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Voznesenskaya A, Berggren PO, Ilegems E. Sustained heterologous gene expression in pancreatic islet organoids using adeno-associated virus serotype 8. Front Bioeng Biotechnol 2023; 11:1147244. [PMID: 37545890 PMCID: PMC10400289 DOI: 10.3389/fbioe.2023.1147244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 07/06/2023] [Indexed: 08/08/2023] Open
Abstract
Genetic modification of pancreatic islet organoids, assembled in vitro prior to transplantation is an emerging alternative to direct in vivo genetic manipulations for a number of clinical and research applications. We have previously shown that dispersion of islet cells followed by re-aggregation into islet organoids, or pseudoislets, allows for efficient transduction with viral vectors, while maintaining physiological functions of native islets. Among viruses currently used for genetic manipulations, adeno-associated viruses (AAVs) have the most attractive safety profile making them suitable for gene therapy applications. Studies reporting on pseudoislet transduction with AAVs are, however, lacking. Here, we have characterized in detail the performance of AAV serotype 8 in transduction of islet cells during pseudoislet formation in comparison with human adenovirus type 5 (AdV5). We have assessed such parameters as transduction efficiency, expression kinetics, and endocrine cell tropism of AAV8 alone or in combination with AdV5. Data provided within our study may serve as a reference point for future functional studies using AAVs for gene transfer to islet cell organoids and will facilitate further development of engineered pseudoislets of superior quality suitable for clinical transplantation.
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2
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Jennings MR, Parks RJ. Human Adenovirus Gene Expression and Replication Is Regulated through Dynamic Changes in Nucleoprotein Structure throughout Infection. Viruses 2023; 15:161. [PMID: 36680201 PMCID: PMC9863843 DOI: 10.3390/v15010161] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 12/31/2022] [Accepted: 01/03/2023] [Indexed: 01/07/2023] Open
Abstract
Human adenovirus (HAdV) is extremely common and can rapidly spread in confined populations such as daycare centers, hospitals, and retirement homes. Although HAdV usually causes only minor illness in otherwise healthy patients, HAdV can cause significant morbidity and mortality in certain populations, such as the very young, very old, or immunocompromised individuals. During infection, the viral DNA undergoes dramatic changes in nucleoprotein structure that promote the rapid expression of viral genes, replication of the DNA, and generation of thousands of new infectious virions-each process requiring a distinct complement of virus and host-encoded proteins. In this review, we summarize our current understanding of the nucleoprotein structure of HAdV DNA during the various phases of infection, the cellular proteins implicated in mediating these changes, and the role of epigenetics in HAdV gene expression and replication.
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Affiliation(s)
- Morgan R. Jennings
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Robin J. Parks
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1N 6N5, Canada
- Centre for Neuromuscular Disease, University of Ottawa, Ottawa, ON K1N 6N5, Canada
- Department of Medicine, The Ottawa Hospital, Ottawa, ON K1H 8L6, Canada
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3
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Ratan ZA, Mashrur FR, Chhoan AP, Shahriar SM, Haidere MF, Runa NJ, Kim S, Kweon DH, Hosseinzadeh H, Cho JY. Silver Nanoparticles as Potential Antiviral Agents. Pharmaceutics 2021; 13:2034. [PMID: 34959320 PMCID: PMC8705988 DOI: 10.3390/pharmaceutics13122034] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 12/31/2022] Open
Abstract
Since the early 1990s, nanotechnology has led to new horizons in nanomedicine, which encompasses all spheres of science including chemistry, material science, biology, and biotechnology. Emerging viral infections are creating severe hazards to public health worldwide, recently, COVID-19 has caused mass human casualties with significant economic impacts. Interestingly, silver nanoparticles (AgNPs) exhibited the potential to destroy viruses, bacteria, and fungi using various methods. However, developing safe and effective antiviral drugs is challenging, as viruses use host cells for replication. Designing drugs that do not harm host cells while targeting viruses is complicated. In recent years, the impact of AgNPs on viruses has been evaluated. Here, we discuss the potential role of silver nanoparticles as antiviral agents. In this review, we focus on the properties of AgNPs such as their characterization methods, antiviral activity, mechanisms, applications, and toxicity.
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Affiliation(s)
- Zubair Ahmed Ratan
- Department of Biomedical Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh; (Z.A.R.); (F.R.M.); (A.P.C.)
- School of Health and Society, University of Wollongong, Wollongong, NSW 2500, Australia;
| | - Fazla Rabbi Mashrur
- Department of Biomedical Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh; (Z.A.R.); (F.R.M.); (A.P.C.)
| | - Anisha Parsub Chhoan
- Department of Biomedical Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh; (Z.A.R.); (F.R.M.); (A.P.C.)
| | - Sadi Md. Shahriar
- Department of Materials Science and Engineering, University of California-Davis, Davis, California, CA 95616, USA;
- Department of Materials Science and Engineering, Khulna University of Engineering and Technology, Khulna 9203, Bangladesh
| | | | | | - Sunggyu Kim
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (S.K.); (D.-H.K.)
- Department of Biocosmetics, Sungkyunkwan University, Suwon 16419, Korea
| | - Dae-Hyuk Kweon
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (S.K.); (D.-H.K.)
- Department of Biocosmetics, Sungkyunkwan University, Suwon 16419, Korea
- Biomedical Institute for Convergence at SKKU (BICS), Suwon 16419, Korea
| | - Hassan Hosseinzadeh
- School of Health and Society, University of Wollongong, Wollongong, NSW 2500, Australia;
| | - Jae Youl Cho
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (S.K.); (D.-H.K.)
- Department of Biocosmetics, Sungkyunkwan University, Suwon 16419, Korea
- Biomedical Institute for Convergence at SKKU (BICS), Suwon 16419, Korea
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4
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Gokumakulapalle M, Wang L, Mei YF. Susceptibility of Dog, Hamster, and Mouse Cells to the Replication-Competent Adenovirus 11p E1/E3 Green Fluorescence Protein Vector Has Implications for the Selection of Animal Vaccine Models. Front Microbiol 2021; 12:698999. [PMID: 34777270 PMCID: PMC8578929 DOI: 10.3389/fmicb.2021.698999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 08/23/2021] [Indexed: 11/13/2022] Open
Abstract
Human adenovirus (Ad)-vectored vaccines require viruses that can internalize into host cells and express the vaccine antigen. Evaluation of the expressed antigen in animal cells is a critical step in preclinical trials of viral vaccines. Due to the species specificity of Ads, it is difficult to find a suitable animal model. Thus, in this study, we compared the efficacy of Ad 11 prototype (Ad11p)-mediated green fluorescence protein (GFP) expression in cell lines of dog (MDCK), hamster (CHO), and mouse (McCoy and C127). Although these cell lines did not express the known primary cellular receptors for Ad11p virus infection (i.e., CD46), Ad11pE1GFP could infect and express GFP with various efficacies. For instance, it manifested relatively higher GFP expression in MDCK than in CHO, McCoy, and C127. However, infection leading to efficient viral release was not observed in any of the studied cell lines. The apparent differences were attributed to particularities of mouse and hamster cell lines, which might have led to the repression of viral DNA synthesis and to the low level of GFP expression mediated by Ad11pe3GFP. Moreover, our results revealed that undetectable hexon protein hampered the assembly of virus particles in CHO and MDCK cells. Ad11p differed from Ad5 in the ability for viral DNA synthesis when infecting CHO cells. Although a defective Ad has been successfully developed for SARS-CoV-2 vaccines in clinical applications, it has been difficult to generate one that can be used as an oral SARS-CoV-2 vaccine. Fortunately, our replication-competent Ad 11p vector might solve this problem. Regarding the use of Ad-vector candidates for vaccine purposes, this study demonstrates the selection of animal cell lines and determination of suitable virus doses in in vitro experiments.
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Affiliation(s)
| | - Li Wang
- Department of Clinical Microbiology and Virology, Umeå University, Umeå, Sweden
| | - Ya-Fang Mei
- Department of Clinical Microbiology and Virology, Umeå University, Umeå, Sweden
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5
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Heterologous administration of HPV16 E7 epitope-loaded nanocomplexes inhibits tumor growth in mouse model. Int Immunopharmacol 2021; 101:108298. [PMID: 34739928 DOI: 10.1016/j.intimp.2021.108298] [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: 05/05/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 01/02/2023]
Abstract
The nanostructured complexes can result in enhanced vaccine efficacy by facilitating the distribution and uptake of antigens by antigen-presenting cells (APCs), thereby stimulating immune responses. Here, we hypothesized that either directly coating of nanoadjuvants including aluminum phosphate (AlPO4) and adenovirus (Ad) with a modified HPV16 E7 MHC-I specific epitope, RAHYNIVTF49-57, or mixing the CpG oligodeoxynucleotide (CpG-ODN) with the cationic epitope to form nanocomlexes, and their combinational therapy would enhance their anti-tumor effects in a TC-1 mouse model. The positively-charged HPV16 E7 epitope was attracted to the oppositely-charged adjuvants by electrostatic interaction to generate epitope/adjuvant nanocomplexes. We showed that coating the nanosized adjuvants with the cationic epitope increased the particles' surface charge without significant change in their size. We then tested the cellular immunogenicity and therapeutic efficacy of nanocomplexes by measuring IL-10 and IFN-γ production, the expression of CD107a as a marker of CTL response, and tumor growth inhibition. The nanocomplexes were administered either in homologous or heterologous prime-boost regimens, and heterologous immunizations including Ad/Pep-CpG/Pep, CpG/Pep-Ad/Pep, Ad/Pep-Alum/Pep, and Alum/Pep-Ad/Pep induced significantly higher levels of IL-10, IFN-γ, and CD107a-expressing CD8 T cells compared with homologous administrations. Furthermore, the tumor growth was significantly suppressed in mice receiving nanostructured complexes in the heterologous immunizations. Our study highlights the potential of the heterologous prime-boost administration of the epitope-coated nanostructures as an effective immunization strategy.
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6
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Morgan BA, Niinivaara E, Xing Z, Thompson MR, Cranston ED. Validation of a diffusion-based single droplet drying model for encapsulation of a viral-vectored vaccine using an acoustic levitator. Int J Pharm 2021; 605:120806. [PMID: 34144140 DOI: 10.1016/j.ijpharm.2021.120806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 06/11/2021] [Accepted: 06/13/2021] [Indexed: 11/18/2022]
Abstract
Development of thermally stable spray dried viral-vectored vaccine powders is dependent on the selection of a proper excipient or excipient blend for encapsulation, which can be a time and resource intensive process. In this work, a diffusion-based droplet drying model was developed to compute droplet drying time, size, and component distribution. The model predictions were validated using an acoustic levitator to dry droplets containing protein-coated or fluorescently labelled silica nanoparticles (as adenoviral vector analogues) and a range of excipient blends. Surface morphology of the dried particles was characterized by atomic force microscopy and the distribution of silica nanoparticles was quantified by confocal microscopy. The modelled distributions of adenovirus agreed with the microscopy results for three mannitol/dextran excipient blends with varying molecular weight dextrans, verifying the equations and assumptions of the model. Viral vector activity data for adenovirus in a range of (poly)saccharide/sugar alcohol formulations were also compared to the model outputs, suggesting that viral activity decreases when the model predicts increasing adenovirus concentrations near the air-solid interface. Using a validated model with excipient property inputs that are readily available in the literature can facilitate the development of viral-vectored vaccines by identifying promising excipients without the need for experimentation.
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Affiliation(s)
- Blair A Morgan
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Elina Niinivaara
- Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FI-0076 Aalto, Espoo, Finland
| | - Zhou Xing
- McMaster Immunology Research Centre and Department of Medicine, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Michael R Thompson
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Emily D Cranston
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada; Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada.
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7
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Mendes JP, Silva RJS, Berg M, Mathiasson L, Peixoto C, Alves PM, Carrondo MJT. Oncolytic virus purification with periodic counter-current chromatography. Biotechnol Bioeng 2021; 118:3522-3532. [PMID: 33818758 DOI: 10.1002/bit.27779] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 03/08/2021] [Accepted: 03/25/2021] [Indexed: 11/11/2022]
Abstract
Virus-based biologicals are one of the most promising biopharmaceuticals of the 21st century medicine and play a significant role in the development of innovative therapeutic, prophylactic, and clinical applications. Oncolytic virus manufacturing scale can range from 5 L in research and development up to 50 L for clinical studies and reach hundreds of liters for commercial scale. The inherent productivity and high integration potential of periodic counter-current chromatography (PCC) offer a transversal solution to decrease equipment footprint and the reduction of several non-value-added unit operations. We report on the design of an efficient PCC process applied to the intermediate purification of oncolytic adenovirus. The developed ion-exchange chromatographic purification method was carried out using a four-column setup for three different scenarios: (i) variation in the feedstock, (ii) potential use of a post-load washing step to improve virus recovery, and (iii) stability during extended operation. Obtained virus recoveries (57%-86%) and impurity reductions (>80% DNA, and >70% total protein) match or overcome batch purification. Regarding process stability and automation, our results show that not only the dynamic control strategy used is able to suppress perturbations in the sample inlet but also allows for unattended operation in the case of ion exchange capture.
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Affiliation(s)
- João P Mendes
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Ricardo J S Silva
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | | | | | - Cristina Peixoto
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Paula M Alves
- iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
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8
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Hamdan F, Martins B, Feodoroff M, Giannoula Y, Feola S, Fusciello M, Chiaro J, Antignani G, Grönholm M, Ylösmäki E, Cerullo V. GAMER-Ad: a novel and rapid method for generating recombinant adenoviruses. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2021; 20:625-634. [PMID: 33718513 PMCID: PMC7907680 DOI: 10.1016/j.omtm.2021.01.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 01/27/2021] [Indexed: 12/18/2022]
Abstract
Oncolytic adenoviruses have become ideal agents in the path toward treating cancer. Such viruses have been engineered to conditionally replicate in malignant cells in which certain signaling pathways have been disrupted. Other than such oncolytic properties, the viruses need to activate the immune system in order to sustain a long-term response. Therefore, oncolytic adenoviruses have been genetically modified to express various immune-stimulatory agents to achieve this. However, genetically modifying adenoviruses is very time consuming and labor intensive with the current available methods. In this paper, we describe a novel method we have called GAMER-Ad to genetically modify adenovirus genomes within 2 days. Our method entails the replacement of the gp19k gene in the E3 region with any given gene of interest (GOI) using Gibson Assembly avoiding the homologous recombination between the shuttle and the parental plasmid. In this manuscript as proof of concept we constructed and characterized three oncolytic adenoviruses expressing CXCL9, CXCL10, and interleukin-15 (IL-15). We demonstrate that our novel method is fast, reliable, and simple compared to other methods. We anticipate that our method will be used in the future to genetically engineer oncolytic but also other adenoviruses used for gene therapy as well.
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Affiliation(s)
- Firas Hamdan
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Beatriz Martins
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Michaela Feodoroff
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Yvonne Giannoula
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Sara Feola
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Manlio Fusciello
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Jacopo Chiaro
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Gabriella Antignani
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Mikaela Grönholm
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,iCAN Digital Precision Cancer Medicine Flagship, University of Helsinki, Helsinki, Finland
| | - Erkko Ylösmäki
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Vincenzo Cerullo
- Laboratory of Immunovirotherapy (IVTLab), Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.,Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.,TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,iCAN Digital Precision Cancer Medicine Flagship, University of Helsinki, Helsinki, Finland.,Department of Molecular Medicine and Medical Biotechnology and CEINGE, Naples University 24 Federico II, 80131 Naples, Italy
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9
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Deng S, Iscaro A, Zambito G, Mijiti Y, Minicucci M, Essand M, Lowik C, Muthana M, Censi R, Mezzanotte L, Di Martino P. Development of a New Hyaluronic Acid Based Redox-Responsive Nanohydrogel for the Encapsulation of Oncolytic Viruses for Cancer Immunotherapy. NANOMATERIALS 2021; 11:nano11010144. [PMID: 33435600 PMCID: PMC7827853 DOI: 10.3390/nano11010144] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/30/2020] [Accepted: 12/31/2020] [Indexed: 12/12/2022]
Abstract
Oncolytic viruses (OVs) are emerging as promising and potential anti-cancer therapeutic agents, not only able to kill cancer cells directly by selective intracellular viral replication, but also to promote an immune response against tumor. Unfortunately, the bioavailability under systemic administration of OVs is limited because of undesired inactivation caused by host immune system and neutralizing antibodies in the bloodstream. To address this issue, a novel hyaluronic acid based redox responsive nanohydrogel was developed in this study as delivery system for OVs, with the aim to protect the OVs following systemic administration. The nanohydrogel was formulated by water in oil (W/O) nanoemulsion method and cross-linked by disulfide bonds derived from the thiol groups of synthesized thiolated hyaluronic acid. One DNA OV Ad[I/PPT-E1A] and one RNA OV Rigvir® ECHO-7 were encapsulated into the developed nanohydrogel, respectively, in view of their potential of immunovirotherapy to treat cancers. The nanohydrogels showed particle size of approximately 300–400 nm and negative zeta potential of around −13 mV by dynamic light scattering (DLS). A uniform spherical shape of the nanohydrogel was observed under the scanning electron microscope (SEM) and transmission electron microscope (TEM), especially, the successfully loading of OV into nanohydrogel was revealed by TEM. The crosslinking between the hyaluronic acid chains was confirmed by the appearance of new peak assigned to disulfide bond in Raman spectrum. Furthermore, the redox responsive ability of the nanohydrogel was determined by incubating the nanohydrogel into phosphate buffered saline (PBS) pH 7.4 with 10 μM or 10 mM glutathione at 37 °C which stimulate the normal physiological environment (extracellular) or reductive environment (intracellular or tumoral). The relative turbidity of the sample was real time monitored by DLS which indicated that the nanohydrogel could rapidly degrade within 10 h in the reductive environment due to the cleavage of disulfide bonds, while maintaining the stability in the normal physiological environment after 5 days. Additionally, in vitro cytotoxicity assays demonstrated a good oncolytic activity of OVs-loaded nanohydrogel against the specific cancer cell lines. Overall, the results indicated that the developed nanohydrogel is a delivery system appropriate for viral drugs, due to its hydrophilic and porous nature, and also thanks to its capacity to maintain the stability and activity of encapsulated viruses. Thus, nanohydrogel can be considered as a promising candidate carrier for systemic administration of oncolytic immunovirotherapy.
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Affiliation(s)
- Siyuan Deng
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy; (S.D.); (R.C.)
| | - Alessandra Iscaro
- Medical School, University of Sheffield, Beech Hill Road, Sheffield S10 2RX, UK; (A.I.); (M.M.)
| | - Giorgia Zambito
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands; (G.Z.); (C.L.); (L.M.)
- Department of Molecular Genetics, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Yimin Mijiti
- Physics Division, School of Science and Technology, University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino, Italy; (Y.M.); (M.M.)
| | - Marco Minicucci
- Physics Division, School of Science and Technology, University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino, Italy; (Y.M.); (M.M.)
| | - Magnus Essand
- Department of Immunology, Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden;
| | - Clemens Lowik
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands; (G.Z.); (C.L.); (L.M.)
- Department of Molecular Genetics, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Munitta Muthana
- Medical School, University of Sheffield, Beech Hill Road, Sheffield S10 2RX, UK; (A.I.); (M.M.)
| | - Roberta Censi
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy; (S.D.); (R.C.)
| | - Laura Mezzanotte
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands; (G.Z.); (C.L.); (L.M.)
- Department of Molecular Genetics, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Piera Di Martino
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy; (S.D.); (R.C.)
- Correspondence: ; Tel.: +39-0737-40-2215
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10
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Fusion of Large Polypeptides to Human Adenovirus Type 5 Capsid Protein IX Can Compromise Virion Stability and DNA Packaging Capacity. J Virol 2020; 94:JVI.01112-20. [PMID: 32522855 DOI: 10.1128/jvi.01112-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 06/07/2020] [Indexed: 12/31/2022] Open
Abstract
The human adenovirus (HAdV) protein IX (pIX) is a minor component of the capsid that acts in part to stabilize the hexon-hexon interactions within the mature capsid. Virions lacking pIX have a reduced DNA packaging capacity and exhibit thermal instability. More recently, pIX has been developed as a platform for presentation of large polypeptides, such as fluorescent proteins or large targeting ligands, on the viral capsid. It is not known whether such modifications affect the natural ability of pIX to stabilize the HAdV virion. In this study, we show that addition of large polypeptides to pIX does not alter the natural stability of virions containing sub-wild-type-sized genomes. However, similar virions containing wild-type-sized genomes tend to genetically rearrange, likely due to selective pressure caused by virion instability as a result of compromised pIX function.IMPORTANCE Human adenovirus capsid protein IX (pIX) is involved in stabilizing the virion but has also been developed as a platform for presentation of various polypeptides on the surface of the virion. Whether such modifications affect the ability of pIX to stabilize the virion is unknown. We show that addition of large polypeptides to pIX can reduce both the DNA packaging capacity and the heat stability of the virion, which provides important guidance for the design of pIX-modified vectors.
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11
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Morgan BA, Manser M, Jeyanathan M, Xing Z, Cranston ED, Thompson MR. Effect of Shear Stresses on Adenovirus Activity and Aggregation during Atomization To Produce Thermally Stable Vaccines by Spray Drying. ACS Biomater Sci Eng 2020; 6:4304-4313. [PMID: 33463328 DOI: 10.1021/acsbiomaterials.0c00317] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Considering the substantive potential benefits of thermally stable dry powder vaccines to public health, causes for inactivation of their sensitive viral vectors during preparation require intensive study. The focus of this work was atomization of suspensions containing encapsulating excipients and a human type 5 adenovirus, involving a detailed investigation of shear stresses in the nozzle of a spray dryer. Samples were sprayed at 25 °C into falcon tubes and immediately evaluated for viral activity by in vitro testing, minimizing the confounding of thermal effects on the deactivation of the virus, although interfacial stresses could not be decoupled from shear stresses. Despite the expectations of only virus deactivation with ever-increasing shear stresses in the spray nozzle, some conditions were found to show better activity than the positive control, leading to investigations of viral aggregation. It was found that the adenovirus experienced minor aggregation when mixed with the excipient solutions, which was reversed by subjecting samples to moderate shear conditions in the spray nozzle. At very high shear rates, the activity diminished again because of damage to the viral capsid fibers, which also led to the production of new aggregates after atomization. Despite these findings, activity losses caused by shear were small compared to the overall spray drying process loss. However, formulation composition, solution viscosity, and process conditions should be considered carefully for optimization because of their impact on aggregation. This is the first known report comparing shear, aggregation, and biological activity loss during the atomization step of spray drying viral vaccines.
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Affiliation(s)
- Blair A Morgan
- Department of Chemical Engineering, McMaster University, Hamilton, L8S 4L7 Ontario, Canada
| | - Myla Manser
- Department of Chemical Engineering, McMaster University, Hamilton, L8S 4L7 Ontario, Canada
| | - Mangalakumari Jeyanathan
- McMaster Immunology Research Centre and Department of Pathology and Molecular Medicine, McMaster University, Hamilton, L8S 4L7 Ontario, Canada
| | - Zhou Xing
- McMaster Immunology Research Centre and Department of Pathology and Molecular Medicine, McMaster University, Hamilton, L8S 4L7 Ontario, Canada
| | - Emily D Cranston
- Department of Chemical Engineering, McMaster University, Hamilton, L8S 4L7 Ontario, Canada.,Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, V6T 1Z4 British Columbia, Canada.,Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, V6T 1Z3 British Columbia, Canada
| | - Michael R Thompson
- Department of Chemical Engineering, McMaster University, Hamilton, L8S 4L7 Ontario, Canada
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12
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Galante AJ, Haghanifar S, Romanowski EG, Shanks RMQ, Leu PW. Superhemophobic and Antivirofouling Coating for Mechanically Durable and Wash-Stable Medical Textiles. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22120-22128. [PMID: 32320200 DOI: 10.1021/acsami.9b23058] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Medical textiles have a need for repellency to body fluids such as blood, urine, or sweat that may contain infectious vectors that contaminate surfaces and spread to other individuals. Similarly, viral repellency has yet to be demonstrated and long-term mechanical durability is a major challenge. In this work, we demonstrate a simple, durable, and scalable coating on nonwoven polypropylene textile that is both superhemophobic and antivirofouling. The treatment consists of polytetrafluoroethylene (PTFE) nanoparticles in a solvent thermally sintered to polypropylene (PP) microfibers, which creates a robust, low-surface-energy, multilayer, and multilength scale rough surface. The treated textiles demonstrate a static contact angle of 158.3 ± 2.6° and hysteresis of 4.7 ± 1.7° for fetal bovine serum and reduce serum protein adhesion by 89.7 ± 7.3% (0.99 log). The coated textiles reduce the attachment of adenovirus type 4 and 7a virions by 99.2 ± 0.2% and 97.6 ± 0.1% (2.10 and 1.62 log), respectively, compared to noncoated controls. The treated textiles provide these repellencies by maintaining a Cassie-Baxter state of wetting where the surface area in contact with liquids is reduced by an estimated 350 times (2.54 log) compared to control textiles. Moreover, the treated textiles exhibit unprecedented mechanical durability, maintaining their liquid, protein, and viral repellency after extensive and harsh abrasion and washing. The multilayer, multilength scale roughness provides for mechanical durability through self-similarity, and the samples have high-pressure stability with a breakthrough pressure of about 255 kPa. These properties highlight the potential of durable, repellent coatings for medical gowning, scrubs, or other hygiene textile applications.
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Affiliation(s)
- Anthony J Galante
- Department of Industrial Engineering, University of Pittsburgh, 3700 O'Hara, Benedum Hall, Pittsburgh, Pennsylvania 15261, United States
| | - Sajad Haghanifar
- Department of Industrial Engineering, University of Pittsburgh, 3700 O'Hara, Benedum Hall, Pittsburgh, Pennsylvania 15261, United States
| | - Eric G Romanowski
- Department of Ophthalmology, Charles T. Campbell Laboratory for Ophthalmic Microbiology, University of Pittsburgh School of Medicine, 203 Lothrop Street, Pittsburgh, Pennsylvania 15213, United States
| | - Robert M Q Shanks
- Department of Ophthalmology, Charles T. Campbell Laboratory for Ophthalmic Microbiology, University of Pittsburgh School of Medicine, 203 Lothrop Street, Pittsburgh, Pennsylvania 15213, United States
| | - Paul W Leu
- Department of Industrial Engineering, University of Pittsburgh, 3700 O'Hara, Benedum Hall, Pittsburgh, Pennsylvania 15261, United States
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13
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Zhao M, Vandersluis M, Stout J, Haupts U, Sanders M, Jacquemart R. Affinity chromatography for vaccines manufacturing: Finally ready for prime time? Vaccine 2019; 37:5491-5503. [DOI: 10.1016/j.vaccine.2018.02.090] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 01/22/2018] [Accepted: 02/22/2018] [Indexed: 01/15/2023]
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14
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Gast M, Sobek H, Mizaikoff B. Advances in imprinting strategies for selective virus recognition a review. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.03.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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15
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Heiniö C, Sorsa S, Siurala M, Grönberg-Vähä-Koskela S, Havunen R, Haavisto E, Koski A, Hemminki O, Zafar S, Cervera-Carrascon V, Munaro E, Kanerva A, Hemminki A. Effect of Genetic Modifications on Physical and Functional Titers of Adenoviral Cancer Gene Therapy Constructs. Hum Gene Ther 2019; 30:740-752. [PMID: 30672366 DOI: 10.1089/hum.2018.240] [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: 12/26/2022] Open
Abstract
After the discovery and characterization of the adenovirus in the 1950s, this prevalent cause of the common cold and other usually mild diseases has been modified and utilized in biomedicine in several ways. To date, adenoviruses are the most frequently used vectors and therapeutic (e.g., oncolytic) agents with a number of beneficial features. They infect both dividing and nondividing cells, enable high-level, transient protein expression, and are easy to amplify to high concentrations. As an important and versatile research tool, it is of essence to understand the limits and advantages that genetic modification of adenovirus vectors may entail. Therefore, a retrospective analysis was performed of adenoviral gene therapy constructs produced in the same laboratory with similar methods. The aim was to assess the impact of various modifications on the physical and functional titer of the virus. It was found that genome size (designed within "the 105% golden rule") did not significantly affect the physical titer of the adenovirus preparations, regardless of the type of transgene (e.g., immunostimulatory vs. other), number of engineered changes, and size of the mutated virus genome. One statistically significant exception was noted, however. Chimeric adenoviruses (5/3) had a slightly lower physical titer compared to Ad5-based viruses, although a trend for the opposite was true for functional titers. Thus, 5/3 chimeric viruses may in fact be appealing from a safety versus efficacy viewpoint. Armed viruses had lower functional and physical titers than unarmed viruses, while five genomic modifications started to decrease functional titer. Importantly, even highly modified armed viruses generally had good titers compatible with clinical testing. In summary, this paper shows the plasticity of adenovirus for various vector, oncolytic, and armed oncolytic uses. These results inform future generations of adenovirus-based drugs for human use. This information is directly transferable to academic laboratories and the biomedical industry involved in vector design and production optimization.
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Affiliation(s)
- Camilla Heiniö
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Suvi Sorsa
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,2 TILT Biotherapeutics Ltd., Helsinki, Finland
| | - Mikko Siurala
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,2 TILT Biotherapeutics Ltd., Helsinki, Finland
| | | | - Riikka Havunen
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,2 TILT Biotherapeutics Ltd., Helsinki, Finland
| | | | - Anniina Koski
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Otto Hemminki
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,3 Department of Urology, Helsinki University Hospital, Helsinki, Finland
| | - Sadia Zafar
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Víctor Cervera-Carrascon
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,2 TILT Biotherapeutics Ltd., Helsinki, Finland
| | - Eleonora Munaro
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
| | - Anna Kanerva
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,4 Department of Obstetrics and Gynecology, Helsinki University Hospital, Helsinki, Finland
| | - Akseli Hemminki
- 1 Cancer Gene Therapy Group, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.,2 TILT Biotherapeutics Ltd., Helsinki, Finland.,5 Comprehensive Cancer Center, Helsinki University Hospital, Helsinki, Finland
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Abstract
Polymeric matrices inherently protect viral vectors from pre-existing immune conditions, limit dissemination to off-target sites, and can sustain vector release. Advancing methodologies in development of particulate based vehicles have led to improved encapsulation of viral vectors. Polymeric delivery systems have contributed to increasing cellular transduction, responsive release mechanisms, cellular infiltration, and cellular signaling. Synthetic polymers are easily customizable, and are capable of balancing matrix retention with cellular infiltration. Natural polymers contain inherent biorecognizable motifs adding therapeutic efficacy to the incorporated viral vector. Recombinant polymers use highly conserved motifs to carefully engineer matrices, allowing for precise design including elements of vector retention and responsive release mechanisms. Composite polymer systems provide opportunities to create matrices with unique properties. Carefully designed matrices can control spatiotemporal release patterns that synergize with approaches in regenerative medicine and antitumor therapies.
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Affiliation(s)
- Douglas Steinhauff
- Utah Center for Nanomedicine , Nano Institute of Utah , 36 South Wasatch Drive , Salt Lake City , Utah 84112 , United States
| | - Hamidreza Ghandehari
- Utah Center for Nanomedicine , Nano Institute of Utah , 36 South Wasatch Drive , Salt Lake City , Utah 84112 , United States
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17
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Wang Y, Araud E, Shisler JL, Nguyen TH, Yuan B. Influence of algal organic matter on MS2 bacteriophage inactivation by ultraviolet irradiation at 220 nm and 254 nm. CHEMOSPHERE 2019; 214:195-202. [PMID: 30265926 DOI: 10.1016/j.chemosphere.2018.09.065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 09/06/2018] [Accepted: 09/12/2018] [Indexed: 06/08/2023]
Abstract
We determined the potential interference of extracellular algal organic matter (EAOM) and intracellular algal organic matter (IAOM) extracted from Microcystis aeruginosa on MS2 bacteriophage inactivation under UV irradiation at two wavelengths (220 and 254 nm). UV irradiation at 220 nm doubled the inactivation rate of MS2 in water containing EAOM than in organic-free phosphate buffered solution. In contrast, EAOM did not change MS2 inactivation by exposure to UV 254 nm. The presence of IAOM did not significantly influence MS2 inactivation by exposure to either UV 254 or UV 220 nm. To achieve 3 log10 inactivation of MS2, UV254 nm required more than double the dose of UV220 nm (45 mJ/cm2 vs. 20 mJ/cm2). Linear correlations between the reduction in infectivity and the reduction in genome copies detected by reverse transcription quantitative polymerase chain reaction suggested that genomic damage is the main mechanism responsible for MS2 inactivation in water containing algal organic matter (AOM) by exposure to UV irradiation. These findings suggest that the presence of AOM did not negatively influence MS2 inactivation by either 220 or 254 nm irradiation, and that a lower UV dose of 220 nm irradiation can be used to achieve the same level of inactivation in water containing AOM.
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Affiliation(s)
- Yulin Wang
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Elbashir Araud
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801, United States
| | - Joanna L Shisler
- Institute of Genomic Biology, University of Illinois at Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL 61801, United States; Department of Microbiology, Institute of Genomic Biology, University of Illinois at Urbana-Champaign, 601 S. Goodwin, Urbana, IL 61801, United States
| | - Thanh H Nguyen
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801, United States; Institute of Genomic Biology, University of Illinois at Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL 61801, United States.
| | - Baoling Yuan
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China.
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18
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Zhang W, Fu J, Ehrhardt A. Novel Vector Construction Based on Alternative Adenovirus Types via Homologous Recombination. Hum Gene Ther Methods 2018; 29:124-134. [PMID: 29756505 DOI: 10.1089/hgtb.2018.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Adenoviral vector (AdV) is one of the most used vectors in gene therapy clinical trials. However the therapeutic effect of AdV is limited due to preexisting immunity to the currently used human adenovirus type 5 and pre-decided vector tropism. It is highly demanded to develop novel AdVs originated from other types than adenovirus type 5. Here, we describe a method for direct cloning of adenovirus utilizing linear-linear homologous recombination, followed by rapid adenoviral genome modification via linear-circular homologous recombination. A plasmid bearing chosen adenoviral genome with the desired modification is generated in three weeks, from which a novel AdV can be reconstituted.
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Affiliation(s)
- Wenli Zhang
- 1 Chair for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University , Witten, Germany
| | - Jun Fu
- 2 Shandong University-Helmholtz Joint Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University , Qingdao, China
| | - Anja Ehrhardt
- 1 Chair for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University , Witten, Germany
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19
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Xu J, Xu F, Lawson MS, Tkachenko OY, Ting AY, Kahl CA, Park BS, Stouffer RR, Bishop CV. Anti-Müllerian hormone is a survival factor and promotes the growth of rhesus macaque preantral follicles during matrix-free culture. Biol Reprod 2018; 98:197-207. [PMID: 29293939 PMCID: PMC6248587 DOI: 10.1093/biolre/iox181] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 12/22/2017] [Indexed: 11/14/2022] Open
Abstract
Anti-Müllerian hormone (AMH) plays a key role during ovarian follicular development, with local actions associated with a dynamic secretion profile by growing follicles. While results for AMH effects on antral follicle growth and function are consistent among studies in various species, any effects on preantral follicle development remain controversial. Therefore, experiments were conducted to investigate the direct actions and role of AMH during follicle development at the preantral stage. Macaque-specific short-hairpin RNAs (shRNAs) targeting AMH mRNA were incorporated into adenoviral vectors to decrease AMH gene expression in rhesus macaque follicles. Secondary follicles were isolated from adult macaque ovaries and cultured individually in the ultra-low-attachment dish containing defined medium supplemented with follicle-stimulating hormone and insulin for 5 weeks. Follicles were randomly assigned to treatment groups: (a) control, (b) nontargeting control shRNA-vector, (c) AMH shRNA-vector, (d) AMH shRNA-vector + recombinant human AMH, and (e) recombinant human AMH. Follicle survival and growth were assessed. Culture media were analyzed for steroid hormone and paracrine factor concentrations. For in vivo study, the nontargeting control shRNA-vector and AMH shRNA-vector were injected into macaque ovaries. Ovaries were collected 9 days postinjection for morphology and immunohistochemistry assessment. Decreased AMH expression reduced preantral follicle survival and growth in nonhuman primates. Supplemental AMH treatment in the culture media promoted preantral follicle growth to the small antral stage in vitro with increased steroid hormone and paracrine factor production, as well as oocyte maturation. These data demonstrate that AMH is a critical follicular paracrine/autocrine factor positively impacting preantral follicle survival and growth in primates.
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Affiliation(s)
- Jing Xu
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
- Division of Reproductive Endocrinology, Department of Obstetrics & Gynecology, School of Medicine, Oregon Health & Science University, Portland, Oregon, USA
| | - Fuhua Xu
- Division of Reproductive Endocrinology, Department of Obstetrics & Gynecology, School of Medicine, Oregon Health & Science University, Portland, Oregon, USA
| | - Maralee S Lawson
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Olena Y Tkachenko
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Alison Y Ting
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Christoph A Kahl
- Molecular Virology Support Core, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Byung S Park
- Oregon Health & Science University-Portland State University School of Public Health, Oregon Health & Science University, Portland, Oregon, USA
| | - Richard R Stouffer
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Cecily V Bishop
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
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20
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Mansouri M, Ehsaei Z, Taylor V, Berger P. Baculovirus-based genome editing in primary cells. Plasmid 2017; 90:5-9. [PMID: 28119062 DOI: 10.1016/j.plasmid.2017.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/19/2017] [Accepted: 01/19/2017] [Indexed: 12/27/2022]
Abstract
Genome editing in eukaryotes became easier in the last years with the development of nucleases that induce double strand breaks in DNA at user-defined sites. CRISPR/Cas9-based genome editing is currently one of the most powerful strategies. In the easiest case, a nuclease (e.g. Cas9) and a target defining guide RNA (gRNA) are transferred into a target cell. Non-homologous end joining (NHEJ) repair of the DNA break following Cas9 cleavage can lead to inactivation of the target gene. Specific repair or insertion of DNA with Homology Directed Repair (HDR) needs the simultaneous delivery of a repair template. Recombinant Lentivirus or Adenovirus genomes have enough capacity for a nuclease coding sequence and the gRNA but are usually too small to also carry large targeting constructs. We recently showed that a baculovirus-based multigene expression system (MultiPrime) can be used for genome editing in primary cells since it possesses the necessary capacity to carry the nuclease and gRNA expression constructs and the HDR targeting sequences. Here we present new Acceptor plasmids for MultiPrime that allow simplified cloning of baculoviruses for genome editing and we show their functionality in primary cells with limited life span and induced pluripotent stem cells (iPS).
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Affiliation(s)
- Maysam Mansouri
- Paul Scherrer Institute, Biomolecular Research, Molecular Cell Biology, CH-5232 Villigen, Switzerland; ETH Zürich, Department of Biology, CH-8093 Zürich, Switzerland
| | - Zahra Ehsaei
- University of Basel, Department of Biomedicine, CH-4058 Basel, Switzerland
| | - Verdon Taylor
- University of Basel, Department of Biomedicine, CH-4058 Basel, Switzerland
| | - Philipp Berger
- Paul Scherrer Institute, Biomolecular Research, Molecular Cell Biology, CH-5232 Villigen, Switzerland.
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21
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Adenoviral Vectors Armed with Cell Fusion-Inducing Proteins as Anti-Cancer Agents. Viruses 2017; 9:v9010013. [PMID: 28106842 PMCID: PMC5294982 DOI: 10.3390/v9010013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/13/2017] [Accepted: 01/15/2017] [Indexed: 01/26/2023] Open
Abstract
Cancer is a devastating disease that affects millions of patients every year, and causes an enormous economic burden on the health care system and emotional burden on affected families. The first line of defense against solid tumors is usually extraction of the tumor, when possible, by surgical methods. In cases where solid tumors can not be safely removed, chemotherapy is often the first line of treatment. As metastatic cancers often become vigorously resistant to treatments, the development of novel, more potent and selective anti-cancer strategies is of great importance. Adenovirus (Ad) is the most commonly used virus in cancer clinical trials, however, regardless of the nature of the Ad-based therapeutic, complete responses to treatment remain rare. A number of pre-clinical studies have shown that, for all vector systems, viral spread throughout the tumor mass can be a major limiting factor for complete tumor elimination. By expressing exogenous cell-fusion proteins, many groups have shown improved spread of Ad-based vectors. This review summarizes the research done to examine the potency of Ad vectors expressing fusogenic proteins as anti-cancer therapeutics.
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22
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Pelliccia M, Andreozzi P, Paulose J, D'Alicarnasso M, Cagno V, Donalisio M, Civra A, Broeckel RM, Haese N, Jacob Silva P, Carney RP, Marjomäki V, Streblow DN, Lembo D, Stellacci F, Vitelli V, Krol S. Additives for vaccine storage to improve thermal stability of adenoviruses from hours to months. Nat Commun 2016; 7:13520. [PMID: 27901019 PMCID: PMC5141364 DOI: 10.1038/ncomms13520] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 10/12/2016] [Indexed: 11/29/2022] Open
Abstract
Up to 80% of the cost of vaccination programmes is due to the cold chain problem (that is, keeping vaccines cold). Inexpensive, biocompatible additives to slow down the degradation of virus particles would address the problem. Here we propose and characterize additives that, already at very low concentrations, improve the storage time of adenovirus type 5. Anionic gold nanoparticles (10−8–10−6 M) or polyethylene glycol (PEG, molecular weight ∼8,000 Da, 10−7–10−4 M) increase the half-life of a green fluorescent protein expressing adenovirus from ∼48 h to 21 days at 37 °C (from 7 to >30 days at room temperature). They replicate the known stabilizing effect of sucrose, but at several orders of magnitude lower concentrations. PEG and sucrose maintained immunogenicity in vivo for viruses stored for 10 days at 37 °C. To achieve rational design of viral-vaccine stabilizers, our approach is aided by simplified quantitative models based on a single rate-limiting step. Keeping viral vaccines cold from the manufacturers to patients is problematic and costly. Here, Krol and others show additives that can significantly improve at very low concentrations the storage of adenovirus type 5 at ambient and elevated temperature.
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Affiliation(s)
- Maria Pelliccia
- European School of Molecular Medicine (SEMM), IFOM-IEO-Campus, via Adamello 16, Milan 20139, Italy.,Università degli Studi di Milano, Milan 20122, Italy.,Fondazione I.R.C.C.S. Istituto Neurologico Carlo Besta, IFOM-IEO-campus, via Adamello 16, Milan 20139, Italy
| | - Patrizia Andreozzi
- Fondazione I.R.C.C.S. Istituto Neurologico Carlo Besta, IFOM-IEO-campus, via Adamello 16, Milan 20139, Italy
| | - Jayson Paulose
- Instituut-Lorentz for theoretical physics, Leiden University, 271, Niels Bohrweg 2, NL 2333 CA Leiden, The Netherlands
| | - Marco D'Alicarnasso
- European School of Molecular Medicine (SEMM), IFOM-IEO-Campus, via Adamello 16, Milan 20139, Italy.,Università degli Studi di Milano, Milan 20122, Italy.,Fondazione CEN-European Centre for Nanomedicine, Piazza Leonardo da Vinci, 32, 20133 Milan, Italy
| | - Valeria Cagno
- Laboratory of Molecular Virology and Antiviral Research, Department of Clinical and Biological Sciences, University of Turin, S. Luigi Gonzaga Hospital, Regione Gonzole 10, 10043 Orbassano, Italy
| | - Manuela Donalisio
- Laboratory of Molecular Virology and Antiviral Research, Department of Clinical and Biological Sciences, University of Turin, S. Luigi Gonzaga Hospital, Regione Gonzole 10, 10043 Orbassano, Italy
| | - Andrea Civra
- Laboratory of Molecular Virology and Antiviral Research, Department of Clinical and Biological Sciences, University of Turin, S. Luigi Gonzaga Hospital, Regione Gonzole 10, 10043 Orbassano, Italy
| | - Rebecca M Broeckel
- Vaccine &Gene Therapy Institute, Oregon Health &Science University, 505 NW 185th Avenue, Beaverton, Oregon 97006, USA
| | - Nicole Haese
- Vaccine &Gene Therapy Institute, Oregon Health &Science University, 505 NW 185th Avenue, Beaverton, Oregon 97006, USA
| | - Paulo Jacob Silva
- Institute of Materials and Interfaculty Bioengineering Institute, École polytechnique fédérale de Lausanne, STI IMX SUNMIL MXG 030, Station 12, CH-1015 Lausanne, Switzerland
| | - Randy P Carney
- Institute of Materials and Interfaculty Bioengineering Institute, École polytechnique fédérale de Lausanne, STI IMX SUNMIL MXG 030, Station 12, CH-1015 Lausanne, Switzerland
| | - Varpu Marjomäki
- Department of Biological and Environmental Science/Nanoscience Center, University of Jyväskyla, Survontie 9, 40500 Jyväskyla, Finland
| | - Daniel N Streblow
- Vaccine &Gene Therapy Institute, Oregon Health &Science University, 505 NW 185th Avenue, Beaverton, Oregon 97006, USA
| | - David Lembo
- Laboratory of Molecular Virology and Antiviral Research, Department of Clinical and Biological Sciences, University of Turin, S. Luigi Gonzaga Hospital, Regione Gonzole 10, 10043 Orbassano, Italy
| | - Francesco Stellacci
- Institute of Materials and Interfaculty Bioengineering Institute, École polytechnique fédérale de Lausanne, STI IMX SUNMIL MXG 030, Station 12, CH-1015 Lausanne, Switzerland
| | - Vincenzo Vitelli
- Instituut-Lorentz for theoretical physics, Leiden University, 271, Niels Bohrweg 2, NL 2333 CA Leiden, The Netherlands
| | - Silke Krol
- Fondazione I.R.C.C.S. Istituto Neurologico Carlo Besta, IFOM-IEO-campus, via Adamello 16, Milan 20139, Italy.,Laboratory of Translational Nanotechnology, I.R.C.C.S. Istituto Tumori Giovanni Paolo II, viale Orazio, Flacco 65, Bari 70124, Italy
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23
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Shi H, Xagoraraki I, Parent KN, Bruening ML, Tarabara VV. Elution Is a Critical Step for Recovering Human Adenovirus 40 from Tap Water and Surface Water by Cross-Flow Ultrafiltration. Appl Environ Microbiol 2016; 82:4982-93. [PMID: 27287319 PMCID: PMC4968539 DOI: 10.1128/aem.00870-16] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 06/03/2016] [Indexed: 12/26/2022] Open
Abstract
UNLABELLED This paper examines the recovery of the enteric adenovirus human adenovirus 40 (HAdV 40) by cross-flow ultrafiltration and interprets recovery values in terms of physicochemical interactions of virions during sample concentration. Prior to ultrafiltration, membranes were either blocked by exposure to calf serum (CS) or coated with a polyelectrolyte multilayer (PEM). HAdV 40 is a hydrophobic virus with a point of zero charge between pH 4.0 and pH 4.3. In accordance with predictions from the extended Derjaguin-Landau-Verwey-Overbeek theory, the preelution recovery of HAdV (rpre) from deionized water was higher with PEM-coated membranes (rpre (PEM) = 74.8% ± 9.7%) than with CS-blocked membranes (rpre (CS) = 54.1% ± 6.2%). With either membrane type, the total virion recovery after elution (rpost) was high for both deionized water (rpost (PEM) = 99.5% ± 6.6% and rpost (CS) = 98.8% ± 7.7%) and tap water (rpost (PEM) = 89% ± 15% and rpost (CS) = 93.7% ± 6.9%). The nearly 100% recoveries suggest that the polyanion (sodium polyphosphate) and surfactant (Tween 80) in the eluent disrupt electrostatic and hydrophobic interactions between the virion and the membrane. Addition of EDTA to the eluent greatly improved the elution efficacy (rpost (CS) = 88.6% ± 4.3% and rpost (PEM) = 87.0% ± 6.9%) with surface water, even when the organic carbon concentration in the water was high (9.4 ± 0.1 mg/liter). EDTA likely disrupts cation bridging between virions and particles in the feed water matrix or the fouling layer on the membrane surface. For complex water matrices, the eluent composition is the most important factor for achieving high virion recovery. IMPORTANCE Herein we present the results of a comprehensive physicochemical characterization of HAdV 40, an important human pathogen. The data on HAdV 40 surface properties enabled rigorous modeling to gain an understanding of the energetics of virion-virion and virion-filter interactions. Cross-flow filtration for concentration and recovery of HAdV 40 was evaluated, with postelution recoveries from ultrapure water (99%), tap water (∼91%), and high-carbon-content surface water (∼84%) being demonstrated. These results are significant because of the very low adenovirus recoveries that have been reported, to date, for other methods. The recovery data were interpreted in terms of specific interactions, and the eluent composition was designed accordingly to maximize HAdV 40 recovery.
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Affiliation(s)
- Hang Shi
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, Michigan, USA
| | - Irene Xagoraraki
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, Michigan, USA
| | - Kristin N Parent
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, USA
| | - Merlin L Bruening
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | - Volodymyr V Tarabara
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, Michigan, USA
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24
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LeClair DA, Cranston ED, Xing Z, Thompson MR. Evaluation of excipients for enhanced thermal stabilization of a human type 5 adenoviral vector through spray drying. Int J Pharm 2016; 506:289-301. [PMID: 27130366 DOI: 10.1016/j.ijpharm.2016.04.067] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 04/10/2016] [Accepted: 04/25/2016] [Indexed: 02/07/2023]
Abstract
We have produced a thermally stable recombinant human type 5 adenoviral vector (AdHu5) through spray drying with three excipient formulations (l-leucine, lactose/trehalose and mannitol/dextran). Spray drying leads to immobilization of the viral vector which is believed to prevent viral protein unfolding, aggregation and inactivation. The spray dried powders were characterized by scanning electron microscopy, differential scanning calorimetry, Karl Fischer titrations, and X-ray diffraction to identify the effects of temperature and atmospheric moisture on the immobilizing matrix. Thermal stability of the viral vector was confirmed in vitro by infection of A549 lung epithelial cells. Mannitol/dextran powders showed the greatest improvement in thermal stability with almost no viral activity loss after storage at 20°C for 90days (0.7±0.3 log TCID50) which is a significant improvement over the current -80°C storage protocol. Furthermore, viral activity was retained over short term exposure (72h) to temperatures as high as 55°C. Conversely, all powders exhibited activity loss when subjected to moisture due to amplified molecular motion of the matrix. Overall, a straightforward method ideal for the production of thermally stable vaccines has been demonstrated through spray drying AdHu5 with a blend of mannitol and dextran and storing the powder under low humidity conditions.
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Affiliation(s)
- Daniel A LeClair
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Emily D Cranston
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Zhou Xing
- McMaster Immunology Research Centre & Department of Pathology and Molecular Medicine, McMaster University, Canada
| | - Michael R Thompson
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada.
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25
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Hao J, Cheng KCK, Kruger LG, Larsson L, Sugai JV, Lahann J, Giannobile WV. Multigrowth Factor Delivery via Immobilization of Gene Therapy Vectors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:3145-3151. [PMID: 26919685 PMCID: PMC5687504 DOI: 10.1002/adma.201600027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Indexed: 05/29/2023]
Abstract
Molecules can be immobilized onto biomaterials by a chemical vapor deposition (CVD) coating strategy. Pentafluorophenolester groups react with amine side chains on antibodies, which can selectively immobilize adenoviral vectors for gene delivery of growth factors. These vectors can produce functional proteins within defined regions of biomaterials to produce customizable structures for targeted tissue regeneration.
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Affiliation(s)
- Jie Hao
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
| | - Kenneth C K Cheng
- Biointerfaces Institute, Department of Materials Science and Engineering, B26-115S NCRC, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI, 48109-2800, USA
| | - Laura G Kruger
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
| | - Lena Larsson
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
- Department of Periodontology, Institute of Odontology, Medicinaregatan 12F, 6th Floor, University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - James V Sugai
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
| | - Joerg Lahann
- Biointerfaces Institute, Department of Chemical Engineering, Materials Science and Engineering, Biomedical Engineering, Macromolecular Science and Engineering, B10-A175 NCRC, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI, 48109-2800, USA
| | - William V Giannobile
- Department of Periodontics and Oral Medicine and Department of Biomedical Engineering, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
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26
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Silva HD, Pessoa-de-Souza MA, Fongaro G, Anunciação CE, Silveira-Lacerda EDP, Barardi CRM, Garcia-Zapata MTA. Behaviour and recovery of human adenovirus from tropical sediment under simulated conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 530-531:314-322. [PMID: 26047866 DOI: 10.1016/j.scitotenv.2015.05.075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 05/12/2015] [Accepted: 05/18/2015] [Indexed: 06/04/2023]
Abstract
This study assessed the contributions of pH and organic matter (OM) on the recovery of infectious human adenovirus 5 (HAdV-5) and genome copies (GCs) in waters that were artificially contaminated with tropical soil. The use of a mathematical equation was proposed based on the flocculation index of clay to assess the recovery of total GCs in these controlled assays. The results suggest that solids in the water reduced the viral genome copy loads per millilitre (GC · mL(-1)) and viral infectivity. OM did not influence the GC · mL(-1) recovery rate (p > 0.05) but led to a 99% (2 log10) reduction in plaque-forming unit counts per millilitre (PFU/mL), which indicates that infectivity and gene integrity were non-related parameters. Our findings also suggest that acidic pH levels hinder viral inactivation and that clay is the main factor responsible for the interactions of HAdV-5 with soil. These findings may be useful for future eco-epidemiological investigations and studies of viral inactivation or even as parameters for future research into water quality analysis and water treatment.
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Affiliation(s)
- Hugo Delleon Silva
- Núcleo de Pesquisas em Agente Emergentes e Re-emegentes, Instituto de Patologia e Saúde Pública, Universidade Federal de Goiás, Brazil; Instituto Brasil de Ciência e Tecnologia, Anápolis, Brazil
| | | | - Gislaine Fongaro
- Laboratório de Virologia Aplicada, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Brazil
| | - Carlos E Anunciação
- Laboratório de Diagnóstico Genético e Molecular, Departamento de Bioquímica e Biologia Molecular, Instituto de Ciências Biológicas II, Universidade Federal de Goiás, Brazil
| | - Elisângela de P Silveira-Lacerda
- Laboratório de Genética Molecular e Citogenética, Departamento de Biologia Geral, Instituto de Ciências Biológicas I, Universidade Federal de Goiás, Brazil
| | - Célia Regina Monte Barardi
- Laboratório de Virologia Aplicada, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Brazil
| | - Marco Tulio Antonio Garcia-Zapata
- Núcleo de Pesquisas em Agente Emergentes e Re-emegentes, Instituto de Patologia e Saúde Pública, Universidade Federal de Goiás, Brazil.
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27
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The adenovirus genome contributes to the structural stability of the virion. Viruses 2014; 6:3563-83. [PMID: 25254384 PMCID: PMC4189039 DOI: 10.3390/v6093563] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 09/15/2014] [Accepted: 09/17/2014] [Indexed: 11/17/2022] Open
Abstract
Adenovirus (Ad) vectors are currently the most commonly used platform for therapeutic gene delivery in human gene therapy clinical trials. Although these vectors are effective, many researchers seek to further improve the safety and efficacy of Ad-based vectors through detailed characterization of basic Ad biology relevant to its function as a vector system. Most Ad vectors are deleted of key, or all, viral protein coding sequences, which functions to not only prevent virus replication but also increase the cloning capacity of the vector for foreign DNA. However, radical modifications to the genome size significantly decreases virion stability, suggesting that the virus genome plays a role in maintaining the physical stability of the Ad virion. Indeed, a similar relationship between genome size and virion stability has been noted for many viruses. This review discusses the impact of the genome size on Ad virion stability and emphasizes the need to consider this aspect of virus biology in Ad-based vector design.
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28
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Lesniewski A, Los M, Jonsson-Niedziółka M, Krajewska A, Szot K, Los JM, Niedziolka-Jonsson J. Antibody Modified Gold Nanoparticles for Fast and Selective, Colorimetric T7 Bacteriophage Detection. Bioconjug Chem 2014; 25:644-8. [DOI: 10.1021/bc500035y] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adam Lesniewski
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Marcin Los
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
- Department
of Molecular Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Martin Jonsson-Niedziółka
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Anna Krajewska
- Department
of Molecular Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Katarzyna Szot
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
- Department
of Molecular Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Joanna M. Los
- Department
of Molecular Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Joanna Niedziolka-Jonsson
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
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29
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Park S, Park HH, Kim SY, Kim SJ, Woo K, Ko G. Antiviral properties of silver nanoparticles on a magnetic hybrid colloid. Appl Environ Microbiol 2014; 80:2343-50. [PMID: 24487537 PMCID: PMC3993170 DOI: 10.1128/aem.03427-13] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Accepted: 01/27/2014] [Indexed: 11/20/2022] Open
Abstract
Silver nanoparticles (AgNPs) are considered to be a potentially useful tool for controlling various pathogens. However, there are concerns about the release of AgNPs into environmental media, as they may generate adverse human health and ecological effects. In this study, we developed and evaluated a novel micrometer-sized magnetic hybrid colloid (MHC) decorated with variously sized AgNPs (AgNP-MHCs). After being applied for disinfection, these particles can be easily recovered from environmental media using their magnetic properties and remain effective for inactivating viral pathogens. We evaluated the efficacy of AgNP-MHCs for inactivating bacteriophage ΦX174, murine norovirus (MNV), and adenovirus serotype 2 (AdV2). These target viruses were exposed to AgNP-MHCs for 1, 3, and 6 h at 25°C and then analyzed by plaque assay and real-time TaqMan PCR. The AgNP-MHCs were exposed to a wide range of pH levels and to tap and surface water to assess their antiviral effects under different environmental conditions. Among the three types of AgNP-MHCs tested, Ag30-MHCs displayed the highest efficacy for inactivating the viruses. The ΦX174 and MNV were reduced by more than 2 log10 after exposure to 4.6 × 10(9) Ag30-MHCs/ml for 1 h. These results indicated that the AgNP-MHCs could be used to inactivate viral pathogens with minimum chance of potential release into environment.
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Affiliation(s)
- SungJun Park
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Hye Hun Park
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Sung Yeon Kim
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Su Jung Kim
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Kyoungja Woo
- Molecular Recognition Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - GwangPyo Ko
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
- Bio-MAX Institute, Seoul National University, Seoul, Republic of Korea
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30
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Abstract
High-capacity adenoviral vectors (HC-Ad), also known as "helper-dependent" (HD-Ad), "gutless", "gutted", or "third-generation" Ad vectors, are devoid of all viral coding sequences and have shown promising potential for a wide variety of different applications-from classic gene therapy to genetic vaccination and tumor treatment. However, compared to first-generation adenoviral vectors their production is more complex and requires specific in-depth knowledge. This chapter delivers a detailed protocol for the successful production of HC-Ad vectors to high titers.
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31
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Ke Y, Lei M, Wang X, Solaro RJ. Unique catalytic activities and scaffolding of p21 activated kinase-1 in cardiovascular signaling. Front Pharmacol 2013; 4:116. [PMID: 24098283 PMCID: PMC3784770 DOI: 10.3389/fphar.2013.00116] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 08/28/2013] [Indexed: 01/16/2023] Open
Abstract
P21 activated kinase-1 (Pak1) has diverse functions in mammalian cells. Although a large number of phosphoproteins have been designated as Pak1 substrates from in vitro studies, emerging evidence has indicated that Pak1 may function as a signaling molecule through a unique molecular mechanism – scaffolding. By scaffolding, Pak1 delivers signals through an auto-phosphorylation-induced conformational change without transfer of a phosphate group to its immediate downstream effector(s). Here we review evidence for this regulatory mechanism based on structural and functional studies of Pak1 in different cell types and research models as well as in vitro biochemical assays. We also discuss the implications of Pak1 scaffolding in disease-related signaling processes and the potential in cardiovascular drug development.
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Affiliation(s)
- Yunbo Ke
- Department of Physiology and Biophysics, University of Illinois at Chicago Chicago, IL, USA ; Center for Cardiovascular Research, College of Medicine, University of Illinois at Chicago Chicago, IL, USA
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32
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Wong CM, McFall ER, Burns JK, Parks RJ. The role of chromatin in adenoviral vector function. Viruses 2013; 5:1500-15. [PMID: 23771241 PMCID: PMC3717718 DOI: 10.3390/v5061500] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 06/01/2013] [Accepted: 06/04/2013] [Indexed: 12/20/2022] Open
Abstract
Vectors based on adenovirus (Ad) are one of the most commonly utilized platforms for gene delivery to cells in molecular biology studies and in gene therapy applications. Ad is also the most popular vector system in human clinical gene therapy trials, largely due to its advantageous characteristics such as high cloning capacity (up to 36 kb), ability to infect a wide variety of cell types and tissues, and relative safety due to it remaining episomal in transduced cells. The latest generation of Ad vectors, helper‑dependent Ad (hdAd), which are devoid of all viral protein coding sequences, can mediate high-level expression of a transgene for years in a variety of species ranging from rodents to non-human primates. Given the importance of histones and chromatin in modulating gene expression within the host cell, it is not surprising that Ad, a nuclear virus, also utilizes these proteins to protect the genome and modulate virus- or vector‑encoded genes. In this review, we will discuss our current understanding of the contribution of chromatin to Ad vector function.
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Affiliation(s)
- Carmen M. Wong
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, K1H 8L6, Canada; E-Mails: (C.M.W.); (E.R.M.); (J.K.B.)
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Emily R. McFall
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, K1H 8L6, Canada; E-Mails: (C.M.W.); (E.R.M.); (J.K.B.)
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Joseph K. Burns
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, K1H 8L6, Canada; E-Mails: (C.M.W.); (E.R.M.); (J.K.B.)
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Robin J. Parks
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, K1H 8L6, Canada; E-Mails: (C.M.W.); (E.R.M.); (J.K.B.)
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
- Department of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-613-737-8123; Fax: +1-613-737-8803
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33
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Brandon Ogbunugafor C, Alto BW, Overton TM, Bhushan A, Morales NM, Turner PE. Evolution of increased survival in RNA viruses specialized on cancer-derived cells. Am Nat 2013; 181:585-95. [PMID: 23594543 DOI: 10.1086/670052] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Viruses and other pathogens can diverge in their evolved host-use strategies because of exposure to different host types and conflicts between within-host reproduction and between-host survival. Most host-pathogen studies have emphasized the role of intrahost reproduction in the evolution of pathogen virulence, whereas the role of extra-host survival has received less attention. Here, we examine the evolution of free-living virion survival in RNA virus populations differing in their histories of host use. To do so, we used lineages of vesicular stomatitis virus (VSV) that were experimentally evolved in laboratory tissue culture for 100 generations on cancer-derived cells, noncancerous cells, or alternating passages of the two host types. We observed that free-living survival improved when VSV populations specialized on human epithelial carcinoma (HeLa) cells, whereas this trait was not associated with selection on noncancer cells or combinations of the cell types. We attributed this finding to shorter-lived HeLa monolayers and/or rapid cell-to-cell spread of viruses on HeLa cells in tissue culture, both of which could select for enhanced virus stability between host-cell replenishment. We also showed evidence that increases in virion survival were associated with decreases in virulence, which suggests a trade-off between survival and virulence for the VSV populations on one cell type. Our results shed new light on the causes and consequences of "sit and wait" infection strategies in RNA viruses.
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Affiliation(s)
- C Brandon Ogbunugafor
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut 06520, USA.
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34
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Wang Z, Kim JI, Frilot N, Daaka Y. Dynamin2 S-nitrosylation regulates adenovirus type 5 infection of epithelial cells. J Gen Virol 2012; 93:2109-2117. [PMID: 22791607 DOI: 10.1099/vir.0.042713-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Dynamin2 is a large GTPase that regulates vesicle trafficking, and the GTPase activity of dynamin2 is required for the multistep process of adenovirus infection. Activity of dynamin2 may be regulated by post-translational phosphorylation and S-nitrosylation modifications. In this study, we demonstrate a role for dynamin2 S-nitrosylation in adenovirus infection of epithelial cells. We show that adenovirus serotype 5 (Ad5) infection augments production of nitric oxide (NO) in epithelial cells and causes the S-nitrosylation of dynamin2, mainly on cysteine 86 (C86) and 607 (C607) residues. Forced overexpression of dynamin2 bearing C86A and/or C607A mutations decreases Ad5 infection. Diminishing NO synthesis by RNAi-induced knockdown of endogenous endothelial NO synthase (eNOS) expression attenuates virus infection of target cells. Ad5 infection promotes the kinetically dynamic S-nitrosylation of dynamin2 and eNOS: there is a rapid decrease in eNOS S-nitrosylation and a concomitant increase in the dynamin2 S-nitrosylation. These results support the hypothesis that dynamin2 S-nitrosylation following eNOS activation facilitates adenovirus infection of host epithelial cells.
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Affiliation(s)
- Zhimin Wang
- Department of Urology and Prostate Disease Center, University of Florida, Gainesville, FL 32610, USA
| | - Jae Il Kim
- Department of Urology and Prostate Disease Center, University of Florida, Gainesville, FL 32610, USA
| | - Nicole Frilot
- Department of Pathology, Georgia Health Sciences University, Augusta, GA 30912, USA
| | - Yehia Daaka
- Department of Anatomy and Cell Biology, University of Florida, Gainesville, FL 32610, USA.,Department of Urology and Prostate Disease Center, University of Florida, Gainesville, FL 32610, USA
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35
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Armendáriz-Borunda J, Bastidas-Ramírez BE, Sandoval-Rodríguez A, González-Cuevas J, Gómez-Meda B, García-Bañuelos J. Production of first generation adenoviral vectors for preclinical protocols: amplification, purification and functional titration. J Biosci Bioeng 2012; 112:415-21. [PMID: 21856222 DOI: 10.1016/j.jbiosc.2011.07.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 07/04/2011] [Accepted: 07/20/2011] [Indexed: 01/08/2023]
Abstract
Gene therapy represents a promising approach in the treatment of several diseases. Currently, the ideal vector has yet to be designed; though, adenoviral vectors (Ad-v) have provided the most utilized tool for gene transfer due principally to their simple production, among other specific characteristics. Ad-v viability represents a critical variable that may be affected by storage or shipping conditions and therefore it is advisable to be assessed previously to protocol performance. The present work is unique in this matter, as the complete detailed process to obtain Ad-v of preclinical grade is explained. Amplification in permissive HEK-293 cells, purification in CsCl gradients in a period of 10 h, spectrophotometric titration of viral particles (VP) and titration of infectious units (IU), yielding batches of AdβGal, AdGFP, AdHuPA and AdMMP8, of approximately 10¹³-10¹⁴ VP and 10¹²-10¹³ IU were carried out. In vivo functionality of therapeutic AdHuPA and AdMMP8 was evidenced in rats presenting CCl₄-induced fibrosis, as more than 60% of fibrosis was eliminated in livers after systemic delivery through iliac vein in comparison with irrelevant AdβGal. Time required to accomplish the whole Ad-v production steps, including IU titration was 20 to 30 days. We conclude that production of Ad-v following standard operating procedures assuring vector functionality and the possibility to effectively evaluate experimental gene therapy results, leaving aside the use of high-cost commercial kits or sophisticated instrumentation, can be performed in a conventional laboratory of cell culture.
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Affiliation(s)
- Juan Armendáriz-Borunda
- Instituto de Biología Molecular en Medicina y Terapia Génica, Departamento de Biologìa Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Sierra Mojada 950, Guadalajara, Jalisco 44340, Mexico
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Giberson AN, Davidson AR, Parks RJ. Chromatin structure of adenovirus DNA throughout infection. Nucleic Acids Res 2011; 40:2369-76. [PMID: 22116065 PMCID: PMC3315334 DOI: 10.1093/nar/gkr1076] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
For more than half a century, researchers have studied the basic biology of Adenovirus (Ad), unraveling the subtle, yet profound, interactions between the virus and the host. These studies have uncovered previously unknown proteins and pathways crucial for normal cell function that the virus manipulates to achieve optimal virus replication and gene expression. In the infecting virion, the viral DNA is tightly condensed in a virally encoded protamine-like protein which must be remodeled within the first few hours of infection to allow for efficient expression of virus-encoded genes and subsequent viral DNA replication. This review discusses our current knowledge of Ad DNA–protein complex within the infected cell nucleus, the cellular proteins the virus utilizes to achieve chromatinization, and how this event contributes to efficient gene expression and progression of the virus life cycle.
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Affiliation(s)
- Andrea N Giberson
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Department of Biochemistry, Microbiology and Immunology and Centre for Neuromuscular Disease, University of Ottawa, Ottawa, ON, Canada
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Targeted cancer immunotherapy with oncolytic adenovirus coding for a fully human monoclonal antibody specific for CTLA-4. Gene Ther 2011; 19:988-98. [PMID: 22071969 DOI: 10.1038/gt.2011.176] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Promising clinical results have been achieved with monoclonal antibodies (mAbs) such as ipilimumab and tremelimumab that block cytotoxic T lymphocyte-associated antigen-4 (CTLA-4, CD152). However, systemic administration of these agents also has the potential for severe immune-related adverse events. Thus, local production might allow higher concentrations at the target while reducing systemic side effects. We generated a transductionally and transcriptionally targeted oncolytic adenovirus Ad5/3-Δ24aCTLA4 expressing complete human mAb specific for CTLA-4 and tested it in vitro, in vivo and in peripheral blood mononuclear cells (PBMCs) of normal donors and patients with advanced solid tumors. mAb expression was confirmed by western blotting and immunohistochemistry. Biological functionality was determined in a T-cell line and in PBMCs from cancer patients. T cells of patients, but not those of healthy donors, were activated by an anti-CTLA4mAb produced by Ad5/3-Δ24aCTLA4. In addition to immunological effects, a direct anti-CTLA-4-mediated pro-apoptotic effect was observed in vitro and in vivo. Local production resulted in 43-fold higher (P<0.05) tumor versus plasma anti-CTLA4mAb concentration. Plasma levels in mice remained below what has been reported safe in humans. Replication-competent Ad5/3-Δ24aCTLA4 resulted in 81-fold higher (P<0.05) tumor mAb levels as compared with a replication-deficient control. This is the first report of an oncolytic adenovirus producing a full-length human mAb. High mAb concentrations were seen at tumors with lower systemic levels. Stimulation of T cells of cancer patients by Ad5/3-Δ24aCTLA4 suggests feasibility of testing the approach in clinical trials.
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Vetrini F, Ng P. Gene therapy with helper-dependent adenoviral vectors: current advances and future perspectives. Viruses 2010; 2:1886-1917. [PMID: 21994713 PMCID: PMC3186006 DOI: 10.3390/v2091886] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 08/26/2010] [Accepted: 08/30/2010] [Indexed: 11/21/2022] Open
Abstract
Recombinant Adenoviral vectors represent one of the best gene transfer platforms due to their ability to efficiently transduce a wide range of quiescent and proliferating cell types from various tissues and species. The activation of an adaptive immune response against the transduced cells is one of the major drawbacks of first generation Adenovirus vectors and has been overcome by the latest generation of recombinant Adenovirus, the Helper-Dependent Adenoviral (HDAd) vectors. HDAds have innovative features including the complete absence of viral coding sequences and the ability to mediate high level transgene expression with negligible chronic toxicity. This review summarizes the many aspects of HDAd biology and structure with a major focus on in vivo gene therapy application and with an emphasis on the unsolved issues that these vectors still presents toward clinical application.
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Affiliation(s)
| | - Philip Ng
- Author to whom correspondence should be addressed; Tel.: +1 7137984158; E-Mail:
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Assessment of the Na/I symporter as a reporter gene to visualize oncolytic adenovirus propagation in peritoneal tumours. Eur J Nucl Med Mol Imaging 2010; 37:1377-85. [PMID: 20140612 DOI: 10.1007/s00259-009-1379-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Accepted: 12/24/2009] [Indexed: 12/13/2022]
Abstract
PURPOSE In vivo imaging of the spread of oncolytic viruses using the Na/I symporter (NIS) has been proposed. Here, we assessed whether the presence of NIS in the viral genome affects the therapeutic efficacy of the oncolytic adenovirus dl922-947 following intraperitoneal administration, in a mouse model of peritoneal ovarian carcinoma. METHODS We generated AdAM7, a dl922-947 oncolytic adenovirus encoding the NIS coding sequence. Iodide uptake, NIS expression, infectivity and cell-killing activity of AdAM7, as well as that of relevant controls, were determined in vitro. In vivo, the propagation of this virus in the peritoneal cavity of tumour-bearing mice was determined using SPECT/CT imaging and its therapeutic efficacy was evaluated. RESULTS In vitro infection of ovarian carcinoma IGROV-1 cells with ADAM7 led to functional expression of NIS. However, the insertion of NIS into the viral genome resulted in a loss of efficacy of the virus in terms of replication and cytotoxicity. In vivo, on SPECT/CT imaging AdAM7 was only detectable in the peritoneal cavity of animals bearing peritoneal ovarian tumours for up to 5 days after intraperitoneal administration. Therapeutic experiments in vivo demonstrated that AdAM7 is as potent as its NIS-negative counterpart. CONCLUSION This study demonstrated that despite the detrimental effect observed in vitro, insertion of the reporter gene NIS in an oncolytic adenovirus did not affect its therapeutic efficacy in vivo. We conclude that NIS is a highly relevant reporter gene to monitor the fate of oncolytic adenovectors in live subjects.
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