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Romo AIB, Carepo MP, Levín P, Nascimento OR, Díaz DE, Rodríguez-López J, León IE, Bezerra LF, Lemus L, Diógenes ICN. Synergy of DNA intercalation and catalytic activity of a copper complex towards improved polymerase inhibition and cancer cell cytotoxicity. Dalton Trans 2021; 50:11931-11940. [PMID: 34374389 DOI: 10.1039/d1dt01358k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Improving the binding of metal complexes to DNA to boost cancer cell cytotoxicity requires fine tuning of their structural and chemical properties. Copper has been used as a metal center in compounds containing intercalating ligands due to its ability to catalytically generate reactive oxygen species (ROS), such as hydroxyl radicals (OH˙). We envision the synergy of DNA binding and ROS generation in proximity to target DNA as a powerful chemotherapy treatment. Here, we explore the use of [Cu(2CP-Bz-SMe)]2+ (2CP-Bz-SMe = 1,3-bis(1,10-phenanthrolin-2-yloxy)-N-(4-(methylthio)benzylidene)propan-2-amine) for this purpose by characterizing its cytotoxicity, DNA binding, and ability to affect DNA replication through the polymerase chain reaction - PCR and nuclease assays. We determined the binding (Kb) and Stern-Volmer constants (KSV) for complex-DNA association of 5.8 ± 0.14 × 104 and 1.64 (±0.08), respectively, through absorption titration and competitive fluorescence experiments. These values were superior to those of other Cu-complex intercalators. We hypothesize that the distorted trigonal bipyramidal geometry of [Cu(2CP-Bz-SMe)]2+ allows the phenanthroline fragments to be better accommodated into the DNA double helix. Moreover, the aromaticity of these fragments increases the local hydrophobicity thus increasing the affinity for the hydrophobic domains of DNA. Nuclease assays in the presence of common reducing agents ascorbic acid, nicotinamide adenine dinucleotide, and glutathione showed the effective degradation of DNA due to the in situ generation of OH˙. The [Cu(2CP-Bz-SMe)]2+ complex showed cytotoxicity against the following human cancer cells lines A549, MCF-7, MDA-MB-231 and MG-63 with half maximal inhibitory concentration (IC50) values of 4.62 ± 0.48, 5.20 ± 0.76, 5.70 ± 0.42 and 2.88 ± 0.66 μM, respectively. These low values of IC50, which are promising if compared to that of cisplatin, are ascribed to the synergistic effect of ROS generation with the intercalation ability into the DNA minor grooves and blocking DNA replication. This study introduces new principles for synergizing the chemical and structural properties of intercalation compounds for improved drug-DNA interactions targeting cancer.
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Affiliation(s)
- Adolfo I B Romo
- Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, Cx. Postal 6021, Fortaleza, CE 60451-970, Brasil.
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2
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Ren D, Jin YT, Liu TY, Wang X. Phenanthroline-Based Polyarylate Porous Membranes with Rapid Water Transport for Metal Cation Separation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:7605-7616. [PMID: 31968159 DOI: 10.1021/acsami.9b22086] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The selective separation of ions in terms of extremely similar size and properties remains an important challenge in water purification. We innovated a kind of porous nanofilm via interfacial polymerization using rigid heterocyclic ligands to achieve high valent cation selectivity and rapid water/ion transport. The interconnected microporosity and uniformly distributed cation-affinitive sites of the ultrathin membranes enabled water permeation (7.5 L m-2 h-1 bar-1), ion permeance of Na+ (1.5 mol m-2 h-1 bar-1), and Mg2+/Na+ permselectivity (2.1) during nanofiltration. The forward osmosis exhibited a prominent water flux of 95 LMH at 1 M NaCl draw solution, which expanded various applications. The polyarylate membranes comprising 4,7-diphenyl-1,10-phenanthroline showed a higher water permeation and ion selectivity than the planar monomers, e.g., resorcinol. A distinct fluorescence responsiveness existed between membranes and cations for the interaction characterization. Host-guest nuclear magnetic resonance (NMR) spectroscopy and solid-state nuclear magnetic resonance spectroscopy characterized the preferential affinitive of divalent/high-valent cations in the interconnected microporous powders; an ultraviolet spectrophotometer characterized the light responsiveness of the porous nanofilms. Such an active membrane has potential applications in selective separation and adsorption of cations, photocatalytic materials, photosensors, and other fields.
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Affiliation(s)
- Dan Ren
- Department of Chemical Engineering , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Yu-Tao Jin
- Department of Chemical Engineering , Tsinghua University , Beijing 100084 , People's Republic of China
- Beijing Scinor Membrane Technology Co., Ltd. , Beijing 100083 , People's Republic of China
| | - Tian-Yin Liu
- Department of Chemical Engineering , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Xiaolin Wang
- Department of Chemical Engineering , Tsinghua University , Beijing 100084 , People's Republic of China
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P V, B SK, B S, P V AL. Copper-metformin ternary complexes: Thermal, photochemosensitivity and molecular docking studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 90:621-633. [PMID: 29853132 DOI: 10.1016/j.msec.2018.04.052] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 04/07/2018] [Accepted: 04/17/2018] [Indexed: 11/24/2022]
Abstract
The copper(II) complexes [Cu(Cl)2(met)(o-phen)] (1), [Cu(Cl)2(met)(en)] (2) and [Cu(Cl)2(met)(opda)] (3) (met = metformin, o-phen = ortho-phenanthroline, en = ethylenediamine, opda = ortho-phenylenediamine) were synthesized and characterized by LC-MS, elemental analysis, molar conductance, thermal analysis, infrared spectra, magnetic moment, electronic spectra and XRD studies. The metal center was found in an octahedral geometry. The activation thermodynamic properties were calculated using Coats-Redfern method. Thermal decomposition processes of complexes 1, 2, 3 are non-spontaneous, i.e., the complexes are thermally stable. The positive value of Gibbs free energy of decomposition (ΔG⁎) for the Cu(II) complexes is non-spontaneous processes. UV-Visible absorption, fluorescence, and viscosity measurements have been conducted to assess the interaction of the complexes with CT DNA. The complexes showed absorption hyperchromism in its UV-Vis spectrum with DNA. The binding constants Kb from UV-Vis absorption studies were 4.6 × 105, 1.48 × 105, 2.09 × 105 M-1 for 1, 2, 3 respectively and Stern-Volmer quenching constants (Ksq) from fluorescence studies were 0.636, 0.293, 0.487 for 1, 2, 3 respectively. Finally, viscosity measurements revealed that the binding of the complexes with CT-DNA could be surface binding, mainly due to groove binding. The activity of complexes towards DNA cleavage decreases in the order of 1 > 3 > 2. The complexes were docked in to B-DNA sequence, 5'(D*AP*CP*CP*GP*AP*CP*GP*TP*CP*GP*GP*T)-3' retrieved from protein data bank (PDB ID: 423D), using Discovery Studio 2.1 software.
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Affiliation(s)
- Vasantha P
- Department of Chemistry, University College for Women, Osmania University, Koti, Hyderabad, Telangana State 500095, India
| | - Sathish Kumar B
- Department of Chemistry, University College for Women, Osmania University, Koti, Hyderabad, Telangana State 500095, India; Department of Chemistry, Osmania University, Tarnaka, Hyderabad, Telangana State 500007, India
| | - Shekhar B
- Department of Chemistry, University College for Women, Osmania University, Koti, Hyderabad, Telangana State 500095, India; Department of Chemistry, Osmania University, Tarnaka, Hyderabad, Telangana State 500007, India
| | - Anantha Lakshmi P V
- Department of Chemistry, Osmania University, Tarnaka, Hyderabad, Telangana State 500007, India; Department of Chemistry, University College of Technology, Osmania University, Tarnaka, Hyderabad, Telangana State 500007, India.
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Shekhar B, Vasantha P, Sathish Kumar B, Anantha Lakshmi P. Multispectroscopic DNA interaction and Docking studies. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4254] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- B. Shekhar
- Department of Chemistry; University College for Women, Osmania University; Koti Hyderabad Telangana State 500095 India
- Department of Chemistry; Osmania University; Tarnaka Hyderabad Telangana State 500007 India
| | - P. Vasantha
- Department of Chemistry; University College for Women, Osmania University; Koti Hyderabad Telangana State 500095 India
| | - B. Sathish Kumar
- Department of Chemistry; University College for Women, Osmania University; Koti Hyderabad Telangana State 500095 India
- Department of Chemistry; Osmania University; Tarnaka Hyderabad Telangana State 500007 India
| | - P.V. Anantha Lakshmi
- Department of Chemistry; Osmania University; Tarnaka Hyderabad Telangana State 500007 India
- Department of Chemistry; University College of Technology, Osmania University; Tarnaka Hyderabad Telangana State 500007 India
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Vasantha P, Sathish Kumar B, Shekhar B, Anantha Lakshmi P. Cobalt(II)–metformin complexes containing α‐diimine/α‐diamine as auxiliary ligand: DNA binding properties. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4074] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- P. Vasantha
- Department of ChemistryUniversity College for Women, Osmania University Koti, Hyderabad Telangana State 500095 India
| | - B. Sathish Kumar
- Department of ChemistryUniversity College for Women, Osmania University Koti, Hyderabad Telangana State 500095 India
- Department of ChemistryOsmania University Tarnaka, Hyderabad Telangana State 500007 India
| | - B. Shekhar
- Department of ChemistryUniversity College for Women, Osmania University Koti, Hyderabad Telangana State 500095 India
| | - P.V. Anantha Lakshmi
- Department of ChemistryUniversity College for Women, Osmania University Koti, Hyderabad Telangana State 500095 India
- Department of ChemistryOsmania University Tarnaka, Hyderabad Telangana State 500007 India
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New isomeric Cu(NO 2 -phen) 2 Br]Br complexes: Crystal structure, Hirschfeld surface, physicochemical, solvatochromism, thermal, computational and DNA-binding analysis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 171:9-19. [DOI: 10.1016/j.jphotobiol.2017.04.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/11/2017] [Accepted: 04/17/2017] [Indexed: 11/22/2022]
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İnci D, Aydın R, Vatan Ö, Yılmaz D, Gençkal HM, Zorlu Y, Cavaş T. Binary and ternary new water soluble copper(II) complexes of l-tyrosine and substituted 1,10-phenanthrolines: effect of substitution on DNA interactions and cytotoxicities. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 145:313-324. [PMID: 25795604 DOI: 10.1016/j.saa.2015.03.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 01/06/2015] [Accepted: 03/01/2015] [Indexed: 06/04/2023]
Abstract
Binary and ternary water soluble copper(II) complexes - [Cu(nphen)2(H2O)](NO3)2·H2O (1), [Cu(phen)2(H2O)](NO3)2 (2), [Cu(nphen)(l-tyr)(H2O)]NO3·2H2O (3), [Cu(phen)(tyr)(H2O)] NO3·2H2O (4) - and diquarternary salts of nphen and phen (nphen=5-nitro-1,10-phenanthroline, phen=1,10-phenanthroline and tyr=l-tyrosine) have been synthesized and characterized by CHN analysis, (1)H NMR, (13)C NMR and IR spectroscopy, thermal analysis and single crystal X-ray diffraction techniques. The CT-DNA binding properties of these compounds have been investigated by thermal denaturation measurements, absorption and emission spectroscopy. The supercoiled pUC19 plasmid DNA cleavage activity of these compounds has been explored by agarose gel electrophoresis. The cytotoxicity of these compounds against MCF-7, Caco-2, A549 cancer cells and BEAS-2B healthy cells was also studied by using XTT method. The complexes 1-4 exhibit significant high cytotoxicity with low IC50 values in compared with cisplatin. The effect of the substituents of phen and coordinated amino acid in the above complexes are presented and discussed.
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Affiliation(s)
- Duygu İnci
- Department of Chemistry, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey
| | - Rahmiye Aydın
- Department of Chemistry, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey.
| | - Özgür Vatan
- Department of Biology, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey
| | - Dilek Yılmaz
- Department of Biology, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey
| | - Hasene Mutlu Gençkal
- Department of Chemistry, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey
| | - Yunus Zorlu
- Department of Chemistry, Faculty of Science, Gebze Institute of Technology, 41400 Kocaeli, Turkey
| | - Tolga Cavaş
- Department of Biology, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey
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Wojciechowska A, Gągor A, Jezierska J, Duczmal M. Structural, spectroscopic and magnetic properties of a novel copper(ii)l-tyrosinato complex. RSC Adv 2014. [DOI: 10.1039/c4ra10717a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Anl-tyrosinato copper(ii) ion complex of formula [Cu(l-Tyr)2(H2O)]·H2O (1) (l-Tyr =l-tyrosine) was characterized by X-ray and spectroscopic (FT-IR, FT-Raman, NIR-vis-UV, and EPR) and magnetic methods.
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Affiliation(s)
| | - Anna Gągor
- Institute of Low Temperature and Structure Research Polish Academy of Sciences
- 50-422 Wrocław, Poland
| | - Julia Jezierska
- Faculty of Chemistry
- University of Wrocław
- 50-383 Wrocław, Poland
| | - Marek Duczmal
- Faculty of Chemistry
- Wrocław University of Technology
- 50-370 Wrocław, Poland
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Wojciechowska A, Gągor A, Duczmal M, Staszak Z, Ozarowski A. l-Tyrosinatonickel(II) Complex: Synthesis and Structural, Spectroscopic, Magnetic, and Biological Properties of 2{[Ni(l-Tyr)2(bpy)]}·3H2O·CH3OH. Inorg Chem 2013; 52:4360-71. [DOI: 10.1021/ic3024919] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Anna Gągor
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422
Wrocław, Poland
| | | | | | - Andrzej Ozarowski
- National
High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United
States
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Fedoreyeva LI, Kireev II, Khavinson VK, Vanyushin BF. Penetration of short fluorescence-labeled peptides into the nucleus in HeLa cells and in vitro specific interaction of the peptides with deoxyribooligonucleotides and DNA. BIOCHEMISTRY (MOSCOW) 2012; 76:1210-9. [PMID: 22117547 DOI: 10.1134/s0006297911110022] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Marked fluorescence in cytoplasm, nucleus, and nucleolus was observed in HeLa cells after incubation with each of several fluorescein isothiocyanate-labeled peptides (epithalon, Ala-Glu-Asp-Gly; pinealon, Glu-Asp-Arg; testagen, Lys-Glu-Asp-Gly). This means that short biologically active peptides are able to penetrate into an animal cell and its nucleus and, in principle they may interact with various components of cytoplasm and nucleus including DNA and RNA. It was established that various initial (intact) peptides differently affect the fluorescence of the 5,6-carboxyfluorescein-labeled deoxyribooligonucleotides and DNA-ethidium bromide complexes. The Stern-Volmer constants characterizing the degree of fluorescence quenching of various single- and double-stranded fluorescence-labeled deoxyribooligonucleotides with short peptides used were different depending on the peptide primary structures. This indicates the specific interaction between short biologically active peptides and nucleic acid structures. On binding to them, the peptides discriminate between different nucleotide sequences and recognize even their cytosine methylation status. Judging from corresponding constants of the fluorescence quenching, the epithalon, pinealon, and bronchogen (Ala-Glu-Asp-Leu) bind preferentially with deoxyribooligonucleotides containing CNG sequence (CNG sites are targets for cytosine DNA methylation in eukaryotes). Epithalon, testagen, and pinealon seem to preferentially bind with CAG- but bronchogen with CTG-containing sequences. The site-specific interactions of peptides with DNA can control epigenetically the cell genetic functions, and they seem to play an important role in regulation of gene activity even at the earliest stages of life origin and in evolution.
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Affiliation(s)
- L I Fedoreyeva
- All Russia Research Institute of Agricultural Biotechnology, Russian Academy of Agricultural Sciences, Moscow, Russia
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Reddy PR, Shilpa A. Oxidative and hydrolytic DNA cleavage by Cu(II) complexes of salicylidene tyrosine schiff base and 1,10 phenanthroline/bipyridine. Polyhedron 2011. [DOI: 10.1016/j.poly.2010.11.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Synthesis, crystal structure and action on Escherichia coli by microcalorimetry of copper complexes with 1,10-phenanthroline and amino acid. J Inorg Biochem 2011; 105:23-30. [DOI: 10.1016/j.jinorgbio.2010.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Revised: 09/16/2010] [Accepted: 09/20/2010] [Indexed: 11/22/2022]
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