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Wohl BM, Smith AAA, Kryger MBL, Zelikin AN. Narrow therapeutic window of ribavirin as an inhibitor of nitric oxide synthesis is broadened by macromolecular prodrugs. Biomacromolecules 2013; 14:3916-26. [PMID: 24156371 DOI: 10.1021/bm401048s] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ribavirin (RBV), a broad-spectrum antiviral agent, is a standard medication against hepatitis C virus (HCV). However, despite the decades of clinical success, the mechanism of action of this drug against HCV remains a subject of debate. Furthermore, the appeal of this therapeutic agent is considerably lessened by unfavorable pharmacokinetics. This interdisciplinary study contributes to the understanding of intracellular effects exerted by RBV and presents a successful design of macromolecular prodrugs of RBV to achieve a safer treatment. Specifically, we demonstrate that RBV exhibits a pronounced anti-inflammatory activity in cultured macrophages as is evidenced by a 2-fold decrease in the levels of produced nitric oxide achieved using a clinically relevant concentration of this drug. However, this effect was characterized by a rather narrow therapeutic window with experimental values of EC50 and IC50 being 7 and 19 μM, respectively. Macromolecular prodrugs were obtained using an acrylate derivative of RBV, RAFT polymerization technique, and N-vinyl pyrrolidone as a partner monomer. The synthesized polymers were characterized with uniform molecular weights, relatively narrow polydispersities, and gradually increasing content of RBV. The resulting polymer therapeutics were effective in delivering their payload to the cultured macrophages and afforded a significantly wider therapeutic window, as much as >1000 μM (18-fold in relative values). Taken together, this work contributes significantly to the development of safer methods for delivery of RBV, as well as understanding the mechanism of action and origins of the side effects of this broad-spectrum antiviral agent.
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Affiliation(s)
- Benjamin M Wohl
- Department of Chemistry and ‡iNano Interdisciplinary Nanoscience Centre, Aarhus University , Aarhus 8000, Denmark
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202
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Miralles-Llumà R, Figueras A, Busqué F, Alvarez-Larena A, Balzarini J, Figueredo M, Font J, Alibés R, Maréchal JD. Synthesis, Antiviral Evaluation, and Computational Studies of Cyclobutane and CyclobuteneL-Nucleoside Analogues. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301097] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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203
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Osolodkin DI, Kozlovskaya LI, Dueva EV, Dotsenko VV, Rogova YV, Frolov KA, Krivokolysko SG, Romanova EG, Morozov AS, Karganova GG, Palyulin VA, Pentkovski VM, Zefirov NS. Inhibitors of tick-borne flavivirus reproduction from structure-based virtual screening. ACS Med Chem Lett 2013; 4:869-74. [PMID: 24900762 DOI: 10.1021/ml400226s] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 07/25/2013] [Indexed: 12/21/2022] Open
Abstract
Flaviviruses form a large family of enveloped viruses affecting millions of people over the world. To date, no specific therapy was suggested for the infected people, making the treatment exclusively symptomatic. Several attempts were performed earlier for the design of fusion inhibitors for mosquito-borne flaviviruses, whereas for the tick-borne flaviviruses such design had not been performed. We have constructed homology models of envelope glycoproteins of tick-transmitted flaviviruses with the detergent binding pocket in the open state. Molecular docking of substituted 1,4-dihydropyridines and pyrido[2,1-b][1,3,5]thiadiazines was made against these models, and 89 hits were selected for the in vitro experimental evaluation. Seventeen compounds showed significant inhibition against tick-borne encephalitis virus, Powassan virus, or Omsk hemorrhagic fever virus in the 50% plaque reduction test in PEK cells. These compounds identified through rational design are the first ones possessing reproduction inhibition activity against tick-borne flaviviruses.
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Affiliation(s)
- Dmitry I. Osolodkin
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
- FSBI Chumakov Institute of Poliomyelitis and Viral Encephalitides RAMS, Moscow
142782, Russia
- iSCALARE Laboratory, Moscow Institute of Physics and Technology, Dolgoprudny
141700, Russia
| | - Liubov I. Kozlovskaya
- FSBI Chumakov Institute of Poliomyelitis and Viral Encephalitides RAMS, Moscow
142782, Russia
| | - Evgenia V. Dueva
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
- FSBI Chumakov Institute of Poliomyelitis and Viral Encephalitides RAMS, Moscow
142782, Russia
- iSCALARE Laboratory, Moscow Institute of Physics and Technology, Dolgoprudny
141700, Russia
| | - Victor V. Dotsenko
- ChemEx Laboratory, Vladimir Dal’ East Ukrainian National University, Lugansk 91034, Ukraine
| | - Yulia V. Rogova
- FSBI Chumakov Institute of Poliomyelitis and Viral Encephalitides RAMS, Moscow
142782, Russia
| | - Konstantin A. Frolov
- ChemEx Laboratory, Vladimir Dal’ East Ukrainian National University, Lugansk 91034, Ukraine
| | - Sergey G. Krivokolysko
- ChemEx Laboratory, Vladimir Dal’ East Ukrainian National University, Lugansk 91034, Ukraine
| | | | - Alexey S. Morozov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Galina G. Karganova
- FSBI Chumakov Institute of Poliomyelitis and Viral Encephalitides RAMS, Moscow
142782, Russia
- Department of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Vladimir A. Palyulin
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
- iSCALARE Laboratory, Moscow Institute of Physics and Technology, Dolgoprudny
141700, Russia
| | - Vladimir M. Pentkovski
- iSCALARE Laboratory, Moscow Institute of Physics and Technology, Dolgoprudny
141700, Russia
| | - Nikolay S. Zefirov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
- iSCALARE Laboratory, Moscow Institute of Physics and Technology, Dolgoprudny
141700, Russia
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204
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Sakakibara N, Hamasaki T, Baba M, Demizu Y, Kurihara M, Irie K, Iwai M, Asada E, Kato Y, Maruyama T. Synthesis and evaluation of novel 3-(3,5-dimethylbenzyl)uracil analogs as potential anti-HIV-1 agents. Bioorg Med Chem 2013; 21:5900-6. [DOI: 10.1016/j.bmc.2013.06.061] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 06/25/2013] [Accepted: 06/25/2013] [Indexed: 11/15/2022]
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205
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Semioshkin A, Ilinova A, Lobanova I, Bregadze V, Paradowska E, Studzińska M, Jabłońska A, Lesnikowski ZJ. Synthesis of the first conjugates of 5-ethynyl-2′-deoxyuridine with closo-dodecaborate and cobalt-bis-dicarbollide boron clusters. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.06.100] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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206
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Kryger MBL, Wohl BM, Smith AAA, Zelikin AN. Macromolecular prodrugs of ribavirin combat side effects and toxicity with no loss of activity of the drug. Chem Commun (Camb) 2013; 49:2643-5. [PMID: 23431562 DOI: 10.1039/c3cc00315a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemi-enzymatic synthesis of ribavirin acrylate and subsequent RAFT co-polymerization with acrylic acid afforded a formulation of a broad spectrum antiviral drug which avoids accumulation in erythrocytes, the origin of the main side effect of ribavirin. In cultured macrophages the macromolecular prodrugs exhibited decreased toxicity while maintaining the anti-inflammatory action of ribavirin.
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Affiliation(s)
- Mille B L Kryger
- Interdisciplinary Nanoscience Centre (iNANO), The iNANO House, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
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207
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Gangarapu K, Manda S, Jallapally A, Thota S, Karki SS, Balzarini J, De Clercq E, Tokuda H. Synthesis of thiocarbohydrazide and carbohydrazide derivatives as possible biologically active agents. Med Chem Res 2013; 23:1046-1056. [PMID: 32214764 PMCID: PMC7080202 DOI: 10.1007/s00044-013-0684-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Accepted: 07/25/2013] [Indexed: 01/25/2023]
Abstract
Abstract A series of new β-isatin aldehyde-N,N′-thiocarbohydrazone, bis-β-isatin thiocarbohydrazones, bis-β-isatin carbohydrazones was synthesized by condensation of 5-substituted isatin with thiocarbohydrazide or carbohydrazide. The chemical structures of the newly synthesized compounds were confirmed by FT-IR, 1H NMR, and mass spectral analysis. The synthesized compounds were evaluated for in vitro antiviral activity against various strains of DNA and RNA viruses, but exhibited moderate antiviral activity compared with the reference compounds. Among all the compounds 6c exhibited the highest chemoprevention activity in a two-stage mouse-skin carcinogenesis test. Graphical abstract ![]()
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Affiliation(s)
- Kiran Gangarapu
- Department of Pharmaceutical Chemistry, Kakatiya Institute of Pharmaceutical Sciences, Pembarthy (V), Hasanparthy (M), Warangal, 506 371 AP India
- Center for Pharmaceutical Sciences, IST, JNTU, Kukatpally, Hyderabad, 500085 India
| | - Sarangapani Manda
- Department of Pharmaceutical Chemistry, University College of Pharmaceutical Sciences, Kakatiya University, Warangal, 506 009 AP India
| | - Anvesh Jallapally
- Department of Pharmaceutical Chemistry, Acharya and BM Reddy College of Pharmacy, Soldevanahalli, Bangalore, KN India
| | - Sreekanth Thota
- Department of Chemistry, Colorado State University, Fort Collins, 80523 CO USA
| | - Subhas S. Karki
- Department of Pharmaceutical Chemistry, KLE University’s College of Pharmacy, Rajajinagar, Bangalore, KN India
| | - Jan Balzarini
- Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Erik De Clercq
- Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Harukuni Tokuda
- Department of Complementary and Alternative Medicine, Clinical R&D, Graduate School of Medical Science Kanazawa University, Kanazawa, Japan
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208
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Ivanov MA, Aleksandrova LA. [Bicyclic furano[2,3-D] derivatives of pyrimidine nucleosides--synthesis and antiviral properties]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2013; 39:26-45. [PMID: 23844505 DOI: 10.1134/s1068162013010044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The methods of synthesis of furano- and pyrrolo[2,3-dlpyrimidine nucleosides as well as structure activity relationship of obtained compounds towards viruses of varicella zoster, hepatitis C, bovine viral diarrhea and some others are reviewed.
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209
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D’Errico S, Oliviero G, Borbone N, Amato J, Piccialli V, Varra M, Mayol L, Piccialli G. Synthesis of new acadesine (AICA-riboside) analogues having acyclic D-ribityl or 4-hydroxybutyl chains in place of the ribose. Molecules 2013; 18:9420-31. [PMID: 23924994 PMCID: PMC6269997 DOI: 10.3390/molecules18089420] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/19/2013] [Accepted: 08/01/2013] [Indexed: 01/15/2023] Open
Abstract
The antiviral activity of certain acyclic nucleosides drew our attention to the fact that the replacement of the furanose ring by an alkyl group bearing hydroxyl(s) could be a useful structural modification to modulate the biological properties of those nucleosides. Herein, we report on the synthesis of some novel acadesine analogues, where the ribose moiety is mimicked by a D-ribityl or by a hydroxybutyl chain.
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Affiliation(s)
- Stefano D’Errico
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, Napoli 80131, Italy; E-Mails: (S.D.); (N.B.); (J.A.); (M.P.); (L.M.); (G.P.)
| | - Giorgia Oliviero
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, Napoli 80131, Italy; E-Mails: (S.D.); (N.B.); (J.A.); (M.P.); (L.M.); (G.P.)
| | - Nicola Borbone
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, Napoli 80131, Italy; E-Mails: (S.D.); (N.B.); (J.A.); (M.P.); (L.M.); (G.P.)
| | - Jussara Amato
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, Napoli 80131, Italy; E-Mails: (S.D.); (N.B.); (J.A.); (M.P.); (L.M.); (G.P.)
| | - Vincenzo Piccialli
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia 21, Napoli 80126, Italy; E-Mail:
| | - Michela Varra
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, Napoli 80131, Italy; E-Mails: (S.D.); (N.B.); (J.A.); (M.P.); (L.M.); (G.P.)
| | - Luciano Mayol
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, Napoli 80131, Italy; E-Mails: (S.D.); (N.B.); (J.A.); (M.P.); (L.M.); (G.P.)
| | - Gennaro Piccialli
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, Napoli 80131, Italy; E-Mails: (S.D.); (N.B.); (J.A.); (M.P.); (L.M.); (G.P.)
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210
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Synthesis and anti-HIV activity of Triazolo-fused 3′,4′-cyclic and 4′-spiro nucleoside analogues. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-2375-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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211
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Aldol-type compounds from water-soluble indole-3,4-diones: synthesis, kinetics, and antiviral properties. Mol Divers 2013; 17:479-88. [PMID: 23640033 DOI: 10.1007/s11030-013-9448-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 04/22/2013] [Indexed: 10/26/2022]
Abstract
A straightforward transformation of indole-3,4-diones is reported. The reaction feasibility is evidenced by kinetic studies on a model substrate, revealing a double phase process with a first faster pseudo-first-order step (i.e., deprotonation of the dione and self-nucleophilic attack of the anion) and a subsequent slower dehydration of the intermediate. The overall process is faster at pH higher than the pK value of the investigated substrate. The biological relevance of new compounds has been assessed in vitro against herpes simplex virus type-1 (HSV-1), showing a more promising biological profile with respect to their precursors.
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212
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Meščić A, Glavač D, Osmanović A, Završnik D, Cetina M, Makuc D, Plavec J, Ametamey SM, Raić-Malić S. N-alkylated and O-alkylated regioisomers of 5-(hydroxyalkyl)pyrimidines: Synthesis and structural study. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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213
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Brock AP, Isaza R, Hunter RP, Richman LK, Montali RJ, Schmitt DL, Koch DE, Lindsay WA. Estimates of the pharmacokinetics of famciclovir and its active metabolite penciclovir in young Asian elephants (Elephas maximus). Am J Vet Res 2013; 73:1996-2000. [PMID: 23176429 DOI: 10.2460/ajvr.73.12.1996] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine plasma pharmacokinetics of penciclovir following oral and rectal administration of famciclovir to young Asian elephants (Elephas maximus). ANIMALS 6 healthy Asian elephants (5 females and 1 male), 4.5 to 9 years old and weighing 1,646 to 2,438 kg. PROCEDURES Famciclovir was administered orally or rectally in accordance with an incomplete crossover design. Three treatment groups, each comprising 4 elephants, received single doses of famciclovir (5 mg/kg, PO, or 5 or 15 mg/kg, rectally); there was a minimum 12-week washout period between subsequent famciclovir administrations. Serial blood samples were collected after each administration. Samples were analyzed for famciclovir and penciclovir with a validated liquid chromatography-mass spectroscopy assay. RESULTS Famciclovir was tolerated well for both routes of administration and underwent complete biotransformation to the active metabolite, penciclovir. Mean maximum plasma concentration of penciclovir was 1.3 μg/mL at 1.1 hours after oral administration of 5 mg/kg. Similar results were detected after rectal administration of 5 mg/kg. Mean maximum plasma concentration was 3.6 μg/mL at 0.66 hours after rectal administration of 15 mg/kg; this concentration was similar to results reported for humans receiving 7 mg/kg orally. CONCLUSIONS AND CLINICAL RELEVANCE Juvenile Asian elephants are susceptible to elephant endotheliotropic herpesvirus. Although most infections are fatal, case reports indicate administration of famciclovir has been associated with survival of 3 elephants. In Asian elephants, a dose of 8 to 15 mg of famciclovir/kg given orally or rectally at least every 8 hours may result in penciclovir concentrations that are considered therapeutic in humans.
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Affiliation(s)
- A Paige Brock
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32608, USA
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214
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Chang CK, Teng KH, Lin SW, Chang TH, Liang PH. Control activity of yeast geranylgeranyl diphosphate synthase from dimer interface through H-bonds and hydrophobic interaction. Biochemistry 2013; 52:2783-92. [PMID: 23534508 DOI: 10.1021/bi4001276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Previously we showed that yeast geranylgeranyl diphosphate synthase (GGPPS) becomes an inactive monomer when the first N-terminal helix involved in dimerization is deleted. This raises questions regarding why dimerization is required for GGPPS activity and which amino acids in the dimer interface are essential for dimerization-mediated activity. According to the GGPPS crystal structure, three amino acids (N101, N104, and Y105) located in the helix F of one subunit are near the active site of the other subunit. As presented here, when these residues were replaced individually with Ala caused insignificant activity changes, N101A/Y105A and N101A/N104A but not N104A/Y105A showed remarkably decreased k(cat) values (200-250-fold). The triple mutant N101A/N104A/Y105A displayed no detectable activity, although dimer was retained in these mutants. Because N101 and Y105 form H-bonds with H139 and R140 in the other subunit, respectively, we generated H139A/R140A double mutant and found it was inactive and became monomeric. Therefore, the multiple mutations apparently influence the integrity of the catalytic site due to the missing H-bonding network. Moreover, Met111, also on the highly conserved helix F, was necessary for dimer formation and enzyme activity. When Met111 was replaced with Glu, the negative-charged repulsion converted half of the dimer into a monomer. In conclusion, the H-bonds mainly through N101 for maintaining substrate binding stability and the hydrophobic interaction of M111 in dimer interface are essential for activity of yeast GGPPS.
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Affiliation(s)
- Chih-Kang Chang
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
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215
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GRL-0519, a novel oxatricyclic ligand-containing nonpeptidic HIV-1 protease inhibitor (PI), potently suppresses replication of a wide spectrum of multi-PI-resistant HIV-1 variants in vitro. Antimicrob Agents Chemother 2013; 57:2036-46. [PMID: 23403426 DOI: 10.1128/aac.02189-12] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
We report that GRL-0519, a novel nonpeptidic human immunodeficiency virus type 1 (HIV-1) protease inhibitor (PI) containing tris-tetrahydrofuranylurethane (tris-THF) and a sulfonamide isostere, is highly potent against laboratory HIV-1 strains and primary clinical isolates (50% effective concentration [EC50], 0.0005 to 0.0007 μM) with minimal cytotoxicity (50% cytotoxic concentration [CC50], 44.6 μM). GRL-0519 blocked the infectivity and replication of HIV-1NL4-3 variants selected by up to a 5 μM concentration of ritonavir, lopinavir, or atazanavir (EC50, 0.0028 to 0.0033 μM). GRL-0519 was also potent against multi-PI-resistant clinical HIV-1 variants isolated from patients who no longer responded to existing antiviral regimens after long-term antiretroviral therapy, highly darunavir (DRV)-resistant variants, and HIV-2ROD. The development of resistance against GRL-0519 was substantially delayed compared to other PIs, including amprenavir (APV) and DRV. The effects of nonspecific binding of human serum proteins on GRL-0519's antiviral activity were insignificant. Our analysis of the crystal structures of GRL-0519 (3OK9) and DRV (2IEN) with protease suggested that the tris-THF moiety, compared to the bis-THF moiety present in DRV, has greater water-mediated polar interactions with key active-site residues of protease and that the tris-THF moiety and paramethoxy group effectively fill the S2 and S2' binding pockets, respectively, of the protease. The present data demonstrate that GRL-0519 has highly favorable features as a potential therapeutic agent for treating patients infected with wild-type and/or multi-PI-resistant variants and that the tris-THF moiety is critical for strong binding of GRL-0519 to the HIV protease substrate binding site and appears to be responsible for its favorable antiretroviral characteristics.
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216
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Du Y, Ye H, Gill T, Wang L, Guo F, Cuconati A, Guo JT, Block TM, Chang J, Xu X. N-Alkyldeoxynojirimycin derivatives with novel terminal tertiary amide substitution for treatment of bovine viral diarrhea virus (BVDV), Dengue, and Tacaribe virus infections. Bioorg Med Chem Lett 2013; 23:2172-6. [PMID: 23453839 DOI: 10.1016/j.bmcl.2013.01.108] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 01/17/2013] [Accepted: 01/22/2013] [Indexed: 11/25/2022]
Abstract
Novel N-alkyldeoxynojirimycins (NADNJs) with two hydrophobic groups attached to a nitrogen linker on the alkyl chain were designed. A novel NADNJ containing a terminal tertiary carboxamide moiety was discovered that was a potent inhibitor against BVDV. Further optimization resulted in a structurally more stable lead compound 24 with a submicromolar EC50 against BVDV, Dengue, and Tacaribe; and low cytotoxicity.
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Affiliation(s)
- Yanming Du
- Institute for Hepatitis and Virus Research, 3805 Old Easton Road, Doylestown, PA 18902, USA.
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217
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Moore TW, Sana K, Yan D, Thepchatri P, Ndungu JM, Saindane MT, Lockwood MA, Natchus MG, Liotta DC, Plemper RK, Snyder JP, Sun A. Asymmetric synthesis of host-directed inhibitors of myxoviruses. Beilstein J Org Chem 2013; 9:197-203. [PMID: 23400228 PMCID: PMC3566758 DOI: 10.3762/bjoc.9.23] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 01/07/2013] [Indexed: 12/13/2022] Open
Abstract
High-throughput screening (HTS) previously identified benzimidazole 1 (JMN3-003) as a compound with broad antiviral activity against different influenza viruses and paramyxovirus strains. In pursuit of a lead compound from this series for development, we sought to increase both the potency and the aqueous solubility of 1. Lead optimization has achieved compounds with potent antiviral activity against a panel of myxovirus family members (EC50 values in the low nanomolar range) and much improved aqueous solubilities relative to that of 1. Additionally, we have devised a robust synthetic strategy for preparing 1 and congeners in an enantio-enriched fashion, which has allowed us to demonstrate that the (S)-enantiomers are generally 7- to 110-fold more potent than the corresponding (R)-isomers.
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Affiliation(s)
- Terry W Moore
- Emory Institute for Drug Development, Emory University, 1515 Dickey Drive, Atlanta, GA 30322, USA
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218
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Sun J, Duan R, Li H, Wu J. Synthesis and Anti-HIV Activity of Triazolo-Fused 2′,3′-Cyclic Nucleoside Analogs Prepared by an IntramolecularHuisgen1,3-Dipolar Cycloaddition. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200285] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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219
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Gallagher-Duval S, Hervé G, Sartori G, Enderlin G, Len C. Improved microwave-assisted ligand-free Suzuki–Miyaura cross-coupling of 5-iodo-2′-deoxyuridine in pure water. NEW J CHEM 2013. [DOI: 10.1039/c3nj00174a] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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220
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De Clercq E. The nucleoside reverse transcriptase inhibitors, nonnucleoside reverse transcriptase inhibitors, and protease inhibitors in the treatment of HIV infections (AIDS). ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2013; 67:317-58. [PMID: 23886005 DOI: 10.1016/b978-0-12-405880-4.00009-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The majority of the drugs currently used for the treatment of HIV infections (AIDS) belong to either of the following three classes: nucleoside reverse transcriptase inhibitors (NRTIs), nonnucleoside reverse transcriptase inhibitors (NNRTIs), and protease inhibitors (PIs). At present, there are 7 NRTIs, 5 NNRTIs, and 10 PIs approved for clinical use. They are discussed from the following viewpoints: (i) chemical formulae; (ii) mechanism of action; (iii) drug combinations; (iv) clinical aspects; (v) preexposure prophylaxis; (vi) prevention of mother-to-child transmission; (vii) their use in children; (viii) toxicity; (ix) adherence (compliance); (x) resistance; (xi) new NRTIs, NNRTIs, or PIs in (pre)clinical development; and (xii) the prospects for a "cure" of the disease.
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Affiliation(s)
- Erik De Clercq
- Rega Institute for Medical Research, KU Leuven, Leuven, Belgium.
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221
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Jackman JA, Cho NJ. Model membrane platforms for biomedicine: case study on antiviral drug development. Biointerphases 2012; 7:18. [PMID: 22589061 PMCID: PMC7099340 DOI: 10.1007/s13758-011-0018-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 12/29/2011] [Indexed: 01/28/2023] Open
Abstract
As one of the most important interfaces in cellular systems, biological membranes have essential functions in many activities such as cellular protection and signaling. Beyond their direct functions, they also serve as scaffolds to support the association of proteins involved in structural support, adhesion, and transport. Unfortunately, biological processes sometimes malfunction and require therapeutic intervention. For those processes which occur within or upon membranes, it is oftentimes difficult to study the mechanism in a biologically relevant, membranous environment. Therefore, the identification of direct therapeutic targets is challenging. In order to overcome this barrier, engineering strategies offer a new approach to interrogate biological activities at membrane interfaces by analyzing them through the principles of the interfacial sciences. Since membranes are complex biological interfaces, the development of simplified model systems which mimic important properties of membranes can enable fundamental characterization of interaction parameters for such processes. We have selected the hepatitis C virus (HCV) as a model viral pathogen to demonstrate how model membrane platforms can aid antiviral drug discovery and development. Responsible for generating the genomic diversity that makes treating HCV infection so difficult, viral replication represents an ideal step in the virus life cycle for therapeutic intervention. To target HCV genome replication, the interaction of viral proteins with model membrane platforms has served as a useful strategy for target identification and characterization. In this review article, we demonstrate how engineering approaches have led to the discovery of a new functional activity encoded within the HCV nonstructural 5A protein. Specifically, its N-terminal amphipathic, α-helix (AH) can rupture lipid vesicles in a size-dependent manner. While this activity has a number of exciting biotechnology and biomedical applications, arguably the most promising one is in antiviral medicine. Based on the similarities between lipid vesicles and the lipid envelopes of virus particles, experimental findings from model membrane platforms led to the prediction that a range of medically important viruses might be susceptible to rupturing treatment with synthetic AH peptide. This hypothesis was tested and validated by molecular virology studies. Broad-spectrum antiviral activity of the AH peptide has been identified against HCV, HIV, herpes simplex virus, and dengue virus, and many more deadly pathogens. As a result, the AH peptide is the first in class of broad-spectrum, lipid envelope-rupturing antiviral agents, and has entered the drug pipeline. In summary, engineering strategies break down complex biological systems into simplified biomimetic models that recapitulate the most important parameters. This approach is particularly advantageous for membrane-associated biological processes because model membrane platforms provide more direct characterization of target interactions than is possible with other methods. Consequently, model membrane platforms hold great promise for solving important biomedical problems and speeding up the translation of biological knowledge into clinical applications.
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Affiliation(s)
- Joshua A. Jackman
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798 Singapore
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553 Singapore
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798 Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551 Singapore
- Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553 Singapore
- Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University, 269 Campus Drive, Stanford, CA 94305 USA
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222
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Bocanegra R, Rodríguez-Huete A, Fuertes MÁ, del Álamo M, Mateu MG. Molecular recognition in the human immunodeficiency virus capsid and antiviral design. Virus Res 2012; 169:388-410. [DOI: 10.1016/j.virusres.2012.06.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 06/11/2012] [Accepted: 06/12/2012] [Indexed: 01/07/2023]
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223
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Chen K, Dou J, Tang S, Yang Y, Wang H, Fang H, Zhou C. Deletion of the aroK gene is essential for high shikimic acid accumulation through the shikimate pathway in E. coli. BIORESOURCE TECHNOLOGY 2012; 119:141-147. [PMID: 22728194 DOI: 10.1016/j.biortech.2012.05.100] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 05/21/2012] [Accepted: 05/21/2012] [Indexed: 06/01/2023]
Abstract
Shikimic acid (SA) is an important metabolic intermediate with diverse commercial applications. In this work, antisense RNA interference and gene deletion were carried out to inactivate the aroK gene in an SA-producing Escherichia coli strain, DHPYA-T7. In this strain, the aroL, ptsHIcrr and ydiB genes are deleted, and the tktA, glk, aroE and aroB genes are overexpressed. Flask cultivations of the DHPYA-T7 derivative strains showed that the accumulation of SA increased 2.69-fold after aroK gene deletion (DHPYAAS-T7) and 1.29-fold after antisense RNA interference (DHPYAS-T7). Furthermore, the activity of shikimate kinase in DHPYAAS-T7 was 0.21-fold of that in strain DHPYAS-T7. In a 10-L fermentation, SA accumulation increased to 1850 mg L(-1) in strain DHPYAAS-T7, which is a 1.5-fold increase over that in strain DHPYAS-T7. These results demonstrate that aroK gene inactivation in DHPYA-T7 leads to high SA accumulation, especially when this inactivation is caused by chromosomal deletion.
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Affiliation(s)
- Kai Chen
- School of Life Science & Technology, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, PR China
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224
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Rios Morales EH, Balzarini J, Meier C. Stereoselective synthesis and antiviral activity of methyl-substituted cycloSal-pronucleotides. J Med Chem 2012; 55:7245-52. [PMID: 22827702 DOI: 10.1021/jm3008085] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Methyl-substituted cycloSal-pronucleotides of d4TMP were synthesized with high diastereoselectivities in satisfying chemical yields. The individual diastereomers were tested against HIV-1 and HIV-2 infected wild-type CEM/0 and HIV-2 infected thymidine kinase deficient CEM cells. All diastereomers tested showed significant antiviral activity in CEM/0 and strong activity in CEM/TK(-) cell cultures. The antiviral activities were strongly dependent on the chirality at the phosphate group and the position of the methyl-group(s) in the cycloSal moiety. In CEM/TK(-) cell cultures the difference in antiviral potency was found to be 7- to 20-fold. The stability of each diastereomer was studied in aqueous phosphate buffer and in CEM/0 cell extracts. Large differences in the half-lives were found. A comparison of the relative lipophilicity of the methyl-substituted cycloSal triesters was performed based on the retention times obtained by reversed phase HPLC. The results obtained clearly confirm the importance of a diastereoselective synthesis of cycloSal-pronucleotides.
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Affiliation(s)
- Edwuin H Rios Morales
- Organic Chemistry, Department of Chemistry, Faculty of Sciences, University of Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
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225
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McEnaney PJ, Parker CG, Zhang AX, Spiegel DA. Antibody-recruiting molecules: an emerging paradigm for engaging immune function in treating human disease. ACS Chem Biol 2012; 7:1139-51. [PMID: 22758917 PMCID: PMC3401898 DOI: 10.1021/cb300119g] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Synthetic immunology, the development of synthetic systems capable of modulating and/or manipulating immunological functions, represents an emerging field of research with manifold possibilities. One focus of this area has been to create low molecular weight synthetic species, called antibody-recruiting molecules (ARMs), which are capable of enhancing antibody binding to disease-relevant cells or viruses, thus leading to their immune-mediated clearance. This article provides a thorough discussion of contributions in this area, beginning with the history of small-molecule-based technologies for modulating antibody recognition, followed by a systematic review of the various applications of ARM-based strategies. Thus, we describe ARMs capable of targeting cancer, bacteria, and viral pathogens, along with some of the scientific discoveries that have resulted from their development. Research in this area underscores the many exciting possibilities at the interface of organic chemistry and immunobiology and is positioned to advance both basic and clinical science in the years to come.
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Affiliation(s)
- Patrick J McEnaney
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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226
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Pomeisl K, Horská K, Pohl R, Blažek J, Krečmerová M. Syntheses of 1-[2-(Phosphonomethoxy)Alkyl] thymine monophosphates and an evaluation of their inhibitory activity toward human thymidine phosphorylase. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2012; 31:159-71. [PMID: 22356232 DOI: 10.1080/15257770.2011.648361] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
A series of new monophosphates of 1-[2-(phosphonomethoxy)alkyl]thymines, such as PMPTp(,) 3-MeO-PMPTp, HPMPTp, and FPMPTp, were synthesized and tested for their ability to inhibit human thymidine phosphorylase. Kinetic measurements of enzyme activity were performed using thymidine and inorganic phosphate as the substrates. The data show that some monophosphates provide a considerable increase of the multisubstrate inhibitory effect. The highest inhibitory potency was found with (R)-FPMPTp 4c (K (i) (dT) = 4.09 ± 0.47 μM, K (i)(P(i)) = 2.13 ± 0.29 μM) and (R) 3-MeO-PMPTp 4d (K (i) (dT) = 5.78 ± 0.71 μM, K (i)(P(i)) = 2.71 ± 0.37 μM).
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Affiliation(s)
- Karel Pomeisl
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. , Prague, Czech Republic.
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227
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Kozachenko AP, Shablykin OV, Brovarets VS. Synthesis of 4-alkyl-2-aryl-1,3-oxazole[5,4-d]pyrimidine-7(4H)-thiones and 6-alkyl-2-aryl-1,3-oxazole[5,4-d]pyrimidin-7(6H)-ones from 2-aroylamino-3,3-dichloroacrylonitriles. RUSS J GEN CHEM+ 2012. [DOI: 10.1134/s1070363212040226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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228
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Sun J, Liu X, Li H, Duan R, Wu J. Synthesis and Anti-HIV Activity of Triazolo-Fused 3′,5′-Cyclic Nucleoside Analogues Derived from an Intramolecular Huisgen 1,3-Dipolar Cycloaddition. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201100366] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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229
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Mohammadi H, Bienzle D. Pharmacological inhibition of feline immunodeficiency virus (FIV). Viruses 2012; 4:708-24. [PMID: 22754645 PMCID: PMC3386625 DOI: 10.3390/v4050708] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 04/18/2012] [Accepted: 04/20/2012] [Indexed: 01/10/2023] Open
Abstract
Feline immunodeficiency virus (FIV) is a member of the retroviridae family of viruses and causes an acquired immunodeficiency syndrome (AIDS) in domestic and non-domestic cats worldwide. Genome organization of FIV and clinical characteristics of the disease caused by the virus are similar to those of human immunodeficiency virus (HIV). Both viruses infect T lymphocytes, monocytes and macrophages, and their replication cycle in infected cells is analogous. Due to marked similarity in genomic organization, virus structure, virus replication and disease pathogenesis of FIV and HIV, infection of cats with FIV is a useful tool to study and develop novel drugs and vaccines for HIV. Anti-retroviral drugs studied extensively in HIV infection have targeted different steps of the virus replication cycle: (1) inhibition of virus entry into susceptible cells at the level of attachment to host cell surface receptors and co-receptors; (2) inhibition of fusion of the virus membrane with the cell membrane; (3) blockade of reverse transcription of viral genomic RNA; (4) interruption of nuclear translocation and viral DNA integration into host genomes; (5) prevention of viral transcript processing and nuclear export; and (6) inhibition of virion assembly and maturation. Despite much success of anti-retroviral therapy slowing disease progression in people, similar therapy has not been thoroughly investigated in cats. In this article we review current pharmacological approaches and novel targets for anti-lentiviral therapy, and critically assess potentially suitable applications against FIV infection in cats.
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Affiliation(s)
- Hakimeh Mohammadi
- Department of Pathobiology, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
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230
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von Kleist M, Metzner P, Marquet R, Schütte C. HIV-1 polymerase inhibition by nucleoside analogs: cellular- and kinetic parameters of efficacy, susceptibility and resistance selection. PLoS Comput Biol 2012; 8:e1002359. [PMID: 22275860 PMCID: PMC3261923 DOI: 10.1371/journal.pcbi.1002359] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 12/05/2011] [Indexed: 11/30/2022] Open
Abstract
Nucleoside analogs (NAs) are used to treat numerous viral infections and cancer. They compete with endogenous nucleotides (dNTP/NTP) for incorporation into nascent DNA/RNA and inhibit replication by preventing subsequent primer extension. To date, an integrated mathematical model that could allow the analysis of their mechanism of action, of the various resistance mechanisms, and their effect on viral fitness is still lacking. We present the first mechanistic mathematical model of polymerase inhibition by NAs that takes into account the reversibility of polymerase inhibition. Analytical solutions for the model point out the cellular- and kinetic aspects of inhibition. Our model correctly predicts for HIV-1 that resistance against nucleoside analog reverse transcriptase inhibitors (NRTIs) can be conferred by decreasing their incorporation rate, increasing their excision rate, or decreasing their affinity for the polymerase enzyme. For all analyzed NRTIs and their combinations, model-predicted macroscopic parameters (efficacy, fitness and toxicity) were consistent with observations. NRTI efficacy was found to greatly vary between distinct target cells. Surprisingly, target cells with low dNTP/NTP levels may not confer hyper-susceptibility to inhibition, whereas cells with high dNTP/NTP contents are likely to confer natural resistance. Our model also allows quantification of the selective advantage of mutations by integrating their effects on viral fitness and drug susceptibility. For zidovudine triphosphate (AZT-TP), we predict that this selective advantage, as well as the minimal concentration required to select thymidine-associated mutations (TAMs) are highly cell-dependent. The developed model allows studying various resistance mechanisms, inherent fitness effects, selection forces and epistasis based on microscopic kinetic data. It can readily be embedded in extended models of the complete HIV-1 reverse transcription process, or analogous processes in other viruses and help to guide drug development and improve our understanding of the mechanisms of resistance development during treatment. Nucleoside analogs (NAs) represent an important drug class for the treatment of viral infections and cancer. They inhibit DNA/RNA polymerization after being incorporated into nascent DNA/RNA, which prevents primer extension. Viruses are particularly versatile and frequently develop mutations enabling them to avert the effects of NAs. The mechanisms of resistance development are, however, still poorly understood. Through mathematical modeling, we assess the mechanisms by which HIV-1 can develop resistance against nucleoside analog reverse transcriptase inhibitors (NRTI). We quantify the effects of treatment and estimate the fitness of drug resistant mutants. We correctly predict that HIV-1 can develop resistance by decreasing NRTI incorporation rate, increasing its excision rate, or decreasing its affinity for the viral polymerase enzyme. Our model also allows quantification of the cell specific factors affecting NRTI efficacy. Resistance development also changes drug susceptibility distinctly and we show, for the first time, that selection of drug resistance can occur in particular target cells. This finding could provide an explanation of how clinically observed resistant viral mutants may arise. It also pin-points important parameters that may impact clinical efficacy of NAs used to treat other viruses.
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Affiliation(s)
- Max von Kleist
- Department of Mathematics and Computer Science, Free University Berlin, Berlin, Germany.
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231
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Kögler M, De Jonghe S, Herdewijn P. Synthesis of 6-aryl-2′-deoxyuridine nucleosides via a Liebeskind cross-coupling methodology. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.11.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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232
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Massarotti A, Coluccia A, Sorba G, Silvestri R, Brancale A. De novo computer-aided design of novel antiviral agents. DRUG DISCOVERY TODAY. TECHNOLOGIES 2012; 9:e175-e226. [PMID: 24064311 DOI: 10.1016/j.ddtec.2011.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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233
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Abstract
Nuclear Magnetic Resonance (NMR) techniques are widely used in the drug discovery process. The primary feature exploited in these investigations is the large difference in mass between drugs and receptors (usually proteins) and the effect this has on the rotational or translational correlation times for drugs bound to their targets. Many NMR parameters, such as the diffusion coefficient, spin diffusion, nuclear Overhauser enhancement, and transverse and longitudinal relaxation times, are strong functions of either the overall tumbling or translation of molecules in solution. This has led to the development of a wide variety of NMR techniques applicable to the elucidation of protein and nucleic acid structure in solution, the screening of drug candidates for binding to a target of choice, and the study of the conformational changes which occur in a target upon drug binding. High-throughput screening by NMR methods has recently received a boost from the introduction of sophisticated computational techniques for reducing the time needed for the acquisition of the primary NMR data for multidimensional studies.
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Affiliation(s)
- Laurel O Sillerud
- Department of Biochemistry and Molecular Biology, UNM HDC, University of New Mexico, Albuquerque, NM, USA.
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234
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Maiti M, Michielssens S, Dyubankova N, Maiti M, Lescrinier E, Ceulemans A, Herdewijn P. Influence of the Nucleobase and Anchimeric Assistance of the Carboxyl Acid Groups in the Hydrolysis of Amino Acid Nucleoside Phosphoramidates. Chemistry 2011; 18:857-68. [DOI: 10.1002/chem.201102279] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 11/04/2011] [Indexed: 11/12/2022]
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235
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Abstract
Microbicides are products that are designed for application at vaginal or rectal mucosae to inhibit or block early events in HIV infection and thereby prevent transmission of HIV. Currently, the most advanced microbicides in the development pipeline are based on highly active anti-retroviral drugs (ARVs). Significant protection of women by vaginally applied tenofovir gel, demonstrated in the CAPRISA 004 trial, has provided proof-of-concept that microbicides can be effective. The rationale for investigating ARVs and other compounds as vaginal or rectal microbicides is discussed together with approaches to improve efficacy by the development of combination microbicides and by new formulations that may increase user acceptance.
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Affiliation(s)
- C G Kelly
- King's College London, Dental Institute, London, UK.
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236
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Abstract
Essential oils from various aromatic medicinal plants are highly active against some viral infections, e.g. labial herpes caused by herpes simplex virus type 1. Balm oil, tea tree oil and peppermint oil demonstrate in vitro a significant antiherpetic activity, mainly related to a direct drug-virus particle interaction, some essential oils also act directly virucidal. Interestingly, these essential oils are also highly active against acyclovir-resistant herpes simplex virus strains. In clinical studies, tea tree oil has been shown to possess antiherpetic, anti-inflammatory and pain-relieving properties, as well as to accelerate the healing process of herpes labialis. Applying diluted essential oils three to four times daily for the antiherpetic treatment of affected areas is recommended. Some companies have marketed plant products, e.g. from Melissa, for the treatment of recurrent herpetic infections.
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Affiliation(s)
- P Schnitzler
- Department für Infektiologie, Virologie, Universität Heidelberg, Deutschland.
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237
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Lee Y, Jeong LS, Choi S, Hyeon C. Link between allosteric signal transduction and functional dynamics in a multisubunit enzyme: S-adenosylhomocysteine hydrolase. J Am Chem Soc 2011; 133:19807-15. [PMID: 22023331 DOI: 10.1021/ja2066175] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
S-adenosylhomocysteine hydrolase (SAHH), a cellular enzyme that plays a key role in methylation reactions including those required for maturation of viral mRNA, is an important drug target in the discovery of antiviral agents. While targeting the active site is a straightforward strategy of enzyme inhibition, evidence of allosteric modulation of active site in many enzymes underscores the molecular origin of signal transduction. Information of co-evolving sequences in SAHH family and the key residues for functional dynamics that can be identified using native topology of the enzyme provide glimpses into how the allosteric signaling network, dispersed over the molecular structure, coordinates intra- and intersubunit conformational dynamics. To study the link between the allosteric communication and functional dynamics of SAHHs, we performed Brownian dynamics simulations by building a coarse-grained model based on the holo and ligand-bound structures. The simulations of ligand-induced transition revealed that the signal of intrasubunit closure dynamics is transmitted to form intersubunit contacts, which in turn invoke a precise alignment of active site, followed by the dimer-dimer rotation that compacts the whole tetrameric structure. Further analyses of SAHH dynamics associated with ligand binding provided evidence of both induced fit and population shift mechanisms and also showed that the transition-state ensemble is akin to the ligand-bound state. Besides the formation of enzyme-ligand contacts at the active site, the allosteric couplings from the residues distal to the active site are vital to the enzymatic function.
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Affiliation(s)
- Yoonji Lee
- College of Pharmacy, Division of Life and Pharmaceutical Sciences and National Core Research Center for Cell Signaling and Drug Discovery Research, Ewha Womans University, Seoul 120-750, Republic of Korea
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238
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Isono Y, Sakakibara N, Ordonez P, Hamasaki T, Baba M, Ikejiri M, Maruyama T. Synthesis of 1-benzyl-3-(3,5-dimethylbenzyl)Uracil Derivatives with Potential Anti-HIV Activity. ACTA ACUST UNITED AC 2011; 22:57-65. [DOI: 10.3851/imp1844] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background: Nine novel uracil analogues were synthesized and evaluated as inhibitors of HIV-1. Methods: Key structural modifications included replacement of the 6-chloro group of 1-benzyl-6-chloro-3-(3,5-dimethylbenzyl)uracil by other functional groups or N1-alkylation of 3-(3,5-dimethylbenzyl)-5-fluorouracil. Results: These compounds showed only micromolar potency against HIV-1 in MT-4, though two of them; 6-azido-1-benzyl-3-(3,5-dimethylbenzyl) uracil and 6-amino-1-benzyl-3-(3,5-dimethylbenzyl) uracil were highly potent (half maximal effective concentration =0.067 and 0.069 μM) and selective (selectivity index =685 and 661), respectively. Structure–activity relationships among the newly synthesized uracil analogues suggest the importance of the H-bond formed between 6-amino group of 6-amino-1-benzyl-3-(3,5-dimethylbenzyl) uracil and amide group of HIV-1 reverse transcriptase. Conclusions: We discovered two 6-substituted 1-benzyl-3-(3,5-dimethylbenzyl) uracils, (6-azido-1-benzyl-3-(3,5-dimethylbenzyl) uracil and 6-amino-1-benzyl-3-(3,5-dimethylbenzyl) uracil) as novel anti-HIV agents. These compounds should be further pursued for their toxicity and pharmacokinetics in vivo as well as antiviral activity against non-nucleoside reverse transcriptase inhibitor-resistant strains.
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Affiliation(s)
- Yohei Isono
- Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, Sanuki City, Japan
| | - Norikazu Sakakibara
- Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, Sanuki City, Japan
| | - Paula Ordonez
- Division of Antiviral Chemotherapy, Center for Chronic Viral Diseases, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Takayuki Hamasaki
- Division of Antiviral Chemotherapy, Center for Chronic Viral Diseases, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Masanori Baba
- Division of Antiviral Chemotherapy, Center for Chronic Viral Diseases, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Masahiro Ikejiri
- Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Japan
| | - Tokumi Maruyama
- Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, Sanuki City, Japan
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239
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4-[1-(4-Fluorobenzyl)-4-hydroxy-1H-indol-3-yl]-2-hydroxy-4-oxobut-2-enoic acid as a prototype to develop dual inhibitors of HIV-1 integration process. Antiviral Res 2011; 92:102-7. [DOI: 10.1016/j.antiviral.2011.07.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Revised: 06/16/2011] [Accepted: 07/05/2011] [Indexed: 01/22/2023]
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240
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Jansa P, Kolman V, Kostinová A, Dračínský M, Mertlíková-Kaiserová H, Janeba Z. Efficient synthesis and biological properties of the 2′-trifluoromethyl analogues of acyclic nucleosides and acyclic nucleoside phosphonates. ACTA ACUST UNITED AC 2011. [DOI: 10.1135/cccc2011105] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Efficient and optimized procedure for the preparation of several acyclic nucleosides and acyclic nucleoside phosphonates substituted at the C-2′ position of the aliphatic part by the trifluoromethyl group is described. Trifluoromethyloxirane was found to be an excellent reagent for the introduction of the 1,1,1-trifluoropropan-2-ol moiety. Surprisingly, the next reaction of these 1,1,1-trifluoropropan-2-ols with the reagent for the introduction of the methylphosphonic residue afforded the desired phosphonates in very high yields and finally a novel simple and scalable procedure for the isolation of free phosphonic acids, after the reaction of dialkyl phosphonates with bromotrimethylsilane, was developed. Prepared compounds were evaluated for their biological properties, but none of the prepared phosphonic acids or acyclic nucleosides exhibits any antiviral, antiproliferative or anti-toxin activities.
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241
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Jansa P, Špaček P, Votruba I, Břehová P, Dračínský M, Klepetářová B, Janeba Z. Efficient one-pot synthesis of polysubstituted 6-[(1H-1,2,3-triazol-1-yl)methyl]uracils through the “click” protocol. ACTA ACUST UNITED AC 2011. [DOI: 10.1135/cccc2011074] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The preparation of several triazolo acyclic nucleosides and triazolo acyclic nucleoside phosphonates is described. The synthetic methodology has been developed as an efficient one-pot Cu(I)-catalyzed azide alkyne Huisgen “click” cycloaddition. A novel Cu(I)-catalyzed decarboxylation reaction of 1-substituted 1H-1,2,3-triazole-4-carboxylic acids at room temperature was observed and used for the preparation of 1-substituted 1H-1,2,3-triazoles. As congeners of TPI (Taiho pharmaceutical inhibitor), the prepared compounds were screened as potential inhibitors of human thymidine phosphorylase, but no inhibitory activity was observed.
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242
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Kill KA, Smith AC, Mizdalo T, Al-Mahrouq EH, Nidhi, Boyd DB. A curious conformational property of 2-amino-4-thiazolyl-methoxyimino polymers exhibiting activity against HIV-1 reverse transcriptase. Struct Chem 2011. [DOI: 10.1007/s11224-011-9853-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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243
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Abstract
Preclinical strategies that are used to identify potential drug candidates include target-based screening, phenotypic screening, modification of natural substances and biologic-based approaches. To investigate whether some strategies have been more successful than others in the discovery of new drugs, we analysed the discovery strategies and the molecular mechanism of action (MMOA) for new molecular entities and new biologics that were approved by the US Food and Drug Administration between 1999 and 2008. Out of the 259 agents that were approved, 75 were first-in-class drugs with new MMOAs, and out of these, 50 (67%) were small molecules and 25 (33%) were biologics. The results also show that the contribution of phenotypic screening to the discovery of first-in-class small-molecule drugs exceeded that of target-based approaches - with 28 and 17 of these drugs coming from the two approaches, respectively - in an era in which the major focus was on target-based approaches. We postulate that a target-centric approach for first-in-class drugs, without consideration of an optimal MMOA, may contribute to the current high attrition rates and low productivity in pharmaceutical research and development.
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244
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Morales EHR, Román CA, Thomann JO, Meier C. Linear Synthesis of Chiral cycloSal-Pronucleotides. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100334] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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245
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De Clercq E. From TIBO to Rilpivirine: The Chronicle of the Discovery of the Ideal Nonnucleoside Reverse Transcriptase Inhibitor. ANTIVIRAL DRUG STRATEGIES 2011. [DOI: 10.1002/9783527635955.ch15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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246
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247
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Bonavia A, Franti M, Pusateri Keaney E, Kuhen K, Seepersaud M, Radetich B, Shao J, Honda A, Dewhurst J, Balabanis K, Monroe J, Wolff K, Osborne C, Lanieri L, Hoffmaster K, Amin J, Markovits J, Broome M, Skuba E, Cornella-Taracido I, Joberty G, Bouwmeester T, Hamann L, Tallarico JA, Tommasi R, Compton T, Bushell SM. Identification of broad-spectrum antiviral compounds and assessment of the druggability of their target for efficacy against respiratory syncytial virus (RSV). Proc Natl Acad Sci U S A 2011; 108:6739-44. [PMID: 21502533 PMCID: PMC3084118 DOI: 10.1073/pnas.1017142108] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The search for novel therapeutic interventions for viral disease is a challenging pursuit, hallmarked by the paucity of antiviral agents currently prescribed. Targeting of viral proteins has the inextricable challenge of rise of resistance. Safe and effective vaccines are not possible for many viral pathogens. New approaches are required to address the unmet medical need in this area. We undertook a cell-based high-throughput screen to identify leads for development of drugs to treat respiratory syncytial virus (RSV), a serious pediatric pathogen. We identified compounds that are potent (nanomolar) inhibitors of RSV in vitro in HEp-2 cells and in primary human bronchial epithelial cells and were shown to act postentry. Interestingly, two scaffolds exhibited broad-spectrum activity among multiple RNA viruses. Using the chemical matter as a probe, we identified the targets and identified a common cellular pathway: the de novo pyrimidine biosynthesis pathway. Both targets were validated in vitro and showed no significant cell cytotoxicity except for activity against proliferative B- and T-type lymphoid cells. Corollary to this finding was to understand the consequences of inhibition of the target to the host. An in vivo assessment for antiviral efficacy failed to demonstrate reduced viral load, but revealed microscopic changes and a trend toward reduced pyrimidine pools and findings in histopathology. We present here a discovery program that includes screen, target identification, validation, and druggability that can be broadly applied to identify and interrogate other host factors for antiviral effect starting from chemical matter of unknown target/mechanism of action.
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Affiliation(s)
- Aurelio Bonavia
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Michael Franti
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Erin Pusateri Keaney
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Kelli Kuhen
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Mohindra Seepersaud
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Branko Radetich
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Jian Shao
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Ayako Honda
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Janetta Dewhurst
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Kara Balabanis
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - James Monroe
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Karen Wolff
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Colin Osborne
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Leanne Lanieri
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Keith Hoffmaster
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Jakal Amin
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Judit Markovits
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Michelle Broome
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Elizabeth Skuba
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Ivan Cornella-Taracido
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Gerard Joberty
- Cellzome AG, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Tewis Bouwmeester
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Lawrence Hamann
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - John A. Tallarico
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Ruben Tommasi
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Teresa Compton
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
| | - Simon M. Bushell
- Novartis Institutes for Biomedical Research, Inc., 250 Massachusetts Avenue, Cambridge, MA 02139; and
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Prasse C, Wagner M, Schulz R, Ternes TA. Biotransformation of the antiviral drugs acyclovir and penciclovir in activated sludge treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:2761-9. [PMID: 21388176 DOI: 10.1021/es103732y] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The biotransformation of the two antiviral drugs, acyclovir (ACV) and penciclovir (PCV), was investigated in contact with activated sludge. Biodegradation kinetics were determined, and transformation products (TPs) were identified using Hybrid Linear Ion Trap- FT Mass Spectrometry (LTQ Orbitrap Velos) and 1D (1H NMR, 13C NMR) and 2D (1H,1H-COSY, 1H-(13)C-HSQC) NMR Spectroscopy. ACV and PCV rapidly dissipated in the activated sludge batch systems with half-lives of 5.3 and 3.4 h and first-order rate constants in relation to the amount of suspended solids (SS) of 4.9±0.1 L gss(-1) d(-1) and 7.6±0.3 L gss(-1) d(-1), respectively. For ACV only a single TP was found, whereas eight TPs were identified for PCV. Structural elucidation of TPs exhibited that transformation only took place at the side chain leaving the guanine moiety unaltered. The oxidation of the primary hydroxyl group in ACV resulted in the formation of carboxy-acyclovir (Carboxy-ACV). For PCV, transformation was more diverse with several enzymatic reactions taking place such as the oxidation of terminal hydroxyl groups and β-oxidation followed by acetate cleavage. Analysis of different environmental samples revealed the presence of Carboxy-ACV in surface and drinking water with concentrations up to 3200 ng L(-1) and 40 ng L(-1), respectively.
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Trakossas S, Coutouli-Argyropoulou E, Hadjipavlou-Litina DJ. Synthesis of modified triazole nucleosides possessing one or two base moieties via a click chemistry approach. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.145] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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250
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Colomer JP, Moyano EL. New application of heterocyclic diazonium salts. Synthesis of pyrazolo[3,4-d][1,2,3]triazin-4-ones and imidazo[4,5-d][1,2,3]triazin-4-ones. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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