51
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Mphahlele MJ. 2,6,8-Triaryl-3-iodoquinolin-4(1 H)-ones as Substrates for the Synthesis of 2,3,6,8-Tetraarylquinolin-4(1 H)-ones and the 2-Substituted 4,6,8-Triaryl-1 H-furo[3,2- c]quinolines. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Malose J. Mphahlele
- Department of Chemistry, College of Science, Engineering and Technology; University of South Africa; P.O. Box 392 Pretoria 0003 South Africa
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52
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Bhat SA, Ahmad S. Quantum chemical and spectroscopic investigations of 4-Hydroxy-7-methyl-1,8-naphthyridine-3-carboxylic acid. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2016. [DOI: 10.1142/s0219633616500425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The FTIR (4000–400[Formula: see text]cm[Formula: see text]) and the FT-Raman spectra (4000–50[Formula: see text]cm[Formula: see text]) of 4-Hydroxy-7-methyl-1,8-naphthyridine-3-carboxylic acid are recorded and investigated. The spectra are interpreted using anharmonic frequency computations by VPT2, VSCF and PT2-VSCF methods within DFT/6-311G(d,p) framework. The root mean square (RMS) values indicate that VSCF computed frequencies are in close agreement with the observed frequencies. The combination and overtone bands are also identified in the FTIR spectrum. The intermolecular O-H[Formula: see text]O hydrogen bonding interactions are discussed in the dimer structure of the molecule. The magnitudes of the coupling between pair of modes are also computed. The electronic spectra in water and ethanol solvents are analyzed using TD-B3LYP/6-311[Formula: see text]G(d,p) level of theory. Molecular electrostatic potential (MEP) and HOMO-LUMO analysis are also performed.
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Affiliation(s)
- Sheeraz Ahmad Bhat
- Department of Physics, Aligarh Muslim University, Aligarh-U.P202002, India
| | - Shabbir Ahmad
- Department of Physics, Aligarh Muslim University, Aligarh-U.P202002, India
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53
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Samzadeh-Kermani A. Heteropolyacid catalyzed formation of thioparabanic acid derivatives. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1774-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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54
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Recent advances in the identification of Tat-mediated transactivation inhibitors: progressing toward a functional cure of HIV. Future Med Chem 2016; 8:421-42. [PMID: 26933891 DOI: 10.4155/fmc.16.3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The current anti-HIV combination therapy does not eradicate the virus that persists mainly in quiescent infected CD4(+) T cells as a latent integrated provirus that resumes after therapy interruption. The Tat-mediated transactivation (TMT) is a critical step in the HIV replication cycle that could give the opportunity to reduce the size of latent reservoirs. More than two decades of research led to the identification of various TMT inhibitors. While none of them met the criteria to reach the market, the search for a suitable TMT inhibitor is still actively pursued. Really promising compounds, including one in a Phase III clinical trial, have been recently identified, thus warranting an update.
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55
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56
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Novel Cu(0)–Fe3O4@SiO2/NH2cel as an Efficient and Sustainable Magnetic Catalyst for the Synthesis of 1,4-Disubstituted-1,2,3-triazoles and 2-Substituted-Benzothiazoles via One-Pot Strategy in Aqueous Media. Catal Letters 2016. [DOI: 10.1007/s10562-015-1672-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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57
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Dumonteil G, Hiebel MA, Scherrmann MC, Berteina-Raboin S. Iodine-catalyzed formation of substituted 2-aminobenzothiazole derivatives in PEG400. RSC Adv 2016. [DOI: 10.1039/c6ra15971k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An iodine-catalyzed formation of substituted 2-aminobenzothiazole derivatives is herein described using hydrogen peroxide as an oxidant in PEG400.
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Affiliation(s)
- G. Dumonteil
- Institut de Chimie Organique et Analytique
- Université d'Orléans
- UMR CNRS 7311
- 45067 Orléans Cedex
- France
| | - M.-A. Hiebel
- Institut de Chimie Organique et Analytique
- Université d'Orléans
- UMR CNRS 7311
- 45067 Orléans Cedex
- France
| | | | - S. Berteina-Raboin
- Institut de Chimie Organique et Analytique
- Université d'Orléans
- UMR CNRS 7311
- 45067 Orléans Cedex
- France
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58
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Tazeem T, Han X, Zhou Q, Wei J, Tien P, Yang G, Wu S, Dong C. A facile one-pot multi-component synthesis of novel adamantine substituted imidazo[1,2-a]pyridine derivatives: identification and structure–activity relationship study of their anti-HIV-1 activity. RSC Adv 2016. [DOI: 10.1039/c6ra17656a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A series of adamantine substituted imidazo[1,2-a]pyridine derivatives were developed through a one-pot multi-component Groebke–Blackburn–Bienaymé reaction, among them several compounds were identified to be the potent inhibitors against HIV-1 cells.
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Affiliation(s)
- Tazeem Tazeem
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Xin Han
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Qingjun Zhou
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- Hubei University
- Wuhan 430062
- China
| | - Jingchen Wei
- Department of Pharmacology
- Guilin Medical University
- Guilin
- China
| | - Po Tien
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Guichun Yang
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- Hubei University
- Wuhan 430062
- China
| | - Shuwen Wu
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Chune Dong
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals
- Wuhan University School of Pharmaceutical Sciences
- Wuhan 430071
- China
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59
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Pola S, Bhongiri Y, Jadhav R, Ch P, G. V. Synthesis of new fused heterocyclic aromatic hydrocarbons via C–S and C–C bond formation by C–H bond activation in the presence of new Pd(ii) Schiff's base complexes. RSC Adv 2016. [DOI: 10.1039/c6ra15609f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Pd(ii) Schiff base macrocyclic complexes are used as photocatalysts with high stability, C–S bond and intramolecular C–H bond activation under visible light irradiation.
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Affiliation(s)
- Someshwar Pola
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
| | - Yadagiri Bhongiri
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
| | - Ramchander Jadhav
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
| | - Prabhakar Ch
- Department of Chemistry
- National Institute of Technology
- Kurukshetra
- India
| | - Venkanna G.
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
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60
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Sancineto L, Mariotti A, Bagnoli L, Marini F, Desantis J, Iraci N, Santi C, Pannecouque C, Tabarrini O. Design and Synthesis of DiselenoBisBenzamides (DISeBAs) as Nucleocapsid Protein 7 (NCp7) Inhibitors with anti-HIV Activity. J Med Chem 2015; 58:9601-14. [PMID: 26613134 DOI: 10.1021/acs.jmedchem.5b01183] [Citation(s) in RCA: 137] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The interest in the synthesis of Se-containing compounds is growing with the discovery of derivatives exhibiting various biological activities. In this manuscript, we have identified a series of 2,2'-diselenobisbenzamides (DISeBAs) as novel HIV retroviral nucleocapsid protein 7 (NCp7) inhibitors. Because of its pleiotropic functions in the whole viral life cycle and its mutation intolerant nature, NCp7 represents a target of great interest which is not reached by any anti-HIV agent in clinical use. Using the diselenobisbenzoic scaffold, amino acid, and benzenesulfonamide derivatives were prepared and biologically profiled against different models of HIV infection. The incorporation of amino acids such as glycine and glutamate into DISeBAs 7 and 8 resulted in selective anti-HIV activity against both acutely and chronically infected cells as well as an interesting virucidal effect. DISeBAs demonstrated broad antiretroviral activity, encompassing HIV-1 drug-resistant strains including clinical isolates, as well as simian immunodeficiency virus (SIV). Time of addition experiments, along with the observed dose dependent inhibition of the Gag precursor proper processing, confirmed that their mechanism of action is based on NCp7 inhibition.
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Affiliation(s)
- Luca Sancineto
- Department of Pharmaceutical Sciences, Group of Catalysis and Organic Green Chemistry, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
| | - Alice Mariotti
- Department of Pharmaceutical Sciences, Group of Catalysis and Organic Green Chemistry, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
| | - Luana Bagnoli
- Department of Pharmaceutical Sciences, Group of Catalysis and Organic Green Chemistry, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
| | - Francesca Marini
- Department of Pharmaceutical Sciences, Group of Catalysis and Organic Green Chemistry, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
| | - Jenny Desantis
- Department of Pharmaceutical Sciences, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
| | - Nunzio Iraci
- Department of Pharmaceutical Sciences, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
| | - Claudio Santi
- Department of Pharmaceutical Sciences, Group of Catalysis and Organic Green Chemistry, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
| | - Christophe Pannecouque
- Department of Microbiology and Immunology, Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, KU Leuven , B-3000 Leuven, Belgium
| | - Oriana Tabarrini
- Department of Pharmaceutical Sciences, University of Perugia , Via del Liceo 1, Perugia 06100, Italy
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61
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Direct C–H arylation of benzothiazoles by magnetically separable nano copper ferrite, a recyclable catalyst. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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62
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Reusable proline-based ionic liquid catalyst for the simple synthesis of 2-arylbenzothiazoles in a biomass medium. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2133-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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63
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Abstract
Antiretroviral therapy (ART) potently suppresses HIV-1 replication, but the virus persists in quiescent infected CD4(+)T cells as a latent integrated provirus, and patients must indefinitely remain on therapy. If ART is terminated, these integrated proviruses can reactivate, driving new rounds of infection. A functional cure for HIV requires eliminating low-level ongoing viral replication that persists in certain tissue sanctuaries and preventing viral reactivation. The HIV Tat protein plays an essential role in HIV transcription by recruiting the kinase activity of the P-TEFb complex to the viral mRNA's stem-bulge-loop structure, TAR, activating transcriptional elongation. Because the Tat-mediated transactivation cascade is critical for robust HIV replication, the Tat/TAR/P-TEFb complex is one of the most attractive targets for drug development. Importantly, compounds that interfere with transcription could impair viral reactivation, low-level ongoing replication, and replenishment of the latent reservoir, thereby reducing the size of the latent reservoir pool. Here, we discuss the potential importance of transcriptional inhibitors in the treatment of latent HIV-1 disease and review recent findings on targeting Tat, TAR, and P-TEFb individually or as part of a complex. Finally, we discuss the impact of extracellular Tat in HIV-associated neurocognitive disorders and cancers.
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64
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McDonald SL, Hendrick CE, Bitting KJ, Wang Q. Copper-Catalyzed Electrophilic Amination of Heteroaromatic and Aromatic C-H Bonds via TMPZnCl•LiCl Mediated Metalation. ACTA ACUST UNITED AC 2015; 92:356-372. [PMID: 28579651 DOI: 10.15227/orgsyn.092.0356] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Stacey L McDonald
- Department of Chemistry, Duke University Durham, NC 27708-0346 (USA)
| | | | - Katie J Bitting
- Department of Chemistry, Duke University Durham, NC 27708-0346 (USA)
| | - Qiu Wang
- Department of Chemistry, Duke University Durham, NC 27708-0346 (USA)
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65
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Miliutina M, Ivanov A, Ejaz SA, Iqbal J, Villinger A, Iaroshenko VO, Langer P. Diversity oriented synthesis of 6-nitro- and 6-aminoquinolones and their activity as alkaline phosphatase inhibitors. RSC Adv 2015. [DOI: 10.1039/c5ra10948e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The novel quinolone derivatives synthesized by cyclization of α,β-ynones with primary amines were shown to be promising TNAP and IAP inhibitors.
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Affiliation(s)
| | - Anton Ivanov
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
| | - Syeda Abida Ejaz
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad
- Pakistan
| | - Jamshed Iqbal
- Centre for Advanced Drug Research
- COMSATS Institute of Information Technology
- Abbottabad
- Pakistan
| | | | - Viktor O. Iaroshenko
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
- National Taras Shevchenko University
| | - Peter Langer
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
- Leibniz Institut für Katalyse an der Universität Rostock e.V
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66
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Varun BV, Prabhu KR. Regioselective Thiolation of Arenes and Heteroarenes: C–H Functionalization Strategy for C–S Bond Formation. J Org Chem 2014; 79:9655-68. [DOI: 10.1021/jo501793q] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Begur Vasanthkumar Varun
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
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67
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Satish G, Reddy KHV, Anil B, Shankar J, Uday Kumar R, Nageswar Y. Direct C–H amination of benzothiazoles by magnetically recyclable CuFe2O4 nanoparticles under ligand-free conditions. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.07.100] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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68
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Jang S, Hyun S, Kim S, Lee S, Lee IS, Baba M, Lee Y, Yu J. Cell-Penetrating, Dimeric α-Helical Peptides: Nanomolar Inhibitors of HIV-1 Transcription. Angew Chem Int Ed Engl 2014; 53:10086-9. [DOI: 10.1002/anie.201404684] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Indexed: 11/10/2022]
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69
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Jang S, Hyun S, Kim S, Lee S, Lee IS, Baba M, Lee Y, Yu J. Cell-Penetrating, Dimeric α-Helical Peptides: Nanomolar Inhibitors of HIV-1 Transcription. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404684] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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70
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Sancineto L, Iraci N, Barreca ML, Massari S, Manfroni G, Corazza G, Cecchetti V, Marcello A, Daelemans D, Pannecouque C, Tabarrini O. Exploiting the anti-HIV 6-desfluoroquinolones to design multiple ligands. Bioorg Med Chem 2014; 22:4658-66. [PMID: 25127466 DOI: 10.1016/j.bmc.2014.07.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 07/10/2014] [Accepted: 07/14/2014] [Indexed: 10/25/2022]
Abstract
It is getting clearer that many drugs effective in different therapeutic areas act on multiple rather than single targets. The application of polypharmacology concepts might have numerous advantages especially for disease such as HIV/AIDS, where the rapid emergence of resistance requires a complex combination of more than one drug. In this paper, we have designed three hybrid molecules combining WM5, a quinolone derivative we previously identified as HIV Tat-mediated transcription (TMT) inhibitor, with the tricyclic core of nevirapine and BILR 355BS (BILR) non-nucleoside reverse transcriptase inhibitors (NNRTIs) to investigate whether it could be possible to obtain molecules acting on both transcription steps of the HIV replicative cycle. One among the three designed multiple ligands, reached this goal. Indeed, compound 1 inhibited both TMT and reverse transcriptase (RT) activity. Unexpectedly, while the anti-TMT activity exerted by compound 1 resulted into a selective inhibition of HIV-1 reactivation from latently infected OM10.1 cells, the anti-RT properties shown by all of the synthesized compounds did not translate into an anti-HIV activity in acutely infected cells. Thus, we have herein produced the proof of concept that the design of dual TMT-RT inhibitors is indeed possible, but optimization efforts are needed to obtain more potent derivatives.
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Affiliation(s)
- Luca Sancineto
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Nunzio Iraci
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Maria Letizia Barreca
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Serena Massari
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Giuseppe Manfroni
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Gianmarco Corazza
- Laboratory of Molecular Virology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano 99, 34149 Trieste, Italy
| | - Violetta Cecchetti
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Alessandro Marcello
- Laboratory of Molecular Virology, International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano 99, 34149 Trieste, Italy
| | - Dirk Daelemans
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - Christophe Pannecouque
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
| | - Oriana Tabarrini
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy.
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71
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Donalisio M, Massari S, Argenziano M, Manfroni G, Cagno V, Civra A, Sabatini S, Cecchetti V, Loregian A, Cavalli R, Lembo D, Tabarrini O. Ethyl 1,8-Naphthyridone-3-carboxylates Downregulate Human Papillomavirus-16 E6 and E7 Oncogene Expression. J Med Chem 2014; 57:5649-63. [DOI: 10.1021/jm500340h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manuela Donalisio
- Department
of Clinical and Biological Sciences, University of Torino, 10043 Orbassano, Torino, Italy
| | - Serena Massari
- Department
of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy
| | - Monica Argenziano
- Department
of Drug Science and Technology, University of Torino, 10125 Torino, Italy
| | - Giuseppe Manfroni
- Department
of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy
| | - Valeria Cagno
- Department
of Clinical and Biological Sciences, University of Torino, 10043 Orbassano, Torino, Italy
| | - Andrea Civra
- Department
of Clinical and Biological Sciences, University of Torino, 10043 Orbassano, Torino, Italy
| | - Stefano Sabatini
- Department
of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy
| | - Violetta Cecchetti
- Department
of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy
| | - Arianna Loregian
- Department
of Molecular Medicine, University of Padova, 35121 Padova, Italy
| | - Roberta Cavalli
- Department
of Drug Science and Technology, University of Torino, 10125 Torino, Italy
| | - David Lembo
- Department
of Clinical and Biological Sciences, University of Torino, 10043 Orbassano, Torino, Italy
| | - Oriana Tabarrini
- Department
of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy
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72
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McDonald SL, Hendrick CE, Wang Q. Copper-catalyzed electrophilic amination of heteroarenes and arenes by C-H zincation. Angew Chem Int Ed Engl 2014; 53:4667-70. [PMID: 24668522 PMCID: PMC4668583 DOI: 10.1002/anie.201311029] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 02/21/2014] [Indexed: 01/28/2023]
Abstract
Direct amination of heteroarenes and arenes has been achieved in a one-pot CH zincation/copper-catalyzed electrophilic amination procedure. This amination method provides an efficient and rapid approach to access a diverse range of heteroaromatic and aromatic amines including those previously inaccessible using CH amination methods. The mild reaction conditions and good functional-group compatibility demonstrate its great potential for the synthesis of important and complex amines.
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Affiliation(s)
| | | | - Qiu Wang
- Department of Chemistry, Duke University Durham, NC 27708-0346 (USA)
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73
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Renjith R, Mary YS, Panicker CY, Varghese HT, Pakosińska-Parys M, Alsenoy CV, Manojkumar TK. Vibrational spectroscopic and computational study of 1,7,8,9-Tetrachloro-4-(4-bromo-butyl)-10,10-dimethoxy-4-aza-tricyclo[5.2.1.0(2,6)] dec-8-ene-3,5-dione. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 124:480-491. [PMID: 24508886 DOI: 10.1016/j.saa.2014.01.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 12/17/2013] [Accepted: 01/10/2014] [Indexed: 06/03/2023]
Abstract
The optimized molecular structure, vibrational frequencies, corresponding vibrational assignments of 1,7,8,9-Tetrachloro-4-(4-bromo-butyl)-10,10-dimethoxy-4-aza-tricyclo[5.2.1.0(2,6)] dec-8-ene-3,5-dione (TDAD) have been investigated experimentally and theoretically using Gaussian09 software package. Potential energy distribution of normal modes of vibrations was done using GAR2PED program. Gauge-including atomic orbital (1)H NMR chemical shifts calculations were carried out and compared with experimental data. The HOMO and LUMO analysis is used to determine the charge transfer within the molecule. The stability of the molecule arising from hyper-conjugative interaction and charge delocalization has been analyzed using NBO analysis. Molecular Electrostatic Potential was performed by the DFT method and infrared intensities and Raman activities are also reported. Mulliken's net charges have been calculated and compared with the atomic natural charges. First hyperpolarizability is calculated in order to find its role in non-liner optics. The calculated geometrical parameters are in agreement with that of similar derivatives.
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Affiliation(s)
- R Renjith
- Department of Physics, TKM College of Arts and Science, Kollam, Kerala, India
| | - Y Sheena Mary
- Department of Physics, Fatima Mata National College, Kollam, Kerala, India
| | - C Yohannan Panicker
- Department of Physics, TKM College of Arts and Science, Kollam, Kerala, India.
| | | | | | - C Van Alsenoy
- Department of Chemistry, University of Antwerp, B2610 Antwerp, Belgium
| | - T K Manojkumar
- Indian Institute of Information Technology and Management-Kerala, Technopark Campus, Trivandrum, Kerala, India
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74
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Royle CM, Tsai MH, Tabarrini O, Massari S, Graham DR, Aquino VN, Boasso A. Modulation of HIV-1-induced activation of plasmacytoid dendritic cells by 6-desfluoroquinolones. AIDS Res Hum Retroviruses 2014; 30:345-54. [PMID: 24229417 PMCID: PMC3976578 DOI: 10.1089/aid.2013.0154] [Citation(s) in RCA: 3] [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] Open
Abstract
Chronic activation of plasmacytoid dendritic cells (pDCs) is an important contributor to the immunopathogenesis of HIV infection. The quinolone derivative chloroquine (CQ) prevents endosomal acidification, required for toll-like receptor sensing of HIV by pDCs, and is currently under clinical trial as an immunotherapeutic approach. We tested three different 6-desfluoroquinolones (6-DFQs), structurally related to CQ and endowed with antiretroviral activity, for their ability to inhibit HIV-induced pDC activation and interferon (IFN)-α production in peripheral blood mononuclear cells (PBMCs) in vitro. PBMCs from six healthy donors were cultured overnight with aldrithiol-2 (AT-2)-inactivated HIV-1MN in the presence or absence of 6-DFQs or CQ. IFN-α production was measured by ELISA; pDC and monocyte activation was analyzed by flow cytometry. Incubation with HIV labeled with the fluorescent dye DyLight-488 (DL488) was used to test virus uptake by flow cytometry. We found that the 6-DFQs effectively inhibited HIV-induced IFN-α similar to CQ, but only 6-DFQs also inhibited the upregulation of the pDC activation marker CD83. Interestingly, HIV-induced expression of the costimulatory molecule CD80 and, to a lesser extent CD86, was further enhanced on pDCs by 6-DFQs, but not CQ. Conversely, 6-DFQs and CQ had similar inhibitory effects on HIV-induced monocyte activation, consistent with the primary mechanism being associated with IFN-α signaling. Finally, 6-DFQs interfered with HIV interaction with pDCs and monocytes, but not myeloid DCs. Our data indicate that 6-DFQs may interfere with pDC-mediated and IFN-α-dependent immunopathogenesis while supporting pDC differentiation into mature antigen-presenting cells by favoring expression of costimulatory molecules.
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Affiliation(s)
- Caroline M. Royle
- Immunology Section, Chelsea and Westminster Hospital, Division of Infectious Diseases, Department of Medicine, Faculty of Medicine, Imperial College, London, United Kingdom
| | - Ming-Han Tsai
- Immunology Section, Chelsea and Westminster Hospital, Division of Infectious Diseases, Department of Medicine, Faculty of Medicine, Imperial College, London, United Kingdom
| | - Oriana Tabarrini
- Dipartimento di Chimica e Tecnologia del Farmaco, Facoltà di Farmacia, Università degliStudi di Perugia, Perugia, Italy
| | - Serena Massari
- Dipartimento di Chimica e Tecnologia del Farmaco, Facoltà di Farmacia, Università degliStudi di Perugia, Perugia, Italy
| | - David R. Graham
- Retrovirus Laboratory, Department of Molecular and Comparative Pathobiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Veronica N. Aquino
- Retrovirus Laboratory, Department of Molecular and Comparative Pathobiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Adriano Boasso
- Immunology Section, Chelsea and Westminster Hospital, Division of Infectious Diseases, Department of Medicine, Faculty of Medicine, Imperial College, London, United Kingdom
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75
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McDonald SL, Hendrick CE, Wang Q. Copper-Catalyzed Electrophilic Amination of Heteroarenes and Arenes by CH Zincation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201311029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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76
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An efficient sonochemical synthesis of novel Schiff's bases, thiazolidine, and pyrazolidine incorporating 1,8-naphthyridine moiety and their cytotoxic activity against HePG2 cell lines. ScientificWorldJournal 2014; 2014:587059. [PMID: 24723815 PMCID: PMC3956519 DOI: 10.1155/2014/587059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 01/03/2014] [Indexed: 11/18/2022] Open
Abstract
Novel Schiff's bases 4a-e, 5a, 5b, and 6, thiazolidine 7a-d, and pyrazolidine 8 have been synthesized using the versatile synthon 4-hydroxy-2,7-dimethyl-1,8-naphthyridine 1. Reactions carried out under ultrasound irradiation showed higher rates and yields than those done under silent conditions. The newly synthesized compounds were evaluated for HepG2 cell growth inhibition. The results obtained revealed that the tested compounds possess inhibitory effect on the growth of HepG2 liver cancer cells. The results were compared to doxorubicin as a reference drug (IC50: 0.04). Compounds 4a and 7b showed the highest inhibition activity against the HepG2 cell line (IC50: 0.047 and 0.041 µM, resp.) among all the tested compounds.
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77
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Zhu TH, Xu XP, Cao JJ, Wei TQ, Wang SY, Ji SJ. Cobalt(II)-Catalyzed Isocyanide Insertion Reaction with Amines under Ultrasonic Conditions: A Divergent Synthesis of Ureas, Thioureas and Azaheterocycles. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300745] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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78
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Zeng W, Dang P, Zhang X, Liang Y, Peng C. Copper-catalyzed synthesis of 2-aminobenzothiazoles from carbodiimide and sodium hydrosulfide. RSC Adv 2014. [DOI: 10.1039/c4ra04047c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Copper-catalyzed a coupling/addition tandem reaction for the synthesis of 2-aminobenzothiazoles from o-haloarylcarboniimide and NaHS.
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Affiliation(s)
- Weilan Zeng
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Hunan Normal University
- Changsha, China
| | - Pan Dang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Hunan Normal University
- Changsha, China
| | - Xiaoyun Zhang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Hunan Normal University
- Changsha, China
| | - Yun Liang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Hunan Normal University
- Changsha, China
| | - Caiyun Peng
- School of Pharmaceutical Science
- Hunan University of Chinese Medicine
- Changsha, China
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79
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Synthesis of 1,8-Naphthyridine Derivatives under Ultrasound Irradiation and Cytotoxic Activity against HepG2 Cell Lines. J CHEM-NY 2014. [DOI: 10.1155/2014/126323] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Novel pyrazole derivatives3a,b,5, 1,3,4-oxadiazole6, 1,3,4-thiadiazole8, and 1,2,4-triazole9a–cincorporated into 1,8-naphthyridine have been synthesized using the versatile synthon 2-(2,7-dimethyl-1,8-naphthyridin-4-yloxy) acetohydrazide1. An improvement in rates and yields was observed when the reactions were carried out under ultrasonic irradiation compared with the classical synthesis. The newly synthesized compounds were evaluated for HepG2 cell growth inhibition. The results obtained revealed that the tested compounds possess inhibitory effect on the growth of HepG2 liver cancer cells. The results were compared to doxorubicin (DOX) as a reference drug (IC50 : 0.04 μM). Compounds9bshowed the highest inhibition activity against HepG2 cell line (IC50 : 0.048 μM) among all tested compounds.
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80
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Mohammadi M, Bardajee GR, Pesyan NN. A novel method for the synthesis of benzothiazole heterocycles catalyzed by a copper–DiAmSar complex loaded on SBA-15 in aqueous media. RSC Adv 2014. [DOI: 10.1039/c4ra11877d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cu(ii)–DiAmSar/SBA-15 was prepared and used as an efficient heterogeneous catalyst for the synthesis of benzothiazole heterocycles in aqueous media.
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Affiliation(s)
- Marzieh Mohammadi
- Department of Chemistry
- Faculty of Science
- Urmia University
- 57159 Urmia, Iran
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81
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Harsha Vardhan Reddy K, Anil Kumar BSP, Prakash Reddy V, Uday Kumar R, Nageswar YVD. Ru/C: a simple heterogeneous catalyst for the amination of azoles under ligand free conditions. RSC Adv 2014. [DOI: 10.1039/c4ra05447d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
A ligand free Ru/C-catalyzed amination of 2-halo azoles with a broad scope of aminating reagents has been developed. Utilizing this protocol a variety of 2-aminoazole derivatives were synthesized in moderate to good yields. The methodology is operationally simple and it provides potentially useful products by using an inexpensive recyclable catalytic system.
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Affiliation(s)
| | | | - V. Prakash Reddy
- MCP Division
- Indian Institute of Chemical Technology
- Hyderabad 500607, India
| | - R. Uday Kumar
- MCP Division
- Indian Institute of Chemical Technology
- Hyderabad 500607, India
| | - Y. V. D. Nageswar
- MCP Division
- Indian Institute of Chemical Technology
- Hyderabad 500607, India
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82
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Iron-catalyzed arylation or aroylation of benzothiazoles with benzylic alcohols and aryl ketones. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.078] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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83
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Sancineto L, Iraci N, Massari S, Attanasio V, Corazza G, Barreca ML, Sabatini S, Manfroni G, Avanzi NR, Cecchetti V, Pannecouque C, Marcello A, Tabarrini O. Computer-Aided Design, Synthesis and Validation of 2-Phenylquinazolinone Fragments as CDK9 Inhibitors with Anti-HIV-1 Tat-Mediated Transcription Activity. ChemMedChem 2013; 8:1941-53. [DOI: 10.1002/cmdc.201300287] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Indexed: 12/20/2022]
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84
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Van Lint C, Bouchat S, Marcello A. HIV-1 transcription and latency: an update. Retrovirology 2013; 10:67. [PMID: 23803414 PMCID: PMC3699421 DOI: 10.1186/1742-4690-10-67] [Citation(s) in RCA: 246] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 05/29/2013] [Indexed: 12/11/2022] Open
Abstract
Combination antiretroviral therapy, despite being potent and life-prolonging, is not curative and does not eradicate HIV-1 infection since interruption of treatment inevitably results in a rapid rebound of viremia. Reactivation of latently infected cells harboring transcriptionally silent but replication-competent proviruses is a potential source of persistent residual viremia in cART-treated patients. Although multiple reservoirs may exist, the persistence of resting CD4+ T cells carrying a latent infection represents a major barrier to eradication. In this review, we will discuss the latest reports on the molecular mechanisms that may regulate HIV-1 latency at the transcriptional level, including transcriptional interference, the role of cellular factors, chromatin organization and epigenetic modifications, the viral Tat trans-activator and its cellular cofactors. Since latency mechanisms may also operate at the post-transcriptional level, we will consider inhibition of nuclear RNA export and inhibition of translation by microRNAs as potential barriers to HIV-1 gene expression. Finally, we will review the therapeutic approaches and clinical studies aimed at achieving either a sterilizing cure or a functional cure of HIV-1 infection, with a special emphasis on the most recent pharmacological strategies to reactivate the latent viruses and decrease the pool of viral reservoirs.
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Affiliation(s)
- Carine Van Lint
- Université Libre de Bruxelles (ULB), Service of Molecular Virology, Institute of Molecular Biology and Medicine, 12, Rue des Profs Jeener et Brachet, 6041, Gosselies, Belgium.
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85
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Massari S, Mercorelli B, Sancineto L, Sabatini S, Cecchetti V, Gribaudo G, Palù G, Pannecouque C, Loregian A, Tabarrini O. Design, synthesis, and evaluation of WC5 analogues as inhibitors of human cytomegalovirus Immediate-Early 2 protein, a promising target for anti-HCMV treatment. ChemMedChem 2013; 8:1403-14. [PMID: 23757191 DOI: 10.1002/cmdc.201300106] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/16/2013] [Indexed: 12/13/2022]
Abstract
Although human cytomegalovirus (HCMV) infection is mostly asymptomatic for immunocompetent individuals, it remains a serious threat for those who are immunocompromised, in whom it is associated with various clinical manifestations. The therapeutic utility of the few available anti-HCMV drugs is limited by several drawbacks, including cross-resistance due to their common mechanism of action, i.e., inhibition of viral DNA polymerase. Therefore, compounds that target other essential viral events could overcome this problem. One example of this is the 6-aminoquinolone WC5, which acts by directly blocking the transactivation of essential viral Early genes by the Immediate-Early 2 (IE2) protein. In this study, the quinolone scaffold of the lead compound WC5 was investigated in depth, defining more suitable substituents for each of the scaffold positions explored and identifying novel, potent and nontoxic compounds. Some compounds showed potent anti-HCMV activity by interfering with IE2-dependent viral E gene expression. Among them, naphthyridone 1 was also endowed with potent anti-HIV activity in latently infected cells. Their antiviral profile along with their innovative mechanism of action make these anti-HCMV quinolones a very promising class of compounds to be exploited for more effective antiviral therapeutic treatment.
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Affiliation(s)
- Serena Massari
- Department of Chemistry and Technology of Drugs, University of Perugia, 06123 Perugia, Italy
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86
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Zhao J, Huang H, Wu W, Chen H, Jiang H. Metal-free synthesis of 2-aminobenzothiazoles via aerobic oxidative cyclization/dehydrogenation of cyclohexanones and thioureas. Org Lett 2013; 15:2604-7. [PMID: 23662734 DOI: 10.1021/ol400773k] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A metal-free process for the synthesis of 2-aminobenzothiazoles from cyclohexanones and thioureas has been developed using catalytic iodine and molecular oxygen as the oxidant under mild conditions. Various 2-aminobenzothiazoles, 2-aminonaphtho[2,1-d]thiazoles, and 2-aminonaphtho[1,2-d]thiazoles were prepared via this method in satisfactory yields.
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Affiliation(s)
- Jinwu Zhao
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China
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87
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Zhu TH, Wang SY, Wang GN, Ji SJ. Cobalt-Catalyzed Oxidative Isocyanide Insertion to Amine-Based Bisnucleophiles: Diverse Synthesis of Substituted 2-Aminobenzimidazoles, 2-Aminobenzothiazoles, and 2-Aminobenzoxazoles. Chemistry 2013; 19:5850-3. [DOI: 10.1002/chem.201300239] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 02/25/2013] [Indexed: 01/14/2023]
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88
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Kumar D, Mishra A, Mishra BB, Bhattacharya S, Tiwari VK. Synthesis of Glycoconjugate Benzothiazoles via Cleavage of Benzotriazole Ring. J Org Chem 2013; 78:899-909. [DOI: 10.1021/jo3021049] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dhananjay Kumar
- Department of Chemistry, Centre of
Advanced Study, Banaras Hindu University, Varanasi-221005, India
| | - Amrita Mishra
- Department of Chemistry, Centre of
Advanced Study, Banaras Hindu University, Varanasi-221005, India
| | - Bhuwan B. Mishra
- Department of Chemistry, Centre of
Advanced Study, Banaras Hindu University, Varanasi-221005, India
| | - Subrato Bhattacharya
- Department of Chemistry, Centre of
Advanced Study, Banaras Hindu University, Varanasi-221005, India
| | - Vinod K. Tiwari
- Department of Chemistry, Centre of
Advanced Study, Banaras Hindu University, Varanasi-221005, India
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89
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Strategies to Block HIV Transcription: Focus on Small Molecule Tat Inhibitors. BIOLOGY 2012; 1:668-97. [PMID: 24832514 PMCID: PMC4009808 DOI: 10.3390/biology1030668] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 11/06/2012] [Accepted: 11/07/2012] [Indexed: 01/29/2023]
Abstract
After entry into the target cell, the human immunodeficiency virus type I (HIV) integrates into the host genome and becomes a proviral eukaryotic transcriptional unit. Transcriptional regulation of provirus gene expression is critical for HIV replication. Basal transcription from the integrated HIV promoter is very low in the absence of the HIV transactivator of transcription (Tat) protein and is solely dependent on cellular transcription factors. The 5' terminal region (+1 to +59) of all HIV mRNAs forms an identical stem-bulge-loop structure called the Transactivation Responsive (TAR) element. Once Tat is made, it binds to TAR and drastically activates transcription from the HIV LTR promoter. Mutations in either the Tat protein or TAR sequence usually affect HIV replication, indicating a strong requirement for their conservation. The necessity of the Tat-mediated transactivation cascade for robust HIV replication renders Tat one of the most desirable targets for transcriptional therapy against HIV replication. Screening based on inhibition of the Tat-TAR interaction has identified a number of potential compounds, but none of them are currently used as therapeutics, partly because these agents are not easily delivered for an efficient therapy, emphasizing the need for small molecule compounds. Here we will give an overview of the different strategies used to inhibit HIV transcription and review the current repertoire of small molecular weight compounds that target HIV transcription.
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90
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Avila B, Roth A, Streets H, Dwyer DS, Kurth MJ. Triazolbenzo[d]thiazoles: efficient synthesis and biological evaluation as neuroprotective agents. Bioorg Med Chem Lett 2012; 22:5976-8. [PMID: 22892117 PMCID: PMC3432163 DOI: 10.1016/j.bmcl.2012.07.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 07/03/2012] [Accepted: 07/06/2012] [Indexed: 12/27/2022]
Abstract
A number of (1H-1,2,3-triazol-1-yl)benzo[d]thiazoles were synthesized utilizing a versatile Cu-catalyzed azide-alkyne click reaction (CuAAC) on tautomeric benzo[4,5]thiazolo[3,2-d]tetrazole (1) and 2-azidobenzo[d]thiazole (2) starting materials. Moreover, one of the resulting products of this investigation, triazolbenzo[d]thiazole 22, was found to possess significant neuroprotective activity in human neuroblastoma (SH-SY5Y) cells.
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Affiliation(s)
- Belem Avila
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
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91
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Bunce RA, Nammalwar B. Ethyl 1,4-Dihydro-4-oxo-1,8-naphthyridine-3-carboxylates by a Tandem SNAr-Addition-Elimination Reaction. J Heterocycl Chem 2012. [DOI: 10.1002/jhet.917] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Richard A. Bunce
- Department of Chemistry; Oklahoma State University; Stillwater Oklahoma 74078-3071
| | - Baskar Nammalwar
- Department of Chemistry; Oklahoma State University; Stillwater Oklahoma 74078-3071
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92
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Ammosova T, Platonov M, Yedavalli VRK, Obukhov Y, Gordeuk VR, Jeang KT, Kovalskyy D, Nekhai S. Small molecules targeted to a non-catalytic "RVxF" binding site of protein phosphatase-1 inhibit HIV-1. PLoS One 2012; 7:e39481. [PMID: 22768081 PMCID: PMC3387161 DOI: 10.1371/journal.pone.0039481] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Accepted: 05/22/2012] [Indexed: 11/18/2022] Open
Abstract
HIV-1 Tat protein recruits host cell factors including CDK9/cyclin T1 to HIV-1 TAR RNA and thereby induces HIV-1 transcription. An interaction with host Ser/Thr protein phosphatase-1 (PP1) is critical for this function of Tat. PP1 binds to a Tat sequence, Q35VCF38, which resembles the PP1-binding “RVxF” motif present on PP1-binding regulatory subunits. We showed that expression of PP1 binding peptide, a central domain of Nuclear Inhibitor of PP1, disrupted the interaction of HIV-1 Tat with PP1 and inhibited HIV-1 transcription and replication. Here, we report small molecule compounds that target the “RVxF”-binding cavity of PP1 to disrupt the interaction of PP1 with Tat and inhibit HIV-1 replication. Using the crystal structure of PP1, we virtually screened 300,000 compounds and identified 262 small molecules that were predicted to bind the “RVxF”-accommodating cavity of PP1. These compounds were then assayed for inhibition of HIV-1 transcription in CEM T cells. One of the compounds, 1H4, inhibited HIV-1 transcription and replication at non-cytotoxic concentrations. 1H4 prevented PP1-mediated dephosphorylation of a substrate peptide containing an RVxF sequence in vitro. 1H4 also disrupted the association of PP1 with Tat in cultured cells without having an effect on the interaction of PP1 with the cellular regulators, NIPP1 and PNUTS, or on the cellular proteome. Finally, 1H4 prevented the translocation of PP1 to the nucleus. Taken together, our study shows that HIV- inhibition can be achieved through using small molecules to target a non-catalytic site of PP1. This proof-of-principle study can serve as a starting point for the development of novel antiviral drugs that target the interface of HIV-1 viral proteins with their host partners.
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Affiliation(s)
- Tatiana Ammosova
- Center for Sickle Cell Disease, Howard University, Washington, D.C., United States of America
- RCMI Proteomics Core Facility, Howard University, Washington, D.C., United States of America
- Department of Medicine, Howard University, Washington, D.C., United States of America
| | - Maxim Platonov
- ChemBio Center, National Taras Shevchenko University, Kiev, Ukraine
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kiev, Ukraine
| | - Venkat R. K. Yedavalli
- Molecular Virology Section, Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Yuri Obukhov
- RCMI Proteomics Core Facility, Howard University, Washington, D.C., United States of America
| | - Victor R. Gordeuk
- Center for Sickle Cell Disease, Howard University, Washington, D.C., United States of America
- Sickle Cell Center, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Kuan-Teh Jeang
- Molecular Virology Section, Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Dmytro Kovalskyy
- ChemBio Center, National Taras Shevchenko University, Kiev, Ukraine
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kiev, Ukraine
| | - Sergei Nekhai
- Center for Sickle Cell Disease, Howard University, Washington, D.C., United States of America
- RCMI Proteomics Core Facility, Howard University, Washington, D.C., United States of America
- Department of Medicine, Howard University, Washington, D.C., United States of America
- * E-mail:
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93
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Synthesis of 2-N-substituted benzothiazoles via domino condensation-hetero cyclization process, mediated by copper oxide nanoparticles under ligand-free conditions. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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94
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Victoriano AFB, Okamoto T. Transcriptional control of HIV replication by multiple modulators and their implication for a novel antiviral therapy. AIDS Res Hum Retroviruses 2012; 28:125-38. [PMID: 22077140 DOI: 10.1089/aid.2011.0263] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Transcriptional regulation is critical for the human immunodeficiency virus 1 (HIV-1) life cycle and is the only step at which the virus amplifies the content of its genetic information. Numerous known and still unknown transcriptional factors, both host and viral, regulate HIV-1 gene expression and latency. This article is a comprehensive review of transcription factors involved in HIV-1 gene expression and presents the significant implications of nuclear factor kappa B (NF-κB) and the HIV-1 transactivator of transcription (Tat) protein. We include recent findings on chromatin remodeling toward HIV transcription and its therapeutic implication is also discussed. The current status of small-molecular-weight compounds that affect HIV transcription is also described.
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Affiliation(s)
- Ann Florence B. Victoriano
- Department of Molecular and Cellular Biology, Nagoya City University Graduate School for Medical Sciences, Nagoya, Japan
- Japanese Foundation for AIDS Prevention, Tokyo, Japan
| | - Takashi Okamoto
- Department of Molecular and Cellular Biology, Nagoya City University Graduate School for Medical Sciences, Nagoya, Japan
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95
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Sashida H, Kaname M. Rapid One-Pot Versatile Preparation of 2-Aminobenzothiazoles by Highly Efficient Copper(I)-Catalyzed Inorganic Base-Free Intramolecular Cyclization. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)43] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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96
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Wang H, Wang L, Shang J, Li X, Wang H, Gui J, Lei A. Fe-catalysed oxidative C–H functionalization/C–S bond formation. Chem Commun (Camb) 2012; 48:76-8. [DOI: 10.1039/c1cc16184a] [Citation(s) in RCA: 188] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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97
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Synthesis and chromatographic enantioresolution of anti-HIV quinolone derivatives. Talanta 2011; 85:1392-7. [DOI: 10.1016/j.talanta.2011.06.047] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 05/30/2011] [Accepted: 06/11/2011] [Indexed: 11/23/2022]
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98
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Mugnaini C, Falciani C, De Rosa M, Brizzi A, Pasquini S, Corelli F. Regioselective functionalization of quinolin-4(1H)-ones via sequential palladium-catalyzed reactions. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.134] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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99
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Bielenica A, Kossakowski J, Struga M, Dybała I, Loddo R, Ibba C, La Colla P. Synthesis and Biological Evaluation of New 3-Phenyl-1-[(4-arylpiperazin-1-yl)alkyl]-piperidine-2,6-diones. Sci Pharm 2011; 79:225-38. [PMID: 21773062 PMCID: PMC3134852 DOI: 10.3797/scipharm.1012-17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 02/10/2011] [Indexed: 12/01/2022] Open
Abstract
A set of 13 alkyl derivatives of 3-phenylpiperidine-2,6-dione were synthesized. Newly obtained compounds were investigated in vitro against HIV-1 and other selected viruses. The benzyl 3f and fluorophenyl 3g derivatives showed moderate protection against CVB-2 and the compound 3g also against HSV-1. Derivatives were tested also for their antibacterial and antifungal activity. The molecular structures of 3a and 3d were determined by an X-ray analysis.
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Affiliation(s)
- Anna Bielenica
- Department of Medical Chemistry, First Faculty of Medicine, The Medical University of Warsaw, 3 Oczki Street, 02-007 Warsaw, Poland
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Abstract
The current anti-HIV treatments fail to completely eradicate the virus in HIV-infected individuals, mainly as a result of a small pool of latently infected cells. This issue, together with the emergence of multidrug-resistant viruses, clearly highlights the need to find additional strategies. An overview of the Tat-mediated transcription inhibitors 6-desfluoroquinolones (6-DFQs), identified by our group, is given in this review along with a critical appraisal of their advantages and drawbacks. Attempts are also made to place them within the context of new potential anti-HIV therapeutics. Due to their innovative mechanism of action, the 6-DFQs could be interesting candidates for use in association with the currently used cocktail of drugs. Their potential as antivirals deserves further investigation.
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