501
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Mononuclear Co(III) and Ni(II) Complexes with Polypyridyl Ligands, [Co(phen)2(taptp)]3+ and [Ni(phen)2(taptp)]2+: Synthesis, Photocleavage and DNA-binding. J Fluoresc 2012; 23:259-64. [DOI: 10.1007/s10895-012-1143-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Accepted: 10/23/2012] [Indexed: 10/27/2022]
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502
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Wang F, Xu J, Wu K, Weidt SK, Mackay CL, Langridge-Smith PRR, Sadler PJ. Competition between glutathione and DNA oligonucleotides for ruthenium(II) arene anticancer complexes. Dalton Trans 2012; 42:3188-95. [PMID: 23076358 DOI: 10.1039/c2dt32091f] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The organometallic anticancer complex [(η(6)-bip)Ru(en)Cl](+) (1; bip = biphenyl, en = ethylenediamine) selectively binds to N7 of guanine bases of oligonucleotides and native DNA. However, under physiologically relevant conditions (micromolar Ru concentrations, pH 7, 22 mM NaCl, 310 K), the tripeptide glutathione (γ-L-Glu-L-Cys-Gly; GSH) is kinetically competitive with guanine (as guanosine 3',5'-cyclic monophosphate, cGMP) for coordination with complex 1, and gives rise to a ruthenium thiolato adduct. This thiolato adduct can subsequently undergo oxidation to a sulfenate intermediate, providing a facile route for the formation of a final cGMP adduct via the displacement of S-bound glutathione by G N7 (F. Y. Wang, J. J. Xu, A. Habtemariam, J. Bella and P. J. Sadler, J. Am. Chem. Soc., 2005, 127, 17734). In this work, the competition between GSH and the single-stranded 14-mer oligonucleotide 5'-TATGTACCATGTAT-3' (I) and duplex III (III = I + II, II = 5'-ATACATGGTACATA) for complex 1 and its analogue [(η(6)-tha)Ru(en)Cl](+) (2, tha = tetrahydroanthracene) under physiologically relevant conditions was investigated using conventional ESI-MS and high resolution ESI-FTICR-MS coupled to conventional HPLC and nanoscale HPLC, respectively. The results indicate that whether there was high excess of GSH or not in the reaction mixtures, the reaction of complex 1 or 2 with single-stranded oligonucleotide I always gave rise to mono-ruthenated oligonucleotide, and the reaction of complex 1 or 2 with duplex III gave rise to the mono-ruthenated duplex oligonucleotide. Furthermore, the ruthenation of duplex III by complex 1 showed no significant discrimination between the complementary strands I and II, but complex 2 appeared to bind preferentially to strand II compared to strand I as revealed by the high resolution FTICR-MS analysis. GSH is highly abundant in cells at millimolar concentrations and is well known to be involved in the deactivation of the clinical drug cisplatin and in platinum resistance. Our findings reveal a potentially contrasting role for GSH in the mechanism of action of these ruthenium anticancer complexes that may contribute to the lack of cross-resistance with platinum drugs.
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Affiliation(s)
- Fuyi Wang
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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503
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Vajpayee V, Lee S, Kim SH, Kang SC, Cook TR, Kim H, Kim DW, Verma S, Lah MS, Kim IS, Wang M, Stang PJ, Chi KW. Self-assembled metalla-rectangles bearing azodipyridyl ligands: synthesis, characterization and antitumor activity. Dalton Trans 2012; 42:466-75. [PMID: 23073144 DOI: 10.1039/c2dt31014g] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Sixteen arene-Ru based molecular-rectangles were self-assembled in high yields by the equimolar mixing of arene-Ru acceptors (Aa-Ad) with various azopyridyl ligands (1,2-di(pyridyl-4yl)diazene (L1), 1,2-bis(pyridin-4-ylmethylene)hydrazine (L2), 1,2-bis(1-(pyridin-4-yl)ethylidene)hydrazine (L3), 1,2-bis(pyridin-4-ylmethylene)hydrazine (L4)) in nitromethane-methanol solutions. These new molecular-rectangles were fully characterized by a host of analytical techniques including elemental analysis, (1)H and (13)C NMR and HR-ESI-MS. The solid-state structures of two molecular-rectangles (1b and 4d) were determined by single crystal X-ray diffraction data. UV-visible and fluorescence studies were also carried out for the entire suite of rectangles. As with recent studies of similar arene-Ru complexes, the anti-proliferative activities of these complexes were evaluated against SK-hep-1 (liver cancer) and A-549 (lung cancer) human cancer lines. Additionally, the cellular pharmacology and intracellular localizations in AGS (gastric cancer) human cancer cells were determined for selected complexes (1c, 1d and 4c) by apoptosis and fluorescence microscopy studies. These studies confirm that arene-Ru molecular-rectangles inhibit cell cycle progression to the G0 phase, in contrast to that of cisplatin which arrests cell growth in the G2 phase.
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Affiliation(s)
- Vaishali Vajpayee
- Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea
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504
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Shi S, Lv C, Gao X, Zhao J, Yao J, Sun W, Huang H, Yao T, Ji L. [Ru(bpy)2(bppp)]2+ binds two different forms of the human telomeric G-quadruplex structure. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.07.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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505
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DNA Metalating-Intercalating Hybrid Agents for the Treatment of Chemoresistant Cancers. Chemistry 2012; 18:12926-34. [DOI: 10.1002/chem.201202050] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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506
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Shimazaki Y, Yamauchi O. Group-10 Metal Complexes of Biological Molecules and Related Ligands: Structural and Functional Properties. Chem Biodivers 2012; 9:1635-58. [DOI: 10.1002/cbdv.201100446] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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507
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Carreira M, Calvo-Sanjuán R, Sanaú M, Marzo I, Contel M. Organometallic Palladium Complexes with a Water-Soluble Iminophosphorane Ligand as Potential Anticancer Agents. Organometallics 2012; 31:5772-5781. [PMID: 23066172 PMCID: PMC3466594 DOI: 10.1021/om3006239] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The synthesis and characterization of a new water-soluble iminophosphorane ligand TPA=N-C(O)-2BrC(6)H(4) (C,N-IM; TPA = 1,3,5-triaza-7-phosphaadamantane) 1 is reported. Oxidative addition of 1 to Pd(2)(dba)(3) affords the orthopalladated dimer [Pd(μ-Br){C(6)H(4)(C(O)N=TPA-kC,N)-2}](2) (2) as a mixture of cis and trans isomers (1:1 molar ratio) where the iminophosphorane moeity behaves as a C,N-pincer ligand. By addition of different neutral or monoanionic ligands to 2, the bridging bromide can be cleaved and a variety of hydrophilic or water-soluble mononuclear organometallic palladium(II) complexes of the type [Pd{C(6)H(4)(C(O)N=TPA-kC,N)-2}(L-L)] (L-L = acac (3); S(2)CNMe(2) (4); 4,7-Diphenyl-1,10-phenanthrolinedisulfonic acid disodium salt C(12)H(6)N(2)(C(6)H(4)SO(3)Na)(2) (5)); [Pd{C(6)H(4)(C(O)N=TPA-kC,N)-2}(L)Br] (L = P(mC(6)H(4)SO(3)Na)(3) (6); P(3-Pyridyl)(3) (7)) and, [Pd(C(6)H(4)(C(O)N=TPA)-2}(TPA)(2)Br] (8) are obtained as single isomers. All new complexes were tested as potential anticancer agents and their cytotoxicity properties were evaluated in vitro against human Jurkat-T acute lymphoblastic leukemia cells, normal T-lymphocytes (PBMC) and DU-145 human prostate cancer cells. Compounds [Pd(μ-Br){C(6)H(4)(C(O)N=TPA-kC,N)-2}](2) (2) and [Pd{C(6)H(4)(C(O)N=TPA-kC,N)-2}(acac)] 3 (which has been crystallographically characterized) display the higher cytotoxicity against the above mentioned cancer cell lines while being less toxic to normal T-lymphocytes (peripheral blood mononuclear cells: PBMC). In addition, 3 is very toxic to cisplatin resistant Jurkat shBak indicating a cell death pathway that may be different to that of cisplatin. The interaction of 2 and 3 with plasmid (pBR322) DNA is much weaker than that of cisplatin pointing to an alternative biomolecular target for these cytotoxic compounds. All the compounds show an interaction with human serum albumin (HSA) faster than that of cisplatin.
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Affiliation(s)
- Monica Carreira
- Department of Chemistry, Brooklyn College and The Graduate Center, The City University of New York, Brooklyn, NY, 11210, US
| | - Rubén Calvo-Sanjuán
- Department of Biochemistry and Molecular and Cellular Biology, University of Zaragoza, 50009, Spain
| | - Mercedes Sanaú
- Departamento de Química Inorgánica, Universidad de Valencia, Burjassot, Valencia, 46100, Spain
| | - Isabel Marzo
- Department of Biochemistry and Molecular and Cellular Biology, University of Zaragoza, 50009, Spain
| | - María Contel
- Department of Chemistry, Brooklyn College and The Graduate Center, The City University of New York, Brooklyn, NY, 11210, US
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508
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Blanck S, Geisselbrecht Y, Kräling K, Middel S, Mietke T, Harms K, Essen LO, Meggers E. Bioactive cyclometalated phthalimides: design, synthesis and kinase inhibition. Dalton Trans 2012; 41:9337-48. [PMID: 22733119 PMCID: PMC4092256 DOI: 10.1039/c2dt30940h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The regioselective cyclometalation of 4-(pyridin-2-yl)phthalimide was exploited for the economical design of organometallic protein kinase inhibitors. 4-(Pyridin-2-yl)phthalimide can be prepared from inexpensive 4-bromophthalimide in just three steps including one Pd-catalyzed Stille cross-coupling. The versatility of this new ligand was demonstrated with the synthesis of ruthenium(II) half-sandwich as well as octahedral ruthenium(II) and iridium(III) complexes. The regioselectivity of the C-H activation in the course of the cyclometalation can be influenced by the reaction conditions and the steric demand of the introduced metal complex fragment. The biological activity of this new class of metalated phthalimides was evaluated by profiling two representative members against a large panel of human protein kinases. A cocrystal structure of one metallo-phthalimide with the protein kinase Pim1 confirmed an ATP-competitive binding with the intended hydrogen bonding between the phthalimide moiety and the hinge region of the ATP-binding site.
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Affiliation(s)
- Sebastian Blanck
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
| | - Yann Geisselbrecht
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
| | - Katja Kräling
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
| | - Stephen Middel
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
| | - Thomas Mietke
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
| | - Lars-Oliver Essen
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany
- Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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509
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Mitra R, Das S, Shinde S, Sinha S, Somasundaram K, Samuelson AG. Anticancer Activity of Hydrogen-Bond-Stabilized Half-Sandwich RuIIComplexes with Heterocycles. Chemistry 2012; 18:12278-91. [DOI: 10.1002/chem.201200938] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Indexed: 12/24/2022]
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510
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Abdi K, Hadadzadeh H, Salimi M, Simpson J, Khalaji AD. A mononuclear copper(II) complex based on the polypyridyl ligand 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz), [Cu(tptz)2]2+: X-ray crystal structure, DNA binding and in vitro cell cytotoxicity. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.06.089] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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511
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512
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Liu XW, Chen YD, Li L. Synthesis, DNA-binding, and photocleavage properties of Ru(II) complexes containing dppz-based ligand. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.710749] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Xue-Wen Liu
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
- b Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education , Xiangtan University , Xiangtan 411105 , P.R. China
| | - Yuan-Dao Chen
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
- b Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education , Xiangtan University , Xiangtan 411105 , P.R. China
| | - Lin Li
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
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513
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Manikandamathavan VM, Rajapandian V, Freddy AJ, Weyhermüller T, Subramanian V, Nair BU. Effect of coordinated ligands on antiproliferative activity and DNA cleavage property of three mononuclear Cu(II)-terpyridine complexes. Eur J Med Chem 2012; 57:449-58. [PMID: 22846797 DOI: 10.1016/j.ejmech.2012.06.039] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/15/2012] [Accepted: 06/20/2012] [Indexed: 01/18/2023]
Abstract
Three mononuclear copper(II) complexes, [Cu(tpy)Cl(2)] 1, [Cu(tpy)(NO(3))(2)(H(2)O)] 2 and [Cu(Ptpy)Cl(2)]·H(2)O·HCl 3 have been synthesised and characterized by various spectroscopic techniques and single crystal X-ray diffraction. Complexes 1 and 3 have five coordinate geometry in solid state, whereas complex 2 has six coordinate geometry. Mass spectral and EPR evidence suggest that in solution all the three complexes exist predominantly as a four coordinate species. Molecular modelling and DNA cleavage studies indicate that complexes 1 and 2 are DNA minor groove binders, whereas 3 is an intercalator. All the three complexes show nuclease activity in the presence of hydrogen peroxide. The three complexes have been found to be cytotoxic towards A549 lung adenocarcinoma cells.
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Affiliation(s)
- Verasuntharam M Manikandamathavan
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Adyar, Chennai 600 020, India
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514
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Leung CH, Zhong HJ, Yang H, Cheng Z, Chan DSH, Ma VPY, Abagyan R, Wong CY, Ma DL. A metal-based inhibitor of tumor necrosis factor-α. Angew Chem Int Ed Engl 2012; 51:9010-4. [PMID: 22807261 DOI: 10.1002/anie.201202937] [Citation(s) in RCA: 144] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 06/08/2012] [Indexed: 01/01/2023]
Abstract
Staying in the pocket: A cyclometalated iridium(III) biquinoline complex targets the protein-protein interface (see picture; C yellow, N blue, Ir dark green) of the tumor necrosis factor-α (TNF-α) trimer. Molecular-modeling studies confirm the nature of this interaction. Both enantiomers of the iridium complex display comparable in vitro potency to the strongest small-molecule inhibitor of TNF-α.
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Affiliation(s)
- Chung-Hang Leung
- Institute of Chinese Medical Sciences and State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao, SAR China.
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515
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Leung CH, Zhong HJ, Yang H, Cheng Z, Chan DSH, Ma VPY, Abagyan R, Wong CY, Ma DL. A Metal-Based Inhibitor of Tumor Necrosis Factor-α. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202937] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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516
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Cytotoxic hydrophilic iminophosphorane coordination compounds of d⁸ metals. Studies of their interactions with DNA and HSA. J Inorg Biochem 2012; 116:204-14. [PMID: 23063789 DOI: 10.1016/j.jinorgbio.2012.06.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 06/29/2012] [Accepted: 06/30/2012] [Indexed: 01/05/2023]
Abstract
The synthesis and characterization of a new water-soluble N,N-chelating iminophosphorane ligand TPAN-C(O)-2-NC(5)H(4) (N,N-IM) (1) and its d(8) (Au(III), Pd(II) and Pt(II)) coordination complexes are reported. The structures of cationic [AuCl(2)(N,N-IM)]ClO(4) (2) and neutral [MCl(2)(N,N-IM)] M=Pd (3), Pt(4) complexes were determined by X-ray diffraction studies or by means of density-functional calculations. While the Pd and Pt compounds are stable in mixtures of DMSO/H(2)O over 4 days, the gold derivative (2) decomposes quickly to TPAO and previously reported neutral gold(III) compound [AuCl(2)(N,N-H)] 5 (containing the chelating N,N-fragment HN-C(O)-2-NC(5)H(4)). The cytotoxicities of complexes 2-5 were evaluated in vitro against human Jurkat-T acute lymphoblastic leukemia cells and DU-145 human prostate cancer cells. Pt (4) and Au compounds (2 and 5) are more cytotoxic than cisplatin to these cell lines and to cisplatin-resistant Jurkat sh-Bak cell lines and their cell death mechanism is different from that of cisplatin. All the compounds show higher toxicity against leukemia cells when compared to normal human T-lymphocytes (PBMC). The interaction of the Pd and Pt compounds with calf thymus and plasmid (pBR322) DNA is different from that of cisplatin. All compounds bind to human serum albumin (HSA) faster than cisplatin (measured by fluorescence spectroscopy). Weak and stronger binding interactions were found for the Pd (3) and Pt (4) derivatives by isothermal titration calorimetry. Importantly, for the Pt (4) compounds the binding to HSA was reversed by addition of a chelating agent (citric acid) and by a decrease in pH.
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517
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A mononuclear Mn2+ complex based on a novel tris-(ethyl acetate) pendant-armed tetraazamacrocycle: Effect of pyridine on self-assembly and weak interactions. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.03.042] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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518
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Niyazi H, Hall JP, O'Sullivan K, Winter G, Sorensen T, Kelly JM, Cardin CJ. Crystal structures of Λ-[Ru(phen)₂dppz]²⁺ with oligonucleotides containing TA/TA and AT/AT steps show two intercalation modes. Nat Chem 2012; 4:621-8. [PMID: 22824893 DOI: 10.1038/nchem.1397] [Citation(s) in RCA: 174] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 05/30/2012] [Indexed: 12/22/2022]
Abstract
The ruthenium complex [Ru(phen)(2)(dppz)](2+) (where phen is phenanthroline and dppz dipyridophenazine is known as a 'light switch' complex because its luminescence in solution is significantly enhanced in the presence of DNA. This property is poised to serve in diagnostic and therapeutic applications, but its binding mode with DNA needs to be elucidated further. Here, we describe the crystal structures of the Λ enantiomer bound to two oligonucleotide duplexes. The dppz ligand intercalates symmetrically and perpendicularly from the minor groove of the d(CCGGTACCGG)(2) duplex at the central TA/TA step, but not at the central AT/AT step of d(CCGGATCCGG)(2). In both structures, however, a second ruthenium complex links the duplexes through the combination of a shallower angled intercalation into the C(1)C(2)/G(9)G(10) step at the end of the duplex, and semi-intercalation into the G(3)G(4) step of an adjacent duplex. The TA/TA specificity of the perpendicular intercalation arises from the packing of phenanthroline ligands against the adenosine residue.
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Affiliation(s)
- Hakan Niyazi
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK
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519
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Zhao C, Ren J, Gregoliński J, Lisowski J, Qu X. Contrasting enantioselective DNA preference: chiral helical macrocyclic lanthanide complex binding to DNA. Nucleic Acids Res 2012; 40:8186-96. [PMID: 22675072 PMCID: PMC3439914 DOI: 10.1093/nar/gks524] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
There is great interest in design and synthesis of small molecules which selectively target specific genes to inhibit biological functions in which particular DNA structures participate. Among these studies, chiral recognition has been received much attention because more evidences have shown that conversions of the chirality and diverse conformations of DNA are involved in a series of important life events. Here, we report that a pair of chiral helical macrocyclic lanthanide (III) complexes, (M)-Yb[LSSSSSS]3+ and (P)-Yb[LRRRRRR]3+, can enantioselectively bind to B-form DNA and show remarkably contrasting effects on GC-rich and AT-rich DNA. Neither of them can influence non-B-form DNA, nor quadruplex DNA stability. Our results clearly show that P-enantiomer stabilizes both poly(dG-dC)2 and poly(dA-dT)2 while M-enantiomer stabilizes poly(dA-dT)2, however, destabilizes poly(dG-dC)2. To our knowledge, this is the best example of chiral metal compounds with such contrasting preference on GC- and AT-DNA. Ligand selectively stabilizing or destabilizing DNA can interfere with protein–DNA interactions and potentially affect many crucial biological processes, such as DNA replication, transcription and repair. As such, bearing these unique capabilities, the chiral compounds reported here may shed light on the design of novel enantiomers targeting specific DNA with both sequence and conformation preference.
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Affiliation(s)
- Chuanqi Zhao
- Division of Biological Inorganic Chemistry, State Key laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Graduate School of Chinese Academy of Sciences, Changchun, Jilin 130022, China
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520
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Inclán M, Albelda MT, Frías JC, Blasco S, Verdejo B, Serena C, Salat-Canela C, Díaz ML, García-España A, García-España E. Modulation of DNA binding by reversible metal-controlled molecular reorganizations of scorpiand-like ligands. J Am Chem Soc 2012; 134:9644-56. [PMID: 22594493 DOI: 10.1021/ja300538s] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
DNA interaction with scorpiand azamacrocycles has been achieved through modulation of their binding affinities. Studies performed with different experimental techniques provided evidence that pH or metal-driven molecular reorganizations of these ligands regulate their ability to interact with calf thymus DNA (ctDNA) through an intercalative mode. Interestingly enough, metal-driven molecular reorganizations serve to increase or decrease the biological activities of these compounds significantly.
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Affiliation(s)
- Mario Inclán
- Instituto de Ciencia Molecular, Departamento de Química Inorgánica, Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
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521
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Malinovskii VL, Nussbaumer AL, Häner R. Oligopyrenotides: chiral nanoscale templates for chromophore assembly. Angew Chem Int Ed Engl 2012; 51:4905-8. [PMID: 22492542 DOI: 10.1002/anie.201201352] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Indexed: 01/29/2023]
Abstract
Getting organized: DNA-like supramolecular polymers formed of short oligopyrenotides serve as a helical scaffold for the molecular assembly of ligands. The cationic porphyrin meso-tetrakis(1-methylpyridin-4-yl)porphyrin interacts with the helical polymers in a similar way as with poly(dA:dT).
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522
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Malinovskii VL, Nussbaumer AL, Häner R. Oligopyrenotides: Chiral Nanoscale Templates for Chromophore Assembly. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201352] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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523
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Paul H, Mukherjee T, Drew M, Chattopadhyay P. Synthesis, characterization, crystal structure, and DNA-binding of ruthenium(II) complexes of heterocyclic nitrogen ligands resulting from a benzimidazole-based quinazoline derivative. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.667807] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- H. Paul
- a Department of Chemistry , Burdwan University , Golapbag , Burdwan-713104 , India
| | - T. Mukherjee
- a Department of Chemistry , Burdwan University , Golapbag , Burdwan-713104 , India
| | - M.G.B. Drew
- b Department of Chemistry , Reading University , Reading RG6 6AD , Berks , England
| | - P. Chattopadhyay
- a Department of Chemistry , Burdwan University , Golapbag , Burdwan-713104 , India
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524
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Jara DH, Lemus L, Farías L, Freire E, Baggio R, Guerrero J. Spectroscopic Evidence in Solid and Solution of a Discrete Copper(I) Tetrahedral Complex Dimer Supported by Supramolecular Interactions. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101356] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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525
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Geldmacher Y, Splith K, Kitanovic I, Alborzinia H, Can S, Rubbiani R, Nazif MA, Wefelmeier P, Prokop A, Ott I, Wölfl S, Neundorf I, Sheldrick WS. Cellular impact and selectivity of half-sandwich organorhodium(III) anticancer complexes and their organoiridium(III) and trichloridorhodium(III) counterparts. J Biol Inorg Chem 2012; 17:631-46. [DOI: 10.1007/s00775-012-0883-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Accepted: 02/03/2012] [Indexed: 01/09/2023]
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526
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Li XL, Hu YJ, Wang H, Yu BQ, Yue HL. Molecular spectroscopy evidence of berberine binding to DNA: comparative binding and thermodynamic profile of intercalation. Biomacromolecules 2012; 13:873-80. [PMID: 22316074 DOI: 10.1021/bm2017959] [Citation(s) in RCA: 202] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Berberine (BH) is an important traditional medicinal herb endowed with diverse pharmacological and biological activities. In this work, the binding characteristics and molecular mechanism of the interaction between the BH and herring sperm DNA were explored by UV-vis absorbance and fluorescence spectroscopy. In the mechanism discussion, fluorescence quenching, absorption spectra, competition experiment, and iodide quenching experiment studies hinted at an intercalative mode of binding for BH to DNA. Fluorescence studies revealed the binding constant (K) of BH-DNA was ∼10(4) L·mol(-1). The effects of temperature, chemical denaturants, thermal denaturation, and pH were studied to show the factors of the interaction and provided further support for the intercalative binding mode. The results of thermodynamic parameters ΔG, ΔH, and ΔS at different temperatures indicated that the hydrogen bonds and van der Waals interactions played major roles in the reaction, and the effect of ionic strength indicated that electrostatic attraction between the BH and DNA was also a component of the interaction.
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Affiliation(s)
- Xiao-Ling Li
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, PR China
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527
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Chen ZF, Shi YF, Liu YC, Hong X, Geng B, Peng Y, Liang H. TCM Active Ingredient Oxoglaucine Metal Complexes: Crystal Structure, Cytotoxicity, and Interaction with DNA. Inorg Chem 2012; 51:1998-2009. [DOI: 10.1021/ic200443p] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Zhen-Feng Chen
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
| | - Yan-Fang Shi
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
| | - Yan-Cheng Liu
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
| | - Xue Hong
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
| | - Bo Geng
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
| | - Yan Peng
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
| | - Hong Liang
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
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528
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Liu XW, Chen YD, Li L, Lu JL, Zhang DS. DNA-binding and photocleavage studies of ruthenium(II) complexes containing asymmetric intercalative ligand. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 86:554-561. [PMID: 22137749 DOI: 10.1016/j.saa.2011.11.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 11/01/2011] [Accepted: 11/09/2011] [Indexed: 05/31/2023]
Abstract
A novel asymmetric ligand 2-(pyridine-2-yl)-1-H-imidazo[4,5-i]dibenzo[2,3-a:2',3'-c]phenazine (pidbp) and its ruthenium complexes [Ru(L)(2)(pidbp)](2+) (L=bpy (2, 2'- bipyridine), phen (1, 10 - phenanthroline)), have been synthesized and characterized by elemental analysis, ES-MS, (1)H NMR. Various methods support the conclusion that both Ru(II) complexes can intercalate into DNA base pairs. Complex [Ru(bpy)(2)(pidbp)](2+)4 exhibits its DNA "molecular light switch" properties. Furthermore, the two complexes are efficient DNA-photocleavers under irradiation at 365 nm, and complex 5 exhibits a stronger DNA-photocleavage efficiency than complex 4. The mechanism of DNA cleavage is an oxidative process by generating singlet oxygen.
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Affiliation(s)
- Xue-Wen Liu
- College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, ChangDe 415000, PR China.
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529
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Oh JH, Han SH, Park HG, Lee JS. Room-Temperature Colorimetric Detection of Coralyne Using DNA-Functionalized Nanoparticle Probes. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.1.329] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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530
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Study on specific interaction of new ferrocene-substituted carborane conjugates with hemoglobin protein. Sci China Chem 2012. [DOI: 10.1007/s11426-011-4490-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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531
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532
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Fu Y, Romero MJ, Habtemariam A, Snowden ME, Song L, Clarkson GJ, Qamar B, Pizarro AM, Unwin PR, Sadler PJ. The contrasting chemical reactivity of potent isoelectronic iminopyridine and azopyridine osmium(ii) arene anticancer complexes. Chem Sci 2012. [DOI: 10.1039/c2sc20220d] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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533
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Terenzi A, Fanelli M, Ambrosi G, Amatori S, Fusi V, Giorgi L, Turco Liveri V, Barone G. DNA binding and antiproliferative activity toward human carcinoma cells of copper(ii) and zinc(ii) complexes of a 2,5-diphenyl[1,3,4]oxadiazole derivative. Dalton Trans 2012; 41:4389-95. [PMID: 22333893 DOI: 10.1039/c2dt11759b] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Alessio Terenzi
- Dipartimento di Chimica S. Cannizzaro, Università degli Studi di Palermo, Viale delle Scienze, Parco d'Orleans II, Edificio 17, 90128 Palermo, Italy
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534
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535
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Xiang Y, Fu C, Breiding T, Sasmal PK, Liu H, Shen Q, Harms K, Zhang L, Meggers E. Hydrolytically stable octahedral silicon complexes as bioactive scaffolds: application to the design of DNA intercalators. Chem Commun (Camb) 2012; 48:7131-3. [DOI: 10.1039/c2cc32506c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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536
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Noffke AL, Habtemariam A, Pizarro AM, Sadler PJ. Designing organometallic compounds for catalysis and therapy. Chem Commun (Camb) 2012; 48:5219-46. [DOI: 10.1039/c2cc30678f] [Citation(s) in RCA: 311] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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537
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Park S, Ikehata K, Watabe R, Hidaka Y, Rajendran A, Sugiyama H. Deciphering DNA-based asymmetric catalysis through intramolecular Friedel–Crafts alkylations. Chem Commun (Camb) 2012; 48:10398-400. [DOI: 10.1039/c2cc35625b] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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538
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Wang H, Yonker NJD, Gao H, Tan C, Zhang X, Ji L, Zhao C, Mao ZW. Aquation and dimerization of osmium(ii) anticancer complexes: a density functional theory study. RSC Adv 2012. [DOI: 10.1039/c1ra00604e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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539
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Kilah NL, Meggers E. Sixty Years Young: The Diverse Biological Activities of Metal Polypyridyl Complexes Pioneered by Francis P. Dwyer. Aust J Chem 2012. [DOI: 10.1071/ch12275] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Sixty years ago, the Australian chemist Francis P. Dwyer pioneered the use of ruthenium polypyridyl complexes as biologically active compounds. These chemically inert and configurationally stable complexes revealed an astonishing range of interesting biological activities, such as the inhibition of the enzyme acetylcholinesterase, anti-cancer activity in vivo, and bacteriostatic/bacteriocidal action. This review commemorates the sixtieth anniversary of Dwyer and co-workers’ landmark 1952 publication, summarises their broader achievements in biological inorganic chemistry, and discusses the contribution of this work to the development of modern biological and medicinal inorganic chemistry.
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540
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Wang H, Yonker NJD, Gao H, Phillips DL, Zhao C, Ji L, Mao ZW. Predicting the interactions of organometallic ruthenium ethylenediamine complexes with mononucleotides: insights from density functional theory. RSC Adv 2012. [DOI: 10.1039/c2ra20984e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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541
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García-Ramos JC, Toledano-Magaña Y, Talavera-Contreras LG, Flores-Álamo M, Ramírez-Delgado V, Morales-León E, Ortiz-Frade L, Gutiérrez AG, Vázquez-Aguirre A, Mejía C, Carrero JC, Laclette JP, Moreno-Esparza R, Ruiz-Azuara L. Potential cytotoxic and amoebicide activity of first row transition metal compounds with 2,9-bis-(2′,5′-diazahexanyl)-1,1-phenanthroline (L1). Dalton Trans 2012; 41:10164-74. [DOI: 10.1039/c2dt30224a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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542
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Ruiz J, Rodríguez V, Cutillas N, Samper KG, Capdevila M, Palacios Ò, Espinosa A. Novel C,N-chelate rhodium(iii) and iridium(iii) antitumor complexes incorporating a lipophilic steroidal conjugate and their interaction with DNA. Dalton Trans 2012; 41:12847-56. [DOI: 10.1039/c2dt31654d] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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543
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Mononuclear copper(II) complex with terpyridine and an extended phenanthroline base, [Cu(tpy)(dppz)]2+: Synthesis, crystal structure, DNA binding and cytotoxicity activity. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.10.028] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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544
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Lo KKW, Choi AWT, Law WHT. Applications of luminescent inorganic and organometallic transition metal complexes as biomolecular and cellular probes. Dalton Trans 2012; 41:6021-47. [DOI: 10.1039/c2dt11892k] [Citation(s) in RCA: 321] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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545
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Liu XW, Li L, Lu JL, Chen YD, Zhang DS. Synthesis, DNA-binding, and photocleavage studies of ruthenium(II) complexes with an asymmetric ligand. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.639364] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Xue-Wen Liu
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
- b Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University , Xiangtan 411105 , P.R. China
| | - Lin Li
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
| | - Ji-Lin Lu
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
| | - Yuan-Dao Chen
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
- b Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University , Xiangtan 411105 , P.R. China
| | - Da-Shun Zhang
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
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546
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González-Pantoja JF, Stern M, Jarzecki AA, Royo E, Robles-Escajeda E, Varela-Ramírez A, Aguilera RJ, Contel M. Titanocene-phosphine derivatives as precursors to cytotoxic heterometallic TiAu2 and TiM (M = Pd, Pt) compounds. Studies of their interactions with DNA. Inorg Chem 2011; 50:11099-110. [PMID: 21958150 PMCID: PMC3205237 DOI: 10.1021/ic201647h] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A series of tri- and bimetallic titanium-gold, titanium-palladium, and titanium-platinum derivatives of the general formulas [Ti{η(5)-C(5)H(4)(CH(2))(n)PPh(2)(AuCl)}(2)]·2THF [n = 0 (1); n = 2 (2); n = 3 (3)] and [TiCl(2){η(5)-C(5)H(4)κ-(CH(2))(n)PPh(2)}(2)(MCl(2))]·2THF [M = Pd, n = 0 (4); n = 2 (5); n = 3 (6) ; M = Pt, n = 0 (7); n = 2 (8); n = 3 (9)] have been synthesized and characterized by different spectroscopic techniques and mass spectrometry. The molecular structures of compounds 1-9 have been investigated by means of density functional theory calculations. The calculated IR spectra of the optimized structures fit well with the experimental IR data obtained for 1-9. The stability of the heterometallic compounds in deuterated solvents [CDCl(3), dimethyl sulfoxide (DMSO)-d(6), and mixtures 50:50 DMSO-d(6)/D(2)O and 1:99 DMSO-d(6)/D(2)O at acidic and neutral pH] has been evaluated by (31)P and (1)H NMR spectroscopy showing a higher stability for these compounds than for Cp(2)TiCl(2) or precursors [Ti{η(5)-C(5)H(4)(CH(2))(n)PPh(2)}(2)]. The new compounds display a lower acidity (1-2 units) than Cp(2)TiCl(2). The decomposition products have been identified over time. Complexes 1-9 have been tested as potential anticancer agents, and their cytotoxicity properties were evaluated in vitro against HeLa human cervical carcinoma and DU-145 human prostate cancer cells. TiAu(2) and TiPd compounds were highly cytotoxic for these two cell lines. The interactions of the compounds with calf thymus DNA have been evaluated by thermal denaturation (1-9) and by circular dichroism (1, 3, 4, and 7) spectroscopic methods. All of these complexes show a stronger interaction with DNA than that displayed by Cp(2)TiCl(2) at neutral pH. The data are consistent with electrostatic interactions with DNA for TiAu(2) compounds and for a covalent binding mode for TiM (M = Pd, Pt) complexes.
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Affiliation(s)
- Jose F. González-Pantoja
- Department of Chemistry, Brooklyn College and The Graduate Center, The City University of New York, Brooklyn, NY, 11210, US
| | - Michael Stern
- Department of Chemistry, Brooklyn College and The Graduate Center, The City University of New York, Brooklyn, NY, 11210, US
| | - Andrzej A. Jarzecki
- Department of Chemistry, Brooklyn College and The Graduate Center, The City University of New York, Brooklyn, NY, 11210, US
| | - Eva Royo
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
| | - Elisa Robles-Escajeda
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, US
| | - Armando Varela-Ramírez
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, US
| | - Renato J. Aguilera
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, US
| | - María Contel
- Department of Chemistry, Brooklyn College and The Graduate Center, The City University of New York, Brooklyn, NY, 11210, US
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547
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McKinley AW, Lincoln P, Tuite EM. Environmental effects on the photophysics of transition metal complexes with dipyrido[2,3-a:3′,2′-c]phenazine (dppz) and related ligands. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2011.06.012] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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548
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Lo LTL, Chu WK, Tam CY, Yiu SM, Ko CC, Chiu SK. Aggregation and DNA Intercalation Properties of Di(isocyano) Rhodium(I) Diimine Complexes. Organometallics 2011. [DOI: 10.1021/om200723j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Larry Tso-Lun Lo
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong
Kong SAR, People's Republic of China
| | - Wing-Kin Chu
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong
Kong SAR, People's Republic of China
| | - Chun-Yat Tam
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong
Kong SAR, People's Republic of China
| | - Shek-Man Yiu
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong
Kong SAR, People's Republic of China
| | - Chi-Chiu Ko
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong
Kong SAR, People's Republic of China
| | - Sung-Kay Chiu
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong
Kong SAR, People's Republic of China
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549
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da Silveira VC, Benezra H, Luz JS, Georg RC, Oliveira CC, Ferreira AMDC. Binding of oxindole-Schiff base copper(II) complexes to DNA and its modulation by the ligand. J Inorg Biochem 2011; 105:1692-703. [PMID: 22099472 DOI: 10.1016/j.jinorgbio.2011.09.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 09/07/2011] [Accepted: 09/08/2011] [Indexed: 11/16/2022]
Abstract
Previous studies on copper(II) complexes with oxindole-Schiff base ligands have shown their potential antitumor activity towards different cells, inducing apoptosis through a preferential attack to DNA and/or mitochondria. Herein, we better characterize the interactions between some of these copper(II) complexes and DNA. Investigations on its binding ability to DNA were carried out by fluorescence measurements in competitive experiments with ethidium bromide, using plasmidial or calf-thymus DNA. These results indicated an efficient binding process similar to that observed with copper(II)-phenanthroline species, [Cu(o-phen)(2)](2+), with binding constants in the range 3 to 9×10(2) M(-1). DNA cleavage experiments in the presence and absence of distamycin, a recognized binder of DNA, indicated that this binding probably occurs at major or minor groove, leading to double-strand DNA cleavage, and being modulated by the imine ligand. Corroborating these data, discrete changes in EPR spectra of the studied complexes were observed in the presence of DNA, while more remarkable changes were observed in the presence of nucleotides (AMP, GMP, CMP or UMP). Additional evidence for preferential coordination of the copper centers to the bases guanine or cytosine was obtained from titrations of these complexes with each nucleotide, monitored by absorption spectral changes. Therefore, the obtained data point out to their action as groove binders to DNA bases, rather than as intercalators or covalent cross-linkers. Further investigations by SDS PAGE using (32)P-ATP or (32)P-oligonucleotides attested that no hydrolysis of phosphate linkage in DNA or RNA occurs, in the presence of such complexes, confirming their main oxidative mechanism of action.
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Affiliation(s)
- Vivian Chagas da Silveira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
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550
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Mariappan M, Suenaga M, Mukhopadhyay A, Raghavaiah P, Maiya BG. Synthesis, structure, DNA binding and photocleavage activity of a ruthenium(II) complex with 11-(9-acridinyl)dipyrido[3,2-a:2′,3′-c]phenazine ligand. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.06.042] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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