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Immunogenic HSV-mediated oncolysis shapes the antitumor immune response and contributes to therapeutic efficacy. Mol Ther 2013; 22:123-31. [PMID: 24343053 DOI: 10.1038/mt.2013.238] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Accepted: 09/30/2013] [Indexed: 01/03/2023] Open
Abstract
Within the oncolytic virus field, the extent of virus replication that is essential for immune stimulation to control tumor growth remains unresolved. Using infected cell protein 0 (ICP0)-defective oncolytic Herpes simplex virus type 1 (HSV-1) and HSV-2 viruses (dICP0 and dNLS) that show differences in their in vitro replication and cytotoxicity, we investigated the inherent features of oncolytic HSV viruses that are required for potent antitumor activity. In vitro, the HSV-2 vectors showed rapid cytotoxicity despite lower viral burst sizes compared to HSV-1 vectors. In vivo, although both of the dICP0 vectors initially replicated to a similar level, HSV-1 dICP0 was rapidly cleared from the tumors. In spite of this rapid clearance, HSV-1 dICP0 treatment conferred significant survival benefit. HSV-1 dICP0-treated tumors showed significantly higher levels of danger-associated molecular patterns that correlated with higher numbers of antigen-presenting cells within the tumor and increased antigen-specific CD8+ T-cell levels in the peripheral blood. This study suggests that, at least in the context of oncolytic HSV, the initial stages of immunogenic virus replication leading to activation of antitumor immunity are more important than persistence of a replicating virus within the tumor. This knowledge provides important insight for the design of therapeutically successful oncolytic viruses.
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Motalleb G. Virotherapy in cancer. IRANIAN JOURNAL OF CANCER PREVENTION 2013; 6:101-7. [PMID: 25250118 PMCID: PMC4142919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 03/08/2013] [Indexed: 11/25/2022]
Abstract
New cancer therapies with novel mechanisms and functions are needed to treatpatients with different cancers. Virotherapy is a good scenario for such treatment. The advantages of virotherapy include the potential lack of cross resistance with standard therapies and the ability to cause tumor destruction by numerous mechanisms. Oncolytic virus not only possesses unique mechanisms of action that are distinct from other treatment modalities, its self-perpetuating nature provides an ideal platform for therapeutic transgenic insertion. In this review article, a variety of oncolytic viruses in cancer gene therapy will be described.
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Mansfield D, Pencavel T, Kyula JN, Zaidi S, Roulstone V, Thway K, Karapanagiotou L, Khan AA, McLaughlin M, Touchefeu Y, Seth R, Melcher AA, Vile RG, Pandha HS, Harrington KJ. Oncolytic Vaccinia virus and radiotherapy in head and neck cancer. Oral Oncol 2012; 49:108-18. [PMID: 22925693 DOI: 10.1016/j.oraloncology.2012.07.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/24/2012] [Accepted: 07/28/2012] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Oncolytic forms of attenuated Vaccinia virus are now in clinical development, assessing the compatibility of this novel treatment with radiotherapy may reveal exploitable synergistic relationships. MATERIALS AND METHODS In vitro analyses of cell killing, cell cycle effects and caspase activation were carried out on HN3, HN5, CAL27, Detroit, SIHN5B, and PJ41 cells. In vivo studies of the virus and X-radiation were performed on H&N xenografts in CD1 nude mice. RESULTS Cell killing in vitro was demonstrated to be dose- and time-dependent. Infection causes an increase in S-phase and sub-G1 cells. A dose dependent increase in active caspase-3 indicated induction of apoptosis. Xenografts injected with Vaccinia stabilised and frequently completely regressed. Combination with radiation generated additional cell death, induction of caspase activity and in vivo further improved long term regression rates. CONCLUSIONS These data support continued exploration of this therapy combination and indicates potential for clinical trials in head and neck cancer.
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Affiliation(s)
- D Mansfield
- The Institute of Cancer Research, Divisions of Cancer Biology and Radiotherapy and Imaging, Targeted Therapy Team, London, UK.
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Alpizar YA, Chain B, Collins MK, Greenwood J, Katz D, Stauss HJ, Mitchison NA. Ten years of progress in vaccination against cancer: the need to counteract cancer evasion by dual targeting in future therapies. Cancer Immunol Immunother 2011; 60:1127-35. [PMID: 21479639 PMCID: PMC11028423 DOI: 10.1007/s00262-011-0985-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Accepted: 01/31/2011] [Indexed: 12/19/2022]
Abstract
Although cancer immunology has made vigorous progress over the last decade, its future remains uncertain. Tumors have clearly proved subject to immune surveillance, leading to antigenic editing, and means of activating both T and B arms of the immune system have been devised. Therapeutic vaccination and monoclonal antibody therapy have so far proved disappointing, because tumors prove adept at evasion from immune control. Dual targeting could well counteract evasion, provided that the two targets are independent and are attacked simultaneously. This stage has nearly but not quite been reached in several forms of immunotherapy, particularly of B-cell cancers, although such treatment also carries hazards.
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Affiliation(s)
| | - Benjamin Chain
- Division of Infection and Immunity, University College London (UCL), London, UK
| | - Mary K. Collins
- Division of Infection and Immunity, University College London (UCL), London, UK
| | - John Greenwood
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL UK
| | - David Katz
- Division of Infection and Immunity, University College London (UCL), London, UK
| | - Hans J. Stauss
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL UK
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Bourke MG, Salwa S, Harrington KJ, Kucharczyk MJ, Forde PF, de Kruijf M, Soden D, Tangney M, Collins JK, O'Sullivan GC. The emerging role of viruses in the treatment of solid tumours. Cancer Treat Rev 2011; 37:618-32. [PMID: 21232872 DOI: 10.1016/j.ctrv.2010.12.003] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 12/04/2010] [Accepted: 12/07/2010] [Indexed: 12/13/2022]
Abstract
There is increasing optimism for the use of non-pathogenic viruses in the treatment of many cancers. Initial interest in oncolytic virotherapy was based on the observation of an occasional clinical resolution of a lymphoma after a systemic viral infection. In many cancers, by comparison with normal tissues, the competency of the cellular anti-viral mechanism is impaired, thus creating an exploitable difference between the tumour and normal cells, as an unimpeded viral proliferation in cancer cells is eventually cytocidal. In addition to their oncolytic capability, these particular viruses may be engineered to facilitate gene delivery to tumour cells to produce therapeutic effects such as cytokine secretion and anti -tumour immune responses prior to the eventual cytolysis. There is now promising clinical experience with these viral strategies, particularly as part of multimodal studies, and already several clinical trials are in progress. The limitations of standard cancer chemotherapies, including their lack of specificity with consequent collateral toxicity and the development of cross-resistance, do not appear to apply to viral-based therapies. Furthermore, virotherapy frequently restores chemoradiosensitivity to resistant tumours and has also demonstrated efficacy against cancers that historically have a dismal prognosis. While there is cause for optimism, through continued improvements in the efficiency and safety of systemic delivery, through the emergence of alternative viral agents and through favourable clinical experiences, clinical trials as part of multimodal protocols will be necessary to define clinical utility. Significant progress has been made and this is now a major research area with an increasing annual bibliography.
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Affiliation(s)
- M G Bourke
- Cork Cancer Research Centre, Leslie C. Quick Jnr. Laboratory, Biosciences Institute, University College Cork, Ireland.
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Mühlebach MD, Schaser T, Zimmermann M, Armeanu S, Hanschmann KMO, Cattaneo R, Bitzer M, Lauer UM, Cichutek K, Buchholz CJ. Liver cancer protease activity profiles support therapeutic options with matrix metalloproteinase-activatable oncolytic measles virus. Cancer Res 2010; 70:7620-9. [PMID: 20858718 DOI: 10.1158/0008-5472.can-09-4650] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Primary and secondary cancers of the liver are a significant health problem with limited treatment options. We sought here to develop an oncolytic measles virus (MV) preferentially activated in liver tumor tissue, thus reducing infection and destruction of healthy tissue. We documented that in primary tumor tissue, urokinase-type plasminogen activator and especially matrix metalloproteinase-2 (MMP-2) are significantly more active than in adjacent nontumorous tissue. We then generated variants of the MV fusion protein by inserting different MMP substrate motifs at the protease cleavage site and identified the motif PQGLYA as the most efficient cleavage site as determined by syncytia formation on protease-positive tumor cells. The corresponding MMP-activatable oncolytic MV-MMPA1 virus was rescued and shown to be strongly restricted on primary human hepatocytes and healthy human liver tissue, while remaining as effective as the parental MV in the tumor tissue sections. Our findings underline the clinical potency of the MMP activation concept as a strategy to generate safer oncolytic viruses for the treatment of primary and secondary cancers of the liver.
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Affiliation(s)
- Michael D Mühlebach
- Division of Medical Biotechnology and Biostatistics Section, Paul-Ehrlich-Institut, Langen, Germany
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Abstract
Oncolytic adenoviruses (Ads) constitute a promising new class of anticancer agent. They are based on the well-studied adenoviral vector system, which lends itself to concept-driven design to generate oncolytic variants. The first oncolytic Ad was approved as a drug in China in 2005, although clinical efficacy observed in human trials has failed to reach the high expectations that were based on studies in animal models. Current obstacles to the full realization of efficacy of this class of anticancer agent include (i) limited efficiency of infection and specific replication in tumor cells, (ii) limited vector spread within the tumor, (iii) imperfect animal models and methods of in vivo imaging, and (iv) an incomplete understanding of the interaction of these agents with the host. In this review, we discuss recent advances in the field of oncolytic Ads and potential ways to overcome current obstacles to their clinical application and efficacy.
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Prestwich RJ, Errington F, Diaz RM, Pandha HS, Harrington KJ, Melcher AA, Vile RG. The case of oncolytic viruses versus the immune system: waiting on the judgment of Solomon. Hum Gene Ther 2009; 20:1119-32. [PMID: 19630549 PMCID: PMC2829276 DOI: 10.1089/hum.2009.135] [Citation(s) in RCA: 142] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Accepted: 07/24/2009] [Indexed: 02/07/2023] Open
Abstract
The three-way interaction between oncolytic viruses, the tumor microenvironment, and the immune system is critical to the outcome of antitumor therapy. Classically, the immune system is thought to limit the efficacy of therapy, leading to viral clearance. However, preclinical and clinical data suggest that in some cases virotherapy may in fact act as cancer immunotherapy. In this review we discuss the ability of oncolytic viruses to alter the immunogenic milieu of the tumor microenvironment, and the role of innate and adaptive immunity in both restricting and augmenting therapy. Strategies to improve virotherapy by immunomodulation, including suppression or enhancement of the innate and adaptive responses, are discussed.
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Affiliation(s)
- Robin J. Prestwich
- Leeds Institute of Molecular Medicine, University of Leeds, Leeds LS9 7TF, United Kingdom
| | - Fiona Errington
- Leeds Institute of Molecular Medicine, University of Leeds, Leeds LS9 7TF, United Kingdom
| | - Rosa M. Diaz
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905
- Department of Immunology, Mayo Clinic, Rochester, MN 55905
| | - Hardev S. Pandha
- Postgraduate Medical School, University of Surrey, Guildford GU2 7XX, United Kingdom
| | - Kevin J. Harrington
- Targeted Therapy Laboratory, Institute of Cancer Research, Cancer Research UK, Chester Beatty Laboratories, London SW3 6JB, United Kingdom
| | - Alan A. Melcher
- Leeds Institute of Molecular Medicine, University of Leeds, Leeds LS9 7TF, United Kingdom
| | - Richard G. Vile
- Leeds Institute of Molecular Medicine, University of Leeds, Leeds LS9 7TF, United Kingdom
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905
- Department of Immunology, Mayo Clinic, Rochester, MN 55905
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