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Padilla-Martínez II, Cruz A, García-Báez EV, Rosales-Hernández MC, Mendieta Wejebe JE. N-substitution Reactions of 2-Aminobenzimidazoles to Access Pharmacophores. Curr Org Synth 2023; 20:177-219. [PMID: 35272598 DOI: 10.2174/1570179419666220310124223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 12/22/2021] [Accepted: 12/31/2021] [Indexed: 11/22/2022]
Abstract
Benzimidazole (BI) and its derivatives are interesting molecules in medicinal chemistry because several of these compounds have a diversity of biological activities and some of them are even used in clinical applications. In view of the importance of these compounds, synthetic chemists are still interested in finding new procedures for the synthesis of these classes of compounds. Astemizole (antihistaminic), Omeprazole (antiulcerative), and Rabendazole (fungicide) are important examples of compounds used in medicinal chemistry containing BI nuclei. It is interesting to observe that several of these compounds contain 2-aminobenzimidazole (2ABI) as the base nucleus. The structures of 2ABI derivatives are interesting because they have a planar delocalized structure with a cyclic guanidine group, which have three nitrogen atoms with free lone pairs and labile hydrogen atoms. The 10-π electron system of the aromatic BI ring conjugated with the nitrogen lone pair of the hexocyclic amino group, making these heterocycles to have an amphoteric character. Synthetic chemists have used 2ABI as a building block to produce BI derivatives as medicinally important molecules. In view of the importance of the BIs, and because no review was found in the literature about this topic, we reviewed and summarized the procedures related to the recent methodologies used in the N-substitution reactions of 2ABIs by using aliphatic and aromatic halogenides, dihalogenides, acid chlorides, alkylsulfonic chlorides, carboxylic acids, esters, ethyl chloroformates, anhydrides, SMe-isothioureas, alcohols, alkyl cyanates, thiocyanates, carbon disulfide and aldehydes or ketones to form Schiff bases. The use of diazotized 2ABI as intermediate to obtain 2-diazoBIs was included to produce Nsubstituted 2ABIs of pharmacological interest. Some commentaries about their biological activity were included.
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Affiliation(s)
- Itzia I Padilla-Martínez
- Laboratorio de Química Supramolecular y Nanociencias, Instituto Politécnico Nacional UPIBI, Av. Acueducto s/n, Barrio la Laguna Ticomán, Ciudad de México, 07340, Mexico
| | - Alejandro Cruz
- Laboratorio de Química Supramolecular y Nanociencias, Instituto Politécnico Nacional UPIBI, Av. Acueducto s/n, Barrio la Laguna Ticomán, Ciudad de México, 07340, Mexico
| | - Efrén V García-Báez
- Laboratorio de Química Supramolecular y Nanociencias, Instituto Politécnico Nacional UPIBI, Av. Acueducto s/n, Barrio la Laguna Ticomán, Ciudad de México, 07340, Mexico
| | - Martha C Rosales-Hernández
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Salvador Díaz Mirón s/n, Casco de Santo Tomás, Distrito Federal 11340, México
| | - Jessica E Mendieta Wejebe
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Salvador Díaz Mirón s/n, Casco de Santo Tomás, Distrito Federal 11340, México
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2
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De Clercq E. FV-100 for the Treatment of Varicella-Virus (VZV) Infections: Quo Vadis? Viruses 2022; 14:v14040770. [PMID: 35458500 PMCID: PMC9028626 DOI: 10.3390/v14040770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 01/15/2023] Open
Abstract
The bicyclic nucleoside analogue (BCNA) Cf1743 and its orally bioavailable prodrug FV-100 have unique potential as varicella-zoster virus (VZV) inhibitors to treat herpes zoster (shingles) and the therewith associated pain, including post-herpetic neuralgia (PHN). The anti-VZV activity of Cf1743 depends on a specific phosphorylation by the VZV-encoded thymidine kinase (TK). The target of antiviral action is assumed to be the viral DNA polymerase (or DNA synthesis in the virus-infected cells).
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Affiliation(s)
- Erik De Clercq
- Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, 3000 Leuven, Belgium
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3
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Thieulent C, Hue ES, Sutton G, Fortier C, Dallemagne P, Zientara S, Munier-Lehmann H, Hans A, Paillot R, Vidalain PO, Pronost S. Identification of antiviral compounds against equid herpesvirus-1 using real-time cell assay screening: Efficacy of decitabine and valganciclovir alone or in combination. Antiviral Res 2020; 183:104931. [PMID: 32926887 DOI: 10.1016/j.antiviral.2020.104931] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/28/2020] [Accepted: 09/06/2020] [Indexed: 12/15/2022]
Abstract
Equid herpesvirus-1 infections cause respiratory, neurological and reproductive syndromes. Despite preventive treatments with vaccines, resurgence of EHV-1 infection still constitutes a major threat to equine industry. However, no antiviral compound is available to treat infected horses. In this study, 2891 compounds were screened against EHV-1 using impedance measurement. 22 compounds have been found to be effective in vitro against EHV-1. Valganciclovir, ganciclovir, decitabine, aphidicolin, idoxuridine and pritelivir (BAY 57-1293) are the most effective compounds identified, and their antiviral potency was further assessed on E. Derm, RK13 and EEK cells and against 3 different field strains of EHV-1 (ORF30 2254 A/G/C). We also provide evidences of synergistic interactions between valganciclovir and decitabine in our in vitro antiviral assay as determined by MacSynergy II, isobologramm and Chou-Talalay methods. Finally, we showed that deoxycytidine reverts the antiviral effect of decitabine, thus supporting some competition at the level of nucleoside phosphorylation by deoxycytidine kinase and/or DNA synthesis. Deoxycitidine analogues, like decitabine, is a family of compounds identified for the first time with promising antiviral efficacy against herpesviruses.
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Affiliation(s)
- Côme Thieulent
- LABÉO Frank Duncombe, 14280, Saint-Contest, France; Normandie Univ, Unicaen, BIOTARGEN EA7450, 14280, Saint-Contest, France
| | - Erika S Hue
- LABÉO Frank Duncombe, 14280, Saint-Contest, France; Normandie Univ, Unicaen, BIOTARGEN EA7450, 14280, Saint-Contest, France; Normandie Univ, UNICAEN, ImpedanCELL, 14280, Saint-Contest, France
| | - Gabrielle Sutton
- LABÉO Frank Duncombe, 14280, Saint-Contest, France; Normandie Univ, Unicaen, BIOTARGEN EA7450, 14280, Saint-Contest, France
| | - Christine Fortier
- LABÉO Frank Duncombe, 14280, Saint-Contest, France; Normandie Univ, Unicaen, BIOTARGEN EA7450, 14280, Saint-Contest, France; Normandie Univ, UNICAEN, ImpedanCELL, 14280, Saint-Contest, France
| | | | - Stephan Zientara
- Université Paris-Est, Laboratoire de Santé Animale, ANSES, INRAE, ENVA, UMR 1161 Virologie, 94700, Maisons-Alfort, France
| | - Hélène Munier-Lehmann
- Institut Pasteur, Unité de Chimie et Biocatalyse, CNRS UMR 3523, 75015, Paris, France
| | - Aymeric Hans
- ANSES, Laboratoire de Santé Animale, Site de Normandie, PhEED Unit, 14430, Goustranville, France
| | - Romain Paillot
- LABÉO Frank Duncombe, 14280, Saint-Contest, France; Normandie Univ, Unicaen, BIOTARGEN EA7450, 14280, Saint-Contest, France
| | - Pierre-Olivier Vidalain
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, F-69007, Lyon, France; Equipe Chimie et Biologie, Modélisation et Immunologie pour La Thérapie (CBMIT), Université Paris Descartes, CNRS UMR 8601, 75006, Paris, France
| | - Stéphane Pronost
- LABÉO Frank Duncombe, 14280, Saint-Contest, France; Normandie Univ, Unicaen, BIOTARGEN EA7450, 14280, Saint-Contest, France; Normandie Univ, UNICAEN, ImpedanCELL, 14280, Saint-Contest, France.
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4
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Pastuch-Gawołek G, Gillner D, Król E, Walczak K, Wandzik I. Selected nucleos(t)ide-based prescribed drugs and their multi-target activity. Eur J Pharmacol 2019; 865:172747. [PMID: 31634460 PMCID: PMC7173238 DOI: 10.1016/j.ejphar.2019.172747] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 12/13/2022]
Abstract
Nucleos(t)ide analogues play pivotal roles as antiviral, cytotoxic or immunosuppressive agents. Here, we review recent reports of nucleoside analogues that exhibit broad-spectrum activity towards multiple life-threatening RNA and DNA viruses. We also present a discussion about nucleoside antimetabolites-approved antineoplastic agents-that have recently been shown to have antiviral and/or antibacterial activity. The approved drugs and drug combinations, as well as recently identified candidates for investigation and/or experimentation, are discussed. Several examples of repurposed drugs that have already been approved for use are presented. This strategy can be crucial for the first-line treatment of acute infections or coinfections and for the management of drug-resistant strains.
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Affiliation(s)
- Gabriela Pastuch-Gawołek
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland; Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland
| | - Danuta Gillner
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland; Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland
| | - Ewelina Król
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
| | - Krzysztof Walczak
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland
| | - Ilona Wandzik
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland; Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland.
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5
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Brincidofovir (CMX001) Toxicity Associated With Epithelial Apoptosis and Crypt Drop Out in a Hematopoietic Cell Transplant Patient: Challenges in Distinguishing Drug Toxicity From GVHD. J Pediatr Hematol Oncol 2018; 40:e364-e368. [PMID: 29846280 PMCID: PMC6059994 DOI: 10.1097/mph.0000000000001227] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Brincidofovir (CMX001) is an oral agent with activity against double-strand DNA viruses undergoing clinical trials in immunocompromised patients. We report a patient clinically diagnosed with brincidofovir-related gastrointestinal (GI) toxicity and his histologic findings. A 2-year-old boy with medulloblastoma undergoing autologous hematopoietic cell transplantation developed adenovirus viremia 9 days posttransplant. After initial treatment with intravenous cidofovir he was started on oral brincidofovir as part of a clinical trial. He developed hematochezia, anorexia, and emesis 11 weeks later. Sigmoid colon biopsy showed marked crypt drop out, moderate epithelial apoptosis, and lamina propria edema. The pathologic diagnosis was drug-related injury versus infection. Brincidofovir toxicity was diagnosed clinically and the drug was discontinued. His GI symptoms improved in 2 weeks with supportive care and octreotide. Brincidofovir causes GI toxicity and histologically demonstrates epithelial apoptosis and crypt injury, similar to graft versus host disease and mycophenolate mofetil toxicity.
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6
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Wong KZ, Chu JJH. The Interplay of Viral and Host Factors in Chikungunya Virus Infection: Targets for Antiviral Strategies. Viruses 2018; 10:E294. [PMID: 29849008 PMCID: PMC6024654 DOI: 10.3390/v10060294] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/13/2018] [Accepted: 05/28/2018] [Indexed: 12/14/2022] Open
Abstract
Chikungunya virus (CHIKV) has re-emerged as one of the many medically important arboviruses that have spread rampantly across the world in the past decade. Infected patients come down with acute fever and rashes, and a portion of them suffer from both acute and chronic arthralgia. Currently, there are no targeted therapeutics against this debilitating virus. One approach to develop potential therapeutics is by understanding the viral-host interactions. However, to date, there has been limited research undertaken in this area. In this review, we attempt to briefly describe and update the functions of the different CHIKV proteins and their respective interacting host partners. In addition, we also survey the literature for other reported host factors and pathways involved during CHIKV infection. There is a pressing need for an in-depth understanding of the interaction between the host environment and CHIKV in order to generate potential therapeutics.
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Affiliation(s)
- Kai Zhi Wong
- Laboratory of Molecular RNA Virology & Antiviral Strategies, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, National University Health System, 5 Science Drive 2, National University of Singapore, Singapore 117597, Singapore.
| | - Justin Jang Hann Chu
- Laboratory of Molecular RNA Virology & Antiviral Strategies, Department of Microbiology & Immunology, Yong Loo Lin School of Medicine, National University Health System, 5 Science Drive 2, National University of Singapore, Singapore 117597, Singapore.
- Institute of Molecular & Cell Biology, Agency for Science, Technology & Research (A*STAR), 61 Biopolis Drive, Proteos #06-05, Singapore 138673, Singapore.
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7
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A Abdullah A, Abdullah R, A Nazariah Z, N Balakrishnan K, Firdaus J Abdullah F, A Bala J, Mohd-Lila MA. Cyclophilin A as a target in the treatment of cytomegalovirus infections. Antivir Chem Chemother 2018; 26:2040206618811413. [PMID: 30449131 PMCID: PMC6243413 DOI: 10.1177/2040206618811413] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 10/12/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Viruses are obligate parasites that depend on the cellular machinery of the host to regenerate and manufacture their proteins. Most antiviral drugs on the market today target viral proteins. However, the more recent strategies involve targeting the host cell proteins or pathways that mediate viral replication. This new approach would be effective for most viruses while minimizing drug resistance and toxicity. METHODS Cytomegalovirus replication, latency, and immune response are mediated by the intermediate early protein 2, the main protein that determines the effectiveness of drugs in cytomegalovirus inhibition. This review explains how intermediate early protein 2 can modify the action of cyclosporin A, an immunosuppressive, and antiviral drug. It also links all the pathways mediated by cyclosporin A, cytomegalovirus replication, and its encoded proteins. RESULTS Intermediate early protein 2 can influence the cellular cyclophilin A pathway, affecting cyclosporin A as a mediator of viral replication or anti-cytomegalovirus drug. CONCLUSION Cyclosporin A has a dual function in cytomegalovirus pathogenesis. It has the immunosuppressive effect that establishes virus replication through the inhibition of T-cell function. It also has an anti-cytomegalovirus effect mediated by intermediate early protein 2. Both of these functions involve cyclophilin A pathway.
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Affiliation(s)
- Ashwaq A Abdullah
- 1 Institute of Bioscience, University Putra Malaysia, Serdang, Selangor D.E, Malaysia
- 2 Department of Microbiology, Faculty of Applied Science, Taiz University, Taiz, Yemen
| | - Rasedee Abdullah
- 1 Institute of Bioscience, University Putra Malaysia, Serdang, Selangor D.E, Malaysia
- 3 Department of Veterinary Laboratory Diagnosis, Universiti Putra Malaysia, Serdang, Selangor D.E, Malaysia
| | - Zeenathul A Nazariah
- 1 Institute of Bioscience, University Putra Malaysia, Serdang, Selangor D.E, Malaysia
- 4 Department of Pathology and Microbiology, Universiti Putra Malaysia, Serdang, Selangor D.E, Malaysia
| | - Krishnan N Balakrishnan
- 4 Department of Pathology and Microbiology, Universiti Putra Malaysia, Serdang, Selangor D.E, Malaysia
| | - Faez Firdaus J Abdullah
- 5 Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor D.E, Malaysia
| | - Jamilu A Bala
- 4 Department of Pathology and Microbiology, Universiti Putra Malaysia, Serdang, Selangor D.E, Malaysia
- 6 Department of Medical Laboratory Science, Faculty of Allied Health Sciences, Bayero University Kano, Kano, Nigeria
| | - Mohd-Azmi Mohd-Lila
- 1 Institute of Bioscience, University Putra Malaysia, Serdang, Selangor D.E, Malaysia
- 4 Department of Pathology and Microbiology, Universiti Putra Malaysia, Serdang, Selangor D.E, Malaysia
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8
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Stegman JR, Margulies BJ. The human cytomegalovirus chemokine receptor homolog encoded by US27. Virus Genes 2017; 53:516-521. [DOI: 10.1007/s11262-017-1462-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 04/21/2017] [Indexed: 12/12/2022]
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9
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Ebola Virus Infection: Overview and Update on Prevention and Treatment. Infect Dis Ther 2015; 4:365-90. [PMID: 26363787 PMCID: PMC4675769 DOI: 10.1007/s40121-015-0079-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Indexed: 11/08/2022] Open
Abstract
In 2014 and 2015, the largest Ebola virus disease (EVD) outbreak in history affected large populations across West Africa. The goal of this report is to provide an update on the epidemic and review current progress in the development,
evaluation and deployment of prevention and treatment strategies for EVD. Relevant information was identified through a comprehensive literature search using Medline, PubMed and CINAHL Complete and using the search terms Ebola, Ebola virus disease, Ebola hemorrhagic fever, West Africa outbreak, Ebola transmission, Ebola symptoms and signs, Ebola diagnosis, Ebola treatment, vaccines for Ebola and clinical trials on Ebola. Through 22 July 2015, a total of 27,741 EVD cases and 11,284 deaths were reported from all affected countries. Several therapeutic agents and novel vaccines for EVD have been developed and are now undergoing evaluation. Concurrent with active case investigation, contact tracing, surveillance and supportive care to patients and communities, there has been rapid progress in the development of new therapies and vaccines against EVD. Continued focus on strengthening clinical and public health infrastructure will have direct benefits in controlling the spread of EVD and will provide a strong foundation for deployment of new drugs and vaccines to affected countries when they become available. The unprecedented West Africa Ebola outbreak, response measures, and ensuing drug and vaccine development suggest that new tools for Ebola control may be available in the near future.
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10
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The Interaction between Cyclin B1 and Cytomegalovirus Protein Kinase pUL97 is Determined by an Active Kinase Domain. Viruses 2015; 7:4582-601. [PMID: 26270673 PMCID: PMC4576195 DOI: 10.3390/v7082834] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 07/12/2015] [Accepted: 07/27/2015] [Indexed: 02/06/2023] Open
Abstract
Replication of human cytomegalovirus (HCMV) is characterized by a tight virus-host cell interaction. Cyclin-dependent protein kinases (CDKs) are functionally integrated into viral gene expression and protein modification. The HCMV-encoded protein kinase pUL97 acts as a CDK ortholog showing structural and functional similarities. Recently, we reported an interaction between pUL97 kinase with a subset of host cyclins, in particular with cyclin T1. Here, we describe an interaction of pUL97 at an even higher affinity with cyclin B1. As a striking feature, the interaction between pUL97 and cyclin B1 proved to be strictly dependent on pUL97 activity, as interaction could be abrogated by treatment with pUL97 inhibitors or by inserting mutations into the conserved kinase domain or the nonconserved C-terminus of pUL97, both producing loss of activity. Thus, we postulate that the mechanism of pUL97-cyclin B1 interaction is determined by an active pUL97 kinase domain.
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11
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Synthesis of 2-(6-aminopurin-9-ylmethyl)-2-methyldi(tetra)hydrofuran-4-ylphosphonic acids — novel nucleotide analogs with P-C bonds. Russ Chem Bull 2015. [DOI: 10.1007/s11172-014-0776-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Reprint of: Recent Advances in Cytomegalovirus: An Update on Pharmacologic and Cellular Therapies. Biol Blood Marrow Transplant 2015; 21:S19-24. [DOI: 10.1016/j.bbmt.2014.12.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 11/03/2014] [Indexed: 12/18/2022]
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13
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Li H, Ying T, Yu F, Lu L, Jiang S. Development of therapeutics for treatment of Ebola virus infection. Microbes Infect 2014; 17:109-17. [PMID: 25498866 DOI: 10.1016/j.micinf.2014.11.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 11/25/2014] [Accepted: 11/28/2014] [Indexed: 11/27/2022]
Abstract
Ebola virus infection can cause Ebola virus disease (EVD). Patients usually show severe symptoms, and the fatality rate can reach up to 90%. No licensed medicine is available. In this review, development of therapeutics for treatment of Ebola virus infection and EVD will be discussed.
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Affiliation(s)
- Haoyang Li
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Rd., Xuhui District, Shanghai 200032, China
| | - Tianlei Ying
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Rd., Xuhui District, Shanghai 200032, China
| | - Fei Yu
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Rd., Xuhui District, Shanghai 200032, China
| | - Lu Lu
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Rd., Xuhui District, Shanghai 200032, China.
| | - Shibo Jiang
- Key Lab of Medical Molecular Virology of MOE/MOH, Shanghai Medical College, Fudan University, 130 Dong An Rd., Xuhui District, Shanghai 200032, China; Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY 10065, USA.
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14
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Gable J, Acker TM, Craik CS. Current and potential treatments for ubiquitous but neglected herpesvirus infections. Chem Rev 2014; 114:11382-412. [PMID: 25275644 PMCID: PMC4254030 DOI: 10.1021/cr500255e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Indexed: 02/07/2023]
Affiliation(s)
- Jonathan
E. Gable
- Department
of Pharmaceutical Chemistry, University
of California, San Francisco, 600 16th Street, San Francisco, California 94158-2280, United States
- Graduate
Group in Biophysics, University of California,
San Francisco, 600 16th
Street, San Francisco, California 94158-2280, United States
| | - Timothy M. Acker
- Department
of Pharmaceutical Chemistry, University
of California, San Francisco, 600 16th Street, San Francisco, California 94158-2280, United States
| | - Charles S. Craik
- Department
of Pharmaceutical Chemistry, University
of California, San Francisco, 600 16th Street, San Francisco, California 94158-2280, United States
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15
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James SH, Larson KB, Acosta EP, Prichard MN. Helicase-primase as a target of new therapies for herpes simplex virus infections. Clin Pharmacol Ther 2014; 97:66-78. [PMID: 25670384 DOI: 10.1002/cpt.3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 09/16/2014] [Indexed: 01/13/2023]
Abstract
The seminal discovery of acyclovir 40 years ago heralded the modern era of truly selective antiviral therapies and this drug remains the therapy of choice for herpes simplex virus infections. Yet by modern standards, its antiviral activity is modest and new drugs against novel molecular targets such as the helicase-primase have the potential to improve clinical outcome, particularly in high-risk patients. A brief synopsis of current therapies for these infections and clinical need is provided to help provide an initial perspective. The function of the helicase-primase complex is then summarized and the development of new inhibitors of the helicase-primase complex, such as pritelivir and amenamevir, is discussed. We review their mechanism of action, propensity for drug resistance, and pharmacokinetic characteristics and discuss their potential to advance current therapeutic options. Strategies that include combinations of these inhibitors with acyclovir are also considered, as they will likely maximize clinical efficacy.
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Affiliation(s)
- S H James
- Division of Infectious Diseases, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, USA
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16
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Recent advances in cytomegalovirus: an update on pharmacologic and cellular therapies. Biol Blood Marrow Transplant 2014; 21:24-9. [PMID: 25452035 DOI: 10.1016/j.bbmt.2014.11.002] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 11/03/2014] [Indexed: 12/19/2022]
Abstract
The 2015 Tandem American Society for Blood and Marrow Transplantation/Center for International Blood and Marrow Transplant Meetings provide an opportunity to review the current status and future perspectives on therapy for cytomegalovirus (CMV) infection in the setting of hematopoietic stem cell transplantation (HSCT). After many years during which we have seen few tangible advances in terms of new antiviral drugs, we are now experiencing an exciting period of late-stage drug development, characterized by a series of phase III trials incorporating a variety of novel agents. These trials have the potential to shift our current standard therapeutic strategies, which generally involve pre-emptive therapy based on sensitive molecular surveillance, towards the prophylactic approaches we see more generally with other herpes viruses such as herpes simplex and varicella zoster. This comes at a time when the promise of extensive preclinical research has been translated into encouraging clinical responses with several cellular immunotherapy strategies, which have also been moved towards definitive late-stage clinical trials. How these approaches will be integrated with the new wave of antiviral drugs remains open to conjecture. Although most of the focus of these cellular immunotherapy studies has been on adaptive immunity, and in particular T cells, an increasing awareness of the possible role of other cellular subsets in controlling CMV infection has developed. In particular, the role of natural killer (NK) cells is being revisited, along with that of γδ T cells. Depletion of NK cells in mice results in higher titers of murine CMV in tissues and increased mortality, whereas NK cell deficiency in humans has been linked to severe CMV disease. We will review recent progress in these areas.
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Dunn JP. An overview of current and future treatment options for patients with cytomegalovirus retinitis. Expert Opin Orphan Drugs 2014. [DOI: 10.1517/21678707.2014.945906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Marcelin JR, Beam E, Razonable RR. Cytomegalovirus infection in liver transplant recipients: Updates on clinical management. World J Gastroenterol 2014; 20:10658-10667. [PMID: 25152570 PMCID: PMC4138447 DOI: 10.3748/wjg.v20.i31.10658] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 01/24/2014] [Accepted: 04/03/2014] [Indexed: 02/06/2023] Open
Abstract
Cytomegalovirus (CMV) infection is a common complication after liver transplantation, and it is associated with multiple direct and indirect effects. Management of CMV infection and disease has evolved over the years, and clinical guidelines have been recently updated. Universal antiviral prophylaxis and a pre-emptive treatment strategy are options for prevention. A currently-recruiting randomized clinical trial is comparing the efficacy and safety of the two prevention strategies in the highest risk D+R- liver recipients. Drug-resistant CMV infection remains uncommon but is now increasing in incidence. This highlights the currently limited therapeutic options, and the need for novel drug discoveries. Immunotherapy and antiviral drugs with novel mechanisms of action are being investigated, including letermovir (AIC246) and brincidofovir (CMX001). This article reviews the current state of CMV management after liver transplantation, including the updated practice guidelines, and summarizes the data on investigational drugs and vaccines in clinical development.
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Clinical utility of viral load in management of cytomegalovirus infection after solid organ transplantation. Clin Microbiol Rev 2014; 26:703-27. [PMID: 24092851 DOI: 10.1128/cmr.00015-13] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The negative impact of cytomegalovirus (CMV) infection on transplant outcomes warrants efforts toward improving its prevention, diagnosis, and treatment. During the last 2 decades, significant breakthroughs in diagnostic virology have facilitated remarkable improvements in CMV disease management. During this period, CMV nucleic acid amplification testing (NAT) evolved to become one of the most commonly performed tests in clinical virology laboratories. NAT provides a means for rapid and sensitive diagnosis of CMV infection in transplant recipients. Viral quantification also introduced several principles of CMV disease management. Specifically, viral load has been utilized (i) for prognostication of CMV disease, (ii) to guide preemptive therapy, (iii) to assess the efficacy of antiviral treatment, (iv) to guide the duration of treatment, and (v) to indicate the risk of clinical relapse or antiviral drug resistance. However, there remain important limitations that require further optimization, including the interassay variability in viral load reporting, which has limited the generation of standardized viral load thresholds for various clinical indications. The recent introduction of an international reference standard should advance the major goal of uniform viral load reporting and interpretation. However, it has also become apparent that other aspects of NAT should be standardized, including sample selection, nucleic acid extraction, amplification, detection, and calibration, among others. This review article synthesizes the vast amount of information on CMV NAT and provides a timely review of the clinical utility of viral load testing in the management of CMV in solid organ transplant recipients. Current limitations are highlighted, and avenues for further research are suggested to optimize the clinical application of NAT in the management of CMV after transplantation.
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Human cytomegalovirus UL97 kinase is involved in the mechanism of action of methylenecyclopropane analogs with 6-ether and -thioether substitutions. Antimicrob Agents Chemother 2013; 58:274-8. [PMID: 24145545 DOI: 10.1128/aac.01726-13] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Methylenecyclopropane nucleoside (MCPN) analogs are being investigated for treatment of human cytomegalovirus (HCMV) infection because of favorable preclinical data and limited ganciclovir cross-resistance. Monohydroxymethyl MCPNs bearing ether and thioether functionalities at the purine 6 position have antiviral activity against herpes simplex virus (HSV) and varicella-zoster virus (VZV) in addition to HCMV. The role of the HCMV UL97 kinase in the mechanism of action of these derivatives was examined. When tested against a kinase-inactive UL97 K355M virus, a moderate 5- to 7-fold increase in 50% effective concentration (EC50) was observed, in comparison to a 13- to 25-fold increase for either cyclopropavir or ganciclovir. Serial propagation of HCMV under two of these compounds selected for three novel UL97 mutations encoding amino acid substitutions D456N, C480R,and Y617del. When transferred to baseline laboratory HCMV strains, these mutations individually conferred resistance to all of the tested MCPNs, ganciclovir, and maribavir. However, the engineered strains also demonstrated severe growth defects and abnormal cytopathic effects similar to the kinase-inactive mutant. Expressed and purified UL97 kinase showed in vitro phosphorylation of the newly tested MCPNs. Thus, HCMV UL97 kinase is involved in the antiviral action of these MCPNs, but the in vitro selection of UL97-defective viruses suggests that their activity against more typical ganciclovir-resistant growth-competent UL97 mutants may be relatively preserved.
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Prichard MN, Williams JD, Komazin-Meredith G, Khan AR, Price NB, Jefferson GM, Harden EA, Hartline CB, Peet NP, Bowlin TL. Synthesis and antiviral activities of methylenecyclopropane analogs with 6-alkoxy and 6-alkylthio substitutions that exhibit broad-spectrum antiviral activity against human herpesviruses. Antimicrob Agents Chemother 2013; 57:3518-27. [PMID: 23669381 PMCID: PMC3719742 DOI: 10.1128/aac.00429-13] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 05/06/2013] [Indexed: 11/20/2022] Open
Abstract
Methylenecyclopropane nucleosides have been reported to be active against many of the human herpesviruses. The most active compound of this class is cyclopropavir (CPV), which exhibits good antiviral activity against human cytomegalovirus (HCMV), Epstein-Barr virus, both variants of human herpesvirus 6, and human herpesvirus 8. CPV has two hydroxymethyl groups on the methylenecyclopropane ring, but analogs with a single hydroxymethyl group, such as the prototypical (S)-synguanol, are also active and exhibit a broader spectrum of antiviral activity that also includes hepatitis B virus and human immunodeficiency virus. Here, a large set of monohydroxymethyl compounds with ether and thioether substituents at the 6 position of the purine was synthesized and evaluated for antiviral activity against a range of human herpesviruses. Some of these analogs had a broader spectrum of antiviral activity than CPV, in that they also inhibited the replication of herpes simplex viruses 1 and 2 and varicella-zoster virus. Interestingly, the antiviral activity of these compounds appeared to be dependent on the activity of the HCMV UL97 kinase but was relatively unaffected by the absence of thymidine kinase activity in HSV. These data taken together indicate that the mechanism of action of these analogs is distinct from that of CPV. They also suggest that they might be useful as broad-spectrum antiherpesvirus agents and may be effective in the treatment of resistant virus infections.
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Affiliation(s)
- Mark N Prichard
- University of Alabama at Birmingham, Birmingham, Alabama, USA.
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22
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Advances in the development of nucleoside and nucleotide analogues for cancer and viral diseases. Nat Rev Drug Discov 2013; 12:447-64. [PMID: 23722347 DOI: 10.1038/nrd4010] [Citation(s) in RCA: 812] [Impact Index Per Article: 73.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nucleoside analogues have been in clinical use for almost 50 years and have become cornerstones of treatment for patients with cancer or viral infections. The approval of several additional drugs over the past decade demonstrates that this family still possesses strong potential. Here, we review new nucleoside analogues and associated compounds that are currently in preclinical or clinical development for the treatment of cancer and viral infections, and that aim to provide increased response rates and reduced side effects. We also highlight the different approaches used in the development of these drugs and the potential of personalized therapy.
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23
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James SH, Price NB, Hartline CB, Lanier ER, Prichard MN. Selection and recombinant phenotyping of a novel CMX001 and cidofovir resistance mutation in human cytomegalovirus. Antimicrob Agents Chemother 2013; 57:3321-5. [PMID: 23650158 PMCID: PMC3697342 DOI: 10.1128/aac.00062-13] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 04/26/2013] [Indexed: 02/07/2023] Open
Abstract
CMX001 is an orally available lipid acyclic nucleotide phosphonate that delivers high intracellular levels of cidofovir (CDV)-diphosphate and exhibits enhanced in vitro antiviral activity against a wide range of double-stranded DNA viruses, including cytomegalovirus (CMV). Mutations in the DNA polymerase of CMV that impart resistance to CDV also render the virus resistant to CMX001. Here, we report a novel resistance mutation that arose under the selective pressure of CMX001. The wild-type CMV strain AD169 was propagated in human foreskin fibroblasts under increasing concentrations of CMX001 over 10 months, and the resulting strain (named CMX001(R)) was less susceptible to CDV and CMX001 in a plaque reduction assay. Genotypic analysis of virus strain CMX001(R) via conventional sequencing of the genes encoding the CMV DNA polymerase (UL54) and UL97 kinase (UL97) demonstrated one mutation that changed the wild-type aspartate to glutamate at position 542 in UL54. A recombinant virus with this novel D542E mutation was generated via bacterial artificial chromosome-mediated marker transfer experiments. Subsequent phenotypic resistance analysis of the D542E mutant demonstrated reductions in susceptibility of greater than 10-fold to CMX001 and CDV, but no resistance to foscarnet (FOS) or ganciclovir (GCV). Analysis of replicative fitness showed that both strain CMX001(R) and the D542E mutant viruses demonstrated a smaller plaque phenotype and slower replication kinetics than their respective parent viruses. These data describe the first resistance mutation generated under the selective pressure of CMX001 and suggest that CMX001 may have a unique resistance profile associated with reduced viral replication and maintenance of sensitivity to FOS and GCV.
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Affiliation(s)
- Scott H. James
- University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Nathan B. Price
- University of Alabama at Birmingham, Birmingham, Alabama, USA
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Yang K, Wills E, Baines JD. A herpes simplex virus scaffold peptide that binds the portal vertex inhibits early steps in viral replication. J Virol 2013; 87:6876-87. [PMID: 23576509 PMCID: PMC3676109 DOI: 10.1128/jvi.00421-13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Accepted: 04/03/2013] [Indexed: 12/12/2022] Open
Abstract
Previous experiments identified a 12-amino-acid (aa) peptide that was sufficient to interact with the herpes simplex virus 1 (HSV-1) portal protein and was necessary to incorporate the portal into capsids. In the present study, cells were treated at various times postinfection with peptides consisting of a portion of the Drosophila antennapedia protein, previously shown to enter cells efficiently, fused to either wild-type HSV-1 scaffold peptide (YPYYPGEARGAP) or a control peptide that contained changes at positions 4 and 5. These 4-tyrosine and 5-proline residues are highly conserved in herpesvirus scaffold proteins and were previously shown to be critical for the portal interaction. Treatment early in infection with subtoxic levels of wild-type peptide reduced viral infectivity by over 1,000-fold, while the mutant peptide had little effect on viral yields. In cells infected for 3 h in the presence of wild-type peptide, capsids were observed to transit to the nuclear rim normally, as viewed by fluorescence microscopy. However, observation by electron microscopy in thin sections revealed an aberrant and significant increase of DNA-containing capsids compared to infected cells treated with the mutant peptide. Early treatment with peptide also prevented formation of viral DNA replication compartments. These data suggest that the antiviral peptide stabilizes capsids early in infection, causing retention of DNA within them, and that this activity correlates with peptide binding to the portal protein. The data are consistent with the hypothesis that the portal vertex is the conduit through which DNA is ejected to initiate infection.
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Affiliation(s)
- Kui Yang
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York, USA
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25
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Advances in the development of nucleoside and nucleotide analogues for cancer and viral diseases. NATURE REVIEWS. DRUG DISCOVERY 2013. [PMID: 23722347 DOI: 10.1038/nrd4010]] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nucleoside analogues have been in clinical use for almost 50 years and have become cornerstones of treatment for patients with cancer or viral infections. The approval of several additional drugs over the past decade demonstrates that this family still possesses strong potential. Here, we review new nucleoside analogues and associated compounds that are currently in preclinical or clinical development for the treatment of cancer and viral infections, and that aim to provide increased response rates and reduced side effects. We also highlight the different approaches used in the development of these drugs and the potential of personalized therapy.
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26
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Lin K, Gallay P. Curing a viral infection by targeting the host: the example of cyclophilin inhibitors. Antiviral Res 2013; 99:68-77. [PMID: 23578729 PMCID: PMC4332838 DOI: 10.1016/j.antiviral.2013.03.020] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 03/24/2013] [Accepted: 03/29/2013] [Indexed: 02/08/2023]
Abstract
Viruses exploit multiple host cell mechanisms for their own replication. These mechanisms may serve as targets for antiviral therapy. Host-targeted therapies may have a high barrier to resistance. Cyclophilin inhibitors have shown promise in curing chronic hepatitis C. Cyclophilin inhibitors may potentially be used to treat other viral infections.
Every step of the viral life cycle is dependent on the host, which potentially can be explored for antiviral targets. Historically, however, drug discovery has focused mainly on viral targets, because of their perceived specificity. Efforts to pursue host targets have been largely hampered by concern over potential on-target toxicity, the lack of predictive cell culture and animal models, and the complexity of host–virus interactions. On the other hand, there are distinct advantages of targeting the host, such as creating a high barrier to resistance, providing broad coverage of different genotypes/serotypes and possibly even multiple viruses, and expanding the list of potential targets, when druggable viral targets are limited. Taking hepatitis C virus (HCV) as the example, there are more than 20 inhibitors of the viral protease, polymerase and NS5A protein currently in advanced clinical testing. However, resistance has become a main challenge with these direct-acting antivirals, because HCV, an RNA virus, is notoriously prone to mutation, and a single mutation in the viral target may prevent the binding of an inhibitor, and rendering it ineffective. Host cyclophilin inhibitors have shown promising effects both in vitro and in patients to prevent the emergence of resistance and to cure HCV infection, either alone or in combination with other agents. They are also capable of blocking the replication of a number of other viral pathogens. While the road to developing host-targeting antivirals has been less traveled, and significant challenges remain, delivering the most effective antiviral regimen, which may comprise inhibitors of both host and viral targets, should be well worth the effort.
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Affiliation(s)
- Kai Lin
- Permeon Biologics, Inc., One Kendall Square, Cambridge, MA 02139, USA.
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27
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Management strategies for cytomegalovirus infection and disease in solid organ transplant recipients. Infect Dis Clin North Am 2013; 27:317-42. [PMID: 23714343 DOI: 10.1016/j.idc.2013.02.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cytomegalovirus is the most common viral pathogen that affects solid organ transplant recipients. It directly causes fever, myelosuppression, and tissue-invasive disease, and indirectly, it negatively impacts allograft and patient survival. Nucleic acid amplification testing is the preferred method to confirm the diagnosis of CMV infection. Prevention of CMV disease using antiviral prophylaxis or preemptive therapy is critical in the management of transplant patients. Intravenous ganciclovir and oral valganciclovir are the first line drugs for antiviral treatment. This article provides a comprehensive review of the current epidemiology, diagnosis, prevention and treatment of CMV infection in solid organ transplant recipients.
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28
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De Clercq E. A cutting-edge view on the current state of antiviral drug development. Med Res Rev 2013; 33:1249-77. [PMID: 23495004 DOI: 10.1002/med.21281] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Prominent in the current stage of antiviral drug development are: (i) for human immunodeficiency virus (HIV), the use of fixed-dose combinations (FDCs), the most recent example being Stribild(TM); (ii) for hepatitis C virus (HCV), the pleiade of direct-acting antivirals (DAAs) that should be formulated in the most appropriate combinations so as to obtain a cure of the infection; (iii)-(v) new strategies (i.e., AIC316, AIC246, and FV-100) for the treatment of herpesvirus infections: herpes simplex virus (HSV), cytomegalovirus (CMV), and varicella-zoster virus (VZV), respectively; (vi) the role of a new tenofovir prodrug, tenofovir alafenamide (TAF) (GS-7340) for the treatment of HIV infections; (vii) the potential use of poxvirus inhibitors (CMX001 and ST-246); (viii) the usefulness of new influenza virus inhibitors (peramivir and laninamivir octanoate); (ix) the position of the hepatitis B virus (HBV) inhibitors [lamivudine, adefovir dipivoxil, entecavir, telbivudine, and tenofovir disoproxil fumarate (TDF)]; and (x) the potential of new compounds such as FGI-103, FGI-104, FGI-106, dUY11, and LJ-001 for the treatment of filoviruses (i.e., Ebola). Whereas for HIV and HCV therapy is aimed at multiple-drug combinations, for all other viruses, HSV, CMV, VZV, pox, influenza, HBV, and filoviruses, current strategies are based on the use of single compounds.
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Affiliation(s)
- Erik De Clercq
- Rega Institute for Medical Research, KU Leuven, B-3000, Leuven, Belgium.
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29
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Antivirals: Past, present and future. Biochem Pharmacol 2013; 85:727-44. [DOI: 10.1016/j.bcp.2012.12.011] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 12/13/2012] [Accepted: 12/14/2012] [Indexed: 11/23/2022]
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30
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Razonable RR, Humar A. Cytomegalovirus in solid organ transplantation. Am J Transplant 2013; 13 Suppl 4:93-106. [PMID: 23465003 DOI: 10.1111/ajt.12103] [Citation(s) in RCA: 363] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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31
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Maribavir inhibits Epstein-Barr virus transcription through the EBV protein kinase. J Virol 2013; 87:5311-5. [PMID: 23449792 DOI: 10.1128/jvi.03505-12] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Maribavir (MBV) inhibits Epstein-Barr virus (EBV) replication and the enzymatic activity of the viral protein kinase BGLF4. MBV also inhibits expression of multiple EBV transcripts during EBV lytic infection. Here we demonstrate, with the use of a BGLF4 knockout virus, that effects of MBV on transcription take place primarily through inhibition of BGLF4. MBV inhibits viral genome copy numbers and infectivity to levels similar to and exceeding levels produced by BGLF4 knockout virus.
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Travi G, Pergam SA. Cytomegalovirus pneumonia in hematopoietic stem cell recipients. J Intensive Care Med 2013; 29:200-12. [PMID: 23753231 DOI: 10.1177/0885066613476454] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 10/23/2012] [Indexed: 01/29/2023]
Abstract
Cytomegalovirus (CMV) is a frequently encountered infection following hematopoietic cell transplantation, and tissue invasive pneumonia is a dreaded complication of the virus in this population. In this review of CMV pneumonia, we address epidemiology, pathogenesis, diagnostics, current therapy, and strategies to prevent the development of CMV. We also review emerging treatment and prevention options for this challenging disease.
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Affiliation(s)
- Giovanna Travi
- Department of Infectious Diseases, AO Ospedale Niguarda Cà Granda, Milan, Italy
| | - Steven A Pergam
- Vaccine and Infectious Diseases and Clinical Research Divisions, Fred Hutchinson Cancer Research Center, Seattle, WA, USA Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, WA, USA
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Borst EM, Kleine-Albers J, Gabaev I, Babić M, Wagner K, Binz A, Degenhardt I, Kalesse M, Jonjić S, Bauerfeind R, Messerle M. The human cytomegalovirus UL51 protein is essential for viral genome cleavage-packaging and interacts with the terminase subunits pUL56 and pUL89. J Virol 2013; 87:1720-32. [PMID: 23175377 PMCID: PMC3554196 DOI: 10.1128/jvi.01955-12] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 11/16/2012] [Indexed: 01/19/2023] Open
Abstract
Cleavage of human cytomegalovirus (HCMV) genomes as well as their packaging into capsids is an enzymatic process mediated by viral proteins and therefore a promising target for antiviral therapy. The HCMV proteins pUL56 and pUL89 form the terminase and play a central role in cleavage-packaging, but several additional viral proteins, including pUL51, had been suggested to contribute to this process, although they remain largely uncharacterized. To study the function of pUL51 in infected cells, we constructed HCMV mutants encoding epitope-tagged versions of pUL51 and used a conditionally replicating virus (HCMV-UL51-ddFKBP), in which pUL51 levels could be regulated by a synthetic ligand. In cells infected with HCMV-UL51-ddFKBP, viral DNA replication was not affected when pUL51 was knocked down. However, no unit-length genomes and no DNA-filled C capsids were found, indicating that cleavage of concatemeric HCMV DNA and genome packaging into capsids did not occur in the absence of pUL51. pUL51 was expressed mainly with late kinetics and was targeted to nuclear replication compartments, where it colocalized with pUL56 and pUL89. Upon pUL51 knockdown, pUL56 and pUL89 were no longer detectable in replication compartments, suggesting that pUL51 is needed for their correct subnuclear localization. Moreover, pUL51 was found in a complex with the terminase subunits pUL56 and pUL89. Our data provide evidence that pUL51 is crucial for HCMV genome cleavage-packaging and may represent a third component of the viral terminase complex. Interference with the interactions between the terminase subunits by antiviral drugs could be a strategy to disrupt the HCMV replication cycle.
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Affiliation(s)
| | | | | | - Marina Babić
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
| | | | | | - Inga Degenhardt
- Institute of Organic Chemistry, Leibniz University Hannover, Hannover, Germany, and Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Markus Kalesse
- Institute of Organic Chemistry, Leibniz University Hannover, Hannover, Germany, and Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Stipan Jonjić
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
| | - Rudolf Bauerfeind
- Institute for Cell Biology, Hannover Medical School, Hannover, Germany
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Abstract
Cytomegalovirus (CMV) infection is common worldwide, but the majority are asymptomatic. However, during initial infection or reactivation, CMV can cause tissue-invasive end-organ damage including in the gastrointestinal tract, especially in immunocompromised individuals. Gastrointestinal CMV disease can present with myriad of symptoms and be highly variable endoscopically. In this article we review the manifestations of CMV infection within the luminal gastrointestinal tract and discuss the options for diagnosis and management.
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Affiliation(s)
- David M You
- Department of Gastroenterology, Naval Medical Center, San Diego, CA 92134, USA.
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Abstract
Herpes simplex virus (HSV) encodes seven proteins necessary for viral DNA synthesis-UL9 (origin-binding protein), ICP8 (single-strand DNA [ssDNA]-binding protein), UL30/UL42 (polymerase), and UL5/UL8/UL52 (helicase/primase). It is our intention to provide an up-to-date analysis of our understanding of the structures of these replication proteins and how they function during HSV replication. The potential roles of host repair and recombination proteins will also be discussed.
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Affiliation(s)
- Sandra K Weller
- Department of Molecular, Microbial and Structural Biology, University of Connecticut Health Center, Farmington, Connecticut 06030-3205, USA.
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