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Lana MVG, Antunes F, Tessarollo NG, Strauss BE. Stable expression of shRNA for the control of recombinant adenovirus replication. Braz J Med Biol Res 2023; 56:e12682. [PMID: 37493770 PMCID: PMC10361640 DOI: 10.1590/1414-431x2023e12682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/24/2023] [Indexed: 07/27/2023] Open
Abstract
Preventing the replication of adenovirus could have practical uses, such as controlling infection with wild-type virus or in applications involving recombinant vectors. Mainly transient methods have been used to inhibit adenovirus replication, including siRNA or drugs. Here, we tested whether stable expression of shRNA designed to target hexon, Iva2, or pol can inhibit the replication of a recombinant adenoviral vector, Ad-LacZ (serotype 5, E1/E3 deleted), in 293T cells. Significant knockdown correlating with reduced Ad-LacZ replication was achieved only when hexon was targeted. Cell sorting and isolation of cellular clones further accentuated knockdown of the hexon transcript, reduced protein levels by more than 90%, and diminished adenovirus production. As visualized by transmission electron microscopy, the cellular clone expressing the hexon-specific shRNA yielded 89.2% fewer particles compared to the parental 293T cells. Full scale production followed by purification revealed a 90.2% reduction in Ad-LacZ biological titer. These results support the notion that stable expression of shRNA can be used as a means to control adenovirus replication.
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Affiliation(s)
- M V G Lana
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia/CTO/LIM24, Instituto do Câncer do Estado de São Paulo, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - F Antunes
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia/CTO/LIM24, Instituto do Câncer do Estado de São Paulo, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - N G Tessarollo
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia/CTO/LIM24, Instituto do Câncer do Estado de São Paulo, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
- Laboratório de Bioinformática e Biologia Computacional, Instituto Nacional do Câncer, Ministério da Saúde, Rio de Janeiro, RJ, Brasil
| | - B E Strauss
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia/CTO/LIM24, Instituto do Câncer do Estado de São Paulo, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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2
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Geisler A, Dieringer B, Elsner L, Klingel K, Klopfleisch R, Vornlocher HP, Kurreck J, Fechner H. Lipid nanoparticle-encapsulated, chemically modified anti-adenoviral siRNAs inhibit hepatic adenovirus infection in immunosuppressed Syrian hamsters. MOLECULAR THERAPY. NUCLEIC ACIDS 2023; 32:923-936. [PMID: 37346978 PMCID: PMC10280093 DOI: 10.1016/j.omtn.2023.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 05/10/2023] [Indexed: 06/23/2023]
Abstract
RNA interference has demonstrated its potential as an antiviral therapy for treatment of human adenovirus (hAd) infections. The only existing viral vector-based system for delivery of anti-adenoviral artificial microRNAs available for in vivo use, however, has proven to be inefficient in therapeutic applications. In this study, we investigated the potential of stabilized small interfering RNA (siRNA) encapsulated in lipid nanoparticles (LNPs) for treatment of hepatic hAd serotype 5 (hAd5) infection in an hAd infection model using immunosuppressed Syrian hamsters. The siRNA sipTPmod directed against the adenoviral pre-terminal protein (pTP) and containing 2'-O-methyl modifications as well as phosphorothioate linkages effectively inhibited hAd5 infection in vitro. In light of this success, sipTPmod was encapsulated in LNPs containing the cationic lipid XL-10, which enables hepatocyte-specific siRNA transfer, and injected intravenously into hAd5-infected immunosuppressed Syrian hamsters. This resulted in a significant reduction of liver hAd5 titers, a trend toward reduced liver injury and inflammation, and reduction of viral titers in the blood and spleen compared with hAd5-infected animals that received a non-silencing siRNA. These effects were demonstrated in animals infected with low and moderate doses of hAd5. These data demonstrate that hepatic hAd5 infection can be successfully treated with anti-adenoviral sipTPmod encapsulated in LNPs.
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Affiliation(s)
- Anja Geisler
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Babette Dieringer
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Leslie Elsner
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Karin Klingel
- Cardiopathology, Institute for Pathology and Neuropathology, University Hospital Tübingen, Tübingen, Germany
| | - Robert Klopfleisch
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertag-Straße 15, 14163 Berlin, Germany
| | | | - Jens Kurreck
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Henry Fechner
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
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3
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Wold WSM, Tollefson AE, Ying B, Spencer JF, Toth K. Drug development against human adenoviruses and its advancement by Syrian hamster models. FEMS Microbiol Rev 2019; 43:380-388. [PMID: 30916746 DOI: 10.1093/femsre/fuz008] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/25/2019] [Indexed: 02/02/2023] Open
Abstract
The symptoms of human adenovirus infections are generally mild and self-limiting. However, these infections have been gaining importance in recent years because of a growing number of immunocompromised patients. Solid organ and hematopoietic stem cell transplant patients are subjected to severe immunosuppressive regimes and cannot efficaciously eliminate virus infections. In these patients, adenovirus infections can develop into deadly multi-organ disseminated disease. Presently, in the absence of approved therapies, physicians rely on drugs developed for other purposes to treat adenovirus infections. As there is a need for anti-adenoviral therapies, researchers have been developing new agents and repurposing existing ones to treat adenovirus infections. There are several small molecule drugs that are being tested for their efficacy against human adenoviruses; some of these have reached clinical trials, while others are still in the preclinical phase. Besides these compounds, research on immunotherapy against adenoviral infection has made significant progress, promising another modality for treatment. The availability of an animal model confirmed the activity of some drugs already in clinical use while proving that others are inactive. This led to the identification of several lead compounds that await further development. In the present article, we review the current status of anti-adenoviral therapies and their advancement by in vivo studies in the Syrian hamster model.
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Affiliation(s)
- William S M Wold
- Saint Louis University School of Medicine, Department of Molecular Microbiology and Immunology, 1100 S. Grand Boulevard, St. Louis, MO, USA
| | - Ann E Tollefson
- Saint Louis University School of Medicine, Department of Molecular Microbiology and Immunology, 1100 S. Grand Boulevard, St. Louis, MO, USA
| | - Baoling Ying
- Saint Louis University School of Medicine, Department of Molecular Microbiology and Immunology, 1100 S. Grand Boulevard, St. Louis, MO, USA
| | - Jacqueline F Spencer
- Saint Louis University School of Medicine, Department of Molecular Microbiology and Immunology, 1100 S. Grand Boulevard, St. Louis, MO, USA
| | - Karoly Toth
- Saint Louis University School of Medicine, Department of Molecular Microbiology and Immunology, 1100 S. Grand Boulevard, St. Louis, MO, USA
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Abstract
Human adenovirus (HAdV) is a ubiquitous virus that infects the mucosa of the eye. It is the most common cause of infectious conjunctivitis worldwide, affecting people of all ages and demographics. Pharyngoconjunctival fever outbreak is due to HAdV types 3, 4, and 7, whereas outbreaks of epidemic keratoconjunctivitis are usually caused by HAdV types 8, 19, 37, and 54. Primary cellular receptors, such as CAR, CD46, and sialic acid interact with fiber-knob protein to mediate adenoviral attachment to the host cell, whereas adenoviral penton base–integrin interaction mediates internalization of adenovirus. Type 1 immunoresponse to adenoviral ocular infection involves both innate immunity mediated by natural killer cells and type 1 interferon, as well as adaptive immunity mediated mainly by CD8 T cells. The resulting ocular manifestations are widely variable, with pharyngoconjunctival fever being the most common, manifesting clinically with fever, pharyngitis, and follicular conjunctivitis. Epidemic keratoconjunctivitis, however, is the severest form, with additional involvement of the cornea leading to development of subepithelial infiltrates. Because there is currently no US Food and Drug Administration-approved treatment for adenoviral ocular infection, current management is palliative. The presence of sight-threatening complications following ocular adenoviral infection warrants the necessity for developing antiadenoviral therapy with enhanced therapeutic index. Future trends that focus on adenoviral pathogenesis, including adenoviral protein, which utilize host receptors to promote infection, could be potential therapeutic targets, yielding shorter active disease duration and reduced disease burden.
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Affiliation(s)
- DeGaulle I Chigbu
- Pennsylvania College of Optometry, Salus University, Elkins Park, PA, USA,
| | - Bisant A Labib
- Pennsylvania College of Optometry, Salus University, Elkins Park, PA, USA,
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Toth K, Spencer JF, Ying B, Tollefson AE, Hartline CB, Richard ET, Fan J, Lyu J, Kashemirov BA, Harteg C, Reyna D, Lipka E, Prichard MN, McKenna CE, Wold WSM. USC-087 protects Syrian hamsters against lethal challenge with human species C adenoviruses. Antiviral Res 2018; 153:1-9. [PMID: 29510156 PMCID: PMC5891362 DOI: 10.1016/j.antiviral.2018.03.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/28/2018] [Accepted: 03/02/2018] [Indexed: 02/08/2023]
Abstract
Human adenoviruses (AdV) cause generally mild infections of the respiratory and GI tracts as well as some other tissues. However, AdV can cause serious infection in severely immunosuppressed individuals, especially pediatric patients undergoing allogeneic hematopoietic stem cell transplantation, where mortality rates are up to 80% with disseminated disease. Despite the seriousness of AdV disease, there are no drugs approved specifically to treat AdV infections. We report here that USC-087, an N-alkyl tyrosinamide phosphonate ester prodrug of HPMPA, the adenine analog of cidofovir, is highly effective against multiple AdV types in cell culture. USC-087 is also effective against AdV-C6 in our immunosuppressed permissive Syrian hamster model. In this model, hamsters are immunosuppressed by treatment with high dose cyclophosphamide. Injection of AdV-C6 (or AdV-C5) intravenously leads to a disseminated infection that resembles the disease seen in humans, including death. We have tested the efficacy of orally-administered USC-087 against the median lethal dose of intravenously administered AdV-C6. USC-087 completely prevented or significantly decreased mortality when administered up to 4 days post challenge. USC-087 also prevented or significantly decreased liver damage caused by AdV-C6 infection, and suppressed virus replication even when administered 4 days post challenge. These results imply that USC-087 is a promising candidate for drug development against HAdV infections.
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Affiliation(s)
- Karoly Toth
- Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | | | - Baoling Ying
- Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Ann E Tollefson
- Saint Louis University School of Medicine, St. Louis, MO 63104, USA
| | | | - Eric T Richard
- University of Southern California, Los Angeles, CA 90089, USA
| | - Jiajun Fan
- University of Southern California, Los Angeles, CA 90089, USA
| | - Jinglei Lyu
- University of Southern California, Los Angeles, CA 90089, USA
| | | | - Cheryl Harteg
- Therapeutic Systems Research Laboratories, Inc, Ann Arbor, MI 48108, USA
| | - Dawn Reyna
- Therapeutic Systems Research Laboratories, Inc, Ann Arbor, MI 48108, USA
| | - Elke Lipka
- Therapeutic Systems Research Laboratories, Inc, Ann Arbor, MI 48108, USA
| | - Mark N Prichard
- University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | | | - William S M Wold
- Saint Louis University School of Medicine, St. Louis, MO 63104, USA.
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Intracellular trafficking and therapeutic outcome of multiwalled carbon nanotubes modified with cyclodextrins and polyethylenimine. Colloids Surf B Biointerfaces 2018; 163:55-63. [DOI: 10.1016/j.colsurfb.2017.12.028] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/23/2017] [Accepted: 12/14/2017] [Indexed: 12/18/2022]
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Approach to adenovirus infections in the setting of hematopoietic cell transplantation. Curr Opin Infect Dis 2017; 30:377-387. [DOI: 10.1097/qco.0000000000000379] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Anti-adenoviral Artificial MicroRNAs Expressed from AAV9 Vectors Inhibit Human Adenovirus Infection in Immunosuppressed Syrian Hamsters. MOLECULAR THERAPY. NUCLEIC ACIDS 2017; 8:300-316. [PMID: 28918031 PMCID: PMC5537171 DOI: 10.1016/j.omtn.2017.07.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 07/03/2017] [Accepted: 07/03/2017] [Indexed: 12/27/2022]
Abstract
Infections of immunocompromised patients with human adenoviruses (hAd) can develop into life-threatening conditions, whereas drugs with anti-adenoviral efficiency are not clinically approved and have limited efficacy. Small double-stranded RNAs that induce RNAi represent a new class of promising anti-adenoviral therapeutics. However, as yet, their efficiency to treat hAd5 infections has only been investigated in vitro. In this study, we analyzed artificial microRNAs (amiRs) delivered by self-complementary adeno-associated virus (scAAV) vectors for treatment of hAd5 infections in immunosuppressed Syrian hamsters. In vitro evaluation of amiRs targeting the E1A, pTP, IVa2, and hexon genes of hAd5 revealed that two scAAV vectors containing three copies of amiR-pTP and three copies of amiR-E1A, or six copies of amiR-pTP, efficiently inhibited hAd5 replication and improved the viability of hAd5-infected cells. Prophylactic application of amiR-pTP/amiR-E1A- and amiR-pTP-expressing scAAV9 vectors, respectively, to immunosuppressed Syrian hamsters resulted in the reduction of hAd5 levels in the liver of up to two orders of magnitude and in reduction of liver damage. Concomitant application of the vectors also resulted in a decrease of hepatic hAd5 infection. No side effects were observed. These data demonstrate anti-adenoviral RNAi as a promising new approach to combat hAd5 infection.
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Abstract
Gene therapy was originally thought to cover replacement of malfunctioning genes in treatment of various diseases. Today, the field has been expanded to application of viral and non-viral vectors for delivery of recombinant proteins for the compensation of missing or insufficient proteins, anti-cancer genes and proteins for destruction of tumor cells, immunostimulatory genes and proteins for stimulation of the host defense system against viral agents and tumors. Recently, the importance of RNA interference and its application in gene therapy has become an attractive alternative for drug development.
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Safdari Y, Ahmadzadeh V, Khalili M, Jaliani HZ, Zarei V, Erfani-Moghadam V. Use of single chain antibody derivatives for targeted drug delivery. Mol Med 2016; 22:258-270. [PMID: 27249008 DOI: 10.2119/molmed.2016.00043] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/22/2016] [Indexed: 01/01/2023] Open
Abstract
Single chain antibodies (scFvs), which contain only the variable domains of full-length antibodies, are relatively small molecules that can be used for selective drug delivery. In this review, we display how scFv antibodies help improve the specificity and efficiency of drugs. Small interfering RNA (siRNA) delivery using scFv-drug fusion peptides, siRNA delivery using scFv-conjugated nanoparticles, targeted delivery using scFv-viral peptide- fusion proteins, use of scFv in fusion with cell penetrating peptides for effective targeted drug delivery, scFv-mediated targeted delivery of inorganic nanoparticles, scFv-mediated increase of tumor killing activity of granulocytes, use of scFv for tumor imaging, site-directed conjugation of scFv molecules to drug carrier systems, use of scFv to relieve pain, use of scFv for increasing drug loading efficiency are among the topics that are discussed here.
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Affiliation(s)
- Yaghoub Safdari
- Medical Cellular and Molecular Research Center, Golestan University of Medical Sciences, Gorgan, Iran.,Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Vahideh Ahmadzadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Masoumeh Khalili
- Golestan Research Center of Gastroenterology and Hepatology (GRCGH), Golestan University of Medical Sciences, Gorgan, Iran
| | - Hossein Zarei Jaliani
- Department of Advanced Medical Sciences and Technologies, School of Paramedicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Vahid Zarei
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, Iran
| | - Vahid Erfani-Moghadam
- Medical Cellular and Molecular Research Center, Golestan University of Medical Sciences, Gorgan, Iran.,Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Golestan University of Medical Sciences, Gorgan, Iran
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