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Al-Noaman A, Rawlinson SCF. A novel bioactive glass/graphene oxide composite coating for a polyether ether ketone-based dental implant. Eur J Oral Sci 2023; 131:e12915. [PMID: 36707252 DOI: 10.1111/eos.12915] [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: 07/29/2022] [Accepted: 12/22/2022] [Indexed: 01/29/2023]
Abstract
Polyether ether ketone (PEEK) is a biocompatible material that lacks antimicrobial activity and bioactivity; therefore, is not appropriate for use as a dental implant. To overcome these deficiencies, a novel composite coating of bioactive glass and graphene oxide was prepared. PEEK discs were polished, cleaned, and the surface treated with sulfuric acid for 15 min. The composite coating consisted of bioactive glass produced by the sol-gel route and doped with 0.75 wt% graphene oxide. X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy-energy dispersive spectroscopy analyses were employed to characterize the composite coating, and the coating adhesion strength quantified using a pull-off test. Cytotoxicity was assessed using osteoblast-like cells and gingival fibroblasts. The wettability of the coated and non-coated samples was determined by optical contact angle assessment, and bioactivity was assessed by immersion in simulated body fluid. The results revealed that the bioactive glass/graphene oxide composite coating, approximately 7 μm thick, was transparent, homogenous with few microcracks and microporosities, but adhered strongly and was not cytotoxic to either osteoblast-like cells or gingival fibroblasts. The wettability of the PEEK sample was increased to <20° after coating with the composite, and apatite formation was detectable after 14 days of immersion in simulated body fluid.
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Affiliation(s)
- Ahmed Al-Noaman
- Department of Oral Surgery, College of Dentistry, University of Babylon, Babylon City, Iraq
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2
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Mahajan PS, Smith SJ, Hughes SH, Zhao X, Burke TR. A Practical Approach to Bicyclic Carbamoyl Pyridones with Application to the Synthesis of HIV-1 Integrase Strand Transfer Inhibitors. Molecules 2023; 28:molecules28031428. [PMID: 36771093 PMCID: PMC9919513 DOI: 10.3390/molecules28031428] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/16/2023] [Accepted: 01/26/2023] [Indexed: 02/05/2023] Open
Abstract
An efficient one-pot synthetic method has been developed for the preparation of bicyclic carbamoyl pyridones from the known common intermediate methyl 5-((2,4-difluorobenzyl)carbamoyl)-1-(2,2-dimethoxyethyl)-3-methoxy-4-oxo-1,4-dihydropyridine-2-carboxylate (8). The scalable protocol is facile and employs readily available reagents, needing only a single purification as the final step. The utility of the approach was demonstrated by preparing a library of HIV-1 integrase strand transfer inhibitors (INSTIs) that differ by the presence or absence of a double bond in the B-ring of the bicyclic carbamoyl pyridines 6 and 7. Several of the analogs show good antiviral potencies in single-round HIV-1 replication antiviral assays and show no cytotoxicity in cell culture assays. In general, the compounds with a B-ring double bond have higher antiviral potencies than their saturated congeners. Our methodology should be applicable to the synthesis of a range of new metal-chelating analogs.
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Affiliation(s)
- Pankaj S. Mahajan
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Steven J. Smith
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
- HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Stephen H. Hughes
- HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Xuezhi Zhao
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Terrence R. Burke
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
- Correspondence: ; Tel.: +1-301-846-5906; Fax: +1-301-846-6033
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3
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Cao Y, Aimaiti A, Zhu Z, Zhou L, Ye D. Discovery of Novel 3-Hydroxyquinazoline-2,4(1 H,3 H)-Dione Derivatives: A Series of Metal Ion Chelators with Potent Anti-HCV Activities. Int J Mol Sci 2022; 23:ijms23115930. [PMID: 35682608 PMCID: PMC9180926 DOI: 10.3390/ijms23115930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/21/2022] [Accepted: 05/24/2022] [Indexed: 11/16/2022] Open
Abstract
Millions of people worldwide suffer from acute or chronic liver inflammation caused by the hepatitis C virus (HCV). Metal ion chelators have achieved widespread success in the development of antiviral drugs. Some inhibitors with metal ion chelating structures have been proven to have good inhibitory activities on non-structural protein 5B (NS5B) polymerase. However, most of the reported metal ion chelators showed poor anti-HCV potency at the cellular level. Hence, we designed and synthesized a series of 3-hydroxyquinazoline-2,4(1H,3H)-dione derivatives with novel metal ion chelating structures. Typical compounds such as 21h, 21k, and 21t showed better anti-HCV activities than ribavirin with EC50 values less than 10 μM. 21t is currently known as one of the metal ion chelators with the best anti-HCV potency (EC50 = 2.0 μM) at the cellular level and has a better therapeutic index (TI > 25) as compared to ribavirin and the reported compound 6. In the thermal shift assay, the representative compounds 21e and 21k increased the melting temperature (Tm) of NS5B protein solution by 1.6 °C and 2.1 °C, respectively, at the test concentration, indicating that these compounds may exert an anti-HCV effect by targeting NS5B. This speculation was also supported by our molecular docking studies and ultraviolet-visible (UV-Vis) spectrophotometry assay, in which the possibility of binding of 3-hydroxyquinazoline-2,4(1H,3H)-diones with Mg2+ in the NS5B catalytic center was observed.
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Affiliation(s)
- Yang Cao
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Rd, Shanghai 201203, China; (Y.C.); (Z.Z.)
| | - Abudumijiti Aimaiti
- Shanghai Medical College, Fudan University, 130 Dongan Rd, Shanghai 200032, China;
| | - Zeyun Zhu
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Rd, Shanghai 201203, China; (Y.C.); (Z.Z.)
| | - Lu Zhou
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Rd, Shanghai 201203, China; (Y.C.); (Z.Z.)
- Correspondence: (L.Z.); (D.Y.)
| | - Deyong Ye
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 826 Zhangheng Rd, Shanghai 201203, China; (Y.C.); (Z.Z.)
- Correspondence: (L.Z.); (D.Y.)
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4
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Melendez-Zamudio M, Chavda K, Brook MA. Chelating Silicone Dendrons: Trying to Impact Organisms by Disrupting Ions at Interfaces. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27061869. [PMID: 35335233 PMCID: PMC8954278 DOI: 10.3390/molecules27061869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 12/02/2022]
Abstract
The viability of pathogens at interfaces can be disrupted by the presence of (cationic) charge and chelating groups. We report on the synthesis of silicone dendrimers and linear polymers based on a motif of hexadentate ligands with the ability to capture and deliver metal ions. Mono-, di- or trialkoxysilanes are converted in G1 to analogous vinylsilicones and then, iteratively using the Piers-Rubinsztajn reaction and hydrosilylation, each vinyl group is transformed into a trivinyl cluster at G2. The thiol-ene reaction with cysteamine or 3-mercaptopropionic acid and the trivinyl cluster leads to hexadentate ligands 3 × N–S or 3 × HOOC–S. The compounds were shown to effectively capture a variety of metals ions. Copper ion chelation was pursued in more detail, because of its toxicity. On average, metal ions form chelates with 2.4 of the three ligands in a cluster. Upon chelation, viscous oils are converted to (very) soft elastomers. Most of the ions could be stripped from the elastomers using aqueous EDTA solutions, demonstrating the ability of the silicones to both sequester and deliver ions. However, complete ion removal is not observed; at equilibrium, the silicones remain ionically crosslinked.
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Domagała K, Bell J, Yüzbasi NS, Sinnet B, Kata D, Graule T. Virus removal from drinking water using modified activated carbon fibers. RSC Adv 2021; 11:31547-31556. [PMID: 35496858 PMCID: PMC9041606 DOI: 10.1039/d1ra06373a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 09/13/2021] [Indexed: 12/20/2022] Open
Abstract
Activated carbon (AC) exhibits superior sorption properties compared to other porous materials, due to well-developed porous structures and high surface areas. Therefore, it is widely applied in its various forms in water purification to remove a diverse range of contaminating species. The presence of viruses in fresh water bodies poses a serious issue for human health. However, AC has not yet been commonly applied to waterborne virus removal. In this study, we present oxidation and copper impregnation treatment procedures of activated carbon fibers (ACFs) that resulted in porous structure and surface chemistry modifications. The effect of these modifications on virus removal was investigated by experimental flow studies and revealed up to 2.8 log10 reduction value (LRV) and 3.6 LRV of MS2 bacterio-phages for non-modified and oxidized ACFs, respectively, emphasizing the advantages of ACF surface functionalization. Copper modified fibers demonstrated a high sensitivity to media composition, resulting in a release of metal and therefore limited virucidal capacity.
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Affiliation(s)
- Kamila Domagała
- Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129, Dübendorf Switzerland
- Faculty of Materials Science and Ceramics, AGH, University of Science and Technology, Krakow, Poland Faculty of Materials Science and Ceramics al. Adama Mickiewicza 30 Krakow Poland
| | - Jon Bell
- Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129, Dübendorf Switzerland
| | - Nur Sena Yüzbasi
- Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129, Dübendorf Switzerland
| | - Brian Sinnet
- Department of Process Engineering, Eawag, Swiss Federal Institute of Aquatic Science and Technology Überlandstrasse 133, Dübendorf Switzerland
| | - Dariusz Kata
- Faculty of Materials Science and Ceramics, AGH, University of Science and Technology, Krakow, Poland Faculty of Materials Science and Ceramics al. Adama Mickiewicza 30 Krakow Poland
| | - Thomas Graule
- Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129, Dübendorf Switzerland
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6
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Bivalent Metal-Chelating Properties of Harzianic Acid Produced by Trichoderma pleuroticola Associated to the Gastropod Melarhaphe neritoides. Molecules 2020; 25:molecules25092147. [PMID: 32375327 PMCID: PMC7248884 DOI: 10.3390/molecules25092147] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 12/21/2022] Open
Abstract
Harzianic acid is a secondary metabolite of Trichoderma, structurally belonging to the dienyltetramic acid subgroup of the tetramic acids. Biological activities of harzianic acid are of great interest for its antimicrobial and plant growth-promoting activities, which might be related to its chelating properties. In the present work harzianic acid, isolated from cultures of a strain of Trichoderma pleuroticola associated to the gastropod Melarhaphe neritoides, was studied as a complexant agent of a number of biologically relevant transition metals (i.e., Zn2+, Fe2+, Cu2+, and Mn2+), using UV-VIS, potentiometry, MS and NMR techniques. Our findings show the coordination capacity of harzianic acid toward the above cations through the formation of neutral or charged complexes in a variable ratio depending on the metal and pH conditions.
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7
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Affiliation(s)
- Yashpal Singh Malik
- ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Izatnagar, Uttar Pradesh India
| | - Raj Kumar Singh
- ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Izatnagar, Uttar Pradesh India
| | - Mahendra Pal Yadav
- ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Izatnagar, Uttar Pradesh, India, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, India
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8
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Chamorro C, Camarasa MJ, Pérez-Pérez MJ, de Clercq E, Balzarini J, Félix AS. An Approach towards the Synthesis of Potential Metal-Chelating TSAO-T Derivatives as Bidentate Inhibitors of Human Immunodeficiency virus Type 1 Reverse Transcriptase. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029800900505] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Novel derivatives of the potent human immunodeficiency virus type 1 (HIV-1) reverse transcriptase (RT) inhibitor TSAO-T have been designed, synthesized and tested for their in vitro antiretro-viral activity against HIV. These TSAO-T derivatives have been designed as potential bidentate inhibitors of HIV-1 RT, which combine in their structure the functionality of a non-nucleoside RT inhibitor (TSAO-T) and a bivalent ion-chelating moiety (a β-diketone moiety) linked through an appropriate spacer to the N-3 of thymine of TSAO-T . Some of the new compounds have an anti-HIV-1 activity comparable to that of the parent compound TSAO-T, but display a markedly increased antiviral selectivity. There was a clear relationship between antiviral activity and the length of the spacer group that links the TSAO molecule with the chelating moiety. A shorter spacer invariably resulted in increased antiviral potency. None of the TSAO-T derivatives were endowed with anti-HIV-2 activity.
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Affiliation(s)
- C Chamorro
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - M-J Camarasa
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - M-J Pérez-Pérez
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - E de Clercq
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - J Balzarini
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - A San Félix
- Instituto de Química Médica (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
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9
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González ME, Martínez-Abarca F, Carrasco L. Flavonoids: Potent Inhibitors of Poliovirus RNA Synthesis. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029000100304] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Some naturally occurring flavonoids, such as 3-methyl quercetin and Ro-090179, show potent anti-picornavirus activity. They inhibit poliovirus replication at concentrations 100-fold or 1000-fold lower than hydroxybenzyl-benzimidazole (HBB) and guanidine, respectively. Ro-090179 selectively blocks viral RNA synthesis in poliovirus-infected HeLa cells more strongly than 3-methyl quercetin and is therefore the most potent and selective inhibitor of poliovirus RNA synthesis described until now. In addition, Ro-090179 discriminates in its inhibition between plus- and minus-stranded RNA synthesis. Thus, analysis of the viral RNA made in poliovirus-infected cells when the compound is added late in the infection cycle, indicates that the synthesis of genomic RNA is potently blocked, whereas minus-stranded RNA synthesis is not inhibited. These findings make Ro-090179 a valuable compound for obtaining insight into the molecular mechanisms of poliovirus RNA replication.
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Affiliation(s)
- M. E. González
- Centro de Biología Molecular (CSIC-UAM), Universidad Autónoma, Canto Blanco, 28049 Madrid, Spain
| | - F. Martínez-Abarca
- Centro de Biología Molecular (CSIC-UAM), Universidad Autónoma, Canto Blanco, 28049 Madrid, Spain
| | - L. Carrasco
- Centro de Biología Molecular (CSIC-UAM), Universidad Autónoma, Canto Blanco, 28049 Madrid, Spain
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10
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Shih SJ, Chen CY, Lin YC, Lee JC, Chung RJ. Investigation of bioactive and antibacterial effects of graphene oxide-doped bioactive glass. ADV POWDER TECHNOL 2016. [DOI: 10.1016/j.apt.2016.04.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Wiśniewska C, Koszelewski D, Zysk M, Kłossowski S, Żądło A, Brodzka A, Ostaszewski R. Enzymatic Synergism in the Synthesis of β-Keto Esters. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500676] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Bal-Demirci T, Sahin M, Ozyürek M, Kondakçı E, Ulküseven B. Synthesis, antioxidant activities of the nickel(II), iron(III) and oxovanadium(IV) complexes with N2O2 chelating thiosemicarbazones. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 126:317-323. [PMID: 24656797 DOI: 10.1016/j.saa.2014.02.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 01/30/2014] [Accepted: 02/09/2014] [Indexed: 06/03/2023]
Abstract
The nickel(II), iron(III) and oxovanadium(IV) complexes of the N2O2 chelating thiosemicarbazones were synthesized using 4-hydroxysalicyladehyde-S-methylthiosemicarbazone and R1-substitute-salicylaldehyde (R1: 4-OH, H) in the presence of Ni(II), Fe(III), VO(IV) ions by the template reaction. The structures of the thiosemicarbazone complexes were characterized by FT-IR, (1)H NMR, elemental, ESI-MS and APCI-MS analysis. The synthesized compounds were screened for their antioxidant capacity by using the cupric reducing antioxidant capacity (CUPRAC) method. Trolox equivalent antioxidant capacity (TEAC) of iron(III) complex, 1c, was measured to be higher than that of the other complexes. Other parameters of antioxidant activity (scavenging effects on •OH, O2(•-) and H2O2) of these compounds were also determined. All the compounds have shown encouraging ROS scavenging activities.
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Affiliation(s)
- Tülay Bal-Demirci
- Department of Chemistry, Inorganic Chemistry Section, Istanbul University, 34320 Avcilar, Istanbul, Turkey.
| | - Musa Sahin
- Department of Chemistry, Inorganic Chemistry Section, Istanbul University, 34320 Avcilar, Istanbul, Turkey
| | - Mustafa Ozyürek
- Department of Chemistry, Analytical Chemistry Section, Istanbul University, 34320 Avcilar, Istanbul, Turkey
| | - Esin Kondakçı
- Department of Chemistry, Analytical Chemistry Section, Istanbul University, 34320 Avcilar, Istanbul, Turkey
| | - Bahri Ulküseven
- Department of Chemistry, Inorganic Chemistry Section, Istanbul University, 34320 Avcilar, Istanbul, Turkey
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13
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Loranger MW, Forget SM, McCormick NE, Syvitski RT, Jakeman DL. Synthesis and evaluation of l-rhamnose 1C-phosphonates as nucleotidylyltransferase inhibitors. J Org Chem 2013; 78:9822-33. [PMID: 24020932 DOI: 10.1021/jo401542s] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We report the synthesis of a series of phosphonates and ketosephosphonates possessing an L-rhamnose scaffold with varying degrees of fluorination. These compounds were evaluated as potential inhibitors of α-D-glucose 1-phosphate thymidylyltransferase (Cps2L), the first enzyme in Streptococcus pneumoniae L-rhamnose biosynthesis, and a novel antibiotic target. Enzyme-substrate and enzyme-inhibitor binding experiments were performed using water-ligand observed binding via gradient spectroscopy (WaterLOGSY) NMR for known sugar nucleotide substrates and selected phosphonate analogues. IC50 values were measured and Ki values were calculated for inhibitors. New insights were gained into the binding promiscuity of enzymes within the prokaryotic L-rhamnose biosynthetic pathway (Cps2L, RmlB-D) and into the mechanism of inhibition for the most potent inhibitor in the series, L-rhamnose 1C-phosphonate.
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Affiliation(s)
- Matthew W Loranger
- Department of Chemistry, Dalhousie University , 6274 Coberg Road, P.O. Box 15,000, Halifax, Nova Scotia B3H 4R2, Canada
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14
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Gomes MAGB, Carreira GM, Souza DPV, Nogueira PMR, de Melo EJT, Maria EJ. [Study of the effect of thiosemicarbazones against Toxoplasma gondii]. C R Biol 2013; 336:203-6. [PMID: 23849723 DOI: 10.1016/j.crvi.2013.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 03/01/2013] [Accepted: 03/02/2013] [Indexed: 11/27/2022]
Abstract
Toxoplasmosis is a neglected disease, with an estimated occurrence of one-third of the population worldwide. Research in medicinal chemistry has for some years been pursuing the development of new drugs against toxoplasmosis, because current treatments cause serious side effects in the patient. The use of thiosemicarbazones as an alternative option for the treatment of various diseases has been published in recent years, due to their, among others, anticancer, antimalarial, antitrypanosomal, antibacterial, and antitoxoplasmosis activities, the latter being the subject of this study, which is based upon biological analyses and tests of the response of Toxoplasma gondii in the presence of thiosemicarbazones.
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Affiliation(s)
- Marco Antônio G B Gomes
- Laboratorio de Ciências Química, Universidade Estadual do Norte Fluminense, Avenue Alberto Lamego, 2000 Horto, CEP 28015620, Campos dos Goytacazes, RJ, Brésil.
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15
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Devi NS, Singh SJ, Singh OM. An efficient transesterification of β-oxodithioesters catalyzed by stannous chloride under solvent-free conditions. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Gomes MAGB, Carvalho LP, Rocha BS, Oliveira RR, de Melo EJT, Maria EJ. Evaluating anti-Toxoplasma gondii activity of new serie of phenylsemicarbazone and phenylthiosemicarbazones in vitro. Med Chem Res 2012. [DOI: 10.1007/s00044-012-0347-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Affiliation(s)
- Rima Das
- Department of Chemistry; Indian Institute of Technology Madras; Chennai; 600 036; Tamil Nadu; India
| | - Debashis Chakraborty
- Department of Chemistry; Indian Institute of Technology Madras; Chennai; 600 036; Tamil Nadu; India
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18
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Gong DH, Li JF, Yuan CY. A new and facile synthesis of 6-methyl-2-trifluoromethyl-4-(O,O- dialkyl) phosphoryl- quinoline. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20010191217] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Koval L, Dzyuba V, Bon V, Ilnitska O, Pekhnyo V. Synthesis and structure of anhydrous complexes of magnesium(II) with β-ketoesters of higher alcohols. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.05.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Koval L, Dzyuba V, Ilnitska O, Pekhnyo V. Efficient transesterification of ethyl acetoacetate with higher alcohols without catalysts. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.01.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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21
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Romanenko VD, Kukhar VP. Fluorinated phosphonates: synthesis and biomedical application. Chem Rev 2007; 106:3868-935. [PMID: 16967924 DOI: 10.1021/cr051000q] [Citation(s) in RCA: 289] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Vadim D Romanenko
- Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of the Ukraine, 1 Murmanska Street, Kyiv-94 02660, Ukraine
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22
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Gross H, Ozegowski S. α-SUBSTITUIERTE PHOSPHONATE 54.1 SYNTHESE VON 4-HYDROXYPHENYLMETHAN-BISPHOSPHONSÄURE. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/10426509008046838] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Hans Gross
- a Zentralinstitut für Organische Chemie der Akademie der Wissenschaften der DDR , Rudower Chaussee 5, DDR-1199 , Berlin , Adlershof
| | - Sigrid Ozegowski
- a Zentralinstitut für Organische Chemie der Akademie der Wissenschaften der DDR , Rudower Chaussee 5, DDR-1199 , Berlin , Adlershof
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23
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24
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Rana G, Vyakaranam K, Spielvogel BF, Maguire JA, Hosmane NS. Novel boron analogues of pyrophosphates. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01197-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gong D, Zhang L, Yuan C. A convenient synthesis of 5-(O,O-dialkylphosphoryl)-4-aryl-3,4-dihydropyrimidin-2(1H)-ones. HETEROATOM CHEMISTRY 2003. [DOI: 10.1002/hc.10058] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Yuan C, Xiao J, Zhang X. Studies on organophosphorus compounds 105: A facile synthesis of dialkyl 6-substituted-4-hydroxy-2-trifluoromethylquinoline-3-phosphonates. HETEROATOM CHEMISTRY 2000. [DOI: 10.1002/(sici)1098-1071(2000)11:3<240::aid-hc13>3.0.co;2-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Li C, Yuan C. Studies on organophosphorus compounds 81. A novel synthetic approach to substituted cyclopentane-1,1-diylbisphosphonates via Pd(0) catalyzed enyne cyclization. HETEROATOM CHEMISTRY 1993. [DOI: 10.1002/hc.520040518] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Simonian J, Haldar D, Delmaestro E, Trombetta LD. Effect of disulfiram (DS) on mitochondria from rat hippocampus: metabolic compartmentation of DS neurotoxicity. Neurochem Res 1992; 17:1029-35. [PMID: 1324439 DOI: 10.1007/bf00966832] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This experiment was designed to study the acute effects of disulfiram on mitochondrial enzymes in nonsynaptic and synaptic mitochondria from rat hippocampus. Cytochrome c oxidase, monoamine oxidase-B, glycerolphosphate acyltransferase and beta-hydroxybutyrate dehydrogenase were studied. Differences in enzyme activity were seen in controls. Cytochrome c oxidase activity was higher in synaptic mitochondria whereas glycerolphosphate acyltransferase activity was higher in nonsynaptic mitochondria. Mitochondria from disulfiram treated rats, particularly synaptic mitochondria, exhibited lower specific activities of cytochrome c oxidase and monoamine oxidase-B. These alterations were not limited to either the inner or outer mitochondrial membrane. Transmission electron microscopy revealed that mitochondria from disulfiram treated rats were severely altered in isolated preparations as well as in those from whole tissue. This study shows that disulfiram exerts a differential effect on mitochondrial subpopulations.
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Affiliation(s)
- J Simonian
- College of Pharmacy and Allied Health Professions, St. John's University, Jamaica, NY 11439
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Yuan C, Li C. Studies on organophosphorus compounds59. Regioselective phosphorylation and formylation of propenylphosphonates?A novel and convenient route to propenylidenebisphosphonates and 1-methoxycarbonylpropenylphosphonates. HETEROATOM CHEMISTRY 1992. [DOI: 10.1002/hc.520030529] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yuan C, Li C. STUDIES ON ORGANOPHOSPHORUS COMPOUNDS 62. REACTIONS OF METHYLENEBISPHOSPHONATEWITH α-NITROALKENES. A NOVEL SYNTHESIS OF ETHENYLIDENEBISPHOSPHONATES AND 2-ISOXAZOLINE-5,5-DIYLBISPHOSPHONATES. PHOSPHORUS SULFUR 1992. [DOI: 10.1080/10426509208036856] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Slavin LL, Bose RN. Phosphonato complexes of platinum(II): kinetics of formation and phosphorus-31 NMR characterization studies. J Inorg Biochem 1990; 40:339-47. [PMID: 2150856 DOI: 10.1016/0162-0134(90)80068-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Reactions of cis-diamminedichloroplatinum(II) with phosphonoformic acid (PFA), phosphonoacetic acid (PAA), and methylenediphosphonic acid (MDP) yield various phosphonatoplatinum(II) chelates which were characterized by phosphorus-31 NMR spectroscopy. The P-31 resonances for the chelates appear at 6-12 ppm downfield as compared to the uncomplexed ligands. All complexes exhibit monoprotic acidic behavior in the pH range 2-10. The chemical shift-pH profiles yielded acidity constants, 1.0 x 10(-4), 1.5 x 10(-4), and 1.3 x 10(-6) M-1, for the PFA, PAA, and MDP chelates. In addition to the monomeric chelate, MDP formed a bridged diplatinum(II,II) complex when it reacted with cis-Pt (NH3)2(H2O)2(2)+. The P-31 resonance for this binuclear complex appears at 22 ppm downfield from the unreacted ligand. Rate data for the complexation reactions of the phosphonate ligands with the dichloroplatinum complex are consistent with a mechanism in which a monodentate complex is formed initially through rate-limiting aquation process of the platinum complex, followed by a rapid chelation. For the PFA and PAA complexes, initial binding sites are the carboxylato oxygens. Implications of the various binding modes of the phosphonates in relationship to their antiviral activities are discussed.
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Affiliation(s)
- L L Slavin
- Chemistry Department, Kent State University, Ohio
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Hørding M, Gøtzsche PC, Bygbjerg IC, Christensen LD, Faber V. Lack of immunomodulating effect of disulfiram on HIV positive patients. INTERNATIONAL JOURNAL OF IMMUNOPHARMACOLOGY 1990; 12:145-7. [PMID: 2184133 DOI: 10.1016/0192-0561(90)90047-q] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Disulfiram (Antabuse (R)) is metabolized to two molecules of diethyldithiocarbamate, which has been reported to be an immunomodulating agent. In a double blind trial, 15 HIV antibody positive homosexual men were given daily doses of 100 mg or 400 mg of disulfiram or placebo, for 4 weeks. All had a CD4-count below 500 X 10(6)/l and/or a pokeweed mitogen response in a lymphocyte proliferation assay less than 50% of normal controls. None suffered from opportunistic infections. No significant effect of disulfiram on immunological, haematological, biochemical or clinical variables was observed in this short-term trial.
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Affiliation(s)
- M Hørding
- Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark
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Mohan P, Singh R, Wepsiec J, Gonzalez I, Sun DK, Sarin PS. Inhibition of HIV replication by naphthalenemonosulfonic acid derivatives and a bis naphthalenedisulfonic acid compound. Life Sci 1990; 47:993-9. [PMID: 2122146 DOI: 10.1016/0024-3205(90)90471-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Several naphthalenemonosulfonic acid analogs and a bis naphthalenedisulfonic acid have been evaluated for anti-HIV activity in assays using H9 and MOLT-3 cells. Among the naphthalenemonosulfonic acids, a 4-amino-5-hydroxy compound and a 4,5-diamino compound showed low anti-HIV activity (upto 50% inhibition) at non-toxic doses. The bis naphthalenedisulfonic acid compound demonstrated significant suppression of HIV-1 antigen expression as measured by monoclonal antibodies to p17 (95%), p24 (94%) and syncytia inhibition (82%) at a dose of 20 micrograms/ml that was non-toxic to the host cells. The bis naphthalenedisulfonic acid analog represents a new class of compounds which may be effective in the treatment of HIV infected patients. The structure activity relationship and a probable mode of action of these compounds is discussed.
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Affiliation(s)
- P Mohan
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois, Chicago
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Reaction of trialkyl phosphites with phosphonodithioformates: Access to substituted methylene bis-phosphonates via stabilized ylids. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)88749-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Research into the biology of human immunodeficiency virus type 1 (HIV-1), the causative agent of the acquired immunodeficiency syndrome, has yielded valuable information about the replicative cycle of the virus. The steps involved are (1) attachment of the virus to a receptor protein on the surface of the target cell, (2) entry of the virus into the cell, (3) replication of the viral genome through a DNA intermediary, (4) entry of proviral DNA into the nucleus of the host cell, (5) integration of proviral DNA into the host cell genome, (6) transcription of proviral DNA to viral genomic and messenger RNA, (7) translation of viral messenger RNA to viral proteins, and (8) assembly of viral components into new virions that are released by budding from the host cell membrane. Each step in the HIV-1 replicative cycle offers a potential target for antiviral chemotherapy. Although many drugs have been developed, none appears singularly effective against all stages of HIV-1 infection. Many obstacles remain in the quest for an effective vaccine against HIV-1.
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Affiliation(s)
- B H Thiers
- Department of Dermatology, Medical University of South Carolina, Charleston 29425-2215
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Ward SG, Taylor RC, Crowe AJ, Balzarini J, De Clercq E. Assessment of thein vitro broad-spectrum antiviral activity of some selected antitumor organotin complexes. Appl Organomet Chem 1989. [DOI: 10.1002/aoc.590030509] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Thurman RB, Gerba CP, Bitton G. The molecular mechanisms of copper and silver ion disinfection of bacteria and viruses. ACTA ACUST UNITED AC 1989. [DOI: 10.1080/10643388909388351] [Citation(s) in RCA: 205] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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McKenna CE, Khawli LA, Ahmad WY, Pham P, Bongartz JP. SYNTHESIS OF α-HALOGENATED METHANEDIPHOSPHONATES1a, b. ACTA ACUST UNITED AC 1988. [DOI: 10.1080/03086648808074346] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Thurman RB, Gerba CP. Molecular mechanisms of viral inactivation by water disinfectants. ADVANCES IN APPLIED MICROBIOLOGY 1988; 33:75-105. [PMID: 3135703 DOI: 10.1016/s0065-2164(08)70205-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- R B Thurman
- Department of Microbiology, University of Arizona, Tucson 85721
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Abstract
Serendipity and random screening have been successful in producing effective antiviral agents. The increase in our knowledge of the basic biochemistry of viral replication and of virus-host interrelationships has revealed not only an understanding of the targets upon which existing antiviral agents exert their inhibitory effect, but also has uncovered new potential targets. The hope is that such molecular understanding will afford the synthesis of compounds with selective antiviral activity. A review of various viral targets which are potentially susceptible to attack, and a few approaches for development of antiviral agents are presented.
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Lang JM, Oberling F, Aleksijevic A, Falkenrodt A, Mayer S. Immunomodulation with diethyldithiocarbamate in patients with AIDS-related complex. Lancet 1985; 2:1066. [PMID: 2865540 DOI: 10.1016/s0140-6736(85)90931-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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