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Mohapatra D, Patra SA, Pattanayak PD, Sahu G, Sasamori T, Dinda R. Monomeric copper(II) complexes with unsymmetrical salen environment: Synthesis, characterization and study of biological activities. J Inorg Biochem 2024; 253:112497. [PMID: 38290220 DOI: 10.1016/j.jinorgbio.2024.112497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 02/01/2024]
Abstract
Three new ONNO-donor tetradentate unsymmetrical salen ligands were synthesized by using o-phenyl diamine with substituted salicylaldehydes followed by a two-step reaction methodology. These three ligands by reaction with Cu(OAc)2.4H2O produced three new monomeric Cu(II) complexes, [CuII(L1-3)] (1-3). Elemental analysis, IR, UV-vis, NMR, and HR-ESI-MS techniques were used to analyze and characterize all the synthesized ligands and their corresponding metal complexes. Molecular structures of 1-3 were confirmed by the single-crystal-XRD analysis. Furthermore, the DNA binding ability of these complexes was checked through UV-vis, fluorescence spectroscopy, and also by circular dichroism studies. All the complexes were found to show an intercalation mode of binding with the Kb value in the range of 104-105 M-1. Finally, 1-3 was tested against two malignant (HeLa and A549) and non-cancerous (NIH-3T3) cell lines to check their in vitro antiproliferative activities. Among all, 1 is the most cytotoxic of the series having IC50 values of 5.7 ± 0.9 and 6.0 ± 0.3 μM against HeLa and A549 cell lines, respectively. This result is also consistent with the DNA binding order. Furthermore, the apoptotic mode of cell death of all the complexes was also evaluated by DAPI, AO/EB, and Annexin V-FITC/PI double staining assays.
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Affiliation(s)
- Deepika Mohapatra
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Sushree Aradhana Patra
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | | | - Gurunath Sahu
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Takahiro Sasamori
- University of Tsukuba, Institute of Natural Sciences B-506, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Rupam Dinda
- Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India.
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2
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Christian JM, Zoepfl M, Johnson WE, Ginsburg E, Peterson EJ, Hampton JD, Farrell NP. Glycosaminoglycan-directed cobalt complexes. J Inorg Biochem 2023; 245:112254. [PMID: 37182504 DOI: 10.1016/j.jinorgbio.2023.112254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/20/2023] [Accepted: 05/08/2023] [Indexed: 05/16/2023]
Abstract
The biological activity of the 6+ Co containing Werner's Complex has been described and mechanistic considerations suggest that the highly anionic glycosaminoglycans (heparan sulfate, HS, GAGs) are implicated in this activity [Paiva et al. 2021]. To examine in detail the molecular basis of Werner's Complex biological properties we have examined a selection of simple mononuclear Co3+ compounds for their interactions with HS and Fondaparinux (FPX). FPX is a highly sulfated synthetic pentasaccharide used as a model HS substrate [Mangrum et al. 2014, Peterson et al. 2017]. The Co complexes were chosen to be formally substitution-inert and/or have the potential for covalent binding to the biomolecule. Using both indirect competitive inhibition assays and direct mass spectrometric assays, formally substitution-inert complexes bound to FPX with protection from multiple sulfate loss in the gas phase through metalloshielding. Covalent binding of Co-Cl complexes as in [CoCl(NH3)5]2+ and cis-[CoCl2(en)2]+ was confirmed by mass spectrometry. Interestingly, the former complex was shown to be an effective inhibitor of bacterial heparinase enzyme activity and to inhibit heparanase-dependent cellular invasion through the extracellular matrix (ECM). Pursuing the theme of metalloglycomics, we have observed the hitherto unappreciated biological activity of the simple [CoCl(NH3)5]2+ compound, a staple of most inorganic chemistry lab curricula.
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Affiliation(s)
- Jessica M Christian
- Department of Chemistry, Virginia Commonwealth University, 1001 W Main St, Richmond, VA 23284, United States of America
| | - Mary Zoepfl
- Department of Chemistry, Virginia Commonwealth University, 1001 W Main St, Richmond, VA 23284, United States of America
| | - Wyatt E Johnson
- Massey Cancer Center, Virginia Commonwealth University, 1300 E Marshall Street, Richmond, VA 23298-0037, United States of America
| | - Eric Ginsburg
- Department of Chemistry, Virginia Commonwealth University, 1001 W Main St, Richmond, VA 23284, United States of America
| | - Erica J Peterson
- Massey Cancer Center, Virginia Commonwealth University, 1300 E Marshall Street, Richmond, VA 23298-0037, United States of America
| | - J David Hampton
- Massey Cancer Center, Virginia Commonwealth University, 1300 E Marshall Street, Richmond, VA 23298-0037, United States of America
| | - Nicholas P Farrell
- Department of Chemistry, Virginia Commonwealth University, 1001 W Main St, Richmond, VA 23284, United States of America; Massey Cancer Center, Virginia Commonwealth University, 1300 E Marshall Street, Richmond, VA 23298-0037, United States of America.
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3
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Sahu G, Banerjee A, Samanta R, Mohanty M, Lima S, Tiekink ERT, Dinda R. Water-Soluble Dioxidovanadium(V) Complexes of Aroylhydrazones: DNA/BSA Interactions, Hydrophobicity, and Cell-Selective Anticancer Potential. Inorg Chem 2021; 60:15291-15309. [PMID: 34597028 DOI: 10.1021/acs.inorgchem.1c01899] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Five new anionic aqueous dioxidovanadium(V) complexes, [{VO2L1,2}A(H2O)n]α (1-5), with the aroylhydrazone ligands pyridine-4-carboxylic acid (3-ethoxy-2-hydroxybenzylidene)hydrazide (H2L1) and furan-2-carboxylic acid (3-ethoxy-2-hydroxybenzylidene)hydrazide (H2L2) incorporating different alkali metals (A = Na+, K+, Cs+) as countercation were synthesized and characterized by various physicochemical techniques. The solution-phase stabilities of 1-5 were determined by time-dependent NMR and UV-vis, and also the octanol/water partition coefficients were obtained by spectroscopic techniques. X-ray crystallography of 2-4 confirmed the presence of vanadium(V) centers coordinated by two cis-oxido-O atoms and the O, N, and O atoms of a dianionic tridentate ligand. To evaluate the biological behavior, all complexes were screened for their DNA/protein binding propensity through spectroscopic experiments. Finally, a cytotoxicity study of 1-5 was performed against colon (HT-29), breast (MCF-7), and cervical (HeLa) cancer cell lines and a noncancerous NIH-3T3 cell line. The cytotoxicity was cell-selective, being more active against HT-29 than against other cells. In addition, the role of hydrophobicity in the cytotoxicity was explained in that an optimal hydrophobicity is essential for high cytotoxicity. Moreover, the results of wound-healing assays indicated antimigration in case of HT-29 cells. Remarkably, 1 with an IC50 value of 5.42 ± 0.15 μM showed greater activity in comparison to cisplatin against the HT-29 cell line.
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Affiliation(s)
- Gurunath Sahu
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Atanu Banerjee
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Rajib Samanta
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Monalisa Mohanty
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Sudhir Lima
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
| | - Edward R T Tiekink
- Research Centre for Crystalline Materials, School of Medical and Life Sciences, 5 Jalan Universiti, Sunway University, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
| | - Rupam Dinda
- Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India
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4
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Research progress of azido-containing Pt(IV) antitumor compounds. Eur J Med Chem 2021; 227:113927. [PMID: 34695775 DOI: 10.1016/j.ejmech.2021.113927] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/10/2021] [Accepted: 10/13/2021] [Indexed: 12/11/2022]
Abstract
Cancer is a long-known incurable disease, and the medical use of cisplatin has been a significant discovery. However, the side-effects of cisplatin necessitate the development of new and improved drug. Therefore, in this study, we focused on the photoactivatable Pt(IV) compounds Pt[(X1)(X2)(Y1)(Y2)(N3)2], which have a completely novel mechanism of action. Pt(IV) can efficiently overcome the side-effects of cisplatin and other drugs. Here, we have demonstrated, summarized and discussed the effects and mechanism of these compounds. Compared to the relevant articles in the literature, we have provided a more detailed introduction and a made comprehensive classification of these compounds. We believe that our results can effectively provide a reference for the development of these drugs.
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5
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Paiva REF, Peterson EJ, Malina J, Zoepfl M, Hampton JD, Johnson WE, Graminha A, Ourahmane A, McVoy MA, Brabec V, Berners‐Price SJ, Farrell NP. On the Biology of Werner's Complex. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Raphael E. F. Paiva
- Institute for Glycomics Griffith University Gold Coast Campus Southport Qld. 4222 Australia
| | - Erica J. Peterson
- Department of Chemistry Virginia Commonwealth University Richmond VA 23284-2006 USA
- Massey Cancer Center Virginia Commonwealth University Richmond VA 23298-0037 USA
| | - Jaroslav Malina
- Institute of Biophysics Czech Academy of Sciences Kralovopolska 135 61265 Brno Czech Republic
| | - Mary Zoepfl
- Department of Chemistry Virginia Commonwealth University Richmond VA 23284-2006 USA
| | - J. David Hampton
- Massey Cancer Center Virginia Commonwealth University Richmond VA 23298-0037 USA
- Department of Biochemistry and Molecular Biology Virginia Commonwealth University Richmond Virginia 23298-0033 USA
| | - Wyatt E. Johnson
- Department of Chemistry Virginia Commonwealth University Richmond VA 23284-2006 USA
| | - Angelica Graminha
- Department of Chemistry Virginia Commonwealth University Richmond VA 23284-2006 USA
| | - Amine Ourahmane
- Department of Pediatrics Virginia Commonwealth University Richmond VA 23298-0163 USA
| | - Michael A. McVoy
- Department of Pediatrics Virginia Commonwealth University Richmond VA 23298-0163 USA
| | - Viktor Brabec
- Institute of Biophysics Czech Academy of Sciences Kralovopolska 135 61265 Brno Czech Republic
| | - Susan J. Berners‐Price
- Institute for Glycomics Griffith University Gold Coast Campus Southport Qld. 4222 Australia
| | - Nicholas P. Farrell
- Institute for Glycomics Griffith University Gold Coast Campus Southport Qld. 4222 Australia
- Department of Chemistry Virginia Commonwealth University Richmond VA 23284-2006 USA
- Massey Cancer Center Virginia Commonwealth University Richmond VA 23298-0037 USA
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de Paiva REF, Peterson EJ, Malina J, Zoepfl M, Hampton JD, Johnson WE, Graminha A, Ourahmane A, McVoy MA, Brabec V, Berners-Price SJ, Farrell NP. On the Biology of Werner's Complex. Angew Chem Int Ed Engl 2021; 60:17123-17130. [PMID: 34105220 PMCID: PMC8464317 DOI: 10.1002/anie.202105019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/30/2021] [Indexed: 11/05/2022]
Abstract
Werner's Complex, as a cationic coordination complex (CCC), has hitherto unappreciated biological properties derived from its binding affinity to highly anionic biomolecules such as glycosaminoglycans (GAGs) and nucleic acids. Competitive inhibitor and spectroscopic assays confirm the high affinity to GAGs heparin, heparan sulfate (HS), and its pentasaccharide mimetic Fondaparinux (FPX). Functional consequences of this affinity include inhibition of FPX cleavage by bacterial heparinase and mammalian heparanase enzymes with inhibition of cellular invasion and migration. Werner's Complex is a very efficient condensing agent for DNA and tRNA. In proof-of-principle for translational implications, it is demonstrated to display antiviral activity against human cytomegalovirus (HCMV) at micromolar concentrations with promising selectivity. Exploitation of non-covalent hydrogen-bonding and electrostatic interactions has motivated the unprecedented discovery of these properties, opening new avenues of research for this iconic compound.
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Affiliation(s)
- Raphael E F de Paiva
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, Qld., 4222, Australia
| | - Erica J Peterson
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284-2006, USA
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298-0037, USA
| | - Jaroslav Malina
- Institute of Biophysics, Czech Academy of Sciences, Kralovopolska 135, 61265, Brno, Czech Republic
| | - Mary Zoepfl
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284-2006, USA
| | - J David Hampton
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298-0037, USA
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, Virginia, 23298-0033, USA
| | - Wyatt E Johnson
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284-2006, USA
| | - Angelica Graminha
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284-2006, USA
| | - Amine Ourahmane
- Department of Pediatrics, Virginia Commonwealth University, Richmond, VA, 23298-0163, USA
| | - Michael A McVoy
- Department of Pediatrics, Virginia Commonwealth University, Richmond, VA, 23298-0163, USA
| | - Viktor Brabec
- Institute of Biophysics, Czech Academy of Sciences, Kralovopolska 135, 61265, Brno, Czech Republic
| | - Susan J Berners-Price
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, Qld., 4222, Australia
| | - Nicholas P Farrell
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, Qld., 4222, Australia
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284-2006, USA
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298-0037, USA
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7
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Monofunctional Platinum(II) Anticancer Agents. Pharmaceuticals (Basel) 2021; 14:ph14020133. [PMID: 33562293 PMCID: PMC7915149 DOI: 10.3390/ph14020133] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 12/15/2022] Open
Abstract
Platinum-based anticancer drugs represented by cisplatin play important roles in the treatment of various solid tumors. However, their applications are largely compromised by drug resistance and side effects. Much effort has been made to circumvent the drug resistance and general toxicity of these drugs. Among multifarious designs, monofunctional platinum(II) complexes with a general formula of [Pt(3A)Cl]+ (A: Ammonia or amine) stand out as a class of "non-traditional" anticancer agents hopeful to overcome the defects of current platinum drugs. This review aims to summarize the development of monofunctional platinum(II) complexes in recent years. They are classified into four categories: fluorescent complexes, photoactive complexes, targeted complexes, and miscellaneous complexes. The intention behind the designs is either to visualize the cellular distribution, or to reduce the side effects, or to improve the tumor selectivity, or inhibit the cancer cells through non-DNA targets. The information provided by this review may inspire researchers to conceive more innovative complexes with potent efficacy to shake off the drawbacks of platinum anticancer drugs.
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8
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Jia C, Deacon GB, Zhang Y, Gao C. Platinum(IV) antitumor complexes and their nano-drug delivery. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213640] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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9
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Rosa NMP, Arvellos JAF, Costa LAS. Molecular dynamics simulation of non-covalent interactions between polynuclear platinum(II) complexes and DNA. J Biol Inorg Chem 2020; 25:963-978. [PMID: 32914401 DOI: 10.1007/s00775-020-01817-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 08/30/2020] [Indexed: 10/23/2022]
Abstract
Several studies with substitution-inert polynuclear platinum(II) complexes (SI-PPC) have been carried out in recent years due to the form of DNA binding presented by these compounds. This form of bonding is achieved by molecular recognition through the formation of non-covalent structures, commonly called phosphate clamps and forks, which generate small extensions of the major and minor grooves. In this work, we use molecular dynamics simulations (MD) to study the formation of these cyclical structures between six different SI-PPCs and a double DNA dodecamer, here called 24_bp_DNA. The results showed the influence of the complex expressed on the number of phosphate clamps and forks formed. Based on the conformational characterization of the DNA fragment, we show that the studied SI-PPCs interact preferentially in the minor groove, causing groove spanning, except for two of them, Monoplatin and AH44. The phosphates of C-G pairs are the main sites for such non-covalent interactions. The Gibbs interaction energy of solvated species points out to AH78P, AH78H, and TriplatinNC as the most probable ones when coupled with DNA. As far as we know, this work is the very first one related to SI-PPCs which brings MD simulations and a complete analysis of the non-covalent interactions with a double DNA dodecamer.
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Affiliation(s)
- Nathália M P Rosa
- NEQC-Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, 36036-900, Brazil
| | - Júlio A F Arvellos
- NEQC-Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, 36036-900, Brazil
| | - Luiz Antônio S Costa
- NEQC-Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, 36036-900, Brazil.
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10
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Hrabina O, Malina J, Kostrhunova H, Novohradsky V, Pracharova J, Rogers N, Simpson DH, Scott P, Brabec V. Optically Pure Metallohelices That Accumulate in Cell Nuclei, Condense/Aggregate DNA, and Inhibit Activities of DNA Processing Enzymes. Inorg Chem 2020; 59:3304-3311. [DOI: 10.1021/acs.inorgchem.0c00092] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ondrej Hrabina
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
- Department of Biophysics, Centre of the Region Hana for Biotechnological and Agricultural Research, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic
| | - Jaroslav Malina
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Hana Kostrhunova
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Vojtech Novohradsky
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Jitka Pracharova
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
- Department of Biophysics, Centre of the Region Hana for Biotechnological and Agricultural Research, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic
| | - Nicola Rogers
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - Daniel H. Simpson
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - Peter Scott
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - Viktor Brabec
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
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12
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Kishimoto T, Yoshikawa Y, Yoshikawa K, Komeda S. Different Effects of Cisplatin and Transplatin on the Higher-Order Structure of DNA and Gene Expression. Int J Mol Sci 2019; 21:E34. [PMID: 31861648 PMCID: PMC6981875 DOI: 10.3390/ijms21010034] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/15/2019] [Accepted: 12/17/2019] [Indexed: 12/16/2022] Open
Abstract
Despite the effectiveness of cisplatin as an anticancer agent, its trans-isomer, transplatin, is clinically ineffective. Although both isomers target nuclear DNA, there is a large difference in the magnitude of their biological effects. Here, we compared their effects on gene expression in an in vitro luciferase assay and quantified their effects on the higher-order structure of DNA using fluorescence microscopy (FM) and atomic force microscopy (AFM). The inhibitory effect of cisplatin on gene expression was about 7 times that of transplatin. Analysis of the fluctuation autocorrelation function of the intrachain Brownian motion of individual DNA molecules showed that cisplatin increases the spring and damping constants of DNA by one order of magnitude and these visco-elastic characteristics tend to increase gradually over several hours. Transplatin had a weaker effect, which tended to decrease with time. These results agree with a stronger inhibitory effect of cisplatin on gene expression. We discussed the characteristic effects of the two compounds on the higher-order DNA structure and gene expression in terms of the differences in their binding to DNA.
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Affiliation(s)
- Toshifumi Kishimoto
- Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan; (T.K.); (Y.Y.); (K.Y.)
| | - Yuko Yoshikawa
- Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan; (T.K.); (Y.Y.); (K.Y.)
| | - Kenichi Yoshikawa
- Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan; (T.K.); (Y.Y.); (K.Y.)
| | - Seiji Komeda
- Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Mie 513-8670, Japan
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13
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Wang K, Ren XW, Wang XY, Xing SY, Zhu BL, Liu C. DNase I-Responsive Calixpyridinium-Mediated DNA Aggregation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10505-10511. [PMID: 31310550 DOI: 10.1021/acs.langmuir.9b01116] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, cationic macrocyclic calixpyridinium was employed as a new strategy to condense DNA. Moreover, the degradation of DNA by DNase I could lead to the calixpyridinium-DNA supramolecular aggregates being dissipated. Therefore, the present system is potentially applicable as the targeted drug delivery model at DNase I-overexpressed sites.
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Affiliation(s)
- Kui Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Binshuixi Road 393 , Xiqing District, Tianjin 300387 , China
| | - Xiao-Wei Ren
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Binshuixi Road 393 , Xiqing District, Tianjin 300387 , China
| | - Xiao-Yan Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Binshuixi Road 393 , Xiqing District, Tianjin 300387 , China
| | - Si-Yang Xing
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Binshuixi Road 393 , Xiqing District, Tianjin 300387 , China
| | - Bo-Lin Zhu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Binshuixi Road 393 , Xiqing District, Tianjin 300387 , China
| | - Chang Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Binshuixi Road 393 , Xiqing District, Tianjin 300387 , China
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14
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Two novel platinum(II) complexes with sorafenib and regorafenib: Synthesis, structural characterization, and evaluation of in vitro antitumor activity. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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15
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Rosa NMP, Ferreira FHDC, Farrell NP, Costa LAS. TriplatinNC and Biomolecules: Building Models Based on Non-covalent Interactions. Front Chem 2019; 7:307. [PMID: 31231629 PMCID: PMC6558404 DOI: 10.3389/fchem.2019.00307] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 04/18/2019] [Indexed: 11/30/2022] Open
Abstract
The class of polynuclear platinum(II) compounds have demonstrated a great interest because their high activity against cancer cells. Among these new compounds, the TriplatinNC also called AH78, demonstrated surprising antitumor activity, in some cases equivalent to cisplatin. It is well-known that complex charge +8 favors interaction with DNA and other biomolecules non-covalently, through the hydrogen bonds with phosphate and sulfate groups present in these structures. The hydrogen atoms of the amine interact with the oxygen atoms of the phosphate and sulfate groups present in the DNA strand and heparan sulfate, respectively. These interactions can cause significant twists in double helix and inhibit the activity of these biomolecules. The present investigation is an attempt to provide a benchmark theoretical study about TriplatinNC. We have described the non-covalent interactions through small reliable mimetic models. The non-covalent interactions were also evaluated on larger models containing DNA fractions with six nitrogenous base pairs (CGCGAA) and fractions of the disaccharide that makes the HS evaluated by the hybrid QM/MM ONIOM methodology.
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Affiliation(s)
- Nathália M. P. Rosa
- Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
| | - Frederico Henrique do C. Ferreira
- Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
| | - Nicholas P. Farrell
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, United States
| | - Luiz Antônio S. Costa
- Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
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Malina J, Čechová K, Farrell NP, Brabec V. Substitution-Inert Polynuclear Platinum Complexes with Dangling Amines: Condensation/Aggregation of Nucleic Acids and Inhibition of DNA-Related Enzymatic Activities. Inorg Chem 2019; 58:6804-6810. [PMID: 31046253 DOI: 10.1021/acs.inorgchem.9b00254] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The substitution-inert polynuclear platinum complexes (SI-PPCs) are now recognized as a distinct subclass of platinum anticancer drugs with high DNA binding affinity. Here, we investigate the effects of SI-PPCs containing dangling amine groups in place of NH3 as ligands to increase the length of the molecule and therefore overall charge and its distribution. The results obtained with the aid of biophysical techniques, such as total intensity light scattering, gel electrophoresis, and atomic force microscopy, show that addition of dangling amine groups considerably augments the ability of SI-PPCs to condense/aggregate nucleic acids. Moreover, this enhanced capability of SI-PPCs correlates with their heightened efficiency to inhibit DNA-related enzymatic activities, such as those connected with DNA transcription, catalysis of DNA relaxation by DNA topoisomerase I, and DNA synthesis catalyzed by Taq DNA polymerase. Thus, the addition of the dangling amine groups resulting in structures of SI-PPCs, which differ so markedly from the derivatives of cisplatin used in the clinic, appears to contribute to the overall biological activity of these molecules.
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Affiliation(s)
- Jaroslav Malina
- Czech Academy of Sciences , Institute of Biophysics , Kralovopolska 135 , CZ-61265 Brno , Czech Republic
| | - Klára Čechová
- Czech Academy of Sciences , Institute of Biophysics , Kralovopolska 135 , CZ-61265 Brno , Czech Republic
| | - Nicholas P Farrell
- Department of Chemistry , Virginia Commonwealth University , Richmond , Virginia 23284-2006 , United States
| | - Viktor Brabec
- Czech Academy of Sciences , Institute of Biophysics , Kralovopolska 135 , CZ-61265 Brno , Czech Republic
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17
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Malina J, Farrell NP, Brabec V. Substitution-Inert Polynuclear Platinum Complexes Act as Potent Inducers of Condensation/Aggregation of Short Single- and Double-Stranded DNA and RNA Oligonucleotides. Chemistry 2019; 25:2995-2999. [PMID: 30565774 DOI: 10.1002/chem.201806276] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Indexed: 01/18/2023]
Abstract
Compounds condensing DNA and RNA molecules can essentially affect important biological processes including DNA replication and transcription. Here, this work shows with the aid of total intensity light scattering, gel electrophoresis, and atomic force microscopy (AFM) that the substitution-inert polynuclear platinum complexes (SI-PPCs), particularly [{trans-Pt(NH3 )2 (NH2 (CH2 )6 - NH3 + )}2 -μ-{trans-Pt(NH3 )2 (NH2 (CH2 )6 NH2 )2 }]8+ (Triplatin NC), exhibit an unprecedented high potency to condense/aggregate fragments of DNA and RNA as short as 20 base pairs. SI-PPCs condensates are distinctive from those generated by the naturally occurring polyamines (commonly used DNA compacting/condensing agents). Collectively, the results further confirm that SI-PPCs are very efficient inducers of condensation of DNA and RNA, including their short fragments that might have potential in gene therapy, biotechnology, and bionanotechnology. Moreover, the data confirm the structural advantages of the phosphate clamp, with a well-defined rigid DNA recognition motif in initiating condensation and aggregation phenomena on oligonucleotides.
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Affiliation(s)
- Jaroslav Malina
- Institute of Biophysics, Czech Academy of Sciences, Kralovopolska 135, 61265, Brno, Czech Republic
| | - Nicholas P Farrell
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284-2006, USA
| | - Viktor Brabec
- Institute of Biophysics, Czech Academy of Sciences, Kralovopolska 135, 61265, Brno, Czech Republic
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18
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Konovalov B, Živković MD, Milovanović JZ, Djordjević DB, Arsenijević AN, Vasić IR, Janjić GV, Franich A, Manojlović D, Skrivanj S, Milovanović MZ, Djuran MI, Rajković S. Synthesis, cytotoxic activity and DNA interaction studies of new dinuclear platinum(ii) complexes with an aromatic 1,5-naphthyridine bridging ligand: DNA binding mode of polynuclear platinum(ii) complexes in relation to the complex structure. Dalton Trans 2019; 47:15091-15102. [PMID: 30303498 DOI: 10.1039/c8dt01946k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, spectroscopic characterization, cytotoxic activity and DNA binding evaluation of seven new dinuclear platinum(ii) complexes Pt1-Pt7, with the general formula [{Pt(L)Cl}2(μ-1,5-nphe)](ClO4)2 (1,5-nphe is 1,5-naphthyridine; while L is two ammines (Pt1) or one bidentate coordinated diamine: ethylenediamine (Pt2), (±)-1,2-propylenediamine (Pt3), trans-(±)-1,2-diaminocyclohexane (Pt4), 1,3-propylenediamine (Pt5), 2,2-dimethyl-1,3-propylenediamine (Pt6), and 1,3-pentanediamine (Pt7)), were reported. In vitro cytotoxic activity of these complexes was evaluated against three tumor cell lines, murine colon carcinoma (CT26), murine mammary carcinoma (4T1) and murine lung cancer (LLC1) and two normal cell lines, murine mesenchymal stem cells (MSC) and human fibroblast (MRC-5) cells. The results of the MTT assay indicate that all investigated complexes have almost no cytotoxic effects on 4T1 and very low cytotoxicity toward LLC1 cell lines. In contrast to the effects on LLC1 and 4T1 cells, complexes Pt1 and Pt2 had significant cytotoxic activity toward CT26 cells. Complex Pt1 had a much lower IC50 value for activity on CT26 cells compared with cisplatin. In comparison with cisplatin, all dinuclear Pt1-Pt7 complexes showed lower cytotoxicity toward normal MSC and MRC-5 cells. In order to measure the amount of platinum(ii) complexes taken up by the cells, we quantified the cellular platinum content using inductively coupled plasma mass spectrometry (ICP-QMS). Molecular docking studies performed to evaluate the potential binding mode of dinuclear platinum(ii) complexes Pt1-Pt7 and their aqua derivatives W1-W7, respectively, at the double stranded DNA showed that groove spanning and backbone tracking are the most stable binding modes.
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Affiliation(s)
- Bata Konovalov
- University of Kragujevac, Faculty of Science, Department of Chemistry, R. Domanovića 12, 34000 Kragujevac, Serbia.
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19
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Shi H, Romero-Canelón I, Hreusova M, Novakova O, Venkatesh V, Habtemariam A, Clarkson GJ, Song JI, Brabec V, Sadler PJ. Photoactivatable Cell-Selective Dinuclear trans-Diazidoplatinum(IV) Anticancer Prodrugs. Inorg Chem 2018; 57:14409-14420. [PMID: 30365308 PMCID: PMC6257630 DOI: 10.1021/acs.inorgchem.8b02599] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
A series of dinuclear
octahedral PtIV complexes trans,trans,trans-[{Pt(N3)2(py)2(OH)(OC(O)CH2CH2C(O)NH)}2R] containing pyridine (py) and bridging
dicarboxylate [R = −CH2CH2– (1), trans-1,2-C6H10– (2), p-C6H4– (3), −CH2CH2CH2CH2– (4)] ligands have
been synthesized and characterized, including the X-ray crystal structures
of complexes 1·2MeOH and 4, the first
photoactivatable dinuclear PtIV complexes with azido ligands.
The complexes are highly stable in the dark, but upon photoactivation
with blue light (420 nm), they release the bridging ligand and mononuclear
photoproducts. Upon irradiation with blue light (465 nm), they generate
azidyl and hydroxyl radicals, detected using a 5,5-dimethyl-1-pyrroline N-oxide electron paramagnetic resonance spin trap, accompanied
by the disappearance of the ligand-to-metal charge-transfer (N3 → Pt) band at ca. 300 nm. The dinuclear complexes
are photocytotoxic to human cancer cells (465 nm, 4.8 mW/cm2, 1 h), including A2780 human ovarian and esophageal OE19 cells with
IC50 values of 8.8–78.3 μM, whereas cisplatin
is inactive under these conditions. Complexes 1, 3, and 4 are notably more photoactive toward
cisplatin-resistant ovarian A2780cis compared to A2780 cells. Remarkably,
all of the complexes were relatively nontoxic toward normal cells
(MRC5 lung fibroblasts), with IC50 values >100 μM,
even after irradiation. The introduction of an aromatic bridging ligand
(3) significantly enhanced cellular uptake. The populations
in the stages of the cell cycle remained unchanged upon treatment
with complexes in the dark, while the population of the G2/M phase
increased upon irradiation, suggesting that DNA is a target for these
photoactivated dinuclear PtIV complexes. Liquid chromatography–mass
spectrometry data show that the photodecomposition pathway of the
dinuclear complexes results in the release of two molecules of mononuclear
platinum(II) species. As a consequence, DNA binding of the dinuclear
complexes after photoactivation in cell-free media is, in several
respects, qualitatively similar to that of the photoactivated mononuclear
complex FM-190. After photoactivation, they were 2-fold
more effective in quenching the fluorescence of EtBr bound to DNA,
forming DNA interstrand cross-links and unwinding DNA compared to
the photoactivated FM-190. Novel all-trans dinuclear
PtIV complexes bridged
by a dicarboxylate linker, highly stable in the dark, generate azidyl
and hydroxyl radicals upon irradiation with blue light. They are photocytotoxic
to human cancer cells, whereas cisplatin was inactive under these
conditions and more photoactive toward cisplatin-resistant ovarian
cancer cells compared to wild-type cells. Remarkably, the dinuclear
complexes were relatively nontoxic toward normal human cells. Cell
cycle and DNA binding experiments suggested that DNA is a target.
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Affiliation(s)
- Huayun Shi
- Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K
| | - Isolda Romero-Canelón
- Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K.,School of Pharmacy, Institute of Clinical Sciences , University of Birmingham , Birmingham B15 2TT , U.K
| | - Monika Hreusova
- Department of Biophysics, Faculty of Science , Palacky University , 17 listopadu 12 , Olomouc CZ-77146 , Czech Republic.,Institute of Biophysics , Czech Academy of Sciences , Kralovopolska 135 , Brno CZ-61265 , Czech Republic
| | - Olga Novakova
- Institute of Biophysics , Czech Academy of Sciences , Kralovopolska 135 , Brno CZ-61265 , Czech Republic
| | - V Venkatesh
- Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K
| | - Abraha Habtemariam
- Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K
| | - Guy J Clarkson
- Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K
| | - Ji-Inn Song
- Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K
| | - Viktor Brabec
- Institute of Biophysics , Czech Academy of Sciences , Kralovopolska 135 , Brno CZ-61265 , Czech Republic
| | - Peter J Sadler
- Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K
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Malina J, Farrell NP, Brabec V. Substitution-Inert Polynuclear Platinum Complexes That Inhibit the Activity of DNA Polymerase in Triplex-Forming Templates. Angew Chem Int Ed Engl 2018; 57:8535-8539. [PMID: 29766623 DOI: 10.1002/anie.201803448] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 04/24/2018] [Indexed: 11/07/2022]
Abstract
The formation of triple-helical DNA is implicated in the regulation of gene expression. The triplexes are, however, unstable under physiological conditions so that effective stabilizers for the triplex formation are needed. Herein, we describe a new strategy for the stabilization of such triplexes that is based on antitumor substitution-inert polynuclear platinum complexes (SI-PPCs). These compounds were previously shown to bind to DNA through the phosphate clamp-a discrete mode of DNA-ligand recognition distinct from the canonical intercalation and minor-groove binding. We have found that SI-PPCs efficiently inhibit DNA synthesis by DNA polymerase in sequences prone to the formation of pyrimidine- and purine-motif triplex DNAs. Moreover, the results suggest that SI-PPCs are able to induce the formation of triple-helical DNA between duplexes and strands that are not completely complementary to each other. Collectively, these data provide evidence that SI-PPCs are very efficient stabilizers of triple-stranded DNA that might exert their action by stabilizing higher-order structures such as triple-helical DNA.
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Affiliation(s)
- Jaroslav Malina
- Institute of Biophysics, Czech Academy of Sciences, Kralovopolska 135, CZ-61265, Brno, Czech Republic
| | - Nicholas P Farrell
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284-2006, USA
| | - Viktor Brabec
- Institute of Biophysics, Czech Academy of Sciences, Kralovopolska 135, CZ-61265, Brno, Czech Republic
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21
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Malina J, Farrell NP, Brabec V. Substitution‐Inert Polynuclear Platinum Complexes That Inhibit the Activity of DNA Polymerase in Triplex‐Forming Templates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803448] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jaroslav Malina
- Institute of Biophysics Czech Academy of Sciences Kralovopolska 135 CZ-61265 Brno Czech Republic
| | - Nicholas P. Farrell
- Department of Chemistry Virginia Commonwealth University Richmond VA 23284-2006 USA
| | - Viktor Brabec
- Institute of Biophysics Czech Academy of Sciences Kralovopolska 135 CZ-61265 Brno Czech Republic
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22
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Hormann J, Malina J, Lemke O, Hülsey MJ, Wedepohl S, Potthoff J, Schmidt C, Ott I, Keller BG, Brabec V, Kulak N. Multiply Intercalator-Substituted Cu(II) Cyclen Complexes as DNA Condensers and DNA/RNA Synthesis Inhibitors. Inorg Chem 2018; 57:5004-5012. [DOI: 10.1021/acs.inorgchem.8b00027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Hormann
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - Jaroslav Malina
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 61265 Brno, Czech Republic
| | - Oliver Lemke
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Max J. Hülsey
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
- Biochemistry Center, Heidelberg University, Im Neuenheimer Feld 328, 69120 Heidelberg, Germany
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Stefanie Wedepohl
- Institut für Chemie und Biochemie, Organische Chemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Jan Potthoff
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - Claudia Schmidt
- Institut für Medizinische und Pharmazeutische Chemie, Technische Universität Braunschweig, Beethovenstr. 55, 38106 Braunschweig, Germany
| | - Ingo Ott
- Institut für Medizinische und Pharmazeutische Chemie, Technische Universität Braunschweig, Beethovenstr. 55, 38106 Braunschweig, Germany
| | - Bettina G. Keller
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 61265 Brno, Czech Republic
| | - Nora Kulak
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
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23
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Katner SJ, Johnson WE, Peterson EJ, Page P, Farrell NP. Comparison of Metal-Ammine Compounds Binding to DNA and Heparin. Glycans as Ligands in Bioinorganic Chemistry. Inorg Chem 2018; 57:3116-3125. [PMID: 29473748 DOI: 10.1021/acs.inorgchem.7b03043] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present spectroscopic and biophysical approaches to examine the affinity of metal-ammine coordination complexes for heparin as a model for heparan sulfate (HS). Similar to nucleic acids, the highly anionic nature of heparin means it is associated in vivo with physiologically relevant cations, and this work extends their bioinorganic chemistry to substitution-inert metal-ammine compounds (M). Both indirect and direct assays were developed. M compounds are competitive inhibitors of methylene blue (MB)-heparin binding, and the change in the absorbance of the dye in the presence or absence of heparin can be used as an indirect reporter of M-heparin affinity. A second indirect assay uses the change in fluorescence of TAMRA-R9, a nonaarginine linked to a fluorescent TAMRA moiety, as a reporter for M-heparin binding. Direct assays are surface plasmon resonance (SPR) and isothermal titration calorimetry (ITC). The Kd values for TriplatinNC-heparin varied to some extent depending on the technique from 33.1 ± 2 nM (ITC) to 66.4 ± 1.3 nM (MB absorbance assay) and 340 ± 30 nM (SPR). The differences are explained by the nature of the technique and the use of heparin of differing molecular weight. Indirect probes using the displacement of ethidium bromide from DNA or, separately, fluorescently labeled oligonucleotide (DNA-Fl) can measure the relative affinities of heparin and DNA for M compounds. These assays showed essentially equivalent affinity of TriplatinNC for heparin and DNA. The generality of these methods was confirmed with a series of mononuclear cobalt, ruthenium, and platinum compounds with significantly lower affinity because of their smaller overall positive charge but in the order [Co(NH3)6]3+ > [Ru(NH3)6]3+ > [Pt(NH3)4]2+. The results on heparin can be extrapolated to glycosoaminoglycans such as HS, emphasizing the relevance of glycan interactions in understanding the biological properties of coordination compounds and the utility of the metalloglycomics concept for extending bioinorganic chemistry to this class of important biomolecules.
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Affiliation(s)
- Samantha J Katner
- Department of Chemistry and Massey Cancer Center , Virginia Commonwealth University (VCU) , Richmond , Virginia 23284 , United States
| | - Wyatt E Johnson
- Department of Chemistry and Massey Cancer Center , Virginia Commonwealth University (VCU) , Richmond , Virginia 23284 , United States
| | - Erica J Peterson
- Department of Chemistry and Massey Cancer Center , Virginia Commonwealth University (VCU) , Richmond , Virginia 23284 , United States
| | - Phillip Page
- Reichert Technologies , Depew , New York 14043 , United States
| | - Nicholas P Farrell
- Department of Chemistry and Massey Cancer Center , Virginia Commonwealth University (VCU) , Richmond , Virginia 23284 , United States
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24
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Cai L, Yu C, Ba L, Liu Q, Qian Y, Yang B, Gao C. Anticancer platinum-based complexes with non-classical structures. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4228] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Linxiang Cai
- Faculty of Life Science and Technology; Kunming University of Science and Technology; Kunming 650500 China
| | - Congtao Yu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; Kunming 650500 China
| | - Linkui Ba
- Faculty of Life Science and Technology; Kunming University of Science and Technology; Kunming 650500 China
| | - Qinghua Liu
- Faculty of Life Science and Technology; Kunming University of Science and Technology; Kunming 650500 China
| | - Yunxu Qian
- Faculty of Life Science and Technology; Kunming University of Science and Technology; Kunming 650500 China
| | - Bo Yang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; Kunming 650500 China
| | - Chuanzhu Gao
- Faculty of Life Science and Technology; Kunming University of Science and Technology; Kunming 650500 China
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25
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Ferraro G, Mansour AM, Merlino A. Exploring the interactions between model proteins and Pd(ii) or Pt(ii) compounds bearing charged N,N-pyridylbenzimidazole bidentate ligands by X-ray crystallography. Dalton Trans 2018; 47:10130-10138. [DOI: 10.1039/c8dt01663a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
X-ray structure of the adducts formed between lysozyme and Pd(ii) and Pt(ii) compounds bearing N,N-pyridylbenzimidazole derivatives with an alkylated sulfonate or phosphonium side chain are reported.
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Affiliation(s)
- Giarita Ferraro
- Department of Chemical Sciences
- University of Naples Federico II
- Complesso Universitario di Monte Sant'Angelo
- 80126 Napoli
- Italy
| | - Ahmed M. Mansour
- Department of Chemistry
- Faculty of Science
- Cairo University
- Giza
- Egypt
| | - Antonello Merlino
- Department of Chemical Sciences
- University of Naples Federico II
- Complesso Universitario di Monte Sant'Angelo
- 80126 Napoli
- Italy
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Zou S, Li G, Rees TW, Jin C, Huang J, Chen Y, Ji L, Chao H. Interfering with DNA High-Order Structures using Chiral Ruthenium(II) Complexes. Chemistry 2017; 24:690-698. [PMID: 29112314 DOI: 10.1002/chem.201704403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Indexed: 12/31/2022]
Abstract
In this work, it was found that DNA can undergo B-Z transformational changes and compaction in the presence of DNA intercalators such as ruthenium(II) polypyridyl complexes. The link between B-Z transition and condensation is weak but can be strengthened under certain circumstances with slight alterations to the structures of the ruthenium(II) complexes. Here, following on from previous research, this work reports a series of ruthenium(II) complexes with imidazophenanthroline ligands, which vary in size and planarity. The complexes exhibit distinct effects on DNA structures, ranging from little impact to the transformation of DNA secondary structures to the formation of higher-order DNA structures. Further studies on DNA morphological changes induced by chiral ruthenium(II) complexes are observed by atomic force microscopy and transmission electron microscopy.
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Affiliation(s)
- Shanshan Zou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Guanying Li
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Thomas W Rees
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Chengzhi Jin
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Juanjuan Huang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Yu Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Liangnian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Hui Chao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
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27
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Brabec V, Hrabina O, Kasparkova J. Cytotoxic platinum coordination compounds. DNA binding agents. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.04.013] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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28
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Raza MK, Gautam S, Garai A, Mitra K, Kondaiah P, Chakravarty AR. Monofunctional BODIPY-Appended Imidazoplatin for Cellular Imaging and Mitochondria-Targeted Photocytotoxicity. Inorg Chem 2017; 56:11019-11029. [PMID: 28846407 DOI: 10.1021/acs.inorgchem.7b01346] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Monofunctional platinum(II) complexes of formulation cis-[Pt(NH3)2(L)Cl](NO3), where L is an imidazole base conjugated to 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) with emissive (L1 in 1) and nonemissive (L2 in 2) moieties were prepared and characterized, and their singlet oxygen-mediated photoinduced cytotoxicity was studied. The 1-methylimidazole (1-MeIm) complex 3 was prepared as a control and for structural characterization by X-ray crystallography. Complexes 1 and 2 showed strong visible absorption bands at 500 nm (ε = 2.7 × 104 M-1 cm-1) and 540 nm (1.4 × 104 M-1 cm-1). Complex 1 is emissive with a band at 510 nm (ΦF = 0.09) in 1% dimethyl sulfoxide/Dulbecco's Modified Eagle's Medium (pH 7.2). Singlet oxygen generation upon photoirradiation with visible light (400-700 nm) was evidenced from 1,3-diphenylisobenzofuran titration experiments showing significant photosensitizing ability of the BODIPY complexes. Both 1 and 2 were remarkably photocytotoxic in visible light (400-700 nm, 10 J cm-2) in skin keratinocyte HaCaT and breast cancer MCF-7 cells giving IC50 values in nanomolar concentration. The complexes were, however, essentially nontoxic to the cells in the dark (IC50 > 80 μM). Complex 2 having a diiodo-BODIPY unit is nonemissive but an efficient photosensitizer with high singlet oxygen generation ability in visible light (400-700 nm). Confocal microscopy using the emissive complex 1 showed significant mitochondrial localization of the complex. Cell death via apoptotic pathway was observed from the Annexin-V-FITC/PI assay. The formation of Pt-DNA adducts was evidenced from the binding experiments of the complexes 1 and 2 with 9-ethylguanine as a model nucleobase from 1H NMR and mass spectral studies.
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Affiliation(s)
- Md Kausar Raza
- Department of Inorganic and Physical Chemistry and ‡Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore 560012, India
| | - Srishti Gautam
- Department of Inorganic and Physical Chemistry and ‡Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore 560012, India
| | - Aditya Garai
- Department of Inorganic and Physical Chemistry and ‡Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore 560012, India
| | - Koushambi Mitra
- Department of Inorganic and Physical Chemistry and ‡Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore 560012, India
| | - Paturu Kondaiah
- Department of Inorganic and Physical Chemistry and ‡Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore 560012, India
| | - Akhil R Chakravarty
- Department of Inorganic and Physical Chemistry and ‡Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore 560012, India
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Uemura M, Komeda S. Kinetic analysis of and platinum(II) migration in the reactions of tetrazolato-bridged dinuclear platinum(II) complexes with nucleotides. J Inorg Biochem 2017; 177:359-367. [PMID: 28893417 DOI: 10.1016/j.jinorgbio.2017.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/31/2017] [Accepted: 08/22/2017] [Indexed: 01/25/2023]
Abstract
The series of tetrazolato-bridged complexes with the formula [{cis‑Pt(NH3)2}2(μ-OH)(μ-5-H-tetrazolato-N1,N2)]2+ (5-H-X) or [{cis‑Pt(NH3)2}2(μ-OH)(μ-5-R-tetrazolato-N2,N3)]n+ (R=H (5-H-Y), CH3 (1), CH2COOCH2CH3 (2), CH2COO- (3), n=2 (5-H-Y, 1, 2) or 1 (3)) are promising candidate complexes for formulation as next-generation platinum-based anticancer drugs that form multimodal bindings with DNA molecules. These multimodal bindings involve both non-covalent and covalent interactions, the latter of which are acknowledged to be essential for platinum-based drugs to exert their anticancer activity. In the present study, the tetrazolato-bridged complexes reacted with two molar equivalents of guanosine-5'-monophosphate (GMP) to yield the 1:2 reaction products [{cis‑Pt(NH3)2(GMP-N7)}2(μ-5-R-tetrazolato-N1,N3)]2- or 1-. This reaction was accompanied by an intramolecular Pt(II) migration that contributed to the formation of diverse DNA crosslinking, such as interhelical crosslinks. The second-order reaction rate constants for the reactions performed in phosphate-buffered D2O solution showed that the reactivity of the complexes decreased in the order 5-H-X≳5-H-Y>2≳1>3 and that reactivity was correlated with the cytotoxicity of the complexes. A similar result was obtained for the reaction of the complexes with calf thymus DNA in which the formation of covalent DNA adducts was quantified by means of inductively coupled plasma mass spectrometry. These results suggest that overall charge affects the kinetics of the reactions of platinum complexes with GMP and calf thymus DNA. Thus, the positive charge of the complexes affects not only the non-covalent but also the covalent interactions between the complexes and nucleotides and DNA, which are negatively charged molecules.
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Affiliation(s)
- Masako Uemura
- Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka 513-8670, Japan
| | - Seiji Komeda
- Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka 513-8670, Japan.
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Shimizu Y, Yoshikawa Y, Kenmotsu T, Komeda S, Yoshikawa K. Conformational transition of DNA by dinuclear Pt(II) complexes causes cooperative inhibition of gene expression. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.04.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Lamego I, Marques MPM, Duarte IF, Martins AS, Oliveira H, Gil AM. Impact of the Pd 2Spermine Chelate on Osteosarcoma Metabolism: An NMR Metabolomics Study. J Proteome Res 2017; 16:1773-1783. [PMID: 28244322 DOI: 10.1021/acs.jproteome.7b00035] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A metabolomics study of Pd2Spermine(Spm) on osteosarcoma MG-63 and osteoblastic HOb cells is presented to assess the impact of the potential palladium drug on cell metabolism compared with cisplatin (cDDP). Despite its higher cytotoxicity, Pd2Spm induced lower (and reversible) metabolic impact on MG-63 cells and the absence of apoptosis; conversely, it induced significant deviations in osteoblastic amino acid metabolism. However, when in combination with doxorubicin and methotrexate, Pd2Spm induced strong metabolic deviations on lipids, choline compounds, amino acids, nucleotides, and compounds related to antioxidative mechanisms (e.g., glutathione, inositol, hypoxanthine), similarly to the cDDP cocktail. Synergetic effects included triggering of lipid biosynthesis by Pd2Spm in the presence of doxorubicin (and reinforced by methotrexate) and changes in the glycosylation substrate uridine diphosphate acetylgalactosamine and methionine and serine metabolisms. This work provides promising results related to the impact of Pd2Spm on osteosarcoma cellular metabolism, particularly in drug combination protocols. Lipid metabolism, glycosylation, and amino acid metabolisms emerge as relevant features for targeted studies to further understand a potential anticancer mechanism of combined Pd2Spm.
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Affiliation(s)
- Inês Lamego
- Department of Chemistry and CICECO-Aveiro Institute of Materials, (CICECO/UA), University of Aveiro , 3810 Aveiro, Portugal.,R&D Unit "Molecular Physical-Chemistry", University of Coimbra , 3000-213 Coimbra, Portugal
| | - M Paula M Marques
- R&D Unit "Molecular Physical-Chemistry", University of Coimbra , 3000-213 Coimbra, Portugal.,Department of Life Sciences, Faculty of Science and Technology, University of Coimbra , 3000-213 Coimbra, Portugal
| | - Iola F Duarte
- Department of Chemistry and CICECO-Aveiro Institute of Materials, (CICECO/UA), University of Aveiro , 3810 Aveiro, Portugal
| | - Ana S Martins
- Department of Chemistry and CICECO-Aveiro Institute of Materials, (CICECO/UA), University of Aveiro , 3810 Aveiro, Portugal
| | - Helena Oliveira
- Department of Biology & CESAM, University of Aveiro , 3810 Aveiro, Portugal
| | - Ana M Gil
- Department of Chemistry and CICECO-Aveiro Institute of Materials, (CICECO/UA), University of Aveiro , 3810 Aveiro, Portugal
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Komeda S, Yoneyama H, Uemura M, Muramatsu A, Okamoto N, Konishi H, Takahashi H, Takagi A, Fukuda W, Imanaka T, Kanbe T, Harusawa S, Yoshikawa Y, Yoshikawa K. Specific Conformational Change in Giant DNA Caused by Anticancer Tetrazolato-Bridged Dinuclear Platinum(II) Complexes: Middle-Length Alkyl Substituents Exhibit Minimum Effect. Inorg Chem 2017; 56:802-811. [PMID: 28045514 DOI: 10.1021/acs.inorgchem.6b02239] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Derivatives of the highly antitumor-active compound [{cis-Pt(NH3)2}2(μ-OH)(μ-tetrazolato-N2,N3)]2+ (5-H-Y), which is a tetrazolato-bridged dinuclear platinum(II) complex, were prepared by substituting a linear alkyl chain moiety at C5 of the tetrazolate ring. The general formula for the derivatives is [{cis-Pt(NH3)2}2(μ-OH)(μ-5-R-tetrazolato-N2,N3)]2+, where R is (CH2)nCH3 and n = 0 to 8 (complexes 1-9). The cytotoxicity of complexes 1-4 in NCI-H460 human non-small-cell lung cancer cells decreased with increasing alkyl chain length, and those of complexes 5-9 increased with increasing alkyl chain length. That is, the in vitro cytotoxicity of complexes 1-9 was found to have a U-shaped association with alkyl chain length. This U-shaped association is attributable to the degree of intracellular accumulation. Although circular dichroism spectroscopic measurement indicated that complexes 1-9 induced comparable conformational changes in the secondary structure of DNA, the tetrazolato-bridged complexes induced different degrees of DNA compaction as revealed by a single DNA measurement with fluorescence microsopy, which also had a U-shaped association with alkyl chain length that matched the association observed for cytotoxicity. Complexes 7-9, which had alkyl chains long enough to confer surfactant-like properties to the complex, induced DNA compaction 20 or 1000 times more efficiently than 5-H-Y or spermidine. A single DNA measurement with transmission electron microscopy revealed that complex 8 formed large spherical self-assembled structures that induced DNA compaction with extremely high efficiency. This result suggests that these structures may play a role in the DNA compaction that was induced by the complexes with the longer alkyl chains. The derivatization with a linear alkyl chain produced a series of complexes with unique cellular accumulation and DNA conformational change profiles and a potentially useful means of developing next-generation platinum-based anticancer drugs. In addition, the markedly high ability of these complexes to induce DNA compaction and their high intracellular accumulation emphasized the difference in mechanism of action from platinum-based anticancer drugs.
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Affiliation(s)
- Seiji Komeda
- Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science , Suzuka, Mie 513-8670, Japan
| | - Hiroki Yoneyama
- Faculty of Pharmaceutical Sciences, Osaka University of Pharmaceutical Sciences , Takatsuki, Osaka 569-1094, Japan
| | - Masako Uemura
- Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science , Suzuka, Mie 513-8670, Japan
| | - Akira Muramatsu
- Faculty of Life and Medical Sciences, Doshisha University , Kyotanabe, Kyoto 610-0394, Japan
| | - Naoto Okamoto
- Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science , Suzuka, Mie 513-8670, Japan
| | - Hiroaki Konishi
- Yakult Central Institute , Yakult Honsha Co., Ltd., Kunitachi, Tokyo 186-8650, Japan
| | - Hiroyuki Takahashi
- Pharmaceutical Research and Development Department, Yakult Honsha Co., Ltd. , Chuo, Tokyo 104-0061, Japan
| | - Akimitsu Takagi
- Yakult Central Institute , Yakult Honsha Co., Ltd., Kunitachi, Tokyo 186-8650, Japan
| | - Wakao Fukuda
- Department of Biotechnology, College of Life Sciences, Ritsumeikan University , Kusatsu, Shiga 525-8577, Japan
| | - Tadayuki Imanaka
- Department of Biotechnology, College of Life Sciences, Ritsumeikan University , Kusatsu, Shiga 525-8577, Japan
| | - Toshio Kanbe
- Laboratory of Medical Mycology, Research Institute for Disease Mechanism and Control, School of Medicine, Nagoya University , Nagoya 464-0064, Japan
| | - Shinya Harusawa
- Faculty of Pharmaceutical Sciences, Osaka University of Pharmaceutical Sciences , Takatsuki, Osaka 569-1094, Japan
| | - Yuko Yoshikawa
- Faculty of Life and Medical Sciences, Doshisha University , Kyotanabe, Kyoto 610-0394, Japan
| | - Kenichi Yoshikawa
- Faculty of Life and Medical Sciences, Doshisha University , Kyotanabe, Kyoto 610-0394, Japan
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Xue X, Zhu C, Chen H, Bai Y, Shi X, Jiao Y, Chen Z, Miao Y, He W, Guo Z. A New Approach to Sensitize Antitumor Monofunctional Platinum(II) Complexes via Short Time Photo-Irradiation. Inorg Chem 2016; 56:3754-3762. [DOI: 10.1021/acs.inorgchem.6b02148] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xuling Xue
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Chengcheng Zhu
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Huachao Chen
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yang Bai
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Xiangchao Shi
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yang Jiao
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Zhongyan Chen
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yupeng Miao
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Weijiang He
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Zijian Guo
- State Key Laboratory
of Coordination Chemistry, Coordination Chemistry Institute, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
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McStay N, Molphy Z, Coughlan A, Cafolla A, McKee V, Gathergood N, Kellett A. C 3-symmetric opioid scaffolds are pH-responsive DNA condensation agents. Nucleic Acids Res 2016; 45:527-540. [PMID: 27899572 PMCID: PMC5314759 DOI: 10.1093/nar/gkw1097] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 10/11/2016] [Accepted: 10/27/2016] [Indexed: 01/28/2023] Open
Abstract
Herein we report the synthesis of tripodal C3-symmetric opioid scaffolds as high-affinity condensation agents of duplex DNA. Condensation was achieved on both supercoiled and canonical B-DNA structures and identified by agarose electrophoresis, viscosity, turbidity and atomic force microscopy (AFM) measurements. Structurally, the requirement of a tris-opioid scaffold for condensation is demonstrated as both di- (C2-symmetric) and mono-substituted (C1-symmetric) mesitylene-linked opioid derivatives poorly coordinate dsDNA. Condensation, observed by toroidal and globule AFM aggregation, arises from surface-binding ionic interactions between protonated, cationic, tertiary amine groups on the opioid skeleton and the phosphate nucleic acid backbone. Indeed, by converting the 6-hydroxyl group of C3-morphine (MC3) to methoxy substituents in C3-heterocodeine (HC3) and C3-oripavine (OC3) molecules, dsDNA compaction is retained thus negating the possibility of phosphate—hydroxyl surface-binding. Tripodal opioid condensation was identified as pH dependent and strongly influenced by ionic strength with further evidence of cationic amine-phosphate backbone coordination arising from thermal melting analysis and circular dichroism spectroscopy, with compaction also witnessed on synthetic dsDNA co-polymers poly[d(A-T)2] and poly[d(G-C)2]. On-chip microfluidic analysis of DNA condensed by C3-agents provided concentration-dependent protection (inhibition) to site-selective excision by type II restriction enzymes: BamHI, HindIII, SalI and EcoRI, but not to the endonuclease DNase I.
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Affiliation(s)
- Natasha McStay
- School of Chemical Sciences and National Institute for Cellular Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Zara Molphy
- School of Chemical Sciences and National Institute for Cellular Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Alan Coughlan
- School of Chemical Sciences and National Institute for Cellular Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Attilio Cafolla
- School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Vickie McKee
- School of Chemical Sciences and National Institute for Cellular Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Nicholas Gathergood
- Department of Chemistry, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Andrew Kellett
- School of Chemical Sciences and National Institute for Cellular Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
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Batista de Carvalho ALM, Medeiros PSC, Costa FM, Ribeiro VP, Sousa JB, Diniz C, Marques MPM. Anti-Invasive and Anti-Proliferative Synergism between Docetaxel and a Polynuclear Pd-Spermine Agent. PLoS One 2016; 11:e0167218. [PMID: 27880824 PMCID: PMC5120851 DOI: 10.1371/journal.pone.0167218] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 11/10/2016] [Indexed: 11/30/2022] Open
Abstract
The present work is aimed at evaluating the antitumour properties of a Pd(II) dinuclear complex with the biogenic polyamine spermine, by investigating: i) the anti-angiogenic and anti-migration properties of a Pd(II) dinuclear complex with spermine (Pd2Spm); ii) the anti-proliferative activity of Pd2Spm against a triple negative human breast carcinoma (MDA-MB-231); and finally iii) the putative interaction mediated by combination of Pd2Spm with Docetaxel. Anti-invasive (anti-angiogenic and anti-migratory) as well as anti-proliferative capacities were assessed, for different combination schemes and drug exposure times, using the CAM assay and VEGFR2 activity measurement, the MatrigelTM method and the SRB proliferation test. The results thus obtained evidence the ability of Pd2Spm to restrict angiogenesis and cell migration: Pd2Spm induced a marked inhibition of migration (43.8±12.2%), and a higher inhibition of angiogenesis (81.8±4.4% for total length values, at 4 μM) as compared to DTX at the clinical dosage 4x10-2 μM (26.4±14.4%; n = 4 to 11). Combination of Pd2Spm/DTX was more effective as anti-invasive and anti-proliferative than DTX or Pd2Spm in sole administration, which is compatible with the occurrence of synergism: for the anti-angiogenic effect, IC50(Pd2Spm/DTX) = 0.5/0.5x10-2 μM vs IC50(DTX) = 1.7x10-2 μM and IC50(Pd2Spm) = 1.6 μM. In conclusion, the reported effects of Pd2Spm on angiogenesis, migration and proliferation showed that this compound is a promising therapeutic agent against this type of breast cancer. Moreover, combined administration of Pd2Spm and DTX was found to trigger a substantial synergetic effect regarding angiogenesis inhibition as well as anti-migratory and anti-proliferative activities reinforcing the putative use of Pd(II) complexes in chemotherapeutic regimens. This is a significant outcome, aiming at the application of these combined strategies towards metastatic breast cancer (or other type of resistant cancers), justifying further studies that include pre-clinical trials.
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Affiliation(s)
| | - Paula S. C. Medeiros
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Francisco M. Costa
- Laboratory of Pharmacology, Department of Drug Science, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Vanessa P. Ribeiro
- Laboratory of Pharmacology, Department of Drug Science, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Joana B. Sousa
- Laboratory of Pharmacology, Department of Drug Science, Faculty of Pharmacy, University of Porto, Porto, Portugal
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Carmen Diniz
- Laboratory of Pharmacology, Department of Drug Science, Faculty of Pharmacy, University of Porto, Porto, Portugal
- LAQV/REQUIMTE, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Maria P. M. Marques
- Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, Coimbra, Portugal
- Department of Life Sciences, Faculty of Science and Technology, University of Coimbra, Coimbra, Portugal
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Rane LB, Kate AN, Ramteke SN, Shravage BV, Kulkarni PP, Kumbhar AA. Fluorescent zinc(ii) complexes for gene delivery and simultaneous monitoring of protein expression. Dalton Trans 2016; 45:16984-16996. [PMID: 27711702 DOI: 10.1039/c6dt02871c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Two new zinc(ii) complexes, [Zn(l-His)(NIP)]+(1) and [Zn(acac)2(NIP)](2) (where NIP is 2-(naphthalen-1-yl)-1H-imidazo[4,5-f][1,10]phenanthroline, acac = acetyl acetone), have been synthesized and characterized by elemental analysis, UV-vis, fluorescence, IR, 1H NMR and electron spray ionization mass spectroscopies. Gel retardation assay, atomic force microscopy and dynamic light scattering studies show that 1 and 2 can induce the condensation of circular plasmid pBR322 DNA into nanometer size particles under ambient conditions. Treatment of 2 with 5 mM EDTA restored 30% of the supercoiled form of DNA, revealing partial reversibility of DNA condensation. The in vitro transfection experiment demonstrates that the complexes can be used to deliver pCMV-tdTomato-N1 plasmid which expresses red fluorescent protein. The confocal studies show that the fluorescent nature of complexes is advantageous for visualizing the intracellular delivery of metal complexes as well as transfection efficiency using two distinct emission windows.
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Affiliation(s)
- Lalita B Rane
- Department of Chemistry, Savitribai Phule Pune University, Pune - 411007, India.
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Yousuf I, Arjmand F. In vitro DNA binding profile of enantiomeric dinuclear Cu(II)/Ni(II) complexes derived from l-/d-histidine-terepthaldehyde reduced Schiff base as potential chemotherapeutic agents. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 164:83-95. [PMID: 27661758 DOI: 10.1016/j.jphotobiol.2016.09.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/10/2016] [Indexed: 12/13/2022]
Abstract
New chiral reduced Schiff base ligands, L1 and L2 derived from l-/d-histidine and terepthaldehyde, and their Cu(II) and Ni(II) dinuclear complexes 1 &2 (a and b) were synthesized and thoroughly characterized by various spectroscopic techniques. Comparative binding profile of both l-/d-enantiomeric Cu(II) and Ni(II) complexes with ct-DNA was studied by employing optical and spectroscopic techniques to evaluate their enantiopreferential selectivity towards molecular target DNA and thereby explore their relative chemotherapeutic potential. Quantitative assessment of DNA binding propensity was ascertained by calculating Kb, K and Ksv values of 1 &2 (a and b) which demonstrated higher binding affinity of l-enantiomeric Cu(II) complex, 1a and followed the order as 1a>1b>2a>2b. Scanning electron microscopy (SEM) was used to analyze the morphological changes of the DNA condensate in presence of complexes 1 (a and b). The SEM micrographs condensates revealed morphological transitions and formation of different structural features implicating the condensation process between the complexes and biomolecule occurred to form compact massive structures. The gel electrophoretic assay of complex 1a was carried out with pBR322 plasmid DNA which revealed an efficient cleaving ability of the complex via oxidative pathway with the involvement of singlet oxygen (1O2) and the superoxide anion (O2•-) radicals as the ROS responsible the cleavage reactions. Molecular docking studies of 1 (a and b) with DNA revealed selective recognition of G-C residues of the narrow minor groove of the DNA duplex and complex 1a demonstrated binding affinity towards DNA ascertained from its higher binding energy values. Furthermore, the cytotoxic assessment of 1a was examined on a panel of cancer cell lines of different histological origin employing SRB assay which revealed remarkably good cytotoxic activity towards HL60, HeLa and MCF7 cancer cell lines.
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Phase Transition Detection in Accumulation of a Potential Anticancer Drug Cl-IPBD with DNA: Supercoiled and Linear pUC19 Plasmids. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Zhang Z, Zhao Y, Meng X, Zhao D, Zhang D, Wang L, Liu C. A Simple Zn2+ Complex-Based Composite System for Efficient Gene Delivery. PLoS One 2016; 11:e0158766. [PMID: 27433798 PMCID: PMC4951035 DOI: 10.1371/journal.pone.0158766] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 06/21/2016] [Indexed: 11/19/2022] Open
Abstract
Metal complexes might become a new type of promising gene delivery systems because of their low cytotoxicity, structural diversity, controllable aqua- and lipo-solubility, and appropriate density and distribution of positive charges. In this study, Zn2+ complexes (1-10) formed with a series of ligands contained benzimidazole(bzim)were prepared and characterized. They were observed to have different affinities for DNA, dependent on their numbers of positive charges, bzim groups, and coordination structures around Zn2+. The binding induced DNA to condensate into spherical nanoparticles with ~ 50 nm in diameter. The cell transfection efficiency of the DNA nanoparticles was poor, although they were low toxic. The sequential addition of the cell-penetrating peptide (CPP) TAT(48-60) and polyethylene glycol (PEG) resulted in the large DNA condensates (~ 100 nm in diameter) and the increased cellular uptake. The clathrin-mediated endocytosis was found to be a key cellular uptake pathway of the nanoparticles formed with or without TAT(48-60) or/and PEG. The DNA nanoparticles with TAT(48-60) and PEG was found to have the cell transfection efficiency up to 20% of the commercial carrier Lipofect. These results indicated that a simple Zn2+-bzim complex-based composite system can be developed for efficient and low toxic gene delivery through the combination with PEG and CPPs such as TAT.
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Affiliation(s)
- Zhe Zhang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Yanjie Zhao
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Xianggao Meng
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Dan Zhao
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Dan Zhang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Li Wang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, 430079, China
- * E-mail: (CL); (LW)
| | - Changlin Liu
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, 430079, China
- * E-mail: (CL); (LW)
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Johnson BW, Murray V, Temple MD. Characterisation of the DNA sequence specificity, cellular toxicity and cross-linking properties of novel bispyridine-based dinuclear platinum complexes. BMC Cancer 2016; 16:333. [PMID: 27225032 PMCID: PMC4880875 DOI: 10.1186/s12885-016-2368-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 05/18/2016] [Indexed: 12/21/2022] Open
Abstract
Background The anti-tumour activity of cisplatin is thought to be a result of its capacity to form DNA adducts which prevent cellular processes such as DNA replication and transcription. These DNA adducts can effectively induce cancer cell death, however, there are a range of clinical side effects and drug resistance issues associated with its use. In this study, the biological properties of three novel dinuclear platinum-based compounds (that contain alkane bridging linkers of eight, ten and twelve carbon atoms in length) were characterised to assess their potential as anticancer agents. Methods The properties of these compounds were determined using a DNA template containing seven tandem telomeric repeat sequences. A linear amplification reaction was used in combination with capillary electrophoresis to quantify the sequence specificity of DNA adducts formed by these compounds at base pair resolution. The DNA cross-linking ability of these compounds was assessed using denaturing agarose gel electrophoresis and cytotoxicity was determined in HeLa cells using a colorimetric cell viability assay. Results The dinuclear compounds were found to preferentially form DNA adducts at guanine bases and they exhibited different damage intensity profiles at the telomeric repeat sequences compared to that of cisplatin. The dinuclear compounds were found to exhibit a low level of cytotoxicity relative to cisplatin and their cytotoxicity increased as the linker length increased. Conversely, the interstrand cross-linking efficiency of the dinuclear compounds increased as the linker length decreased and the compound with the shortest alkane linker was six-fold more effective than cisplatin. Conclusions Since the bifunctional compounds exhibit variation in sequence specificity of adduct formation and a greater ability to cross-link DNA relative to cisplatin they warrant further investigation towards the goal of developing new cancer chemotherapeutic agents.
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Affiliation(s)
- Ben W Johnson
- School of Science and Health, Western Sydney University, Campbelltown, NSW, 2560, Australia
| | - Vincent Murray
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Mark D Temple
- School of Science and Health, Western Sydney University, Campbelltown, NSW, 2560, Australia.
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Johnstone TC, Suntharalingam K, Lippard SJ. The Next Generation of Platinum Drugs: Targeted Pt(II) Agents, Nanoparticle Delivery, and Pt(IV) Prodrugs. Chem Rev 2016; 116:3436-86. [PMID: 26865551 PMCID: PMC4792284 DOI: 10.1021/acs.chemrev.5b00597] [Citation(s) in RCA: 1674] [Impact Index Per Article: 209.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The platinum drugs, cisplatin, carboplatin, and oxaliplatin, prevail in the treatment of cancer, but new platinum agents have been very slow to enter the clinic. Recently, however, there has been a surge of activity, based on a great deal of mechanistic information, aimed at developing nonclassical platinum complexes that operate via mechanisms of action distinct from those of the approved drugs. The use of nanodelivery devices has also grown, and many different strategies have been explored to incorporate platinum warheads into nanomedicine constructs. In this Review, we discuss these efforts to create the next generation of platinum anticancer drugs. The introduction provides the reader with a brief overview of the use, development, and mechanism of action of the approved platinum drugs to provide the context in which more recent research has flourished. We then describe approaches that explore nonclassical platinum(II) complexes with trans geometry or with a monofunctional coordination mode, polynuclear platinum(II) compounds, platinum(IV) prodrugs, dual-threat agents, and photoactivatable platinum(IV) complexes. Nanoparticles designed to deliver platinum(IV) complexes will also be discussed, including carbon nanotubes, carbon nanoparticles, gold nanoparticles, quantum dots, upconversion nanoparticles, and polymeric micelles. Additional nanoformulations, including supramolecular self-assembled structures, proteins, peptides, metal-organic frameworks, and coordination polymers, will then be described. Finally, the significant clinical progress made by nanoparticle formulations of platinum(II) agents will be reviewed. We anticipate that such a synthesis of disparate research efforts will not only help to generate new drug development ideas and strategies, but also will reflect our optimism that the next generation of approved platinum cancer drugs is about to arrive.
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Affiliation(s)
- Timothy C Johnstone
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | | | - Stephen J Lippard
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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Four polynuclear complexes based on a versatile salicylamide salen-like ligand: Synthesis, structural variations and magnetic properties. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.09.022] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Cooperative interaction between metallosurfactants, derived from the [Ru(2,2'-bpy)3](2+) complex, and DNA. Colloids Surf B Biointerfaces 2015; 135:817-824. [PMID: 26344065 DOI: 10.1016/j.colsurfb.2015.08.052] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 08/02/2015] [Accepted: 08/27/2015] [Indexed: 12/17/2022]
Abstract
With the idea of improving and advancing the design and preparation of new reagents based on cationic surfactants for gene therapy, two luminescent metallosurfactants derived from the [Ru(2,2'-bpy)3](2+) complex were synthesized. Their interaction with DNA and the effect they exert on the conformation of the polynucleotide were studied by using different techniques. The equilibrium binding constants, Kb, of the two surfactants to DNA were obtained at different molar ratios X=[surfactant]/[DNA]. The observed sigmoidal dependence of Kb on X confirms the cooperative character of the binding. After the addition of a determined surfactant concentration, the condensation of the polymer was observed. The amount of surfactant needed to produce this conformational change is lower for the double stranded surfactant than for the single chain surfactant due to a stronger hydrophobic interaction. The addition of α-cyclodextrin molecules to the metallosurfactant/DNA solutions results in polynucleotide decompaction, which confirms the importance of the hydrophobic interactions in the condensation of the polynucleotide. Results also show the importance of choosing both a proper system to study and the most seeming measuring technique to use. It is demonstrated that, in some cases, the use of several techniques is desirable to obtain reliable and accurate results.
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Muenzner JK, Rehm T, Biersack B, Casini A, de Graaf IAM, Worawutputtapong P, Noor A, Kempe R, Brabec V, Kasparkova J, Schobert R. Adjusting the DNA Interaction and Anticancer Activity of Pt(II) N-Heterocyclic Carbene Complexes by Steric Shielding of the Trans Leaving Group. J Med Chem 2015; 58:6283-92. [DOI: 10.1021/acs.jmedchem.5b00896] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | | | | | - Angela Casini
- Department
of Pharmacokinetics, Toxicology and Targeting, Research Institute
of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Inge A. M. de Graaf
- Department
of Pharmacokinetics, Toxicology and Targeting, Research Institute
of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Pawida Worawutputtapong
- Department
of Pharmacokinetics, Toxicology and Targeting, Research Institute
of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | | | | | - Viktor Brabec
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, CZ-61265 Brno, Czech Republic
| | - Jana Kasparkova
- Department
of Biophysics, Faculty of Science, Palacky University, 17. listopadu
12, CZ-77146 Olomouc, Czech Republic
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Qiu K, Yu B, Huang H, Zhang P, Huang J, Zou S, Chen Y, Ji L, Chao H. A dendritic nano-sized hexanuclear ruthenium(II) complex as a one- and two-photon luminescent tracking non-viral gene vector. Sci Rep 2015; 5:10707. [PMID: 26185052 PMCID: PMC4505312 DOI: 10.1038/srep10707] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 04/22/2015] [Indexed: 11/16/2022] Open
Abstract
Fluorescent tracking gene delivery could provide us with a better understanding of the critical steps in the transfection process. However, for in vivo tracking applications, a small diameter (<10 nm) is one of the rigorous requirements for tracking vectors. Herein, we have demonstrated a new paradigm for two-photon tracking gene delivery based on a dendritic nano-sized hexanuclear ruthenium(II) polypyridyl complex. Because this metallodendrimer has a multivalent periphery, the complex, which is 6.1 nm, showed high stability and excellent dispersibility and could stepwise condense DNA in vitro. With the outstanding photochemical properties of Ru(II) polypyridyl, this complex could track gene delivery in vivo using one- and two-photon imaging.
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Affiliation(s)
- Kangqiang Qiu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Bole Yu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Huaiyi Huang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Pingyu Zhang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Juanjuan Huang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Shanshan Zou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Yu Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Liangnian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Hui Chao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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Malina J, Hannon MJ, Brabec V. Iron(II) supramolecular helicates condense plasmid DNA and inhibit vital DNA-related enzymatic activities. Chemistry 2015; 21:11189-95. [PMID: 26103944 DOI: 10.1002/chem.201501307] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Indexed: 11/06/2022]
Abstract
The dinuclear iron(II) supramolecular helicates [Fe2 L3 ]Cl4 (L=C25 H20 N4 ) bind to DNA through noncovalent (i.e., hydrogen-bonding, electrostatic) interactions and exhibit antimicrobial and anticancer effects. In this study, we show that the helicates condense plasmid DNA with a much higher potency than conventional DNA-condensing agents. Notably, molecules of DNA in the presence of the M enantiomer of [Fe2 L3 ]Cl4 do not form intermolecular aggregates typically formed by other condensing agents, such as spermidine or spermine. The helicates inhibit the activity of several DNA-processing enzymes, such as RNA polymerase, DNA topoisomerase I, deoxyribonuclease I, and site-specific restriction endonucleases. However, the results also indicate that the DNA condensation induced by the helicates does not play a crucial role in these inhibition reactions. The mechanisms for the inhibitory effects of [Fe2 L3 ]Cl4 helicates on DNA-related enzymatic activities have been proposed.
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Affiliation(s)
- Jaroslav Malina
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i. Kralovopolska 135, 612 65 Brno (Czech Republic)
| | - Michael J Hannon
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (UK)
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i. Kralovopolska 135, 612 65 Brno (Czech Republic).
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Moniodis JJ, Thomas DS, Davies MS, Berners-Price SJ, Farrell NP. Competitive formation of DNA linkage isomers by a trinuclear platinum complex and the influence of pre-association. Dalton Trans 2015; 44:3583-3593. [PMID: 25407024 PMCID: PMC4324329 DOI: 10.1039/c4dt02942a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
2D [(1)H, (15)N] HSQC NMR spectroscopy has been used to monitor the reaction of fully (15)N-labelled [{trans-PtCl(NH3)2}2(μ-trans-Pt(NH3)2{NH2(CH2)6NH2}2)](4+) (BBR3464 ((15)N-1)) with the 14-mer duplex (5'-{d(ATACATG(7)G(8)TACATA)}-3'·5'-{d(TATG(18)TACCATG(25)TAT)}-3' or I) at pH 5.4 and 298 K, to examine the possible formation of 1,4 and 1,5-GG adducts in both 5'-5' and 3'-3' directions. In a previous study, the binding of the dinuclear 1,1/t,t to I showed specific formation of the 5'-5' 1,4 G(8)G(18) cross-link, whereas in this case a mixture of adducts were formed. Initial (1)H NMR spectra suggested the presence of two pre-associated states aligned in both directions along the DNA. The pre-association was studied in the absence of covalent binding, by use of the "non-covalent" analog [{trans-Pt(NH3)3}2(μ-trans-Pt(NH3)2{NH2(CH2)6NH2}2)](6+) (AH44, 0). Chemical shift changes of DNA protons combined with NOE connectivities between CH2 and NH3 protons of 0 and the adenine H2 protons on I show that two different molecules of 0 are bound in the minor groove. Molecular dynamic simulations were performed to study the interaction of 0 at the two pre-association sites using charges derived from density functional theory (DFT) calculations. Structures where the central platinum is located in the minor groove and the aliphatic linkers extend into the major groove, in opposite directions, often represent the lowest energy structures of the snapshots selected. In the reaction of (15)N-1 and I, following the pre-association step, aquation occurs to give the mono aqua monochloro species 2, with a rate constant of 3.43 ± 0.03 × 10(-5) s(-1). There was evidence for two monofunctional adducts (3, 4) bound to the 3' (G8) and 5' (G7) residues and the asymmetry of the (1)H,(15)N peak for 3 suggested two conformers of the 3' adduct, aligned in different directions along the DNA. The rate constant for combined monofunctional adduct formation (0.6 ± 0.1 M(-1)) is ca. 2-fold lower for 1 compared to 1,1/t,t, whereas the rate constant for conversion of the combined monofunctional species to combined bifunctional adducts (5) (8.0 ± 0.2 × 10(-5) s(-1)) is two-fold higher.
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Affiliation(s)
- Joseph J. Moniodis
- School of Chemistry and Biochemistry, University of Western Australia, Crawley, WA 6009, Australia
| | - Donald S. Thomas
- School of Chemistry and Biochemistry, University of Western Australia, Crawley, WA 6009, Australia
| | - Murray S. Davies
- School of Chemistry and Biochemistry, University of Western Australia, Crawley, WA 6009, Australia
| | - Susan J. Berners-Price
- School of Chemistry and Biochemistry, University of Western Australia, Crawley, WA 6009, Australia
- Institute for Glycomics, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Nicholas P. Farrell
- Institute for Glycomics, Griffith University, Gold Coast, Queensland 4222, Australia
- Department of Chemistry, Virginia Commonwealth University, 1001 W. Main St., Richmond, Virginia, 23284-2006, USA
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Qu Y, Kipping RG, Farrell NP. Solution studies on DNA interactions of substitution-inert platinum complexes mediated via the phosphate clamp. Dalton Trans 2015; 44:3563-72. [PMID: 25524170 PMCID: PMC4323935 DOI: 10.1039/c4dt03237c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phosphate clamp is a distinct mode of ligand-DNA binding where the molecular recognition is manifested through ("non-covalent") hydrogen-bonding from am(m)ines of polynuclear platinum complexes to the phosphate oxygens on the oligonucleotide backbone. This third mode of DNA binding is unique to the "classical" DNA intercalators and minor groove binding agents and even the closely related covalently binding mononuclear and polynuclear drugs. 2D (1)H NMR studies on the Dickerson-Drew dodecamer (DDD, d(CGCGAATTCGCG)2) showed significant A-T contacts mainly on nucleotides A6, T7 and T8 implying a selective bridging from C9G10 in the 3' direction to C9G10 of the opposite strand. {(1)H, (15)N} HSQC NMR spectroscopy using the fully (15)N-labelled compound [{trans-Pt(NH2)3(H2N(CH2)6NH3}2μ-(H2N(CH2)6NH2)2(Pt(NH3)2](8+) (TriplatinNC) showed at pH 6 significant chemical shifts and (1)J((195)Pt-(15)N) coupling constants for the free drug and DDD-TriplatinNC at pH 7 indicative of formation of the phosphate clamp. (31)P NMR results are also reported for the hexamer d(CGTACG)2 showing changes in (31)P NMR chemical shifts indicative of changes around the phosphorus center. The studies confirm the DNA binding modes by substitution-inert (non-covalent) polynuclear platinum complexes and help in further establishing the chemotype as a new class of potential anti-tumour agents in their own right with a distinct profile of biological activity.
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Affiliation(s)
- Y Qu
- Department of Chemistry, Virginia Commonwealth University, 1001 W. Main St., Richmond, VA 23284-2006, USA.
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50
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Yu B, Ouyang C, Qiu K, Zhao J, Ji L, Chao H. Lipophilic Tetranuclear Ruthenium(II) Complexes as Two-Photon Luminescent Tracking Non-Viral Gene Vectors. Chemistry 2015; 21:3691-700. [DOI: 10.1002/chem.201405151] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Indexed: 12/16/2022]
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