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Petronek MS, Allen BG, Luthe G, Stolwijk JM. Polyoxometalate Nanoparticles as a Potential Glioblastoma Therapeutic via Lipid-Mediated Cell Death. Int J Mol Sci 2022; 23:ijms23158263. [PMID: 35897839 PMCID: PMC9332768 DOI: 10.3390/ijms23158263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/22/2022] [Accepted: 07/23/2022] [Indexed: 12/04/2022] Open
Abstract
Polyoxometalate nanoparticles (POMs) are a class of compounds made up of multiple transition metals linked together using oxygen atoms. POMs commonly include group 6 transition metals, with two of the most common forms using molybdenum and tungsten. POMs are suggested to exhibit antimicrobial effects. In this study, we developed two POM preparations to study anti-cancer activity. We found that Mo-POM (NH4)Mo7O24) and W-POM (H3PW12O40) have anti-cancer effects on glioblastoma cells. Both POMs induced morphological changes marked by membrane swelling and the presence of multinucleated cells that may indicate apoptosis induction along with impaired cell division. We also observed significant increases in lipid oxidation events, suggesting that POMs are redox-active and can catalyze detrimental oxidation events in glioblastoma cells. Here, we present preliminary indications that molybdenum polyoxometalate nanoparticles may act like ferrous iron to catalyze the oxidation of phospholipids. These preliminary results suggest that Mo-POMs (NH4)Mo7O24) and W-POMs (H3PW12O40) may warrant further investigation into their utility as adjunct cancer therapies.
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Affiliation(s)
- Michael S. Petronek
- Department of Radiation Oncology, Division of Free Radical and Radiation Biology, The University of Iowa, Iowa City, IA 52242-1181, USA
- Correspondence: (M.S.P.); (J.M.S.); Tel.: +1-(319)-356-8019 (M.S.P.)
| | - Bryan G. Allen
- Spheres4Life B.V., 7521 Enschede, The Netherlands; (B.G.A.); (G.L.)
| | - Gregor Luthe
- Spheres4Life B.V., 7521 Enschede, The Netherlands; (B.G.A.); (G.L.)
| | - Jeffrey M. Stolwijk
- Department of Radiation Oncology, Division of Free Radical and Radiation Biology, The University of Iowa, Iowa City, IA 52242-1181, USA
- Spheres4Life B.V., 7521 Enschede, The Netherlands; (B.G.A.); (G.L.)
- Correspondence: (M.S.P.); (J.M.S.); Tel.: +1-(319)-356-8019 (M.S.P.)
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2
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Xu W, Cao JF, Lin YN, Shu Y, Wang JH. Functionalized polyoxometalate microspheres ensure selective adsorption of phosphoproteins and glycoproteins. Chem Commun (Camb) 2021; 57:3367-3370. [PMID: 33683273 DOI: 10.1039/d1cc00325a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Lacunary polyoxometalate (POM), [PW9O34]9-, grafts with a boronic acid group attached via an organosilane bridge assemble into microspheres, PW9-Si-APBA. The oxygen-rich and hydrophilic surface of POM facilitates the binding of phosphate groups in phosphoproteins and glycans in glycoproteins. While the metal-oxo in POM provides π-π interactions with the phosphate groups of phosphoproteins, the boronic acid group specifically binds to glycoproteins via the cis-diols of glycans. Therefore, these multi-driving forces ensure the selective adsorption of phosphoproteins and glycoproteins by PW9-Si-APBA microspheres in biological sample matrixes, even in the presence of very high protein abundance, i.e., BSA, at mass ratio of β-ca/IgG/OVA/BSA = 1 : 1 : 1 : 200.
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Affiliation(s)
- Wang Xu
- Department of Chemistry, Northeastern University, Box 332, Shenyang 110819, China.
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3
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Lu F, Wang M, Li N, Tang B. Polyoxometalate-Based Nanomaterials Toward Efficient Cancer Diagnosis and Therapy. Chemistry 2021; 27:6422-6434. [PMID: 33314442 DOI: 10.1002/chem.202004500] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/26/2020] [Indexed: 12/11/2022]
Abstract
As an emerging class of inorganic metal oxides, organically functionalized polyoxometalates (POMs) or POM-based nanohybrids have been demonstrated promising potential for the inhibition of various cancer types by the virtue of their diversity in structures and significantly reduced toxicity. This contribution summarizes the latest achievement of POM-based nanomaterials in cancer diagnosis and various therapeutics to put forward our fundamental viewpoints on the design principles of modified POMs based on their application. In addition, major challenges and perspectives in this field are also discussed. We expect that this review will provide a valuable and systematic reference for the further development of POM-based nanomaterials.
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Affiliation(s)
- Fei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical, Imaging in Universities of Shandong, Institute of Molecular and Nanoscience, Shandong Normal University, Jinan, 250014, P. R. China
| | - Mengzhen Wang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical, Imaging in Universities of Shandong, Institute of Molecular and Nanoscience, Shandong Normal University, Jinan, 250014, P. R. China
| | - Na Li
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical, Imaging in Universities of Shandong, Institute of Molecular and Nanoscience, Shandong Normal University, Jinan, 250014, P. R. China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical, Imaging in Universities of Shandong, Institute of Molecular and Nanoscience, Shandong Normal University, Jinan, 250014, P. R. China
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4
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Joshi A, Gupta R, Singh B, Sharma D, Singh M. Effective inhibitory activity against MCF-7, A549 and HepG2 cancer cells by a phosphomolybdate based hybrid solid. Dalton Trans 2020; 49:7069-7077. [DOI: 10.1039/d0dt01042a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A novel P2Mo5 cluster based hybrid solid [{4,4′-H2bpy}{4,4′-Hbpy}2{H2P2Mo5O23}]·5H2O with effective anti-proliferation activity against MCF-7, HepG2 and A549 cancer cells comparable with a routinely used chemotherapeutic agent, methotrexate (MTX).
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Affiliation(s)
- Arti Joshi
- Institute of Nano Science and Technology
- Mohali-160062
- India
| | - Ruby Gupta
- Institute of Nano Science and Technology
- Mohali-160062
- India
| | - Bharti Singh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Deepika Sharma
- Institute of Nano Science and Technology
- Mohali-160062
- India
| | - Monika Singh
- Institute of Nano Science and Technology
- Mohali-160062
- India
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5
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Bijelic A, Aureliano M, Rompel A. Polyoxometalates as Potential Next-Generation Metallodrugs in the Combat Against Cancer. Angew Chem Int Ed Engl 2019; 58:2980-2999. [PMID: 29893459 PMCID: PMC6391951 DOI: 10.1002/anie.201803868] [Citation(s) in RCA: 305] [Impact Index Per Article: 61.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 02/05/2023]
Abstract
Polyoxometalates (POMs) are an emerging class of inorganic metal oxides, which over the last decades demonstrated promising biological activities by the virtue of their great diversity in structures and properties. They possess high potential for the inhibition of various tumor types; however, their unspecific interactions with biomolecules and toxicity impede their clinical usage. The current focus of the field of biologically active POMs lies on organically functionalized and POM-based nanocomposite structures as these hybrids show enhanced anticancer activity and significantly reduced toxicity towards normal cells in comparison to unmodified POMs. Although the antitumor activity of POMs is well documented, their mechanisms of action are still not well understood. In this Review, an overview is given of the cytotoxic effects of POMs with a special focus on POM-based hybrid and nanocomposite structures. Furthermore, we aim to provide proposed mode of actions and to identify molecular targets. POMs are expected to develop into the next generation of anticancer drugs that selectively target cancer cells while sparing healthy cells.
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Affiliation(s)
- Aleksandar Bijelic
- Universität WienFakultät für ChemieInstitut für Biophysikalische ChemieAlthanstraße 141090WienAustria
| | - Manuel Aureliano
- Universidade do AlgarveFaculdade de Ciências e Tecnologia (FCT), CCMar8005-139FaroPortugal
| | - Annette Rompel
- Universität WienFakultät für ChemieInstitut für Biophysikalische ChemieAlthanstraße 141090WienAustria
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6
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Van Rompuy LS, Parac-Vogt TN. Interactions between polyoxometalates and biological systems: from drug design to artificial enzymes. Curr Opin Biotechnol 2018; 58:92-99. [PMID: 30529815 DOI: 10.1016/j.copbio.2018.11.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/20/2018] [Indexed: 12/11/2022]
Abstract
Polyoxometalates have long been studied in a variety of biological applications. Interactions between the highly charged POM molecules and biological molecules frequently occur through hydrogen-bonding and electrostatic interactions. Tellurium-centred Anderson-Evans POMs show exceptional promise as crystallization agents, while acidic and metal-substituted POMs may provide interesting alternatives to enzymes in proteomics applications. While POMs also show interesting results in a number of medicinal applications, for example as anti-amyloid agents for the treatment of Alzheimer's disease and as anti-tumoral agents, their use is often impeded by their toxicity. Many recent studies have therefore focussed on POM-functionalization to reduce toxicity and increase activity by addition of biological targeting molecules.
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Affiliation(s)
- Laura S Van Rompuy
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Tatjana N Parac-Vogt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.
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7
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Samart N, Arhouma Z, Kumar S, Murakami HA, Crick DC, Crans DC. Decavanadate Inhibits Mycobacterial Growth More Potently Than Other Oxovanadates. Front Chem 2018; 6:519. [PMID: 30515375 PMCID: PMC6255961 DOI: 10.3389/fchem.2018.00519] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 10/09/2018] [Indexed: 01/06/2023] Open
Abstract
51V NMR spectroscopy is used to document, using speciation analysis, that one oxometalate is a more potent growth inhibitor of two Mycobacterial strains than other oxovanadates, thus demonstrating selectivity in its interaction with cells. Historically, oxometalates have had many applications in biological and medical studies, including study of the phase-problem in X-ray crystallography of the ribosome. The effect of different vanadate salts on the growth of Mycobacterium smegmatis (M. smeg) and Mycobacterium tuberculosis (M. tb) was investigated, and speciation was found to be critical for the observed growth inhibition. Specifically, the large orange-colored sodium decavanadate (V10O 28 6 - ) anion was found to be a stronger inhibitor of growth of two mycobacterial species than the colorless oxovanadate prepared from sodium metavanadate. The vanadium(V) speciation in the growth media and conversion among species under growth conditions was monitored using 51V NMR spectroscopy and speciation calculations. The findings presented in this work is particularly important in considering the many applications of polyoxometalates in biological and medical studies, such as the investigation of the phase-problem in X-ray crystallography for the ribosome. The findings presented in this work investigate the interactions of oxometalates with other biological systems.
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Affiliation(s)
- Nuttaporn Samart
- Department of Chemistry, Colorado State University, Fort Collins, CO, United States
- Department of Chemistry, Rajabhat Rajanagarindra University, Chachoengsao, Thailand
| | - Zeyad Arhouma
- Department of Chemistry, Colorado State University, Fort Collins, CO, United States
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO, United States
| | - Santosh Kumar
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, United States
| | - Heide A. Murakami
- Department of Chemistry, Colorado State University, Fort Collins, CO, United States
| | - Dean C. Crick
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO, United States
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, United States
| | - Debbie C. Crans
- Department of Chemistry, Colorado State University, Fort Collins, CO, United States
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO, United States
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8
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Bijelic A, Aureliano M, Rompel A. Im Kampf gegen Krebs: Polyoxometallate als nächste Generation metallhaltiger Medikamente. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803868] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Aleksandar Bijelic
- Universität WienFakultät für ChemieInstitut für Biophysikalische Chemie Althanstraße 14 1090 Wien Österreich
| | - Manuel Aureliano
- Universidade do AlgarveFaculdade de Ciências e Tecnologia (FCT), CCMar 8005-139 Faro Portugal
| | - Annette Rompel
- Universität WienFakultät für ChemieInstitut für Biophysikalische Chemie Althanstraße 14 1090 Wien Österreich
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9
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Croce M, Conti S, Maake C, Patzke GR. Nanocomposites of Polyoxometalates and Chitosan-Based Polymers as Tuneable Anticancer Agents. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800268] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Matteo Croce
- Department of Chemistry; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Simona Conti
- Institute of Anatomy; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Caroline Maake
- Institute of Anatomy; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Greta R. Patzke
- Department of Chemistry; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland
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10
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Wang X, Wang J, Zhang W, Li B, Zhu Y, Hu Q, Yang Y, Zhang X, Yan H, Zeng Y. Inhibition of Human Immunodeficiency Virus Type 1 Entry by a Keggin Polyoxometalate. Viruses 2018; 10:v10050265. [PMID: 29772712 PMCID: PMC5977258 DOI: 10.3390/v10050265] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/11/2018] [Accepted: 05/14/2018] [Indexed: 12/20/2022] Open
Abstract
Here, we report the anti-human immunodeficiency virus (HIV) potency and underlying mechanisms of a Keggin polyoxometalate (PT-1, K6HPTi2W10O40). Our findings showed that PT-1 exhibited highly potent effects against a diverse group of HIV type 1 (HIV-1) strains and displayed low cytotoxicity and genotoxicity. The time-addition assay revealed that PT-1 acted at an early stage of infection, and these findings were supported by the observation that PT-1 had more potency against Env-pseudotyped virus than vesicular stomatitis virus glycoprotein (VSVG) pseudotyped virus. Surface plasmon resonance binding assays and flow cytometry analysis showed that PT-1 blocked the gp120 binding site in the CD4 receptor. Moreover, PT-1 bound directly to gp41 NHR (N36 peptide), thereby interrupting the core bundle formation of gp41. In conclusion, our data suggested that PT-1 may be developed as a new anti-HIV-1 agent through its effects on entry inhibition.
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Affiliation(s)
- Xiaoli Wang
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Jiao Wang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
| | - Wenmei Zhang
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Boye Li
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Ying Zhu
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Qin Hu
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Yishu Yang
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Xiaoguang Zhang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
| | - Hong Yan
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Yi Zeng
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
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11
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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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12
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Sun T, Cui W, Yan M, Qin G, Guo W, Gu H, Liu S, Wu Q. Target Delivery of a Novel Antitumor Organoplatinum(IV)-Substituted Polyoxometalate Complex for Safer and More Effective Colorectal Cancer Therapy In Vivo. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:7397-7404. [PMID: 27309631 DOI: 10.1002/adma.201601778] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 05/11/2016] [Indexed: 06/06/2023]
Abstract
An inactive organoplatinum(IV)-substituted polyoxometalate is developed as an efficient and nontoxic prodrug with significant potential for treating human colorectal cancers. Further encapsulation of Pt(IV) -PW11 with DSPE-PEG2000 nanoparticles (NPs) enables targeted delivery and controlled release of inactive prodrug. Such Pt(IV) -PW11 -DSPE-PEG2000 NPs are highly efficient in inhibiting cellular growth of HT29 cells and treating human colorectal cancer in mice, superior to classic cisplatin.
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Affiliation(s)
- Tiedong Sun
- Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin, 150080, P. R. China
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Wei Cui
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Mei Yan
- Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Geng Qin
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Wei Guo
- Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin, 150080, P. R. China
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Hongxi Gu
- Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin, 150080, P. R. China
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Shaoqin Liu
- Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin, 150080, P. R. China.
| | - Qiong Wu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, P. R. China.
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Dianat S, Bordbar AK, Tangestaninejad S, Zarkesh-Esfahani SH, Habibi P, Abbasi Kajani A. ctDNA interaction of Co-containing Keggin polyoxomolybdate and in vitro antitumor activity of free and its nano-encapsulated derivatives. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-0906-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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In vitro antitumor activity of free and nano-encapsulated Na5[PMo10V2O40]·nH2O and its binding properties with ctDNA by using combined spectroscopic methods. J Inorg Biochem 2015; 152:74-81. [PMID: 26360100 DOI: 10.1016/j.jinorgbio.2015.08.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 08/14/2015] [Accepted: 08/20/2015] [Indexed: 11/21/2022]
Abstract
Free and nanosized starch and lipid encapsulated Na5[PMo10V2O40]·nH2O complexes (abbreviated as PMoV, SEP and LEP, respectively) have been prepared and structurally characterized by Fourier transform infrared (FT-IR) spectroscopy, inductively coupled plasma (ICP) analysis, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images. The results show that the PMoV retains its parent structure after encapsulation by starch and lipid nanoparticles. The in vitro antitumor activity of PMoV in its free and nano-encapsulated forms was investigated using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide (MTT) assay that was carried out on two types of human cancer cells, MCF-7 (breast cancer cells) and HEK-293 (Human Embryonic Kidney). The results represent the enhancement of cell penetration and antitumor activity of PMoV due to its encapsulation in starch or lipid nanoparticles. However, this observed enhancement for the lipid relative to the starch nanocapsule can be attributed to its smaller size. In order to investigate the molecular nature of antitumor activity, the binding properties of PMoV with calf thymus DNA (ctDNA) were also comprehensively evaluated using UV-vis absorption spectroscopy, fluorescence quenching and fluorescence Scatchard plots. The results rule out the intercalating binding mode and propose the groove or outside stacking binding for PMoV. However, a biphasic binding behavior that is due to the change in the binding mode was observed by varying of [PMoV]/[ctDNA] mole ratio. The results of cell culture assay and DNA binding experiments represent that the rate of cell penetration is more important than DNA binding affinity in the antitumor activity for POM.
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15
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Satyanarayana VSV, Reddy PG, Pradeep CP. Synthesis, structure, self-assembly and genotoxicity evaluation of a series of Mn-Anderson cluster based polyoxometalate–organic hybrids. RSC Adv 2015. [DOI: 10.1039/c5ra07581e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new series of POM–organic hybrids have been developed which show less genotoxicity compared to the parent polyoxometalate cluster.
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16
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In VitroAntitumor Activity of a Keggin Vanadium-Substituted Polyoxomolybdate and Its ctDNA Binding Properties. J CHEM-NY 2015. [DOI: 10.1155/2015/753751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
A Keggin vanadium-substituted polyoxomolybdate, K5PMo10V2O40(PMo10V2), has been synthesized and it’s antitumor effect against Hela cells was investigated. The calf thymus DNA (ctDNA) binding ability of PMo10V2was also evaluated by UV-Vis absorption spectra and fluorescence spectra. The identity and high purity of PMo10V2was confirmed by elemental analysis and IR analysis. And the antitumor activity test of PMo10V2was carried out on Hela cancer cells line by MTT assay. The results of MTT assay show that PMo10V2significantly reduced the viability of Hela cells in a dose-dependent manner and exhibited stronger inhibitory activity against Hela cells at an IC50of 800 μg/mL, which is more effective than the positive control, 5-Fu(P<0.05). The results of the UV-Vis absorption spectra and fluorescence spectra indicated the groove or outside stacking binding between PMo10V2and ctDNA. These results show that the antitumor activity of PMo10V2may be caused by the interactions between DNA and PMo10V2.
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17
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Mbita Z, Hull R, Dlamini Z. Human immunodeficiency virus-1 (HIV-1)-mediated apoptosis: new therapeutic targets. Viruses 2014; 6:3181-227. [PMID: 25196285 PMCID: PMC4147692 DOI: 10.3390/v6083181] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 06/12/2014] [Accepted: 07/08/2014] [Indexed: 12/18/2022] Open
Abstract
HIV has posed a significant challenge due to the ability of the virus to both impair and evade the host’s immune system. One of the most important mechanisms it has employed to do so is the modulation of the host’s native apoptotic pathways and mechanisms. Viral proteins alter normal apoptotic signaling resulting in increased viral load and the formation of viral reservoirs which ultimately increase infectivity. Both the host’s pro- and anti-apoptotic responses are regulated by the interactions of viral proteins with cell surface receptors or apoptotic pathway components. This dynamic has led to the development of therapies aimed at altering the ability of the virus to modulate apoptotic pathways. These therapies are aimed at preventing or inhibiting viral infection, or treating viral associated pathologies. These drugs target both the viral proteins and the apoptotic pathways of the host. This review will examine the cell types targeted by HIV, the surface receptors exploited by the virus and the mechanisms whereby HIV encoded proteins influence the apoptotic pathways. The viral manipulation of the hosts’ cell type to evade the immune system, establish viral reservoirs and enhance viral proliferation will be reviewed. The pathologies associated with the ability of HIV to alter apoptotic signaling and the drugs and therapies currently under development that target the ability of apoptotic signaling within HIV infection will also be discussed.
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Affiliation(s)
- Zukile Mbita
- College of Agriculture and Environmental Sciences, University of South Africa, Florida Science Campus, C/o Christiaan de Wet and Pioneer Avenue P/Bag X6, Johannesburg 1710, South Africa.
| | - Rodney Hull
- College of Agriculture and Environmental Sciences, University of South Africa, Florida Science Campus, C/o Christiaan de Wet and Pioneer Avenue P/Bag X6, Johannesburg 1710, South Africa.
| | - Zodwa Dlamini
- College of Agriculture and Environmental Sciences, University of South Africa, Florida Science Campus, C/o Christiaan de Wet and Pioneer Avenue P/Bag X6, Johannesburg 1710, South Africa.
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In vitro antitumor activity of parent and nano-encapsulated mono cobalt-substituted Keggin polyoxotungstate and its ctDNA binding properties. Chem Biol Interact 2014; 215:25-32. [DOI: 10.1016/j.cbi.2014.02.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 01/28/2014] [Accepted: 02/26/2014] [Indexed: 10/25/2022]
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Synthesis, Crystal Structure and Antitumor Activities of a New Cobalt-containing Tungstoantimonate Na9[{Na(H2O)2}3{Co(H2O)}3(α-B-SbW9O33)2]·28H2O. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2013. [DOI: 10.1080/10601325.2014.850621] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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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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Yang H, Nkeze J, Zhao RY. Effects of HIV-1 protease on cellular functions and their potential applications in antiretroviral therapy. Cell Biosci 2012; 2:32. [PMID: 22971934 PMCID: PMC3490751 DOI: 10.1186/2045-3701-2-32] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Accepted: 08/31/2012] [Indexed: 11/10/2022] Open
Abstract
Human Immunodeficiency Virus Type 1 (HIV-1) protease inhibitors (PIs) are the most potent class of drugs in antiretroviral therapies. However, viral drug resistance to PIs could emerge rapidly thus reducing the effectiveness of those drugs. Of note, all current FDA-approved PIs are competitive inhibitors, i.e., inhibitors that compete with substrates for the active enzymatic site. This common inhibitory approach increases the likelihood of developing drug resistant HIV-1 strains that are resistant to many or all current PIs. Hence, new PIs that move away from the current target of the active enzymatic site are needed. Specifically, allosteric inhibitors, inhibitors that prohibit PR enzymatic activities through non-competitive binding to PR, should be sought. Another common feature of current PIs is they were all developed based on the structure-based design. Drugs derived from a structure-based strategy may generate target specific and potent inhibitors. However, this type of drug design can only target one site at a time and drugs discovered by this method are often associated with strong side effects such as cellular toxicity, limiting its number of target choices, efficacy, and applicability. In contrast, a cell-based system may provide a useful alternative strategy that can overcome many of the inherited shortcomings associated with structure-based drug designs. For example, allosteric PIs can be sought using a cell-based system without considering the site or mechanism of inhibition. In addition, a cell-based system can eliminate those PIs that have strong cytotoxic effect. Most importantly, a simple, economical, and easy-to-maintained eukaryotic cellular system such as yeast will allow us to search for potential PIs in a large-scaled high throughput screening (HTS) system, thus increasing the chances of success. Based on our many years of experience in using fission yeast as a model system to study HIV-1 Vpr, we propose the use of fission yeast as a possible surrogate system to study the effects of HIV-1 protease on cellular functions and to explore its utility as a HTS system to search for new PIs to battle HIV-1 resistant strains.
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Affiliation(s)
- Hailiu Yang
- Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, 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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Sha J, Zhang Y, Liang L, Qiu H, Liu M. pH-Controlled syntheses of two hybrids based on octamolybdate and enrofloxacin. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.713101] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jingquan Sha
- a The Provincial Key Laboratory of Biological Medicine Formulation , School of Pharmacy, Jiamusi University , Jiamusi 154007 , P.R. China
| | - Yuhong Zhang
- a The Provincial Key Laboratory of Biological Medicine Formulation , School of Pharmacy, Jiamusi University , Jiamusi 154007 , P.R. China
| | - Liye Liang
- a The Provincial Key Laboratory of Biological Medicine Formulation , School of Pharmacy, Jiamusi University , Jiamusi 154007 , P.R. China
| | - Hongbin Qiu
- a The Provincial Key Laboratory of Biological Medicine Formulation , School of Pharmacy, Jiamusi University , Jiamusi 154007 , P.R. China
| | - Mingyuan Liu
- a The Provincial Key Laboratory of Biological Medicine Formulation , School of Pharmacy, Jiamusi University , Jiamusi 154007 , P.R. China
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Ruhlmann L, Schaming D, Ahmed I, Courville A, Canny J, Thouvenot R. Spectroscopic and Electrochemical Study of the Interconversion and Decomplexation of Cobalt(II) Sandwich Polyoxometalates Based on a Dawson-Type Anion. Inorg Chem 2012; 51:8202-11. [DOI: 10.1021/ic3007603] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laurent Ruhlmann
- Laboratoire de Chimie Physique
(UMR CNRS 8000), Bâtiment 349, Université Paris-Sud 11, 91405 Orsay Cedex, France
- Laboratoire d’Electrochimie
et de Chimie-Physique du Corps
Solide (UMR CNRS 7177), Université de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg, France
| | - Delphine Schaming
- Laboratoire de Chimie Physique
(UMR CNRS 8000), Bâtiment 349, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - Iftikhar Ahmed
- Laboratoire de Chimie Physique
(UMR CNRS 8000), Bâtiment 349, Université Paris-Sud 11, 91405 Orsay Cedex, France
- Laboratoire d’Electrochimie
et de Chimie-Physique du Corps
Solide (UMR CNRS 7177), Université de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg, France
| | - Aimeric Courville
- Laboratoire de Chimie Physique
(UMR CNRS 8000), Bâtiment 349, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - Jacqueline Canny
- Institut Parisien de Chimie Moléculaire
(UMR CNRS 7201), Case courrier 42, Université Pierre et Marie Curie, Univ Paris 06, 4 Place Jussieu,
75252 Paris Cedex, France
| | - René Thouvenot
- Institut Parisien de Chimie Moléculaire
(UMR CNRS 7201), Case courrier 42, Université Pierre et Marie Curie, Univ Paris 06, 4 Place Jussieu,
75252 Paris Cedex, France
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Sha JQ, Liang LY, Yan PF, Li GM, Wang C, Ma DY. Study on ligation of copper complexes of the quinolone antibacterial drugs and octamolybdates POMs. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.09.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Geisberger G, Paulus S, Gyenge EB, Maake C, Patzke GR. Targeted delivery of polyoxometalate nanocomposites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:2808-2814. [PMID: 21953786 DOI: 10.1002/smll.201101264] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Indexed: 05/31/2023]
Abstract
Polyoxometalate/carboxymethyl chitosan nanocomposites with an average diameter of 130 nm are synthesized and labeled with fluorescein isothiocyanate (FITC) for a combined drug-carrier and cellular-monitoring approach. [Eu(β(2) -SiW(11) O(39) )(2) ](13-) /CMC nanospheres as a representative example do not display cytotoxicity for POM concentrations up to 2 mg mL(-1) . Cellular uptake of fluoresecently labelled {EuSiW(11) O(39) }/FITC-CMC nanoparticles is monitored with confocal laser scanning microscopy. Nanoparticle uptake occurs after incubation times of around 1 h and no cyctotoxic effects are observed upon prolonged treatment. The preferential location of the POM/CMC nanocomposites in the perinuclear region is furthermore verified with transmission electron microscopy investigations on unlabeled nanoparticles. Therefore, this approach is a promising dual strategy for the safe cellular transfer and monitoring of bioactive POMs.
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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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27
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28
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Narasimhan K, Pillay S, Bin Ahmad NR, Bikadi Z, Hazai E, Yan L, Kolatkar PR, Pervushin K, Jauch R. Identification of a polyoxometalate inhibitor of the DNA binding activity of Sox2. ACS Chem Biol 2011; 6:573-81. [PMID: 21344919 DOI: 10.1021/cb100432x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aberrant expression of transcription factors is a frequent cause of disease, yet drugs that modulate transcription factor protein-DNA interactions are presently unavailable. To this end, the chemical tractability of the DNA binding domain of the stem cell inducer and oncogene Sox2 was explored in a high-throughput fluorescence anisotropy screen. The screening revealed a Dawson polyoxometalate (K(6)[P(2)Mo(18)O(62)]) as a direct and nanomolar inhibitor of the DNA binding activity of Sox2. The Dawson polyoxometalate (Dawson-POM) was found to be selective for Sox2 and related Sox-HMG family members when compared to unrelated paired and zinc finger DNA binding domains. [(15)N,(1)H]-Transverse relaxation optimized spectroscopy (TROSY) experiments coupled with docking studies suggest an interaction site of the POM on the Sox2 surface that enabled the rationalization of its inhibitory activity. The unconventional molecular scaffold of the Dawson-POM and its inhibitory mode provides strategies for the development of drugs that modulate transcription factors.
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Affiliation(s)
- Kamesh Narasimhan
- Laboratory for Structural Biochemistry, Genome Institute of Singapore, Singapore 138672
- Department of Biological Sciences, National University of Singapore, Singapore 117543
| | - Shubhadra Pillay
- School of Biological sciences, Nanyang Technological University, Singapore 637551
| | | | - Zsolt Bikadi
- Virtua Drug Research and Development Ltd., Budapest 1015, Hungary
| | - Eszter Hazai
- Virtua Drug Research and Development Ltd., Budapest 1015, Hungary
| | - Li Yan
- School of Biological sciences, Nanyang Technological University, Singapore 637551
| | - Prasanna R. Kolatkar
- Laboratory for Structural Biochemistry, Genome Institute of Singapore, Singapore 138672
- Department of Biological Sciences, National University of Singapore, Singapore 117543
| | - Konstantin Pervushin
- School of Biological sciences, Nanyang Technological University, Singapore 637551
| | - Ralf Jauch
- Laboratory for Structural Biochemistry, Genome Institute of Singapore, Singapore 138672
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29
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Sha JQ, Liang LY, Li X, Zhang Y, Yan H, Chen G. Ligation of the quinolone antibacterial agent pipemidic acid to Keggin polyoxotungstates. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.03.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Geisberger G, Paulus S, Carraro M, Bonchio M, Patzke GR. Synthesis, Characterisation and Cytotoxicity of Polyoxometalate/Carboxymethyl Chitosan Nanocomposites. Chemistry 2011; 17:4619-25. [DOI: 10.1002/chem.201002815] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 12/12/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Georg Geisberger
- Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich (Switzerland), Fax: (+41) 44‐635‐6802
| | - Susann Paulus
- Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich (Switzerland), Fax: (+41) 44‐635‐6802
| | - Mauro Carraro
- ITM‐CNR and Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova (Italy)
| | - Marcella Bonchio
- ITM‐CNR and Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova (Italy)
| | - Greta R. Patzke
- Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich (Switzerland), Fax: (+41) 44‐635‐6802
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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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Strigul N. Does speciation matter for tungsten ecotoxicology? ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2010; 73:S0147-6513(10)00092-8. [PMID: 20965092 DOI: 10.1016/j.ecoenv.2010.05.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2009] [Revised: 03/16/2010] [Accepted: 05/01/2010] [Indexed: 05/27/2023]
Abstract
Tungsten is a widely used transition metal that has not been thoroughly investigated with regards to its ecotoxicological effects. Tungsten anions polymerize in environmental systems as well as under physiological conditions in living organisms. These polymerization/condensation reactions result in the development of several types of stable polyoxoanions. Certain chemical properties (in particular redox and acidic properties) differentiate these polyanions from monotungstates. However, our current state of knowledge on tungsten toxicology, biological and environmental effects is based entirely on experiments where monotungstates were used and assumed by the authors to be the form of tungsten that was present and that produced the observed effect. Recent discoveries indicate that tungsten speciation may be important to ecotoxicology. New results obtained by different research groups demonstrate that polytungstates develop and persist in environmental systems, and that polyoxotungstates are much more toxic than monotungstates. This paper reviews the available toxicological information from the standpoint of tungsten speciation and identifies knowledge gaps and pertinent future research directions.
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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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Wang X, Li F, Liu S, Pope MT. New liposome-encapsulated-polyoxometalates: synthesis and antitumoral activity. J Inorg Biochem 2005; 99:452-7. [PMID: 15621277 DOI: 10.1016/j.jinorgbio.2004.10.020] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2004] [Revised: 10/14/2004] [Accepted: 10/18/2004] [Indexed: 10/26/2022]
Abstract
Liposome-encapsulated polyoxometalates (abbreviated as LEP): incorporating K(6)SiW(11)TiO(40) {(SiW(11)Ti) LEP} have been synthesized and structurally characterized by elemental analysis, and IR, UV-Vis, and NMR spectroscopy. The particle sizes of these complexes ranged from 15 to 60 nm. The polyoxometalate retained the parent structure after encapsulation by the liposome. Based upon in vitro measurements with KB and HeLa cancer cells, the liposome-encapsulation enhances cell-membrane penetration, and the stability and antitumoral activity of the polyoxometalate. The toxicity of the polyoxometalate was reduced when LEPs were employed against HL-60 tumors in vivo.
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Affiliation(s)
- Xiaohong Wang
- Faculty of Chemistry, Northeast Normal University, Renmin Street 138, Changchun 130024, PR China.
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36
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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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Liu J, Mei WJ, Xu AW, Tan CP, Shi S, Ji LN. Synthesis, characterization and antiviral activity against influenza virus of a series of novel manganese-substituted rare earth borotungstates heteropolyoxometalates. Antiviral Res 2004; 62:65-71. [PMID: 15026204 DOI: 10.1016/j.antiviral.2003.12.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2003] [Accepted: 12/10/2003] [Indexed: 11/17/2022]
Abstract
A series of novel manganese-substituted mixed-valence rare earth borotungsto-heteropoly blues, Ln2H3[BW9(VI)W2(V)Mn(H2O)O39] x 12H2O (Ln(2), Ln = La, Ce, Pr, Nd, Sm, Eu and Gd), as well as their corresponding heteropoly acids (Ln(0)), have been prepared and characterized by cyclic voltammetry (CV), infrared (IR), ultraviolet (UV), thermal gravimetric (TG) and differential thermal (DTA) analysis, X-ray photoelectron spectroscopy (XPS) and electrochemistry. It's shown that the heteropoly blues anion in Ln(2) still retains the alpha-Keggin structure but with a slight distortion as heteropoly acids do, and Mn and W atoms distribute statistically in the whole molecular. At the same time, the cell toxicity and antiviral activity of these rare earth borotungstateheteropoly blues against influenza virus type A and type B in MDCK cells have been investigated using plaque reduction assay. The results elucidated that these complexes exhibit a significantly inhibitory activity and almost no cytotoxicity comparable with those obtained from virazole, and the anti-virus activity depend on the structure of these complexes.
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Affiliation(s)
- Jie Liu
- Department of Chemistry, The Key Laboratory of Gene Engineering of Education Ministry, Zhongshan University, Guangzhou 510275, PR China.
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Judd DA, Nettles JH, Nevins N, Snyder JP, Liotta DC, Tang J, Ermolieff J, Schinazi RF, Hill CL. Polyoxometalate HIV-1 protease inhibitors. A new mode of protease inhibition. J Am Chem Soc 2001; 123:886-97. [PMID: 11456622 DOI: 10.1021/ja001809e] [Citation(s) in RCA: 291] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nb-containing polyoxometalates (POMs) of the Wells-Dawson class inhibit HIV-1 protease (HIV-1P) by a new mode based on kinetics, binding, and molecular modeling studies. Reaction of alpha(1)-K(9)Li[P(2)W(17)O(61)] or alpha(2)-K(10)[P(2)W(17)O(61)] with aqueous H(2)O(2) solutions of K(7)H[Nb(6)O(19)] followed by treatment with HCl and KCl and then crystallization affords the complexes alpha(1)-K(7)[P(2)W(17)(NbO(2))O(61)] (alpha(1)()1) and alpha(2)-K(7)[P(2)W(17)(NbO(2))O(61)] (alpha(2)()1) in 63 and 86% isolated yields, respectively. Thermolysis of the crude peroxoniobium compounds (72-96 h in refluxing H(2)O) prior to treatment with KCl converts the peroxoniobium compounds to the corresponding polyoxometalates (POMs), alpha(1)-K(7)[P(2)W(17)NbO(62)] (alpha(1)()2) and alpha(2)-K(7)[P(2)W(17)NbO(62)] (alpha(2)()2), in moderate yields (66 and 52%, respectively). The identity and high purity of all four compounds were confirmed by (31)P NMR and (183)W NMR. The acid-induced dimerization of the oxo complexes differentiates sterically between the cap (alpha(2)) site and the belt (alpha(1)) site in the Wells-Dawson structure (alpha(2)()2 dimerizes in high yield; alpha(1)()2 does not). All four POMs exhibit high activity in cell culture against HIV-1 (EC(50) values of 0.17-0.83 microM), are minimally toxic (IC(50) values of 50 to >100 microM), and selectively inhibit purified HIV-1 protease (HIV-1P) (IC(50) values for alpha(1)()1, alpha(2)()1, alpha(1)()2, and alpha(2)()2 of 2.0, 1.2, 1.5, and 1.8 microM, respectively). Thus, theoretical, binding, and kinetics studies of the POM/HIV-1P interaction(s) were conducted. Parameters for [P(2)W(17)NbO(62)](7)(-) were determined for the Kollman all-atom (KAA) force field in Sybyl 6.2. Charges for the POM were obtained from natural population analysis (NPA) at the HF/LANL2DZ level of theory. AutoDock 2.2 was used to explore possible binding locations for the POM with HIV-1P. These computational studies strongly suggest that the POMs function not by binding to the active site of HIV-1P, the mode of inhibition of all other HIV-1P protease inhibitors, but by binding to a cationic pocket on the "hinge" region of the flaps covering the active site (2 POMs and cationic pockets per active homodimer of HIV-1P). The kinetics and binding studies, conducted after the molecular modeling, are both in remarkable agreement with the modeling results: 2 POMs bind per HIV-1P homodimer with high affinities (K(i) = 1.1 +/- 0.5 and 4.1 +/- 1.8 nM in 0.1 and 1.0 M NaCl, respectively) and inhibition is noncompetitive (k(cat) but not K(m) is affected by the POM concentration).
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Affiliation(s)
- D A Judd
- Contribution from the Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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Liu J, Mei W, Li Y, Wang E, Ji L, Tao P. Antiviral activity of mixed-valence rare earth borotungstate heteropoly blues against influenza virus in mice. Antivir Chem Chemother 2000; 11:367-72. [PMID: 11227994 DOI: 10.1177/095632020001100603] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The acute and accumulated toxicity of the rare earth borotungstate heteropoly blues, HPB-2, Ce2H3[BW9(VI)W2(V)Mn(H2O)O39].12H2O, which is active against influenza virus in Kunming mice, were investigated in Kunming mice following oral and intraperitoneal administration. The activity of HPB-2 against influenza virus (FM1) in the mice was then investigated. HPB-2, given either orally (p.o.) or intraperitoneally (i.p.), was shown to have activity. HPB-2 was shown to be more effective than the positive control, ribavirin, and it was also found that i.p. administration was more effective than p.o. administration.
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Affiliation(s)
- J Liu
- State Key Laboratory of Ultrafast Laser Spectroscopy/Department of Chemistry, Zhongshan University, Guangzhou, PR China.
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Affiliation(s)
- Jeffrey T. Rhule
- Veterans Affairs Medical Center, and Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Decatur, Georgia 30033
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Ni L, Boudinot FD, Boudinot SG, Henson GW, Bossard GE, Martellucci SA, Ash PW, Fricker SP, Darkes MC, Theobald BR. Pharmacokinetics of antiviral polyoxometalates in rats. Antimicrob Agents Chemother 1994; 38:504-10. [PMID: 8203845 PMCID: PMC284488 DOI: 10.1128/aac.38.3.504] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Polyoxometalates are soluble mineral compounds formed principally of oxide anions and early transition metal cations. The polyoxometalates K12H2[P2W12O48].24H2O (JM 1591), K10[P2W18Zn4(H2O)2O68].20H2O (JM 1596), and [(CH3)3NH]8[Si2W18Nb6O77] (JM 2820) demonstrate potent antiviral activity against human immunodeficiency virus types 1 and 2, herpes simplex virus, and cytomegalovirus in vitro. The preclinical pharmacokinetics of these three compounds were characterized after single-dose intravenous administration of 50 mg/kg to rats. Plasma, urine, and feces were collected for 168 h, and polyoxometalate concentrations were determined by atomic emission. Serum protein binding was measured by equilibrium dialysis. All three compounds were highly bound to serum proteins in a concentration-dependent manner. Total and unbound concentrations of the three compounds in plasma declined in a triexponential manner with terminal half-lives of 246.0 +/- 127.0, 438.4 +/- 129.4, and 32.2 +/- 5.37 h (mean +/- standard deviation) for JM 1591, JM 1596, and JM 2820, respectively. Systemic clearances based on total concentrations in plasma were low, averaging 0.016 +/- 0.002, 0.015 +/- 0.002, and 0.018 +/- 0.003 liter/h/kg for JM 1591, JM 1596, and JM 2820, respectively. The clearances of unbound compounds from plasma averaged 0.966 +/- 0.136, 0.050 +/- 0.005, and 0.901 +/- 0.165 liter/h/kg for JM 1591, JM 1596, and JM 2820, respectively. For JM 1596, the clearance of unbound compound from the kidneys was lower than the glomerular filtration rate (0.086 liter/h/kg), suggesting this polyoxometalate underwent renal tubular reabsorption. However, JM 1591 and JM 2820 appeared to undergo tubular secretion. The fraction of the dose recovered in urine was 11.5, 46.8, and 10.6% for JM 1591, JM 1596, and JM 2820, respectively. Approximately 5% of the dose of each polyoxometalate was recovered in feces. The steady-state volume of distribution based on total concentrations averaged 1.44 liters/kg for JM 1591, 2.39 liters/kg for JM 1596, and 0.59 liter/kg for JM 2820, indicating moderate to wide distribution throughout the body. All three compounds were detected in various tissues 1 week after single-dose administrations, with the highest levels found in the kidneys and liver. The results of this study indicate that the disposition of polyoxometalates is highly dependent on their molecular structure.
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Affiliation(s)
- L Ni
- Department of Pharmaceutics, College of Pharmacy, University of Georgia, Athens 30602
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Blasecki JW. Of Therapy, Toxicity and Tungstates: The Anti-Retroviral Pharmacology of Polyoxometalates. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/978-94-011-0920-8_27] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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Polyoxometalates in Catalytic Selective Homogeneous Oxygenation and Anti-HIV Chemotherapy. TOPICS IN MOLECULAR ORGANIZATION AND ENGINEERING 1994. [DOI: 10.1007/978-94-011-0920-8_26] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Yamase T. Polyoxometalates for Molecular Devices: Antitumor Activity and Luminescence. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/978-94-011-0920-8_25] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Inouye Y, Tokutake Y, Yoshida T, Seto Y, Hujita H, Dan K, Yamamoto A, Nishiya S, Yamase T, Nakamura S. In vitro antiviral activity of polyoxomolybdates. Mechanism of inhibitory effect of PM-104 (NH4)12H2(Eu4(MoO4)(H2O)16(Mo7O24)4).13H2O on human immunodeficiency virus type 1. Antiviral Res 1993; 20:317-31. [PMID: 8387260 DOI: 10.1016/0166-3542(93)90075-t] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A screening for inhibitors of human immunodeficiency virus type 1 (HIV-1) among various types of isopolyoxomolybdates and heteropolyoxomolybdates was carried out by using an in vitro assay system measuring the cytopathogenicity of HIV-1 in CD4+ human MT-4 cells. A novel heteropolyoxomolybdate named PM-104 with the chemical formula (NH4)12H2(Eu4(MoO4)(H2O)16(Mo7O24)4).13H2O was found to be associated with potent anti-HIV-1 activity. PM-104 interferes with virus infection at a very early step such as adsorption and/or penetration into the cells. In addition to the cytopathic effect of HIV-1 on MT-4 cells, syncytium formation between mock-infected MOLT-4 cells and MOLT-4 cells chronically infected with either HIV-1 or HIV-2 is suppressed by PM-104. PM-104 also blocks the replication of herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2). The antiviral properties of PM-104 could be attributed to the combined effect of europium atoms and its peculiar three-dimensional anion structure.
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Affiliation(s)
- Y Inouye
- Institute of Pharmaceutical Sciences, Hiroshima University School of Medicine, Japan
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Yamase T. Polyoxometalates for molecular devices: Antitumor activity and luminescence. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf00999636] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Polyoxometalates in catalytic selective homogeneous oxygenation and anti-HIV chemotherapy. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf00999637] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Affiliation(s)
- R F Schinazi
- Emory University School of Medicine, Department of Pediatrics, Atlanta, GA 30322
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