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Margariti A, Papakonstantinou VD, Stamatakis GM, Demopoulos CA, Machalia C, Emmanouilidou E, Schnakenburg G, Nika MC, Thomaidis NS, Philippopoulos AI. First-Row Transition Metal Complexes Incorporating the 2-(2'-pyridyl)quinoxaline Ligand (pqx), as Potent Inflammatory Mediators: Cytotoxic Properties and Biological Activities against the Platelet-Activating Factor (PAF) and Thrombin. Molecules 2023; 28:6899. [PMID: 37836742 PMCID: PMC10574351 DOI: 10.3390/molecules28196899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/26/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
Inflammatory mediators constitute a recently coined term in the field of metal-based complexes with antiplatelet activities. Our strategy targets Platelet-Activating Factor (PAF) and its receptor, which is the most potent lipid mediator of inflammation. Thus, the antiplatelet (anti-PAF) potency of any substance could be exerted by inhibiting the PAF-induced aggregation in washed rabbit platelets (WRPs), which internationally is a well-accepted methodology. Herein, a series of mononuclear (mer-[Cr(pqx)Cl3(H2O]) (1), [Co(pqx)Cl2(DMF)] (2) (DMF = N,N'-dimethyl formamide), [Cu(pqx)Cl2(DMSO)] (3) (DMSO = dimethyl sulfoxide), [Zn(pqx)Cl2] (4)) and dinuclear complexes ([Mn(pqx)(H2O)2Cl2]2 (5), [Fe(pqx)Cl2]2 (6) and [Ni(pqx)Cl2]2 (7)) incorporating the 2-(2'-pyridyl)quinoxaline ligand (pqx), were biologically evaluated as inhibitors of the PAF- and thrombin-induced aggregation in washed rabbit platelets (WRPs). The molecular structure of the five-co-ordinate analog (3) has been elucidated by single-crystal X-ray diffraction revealing a trigonal bipyramidal geometry. All complexes are potent inhibitors of the PAF-induced aggregation in WRPs in the micromolar range. Complex (6) displayed a remarkable in vitro dual inhibition against PAF and thrombin, with IC50 values of 1.79 μM and 0.46 μM, respectively. Within the series, complex (5) was less effective (IC50 = 39 μM) while complex (1) was almost 12-fold more potent against PAF, as opposed to thrombin-induced aggregation. The biological behavior of complexes 1, 6 and 7 on PAF's basic metabolic enzymatic pathways reveals that they affect key biosynthetic and catabolic enzymes of PAF underlying the anti-inflammatory properties of the relevant complexes. The in vitro cytotoxic activities of all complexes in HEK293T (human embryonic kidney cells) and HeLa cells (cervical cancer cells) are described via the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay. The results reveal that complex 3 is the most potent within the series.
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Affiliation(s)
- Antigoni Margariti
- Laboratory of Inorganic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece;
| | - Vasiliki D. Papakonstantinou
- Laboratory of Biochemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (V.D.P.); (G.M.S.); (C.A.D.); (C.M.); (E.E.)
| | - George M. Stamatakis
- Laboratory of Biochemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (V.D.P.); (G.M.S.); (C.A.D.); (C.M.); (E.E.)
| | - Constantinos A. Demopoulos
- Laboratory of Biochemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (V.D.P.); (G.M.S.); (C.A.D.); (C.M.); (E.E.)
| | - Christina Machalia
- Laboratory of Biochemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (V.D.P.); (G.M.S.); (C.A.D.); (C.M.); (E.E.)
| | - Evangelia Emmanouilidou
- Laboratory of Biochemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (V.D.P.); (G.M.S.); (C.A.D.); (C.M.); (E.E.)
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany;
| | - Maria-Christina Nika
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (M.-C.N.); (N.S.T.)
| | - Nikolaos S. Thomaidis
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (M.-C.N.); (N.S.T.)
| | - Athanassios I. Philippopoulos
- Laboratory of Inorganic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece;
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Benitez-Medina GE, Flores R, Vargas L, Cuenú F, Sharma P, Castro M, Ramírez A. Hybrid material by anchoring a ruthenium(ii) imine complex to SiO 2: preparation, characterization and DFT studies. RSC Adv 2021; 11:6221-6233. [PMID: 35423152 PMCID: PMC8694867 DOI: 10.1039/d0ra09282g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 01/23/2021] [Indexed: 11/21/2022] Open
Abstract
Ruthenium-silica hybrid material (RuCl2(PR3)2-2-PyCH-AMPTSi/SiO2) was prepared and characterized by various spectroscopic techniques. A deconvolution procedure was applied to the spectroscopic data to deconstruct the overlapped bands. A density functional theoretical approach was applied to get insights into the electronic structure of the ruthenium coordination site and the functional RI-PBE-D3/Def2TZVP basis set was used for the optimization. Relativistic effects were considered using the zero-order regular approximation (ZORA). The anchoring process, evinced for each step of the synthesis of the hybrid material, was tracked by FT-IR analyses. The transitions observed in the FT-IR spectra were verified by DFT analyses, which agree with the experimental data. In the DRS-UV-Vis spectra, three main bands were detected by the deconvolution procedure that correspond to the charge transfer transitions, with the main contributions from ruthenium-chlorine and imine-pyridine fragments. TD-DFT results reveal that ruthenium-chlorine antibonding orbitals act as main charge donors, while pyridine-imine is the main charge acceptor.
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Affiliation(s)
- G Eliad Benitez-Medina
- Grupo de Investigación Catálisis, Universidad del Cauca Calle 5 No. 4-70 Popayán Colombia
| | - Raúl Flores
- Departamento de Física y Química Teórica, DEPg, Facultad de Química, Universidad Nacional Autónoma de México C.P. 04510 Ciudad de México México
| | - Luis Vargas
- Grupo de Investigación Catálisis, Universidad del Cauca Calle 5 No. 4-70 Popayán Colombia
| | - Fernando Cuenú
- Grupo Química de Compuestos Organometálicos y Catálisis, Universidad del Quindío Armenia Colombia
| | - Pankaj Sharma
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria Circuito Exterior, Coyoacán 04510 Ciudad de México México
| | - Miguel Castro
- Departamento de Física y Química Teórica, DEPg, Facultad de Química, Universidad Nacional Autónoma de México C.P. 04510 Ciudad de México México
| | - Alfonso Ramírez
- Grupo de Investigación Catálisis, Universidad del Cauca Calle 5 No. 4-70 Popayán Colombia
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Zacharopoulos N, Kolovou E, Peppas A, Koukoulakis K, Bakeas E, Schnakenburg G, Philippopoulos AI. Pyridyl based ruthenium(II) catalyst precursors and their dihydride analogues as the catalytically active species for the transfer hydrogenation of ketones. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.07.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Facile synthesis of a 2-(2′-pyridyl)-4-(methylcarboxy)quinoline ruthenium (II) based catalyst precursor for transfer hydrogenation of aromatic ketones. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.04.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Cheng F, Yu S, Ren M, He C, Yin H. Di- and trinuclear Ru(II) complexes of 1,10-phenanthroline and 2,2′-bipyridine derivatives; synthesis, photophysical and electrochemical properties. TRANSIT METAL CHEM 2016. [DOI: 10.1007/s11243-016-0022-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Zacharopoulos N, Koukoulakis K, Bakeas E, Philippopoulos AI. A 2-(2’-pyridyl)quinoline ruthenium(II) complex as an active catalyst for the transfer hydrogenation of ketones. OPEN CHEM 2016. [DOI: 10.1515/chem-2016-0034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThe ruthenium(II) complex cis-[RuCl2(PPh3)2(L1)] (1) where L1 = 2-(2’-pyridyl)quinoline was obtained in high yield from the reaction of [RuCl2(PPh3)3] with L1. The new compound was characterized by different spectroscopic methods including FT-IR, UV-Vis, NMR (1H, 31P) spectroscopy along with a mass spectrometric analysis (ESI-MS) and conductivity measurements. 31P NMR spectroscopy provided evidence that the two PPh3 ligands are orientated trans to each other in an octahedral environment. Complex (1) was tested in the transfer hydrogenation of various ketones in 2-propanol at 82 oC. The catalytic activity of (1) displayed quantitative conversions for benzophenone and 4-chloroacetophenone.
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Affiliation(s)
- Nikolaos Zacharopoulos
- 1Laboratory of Inorganic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou 15771, Athens, Greece
| | - Konstantinos Koukoulakis
- 2Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou 15771, Athens, Greece
| | - Evangelos Bakeas
- 2Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou 15771, Athens, Greece
| | - Athanassios I. Philippopoulos
- 1Laboratory of Inorganic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou 15771, Athens, Greece
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Cheng F, He C, Yao L, Wang F, Tang N. Three trinuclear Ru(II) complexes containing 4,5-diazafluorene and 2,2′-bipyridine: synthesis, absorption spectrum, luminescence, and redox behavior. J COORD CHEM 2015. [DOI: 10.1080/00958972.2014.994512] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Feixiang Cheng
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Chixian He
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Lifeng Yao
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Fan Wang
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, PR China
| | - Ning Tang
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, PR China
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Electrocatalytic Activity of Nitrogen-Doped Carbon Nanotubes Decorated with Gold Nanoparticles. Electrocatalysis (N Y) 2013. [DOI: 10.1007/s12678-013-0175-9] [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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9
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Tsierkezos NG, Haj Othman S, Ritter U. Nitrogen-doped carbon nanotubes modified with gold nanoparticles for simultaneous analysis of N-acetylcysteine and acetaminophen. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2298-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tsierkezos NG, Ritter U. Electrochemical Responses and Sensitivities of Films Based on Multi-Walled Carbon Nanotubes in Aqueous Solutions. J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9925-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Tsierkezos NG, Ritter U, Wetzold N, Hübler AC. Non-enzymatic analysis of glucose on printed films based on multi-walled carbon nanotubes. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0881-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Shukla SN, Gaur P, Dubey A, Mathews S, Mehrotra R. Studies on reactions of some ruthenium sulfoxide bipyridyl complexes with 1,4-bis(salicylidene)phenylenediamine ligand used as spacer. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.657630] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Satyendra N. Shukla
- a Coordination Chemistry Research Lab, Department of Chemistry , Govt. Model Science College , Jabalpur 482 001 , Madhya Pradesh , India
| | - Pratiksha Gaur
- a Coordination Chemistry Research Lab, Department of Chemistry , Govt. Model Science College , Jabalpur 482 001 , Madhya Pradesh , India
| | - Archana Dubey
- a Coordination Chemistry Research Lab, Department of Chemistry , Govt. Model Science College , Jabalpur 482 001 , Madhya Pradesh , India
| | - Sheela Mathews
- a Coordination Chemistry Research Lab, Department of Chemistry , Govt. Model Science College , Jabalpur 482 001 , Madhya Pradesh , India
| | - Ripul Mehrotra
- a Coordination Chemistry Research Lab, Department of Chemistry , Govt. Model Science College , Jabalpur 482 001 , Madhya Pradesh , India
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Tsierkezos NG, Ritter U. Oxidation of dopamine on multi-walled carbon nanotubes. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1647-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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14
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Mehrotra R, Shukla SN, Gaur P. Spectroscopic characterization of Schiff base coordinating monomolecular trinuclear complexes prepared through tailored synthesis. J COORD CHEM 2012. [DOI: 10.1080/00958972.2011.645814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Ripul Mehrotra
- a Department of Engineering Chemistry , ITM University , Gwalior , MP , India
| | - Satyendra N. Shukla
- b Coordination Chemistry Research Lab, Department of Chemistry , Government Model Science College , Jabalpur , MP 482001 , India
| | - Pratiksha Gaur
- b Coordination Chemistry Research Lab, Department of Chemistry , Government Model Science College , Jabalpur , MP 482001 , India
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Cheng F, Chen J, Wang F, Tang N, Chen L. Synthesis, photophysical, and electrochemical properties of a new family of trinuclear Ru(II) polypyridine complexes. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.646998] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Feixiang Cheng
- a College of Chemistry and Chemical Engineering, Qujing Normal University , Qujing 655011 , P.R. China
| | - Jishu Chen
- a College of Chemistry and Chemical Engineering, Qujing Normal University , Qujing 655011 , P.R. China
| | - Fan Wang
- a College of Chemistry and Chemical Engineering, Qujing Normal University , Qujing 655011 , P.R. China
| | - Ning Tang
- b College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000 , P.R. China
| | - Longhai Chen
- b College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000 , P.R. China
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