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Sallard E, Schulte L, van den Boom A, Klimovitskii A, Knierer J, Hagedorn C, Knocks M, Zhang W, Kreppel F, Ehrhardt A, Ehrke-Schulz E. Development of oncolytic and gene therapy vectors based on adenovirus serotype 4 as an alternative to adenovirus serotype 5. J Gene Med 2024; 26:e3576. [PMID: 37580111 DOI: 10.1002/jgm.3576] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/13/2023] [Accepted: 07/14/2023] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND Adenoviral vectors are among the most frequently used vectors for gene therapy and cancer treatment. Most vectors are derived from human adenovirus (Ad) serotype 5 despite limited applicability caused by pre-existing immunity and unfavorable liver tropism, whereas the other more than 100 known human serotypes remain largely unused. Here, we screened a library of human Ad types and identified Ad4 as a promising candidate vector. METHODS Reporter-gene-expressing viruses representative of the natural human Ad diversity were used to transduce an array of muscle cell lines and two- or three-dimensional tumor cultures. The time-course of transgene expression was monitored by fluorescence or luminescence measurements. To generate replication-deficient Ad4 vector genomes, successive homologous recombination was applied. RESULTS Ad4, 17 and 50 transduced human cardiomyocytes more efficiently than Ad5, whereas Ad37 was found to be superior in rhabdomyocytes. Despite its moderate transduction efficiency, Ad4 showed efficient and long-lasting gene expression in papillomavirus (HPV) positive tumor organoids. Therefore, we aimed to harness the potential of Ad4 for improved muscle transduction or oncolytic virotherapy of HPV-positive tumors. We deleted the E1 and E3 transcription units to produce first generation Ad vectors for gene therapy. The E1- and E1/E3-deleted vectors were replication-competent in HEK293 cells stably expressing E1 but not in the other cell lines tested. Furthermore, we show that the Ad5 E1 transcription unit can complement the replication of E1-deleted Ad4 vectors. CONCLUSIONS Our Ad4-based gene therapy vector platform contributes to the development of improved Ad vectors based on non-canonical serotypes for a broad range of applications.
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Affiliation(s)
- Erwan Sallard
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Lukas Schulte
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Alexander van den Boom
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Alexander Klimovitskii
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Julius Knierer
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Claudia Hagedorn
- Institute for Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Maximilian Knocks
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Wenli Zhang
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Florian Kreppel
- Institute for Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Anja Ehrhardt
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Eric Ehrke-Schulz
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
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2
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Fakih M, Harb W, Mahadevan D, Babiker H, Berlin J, Lillie T, Krige D, Carter J, Cox C, Patel M, Parfitt L, Powell M, Rosen L. Safety and efficacy of the tumor-selective adenovirus enadenotucirev, in combination with nivolumab, in patients with advanced/metastatic epithelial cancer: a phase I clinical trial (SPICE). J Immunother Cancer 2023; 11:jitc-2022-006561. [PMID: 37094988 PMCID: PMC10151977 DOI: 10.1136/jitc-2022-006561] [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: 03/30/2023] [Indexed: 04/26/2023] Open
Abstract
BACKGROUND Novel combination therapies to overcome anti-PD-1 resistance are required. Enadenotucirev, a tumor-selective blood stable adenoviral vector, has demonstrated a manageable safety profile and ability to increase tumor immune-cell infiltration in phase I studies in solid tumors. METHODS We conducted a phase I multicenter study of intravenous enadenotucirev plus nivolumab in patients with advanced/metastatic epithelial cancer not responding to standard therapy. Co-primary objectives were safety/tolerability and maximum tolerated dose and/or maximum feasible dose (MTD/MFD) of enadenotucirev plus nivolumab. Additional endpoints included response rate, cytokine responses, and anti-tumor immune responses. RESULTS Overall, 51 heavily pre-treated patients were treated, 45/51 (88%) of whom had colorectal cancer (35/35 patients with information available were microsatellite instability-low/microsatellite stable) and 6/51 (12%) had squamous cell carcinoma of the head and neck. The MTD/MFD of enadenotucirev plus nivolumab was not reached, with the highest dose level tested (1×1012 vp day 1; 6×1012 vp days 3 and 5) shown to be tolerable. Overall, 31/51 (61%) patients experienced a grade 3-4 treatment-emergent adverse event (TEAE), most frequently anemia (12%), infusion-related reaction (8%), hyponatremia (6%), and large intestinal obstruction (6%). Seven (14%) patients experienced serious TEAEs related to enadenotucirev; the only serious TEAE related to enadenotucirev occurring in >1 patient was infusion-related reaction (n=2). Among the 47 patients included in efficacy analyses, median progression-free survival was 1.6 months, objective response rate was 2% (one partial response for 10 months), and 45% of patients achieved stable disease. Median overall survival was 16.0 months; 69% of patients were alive at 12 months. Persistent increases in Th1 and related cytokines (IFNγ, IL-12p70, IL-17A) were seen from ~day 15 in two patients, one of whom had a partial response. Among the 14 patients with matching pre-tumor and post-tumor biopsies, 12 had an increase in intra-tumoral CD8+ T-cell infiltration and 7 had increased markers of CD8 T-cell cytolytic activity. CONCLUSIONS Intravenously dosed enadenotucirev plus nivolumab demonstrated manageable tolerability, an encouraging overall survival and induced immune cell infiltration and activation in patients with advanced/metastatic epithelial cancer. Studies of next-generation variants of enadenotucirev (T-SIGn vectors) designed to further re-program the tumor microenvironment by expressing immune-enhancer transgenes are ongoing. TRIAL REGISTRATION NUMBER NCT02636036.
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Affiliation(s)
- Marwan Fakih
- City of Hope Comprehensive Cancer Center, Duarte, California, USA
| | - Wael Harb
- Horizon Oncology Center, Lafayette, Indiana, USA
| | | | - Hani Babiker
- University of Arizona Cancer Center, Tucson, Arizona, USA
| | - Jordan Berlin
- Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA
| | | | | | | | | | | | | | | | - Lee Rosen
- UCLA Medical Center, Los Angeles, California, USA
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3
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Singleton DC, Mowday AM, Guise CP, Syddall SP, Bai SY, Li D, Ashoorzadeh A, Smaill JB, Wilson WR, Patterson AV. Bioreductive prodrug PR-104 improves the tumour distribution and titre of the nitroreductase-armed oncolytic adenovirus ONYX-411 NTR leading to therapeutic benefit. Cancer Gene Ther 2022; 29:1021-1032. [PMID: 34837065 DOI: 10.1038/s41417-021-00409-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 10/05/2021] [Accepted: 11/09/2021] [Indexed: 11/09/2022]
Abstract
Advances in the field of cancer immunotherapy have stimulated renewed interest in adenoviruses as oncolytic agents. Clinical experience has shown that oncolytic adenoviruses are safe and well tolerated but possess modest single-agent activity. One approach to improve the potency of oncolytic viruses is to utilise their tumour selectivity to deliver genes encoding prodrug-activating enzymes. These enzymes can convert prodrugs into cytotoxic species within the tumour; however, these cytotoxins can interfere with viral replication and limit utility. In this work, we evaluated the activity of a nitroreductase (NTR)-armed oncolytic adenovirus ONYX-411NTR in combination with the clinically tested bioreductive prodrug PR-104. Both NTR-expressing cells in vitro and xenografts containing a minor population of NTR-expressing cells were highly sensitive to PR-104. Pharmacologically relevant prodrug exposures did not interfere with ONYX-411NTR replication in vitro. In vivo, prodrug administration increased virus titre and improved virus distribution within tumour xenografts. Colonisation of tumours with high ONYX-411NTR titre resulted in NTR expression and prodrug activation. The combination of ONYX-411NTR with PR-104 was efficacious against HCT116 xenografts, whilst neither prodrug nor virus were active as single agents. This work highlights the potential for future clinical development of NTR-armed oncolytic viruses in combination with bioreductive prodrugs.
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Affiliation(s)
- Dean C Singleton
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand. .,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand. .,Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand.
| | - Alexandra M Mowday
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
| | - Chris P Guise
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand
| | - Sophie P Syddall
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand
| | - Sally Y Bai
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand
| | - Dan Li
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand
| | - Amir Ashoorzadeh
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
| | - Jeff B Smaill
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
| | - William R Wilson
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
| | - Adam V Patterson
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
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4
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Sonzogni O, Zak DE, Sasso MS, Lear R, Muntzer A, Zonca M, West K, Champion BR, Rottman JB. T-SIGn tumor reengineering therapy and CAR T cells synergize in combination therapy to clear human lung tumor xenografts and lung metastases in NSG mice. Oncoimmunology 2022; 11:2029070. [PMID: 35154906 PMCID: PMC8837249 DOI: 10.1080/2162402x.2022.2029070] [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] [Indexed: 11/06/2022] Open
Abstract
Although chimeric antigen receptor (CAR) T cells have emerged as highly effective treatments for patients with hematologic malignancies, similar efficacy has not been achieved in the context of solid tumors. There are several reasons for this disparity including a) fewer solid tumor target antigens, b) heterogenous target expression amongst tumor cells, c) poor trafficking of CAR T cells to the solid tumor and d) an immunosuppressive tumor microenvironment (TME). Oncolytic viruses have the potential to change this paradigm by a) directly lysing tumor cells and releasing tumor neoantigens, b) stimulating the local host innate immune response to release cytokines and recruit additional innate and adaptive immune cells, c) carrying virus-encoded transgenes to “re-program” the TME to a pro-inflammatory environment and d) promoting an adaptive immune response to the neoantigens in this newly permissive TME. Here we show that the Tumor-Specific Immuno-Gene (T-SIGn) virus NG-347 which encodes IFNα, MIP1α and CD80 synergizes with anti-EGFR CAR T cells as well as anti-HER-2 CAR T cells to clear A549 human tumor xenografts and their pulmonary metastases at doses which are subtherapeutic when each is used as a sole treatment. We show that NG-347 changes the TME to a pro-inflammatory environment resulting in the recruitment and activation of both CAR T cells and mouse innate immune cells. We also show that the transgenes encoded by the virus are critical as synergy is lost in their absence.
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Affiliation(s)
| | | | | | | | | | | | - Katy West
- PsiOxus Therapeutics Limited, Abingdon, UK
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5
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Verhulst E, Garnier D, De Meester I, Bauvois B. Validating Cell Surface Proteases as Drug Targets for Cancer Therapy: What Do We Know, and Where Do We Go? Cancers (Basel) 2022; 14:cancers14030624. [PMID: 35158891 PMCID: PMC8833564 DOI: 10.3390/cancers14030624] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 02/06/2023] Open
Abstract
Simple Summary Cell surface proteases (so-called ectoproteases) are associated with cancer, and their targeting may confer valuable options for the improvement of cancer treatment outcome. Over the past 20 years, the permanent development of a multitude of inhibitors against several ectoproteases (including DPP4, FAP, APN, ADAM17, MMP2, and MMP9) has made it into clinical evaluation in haematological and solid tumours. Among them, a few show some efficacy, albeit limited, to cure cancer in the near future. This Review summarizes the efforts thus far undertaken in the development of ectoprotease inhibitors and highlights new directions for targeting ectoproteases as an additional weapon in the fight against cancer. Abstract Cell surface proteases (also known as ectoproteases) are transmembrane and membrane-bound enzymes involved in various physiological and pathological processes. Several members, most notably dipeptidyl peptidase 4 (DPP4/CD26) and its related family member fibroblast activation protein (FAP), aminopeptidase N (APN/CD13), a disintegrin and metalloprotease 17 (ADAM17/TACE), and matrix metalloproteinases (MMPs) MMP2 and MMP9, are often overexpressed in cancers and have been associated with tumour dysfunction. With multifaceted actions, these ectoproteases have been validated as therapeutic targets for cancer. Numerous inhibitors have been developed to target these enzymes, attempting to control their enzymatic activity. Even though clinical trials with these compounds did not show the expected results in most cases, the field of ectoprotease inhibitors is growing. This review summarizes the current knowledge on this subject and highlights the recent development of more effective and selective drugs targeting ectoproteases among which small molecular weight inhibitors, peptide conjugates, prodrugs, or monoclonal antibodies (mAbs) and derivatives. These promising avenues have the potential to deliver novel therapeutic strategies in the treatment of cancers.
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Affiliation(s)
- Emile Verhulst
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, 2000 Antwerp, Belgium; (E.V.); (I.D.M.)
| | - Delphine Garnier
- Centre de Recherche des Cordeliers, Sorbonne Université, Inserm, Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, F-75006 Paris, France;
| | - Ingrid De Meester
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, 2000 Antwerp, Belgium; (E.V.); (I.D.M.)
| | - Brigitte Bauvois
- Centre de Recherche des Cordeliers, Sorbonne Université, Inserm, Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, F-75006 Paris, France;
- Correspondence:
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6
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Moreno V, Barretina-Ginesta MP, García-Donas J, Jayson GC, Roxburgh P, Vázquez RM, Michael A, Antón-Torres A, Brown R, Krige D, Champion B, McNeish I. Safety and efficacy of the tumor-selective adenovirus enadenotucirev with or without paclitaxel in platinum-resistant ovarian cancer: a phase 1 clinical trial. J Immunother Cancer 2021; 9:jitc-2021-003645. [PMID: 34893524 PMCID: PMC8666888 DOI: 10.1136/jitc-2021-003645] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Treatment outcomes remain poor in recurrent platinum-resistant ovarian cancer. Enadenotucirev, a tumor-selective and blood stable adenoviral vector, has demonstrated a manageable safety profile in phase 1 studies in epithelial solid tumors. METHODS We conducted a multicenter, open-label, phase 1 dose-escalation and dose-expansion study (OCTAVE) to assess enadenotucirev plus paclitaxel in patients with platinum-resistant epithelial ovarian cancer. During phase 1a, the maximum tolerated dose of intraperitoneally administered enadenotucirev monotherapy (three doses; days 1, 8 and 15) was assessed using a 3+3 dose-escalation model. Phase 1b included a dose-escalation and an intravenous dosing dose-expansion phase assessing enadenotucirev plus paclitaxel. For phase 1a/b, the primary objective was to determine the maximum tolerated dose of enadenotucirev (with paclitaxel in phase 1b). In the dose-expansion phase, the primary endpoint was progression-free survival (PFS). Additional endpoints included response rate and T-cell infiltration. RESULTS Overall, 38 heavily pretreated patients were enrolled and treated. No dose-limiting toxicities were observed at any doses. However, frequent catheter complications led to the discontinuation of intraperitoneal dosing during phase 1b. Intravenous enadenotucirev (1×1012 viral particles; days 1, 3 and 5 every 28-days for two cycles) plus paclitaxel (80 mg/m2; days 9, 16 and 23 of each cycle) was thus selected for dose-expansion. Overall, 24/38 (63%) patients experienced at least 1 Grade ≥3 treatment-emergent adverse event (TEAE); most frequently neutropenia (21%). Six patients discontinued treatment due to TEAEs, including one patient due to a grade 2 treatment-emergent serious AE of catheter site infection (intraperitoneal enadenotucirev monotherapy). Among the 20 patients who received intravenous enadenotucirev plus paclitaxel, 4-month PFS rate was 64% (median 6.2 months), objective response rate was 10%, 35% of patients achieved stable disease and 65% of patients had a reduction in target lesion burden at ≥1 time point. Five out of six patients with matched pre-treatment and post-treatment biopsies treated with intravenous enadenotucirev plus paclitaxel had increased (mean 3.1-fold) infiltration of CD8 +T cells in post-treatment biopsies. CONCLUSIONS Intravenously dosed enadenotucirev plus paclitaxel demonstrated manageable tolerability, an encouraging median PFS and increased tumor immune-cell infiltration in platinum-resistant ovarian cancer. TRIAL REGISTRATION NUMBER NCT02028117.
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Affiliation(s)
- Victor Moreno
- START Madrid-FJD, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
| | - Maria-Pilar Barretina-Ginesta
- Medical Oncology, Catalan Institute of Oncology, Girona, Spain.,Girona Biomedical Research Institute (IDIBGI), Department of Medical Sciences, University of Girona, Girona, Spain
| | - Jesús García-Donas
- Medical Oncology, HM Hospitales Centro Integral Oncologico Clara Campal, Madrid, Spain
| | - Gordon C Jayson
- Department of Medical Onclogy, The Christie Hospital NHS Trust, Manchester, UK.,Division of Cancer Sciences, The University of Manchester, Manchester, UK
| | - Patricia Roxburgh
- Institute of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, UK.,Medical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, UK
| | - Raúl Márquez Vázquez
- Medical Oncology, Gynecologic Oncology Unit, MD Anderson Cancer Center Madrid, Madrid, Spain
| | | | | | | | | | | | - Iain McNeish
- Institute of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, UK .,Medical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, UK.,Ovarian Cancer Action Research Centre, Department of Surgery and Cancer, Imperial College London, London, UK
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7
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Baker AT, Davies JA, Bates EA, Moses E, Mundy RM, Marlow G, Cole DK, Bliss CM, Rizkallah PJ, Parker AL. The Fiber Knob Protein of Human Adenovirus Type 49 Mediates Highly Efficient and Promiscuous Infection of Cancer Cell Lines Using a Novel Cell Entry Mechanism. J Virol 2021; 95:e01849-20. [PMID: 33268514 PMCID: PMC7851562 DOI: 10.1128/jvi.01849-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/19/2020] [Indexed: 02/07/2023] Open
Abstract
The human adenovirus (HAdV) phylogenetic tree is diverse, divided across seven species and comprising over 100 individual types. Species D HAdV are rarely isolated with low rates of preexisting immunity, making them appealing for therapeutic applications. Several species D vectors have been developed as vaccines against infectious diseases, where they induce robust immunity in preclinical models and early phase clinical trials. However, many aspects of the basic virology of species D HAdV, including their basic receptor usage and means of cell entry, remain understudied. Here, we investigated HAdV-D49, which previously has been studied for vaccine and vascular gene transfer applications. We generated a pseudotyped HAdV-C5 presenting the HAdV-D49 fiber knob protein (HAdV-C5/D49K). This pseudotyped vector was efficient at infecting cells devoid of all known HAdV receptors, indicating HAdV-D49 uses an unidentified cellular receptor. Conversely, a pseudotyped vector presenting the fiber knob protein of the closely related HAdV-D30 (HAdV-C5/D30K), differing in four amino acids from HAdV-D49, failed to demonstrate the same tropism. These four amino acid changes resulted in a change in isoelectric point of the knob protein, with HAdV-D49K possessing a basic apical region compared to a more acidic region in HAdV-D30K. Structurally and biologically we demonstrate that HAdV-D49 knob protein is unable to engage CD46, while potential interaction with coxsackievirus and adenovirus receptor (CAR) is extremely limited by extension of the DG loop. HAdV-C5/49K efficiently transduced cancer cell lines of pancreatic, breast, lung, esophageal, and ovarian origin, indicating it may have potential for oncolytic virotherapy applications, especially for difficult to transduce tumor types.IMPORTANCE Adenoviruses are powerful tools experimentally and clinically. To maximize efficacy, the development of serotypes with low preexisting levels of immunity in the population is desirable. Consequently, attention has focused on those derived from species D, which have proven robust vaccine platforms. This widespread usage is despite limited knowledge in their basic biology and cellular tropism. We investigated the tropism of HAdV-D49, demonstrating that it uses a novel cell entry mechanism that bypasses all known HAdV receptors. We demonstrate, biologically, that a pseudotyped HAdV-C5/D49K vector efficiently transduces a wide range of cell lines, including those presenting no known adenovirus receptor. Structural investigation suggests that this broad tropism is the result of a highly basic electrostatic surface potential, since a homologous pseudotyped vector with a more acidic surface potential, HAdV-C5/D30K, does not display a similar pantropism. Therefore, HAdV-C5/D49K may form a powerful vector for therapeutic applications capable of infecting difficult to transduce cells.
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Affiliation(s)
- Alexander T Baker
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - James A Davies
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Emily A Bates
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Elise Moses
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Rosie M Mundy
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Gareth Marlow
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - David K Cole
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Carly M Bliss
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Pierre J Rizkallah
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Alan L Parker
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, United Kingdom
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8
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Hwang JK, Hong J, Yun CO. Oncolytic Viruses and Immune Checkpoint Inhibitors: Preclinical Developments to Clinical Trials. Int J Mol Sci 2020; 21:E8627. [PMID: 33207653 PMCID: PMC7697902 DOI: 10.3390/ijms21228627] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 10/30/2020] [Accepted: 11/06/2020] [Indexed: 12/12/2022] Open
Abstract
Immuno-oncology (IO) has been an active area of oncology research. Following US FDA approval of the first immune checkpoint inhibitor (ICI), ipilimumab (human IgG1 k anti-CTLA-4 monoclonal antibody), in 2011, and of the first oncolytic virus, Imlygic (talimogene laherparepvec), in 2015, there has been renewed interest in IO. In the past decade, ICIs have changed the treatment paradigm for many cancers by enabling better therapeutic control, resuming immune surveillance, suppressing tumor immunosuppression, and restoring antitumor immune function. However, ICI therapies are effective only in a small subset of patients and show limited therapeutic potential due to their inability to demonstrate efficacy in 'cold' or unresponsive tumor microenvironments (TMEs). Relatedly, oncolytic viruses (OVs) have been shown to induce antitumor immune responses, augment the efficacy of existing cancer treatments, and reform unresponsive TME to turn 'cold' tumors 'hot,' increasing their susceptibility to checkpoint blockade immunotherapies. For this reason, OVs serve as ideal complements to ICIs, and multiple preclinical studies and clinical trials are demonstrating their combined therapeutic efficacy. This review will discuss the merits and limitations of OVs and ICIs as monotherapy then progress onto the preclinical rationale and the results of clinical trials of key combination therapies.
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Affiliation(s)
- June Kyu Hwang
- Department of Bioengineering, College of Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (J.K.H.); (J.H.)
| | - JinWoo Hong
- Department of Bioengineering, College of Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (J.K.H.); (J.H.)
- GeneMedicine Co., Ltd., 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Chae-Ok Yun
- Department of Bioengineering, College of Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea; (J.K.H.); (J.H.)
- GeneMedicine Co., Ltd., 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
- Institute of Nano Science and Technology, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
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9
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Pokrovska TD, Jacobus EJ, Puliyadi R, Prevo R, Frost S, Dyer A, Baugh R, Rodriguez-Berriguete G, Fisher K, Granata G, Herbert K, Taverner WK, Champion BR, Higgins GS, Seymour LW, Lei-Rossmann J. External Beam Radiation Therapy and Enadenotucirev: Inhibition of the DDR and Mechanisms of Radiation-Mediated Virus Increase. Cancers (Basel) 2020; 12:E798. [PMID: 32224979 PMCID: PMC7226394 DOI: 10.3390/cancers12040798] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/20/2020] [Accepted: 03/24/2020] [Indexed: 11/17/2022] Open
Abstract
Ionising radiation causes cell death through the induction of DNA damage, particularly double-stranded DNA (dsDNA) breaks. Evidence suggests that adenoviruses inhibit proteins involved in the DNA damage response (DDR) to prevent recognition of double-stranded viral DNA genomes as cellular dsDNA breaks. We hypothesise that combining adenovirus treatment with radiotherapy has the potential for enhancing tumour-specific cytotoxicity through inhibition of the DDR and augmentation of virus production. We show that EnAd, an Ad3/Ad11p chimeric oncolytic adenovirus currently being trialled in colorectal and other cancers, targets the DDR pathway at a number of junctures. Infection is associated with a decrease in irradiation-induced 53BP1 and Rad51 foci formation, and in total DNA ligase IV levels. We also demonstrate a radiation-associated increase in EnAd production in vitro and in a pilot in vivo experiment. Given the current limitations of in vitro techniques in assessing for synergy between these treatments, we adapted the plaque assay to allow monitoring of viral plaque size and growth and utilised the xCELLigence cell adhesion assay to measure cytotoxicity. Our study provides further evidence on the interaction between adenovirus and radiation in vitro and in vivo and suggests these have at least an additive, and possibly a synergistic, impact on cytotoxicity.
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Affiliation(s)
- Tzveta D. Pokrovska
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
| | - Egon J. Jacobus
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
| | - Rathi Puliyadi
- Tumour Radiosensitivity Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (R.P.); (R.P.); (G.R.-B.); (G.G.); (K.H.); (G.S.H.)
| | - Remko Prevo
- Tumour Radiosensitivity Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (R.P.); (R.P.); (G.R.-B.); (G.G.); (K.H.); (G.S.H.)
| | - Sally Frost
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
| | - Arthur Dyer
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
| | - Richard Baugh
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
| | - Gonzalo Rodriguez-Berriguete
- Tumour Radiosensitivity Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (R.P.); (R.P.); (G.R.-B.); (G.G.); (K.H.); (G.S.H.)
| | - Kerry Fisher
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
- PsiOxus Therapeutics Ltd., Abingdon OX14 3YS, UK;
| | - Giovanna Granata
- Tumour Radiosensitivity Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (R.P.); (R.P.); (G.R.-B.); (G.G.); (K.H.); (G.S.H.)
| | - Katharine Herbert
- Tumour Radiosensitivity Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (R.P.); (R.P.); (G.R.-B.); (G.G.); (K.H.); (G.S.H.)
| | - William K. Taverner
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
| | | | - Geoff S. Higgins
- Tumour Radiosensitivity Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (R.P.); (R.P.); (G.R.-B.); (G.G.); (K.H.); (G.S.H.)
| | - Len W. Seymour
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
| | - Janet Lei-Rossmann
- Anticancer Viruses and Cancer Vaccines Research Group, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (T.D.P.); (E.J.J.); (S.F.); (A.D.); (R.B.); (K.F.); (W.K.T.); (J.L.-R.)
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10
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Taverner WK, Jacobus EJ, Christianson J, Champion B, Paton AW, Paton JC, Su W, Cawood R, Seymour LW, Lei-Rossmann J. Calcium Influx Caused by ER Stress Inducers Enhances Oncolytic Adenovirus Enadenotucirev Replication and Killing through PKCα Activation. Mol Ther Oncolytics 2019; 15:117-130. [PMID: 31890865 PMCID: PMC6931121 DOI: 10.1016/j.omto.2019.09.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 09/22/2019] [Indexed: 01/17/2023] Open
Abstract
Oncolytic viruses represent an emerging approach to cancer therapy. However, better understanding of their interaction with the host cancer cell and approaches to enhance their efficacy are needed. Here, we investigate the effect of chemically induced endoplasmic reticulum (ER) stress on the activity of the chimeric group B adenovirus Enadenotucirev, its closely related parental virus Ad11p, and the archetypal group C oncolytic adenovirus Ad5. We show that treatment of colorectal and ovarian cancer cell lines with thapsigargin or ionomycin caused an influx of Ca2+, leading to an upregulation in E1A transcript and protein levels. Increased E1A protein levels, in turn, increased levels of expression of the E2B viral DNA polymerase, genome replication, late viral protein expression, infectious virus particle production, and cell killing during Enadenotucirev and Ad11p, but not Ad5, infection. This effect was not due to the induction of ER stress, but rather the influx of extracellular Ca2+ and consequent increase in protein kinase C activity. These results underscore the importance of Ca2+ homeostasis during adenoviral infection, indicate a signaling pathway between protein kinase C and E1A, and raise the possibility of using Ca2+ flux-modulating agents in the manufacture and potentiation of oncolytic virotherapies.
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Affiliation(s)
- William K. Taverner
- Department of Oncology, University of Oxford, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Egon J. Jacobus
- Department of Oncology, University of Oxford, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - John Christianson
- NDORMS, Botnar Research Centre, University of Oxford, Headington, Oxford OX3 7LD, UK
| | - Brian Champion
- PsiOxus Therapeutics, Ltd., Milton Park, Abingdon OX14 3YS, UK
| | - Adrienne W. Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide SA 5005, Australia
| | - James C. Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide SA 5005, Australia
| | - Weiheng Su
- Department of Oncology, University of Oxford, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Ryan Cawood
- Oxford Genetics Ltd., Medawar Centre, Robert Robinson Avenue, Oxford OX4 4HG, UK
| | - Len W. Seymour
- Department of Oncology, University of Oxford, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Janet Lei-Rossmann
- Department of Oncology, University of Oxford, Roosevelt Drive, Oxford OX3 7DQ, UK
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12
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Sato-Dahlman M, Yamamoto M. The Development of Oncolytic Adenovirus Therapy in the Past and Future - For the Case of Pancreatic Cancer. Curr Cancer Drug Targets 2019; 18:153-161. [PMID: 28228084 DOI: 10.2174/1568009617666170222123925] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 11/15/2016] [Accepted: 12/05/2016] [Indexed: 12/16/2022]
Abstract
Pancreatic cancer is an aggressive malignant disease and the efficacy of current treatments for unresectable diseases is quite limited despite recent advances. Gene therapy /virotherapy strategies may provide new options for the treatment of various cancers including pancreatic cancer. Oncolytic adenovirus shows an antitumoral effect via its intratumoral amplification and strong cytocidal effect in a variety of cancers and it has been employed for the development of potent oncolytic virotherapy agents for pancreatic cancer. Our ultimate goal is to develop an oncolytic adenovirus enabling the treatment of patients with advanced or spread diseases by systemic injection. Systemic application of oncolytic therapy mandates more efficient and selective gene delivery and needs to embody sufficient antitumor effect even with limited initial delivery to the tumor location. In this review, the current status of oncolytic adenoviruses from the viewpoints of vector design and potential strategies to overcome current obstacles for its clinical application will be described. We will also discuss the efforts to improve the antitumor activity of oncolytic adenovirus, in in vivo animal models, and the combination therapy of oncolytic adenovirus with radiation and chemotherapy.
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Affiliation(s)
- Mizuho Sato-Dahlman
- Division of Basic and Translational Medicine, Department of Surgery, University of Minnesota, MN, United States
| | - Masato Yamamoto
- Division of Basic and Translational Medicine, Department of Surgery, University of Minnesota, MN, United States
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13
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Machiels JP, Salazar R, Rottey S, Duran I, Dirix L, Geboes K, Wilkinson-Blanc C, Pover G, Alvis S, Champion B, Fisher K, McElwaine-Johnn H, Beadle J, Calvo E. A phase 1 dose escalation study of the oncolytic adenovirus enadenotucirev, administered intravenously to patients with epithelial solid tumors (EVOLVE). J Immunother Cancer 2019; 7:20. [PMID: 30691536 PMCID: PMC6348630 DOI: 10.1186/s40425-019-0510-7] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 01/13/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Enadenotucirev is a chimeric adenovirus with demonstrated preclinical tumor-selective cytotoxicity and a short half-life. Further clinical mechanism of action data showed that enadenotucirev can gain access to and replicate within different types of epithelial tumors. This phase 1 dose escalation study assessed intravenous (IV) dose escalation with enadenotucirev to establish the maximum tolerated dose (MTD) and subsequently identify a suitable schedule for repeated cycles. METHODS Sixty-one patients with advanced epithelial tumors unresponsive to conventional therapy were enrolled and received enadenotucirev monotherapy as part of this study. During the phase 1a dose escalation (n = 22) and expansion (n = 9), delivery of enadenotucirev between 1 × 1010 and 1 × 1013 viral particles (vp) on days 1, 3, and 5 (single cycle) was used to determine an appropriate MTD. Subsequent treatment cohorts (phase 1a, n = 6 and phase 1b, n = 24) examined the feasibility of repeated dosing cycles in either 3-weekly or weekly dosing regimens. RESULTS Enadenotucirev displayed a predictable and manageable safety profile at doses up to the MTD of 3 × 1012 vp, irrespective of infusion time or dosing schedule. The most commonly reported treatment-emergent adverse events (TEAEs) of grade 3 or higher were hypoxia, lymphopenia, and neutropenia. The frequency of all TEAEs (notably pyrexia and chills) was highest within 24 h of the first enadenotucirev infusion and decreased upon subsequent dosing. Additionally, delivery of three doses of enadenotucirev over 5 days optimized pharmacokinetic and chemokine profiles in the circulation over time. CONCLUSIONS This study provides key clinical data in patients with solid epithelial tumors following treatment with IV enadenotucirev monotherapy and supports further investigation of enadenotucirev in combination with other therapeutic agents at doses up to the MTD of 3 × 1012 vp. TRIAL REGISTRATION ( ClinicalTrials.gov Identifier: NCT02028442 ). Trial registration date: 07 January 2014 - Retrospectively registered.
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Affiliation(s)
- Jean-Pascal Machiels
- Department of Medical Oncology, Institut Roi Albert II, Cliniques universitaires Saint-Luc and Institut de Recherche Clinique et Expérimentale, Université catholique de Louvain, Brussels, Belgium
| | - Ramon Salazar
- Medical Oncology Department, Catalan Institute of Oncology, IDIBELL, University of Barcelona, Barcelona, Spain
| | - Sylvie Rottey
- Drug Research Unit Ghent, Ghent University Hospital, Ghent, Belgium
| | - Ignacio Duran
- Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville, Spain
| | - Luc Dirix
- Saint-Augustinus Hospital, Antwerp, Belgium
| | - Karen Geboes
- Department of Gastroenterology and Digestive Oncology, Ghent University Hospital, Ghent, Belgium
| | | | - Gillian Pover
- PsiOxus Therapeutics Limited, 4-10 The Quadrant, Barton Lane, Abingdon, UK
| | - Simon Alvis
- PsiOxus Therapeutics Limited, 4-10 The Quadrant, Barton Lane, Abingdon, UK
| | - Brian Champion
- PsiOxus Therapeutics Limited, 4-10 The Quadrant, Barton Lane, Abingdon, UK.
| | - Kerry Fisher
- PsiOxus Therapeutics Limited, 4-10 The Quadrant, Barton Lane, Abingdon, UK
- Department of Oncology, University of Oxford, Oxford, UK
| | | | - John Beadle
- PsiOxus Therapeutics Limited, 4-10 The Quadrant, Barton Lane, Abingdon, UK
| | - Emiliano Calvo
- START Madrid, Centro Integral Oncológico Clara Campal, Hospital Madrid Norte Sanchinarro, Madrid, Spain
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Baker AT, Aguirre-Hernández C, Halldén G, Parker AL. Designer Oncolytic Adenovirus: Coming of Age. Cancers (Basel) 2018; 10:E201. [PMID: 29904022 PMCID: PMC6025169 DOI: 10.3390/cancers10060201] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 06/06/2018] [Accepted: 06/11/2018] [Indexed: 12/26/2022] Open
Abstract
The licensing of talimogene laherparepvec (T-Vec) represented a landmark moment for oncolytic virotherapy, since it provided unequivocal evidence for the long-touted potential of genetically modified replicating viruses as anti-cancer agents. Whilst T-Vec is promising as a locally delivered virotherapy, especially in combination with immune-checkpoint inhibitors, the quest continues for a virus capable of specific tumour cell killing via systemic administration. One candidate is oncolytic adenovirus (Ad); it’s double stranded DNA genome is easily manipulated and a wide range of strategies and technologies have been employed to empower the vector with improved pharmacokinetics and tumour targeting ability. As well characterised clinical and experimental agents, we have detailed knowledge of adenoviruses’ mechanisms of pathogenicity, supported by detailed virological studies and in vivo interactions. In this review we highlight the strides made in the engineering of bespoke adenoviral vectors to specifically infect, replicate within, and destroy tumour cells. We discuss how mutations in genes regulating adenoviral replication after cell entry can be used to restrict replication to the tumour, and summarise how detailed knowledge of viral capsid interactions enable rational modification to eliminate native tropisms, and simultaneously promote active uptake by cancerous tissues. We argue that these designer-viruses, exploiting the viruses natural mechanisms and regulated at every level of replication, represent the ideal platforms for local overexpression of therapeutic transgenes such as immunomodulatory agents. Where T-Vec has paved the way, Ad-based vectors now follow. The era of designer oncolytic virotherapies looks decidedly as though it will soon become a reality.
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Affiliation(s)
- Alexander T Baker
- Division of Cancer and Genetics, Cardiff University School of Medicine, Cardiff CF14 4XN, UK.
| | - Carmen Aguirre-Hernández
- Centre for Molecular Oncology, Barts Cancer Institute, Queen Mary University of London, London EC1M 6BQ, UK.
| | - Gunnel Halldén
- Centre for Molecular Oncology, Barts Cancer Institute, Queen Mary University of London, London EC1M 6BQ, UK.
| | - Alan L Parker
- Division of Cancer and Genetics, Cardiff University School of Medicine, Cardiff CF14 4XN, UK.
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15
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Lei J, Jacobus EJ, Taverner WK, Fisher KD, Hemmi S, West K, Slater L, Lilley F, Brown A, Champion B, Duffy MR, Seymour LW. Expression of human CD46 and trans-complementation by murine adenovirus 1 fails to allow productive infection by a group B oncolytic adenovirus in murine cancer cells. J Immunother Cancer 2018; 6:55. [PMID: 29898782 PMCID: PMC6000980 DOI: 10.1186/s40425-018-0350-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 05/07/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Oncolytic viruses are currently experiencing accelerated development in several laboratories worldwide, with some forty-seven clinical trials currently recruiting. Many oncolytic viruses combine targeted cytotoxicity to cancer cells with a proinflammatory cell lysis. Due to their additional potential to express immunomodulatory transgenes, they are also often known as oncolytic viral vaccines. However, several types of oncolytic viruses are human-specific and the lack of suitable immune-competent animal models complicates biologically relevant evaluation of their vaccine potential. This is a particular challenge for group B adenoviruses, which fail to infect even those immunocompetent animal model systems identified as semi-permissive for type 5 adenovirus. Here, we aim to develop a murine cell line capable of supporting replication of a group B oncolytic adenovirus, enadenotucirev (EnAd), for incorporation into a syngeneic immunocompetent animal model to explore the oncolytic vaccine potential of group B oncolytic viruses. METHODS Transgenic murine cell lines were infected with EnAd expressing GFP transgene under replication-independent or -dependent promoters. Virus mRNA expression, genome replication, and late protein expression were determined by qRT-PCR, qPCR, and immunoblotting, respectively. We also use Balb/c immune-competent mice to determine the tumourogenicity and infectivity of transgenic murine cell lines. RESULTS Our results show that a broad range of human carcinoma cells will support EnAd replication, but not murine carcinoma cells. Murine cells can be readily modified to express surface human CD46, one of the receptors for group B adenoviruses, allowing receptor-mediated uptake of EnAd particles into the murine cells and expression of CMV promoter-driven transgenes. Although the early E1A mRNA was expressed in murine cells at levels similar to human cells, adenovirus E2B and Fibre mRNA expression levels were hampered and few virus genomes were produced. Unlike previous reports on group C adenoviruses, trans-complementation of group B adenoviruses by co-infection with mouse adenovirus 1 did not rescue replication. A panel of group B adenoviruses expressing individual mouse adenovirus 1 genes were also unable to rescue EnAd replication. CONCLUSION Together, these results indicate that there may be major differences in the early stages of replication of group C and B adenoviruses in murine cells, and that the block to the life cycle of B adenoviruses in murine cells occurs in the early stage of virus replication, perhaps reflecting poor activity of Ad11p E1A in murine cells.
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Affiliation(s)
- Janet Lei
- 0000 0004 1936 8948grid.4991.5Department of OncologyUniversity of Oxford OX3 7DQ Oxford UK
| | - Egon J Jacobus
- 0000 0004 1936 8948grid.4991.5Department of OncologyUniversity of Oxford OX3 7DQ Oxford UK
| | - William K Taverner
- 0000 0004 1936 8948grid.4991.5Department of OncologyUniversity of Oxford OX3 7DQ Oxford UK
| | - Kerry D Fisher
- 0000 0004 1936 8948grid.4991.5Department of OncologyUniversity of Oxford OX3 7DQ Oxford UK
| | - Silvio Hemmi
- 0000 0004 1937 0650grid.7400.3Institute of Molecular Life SciencesUniversity of Zurich Zurich Switzerland
| | - Katy West
- 0000 0004 0394 8673grid.476643.4PsiOxus Therapeutics Ltd PsiOxus House, 4-10 The Quadrant, Barton Lane OX14 3YS Abingdon Oxfordshire UK
| | - Lorna Slater
- 0000 0004 0394 8673grid.476643.4PsiOxus Therapeutics Ltd PsiOxus House, 4-10 The Quadrant, Barton Lane OX14 3YS Abingdon Oxfordshire UK
| | - Fred Lilley
- 0000 0004 0394 8673grid.476643.4PsiOxus Therapeutics Ltd PsiOxus House, 4-10 The Quadrant, Barton Lane OX14 3YS Abingdon Oxfordshire UK
| | - Alice Brown
- 0000 0004 0394 8673grid.476643.4PsiOxus Therapeutics Ltd PsiOxus House, 4-10 The Quadrant, Barton Lane OX14 3YS Abingdon Oxfordshire UK
| | - Brian Champion
- 0000 0004 0394 8673grid.476643.4PsiOxus Therapeutics Ltd PsiOxus House, 4-10 The Quadrant, Barton Lane OX14 3YS Abingdon Oxfordshire UK
| | - Margaret R Duffy
- 0000 0004 1936 8948grid.4991.5Department of OncologyUniversity of Oxford OX3 7DQ Oxford UK
| | - Len W Seymour
- 0000 0004 1936 8948grid.4991.5Department of OncologyUniversity of Oxford OX3 7DQ Oxford UK
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Sato-Dahlman M, Wirth K, Yamamoto M. Role of Gene Therapy in Pancreatic Cancer-A Review. Cancers (Basel) 2018; 10:E103. [PMID: 29614005 PMCID: PMC5923358 DOI: 10.3390/cancers10040103] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 03/27/2018] [Accepted: 03/30/2018] [Indexed: 01/05/2023] Open
Abstract
Mortality from pancreatic ductal adenocarcinoma (PDAC) has remained essentially unchanged for decades and its relative contribution to overall cancer death is projected to only increase in the coming years. Current treatment for PDAC includes aggressive chemotherapy and surgical resection in a limited number of patients, with median survival of optimal treatment rather dismal. Recent advances in gene therapies offer novel opportunities for treatment, even in those with locally advanced disease. In this review, we summarize emerging techniques to the design and administration of virotherapy, synthetic vectors, and gene-editing technology. Despite these promising advances, shortcomings continue to exist and here will also be highlighted those approaches to overcoming obstacles in current laboratory and clinical research.
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Affiliation(s)
| | - Keith Wirth
- Department of Surgery, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Masato Yamamoto
- Department of Surgery, University of Minnesota, Minneapolis, MN 55455, USA.
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA.
- Stem Cell Institute, University of Minnesota, Minneapolis, MN 55455, USA.
- Surgery BTR, MMC 195, 8195F, 420 Delaware St SE, Minneapolis, MN 55455, USA.
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Harmon AW, Moitra R, Xu Z, Byrnes AP. Hexons from adenovirus serotypes 5 and 48 differentially protect adenovirus vectors from neutralization by mouse and human serum. PLoS One 2018; 13:e0192353. [PMID: 29401488 PMCID: PMC5798830 DOI: 10.1371/journal.pone.0192353] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/22/2018] [Indexed: 11/28/2022] Open
Abstract
Adenovirus vectors are widely used in gene therapy clinical trials, and preclinical studies with these vectors are often conducted in mice. It is therefore critical to understand whether mouse studies adequately predict the behavior of adenovirus vectors in humans. The most commonly-used adenovirus vectors are derived from adenovirus serotype 5 (Ad5). The Ad5 hexon protein can bind coagulation factor X (FX), and binding of FX has a major impact on vector interactions with other blood proteins. In mouse serum, FX protects Ad5 vectors from neutralization by natural antibodies and complement. In the current study, we similarly find that human FX inhibits neutralization of Ad5 vectors by human serum, and this finding is consistent among individual human sera. We show that human IgM and human IgG can each induce complement-mediated neutralization when Ad5 vectors are not protected by FX. Although mouse and human serum had similar effects on Ad5 vectors, we found that this was not true for a chimeric Ad5 vector that incorporated hexon regions from adenovirus serotype 48. Interestingly, this hexon-chimeric vector was neutralized by human serum, but not by mouse serum. These findings indicate that studies in mouse serum accurately predict the behavior of Ad5 vectors in human serum, but mouse serum is not an accurate model system for all adenovirus vectors.
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Affiliation(s)
- Andrew W. Harmon
- Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Rituparna Moitra
- Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Zhili Xu
- Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Andrew P. Byrnes
- Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
- * E-mail:
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18
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Uusi-Kerttula H, Davies J, Coughlan L, Hulin-Curtis S, Jones R, Hanna L, Chester JD, Parker AL. Pseudotyped αvβ6 integrin-targeted adenovirus vectors for ovarian cancer therapies. Oncotarget 2017; 7:27926-37. [PMID: 27056886 PMCID: PMC5053699 DOI: 10.18632/oncotarget.8545] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 03/28/2016] [Indexed: 01/02/2023] Open
Abstract
Encouraging results from recent clinical trials are revitalizing the field of oncolytic virotherapies. Human adenovirus type 5 (HAdV-C5/Ad5) is a common vector for its ease of manipulation, high production titers and capacity to transduce multiple cell types. However, effective clinical applications are hindered by poor tumor-selectivity and vector neutralization. We generated Ad5/kn48 by pseudotyping Ad5 with the fiber knob domain from the less seroprevalent HAdV-D48 (Ad48). The vector was shown to utilize coxsackie and adenovirus receptor (CAR) but not CD46 for cell entry. A 20-amino acid peptide NAVPNLRGDLQVLAQKVART (A20) was inserted into the Ad5. Luc HI loop (Ad5.HI.A20) and Ad5/kn48 DG loop (Ad5/kn48.DG.A20) to target a prognostic cancer cell marker, αvβ6 integrin. Relative to the Ad5.Luc parent vector, Ad5.HI.A20, Ad5.KO1.HI.A20 (KO1, ablated CAR-binding) and Ad5/kn48.DG.A20 showed ~ 160-, 270- and 180-fold increased transduction in BT-20 breast carcinoma cells (αvβ6high). Primary human epithelial ovarian cancer (EOC) cultures derived from clinical ascites provided a useful ex vivo model for intraperitoneal virotherapy. Ad5.HI.A20, Ad5.KO1.HI.A20 and Ad5/kn48.DG.A20 transduction was ~ 70-, 60- and 16-fold increased relative to Ad5.Luc in EOC cells (αvβ6high), respectively. A20 vectors transduced EOC cells at up to ~ 950-fold higher efficiency in the presence of neutralizing ovarian ascites, as compared to Ad5.Luc. Efficient transduction and enhanced cancer-selectivity via a non-native αvβ6-mediated route was demonstrated, even in the presence of pre-existing anti-Ad5 immunity. Consequently, αvβ6-targeted Ad vectors may represent a promising platform for local intraperitoneal treatment of ovarian cancer metastases.
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Affiliation(s)
- Hanni Uusi-Kerttula
- Department of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK
| | - James Davies
- Department of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK
| | - Lynda Coughlan
- Nuffield Department of Medicine, The Jenner Institute, University of Oxford, Oxford OX3 7DQ, UK
| | - Sarah Hulin-Curtis
- Department of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK
| | | | | | - John D Chester
- Department of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK.,Velindre Cancer Centre, Cardiff CF14 2TL, UK
| | - Alan L Parker
- Department of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff CF14 4XN, UK
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19
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Duffy MR, Fisher KD, Seymour LW. Making Oncolytic Virotherapy a Clinical Reality: The European Contribution. Hum Gene Ther 2017; 28:1033-1046. [PMID: 28793793 DOI: 10.1089/hum.2017.112] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Oncolytic viruses (OVs) are quickly moving toward the forefront of modern medicines. The reward for the decades of research invested into developing viral platforms that selectively replicate in and lyse tumor cells while sparking anticancer adaptive immunity is presenting in the form of durable therapeutic responses. While this has certainly been a concerted global effort, in this review for the 25th anniversary of the European Society of Gene and Cell Therapy, we focus on the contributions made by European researchers. Research centers across Europe have held central roles in advancing OVs, from the earliest reports of coincidental viral infections leading to antitumor efficacy, to advanced mechanistic studies, and now through Phase I-III trials to imminent regulatory approvals. While challenges still remain, with limitations in preclinical animal models, antiviral immune clearance, and manufacture restrictions enforced by poor viral yields in certain cases, the field has come a very long way in recent years. Thoughtful mechanistic integration of OVs with standard of care strategies and other newly approved therapies should provide potent novel approaches. Combination with immunotherapeutic regimes holds significant promise, and the ability to arm the viral platform with therapeutic proteins for localized expression at the tumor site provides an opportunity for creating highly effective synergistic treatments and brings a new age of targeted cancer therapeutics.
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Affiliation(s)
- Margaret R Duffy
- Department of Oncology, University of Oxford , Oxford, United Kingdom
| | - Kerry D Fisher
- Department of Oncology, University of Oxford , Oxford, United Kingdom
| | - Len W Seymour
- Department of Oncology, University of Oxford , Oxford, United Kingdom
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20
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Garcia-Carbonero R, Salazar R, Duran I, Osman-Garcia I, Paz-Ares L, Bozada JM, Boni V, Blanc C, Seymour L, Beadle J, Alvis S, Champion B, Calvo E, Fisher K. Phase 1 study of intravenous administration of the chimeric adenovirus enadenotucirev in patients undergoing primary tumor resection. J Immunother Cancer 2017; 5:71. [PMID: 28923104 PMCID: PMC5604344 DOI: 10.1186/s40425-017-0277-7] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 08/14/2017] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Enadenotucirev (formerly ColoAd1) is a tumor-selective chimeric adenovirus with demonstrated preclinical activity. This phase 1 Mechanism of Action study assessed intravenous (IV) delivery of enadenotucirev in patients with resectable colorectal cancer (CRC), non-small-cell lung cancer (NSCLC), urothelial cell cancer (UCC), and renal cell cancer (RCC) with a comparator intratumoral (IT) dosed CRC patient cohort. METHODS Seventeen patients scheduled for primary tumor resection were enrolled. IT injection of enadenotucirev (CRC only) was administered as a single dose (≤ 3 × 1011 viral particles [vp]) on day 1, followed by resection during days 8-15. IV infusion of enadenotucirev was administered by three separate doses (1 × 1012 vp) on days 1, 3, and 5, followed by resection during days 8-15 (CRC) or days 10-25 (NSCLC, UCC, and RCC). Enadenotucirev activity was measured using immunohistochemical staining of nuclear viral hexon and quantitative polymerase chain reaction for viral genomic DNA. RESULTS Delivery of enadenotucirev was observed in most tumor samples following IV infusion, with little or no demonstrable activity in normal tissue. This virus delivery (by both IV and IT dosing) was accompanied by high local CD8+ cell infiltration in 80% of tested tumor samples, suggesting a potential enadenotucirev-driven immune response. Both methods of enadenotucirev delivery were well tolerated, with no treatment-associated serious adverse events. CONCLUSIONS This study provides key delivery and feasibility data to support the use of IV infusion of enadenotucirev, or therapeutic transgene-bearing derivatives of it, in clinical trials across a range of epithelial tumors, including the ongoing combination study of enadenotucirev with the checkpoint inhibitor nivolumab. It also provides insights into the potential immune-stimulating properties of enadenotucirev. TRIAL REGISTRATION This MOA study was a phase 1, multicenter, non-randomized, open-label study to investigate the administration of enadenotucirev in a preoperative setting (ClinicalTrials.gov: NCT02053220).
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MESH Headings
- Adenoviruses, Human/genetics
- Adenoviruses, Human/physiology
- Administration, Intravenous
- CD8-Positive T-Lymphocytes/metabolism
- Carcinoma, Non-Small-Cell Lung/immunology
- Carcinoma, Non-Small-Cell Lung/therapy
- Carcinoma, Renal Cell/immunology
- Carcinoma, Renal Cell/therapy
- Carcinoma, Transitional Cell/immunology
- Carcinoma, Transitional Cell/therapy
- Colorectal Neoplasms/immunology
- Colorectal Neoplasms/therapy
- Combined Modality Therapy
- DNA, Viral/genetics
- Digestive System Surgical Procedures
- Humans
- Lung Neoplasms/immunology
- Lung Neoplasms/therapy
- Oncolytic Virotherapy
- Oncolytic Viruses/genetics
- Oncolytic Viruses/physiology
- Pulmonary Surgical Procedures
- Treatment Outcome
- Urologic Surgical Procedures
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Affiliation(s)
- Rocio Garcia-Carbonero
- Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville, Spain
| | - Ramon Salazar
- Medical Oncology Department, Catalan Institute of Oncology, IDIBELL, University of Barcelona, Barcelona, Spain
| | - Ignacio Duran
- Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville, Spain
| | - Ignacio Osman-Garcia
- Unidad de Urología-Oncológica, UGC de Urología y Nefrología, Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen del Rocío/CSIC/Universidadde Sevilla, Seville, Spain
| | - Luis Paz-Ares
- Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville, Spain
| | - Juan M. Bozada
- Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville, Spain
| | - Valentina Boni
- START Madrid, Centro Integral Oncológico Clara Campal, Hospital Madrid Norte Sanchinarro, Madrid, Spain
| | | | - Len Seymour
- Department of Oncology, Oxford University, Oxford, UK
| | - John Beadle
- PsiOxus Therapeutics Limited, Milton Park, Abingdon, UK
| | - Simon Alvis
- PsiOxus Therapeutics Limited, Milton Park, Abingdon, UK
| | | | - Emiliano Calvo
- START Madrid, Centro Integral Oncológico Clara Campal, Hospital Madrid Norte Sanchinarro, Madrid, Spain
| | - Kerry Fisher
- PsiOxus Therapeutics Limited, Milton Park, Abingdon, UK
- Department of Oncology, Oxford University, Oxford, UK
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21
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Freedman JD, Hagel J, Scott EM, Psallidas I, Gupta A, Spiers L, Miller P, Kanellakis N, Ashfield R, Fisher KD, Duffy MR, Seymour LW. Oncolytic adenovirus expressing bispecific antibody targets T-cell cytotoxicity in cancer biopsies. EMBO Mol Med 2017; 9:1067-1087. [PMID: 28634161 PMCID: PMC5538299 DOI: 10.15252/emmm.201707567] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 05/15/2017] [Accepted: 05/18/2017] [Indexed: 12/21/2022] Open
Abstract
Oncolytic viruses exploit the cancer cell phenotype to complete their lytic life cycle, releasing progeny virus to infect nearby cells and repeat the process. We modified the oncolytic group B adenovirus EnAdenotucirev (EnAd) to express a bispecific single-chain antibody, secreted from infected tumour cells into the microenvironment. This bispecific T-cell engager (BiTE) binds to EpCAM on target cells and cross-links them to CD3 on T cells, leading to clustering and activation of both CD4 and CD8 T cells. BiTE transcription can be controlled by the virus major late promoter, limiting expression to cancer cells that are permissive for virus replication. This approach can potentiate the cytotoxicity of EnAd, and we demonstrate using primary pleural effusions and peritoneal malignant ascites that infection of cancer cells with the BiTE-expressing EnAd leads to activation of endogenous T cells to kill endogenous tumour cells despite the immunosuppressive environment. In this way, we have armed EnAd to combine both direct oncolysis and T cell-mediated killing, yielding a potent therapeutic that should be readily transferred into the clinic.
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Affiliation(s)
| | - Joachim Hagel
- Department of Oncology, University of Oxford, Oxford, UK
| | | | - Ioannis Psallidas
- Oxford Centre for Respiratory Medicine, Oxford University Hospitals NHS Trust, Oxford, UK
| | - Avinash Gupta
- Churchill Hospital, Oxford University Hospital NHS Trust, Oxford, UK
| | - Laura Spiers
- Churchill Hospital, Oxford University Hospital NHS Trust, Oxford, UK
| | - Paul Miller
- Churchill Hospital, Oxford University Hospital NHS Trust, Oxford, UK
| | - Nikolaos Kanellakis
- Oxford Centre for Respiratory Medicine, Oxford University Hospitals NHS Trust, Oxford, UK
| | | | - Kerry D Fisher
- Department of Oncology, University of Oxford, Oxford, UK
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22
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Illingworth S, Di Y, Bauzon M, Lei J, Duffy MR, Alvis S, Champion B, Lieber A, Hermiston T, Seymour LW, Beadle J, Fisher K. Preclinical Safety Studies of Enadenotucirev, a Chimeric Group B Human-Specific Oncolytic Adenovirus. Mol Ther Oncolytics 2017; 5:62-74. [PMID: 28480328 PMCID: PMC5415321 DOI: 10.1016/j.omto.2017.03.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 03/18/2017] [Indexed: 11/26/2022] Open
Abstract
Enadenotucirev is an oncolytic group B adenovirus identified by a process of bio-selection for the ability to selectively propagate in and rapidly kill carcinoma cells. It is resistant to inactivation by human blood components, potentially enabling intravenous dosing in patients with metastatic cancer. However, there are no known permissive animal models described for group B adenoviruses that could facilitate a conventional approach to preclinical safety studies. In this manuscript, we describe our tailored preclinical strategy designed to evaluate the key biological properties of enadenotucirev. As enadenotucirev does not replicate in animal cells, a panel of primary human cells was used to evaluate enadenotucirev replication selectivity in vitro, demonstrating that virus genome levels were >100-fold lower in normal cells relative to tumor cells. Acute intravenous tolerability in mice was used to assess virus particle-mediated toxicology and effects on innate immunity. These studies showed that particle toxicity could be ameliorated by dose fractionation, using an initial dose of virus to condition the host such that cytokine responses to subsequent doses were significantly attenuated. This, in turn, supported the initiation of a phase I intravenous clinical trial with a starting dose of 1 × 1010 virus particles given on days 1, 3, and 5.
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Affiliation(s)
| | - Ying Di
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Maxine Bauzon
- Coagulant Therapeutics, 455 Mission Bay Boulevard South, San Francisco, CA 94158, USA
| | - Janet Lei
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | | | - Simon Alvis
- PsiOxus Therapeutics Ltd., Abingdon OX14 4SD, UK
| | | | - André Lieber
- Division of Medical Genetics, University of Washington, Seattle, WA 98195, USA
| | - Terry Hermiston
- Coagulant Therapeutics, 455 Mission Bay Boulevard South, San Francisco, CA 94158, USA
| | - Len W. Seymour
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - John Beadle
- PsiOxus Therapeutics Ltd., Abingdon OX14 4SD, UK
| | - Kerry Fisher
- PsiOxus Therapeutics Ltd., Abingdon OX14 4SD, UK
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
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23
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Marino N, Illingworth S, Kodialbail P, Patel A, Calderon H, Lear R, Fisher KD, Champion BR, Brown ACN. Development of a versatile oncolytic virus platform for local intra-tumoural expression of therapeutic transgenes. PLoS One 2017; 12:e0177810. [PMID: 28542292 PMCID: PMC5436815 DOI: 10.1371/journal.pone.0177810] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 05/03/2017] [Indexed: 12/29/2022] Open
Abstract
Oncolytic viruses which infect and kill tumour cells can also be genetically modified to express therapeutic genes that augment their anti-cancer activities. Modifying oncolytic viruses to produce effective cancer therapies is challenging as encoding transgenes often attenuates virus activity or prevents systemic delivery in patients due to the risk of off-target expression of transgenes in healthy tissues. To overcome these issues we aimed to generate a readily modifiable virus platform using the oncolytic adenovirus, enadenotucirev. Enadenotucirev replicates in human tumour cells but not cells from healthy tissues and can be delivered intravenously because it is stable in human blood. Here, the enadenotucirev genome was used to generate plasmids into which synthesised transgene cassettes could be directly cloned in a single step reaction. The platform enabled generation of panels of reporter viruses to identify cloning sites and transgene cassette designs where transgene expression could be linked to the virus life cycle. It was demonstrated using these viruses that encoded transgene proteins could be successfully expressed in tumour cells in vitro and tumours in vivo. The expression of transgenes did not impact either the oncolytic activity or selective properties of the virus. The effectiveness of this approach as a drug delivery platform for complex therapeutics was demonstrated by inserting multiple genes in the virus genome to encode full length anti-VEGF antibodies. Functional antibody could be synthesised and secreted from infected tumour cells without impacting the activity of the virus particle in terms of oncolytic potency, manufacturing yields or selectivity for tumour cells. In vivo, viral particles could be efficaciously delivered intravenously to disseminated orthotopic tumours.
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Affiliation(s)
- Nalini Marino
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Sam Illingworth
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Prithvi Kodialbail
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Ashvin Patel
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Hugo Calderon
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Rochelle Lear
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Kerry D. Fisher
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Brian R. Champion
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
| | - Alice C. N. Brown
- PsiOxus Therapeutics Ltd, 154B Brook Drive, Milton Park, Abingdon, Oxfordshire, United Kingdom
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24
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Chia SL, Lei J, Ferguson DJP, Dyer A, Fisher KD, Seymour LW. Group B adenovirus enadenotucirev infects polarised colorectal cancer cells efficiently from the basolateral surface expected to be encountered during intravenous delivery to treat disseminated cancer. Virology 2017; 505:162-171. [PMID: 28260622 DOI: 10.1016/j.virol.2017.02.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/03/2017] [Accepted: 02/14/2017] [Indexed: 12/28/2022]
Abstract
Enadenotucirev (EnAd) is a group B oncolytic adenovirus developed for systemic delivery and currently undergoing clinical evaluation for advanced cancer therapy. For differentiated carcinomas, systemic delivery would likely expose virus particles to the basolateral surface of cancer cells rather than the apical surface encountered during natural infection. Here, we compare the ability of EnAd and adenovirus type-5 (Ad5) to infect polarised colorectal carcinoma cells from the apical or basolateral surfaces. Whereas Ad5 infection was more efficient via the apical than basolateral surface, EnAd readily infected cells from either surface. Progeny particles from EnAd were released preferentially via the apical surface for all cell lines and routes of infection. These data further support the utility of group B adenoviruses for systemic delivery and suggest that progeny virus are more likely to be released into the tumour rather than back through the basolateral surface into the blood stream.
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Affiliation(s)
- Suet-Lin Chia
- Department of Oncology, University of Oxford, Oxford, United Kingdom; Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Janet Lei
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - David J P Ferguson
- Nuffield Department of Clinical Laboratory Science, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
| | - Arthur Dyer
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Kerry D Fisher
- Department of Oncology, University of Oxford, Oxford, United Kingdom; PsiOxus Therapeutics, Abingdon, United Kingdom
| | - Leonard W Seymour
- Department of Oncology, University of Oxford, Oxford, United Kingdom.
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25
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Dyer A, Di Y, Calderon H, Illingworth S, Kueberuwa G, Tedcastle A, Jakeman P, Chia SL, Brown A, Silva MA, Barlow D, Beadle J, Hermiston T, Ferguson DJ, Champion B, Fisher KD, Seymour LW. Oncolytic Group B Adenovirus Enadenotucirev Mediates Non-apoptotic Cell Death with Membrane Disruption and Release of Inflammatory Mediators. Mol Ther Oncolytics 2017; 4:18-30. [PMID: 28345021 PMCID: PMC5363721 DOI: 10.1016/j.omto.2016.11.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 11/28/2016] [Indexed: 11/22/2022] Open
Abstract
Enadenotucirev (EnAd) is a chimeric group B adenovirus isolated by bioselection from a library of adenovirus serotypes. It replicates selectively in and kills a diverse range of carcinoma cells, shows effective anticancer activity in preclinical systems, and is currently undergoing phase I/II clinical trials. EnAd kills cells more quickly than type 5 adenovirus, and speed of cytotoxicity is dose dependent. The EnAd death pathway does not involve p53, is predominantly caspase independent, and appears to involve a rapid fall in cellular ATP. Infected cells show early loss of membrane integrity; increased exposure of calreticulin; extracellular release of ATP, HSP70, and HMGB1; and influx of calcium. The virus also causes an obvious single membrane blister reminiscent of ischemic cell death by oncosis. In human tumor biopsies maintained in ex vivo culture, EnAd mediated release of pro-inflammatory mediators such as TNF-α, IL-6, and HMGB1. In accordance with this, EnAd-infected tumor cells showed potent stimulation of dendritic cells and CD4+ T cells in a mixed tumor-leukocyte reaction in vitro. Whereas many viruses have evolved for efficient propagation with minimal inflammation, bioselection of EnAd for rapid killing has yielded a virus with a short life cycle that combines potent cytotoxicity with a proinflammatory mechanism of cell death.
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Affiliation(s)
- Arthur Dyer
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Ying Di
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Hugo Calderon
- PsiOxus Therapeutics, Ltd., Milton Park, Abingdon OX14 4SD, UK
| | - Sam Illingworth
- PsiOxus Therapeutics, Ltd., Milton Park, Abingdon OX14 4SD, UK
| | - Gray Kueberuwa
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Alison Tedcastle
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Phil Jakeman
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Suet Lin Chia
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Alice Brown
- PsiOxus Therapeutics, Ltd., Milton Park, Abingdon OX14 4SD, UK
| | - Michael A. Silva
- Department of Surgical Sciences, University of Oxford, Oxford OX3 9DU, UK
| | - David Barlow
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - John Beadle
- PsiOxus Therapeutics, Ltd., Milton Park, Abingdon OX14 4SD, UK
| | - Terry Hermiston
- Bayer HealthCare, 455 Mission Bay Blvd. S., San Francisco, CA 94158, USA
| | - David J.P. Ferguson
- Nuffield Department of Clinical Laboratory Science, University of Oxford, Oxford OX3 9DU, UK
| | - Brian Champion
- PsiOxus Therapeutics, Ltd., Milton Park, Abingdon OX14 4SD, UK
| | - Kerry D. Fisher
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
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26
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Seymour LW, Fisher KD. Oncolytic viruses: finally delivering. Br J Cancer 2016; 114:357-61. [PMID: 26766734 PMCID: PMC4815777 DOI: 10.1038/bjc.2015.481] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 11/29/2015] [Accepted: 12/07/2015] [Indexed: 12/13/2022] Open
Abstract
Oncolytic viruses can be found at the confluence of virology, genetic engineering and pharmacology where versatile platforms for molecularly targeted anticancer agents can be designed and optimised. Oncolytic viruses offer several important advantages over traditional approaches, including the following. (1) Amplification of the active agent (infectious virus particles) within the tumour. This avoids unnecessary exposure to normal tissues experienced during delivery of traditional stoichiometric chemotherapy and maximises the therapeutic index. (2) The active cell-killing mechanisms, often independent of programmed death mechanisms, should decrease the emergence of acquired drug resistance. (3) Lytic death of cancer cells provides a pro-inflammatory microenvironment and the potential for induction of an anticancer vaccine response. (4) Tumour-selective expression and secretion of encoded anticancer biologics, providing a new realm of potent and cost-effective-targeted therapeutics.
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Affiliation(s)
| | - Kerry D Fisher
- Department Oncology, University of Oxford, Oxford OX3 7DQ, UK
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27
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Uusi-Kerttula H, Hulin-Curtis S, Davies J, Parker AL. Oncolytic Adenovirus: Strategies and Insights for Vector Design and Immuno-Oncolytic Applications. Viruses 2015; 7:6009-42. [PMID: 26610547 PMCID: PMC4664994 DOI: 10.3390/v7112923] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/13/2015] [Accepted: 11/17/2015] [Indexed: 02/06/2023] Open
Abstract
Adenoviruses (Ad) are commonly used both experimentally and clinically, including oncolytic virotherapy applications. In the clinical area, efficacy is frequently hampered by the high rates of neutralizing immunity, estimated as high as 90% in some populations that promote vector clearance and limit bioavailability for tumor targeting following systemic delivery. Active tumor targeting is also hampered by the ubiquitous nature of the Ad5 receptor, hCAR, as well as the lack of highly tumor-selective targeting ligands and suitable targeting strategies. Furthermore, significant off-target interactions between the viral vector and cellular and proteinaceous components of the bloodstream have been documented that promote uptake into non-target cells and determine dose-limiting toxicities. Novel strategies are therefore needed to overcome the obstacles that prevent efficacious Ad deployment for wider clinical applications. The use of less seroprevalent Ad serotypes, non-human serotypes, capsid pseudotyping, chemical shielding and genetic masking by heterologous peptide incorporation are all potential strategies to achieve efficient vector escape from humoral immune recognition. Conversely, selective vector arming with immunostimulatory agents can be utilized to enhance their oncolytic potential by activation of cancer-specific immune responses against the malignant tissues. This review presents recent advantages and pitfalls occurring in the field of adenoviral oncolytic therapies.
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Affiliation(s)
- Hanni Uusi-Kerttula
- Institute of Cancer and Genetics, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
| | - Sarah Hulin-Curtis
- Institute of Cancer and Genetics, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
| | - James Davies
- Institute of Cancer and Genetics, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
| | - Alan L Parker
- Institute of Cancer and Genetics, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
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Development of Novel Adenoviral Vectors to Overcome Challenges Observed With HAdV-5-based Constructs. Mol Ther 2015; 24:6-16. [PMID: 26478249 PMCID: PMC4754553 DOI: 10.1038/mt.2015.194] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 10/07/2015] [Indexed: 12/23/2022] Open
Abstract
Recombinant vectors based on human adenovirus serotype 5 (HAdV-5) have been extensively studied in preclinical models and clinical trials over the past two decades. However, the thorough understanding of the HAdV-5 interaction with human subjects has uncovered major concerns about its product applicability. High vector-associated toxicity and widespread preexisting immunity have been shown to significantly impede the effectiveness of HAdV-5–mediated gene transfer. It is therefore that the in-depth knowledge attained working on HAdV-5 is currently being used to develop alternative vectors. Here, we provide a comprehensive overview of data obtained in recent years disqualifying the HAdV-5 vector for systemic gene delivery as well as novel strategies being pursued to overcome the limitations observed with particular emphasis on the ongoing vectorization efforts to obtain vectors based on alternative serotypes.
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