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Baghban N, Momeni S, Behboudi E, Dianat-Moghadam H, Darabi A, Targhi HS, Keshavarz M. Green synthesis of MnO 2 NPs using Arabic gum: assessing its potential antiviral activity against influenza A/H1N1. Virol J 2024; 21:48. [PMID: 38395943 PMCID: PMC10893694 DOI: 10.1186/s12985-024-02315-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 02/12/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND The antiviral properties of metal nanoparticles against various viruses, including those resistant to drugs, are currently a subject of intensive research. Recently, the green synthesis of nanoparticles and their anti-viral function have attracted a lot of attention. Previous studies have shown promising results in the use of Arabic gum for the green synthesis of nanoparticles with strong antiviral properties. In this study we aimed to investigate the antiviral effects of MnO2 nanoparticles (MnO2-NPs) synthesized using Arabic gum, particularly against the influenza virus. METHODS Arabic gum was used as a natural polymer to extract and synthesize MnO2-NPs using a green chemistry approach. The synthesized MnO2-NPs were characterized using SEM and TEM. To evaluate virus titration, cytotoxicity, and antiviral activity, TCID50, MTT, and Hemagglutination assay (HA) were performed, respectively. Molecular docking studies were also performed to investigate the potential antiviral activity of the synthesized MnO2-NPs against the influenza virus. The molecular docking was carried out using AutoDock Vina software followed by an analysis with VMD software to investigate the interaction between Arabic gum and the hemagglutinin protein. RESULTS Simultaneous combination treatment with the green-synthesized MnO2-NPs resulted in a 3.5 log HA decrement and 69.7% cellular protection, which demonstrated the most significant difference in cellular protection compared to the virus control group (p-value < 0.01). The docking results showed that binding affinities were between - 3.3 and - 5.8 kcal/mole relating with the interaction between target with MnO2 and beta-D-galactopyranuronic acid, respectively. CONCLUSION The results of the study indicated that the MnO2-NPs synthesized with Arabic gum had significant antiviral effects against the influenza virus, highlighting their potential as a natural and effective treatment for inhibition of respiratory infections.
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Affiliation(s)
- Neda Baghban
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Safieh Momeni
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Emad Behboudi
- Department of Basic Medical Sciences, Khoy University of Medical Sciences, Khoy, Iran
| | - Hassan Dianat-Moghadam
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
- Pediatric Inherited Diseases Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Amirhossein Darabi
- The Persian Gulf Tropical Medicine Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | | | - Mohsen Keshavarz
- The Persian Gulf Tropical Medicine Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran.
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Khodsiani M, Kianmehr Z, Brycki B, Szulc A, Mehrbod P. Evaluation of the antiviral potential of gemini surfactants against influenza virus H1N1. Arch Microbiol 2023; 205:184. [PMID: 37039867 PMCID: PMC10088587 DOI: 10.1007/s00203-023-03478-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 03/09/2023] [Indexed: 04/12/2023]
Abstract
Influenza A virus (IAV) affects human health worldwide as a high-risk disease. It can neither be easily controlled by current vaccines and nor be treated by conventional drugs. Gemini surfactants (GS) have shown several properties including antiviral activity. In this study, the antiviral capacity of some GS compounds with different levels of hydrophobicity was examined. The 50% cytotoxic (CC50) and non-cytotoxic (NCTC) concentrations of the compounds were determined by MTT method. The NCTCs, the same as effective concentrations (EC50s), were tested for the antiviral capacity against IAV in different combination treatments for 1 h incubation on MDCK cells. The HA and MTT assays were used to evaluate the virus titer and cell viabilities, respectively. The hemolytic activity of the compounds was also assessed using an HA inhibition assay. To evaluate the apoptotic effect of GS compounds, Annexin V-PI kit was used. The HA titers decreased between 1-6.5 logs, 1-4.5 logs, and 1-5.5 logs in simultaneous, pre- and post-penetration combination treatments, respectively. The cell viability values in all combination treatments were favorable. The HI assay indicated the hemolytic potential of GSs and their physical interaction with viral HA. The apoptosis test results highlighted anti-apoptotic capacity of the GS compounds alone and in the presence of influenza virus especially for the hydrophobic ones. Gemini surfactants were generally more efficacious in simultaneous treatment. Their antiviral potential may be attributed to their physical interaction with viral membrane or HA glycoprotein that disrupts viral particle or blocks viral entry to the cell and inhibits its propagation.
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Affiliation(s)
- Mehrnaz Khodsiani
- Department of Biochemistry, Faculty of Biological Sciences, North Tehran Branch, Islamic Azad University, Tehran, Iran
- Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran, Iran
| | - Zahra Kianmehr
- Department of Biochemistry, Faculty of Biological Sciences, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Bogumil Brycki
- Department of Bioactive Compounds, Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland
| | - Adrianna Szulc
- Department of Bioactive Compounds, Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland
| | - Parvaneh Mehrbod
- Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran, Iran.
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Pirali Hamedani M, Ahmad Kashi M, Goodarzi S, Shokouhi H, Shafiee Ardestani M, Hadjiakhoondi A, Pirali Hamedani M, Ghahremani MH, Mehrbod P, Tofighi Z. Elucidation of flavonoids from potent Iranian Scutellaria species against Influenza A (H1N1) virus. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2023; 26:76-84. [PMID: 36594062 PMCID: PMC9790063 DOI: 10.22038/ijbms.2022.66255.14553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 11/16/2022] [Indexed: 01/04/2023]
Abstract
Objectives Influenza A virus (IAV) is a contagious illness. Different species of Scutellaria genus are used as a traditional remedy to reduce influenza symptoms. This study aimed to investigate the anti-influenza capacity of several species of Iranian Scutellaria and identify active compounds of the most potent species for the first time. Materials and Methods Some Iranian species of Scutellaria were collected from different regions of Iran, including S. pinnatifida with mucida, viridis, and alpina subspecies; S. tournefortii; S. tomentosa; S. persica. They were fractionated to chloroform and methanol. The total phenols and flavonoids of samples were examined by the folin-ciocalteau and aluminum-flavonoid complex methods, respectively. The 50% cytotoxic concentrations (CC50) on MDCK cells and non-cytotoxic concentrations (NCTC) were determined by MTT assay. The percentage of cell protection against IAV and their effect on virus titer were investigated in pre-, post-, and co-penetration treatment groups. Phytochemicals of the most effective species were isolated by various chromatographic methods and identified by different spectroscopic methods. Results Methanol fraction of S. pinnatifida subsp. viridis demonstrated the highest amounts of flavonoid content and best activity against influenza A virus in all combination treatments, which reduced the virus titer by 5 logs with no cytotoxicity. Kaempferol-3-O-glucoside, quercetin-3-O-glucoside, apigenin-4'-methoxy-7-O-glucoside, luteolin, and luteolin-7-O-glucoside were purified and identified from this species. Conclusion Scutellaria pinnatifida subsp. viridis can be introduced as a source of flavonoids with acceptable anti-influenza activity. S. tomentosa also showed potent antiviral effects and is a candidate for elucidation in further studies.
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Affiliation(s)
- Mostafa Pirali Hamedani
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahtab Ahmad Kashi
- 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
| | - Hadiseh Shokouhi
- Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran, Iran
| | - Mahdi Shafiee Ardestani
- Department of Radiopharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Hadjiakhoondi
- 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
| | - Morteza Pirali Hamedani
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hosein Ghahremani
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Parvaneh Mehrbod
- Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran, Iran ,Corresponding authors: Parvaneh Mehrbod. Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran, Iran. Tel: +98-21-64121220; +98-21-64112176; Fax: +98-21-64121202; ; 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. Tel: +98-21-64121220; +98-21-64112176; Fax: +98-21-64121202;
| | - 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,Corresponding authors: Parvaneh Mehrbod. Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran, Iran. Tel: +98-21-64121220; +98-21-64112176; Fax: +98-21-64121202; ; 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. Tel: +98-21-64121220; +98-21-64112176; Fax: +98-21-64121202;
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Wang X, Wei S, Zhao C, Li X, Jin J, Shi X, Su Z, Li J, Wang J. Promising application of polyoxometalates in the treatment of cancer, infectious diseases and Alzheimer's disease. J Biol Inorg Chem 2022; 27:405-419. [PMID: 35713714 PMCID: PMC9203773 DOI: 10.1007/s00775-022-01942-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 05/09/2022] [Indexed: 11/28/2022]
Abstract
As shown in studies conducted in recent decades, polyoxometalates (POMs), as inorganic metal oxides, have promising biological activities, including antitumor, anti-infectious and anti-Alzheimer’s activities, due to their special structures and properties. However, some side effects impede their clinical applications to a certain extent. Compared with unmodified POMs, POM-based inorganic–organic hybrids and POM-based nanocomposite structures show significantly enhanced bioactivity and reduced side effects. In this review, we introduce the biological activities of POMs and their derivatives and highlight the side effects of POMs on normal cells and organisms and their possible mechanisms of action. We then propose a development direction for overcoming their side effects. POMs are expected to constitute a new generation of inorganic metal drugs for the treatment of cancer, infectious diseases, and Alzheimer's disease. Graphical abstract![]()
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Affiliation(s)
- Xuechen Wang
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Shengnan Wei
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Chao Zhao
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Xin Li
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Jin Jin
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Xuening Shi
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Zhenyue Su
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Juan Li
- School of Public Health, Jilin University, Changchun, Jilin, China.
| | - Juan Wang
- School of Public Health, Jilin University, Changchun, Jilin, China.
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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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Shoji M, Sugimoto M, Matsuno K, Fujita Y, Mii T, Ayaki S, Takeuchi M, Yamaji S, Tanaka N, Takahashi E, Noda T, Kido H, Tokuyama T, Tokuyama T, Tokuyama T, Kuzuhara T. A novel aqueous extract from rice fermented with Aspergillus oryzae and Saccharomyces cerevisiae possesses an anti-influenza A virus activity. PLoS One 2021; 16:e0244885. [PMID: 33449947 PMCID: PMC7810313 DOI: 10.1371/journal.pone.0244885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 12/17/2020] [Indexed: 11/24/2022] Open
Abstract
Human influenza virus infections occur annually worldwide and are associated with high morbidity and mortality. Hence, development of novel anti-influenza drugs is urgently required. Rice Power® extract developed by the Yushin Brewer Co. Ltd. is a novel aqueous extract of rice obtained via saccharization and fermentation with various microorganisms, such as Aspergillus oryzae, yeast [such as Saccharomyces cerevisiae], and lactic acid bacteria, possessing various biological and pharmacological properties. In our previous experimental screening with thirty types of Rice Power® extracts, we observed that the 30th Rice Power® (Y30) extract promoted the survival of influenza A virus-infected Madin-Darby canine kidney (MDCK) cells. Therefore, to identify compounds for the development of novel anti-influenza drugs, we aimed to investigate whether the Y30 extract exhibits anti-influenza A virus activity. In the present study, we demonstrated that the Y30 extract strongly promoted the survival of influenza A H1N1 Puerto Rico 8/34 (A/PR/8/34), California 7/09, or H3N2 Aichi 2/68 (A/Aichi/2/68) viruses-infected MDCK cells and inhibited A/PR/8/34 or A/Aichi/2/68 viruses infection and growth in the co-treatment and pre-infection experiments. The pre-treatment of Y30 extract on MDCK cells did not induce anti-influenza activity in the cell. The Y30 extract did not significantly affect influenza A virus hemagglutination, and neuraminidase and RNA-dependent RNA polymerase activities. Interestingly, the electron microscopy experiment revealed that the Y30 extract disrupts the integrity of influenza A virus particles by permeabilizing the viral membrane envelope, suggesting that Y30 extract has a direct virucidal effect against influenza A virus. Furthermore, we observed that compared to the ethyl acetate (EtOAc) extract, the water extract of Y30 extract considerably promoted the survival of cells infected with A/PR/8/34 virus. These results indicated that more anti-influenza components were present in the water extract of Y30 extract than in the EtOAc extract. Our results highlight the potential of a rice extract fermented with A. oryzae and S. cerevisiae as an anti-influenza medicine and a drug source for the development of anti-influenza compounds.
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Affiliation(s)
- Masaki Shoji
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Tokushima Bunri University, Yamashiro-cho, Tokushima, Japan
- * E-mail: (MS); (TK)
| | - Minami Sugimoto
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Tokushima Bunri University, Yamashiro-cho, Tokushima, Japan
| | - Kosuke Matsuno
- Yushin Brewer Co. Ltd., Ono, Ayagawa-cho, Ayauta-gun, Kagawa, Japan
| | - Yoko Fujita
- Laboratory of Ultrastructural Virology, Graduate School of Biostudies, Kyoto University, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, Japan
- Laboratory of Ultrastructural Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, Japan
| | - Tomohiro Mii
- Yushin Brewer Co. Ltd., Ono, Ayagawa-cho, Ayauta-gun, Kagawa, Japan
| | - Satomi Ayaki
- Yushin Brewer Co. Ltd., Ono, Ayagawa-cho, Ayauta-gun, Kagawa, Japan
| | - Misa Takeuchi
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Tokushima Bunri University, Yamashiro-cho, Tokushima, Japan
| | - Saki Yamaji
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Tokushima Bunri University, Yamashiro-cho, Tokushima, Japan
| | - Narue Tanaka
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Tokushima Bunri University, Yamashiro-cho, Tokushima, Japan
| | - Etsuhisa Takahashi
- Division of Pathology and Metabolome Research for Infectious Disease and Host Defense, Institute for Enzyme Research, University of Tokushima, Kuramoto-cho, Tokushima, Japan
| | - Takeshi Noda
- Laboratory of Ultrastructural Virology, Graduate School of Biostudies, Kyoto University, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, Japan
- Laboratory of Ultrastructural Virology, Institute for Frontier Life and Medical Sciences, Kyoto University, Shogoin Kawahara-cho, Sakyo-ku, Kyoto, Japan
| | - Hiroshi Kido
- Division of Pathology and Metabolome Research for Infectious Disease and Host Defense, Institute for Enzyme Research, University of Tokushima, Kuramoto-cho, Tokushima, Japan
| | - Takaaki Tokuyama
- Yushin Brewer Co. Ltd., Ono, Ayagawa-cho, Ayauta-gun, Kagawa, Japan
| | | | - Takashi Tokuyama
- Yushin Brewer Co. Ltd., Ono, Ayagawa-cho, Ayauta-gun, Kagawa, Japan
| | - Takashi Kuzuhara
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Tokushima Bunri University, Yamashiro-cho, Tokushima, Japan
- * E-mail: (MS); (TK)
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Dan K, Katoh N, Matsuoka T, Fujinami K. In vitro Antimicrobial Effects of Virus Block, Which Contains Multiple Polyoxometalate Compounds, and Hygienic Effects of Virus Block-Supplemented Moist Hand Towels. Pharmacology 2019; 104:1-15. [PMID: 31170720 PMCID: PMC6604270 DOI: 10.1159/000500897] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 05/13/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Historical evidence has verified the multifaceted antiviral efficacy of polyoxometalates (PMs). METHODS We carried out a study to investigate the antimicrobial effects of each of the 5 substances comprising virus block (VB): 3 PMs that have antibacterial and antiviral activity, an antibiotic agent, and an antibacterial agent. We also investigated the effectiveness of the addition of VB to moist hand towels in a study involving 120 volunteers. The time-dependent changes in metal ion concentrations in aqueous VB solution were analyzed using inductively coupled plasma atomic emission spectroscopy. RESULTS The metal elements in the aqueous VB solution remained stable for 12 weeks without undergoing time-dependent changes. DISCUSSION Further investigations were performed to study hand hygiene using moist hand towels in daily life settings. To this end, 120 volunteers provided 240 specimens that were used to investigate the presence of antibacterial compounds on the volunteers' hands before and after hand towel use. An aliquot of each specimen was suspended in phosphate-buffered saline and plated on agar media, and the number of colonies formed was counted. Normal bacterial flora found on the hands of the volunteers was investigated before and after the use of 4 different moist hand towels. CONCLUSIONS The effects of VB and PMs were superior to those of commercial moist hand towels, indicating that effective data were obtained that may be useful for the practical application of the tested items.
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Affiliation(s)
- Katsuaki Dan
- Research and Development Division, Research Organization of Biological Activity, Tokyo, Japan
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Mehrbod P, Abdalla MA, Njoya EM, Ahmed AS, Fotouhi F, Farahmand B, Gado DA, Tabatabaian M, Fasanmi OG, Eloff JN, McGaw LJ, Fasina FO. South African medicinal plant extracts active against influenza A virus. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 18:112. [PMID: 29587734 PMCID: PMC5872571 DOI: 10.1186/s12906-018-2184-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 03/22/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Influenza infection remains a major health threat for animals and humans which crucially requires effective antiviral remedies. The usage of herbal medications as readily available alternatives for their compatibility with the body and fewer side effects compared to synthetic chemical treatments has become popular globally. The aim of this study was to investigate and screen in vitro anti-influenza activity of extracts of five South African medicinal plants, namely Tabernaemontana ventricosa, Cussonia spicata, Rapanea melanophloeos, Pittosporum viridiflorum and Clerodendrum glabrum, species which are used traditionally for the treatment of several diseases such as inflammatory and respiratory diseases. METHODS Methanol, ethanol (100% and 30%), acetone, hot and cold water extracts of the powdered plants leaves were obtained by standard methods. The cytotoxicity was determined by the MTT colorimetric assay on MDCK cells. The concentrations below CC50 values were tested for antiviral activity against influenza A virus (IAV) in different combination treatments. The effect of extracts on viral surface glycoproteins and viral titer were tested by HI and HA virological assays, respectively. RESULTS Based on the applied methods, the most effective results against IAV were obtained from Rapanea melanophloeos methanol leaf extract (EC50 = 113.3 μg/ml) and Pittosporum viridiflorum methanol, 100% and 30% ethanol and acetone leaf extracts (EC50 values = 3.6, 3.4, 19.2, 82.3 μg/ml, respectively) in all types of combined treatments especially in pre- and post-penetration combined treatments with highly significant effects against viral titer (P ≤ 0.01). CONCLUSION The outcomes offer for the first time a scientific basis for the use of extracts of Rapanea melanophloeos and Pittosporum viridiflorum against IAV. It is worth focusing on the isolation and identification of effective active compounds and elucidating the mechanism of action from these species. However, Tabernaemontana ventricosa, Cussonia spicata and Clerodendrum glabrum leaf extracts were ineffective in vitro in this study.
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Affiliation(s)
- Parvaneh Mehrbod
- 0000 0001 2107 2298grid.49697.35Department of Veterinary Tropical Diseases, University of Pretoria, Pretoria, South Africa
- 0000 0000 9562 2611grid.420169.8Influenza and Other Respiratory Viruses Department, Pasteur Institute of IRAN, Tehran, Iran
| | - Muna A. Abdalla
- 0000 0001 2107 2298grid.49697.35Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Pretoria, South Africa
| | - Emmanuel M. Njoya
- 0000 0001 2107 2298grid.49697.35Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Pretoria, South Africa
| | - Aroke S. Ahmed
- 0000 0001 2107 2298grid.49697.35Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Pretoria, South Africa
- grid.463291.bFederal Institute of Industrial Research, Oshodi, Lagos, Nigeria
| | - Fatemeh Fotouhi
- 0000 0000 9562 2611grid.420169.8Influenza and Other Respiratory Viruses Department, Pasteur Institute of IRAN, Tehran, Iran
| | - Behrokh Farahmand
- 0000 0000 9562 2611grid.420169.8Influenza and Other Respiratory Viruses Department, Pasteur Institute of IRAN, Tehran, Iran
| | - Dorcas A. Gado
- 0000 0001 2107 2298grid.49697.35Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Pretoria, South Africa
| | - Mansoureh Tabatabaian
- 0000 0000 9562 2611grid.420169.8Influenza and Other Respiratory Viruses Department, Pasteur Institute of IRAN, Tehran, Iran
| | - Olubunmi G. Fasanmi
- 0000 0001 2107 2298grid.49697.35Department of Production Animal Studies, University of Pretoria, Pretoria, South Africa
- Department of Animal Health, Federal College of Animal Health and Production Technology, Ibadan, Nigeria
| | - Jacobus N. Eloff
- 0000 0001 2107 2298grid.49697.35Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Pretoria, South Africa
| | - Lyndy J. McGaw
- 0000 0001 2107 2298grid.49697.35Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Pretoria, South Africa
| | - Folorunso O. Fasina
- 0000 0001 2107 2298grid.49697.35Department of Veterinary Tropical Diseases, University of Pretoria, Pretoria, South Africa
- ECTAD, Food and Agriculture Organization of the United Nations (FAO), Block P, Level 3, United Nations Complex, UN Avenue, Gigiri, Nairobi, Kenya
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Čolović MB, Medić B, Ćetković M, Kravić Stevović T, Stojanović M, Ayass WW, Mougharbel AS, Radenković M, Prostran M, Kortz U, Krstić DZ. Toxicity evaluation of two polyoxotungstates with anti-acetylcholinesterase activity. Toxicol Appl Pharmacol 2017; 333:68-75. [PMID: 28830837 DOI: 10.1016/j.taap.2017.08.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 10/19/2022]
Abstract
A toxicity evaluation of two Keggin-type heteropolytungstates, K7[Ti2PW10O40]·6H2O and K6H[SiV3W9O40]·3H2O, with different inhibitory potencies toward acetylcholinesterase activity (IC50 values of 1.04×10-6 and 4.80×10-4mol/L, respectively) was performed. Wistar albino rats were orally treated with single doses (5 and 50mg/kg) of both investigated compounds. The biochemical parameters of renal (serum urea and creatinine) and liver function (direct and total bilirubin, alanine transaminase, and aspartate aminotransferase) were determined after 24h and 14days. A histopathological analysis of liver tissue was carried out 14days after the polyoxotungstate administration. Both applied doses of the investigated compounds did not induce statistically significant alterations of the renal function markers. However, the polyoxotungstate treatment caused an increase in the activities of serum alanine transaminase and aspartate aminotransferase in a time- and concentration-dependent manner, although statistically significant changes in bilirubin concentrations were not observed. Furthermore, the detected hepatotoxic effect was confirmed by histhopathological analysis that suggested some reversible liver tissue damage two weeks after the treatment, especially in the case of K6H[SiV3W9O40]·3H2O. Accordingly, the toxicity of these two polyoxotungstates with anti-acetylcholinesterase effect cannot be considered as a severe one, but their potential clinical application would require a more complex toxicological study.
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Affiliation(s)
- Mirjana B Čolović
- Department of Physical Chemistry, "Vinča" Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - Branislava Medić
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Mila Ćetković
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Serbia
| | - Tamara Kravić Stevović
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Serbia
| | - Marko Stojanović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Wassim W Ayass
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Ali S Mougharbel
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Miroslav Radenković
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Milica Prostran
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Ulrich Kortz
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany.
| | - Danijela Z Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Serbia.
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Synthesis and evaluation of pyridinium polyoxometalates as anti-HIV-1 agents. Bioorg Med Chem Lett 2017; 27:2357-2359. [DOI: 10.1016/j.bmcl.2017.04.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/01/2017] [Accepted: 04/07/2017] [Indexed: 01/26/2023]
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Liu HY, Pan XL, Tian JN, Sun H, Huan Q, Huang YL, Liu JQ. Na 7CrCuW 11O 39.16H 2O induces apoptosis in human ovarian cancer SKOV3 cells through the p38 signaling pathway. Oncol Lett 2017; 13:2418-2424. [PMID: 28454413 DOI: 10.3892/ol.2017.5719] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 09/09/2016] [Indexed: 12/16/2022] Open
Abstract
Ovarian carcinoma is a common malignant disease worldwide with a poor therapeutic response. The present study investigated the effects of Na7CrCuW11O39.16H2O (CrCuW11) on ovarian cancer cell growth and investigated the mechanisms underlying its actions. The effects of CrCuW11 on cell viability and apoptosis were measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay, acridine orange/ethidium bromide staining and electron microscopy in human ovarian cancer SKOV3 cells. The expression of bcl-2-like protein 4 (Bax), B-cell lymphoma 2 (Bcl-2), cytochrome c, phosphorylated (p)-p38 and p38 was determined by western blot analysis. Caspase-3 activity was measured by caspase-3 activity kit. CrCuW11 concentrations of 1.87×10-3 mol. l-1 at 12 h reduced viability induced apoptosis in SKOV3 cells in a concentration-and time-dependent manner. Forced expression of CrCuW11 upregulated the expression of certain proteins (Bax, cytochrome c, and p-p38), and downregulated Bcl-2 protein expression. Furthermore, CrCuW11 also enhanced caspase-3 activity. The p38 inhibitor SB203580 was able to inhibit the activity of CrCuW11. Caspase-3 and p38 signaling pathways were associated with CrCuW11-regulated multiple targets involved in SKOV3 cell proliferation. Therefore, the results of the present study indicated that CrCuW11 may be used as a novel clinical drug for the treatment of ovarian cancer.
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Affiliation(s)
- Hai-Ying Liu
- Department of Reproductive Medicine Center, Key Laboratory for Reproductive Medicine of Guangdong, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510005, P.R. China
| | - Xiu-Li Pan
- Department of Clinical Skill Center Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, Heilongjiang 150081, P.R. China
| | - Jia-Nan Tian
- Department of Neurology, 2nd Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150050 P.R. China
| | - Hui Sun
- College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150050 P.R. China
| | - Qing Huan
- Department of Reproductive Medicine Center, Key Laboratory for Reproductive Medicine of Guangdong, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510005, P.R. China
| | - Yu-Ling Huang
- Department of Reproductive Medicine Center, Key Laboratory for Reproductive Medicine of Guangdong, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510005, P.R. China
| | - Jian-Qiao Liu
- Department of Reproductive Medicine Center, Key Laboratory for Reproductive Medicine of Guangdong, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510005, P.R. China
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12
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Shoji M, Woo SY, Masuda A, Win NN, Ngwe H, Takahashi E, Kido H, Morita H, Ito T, Kuzuhara T. Anti-influenza virus activity of extracts from the stems of Jatropha multifida Linn. collected in Myanmar. Altern Ther Health Med 2017; 17:96. [PMID: 28173854 PMCID: PMC5297253 DOI: 10.1186/s12906-017-1612-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 01/28/2017] [Indexed: 11/10/2022]
Abstract
Background To contribute to the development of novel anti-influenza drugs, we investigated the anti-influenza activity of crude extracts from 118 medicinal plants collected in Myanmar. We discovered that extract from the stems of Jatropha multifida Linn. showed anti-influenza activity. J. multifida has been used in traditional medicine for the treatment of various diseases, and the stem has been reported to possess antimicrobial, antimalarial, and antitumor activities. However, the anti-influenza activity of this extract has not yet been investigated. Methods We prepared water (H2O), ethyl acetate (EtOAc), n-hexane (Hex), and chloroform (CHCl3) extracts from the stems of J. multifida collected in Myanmar, and examined the survival of Madin-Darby canine kidney (MDCK) cells infected with the influenza A (H1N1) virus, and the inhibitory effects of these crude extracts on influenza A viral infection and growth in MDCK cells. Results The H2O extracts from the stems of J. multifida promoted the survival of MDCK cells infected with the influenza A H1N1 virus. The EtOAc and CHCl3 extracts resulted in similar, but weaker, effects. The H2O, EtOAc, and CHCl3 extracts from the stems of J. multifida inhibited influenza A virus H1N1 infection; the H2O extract possessed the strongest inhibitory effect on influenza infection in MDCK cells. The EtOAc, Hex, and CHCl3 extracts all inhibited the growth of influenza A H1N1 virus, and the CHCl3 extract demonstrated the strongest activity in MDCK cells. Conclusion The H2O or CHCl3 extracts from the stems of J. multifida collected in Myanmar demonstrated the strongest inhibition of influenza A H1N1 viral infection or growth in MDCK cells, respectively. These results indicated that the stems of J. multifida could be regarded as an anti-influenza herbal medicine as well as a potential crude drug source for the development of anti-influenza compounds.
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Roch-Marchal C, Hidalgo T, Banh H, Fischer RA, Horcajada P. A Promising Catalytic and Theranostic Agent Obtained through the In-Situ Synthesis of Au Nanoparticles with a Reduced Polyoxometalate Incorporated within Mesoporous MIL-101. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600359] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Catherine Roch-Marchal
- Institut Lavoisier; UMR CNRS 8180; Université de Versailles Saint-Quentin-en-Yvelines; 45 Av. des Etats-Unis 78035 Versailles cedex France
| | - Tania Hidalgo
- Institut Lavoisier; UMR CNRS 8180; Université de Versailles Saint-Quentin-en-Yvelines; 45 Av. des Etats-Unis 78035 Versailles cedex France
| | - Hung Banh
- Chair of Inorganic and Metal-Organic Chemistry; Technical University Munich; Lichtenbergstrasse 4 85478 Garching Germany
- Catalysis Research Centre Technical University Munich; Technical University Munich; Ernst-Otto-Fischer-Strasse 1 85478 Garching Germany
| | - Roland A. Fischer
- Chair of Inorganic and Metal-Organic Chemistry; Technical University Munich; Lichtenbergstrasse 4 85478 Garching Germany
- Catalysis Research Centre Technical University Munich; Technical University Munich; Ernst-Otto-Fischer-Strasse 1 85478 Garching Germany
| | - Patricia Horcajada
- Institut Lavoisier; UMR CNRS 8180; Université de Versailles Saint-Quentin-en-Yvelines; 45 Av. des Etats-Unis 78035 Versailles cedex France
- IMDEA Energy; Avda. Ramón de la Sagra 3 28035 Móstoles Madrid Spain
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Arns S, Balgi AD, Shimizu Y, Pfeifer TA, Kumar N, Shidmoossavee FS, Sun S, Tai SSH, Agafitei O, Jaquith JB, Bourque E, Niikura M, Roberge M. Novel spirothiazamenthane inhibitors of the influenza A M2 proton channel. Eur J Med Chem 2016; 120:64-73. [PMID: 27187859 DOI: 10.1016/j.ejmech.2016.05.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 05/04/2016] [Accepted: 05/05/2016] [Indexed: 01/19/2023]
Abstract
The development of treatments for influenza that inhibit the M2 proton channel without being susceptible to the widespread resistance mechanisms associated with the adamantanes is an ongoing challenge. Using a yeast high-throughput yeast growth restoration assay designed to identify M2 channel inhibitors, a single screening hit was uncovered. This compound (3), whose structure was incorrectly identified in the literature, is an inhibitor with similar potency to amantadine against WT M2. A library of derivatives of 3 was prepared and activity against WT M2 and the two principal mutant strains (V27A and S31N) was assessed in the yeast assay. The best compounds were further evaluated in an antiviral plaque reduction assay using engineered WT, V27A and S31N M2 influenza A strains with otherwise identical genetic background. Compound 63 was found to inhibit all three virus strains in this cell based antiviral assay at micromolar concentrations, possibly through a mechanism other than M2 inhibition.
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Affiliation(s)
- Steve Arns
- The Centre for Drug Research and Development, Vancouver, BC, Canada
| | - Aruna D Balgi
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada
| | - Yoko Shimizu
- The Centre for Drug Research and Development, Vancouver, BC, Canada
| | - Tom A Pfeifer
- The Centre for Drug Research and Development, Vancouver, BC, Canada
| | - Nag Kumar
- The Centre for Drug Research and Development, Vancouver, BC, Canada
| | | | - Sharon Sun
- The Centre for Drug Research and Development, Vancouver, BC, Canada
| | - Sheldon S-H Tai
- Faculty of Heath Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Olga Agafitei
- Faculty of Heath Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - James B Jaquith
- The Centre for Drug Research and Development, Vancouver, BC, Canada
| | - Elyse Bourque
- The Centre for Drug Research and Development, Vancouver, BC, Canada
| | - Masahiro Niikura
- Faculty of Heath Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Michel Roberge
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.
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15
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Chen Q, Zhang DD, Wang MM, Chen XW, Wang JH. A novel organic–inorganic hybrid polyoxometalate for the selective adsorption/isolation of β-lactoglobulin. J Mater Chem B 2015; 3:6964-6970. [DOI: 10.1039/c5tb01298h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel polyoxometalate (POM)-based organic–inorganic hybrid is preparedviaa one-pot hydrothermal reaction between Keggin POM and a star-like N-donor ligand. The hybrid exhibits excellent adsorption performance towards β-lactoglobulin with a favorable sorption capacity.
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Affiliation(s)
- Qing Chen
- Research Center for Analytical Sciences
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Dan-Dan Zhang
- Research Center for Analytical Sciences
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Meng-Meng Wang
- Research Center for Analytical Sciences
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Xu-Wei Chen
- Research Center for Analytical Sciences
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
| | - Jian-Hua Wang
- Research Center for Analytical Sciences
- College of Sciences
- Northeastern University
- Shenyang 110819
- China
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Charyasriwong S, Watanabe K, Rahmasari R, Matsunaga A, Haruyama T, Kobayashi N. In vitro evaluation of synergistic inhibitory effects of neuraminidase inhibitors and methylglyoxal against influenza virus infection. Arch Med Res 2014; 46:8-16. [PMID: 25523147 DOI: 10.1016/j.arcmed.2014.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 12/09/2014] [Indexed: 01/18/2023]
Abstract
BACKGROUND AND AIMS Influenza virus infections are serious public health concerns worldwide that cause considerable mortality and morbidity. Moreover, the emergence of resistance to anti-influenza viral agents underscores the need to develop new anti-influenza viral agents and novel treatment strategies. Recently, we identified anti-influenza viral activity of manuka honey. Therefore, we hypothesized that methylglyoxal (MGO), a key component of manuka honey, may impart anti-influenza viral activity. The aim of this study was to evaluate the anti-influenza viral activity of MGO and its potential in combination treatments with neuraminidase (NA) inhibitors. METHODS MDCK cells were used to evaluate anti-influenza viral activity. To evaluate the mechanism of MGO, plaque inhibition assays were performed. The synergistic effects of MGO and viral NA inhibitors were tested. RESULTS MGO inhibited influenza virus A/WSN/33 replication 50% inhibitory concentration = 240 ± 190 μM; 50% cytotoxic concentration = 1.4 ± 0.4 mM; selective index (SI) = 5.8, which is related to its virucidal effects. Moreover, we found that MGO showed promising activity against various influenza strains. A synergistic effect was observed by a marked increase in SI of NA inhibitors at ∼1/100(th) of their single usage. A synergistic effect of MGO and oseltamivir was also observed against oseltamivir-resistant virus. CONCLUSIONS Our results showed that MGO has potent inhibitory activity against influenza viruses and also enhanced the effect of NA inhibitors. Thus, the co-administration of MGO and NA inhibitors should be considered for treatment of influenza virus infections.
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Affiliation(s)
- Siriwan Charyasriwong
- Laboratory of Molecular Biology of Infectious Agents, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Ken Watanabe
- Laboratory of Molecular Biology of Infectious Agents, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Ratika Rahmasari
- Laboratory of Molecular Biology of Infectious Agents, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Ayaka Matsunaga
- Laboratory of Molecular Biology of Infectious Agents, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Takahiro Haruyama
- Laboratory of Molecular Biology of Infectious Agents, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan; Central Research Center, AVSS Corporation, Nagasaki, Japan
| | - Nobuyuki Kobayashi
- Laboratory of Molecular Biology of Infectious Agents, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan; Central Research Center, AVSS Corporation, Nagasaki, Japan.
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17
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Chen Q, Shen LM, Xia J, Chen XW, Wang JH. Preparation of Keggin-type phosphomolybdate by a one-step solid-state reaction at room temperature and its application in protein adsorption. J Sep Sci 2014; 37:2716-23. [DOI: 10.1002/jssc.201400401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 06/11/2014] [Accepted: 07/01/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Qing Chen
- Research Center for Analytical Sciences; College of Sciences; Northeastern University; Shenyang China
| | - Li-Ming Shen
- Research Center for Analytical Sciences; College of Sciences; Northeastern University; Shenyang China
| | - Jie Xia
- Research Center for Analytical Sciences; College of Sciences; Northeastern University; Shenyang China
| | - Xu-Wei Chen
- Research Center for Analytical Sciences; College of Sciences; Northeastern University; Shenyang China
| | - Jian-Hua Wang
- Research Center for Analytical Sciences; College of Sciences; Northeastern University; Shenyang China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
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18
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Wang J, Qu X, Qi Y, Li J, Song X, Li L, Yin D, Xu K, Li J. Pharmacokinetics of anti-HBV polyoxometalate in rats. PLoS One 2014; 9:e98292. [PMID: 24921932 PMCID: PMC4055585 DOI: 10.1371/journal.pone.0098292] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 04/30/2014] [Indexed: 01/17/2023] Open
Abstract
Polyoxometalates are non-nucleoside analogs that have been proven to exhibit broad-spectrum antiviral activity. In particular, Cs2K4Na[SiW9Nb3O40].H2O 1 shows low toxicity and high activity against HBV. The preclinical pharmacokinetics of Compound 1 in rats were characterized by establishing and applying inductively coupled plasma-mass spectrometry method to determine the concentration of W in plasma, urine, feces, bile and organ samples. The quantitative ICP-MS method demonstrated good sensitivity and application in the pharmacokinetics study of polyoxometalates. The pharmacokinetic behavior of Compound 1 after intravenous or oral administration fit a two-compartment model. Tmax ranges from 0.1 h to 3 h and the T1/2 of Compound 1 is between 20 h and 30 h. The absolute bioavailability of Compound 1 at 45, 180 and 720 mg/kg groups were 23.68%, 14.67% and 11.93%, respectively. The rates of plasma protein binding of Compound 1 at 9, 18 and 36 mg/ml of Compound 1 are 62.13±9.41%, 71.20±24.98% and 49.00±25.59%, respectively. Compound 1 was widely distributed throughout the body, and high levels of compound 1 were found in the kidney and liver. The level of Compound 1 in excretion was lower: 30% for urine, 0.28% for feces and 0.42% for bile, respectively. For elaborate pharmacokinetic characteristics to be fully understood, the metabolism of Compound 1 needs to be studied further.
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Affiliation(s)
- Juan Wang
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Xiaofeng Qu
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Yanfei Qi
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Jinhua Li
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Xiuling Song
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Li Li
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Dehui Yin
- School of Public Health, Jilin University, Changchun, Jilin, China
| | - Kun Xu
- School of Public Health, Jilin University, Changchun, Jilin, China
- * E-mail: (JL); (KX)
| | - Juan Li
- School of Public Health, Jilin University, Changchun, Jilin, China
- * E-mail: (JL); (KX)
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Müller WEG, Wang X, Schröder HC. Polyoxometalates active against tumors, viruses, and bacteria. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2013; 54:65-116. [PMID: 24420711 PMCID: PMC7122307 DOI: 10.1007/978-3-642-41004-8_4] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Polyoxometalates (PMs) as discrete metal-oxide cluster anions with high solubility in water and photochemically and electrochemically active property have a wide variety of structures not only in molecular size from sub-nano to sub-micrometers with a various combination of metals but also in symmetry and highly negative charge. One of the reasons for such a structural variety originates from their conformation change (due to the condensed aggregation and the structural assembly) which strongly depends on environmental parameters such as solution pH, concentration, and coexistent foreign inorganic and/or organic substances. In the course of the application of the physicochemical properties of such PMs to the medical fields, antitumoral, antiviral, and antibacterial activities have been developed for realization of a novel inorganic medicine which provides a biologically excellent activity never replaced by other approved medicines. Several PMs as a candidate for clinical uses have been licensed toward the chemotherapy of solid tumors (such as human gastric cancer and pancreatic cancer), DNA and RNA viruses (such as HSV, HIV, influenza, and SARS), and drug-resistant bacteria (such as MRSA and VRSA) in recent years: [NH3Pr(i)]6[Mo7O24]∙3H2O (PM-8) and [Me3NH]6[H2Mo(V) 12O28(OH)12(Mo(VI)O3)4]∙2H2O (PM-17) for solid tumors; K7[PTi2W10O40]∙6H2O (PM-19), [Pr(i)NH3]6H[PTi2W10O38(O2)2]∙H2O (PM-523), and K11H[(VO)3(SbW9O33)2]∙27H2O (PM-1002) for viruses; and K6[P2W18O62]∙14H2O (PM-27), K4[SiMo12O40]∙3H2O (SiMo12), and PM-19 for MRSA and VRSA. The results are discussed from a point of view of the chemotherapeutic clarification in this review.
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Affiliation(s)
- Werner E. G. Müller
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Xiaohong Wang
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Heinz C. Schröder
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
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Liu L, Li W, Wei K, Cao J, Luo J, Wang B, Min S. Synergistic effect of sevoflurane and isoflurane on inhibition of the adult-type muscle nicotinic acetylcholine receptor by rocuronium. J Anesth 2012; 27:351-8. [PMID: 23238810 DOI: 10.1007/s00540-012-1527-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 11/15/2012] [Indexed: 10/27/2022]
Abstract
PURPOSE Inhaled anesthetics increase the incidence of postoperative residual neuromuscular blockade, and the mechanism is still unclear. We have investigated the synergistic effect of low-concentration inhaled anesthetics and rocuronium on inhibition of the inward current of the adult-type muscle nicotinic acetylcholine receptor (ε-nAChR). METHODS Adult-type mouse muscle ε-nAChR was expressed in HEK293 cells by liposome transfection. The inward current of the ε-nAChR was activated by use of 10 μmol/L acetylcholine alone or in combination with different concentrations of sevoflurane, isoflurane, or rocuronium. The concentration-response curves of five cells were constructed, and the data yielded the 5, 25, and 50 % inhibitory concentrations (IC5, IC25, and IC50, respectively) for single-drug application. Subsequently, the functional channels were perfused by adding 0.5 IC5 of either sevoflurane or isoflurane (aqueous concentrations 140 and 100 μmol/L, respectively) to the solution, followed by addition of IC5, IC25, or IC50 rocuronium. The amount of inhibition was calculated to quantify their synergistic effect. RESULTS The inhibitory effect of rocuronium was enhanced by sevoflurane or isoflurane in a concentration-dependent manner. Sevoflurane or isoflurane (0.5 IC5) with rocuronium at IC5, IC25, and IC50 synergistically inhibited the current amplitude of adult-type muscle ε-nAChR. When the IC5 of rocuronium was used, isoflurane had a stronger synergistic effect than sevoflurane (p < 0.05). When rocuronium was applied at higher concentrations (IC25 and IC50), sevoflurane had an effect similar to that of isoflurane. For both inhaled anesthetics, the synergistic effect was more intense for rocuronium at IC5 than for rocuronium at IC25 or IC50. CONCLUSION Residual-concentration sevoflurane or isoflurane has a strong synergistic effect with rocuronium at clinically relevant residual concentrations. A lower rocuronium concentration resulted in a stronger synergistic effect.
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Affiliation(s)
- Li Liu
- Department of Anesthesiology, First Affiliated Hospital of Chongqing Medical University, Friendship Road #1, Yuan Jia Gang, Chongqing, China
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Lv H, Geletii YV, Zhao C, Vickers JW, Zhu G, Luo Z, Song J, Lian T, Musaev DG, Hill CL. Polyoxometalate water oxidation catalysts and the production of green fuel. Chem Soc Rev 2012; 41:7572-89. [PMID: 22972187 DOI: 10.1039/c2cs35292c] [Citation(s) in RCA: 524] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In the last five years and currently, research on solar fuels has been intense and no sub-area in this field has been more active than the development of water oxidation catalysts (WOCs). In this timeframe, a new class of molecular water oxidation catalysts based on polyoxometalates have been reported that combine the advantages of homogeneous and heterogeneous catalysts. This review addresses central issues in green energy generation, the challenges in water oxidation catalyst development, and the possible uses of polyoxometalates in green energy science.
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Affiliation(s)
- Hongjin Lv
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
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Geisberger G, Gyenge EB, Maake C, Patzke GR. Trimethyl and carboxymethyl chitosan carriers for bio-active polymer-inorganic nanocomposites. Carbohydr Polym 2012; 91:58-67. [PMID: 23044105 DOI: 10.1016/j.carbpol.2012.08.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/17/2012] [Accepted: 08/04/2012] [Indexed: 01/28/2023]
Abstract
The carrier properties of carboxymethyl chitosan (CMC) and trimethyl chitosan (TMC) in combination with polyoxometalates (POMs) as inorganic drug prototypes are compared with respect to the influence of polymer matrix charge and structure on the emerging composites. A direct crosslinking approach with TMC and K(6)H(2)[CoW(11)TiO(40)]·13H(2)O ({CoW(11)TiO(40)}) as a representative anticancer POM affords nanocomposites with a size range of 50-90nm. The obtained POM-chitosan composites are characterized with a wide range of analytical methods, and POM encapsulation into positively charged TMC brings forward different nanocomposite morphologies and properties than CMC as a carrier material. Furthermore, uptake of fluorescein isothiocyanate (FITC) labeled POM-CMC and POM-TMC by HeLa cells was monitored, and the influence of chlorpromazine (CP) as inhibitor of the clathrin mediated pathway revealed different cellular uptake behavior of composites and pristine carriers. TMC/{CoW(11)TiO(40)} nanocomposites are taken up by HeLa cells after short incubation times around 30 min at low concentrations. The anticancer activity of pristine {CoW(11)TiO(40)} and its TMC-nanocomposites was investigated in vitro with MTT assays and compared to a reference POM.
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Affiliation(s)
- Georg Geisberger
- Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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23
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Mehrbod P, Ideris A, Omar AR, Hair-Bejo M, Tan SW, Kheiri MT, Tabatabaian M. Attenuation of influenza virus infectivity with herbal-marine compound (HESA-A): an in vitro study in MDCK cells. Virol J 2012; 9:44. [PMID: 22340010 PMCID: PMC3296628 DOI: 10.1186/1743-422x-9-44] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Accepted: 02/16/2012] [Indexed: 01/25/2023] Open
Abstract
Background The influenza virus is still one of the most important respiratory risks affecting humans which require effective treatments. In this case, traditional medications are of interest. HESA-A is an active natural biological compound from herbal-marine origin. Previous studies have reported that the therapeutic properties of HESA-A are able to treat psoriasis vulgaris and cancers. However, no antiviral properties have been reported. Methods This study was designed to investigate the potential antiviral properties of HESA-A and its effects in modulating TNF-α and IL-6 cytokine levels. HESA-A was prepared in normal saline as a stock solution (0.8 mg/ml, pH = 7.4). Percentages of cell survival when exposed to different concentrations of HESA-A at different time intervals was determined by MTT assay. To study the potential antiviral activity of HESA-A, Madin-Darby Canine Kidney (MDCK) cells were treated with the effective concentration (EC50) of HESA-A (0.025 mg/ml) and 100 TCID50/0.1 ml of virus sample under different types of exposure. Results Based on the MTT method and hemagglutination assay (HA), HESA-A is capable of improving cell viability to 31% and decreasing HA titre to almost 99% in co-penetration exposures. In addition, based on quantitative real-time PCR (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA), it was found that HESA-A causes decrements in TNF-α and IL-6 cytokine expressions, which was significant for TNF-α (p ≤ 0.05) but not for IL-6. Conclusion In conclusion, HESA-A was effective against influenza infection through suppressing cytokine expression.
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Affiliation(s)
- Parvaneh Mehrbod
- Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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Hosseini SM, Amini E, Tavassoti Kheiri M, Mehrbod P, Shahidi M, Zabihi E. Anti-influenza Activity of a Novel Polyoxometalate Derivative (POM-4960). INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE 2012; 1:21-9. [PMID: 24551755 PMCID: PMC3920487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
There are many effective chemotherapeutic agents used in influenza disease which some of them inhibit virus replication by interfering with FluV (influenza virus) viral binding or its penetration into cell membrane. A series of polyoxometalates compounds such as POM-523 and PM-504 have been synthesized and have showed inhibitory effects on viruses. In this study we examined anti influenza activity of a novel polyoxometalate derivative (POM-4960) synthesized in the Faculty of Chemistry of Damghan University of Basic Sciences. To evaluate the anti-influenza activity of POM, following the treatment of FluV with POM at different temperatures and incubation periods, viral titer reduction was assessed by haemaglutination assay (HA). The 3-(4,5- dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to determine TCID50 (tissue culture infective dose) of virus, CC50 (median cytotoxic concentration) of POM, protection percentage and antiviral activity of POM in cell culture. RT-PCR and direct Immunofluorescent assays were performed to evaluate the effect of POM on viral infection and viral RNA load, respectively. POM reduced HA titer near to zero in all cell culture specimens and showed high protection against viral infection of the cells. Reduction in viral infection was confirmed by RT-PCR and Immunofluorescent staining methods. Moreover, this POM derivative has a dual (cumulative) effect on attachment and penetration inhibition compared to other POM's with just one inhibitory effect. POM-4960 could be considered as a powerful anti-influenza agent with low toxicity and high antiviral potency.
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Affiliation(s)
- Seyed Masoud Hosseini
- Department of Microbiology, Faculty of Biological Sciences, Shahid Beheshti University, Tehran, Iran
| | - Elham Amini
- Influenza Unit, Pasteur Institute of IRAN, Tehran, Iran ,Corresponding author: Influenza Unit, Pasteur Institute of IRAN, 12 Farvardin St. Tehran, Iran. E-mail:
| | | | | | - Mahsa Shahidi
- Influenza Unit, Pasteur Institute of IRAN, Tehran, Iran
| | - Ebrahim Zabihi
- Cellular and Molecular Biology Research Center, Babol University of Medical Sciences, Babol, Iran
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25
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Flütsch A, Schroeder T, Grütter MG, Patzke GR. HIV-1 protease inhibition potential of functionalized polyoxometalates. Bioorg Med Chem Lett 2010; 21:1162-6. [PMID: 21256010 PMCID: PMC7126215 DOI: 10.1016/j.bmcl.2010.12.103] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 12/20/2010] [Accepted: 12/21/2010] [Indexed: 11/21/2022]
Abstract
Polyoxometalates (POMs) are interesting biomedical agents due to their versatile anticancer and antiviral properties, such as remarkable anti-HIV activity. Although POMs are tunable and easily accessible inorganic drug prototypes in principle, their full potential can only be tapped by enhancing their biocompatibility, for example, through organic functionalization. We have therefore investigated the HIV-1 protease inhibition potential of functionalized Keggin- and Dawson-type POMs with organic side chains. Their inhibitory performance was furthermore compared to other POM types, and the buffer dependence of the results is discussed. In addition, chemical shift mapping NMR experiments were performed to exclude POM–substrate interactions. Whereas the introduction of organic side chains into POMs is a promising approach in principle, the influence of secondary effects on the reaction system also merits detailed investigation.
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Affiliation(s)
- Andreas Flütsch
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Thilo Schroeder
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Markus G. Grütter
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Greta R. Patzke
- Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
- Corresponding author. Tel.: +41 44 635 4691; fax: +41 44 635 6802.
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26
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Govorkova EA, Webster RG. Combination chemotherapy for influenza. Viruses 2010; 2:1510-1529. [PMID: 21994692 PMCID: PMC3185732 DOI: 10.3390/v2081510] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Revised: 07/09/2010] [Accepted: 07/21/2010] [Indexed: 12/30/2022] Open
Abstract
The emergence of pandemic H1N1 influenza viruses in April 2009 and the continuous evolution of highly pathogenic H5N1 influenza viruses underscore the urgency of novel approaches to chemotherapy for human influenza infection. Anti-influenza drugs are currently limited to the neuraminidase inhibitors (oseltamivir and zanamivir) and to M2 ion channel blockers (amantadine and rimantadine), although resistance to the latter class develops rapidly. Potential targets for the development of new anti-influenza agents include the viral polymerase (and endonuclease), the hemagglutinin, and the non-structural protein NS1. The limitations of monotherapy and the emergence of drug-resistant variants make combination chemotherapy the logical therapeutic option. Here we review the experimental data on combination chemotherapy with currently available agents and the development of new agents and therapy targets.
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Affiliation(s)
| | - Robert G. Webster
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1 901-595-3400; Fax: +1 901-595-8559
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27
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Tang G, Qiu Z, Lin X, Li W, Zhu L, Li S, Li H, Wang L, Chen L, Wu JZ, Yang W. Discovery of novel 1-phenyl-cycloalkane carbamides as potent and selective influenza fusion inhibitors. Bioorg Med Chem Lett 2010; 20:3507-10. [PMID: 20494579 DOI: 10.1016/j.bmcl.2010.04.141] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 04/28/2010] [Accepted: 04/30/2010] [Indexed: 10/19/2022]
Abstract
A novel class of HA inhibitors (4a) was identified based on ligand similarity search of known HA inhibitors. Parallel synthesis and further structural modifications resulted in 1-phenyl-cyclopentanecarboxylic acid (4-cyano-phenyl)-methyl-amide 4t as a potent and selective inhibitor to phylogenetic H1 influenza viruses with an EC(50) of 98 nM against H1N1 A/Weiss/43 strain and over 1000-fold selectivity against host MDCK cells.
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28
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Molecular simulation study of the binding mechanism of [α-PTi 2W 10O 40] 7- for its promising broad-spectrum inhibitory activity to FluV-A neuraminidase. ACTA ACUST UNITED AC 2010; 55:2497-2504. [PMID: 32214733 PMCID: PMC7089260 DOI: 10.1007/s11434-010-3271-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2009] [Accepted: 03/25/2010] [Indexed: 10/31/2022]
Abstract
Polyoxometalate (POM) has promising antiviral activities. It shows broad-spectrum inhibiting ability, high efficiency, and low toxicity. Experimental assays show that titanium containing polyoxotungstates have anti-influenza-virus activity. In this paper, the binding mechanisms of five isomers of di-Ti-substituted polyoxotungstate, [α-1,2-PTi2W10O40]7- (α-1,2), [α-1,6-PTi2W10O40]7- (α-1,6), [α-1,5-PTi2W10O40]7- (α-1,5), [α-1,4-PTi2W10O40]7- (α-1,4) and [α-1,11-PTi2W10O40]7- (α-1,11), to five subtypes of influenza virus A neuraminidase (FluV-A NA) were investigated in the context of aqueous solution by using molecular docking and molecular dynamics studies. The results show that the isomer α-1,2 is superior to other isomers as a potential inhibitor to neuraminidase. The positively charged arginine residues around the active site of NA could be induced by negatively charged POM to adapt themselves and could form salt bridge interactions and hydrogen bond interactions with POM. The binding free energies of POM/NA complexes range from -5.36 to -8.31 kcal mol-1. The electrostatic interactions are found to be the driving force during the binding process of POM to NA. The conformational analysis shows that POM tends to bind primarily with N1 and N8 at the edge of the active pocket, which causes the conformational change of the pincers structure comprising residue 347 and loop 150. Whereas, the active pockets of N2, N9 and N4 are found to be more spacious, which allows POM to enter into the active pockets directly and anchor there firmly. This study shows that negatively charged ligand as POM could induce the reorganization of the active site of NA and highlights POM as a promising inhibitor to NA despite the ever increasing mutants of NA. Electronic Supplementary Material Supplementary material is available for this article at 10.1007/s11434-010-3271-8 and is accessible for authorized users.
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29
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Therapeutic activity of an anti-idiotypic antibody-derived killer peptide against influenza A virus experimental infection. Antimicrob Agents Chemother 2008; 52:4331-7. [PMID: 18824612 DOI: 10.1128/aac.00506-08] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The in vitro and in vivo activities of a killer decapeptide (KP) against influenza A virus is described, and the mechanisms of action are suggested. KP represents the functional internal image of a yeast killer toxin that proved to exert antimicrobial and anti-human immunodeficiency virus type 1 (HIV-1) activities. Treatment with KP demonstrated a significant inhibitory activity on the replication of two strains of influenza A virus in different cell lines, as evaluated by hemagglutination, hemadsorption, and plaque assays. The complete inhibition of virus particle production and a marked reduction of the synthesis of viral proteins (membrane protein and hemagglutinin, in particular) were observed at a KP concentration of 4 microg/ml. Moreover, KP administered intraperitoneally at a dose of 100 microg/mice once a day for 10 days to influenza A/NWS/33 (H1N1) virus-infected mice improved the survival of the animals by 40% and significantly decreased the viral titers in their lungs. Overall, KP appears to be the first anti-idiotypic antibody-derived peptide that displays inhibitory activity and that has a potential therapeutic effect against pathogenic microorganisms, HIV-1, and influenza A virus by different mechanisms of action.
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30
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Svinarenko TE, Vishnikin AB, Timofeeva MN. Synthesis and physicochemical study of the PMo11(TiO)O 39 5− heteropolyanion. RUSS J INORG CHEM+ 2008. [DOI: 10.1134/s0036023608090039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Nair V, Shu Q. Inosine monophosphate dehydrogenase as a probe in antiviral drug discovery. Antivir Chem Chemother 2008; 18:245-58. [PMID: 18046958 DOI: 10.1177/095632020701800501] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Inosine monophosphate (IMP) dehydrogenase (IMPDH) is a significant enzyme in the purine nucleotide biosynthetic pathway. IMPDH is viewed as an important biological target in the quest for drugs in the antiviral therapeutic area. This review article is focused on the chemistry and biology of IMPDH inhibitors and the use of IMPDH inhibition data as a probe in antiviral drug discovery. Examples of both inosine 5' monophosphate and NAD+ site-directed inhibitors are presented. Correlation of antiviral activities with IMPDH inhibition is discussed.
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Affiliation(s)
- Vasu Nair
- The Center for Drug Discovery, Department of Pharmaceutical and Biomedical Sciences, The University of Georgia, Athens, GA, USA.
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32
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Hurt AC, Ho HT, Barr I. Resistance to anti-influenza drugs: adamantanes and neuraminidase inhibitors. Expert Rev Anti Infect Ther 2007; 4:795-805. [PMID: 17140356 DOI: 10.1586/14787210.4.5.795] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Development of effective drugs for the treatment or prevention of epidemic and pandemic influenza is important in order to reduce its impact. Adamantanes and neuraminidase inhibitors are two classes of anti-influenza drugs available for influenza therapy currently. However, emergence of resistance to these drugs has been detected, which raises concerns regarding their widespread use. In this review, resistance to the adamantanes and neuraminidase inhibitors will be discussed in relation to both epidemic and pandemic influenza viruses.
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Affiliation(s)
- Aeron C Hurt
- World Health Organization Collaborating Centre for Reference and Research on Influenza, Monash University, School of Applied Sciences, 45 Poplar Road, Parkville, Victoria 3052, Australia.
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Mitsui S, Ogata A, Yanagie H, Kasano H, Hisa T, Yamase T, Eriguchi M. Antitumor activity of polyoxomolybdate, [NH3Pri]6[Mo7O24].3H2O, against, human gastric cancer model. Biomed Pharmacother 2006; 60:353-8. [PMID: 16860528 DOI: 10.1016/j.biopha.2006.02.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Accepted: 02/23/2006] [Indexed: 11/21/2022] Open
Abstract
Polyoxometalates are negatively charged inorganic compounds which contain metal ions such as tungsten, molybdenum, vanadium etc. and which make clusters with the surrounding oxygen atoms. [NH3Pri]6[Mo7O24].3H2O (PM-8) was found to be a significant antitumor polyoxomolybdates. It had already been reported that the PM-8 suppressed the growth of Co-4 human colon cancer, MX-1 human breast cancer and OAT human lung cancer xenografted in nude mice. However, the mechanism of the antitumor activity has not been clarified. In this study, the antitumor activity of one of the metal oxide clusters (polyoxometalates), hexabis(isopropylammonium) heptamolybdate trihydrate, [NH3Pri]6[Mo7O24].3H2O (PM-8) were shown in an MTS assay. DNA ladder formation and detection of apoptotic bodies in nuclei were revealed that antitumor activity of PM-8 in MKN45 cells was due to apoptosis. It is concluded that the observation of significant tumor growth suppression of PM-8 in MKN45-bearing mice results from the induction of apoptosis. PM-8 shows promise as a novel anti-cancer agent.
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Affiliation(s)
- S Mitsui
- Chemical Research Laboratory, Tokyo Institute of Technology, R1-21, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Yanagie H, Ogata A, Mitsui S, Hisa T, Yamase T, Eriguchi M. Anticancer activity of polyoxomolybdate. Biomed Pharmacother 2006; 60:349-52. [PMID: 16860529 DOI: 10.1016/j.biopha.2006.06.018] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Accepted: 02/22/2006] [Indexed: 11/20/2022] Open
Abstract
Anticancer polyoxomolybdates have been investigated for medical application of polyoxometalates as discrete cluster anions of metal oxides. [NH3Pri]6[Mo7O24].3H2O (PM-8) has been recognized as one of significant antitumoral polyoxomolybdates. PM-8 had shown the growth suppression against several tumors, for examples, Co-4, human colon cancer, MX-1, human breast cancer, and OAT, human lung cancer. PM-8 showed the tumor growth suppression for MKN-45 human gastric cancer in tumor bearing mice. PM-8 inhibited the cell growth of AsPC-1 which depended on the dose with showing DNA ladder formation and DNA fragmentation, and positive Hoechst staining indicating apoptosis. The ratio of apoptotic cells on flow cytometry analysis were 35%, and 57% with treatment of PM-8 after 48, and 72 h, respectively. One of the anti-tumor activity of PM-8 result from the activation of apoptotic pathway. It is thought that polyoxomolybdates will be applied as a novel anti-tumor agent especially against cancers which are difficult to be treated clinically.
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Affiliation(s)
- H Yanagie
- Department of Intellectual Property, Project of Cancer Metastasis Inhibition, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan.
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35
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Shigeta S, Mori S, Yamase T, Yamamoto N, Yamamoto N. Anti-RNA virus activity of polyoxometalates. Biomed Pharmacother 2006; 60:211-9. [PMID: 16737794 PMCID: PMC7118841 DOI: 10.1016/j.biopha.2006.03.009] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Accepted: 03/07/2006] [Indexed: 11/25/2022] Open
Abstract
The anti-RNA virus activity of polyoxometalates (POM) is reviewed, with a special emphasis on the anti-respiratory virus activities. There are many causative agents of acute viral respiratory infections; and it is rather difficult to identify the relevant agent in a given case by rapid clinical means. During acute progress of infection before the definitive diagnosis is obtained physicians need to prescribe certain broad spectrum anti-viral drugs. A titanium containing polyoxotungstate, PM-523 exhibited potent anti-influenza virus (FluV) A and anti-respiratory syncytial virus (RSV) activities in vitro. Therapeutic effect of FluV A infected mice with aerosol inhalation of PM-523 was proven. A vanadium substituted polyoxotungstate, PM-1001 has antiviral activity against FluV A, RSV, parainfluenza virus (PfluV) type 2, Dengue fiver virus, HIV-1 and SARS coronavirus in vitro. Thus, POMs have been proven to be broad spectrum and non-toxic anti-RNA virus agents in both in vitro and in vivo experiments and are promising candidates for first-line therapeutics in acute respiratory diseases.
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Affiliation(s)
- Shiro Shigeta
- Bureau of Prefectural Hospitals, Fukushima Prefecture, Japan.
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36
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Ogata A, Mitsui S, Yanagie H, Kasano H, Hisa T, Yamase T, Eriguchi M. A novel anti-tumor agent, polyoxomolybdate induces apoptotic cell death in AsPC-1 human pancreatic cancer cells. Biomed Pharmacother 2005; 59:240-4. [PMID: 15908170 DOI: 10.1016/j.biopha.2004.11.008] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2004] [Accepted: 11/26/2004] [Indexed: 10/25/2022] Open
Abstract
Anti-tumoral polyoxomolybdates have been investigated in the course of study of the medical application of polyoxometalates as discrete cluster anions of metal oxides. [NH(3)Pr(i)](6)[Mo(7)O(24)].3H(2)O (PM-8) has been recognized as one of significantly anti-tumoral polyoxomolybdates. PM-8 inhibited the cell growth of human pancreatic cells (AsPC-1) depending on the dose. DNA ladder formation and DNA fragmentation were observed by Hoechst and TUNEL staining and flowcytometry analysis. The ratio of apoptotic cells were 29%, 35%, and 57% with treatment of PM-8 after 24, 48, and 72 h, respectively, which suggested that the anti-tumor activity of PM-8 results from the activation of the apoptotic pathway. Polyoxomolybdates provide promising, novel anti-tumor agent, especially for the treatment of cancers that are difficult to treat.
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Affiliation(s)
- A Ogata
- Chemical Resources Laboratory, Tokyo Institute of Technology, R1-21, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Vignuzzi M, Stone JK, Andino R. Ribavirin and lethal mutagenesis of poliovirus: molecular mechanisms, resistance and biological implications. Virus Res 2005; 107:173-81. [PMID: 15649563 DOI: 10.1016/j.virusres.2004.11.007] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Positive strand RNA virus populations are a collection of similar but genetically different viruses. They exist as viral quasispecies due to the high mutation rates of the low fidelity viral RNA-dependent RNA polymerase (RdRp). It is thought that this genomic heterogeneity is advantageous to the population, allowing for adaptation to rapidly changing environments that present varying types and degrees of selective pressure. However, one consequence of this extensive diversity is the susceptibility to mutagens that further increase sequence variation. Since RNA viruses live at the edge of maximal variability, an increase in the mutation rate is likely to force the virus beyond the tolerable mutation frequency into 'error catastrophe'. One such mutagen, ribavirin, is an antiviral nucleoside analog that is mutagenic to several RNA viruses. Ribavirin is incorporated into the viral genome causing lethal mutagenesis and a subsequent decrease in the specific infectivity. Even so, passaging poliovirus in the presence of low to intermediate concentrations of the drug leads to the emergence of a viral population resistant to the effects of ribavirin. These viruses have a point mutation in the RdRp that increases the overall polymerase fidelity. Interestingly, as predicted by the quasispecies theory, ribavirin resistant viruses are less adaptable, as they are more susceptible to other non-mutagenic antiviral drugs and are highly attenuated in vivo. Here, we review the mechanism of action of ribavirin on poliovirus and other RNA viruses, the possibility for escape via increased fidelity of the viral polymerase, the consequences of this response on viral population dynamics, and the biological implications for the therapeutic use of mutagenic antiviral agents.
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Affiliation(s)
- Marco Vignuzzi
- Department of Microbiology and Immunology, University of California, Mission Bay, Genentech Hall, Box 2280, San Francisco CA 94143-2280, USA
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Yamase T, Ishikawa E, Fukaya K, Nojiri H, Taniguchi T, Atake T. Spin-frustrated (VO)36+-triangle-sandwiching octadecatungstates as a new class of molecular magnets. Inorg Chem 2005; 43:8150-7. [PMID: 15578855 DOI: 10.1021/ic049669n] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Spin-frustrated polyoxometalates, K(11)H[(VO)(3)(SbW(9)O(33))(2)].27H(2)O (1) and K(12)[(VO)(3)(BiW(9)O(33))(2)].29H(2)O (2), containing approximately equilateral and isosceles (VO)(3)(6+)-triangles (V(IV)...V(IV) separation of 5.4-5.5 A) sandwiched by two diamagnetic alpha-B nonatungstate ligands ([SbW(9)O(33)](9)(-) and [BiW(9)O(33)](9)(-)) with approximate D(3)(h) symmetry, are found to show magnetization jumps with distinct hysteresis for the S = (1)/(2) <--> S = (3)/(2) level crossing under fast sweeping pulsed magnetic fields (approximately 10(3) T/s) at T < or = 0.5 K. This unusual phenomenon is attributed to the theoretical prediction of half step magnetization, which is expected for an antiferromagnetic spin triangle with antisymmetrical Dzyaloshinky-Moriya interaction. The degeneracy of the S = (1)/(2) states for 1 is removed by slightly lower symmetry effects of triangular structure for 2. The calorimetry of 1 and 2 shows the heat capacity anomaly at 2 < or = T < or = 20 K which is associated with a thermal excitation from the S = (1)/(2) ground states to the S = (3)/(2) state at zero field. Zero-field splitting energies (5-7 K) between S = (1)/(2) and S = (3)/(2) states for 1 and 2, readily estimated by the level-crossing field for the magnetization, allow us to measure the hyperfine-structural 22 lines due to three equivalent I = (7)/(2) (51)V nuclei, the fine-structural triplet line of the S = (3)/(2) excited state, and the g anisotropy on the high-frequency ESR spectra. The spin-frustrated (VO)(3)(6+)-triangle for 1 and 2 is a good model of the magnetization between pure quantum states S = (1)/(2) and (3)/(2) and provides a new class of single-molecule magnets.
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Affiliation(s)
- Toshihiro Yamase
- Chemical Resources Laboratory, Tokyo Institute of Technology, R1-21, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
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Govorkova EA, Fang HB, Tan M, Webster RG. Neuraminidase inhibitor-rimantadine combinations exert additive and synergistic anti-influenza virus effects in MDCK cells. Antimicrob Agents Chemother 2005; 48:4855-63. [PMID: 15561867 PMCID: PMC529183 DOI: 10.1128/aac.48.12.4855-4863.2004] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
There is insufficient information about combination therapy with approved anti-influenza agents. We tested combinations that paired a neuraminidase (NA) inhibitor (zanamivir, oseltamivir carboxylate, or peramivir) with rimantadine against infection of MDCK cells with H1N1 and H3N2 subtypes of influenza A virus and characterized their mode of interaction. When reduction of extracellular virus was analyzed by individual regression models and three-dimensional representations of the data, all three combinations showed additive and synergistic effects with no cytotoxicity. Maximum synergy against A/New Caledonia/20/99 (H1N1) virus infection was observed with <2.5 microM rimantadine paired with low concentrations of NA inhibitors. All combinations reduced the extracellular yield of A/Panama/2007/99 (H3N2) influenza virus synergistically. However, our findings were different for the cell-associated virus yield. At some drug concentrations, the yield of cell-associated virus was inhibited antagonistically. Therefore, the method of analysis can be a crucial factor in evaluating the interactions of drugs with different mechanisms. We hypothesize that assays based on cell-associated virus yield may underestimate the efficacies of drug combinations that include an NA inhibitor. Taken together, our results suggest that regimens that combine NA inhibitors and rimantadine exert synergistic anti-influenza effects in vitro. These findings provide baseline information for therapeutic testing of the drug combinations in vivo.
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Affiliation(s)
- Elena A Govorkova
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-2794, USA
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Yamase T. Anti-tumor, -viral, and -bacterial activities of polyoxometalates for realizing an inorganic drug. ACTA ACUST UNITED AC 2005. [DOI: 10.1039/b504585a] [Citation(s) in RCA: 273] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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41
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Shigeta S, Mori S, Kodama E, Kodama J, Takahashi K, Yamase T. Broad spectrum anti-RNA virus activities of titanium and vanadium substituted polyoxotungstates. Antiviral Res 2003; 58:265-71. [PMID: 12767474 DOI: 10.1016/s0166-3542(03)00009-3] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Seven polyoxotungstates substituted with vanadium or titanium atoms were examined for their activity against Flaviviridae (Dengue fever virus, DFV), Orthomyxoviridae (influenza virus type A, fluV-A), Paramyxoviridae (respiratory syncytial virus, RSV, parainfluenza virus type 2, PfluV-2 and canine distemper virus, CDV) and Lentiviridae (human immunodeficiency virus type 1, HIV-1) families. Among the seven polyoxotungstates examined, PM-43 [K(5)[SiVW(11)O(40)]], PM-47 [K(7)[BVW(11)O(40)]], and PM-1001 [K(10)Na(VO)(3)(SbW(9)O(33))(2)]26H(2)O contained vanadium. PM-1002 had the same core structure of (VO)(3)(SbW(9)O(33))(2) as PM-1001; however, three V atoms of PM-1001 consisted of two V(IV) and one V(V) and those of PM-1002 consisted of three V(IV). On the other hand, PM-518 [[Et(2)NH(2)](7)[PTi(2)W(10)O(40)]], PM-520 [Pri(2)NH(2)](5)[PTiW(11)O(40)] and PM-523 [PriNH(3)](6)H[PTi(2)W(10)O(38)(O(2))(2)]H(2)O all contained titanium. All compounds showed broad spectrum antiviral activity against all viruses examined except for PMs-43, -518 and -523 which did not exhibit inhibitory activity at >/=50 microM against PfluV-2, CDV and DFV, respectively. All compounds were inhibitory against HIV replication at an EC(50) of less than 2.0 microM. Among them, PMs-1001 and -1002 showed the most potent inhibition. The compounds were not toxic for MDCK, HEp-2 and Vero cells at a concentration of 200 microM. For the exponentially growing MT-4 cells, the vanadium containing polyoxometalates (PMs-43, 47, 1001, 1002) showed toxicity at concentrations between 41 and 47 microM. On the other hand, titanium containing polyoxometalates (PMs-518, -520, -523) were not toxic at 100 microM. The mechanism of anti-HIV action of PM-1001 was analyzed: it affected the binding of HIV to the cell membrane and syncytium formation between HIV-infected and uninfected cells.
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Affiliation(s)
- Shibro Shigeta
- Department of Microbiology, Fukushima Medical University School of Medicine, 1 Hikarigaoka, 960-1295, Fukushima, Japan.
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Dan K, Miyashita K, Seto Y, Fujita H, Yamase T. The memory effect of heteropolyoxotungstate (PM-19) pretreatment on infection by herpes simplex virus at the penetration stage. Pharmacol Res 2002; 46:357-61. [PMID: 12361699 DOI: 10.1016/s1043661802001706] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The keggin-type heteropolyoxotungstate K(7)[PTi(2)W(10)O(40)].6H(2)O (PM-19) is a potent polyoxometalate (PM) inhibitor of the replication of herpes simplex virus (HSV). Pretreatment of Vero cells with PM-19 prior to HSV-2 infection enhanced the antiviral potency of PM-19 almost 10-fold compared with treatment of the cells only after infection. The pretreatment effect of PM-19 is called "the memory effect". The memory effect was reflected by inhibition of plaque formation and decrease of intracellular virus DNA quantity, and was strongest when PM-19 was present during the penetration stage of HSV-2 infection. The effect was maintained under conditions of fusion induced by polyethyleneglycol treatment. This suggests that PM-19 does not act at the fusion stage of infection. Using the infectious center assay method, it was clarified that a second round of infection was inhibited by about 30% in the presence of PM-19 at the penetration stage compared with the virus control in nontreated cells. The inhibition was enhanced to about 60% by PM-19 pretreatment prior to infection. This suggests that PM-19 pretreatment of the cells protects them against HSV-2 infection.
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Affiliation(s)
- Katsuaki Dan
- Institute for Advanced Medical Research, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160, Japan.
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43
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Gao F, Yamase T, Suzuki H. H2O2-based epoxidation of bridged cyclic alkenes with [P{Ti(O2)}2W10O38]7− in monophasic systems: active site and kinetics. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1381-1169(01)00445-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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44
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Sudo K, Yoshida K, Konno K, Ninomiya S, Hibino SM, Shigeta S, Yokota T. Pharmacokinetics of a benzodithiin (RD3-0028) following aerosol treatment in rat. Xenobiotica 2002; 32:19-27. [PMID: 11820507 DOI: 10.1080/00498250110079158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
1. RD3-0028, a benzodithiin compound, has potent antiviral activity against respiratory syncytial virus (RSV) in cell culture. The compound also inhibits growth of RSV and improves pathologic changes of interstitial pneumonia in the immunosuppressed mouse when delivered by small-particle aerosol. 2. In the present study, the absorption, distribution and excretion of 14C-RD3-0028 were compared in rat following either a single aerosol treatment or oral administration. 3. The plasma concentration was maintained at the same level from 5 min to 1 h, and decreased with a half-life of 2.2 +/- 0.1 h for 1-8 h. 4. The excretion of radioactivity in the urine and faeces at 24 h after aerosol treatment was 89.3 and 4.5%, respectively, indicating that almost all the radioactivity was rapidly excreted in the urine. The excretion of total radioactivity was 98.9% within 168 h. 5. The concentrations of radioactivity in the lung and trachea following aerosol treatment were higher than those in other tissues, and were detected even at 72 h. 6. These results suggest that the aerosol treatment might be useful for delivering RD3-0028 to the respiratory tract of RSV-infected patients.
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Affiliation(s)
- K Sudo
- Rational Drug Design Laboratories, Fukushima, Japan.
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45
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46
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Garuti L, Roberti M, Gentilomi G. Synthesis and antiviral assays of some benzimidazole nucleosides and acyclonucleosides. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2001; 56:815-9. [PMID: 11765032 DOI: 10.1016/s0014-827x(01)01164-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Some benzimidazole nucleosides and acyclonucleosides were synthesized and tested in vitro as antiviral agents. None of them showed significant activity. Replacement of the benzenesulphonyl group at N-1 with the ribofuranosyl moiety or with the acyclovir side-chain was deleterious.
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Affiliation(s)
- L Garuti
- Department of Pharmaceutical Science, University of Bologna, Italy.
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47
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Conti G, Portincasa P, Visalli S, Chezzi C. Inhibition by prostaglandin PGA1 on the multiplication of influenza virus is a dose-dependent effect. Virus Res 2001; 75:43-57. [PMID: 11311427 DOI: 10.1016/s0168-1702(01)00221-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclopentenone prostaglandins (PGs), are strong inhibitors of the multiplicative cycle of a wide variety of enveloped RNA and DNA viruses. Their antiviral activity is generally associated with alterations in the synthesis or maturation of specific virus proteins. In this report, we describe the effect of cyclopentenone PGA1 on the replication of influenza A virus Ulster 73 in LLC-MK2 cells. PGA1 was found to inhibit viral replication in a dose-dependent fashion and virus particle yield was reduced at a PGA1 concentration, which did not suppress protein synthesis in mock-infected cells. The kinetic of late viral protein synthesis was delayed in PGA1-treated cells till 10 h post-infection; after that period, viral polypeptide synthesis appeared to be similar in PGA1-treated as well as untreated cells both infected by Ulster 73 virus. This finding suggests that PGA1 might interfere with one or more events in the viral multiplicative cycle such as protein synthesis and assembly, correct insertion of virus polypeptides into the cell membrane and, or maturation of Ulster 73 virion particles. In particular, inhibition of viral replication in LLC-MK2 cells by PGA1 is accompanied by the induction of a cellular polypeptide of 70K molecular weight. We identified this cell protein as a heat shock protein (HSP) related to the inducible isoform of HSP 70, a polypeptide of 72K molecular weight. Induction of this polypeptide by PGA1 was found to be dose-dependent and a substantial accumulation could be seen at a PGA1 concentration that did not inhibit cell protein synthesis in uninfected cells. HSP 70 synthesis started after the beginning of PGA1 treatment and remained at the same level for at least 10 h, leading us to hypothesize that the delay of production of late Ulster 73 proteins could be the consequence of HSP 70 synthesis. These results suggest that HSP 70 could play a role in the antiviral activity of cyclopentenone PGA1 in LLC-MK2 cells.
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Affiliation(s)
- G Conti
- Department of Pathology and Laboratory Medicine, University of Parma, Microbiology Section, Medical School, 43100, Parma, Italy.
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48
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Yoshimoto J, Yagi S, Ono J, Sugita K, Hattori N, Fujioka T, Fujiwara T, Sugimoto H, Hashimoto N. Development of anti-influenza drugs: II. Improvement of oral and intranasal absorption and the anti-influenza activity of stachyflin derivatives. J Pharm Pharmacol 2000; 52:1247-55. [PMID: 11092569 DOI: 10.1211/0022357001777225] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The in-vivo anti-influenza-virus activity of Stachyflin derivatives (III and its phosphate ester, III-Phos), a new class of haemagglutinin fusion inhibitor, and the improvement of their absorption after oral or intranasal administration were studied in mice, rats, and ferrets. The absorption of III in PEG 4000 and III-Phos aqueous solution increased about three and four fold in AUC after oral administration to uninfected mice compared with that of 0.5% HPMC (hydroxypropyl-methylcellulose) suspension. Using a mouse influenza virus infection model, significant anti-influenza-virus activity was observed in infected mice treated orally with these compounds dissolved in PEG 4000 or distilled water, respectively, but not in mice treated with 0.5% HPMC. The in-vivo anti-influenza-virus activity in ferrets, a good model for influenza virus infection in man, was also studied. Although the concentration of III in plasma was above the IC50 against the influenza virus strain used for 6h after the oral administration of III in PEG 400 to uninfected ferrets, no in-vivo anti-influenza-virus activity was observed at the same dosage given 4 times daily for 3 days. The intranasal administration of III-Phos, which was expected to have a more notable in-vivo anti-influenza-virus activity, was examined. III-Phos, whose intranasal absorption had been improved by the modification of III with phosphate ester in rats, inhibited viral replication in the nasal cavity and suppressed influenza-virus-induced fever when administered intranasally to infected ferrets. This study demonstrates that intranasally administered compounds with anti-influenza-virus activity must permeate the nasal membranes to produce their anti-influenza-virus effect.
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Affiliation(s)
- J Yoshimoto
- Shionogi Research Laboratories, Shionogi & Co. Ltd, Osaka, Japan
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49
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Garuti L, Roberti M, Gentilomi G. Synthesis and antiviral assays of some 2-substituted benzimidazole-N-carbamates. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2000; 55:35-9. [PMID: 10755229 DOI: 10.1016/s0014-827x(99)00117-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Some 2-substituted benzimidazole-N-carbamates were synthesized and tested in vitro for antiviral activity. Two derivatives were active at noncytotoxic concentrations. The results confirmed the importance of the substituents at the 2-position of benzimidazole; an isopropylcarboxamide group led to the best activity.
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Affiliation(s)
- L Garuti
- Dipartimento di Scienze Farmaceutiche, Università di Bologna, Italy
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50
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Pica F, Palamara AT, Rossi A, De Marco A, Amici C, Santoro MG. Delta(12)-prostaglandin J(2) is a potent inhibitor of influenza A virus replication. Antimicrob Agents Chemother 2000; 44:200-4. [PMID: 10602750 PMCID: PMC89655 DOI: 10.1128/aac.44.1.200-204.2000] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
9-Deoxy-Delta(9),Delta(12)-13,14-dihydro-prostaglandin D(2) (Delta(12)-PGJ(2)), a natural cyclopentenone metabolite of prostaglandin D(2), is shown to possess therapeutic efficacy against influenza A virus A/PR8/34 (H1N1) infection in vitro and in vivo. The results indicate that the antiviral activity is associated with induction of cytoprotective heat shock proteins and suggest novel strategies for treatment of influenza virus infection.
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Affiliation(s)
- F Pica
- Departments of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
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