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Dumitrescu A, Maxim C, Badea M, Rostas AM, Ciorîță A, Tirsoaga A, Olar R. Decavanadate-Bearing Guanidine Derivatives Developed as Antimicrobial and Antitumor Species. Int J Mol Sci 2023; 24:17137. [PMID: 38138964 PMCID: PMC10742724 DOI: 10.3390/ijms242417137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/29/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023] Open
Abstract
To obtain biologically active species, a series of decavanadates (Hpbg)4[H2V10O28]·6H2O (1) (Htbg)4[H2V10O28]·6H2O; (2) (Hgnd)2(Hgnu)4[V10O28]; (3) (Hgnu)6[V10O28]·2H2O; and (4) (pbg = 1-phenyl biguanide, tbg = 1-(o-tolyl)biguanide, gnd = guanidine, and gnu = guanylurea) were synthesized and characterized by several spectroscopic techniques (IR, UV-Vis, and EPR) as well as by single crystal X-ray diffraction. Compound (1) crystallizes in space group P-1 while (3) and (4) adopt the same centrosymmetric space group P21/n. The unusual signal identified by EPR spectroscopy was assigned to a charge-transfer π(O)→d(V) process. Both stability in solution and reactivity towards reactive oxygen species (O2- and OH·) were screened through EPR signal modification. All compounds inhibited the development of Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Enterococcus faecalis bacterial strains in a planktonic state at a micromolar level, the most active being compound (3). However, the experiments conducted at a minimal inhibitory concentration (MIC) indicated that the compounds do not disrupt the biofilm produced by these bacterial strains. The cytotoxicity assayed against A375 human melanoma cells and BJ human fibroblasts by testing the viability, lactate dehydrogenase, and nitric oxide levels indicated compound (1) as the most active in tumor cells.
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Affiliation(s)
- Andreea Dumitrescu
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania; (A.D.); (C.M.); (M.B.)
| | - Catalin Maxim
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania; (A.D.); (C.M.); (M.B.)
| | - Mihaela Badea
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania; (A.D.); (C.M.); (M.B.)
| | - Arpad Mihai Rostas
- Department of Physics of Nanostructured Systems, National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Str., 400293 Cluj-Napoca, Romania;
| | - Alexandra Ciorîță
- Department of Molecular Biology and Biotechnology, Faculty of Biology and Geology, Babeș-Bolyai University, 5-7 Clinicilor St., 400001 Cluj-Napoca, Romania
| | - Alina Tirsoaga
- Department of Analytical and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Av., District 3, 030018 Bucharest, Romania;
| | - Rodica Olar
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania; (A.D.); (C.M.); (M.B.)
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Tirsoaga A, Cojocaru V, Badea M, Badea IA, Rostas AM, Stoica R, Bacalum M, Chifiriuc MC, Olar R. Copper (II) Species with Improved Anti-Melanoma and Antibacterial Activity by Inclusion in β-Cyclodextrin. Int J Mol Sci 2023; 24:ijms24032688. [PMID: 36769008 PMCID: PMC9916925 DOI: 10.3390/ijms24032688] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/25/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
To improve their biological activity, complexes [Cu(bipy)(dmtp)2(OH2)](ClO4)2·dmtp (1) and [Cu(phen)(dmtp)2(OH2)](ClO4)2·dmtp (2) (bipy 2,2'-bipyridine, phen: 1,10-phenantroline, and dmtp: 5,7-dimethyl-1,2,4-triazolo [1,5-a]pyrimidine) were included in β-cyclodextrins (β-CD). During the inclusion, the co-crystalized dmtp molecule was lost, and UV-Vis spectra together with the docking studies indicated the synthesis of new materials with 1:1 and 1:2 molar ratios between complexes and β-CD. The association between Cu(II) compounds and β-CD has been proven by the identification of the components' patterns in the IR spectra and powder XRD diffractograms, while solid-state UV-Vis and EPR spectra analysis highlighted a slight modification of the square-pyramidal stereochemistry around Cu(II) in comparison with precursors. The inclusion species are stable in solution and exhibit the ability to scavenge or trap ROS species (O2·- and HO·) as indicated by the EPR experiments. Moreover, the two inclusion species exhibit anti-proliferative activity against murine melanoma B16 cells, which has been more significant for (2)@β-CD in comparison with (2). This behavior is associated with a cell cycle arrest in the G0/G1 phase. Compared with precursors, (1a)@β-CD and (2a)@β-CD exhibit 17 and 26 times more intense activity against planktonic Escherichia coli, respectively, while (2a)@β-CD is 3 times more active against the Staphylococcus aureus strain.
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Affiliation(s)
- Alina Tirsoaga
- Department of Analytical and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Av., District 3, 030018 Bucharest, Romania
| | - Victor Cojocaru
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania
| | - Mihaela Badea
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania
| | - Irinel Adriana Badea
- Department of Analytical and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Av., District 3, 030018 Bucharest, Romania
- Correspondence: (I.A.B.); (R.O.)
| | - Arpad Mihai Rostas
- National Institute for Research and Development of Isotopic and Molecular Technologies, Department of Physics of Nanostructured Systems, 67-103 Donat Str., 400293 Cluj-Napoca, Romania
| | - Roberta Stoica
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
| | - Mihaela Bacalum
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., District 5, 060101 Bucharest, Romania
- Romanian Academy of Scientists, 54 Spl. Independenței Str., District 5, 050085 Bucharest, Romania
- Biological Sciences Division, The Romanian Academy, 25 Calea Victoriei, Sector 1, District 1, 010071 Bucharest, Romania
| | - Rodica Olar
- Department of Analytical and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Av., District 3, 030018 Bucharest, Romania
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania
- Correspondence: (I.A.B.); (R.O.)
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Olar R, Maxim C, Badea M, Bacalum M, Raileanu M, Avram S, Korošin NČ, Burlanescu T, Rostas AM. Antiproliferative Copper(II) Complexes Bearing Mixed Chelating Ligands: Structural Characterization, ROS Scavenging, In Silico Studies, and Anti-Melanoma Activity. Pharmaceutics 2022; 14:pharmaceutics14081692. [PMID: 36015318 PMCID: PMC9416163 DOI: 10.3390/pharmaceutics14081692] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/29/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022] Open
Abstract
Melanoma is a skin cancer characterized by rapid growth and spread for which current therapies produce both resistance and increased risk of infection. To develop new anti-melanoma biocompatible species, the series of complexes Cu(N-N)(bzac)(X)⋅nH2O (N-N: 1,10-phenanthroline/2,2′-bipyridine, Hbzac: 1-phenyl-1,3-butanedione, X: NO3/ClO4, and n = 0, 1) was studied. Single-crystal X-ray diffraction revealed a mononuclear structure for all complexes. The ability of the complexes to scavenge or trap reactive oxygen species such as O2⋅− and HO⋅ was proved by EPR spectroscopy experiments. All complexes inhibited B16 murine melanoma cells in a dose-dependent and nanomolar range, but the complexes with 1,10-phenanthroline were more active. Moreover, comparative activity on B16 and healthy BJ cells revealed a therapeutic index of 1.27–2.24. Bioinformatic methods were used to calculate the drug-likeness, pharmacokinetic, pharmacogenomic, and pharmacodynamic profiles of the compounds. The results showed that all compounds exhibit drug-likeness features, as well as promising absorption, distribution, metabolism, and excretion (ADME) properties, and no toxicity. The pharmacodynamics results showed that the neutral species appear to be good candidates for antitumor molecular targets (Tyrosyl-DNA phosphodiesterase 1, DNA-(apurinic or apyrimidinic site) lyase or Kruppel-like factor 5). Furthermore, the pharmacogenomic results showed a good affinity of the copper(II) complexes for the human cytochrome. These results recommend complexes bearing 1,10-phenanthroline as good candidates for developing drugs to melanoma alternative treatment.
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Affiliation(s)
- Rodica Olar
- Faculty of Chemistry, Department of Inorganic Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania
- Correspondence: (R.O.); (S.A.)
| | - Catalin Maxim
- Faculty of Chemistry, Department of Inorganic Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania
| | - Mihaela Badea
- Faculty of Chemistry, Department of Inorganic Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania
| | - Mihaela Bacalum
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
| | - Mina Raileanu
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
- Faculty of Physics, Department of Electricity, Solid State and Biophysics, University of Bucharest, 405A Atomiștilor Str., 077125 Magurele-Ilfov, Romania
| | - Speranta Avram
- Faculty of Biology, Department of Anatomy, Animal Physiology and Biophysics, University of Bucharest, 91-95, Splaiul Independenței, 050095 Bucharest, Romania
- Correspondence: (R.O.); (S.A.)
| | - Nataša Čelan Korošin
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Teodora Burlanescu
- Laboratory of Optical Processes in Nanostructure Materials, National Institute of Materials Physics, 405A Atomiștilor Str., 077125 Magurele-Ilfov, Romania
| | - Arpad Mihai Rostas
- Laboratory of Atomic Structures and Defects in Advanced Materials, LASDAM, National Institute of Materials Physics, 405A Atomiștilor Str., 077125 Magurele-Ilfov, Romania
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Maxim C, Badea M, Rostas AM, Chifiriuc MC, Pircalabioru GG, Avram S, Olar R. Featured Cover. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6584] [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: 11/10/2022]
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Ruta LL, Farcasanu IC, Bacalum M, Răileanu M, Rostas AM, Daniliuc C, Chifiriuc MC, Măruțescu L, Popa M, Badea M, Iorgulescu EE, Olar R. Biological Activity of Triazolopyrimidine Copper(II) Complexes Modulated by an Auxiliary N-N-Chelating Heterocycle Ligands. Molecules 2021; 26:6772. [PMID: 34833864 PMCID: PMC8620715 DOI: 10.3390/molecules26226772] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 09/29/2021] [Revised: 10/20/2021] [Accepted: 11/05/2021] [Indexed: 01/31/2023] Open
Abstract
Novel complexes of type [Cu(N-N)(dmtp)2(OH2)](ClO4)2·dmtp ((1) N-N: 2,2'-bipyridine; (2) L: 1,10-phenantroline and dmtp: 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine) were designed in order to obtain biologically active compounds. Complexes were characterized as mononuclear species that crystallized in the space group P-1 of the triclinic system with a square pyramidal geometry around the copper (II). In addition to the antiproliferative effect on murine melanoma B16 cells, complex (1) exhibited low toxicity on normal BJ cells and did not affect membrane integrity. Complex (2) proved to be a more potent antimicrobial in comparison with (1), but both compounds were more active in comparison with dmtp-both against planktonic cells and biofilms. A stronger antimicrobial and antibiofilm effect was noticed against the Gram-positive strains, including methicillin-resistant Staphylococcus aureus (MRSA). Both electron paramagnetic resonance (EPR) and Saccharomyces cerevisiae studies indicated that the complexes were scavengers rather than reactive oxygen species promoters. Their DNA intercalating capacity was evidenced by modifications in both absorption and fluorescence spectra. Furthermore, both complexes exhibited nuclease-like activity, which increased in the presence of hydrogen peroxide.
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Affiliation(s)
- Lavinia L. Ruta
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Ileana C. Farcasanu
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Măgurele, Romania; (M.B.); (M.R.)
| | - Mina Răileanu
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Măgurele, Romania; (M.B.); (M.R.)
- Department of Electricity, Solid State and Biophysics, Faculty of Physics, University of Bucharest, 405A Atomiştilor Str., 077125 Măgurele, Romania
| | - Arpad Mihai Rostas
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, 405A Atomiştilor Str., 077125 Măgurele, Romania;
| | - Constantin Daniliuc
- Organisch-Chemisches Institute, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany;
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor Str., 060101 Bucharest, Romania; (M.C.C.); (L.M.); (M.P.)
| | - Luminița Măruțescu
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor Str., 060101 Bucharest, Romania; (M.C.C.); (L.M.); (M.P.)
| | - Marcela Popa
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor Str., 060101 Bucharest, Romania; (M.C.C.); (L.M.); (M.P.)
| | - Mihaela Badea
- Department of Inorganic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Emilia Elena Iorgulescu
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Rodica Olar
- Department of Inorganic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
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Maxim C, Badea M, Rostas AM, Chifiriuc MC, Pircalabioru GG, Avram S, Olar R. Copper(II) species with 1‐(
o
‐tolyl)biguanide: Structural characterization, ROS scavenging, antibacterial activity, biocompatibility and in silico studies. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Catalin Maxim
- Faculty of Chemistry, Department of Inorganic Chemistry University of Bucharest Bucharest Romania
| | - Mihaela Badea
- Faculty of Chemistry, Department of Inorganic Chemistry University of Bucharest Bucharest Romania
| | - Arpad Mihai Rostas
- Laboratory of Atomic Structures and Defects in Advanced Materials, LASDAM National Institute of Materials Physics Măgurele Ilfov Romania
| | - Mariana Carmen Chifiriuc
- Faculty of Biology, Department of Microbiology University of Bucharest Bucharest Romania
- Academy of Romanian Scientists Bucharest Romania
| | | | - Speranța Avram
- Faculty of Biology, Department of Anatomy, Animal Physiology and Biophysics University of Bucharest Bucharest Romania
| | - Rodica Olar
- Faculty of Chemistry, Department of Inorganic Chemistry University of Bucharest Bucharest Romania
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Kuncser AC, Vlaicu ID, Pavel OD, Zavoianu R, Badea M, Radu D, Culita DC, Rostas AM, Olar R. Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts. RSC Adv 2021; 11:27589-27602. [PMID: 35480697 PMCID: PMC9037824 DOI: 10.1039/d1ra04211d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 08/01/2021] [Indexed: 11/21/2022] Open
Abstract
Goethite based nanocomposites with a different composition such as 6FeO(OH)·MnO(OH)·0.5H2O (Mn-composite), xFeO(OH)·M(OH)2·yH2O (Co-composite (M: Co, x = 12, y = 3), Ni-composite (M: Ni, x = 7, y = 2)) and xFeO(OH)·MO·yH2O (Cu-composite (M: Cu, x = 5.5, y = 3), Zn-composite (M: Zn, x = 6, y = 1.5)) have been prepared by a soft chemical synthesis consisting in acetate hydrolysis. The data provided by Fourier transform infrared (FTIR), ultraviolet-visible-near infrared (UV-Vis-NIR), electron paramagnetic resonance (EPR) and Mössbauer spectra account for a slight modification of all composites' physicochemical properties compared to the starting material. Powder X-ray diffraction and transmission electron microscopy (TEM) investigations revealed the secondary phase nature and presence along with that of goethite. The TEM data are also consistent with a nano rod-like morphology with a 5–10 nm width and an average length of 40 nm. The catalytic oxidation of cyclooctene with O2 using isobutyraldehyde as reductant and acetonitrile as a solvent was performed in batch conditions for 5 h at room temperature. The selectivity for the epoxide was higher than 99% for all tested solids. The conversion of cyclooctene decreased from 55% to 4% following the same order of variance as the base/acid sites ratio: Mn-composite > Fe-composite > Co-composite > Ni-composite > Zn-composite > Cu-composite. The 6FeO(OH)·MnO(OH)·0.5H2O (Mn-composite) exhibited the most promising catalytic activity in cyclooctene oxidation, which can be correlated with the redox ability of Mn(iii) combined with the increased base character of this solid. The catalytic activity of this sample decreases by 10% after several successive reaction cycles. Goethite based nanocomposites with different compositions (6FeO(OH)·MnO(OH)·0.5H2O, xFeO(OH)·M(OH)2·yH2O or xFeO(OH)·MO·yH2O where M = Co, Ni, Cu or Zn) have been prepared by a soft chemical synthesis via acetate hydrolysis.![]()
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Affiliation(s)
- Andrei Cristian Kuncser
- National Institute of Materials Physics, Laboratory of Atomic Structures and Defects in Advanced Materials 405A Atomiştilor Str., Măgurele Ilfov 077125 Romania
| | - Ioana Dorina Vlaicu
- National Institute of Materials Physics, Laboratory of Atomic Structures and Defects in Advanced Materials 405A Atomiştilor Str., Măgurele Ilfov 077125 Romania
| | - Octavian Dumitru Pavel
- University of Bucharest, Faculty of Chemistry, Department of Organic Chemistry, Biochemistry and Catalysis 4-12 Regina Elisabeta Av. S3 Bucharest 030018 Romania
| | - Rodica Zavoianu
- University of Bucharest, Faculty of Chemistry, Department of Organic Chemistry, Biochemistry and Catalysis 4-12 Regina Elisabeta Av. S3 Bucharest 030018 Romania
| | - Mihaela Badea
- University of Bucharest, Faculty of Chemistry, Department of Inorganic Chemistry 90-92 Panduri Str. 050663 Bucharest Romania
| | - Dana Radu
- National Institute of Materials Physics, Laboratory of Atomic Structures and Defects in Advanced Materials 405A Atomiştilor Str., Măgurele Ilfov 077125 Romania
| | - Daniela Cristina Culita
- Ilie Murgulescu Institute of Physical Chemistry 202 Splaiul Independentei 060021 Bucharest Romania
| | - Arpad Mihai Rostas
- National Institute of Materials Physics, Laboratory of Atomic Structures and Defects in Advanced Materials 405A Atomiştilor Str., Măgurele Ilfov 077125 Romania
| | - Rodica Olar
- University of Bucharest, Faculty of Chemistry, Department of Inorganic Chemistry 90-92 Panduri Str. 050663 Bucharest Romania
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Badea M, Grecu MN, Chifiriuc MC, Bleotu C, Popa M, Iorgulescu EE, Avram S, Uivarosi V, Munteanu A, Ghica D, Olar R. Insight on Ni(II) and Cu(II) complexes of biguanide derivatives developed as effective antimicrobial and antitumour agents. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6155] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Mihaela Badea
- Faculty of Chemistry, Department of Inorganic Chemistry University of Bucharest Bucharest Romania
| | - Maria Nicoleta Grecu
- Materials Physics Division National Institute for Materials Physics Măgurele Romania
| | - Mariana Carmen Chifiriuc
- Faculty of Biology, Department of Microbiology University of Bucharest Bucharest Romania
- Biology Division Research Institute of the University of Bucharest, ICUB Bucharest Romania
| | - Coralia Bleotu
- Department of Virology Stefan S Nicolau Institute of Virology Bucharest Romania
| | - Marcela Popa
- Faculty of Biology, Department of Microbiology University of Bucharest Bucharest Romania
- Biology Division Research Institute of the University of Bucharest, ICUB Bucharest Romania
| | - Emilia Elena Iorgulescu
- Faculty of Chemistry, Department of Analytical Chemistry University of Bucharest Bucharest Romania
| | - Speranța Avram
- Faculty of Biology, Department of Anatomy, Animal Physiology and Biophysics University of Bucharest Bucharest Romania
| | - Valentina Uivarosi
- Faculty of Pharmacy, Department of General and Inorganic Chemistry Carol Davila University of Medicine and Pharmacy Bucharest Romania
| | - Alexandra‐Cristina Munteanu
- Faculty of Pharmacy, Department of General and Inorganic Chemistry Carol Davila University of Medicine and Pharmacy Bucharest Romania
| | - Daniela Ghica
- Materials Physics Division National Institute for Materials Physics Măgurele Romania
| | - Rodica Olar
- Faculty of Chemistry, Department of Inorganic Chemistry University of Bucharest Bucharest Romania
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Munteanu A, Musat MG, Mihaila M, Badea M, Olar R, Nitulescu GM, Rădulescu FȘ, Brasoveanu LI, Uivarosi V. New heteroleptic lanthanide complexes as multimodal drugs: Cytotoxicity studies, apoptosis, cell cycle analysis, DNA interactions, and protein binding. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexandra‐Cristina Munteanu
- Department of General and Inorganic Chemistry, Faculty of Pharmacy Carol Davila University of Medicine and Pharmacy Bucharest Romania
| | - Mihaela Georgiana Musat
- Department of Biochemistry, Faculty of Pharmacy Carol Davila University of Medicine and Pharmacy Bucharest Romania
| | - Mirela Mihaila
- Center of Immunology Stefan S. Nicolau Institute of Virology Bucharest Romania
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry University of Bucharest Bucharest Romania
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry University of Bucharest Bucharest Romania
| | - George Mihai Nitulescu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy Carol Davila University of Medicine and Pharmacy Bucharest Romania
| | - Flavian Ștefan Rădulescu
- Center for Drug Sciences, Faculty of Pharmacy Carol Davila University of Medicine and Pharmacy Bucharest Romania
| | | | - Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy Carol Davila University of Medicine and Pharmacy Bucharest Romania
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Fudulu A, Olar R, Maxim C, Scăeţeanu GV, Bleotu C, Matei L, Chifiriuc MC, Badea M. New Cobalt (II) Complexes with Imidazole Derivatives: Antimicrobial Efficiency against Planktonic and Adherent Microbes and In Vitro Cytotoxicity Features. Molecules 2020; 26:molecules26010055. [PMID: 33374438 PMCID: PMC7796409 DOI: 10.3390/molecules26010055] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 12/04/2020] [Revised: 12/18/2020] [Accepted: 12/19/2020] [Indexed: 01/28/2023] Open
Abstract
Three novel Co(II) complexes of the type [Co(C4H5O2)2L2] (where C4H5O2 is methacrylate anion; L = C3H4N2 (imidazole; HIm) (1), C4H6N2 (2-methylimidazole; 2-MeIm) (2), C5H8N2 (2-ethylimidazole; 2-EtIm) (3)) have been synthesized and characterized by elemental analysis, IR and UV-Vis spectroscopic techniques, thermal analysis and single crystal X-ray diffraction. X-ray crystallography revealed for complexes (1) and (2) distorted trigonal bipyramid stereochemistry for Co(II), meanwhile for complex (3) evidenced that the unit cell comprises three molecular units with interesting structural features. In each unit, both stereochemistry adopted by metallic ion and coordination modes of carboxylate anions are different. The screening of antimicrobial activity revealed that Candida albicans planktonic cells were the most susceptible, with minimal inhibitory concentration (MIC) values of 7.8 μg/mL for complexes (1) and (2) and 15.6 μg/mL for complex (3). Complexes (1) and (2) proved to be more active than complex (3) against the tested bacterial strains, both in planktonic and biofilm growth state, with MIC and minimal biofilm eradication concentration (MBEC) values ranging from 15.6 to 62.5 μg/mL, the best antibacterial effects being noticed against Staphylococcus aureus and Pseudomonas aeruginosa. Remarkably, the MBEC values obtained for the four tested bacterial strains were either identical or even lower than the MIC ones. The cytotoxicity assay indicated that the tested complexes affected the cellular cycle of HeLa, HCT-8, and MG63 cells, probably by inhibiting the expression of vimentin and transient receptor potential canonical 1 (TRPC1). The obtained biological results recommend these complexes as potential candidates for the development of novel anti-biofilm agents.
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Affiliation(s)
- Alina Fudulu
- Stefan S. Nicolau Institute of Virology, Romanian Academy, 030304 Bucharest, Romania; (A.F.); (C.B.); (L.M.)
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania; (R.O.); (C.M.)
| | - Cătălin Maxim
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania; (R.O.); (C.M.)
| | - Gina Vasile Scăeţeanu
- Department of Soil Sciences, University of Agronomical Sciences and Veterinary Medicine, 59 Mărăști Str., 011464 Bucharest, Romania;
| | - Coralia Bleotu
- Stefan S. Nicolau Institute of Virology, Romanian Academy, 030304 Bucharest, Romania; (A.F.); (C.B.); (L.M.)
| | - Lilia Matei
- Stefan S. Nicolau Institute of Virology, Romanian Academy, 030304 Bucharest, Romania; (A.F.); (C.B.); (L.M.)
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor Str., 60101 Bucharest, Romania;
- Academy of Romanian Scientists, 010071 Bucharest, Romania
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania; (R.O.); (C.M.)
- Correspondence: ; Tel.: +40-072-314-0111
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11
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Badea M, Uivarosi V, Olar R. Improvement in the Pharmacological Profile of Copper Biological Active Complexes by Their Incorporation into Organic or Inorganic Matrix. Molecules 2020; 25:molecules25245830. [PMID: 33321882 PMCID: PMC7763451 DOI: 10.3390/molecules25245830] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/05/2020] [Accepted: 12/07/2020] [Indexed: 12/13/2022]
Abstract
Every year, more Cu(II) complexes are proven to be biologically active species, but very few are developed as drugs or entered in clinical trials. This is due to their poor water solubility and lipophilicity, low stability as well as in vivo inactivation. The possibility to improve their pharmacological and/or oral administration profile by incorporation into inorganic or organic matrix was studied. Most of them are either physically encapsulated or conjugated to the matrix via a moiety able to coordinate Cu(II). As a result, a large variety of species were developed as delivery carriers. The organic carriers include liposomes, synthetic or natural polymers or dendrimers, while the inorganic ones are based on carbon nanotubes, hydrotalcite and silica. Some hybrid organic-inorganic materials based on alginate-carbonate, gold-PEG and magnetic mesoporous silica-Schiff base were also developed for this purpose.
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Affiliation(s)
- Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania;
| | - Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia Str., 020956 Bucharest, Romania
- Correspondence: (V.U.); (R.O.)
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania;
- Correspondence: (V.U.); (R.O.)
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12
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Maciuca AM, Munteanu AC, Mihaila M, Badea M, Olar R, Nitulescu GM, Munteanu CVA, Bostan M, Uivarosi V. Rare-Earth Metal Complexes of the Antibacterial Drug Oxolinic Acid: Synthesis, Characterization, DNA/Protein Binding and Cytotoxicity Studies. Molecules 2020; 25:molecules25225418. [PMID: 33228104 PMCID: PMC7699381 DOI: 10.3390/molecules25225418] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 10/22/2020] [Revised: 11/14/2020] [Accepted: 11/17/2020] [Indexed: 01/04/2023] Open
Abstract
"Drug repositioning" is a current trend which proved useful in the search for new applications for existing, failed, no longer in use or abandoned drugs, particularly when addressing issues such as bacterial or cancer cells resistance to current therapeutic approaches. In this context, six new complexes of the first-generation quinolone oxolinic acid with rare-earth metal cations (Y3+, La3+, Sm3+, Eu3+, Gd3+, Tb3+) have been synthesized and characterized. The experimental data suggest that the quinolone acts as a bidentate ligand, binding to the metal ion via the keto and carboxylate oxygen atoms; these findings are supported by DFT (density functional theory) calculations for the Sm3+ complex. The cytotoxic activity of the complexes, as well as the ligand, has been studied on MDA-MB 231 (human breast adenocarcinoma), LoVo (human colon adenocarcinoma) and HUVEC (normal human umbilical vein endothelial cells) cell lines. UV-Vis spectroscopy and competitive binding studies show that the complexes display binding affinities (Kb) towards double stranded DNA in the range of 9.33 × 104 - 10.72 × 105. Major and minor groove-binding most likely play a significant role in the interactions of the complexes with DNA. Moreover, the complexes bind human serum albumin more avidly than apo-transferrin.
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Affiliation(s)
- Ana-Madalina Maciuca
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia St, 020956 Bucharest, Romania;
| | - Alexandra-Cristina Munteanu
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia St, 020956 Bucharest, Romania;
- Correspondence: (A.-C.M.); (V.U.); Tel.: +4-021-318-0742 (V.U.); Fax: +4-021-318-0750 (V.U.)
| | - Mirela Mihaila
- Center of Immunology, Stefan S. Nicolau Institute of Virology, 285 Mihai Bravu Ave, 030304 Bucharest, Romania; (M.M.); (M.B.)
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str, 050663 Bucharest, Romania; (M.B.); (R.O.)
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str, 050663 Bucharest, Romania; (M.B.); (R.O.)
| | - George Mihai Nitulescu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia Str, 020956 Bucharest, Romania;
| | - Cristian V. A. Munteanu
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian Academy (IBRA), 296 Spl. Independenţei, 060031 Bucharest, Romania;
| | - Marinela Bostan
- Center of Immunology, Stefan S. Nicolau Institute of Virology, 285 Mihai Bravu Ave, 030304 Bucharest, Romania; (M.M.); (M.B.)
| | - Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia St, 020956 Bucharest, Romania;
- Correspondence: (A.-C.M.); (V.U.); Tel.: +4-021-318-0742 (V.U.); Fax: +4-021-318-0750 (V.U.)
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13
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Olar R, Badea M, Maxim C, Grumezescu AM, Bleotu C, Măruţescu L, Chifiriuc MC. Anti-biofilm Fe 3O 4@C 18-[1,3,4]thiadiazolo[3,2- a]pyrimidin-4-ium-2-thiolate Derivative Core-shell Nanocoatings. Materials (Basel) 2020; 13:ma13204640. [PMID: 33080907 PMCID: PMC7603173 DOI: 10.3390/ma13204640] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/07/2020] [Accepted: 10/13/2020] [Indexed: 01/11/2023]
Abstract
The derivatives 5,7-dimethyl[1,3,4]thiadiazolo[3,2-a]pyrimidin-4-ium-2-thiolate (1) and 7-methyl-5-phenyl[1,3,4]thiadiazolo[3,2-a]pyrimidin-4-ium-2-thiolate (2) were fully characterized by single-crystal X-ray diffraction. Their supramolecular structure is built through both π–π stacking and C=S–π interactions for both compounds. The embedment of the tested compounds into Fe3O4@C18 core-shell nanocoatings increased the protection degree against Candida albicans biofilms on the catheter surface, suggesting that these bioactive nanocoatings could be further developed as non-cytotoxic strategies for fighting biofilm-associated fungal infections.
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Affiliation(s)
- Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania; (M.B.); (C.M.)
- Correspondence: (R.O.); (M.C.C.)
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania; (M.B.); (C.M.)
| | - Cătălin Maxim
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania; (M.B.); (C.M.)
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxidic Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1–7 Polizu Street, 011061 Bucharest, Romania;
| | - Coralia Bleotu
- Stefan S Nicolau Institute of Virology, Romanian Academy, 285 Mihai Bravu Ave., 030304 Bucharest, Romania;
| | - Luminiţa Măruţescu
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor St., 60101 Bucharest, Romania;
- Environment and Earth Sciences Department, Research Institute of the University of Bucharest—ICUB, Splaiul Independenţei 91–95, 050095 Bucharest, Romania
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor St., 60101 Bucharest, Romania;
- Environment and Earth Sciences Department, Research Institute of the University of Bucharest—ICUB, Splaiul Independenţei 91–95, 050095 Bucharest, Romania
- Academy of Romanian Scientists, 010071 Bucharest, Romania
- Correspondence: (R.O.); (M.C.C.)
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14
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Nuţă I, Badea M, Chifiriuc MC, Bleotu C, Popa M, Daniliuc C, Olar R. Synthesis, physico‐chemical characterization and bioevaluation of Ni(II), Pd(II), and Pt(II) complexes with 1‐(
o
‐tolyl)biguanide: Antimicrobial and antitumor studies. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ileana Nuţă
- Faculty of ChemistryUniversity of Bucharest 90‐92 Panduri Str. Bucharest 050663 Romania
| | - Mihaela Badea
- Faculty of ChemistryUniversity of Bucharest 90‐92 Panduri Str. Bucharest 050663 Romania
| | - Mariana Carmen Chifiriuc
- Faculty of BiologyUniversity of Bucharest 1‐3 Aleea Portocalelor Str. Bucharest 60101 Romania
- Life, Environment and Earth Sciences Department, Spl. Independentei 91‐95Research Institute of the University of Bucharest Bucharest Romania
| | - Coralia Bleotu
- Stefan S Nicolau Institute of Virology 285 Mihai Bravu Ave Bucharest Romania
| | - Marcela Popa
- Faculty of BiologyUniversity of Bucharest 1‐3 Aleea Portocalelor Str. Bucharest 60101 Romania
| | - Constantin‐Gabriel Daniliuc
- Organisch‐Chemisches InstitutWestfälische Wilhelms‐Universität Münster Corrensstrasse 40 Münster 48149 Germany
| | - Rodica Olar
- Faculty of ChemistryUniversity of Bucharest 90‐92 Panduri Str. Bucharest 050663 Romania
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15
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Vlaicu ID, Olar R, Maxim C, Chifiriuc MC, Bleotu C, Stănică N, Vasile Scăeţeanu G, Dulea C, Avram S, Badea M. Evaluating the biological potential of some new cobalt (II) complexes with acrylate and benzimidazole derivatives. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4976] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ioana Dorina Vlaicu
- National Institute of Materials Physics Atomistilor Str. 405A Măgurele‐Ilfov 077125 Romania
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of ChemistryUniversity of Bucharest 90‐92 Panduri Str 050663 Bucharest Romania
| | - Cătălin Maxim
- Department of Inorganic Chemistry, Faculty of ChemistryUniversity of Bucharest 90‐92 Panduri Str 050663 Bucharest Romania
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of BiologyUniversity of Bucharest 1‐3 Aleea Portocalelor Str 60101 Bucharest Romania
| | - Coralia Bleotu
- Stefan S Nicolau Institute of Virology 285 Mihai Bravu Ave Bucharest Romania
| | - Nicolae Stănică
- Romanian Academy‘Ilie Murgulescu’ Physical Chemistry Institute 202 Splaiul Independentei 77208 Bucharest Romania
| | - Gina Vasile Scăeţeanu
- Department of Soil SciencesUniversity of Agronomical Sciences and Veterinary Medicine 59 Mărăşti Str., Sector 1 011464 Bucharest Romania
| | - Constanţa Dulea
- Pharma Serv. International SRL 52 Sabinelor Str., Sector 5 050853 Bucharest Romania
| | - Speranța Avram
- Department of Anatomy, Animal Physiology and Biophysics, Faculty of BiologyUniversity of Bucharest 91‐95 Splaiul Independentei Bucharest Romania
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of ChemistryUniversity of Bucharest 90‐92 Panduri Str 050663 Bucharest Romania
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16
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Vlaicu ID, Borodi G, Scăețeanu GV, Chifiriuc MC, Măruțescu L, Popa M, Stefan M, Mercioniu IF, Maurer M, Daniliuc CG, Olar R, Badea M. X-ray Crystal Structure, Geometric Isomerism, and Antimicrobial Activity of New Copper(II) Carboxylate Complexes with Imidazole Derivatives. Molecules 2018; 23:molecules23123253. [PMID: 30544862 PMCID: PMC6321156 DOI: 10.3390/molecules23123253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 11/01/2018] [Revised: 12/05/2018] [Accepted: 12/05/2018] [Indexed: 11/22/2022] Open
Abstract
Five new copper(II) acrylate complexes (acr is the acrylate anion: C3H3O2) with imidazole derivatives (2-methylimidazole/2-MeIm, 5-methylimidazole/5-MeIm, 2-ethylimidazole/2-EtIm) of type: cis-[Cu(2-RIm)2(acr)2]·xH2O ((1): R = –CH3, x = 2; (4): R = –CH2–CH3, x = 0), trans-[Cu(2-RIm)2(acr)2] ((2): R = –CH3; (5): R = –CH2–CH3) and trans-[Cu(5-RIm)2(acr)2] ((3): R = –CH3) have been prepared and characterized by elemental analysis, Fourier Transform Infrared spectrometry (FTIR), Electron Paramagnetic Resonance (EPR), electronic reflectance spectroscopy, scanning electron microscopy, and mass spectrometry. The single crystal X-ray diffraction study of complexes (2) and (5) reveals that the copper(II) ion is located on an inversion center and show elongated octahedral geometry completed by two coplanar bidentate acrylates and two unidentate imidazole derivatives displayed in trans positions. For complex (4) the single crystal X-ray diffraction shows that the copper(II) ion is in a distorted octahedral environment which can be easily confused with a trigonal prism completed by two bidentate acrylates and two unidentate imidazole derivatives displayed in cis positions. These results indicate the fact that complexes (4) and (5) are the geometric isomers of the same compound bis(acrylate)-bis(2-ethylimidazole)-copper(II). Complexes (1) and (2), as well as (4) and (5), were produced simultaneously in the reaction of the corresponding copper(II) acrylate with imidazole derivatives in methanol solution. Furthermore, in order to be able to formulate potential applications of the obtained compounds, our next goal was to investigate the in vitro antimicrobial activity of the synthesized complexes against Gram-positive and Gram-negative bacteria, as well as fungal strains, of both clinical and ecological importance (biodeterioration of historical buildings). The trans isomers (2) and (5), followed by (4) have shown the broadest range of antimicrobial activity. In case of (1) and (2) isomers, the trans isomer (2) was significantly more active than cis (1), while the cis isomer (4) proved to be more active than trans (5). Taken together, the biological evaluation results indicate that the trans (2) was the most active complex, demonstrating its potential for the development of novel antimicrobial agents, with potential applications in the biomedical and restoration of architectural monuments fields.
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Affiliation(s)
- Ioana Dorina Vlaicu
- National Institute of Materials Physics, 405A Atomistilor, 077125 Magurele-Bucharest, Romania.
| | - Gheorghe Borodi
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Avenue, 400293 Cluj-Napoca, Romania.
| | - Gina Vasile Scăețeanu
- Department of Soil Sciences, University of Agronomical Sciences and Veterinary Medicine, 59 Mărăşti Str., Sector 1, 011464 Bucharest, Romania.
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1⁻3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Life, Environment and Earth Sciences Division, Research Institute of the University of Bucharest (ICUB), Spl. Independentei 91⁻95, 010271 Bucharest, Romania.
| | - Luminița Măruțescu
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1⁻3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Life, Environment and Earth Sciences Division, Research Institute of the University of Bucharest (ICUB), Spl. Independentei 91⁻95, 010271 Bucharest, Romania.
| | - Marcela Popa
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1⁻3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Life, Environment and Earth Sciences Division, Research Institute of the University of Bucharest (ICUB), Spl. Independentei 91⁻95, 010271 Bucharest, Romania.
| | - Mariana Stefan
- National Institute of Materials Physics, 405A Atomistilor, 077125 Magurele-Bucharest, Romania.
| | | | - Martin Maurer
- 3S-Pharmacological Consultation & Research GmbH, 1 Koenigsbergerstrasse, 27243 Harpstedt, Germany.
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90⁻92 Panduri Str., 050663 Bucharest, Romania.
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90⁻92 Panduri Str., 050663 Bucharest, Romania.
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Munteanu AC, Badea M, Olar R, Silvestro L, Mihaila M, Brasoveanu LI, Musat MG, Andries A, Uivarosi V. Cytotoxicity studies, DNA interaction and protein binding of new Al (III), Ga (III) and In (III) complexes with 5-hydroxyflavone. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4579] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Alexandra-Cristina Munteanu
- Department of General and Inorganic Chemistry, Faculty of Pharmacy; Carol Davila University of Medicine and Pharmacy; 6 Traian Vuia Str Bucharest 020956 Romania
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry; University of Bucharest; 90-92 Panduri Str Bucharest 050663 Romania
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry; University of Bucharest; 90-92 Panduri Str Bucharest 050663 Romania
| | - Luigi Silvestro
- PharmaServ. International SRL; 52 Sabinelor Str Bucharest 050853 Romania
| | - Mirela Mihaila
- Center of Immunology; Stefan S. Nicolau Institute of Virology; 285 Mihai Bravu Ave Bucharest 030304 Romania
| | - Lorelei Irina Brasoveanu
- Center of Immunology; Stefan S. Nicolau Institute of Virology; 285 Mihai Bravu Ave Bucharest 030304 Romania
| | - Mihaela Georgiana Musat
- Department of Biochemistry, Faculty of Pharmacy; Carol Davila University of Medicine and Pharmacy; 6 Traian Vuia Str Bucharest 020956 Romania
| | - Adrian Andries
- Department of Industrial Drugs and Pharmaceutical Biotechnology, Faculty of Pharmacy; Carol Davila University of Medicine and Pharmacy; 6 Traian Vuia Str. Bucharest 020956 Romania
| | - Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy; Carol Davila University of Medicine and Pharmacy; 6 Traian Vuia Str Bucharest 020956 Romania
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18
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Vasile Scăețeanu G, Chifiriuc MC, Bleotu C, Kamerzan C, Măruţescu L, Daniliuc CG, Maxim C, Calu L, Olar R, Badea M. Synthesis, Structural Characterization, Antimicrobial Activity, and In Vitro Biocompatibility of New Unsaturated Carboxylate Complexes with 2,2'-Bipyridine. Molecules 2018; 23:molecules23010157. [PMID: 29329277 PMCID: PMC6017882 DOI: 10.3390/molecules23010157] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/05/2018] [Accepted: 01/07/2018] [Indexed: 01/07/2023]
Abstract
The synthesis, structural characterization, cytotoxicity, and antimicrobial properties of four new complexes formed by employing acrylate anion and 2,2'-bipyridine are reported herein. X-ray crystallography revealed the trinuclear nature of [Mn₃(2,2'-bipy)₂(C₃H₃O₂)₆] (1), meanwhile complexes with general formula [M(2,2'-bipy)(C₃H₃O₂)₂(H₂O)x]∙yH₂O ((2) M: Ni, x = 1, y = 0; (3) M: Cu, x = 1, y = 0; (4) M: Zn, x = 0, y = 1; 2,2'-bipy: 2,2'-bipyridine; C₃H₃O₂: acrylate anion) were shown to be mononuclear. The lowest minimum inhibitory concentration (MIC) of 128 μg mL-1 was recorded for all four tested complexes against Candida albicans, for complex (3) against Escherichia coli, and for complex (4) against Staphylocococcus aureus. Compounds (3) and (4) were also potent efflux pumps activity inhibitors (EPI), proving their potential for use in synergistic combinations with antibiotics. Complexes (1)-(4) revealed that they were not cytotoxic to HCT-8 cells. They also proved to interfere with the cellular cycle of tumour HCT-8 cells by increasing the number of cells found in the S and G2/M phases. Taken together, these results demonstrate the potential of zinc and copper complexes for use in the development of novel antimicrobial and anti-proliferative agents.
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Affiliation(s)
- Gina Vasile Scăețeanu
- Department of Soil Sciences, University of Agronomical Sciences and Veterinary Medicine, 59 Mărăşti Str., Sector 1, 011464 Bucharest, Romania.
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Research Institute of the University of Bucharest-ICUB, Life, Environmental and Earth Sciences Division, Spl. Independentei 91-95, 010271 Bucharest, Romania.
| | - Coralia Bleotu
- Stefan S. Nicolau Institute of Virology, 285 Mihai Bravu Ave., 030304 Bucharest, Romania.
| | - Crina Kamerzan
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Research Institute of the University of Bucharest-ICUB, Life, Environmental and Earth Sciences Division, Spl. Independentei 91-95, 010271 Bucharest, Romania.
- SC Sanimed International Impex SRL, Sos Bucuresti Magurele, nr. 70F, Sector 5, 051434 Bucharest, Romania.
| | - Luminiţa Măruţescu
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Research Institute of the University of Bucharest-ICUB, Life, Environmental and Earth Sciences Division, Spl. Independentei 91-95, 010271 Bucharest, Romania.
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.
| | - Cătălin Maxim
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Larisa Calu
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
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Măruţescu L, Calu L, Chifiriuc MC, Bleotu C, Daniliuc CG, Fălcescu D, Kamerzan CM, Badea M, Olar R. Synthesis, Physico-chemical Characterization, Crystal Structure and Influence on Microbial and Tumor Cells of Some Co(II) Complexes with 5,7-Dimethyl-1,2,4-triazolo[1,5-a]pyrimidine. Molecules 2017; 22:molecules22071233. [PMID: 28737690 PMCID: PMC6152184 DOI: 10.3390/molecules22071233] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/19/2017] [Accepted: 07/19/2017] [Indexed: 01/07/2023]
Abstract
Three complexes, namely [Co(dmtp)₂(OH₂)₄][CoCl₄] (1), [Co(dmtp)₂Cl₂] (2) and [Co(dmtp)₂(OH₂)₄]Cl₂∙2H₂O (3) (dmtp: 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine), were synthesized and characterized by spectral (IR, UV-Vis-NIR), and magnetic measurements at room temperature, as well as single crystal X-ray diffraction. Complex (1) crystallizes in monoclinic system (space group C2/c), complex (2) adopts an orthorhombic system (space group Pbca), and complex (3) crystallizes in triclinic system (space group P1). Various types of extended hydrogen bonds and π-π interactions provide a supramolecular architecture for all complexes. All species were evaluated for antimicrobial activity towards planktonic and biofilm-embedded microbial cells and influence on HEp-2 cell viability, cellular cycle and gene expression.
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Affiliation(s)
- Luminiţa Măruţescu
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Environment and Earth Sciences Department, Research Institute of the University of Bucharest-ICUB, Life, Spl. Independentei 91-95, 010271 Bucharest, Romania.
| | - Larisa Calu
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Environment and Earth Sciences Department, Research Institute of the University of Bucharest-ICUB, Life, Spl. Independentei 91-95, 010271 Bucharest, Romania.
| | - Coralia Bleotu
- Stefan S Nicolau Institute of Virology, 285 Mihai Bravu Ave., 030304 Bucharest, Romania.
| | - Constantin-Gabriel Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.
| | - Denisa Fălcescu
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Crina Maria Kamerzan
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., 60101 Bucharest, Romania.
- Environment and Earth Sciences Department, Research Institute of the University of Bucharest-ICUB, Life, Spl. Independentei 91-95, 010271 Bucharest, Romania.
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
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Munteanu AC, Badea M, Olar R, Silvestro L, Dulea C, Negut CD, Uivarosi V. Synthesis and Structural Investigation of New Bio-Relevant Complexes of Lanthanides with 5-Hydroxyflavone: DNA Binding and Protein Interaction Studies. Molecules 2016; 21:molecules21121737. [PMID: 27999283 PMCID: PMC6273368 DOI: 10.3390/molecules21121737] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 11/11/2016] [Revised: 12/12/2016] [Accepted: 12/13/2016] [Indexed: 11/16/2022] Open
Abstract
In the present work, we attempted to develop new metal coordination complexes of the natural flavonoid 5-hydroxyflavone with Sm(III), Eu(III), Gd(III), Tb(III). The resultant hydroxo complexes have been characterized by a variety of spectroscopic techniques, including fluorescence, FT-IR, UV-Vis, EPR and mass spectral studies. The general chemical formula of the complexes is [Ln(C15H₉O₃)₃(OH)₂(H₂O)x]·nH₂O, where Ln is the lanthanide cation and x = 0 for Sm(III), x = 1 for Eu(III), Gd(III), Tb(III) and n = 0 for Sm(III), Gd(III), Tb(III), n = 1 for Eu(III), respectively. The proposed structures of the complexes were optimized by DFT calculations. Theoretical calculations and experimental determinations sustain the proposed structures of the hydroxo complexes, with two molecules of 5-hydroxyflavone acting as monoanionic bidentate chelate ligands. The interaction of the complexes with calf thymus DNA has been explored by fluorescence titration and UV-Vis absorption binding studies, and revealed that the synthesized complexes interact with DNA with binding constants (Kb) ~ 10⁴. Human serum albumin (HSA) and transferrin (Tf) binding studies have also been performed by fluorescence titration techniques (fluorescence quenching studies, synchronous fluorescence spectra). The apparent association constants (Ka) and thermodynamic parameters have been calculated from the fluorescence quenching experiment at 299 K, 308 K, and 318 K. The quenching curves indicate that the complexes bind to HSA with smaller affinity than the ligand, but to Tf with higher binding affinities than the ligand.
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Affiliation(s)
- Alexandra-Cristina Munteanu
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, 6 Traian Vuia Str., 020956 Bucharest, Romania.
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Luigi Silvestro
- PharmaServ. International SRL, 52 Sabinelor Str., 050853 Bucharest, Romania.
| | - Constanţa Dulea
- PharmaServ. International SRL, 52 Sabinelor Str., 050853 Bucharest, Romania.
| | - Constantin-Daniel Negut
- Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), IRASM Radiation Processing Department, Reactorului Str. 30, 077125 Magurele-Ilfov, Romania.
| | - Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, 6 Traian Vuia Str., 020956 Bucharest, Romania.
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Uivarosi V, Badea M, Olar R, Drǎghici C, Bǎrbuceanu ŞF. Synthesis and characterization of some new complexes of magnesium (II) and zinc (II) with the natural flavonoid primuletin. Molecules 2013; 18:7631-45. [PMID: 23884117 PMCID: PMC6270113 DOI: 10.3390/molecules18077631] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 06/17/2013] [Accepted: 06/19/2013] [Indexed: 12/13/2022] Open
Abstract
Two new metal complexes formulated as [Mg(L)2(H2O)2]·H2O (1) and [Zn(L)2(H2O)2]·0.5H2O (2), where HL = 5-hydroxyflavone (primuletin), have been synthesized and characterized by elemental and thermal analyses, molar conductance, IR, UV-Vis, 1H- and 13C-NMR, fluorescence and mass spectra. In solid state, complexes had shown higher fluorescence intensities comparing to the free ligand, and this behavior is appreciated as a consequence of the coordination process.
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Affiliation(s)
- Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia St, Bucharest 020956, Romania
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +40-21-318-0742; Fax: +40-21-318-0750
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri St., Bucharest 050663, Romania; E-Mails: (M.B.); (R.O.)
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri St., Bucharest 050663, Romania; E-Mails: (M.B.); (R.O.)
| | - Constantin Drǎghici
- Center of Organic Chemistry C.D. Nenitzescu, Romanian Academy, 202 B Splaiul Independenţei, Bucharest 060023, Romania; E-Mail:
| | - Ştefania Felicia Bǎrbuceanu
- Department of Organic Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia St, Bucharest 020956, Romania; E-Mail:
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Olar R, Badea M, Marinescu D, Chifiriuc CM, Bleotu C, Grecu MN, Iorgulescu EE, Bucur M, Lazar V, Finaru A. Prospects for new antimicrobials based on N,N-dimethylbiguanide complexes as effective agents on both planktonic and adhered microbial strains. Eur J Med Chem 2010; 45:2868-75. [PMID: 20363535 DOI: 10.1016/j.ejmech.2010.03.009] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2009] [Revised: 03/08/2010] [Accepted: 03/09/2010] [Indexed: 11/19/2022]
Abstract
Metal-free N,N-dimethylbiguanidium acetate and novel complexes M(DMBG)(2)(CH(3)COO)(2).nH(2)O (M: Mn(II), Ni(II), Cu(II) and Zn(II)) were screened for their antimicrobial properties against Gram-positive (Bacillus subtilis, Listeria monocytogenes, Staphylococcus aureus), Gram-negative (Klebsiella pneumoniae, Escherichia coli, Pseudomonas aeruginosa) bacteria and fungal (Candida albicans) strains. The ability of compounds to inhibit the microbial adherence ability to the inert substratum as well as their cytotoxicity was also assessed. Our results are demonstrating that some of the tested compounds are exhibiting potent antimicrobial activity accompanied by low cytotoxicity on HeLa cells. The complexes were characterized using microanalytical, IR, EPR, (1)H NMR as well as UV-vis methods. The redox behaviour of complexes was investigated by cyclic voltammetry. The new derivative (HDMBG)(CH(3)COO) crystallizes in the monoclinic P2(1)/n space group as X-ray single-crystal data indicate.
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Affiliation(s)
- Rodica Olar
- Department of Inorganic Chemistry, University of Bucharest, 90-92 Panduri St., 050663 Bucharest, Romania.
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Angelescu E, Ionescu R, Pavel O, Zăvoianu R, Bîrjega R, Luculescu C, Florea M, Olar R. Epoxidation of cyclohexene with O2 and isobutyraldehyde catalysed by cobalt modified hydrotalcites. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcata.2009.09.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Badea M, Olar R, Marinescu D, Vasile G, Jurca B, Madalan AM, Andruh M. A Michael-type reaction between acrylato ions and ethylenediamine coordinated to Ni(II). Synthesis, crystal structure and magnetic properties of [Ni2(EDDP)2(H2O)2]·2H2O (H2EDDP=ethylenediamine-N,N-dipropionic acid). INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2009.04.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mitache MM, Chifiriuc MC, Badea A, Geana OL, Bucur M, Olar R, Badea M, Panus E, Roşoiu N, Paul I, Sesan T, Lazăr V. Novel antipathogenic strategies against adherent enterobacterial strains isolated from the hospital environment. Roum Arch Microbiol Immunol 2008; 67:43-48. [PMID: 19284166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The emergence of the bacterial antibiotic multi-resistance made more and more stringent the developing of new anti-microbial strategies. The purpose of the present study was to investigate the antimicrobial potential of six (6) newly synthesized chemical compounds (derivating from phenantroline and dimethylguanin-copper complex combinations) versus 97 enterobacterial strains isolated from the hospital environment. The qualitative screening of the antimicrobial activity of the chemical compounds was performed by an adapted diffusion method. The minimal inhibitory concentrations (MIC) of the active chemical compounds were established by Mueller Hinton broth microdillution method. The tested chemical compounds were also tested for their ability to inhibit microbial adherence and biofilm development on inert substrata by a simple microtiter method. All six chemical compounds proved to have antimicrobial activity versus the most of the tested strains, the phenantroline derivatives exhibiting higher antimicrobial activity than the dimethylguanidine-copper complex combinations. The subinhibitory concentrations of the tested chemical products slightly inhibited the adherence ability of the bacterial strains to the inert substratum. Our results demonstrated that phenantroline derivatives may represent a new strategy of antimicrobial treatment, simultaneously with the bactericidal effect, the subinhibitory concentrations of these newly synthesized chemical compounds decreasing the adherence ability of bacteria to the inert substratum.
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