1
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Targeting emerging cancer hallmarks by transition metal complexes: Epigenetic reprogramming and epitherapies. Part II. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Brue CR, Dukes MW, Masotti M, Holmgren R, Meade TJ. Functional Disruption of Gli1-DNA Recognition via a Cobalt(III) Complex. ChemMedChem 2022; 17:e202200025. [PMID: 35302712 PMCID: PMC10826845 DOI: 10.1002/cmdc.202200025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Indexed: 12/29/2022]
Abstract
The aberrant activation of the Gli family of zinc finger transcription factors (ZFTFs) is associated with several types of human cancer, including medulloblastoma and basal cell carcinoma. We have reported the use of cobalt(III) Schiff-base complexes (Co(III)-sb) as potent inhibitors of ZFTFs in vivo. These complexes inhibit transcription by displacing the zinc finger domain's structural Zn(II) ion, destabilizing the alpha helix necessary for DNA recognition. Here, we describe the use of Co(III)-sb complexes for the selective inhibition of Gli1. Spectroscopic and computational studies of the Gli1 DNA binding domain found that Co(III)-sb displaced Zn(II) through direct coordination with the His residues of the Cys2 His2 Zn(II) binding site. As a result, there is a dose-dependent degradation of the alpha-helix content in the DNA binding domain of Gli1 and corresponding inhibition of consensus sequence recognition. We conclude that this strategy is well suited for the development of new and potent inhibitors of Gli1.
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Affiliation(s)
- Christopher R Brue
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208-3113, USA
| | - Meghan W Dukes
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208-3113, USA
| | - Meghan Masotti
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208-3113, USA
| | - Robert Holmgren
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208-3113, USA
| | - Thomas J Meade
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208-3113, USA
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3
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Giriraj K, Mohamed Kasim MS, Balasubramaniam K, Thangavel SK, Venkatesan J, Suresh S, Shanmugam P, Karri C. Various coordination modes of new coumarin Schiff bases toward Cobalt (III) ion: Synthesis, spectral characterization, in vitro cytotoxic activity, and investigation of apoptosis. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6536] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kalaiarasi Giriraj
- Department of Chemistry Karpagam Academy of Higher Education (Deemed to be University) Coimbatore 641021 India
| | - Mohamed Subarkhan Mohamed Kasim
- The First Affiliated Hospital; Key Laboratory of Combined Multi Organ Transplantation, Ministry of Public Health, School of Medicine Zhejiang University Hangzhou PR China
| | - Keerthana Balasubramaniam
- Department of Microbiology Karpagam Academy of Higher Education (Deemed to be University) Coimbatore 641021 India
| | - Sathiya Kamatchi Thangavel
- Centre for Organometallic Chemistry, School of Chemistry Bharathidasan University Tiruchirappalli 620024 India
| | - Janani Venkatesan
- Department of Chemistry Karpagam Academy of Higher Education (Deemed to be University) Coimbatore 641021 India
| | - Sharmila Suresh
- Department of Chemistry Karpagam Academy of Higher Education (Deemed to be University) Coimbatore 641021 India
| | - Pritha Shanmugam
- Department of Chemistry Karpagam Academy of Higher Education (Deemed to be University) Coimbatore 641021 India
| | - Chiranjeevi Karri
- Department of Chemistry Karpagam Academy of Higher Education (Deemed to be University) Coimbatore 641021 India
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4
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Pruszkowska K, Stasyuk OA, Zep A, Krówczyński A, Sicinski RR, Solà M, Cyrański MK. Effect of Diamine Bridge on Reactivity of Tetradentate ONNO Nickel(II) Complexes. Chemphyschem 2021; 23:e202100741. [PMID: 34783442 DOI: 10.1002/cphc.202100741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/15/2021] [Indexed: 11/08/2022]
Abstract
Two new square planar ONNO nickel(II) complexes C2_core and C3_core have been synthesized and characterized by single crystal X-ray diffraction, NMR spectroscopy, thermogravimetry, and DFT calculations. The experimental results revealed the effect of the length of diamine bridge in the ligand on the behavior of the studied complexes in the reaction with N-heterocyclic aromatic amines, while DFT calculations provided a basis for the rationalization of this observation. The complex with propylenediamine bridge (C3_core) readily reacts with pyridine and its derivatives to form high-spin (paramagnetic) complexes with octahedral geometry as characterized by X-ray diffraction; electron-donating substituents on the pyridine ring facilitate the coordination of axial ligands. In contrast, the complex with ethylenediamine bridge (C2_core) does not undergo such a reaction because of the high deformation energy of the core required for the formation of C2_Py complex.
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Affiliation(s)
- Kamila Pruszkowska
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Olga A Stasyuk
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland.,Institut de Química Computacional and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Anna Zep
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Adam Krówczyński
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Rafal R Sicinski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Miquel Solà
- Institut de Química Computacional and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Michał K Cyrański
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
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5
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Chan TG, Ruehl CL, Morse SV, Simon M, Rakers V, Watts H, Aprile FA, Choi JJ, Vilar R. Modulation of amyloid-β aggregation by metal complexes with a dual binding mode and their delivery across the blood-brain barrier using focused ultrasound. Chem Sci 2021; 12:9485-9493. [PMID: 34349923 PMCID: PMC8278877 DOI: 10.1039/d1sc02273c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 06/14/2021] [Indexed: 11/21/2022] Open
Abstract
One of the key hallmarks of Alzheimer's disease is the aggregation of the amyloid-β peptide to form fibrils. Consequently, there has been great interest in studying molecules that can disrupt amyloid-β aggregation. While a handful of molecules have been shown to inhibit amyloid-β aggregation in vitro, there remains a lack of in vivo data reported due to their inability to cross the blood-brain barrier. Here, we investigate a series of new metal complexes for their ability to inhibit amyloid-β aggregation in vitro. We demonstrate that octahedral cobalt complexes with polyaromatic ligands have high inhibitory activity thanks to their dual binding mode involving π-π stacking and metal coordination to amyloid-β (confirmed via a range of spectroscopic and biophysical techniques). In addition to their high activity, these complexes are not cytotoxic to human neuroblastoma cells. Finally, we report for the first time that these metal complexes can be safely delivered across the blood-brain barrier to specific locations in the brains of mice using focused ultrasound.
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Affiliation(s)
- Tiffany G Chan
- Department of Chemistry, Imperial College London White City Campus, 82 Wood Lane London W12 0BZ UK
- Department of Bioengineering, Imperial College London London SW7 2AZ UK
- Centre of Excellence in Neurotechnology, Imperial College London London SW7 2AZ UK
| | - Carmen L Ruehl
- Department of Chemistry, Imperial College London White City Campus, 82 Wood Lane London W12 0BZ UK
| | - Sophie V Morse
- Department of Bioengineering, Imperial College London London SW7 2AZ UK
| | - Michelle Simon
- Department of Chemistry, Imperial College London White City Campus, 82 Wood Lane London W12 0BZ UK
| | - Viktoria Rakers
- Department of Chemistry, Imperial College London White City Campus, 82 Wood Lane London W12 0BZ UK
| | - Helena Watts
- Department of Bioengineering, Imperial College London London SW7 2AZ UK
- Department of Brain Sciences, Imperial College London London W12 0NN UK
| | - Francesco A Aprile
- Department of Chemistry, Imperial College London White City Campus, 82 Wood Lane London W12 0BZ UK
| | - James J Choi
- Department of Bioengineering, Imperial College London London SW7 2AZ UK
| | - Ramon Vilar
- Department of Chemistry, Imperial College London White City Campus, 82 Wood Lane London W12 0BZ UK
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6
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Frei A, King AP, Lowe GJ, Cain AK, Short FL, Dinh H, Elliott AG, Zuegg J, Wilson JJ, Blaskovich MAT. Nontoxic Cobalt(III) Schiff Base Complexes with Broad-Spectrum Antifungal Activity. Chemistry 2021; 27:2021-2029. [PMID: 33231906 PMCID: PMC7855930 DOI: 10.1002/chem.202003545] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/03/2020] [Indexed: 12/21/2022]
Abstract
Resistance to currently available antifungal drugs has quietly been on the rise but overshadowed by the alarming spread of antibacterial resistance. There is a striking lack of attention to the threat of drug-resistant fungal infections, with only a handful of new drugs currently in development. Given that metal complexes have proven to be useful new chemotypes in the fight against diseases such as cancer, malaria, and bacterial infections, it is reasonable to explore their possible utility in treating fungal infections. Herein we report a series of cobalt(III) Schiff base complexes with broad-spectrum antifungal activity. Some of these complexes show minimum inhibitory concentrations (MIC) in the low micro- to nanomolar range against a series of Candida and Cryptococcus yeasts. Additionally, we demonstrate that these compounds show no cytotoxicity against both bacterial and human cells. Finally, we report the first in vivo toxicity data on these compounds in Galleria mellonella, showing that doses as high as 266 mg kg-1 are tolerated without adverse effects, paving the way for further in vivo studies of these complexes.
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Affiliation(s)
- Angelo Frei
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - A. Paden King
- Department of Chemistry and Chemical BiologyCornell UniversityIthacaNY14853USA
| | - Gabrielle J. Lowe
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - Amy K. Cain
- Department of Molecular SciencesMacquarie UniversitySydneyNSW2109Australia
| | - Francesca L. Short
- Department of Molecular SciencesMacquarie UniversitySydneyNSW2109Australia
| | - Hue Dinh
- Department of Molecular SciencesMacquarie UniversitySydneyNSW2109Australia
- Department of Biological SciencesMacquarie UniversitySydneyNSW2109Australia
| | - Alysha G. Elliott
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - Johannes Zuegg
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - Justin J. Wilson
- Department of Chemistry and Chemical BiologyCornell UniversityIthacaNY14853USA
| | - Mark A. T. Blaskovich
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
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7
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Roberts KF, Brue CR, Preston A, Baxter D, Herzog E, Varelas E, Meade TJ. Cobalt(III) Schiff base complexes stabilize non-fibrillar amyloid-β aggregates with reduced toxicity. J Inorg Biochem 2020; 213:111265. [PMID: 33059154 DOI: 10.1016/j.jinorgbio.2020.111265] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/18/2020] [Accepted: 09/24/2020] [Indexed: 12/12/2022]
Abstract
The aggregation of amyloid-β (Aβ) is believed to be foundational to the pathogenesis of Alzheimer's disease (AD). In vitro aggregation kinetics have been shown to correlate with rates of disease progression in both AD patients and animal models, thus proving to be a useful metric for testing Aβ-targeted therapeutics. Here we present evidence of cobalt(III) Schiff base complex ([Co(acetylacetonate)(NH3)2]Cl; Co(III)-sb) modulation of Aβ aggregation kinetics by a variety of complementary techniques. These include Thioflavin T (ThT) fluorescence, circular dichroism (CD) spectroscopy, transmission electron microscopy (TEM), and atomic force microscopy (AFM). Our data was fitted to kinetic rate laws using a mathematical model developed by Knowles et al. in order to extract mechanistic information about the effect of Co(III)-sb on aggregation kinetics. Our analysis revealed that Co(III)-sb alters Aβ aggregation by decreasing the polymerization rate and increasing the nucleation rate, suggesting that Co(III)-sb causes Aβ to rapidly stabilize oligomeric species with reduced elongation into mature fibrils. This result was corroborated by TEM and AFM of Aβ aggregates in vitro. We also demonstrate that Aβ aggregate mixtures produced in the presence of Co(III)-sb exhibit decreased cytotoxicity compared to untreated samples.
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Affiliation(s)
- Kaleigh F Roberts
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL 60208, United States
| | - Christopher R Brue
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL 60208, United States
| | - Anna Preston
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL 60208, United States
| | - Damonick Baxter
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL 60208, United States
| | - Emma Herzog
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL 60208, United States
| | - Eleni Varelas
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL 60208, United States
| | - Thomas J Meade
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL 60208, United States.
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8
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Cu(II) complexes of cyclotriphosphazene bearing Schiff bases: Synthesis, structural characterization, DFT calculations, absorbance and thermal properties. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114541] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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9
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Abbehausen C. Zinc finger domains as therapeutic targets for metal-based compounds - an update. Metallomics 2020; 11:15-28. [PMID: 30303505 DOI: 10.1039/c8mt00262b] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Zinc finger proteins are one of the most abundant families of proteins and present a wide range of structures and functions. The structural zinc ion provides the correct conformation to specifically recognize DNA, RNA and protein sequences. Zinc fingers have essential functions in transcription, protein degradation, DNA repair, cell migration, and others. Recently, reports on the extensive participation of zinc fingers in disease have been published. On the other hand, much information remains to be unravelled as many genomes and proteomes are being reported. A variety of zinc fingers have been identified; however, their functions are still under investigation. Because zinc fingers have identified functions in several diseases, they are being increasingly recognized as drug targets. The replacement of Zn(ii) by another metal ion in zinc fingers is one of the most prominent methods of inhibition. From one side, zinc fingers play roles in the toxicity mechanisms of Ni(ii), Hg(ii), Cd(ii) and others. From the other side, gold, platinum, cobalt, and selenium complexes are amongst the compounds being developed as zinc finger inhibitors for therapy. The main challenge in the design of therapeutic zinc finger inhibitors is to achieve selectivity. Recently, the design of novel compounds and elucidation of the mechanisms of zinc substitution have renewed the possibilities of selective zinc finger inhibition by metal complexes. This review aims to update the status of novel strategies to selectively target zinc finger domains by metal complexes.
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Affiliation(s)
- C Abbehausen
- Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, CEP 13083-970, Campinas, São Paulo, Brazil.
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10
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Śmiłowicz D, Metzler-Nolte N. Bioconjugates of Co(III) complexes with Schiff base ligands and cell penetrating peptides: Solid phase synthesis, characterization and antiproliferative activity. J Inorg Biochem 2020; 206:111041. [PMID: 32120161 DOI: 10.1016/j.jinorgbio.2020.111041] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 02/17/2020] [Accepted: 02/17/2020] [Indexed: 10/25/2022]
Abstract
In this work we synthesized a chelating Schiff base by a single condensation of salicylaldehyde with 3,4-diamino benzoic acid (1). This ligand was used further for complexation to CoCl2·6H2O under nitrogen. In the next step, three six-coordinate Co(III) complexes were synthesized by coordinating this complex with imidazole (2), 2-methyimidazole (3) and N-Boc-l-histidine methyl ester (4) (Boc: tert.-butoxycarbonyl) in axial positions with simultaneous oxidation of Co(II) to Co(III) under ambient environment. All Co(III) complexes were characterized by multinuclear NMR spectroscopy (1H, 13C and 59Co NMR), FT-IR, mass spectrometry and HPLC. The Co(III) complexes were conjugated to three different cell penetrating peptides: FFFF (P1), RRRRRRRRRGAL (P2) and FFFFRRRRRRRRRGAL (P3). Standard solid-phase peptide chemistry was used for the synthesis of cell penetrating peptides. Coupling of N-terminal peptides with the cobalt complexes, possessing a carboxylic group on the tetradentate Schiff base ligand, afforded Co(III)-peptide bioconjugates, which were purified by semi-preparative HPLC and characterized by analytical HPLC and mass spectrometry. The antiproliferative activity of the synthesized compounds was studied against different human tumour cell lines: lung cancer A549, liver cancer HepG2 and normal human fibroblasts GM5657T, in comparison with the activity of cisplatin as a reference drug. The bioconjugate 21 containing the Co complex 4 and the combined phenylalanine and polyarginine cell penetrating sequence P3 shows better activity against the liver cancer line HepG2 than the parent Co(III) complex 4.
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Affiliation(s)
- Dariusz Śmiłowicz
- Inorganic Chemistry I - Bioinorganic Chemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Nils Metzler-Nolte
- Inorganic Chemistry I - Bioinorganic Chemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801 Bochum, Germany.
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11
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Aðalsteinsson HM, Lima FA, Galuppo C, Abbehausen C. Evaluation of cobalt complexes with tripod ligands for zinc finger targeting. Dalton Trans 2020; 49:16143-16153. [DOI: 10.1039/d0dt00067a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report the ability of CoII and CoIII complexes of tri(2-pyridylmethyl)amine and N,N-di(2-pyridylmethyl)glycinate to disrupt zinc fingers.
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Affiliation(s)
| | - Frederico A. Lima
- European X-Ray Free-Electron Laser Facility GmbH
- 22869 Schenefeld
- Germany
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12
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Mandal S, Sen T, Mandal U, Bhunia D, Rizzoli C, Bandyopadhyay D. Synthesis, crystal structure and antibacterial activity of manganese(III) and cobalt(III) complexes containing pentadentate Schiff bases of a common amine and thiocyanate. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1704275] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Santanu Mandal
- Department of Chemistry, Bankura Christian College, Bankura, West Bengal, India
| | - Tinku Sen
- Department of Chemistry, Bankura Christian College, Bankura, West Bengal, India
| | - Uttam Mandal
- Department of Physics, Bankura Sammilani College, Bankura, West Bengal, India
| | - Dipankar Bhunia
- Department of Chemistry, Bankura Christian College, Bankura, West Bengal, India
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13
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Zarei L, Asadi Z, Samolova E, Dusek M. Preparation of a dimer from self-complementary of cobalt(III) complex with dissymmetric compartmental ligand and study of the interaction of the complex with DNA and BSA. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1694148] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Leila Zarei
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, Iran
| | - Zahra Asadi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, Iran
| | - Erika Samolova
- Institute of Physics, ASCR, Prague, Czech Republic
- Department of Inorganic Chemistry, Pavol Jozef Šafárik University in Košice, Slovak Republic Košice
| | - Michal Dusek
- Institute of Physics, ASCR, Prague, Czech Republic
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14
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Cui YM, Wang YQ, Su XX, Huang H, Zhang P. Synthesis, X-Ray Crystal Structure, and Catalytic Epoxidation Property of an Oxovanadium(V) Complex with Hydrazone and Ethyl Maltol Ligands. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619080092] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Recent developments in penta-, hexa- and heptadentate Schiff base ligands and their metal complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.010] [Citation(s) in RCA: 189] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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16
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King AP, Gellineau HA, MacMillan SN, Wilson JJ. Physical properties, ligand substitution reactions, and biological activity of Co(iii)-Schiff base complexes. Dalton Trans 2019; 48:5987-6002. [PMID: 30672949 PMCID: PMC6504617 DOI: 10.1039/c8dt04606a] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Four cobalt(iii) complexes of the general formula [Co(Schiff base)(L)2]+, where L is ammonia (NH3) or 3-fluorobenzylamine (3F-BnNH2), were synthesized. The complexes were characterized by NMR spectroscopy, mass spectrometry, and X-ray crystallography. Their electrochemical properties, ligand substitution mechanisms, and ligand exchange rates in aqueous buffer were investigated. These physical properties were correlated to the cellular uptake and anticancer activities of the complexes. The complexes undergo sequential, dissociative ligand substitution, with the exchange rates depending heavily on the axial ligands. Eyring analyses revealed that the relative ligand exchange rates were largely impacted by differences in the entropy, rather than enthalpy, of activation for the complexes. Performing the substitution reactions in the presence of ascorbate led to a change in the reaction profile and kinetics, but no change in the final product. The cytotoxic activity of the complexes correlates with both the ligand exchange rate and reduction potential, with the more easily reduced and rapidly substituted complexes showing higher toxicity. These relationships may be valuable for the rational design of Co(iii) complexes as anticancer or antiviral prodrugs.
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Affiliation(s)
- A Paden King
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
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17
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Cui YM, Liu WT, Yan WX. Two cis-Dioxomolybdenum(VI) Complexes with Tridentate ONO Aroylhydrazone Schiff Bases: Syntheses, Characterization, Crystal Structures, and Catalytic Epoxidation Property. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328419030023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Manojkumar Y, Ambika S, Arulkumar R, Gowdhami B, Balaji P, Vignesh G, Arunachalam S, Venuvanalingam P, Thirumurugan R, Akbarsha MA. Synthesis, DNA and BSA binding, in vitro anti-proliferative and in vivo anti-angiogenic properties of some cobalt(iii) Schiff base complexes. NEW J CHEM 2019. [DOI: 10.1039/c9nj01269a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In the recent times metal complexes with dual mechanisms of action, anti-cancer and anti-angiogenic, have gained substantial interest in the field of medicinal chemistry.
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Affiliation(s)
| | - Subramanian Ambika
- Department of Chemistry
- Bharathidasan University
- Tiruchirappalli-620024
- India
| | - Rasu Arulkumar
- Department of Chemistry
- Bharathidasan University
- Tiruchirappalli-620024
- India
| | - Balakrishnan Gowdhami
- National Center for Alternatives to Animal Experiments
- Bharathidasan University
- Tiruchirappalli-620024
- India
| | - Perumalsamy Balaji
- National Center for Alternatives to Animal Experiments
- Bharathidasan University
- Tiruchirappalli-620024
- India
| | - Gobalsamy Vignesh
- Department of Chemistry
- Einstein Art and Science College
- Tirunelveli-627012
- India
| | | | | | - Ramaswamy Thirumurugan
- National Center for Alternatives to Animal Experiments
- Bharathidasan University
- Tiruchirappalli-620024
- India
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19
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Ghosh K, Banerjee S, Chattopadhyay S. Relative stability of the cis and trans isomers of octahedral cobalt(iii) complexes of the type [Co(N2O2)X2] with tetradentate salen type Schiff bases: a combined theoretical and experimental study. CrystEngComm 2019. [DOI: 10.1039/c9ce00922a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Energies of cis and trans isomers of a series of octahedral cobalt(iii) complexes with salen type Schiff bases have been estimated by DFT calculations.
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Affiliation(s)
- Kousik Ghosh
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata-700032
- India
| | - Snehasis Banerjee
- Department of Chemistry
- Govt. College of Engineering and Leather Technology
- Kolkata 700106
- India
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20
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Zhou L, Hu Q, Chai LQ, Mao KH, Zhang HS. X-ray characterization, spectroscopic, DFT calculations and Hirshfeld surface analysis of two 3-D supramolecular mononuclear zinc(II) and trinuclear copper(II) complexes. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.10.052] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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21
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Ghosh M, Mandal S, Fleck M, Saha R, Rizzoli C, Bandyopadhyay D. Synthesis, crystal structure, and antimicrobial activity of a series of cobalt(III) Schiff base complexes. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1532080] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Mahendra Ghosh
- Department of Chemistry, Bankura Christian College, Bankura, India
| | - Santanu Mandal
- Department of Chemistry, Bankura Christian College, Bankura, India
| | - Michel Fleck
- Institute of Mineralogy and Crystallography, University of Vienna, Vienna, Austria
| | - Rajat Saha
- Department of Chemistry, Kazi Nazrul University, Asansol, India
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22
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Renfrew AK, O'Neill ES, Hambley TW, New EJ. Harnessing the properties of cobalt coordination complexes for biological application. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.11.027] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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23
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Co(III) complexes based on α-N-heterocyclic thiosemicarbazone ligands: DNA binding, DNA cleavage, and topoisomerase I/II inhibitory activity studies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.074] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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24
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Synthesis, structure and catalytic activities of nickel(II) complexes bearing N4 tetradentate Schiff base ligand. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.01.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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25
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Zhang C, Sutherland M, Herasymchuk K, Clarke RM, Thompson JR, Chiang L, Walsby CJ, Storr T. Octahedral Co(III) salen complexes: the role of peripheral ligand electronics on axial ligand release upon reduction. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0277] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A series of octahedral CoIII salen complexes (where salen represents a N2O2 bis-Schiff-base bis-phenolate framework) were prepared with axial imidazole ligating groups. When using 1-methylimidazole (1-MeIm) axial ligands, the CoIII/CoII reduction potential could be altered by 220 mV via variation of the electron-donating ability of the para-ring substituents (R = H (1), OMe (2), tBu (3), Br (4), NO2 (5), and CF3 (6)). In addition, the irreversibility of the reduction process suggested substantial geometrical changes and axial ligand exchange upon reduction to the more labile CoII oxidation state. Installing an imidazole-coumarin conjugate as the axial ligands resulted in fluorescence quenching when bound to the CoIII centre (R = H (7), OMe (8), and CF3 (9)). The redox properties and fluorescence increase upon ligand release for 7–9 were studied under reducing conditions and in the presence of excess competing ligand (1-MeIm). It was determined that the Lewis acidity of the CoIII centre was the dominant factor in controlling axial ligand exchange for this series of complexes.
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Affiliation(s)
- Chen Zhang
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Mathew Sutherland
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Khrystyna Herasymchuk
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Ryan M. Clarke
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - John R. Thompson
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Linus Chiang
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Charles J. Walsby
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
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Dehkhodaei M, Khorshidifard M, Amiri Rudbari H, Sahihi M, Azimi G, Habibi N, Taheri S, Bruno G, Azadbakht R. Synthesis, characterization, crystal structure and DNA, HSA-binding studies of four Schiff base complexes derived from salicylaldehyde and isopropylamine. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.05.035] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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27
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King AP, Gellineau HA, Ahn JE, MacMillan SN, Wilson JJ. Bis(thiosemicarbazone) Complexes of Cobalt(III). Synthesis, Characterization, and Anticancer Potential. Inorg Chem 2017; 56:6609-6623. [PMID: 28509538 PMCID: PMC8113979 DOI: 10.1021/acs.inorgchem.7b00710] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nine bis(thiosemicarbazone) (BTSC) cobalt(III) complexes of the general formula [Co(BTSC)(L)2]NO3 were synthesized, where BTSC = diacetyl bis(thiosemicarbazone) (ATS), pyruvaldehyde bis(thiosemicarbazone) (PTS), or glyoxal bis(thiosemicarbazone) (GTS) and L = ammonia, imidazole (Im), or benzylamine (BnA). These compounds were characterized by multinuclear NMR spectroscopy, mass spectrometry, cyclic voltammetry, and X-ray crystallography. Their stability in phosphate-buffered saline was investigated and found to be highly dependent on the nature of the axial ligand, L. These studies revealed that complex stability is primarily dictated by the axial ligand following the sequence NH3 > Im > BnA. The cellular uptake and cytotoxicity in cancer cells were also determined. Both the cellular uptake and cytotoxicity were significantly affected by the nature of the equatorial BTSC. Complexes of ATS were taken up much more effectively than those of PTS and GTS. The cytotoxicity of the complexes was correlated to that of the free ligand. Cell uptake and cytotoxicity were also determined under hypoxic conditions. Only minor differences in the hypoxia activity and uptake were observed. Treatment of the cancer cells with the copper-depleting agent tetrathiomolybdate decreased the cytotoxic potency of the complexes, indicating that they may operate via a copper-dependent mechanism. These results provide a structure-activity relationship for this class of compounds, which may be applied for the rational design of new cobalt(III) anticancer agents.
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Affiliation(s)
- A. Paden King
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Hendryck A. Gellineau
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Jung-Eun Ahn
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Samantha N. MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
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Xue L, Deng D, Wang Q. Synthesis, crystal structures, and antibacterial activity of copper(II) and cobalt(III) complexes derived from 2-[(2-dimethylaminoethylimino)methyl]-4-methylphenol. RUSS J COORD CHEM+ 2017. [DOI: 10.1134/s107032841703006x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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29
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Jiang L, Zhang DY, Suo JJ, Gu W, Tian JL, Liu X, Yan SP. Synthesis, magnetism and spectral studies of six defective dicubane tetranuclear {M4O6} (M = NiII, CoII, ZnII) and three trinuclear CdII complexes with polydentate Schiff base ligands. Dalton Trans 2016; 45:10233-48. [DOI: 10.1039/c6dt00380j] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Six defective dicubane face-shared and three trinuclear complexes are synthesized. The magnetic behaviors of NiII/CoII complexes and fluorescence properties of ZnII and CdII are studied.
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Affiliation(s)
- Lin Jiang
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Dong-Yan Zhang
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Jing-Jing Suo
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Wen Gu
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Jin-Lei Tian
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Xin Liu
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Shi-Ping Yan
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
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