1
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Welsh OL, Roth AN, Sutherland DM, Dermody TS. Sequence polymorphisms in the reovirus σ1 attachment protein modulate encapsidation efficiency and replication in mice. J Virol 2024:e0030524. [PMID: 38771042 DOI: 10.1128/jvi.00305-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/23/2024] [Indexed: 05/22/2024] Open
Abstract
Many functions of viral attachment proteins are established, but less is known about the biological importance of viral attachment protein encapsidation efficiency. The mammalian orthoreovirus (reovirus) σ1 attachment protein forms filamentous trimers that incorporate into pentamers of the λ2 capsid protein. Reovirus strains vary in the efficiency of σ1 encapsidation onto progeny virions, which influences viral stability during entry into cells and the efficacy of tumor cell lysis. While the role of σ1 encapsidation has been evaluated in studies using cultured cells, the contribution of attachment protein encapsidation efficiency to viral infection in animals is less clear. Polymorphisms in reovirus σ1 at residues 22 and 249 have been implicated in viral dissemination in mice and susceptibility to proteolysis in the murine intestine, respectively. To determine whether these residues contribute to σ1 encapsidation efficiency, we engineered σ1 mutant viruses with single- and double-residue substitutions at sites 22 and 249. We found that substitutions at these sites alter the encapsidation of σ1 and that reoviruses encapsidating higher amounts of σ1 bind cells more avidly and have a modest replication advantage in a cell-type-specific manner relative to low σ1-encapsidating reoviruses. Furthermore, we found that a high σ1-encapsidating reovirus replicates and disseminates more efficiently in mice relative to a low σ1-encapsidating reovirus. These findings provide evidence of a relationship between viral attachment protein encapsidation efficiency and viral replication in cell culture and animal hosts. IMPORTANCE Viral attachment proteins can serve multiple functions during viral replication, including attachment to host cells, cell entry and disassembly, and modulation of host immune responses. The relationship between viral attachment protein encapsidation efficiency and viral replication in cells and animals is poorly understood. We engineered and characterized a panel of reoviruses that differ in the capacity to encapsidate the σ1 attachment protein. We found that strains encapsidating σ1 with higher efficiency bind cells more avidly and replicate and spread more efficiently in mice relative to those encapsidating σ1 with lower efficiency. These results highlight a function for σ1 attachment protein capsid abundance in viral replication in cells and animals, which may inform future use of reovirus as an oncolytic therapeutic.
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Affiliation(s)
- Olivia L Welsh
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Alexa N Roth
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Danica M Sutherland
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Terence S Dermody
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Institute of Infection, Inflammation, and Immunity, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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2
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Groeneveldt C, Kinderman P, Griffioen L, Rensing O, Labrie C, van den Wollenberg DJ, Hoeben RC, Coffey M, Loghmani H, Verdegaal EM, Welters MJ, van der Burg SH, van Hall T, van Montfoort N. Neutralizing Antibodies Impair the Oncolytic Efficacy of Reovirus but Permit Effective Combination with T cell-Based Immunotherapies. Cancer Immunol Res 2024; 12:334-349. [PMID: 38194598 PMCID: PMC10911706 DOI: 10.1158/2326-6066.cir-23-0480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 10/31/2023] [Accepted: 01/05/2024] [Indexed: 01/11/2024]
Abstract
Reovirus type 3 Dearing (Reo), manufactured for clinical application as pelareorep, is an attractive anticancer agent under evaluation in multiple phase 2 clinical trials for the treatment of solid tumors. It elicits its anticancer efficacy by inducing both oncolysis and intratumoral T-cell influx. Because most people have been preexposed to Reo, neutralizing antibodies (NAb) are prevalent in patients with cancer and might present a barrier to effective Reo therapy. Here, we tested serum of patients with cancer and healthy controls (n = 100) and confirmed that Reo NAbs are present in >80% of individuals. To investigate the effect of NAbs on both the oncolytic and the immunostimulatory efficacy of Reo, we established an experimental mouse model with Reo preexposure. The presence of preexposure-induced NAbs reduced Reo tumor infection and prevented Reo-mediated control of tumor growth after intratumoral Reo administration. In B cell-deficient mice, the lack of NAbs provided enhanced tumor growth control after Reo monotherapy, indicating that NAbs limit the oncolytic capacity of Reo. In immunocompetent mice, intratumoral T-cell influx was not affected by the presence of preexposure-induced NAbs and consequently, combinatorial immunotherapy strategies comprising Reo and T-cell engagers or checkpoint inhibitors remained effective in these settings, also after a clinically applied regimen of multiple intravenous pelareorep administrations. Altogether, our data indicate that NAbs hamper the oncolytic efficacy of Reo, but not its immunotherapeutic capacity. Given the high prevalence of seropositivity for Reo in patients with cancer, our data strongly advocate for the application of Reo as part of T cell-based immunotherapeutic strategies.
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Affiliation(s)
- Christianne Groeneveldt
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands
| | - Priscilla Kinderman
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands
| | - Lisa Griffioen
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands
| | - Olivia Rensing
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands
| | - Camilla Labrie
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands
| | | | - Rob C. Hoeben
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, the Netherlands
| | - Matt Coffey
- Oncolytics Biotech Incorporated, Calgary, Canada
| | | | - Els M.E. Verdegaal
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands
| | - Marij J.P. Welters
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands
| | - Sjoerd H. van der Burg
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands
| | - Thorbald van Hall
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands
| | - Nadine van Montfoort
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands
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3
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Cristi F, Walters M, Narayan N, Agopsowicz K, Hitt MM, Shmulevitz M. Improved oncolytic activity of a reovirus mutant that displays enhanced virus spread due to reduced cell attachment. Mol Ther Oncolytics 2023; 31:100743. [PMID: 38033400 PMCID: PMC10685048 DOI: 10.1016/j.omto.2023.100743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/31/2023] [Indexed: 12/02/2023] Open
Abstract
Wild-type reovirus serotype 3 Dearing (T3wt), a non-pathogenic intestinal virus, has shown promise as a cancer therapy in clinical trials, but it would benefit from an increased potency. Given that T3wt is naturally adapted to the intestinal environment (rather than tumors), we genetically modified reovirus to improve its infectivity in cancer cells. Various reovirus mutants were created, and their oncolytic potency was evaluated in vitro using plaque size as a measure of virus fitness in cancer cells. Notably, Super Virus 5 (SV5), carrying five oncolytic mutations, displayed the largest plaques in breast cancer cells among the mutants tested, indicating the potential for enhancing oncolytic potency through the combination of mutations. Furthermore, in a HER2+ murine breast cancer model, mice treated with SV5 exhibited superior tumor reduction and increased survival compared with those treated with PBS or T3wt. Intriguingly, SV5 did not replicate faster than T3wt in cultured cells but demonstrated a farther spread relative to T3wt, attributed to its reduced attachment to cancer cells. These findings highlight the significance of increased virus spread as a crucial mechanism for improving oncolytic virus activity. Thus, genetic modifications of reovirus hold the potential for augmenting its efficacy in cancer therapy.
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Affiliation(s)
- Francisca Cristi
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton AB T6G 2E1, Canada
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton AB T6G 2E1, Canada
- Cancer Research Institute of Northern Alberta, University of Alberta, Edmonton AB T6G 2E1, Canada
| | - Maiah Walters
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton AB T6G 2E1, Canada
| | - Nashae Narayan
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton AB T6G 2E1, Canada
| | - Kate Agopsowicz
- Department of Oncology, University of Alberta, Edmonton AB T6G 1Z2, Canada
- Cancer Research Institute of Northern Alberta, University of Alberta, Edmonton AB T6G 2E1, Canada
| | - Mary M. Hitt
- Department of Oncology, University of Alberta, Edmonton AB T6G 1Z2, Canada
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton AB T6G 2E1, Canada
- Cancer Research Institute of Northern Alberta, University of Alberta, Edmonton AB T6G 2E1, Canada
| | - Maya Shmulevitz
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton AB T6G 2E1, Canada
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton AB T6G 2E1, Canada
- Cancer Research Institute of Northern Alberta, University of Alberta, Edmonton AB T6G 2E1, Canada
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4
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Downs IL, David Ordonez Luna A, Kota KP, Rubin SK, Shirsekar SS, Ward MD, Panchal RG, Litosh VA. Modification of N-hydroxycytidine yields a novel lead compound exhibiting activity against the Venezuelan equine encephalitis virus. Bioorg Med Chem Lett 2023; 94:129432. [PMID: 37591319 DOI: 10.1016/j.bmcl.2023.129432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/27/2023] [Accepted: 08/03/2023] [Indexed: 08/19/2023]
Abstract
Nucleoside and nucleobase analogs capable of interfering with nucleic acid synthesis have played essential roles in fighting infectious diseases. However, many of these agents are associated with important and potentially lethal off-target intracellular effects that limit their use. Based on the previous discovery of base-modified 2'-deoxyuridines, which showed high anticancer activity while exhibiting lower toxicity toward rapidly dividing normal human cells compared to antimetabolite chemotherapeutics, we hypothesized that a similar modification of the N4-hydroxycytidine (NHC) molecule would provide novel antiviral compounds with diminished side effects. This presumption is due to the substantial structural difference with natural cytidine leading to less recognizability by host cell enzymes. Among the 42 antimetabolite species that have been synthesized and screened against VEEV, one hit compound was identified. The structural features of the modifying moiety were similar to those of the anticancer lead 2'-deoxyuridine derivative reported previously, providing an opportunity to pursue further structure-activity relationship (SAR) studies directed to lead improvement, and obtain insight into the mechanism of action, which can lead to identifying drug candidates against a broad spectrum of RNA viral infections.
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Affiliation(s)
- Isaac L Downs
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA
| | - A David Ordonez Luna
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA
| | - Krishna P Kota
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA
| | - Sarah K Rubin
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA
| | - Serena S Shirsekar
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA
| | - Michael D Ward
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA
| | - Rekha G Panchal
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA
| | - Vladislav A Litosh
- US Army Medical Research Institute of Infectious Diseases, 1425 Porter St., Fort Detrick, MD 21702, USA.
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5
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Robilotti E, Zeitouni NC, Orloff M. Biosafety and biohazard considerations of HSV-1-based oncolytic viral immunotherapy. Front Mol Biosci 2023; 10:1178382. [PMID: 37795219 PMCID: PMC10546393 DOI: 10.3389/fmolb.2023.1178382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 08/16/2023] [Indexed: 10/06/2023] Open
Abstract
Oncolytic viral immunotherapies are agents which can directly kill tumor cells and activate an immune response. Oncolytic viruses (OVs) range from native/unmodified viruses to genetically modified, attenuated viruses with the capacity to preferentially replicate in and kill tumors, leaving normal tissue unharmed. Talimogene laherparepvec (T-VEC) is the only OV approved for patient use in the United States; however, during the last 20 years, there have been a substantial number of clinical trials using OV immunotherapies across a broad range of cancers. Like T-VEC, many OV immunotherapies in clinical development are based on the herpes simplex virus type 1 (HSV-1), with genetic modifications for tumor selectivity, safety, and immunogenicity. Despite these modifications, HSV-1 OV immunotherapies are often treated with the same biosafety guidelines as the wild-type virus, potentially leading to reduced patient access and logistical hurdles for treatment centers, including community treatment centers and small group or private practices, and healthcare workers. Despite the lack of real-world evidence documenting possible transmission to close contacts, and in the setting of shedding and biodistribution analyses for T-VEC demonstrating limited infectivity and low risk of spread to healthcare workers, barriers to treatment with OV immunotherapies remain. With comprehensive information and educational programs, our hope is that updated biosafety guidance on OV immunotherapies will reduce logistical hurdles to ensure that patients have access to these innovative and potentially life-saving medicines across treatment settings. This work reviews a comprehensive collection of data in conjunction with the opinions of the authors based on their clinical experience to provide the suggested framework and key considerations for implementing biosafety protocols for OV immunotherapies, namely T-VEC, the only approved agent to date.
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Affiliation(s)
| | - Nathalie C. Zeitouni
- University of Arizona College of Medicine and US Dermatology Partners, Phoenix, AZ, United States
| | - Marlana Orloff
- Thomas Jefferson University Hospital, Philadelphia, PA, United States
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6
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Khalid Z, Coco S, Ullah N, Pulliero A, Cortese K, Varesano S, Orsi A, Izzotti A. Anticancer Activity of Measles-Mumps-Rubella MMR Vaccine Viruses against Glioblastoma. Cancers (Basel) 2023; 15:4304. [PMID: 37686579 PMCID: PMC10486717 DOI: 10.3390/cancers15174304] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/25/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
BACKGROUND Oncolytic viruses (OVs) have been utilized since 1990s for targeted cancer treatment. Our study examined the Measles-Mumps-Rubella (MMR) vaccine's cancer-killing potency against Glioblastoma (GBM), a therapy-resistant, aggressive cancer type. METHODOLOGY We used GBM cell lines, primary GBM cells, and normal mice microglial cells, to assess the MMR vaccine's efficacy through cell viability, cell cycle analysis, intracellular viral load via RT-PCR, and Transmission Electron Microscopy (TEM). RESULTS After 72 h of MMR treatment, GBM cell lines and primary GBM cells exhibited significant viability reduction compared to untreated cells. Conversely, normal microglial cells showed only minor changes in viability and morphology. Intracellular viral load tests indicated GBM cells' increased sensitivity to MMR viruses compared to normal cells. The cell cycle study also revealed measles and mumps viruses' crucial role in cytopathic effects, with the rubella virus causing cell cycle arrest. CONCLUSION Herein the reported results demonstrate the anti-cancer activity of the MMR vaccine against GBM cells. Accordingly, the MMR vaccine warrants further study as a potential new tool for GBM therapy and relapse prevention. Therapeutic potential of the MMR vaccine has been found to be promising in earlier studies as well.
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Affiliation(s)
- Zumama Khalid
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genoa, Italy; (Z.K.); (N.U.); (A.P.); (A.O.)
| | - Simona Coco
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (S.C.); (S.V.)
| | - Nadir Ullah
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genoa, Italy; (Z.K.); (N.U.); (A.P.); (A.O.)
| | - Alessandra Pulliero
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genoa, Italy; (Z.K.); (N.U.); (A.P.); (A.O.)
| | - Katia Cortese
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy;
| | - Serena Varesano
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (S.C.); (S.V.)
| | - Andrea Orsi
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genoa, Italy; (Z.K.); (N.U.); (A.P.); (A.O.)
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (S.C.); (S.V.)
| | - Alberto Izzotti
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (S.C.); (S.V.)
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy;
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7
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Kalafati E, Drakopoulou E, Anagnou NP, Pappa KI. Developing Oncolytic Viruses for the Treatment of Cervical Cancer. Cells 2023; 12:1838. [PMID: 37508503 PMCID: PMC10377776 DOI: 10.3390/cells12141838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/09/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Cervical cancer represents one of the most important malignancies among women worldwide. Current therapeutic approaches for cervical cancer are reported not only to be inadequate for metastatic cervical cancer, but are also considered as cytotoxic for several patients leading to serious side effects, which can have negative implications on the quality of life of women. Therefore, there is an urgent need for the development of innovative and effective treatment options. Oncolytic viruses can eventually become effective biological agents, since they preferentially infect and kill cancer cells, while leaving the normal tissue unaffected. Moreover, they are also able to leverage the host immune system response to limit tumor growth. This review aims to systematically describe and discuss the different types of oncolytic viruses generated for targeting cervical cancer cells, as well as the outcome of the combination of virotherapy with conventional therapies. Although many preclinical studies have evaluated the therapeutic efficacy of oncolytic viruses in cervical cancer, the number of clinical trials so far is limited, while their oncolytic properties are currently being tested in clinical trials for the treatment of other malignancies.
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Affiliation(s)
- Eleni Kalafati
- Laboratory of Cell and Gene Therapy, Centre of Basic Research, Biomedical Research Foundation of the Academy of Athens (BRFAA), 11527 Athens, Greece
| | - Ekati Drakopoulou
- Laboratory of Cell and Gene Therapy, Centre of Basic Research, Biomedical Research Foundation of the Academy of Athens (BRFAA), 11527 Athens, Greece
| | - Nicholas P Anagnou
- Laboratory of Cell and Gene Therapy, Centre of Basic Research, Biomedical Research Foundation of the Academy of Athens (BRFAA), 11527 Athens, Greece
| | - Kalliopi I Pappa
- Laboratory of Cell and Gene Therapy, Centre of Basic Research, Biomedical Research Foundation of the Academy of Athens (BRFAA), 11527 Athens, Greece
- First Department of Obstetrics and Gynecology, University of Athens School of Medicine, 11528 Athens, Greece
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8
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Jiang Y, Zhang H, Wang J, Chen J, Guo Z, Liu Y, Hua H. Exploiting RIG-I-like receptor pathway for cancer immunotherapy. J Hematol Oncol 2023; 16:8. [PMID: 36755342 PMCID: PMC9906624 DOI: 10.1186/s13045-023-01405-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 01/30/2023] [Indexed: 02/10/2023] Open
Abstract
RIG-I-like receptors (RLRs) are intracellular pattern recognition receptors that detect viral or bacterial infection and induce host innate immune responses. The RLRs family comprises retinoic acid-inducible gene 1 (RIG-I), melanoma differentiation-associated gene 5 (MDA5) and laboratory of genetics and physiology 2 (LGP2) that have distinctive features. These receptors not only recognize RNA intermediates from viruses and bacteria, but also interact with endogenous RNA such as the mislocalized mitochondrial RNA, the aberrantly reactivated repetitive or transposable elements in the human genome. Evasion of RLRs-mediated immune response may lead to sustained infection, defective host immunity and carcinogenesis. Therapeutic targeting RLRs may not only provoke anti-infection effects, but also induce anticancer immunity or sensitize "immune-cold" tumors to immune checkpoint blockade. In this review, we summarize the current knowledge of RLRs signaling and discuss the rationale for therapeutic targeting RLRs in cancer. We describe how RLRs can be activated by synthetic RNA, oncolytic viruses, viral mimicry and radio-chemotherapy, and how the RNA agonists of RLRs can be systemically delivered in vivo. The integration of RLRs agonism with RNA interference or CAR-T cells provides new dimensions that complement cancer immunotherapy. Moreover, we update the progress of recent clinical trials for cancer therapy involving RLRs activation and immune modulation. Further studies of the mechanisms underlying RLRs signaling will shed new light on the development of cancer therapeutics. Manipulation of RLRs signaling represents an opportunity for clinically relevant cancer therapy. Addressing the challenges in this field will help develop future generations of cancer immunotherapy.
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Affiliation(s)
- Yangfu Jiang
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
| | - Hongying Zhang
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Jiao Wang
- School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Jinzhu Chen
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Zeyu Guo
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yongliang Liu
- Laboratory of Oncogene, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Hui Hua
- Laboratory of Stem Cell Biology, West China Hospital, Sichuan University, Chengdu, 610041, China.
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9
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Groeneveldt C, van den Ende J, van Montfoort N. Preexisting immunity: Barrier or bridge to effective oncolytic virus therapy? Cytokine Growth Factor Rev 2023; 70:1-12. [PMID: 36732155 DOI: 10.1016/j.cytogfr.2023.01.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 02/01/2023]
Abstract
Oncolytic viruses (OVs) represent a highly promising treatment strategy for a wide range of cancers, by mediating both the direct killing of tumor cells as well as mobilization of antitumor immune responses. As many OVs circulate in the human population, preexisting OV-specific immune responses are prevalent. Indeed, neutralizing antibodies (NAbs) are abundantly present in the human population for commonly used OVs, such as Adenovirus type 5 (Ad5), Herpes Simplex Virus-1 (HSV-1), Vaccinia virus, Measles virus, and Reovirus. This review discusses (pre)clinical evidence regarding the effect of preexisting immunity against OVs on two distinct aspects of OV therapy; OV infection and spread, as well as the immune response induced upon OV therapy. Combined, this review provides evidence that consideration of preexisting immunity is crucial in realizing the full potential of the highly promising therapeutic implementation of OVs. Future investigation of current gaps in knowledge highlighted in this review should yield a more complete understanding of this topic, ultimately allowing for better and more personalized OV therapies.
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Affiliation(s)
- Christianne Groeneveldt
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands.
| | - Jasper van den Ende
- Master Infection & Immunity, Utrecht University, 3584 CS Utrecht, the Netherlands
| | - Nadine van Montfoort
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, 2333 ZA, Leiden, the Netherlands
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10
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Collienne M, Loghmani H, Heineman TC, Arnold D. GOBLET: a phase I/II study of pelareorep and atezolizumab +/- chemo in advanced or metastatic gastrointestinal cancers. Future Oncol 2022; 18:2871-2878. [PMID: 35796248 DOI: 10.2217/fon-2022-0453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Most gastrointestinal (GI) cancers have microsatellite-stable (MSS) tumors, which have an immunologically 'cold' phenotype with fewer genetic mutations, reduced immune cell infiltration and downregulated immune checkpoint proteins. These attributes make MSS tumors resistant to conventional immunotherapy including checkpoint blockade therapy. Pelareorep is a naturally occurring, nongenetically modified reovirus. Upon intravenous administration, pelareorep selectively kills tumor cells and promotes several immunologic changes that prime tumors to respond to checkpoint blockade therapy. Given its demonstrated synergy with checkpoint blockade, as well as its encouraging efficacy in prior GI cancer studies, pelareorep plus atezolizumab will be evaluated in the GOBLET study in multiple GI cancer indications.
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Affiliation(s)
- Maike Collienne
- Asklepios Tumorzentrum Hamburg, AK Altona, Oncology, Hematology, Palliative Care, Rheumatology, Paul-Ehrlich-Straße 1, Hamburg, 22763, Germany
| | - Houra Loghmani
- Oncolytics Biotech Inc., Suite 804, 322 - 11th Avenue SW, Calgary, Alberta, T2R 0C5, Canada
| | | | - Dirk Arnold
- Asklepios Tumorzentrum Hamburg, AK Altona, Oncology, Hematology, Palliative Care, Rheumatology, Paul-Ehrlich-Straße 1, Hamburg, 22763, Germany
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11
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Gao Y, Wu Y, Huan T, Wang X, Xu J, Xu Q, Yu F, Shi H. The application of oncolytic viruses in cancer therapy. Biotechnol Lett 2021; 43:1945-1954. [PMID: 34448096 DOI: 10.1007/s10529-021-03173-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 08/16/2021] [Indexed: 12/22/2022]
Abstract
Oncolytic therapy is a treatment method used to directly combat tumor cells by modifying the genes of naturally occurring low pathogenic viruses to form "rhizobia" virus. By taking the advantage of abnormal signal pathways in cancer cells, it selectively replicates in tumor cells leading to tumor cell lysis and death. At present, clinical studies widely employ biomolecular technology to transform oncolytic viruses to exert stronger oncolytic effects and reduce their adverse reactions. This review summarizes the current progresses and the molecular mechanism of oncolytic viruses towards tumor treatment and management.
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Affiliation(s)
- Yang Gao
- School of Life Sciences, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, People's Republic of China
| | - Yan Wu
- School of Life Sciences, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, People's Republic of China
| | - Tian Huan
- School of Life Sciences, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, People's Republic of China
| | - Xiaoyan Wang
- Department of Gastroenterology, The First People's Hospital of Suqian, Suqian, Jiangsu, People's Republic of China
| | - Jun Xu
- Department of Cognitive Neurology, China National Clinical Research Center for Neurological Diseases (NCRC-ND), Beijing Tian Tan Hospital, Affiliated to Capital Medical University, Beijing, People's Republic of China
| | - Qinggang Xu
- School of Life Sciences, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, People's Republic of China
| | - Feng Yu
- School of Life Sciences, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, People's Republic of China.
| | - Haifeng Shi
- School of Life Sciences, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu, People's Republic of China.
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12
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Roulstone V, Mansfield D, Harris RJ, Twigger K, White C, de Bono J, Spicer J, Karagiannis SN, Vile R, Pandha H, Melcher A, Harrington K. Antiviral antibody responses to systemic administration of an oncolytic RNA virus: the impact of standard concomitant anticancer chemotherapies. J Immunother Cancer 2021; 9:jitc-2021-002673. [PMID: 34301814 PMCID: PMC8728387 DOI: 10.1136/jitc-2021-002673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/05/2021] [Indexed: 01/19/2023] Open
Abstract
Background Oncolytic reovirus therapy for cancer induces a typical antiviral response to this RNA virus, including neutralizing antibodies. Concomitant treatment with cytotoxic chemotherapies has been hypothesized to improve the therapeutic potential of the virus. Chemotherapy side effects can include immunosuppression, which may slow the rate of the antiviral antibody response, as well as potentially make the patient more vulnerable to viral infection. Method Reovirus neutralizing antibody data were aggregated from separate phase I clinical trials of reovirus administered as a single agent or in combination with gemcitabine, docetaxel, carboplatin and paclitaxel doublet or cyclophosphamide. In addition, the kinetics of individual antibody isotypes were profiled in sera collected in these trials. Results These data demonstrate preserved antiviral antibody responses, with only moderately reduced kinetics with some drugs, most notably gemcitabine. All patients ultimately produced an effective neutralizing antibody response. Conclusion Patients’ responses to infection by reovirus are largely unaffected by the concomitant drug treatments tested, providing confidence that RNA viral treatment or infection is compatible with standard of care treatments.
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Affiliation(s)
| | - David Mansfield
- Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Robert J Harris
- St John's Institute of Dermatology, Guy's Hospital, London, UK
| | - Katie Twigger
- Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Christine White
- Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Johann de Bono
- Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - James Spicer
- St John's Institute of Dermatology, Guy's Hospital, London, UK
| | | | - Richard Vile
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Hardev Pandha
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Alan Melcher
- Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Kevin Harrington
- Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
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13
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Malogolovkin A, Gasanov N, Egorov A, Weener M, Ivanov R, Karabelsky A. Combinatorial Approaches for Cancer Treatment Using Oncolytic Viruses: Projecting the Perspectives through Clinical Trials Outcomes. Viruses 2021; 13:1271. [PMID: 34209981 PMCID: PMC8309967 DOI: 10.3390/v13071271] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 06/21/2021] [Accepted: 06/24/2021] [Indexed: 02/06/2023] Open
Abstract
Recent cancer immunotherapy breakthroughs have fundamentally changed oncology and revived the fading hope for a cancer cure. The immune checkpoint inhibitors (ICI) became an indispensable tool for the treatment of many malignant tumors. Alongside ICI, the application of oncolytic viruses in clinical trials is demonstrating encouraging outcomes. Dozens of combinations of oncolytic viruses with conventional radiotherapy and chemotherapy are widely used or studied, but it seems quite complicated to highlight the most effective combinations. Our review summarizes the results of clinical trials evaluating oncolytic viruses with or without genetic alterations in combination with immune checkpoint blockade, cytokines, antigens and other oncolytic viruses as well. This review is focused on the efficacy and safety of virotherapy and the most promising combinations based on the published clinical data, rather than presenting all oncolytic virus variations, which are discussed in comprehensive literature reviews. We briefly revise the research landscape of oncolytic viruses and discuss future perspectives in virus immunotherapy, in order to provide an insight for novel strategies of cancer treatment.
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Affiliation(s)
- Alexander Malogolovkin
- Gene Therapy Department, Sirius University of Science and Technology, Olympic Avenue, 1, 354340 Sochi, Russia; (N.G.); (A.E.); (M.W.); (R.I.)
| | | | | | | | | | - Alexander Karabelsky
- Gene Therapy Department, Sirius University of Science and Technology, Olympic Avenue, 1, 354340 Sochi, Russia; (N.G.); (A.E.); (M.W.); (R.I.)
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14
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Kwan A, Winder N, Muthana M. Oncolytic Virotherapy Treatment of Breast Cancer: Barriers and Recent Advances. Viruses 2021; 13:1128. [PMID: 34208264 PMCID: PMC8230950 DOI: 10.3390/v13061128] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/04/2021] [Accepted: 06/07/2021] [Indexed: 12/14/2022] Open
Abstract
Oncolytic virotherapy (OV) is an emerging class of immunotherapeutic drugs. Their mechanism of action is two-fold: direct cell lysis and unmasking of the cancer through immunogenic cell death, which allows the immune system to recognize and eradicate tumours. Breast cancer is the most common cancer in women and is challenging to treat with immunotherapy modalities because it is classically an immunogenically "cold" tumour type. This provides an attractive niche for OV, given viruses have been shown to turn "cold" tumours "hot," thereby opening a plethora of treatment opportunities. There has been a number of pre-clinical attempts to explore the use of OV in breast cancer; however, these have not led to any meaningful clinical trials. This review considers both the potential and the barriers to OV in breast cancer, namely, the limitations of monotherapy and the scope for combination therapy, improving viral delivery and challenges specific to the breast cancer population (e.g., tumour subtype, menopausal status, age).
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Affiliation(s)
| | | | - Munitta Muthana
- Department of Oncology and Metabolism, University of Sheffield Medical School, Beech Hill Road, Sheffield S10 2RX, UK; (A.K.); (N.W.)
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15
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Lin W, Zhao Y, Zhong L. Current strategies of virotherapy in clinical trials for cancer treatment. J Med Virol 2021; 93:4668-4692. [PMID: 33738818 DOI: 10.1002/jmv.26947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 02/12/2021] [Accepted: 03/15/2021] [Indexed: 12/19/2022]
Abstract
As a novel immune-active agent for cancer treatment, viruses have the ability of infecting and replicating in tumor cells. The safety and efficacy of viruses has been tested and confirmed in preclinical and clinical trials. In the last decade, virotherapy has been adopted as a monotherapy or combined therapy with immunotherapy, chemotherapy, or radiotherapy, showing promising outcomes against cancer. In this review, the current strategies of viruses used in clinical trials are classified and described. Besides this, the challenge and future prospects of virotherapy in the management for cancer patients are discussed in this review.
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Affiliation(s)
- Weijian Lin
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, China
| | - Yongxiang Zhao
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, China
| | - Liping Zhong
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, China
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16
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Oncolytic Virotherapy for Cancer: Clinical Experience. Biomedicines 2021; 9:biomedicines9040419. [PMID: 33924556 PMCID: PMC8069290 DOI: 10.3390/biomedicines9040419] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 12/22/2022] Open
Abstract
Oncolytic viruses are a new class of therapeutics which are largely in the experimental stage, with just one virus approved by the FDA thus far. While the concept of oncolytic virotherapy is not new, advancements in the fields of molecular biology and virology have renewed the interest in using viruses as oncolytic agents. Backed by robust preclinical data, many oncolytic viruses have entered clinical trials. Oncolytic viruses that have completed some levels of clinical trials or are currently undergoing clinical trials are mostly genetically engineered viruses, with the exception of some RNA viruses. Reolysin, an unmodified RNA virus is clinically the most advanced oncolytic RNA virus that has completed different phases of clinical trials. Other oncolytic viruses that have been studied in clinical trials are mostly DNA viruses that belong to one of the three families: herpesviridae, poxviridae or adenoviridae. In this review work we discuss recent clinical studies with oncolytic viruses, especially herpesvirus, poxvirus, adenovirus and reovirus. In summary, the oncolytic viruses tested so far are well tolerated, even in immune-suppressed patients. For most oncolytic viruses, mild and acceptable toxicities are seen at the currently defined highest feasible doses. However, anti-tumor efficacies of oncolytic viruses have been modest, especially when used as monotherapy. Therefore, the potency of oncolytic viruses needs to be enhanced for more oncolytic viruses to hit the clinic. Aiming to achieve higher therapeutic benefits, oncolytic viruses are currently being studied in combination with other therapies. Here we discuss the currently available clinical data on oncolytic viruses, either as monotherapy or in combination with other treatments.
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17
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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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18
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Müller L, Berkeley R, Barr T, Ilett E, Errington-Mais F. Past, Present and Future of Oncolytic Reovirus. Cancers (Basel) 2020; 12:E3219. [PMID: 33142841 PMCID: PMC7693452 DOI: 10.3390/cancers12113219] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 12/12/2022] Open
Abstract
Oncolytic virotherapy (OVT) has received significant attention in recent years, especially since the approval of talimogene Laherparepvec (T-VEC) in 2015 by the Food and Drug administration (FDA). Mechanistic studies of oncolytic viruses (OVs) have revealed that most, if not all, OVs induce direct oncolysis and stimulate innate and adaptive anti-tumour immunity. With the advancement of tumour modelling, allowing characterisation of the effects of tumour microenvironment (TME) components and identification of the cellular mechanisms required for cell death (both direct oncolysis and anti-tumour immune responses), it is clear that a "one size fits all" approach is not applicable to all OVs, or indeed the same OV across different tumour types and disease locations. This article will provide an unbiased review of oncolytic reovirus (clinically formulated as pelareorep), including the molecular and cellular requirements for reovirus oncolysis and anti-tumour immunity, reports of pre-clinical efficacy and its overall clinical trajectory. Moreover, as it is now abundantly clear that the true potential of all OVs, including reovirus, will only be reached upon the development of synergistic combination strategies, reovirus combination therapeutics will be discussed, including the limitations and challenges that remain to harness the full potential of this promising therapeutic agent.
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19
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Cook M, Chauhan A. Clinical Application of Oncolytic Viruses: A Systematic Review. Int J Mol Sci 2020; 21:ijms21207505. [PMID: 33053757 PMCID: PMC7589713 DOI: 10.3390/ijms21207505] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 09/29/2020] [Accepted: 10/03/2020] [Indexed: 02/07/2023] Open
Abstract
Leveraging the immune system to thwart cancer is not a novel strategy and has been explored via cancer vaccines and use of immunomodulators like interferons. However, it was not until the introduction of immune checkpoint inhibitors that we realized the true potential of immunotherapy in combating cancer. Oncolytic viruses are one such immunotherapeutic tool that is currently being explored in cancer therapeutics. We present the most comprehensive systematic review of all oncolytic viruses in Phase 1, 2, and 3 clinical trials published to date. We performed a systematic review of all published clinical trials indexed in PubMed that utilized oncolytic viruses. Trials were reviewed for type of oncolytic virus used, method of administration, study design, disease type, primary outcome, and relevant adverse effects. A total of 120 trials were found; 86 trials were available for our review. Included were 60 phase I trials, five phase I/II combination trials, 19 phase II trials, and two phase III clinical trials. Oncolytic viruses are feverously being evaluated in oncology with over 30 different types of oncolytic viruses being explored either as a single agent or in combination with other antitumor agents. To date, only one oncolytic virus therapy has received an FDA approval but advances in bioengineering techniques and our understanding of immunomodulation to heighten oncolytic virus replication and improve tumor kill raises optimism for its future drug development.
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Affiliation(s)
- Mary Cook
- Department of Internal Medicine, Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland Medical Center, 22 S. Greene Street, Baltimore, MD 21201, USA;
| | - Aman Chauhan
- Department of Internal Medicine-Medical Oncology, University of Kentucky, Lexington, KY 40536, USA
- Markey Cancer Center, University of Kentucky, 800 Rose Street, Lexington, KY 40536, USA
- Correspondence: ; Tel.: +504-278-0134
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20
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Berry JTL, Muñoz LE, Rodríguez Stewart RM, Selvaraj P, Mainou BA. Doxorubicin Conjugation to Reovirus Improves Oncolytic Efficacy in Triple-Negative Breast Cancer. Mol Ther Oncolytics 2020; 18:556-572. [PMID: 32995480 PMCID: PMC7493048 DOI: 10.1016/j.omto.2020.08.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 08/18/2020] [Indexed: 12/31/2022] Open
Abstract
Breast cancer is the second leading cause of cancer-related deaths in women in the United States. The triple-negative breast cancer (TNBC) subtype associates with higher rates of relapse, shorter overall survival, and aggressive metastatic disease. Hormone therapy is ineffective against TNBC, leaving patients with limited therapeutic options. Mammalian orthoreovirus (reovirus) preferentially infects and kills transformed cells, and a genetically engineered reassortant reovirus infects and kills TNBC cells more efficiently than prototypical strains. Reovirus oncolytic efficacy is further augmented by combination with topoisomerase inhibitors, including the frontline chemotherapeutic doxorubicin. However, long-term doxorubicin use correlates with toxicity to healthy tissues. Here, we conjugated doxorubicin to reovirus (reo-dox) to control drug delivery and enhance reovirus-mediated oncolysis. Our data indicate that conjugation does not impair viral biology and enhances reovirus oncolytic capacity in TNBC cells. Reo-dox infection promotes innate immune activation, and crosslinked doxorubicin retains DNA-damaging properties within infected cells. Importantly, reovirus and reo-dox significantly reduce primary TNBC tumor burden in vivo, with greater reduction in metastatic burden after reo-dox inoculation. Together, these data demonstrate that crosslinking chemotherapeutic agents to oncolytic viruses facilitates functional drug delivery to cells targeted by the virus, making it a viable approach for combination therapy against TNBC.
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Affiliation(s)
- Jameson T L Berry
- Emory University School of Medicine, Emory University, Atlanta, GA 30032, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30032, USA
| | - Luis E Muñoz
- Emory University School of Medicine, Emory University, Atlanta, GA 30032, USA
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30032, USA
| | - Roxana M Rodríguez Stewart
- Emory University School of Medicine, Emory University, Atlanta, GA 30032, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30032, USA
| | - Periasamy Selvaraj
- Emory University School of Medicine, Emory University, Atlanta, GA 30032, USA
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30032, USA
| | - Bernardo A Mainou
- Emory University School of Medicine, Emory University, Atlanta, GA 30032, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30032, USA
- Children's Healthcare of Atlanta, Atlanta, GA, 30322, USA
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21
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Chiu M, Armstrong EJL, Jennings V, Foo S, Crespo-Rodriguez E, Bozhanova G, Patin EC, McLaughlin M, Mansfield D, Baker G, Grove L, Pedersen M, Kyula J, Roulstone V, Wilkins A, McDonald F, Harrington K, Melcher A. Combination therapy with oncolytic viruses and immune checkpoint inhibitors. Expert Opin Biol Ther 2020; 20:635-652. [PMID: 32067509 DOI: 10.1080/14712598.2020.1729351] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 02/10/2020] [Indexed: 12/21/2022]
Abstract
Introduction: Immune checkpoint inhibitors (ICI) have dramatically improved the outcome for cancer patients across multiple tumor types. However the response rates to ICI monotherapy remain relatively low, in part due to some tumors cultivating an inherently 'cold' immune microenvironment. Oncolytic viruses (OV) have the capability to promote a 'hotter' immune microenvironment which can improve the efficacy of ICI.Areas covered: In this article we conducted a literature search through Pubmed/Medline to identify relevant articles in both the pre-clinical and clinical settings for combining OVs with ICIs and discuss the impact of this approach on treatment as well as changes within the tumor microenvironment. We also explore the future directions of this novel combination strategy.Expert opinion: The imminent results of the Phase 3 study combining pembrolizumab with or without T-Vec injection are eagerly awaited. OV/ICI combinations remain one of the most promising avenues to explore in the success of cancer immunotherapy.
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Affiliation(s)
- Matthew Chiu
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
- The Royal Marsden NHS Foundation Trust, London, UK
| | - Edward John Lloyd Armstrong
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
- The Royal Marsden NHS Foundation Trust, London, UK
| | - Vicki Jennings
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Shane Foo
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Eva Crespo-Rodriguez
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Galabina Bozhanova
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | | | - Martin McLaughlin
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - David Mansfield
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Gabriella Baker
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Lorna Grove
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Malin Pedersen
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Joan Kyula
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Victoria Roulstone
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - Anna Wilkins
- Tumour Cell Biology Laboratory, The Francis Crick Institute, London, UK
| | | | - Kevin Harrington
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
- The Royal Marsden NHS Foundation Trust, London, UK
| | - Alan Melcher
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
- The Royal Marsden NHS Foundation Trust, London, UK
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22
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Oncolytic immunotherapy and bortezomib synergy improves survival of refractory multiple myeloma in a preclinical model. Blood Adv 2020; 3:797-812. [PMID: 30850386 DOI: 10.1182/bloodadvances.2018025593] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 01/14/2019] [Indexed: 02/06/2023] Open
Abstract
The oncolytic reovirus (RV) has demonstrated clinical efficacy and minimal toxicity in a variety of cancers, including multiple myeloma (MM). MM is a malignancy of plasma cells that is considered treatable but incurable because of the 90% relapse rate that is primarily from drug resistance. The systemic nature of MM and the antitumor immunosuppression by its tumor microenvironment presents an ongoing therapeutic challenge. In the present study, we demonstrate that RV synergizes with the standard-of-care MM drug bortezomib (BTZ) and, importantly, enhances its therapeutic potential in therapy-resistant human MM cell lines in vitro. Using the syngeneic Vk*MYC BTZ-resistant immunocompetent transplantable MM murine model, we also demonstrate that mice harboring BTZ-insensitive MM tumors respond to the RV/BTZ combination treatment in terms of decreased tumor burden and improved overall survival (P < .00001). We demonstrate that BTZ augments RV replication in tumor-associated endothelial cells and myeloma cells, leading to enhanced viral delivery and thereby stimulating cytokine release, immune activity, apoptosis, and reduction of the MM-associated immune suppression. We conclude that combined RV/BTZ is an attractive therapeutic strategy with no safety signals for the treatment of MM.
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23
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Goel S, Ocean AJ, Parakrama RY, Ghalib MH, Chaudhary I, Shah U, Viswanathan S, Kharkwal H, Coffey M, Maitra R. Elucidation of Pelareorep Pharmacodynamics in A Phase I Trial in Patients with KRAS-Mutated Colorectal Cancer. Mol Cancer Ther 2020; 19:1148-1156. [PMID: 32156785 DOI: 10.1158/1535-7163.mct-19-1117] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 02/04/2020] [Accepted: 03/05/2020] [Indexed: 02/06/2023]
Abstract
KRAS mutation is a negative predictive biomarker of anti-EGFR agents in patients with metastatic colorectal cancer (mCRC), and remains an elusive target. Pelareorep, a double-stranded RNA virus selectively replicates in KRAS-mutated cells, and is synergistic with irinotecan. A dose escalation trial of FOLFIRI/bevacizumab [irinotecan (150-180 mg/m2) and pelareorep (1 × 1010 TCID50-3 × 1010 TCID50)] was implemented in adult patients with oxaliplatin refractory/intolerant, KRAS-mutant mCRC. Pelareorep was administered intravenously over 1 hour on days 1-5 every 4 weeks. Additional studies included pharmacokinetics, tumor morphology, and immune responses. Among FOLFIRI-naïve patients, the highest dose of FOLFIRI/bevacizumab (180 mg/m2 irinotecan) and pelareorep (3 × 1010 TCID50) was well tolerated, without a dose-limiting toxicity. At the recommended phase II dose, 3 of 6 patients (50%) had a partial response; the median progression-free and overall survival (PFS, OS) were 65.6 weeks and 25.1 months, respectively. Toxicities included myelosuppression, fatigue, and diarrhea. Transmission electron microscopy revealed viral factories (viral collections forming vesicular structures), at various stages of development. Immunogold staining against viral capsid σ-1 protein demonstrated viral "homing" in the tumor cells. The nucleus displayed sufficient euchromatin regions suggestive of active transcription. Flow cytometry revealed rapid dendritic cell maturation (48 hours) with subsequent activation of cytotoxic T cells (7 days). The combination of pelareorep with FOLFIRI/bevacizumab is safe. The PFS and OS data are encouraging and deserve further exploration. Pelareorep leads to a clear recurrent immune stimulatory response with cytotoxic T-cell activation, and homes and replicates in the tumor.
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Affiliation(s)
- Sanjay Goel
- Department of Medical Oncology, Montefiore Medical Center, Bronx, New York. .,Albert Einstein College of Medicine, Bronx, New York
| | - Allyson J Ocean
- Department of Medical Oncology, New York-Presbyterian/Weill Cornell Medical Center, New York, New York
| | - Ruwan Y Parakrama
- Department of Medical Oncology, Montefiore Medical Center, Bronx, New York
| | - Mohammad H Ghalib
- Department of Medical Oncology, Montefiore Medical Center, Bronx, New York
| | - Imran Chaudhary
- Department of Medical Oncology, Montefiore Medical Center, Bronx, New York
| | - Umang Shah
- Department of Medical Oncology, Montefiore Medical Center, Bronx, New York
| | | | - Himanshu Kharkwal
- Department of Medical Oncology, Montefiore Medical Center, Bronx, New York
| | | | - Radhashree Maitra
- Department of Medical Oncology, Montefiore Medical Center, Bronx, New York.,Albert Einstein College of Medicine, Bronx, New York
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24
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Li Y, Shen Y, Zhao R, Samudio I, Jia W, Bai X, Liang T. Oncolytic virotherapy in hepato-bilio-pancreatic cancer: The key to breaking the log jam? Cancer Med 2020; 9:2943-2959. [PMID: 32130786 PMCID: PMC7196045 DOI: 10.1002/cam4.2949] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 02/13/2020] [Accepted: 02/14/2020] [Indexed: 02/07/2023] Open
Abstract
Traditional therapies have limited efficacy in hepatocellular carcinoma, pancreatic cancer, and biliary tract cancer, especially for advanced and refractory cancers. Through a deeper understanding of antitumor immunity and the tumor microenvironment, novel immunotherapies are becoming available for cancer treatment. Oncolytic virus (OV) therapy is an emerging type of immunotherapy that has demonstrated effective antitumor efficacy in many preclinical studies and clinical studies. Thus, it may represent a potential feasible treatment for hard to treat gastrointestinal (GI) tumors. Here, we summarize the research progress of OV therapy for the treatment of hepato-bilio-pancreatic cancers. In general, most OV therapies exhibits potent, specific oncolysis both in cell lines in vitro and the animal models in vivo. Currently, several clinical trials have suggested that OV therapy may also be effective in patients with refractory hepato-bilio-pancreatic cancer. Multiple strategies such as introducing immunostimulatory genes, modifying virus capsid and combining various other therapeutic modalities have been shown enhanced specific oncolysis and synergistic anti-cancer immune stimulation. Combining OV with other antitumor therapies may become a more effective strategy than using virus alone. Nevertheless, more studies are needed to better understand the mechanisms underlying the therapeutic effects of OV, and to design appropriate dosing and combination strategies.
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Affiliation(s)
- Yuwei Li
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China.,Innovation Center for the study of Pancreatic Diseases, Hangzhou, China
| | - Yinan Shen
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China.,Innovation Center for the study of Pancreatic Diseases, Hangzhou, China
| | | | | | - William Jia
- Virogin Biotech Canada Ltd, Vancouver, Canada
| | - Xueli Bai
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China.,Innovation Center for the study of Pancreatic Diseases, Hangzhou, China
| | - Tingbo Liang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, Hangzhou, China.,Innovation Center for the study of Pancreatic Diseases, Hangzhou, China
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25
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Mondal M, Guo J, He P, Zhou D. Recent advances of oncolytic virus in cancer therapy. Hum Vaccin Immunother 2020; 16:2389-2402. [PMID: 32078405 DOI: 10.1080/21645515.2020.1723363] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Oncolytic viruses have been taking the front stage in biological therapy for cancer recently. The first and most potent virus to be used in oncolytic virotherapy is human adenovirus. Recently, ongoing extensive research has suggested that other viruses like herpes simplex virus (HSV) and measles virus can also be considered as potential candidates in cancer therapy. An HSV-based oncolytic virus, T-VEC, has completed phase Ш clinical trial and has been approved by the U.S. Food and Drug Administration (FDA) for use in biological cancer therapy. Moreover, the vaccine strain of the measles virus has shown impressive results in pre-clinical and clinical trials. Considering their therapeutic efficacy, safety, and reduced side effects, the use of such engineered viruses in biological cancer therapy has the potential to establish a milestone in cancer research. In this review, we summarize the recent clinical advances in the use of oncolytic viruses in biological therapy for cancer. Additionally, this review evaluates the potential viral candidates for their benefits and shortcomings and sheds light on the future prospects.
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Affiliation(s)
- Moumita Mondal
- Joint Center for Infection and Immunity, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University , Guangzhou, China.,Vaccine Research Center, Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences , Shanghai, China
| | - Jingao Guo
- Vaccine Research Center, Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences , Shanghai, China
| | - Ping He
- Joint Center for Infection and Immunity, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University , Guangzhou, China
| | - Dongming Zhou
- Vaccine Research Center, Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences , Shanghai, China
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26
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He H, Xu C, Cheng Z, Qian X, Zheng L. Drug Combinatorial Therapies for the Treatment of KRAS Mutated Lung Cancers. Curr Top Med Chem 2019; 19:2128-2142. [PMID: 31475900 DOI: 10.2174/1568026619666190902150555] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/23/2019] [Accepted: 07/04/2019] [Indexed: 02/08/2023]
Abstract
KRAS is the most common oncogene to be mutated in lung cancer, and therapeutics directly targeting KRAS have proven to be challenging. The mutations of KRAS are associated with poor prognosis, and resistance to both adjuvant therapy and targeted EGFR TKI. EGFR TKIs provide significant clinical benefit for patients whose tumors bear EGFR mutations. However, tumors with KRAS mutations rarely respond to the EGFR TKI therapy. Thus, combination therapy is essential for the treatment of lung cancers with KRAS mutations. EGFR TKI combined with inhibitors of MAPKs, PI3K/mTOR, HDAC, Wee1, PARP, CDK and Hsp90, even miRNAs and immunotherapy, were reviewed. Although the effects of the combination vary, the combined therapeutics are one of the best options at present to treat KRAS mutant lung cancer.
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Affiliation(s)
- Hao He
- School of Pharmacy, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Chang Xu
- National Vaccine & Serum Institute, Beijing, China
| | - Zhao Cheng
- School of Pharmacy, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Xiaoying Qian
- School of Pharmacy, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Lei Zheng
- School of Pharmacy, Xi'an Medical University, Xi'an, Shaanxi, China
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27
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Mahalingam D, Wilkinson GA, Eng KH, Fields P, Raber P, Moseley JL, Cheetham K, Coffey M, Nuovo G, Kalinski P, Zhang B, Arora SP, Fountzilas C. Pembrolizumab in Combination with the Oncolytic Virus Pelareorep and Chemotherapy in Patients with Advanced Pancreatic Adenocarcinoma: A Phase Ib Study. Clin Cancer Res 2019; 26:71-81. [PMID: 31694832 DOI: 10.1158/1078-0432.ccr-19-2078] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 08/16/2019] [Accepted: 10/09/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE Pelareorep is an intravenously delivered oncolytic reovirus that can induce a T-cell-inflamed phenotype in pancreatic ductal adenocarcinoma (PDAC). Tumor tissues from patients treated with pelareorep have shown reovirus replication, T-cell infiltration, and upregulation of PD-L1. We hypothesized that pelareorep in combination with pembrolizumab and chemotherapy in patients with PDAC would be safe and effective. PATIENTS AND METHODS A phase Ib single-arm study enrolled patients with PDAC who progressed after first-line treatment. Patients received pelareorep, pembrolizumab, and either 5-fluorouracil, gemcitabine, or irinotecan until disease progression or unacceptable toxicity. Study objectives included safety and dose-limiting toxicities, tumor response, evaluation for reovirus replication, and immune analysis in peripheral blood and tumor biopsies. RESULTS Eleven patients were enrolled. Disease control was achieved in three of the 10 efficacy-evaluable patients. One patient achieved partial response for 17.4 months. Two additional patients achieved stable disease, lasting 9 and 4 months, respectively. Treatment was well tolerated, with mostly grade 1 or 2 treatment-related adverse events, including flu-like symptoms. Viral replication was observed in on-treatment tumor biopsies. T-cell receptor sequencing from peripheral blood revealed the creation of new T-cell clones during treatment. High peripheral clonality and changes in the expression of immune genes were observed in patients with clinical benefit. CONCLUSIONS Pelareorep and pembrolizumab added to chemotherapy did not add significant toxicity and showed encouraging efficacy. Further evaluation of pelareorep and anti-PD-1 therapy is ongoing in follow-up studies. This research highlights the potential utility of several pretreatment and on-treatment biomarkers for pelareorep therapy warranting further investigation.
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Affiliation(s)
- Devalingam Mahalingam
- Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois. .,Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas
| | | | - Kevin H Eng
- Roswell Park Comprehensive Cancer Center, Buffalo, New York
| | - Paul Fields
- Adaptive Biotechnologies, Seattle, Washington
| | | | - Jennifer L Moseley
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas
| | | | - Matt Coffey
- Oncolytics Biotech Inc, Calgary, Alberta, Canada
| | - Gerard Nuovo
- Ohio State University Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, Columbus, Ohio
| | - Pawel Kalinski
- Roswell Park Comprehensive Cancer Center, Buffalo, New York
| | - Bin Zhang
- Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois
| | - Sukeshi Patel Arora
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, Texas
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28
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Lee CL, Veeramani S, Molouki A, Lim SHE, Thomas W, Chia SL, Yusoff K. Virotherapy: Current Trends and Future Prospects for Treatment of Colon and Rectal Malignancies. Cancer Invest 2019; 37:393-414. [PMID: 31502477 DOI: 10.1080/07357907.2019.1660887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Colorectal cancer (CRC) is one of the most common malignancies. In recent decades, early diagnosis and conventional therapies have resulted in a significant reduction in mortality. However, late stage metastatic disease still has very limited effective treatment options. There is a growing interest in using viruses to help target therapies to tumour sites. In recent years the evolution of immunotherapy has emphasised the importance of directing the immune system to eliminate tumour cells; we aim to give a state-of-the-art over-view of the diverse viruses that have been investigated as potential oncolytic agents for the treatment of CRC.
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Affiliation(s)
- Chin Liang Lee
- Perdana University-Royal College of Surgeons in Ireland School of Medicine (PU-RCSI) , Serdang , Malaysia
| | - Sanggeetha Veeramani
- Perdana University-Royal College of Surgeons in Ireland School of Medicine (PU-RCSI) , Serdang , Malaysia
| | - Aidin Molouki
- Department of Avian Disease Research and Diagnostics, Razi Vaccine and Serum Research Institute, Agricultural Research Education and Extension Organization (AREEO) , Karaj , Iran
| | - Swee Hua Erin Lim
- Perdana University-Royal College of Surgeons in Ireland School of Medicine (PU-RCSI) , Serdang , Malaysia.,Health Sciences Division, Abu Dhabi Women's College, Higher Colleges of Technology , Abu Dhabi , United Arab Emirates
| | - Warren Thomas
- Perdana University-Royal College of Surgeons in Ireland School of Medicine (PU-RCSI) , Serdang , Malaysia
| | - Suet Lin Chia
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universit Putra Malaysia , Serdang , Malaysia.,Institute of Bioscience, Universiti Putra Malaysia , Serdang , Malaysia
| | - Khatijah Yusoff
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universit Putra Malaysia , Serdang , Malaysia.,Institute of Bioscience, Universiti Putra Malaysia , Serdang , Malaysia
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29
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Schirrmacher V, van Gool S, Stuecker W. Breaking Therapy Resistance: An Update on Oncolytic Newcastle Disease Virus for Improvements of Cancer Therapy. Biomedicines 2019; 7:biomedicines7030066. [PMID: 31480379 PMCID: PMC6783952 DOI: 10.3390/biomedicines7030066] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/21/2019] [Accepted: 08/23/2019] [Indexed: 12/11/2022] Open
Abstract
Resistance to therapy is a major obstacle to cancer treatment. It may exist from the beginning, or it may develop during therapy. The review focusses on oncolytic Newcastle disease virus (NDV) as a biological agent with potential to break therapy resistance. This avian virus combines, upon inoculation into non-permissive hosts such as human, 12 described anti-neoplastic effects with 11 described immune stimulatory properties. Fifty years of clinical application of NDV give witness to the high safety profile of this biological agent. In 2015, an important milestone was achieved, namely the successful production of NDV according to Good Manufacturing Practice (GMP). Based on this, IOZK in Cologne, Germany, obtained a GMP certificate for the production of a dendritic cell vaccine loaded with tumor antigens from a lysate of patient-derived tumor cells together with immunological danger signals from NDV for intracutaneous application. This update includes single case reports and retrospective analyses from patients treated at IOZK. The review also presents future perspectives, including the concept of in situ vaccination and the combination of NDV or other oncolytic viruses with checkpoint inhibitors.
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Affiliation(s)
| | - Stefaan van Gool
- Immune-Oncological Center Cologne (IOZK), D-50674 Cologne, Germany
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30
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Oncolytic virotherapy – A novel strategy for cancer therapy. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2018. [DOI: 10.1016/j.ejmhg.2017.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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31
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Mahalingam D, Goel S, Aparo S, Patel Arora S, Noronha N, Tran H, Chakrabarty R, Selvaggi G, Gutierrez A, Coffey M, Nawrocki ST, Nuovo G, Mita MM. A Phase II Study of Pelareorep (REOLYSIN ®) in Combination with Gemcitabine for Patients with Advanced Pancreatic Adenocarcinoma. Cancers (Basel) 2018; 10:E160. [PMID: 29799479 PMCID: PMC6025223 DOI: 10.3390/cancers10060160] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/16/2018] [Accepted: 05/17/2018] [Indexed: 12/18/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) has a poor prognosis, with 1 and 5-year survival rates of ~18% and 7% respectively. FOLFIRINOX or gemcitabine in combination with nab-paclitaxel are standard treatment options for metastatic disease. However, both regimens are more toxic than gemcitabine alone. Pelareorep (REOLYSIN®), a proprietary isolate of reovirus Type 3 Dearing, has shown antitumor activity in clinical and preclinical models. In addition to direct cytotoxic effects, pelareorep can trigger antitumor immune responses. Due to the high frequency of RAS mutations in PDAC, we hypothesized that pelareorep would promote selective reovirus replication in pancreatic tumors and enhance the anticancer activity of gemcitabine. Chemotherapy-naïve patients with advanced PDAC were eligible for the study. The primary objective was Clinical Benefit Rate (complete response (CR) + partial response (PR) + stable disease (SD) ≥ 12 weeks) and secondary objectives include overall survival (OS), toxicity, and pharmacodynamics (PD) analysis. The study enrolled 34 patients; results included one partial response, 23 stable disease, and 5 progressive disease. The median OS was 10.2 months, with a 1- and 2-year survival rate of 45% and 24%, respectively. The treatment was well tolerated with manageable nonhematological toxicities. PD analysis revealed reovirus replication within pancreatic tumor and associated apoptosis. Upregulation of immune checkpoint marker PD-L1 suggests future consideration of combining oncolytic virus therapy with anti-PD-L1 inhibitors. We conclude that pelareorep complements single agent gemcitabine in PDAC.
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Affiliation(s)
- Devalingam Mahalingam
- Division of Hematology/Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA.
- Cancer Therapy and Research Center, University of Texas Health Science Center, San Antonio, TX 78229, USA.
| | - Sanjay Goel
- Montefiore Medical Center, New York, NY 10467, USA.
| | | | - Sukeshi Patel Arora
- Cancer Therapy and Research Center, University of Texas Health Science Center, San Antonio, TX 78229, USA.
| | | | - Hue Tran
- Oncolytics Biotech Inc., Calgary, AB T2N 1X7, Canada.
| | | | | | | | | | - Steffan T Nawrocki
- Department of Medicine, Division of Translational and Regenerative Medicine, University of Arizona Cancer Center, Tucson, AZ 85724, USA.
| | - Gerard Nuovo
- Comprehensive Cancer Center, Ohio State University, Columbus, OH and Phylogeny, Inc., Powell, OH 43065, USA.
| | - Monica M Mita
- Samuel Oschin Comprehensive Cancer Institute, Los Angeles, CA 90048, USA.
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32
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Recombinant viruses with other anti-cancer therapeutics: a step towards advancement of oncolytic virotherapy. Cancer Gene Ther 2018; 25:216-226. [PMID: 29735993 DOI: 10.1038/s41417-018-0018-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 02/23/2018] [Accepted: 03/02/2018] [Indexed: 01/15/2023]
Abstract
Cancer as a disease is a multifaceted foe which sometimes succumbs to the prescribed treatment and sometimes develops resistance against various therapies. Conventional cancer therapies suffer from many limitations, the least of which is their specificity and systemic side effects. In a majority of cases, acquired mutations render the cancer cells resistant to therapy and lower the prognostic outcome. In the constant effort to devise a therapeutic moiety which can comprehensively eliminate cancer cells, oncolytic viruses provide an attractive avenue as they selectively infect and lyse cancer cells sparing normal cells from their effects. Viruses can be engineered for their host specificity and toxicity as a promising anti-cancer tool. As it is essential to devise a strategy to address all targets involved in cancer development and progression, the idea of using oncolytic viruses with enhanced anti-cancer activity through arming with foreign genes gained merit and is showing promising advent in clinical studies. The use of oncolytic viruses as an agent of combination therapy for cancer treatment also gained much attention in the recent past. This review focuses on the emerging role of oncolytic viruses as vital components of anti-cancer regimen presenting a new dimension in an ever-changing cancer therapy scenario.
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33
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O’Bryan SM, Mathis JM. Oncolytic Virotherapy for Breast Cancer Treatment. Curr Gene Ther 2018; 18:192-205. [PMID: 30207220 PMCID: PMC7499349 DOI: 10.2174/1566523218666180910163805] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 06/20/2018] [Accepted: 09/06/2018] [Indexed: 12/24/2022]
Abstract
Breast cancer continues to be a leading cause of mortality among women. While at an early stage, localized breast cancer is easily treated; however, advanced stages of disease continue to carry a high mortality rate. The discrepancy in treatment success highlights that current treatments are insufficient to treat advanced-stage breast cancer. As new and improved treatments have been sought, one therapeutic approach has gained considerable attention. Oncolytic viruses are uniquely capable of targeting cancer cells through intrinsic or engineered means. They come in many forms, mainly from four major virus groups as defined by the Baltimore classification system. These vectors can target and kill cancer cells, and even stimulate immunotherapeutic effects in patients. This review discusses not only individual oncolytic viruses pursued in the context of breast cancer treatment but also the emergence of combination therapies with current or new therapies, which has become a particularly promising strategy for treatment of breast cancer. Overall, oncolytic virotherapy is a promising strategy for increased treatment efficacy for advanced breast cancer and consequently provides a unique platform for personalized treatments in patients.
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Affiliation(s)
- Samia M. O’Bryan
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - J. Michael Mathis
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
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34
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Hwang CC, Igase M, Sakurai M, Haraguchi T, Tani K, Itamoto K, Shimokawa T, Nakaichi M, Nemoto Y, Noguchi S, Coffey M, Okuda M, Mizuno T. Oncolytic reovirus therapy: Pilot study in dogs with spontaneously occurring tumours. Vet Comp Oncol 2017; 16:229-238. [PMID: 29076241 DOI: 10.1111/vco.12361] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 09/17/2017] [Accepted: 09/18/2017] [Indexed: 12/26/2022]
Abstract
Oncolytic virotherapy is a novel treatment involving replication-competent virus in the elimination of cancer. We have previously reported the oncolytic effects of reovirus in various canine cancer cell lines. This study aims to establish the safety profile of reovirus in dogs with spontaneously occurring tumours and to determine a recommended dosing regimen. Nineteen dogs with various tumours, mostly of advanced stages, were treated with reovirus, ranging from 1.0 × 108 to 5.0 × 109 TCID50 given as intratumour injection (IT) or intravenous infusion (IV) daily for up to 5 consecutive days in 1 or multiple treatment cycles. Adverse events (AEs) were graded according to the Veterinary Cooperative Oncology Group- Common Terminology Criteria for Adverse Events (VCOG-CTCAE) v1.1 guidelines. Viral shedding, neutralizing anti-reovirus antibody (NARA) production and immunohistochemical (IHC) detection of reovirus protein in the tumours were also assessed. AE was not observed in most dogs and events were limited to Grade I or II fever, vomiting, diarrhoea and inflammation of the injected tumour. No infectious virus was shed and all dogs had elevated NARA levels post-treatment. Although IHC results were only available in 6 dogs, 4 were detected positive for reovirus protein. In conclusion, reovirus is well-tolerated and can be given safely to tumour-bearing dogs according to the dosing regimen used in this study without significant concerns of viral shedding. Reovirus is also potentially effective in various types of canine tumours.
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Affiliation(s)
- C C Hwang
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - M Igase
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - M Sakurai
- Laboratory of Veterinary Pathology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - T Haraguchi
- Laboratory of Small Animal Clinical Science (Surgical Division), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - K Tani
- Laboratory of Veterinary Surgery, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - K Itamoto
- Laboratory of Small Animal Clinical Science (Surgical Division), Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - T Shimokawa
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - M Nakaichi
- Laboratory of Veterinary Radiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Y Nemoto
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - S Noguchi
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - M Coffey
- Oncolytics Biotech Inc, Calgary, Canada
| | - M Okuda
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan.,Biomedical Science Center for Translational Research, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
| | - T Mizuno
- Laboratory of Molecular Diagnostics and Therapeutics, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.,Biomedical Science Center for Translational Research, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan
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35
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Asad AS, Moreno Ayala MA, Gottardo MF, Zuccato C, Nicola Candia AJ, Zanetti FA, Seilicovich A, Candolfi M. Viral gene therapy for breast cancer: progress and challenges. Expert Opin Biol Ther 2017; 17:945-959. [DOI: 10.1080/14712598.2017.1338684] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Antonela S. Asad
- Departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Investigaciones Biomédicas (INBIOMED-CONICET/UBA), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mariela A. Moreno Ayala
- Departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Investigaciones Biomédicas (INBIOMED-CONICET/UBA), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - M. Florencia Gottardo
- Departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Investigaciones Biomédicas (INBIOMED-CONICET/UBA), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Camila Zuccato
- Departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Investigaciones Biomédicas (INBIOMED-CONICET/UBA), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Alejandro Javier Nicola Candia
- Departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Investigaciones Biomédicas (INBIOMED-CONICET/UBA), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Flavia A. Zanetti
- Instituto de Ciencia y Tecnología César Milstein (ICT Milstein), Unidad Ejecutora del Consejo Nacional de Investigaciones Científicas y Técnicas, Fundación Pablo Cassará, Buenos Aires, Argentina
| | - Adriana Seilicovich
- Departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Investigaciones Biomédicas (INBIOMED-CONICET/UBA), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Marianela Candolfi
- Departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Investigaciones Biomédicas (INBIOMED-CONICET/UBA), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
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36
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Review: Oncolytic virotherapy, updates and future directions. Oncotarget 2017; 8:102617-102639. [PMID: 29254276 PMCID: PMC5731986 DOI: 10.18632/oncotarget.18309] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/03/2017] [Indexed: 12/14/2022] Open
Abstract
Oncolytic viruses (OVs) are viral strains that can infect and kill malignant cells while spare their normal counterparts. OVs can access cells through binding to receptors on their surface or through fusion with the plasma membrane and establish a lytic cycle in tumors, while leaving normal tissue essentially unharmed. Multiple viruses have been investigated in humans for the past century. IMLYGIC™ (T-VEC/Talimogene Laherparepvec), a genetically engineered Herpes Simplex Virus, is the first OV approved for use in the United States and the European Union for patients with locally advanced or non-resectable melanoma. Although OVs have a favorable toxicity profile and are impressively active anticancer agents in vitro and in vivo the majority of OVs have limited clinical efficacy as a single agent. While a virus-induced antitumor immune response can enhance oncolysis, when OVs are used systemically, the antiviral immune response can prevent the virus reaching the tumor tissue and having a therapeutic effect. Intratumoral administration can provide direct access to tumor tissue and be beneficial in reducing side effects. Immune checkpoint stimulation in tumor tissue has been noted after OV therapy and can be a natural response to viral-induced oncolysis. Also for immune checkpoint inhibition to be effective in treating cancer, an immune response to tumor neoantigens and an inflamed tumor microenvironment are required, both of which treatment with an OV may provide. Therefore, direct and indirect mechanisms of tumor killing provide rationale for clinical trials investigating the combination of OVs other forms of cancer therapy, including immune checkpoint inhibition.
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African Swine Fever Virus NP868R Capping Enzyme Promotes Reovirus Rescue during Reverse Genetics by Promoting Reovirus Protein Expression, Virion Assembly, and RNA Incorporation into Infectious Virions. J Virol 2017; 91:JVI.02416-16. [PMID: 28298603 DOI: 10.1128/jvi.02416-16] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/07/2017] [Indexed: 12/25/2022] Open
Abstract
Reoviruses, like many eukaryotic viruses, contain an inverted 7-methylguanosine (m7G) cap linked to the 5' nucleotide of mRNA. The traditional functions of capping are to promote mRNA stability, protein translation, and concealment from cellular proteins that recognize foreign RNA. To address the role of mRNA capping during reovirus replication, we assessed the benefits of adding the African swine fever virus NP868R capping enzyme during reovirus rescue. C3P3, a fusion protein containing T7 RNA polymerase and NP868R, was found to increase protein expression 5- to 10-fold compared to T7 RNA polymerase alone while enhancing reovirus rescue from the current reverse genetics system by 100-fold. Surprisingly, RNA stability was not increased by C3P3, suggesting a direct effect on protein translation. A time course analysis revealed that C3P3 increased protein synthesis within the first 2 days of a reverse genetics transfection. This analysis also revealed that C3P3 enhanced processing of outer capsid μ1 protein to μ1C, a previously described hallmark of reovirus assembly. Finally, to determine the rate of infectious-RNA incorporation into new virions, we developed a new recombinant reovirus S1 gene that expressed the fluorescent protein UnaG. Following transfection of cells with UnaG and infection with wild-type virus, passage of UnaG through progeny was significantly enhanced by C3P3. These data suggest that capping provides nontraditional functions to reovirus, such as promoting assembly and infectious-RNA incorporation.IMPORTANCE Our findings expand our understanding of how viruses utilize capping, suggesting that capping provides nontraditional functions to reovirus, such as promoting assembly and infectious-RNA incorporation, in addition to enhancing protein translation. Beyond providing mechanistic insight into reovirus replication, our findings also show that reovirus reverse genetics rescue is enhanced 100-fold by the NP868R capping enzyme. Since reovirus shows promise as a cancer therapy, efficient reovirus reverse genetics rescue will accelerate production of recombinant reoviruses as candidates to enhance therapeutic potency. NP868R-assisted reovirus rescue will also expedite production of recombinant reovirus for mechanistic insights into reovirus protein function and structure.
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Junctional adhesion molecule-A is overexpressed in advanced multiple myeloma and determines response to oncolytic reovirus. Oncotarget 2016; 6:41275-89. [PMID: 26513296 PMCID: PMC4747405 DOI: 10.18632/oncotarget.5753] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 09/19/2015] [Indexed: 12/16/2022] Open
Abstract
Despite the development of several new agents for multiple myeloma (MM) therapy over the last decade, drug resistance continues to be a significant problem. Patients with relapsed/refractory disease have high mortality rates and desperately need new precision approaches that directly target specific molecular features that are prevalent in the refractory setting. Reolysin is a proprietary formulation of reovirus for cancer therapy that has demonstrated efficacy in multiple clinical trials. Its selective effects against solid tumors have been largely attributed to RAS-mediated control of reovirus replication. However, the mechanisms regulating its preferential anti-neoplastic effects in MM and other hematological malignancies have not been rigorously studied. Here we report that the reovirus receptor, junctional adhesion molecule-A (JAM-A) is highly expressed in primary cells from patients with MM and the majority of MM cell lines compared to normal controls. A series of experiments demonstrated that JAM-A expression, rather than RAS, was required for Reolysin-induced cell death in MM models. Notably, analysis of paired primary MM specimens revealed that JAM-A expression was significantly increased at relapse compared to diagnosis. Two different models of acquired resistance to bortezomib also displayed both higher JAM-A expression and elevated sensitivity to Reolysin compared to parental cells, suggesting that Reolysin may be an effective agent for patients with relapsed/refractory disease due to their high JAM-A levels. Taken together, these findings support further investigation of Reolysin for the treatment of patients with relapsed/refractory MM and of JAM-A as a predictive biomarker for sensitivity to Reolysin-induced cell death.
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Going viral: a review of replication-selective oncolytic adenoviruses. Oncotarget 2016; 6:19976-89. [PMID: 26280277 PMCID: PMC4652981 DOI: 10.18632/oncotarget.5116] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 07/09/2015] [Indexed: 12/12/2022] Open
Abstract
Oncolytic viruses have had a tumultuous course, from the initial anecdotal reports of patients having antineoplastic effects after natural viral infections a century ago to the development of current cutting-edge therapies in clinical trials. Adenoviruses have long been the workhorse of virotherapy, and we review both the scientific and the not-so-scientific forces that have shaped the development of these therapeutics from wild-type viral pathogens, turning an old foe into a new friend. After a brief review of the mechanics of viral replication and how it has been modified to engineer tumor selectivity, we give particular attention to ONYX-015, the forerunner of virotherapy with extensive clinical testing that pioneered the field. The findings from those as well as other oncolytic trials have shaped how we now view these viruses, which our immune system has evolved to vigorously attack, as promising immunotherapy agents.
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Abstract
Naturally occurring reoviruses are live replication-proficient viruses that specifically infect human cancer cells while sparing their normal counterpart. Since the discovery of reoviruses in 1950s, they have shown various degrees of safety and efficacy in pre-clinical or clinical applications for human anti-cancer therapeutics. I have recently discovered that cellular tumor suppressor genes are also important in determining reoviral tropism. Carcinogenesis is a multi-step process involving the accumulation of both oncogene and tumor suppressor gene abnormalities. Reoviruses can exploit abnormal cellular tumor suppressor signaling for their oncolytic specificity and efficacy. Many tumor suppressor genes such as p53, ataxia telangiectasia mutated (ATM), and retinoblastoma associated (RB) are known to play important roles in genomic fidelity/maintenance. Thus, a tumor suppressor gene abnormality could affect host genomic integrity and likely disrupt intact antiviral networks due to the accumulation of genetic defects which in turn could result in oncolytic reovirus susceptibility. This review outlines the discovery of oncolytic reovirus strains, recent progresses in elucidating the molecular connection between oncogene/tumor suppressor gene abnormalities and reoviral oncotropism, and their clinical implications. Future directions in the utility of reovirus virotherapy is also proposed in this review.
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Affiliation(s)
- Manbok Kim
- Department of Medical Science, Dankook University College of Medicine, Cheonan 31116, Korea
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Randomized Phase 2 Trial of the Oncolytic Virus Pelareorep (Reolysin) in Upfront Treatment of Metastatic Pancreatic Adenocarcinoma. Mol Ther 2016; 24:1150-1158. [PMID: 27039845 PMCID: PMC4923331 DOI: 10.1038/mt.2016.66] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 03/24/2016] [Indexed: 12/13/2022] Open
Abstract
Pelareorep causes oncolysis in tumor cells with activated Ras. We hypothesized that pelareorep would have efficacy and immunomodulatory activity in metastatic pancreatic adenocarcinoma (MPA) when combined with carboplatin and paclitaxel. A randomized phase 2 study (NCT01280058) was conducted in treatment-naive patients with MPA randomized to two treatment arms: paclitaxel/carboplatin + pelareorep (Arm A, n = 36 evaluable patients) versus paclitaxel/carboplatin (Arm B, n = 37 evaluable patients). There was no difference in progression-free survival (PFS) between the arms (Arm A PFS = 4.9 months, Arm B PFS = 5.2 months, P = 0.6), and Kirsten rat sarcoma viral oncogene (KRAS) status did not impact outcome. Quality-adjusted Time without Symptoms or Toxicity analysis revealed that the majority of PFS time was without toxicity or progression (4.3 months). Patient immunophenotype appeared important, as soluble immune biomarkers were associated with treatment outcome (fractalkine, interleukin (IL)-6, IL-8, regulated on activation, normal T cell expressed and secreted (RANTES), and vascular endothelial growth factor (VEGF)). Increased circulating T and natural killer (NK)-cell subsets were also significantly associated with treatment outcome. Addition of pelareorep was associated with higher levels of 14 proinflammatory plasma cytokines/chemokines and cells with an immunosuppressive phenotype (Tregs, cytotoxic T lymphocyte associated protein 4 (CTLA4)(+) T cells). Overall, pelareorep was safe but does not improve PFS when administered with carboplatin/paclitaxel, regardless of KRAS mutational status. Immunologic studies suggest that chemotherapy backbone improves immune reconstitution and that targeting remaining immunosuppressive mediators may improve oncolytic virotherapy.
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Zhao X, Chester C, Rajasekaran N, He Z, Kohrt HE. Strategic Combinations: The Future of Oncolytic Virotherapy with Reovirus. Mol Cancer Ther 2016; 15:767-73. [PMID: 27197256 DOI: 10.1158/1535-7163.mct-15-0695] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 11/11/2015] [Indexed: 11/16/2022]
Abstract
The dominant cancer treatment modalities such as chemotherapy, radiotherapy, and even targeted kinase inhibitors and mAbs are limited by low efficacy, toxicity, and treatment-resistant tumor subclones. Oncolytic viral therapy offers a novel therapeutic strategy that has the potential to dramatically improve clinical outcomes. Reovirus, a double-stranded benign human RNA virus, is a leading candidate for therapeutic development and currently in phase III trials. Reovirus selectively targets transformed cells with activated Ras signaling pathways; Ras genes are some of the most frequently mutated oncogenes in human cancer and it is estimated that at least 30% of all human tumors exhibit aberrant Ras signaling. By targeting Ras-activated cells, reovirus can directly lyse cancer cells, disrupt tumor immunosuppressive mechanisms, reestablish multicellular immune surveillance, and generate robust antitumor responses. Reovirus therapy is currently being tested in combination with radiotherapy, chemotherapy, immunotherapy, and surgery. In this review, we discuss the current successes of these combinatorial therapeutic strategies and emphasize the importance of prioritizing combination oncolytic viral therapy as reovirus-based treatments progress in clinical development. Mol Cancer Ther; 15(5); 767-73. ©2016 AACR.
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Affiliation(s)
- Xing Zhao
- Department of Medicine, Division of Oncology, Stanford University, Stanford, California. Tissue Engineering and Stem Cells Research Center, Department of Immunology, Guizhou Medical University, Guizhou, China
| | - Cariad Chester
- Department of Medicine, Division of Oncology, Stanford University, Stanford, California. Institute for Immunity, Transplantation and Infection, Stanford University School of Medicine, Stanford, California.
| | | | - ZhiXu He
- Tissue Engineering and Stem Cells Research Center, Department of Immunology, Guizhou Medical University, Guizhou, China.
| | - Holbrook E Kohrt
- Department of Medicine, Division of Oncology, Stanford University, Stanford, California
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Moving oncolytic viruses into the clinic: clinical-grade production, purification, and characterization of diverse oncolytic viruses. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:16018. [PMID: 27088104 PMCID: PMC4822647 DOI: 10.1038/mtm.2016.18] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 01/07/2016] [Accepted: 01/12/2016] [Indexed: 12/13/2022]
Abstract
Oncolytic viruses (OVs) are unique anticancer agents based on their pleotropic modes of action, which include, besides viral tumor cell lysis, activation of antitumor immunity. A panel of diverse viruses, often genetically engineered, has advanced to clinical investigation, including phase 3 studies. This diversity of virotherapeutics not only offers interesting opportunities for the implementation of different therapeutic regimens but also poses challenges for clinical translation. Thus, manufacturing processes and regulatory approval paths need to be established for each OV individually. This review provides an overview of clinical-grade manufacturing procedures for OVs using six virus families as examples, and key challenges are discussed individually. For example, different virus features with respect to particle size, presence/absence of an envelope, and host species imply specific requirements for measures to ensure sterility, for handling, and for determination of appropriate animal models for toxicity testing, respectively. On the other hand, optimization of serum-free culture conditions, increasing virus yields, development of scalable purification strategies, and formulations guaranteeing long-term stability are challenges common to several if not all OVs. In light of the recent marketing approval of the first OV in the Western world, strategies for further upscaling OV manufacturing and optimizing product characterization will receive increasing attention.
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Gong J, Sachdev E, Mita AC, Mita MM. Clinical development of reovirus for cancer therapy: An oncolytic virus with immune-mediated antitumor activity. World J Methodol 2016; 6:25-42. [PMID: 27019795 PMCID: PMC4804250 DOI: 10.5662/wjm.v6.i1.25] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 01/26/2016] [Accepted: 02/17/2016] [Indexed: 02/06/2023] Open
Abstract
Reovirus is a double-stranded RNA virus with demonstrated oncolysis or preferential replication in cancer cells. The oncolytic properties of reovirus appear to be dependent, in part, on activated Ras signaling. In addition, Ras-transformation promotes reovirus oncolysis by affecting several steps of the viral life cycle. Reovirus-mediated immune responses can present barriers to tumor targeting, serve protective functions against reovirus systemic toxicity, and contribute to therapeutic efficacy through antitumor immune-mediated effects via innate and adaptive responses. Preclinical studies have demonstrated the broad anticancer activity of wild-type, unmodified type 3 Dearing strain reovirus (Reolysin®) across a spectrum of malignancies. The development of reovirus as an anticancer agent and available clinical data reported from 22 clinical trials will be reviewed.
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Simpson GR, Relph K, Harrington K, Melcher A, Pandha H. Cancer immunotherapy via combining oncolytic virotherapy with chemotherapy: recent advances. Oncolytic Virother 2016; 5:1-13. [PMID: 27579292 PMCID: PMC4996257 DOI: 10.2147/ov.s66083] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Oncolytic viruses are multifunctional anticancer agents with huge clinical potential, and have recently passed the randomized Phase III clinical trial hurdle. Both wild-type and engineered viruses have been selected for targeting of specific cancers, to elicit cytotoxicity, and also to generate antitumor immunity. Single-agent oncolytic virotherapy treatments have resulted in modest effects in the clinic. There is increasing interest in their combination with cytotoxic agents, radiotherapy and immune-checkpoint inhibitors. Similarly to oncolytic viruses, the benefits of chemotherapeutic agents may be that they induce systemic antitumor immunity through the induction of immunogenic cell death of cancer cells. Combining these two treatment modalities has to date resulted in significant potential in vitro and in vivo synergies through various mechanisms without any apparent additional toxicities. Chemotherapy has been and will continue to be integral to the management of advanced cancers. This review therefore focuses on the potential for a number of common cytotoxic agents to be combined with clinically relevant oncolytic viruses. In many cases, this combined approach has already advanced to the clinical trial arena.
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Affiliation(s)
- Guy R Simpson
- Department of Clinical and Experimental Medicine, Targeted Cancer Therapy, Faculty of Health and Medical Sciences, University of Surrey, Guildford
| | - Kate Relph
- Department of Clinical and Experimental Medicine, Targeted Cancer Therapy, Faculty of Health and Medical Sciences, University of Surrey, Guildford
| | - Kevin Harrington
- Targeted Therapy, The Institute of Cancer Research/The Royal Marsden NIHR Biomedical Research Centre, London
| | - Alan Melcher
- Targeted and Biological Therapies, Oncology and Clinical Research, Leeds Institute of Cancer and Pathology, Faculty of Medicine and Health, University of Leeds, Leeds, UK
| | - Hardev Pandha
- Department of Clinical and Experimental Medicine, Targeted Cancer Therapy, Faculty of Health and Medical Sciences, University of Surrey, Guildford
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Villalona-Calero MA, Lam E, Otterson GA, Zhao W, Timmons M, Subramaniam D, Hade EM, Gill GM, Coffey M, Selvaggi G, Bertino E, Chao B, Knopp MV. Oncolytic reovirus in combination with chemotherapy in metastatic or recurrent non-small cell lung cancer patients with KRAS-activated tumors. Cancer 2015; 122:875-83. [PMID: 26709987 DOI: 10.1002/cncr.29856] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/12/2015] [Accepted: 11/17/2015] [Indexed: 12/21/2022]
Abstract
BACKGROUND The type 3 Dearing reovirus (Reolysin) is a naturally occurring virus that preferentially infects and causes oncolysis in tumor cells with a Ras-activated pathway. It induces host immunity and cell cycle arrest and acts synergistically with cytotoxic agents. METHODS This study evaluated Reolysin combined with paclitaxel and carboplatin in patients with metastatic/recurrent KRAS-mutated or epidermal growth factor receptor (EGFR)-mutated/amplified non-small cell lung cancer. RESULTS Thirty-seven patients were treated. Molecular alterations included 20 KRAS mutations, 10 EGFR amplifications, 3 EGFR mutations, and 4 BRAF-V600E mutations. In total, 242 cycles (median, 4; range, 1-47) were completed. The initial doses were area under the curve (AUC) 6 mg/mL/min for carboplatin, 200 mg/m(2) for paclitaxel on day 1, and 3 × 10(10) 50% tissue culture infective dose for Reolysin on days 1 to 5 of each 21-day cycle. Because of diarrhea and febrile neutropenia (in the first 2 patients), subsequent doses were reduced to 175 mg/m(2) for paclitaxel and AUC 5 mg/mL/min for carboplatin. Toxicities included fatigue, diarrhea, nausea/vomiting, neutropenia, arthralgia/myalgia, anorexia, and electrolyte abnormalities. Response Evaluation Criteria in Solid Tumors 1.0 responses included the following: partial response for 11 patients, stable disease (SD) for 20 patients, progressive disease for 4 patients, and not evaluable for 2 patients (objective response rate, 31%; 90% 1-sided lower confidence interval, 21%). Four SD patients had >40% positron emission tomography standardized uptake value reductions. The median progression-free survival, median overall survival, and 12-month overall survival rate were 4 months, 13.1 months, and 57%, respectively. Seven patients were alive after a median follow-up of 34.2 months; they included 2 patients without disease progression at 37 and 50 months. CONCLUSIONS Reolysin in combination with paclitaxel and carboplatin was well tolerated. The observed response rate suggests a benefit of the reovirus for chemotherapy. A follow-up randomized study is recommended. The proportion of patients surviving longer than 2 years (30%) suggests a second/third-line treatment effect or possibly the triggering of an immune response after tumor reovirus infiltration.
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Affiliation(s)
- Miguel A Villalona-Calero
- Division of Medical Oncology, Department of Internal Medicine, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Elaine Lam
- Division of Medical Oncology, Department of Internal Medicine, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Gregory A Otterson
- Division of Medical Oncology, Department of Internal Medicine, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Weiqiang Zhao
- Department of Pathology, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Matthew Timmons
- Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | | | - Erinn M Hade
- Center for Biostatistics, Department of Biomedical Informatics, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | | | | | | | - Erin Bertino
- Division of Medical Oncology, Department of Internal Medicine, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Bo Chao
- Division of Medical Oncology, Department of Internal Medicine, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Michael V Knopp
- Department of Radiology, Ohio State University Comprehensive Cancer Center, Columbus, Ohio
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Evidence for Oncolytic Virotherapy: Where Have We Got to and Where Are We Going? Viruses 2015; 7:6291-312. [PMID: 26633468 PMCID: PMC4690862 DOI: 10.3390/v7122938] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 11/20/2015] [Accepted: 11/25/2015] [Indexed: 12/13/2022] Open
Abstract
The last few years have seen an increased interest in immunotherapy in the treatment of malignant disease. In particular, there has been significant enthusiasm for oncolytic virotherapy, with a large amount of pre-clinical data showing promise in animal models in a wide range of tumour types. How do we move forward into the clinical setting and translate something which has such potential into meaningful clinical outcomes? Here, we review how the field of oncolytic virotherapy has developed thus far and what the future may hold.
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Mohamed A, Johnston RN, Shmulevitz M. Potential for Improving Potency and Specificity of Reovirus Oncolysis with Next-Generation Reovirus Variants. Viruses 2015; 7:6251-78. [PMID: 26633466 PMCID: PMC4690860 DOI: 10.3390/v7122936] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 11/10/2015] [Accepted: 11/18/2015] [Indexed: 12/16/2022] Open
Abstract
Viruses that specifically replicate in tumor over normal cells offer promising cancer therapies. Oncolytic viruses (OV) not only kill the tumor cells directly; they also promote anti-tumor immunotherapeutic responses. Other major advantages of OVs are that they dose-escalate in tumors and can be genetically engineered to enhance potency and specificity. Unmodified wild type reovirus is a propitious OV currently in phase I–III clinical trials. This review summarizes modifications to reovirus that may improve potency and/or specificity during oncolysis. Classical genetics approaches have revealed reovirus variants with improved adaptation towards tumors or with enhanced ability to establish specific steps of virus replication and cell killing among transformed cells. The recent emergence of a reverse genetics system for reovirus has provided novel strategies to fine-tune reovirus proteins or introduce exogenous genes that could promote oncolytic activity. Over the next decade, these findings are likely to generate better-optimized second-generation reovirus vectors and improve the efficacy of oncolytic reotherapy.
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Affiliation(s)
- Adil Mohamed
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, AB T6G 2E1, Canada.
| | - Randal N Johnston
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
| | - Maya Shmulevitz
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, AB T6G 2E1, Canada.
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Abstract
Oncolytic viruses represent a new class of therapeutic agents that promote anti-tumour responses through a dual mechanism of action that is dependent on selective tumour cell killing and the induction of systemic anti-tumour immunity. The molecular and cellular mechanisms of action are not fully elucidated but are likely to depend on viral replication within transformed cells, induction of primary cell death, interaction with tumour cell antiviral elements and initiation of innate and adaptive anti-tumour immunity. A variety of native and genetically modified viruses have been developed as oncolytic agents, and the approval of the first oncolytic virus by the US Food and Drug Administration (FDA) is anticipated in the near future. This Review provides a comprehensive overview of the basic biology supporting oncolytic viruses as cancer therapeutic agents, describes oncolytic viruses in advanced clinical trials and discusses the unique challenges in the development of oncolytic viruses as a new class of drugs for the treatment of cancer.
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Affiliation(s)
- Howard L. Kaufman
- Rutgers Cancer Institute of New Jersey, 195 Little Albany Street, Room 2004, New Brunswick, 08901 New Jersey USA
| | - Frederick J. Kohlhapp
- Rutgers Cancer Institute of New Jersey, 195 Little Albany Street, Room 2004, New Brunswick, 08901 New Jersey USA
| | - Andrew Zloza
- Rutgers Cancer Institute of New Jersey, 195 Little Albany Street, Room 2004, New Brunswick, 08901 New Jersey USA
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