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Marandino A, Tomás G, Panzera Y, Leizagoyen C, Pérez R, Bassetti L, Negro R, Rodríguez S, Pérez R. Spreading of the High-Pathogenicity Avian Influenza (H5N1) Virus of Clade 2.3.4.4b into Uruguay. Viruses 2023; 15:1906. [PMID: 37766312 PMCID: PMC10536905 DOI: 10.3390/v15091906] [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: 08/17/2023] [Revised: 08/30/2023] [Accepted: 09/01/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND Avian influenza viruses (genus Alphainfluenzavirus, family Orthomyxoviridae) infect avian and mammal hosts. In 2022, the high pathogenicity avian influenza virus (H5N1) spread to South America, resulting in the loss of thousands of wild birds, including endangered species, and severely impacting the global poultry industry. OBJECTIVES We analyzed the complete genomes of influenza viruses obtained from wild birds and backyard poultry in Uruguay between February and May 2023. METHODS Twelve complete genomes were obtained in 2023 from cloacal swabs using Illumina sequencing. Genomes were phylogenetically analyzed with regional and global strains. FINDINGS The identified strains have multiple basic amino acids at the hemagglutinin cleavage sites, which is typical for highly pathogenic strains. The Uruguayan viruses belonged to hemagglutinin clade 2.3.4.4b of the H5N1 subtype. A reassortment in North America has resulted in some segments of South American strains being of Eurasian or North American origins. The Uruguayan viruses shared a common ancestor with South American strains from Argentina and Chile. The influenza viruses displayed a spatiotemporal divergence pattern rather than being host-specific. MAIN CONCLUSIONS The arrival of the 2.3.4.4b clade in Uruguay may have been mediated by birds that acquired the virus from Argentine and Chilean waterfowl migrating in the Pacific Flyway.
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Affiliation(s)
- Ana Marandino
- Sección Genética Evolutiva, Departamento de Biología Animal, Instituto de Biología, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay; (A.M.); (G.T.); (Y.P.)
| | - Gonzalo Tomás
- Sección Genética Evolutiva, Departamento de Biología Animal, Instituto de Biología, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay; (A.M.); (G.T.); (Y.P.)
| | - Yanina Panzera
- Sección Genética Evolutiva, Departamento de Biología Animal, Instituto de Biología, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay; (A.M.); (G.T.); (Y.P.)
| | - Carmen Leizagoyen
- Dirección Nacional de Biodiversidad y Servicios Ecosistémicos (DINABISE), Ministerio de Ambiente, Juncal 1385, Montevideo 11100, Uruguay;
| | - Ramiro Pérez
- Departamento de Virología, División de Laboratorios Veterinarios “Miguel C. Rubino”, Dirección General de Servicios Ganaderos, Ministerio de Ganadería, Agricultura y Pesca, Ruta 8 “Brigadier Gral. Juan A. Lavalleja” Km 17,000, Montevideo 12100, Uruguay; (R.P.); (L.B.); (R.N.)
| | - Lucía Bassetti
- Departamento de Virología, División de Laboratorios Veterinarios “Miguel C. Rubino”, Dirección General de Servicios Ganaderos, Ministerio de Ganadería, Agricultura y Pesca, Ruta 8 “Brigadier Gral. Juan A. Lavalleja” Km 17,000, Montevideo 12100, Uruguay; (R.P.); (L.B.); (R.N.)
| | - Raúl Negro
- Departamento de Virología, División de Laboratorios Veterinarios “Miguel C. Rubino”, Dirección General de Servicios Ganaderos, Ministerio de Ganadería, Agricultura y Pesca, Ruta 8 “Brigadier Gral. Juan A. Lavalleja” Km 17,000, Montevideo 12100, Uruguay; (R.P.); (L.B.); (R.N.)
| | - Sirley Rodríguez
- Departamento de Virología, División de Laboratorios Veterinarios “Miguel C. Rubino”, Dirección General de Servicios Ganaderos, Ministerio de Ganadería, Agricultura y Pesca, Ruta 8 “Brigadier Gral. Juan A. Lavalleja” Km 17,000, Montevideo 12100, Uruguay; (R.P.); (L.B.); (R.N.)
| | - Ruben Pérez
- Sección Genética Evolutiva, Departamento de Biología Animal, Instituto de Biología, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, Uruguay; (A.M.); (G.T.); (Y.P.)
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Stampolaki Μ, Hoffmann A, Tekwani K, Georgiou K, Tzitzoglaki C, Ma C, Becker S, Schmerer P, Döring K, Stylianakis I, Turcu AL, Wang J, Vázquez S, Andreas LB, Schmidtke M, Kolocouris A. A Study of the Activity of Adamantyl Amines against Mutant Influenza A M2 Channels Identified a Polycyclic Cage Amine Triple Blocker, Explored by Molecular Dynamics Simulations and Solid-State NMR. ChemMedChem 2023; 18:e202300182. [PMID: 37377066 DOI: 10.1002/cmdc.202300182] [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: 04/03/2023] [Revised: 06/25/2023] [Accepted: 06/26/2023] [Indexed: 06/29/2023]
Abstract
We compared the anti-influenza potencies of 57 adamantyl amines and analogs against influenza A virus with serine-31 M2 proton channel, usually termed as WT M2 channel, which is amantadine sensitive. We also tested a subset of these compounds against viruses with the amantadine-resistant L26F, V27A, A30T, G34E M2 mutant channels. Four compounds inhibited WT M2 virus in vitro with mid-nanomolar potency, with 27 compounds showing sub-micromolar to low micromolar potency. Several compounds inhibited L26F M2 virus in vitro with sub-micromolar to low micromolar potency, but only three compounds blocked L26F M2-mediated proton current as determined by electrophysiology (EP). One compound was found to be a triple blocker of WT, L26F, V27A M2 channels by EP assays, but did not inhibit V27A M2 virus in vitro, and one compound inhibited WT, L26F, V27A M2 in vitro without blocking V27A M2 channel. One compound blocked only L26F M2 channel by EP, but did not inhibit virus replication. The triple blocker compound is as long as rimantadine, but could bind and block V27A M2 channel due to its larger girth as revealed by molecular dynamics simulations, while MAS NMR informed on the interaction of the compound with M2(18-60) WT or L26F or V27A.
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Affiliation(s)
- Μarianna Stampolaki
- Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis-Zografou, 15771, Athens, Greece
- Department of NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, Germany
| | - Anja Hoffmann
- Department of Medical Microbiology, Jena University Hospital, CMB Building, R. 443, Hans Knoell Str. 2, 07745, Jena (Germany), Germany
| | - Kumar Tekwani
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Kyriakos Georgiou
- Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis-Zografou, 15771, Athens, Greece
| | - Christina Tzitzoglaki
- Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis-Zografou, 15771, Athens, Greece
| | - Chunlong Ma
- Department of Medicinal Chemistry, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854-8020, USA
| | - Stefan Becker
- Department of NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, Germany
| | - Patrick Schmerer
- Department of Medical Microbiology, Jena University Hospital, CMB Building, R. 443, Hans Knoell Str. 2, 07745, Jena (Germany), Germany
| | - Kristin Döring
- Department of Medical Microbiology, Jena University Hospital, CMB Building, R. 443, Hans Knoell Str. 2, 07745, Jena (Germany), Germany
| | - Ioannis Stylianakis
- Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis-Zografou, 15771, Athens, Greece
| | - Andreea L Turcu
- Facultat de Farmàcia i Ciències de l'Alimentació, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, Barcelona, 08028, Spain
| | - Jun Wang
- Department of Medicinal Chemistry, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854-8020, USA
| | - Santiago Vázquez
- Facultat de Farmàcia i Ciències de l'Alimentació, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, Barcelona, 08028, Spain
| | - Loren B Andreas
- Department of NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, Germany
| | - Michaela Schmidtke
- Department of Medical Microbiology, Jena University Hospital, CMB Building, R. 443, Hans Knoell Str. 2, 07745, Jena (Germany), Germany
| | - Antonios Kolocouris
- Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis-Zografou, 15771, Athens, Greece
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Oriola AO, Oyedeji AO. Essential Oils and Their Compounds as Potential Anti-Influenza Agents. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227797. [PMID: 36431899 PMCID: PMC9693178 DOI: 10.3390/molecules27227797] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022]
Abstract
Essential oils (EOs) are chemical substances, mostly produced by aromatic plants in response to stress, that have a history of medicinal use for many diseases. In the last few decades, EOs have continued to gain more attention because of their proven therapeutic applications against the flu and other infectious diseases. Influenza (flu) is an infectious zoonotic disease that affects the lungs and their associated organs. It is a public health problem with a huge health burden, causing a seasonal outbreak every year. Occasionally, it comes as a disease pandemic with unprecedentedly high hospitalization and mortality. Currently, influenza is managed by vaccination and antiviral drugs such as Amantadine, Rimantadine, Oseltamivir, Peramivir, Zanamivir, and Baloxavir. However, the adverse side effects of these drugs, the rapid and unlimited variabilities of influenza viruses, and the emerging resistance of new virus strains to the currently used vaccines and drugs have necessitated the need to obtain more effective anti-influenza agents. In this review, essential oils are discussed in terms of their chemistry, ethnomedicinal values against flu-related illnesses, biological potential as anti-influenza agents, and mechanisms of action. In addition, the structure-activity relationships of lead anti-influenza EO compounds are also examined. This is all to identify leading agents that can be optimized as drug candidates for the management of influenza. Eucalyptol, germacrone, caryophyllene derivatives, eugenol, terpin-4-ol, bisabolene derivatives, and camphecene are among the promising EO compounds identified, based on their reported anti-influenza activities and plausible molecular actions, while nanotechnology may be a new strategy to achieve the efficient delivery of these therapeutically active EOs to the active virus site.
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Zarubaev VV, Garshinina AV, Volobueva AS, Slita AV, Yarovaya OI, Bykov VV, Leonov KA, Motov VS, Khazanov VA, Salakhutdinov NF. Optimization of application schedule of camphecene, a novel anti-influenza compound, based on its pharmacokinetic characteristics. Fundam Clin Pharmacol 2022; 36:518-525. [PMID: 34984730 DOI: 10.1111/fcp.12750] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/14/2021] [Accepted: 12/30/2021] [Indexed: 12/20/2022]
Abstract
Due to high variability and rapid life cycle, influenza virus is able to develop drug resistance against direct-acting antivirals. Development of novel virus-in113039hibiting drugs is therefore important goal. Previously, we identified camphor derivative, camphecene, as an effective anti-influenza compound. In the present study, we optimize the regimen of its application to avoid high sub-toxic concentrations. The protective activity of camphecene was assessed on the model of lethal pneumonia of mice caused by influenza viruses. Camphecene was administered either once a day or four times a day, alone or in combination with Tamiflu. Mortality and viral titer in the lungs were studied. Pharmacokinetics of camphecene was studied in rabbits. We have demonstrated that camphecene, being used every 6 h at a dose of 7.5 mg/kg/day, results in antiviral effect that was statistically equal to the effect of 100 mg/kg/day once a day, that is, the same effect was achieved by 13 times lower daily dose of the drug. This effect was manifested in decrease of mortality and decrease of virus' titer in the lungs. The studies of pharmacokinetics of camphecene have demonstrated that it does not accumulate in blood plasma and that its m ultiple applications with dosage interval of 65 min are safe. In addition, the results of the study demonstrate also that camphecene possesses additive effect with Tamiflu, allowing to decrease the dose of the latter. The results suggest that due to safety and efficacy, camphecene can be further developed as potential anti-influenza remedy.
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Affiliation(s)
- Vladimir V Zarubaev
- Pasteur Institute of Epidemiology and Microbiology, Saint Petersburg, Russia
| | | | | | - Alexander V Slita
- Pasteur Institute of Epidemiology and Microbiology, Saint Petersburg, Russia
| | - Olga I Yarovaya
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Vladimir V Bykov
- Limited Liability Company "Innovative Pharmacology Research" (IPHAR LLC), Tomsk, Russia
| | - Klim A Leonov
- Limited Liability Company "Innovative Pharmacology Research" (IPHAR LLC), Tomsk, Russia
| | - Valery S Motov
- Limited Liability Company "Innovative Pharmacology Research" (IPHAR LLC), Tomsk, Russia
| | - Veniamin A Khazanov
- Limited Liability Company "Innovative Pharmacology Research" (IPHAR LLC), Tomsk, Russia
| | - Nariman F Salakhutdinov
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
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Novel O-acylated amidoximes and substituted 1,2,4-oxadiazoles synthesised from (+)-ketopinic acid possessing potent virus-inhibiting activity against phylogenetically distinct influenza A viruses. Bioorg Med Chem Lett 2022; 55:128465. [PMID: 34808389 DOI: 10.1016/j.bmcl.2021.128465] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/02/2021] [Accepted: 11/12/2021] [Indexed: 11/02/2022]
Abstract
This article describes the synthesis and antiviral activity evaluation of new substituted 1,2,4-oxadiazoles containing a bicyclic substituent at position 5 of the heterocycle and O-acylated amidoximes as precursors for their synthesis. New compounds were obtained from the (+)-camphor derivative (+)-ketopinic acid. The chemical library was tested in vitro for cytotoxicity against the MDCK cell line and for antiviral activity against influenza viruses of H1N1 and H7N9 subtypes. The synthesised compounds exhibited high virus-inhibiting activity against the H1N1 influenza virus. Some synthesised compounds were also active against the influenza virus of a different antigenic subtype: H7N9. The mechanism of the virus-inhibiting activity of these compounds is based on their interference with the fusion activity of viral hemagglutinin (HA). No interference with the receptor-binding activity of HA has been demonstrated. According to molecular docking results, the selective antiviral activity of O-acylated amidoximes and 1,2,4-oxadiazoles is associated with their structural features. O-Acylated amidoximes are likely more complementary to the binding site located at the site of the fusion peptide, and 1,2,4-oxadiazoles are more complimentary to the site located at the site of proteolysis. Significant differences in the amino acid residues of the binding sites of HA's of different types allow us to explain the selective antiviral activity of the compounds under study.
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Amantadine has potential for the treatment of COVID-19 because it inhibits known and novel ion channels encoded by SARS-CoV-2. Commun Biol 2021; 4:1347. [PMID: 34853399 PMCID: PMC8636635 DOI: 10.1038/s42003-021-02866-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 11/02/2021] [Indexed: 12/16/2022] Open
Abstract
The dire need for COVID-19 treatments has inspired strategies of repurposing approved drugs. Amantadine has been suggested as a candidate, and cellular as well as clinical studies have indicated beneficial effects of this drug. We demonstrate that amantadine and hexamethylene-amiloride (HMA), but not rimantadine, block the ion channel activity of Protein E from SARS-CoV-2, a conserved viroporin among coronaviruses. These findings agree with their binding to Protein E as evaluated by solution NMR and molecular dynamics simulations. Moreover, we identify two novel viroporins of SARS-CoV-2; ORF7b and ORF10, by showing ion channel activity in a X. laevis oocyte expression system. Notably, amantadine also blocks the ion channel activity of ORF10, thereby providing two ion channel targets in SARS-CoV-2 for amantadine treatment in COVID-19 patients. A screen of known viroporin inhibitors on Protein E, ORF7b, ORF10 and Protein 3a from SARS-CoV-2 revealed inhibition of Protein E and ORF7b by emodin and xanthene, the latter also blocking Protein 3a. This illustrates a general potential of well-known ion channel blockers against SARS-CoV-2 and specifically a dual molecular basis for the promising effects of amantadine in COVID-19 treatment. Toft-Bertelsen et al. describe repurposing of anti-influenza drug amantadine and its derivatives for the treatment of SARS-CoV-2. They show that Amantadine, Emodin and Xanthene show significant blockage of ionchannels formed by SARS-CoV-2 which are crucial for its assembly and pathophysiology.
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Discovery of New Ginsenol-Like Compounds with High Antiviral Activity. Molecules 2021; 26:molecules26226794. [PMID: 34833886 PMCID: PMC8619001 DOI: 10.3390/molecules26226794] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/02/2021] [Accepted: 11/06/2021] [Indexed: 11/20/2022] Open
Abstract
A number of framework amides with a ginsenol backbone have been synthesized using the Ritter reaction. We named the acetamide as Ginsamide. A method was developed for the synthesis of the corresponding amine and thioacetamide. The new compounds revealed a high activity against H1N1 influenza, which was confirmed using an animal model. Biological experiments were performed to determine the mechanism of action of the new agents, a ginsamide-resistant strain of influenza virus was obtained, and the pathogenicity of the resistant strain and the control strain was studied. It was shown that the emergence of resistance to Ginsamide was accompanied by a reduction in the pathogenicity of the influenza virus.
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Mehrbod P, Safari H, Mollai Z, Fotouhi F, Mirfakhraei Y, Entezari H, Goodarzi S, Tofighi Z. Potential antiviral effects of some native Iranian medicinal plants extracts and fractions against influenza A virus. BMC Complement Med Ther 2021; 21:246. [PMID: 34598697 PMCID: PMC8485427 DOI: 10.1186/s12906-021-03423-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 09/24/2021] [Indexed: 01/11/2023] Open
Abstract
Background Influenza A virus (IAV) infection is a continual threat to the health of animals and humans globally. Consumption of the conventional drugs has shown several side effects and drug resistance. This study was aimed to screen some Iranian medicinal plants extracts and their fractions against influenza A virus. Methods Glycyrrhiza glabra (rhizome), Myrtus commonis (leaves), Melissa officinalis (leaves), Hypericum perforatum (aerial parts), Tilia platyphyllos (flower), Salix alba (bark), and Camellia sinensis (green and fermented leaves) were extracted with 80% methanol and fractionated with chloroform and methanol, respectively. The cytotoxicity of the compounds were determined by MTT colorimetric assay on MDCK cells. The effective concentrations (EC50) of the compounds were calculated from the MTT results compared to the negative control with no significant effects on cell viability. The effects of EC50 of the compounds on viral surface glycoproteins and viral titer were tested by HI and HA virological assays, respectively and compared with oseltamivir and amantadine. Preliminary phytochemical analysis were done for promising anti-IAV extracts and fractions. Results The most effective samples against IAV titer (P ≤ 0.05) were crude extracts of G. glabra, M. officinalis and S. alba; methanol fractions of M. communis and M. officinalis; and chloroform fractions of M. communis and C. sinensis (fermented) mostly in co- and pre-penetration combined treatments. The potential extracts and fractions were rich in flavonoids, tannins, steroids and triterpenoids. Conclusion The outcomes confirmed a scientific basis for anti-influenza A virus capacity of the extracts and fractions from the selected plants for the first time, and correlated their effects with their phytochemical constituents. It is worth focusing on elucidating pure compounds and identifying their mechanism(s) of action. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-021-03423-x.
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Affiliation(s)
- Parvaneh Mehrbod
- Influenza and Respiratory Viruses Department, Pasteur Institute of IRAN, Tehran, Iran
| | - Hanieh Safari
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Zeinab Mollai
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Fotouhi
- Influenza and Respiratory Viruses Department, Pasteur Institute of IRAN, Tehran, Iran
| | - Yasaman Mirfakhraei
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Hanieh Entezari
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Saied Goodarzi
- Medicinal Plants Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
| | - Zahra Tofighi
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran. .,Medicinal Plants Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
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Pereira AKDS, Santos IA, da Silva WW, Nogueira FAR, Bergamini FRG, Jardim ACG, Corbi PP. Memantine hydrochloride: a drug to be repurposed against Chikungunya virus? Pharmacol Rep 2021; 73:954-961. [PMID: 33523405 PMCID: PMC7848042 DOI: 10.1007/s43440-021-00216-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/30/2020] [Accepted: 01/05/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Chikungunya fever is an endemic disease caused by the Chikungunya virus (CHIKV) to which there is no vaccine or effective antiviral drug treatment so far. Our study aimed to evaluate the potential anti-CHIKV activity of memantine hydrochloride (mtnH), a drug from the class of the aminoadamantanes approved for the treatment of Alzheimer´s disease, as a possible drug to be repurposed to the treatment of Chikungunya fever. METHODS MtnH antiviral activity against CHIKV was determined by infecting BHK-21 cells with CHIKV-nanoluc, a virus carrying the marker nanoluciferase reporter, in the presence or absence of mtnH at concentrations ranging from 500 to 1.45 µM. The effective concentration of 50% inhibition (EC50) was calculated. Cell viability assay (determination of CC50) was also performed employing BHK-21 cells. Mutagenic assays were performed by the Salmonella Typhimurium/microsome assay (Ames test). RESULTS MtnH presented a CC50 of 248.4 ± 31.9 µM and an EC50 of 32.4 ± 4 µM against CHIKV in vitro. The calculated selectivity index (SI) was 7.67. MtnH did not induce genetic mutation in Salmonella strains with or without an external metabolizing system. CONCLUSION With the data herein presented, it is possible to hypothesize mtnH as a viable candidate to be repurposed as an anti-CHIKV drug. Clinical assays are, therefore, encouraged due to the promising in vitro results. The drug memantine hydrochloride is herein personified with a doubt: as a prior regulated drug against Alzheimer, could it follow the path against Chikungunya virus too?
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Affiliation(s)
| | - Igor A Santos
- Laboratory of Virology, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, 38405-302, Brazil
| | - Washington W da Silva
- Department of Biological and Health Sciences, University of Araraquara-UNIARA, Araraquara, SP, Brazil
| | - Flávia A Resende Nogueira
- Department of Biological and Health Sciences, University of Araraquara-UNIARA, Araraquara, SP, Brazil
| | - Fernando R G Bergamini
- Laboratory of Synthesis of Bioinspired Molecules, Institute of Chemistry, Federal University of Uberlândia, Uberlândia, MG, 34000-902, Brazil.
| | - Ana Carolina G Jardim
- Laboratory of Virology, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, MG, 38405-302, Brazil.
| | - Pedro P Corbi
- Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP, 13083-871, Brazil.
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Tzitzoglaki C, McGuire K, Lagarias P, Konstantinidi A, Hoffmann A, Fokina NA, Ma C, Papanastasiou IP, Schreiner PR, Vázquez S, Schmidtke M, Wang J, Busath DD, Kolocouris A. Chemical Probes for Blocking of Influenza A M2 Wild-type and S31N Channels. ACS Chem Biol 2020; 15:2331-2337. [PMID: 32786258 DOI: 10.1021/acschembio.0c00553] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We report on using the synthetic aminoadamantane-CH2-aryl derivatives 1-6 as sensitive probes for blocking M2 S31N and influenza A virus (IAV) M2 wild-type (WT) channels as well as virus replication in cell culture. The binding kinetics measured using electrophysiology (EP) for M2 S31N channel are very dependent on the length between the adamantane moiety and the first ring of the aryl headgroup realized in 2 and 3 and the girth and length of the adamantane adduct realized in 4 and 5. Study of 1-6 shows that, according to molecular dynamics (MD) simulations and molecular mechanics Poisson-Boltzmann surface area (MM/PBSA) calculations, all bind in the M2 S31N channel with the adamantyl group positioned between V27 and G34 and the aryl group projecting out of the channel with the phenyl (or isoxazole in 6) embedded in the V27 cluster. In this outward binding configuration, an elongation of the ligand by only one methylene in rimantadine 2 or using diamantane or triamantane instead of adamantane in 4 and 5, respectively, causes incomplete entry and facilitates exit, abolishing effective block compared to the amantadine derivatives 1 and 6. In the active M2 S31N blockers 1 and 6, the phenyl and isoxazolyl head groups achieve a deeper binding position and high kon/low koff and high kon/high koff rate constants, compared to inactive 2-5, which have much lower kon and higher koff. Compounds 1-5 block the M2 WT channel by binding in the longer area from V27-H37, in the inward orientation, with high kon and low koff rate constants. Infection of cell cultures by influenza virus containing M2 WT or M2 S31N is inhibited by 1-5 or 1-4 and 6, respectively. While 1 and 6 block infection through the M2 block mechanism in the S31N variant, 2-4 may block M2 S31N virus replication in cell culture through the lysosomotropic effect, just as chloroquine is thought to inhibit SARS-CoV-2 infection.
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Affiliation(s)
- Christina Tzitzoglaki
- Section of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupolis-Zografou, Athens 15771, Greece
| | - Kelly McGuire
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, Utah 84602, United States
| | - Panagiotis Lagarias
- Section of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupolis-Zografou, Athens 15771, Greece
| | - Athina Konstantinidi
- Section of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupolis-Zografou, Athens 15771, Greece
| | - Anja Hoffmann
- Jena University Hospital, Department of Medical Microbiology, Section Experimental Virology, Hans Knoell Str. 2, D-07745 Jena, Germany
| | - Natalie A. Fokina
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Chulong Ma
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Ioannis P. Papanastasiou
- Section of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupolis-Zografou, Athens 15771, Greece
| | - Peter R. Schreiner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Santiago Vázquez
- Laboratori de Quı́mica Farmacèutica (Unitat Associada al CSIC), Departament de Farmacologia, Toxicologia i Quı́mica Terapèutica, Facultat de Farmàcia i Ciències de l’Alimentació, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, Barcelona 08028, Spain
| | - Michaela Schmidtke
- Jena University Hospital, Department of Medical Microbiology, Section Experimental Virology, Hans Knoell Str. 2, D-07745 Jena, Germany
| | - Jun Wang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - David D. Busath
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, Utah 84602, United States
| | - Antonios Kolocouris
- Section of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupolis-Zografou, Athens 15771, Greece
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12
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Jalily PH, Duncan MC, Fedida D, Wang J, Tietjen I. Put a cork in it: Plugging the M2 viral ion channel to sink influenza. Antiviral Res 2020; 178:104780. [PMID: 32229237 PMCID: PMC7102647 DOI: 10.1016/j.antiviral.2020.104780] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 02/12/2020] [Accepted: 03/20/2020] [Indexed: 12/17/2022]
Abstract
The ongoing threat of seasonal and pandemic influenza to human health requires antivirals that can effectively supplement existing vaccination strategies. The M2 protein of influenza A virus (IAV) is a proton-gated, proton-selective ion channel that is required for virus replication and is an established antiviral target. While licensed adamantane-based M2 antivirals have been historically used, M2 mutations that confer major adamantane resistance are now so prevalent in circulating virus strains that these drugs are no longer recommended. Here we review the current understanding of IAV M2 structure and function, mechanisms of inhibition, the rise of drug resistance mutations, and ongoing efforts to develop new antivirals that target resistant forms of M2.
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Affiliation(s)
- Pouria H Jalily
- Department of Anesthesiology, Pharmacology, and Therapeutics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Maggie C Duncan
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - David Fedida
- Department of Anesthesiology, Pharmacology, and Therapeutics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Jun Wang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tuscon, AZ, USA
| | - Ian Tietjen
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada; The Wistar Institute, Philadelphia, PA, USA.
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13
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Pereira AKDS, Manzano CM, Nakahata DH, Clavijo JCT, Pereira DH, Lustri WR, Corbi PP. Synthesis, crystal structures, DFT studies, antibacterial assays and interaction assessments with biomolecules of new platinum(ii) complexes with adamantane derivatives. NEW J CHEM 2020. [DOI: 10.1039/d0nj02009e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Synthesis, crystal structures and antibacterial activities of new Pt(ii) complexes with adamantane derivatives are presented in this article.
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Affiliation(s)
| | | | | | | | | | - Wilton Rogério Lustri
- Department of Biological and Health Sciences
- University of Araraquara
- UNIARA
- São Paulo
- Brazil
| | - Pedro Paulo Corbi
- Institute of Chemistry
- University of Campinas – UNICAMP
- 13083-970 Campinas
- Brazil
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14
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Song Y, Zhang Y, Chen L, Zhang B, Zhang M, Wang J, Jiang Y, Yang C, Jiang T. Genetic Characteristics and Pathogenicity Analysis in Chickens and Mice of Three H9N2 Avian Influenza Viruses. Viruses 2019; 11:v11121127. [PMID: 31817585 PMCID: PMC6950319 DOI: 10.3390/v11121127] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 11/29/2019] [Accepted: 12/04/2019] [Indexed: 11/25/2022] Open
Abstract
H9N2 avian influenza is a remarkable disease that has circulated in domestic poultry in large regions of China and posed a serious threat to the poultry industry. The H9N2 virus can not only infect mammals directly, but also provide gene segments to generate novel, but lethal human reassortants. Therefore, it is important to study the evolution, pathogenicity, and transmission of the H9N2 virus. In this study, three H9N2 viruses isolated from chickens in different layer farms were identified. Phylogenetic analysis revealed that these H9N2 viruses were all multiple genotype reassortants, with genes originating from Y280-like, F/98-like, and G1-like viruses. Animal studies indicated that the AV1535 and AV1548 viruses replicated efficiently in the lungs, tracheas, spleens, kidneys, and brains of chickens; the viruses shed for at least 11 days post-inoculation (DPI) and were transmitted efficiently among contact chickens. The AV1534 virus replicated poorly in chickens, shed for 7 DPI, and were not transmitted efficiently among contact chickens. The AV1534 virus replicated well in mice lungs and caused about 2% weight loss. The AV1535 and AV1548 viruses were not able to replicate in the lungs of mice. Our results indicate that we should pay attention to H9N2 avian influenza virus surveillance in poultry and changes in the pathogenicity of them to mammals.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Taozhen Jiang
- Correspondence: ; Tel.: +86-010-61203518; Fax: +86-010-61255380
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15
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dos Santos Pereira AK, Nakahata DH, Manzano CM, de Alencar Simoni D, Pereira DH, Lustri WR, Formiga ALB, Corbi PP. Synthesis, crystallographic studies, molecular modeling and in vitro biological studies of silver(I) complexes with aminoadamantane ligands. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.114116] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Optimization of the Production Technology of Oxidized Cyclodextrin Bisulfite. Processes (Basel) 2019. [DOI: 10.3390/pr7070426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences has developed an original active pharmaceutical ingredient based on an oxidized cyclodextrin oligosaccharide, which is a bisulfite derivative. Conducted pharmacological studies proved its antiviral activity in vitro and in vivo experiments against the influenza A (H1N1) virus. The aim of this work was to optimize the technology of obtaining the active pharmaceutical ingredient based on the bisulfite derivative of oxidized cyclodextrin to increase the efficiency and safety of the process. For this, a scaled method of oligosaccharide oxidation was tested on pilot plants in accordance with the requirements of green chemistry. As a result, the reaction time was reduced from three to five days (laboratory conditions) to 1.5 h, and the safety and environmental friendliness of process was ensured. The use of cross-flow filtration and the method of freeze-drying eliminated 96% of ethyl alcohol, reduced the laboriousness and energy consumption of the technological operations for purification and isolation of the final product, and also increased the productivity of the whole process (output increased to 98%). The results are confirmed by data obtained by physicochemical methods.
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17
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Diels-Alder adducts of 3-N-substituted derivatives of (−)-Cytisine as influenza A/H1N1 virus inhibitors; stereodifferentiation of antiviral properties and preliminary assessment of action mechanism. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Galochkina AV, Bollikanda RK, Zarubaev VV, Tentler DG, Lavrenteva IN, Slita AV, Chirra N, Kantevari S. Synthesis of novel derivatives of 7,8-dihydro-6H-imidazo[2,1-b][1,3]benzothiazol-5-one and their virus-inhibiting activity against influenza A virus. Arch Pharm (Weinheim) 2018; 352:e1800225. [PMID: 30520524 DOI: 10.1002/ardp.201800225] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/21/2018] [Accepted: 11/04/2018] [Indexed: 12/30/2022]
Abstract
Influenza remains a highly pathogenic and hardly controlled human infection. The ability of selecting drug-resistant variants necessitates the search and development of novel anti-influenza drugs. Herein, we describe the synthesis and evaluation of a series of novel 2-substituted 7,8-dihydro-6H-imidazo[2,1-b][1,3]benzothiazol-5-ones 3a-k for their virus-inhibiting activity against influenza A virus. The new analogues 3a-k prepared in two steps from commercially available cyclohexane-1,3-diones were fully characterized by their NMR and mass spectral data. Among the new derivatives screened for cytotoxicity and in vitro antiviral activity against influenza virus A/Puerto Rico/8/34 (H1N1) in MDCK cells, three analogues 3i-k containing a thiophene unit were found to exhibit high virus-inhibiting activity (high SI values) and a favorable toxicity profile. The compound 3j (CC50 : >1000 μM, SI = 77) with higher potency is the best anti-influenza hit analogue for further structural optimization and drug development. The most active compounds did not inhibit viral neuraminidase and possess therefore other targets and mechanisms of activity than the currently used neuraminidase inhibitors.
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Affiliation(s)
| | - Rakesh K Bollikanda
- Fluoro and Agrochemicals Division (Organic Chemistry Division-II), CSIR - Indian Institute of Chemical Technology, Hyderabad, India.,Academy of Scientific and Innovative Research, CSIR - Indian Institute of Chemical Technology, Hyderabad, India
| | | | | | - Irina N Lavrenteva
- Pasteur Institute of Epidemiology and Microbiology, St. Petersburg, Russia
| | - Alexander V Slita
- Pasteur Institute of Epidemiology and Microbiology, St. Petersburg, Russia
| | - Nagaraju Chirra
- Fluoro and Agrochemicals Division (Organic Chemistry Division-II), CSIR - Indian Institute of Chemical Technology, Hyderabad, India.,Academy of Scientific and Innovative Research, CSIR - Indian Institute of Chemical Technology, Hyderabad, India
| | - Srinivas Kantevari
- Fluoro and Agrochemicals Division (Organic Chemistry Division-II), CSIR - Indian Institute of Chemical Technology, Hyderabad, India.,Academy of Scientific and Innovative Research, CSIR - Indian Institute of Chemical Technology, Hyderabad, India
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19
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Zarubaev VV, Pushkina EA, Borisevich SS, Galochkina AV, Garshinina AV, Shtro AA, Egorova AA, Sokolova AS, Khursan SL, Yarovaya OI, Salakhutdinov NF. Selection of influenza virus resistant to the novel camphor-based antiviral camphecene results in loss of pathogenicity. Virology 2018; 524:69-77. [DOI: 10.1016/j.virol.2018.08.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 08/08/2018] [Accepted: 08/14/2018] [Indexed: 12/21/2022]
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20
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Rogachev AD, Yarovaya OI, Fatianova AV, Lavrinenko VA, Amosov EV, Zarubaev VV, Pokrovsky AG, Salakhutdinov NF. Untargeted search and identification of metabolites of antiviral agent camphecene in rat urine by liquid chromatography and mass spectrometry and studying their distribution in organs following peroral administration of the compound. J Pharm Biomed Anal 2018; 161:383-392. [DOI: 10.1016/j.jpba.2018.09.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 09/01/2018] [Indexed: 01/23/2023]
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21
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Hossan MS, Fatima A, Rahmatullah M, Khoo TJ, Nissapatorn V, Galochkina AV, Slita AV, Shtro AA, Nikolaeva Y, Zarubaev VV, Wiart C. Antiviral activity of Embelia ribes Burm. f. against influenza virus in vitro. Arch Virol 2018; 163:2121-2131. [PMID: 29633078 DOI: 10.1007/s00705-018-3842-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 03/31/2018] [Indexed: 11/28/2022]
Abstract
Viral respiratory infections are raising serious concern globally. Asian medicinal plants could be useful in improving the current treatment strategies for influenza. The present study examines the activity of five plants from Bangladesh against influenza virus. MDCK cells infected with influenza virus A/Puerto Rico/8/34 (H1N1) were treated with increasing concentrations of ethyl acetate extracts, and their cytotoxicity (CC50), virus-inhibiting activity (IC50), and selectivity index (SI) were calculated. The ethyl acetate extract of fruits of Embelia ribes Burm. f. (Myrsinaceae) had the highest antiviral activity, with an IC50 of 0.2 µg/mL and a SI of 32. Its major constituent, embelin, was further isolated and tested against the same virus. Embelin demonstrated antiviral activity, with an IC50 of 0.3 µM and an SI of 10. Time-of-addition experiments revealed that embelin was most effective when added at early stages of the viral life cycle (0-1 h postinfection). Embelin was further evaluated against a panel of influenza viruses including influenza A and B viruses that were susceptible or resistant to rimantadine and oseltamivir. Among the viruses tested, avian influenza virus A/mallard/Pennsylvania/10218/84 (H5N2) was the most susceptible to embelin (SI = 31), while A/Aichi/2/68 (H3N2) virus was the most resistant (SI = 5). In silico molecular docking showed that the binding site for embelin is located in the receptor-binding domain of the viral hemagglutinin. The results of this study provide evidence that E. ribes can be used for development of a novel alternative anti-influenza plant-based agent.
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Affiliation(s)
- Md Shahadat Hossan
- School of Pharmacy, University of Nottingham, Malaysia Campus, 43500, Semenyih, Malaysia
| | - Ayesha Fatima
- Faculty of Pharmacy, Quest International University, 30250, Ipoh, Malaysia
| | - Mohammed Rahmatullah
- Department of Pharmacy, Faculty of Life Science, University of Development Alternative (UODA), Dhaka, 1207, Bangladesh
| | - Teng Jin Khoo
- School of Pharmacy, University of Nottingham, Malaysia Campus, 43500, Semenyih, Malaysia
| | - Veeranoot Nissapatorn
- School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat, 80161, Thailand
| | - Anastasia V Galochkina
- Pasteur Institute of Epidemiology and Microbiology, 14 Mira str, 197101, St. Petersburg, Russia
| | - Alexander V Slita
- Pasteur Institute of Epidemiology and Microbiology, 14 Mira str, 197101, St. Petersburg, Russia
| | - Anna A Shtro
- Influenza Research Institute, 15/17 prof. Popova str, 197376, St. Petersburg, Russia
| | - Yulia Nikolaeva
- Influenza Research Institute, 15/17 prof. Popova str, 197376, St. Petersburg, Russia
| | - Vladimir V Zarubaev
- Pasteur Institute of Epidemiology and Microbiology, 14 Mira str, 197101, St. Petersburg, Russia.
| | - Christophe Wiart
- School of Pharmacy, University of Nottingham, Malaysia Campus, 43500, Semenyih, Malaysia.
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22
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Jie Y, Zheng H, Xiaolei L, Xinhua O, Dong Y, Yingchun S, Lingzhi L, Rengui Y. Full-length genome analysis of an avian influenza A virus (H9N2) from a human infection in Changsha City. Future Virol 2018. [DOI: 10.2217/fvl-2017-0151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aim: Sequencing and phylogenetic analysis of avian influenza A (H9N2) virus strain, which was isolated from a 2-year-old child presenting influenza-like symptoms. Methods: Viral genome was acquired by RT-PCR, and phylogenetic trees were constructed using the neighbor-joining method. Results: A/Hunan/44557/2015 sequence shared identity with the RSSRGLF motif – first reported in low-pathogenic avian influenza in birds. Polymerase L336M and hemagglutinin Q226L mutation was found in the strain. Two newly mutation sites, T197D and D483N in hemagglutinin gene, were found. Phylogenetic tree analysis revealed that the eight gene segments of this virus contained three lineages. Conclusion: A/Hunan/44557/2015 may have acquired the ability to infect humans via genetic exchange with other H9N2 viruses, indicating that the H9N2 genome can generate pandemic isolates.
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Affiliation(s)
- Yuan Jie
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
| | - Huang Zheng
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
| | - Liu Xiaolei
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
| | - Ou Xinhua
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
| | - Yao Dong
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
| | - Song Yingchun
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
| | - Li Lingzhi
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
| | - Yang Rengui
- Changsha Center for Disease Control & Prevention, Changsha, Hunan, PR China
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23
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Development and Validation of a Method for Determination of a New Effective Inhibitor of Influenza Virus H1N1 in Blood Plasma. Pharm Chem J 2018. [DOI: 10.1007/s11094-018-1748-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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Carter CJ. Genetic, Transcriptome, Proteomic, and Epidemiological Evidence for Blood-Brain Barrier Disruption and Polymicrobial Brain Invasion as Determinant Factors in Alzheimer's Disease. J Alzheimers Dis Rep 2017; 1:125-157. [PMID: 30480234 PMCID: PMC6159731 DOI: 10.3233/adr-170017] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Diverse pathogens are detected in Alzheimer's disease (AD) brains. A bioinformatics survey showed that AD genome-wide association study (GWAS) genes (localized in bone marrow, immune locations and microglia) relate to multiple host/pathogen interactomes (Candida albicans, Cryptococcus neoformans, Bornavirus, Borrelia burgdorferri, cytomegalovirus, Ebola virus, HSV-1, HERV-W, HIV-1, Epstein-Barr, hepatitis C, influenza, Chlamydia pneumoniae, Porphyrymonas gingivalis, Helicobacter pylori, Toxoplasma gondii, Trypanosoma cruzi). These interactomes also relate to the AD hippocampal transcriptome and to plaque or tangle proteins. Upregulated AD hippocampal genes match those upregulated by multiple bacteria, viruses, fungi, or protozoa in immunocompetent cells. AD genes are enriched in GWAS datasets reflecting pathogen diversity, suggesting selection for pathogen resistance, as supported by the old age of AD patients, implying resistance to earlier infections. APOE4 is concentrated in regions of high parasitic burden and protects against childhood tropical infections and hepatitis C. Immune/inflammatory gain of function applies to APOE4, CR1, and TREM2 variants. AD genes are also expressed in the blood-brain barrier (BBB), which is disrupted by AD risk factors (age, alcohol, aluminum, concussion, cerebral hypoperfusion, diabetes, homocysteine, hypercholesterolemia, hypertension, obesity, pesticides, pollution, physical inactivity, sleep disruption, smoking) and by pathogens, directly or via olfactory routes to basal-forebrain BBB control centers. The BBB benefits from statins, NSAIDs, estrogen, melatonin, memantine, and the Mediterranean diet. Polymicrobial involvement is supported by upregulation of bacterial, viral, and fungal sensors/defenders in the AD brain, blood, or cerebrospinal fluid. AD serum amyloid-β autoantibodies may attenuate its antimicrobial effects favoring microbial survival and cerebral invasion leading to activation of neurodestructive immune/inflammatory processes, which may also be augmented by age-related immunosenescence. AD may thus respond to antibiotic, antifungal, or antiviral therapy.
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25
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Kang Y, Liu L, Feng M, Yuan R, Huang C, Tan Y, Gao P, Xiang D, Zhao X, Li Y, Irwin DM, Shen Y, Ren T. Highly pathogenic H5N6 influenza A viruses recovered from wild birds in Guangdong, southern China, 2014-2015. Sci Rep 2017; 7:44410. [PMID: 28294126 PMCID: PMC5353559 DOI: 10.1038/srep44410] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 02/10/2017] [Indexed: 02/05/2023] Open
Abstract
Since 2013, highly pathogenic (HP) H5N6 influenza A viruses (IAVs) have emerged in poultry in Asia, especially Southeast Asia. These viruses have also caused sporadic infections in humans within the same geographic areas. Active IAV surveillance in wild birds sampled in Guangdong province, China from August 2014 through February 2015 resulted in the recovery of three H5N6 IAVs. These H5N6 IAV isolates possess the basic amino acid motif at the HA1-HA2 cleavage site that is associated with highly pathogenic IAVs infecting chickens. Noteworthy findings include: (1) the HP H5N6 IAV isolates were recovered from three species of apparently healthy wild birds (most other isolates of HP H5N6 IAV in Asia are recovered from dead wild birds or fecal samples in the environment) and (2) these isolates were apparently the first recoveries of HP H5N6 IAV for two of the three species thus expanding the demonstrated natural host range for these lineages of virus. This investigation provides additional insight into the natural history of HP H5N6 IAVs and identifies the occurrence of non-lethal, HP H5N6 IAV infections in wild birds thereby demonstrating the value of active IAV surveillance in wild birds.
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Affiliation(s)
- Yinfeng Kang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Experimental Research, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Lu Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Shantou University Medical College, Shantou 515041, China
| | - Minsha Feng
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Runyu Yuan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 510000, China
| | - Can Huang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Shantou University Medical College, Shantou 515041, China
| | - Yangtong Tan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Pei Gao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Dan Xiang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Shantou University Medical College, Shantou 515041, China
| | - Xiaqiong Zhao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Yanling Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - David M. Irwin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, M5S 1A8, Canada
- Banting and Best Diabetes Centre, University of Toronto, Toronto, M5S 1A8, Canada
| | - Yongyi Shen
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Tao Ren
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou 510642, China
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26
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Yuan R, Liang L, Wu J, Kang Y, Song Y, Zou L, Zhang X, Ni H, Ke C. Human infection with an avian influenza A/H9N2 virus in Guangdong in 2016. J Infect 2017; 74:422-425. [PMID: 28109675 DOI: 10.1016/j.jinf.2017.01.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 01/09/2017] [Accepted: 01/11/2017] [Indexed: 01/07/2023]
Affiliation(s)
- Runyu Yuan
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China
| | - Lijun Liang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China
| | - Jie Wu
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China
| | - Yinfeng Kang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Experimental Research, Sun Yat-sen University Cancer Center, Guangzhou, 510060, PR China
| | - Yingchao Song
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China
| | - Lirong Zou
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China
| | - Xin Zhang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China
| | - Hanzhong Ni
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China
| | - Changwen Ke
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, PR China.
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Rogachev AD, Yarovaya OI, Ankov SV, Khvostov MV, Tolstikova TG, Pokrovsky AG, Salakhutdinov NF. Development and validation of ultrafast LC-MS/MS method for quantification of anti-influenza agent camphecene in whole rat blood using dried blood spots and its application to pharmacokinetic studies. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1036-1037:136-141. [PMID: 27750194 DOI: 10.1016/j.jchromb.2016.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/07/2016] [Accepted: 10/08/2016] [Indexed: 10/20/2022]
Abstract
A fast, selective and sensitive procedure for quantitation of the camphor-based anti-influenza agent camphecene in whole rat blood was developed and validated using dried blood spots and LC-MS/MS. The method was validated according to recommendations of the FDA and EMA in terms of selectivity, linearity, accuracy, precision, recovery, matrix factor, stability, and carry-over. Sample preparation included spotting 20μL of whole blood taken from the tail vein onto the paper, drying and extracting the analyte, followed by evaporation of the solvent and analysis of the residue. HPLC separations were run on a reversed-phase microcolumn; the time of analysis was less than 2min. MS/MS detection was performed on a triple quadrupole mass-spectrometer using multiple reaction monitoring (MRM) mode. Transitions 196.4→122.2/153.3 and 152.2→93.1/107.2 were monitored for camphecene and 2-adamantylamine hydrochloride (internal standard), respectively. The intra- and inter-day precisions and accuracies, matrix factor, carry-over and recovery were within acceptable limits. Despite low extraction recovery (less than 2%), the sensitivity of the method was enough to detect the analyte in the concentration range 50-2500ng/mL. The application of the method was shown in pharmacokinetic studies of camphecene in rats at a dose of 10mg/kg.
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Affiliation(s)
- Artem D Rogachev
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences, Lavrent'eva ave., 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St., 2, 630090 Novosibirsk, Russia.
| | - Olga I Yarovaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences, Lavrent'eva ave., 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St., 2, 630090 Novosibirsk, Russia
| | - Sergey V Ankov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences, Lavrent'eva ave., 9, 630090 Novosibirsk, Russia
| | - Mikhail V Khvostov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences, Lavrent'eva ave., 9, 630090 Novosibirsk, Russia
| | - Tatyana G Tolstikova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences, Lavrent'eva ave., 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St., 2, 630090 Novosibirsk, Russia
| | - Andrey G Pokrovsky
- Novosibirsk State University, Pirogova St., 2, 630090 Novosibirsk, Russia
| | - Nariman F Salakhutdinov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences, Lavrent'eva ave., 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St., 2, 630090 Novosibirsk, Russia
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Tautomeric and non-tautomeric N-substituted 2-iminobenzimidazolines as new lead compounds for the design of anti-influenza drugs: An in vitro study. Bioorg Med Chem 2016; 24:5796-5803. [PMID: 27670100 DOI: 10.1016/j.bmc.2016.09.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 01/04/2023]
Abstract
A series of 1,3-disubstituted 2-iminobenzimidazolines as well as a number of their tautomeric analogs were synthesized. The synthesized compounds were tested for their cytotoxicity against MDCK cells and for inhibiting activity against influenza virus A/California/07/09 (H1N1)pdm09. Based on the results obtained, 50% cytotoxic concentration (CC50), 50% inhibiting concentration (IC50) and selectivity index (SI) were calculated for each compound. It was found that some of synthesized benzimidazole derivatives (7 of 22, 32%) possess strong virus-inhibiting activity against pandemic influenza virus (IC50's in low micromolar range) with quite moderate cytotoxicity (CC50 in the range of thousands micromoles). Due to their high selectivity (highest SI's=50-83) these compounds are of significant interest for further in vivo experiments as well as for further structural optimization and drug development.
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Mapping the Resistance Potential of Influenza's H + Channel against an Antiviral Blocker. J Mol Biol 2016; 428:4209-4217. [PMID: 27524470 DOI: 10.1016/j.jmb.2016.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 08/02/2016] [Accepted: 08/06/2016] [Indexed: 01/20/2023]
Abstract
The development of drug resistance has long plagued our efforts to curtail viral infections in general and influenza in particular. The problem is particularly challenging since the exact mode of resistance may be difficult to predict, without waiting for untreatable strains to evolve. Herein, a different approach is taken. Using a novel genetic screen, we map the resistance options of influenza's M2 channel against its aminoadamantane antiviral inhibitors. In the process, we could identify clinically known resistant mutations in a completely unbiased manner. Additionally, novel mutations were obtained, which, while known to exist in circulating viruses, were not previously classified as drug resistant. Finally, we demonstrated the approach against an anti-influenza drug that has not seen clinical use, identifying several resistance mutations in the process. In conclusion, we present and employ a method to predict the resistance options of influenza's M2 channel to antiviral agents ahead of clinical use and without medical hazard.
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Wang J, Li F, Ma C. Recent progress in designing inhibitors that target the drug-resistant M2 proton channels from the influenza A viruses. Biopolymers 2016; 104:291-309. [PMID: 25663018 DOI: 10.1002/bip.22623] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 01/24/2015] [Indexed: 12/15/2022]
Abstract
Influenza viruses are the causative agents for seasonal influenza, which results in thousands of deaths and millions of hospitalizations each year. Moreover, sporadic transmission of avian or swan influenza viruses to humans often leads to an influenza pandemic, as there is no preimmunity in the human body to fight against such novel strains. The metastable genome of the influenza viruses, coupled with the reassortment of different strains from a wide range of host origins, leads to the continuous evolution of the influenza virus diversity. Such characteristics of influenza viruses present a grand challenge in devising therapeutic strategies to combat influenza virus infection. This review summarizes recent progress in designing small molecule inhibitors that target the drug-resistant influenza A virus M2 proton channels and highlights the contribution of mechanistic studies of proton conductance to drug discovery. The lessons learned throughout the course of M2 drug discovery might provide insights for designing inhibitors that target other therapeutically important ion channels.
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Affiliation(s)
- Jun Wang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721.,BIO5 Institute, University of Arizona, Tucson, AZ, 85721
| | - Fang Li
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721
| | - Chunlong Ma
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721
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Yuan R, Wang Z, Kang Y, Wu J, Zou L, Liang L, Song Y, Zhang X, Ni H, Lin J, Ke C. Continuing Reassortant of H5N6 Subtype Highly Pathogenic Avian Influenza Virus in Guangdong. Front Microbiol 2016; 7:520. [PMID: 27148209 PMCID: PMC4829614 DOI: 10.3389/fmicb.2016.00520] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 03/29/2016] [Indexed: 11/13/2022] Open
Abstract
First identified in May 2014 in China's Sichuan Province, initial cases of H5N6 avian influenza virus (AIV) infection in humans raised great concerns about the virus's prevalence, origin, and development. To evaluate both AIV contamination in live poultry markets (LPMs) and the risk of AIV infection in humans, we have conducted surveillance of LPMs in Guangdong Province since 2013 as part of environmental sampling programs. With environmental samples associated with these LPMs, we performed genetic and phylogenetic analyses of 10 H5N6 AIVs isolated from different cities of Guangdong Province from different years. Results revealed that the H5N6 viruses were reassortants with hemagglutinin (HA) genes derived from clade 2.3.4.4 of H5-subtype AIV, yet neuraminidase (NA) genes derived from H6N6 AIV. Unlike the other seven H5N6 viruses isolated in first 7 months of 2014, all of which shared remarkable sequence similarity with the H5N1 AIV in all internal genes, the PB2 genes of GZ693, GZ670, and ZS558 more closely related to H6N6 AIV and the PB1 gene of GZ693 to the H3-subtype AIV. Phylogenetic analyses revealed that the environmental H5N6 AIV related closely to human H5N6 AIVs isolated in Guangdong. These results thus suggest that continued reassortment has enabled the emergence of a novel H5N6 virus in Guangdong, as well as highlight the potential risk of highly pathogenic H5N6 AIVs in the province.
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Affiliation(s)
- Runyu Yuan
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China; Key Laboratory of Zoonosis Prevention and Control of Guangdong, College of Veterinary Medicine, South China Agricultural UniversityGuangzhou, China
| | - Zheng Wang
- School of Public Health, Sun Yat-Sen University Guangzhou, China
| | - Yinfeng Kang
- Key Laboratory of Zoonosis Prevention and Control of Guangdong, College of Veterinary Medicine, South China Agricultural University Guangzhou, China
| | - Jie Wu
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Lirong Zou
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Lijun Liang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Yingchao Song
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Xin Zhang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Hanzhong Ni
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Jinyan Lin
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Changwen Ke
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
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Shtro AA, Zarubaev VV, Luzina OA, Sokolov DN, Salakhutdinov NF. Derivatives of usnic acid inhibit broad range of influenza viruses and protect mice from lethal influenza infection. Antivir Chem Chemother 2016; 24:92-8. [PMID: 27022094 DOI: 10.1177/2040206616636992] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Influenza is a disease of significant morbidity and mortality, the number of anti-influenza drugs is small; many of them stimulate the appearance of resistant strains. In this work, we demonstrate activity of some usnic acid (UA) derivatives against influenza virus in vitro and in vivo. METHODS Organic synthesis was used to prepare compounds. Antiviral activity of the compounds in vitro was evaluated by their ability to decrease the virus titer on Madin-Darby Canine Kidney cells. In vivo activity was evaluated by decrease of mortality and index of protection. RESULTS Compounds were tested against a broad spectrum of influenza virus strains and showed activity against all used strains. One compound, [5] (valine enamine of UA), also significantly reduced lethality of infected animals and does not give rise to the appearance of resistant strains. Additional studies showed that hepatotoxicity of compound [5] is reduced comparatively to UA. CONCLUSION Our results suggest that valine enamine of UA could be a potential candidate for the development of a new anti-influenza therapy.
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Affiliation(s)
- A A Shtro
- Influenza Research Institute, Laboratory of Antiviral Chemotherapy, Saint-Petersburg, Russia
| | - V V Zarubaev
- Influenza Research Institute, Laboratory of Antiviral Chemotherapy, Saint-Petersburg, Russia
| | - O A Luzina
- Novosibirsk Institute of Organic Chemistry, Department of Medical Chemistry, Novosibirsk, Russia
| | - D N Sokolov
- Novosibirsk Institute of Organic Chemistry, Department of Medical Chemistry, Novosibirsk, Russia
| | - N F Salakhutdinov
- Novosibirsk Institute of Organic Chemistry, Department of Medical Chemistry, Novosibirsk, Russia
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Yuan R, Zou L, Kang Y, Wu J, Zeng X, Lu J, Liang L, Song Y, Zhang X, Ni H, Lin J, Liao M, Ke C. Reassortment of Avian Influenza A/H6N6 Viruses from Live Poultry Markets in Guangdong, China. Front Microbiol 2016; 7:65. [PMID: 26903958 PMCID: PMC4742543 DOI: 10.3389/fmicb.2016.00065] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 01/14/2016] [Indexed: 11/23/2022] Open
Abstract
Since early 2013, H7N9-subtype avian influenza virus (AIV) has caused human infection in eastern China. To evaluate AIV contamination and the public risk of infection, we systematically implemented environmental sampling from live poultry markets in Guangdong Province. Through real-time polymerase chain reaction assays and next-generation sequencing, we generated full nucleotide sequences of all 10 H6N6 AIVs isolated during sampling. Focusing on sequence analyses of hemagglutinin genes of the 10 H6N6 AIVs revealed that the viruses were low pathogenic AIVs with the typical hemagglutinin cleavage site of P-Q-I-E-T-R-G. The hemagglutinin, neuraminidase, and nucleocapsid genes of nine AIVs were of ST2853-like (H6-subtype) lineage, ST192-like (N6-subtype) lineage, and HN573-like (H6-subtype) lineage, respectively; whereas the other five genes were of ST339-like (H6-subtype) lineage. However, the polymerase PB2 and nucleocapsid genes of one strain (HZ057) were of GS/GD-like (H5N1-subtype) and ST339-like lineages. Phylogenic analysis revealed that all eight genes of the 10 viruses belonged to Eurasian avian lineage. Altogether, the 10 AIVs were reassortants of different genetic groups of exchanges with the same virus subtype, thus illustrating the genetic diversity and complexity of H6N6-subtype AIVs in Guangdong Province.
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Affiliation(s)
- Runyu Yuan
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China; Key Laboratory of Zoonosis Prevention and Control of Guangdong, College of Veterinary Medicine, South China Agricultural UniversityGuangzhou, China
| | - Lirong Zou
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
| | - Yinfeng Kang
- Key Laboratory of Zoonosis Prevention and Control of Guangdong, College of Veterinary Medicine, South China Agricultural University Guangzhou, China
| | - Jie Wu
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
| | - Xianqiao Zeng
- Guangdong Provincial Institute of Public Health Guangzhou, China
| | - Jing Lu
- Guangdong Provincial Institute of Public Health Guangzhou, China
| | - Lijun Liang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
| | - Yingchao Song
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
| | - Xin Zhang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
| | - Hanzhong Ni
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
| | - Jinyan Lin
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
| | - Ming Liao
- Key Laboratory of Zoonosis Prevention and Control of Guangdong, College of Veterinary Medicine, South China Agricultural University Guangzhou, China
| | - Changwen Ke
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; World Health Organization Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseasesGuangzhou, China
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Wang J. M2 as a target to combat influenza drug resistance: what does the evidence say? Future Virol 2016. [DOI: 10.2217/fvl.15.95] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jun Wang
- Department of Pharmacology & Toxicology, College of Pharmacy & the BIO5 Institute, The University of Arizona, 1657 E. Helen St., Tucson, AZ 85718, USA
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Zarubaev VV, Garshinina AV, Tretiak TS, Fedorova VA, Shtro AA, Sokolova AS, Yarovaya OI, Salakhutdinov NF. Broad range of inhibiting action of novel camphor-based compound with anti-hemagglutinin activity against influenza viruses in vitro and in vivo. Antiviral Res 2015; 120:126-33. [PMID: 26072310 DOI: 10.1016/j.antiviral.2015.06.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 06/08/2015] [Accepted: 06/09/2015] [Indexed: 10/23/2022]
Abstract
Influenza virus continues to remain one of the leading human respiratory pathogens causing significant morbidity and mortality around the globe. Due to short-term life cycle and high rate of mutations influenza virus is able to rapidly develop resistance to clinically available antivirals. This makes necessary the search and development of new drugs with different targets and mechanisms of activity. Here we report anti-influenza activity of camphor derivative 1,7,7-trimethylbicyclo[2.2.1]heptan-2-ylidene-aminoethanol (camphecene). In in vitro experiments it inhibited influenza viruses A(H1, H1pdm09, H3 and H5 subtypes) and B with EC50's lying in micromolar range. Due to low cytotoxicity it resulted in high selectivity indices (74-661 depending on the virus). This effect did not depend on susceptibility or resistance of the viruses to adamantane derivatives amantadine and rimantadine. The compound appeared the most effective when added at the early stages of viral life cycle (0-2h p.i.). In direct hemagglutinin inhibition tests camphecene was shown to decrease the activity of HA's of influenza viruses A and B. The activity of camphecene was further confirmed in experiments with influenza virus-infected mice, in which, being used orally by therapeutic schedule (once a day, days 1-5 p.i.) it decreased specific mortality of animals infected with both influenza A and B viruses (highest indices of protection 66.7% and 88.9%, respectively). Taken together, these results are encouraging for further development of camphecene-based drug(s) and for exploration of camphor derivatives as highly prospective group of potential antivirals.
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Affiliation(s)
- V V Zarubaev
- Influenza Research Institute, Prof. Popova 15/17, 197376 St. Petersburg, Russia.
| | - A V Garshinina
- Influenza Research Institute, Prof. Popova 15/17, 197376 St. Petersburg, Russia
| | - T S Tretiak
- Influenza Research Institute, Prof. Popova 15/17, 197376 St. Petersburg, Russia
| | - V A Fedorova
- Influenza Research Institute, Prof. Popova 15/17, 197376 St. Petersburg, Russia
| | - A A Shtro
- Influenza Research Institute, Prof. Popova 15/17, 197376 St. Petersburg, Russia
| | - A S Sokolova
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
| | - O I Yarovaya
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
| | - N F Salakhutdinov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
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Naguib MM, Arafa ASA, El-Kady MF, Selim AA, Gunalan V, Maurer-Stroh S, Goller KV, Hassan MK, Beer M, Abdelwhab EM, Harder TC. Evolutionary trajectories and diagnostic challenges of potentially zoonotic avian influenza viruses H5N1 and H9N2 co-circulating in Egypt. INFECTION GENETICS AND EVOLUTION 2015; 34:278-91. [PMID: 26049044 DOI: 10.1016/j.meegid.2015.06.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 05/11/2015] [Accepted: 06/02/2015] [Indexed: 11/17/2022]
Abstract
In Egypt, since 2006, descendants of the highly pathogenic avian influenza virus (HP AIV) H5N1 of clade 2.2 continue to cause sharp losses in poultry production and seriously threaten public health. Potentially zoonotic H9N2 viruses established an endemic status in poultry in Egypt as well and co-circulate with HP AIV H5N1 rising concerns of reassortments between H9N2 and H5N1 viruses along with an increase of mixed infections of poultry. Nucleotide sequences of whole genomes of 15 different isolates (H5N1: 7; H9N2: 8), and of the hemagglutinin (HA) and neuraminidase (NA) encoding segments of nine further clinical samples (H5N1: 2; H9N2: 7) from 2013 and 2014 were generated and analysed. The HA of H5N1 viruses clustered with clade 2.2.1 while the H9 HA formed three distinguishable subgroups within cluster B viruses. BEAST analysis revealed that H9N2 viruses are likely present in Egypt since 2009. Several previously undescribed substituting mutations putatively associated with host tropism and virulence modulation were detected in different proteins of the analysed H9N2 and H5N1 viruses. Reassortment between HP AIV H5N1 and H9N2 is anticipated in Egypt, and timely detection of such events is of public health concern. As a rapid tool for detection of such reassortants discriminative SYBR-Green reverse transcription real-time PCR assays (SG-RT-qPCR), targeting the internal genes of the Egyptian H5N1 and H9N2 viruses were developed for the rapid screening of viral RNAs from both virus isolates and clinical samples. However, in accordance to Sanger sequencing, no reassortants were found by SG-RT-qPCR. Nevertheless, the complex epidemiology of avian influenza in poultry in Egypt will require sustained close observation. Further development and continuing adaptation of rapid and cost-effective screening assays such as the SG-RT-qPCR protocol developed here are at the basis of efforts for improvement the currently critical situation.
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Affiliation(s)
- Mahmoud M Naguib
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, Suedufer 10, 17493 Greifswald-Insel Riems, Germany; National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Dokki, P.O. Box 246, Giza 12618, Egypt
| | - Abdel-Satar A Arafa
- National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Dokki, P.O. Box 246, Giza 12618, Egypt
| | - Magdy F El-Kady
- Poultry Disease Department, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Abdullah A Selim
- National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Dokki, P.O. Box 246, Giza 12618, Egypt
| | - Vithiagaran Gunalan
- Bioinformatics Institute, Agency for Science, Technology and Research, 138671 Singapore, Singapore
| | - Sebastian Maurer-Stroh
- Bioinformatics Institute, Agency for Science, Technology and Research, 138671 Singapore, Singapore; School of Biological Sciences, Nanyang Technological University, 637551 Singapore, Singapore; National Public Health Laboratory, Ministry of Health, 169854 Singapore, Singapore
| | - Katja V Goller
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, Suedufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Mohamed K Hassan
- National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Dokki, P.O. Box 246, Giza 12618, Egypt
| | - Martin Beer
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, Suedufer 10, 17493 Greifswald-Insel Riems, Germany
| | - E M Abdelwhab
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, Suedufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Timm C Harder
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, Suedufer 10, 17493 Greifswald-Insel Riems, Germany.
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37
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Huang Y, Li X, Zhang H, Chen B, Jiang Y, Yang L, Zhu W, Hu S, Zhou S, Tang Y, Xiang X, Li F, Li W, Gao L. Human infection with an avian influenza A (H9N2) virus in the middle region of China. J Med Virol 2015; 87:1641-8. [PMID: 25965534 DOI: 10.1002/jmv.24231] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 03/06/2015] [Accepted: 04/08/2015] [Indexed: 12/18/2022]
Abstract
During the epidemic period of the novel H7N9 viruses, an influenza A (H9N2) virus was isolated from a 7-year-old boy with influenza-like illness in Yongzhou city of Hunan province in November 2013. To identify the possible source of infection, environmental specimens collected from local live poultry markets epidemiologically linked to the human case in Yongzhou city were tested for influenza type A and its subtypes H5, H7, and H9 using real-time RT-PCR methods as well as virus isolation, and four other H9N2 viruses were isolated. The real-time RT-PCR results showed that the environment was highly contaminated with avian influenza H9 subtype viruses (18.0%). Sequencing analyses revealed that the virus isolated from the patient, which was highly similar (98.5-99.8%) to one of isolates from environment in complete genome sequences, was of avian origin. Based on phylogenetic and antigenic analyses, it belonged to genotype S and Y280 lineage. In addition, the virus exhibited high homology (95.7-99.5%) of all six internal gene lineages with the novel H7N9 and H10N8 viruses which caused epidemic and endemic in China. Meanwhile, it carried several mammalian adapted molecular residues including Q226L in HA protein, L13P in PB1 protein, K356R, S409N in PA protein, V15I in M1 protein, I28V, L55F in M2 protein, and E227K in NS protein. These findings reinforce the significance of continuous surveillance of H9N2 influenza viruses.
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Affiliation(s)
- Yiwei Huang
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
| | - Xiaodan Li
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Hong Zhang
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
| | - Bozhong Chen
- Yongzhou City Center for Disease Control and Prevention, Yongzhou, China
| | - Yonglin Jiang
- Yongzhou City Center for Disease Control and Prevention, Yongzhou, China
| | - Lei Yang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Wenfei Zhu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Shixiong Hu
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
| | - Siyu Zhou
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
| | - Yunli Tang
- Yongzhou City Center for Disease Control and Prevention, Yongzhou, China
| | - Xingyu Xiang
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
| | - Fangcai Li
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
| | - Wenchao Li
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
| | - Lidong Gao
- Hunan Provincial Center for Disease Control and Prevention, Changsha, China
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38
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Kurbatov SV, Zarubaev VV, Karpinskaya LA, Shvets AA, Kletsky ME, Burov ON, Morozov PG, Kiselev OI, Minkin VI. Synthesis and antiviral activity of bis-spirocyclic derivatives of rhodanine. Russ Chem Bull 2015. [DOI: 10.1007/s11172-014-0560-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Pitta E, Tsolaki E, Geronikaki A, Petrović J, Glamočlija J, Soković M, Crespan E, Maga G, Bhunia SS, Saxena AK. 4-Thiazolidinone derivatives as potent antimicrobial agents: microwave-assisted synthesis, biological evaluation and docking studies. MEDCHEMCOMM 2015. [DOI: 10.1039/c4md00399c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of ten thiazolidin-4-one derivatives was synthesized and evaluated for their antibacterial, antifungal and HIV-1 reverse transcriptase (RT) inhibitory activity.
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Affiliation(s)
- Eleni Pitta
- Department of Medicinal Chemistry
- School of Pharmacy
- Aristotle University of Thessaloniki
- Thessaloniki
- Greece
| | - Evangelia Tsolaki
- Department of Medicinal Chemistry
- School of Pharmacy
- Aristotle University of Thessaloniki
- Thessaloniki
- Greece
| | - Athina Geronikaki
- Department of Medicinal Chemistry
- School of Pharmacy
- Aristotle University of Thessaloniki
- Thessaloniki
- Greece
| | - Jovana Petrović
- Mycological Laboratory
- Department of Plant Physiology
- Institute for Biological Research Siniša Stanković
- University of Belgrade
- Belgrade
| | - Jasmina Glamočlija
- Mycological Laboratory
- Department of Plant Physiology
- Institute for Biological Research Siniša Stanković
- University of Belgrade
- Belgrade
| | - Marina Soković
- Mycological Laboratory
- Department of Plant Physiology
- Institute for Biological Research Siniša Stanković
- University of Belgrade
- Belgrade
| | | | | | - Shome S. Bhunia
- Academy of Scientific and Innovative Research
- New Delhi
- India
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
| | - Anil K. Saxena
- Academy of Scientific and Innovative Research
- New Delhi
- India
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
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40
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Torres E, Leiva R, Gazzarrini S, Rey-Carrizo M, Frigolé-Vivas M, Moroni A, Naesens L, Vázquez S. Azapropellanes with anti-influenza a virus activity. ACS Med Chem Lett 2014; 5:831-6. [PMID: 25050174 PMCID: PMC4094260 DOI: 10.1021/ml500108s] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 05/02/2014] [Indexed: 12/11/2022] Open
Abstract
The synthesis of several [4,4,3], [4,3,3], and [3,3,3]azapropellanes is reported. Several of the novel amines displayed low-micromolar activities against an amantadine-resistant H1N1 strain, but they did not show activity against an amantadine-sensitive H3N2 strain. None of the tested compounds inhibit the influenza A/M2 proton channel function. Most of the compounds did not show cytotoxicity for MDCK cells.
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Affiliation(s)
- Eva Torres
- Laboratori
de Química Farmacèutica (Unitat Associada al CSIC),
Facultat de Farmàcia, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Diagonal 643, Barcelona E-08028, Spain
| | - Rosana Leiva
- Laboratori
de Química Farmacèutica (Unitat Associada al CSIC),
Facultat de Farmàcia, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Diagonal 643, Barcelona E-08028, Spain
| | - Sabrina Gazzarrini
- Department
of Biosciences and National Research Council (CNR) Biophysics Institute
(IBF), University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Matías Rey-Carrizo
- Laboratori
de Química Farmacèutica (Unitat Associada al CSIC),
Facultat de Farmàcia, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Diagonal 643, Barcelona E-08028, Spain
| | - Marta Frigolé-Vivas
- Laboratori
de Química Farmacèutica (Unitat Associada al CSIC),
Facultat de Farmàcia, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Diagonal 643, Barcelona E-08028, Spain
| | - Anna Moroni
- Department
of Biosciences and National Research Council (CNR) Biophysics Institute
(IBF), University of Milan, Via Celoria 26, 20133 Milan, Italy
| | - Lieve Naesens
- Rega
Institute for Medical Research, KU Leuven, 3000 Leuven, Belgium
| | - Santiago Vázquez
- Laboratori
de Química Farmacèutica (Unitat Associada al CSIC),
Facultat de Farmàcia, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Diagonal 643, Barcelona E-08028, Spain
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41
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Dong G, Luo J, Zhou K, Wu B, Peng C, Ji G, He H. Characterization of the amantadine-resistant H5N1 highly pathogenic avian influenza variants isolated from quails in Southern China. Virus Genes 2014; 49:223-32. [PMID: 24993865 DOI: 10.1007/s11262-014-1084-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 05/05/2014] [Indexed: 10/25/2022]
Abstract
Highly pathogenic H5N1 avian influenza viruses have spread in poultry and wild birds in Asia, Europe, and Africa since 2003. To evaluate the role of quails in the evolution of influenza A virus, we characterized three H5N1 viruses isolated from quails (QA viruses) in southern China. Phylogenetic analysis indicated that three QA viruses derived from the A/goose/Guangdong/1/96-like lineage and most closely related to HA clade 4 A/chicken/Hong Kong/31.4/02-like viruses. Molecular analysis suggested that QA viruses and clade 4 H5N1 viruses carried consistent residue signatures, such as the characteristic M2 Ser31Asn amantadine-resistance mutation, implying a common origin of these viruses. As revealed by viral pathogenicity tests, these QA viruses could replicate in intranasally infected mice, but were not lethal to them, showing low pathogenicity in mammals. However, they killed all intravenously inoculated chickens, showing high pathogenicity in poultry. Results from amantadine sensitivity tests of wild-type QA viruses and their reverse genetic viruses demonstrated that all QA viruses were resistant to amantadine, and the M2 Ser31Asn mutation was determined as the most likely cause of the increased amantadine-resistance of H5N1 QA viruses. Our study confirmed experimentally that the amino acid at residue 31 in the M2 protein plays a major role in determining the amantadine-resistance phenotype of H5N1 influenza viruses. Our findings provide further evidence that quails may play important roles in the evolution of influenza A viruses, which raises concerns over possible transmissions of H5N1 viruses among poultry, wild birds, and humans.
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Affiliation(s)
- Guoying Dong
- College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China
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42
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Kolocouris A, Tzitzoglaki C, Johnson FB, Zell R, Wright AK, Cross TA, Tietjen I, Fedida D, Busath DD. Aminoadamantanes with persistent in vitro efficacy against H1N1 (2009) influenza A. J Med Chem 2014; 57:4629-39. [PMID: 24793875 PMCID: PMC4127532 DOI: 10.1021/jm500598u] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
![]()
A series of 2-adamantanamines with
alkyl adducts of various lengths
were examined for efficacy against strains of influenza A including
those having an S31N mutation in M2 proton channel that confer resistance
to amantadine and rimantadine. The addition of as little as one CH2 group to the methyl adduct of the amantadine/rimantadine
analogue, 2-methyl-2-aminoadamantane, led to activity in vitro against
two M2 S31N viruses A/Calif/07/2009 (H1N1) and A/PR/8/34 (H1N1) but
not to a third A/WS/33 (H1N1). Solid state NMR of the transmembrane
domain (TMD) with a site mutation corresponding to S31N shows evidence
of drug binding. But electrophysiology using the full length S31N
M2 protein in HEK cells showed no blockade. A wild type strain, A/Hong
Kong/1/68 (H3N2) developed resistance to representative drugs within
one passage with mutations in M2 TMD, but A/Calif/07/2009 S31N was
slow (>8 passages) to develop resistance in vitro, and the resistant
virus had no mutations in M2 TMD. The results indicate that 2-alkyl-2-aminoadamantane
derivatives with sufficient adducts can persistently block p2009 influenza
A in vitro through an alternative mechanism. The observations of an
HA1 mutation, N160D, near the sialic acid binding site in both 6-resistant A/Calif/07/2009(H1N1) and the broadly resistant
A/WS/33(H1N1) and of an HA1 mutation, I325S, in the 6-resistant virus at a cell-culture stable site suggest that the drugs
tested here may block infection by direct binding near these critical
sites for virus entry to the host cell.
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Affiliation(s)
- Antonios Kolocouris
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens , Athens 15771, Greece
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Abstract
Influenza A and B viruses are highly contagious respiratory pathogens with a considerable medical and socioeconomical burden and known pandemic potential. Current influenza vaccines require annual updating and provide only partial protection in some risk groups. Due to the global spread of viruses with resistance to the M2 proton channel inhibitor amantadine or the neuraminidase inhibitor oseltamivir, novel antiviral agents with an original mode of action are urgently needed. We here focus on emerging options to interfere with the influenza virus entry process, which consists of the following steps: attachment of the viral hemagglutinin to the sialylated host cell receptors, endocytosis, M2-mediated uncoating, low pH-induced membrane fusion, and, finally, import of the viral ribonucleoprotein into the nucleus. We review the current functional and structural insights in the viral and cellular components of this entry process, and the diverse antiviral strategies that are being explored. This encompasses small molecule inhibitors as well as macromolecules such as therapeutic antibodies. There is optimism that at least some of these innovative concepts to block influenza virus entry will proceed from the proof of concept to a more advanced stage. Special attention is therefore given to the challenging issues of influenza virus (sub)type-dependent activity or potential drug resistance.
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Affiliation(s)
| | - Lieve Naesens
- Rega Institute for Medical ResearchKU LeuvenLeuvenBelgium
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44
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Sokolova AS, Yarovaya OCI, Korchagina DV, Zarubaev VV, Tretiak TS, Anfimov PM, Kiselev OI, Salakhutdinov NF. Camphor-based symmetric diimines as inhibitors of influenza virus reproduction. Bioorg Med Chem 2014; 22:2141-8. [PMID: 24631360 PMCID: PMC7126937 DOI: 10.1016/j.bmc.2014.02.038] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 02/14/2014] [Accepted: 02/18/2014] [Indexed: 11/27/2022]
Abstract
Influenza is a continuing world-wide public health problem that causes significant morbidity and mortality during seasonal epidemics and sporadic pandemics. The purpose of the study was synthesis and investigation of antiviral activity of camphor-based symmetric diimines and diamines. A set of C2-symmetric nitrogen-containing camphor derivatives have been synthesized. The antiviral activity of these compounds was studied against rimantadine- and amantadine-resistant influenza virus A/California/7/09 (H1N1)pdm09 in MDCK cells. The highest efficacy in virus inhibiting was shown for compounds 2a-e with cage moieties bound by aliphatic linkers. The therapeutic index (selectivity index) for 2b exceeded that for reference compounds amantadine, deitiforin and rimantadine almost 10-fold. As shown by structure-activity analysis, the length of the linker has a dramatic effect on the toxicity of compounds. Compound 2e with -C12H24- linker exhibited the lowest toxicity (CTD50=2216μM). Derivatives of camphor, therefore, can be considered as prospective antiinfluenza compounds active against influenza viruses resistant to adamantane-based drugs.
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Affiliation(s)
- Anastasiya S Sokolova
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
| | - O Cyrilliclga I Yarovaya
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia.
| | - Dina V Korchagina
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia
| | - Vladimir V Zarubaev
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia.
| | - Tatiana S Tretiak
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia
| | - Pavel M Anfimov
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia
| | - Oleg I Kiselev
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia
| | - Nariman F Salakhutdinov
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia
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45
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Sokolova AS, Yarovaya ОI, Shernyukov АV, Pokrovsky МA, Pokrovsky АG, Lavrinenko VA, Zarubaev VV, Tretiak TS, Anfimov PM, Kiselev OI, Beklemishev AB, Salakhutdinov NF. New quaternary ammonium camphor derivatives and their antiviral activity, genotoxic effects and cytotoxicity. Bioorg Med Chem 2013; 21:6690-8. [PMID: 23993669 PMCID: PMC7126328 DOI: 10.1016/j.bmc.2013.08.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/31/2013] [Accepted: 08/05/2013] [Indexed: 12/20/2022]
Abstract
The synthesis and biological evaluation of a novel series of dimeric camphor derivatives are described. The resulting compounds were studied for their antiviral activity, cyto- and genotoxicity. Compounds 3a and 3d in which the quaternary nitrogen atoms are separated by the C5H10 and С9H18 aliphatic chain, exhibited the highest efficiency as an agent inhibiting the reproduction of the influenza virus A(H1N1)pdm09. The cytotoxicity data of compounds 3 and 4 revealed their moderate activity against malignant cell lines; compound 3f had the highest activity for the CEM-13 cells. These results show close agreement with the data of independent studies on toxicity of these compounds, in particular that the toxicity of compounds strongly depends on spacer length.
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Affiliation(s)
- Anastasiya S. Sokolova
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
| | - Оlga I. Yarovaya
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
| | - Аndrey V. Shernyukov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia
| | | | | | | | - Vladimir V. Zarubaev
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia
| | - Tatiana S. Tretiak
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia
| | - Pavel M. Anfimov
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia
| | - Oleg I. Kiselev
- Department of Chemotherapy, Influenza Research Institute, 15/17 Prof. Popova St., 197376 St. Petersburg, Russia
| | - Anatoly B. Beklemishev
- Research Institute for Biochemistry, Siberian Branch of the Russian Academy of Medical Sciences, Timakova St. 2, 630117 Novosibirsk, Russia
| | - Nariman F. Salakhutdinov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Lavrentjev Avenue 9, 630090 Novosibirsk, Russia
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46
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Zhao G, Chen C, Huang J, Wang Y, Peng D, Liu X. Characterisation of one H6N6 influenza virus isolated from swine in China. Res Vet Sci 2013; 95:434-6. [PMID: 23856405 DOI: 10.1016/j.rvsc.2013.06.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 06/12/2013] [Accepted: 06/18/2013] [Indexed: 11/16/2022]
Abstract
There is multiple evidence that swine may act as a vessel for the generation of novel influenza A viruses. In this study, we have analyzed the evolution and pathogenicity of one strain of H6N6 influenza virus isolated from swine with clinical signs of infection in China. Although phylogenetic analysis revealed that this virus might originate from domestic ducks, pathogenicity experiments indicated that the virus replicated in mice without prior adaptation. These findings suggest that the virus has transmitted from ducks to swine in China, and replicated in mammalian hosts without prior adaptation, which may pose a threat to both veterinary and public health.
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Affiliation(s)
- Guo Zhao
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China
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Gerloff NA, Jones J, Simpson N, Balish A, ElBadry MA, Baghat V, Rusev I, de Mattos CC, de Mattos CA, Zonkle LEA, Kis Z, Davis CT, Yingst S, Cornelius C, Soliman A, Mohareb E, Klimov A, Donis RO. A high diversity of Eurasian lineage low pathogenicity avian influenza A viruses circulate among wild birds sampled in Egypt. PLoS One 2013; 8:e68522. [PMID: 23874653 PMCID: PMC3710070 DOI: 10.1371/journal.pone.0068522] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 05/29/2013] [Indexed: 11/18/2022] Open
Abstract
Surveillance for influenza A viruses in wild birds has increased substantially as part of efforts to control the global movement of highly pathogenic avian influenza A (H5N1) virus. Studies conducted in Egypt from 2003 to 2007 to monitor birds for H5N1 identified multiple subtypes of low pathogenicity avian influenza A viruses isolated primarily from migratory waterfowl collected in the Nile Delta. Phylogenetic analysis of 28 viral genomes was performed to estimate their nearest ancestors and identify possible reassortants. Migratory flyway patterns were included in the analysis to assess gene flow between overlapping flyways. Overall, the viruses were most closely related to Eurasian, African and/or Central Asian lineage low pathogenicity viruses and belonged to 15 different subtypes. A subset of the internal genes seemed to originate from specific flyways (Black Sea-Mediterranean, East African-West Asian). The remaining genes were derived from a mixture of viruses broadly distributed across as many as 4 different flyways suggesting the importance of the Nile Delta for virus dispersal. Molecular clock date estimates suggested that the time to the nearest common ancestor of all viruses analyzed ranged from 5 to 10 years, indicating frequent genetic exchange with viruses sampled elsewhere. The intersection of multiple migratory bird flyways and the resulting diversity of influenza virus gene lineages in the Nile Delta create conditions favoring reassortment, as evident from the gene constellations identified by this study. In conclusion, we present for the first time a comprehensive phylogenetic analysis of full genome sequences from low pathogenic avian influenza viruses circulating in Egypt, underscoring the significance of the region for viral reassortment and the potential emergence of novel avian influenza A viruses, as well as representing a highly diverse influenza A virus gene pool that merits continued monitoring.
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Affiliation(s)
- Nancy A. Gerloff
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Joyce Jones
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Natosha Simpson
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Amanda Balish
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Maha Adel ElBadry
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | - Verina Baghat
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | | | - Cecilia C. de Mattos
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | - Carlos A. de Mattos
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | | | - Zoltan Kis
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- National Center for Epidemiology, Budapest, Hungary
| | - C. Todd Davis
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Sam Yingst
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | - Claire Cornelius
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | - Atef Soliman
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | - Emad Mohareb
- Viral and Zoonotic Diseases Research Program, United States Naval Medical Research Unit 3, Cairo, Egypt
| | - Alexander Klimov
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Ruben O. Donis
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- * E-mail:
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Hoque MA, Tun HM, Hassan MM, Khan SA, Islam SA, Islam MN, Giasuddin M, Osmani TMG, Islam A, Thornton RN, Burgess GW, Skerratt LF, Selleck P, Brun E, Debnath NC, Leung FCC. Molecular epidemiology of influenza A (H5N1) viruses, Bangladesh, 2007-2011. Prev Vet Med 2013; 111:314-8. [PMID: 23820377 DOI: 10.1016/j.prevetmed.2013.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 06/01/2013] [Accepted: 06/07/2013] [Indexed: 10/26/2022]
Abstract
To investigate the origins, evolution and patterns of spread of HPAI H5N1 outbreaks in Bangladesh, we performed a phylogenetic reconstruction analysis using Bayesian methods. The analysis was conducted using 81 hemagglutinin (HA) gene sequences from the H5N1 viruses isolated in Bangladesh from 2007 to 2011, together with 264 publicly available HA sequences of clade 2.2, 2.3.2 and 2.3.4 retrieved from GenBank. Our study provides evidence that clade 2.2.2 viruses that caused outbreaks in Bangladesh were lineages independent from the viruses introduced earlier into India. Furthermore, the Bangladesh clade 2.2.2 descendents subsequently spread to India and Bhutan. This has implications for avian influenza control in southern Asia suggesting multiple routes of entry of the virus including one pathway that spread to neighboring countries via Bangladesh.
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Affiliation(s)
- Md Ahasanul Hoque
- Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh.
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Torres E, Duque MD, Vanderlinden E, Ma C, Pinto LH, Camps P, Froeyen M, Vázquez S, Naesens L. Role of the viral hemagglutinin in the anti-influenza virus activity of newly synthesized polycyclic amine compounds. Antiviral Res 2013; 99:281-91. [PMID: 23800838 PMCID: PMC7114147 DOI: 10.1016/j.antiviral.2013.06.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 05/13/2013] [Accepted: 06/12/2013] [Indexed: 01/05/2023]
Abstract
We report on the synthesis of polycyclic amines designed as ring-rearranged analogs of amantadine. Only one compound inhibited A/M2 proton channel function. However, they showed low-micromolar activity against A/H1N1, but not A/H3N2 influenza viruses. A/PR/8/34 mutants selected for resistance to these compounds possessed mutation in the viral hemagglutinin.
We here report on the synthesis of new series of polycyclic amines initially designed as ring-rearranged analogs of amantadine and featuring pentacyclo, hexacyclo, and octacyclo rings. A secondary amine, 3-azahexacyclo[7.6.0.01,5.05,12.06,10.011,15]pentadeca-7,13-diene, 3, effectively inhibited A/M2 proton channel function, and, moreover, possessed dual activity against an A/H3N2 virus carrying a wild-type A/M2 proton channel, as well as an amantadine-resistant A/H1N1 virus. Among the polycyclic amines that did not inhibit influenza A/M2 proton channel function, several showed low-micromolar activity against tested A/H1N1 strains (in particular, the A/PR/8/34 strain), but not A/H3N2 influenza viruses. A/PR/8/34 mutants selected for resistance to these compounds possessed mutations in the viral hemagglutinin that markedly increased the hemolysis pH. Our data suggest that A/H1N1 viruses such as the A/PR/8/34 strain are particularly sensitive to a subtle increase in the endosomal pH, as caused by the polycyclic amine compounds.
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Affiliation(s)
- Eva Torres
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Diagonal 643, Barcelona E-08028, Spain
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Zhu G, Wang R, Xuan F, Daszak P, Anthony SJ, Zhang S, Zhang L, He G. Characterization of recombinant H9N2 influenza viruses isolated from wild ducks in China. Vet Microbiol 2013; 166:327-36. [PMID: 23830774 DOI: 10.1016/j.vetmic.2013.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 05/07/2013] [Accepted: 05/22/2013] [Indexed: 11/29/2022]
Abstract
Wild birds are considered to be the natural reservoirs for avian influenza A viruses (AIV). During active influenza surveillance in Poyang Lake of southeast China, we isolated and characterized 11 H9N2 viruses from two species of wild ducks. Phylogenetic analysis showed that the 11 isolates were almost identical with 99.3-100% nucleotide homology in their entire genome, and they all closely related in whole eight genes (95.6-99.4% homology) to human H9N2 isolates (HK/33982/2009) and clustered in the same sublineage. The isolates belonged to triple reassortant H9N2 genotype viruses containing Ck/Bei-like NA genes, Y439-like PA genes and six other G1-like genes. We also found that the subtype of virus replicated efficiently in the lungs and tracheas of BALB/c mice and caused mortality in 20-40% of infected groups after 3-6 days, which indicates that the subtype of virus is capable of establishing lethal mammalian infections. However, whether or not the virus has features transmittable from wild ducks to humans is not known. This study showed H9N2 subtype avian influenza virus for the first time in wild birds, and suggests that wild birds may carry the virus along migratory routes, highlighting the need for continued surveillance of wild birds.
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Affiliation(s)
- Guangjian Zhu
- Institutes for Advanced Studies in Multidisciplinary Science and Technology, East China Normal University, Shanghai, People's Republic of China
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