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Souza WA, Demarqui FM, de Almeida AM, Silva RTC, Alves DA, Araújo TG, Resende JALC, Pavan FR, Santos HFD, de Almeida MV, Guerra W. Synthesis and in vitro evaluation of antimycobacterial activity of two palladium(II) complexes based on 5-alkyl-1,3,4-oxadiazol-2(3H)-thione derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Faria RX, de Jesus Hiller N, Salles JP, Resende JALC, Diogo RT, von Ranke NL, Bello ML, Rodrigues CR, Castro HC, de Luna Martins D. Arylboronic acids inhibit P2X7 receptor function and the acute inflammatory response. J Bioenerg Biomembr 2019; 51:277-290. [PMID: 31256283 DOI: 10.1007/s10863-019-09802-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 05/26/2019] [Indexed: 02/08/2023]
Abstract
The P2X7 receptor (P2X7R) is an ion channel which is activated by interactions with the extracellular ATP molecules. The molecular complex P2X7R/ATP induces conformational changes in the protein subunits, opening a pore in the ion channel macromolecular structure. Currently, the P2X7R has been studied as a potential therapeutic target of anti-inflammatory drugs. Based on this, a series of eight boronic acids (NO) analogs were evaluated on the biologic effect of this pharmacophoric group on the human and murine P2X7R. The boronic acids derivatives NO-01 and NO-12 inhibited in vitro human and murine P2X7R function. These analogs compounds showed effect better than compound BBG and similar to inhibitor A740003 for inhibiting dye uptake, in vitro IL-1β release and ATP-induced paw edema in vivo. In both, in vitro and in vivo assays the compound NO-01 showed to be the hit compound in the present series of the arylboronic acids analogs. The molecular docking suggests that the NO derivatives bind into the upper body domain of the P2X7 pore and that the main intermolecular interaction with the two most active NO derivatives occur with the residues Phe 95, 103 and 293 by hydrophobic interactions and with Leu97, Gln98 and Ser101 by hydrogen bonds.. These results indicate that the boronic acid derivative NO-01 shows the lead compound characteristics to be used as a scaffold structure to the development of new P2X7R inhibitors with anti-inflammatory action.
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Affiliation(s)
- Robson Xavier Faria
- Laboratory of Toxoplasmosis and Other Protozoans, Instituto Oswaldo Cruz, Avenida Brasil, 4365, Pavilion 108, room 32, CEP, Rio de Janeiro, Fiocruz, 21045-900, Brazil. .,Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil.
| | - Noemi de Jesus Hiller
- Research Group on Catalysis and Synthesis, Laboratory 413, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Juliana Pimenta Salles
- Laboratory of Toxoplasmosis and Other Protozoans, Instituto Oswaldo Cruz, Avenida Brasil, 4365, Pavilion 108, room 32, CEP, Rio de Janeiro, Fiocruz, 21045-900, Brazil
| | | | - Roberta Tosta Diogo
- Laboratory of Toxoplasmosis and Other Protozoans, Instituto Oswaldo Cruz, Avenida Brasil, 4365, Pavilion 108, room 32, CEP, Rio de Janeiro, Fiocruz, 21045-900, Brazil.,Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Natalia Lidmar von Ranke
- Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil.,Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Murilo Lamim Bello
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Carlos Rangel Rodrigues
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Helena Carla Castro
- Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Daniela de Luna Martins
- Research Group on Catalysis and Synthesis, Laboratory 413, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
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Pardo-Vargas A, de Barcelos Oliveira I, Stephens PRS, Cirne-Santos CC, de Palmer Paixão ICN, Ramos FA, Jiménez C, Rodríguez J, Resende JALC, Teixeira VL, Castellanos L. Dolabelladienols A-C, new diterpenes isolated from Brazilian brown alga Dictyota pfaffii. Mar Drugs 2014; 12:4247-59. [PMID: 25056631 PMCID: PMC4113826 DOI: 10.3390/md12074247] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/27/2014] [Accepted: 06/30/2014] [Indexed: 11/16/2022] Open
Abstract
The marine brown alga Dictyota pfaffii from Atol das Rocas, in Northeast Brazil is a rich source of dolabellane diterpene, which has the potential to be used in future antiviral drugs by inhibiting reverse transcriptase (RT) of HIV-1. Reexamination of the minor diterpene constituents yielded three new dolabellane diterpenes, (1R*,2E,4R*,7S,10S*,11S*,12R*)10,18-diacetoxy-7-hydroxy-2,8(17)-dolabelladiene (1), (1R*,2E,4R*,7R*,10S*,11S*,12R*)10,18-diacetoxy-7-hydroxy-2,8(17)-dolabelladiene (2), (1R*,2E,4R*,8E,10S*,11S,12R*)10,18-diacetoxy-7-hydroxy-2,8-dolabelladiene (3), termed dolabelladienols A-C (1-3) respectively, in addition to the known dolabellane diterpenes (4-6). The elucidation of the compounds 1-3 was assigned by 1D and 2D NMR, MS, optical rotation and molecular modeling, along with the relative configuration of compound 4 and the absolute configuration of 5 by X-ray diffraction. The potent anti-HIV-1 activities displayed by compounds 1 and 2 (IC50 = 2.9 and 4.1 μM), which were more active than even the known dolabelladienetriol 4, and the low cytotoxic activity against MT-2 lymphocyte tumor cells indicated that these compounds are promising anti-HIV-1 agents.
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Affiliation(s)
- Alonso Pardo-Vargas
- Departamento de Química, Universidad Nacional de Colombia, Cra. 30 N° 45-03, Bogotá D.C., Colombia.
| | - Ingrid de Barcelos Oliveira
- Laboratório de Imunologia Clínica, Departamento de Imunologia, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, Manguinhos, Pavilhão Leônidas Deane/409, Rio de Janeiro 21045-900, RJ, Brazil.
| | - Paulo Roberto Soares Stephens
- Laboratório de Imunologia Clínica, Departamento de Imunologia, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, Manguinhos, Pavilhão Leônidas Deane/409, Rio de Janeiro 21045-900, RJ, Brazil.
| | - Claudio Cesar Cirne-Santos
- Laboratório de Imunologia Clínica, Departamento de Imunologia, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, Manguinhos, Pavilhão Leônidas Deane/409, Rio de Janeiro 21045-900, RJ, Brazil.
| | - Izabel Christina Nunes de Palmer Paixão
- Laboratório de Virologia Molecular e Biotecnologia Marinha, Programa de Pós-graduação em Ciências e Biotecnologia, Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24020-141, RJ, Brazil.
| | - Freddy Alejandro Ramos
- Departamento de Química, Universidad Nacional de Colombia, Cra. 30 N° 45-03, Bogotá D.C., Colombia.
| | - Carlos Jiménez
- Departamento de Química Fundamental, Facultade de Ciencias and Centro de Investigaciones Científicas Avanzadas (CICA) Universidade da Coruña, 15071 A Coruña, Spain.
| | - Jaime Rodríguez
- Departamento de Química Fundamental, Facultade de Ciencias and Centro de Investigaciones Científicas Avanzadas (CICA) Universidade da Coruña, 15071 A Coruña, Spain.
| | | | - Valeria Laneuville Teixeira
- Laboratório Algamar, Departmento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24020-141, RJ, Brazil.
| | - Leonardo Castellanos
- Departamento de Química, Universidad Nacional de Colombia, Cra. 30 N° 45-03, Bogotá D.C., Colombia.
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Allão RA, Jordão AK, Resende JALC, Cunha AC, Ferreira VF, Novak MA, Sangregorio C, Sorace L, Vaz MGF. Determination of the relevant magnetic interactions in low-dimensional molecular materials: the fundamental role of single crystal high frequency EPR. Dalton Trans 2011; 40:10843-50. [PMID: 21860868 DOI: 10.1039/c1dt10780a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new one-dimensional copper(II) complex with formula [Cu(hfac)(2)(N(3)TEMPO)](n) (hfac = hexafluoroacetylacetonate and N(3)TEMPO = 4-azido-2,2,6,6-tetramethylpiperidine-1-oxyl) has been synthesized and investigated by X-ray crystallography, magnetometry and multifrequency single crystal EPR. The system crystallizes in the P1 space group with two non equivalent copper(II) ions in the unit cell, the two nitroxide radicals being coordinated to Cu(1) in axial positions. The copper(II) ions are bridged by N(3)TEMPO radicals resulting in a zig-zag chain structure. The magnetic susceptibility data were at first satisfactorily modeled assuming an alternating spin chain along the monodimensional covalent skeleton, with a ferromagnetic interaction between Cu(1) and the nitroxide moieties and a weaker antiferromagnetic interaction between these and Cu(2) (J(1) = -13.8 cm(-1), J(2) = +2.4 cm(-1)). However, single crystal EPR studies performed at the X- and W-band clearly demonstrate that the observed magnetic monodimensional character of the complex is actually due to the intermolecular contacts involving N(3)TEMPO ligands. This prompted us to fit the magnetic data using a consistent model, pointing out the fundamental role of single crystal EPR data in defining a correct model to describe the magnetic properties of molecular low dimensional systems.
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Affiliation(s)
- R A Allão
- Instituto de Química, Universidade Federal Fluminense, 24020-141, Niterói, RJ, Brazil
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