortunately T-cell-focused therapies have failed to achieve optimal efficacy in most solid tumors largely because of a highly immunosuppressed 'cold' or immune-excluded tumor microenvironment (TME). Recently, a rapidly growing treatment paradigm has emerged that focuses on activation of tumor-resident innate antigen-presenting cells, such as dendritic cells and macrophages, which can drive a proinflammatory immune response to remodel the TME from 'cold' or immune-excluded to 'hot'. Early strategies for TME remodeling centered on free cytokines and agonists, but these approaches have faced significant hurdles in both delivery and efficacy. Systemic toxicity from off-target inflammation is a paramount concern in these therapies. To address this critical gap, engineering approaches have provided the opportunity to add 'built-in' capabilities to cytokines, agonists, and other therapeutic agents to mediate improved delivery and efficacy. Such capabilities have included protective encapsulation to shield them from degradation, targeting to direct them with high specificity to tumors, and co-delivery strategies to harness synergistic proinflammatory pathways. Here, we review innate immune-mediated TME remodeling engineering approaches that focus on cytokines, innate immune agonists, immunogenic viruses, and cell-based methods, highlighting emerging preclinical approaches and strategies that are either being tested in clinical trials or already Food and Drug Administration approved.
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Affiliation(s)
- G.I. Kane
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst
- University of Massachusetts Cancer Center, Worcester
| | - C.F. Lusi
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst
- University of Massachusetts Cancer Center, Worcester
| | - M.L. Brassil
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst
- University of Massachusetts Cancer Center, Worcester
| | - P.U. Atukorale
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst
- University of Massachusetts Cancer Center, Worcester
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, USA
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4
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Higgins TA, Patton DJ, Shimko-Lofano IM, Eller TL, Molinari R, Sandey M, Ismail A, Smith BF, Agarwal P. The Development and Characterization of a Next-Generation Oncolytic Virus Armed with an Anti-PD-1 sdAb for Osteosarcoma Treatment In Vitro. Cells 2024; 13:351. [PMID: 38391964 PMCID: PMC10886739 DOI: 10.3390/cells13040351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/22/2024] [Accepted: 02/15/2024] [Indexed: 02/24/2024] Open
Abstract
Osteosarcoma (OS) is a primary bone malignancy characterized by an aggressive nature, limited treatment options, low survival rate, and poor patient prognosis. Conditionally replicative adenoviruses (CRAds) armed with immune checkpoint inhibitors hold great potential for enhanced therapeutic efficacy. The present study aims to investigate the anti-tumor efficacy of CAV2-AU-M2, a CAV2-based CRAd armed with an anti-PD-1 single-domain antibody (sdAb), against OS cell lines in vitro. The infection, conditional replication, cytopathic effects, and cytotoxicity of CAV2-AU-M2 were tested in four different OS cell lines in two-dimensional (2D) and three-dimensional (3D) cell cultures. CAV2-AU-M2 showed selective replication in the OS cells and induced efficient tumor cell lysis and death. Moreover, CAV2-AU-M2 produced an anti-PD-1 sdAb that demonstrated effective binding to the PD-1 receptors. This study demonstrated the first CRAd armed with an anti-PD-1 sdAb. This combined approach of two distinct immunotherapies is intended to enhance the anti-tumor immune response in the tumor microenvironment.
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Affiliation(s)
- Theresa A. Higgins
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
| | - Daniel J. Patton
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
| | - Isabella M. Shimko-Lofano
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
| | - Timothy L. Eller
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
| | - Roberto Molinari
- Department of Mathematics and Statistics, College of Sciences and Mathematics, Auburn University, Auburn, AL 36849, USA;
| | - Maninder Sandey
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA
| | - Aliaa Ismail
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
- Department of Pathology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 8366004, Egypt
| | - Bruce F. Smith
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA
| | - Payal Agarwal
- Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA; (T.A.H.); (D.J.P.); (I.M.S.-L.); (T.L.E.); (M.S.); (A.I.); (B.F.S.)
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA
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5
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Béguin J, Laloy E, Cochin S, Gantzer M, Farine I, Pichon C, Moreau B, Foloppe J, Balloul JM, Machon C, Guitton J, Tierny D, Klonjkowski B, Quéméneur E, Maurey C, Erbs P. Oncolytic virotherapy with intratumoral injection of vaccinia virus TG6002 and 5-fluorocytosine administration in dogs with malignant tumors. Mol Ther Oncolytics 2023; 30:103-116. [PMID: 37635744 PMCID: PMC10448017 DOI: 10.1016/j.omto.2023.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 07/17/2023] [Indexed: 08/29/2023] Open
Abstract
TG6002 is an oncolytic vaccinia virus expressing FCU1 protein, which converts 5-fluorocytosine into 5-fluorouracil. The study objectives were to assess tolerance, viral replication, 5-fluorouracil synthesis, and tumor microenvironment modifications to treatment in dogs with spontaneous malignant tumors. Thirteen dogs received one to three weekly intratumoral injections of TG6002 and 5-fluorocytosine. The viral genome was assessed in blood and tumor biopsies by qPCR. 5-Fluorouracil concentrations were measured in serum and tumor biopsies by liquid chromatography or high-resolution mass spectrometry. Histological and immunohistochemical analyses were performed. The viral genome was detected in blood (7/13) and tumor biopsies (4/11). Viral replication was suspected in 6/13 dogs. The median intratumoral concentration of 5-fluorouracil was 314 pg/mg. 5-Fluorouracil was not detected in the blood. An increase in necrosis (6/9) and a downregulation of intratumoral regulatory T lymphocytes (6/6) were observed. Viral replication, 5-fluorouracil synthesis, and tumor microenvironment changes were more frequently observed with higher TG6002 doses. This study confirmed the replicative properties, targeted chemotherapy synthesis, and reversion of the immunosuppressive tumor microenvironment in dogs with spontaneous malignant tumors treated with TG6002 and 5-fluorocytosine.
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Affiliation(s)
- Jérémy Béguin
- Transgene, 67405 Illkirch-Graffenstaden, France
- UMR Virologie, INRAE, École Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, 94700 Maisons-Alfort, France
- Department of Internal Medicine, École Nationale Vétérinaire d’Alfort, Université Paris-Est, 94700 Maisons-Alfort, France
| | - Eve Laloy
- UMR Virologie, INRAE, École Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, 94700 Maisons-Alfort, France
- Anatomical Pathology Unit, Biopôle, École Nationale Vétérinaire d’Alfort, Université Paris-Est, 94700 Maisons-Alfort, France
| | | | | | | | | | | | | | | | - Christelle Machon
- Service de Biochimie et pharmacotoxicologie, Hôpital Lyon-Sud, Hospices Civils de Lyon, 69310, France
| | - Jérôme Guitton
- Service de Biochimie et pharmacotoxicologie, Hôpital Lyon-Sud, Hospices Civils de Lyon, 69310, France
| | | | - Bernard Klonjkowski
- UMR Virologie, INRAE, École Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, 94700 Maisons-Alfort, France
| | | | - Christelle Maurey
- Department of Internal Medicine, École Nationale Vétérinaire d’Alfort, Université Paris-Est, 94700 Maisons-Alfort, France
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Babar Q, Saeed A, Tabish TA, Sarwar M, Thorat ND. Targeting the tumor microenvironment: Potential strategy for cancer therapeutics. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166746. [PMID: 37160171 DOI: 10.1016/j.bbadis.2023.166746] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/30/2023] [Accepted: 05/02/2023] [Indexed: 05/11/2023]
Abstract
Cellular and stromal components including tumor cells, immune cells, mesenchymal cells, cancer-linked fibroblasts, and extracellular matrix, constituent tumor microenvironment (TME). TME plays a crucial role in reprogramming tumor initiation, uncontrolled proliferation, invasion and metastasis as well as response to therapeutic modalities. In recent years targeting the TME has developed as a potential strategy for treatment of cancer because of its life-threatening functions in restricting tumor development and modulating responses to standard-of-care medicines. Cold atmospheric plasma, oncolytic viral therapy, bacterial therapy, nano-vaccine, and repurposed pharmaceuticals with combination therapy, antiangiogenic drugs, and immunotherapies are among the most effective therapies directed by TME that have either been clinically authorized or are currently being studied. This article discusses above-mentioned therapies in light of targeting TME. We also cover problems related to the TME-targeted therapies, as well as future insights and practical uses in this rapidly growing field.
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Affiliation(s)
- Quratulain Babar
- Department of Biochemistry Government College University, Faisalabad, Pakistan
| | - Ayesha Saeed
- Department of Biochemistry Government College University, Faisalabad, Pakistan
| | - Tanveer A Tabish
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 7BN, United Kingdom
| | - Mohsin Sarwar
- Department of Biochemistry University of Management and Technology, Lahore, Pakistan
| | - Nanasaheb D Thorat
- Department of Physics, Bernal Institute, Castletroy, Limerick V94T9PX, Ireland; Nuffield Department of Women's and Reproductive Health, John Radcliffe Hospital, Medical Sciences Division, University of Oxford, Oxford OX3 9DU, United Kingdom; Limerick Digital Cancer Research Centre (LDCRC) University of Limerick, Castletroy, Limerick V94T9PX, Ireland.
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Seclì L, Infante L, Nocchi L, De Lucia M, Cotugno G, Leoni G, Micarelli E, Garzia I, Avalle L, Sdruscia G, Troise F, Allocca S, Romano G, Scarselli E, D'Alise AM. Vector Aided Microenvironment programming (VAMP): reprogramming the TME with MVA virus expressing IL-12 for effective antitumor activity. J Immunother Cancer 2023; 11:jitc-2023-006718. [PMID: 37117006 PMCID: PMC10151998 DOI: 10.1136/jitc-2023-006718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2023] [Indexed: 04/30/2023] Open
Abstract
BACKGROUND Tumor microenvironment (TME) represents a critical hurdle in cancer immunotherapy, given its ability to suppress antitumor immunity. Several efforts are made to overcome this hostile TME with the development of new therapeutic strategies modifying TME to boost antitumor immunity. Among these, cytokine-based approaches have been pursued for their known immunomodulatory effects on different cell populations within the TME. IL-12 is a potent pro-inflammatory cytokine that demonstrates striking immune activation and tumor control but causes severe adverse effects when systemically administered. Thus, local administration is considered a potential strategy to achieve high cytokine concentrations at the tumor site while sparing systemic adverse effects. METHODS Modified Vaccinia Ankara (MVA) vector is a potent inducer of pro-inflammatory response. Here, we cloned IL-12 into the genome of MVA for intratumoral immunotherapy, combining the immunomodulatory properties of both the vector and the cargo. The antitumor activity of MVA-IL-12 and its effect on TME reprogramming were investigated in preclinical tumor models. RNA sequencing (RNA-Seq) analysis was performed to assess changes in the TME in treated and distal tumors and the effect on the intratumoral T-cell receptor repertoire. RESULTS Intratumoral injection of MVA-IL-12 resulted in strong antitumor activity with the complete remission of established tumors in multiple murine models, including those resistant to checkpoint inhibitors. The therapeutic activity of MVA-IL-12 was associated with very low levels of circulating cytokine. Effective TME reprogramming was demonstrated on treatment, with the reduction of immunosuppressive M2 macrophages while increasing pro-inflammatory M1, and recruitment of dendritic cells. TME switch from immunosuppressive into immunostimulatory environment allowed for CD8 T cells priming and expansion leading to tumor attack. CONCLUSIONS Intratumoral administration of MVA-IL-12 turns immunologically 'cold' tumors 'hot' and overcomes resistance to programmed cell death protein-1 blockade.
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Affiliation(s)
| | - Luigia Infante
- NousCom, Rome, Italy
- University of Rome Tor Vergata, Roma, Lazio, Italy
| | | | | | | | | | | | | | - Lidia Avalle
- Department of Molecular Biotechnology and Health Science, University of Turin, Torino, Piemonte, Italy
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Shen Y, Song W, Lin D, Zhang X, Wang M, Li Y, Yang Z, Guo S, Wang Z, Sheng J, Murad Y, Ding J, Lou Y, Pan X, Wu Z, Zhao R, Jia W, Bai X, Liang T. VG161 activates systemic antitumor immunity in pancreatic cancer models as a novel oncolytic herpesvirus expressing multiple immunomodulatory transgenes. J Med Virol 2023; 95:e28108. [PMID: 36042555 PMCID: PMC10087349 DOI: 10.1002/jmv.28108] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/23/2022] [Accepted: 08/27/2022] [Indexed: 01/11/2023]
Abstract
The VG161 represents the first recombinant oncolytic herpes simplex virus type 1 carrying multiple synergistic antitumor immuno-modulating factors. Here, we report its antitumor mechanisms and thus provide firm theoretical foundation for the upcoming clinical application in pancreatic cancer. Generally, the VG161-mediated antitumor outcomes were analyzed by a collaboration of techniques, namely the single-cell sequencing, airflow-assisted desorption electrospray ionization-mass spectrometry imaging (AFADSI-MSI) and nanostring techniques. In vitro, the efficacy of VG161 together with immune checkpoint inhibitors (ICIs) has been successfully shown to grant a long-term antitumor effect by altering tumor immunity and remodeling tumor microenvironment (TME) metabolisms. Cellular functional pathways and cell subtypes detected from patient samples before and after the treatment had undergone distinctive changes including upregulated CD8+ T and natural killer cells. More importantly, significant antitumor signals have emerged since the administration of VG161 injection. In conclusion, VG161 can systematically activate acquired and innate immunity in pancreatic models, as well as improve the tumor immune microenvironment, indicative of strong antitumor potential. The more robusting antitumor outcome for VG161 monotherapy or in combination with other therapies on pancreatic cancer is worth of being explored in further clinical trials.
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Affiliation(s)
- Yinan Shen
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital,Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wei Song
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Danni Lin
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital,Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaozhen Zhang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital,Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Meng Wang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital,Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuwei Li
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital,Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zifan Yang
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Sida Guo
- Center for Innovation & Translational Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zijun Wang
- Center for Innovation & Translational Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jianpeng Sheng
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yanal Murad
- Virogin Biotech Canada Ltd., Vancouver, British Columbia, Canada
| | - Jun Ding
- Shanghai Virogin Biotech Co. Ltd., Shanghai, China
| | - Yufeng Lou
- Center for Innovation & Translational Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xinping Pan
- CNBG-Virogin Biotech (Shanghai) Co. Ltd., Shanghai, China
| | - Zongsong Wu
- Shanghai Virogin Biotech Co. Ltd., Shanghai, China
| | - Ronghua Zhao
- Virogin Biotech Canada Ltd., Vancouver, British Columbia, Canada.,Shanghai Virogin Biotech Co. Ltd., Shanghai, China.,CNBG-Virogin Biotech (Shanghai) Co. Ltd., Shanghai, China
| | - Weiguo Jia
- Virogin Biotech Canada Ltd., Vancouver, British Columbia, Canada.,Shanghai Virogin Biotech Co. Ltd., Shanghai, China.,CNBG-Virogin Biotech (Shanghai) Co. Ltd., Shanghai, China
| | - Xueli Bai
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital,Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Tingbo Liang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital,Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Cousin S, Toulmonde M, Kind M, Guegan JP, Bessede A, Cantarel C, Bellera C, Italiano A. Phase 2 trial of intravenous oncolytic virus JX-594 combined with low-dose cyclophosphamide in patients with advanced breast cancer. Exp Hematol Oncol 2022; 11:104. [PMID: 36474303 PMCID: PMC9724410 DOI: 10.1186/s40164-022-00338-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 09/03/2022] [Indexed: 12/12/2022] Open
Abstract
Breast cancer is one the most common cause of cancer death in women worldwide. We report here the first phase II study investigating a virus genetically engineered for tumor-selective replication in patients with breast cancer. Ten patients were treated with a combination of low-dose oral cyclophosphamide and intra-venous JX-594, a thymidine kinase gene-inactivated oncolytic vaccinia virus engineered for the expression of transgenes encoding human granulocyte-macrophage colony-stimulating factor (GM-CSF) and β-galactosidase. Best response as per RECIST criteria was stable disease for 2 patients and progressive disease for 8 patients. Median progression-free and overall survival were 1.6 months (95% CI: [1.1-1.9]) and 14.4 months (95% CI: [2.0 - NA]) respectively. High throughput analysis of sequential plasma samples revealed an upregulation of protein biomarkers reflecting immune induction such as IFN gamma. Whether the combination of JX-594 with an immune checkpoint inhibitor is associated with meaningful clinical activity is therefore worth to investigate.
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Affiliation(s)
- Sophie Cousin
- grid.476460.70000 0004 0639 0505Department of Medical Oncology, Early Phase Trials and Sarcoma Units, Institut Bergonié, 229 Cours de l’Argonne, Bordeaux, France
| | - Maud Toulmonde
- grid.476460.70000 0004 0639 0505Department of Medical Oncology, Early Phase Trials and Sarcoma Units, Institut Bergonié, 229 Cours de l’Argonne, Bordeaux, France
| | - Michèle Kind
- grid.476460.70000 0004 0639 0505Department of Medical Imaging, Institut Bergonié, Bordeaux, France
| | | | | | - Coralie Cantarel
- grid.412041.20000 0001 2106 639XBordeaux Population Health Research Center, Univ. Bordeaux, Epicene team, UMR 1219, F-33000 Inserm, Bordeaux, France ,grid.476460.70000 0004 0639 0505Clinical and Epidemiological Research Unit, Comprehensive Cancer Center, Inserm CIC1401, Institut Bergonié, F-33000 Bordeaux, France
| | - Carine Bellera
- grid.412041.20000 0001 2106 639XBordeaux Population Health Research Center, Univ. Bordeaux, Epicene team, UMR 1219, F-33000 Inserm, Bordeaux, France ,grid.476460.70000 0004 0639 0505Clinical and Epidemiological Research Unit, Comprehensive Cancer Center, Inserm CIC1401, Institut Bergonié, F-33000 Bordeaux, France
| | - Antoine Italiano
- grid.476460.70000 0004 0639 0505Department of Medical Oncology, Early Phase Trials and Sarcoma Units, Institut Bergonié, 229 Cours de l’Argonne, Bordeaux, France ,grid.412041.20000 0001 2106 639XFaculty of Medicine, University of Bordeaux, Bordeaux, France
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10
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Marek K, Armando F, Nippold VM, Rohn K, Plattet P, Brogden G, Gerold G, Baumgärtner W, Puff C. Persistent Infection of a Canine Histiocytic Sarcoma Cell Line with Attenuated Canine Distemper Virus Expressing Vasostatin or Granulocyte-Macrophage Colony-Stimulating Factor. Int J Mol Sci 2022; 23:ijms23116156. [PMID: 35682834 PMCID: PMC9181094 DOI: 10.3390/ijms23116156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/20/2022] [Accepted: 05/26/2022] [Indexed: 02/04/2023] Open
Abstract
Canine histiocytic sarcoma (HS) represents a neoplasia with poor prognosis. Due to the high metastatic rate of HS, there is urgency to improve treatment options and to prevent tumor metastases. Canine distemper virus (CDV) is a single-stranded negative-sense RNA (ssRNA (-)) virus with potentially oncolytic properties. Moreover, vasostatin and granulocyte-macrophage colony-stimulating factor (GM-CSF) are attractive molecules in cancer therapy research because of their anti-angiogenetic properties and potential modulation of the tumor microenvironment. In the present study, an in vitro characterization of two genetically engineered viruses based on the CDV strain Onderstepoort (CDV-Ond), CDV-Ondneon-vasostatin and CDV-Ondneon-GM-CSF was performed. Canine histiocytic sarcoma cells (DH82 cells) were persistently infected with CDV-Ond, CDV-Ondneon, CDV-Ondneon-vasostatin and CDV-Ondneon-GM-CSF and characterized on a molecular and protein level regarding their vasostatin and GM-CSF production. Interestingly, DH82 cells persistently infected with CDV-Ondneon-vasostatin showed a significantly increased number of vasostatin mRNA transcripts. Similarly, DH82 cells persistently infected with CDV-Ondneon-GM-CSF displayed an increased number of GM-CSF mRNA transcripts mirrored on the protein level as confirmed by immunofluorescence and Western blot. In summary, modified CDV-Ond strains expressed GM-CSF and vasostatin, rendering them promising candidates for the improvement of oncolytic virotherapies, which should be further detailed in future in vivo studies.
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Affiliation(s)
- Katarzyna Marek
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (K.M.); (F.A.); (V.M.N.); (C.P.)
- Center for Systems Neuroscience, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Federico Armando
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (K.M.); (F.A.); (V.M.N.); (C.P.)
| | - Vanessa Maria Nippold
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (K.M.); (F.A.); (V.M.N.); (C.P.)
| | - Karl Rohn
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Philippe Plattet
- Division of Experimental Clinical Research, Vetsuisse University Bern, 3012 Bern, Switzerland;
| | - Graham Brogden
- Department of Biochemistry, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (G.B.); (G.G.)
- Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Institute for Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Medical School Hannover and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany
| | - Gisa Gerold
- Department of Biochemistry, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (G.B.); (G.G.)
- Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Wallenberg Centre for Molecular Medicine (WCMM), Umeå University, 901 87 Umeå, Sweden
- Department of Clinical Microbiology, Virology, Umeå University, 901 87 Umeå, Sweden
| | - Wolfgang Baumgärtner
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (K.M.); (F.A.); (V.M.N.); (C.P.)
- Center for Systems Neuroscience, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Correspondence:
| | - Christina Puff
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (K.M.); (F.A.); (V.M.N.); (C.P.)
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11
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Biomimetic approaches for targeting tumor inflammation. Semin Cancer Biol 2022; 86:555-567. [DOI: 10.1016/j.semcancer.2022.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 03/31/2022] [Accepted: 04/20/2022] [Indexed: 02/08/2023]
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12
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Saha T, Lukong KE. Breast Cancer Stem-Like Cells in Drug Resistance: A Review of Mechanisms and Novel Therapeutic Strategies to Overcome Drug Resistance. Front Oncol 2022; 12:856974. [PMID: 35392236 PMCID: PMC8979779 DOI: 10.3389/fonc.2022.856974] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/21/2022] [Indexed: 12/12/2022] Open
Abstract
Breast cancer is the most frequent type of malignancy in women worldwide, and drug resistance to the available systemic therapies remains a major challenge. At the molecular level, breast cancer is heterogeneous, where the cancer-initiating stem-like cells (bCSCs) comprise a small yet distinct population of cells within the tumor microenvironment (TME) that can differentiate into cells of multiple lineages, displaying varying degrees of cellular differentiation, enhanced metastatic potential, invasiveness, and resistance to radio- and chemotherapy. Based on the expression of estrogen and progesterone hormone receptors, expression of human epidermal growth factor receptor 2 (HER2), and/or BRCA mutations, the breast cancer molecular subtypes are identified as TNBC, HER2 enriched, luminal A, and luminal B. Management of breast cancer primarily involves resection of the tumor, followed by radiotherapy, and systemic therapies including endocrine therapies for hormone-responsive breast cancers; HER2-targeted therapy for HER2-enriched breast cancers; chemotherapy and poly (ADP-ribose) polymerase inhibitors for TNBC, and the recent development of immunotherapy. However, the complex crosstalk between the malignant cells and stromal cells in the breast TME, rewiring of the many different signaling networks, and bCSC-mediated processes, all contribute to overall drug resistance in breast cancer. However, strategically targeting bCSCs to reverse chemoresistance and increase drug sensitivity is an underexplored stream in breast cancer research. The recent identification of dysregulated miRNAs/ncRNAs/mRNAs signatures in bCSCs and their crosstalk with many cellular signaling pathways has uncovered promising molecular leads to be used as potential therapeutic targets in drug-resistant situations. Moreover, therapies that can induce alternate forms of regulated cell death including ferroptosis, pyroptosis, and immunotherapy; drugs targeting bCSC metabolism; and nanoparticle therapy are the upcoming approaches to target the bCSCs overcome drug resistance. Thus, individualizing treatment strategies will eliminate the minimal residual disease, resulting in better pathological and complete response in drug-resistant scenarios. This review summarizes basic understanding of breast cancer subtypes, concept of bCSCs, molecular basis of drug resistance, dysregulated miRNAs/ncRNAs patterns in bCSCs, and future perspective of developing anticancer therapeutics to address breast cancer drug resistance.
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Affiliation(s)
- Taniya Saha
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Kiven Erique Lukong
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK, Canada
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13
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Lei W, Ye Q, Hao Y, Chen J, Huang Y, Yang L, Wang S, Qian W. CD19-targeted BiTE expression by an oncolytic vaccinia virus significantly augments therapeutic efficacy against B-cell lymphoma. Blood Cancer J 2022; 12:35. [PMID: 35228544 PMCID: PMC8885649 DOI: 10.1038/s41408-022-00634-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/06/2022] [Accepted: 02/14/2022] [Indexed: 12/28/2022] Open
Abstract
Immunotherapy with CD19-targeting bispecific T-cell engagers (CD19BiTEs) has demonstrated highly effective killing of cancer cells in patients with precursor acute lymphoblastic leukemia and non-Hodgkin's lymphomas. However, there are some drawbacks to this therapy, such as toxicity, short half-life in the serum, and immunosuppressive tumor microenvironment that could limit the use of CD19BiTEs in the clinic. Here, we generate an oncolytic vaccinia virus (OVV) encoding a CD19-specific BiTE (OVV-CD19BiTE). We demonstrate that OVV-CD19BiTE's ability to replicate and induce oncolysis was similar to that of its parental counterpart. Supernatants from OVV-CD19BiTE-infected cells could induce activation and proliferation of human T cells, and the bystander effect of the virus was also demonstrated. In vivo study showed that OVV-CD19BiTE selectively replicated within tumor tissue, and contributed to a more significantly increased percentage of CD3, CD8, and naïve CD8 T subpopulations within tumors in contrast to blinatumomab. More importantly, treatment with OVV-CD19BiTE both in vitro and in vivo resulted in potent antitumor activity in comparison with control OVV or blinatumomab, a first-in-class BiTE, thereby resulting in long-term tumor remissions without relapse. The study provides strong evidence for the therapeutic benefits of CD19-targeting BiTE expression by OVV, and suggests the feasibility of testing the approach in clinical trials.
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Affiliation(s)
- Wen Lei
- Department of Hematology, Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, P. R. China.,Cancer Institute, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
| | - Qian Ye
- Hangzhou RongGu Biotechnology Limited Company, 310056, Hangzhou, Zhejiang, P. R. China
| | - Yuanyuan Hao
- Department of Hematology, Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, P. R. China.,Cancer Institute, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
| | - Jie Chen
- Hangzhou RongGu Biotechnology Limited Company, 310056, Hangzhou, Zhejiang, P. R. China
| | - Yu Huang
- Academy of Chinese Medical Sciences, Zhejiang Chinese Medical University, 310053, Hangzhou, Zhejiang, P. R. China
| | - Liu Yang
- Cancer Center, Department of Medical Oncology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, 310014, Hangzhou, Zhejiang, P. R. China
| | - Shibing Wang
- Cancer Center, Molecular Diagnosis Laboratory, Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, 310014, Hangzhou, Zhejiang, P. R. China.
| | - Wenbin Qian
- Department of Hematology, Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, P. R. China. .,Cancer Institute, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China.
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14
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Cristi F, Gutiérrez T, Hitt MM, Shmulevitz M. Genetic Modifications That Expand Oncolytic Virus Potency. Front Mol Biosci 2022; 9:831091. [PMID: 35155581 PMCID: PMC8826539 DOI: 10.3389/fmolb.2022.831091] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/06/2022] [Indexed: 12/20/2022] Open
Abstract
Oncolytic viruses (OVs) are a promising type of cancer therapy since they selectively replicate in tumor cells without damaging healthy cells. Many oncolytic viruses have progressed to human clinical trials, however, their performance as monotherapy has not been as successful as expected. Importantly, recent literature suggests that the oncolytic potential of these viruses can be further increased by genetically modifying the viruses. In this review, we describe genetic modifications to OVs that improve their ability to kill tumor cells directly, to dismantle the tumor microenvironment, or to alter tumor cell signaling and enhance anti-tumor immunity. These advances are particularly important to increase virus spread and reduce metastasis, as demonstrated in animal models. Since metastasis is the principal cause of mortality in cancer patients, having OVs designed to target metastases could transform cancer therapy. The genetic alterations reported to date are only the beginning of all possible improvements to OVs. Modifications described here could be combined together, targeting multiple processes, or with other non-viral therapies with potential to provide a strong and lasting anti-tumor response in cancer patients.
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Affiliation(s)
- Francisca Cristi
- Shmulevitz Laboratory, Department of Medical Microbiology and Immunology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Tomás Gutiérrez
- Goping Laboratory, Department of Biochemistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Mary M. Hitt
- Hitt Laboratory, Department of Oncology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- *Correspondence: Mary M. Hitt, ; Maya Shmulevitz,
| | - Maya Shmulevitz
- Shmulevitz Laboratory, Department of Medical Microbiology and Immunology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
- *Correspondence: Mary M. Hitt, ; Maya Shmulevitz,
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15
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Spiesschaert B, Angerer K, Park J, Wollmann G. Combining Oncolytic Viruses and Small Molecule Therapeutics: Mutual Benefits. Cancers (Basel) 2021; 13:3386. [PMID: 34298601 PMCID: PMC8306439 DOI: 10.3390/cancers13143386] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/28/2021] [Accepted: 07/01/2021] [Indexed: 02/07/2023] Open
Abstract
The focus of treating cancer with oncolytic viruses (OVs) has increasingly shifted towards achieving efficacy through the induction and augmentation of an antitumor immune response. However, innate antiviral responses can limit the activity of many OVs within the tumor and several immunosuppressive factors can hamper any subsequent antitumor immune responses. In recent decades, numerous small molecule compounds that either inhibit the immunosuppressive features of tumor cells or antagonize antiviral immunity have been developed and tested for. Here we comprehensively review small molecule compounds that can achieve therapeutic synergy with OVs. We also elaborate on the mechanisms by which these treatments elicit anti-tumor effects as monotherapies and how these complement OV treatment.
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Affiliation(s)
- Bart Spiesschaert
- Christian Doppler Laboratory for Viral Immunotherapy of Cancer, Medical University Innsbruck, 6020 Innsbruck, Austria; (B.S.); (K.A.)
- Institute of Virology, Medical University Innsbruck, 6020 Innsbruck, Austria
- ViraTherapeutics GmbH, 6063 Rum, Austria
- Boehringer Ingelheim Pharma GmbH & Co. KG, 88397 Biberach a.d. Riss, Germany;
| | - Katharina Angerer
- Christian Doppler Laboratory for Viral Immunotherapy of Cancer, Medical University Innsbruck, 6020 Innsbruck, Austria; (B.S.); (K.A.)
- Institute of Virology, Medical University Innsbruck, 6020 Innsbruck, Austria
| | - John Park
- Boehringer Ingelheim Pharma GmbH & Co. KG, 88397 Biberach a.d. Riss, Germany;
| | - Guido Wollmann
- Christian Doppler Laboratory for Viral Immunotherapy of Cancer, Medical University Innsbruck, 6020 Innsbruck, Austria; (B.S.); (K.A.)
- Institute of Virology, Medical University Innsbruck, 6020 Innsbruck, Austria
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16
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Role of Myeloid Cells in Oncolytic Reovirus-Based Cancer Therapy. Viruses 2021; 13:v13040654. [PMID: 33920168 PMCID: PMC8070345 DOI: 10.3390/v13040654] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 04/06/2021] [Accepted: 04/08/2021] [Indexed: 12/11/2022] Open
Abstract
Oncolytic reovirus preferentially targets and kills cancer cells via the process of oncolysis, and additionally drives clinically favorable antitumor T cell responses that form protective immunological memory against cancer relapse. This two-prong attack by reovirus on cancers constitutes the foundation of its use as an anticancer oncolytic agent. Unfortunately, the efficacy of these reovirus-driven antitumor effects is influenced by the highly suppressive tumor microenvironment (TME). In particular, the myeloid cell populations (e.g., myeloid-derived suppressive cells and tumor-associated macrophages) of highly immunosuppressive capacities within the TME not only affect oncolysis but also actively impair the functioning of reovirus-driven antitumor T cell immunity. Thus, myeloid cells within the TME play a critical role during the virotherapy, which, if properly understood, can identify novel therapeutic combination strategies potentiating the therapeutic efficacy of reovirus-based cancer therapy.
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