1
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Gorle AK, Malde AK, Chang CW, Rajaratnam P, von Itzstein M, Berners-Price SJ, Farrell NP. Probing Disaccharide Binding to Triplatin as Models for Tumor Cell Heparan Sulfate (GAG) Interactions. Inorg Chem 2023; 62:13212-13220. [PMID: 37552525 PMCID: PMC10445638 DOI: 10.1021/acs.inorgchem.3c01391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Indexed: 08/09/2023]
Abstract
In this study, we have used [1H, 15N] NMR spectroscopy to investigate the interactions of the trinuclear platinum anticancer drug triplatin (1) (1,0,1/t,t,t or BBR3464) with site-specific sulfated and carboxylated disaccharides. Specifically, the disaccharides GlcNS(6S)-GlcA (I) and GlcNS(6S)-IdoA(2S) (II) are useful models of longer-chain glycosaminoglycans (GAGs) such as heparan sulfate (HS). For both the reactions of 15N-1 with I and II, equilibrium conditions were achieved more slowly (65 h) compared to the reaction with the monosaccharide GlcNS(6S) (9 h). The data suggest both carboxylate and sulfate binding of disaccharide I to the Pt with the sulfato species accounting for <1% of the total species at equilibrium. The rate constant for sulfate displacement of the aqua ligand (kL2) is 4 times higher than the analogous rate constant for carboxylate displacement (kL1). There are marked differences in the equilibrium concentrations of the chlorido, aqua, and carboxy-bound species for reactions with the two disaccharides, notably a significantly higher concentration of carboxylate-bound species for II, where sulfate-bound species were barely detectable. The trend mirrors that reported for the corresponding dinuclear platinum complex 1,1/t,t, where the rate constant for sulfate displacement of the aqua ligand was 3 times higher than that for acetate. Also similar to what we observed for the reactions of 1,1/t,t with the simple anions, aquation of the sulfato group is rapid, and the rate constant k-L2 is 3 orders of magnitude higher than that for displacement of the carboxylate (k-L1). Molecular dynamics calculations suggest that extra hydrogen-bonding interactions with the more sulfated disaccharide II may prevent or diminish sulfate binding of the triplatin moiety. The overall results suggest that Pt-O donor interactions should be considered in any full description of platinum complex cellular chemistry.
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Affiliation(s)
- Anil K. Gorle
- Institute
for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia
| | - Alpeshkumar K. Malde
- Institute
for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia
| | - Chih-Wei Chang
- Institute
for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia
| | - Premraj Rajaratnam
- Institute
for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia
| | - Mark von Itzstein
- Institute
for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia
| | - Susan J. Berners-Price
- Institute
for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia
| | - Nicholas P. Farrell
- Institute
for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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2
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Rosa NMP, Ferreira FHDC, Farrell NP, Costa LAS. Substitution-inert polynuclear platinum complexes and Glycosaminoglycans: A molecular dynamics study of its non-covalent interactions. J Inorg Biochem 2022; 232:111811. [DOI: 10.1016/j.jinorgbio.2022.111811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/17/2022] [Accepted: 03/25/2022] [Indexed: 10/18/2022]
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3
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Simon J, Horstmann Née Gruschka C, Mix A, Stammler A, Oldengott J, Bögge H, Glaser T. Evaluation of the binding mode of a cytotoxic dinuclear nickel complex to two neighboring phosphates of the DNA backbone. Dalton Trans 2022; 51:2863-2875. [PMID: 35098951 DOI: 10.1039/d1dt03813c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A family of dinuclear complexes based on 2,7-disubstituted 1,8-naphthalenediol-ligands has been designed to bind covalently to two neighboring phosphate diester groups in the backbone of DNA. The dinuclear CuII and NiII complexes bind to DNA resulting in the inhibition of DNA synthesis in PCR experiments and in a cytotoxicity that is stronger for human cancer cells than for human stem cells of the same proliferation rate. These experiments support but cannot prove that the dinuclear complexes bind as intended to two neighboring phosphate ester groups of the DNA backbone. Here, we evaluate the potential binding mode of the cytotoxic dinuclear NiII complex using simple phosphate diester models (dimethyl phosphate and diphenyl phosphate). Depending on the reaction conditions, the phosphate diesters bind to the NiII ions in a bridging or in a terminal coordination mode. The latter occurs by substitution of two coordinated acetates by the phosphate diesters. This reaction has been followed by NMR spectroscopy, which demonstrates that the substitution of acetate by phosphate is thermodynamically strongly favored, while the exchange with excess phosphate is fast on the NMR time scale. The molecular structure of the NiII complex with two coordinated diphenyl phosphates served as a model for the computational evaluation of the binding to the DNA backbone. This combined experimental and computational study suggests a monodentate coordination mode of the DNA phosphate diesters to the NiII ions that is assisted by hydrogen bonds with water ligands.
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Affiliation(s)
- Jasmin Simon
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany.
| | - Claudia Horstmann Née Gruschka
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany.
| | - Andreas Mix
- Lehrstuhl für Anorganische Chemie und Strukturchemie, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany
| | - Anja Stammler
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany.
| | - Jan Oldengott
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany.
| | - Hartmut Bögge
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany.
| | - Thorsten Glaser
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany.
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4
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Kinzhalov MA, Luzyanin KV. Synthesis and Contemporary Applications of Platinum Group Metals Complexes with Acyclic Diaminocarbene Ligands (Review). RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622010065] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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5
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Bailly B, Gorle AK, Dirr L, Malde AK, Farrell NP, Berners-Price SJ, von Itzstein M. Platinum complexes act as shielding agents against virus infection. Chem Commun (Camb) 2021; 57:4666-4669. [PMID: 33977992 DOI: 10.1039/d1cc01593a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We determine that the substitution-inert polynuclear platinum complex (PPC) TriplatinNC is an antiviral agent and protects cells from enterovirus 71 and human metapneumovirus infection. This protection occurs through the formation of adducts with cell-surface glycosaminoglycans. Our detailed mechanistic investigation demonstrates that TriplatinNC blocks viral entry by shielding cells from virus attack, opening new directions for metalloshielding antiviral drug development.
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Affiliation(s)
- Benjamin Bailly
- Institute for Glycomics, Griffith University Gold Coast Campus, Southport, Queensland, Australia.
| | - Anil K Gorle
- Institute for Glycomics, Griffith University Gold Coast Campus, Southport, Queensland, Australia.
| | - Larissa Dirr
- Institute for Glycomics, Griffith University Gold Coast Campus, Southport, Queensland, Australia.
| | - Alpeshkumar K Malde
- Institute for Glycomics, Griffith University Gold Coast Campus, Southport, Queensland, Australia.
| | - Nicholas P Farrell
- Institute for Glycomics, Griffith University Gold Coast Campus, Southport, Queensland, Australia. and Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA
| | - Susan J Berners-Price
- Institute for Glycomics, Griffith University Gold Coast Campus, Southport, Queensland, Australia.
| | - Mark von Itzstein
- Institute for Glycomics, Griffith University Gold Coast Campus, Southport, Queensland, Australia.
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6
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Abstract
Platinum (Pt) compounds entered the clinic as anticancer agents when cisplatin was approved in 1978. More than 40 years later, even in the era of precision medicine and immunotherapy, Pt drugs remain among the most widely used anticancer drugs. As Pt drugs mainly target DNA, it is not surprising that recent insights into alterations of DNA repair mechanisms provide a useful explanation for their success. Many cancers have defective DNA repair, a feature that also sheds new light on the mechanisms of secondary drug resistance, such as the restoration of DNA repair pathways. In addition, genome-wide functional screening approaches have revealed interesting insights into Pt drug uptake. About half of cisplatin and carboplatin but not oxaliplatin may enter cells through the widely expressed volume-regulated anion channel (VRAC). The analysis of this heteromeric channel in tumour biopsies may therefore be a useful biomarker to stratify patients for initial Pt treatments. Moreover, Pt-based approaches may be improved in the future by the optimization of combinations with immunotherapy, management of side effects and use of nanodelivery devices. Hence, Pt drugs may still be part of the standard of care for several cancers in the coming years.
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Affiliation(s)
- Sven Rottenberg
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Bern Center for Precision Medicine, University of Bern, Bern, Switzerland
| | - Carmen Disler
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Paola Perego
- Molecular Pharmacology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.
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7
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Malina J, Kostrhunova H, Farrell NP, Brabec V. Antitumor substitution-inert polynuclear platinum complexes stabilize G-quadruplex DNA and suppress G-quadruplex-mediated gene expression. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00488c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Anticancer substitution-inert polynuclear platinum(ii) complexes (SI-PPCs) effectively stabilize DNA G-quadruplexes (G4) and terminate DNA polymerization on templates containing G4-forming sequences.
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Affiliation(s)
- Jaroslav Malina
- Czech Academy of Sciences
- Institute of Biophysics
- CZ-61265 Brno
- Czech Republic
| | - Hana Kostrhunova
- Czech Academy of Sciences
- Institute of Biophysics
- CZ-61265 Brno
- Czech Republic
| | | | - Viktor Brabec
- Czech Academy of Sciences
- Institute of Biophysics
- CZ-61265 Brno
- Czech Republic
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8
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Malina J, Farrell NP, Brabec V. Substitution-Inert Polynuclear Platinum Complexes Inhibit Reverse Transcription Preferentially in RNA Triplex-Forming Templates. Inorg Chem 2020; 59:15135-15143. [PMID: 32988198 DOI: 10.1021/acs.inorgchem.0c02070] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
RNA triplexes are significant tertiary structure motifs that are found in many functional RNAs. Hence, small molecules capable of recognition, binding, and stabilization of the triple-helical RNA structures are emerging as attractive potential molecular biology tools and therapeutic agents. Here, we utilize methods of molecular biology and biophysics to study the interactions of a series of antitumor substitution-inert polynuclear platinum complexes (SI-PPCs) with triple-helical RNA structures. We show that SI-PPCs recognize and stabilize RNA triplexes and inhibit reverse transcription preferentially in the RNA template prone to the triplex formation. These so far unexplored properties of SI-PPCs suggest that the targeting of triple-stranded regions in RNA might contribute to the biological effects of SI-PPCs.
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Affiliation(s)
- Jaroslav Malina
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, Brno CZ-61265, 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, Brno CZ-61265, Czech Republic
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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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Surin M, Ulrich S. From Interaction to Function in DNA-Templated Supramolecular Self-Assemblies. ChemistryOpen 2020; 9:480-498. [PMID: 32328404 PMCID: PMC7175023 DOI: 10.1002/open.202000013] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/24/2020] [Indexed: 12/13/2022] Open
Abstract
DNA-templated self-assembly represents a rich and growing subset of supramolecular chemistry where functional self-assemblies are programmed in a versatile manner using nucleic acids as readily-available and readily-tunable templates. In this review, we summarize the different DNA recognition modes and the basic supramolecular interactions at play in this context. We discuss the recent results that report the DNA-templated self-assembly of small molecules into complex yet precise nanoarrays, going from 1D to 3D architectures. Finally, we show their emerging functions as photonic/electronic nanowires, sensors, gene delivery vectors, and supramolecular catalysts, and their growing applications in a wide range of area from materials to biological sciences.
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Affiliation(s)
- Mathieu Surin
- Laboratory for Chemistry of Novel MaterialsCenter of Innovation and Research in Materials and Polymers (CIRMAP)University of Mons-UMONS7000MonsBelgium
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11
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Serebryanskaya TV, Kinzhalov MA, Bakulev V, Alekseev G, Andreeva A, Gushchin PV, Protas AV, Smirnov AS, Panikorovskii TL, Lippmann P, Ott I, Verbilo CM, Zuraev AV, Bunev AS, Boyarskiy VP, Kasyanenko NA. Water soluble palladium(ii) and platinum(ii) acyclic diaminocarbene complexes: solution behavior, DNA binding, and antiproliferative activity. NEW J CHEM 2020. [DOI: 10.1039/d0nj00060d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Water soluble Pd(ii) and Pt(ii)–ADC species synthesized via the metal-mediated coupling of isocyanides and 1,2-diaminobenzene have demonstrated antitumor potential.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Taras L. Panikorovskii
- Saint Petersburg State University
- St. Petersburg
- Russia
- Laboratory of Nature-Inspired Technologies and Environmental Safety of the Arctic
- Kola Science Centre
| | - Petra Lippmann
- Institute of Medicinal and Pharmaceutical Chemistry
- Technische Universität Braunschweig
- D-38106 Braunschweig
- Germany
| | - Ingo Ott
- Institute of Medicinal and Pharmaceutical Chemistry
- Technische Universität Braunschweig
- D-38106 Braunschweig
- Germany
| | - Cyril M. Verbilo
- Research Institute for Physical Chemical Problems
- Belarusian State University
- 220006 Minsk
- Belarus
| | - Alexander V. Zuraev
- Research Institute for Physical Chemical Problems
- Belarusian State University
- 220006 Minsk
- Belarus
| | - Alexander S. Bunev
- Medicinal Chemistry Center
- Togliatti State University
- 445020 Togliatti
- Russia
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12
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Bhayani JA, Hill BL, Sharma A, Iglesias AA, Olsen KW, Ballicora MA. Mapping of a Regulatory Site of the Escherichia coli ADP-Glucose Pyrophosphorylase. Front Mol Biosci 2019; 6:89. [PMID: 31608288 PMCID: PMC6773804 DOI: 10.3389/fmolb.2019.00089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 09/06/2019] [Indexed: 11/13/2022] Open
Abstract
The enzyme ADP-glucose pyrophosphorylase (ADP-Glc PPase) controls the biosynthesis of glycogen in bacteria and starch in plants. It is regulated by various activators in different organisms according to their metabolic characteristics. In Escherichia coli, the major allosteric activator is fructose 1,6-bisphosphate (FBP). Other potent activator analogs include 1,6-hexanediol bisphosphate (HBP) and pyridoxal 5'-phosphate (PLP). Recently, a crystal structure with FBP bound was reported (PDB ID: 5L6S). However, it is possible that the FBP site found is not directly responsible for the activation of the enzyme. We hypothesized FBP activates by binding one of its phosphate groups to another site ("P1") in which a sulfate molecule was observed. In the E. coli enzyme, Arg40, Arg52, and Arg386 are part of this "P1" pocket and tightly complex this sulfate, which is also present in the crystal structures of ADP-Glc PPases from Agrobacterium tumefaciens and Solanum tuberosum. To test this hypothesis, we modeled alternative binding conformations of FBP, HBP, and PLP into "P1." In addition, we performed a scanning mutagenesis of Arg residues near potential phosphate binding sites ("P1," "P2," "P3"). We found that Arg40 and Arg52 are essential for FBP and PLP binding and activation. In addition, mutation of Arg386 to Ala decreased the apparent affinity for the activators more than 35-fold. We propose that the activator binds at this "P1" pocket, as well as "P2." Arg40 and Arg52 are highly conserved residues and they may be a common feature to complex the phosphate moiety of different sugar phosphate activators in the ADP-Glc PPase family.
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Affiliation(s)
- Jaina A. Bhayani
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL, United States
| | - Benjamin L. Hill
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL, United States
| | - Anisha Sharma
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL, United States
| | - Alberto A. Iglesias
- Laboratorio de Enzimología Molecular, Instituto de Agrobiotecnología del Litoral (UNL-CONICET), CCT CONICET, Santa Fe, Argentina
| | - Kenneth W. Olsen
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL, United States
| | - Miguel A. Ballicora
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL, United States
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13
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Eskandari A, Kundu A, Ghosh S, Suntharalingam K. A Triangular Platinum(II) Multinuclear Complex with Cytotoxicity Towards Breast Cancer Stem Cells. Angew Chem Int Ed Engl 2019; 58:12059-12064. [DOI: 10.1002/anie.201905389] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Arvin Eskandari
- Department of ChemistryKing's College London London SE1 1DB UK
| | - Arunangshu Kundu
- Department of ChemistryGauhati University Guwahati Assam 781014 India
| | - Sushobhan Ghosh
- Department of ChemistryGauhati University Guwahati Assam 781014 India
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14
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Eskandari A, Kundu A, Ghosh S, Suntharalingam K. A Triangular Platinum(II) Multinuclear Complex with Cytotoxicity Towards Breast Cancer Stem Cells. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905389] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Arvin Eskandari
- Department of ChemistryKing's College London London SE1 1DB UK
| | - Arunangshu Kundu
- Department of ChemistryGauhati University Guwahati Assam 781014 India
| | - Sushobhan Ghosh
- Department of ChemistryGauhati University Guwahati Assam 781014 India
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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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16
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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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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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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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Gorle AK, Zhang J, Liu Q, Berners‐Price SJ, Farrell NP. Structural Factors Affecting Binding of Platinum Anticancer Agents with Phospholipids: Influence of Charge and Phosphate Clamp Formation. Chemistry 2018; 24:4643-4652. [DOI: 10.1002/chem.201705822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Anil Kumar Gorle
- Institute for Glycomics Griffith University, Gold Coast Campus Southport Queensland 4222 Australia
| | - Junyong Zhang
- School of Biomedical, Biomolecular & Chemical Sciences University of Western Australia Crawley WA 6009 Australia
- Present address: College of Biological Chemical Science and Engineering, Jiaxing University Jiaxing 314001 P. R. China
| | - Qin Liu
- Department of Chemistry and The Massey Cancer Center Virginia Commonwealth University Richmond 23284 Virginia USA
- Present address: College of Food Science and Engineering Nanjing University of Finance and Economics Nanjing 210023 P. R. China
| | - Susan J. Berners‐Price
- Institute for Glycomics Griffith University, Gold Coast Campus Southport Queensland 4222 Australia
- School of Biomedical, Biomolecular & Chemical Sciences University of Western Australia Crawley WA 6009 Australia
| | - Nicholas P. Farrell
- Institute for Glycomics Griffith University, Gold Coast Campus Southport Queensland 4222 Australia
- Department of Chemistry and The Massey Cancer Center Virginia Commonwealth University Richmond 23284 Virginia USA
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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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23
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Kolodziej A, Figueiredo MC, Koper MT, Fernandez-Trillo F, Rodriguez P. Phosphate-mediated electrochemical adsorption of cisplatin on gold electrodes. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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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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Marques MPM, Batista de Carvalho ALM, Sakai VG, Hatter L, Batista de Carvalho LAE. Intracellular water – an overlooked drug target? Cisplatin impact in cancer cells probed by neutrons. Phys Chem Chem Phys 2017; 19:2702-2713. [DOI: 10.1039/c6cp05198g] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Intracellular water as a secondary pharmacological target?
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Affiliation(s)
- M. P. M. Marques
- Unidade de I&D Química-Física Molecular
- Dep. of Chemistry
- R. Larga
- Univ. Coimbra
- 3004-535 Coimbra
| | | | - V. Garcia Sakai
- ISIS Facility
- STFC Rutherford Appleton Laboratory
- Chilton
- Didcot
- UK
| | - L. Hatter
- Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Chilton
- Didcot
- UK
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Peterson EJ, Daniel AG, Katner SJ, Bohlmann L, Chang CW, Bezos A, Parish CR, von Itzstein M, Berners-Price SJ, Farrell NP. Antiangiogenic platinum through glycan targeting. Chem Sci 2017; 8:241-252. [PMID: 28451171 PMCID: PMC5355868 DOI: 10.1039/c6sc02515c] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 08/12/2016] [Indexed: 01/17/2023] Open
Abstract
Heparan sulfate is identified as a ligand receptor for polynuclear platinum anti-cancer agents through sulfate cluster binding. We present a new biological role for platinum and coordination compounds and a new target for metal-based drugs while presenting a new chemotype for heparanase and growth factor inhibition through modulation (metalloshielding) of their interactions. Masking of extracellular (ECM)-resident heparan sulfate (HS) through metalloshielding results in very effective inhibition of physiologically critical HS functions including enzyme (heparanase, HPSE) and protein growth factor recognition. The interaction of the highly cationic polynuclear platinum complexes (PPCs) with the highly sulfated pentasaccharide Fondaparinux (FPX, in this case as a model HS-like substrate) results in inhibition of its cleavage by the HS-related enzyme heparanase. Binding of the fibroblast growth factor FGF-2 to HS is also inhibited with consequences for downstream signalling events as measured by a reduction in accumulation of phospho-S6 ribosomal protein in human colon tumor HCT-116 cells. The end-point of inhibition of HPSE activity and growth factor growth factor signaling is the prevention of cell invasion and angiogenesis. Finally these events culminate in inhibition of HCT-116 cell invasion at sub-cytotoxic concentrations and the process of angiogenesis. A competition assay shows that Fondaparinux can sequester the 8+ TriplatinNC from bound DNA, emphasising the strength of PPC-HS interactions. Altering the profile of platinum agents from cytotoxic to anti-metastatic has profound implications for future directions in the development of platinum-based chemotherapeutics.
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Affiliation(s)
- Erica J Peterson
- Department of Chemistry , Virginia Commonwealth University , Richmond VA 23284 , Virginia , USA .
- The Massey Cancer Center , Virginia Commonwealth University , Richmond 23294 , Virginia , USA
| | - A Gerard Daniel
- Department of Chemistry , Virginia Commonwealth University , Richmond VA 23284 , Virginia , USA .
- The Massey Cancer Center , Virginia Commonwealth University , Richmond 23294 , Virginia , USA
| | - Samantha J Katner
- Department of Chemistry , Virginia Commonwealth University , Richmond VA 23284 , Virginia , USA .
- The Massey Cancer Center , Virginia Commonwealth University , Richmond 23294 , Virginia , USA
| | - Lisa Bohlmann
- Institute for Glycomics , Griffith University , Gold Coast Campus , Southport , Queensland 4222 , Australia
| | - Chih-Wei Chang
- Institute for Glycomics , Griffith University , Gold Coast Campus , Southport , Queensland 4222 , Australia
| | - Anna Bezos
- John Curtin School of Medical Research , The Australian National University , Canberra , Australia
| | - Christopher R Parish
- John Curtin School of Medical Research , The Australian National University , Canberra , Australia
| | - Mark von Itzstein
- Institute for Glycomics , Griffith University , Gold Coast Campus , Southport , Queensland 4222 , Australia
| | - Susan J Berners-Price
- Institute for Glycomics , Griffith University , Gold Coast Campus , Southport , Queensland 4222 , Australia
| | - Nicholas P Farrell
- Department of Chemistry , Virginia Commonwealth University , Richmond VA 23284 , Virginia , USA .
- The Massey Cancer Center , Virginia Commonwealth University , Richmond 23294 , Virginia , USA
- Institute for Glycomics , Griffith University , Gold Coast Campus , Southport , Queensland 4222 , Australia
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Jastrząb R, Łomozik L, Tylkowski B. Complexes of biogenic amines in their role in living systems. PHYSICAL SCIENCES REVIEWS 2016. [DOI: 10.1515/psr-2016-0003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Rubio-Magnieto J, Kumar M, Brocorens P, Idé J, George SJ, Lazzaroni R, Surin M. Chiral supramolecular organization and cooperativity in DNA-templated assemblies of ZnII–chromophore complexes. Chem Commun (Camb) 2016; 52:13873-13876. [DOI: 10.1039/c6cc07414f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Templated cooperative binding induced assembly of chromophores is achieved via interactions between Zn-complexes and the DNA phosphodiester backbone.
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Affiliation(s)
- Jenifer Rubio-Magnieto
- Laboratory for Chemistry of Novel Materials
- Center for Innovation in Materials and Polymers
- University of Mons – UMONS
- B-7000 Mons
- Belgium
| | - Mohit Kumar
- Supramolecular Chemistry Laboratory
- New Chemistry Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR)
- Bangalore
- India
| | - Patrick Brocorens
- Laboratory for Chemistry of Novel Materials
- Center for Innovation in Materials and Polymers
- University of Mons – UMONS
- B-7000 Mons
- Belgium
| | - Julien Idé
- Laboratory for Chemistry of Novel Materials
- Center for Innovation in Materials and Polymers
- University of Mons – UMONS
- B-7000 Mons
- Belgium
| | - Subi J. George
- Supramolecular Chemistry Laboratory
- New Chemistry Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR)
- Bangalore
- India
| | - Roberto Lazzaroni
- Laboratory for Chemistry of Novel Materials
- Center for Innovation in Materials and Polymers
- University of Mons – UMONS
- B-7000 Mons
- Belgium
| | - Mathieu Surin
- Laboratory for Chemistry of Novel Materials
- Center for Innovation in Materials and Polymers
- University of Mons – UMONS
- B-7000 Mons
- Belgium
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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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Farrell NP. Multi-platinum anti-cancer agents. Substitution-inert compounds for tumor selectivity and new targets. Chem Soc Rev 2015; 44:8773-85. [DOI: 10.1039/c5cs00201j] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Substitution-inert polynuclear platinum complexes are inherently dual-function anti-cancer agents combining extra and intra-cellular effects in one structural chemotype.
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Affiliation(s)
- N. P. Farrell
- Department of Chemistry
- Virginia Commonwealth University
- Richmond
- USA
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Prisecaru A, Molphy Z, Kipping RG, Peterson EJ, Qu Y, Kellett A, Farrell NP. The phosphate clamp: sequence selective nucleic acid binding profiles and conformational induction of endonuclease inhibition by cationic Triplatin complexes. Nucleic Acids Res 2014; 42:13474-87. [PMID: 25414347 PMCID: PMC4267626 DOI: 10.1093/nar/gku1157] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 10/28/2014] [Accepted: 10/29/2014] [Indexed: 01/27/2023] Open
Abstract
The substitution-inert polynuclear platinum(II) complex (PPC) series, [{trans-Pt(NH3)2(NH2(CH2)nNH3)}2-μ-(trans-Pt(NH3)2(NH2(CH2)nNH2)2}](NO3)8, where n = 5 (AH78P), 6 (AH78 TriplatinNC) and 7 (AH78H), are potent non-covalent DNA binding agents where nucleic acid recognition is achieved through use of the 'phosphate clamp' where the square-planar tetra-am(m)ine Pt(II) coordination units all form bidentate N-O-N complexes through hydrogen bonding with phosphate oxygens. The modular nature of PPC-DNA interactions results in high affinity for calf thymus DNA (Kapp ∼5 × 10(7) M(-1)). The phosphate clamp-DNA interactions result in condensation of superhelical and B-DNA, displacement of intercalated ethidium bromide and facilitate cooperative binding of Hoechst 33258 at the minor groove. The effect of linker chain length on DNA conformational changes was examined and the pentane-bridged complex, AH78P, was optimal for condensing DNA with results in the nanomolar region. Analysis of binding affinity and conformational changes for sequence-specific oligonucleotides by ITC, dialysis, ICP-MS, CD and 2D-(1)H NMR experiments indicate that two limiting modes of phosphate clamp binding can be distinguished through their conformational changes and strongly suggest that DNA condensation is driven by minor-groove spanning. Triplatin-DNA binding prevents endonuclease activity by type II restriction enzymes BamHI, EcoRI and SalI, and inhibition was confirmed through the development of an on-chip microfluidic protocol.
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Affiliation(s)
- Andreea Prisecaru
- 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
| | - Ralph G. Kipping
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA
| | - Erica J. Peterson
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA
| | - Yun Qu
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA
| | - Andrew Kellett
- School of Chemical Sciences and National Institute for Cellular Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Nicholas P. Farrell
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA
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Malina J, Farrell NP, Brabec V. Substitution-inert trinuclear platinum complexes efficiently condense/aggregate nucleic acids and inhibit enzymatic activity. Angew Chem Int Ed Engl 2014; 53:12812-6. [PMID: 25256921 PMCID: PMC4311996 DOI: 10.1002/anie.201408012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 09/08/2014] [Indexed: 01/02/2023]
Abstract
The trinuclear platinum complexes (TriplatinNC-A [{Pt(NH3 )3 }2 -μ-{trans-Pt(NH3 )2 (NH2 (CH2 )6 NH2 )2 }](6+) , and TriplatinNC [{trans-Pt(NH3 )2 (NH2 (CH2 )6 NH3 (+) )}2 -μ-{trans-Pt(NH3 )2 (NH2 (CH2 )6 NH2 )2 }](8+) ) are biologically active agents that bind to DNA through noncovalent (hydrogen bonding, electrostatic) interactions. Herein, we show that TriplatinNC condenses DNA with a much higher potency than conventional DNA condensing agents. Both complexes induce aggregation of small transfer RNA molecules, and TriplatinNC in particular completely inhibits DNA transcription at lower concentrations than naturally occurring spermine. Topoisomerase I-mediated relaxation of supercoiled DNA was inhibited by TriplatinNC-A and TriplatinNC at concentrations which were 60 times and 250 times lower than that of spermine. The mechanisms for the biological activity of TriplatinNC-A and TriplatinNC may be associated with their ability to condense/aggregate nucleic acids with consequent inhibitory effects on crucial enzymatic activities.
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Affiliation(s)
- Jaroslav Malina
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., 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, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-61265 Brno (Czech Republic)
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Mangrum JB, Engelmann BJ, Peterson EJ, Ryan JJ, Berners-Price SJ, Farrell NP. A new approach to glycan targeting: enzyme inhibition by oligosaccharide metalloshielding. Chem Commun (Camb) 2014; 50:4056-8. [PMID: 24463939 DOI: 10.1039/c3cc49695c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metalloglycomics - the effects of defined coordination compounds on oligosaccharides and their structure and function - opens new areas for bioinorganic chemistry and expands its systematic study to the third major class of biomolecules after DNA/RNA and proteins.
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Affiliation(s)
- John B Mangrum
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, USA.
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Paolantoni D, Rubio-Magnieto J, Cantel S, Martinez J, Dumy P, Surin M, Ulrich S. Probing the importance of π-stacking interactions in DNA-templated self-assembly of bisfunctionalized guanidinium compounds. Chem Commun (Camb) 2014; 50:14257-60. [DOI: 10.1039/c4cc05706f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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37
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Malina J, Farrell NP, Brabec V. Substitution-Inert Trinuclear Platinum Complexes Efficiently Condense/Aggregate Nucleic Acids and Inhibit Enzymatic Activity. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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38
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Ma ESF, Daniel AG, Farrell NP. Dinuclear platinum complexes containing planar aromatic ligands to enhance stacking interactions with proteins. ChemMedChem 2014; 9:1155-60. [PMID: 24801050 DOI: 10.1002/cmdc.201402052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Indexed: 11/09/2022]
Abstract
In an approach to design drugs with higher affinity for π-π stacking and electrostatic interactions with targeted biomolecules, complexes of the type [{cis-Pt(A)2 (L)}2 -μ-{trans-1,4-dach}](NO3 )4 ((A)2 =(NH3 )2 or ethylenediamine (en), L=quinoline (quin) or benzothiazole (bztz), dach=trans-1,4-diaminocyclohexane) were synthesized. The quinoline complex, [{cis-Pt(en)(quin)}2 -μ-(dach)](NO3 )4 (9) was synthesized from the precursor K[PtCl3 (quin)] (1), while the benzothiazole complexes, [{cis-Pt(A)2 (bztz)}2 -μ-(dach)](NO3 )4 ((A)2 =(NH3 )2 (10) and (A)2 =en (11)) were synthesized from the precursors cis-[Pt(A)2 Cl(bztz)] ((A)2 =(NH3 )2 (7) and (A)2 =en (8)). Their interactions with N-acetyltryptophan and a model pentapeptide (N-Ac-WLDSW-OH), modeled on the pentapeptide recognition sequence (FSDLW) of p53-mdm2 interaction, were examined by fluorescence spectroscopy. The dinuclear complexes were found to be significantly stronger at quenching the fluorescence of tryptophan than their mononuclear Pt-based analogues indicating stronger binding. Molecular modeling suggests a "sandwich" mode of binding, and the flexibility of the dinuclear motif can allow the design of more selective and stronger-binding complexes. Based on these results a further prototype, [{Pt(en)(9-EtGua)}2 μ-H2 N(CH2 )6 NH2 ](4+) , incorporating the purine 9-ethylguanine (9-EtG) as a stacking moiety, was prepared which showed good cytotoxicity in A2780 and OsACL tumor cell lines.
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Affiliation(s)
- Erin S F Ma
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, VA 23284-2006 (USA)
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39
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Malina J, Farrell NP, Brabec V. DNA Condensing Effects and Sequence Selectivity of DNA Binding of Antitumor Noncovalent Polynuclear Platinum Complexes. Inorg Chem 2014; 53:1662-71. [DOI: 10.1021/ic402796k] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jaroslav Malina
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i.,
Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Nicholas P. Farrell
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Viktor Brabec
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i.,
Kralovopolska 135, CZ-61265 Brno, Czech Republic
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40
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Phongtongpasuk S, Paulus S, Schnabl J, Sigel RKO, Spingler B, Hannon MJ, Freisinger E. Binding of a Designed Anti-Cancer Drug to the Central Cavity of an RNA Three-Way Junction. Angew Chem Int Ed Engl 2013; 52:11513-6. [DOI: 10.1002/anie.201305079] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Indexed: 11/08/2022]
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41
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Phongtongpasuk S, Paulus S, Schnabl J, Sigel RKO, Spingler B, Hannon MJ, Freisinger E. Binding of a Designed Anti-Cancer Drug to the Central Cavity of an RNA Three-Way Junction. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305079] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Gamba I, Salvadó I, Rama G, Bertazzon M, Sánchez MI, Sánchez-Pedregal VM, Martínez-Costas J, Brissos RF, Gamez P, Mascareñas JL, Vázquez López M, Vázquez ME. Custom-fit ruthenium(II) metallopeptides: a new twist to DNA binding with coordination compounds. Chemistry 2013; 19:13369-75. [PMID: 23943195 DOI: 10.1002/chem.201301629] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Indexed: 12/20/2022]
Abstract
A new bipyridine building block has been used for the solid-phase synthesis of dinuclear DNA-binding ruthenium(II) metallopeptides. Detailed spectroscopic studies suggest that these compounds bind to the DNA by insertion into the DNA minor groove. Moreover, the potential of the solid-phase peptide synthesis approach is demonstrated by the straightforward synthesis of an octaarginine derivative that shows effective cellular internalization and cytotoxicity linked with strong DNA interaction, as evidenced by steady-state fluorescence spectroscopy and AFM studies.
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Affiliation(s)
- Ilaria Gamba
- Departamento de Química Inorgánica y Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain)
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43
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Platinum and Palladium Polyamine Complexes as Anticancer Agents: The Structural Factor. ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/287353] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Since the introduction of cisplatin to oncology in 1978, Pt(II) and Pd(II) compounds have been intensively studied with a view to develop the improved anticancer agents. Polynuclear polyamine complexes, in particular, have attracted special attention, since they were found to yield DNA adducts not available to conventional drugs (through long-distance intra- and interstrand cross-links) and to often circumvent acquired cisplatin resistance. Moreover, the cytotoxic potency of these polyamine-bridged chelates is strictly regulated by their structural characteristics, which renders this series of compounds worth investigating and their synthesis being carefully tailored in order to develop third-generation drugs coupling an increased spectrum of activity to a lower toxicity. The present paper addresses the latest developments in the design of novel antitumor agents based on platinum and palladium, particularly polynuclear chelates with variable length aliphatic polyamines as bridging ligands, highlighting the close relationship between their structural preferences and cytotoxic ability. In particular, studies by vibrational spectroscopy techniques are emphasised, allowing to elucidate the structure-activity relationships (SARs) ruling anticancer activity.
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44
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Silva H, Frézard F, Peterson EJ, Kabolizadeh P, Ryan JJ, Farrell NP. Heparan sulfate proteoglycan-mediated entry pathway for charged tri-platinum compounds: differential cellular accumulation mechanisms for platinum. Mol Pharm 2012; 9:1795-802. [PMID: 22494465 DOI: 10.1021/mp300098t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We examined the mechanism of accumulation of charged polynuclear platinum complexes (PPCs) based on analogy of polyarginine interactions with the cell surface heparan sulfate proteoglycan (HSPG) family of protein-linked glycosoaminoglycan polysaccharides (GAGs). GAGS such as heparan sulfate (HS) and chondroitin sulfate (CS) mediate the cellular entry of many charged molecules. Fluorescence microscopy and flow cytometry showed that PPCs, but not the neutral cisplatin or oxaliplatin, blocked the cellular entry of TAMRA-R(9) (a nonarginine peptide, R(9)) coupled to the TAMRA fluorescent label 5-(and 6-)carboxytetramethylrhodamine) in Chinese hamster ovary (CHO), human colon carcinoma (HCT116), and osteosarcoma (SAOS-2) cells. Furthermore, detection of platinum accumulation in wt CHO, mutant CHO-pgsD-677 (lacking HS), and CHO-pgsA (lacking HS/CS) cells confirms that HSPG-mediated interactions are an important mechanism for PPC internalization but not so for uncharged cisplatin and oxaliplatin. Endocytosis inhibitor studies show that macropinocytosis, a mechanism of cell entry for heparan sulfate GAGs and arginine-rich peptides, is important in the cellular accumulation of noncovalent TriplatinNC and, to a lesser degree, the covalently binding BBR3464. Clathrin-mediated endocytosis, however, was not involved in either case. Overall, the results suggest a new proteoglycan-mediated mechanism for cellular accumulation of PPCs not shared by cisplatin or oxaliplatin. The results have significant implications for the rational design of platinum antitumor drugs with distinct biological profiles in comparison to those of the clinically used agents as well as expanding the chemotypes for HS proteoglycan-dependent receptors.
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Affiliation(s)
- Heveline Silva
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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45
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Ruhayel RA, Langner JS, Oke MJ, Berners-Price SJ, Zgani I, Farrell NP. Chimeric platinum-polyamines and DNA binding. Kinetics of DNA interstrand cross-link formation by dinuclear platinum complexes with polyamine linkers. J Am Chem Soc 2012; 134:7135-46. [PMID: 22443454 DOI: 10.1021/ja301397h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The first observation of a polyamine-DNA interaction using 2D [(1)H, (15)N] HSQC NMR spectroscopy allows study of the role of the linker in polynuclear platinum-DNA interactions and a novel "anchoring" of the polyamine by Pt-DNA bond formation allows examination of the details of conformational B → Z transitions induced by the polyamine. The kinetics and mechanism of the stepwise formation of 5'-5' 1,4-GG interstrand cross-links (IXLs) by fully (15)N-labeled [{trans-PtCl((15)NH(3))(2)}(2){μ-((15)NH(2)(CH(2))(6)(15)NH(2)(CH(2))(6)(15)NH(2))}](3+) (1,1/t,t-6,6, 1) and [{trans-PtCl((15)NH(3))(2)}(2){μ-((15)NH(2)(CH(2))(6)(15)NH(2)(CH(2))(2)(15)NH(2)(CH(2))(6)(15)NH(2))}](4+) (1,1/t,t-6,2,6, 1') with the self-complementary oligonucleotide 5'-{d(ATATGTACATAT)(2)} (duplex I) are compared to the analogous reaction with 1,0,1/t,t,t (BBR3464) under identical conditions (pH 5.4, 298 K). Initial electrostatic interactions with the DNA are delocalized and followed by aquation to form the monoaqua monochloro species. The rate constant for monofunctional adduct formation, k(MF), for 1 (0.87 M(-1) s(-1)) is 3.5 fold higher than for 1,0,1/t,t,t (0.25 M(-1) s(-1); the value could not be calculated for 1' due to peak overlap). The evidence suggests that several conformers of the bifunctional adduct form, whereas for 1,0,1/t,t,t only two discrete conformers were observed. The combined effect of the conformers observed for 1 and 1' may play a crucial role in the increased potency of these novel complexes compared to 1,0,1/t,t,t. Treated as a single final product, the rate of formation of the 5'-5' 1,4-GG IXL, k(CH), for 1 (k(CH) = 4.37 × 10(-5) s(-1)) is similar to that of 1,0,1/t,t,t, whereas the value for 1' is marginally higher (k(CH) = 5.4 × 10(-5) s(-1)).
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Affiliation(s)
- Rasha A Ruhayel
- School of Biomedical, Biomolecular & Chemical Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009 Australia
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Komeda S. [Drug discovery research in in-vivo antitumor-active azolato-bridged dinuclear Pt(II) complexes]. YAKUGAKU ZASSHI 2012; 132:253-9. [PMID: 22382827 DOI: 10.1248/yakushi.132.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cis-diamminedichloridoplatinum(II) (cisplatin), which was first introduced as a clinical anticancer agent in the 1970s, is still among the most-utilized agents in current cancer chemotherapy. The discovery of cisplatin antitumor activity has catalyzed drug discovery research on antitumor platinum coordination compounds with improved efficacy. Some of new compounds show fewer side effects or expanded clinical applications. Apart from some clinical inconveniences, such as side effects, the high therapeutic efficacy of platinum-based agents implies that further modifications may lead to more effective anticancer platinum drugs which are effective against cancers that are typically resistant to chemotherapy, such as pancreatic cancer, and platinum-refractory cancer. Most of the cisplatin analogs cause cross-resistance to cisplatin, probably because of the similar biological consequences. It is suggested that platinum complexes which interact with DNA; the most probable target molecule, through a mechanism different from that of cisplatin can provide unique anticancer spectra required for next-generation anticancer drugs. Therefore, we synthesized a series of azolato-bridged dinuclear Pt(II) complexes with a general formula, [{cis-Pt(NH(3))(2)}(2)(µ-OH)(µ-azolato)](2+), which can form 1,2-intrastrand crosslinks with a minimal DNA distortion, whereas clinical platinum-based drugs provide 1,2-intrastrand crosslink with severe DNA distortion. Indeed, they exhibit much higher in vitro cytotoxicity than cisplatin, and we have recently found one of the dinuclear Pt(II) complexes exhibits markedly high in vivo antitumor efficacy against pancreatic cancer. Here, I update our drug-discovery research on the series of azolato-bridged dinuclear Pt(II) complexes that may be more effective and safer than current anticancer chemotherapeutic agents.
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Affiliation(s)
- Seiji Komeda
- Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Mie, Japan.
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Abstract
Metal ions play a key role in nucleic acid structure and activity. Elucidation of the rules that govern the binding of metal ions is therefore an essential step for better understanding of the nucleic acid functions. This review is as an update to a preceding one (Metal Ions Biol. Syst., 1996, 32, 91-134), in which we offered a general view of metal ion interactions with mono-, di-, tri-, and oligonucleotides in the solid state, based on their crystal structures reported before 1994. In this chapter, we survey all the crystal structures of metal ion complexes with nucleotides involving oligonucleotides reported after 1994 and we have tried to uncover new characteristic metal bonding patterns for mononucleotides and oligonucleotides with A-RNA and A/B/Z-DNA fragments that form duplexes. We do not cover quadruplexes, duplexes with metal-mediated base-pairs, tRNAs, rRNAs in ribosome, ribozymes, and nucleic acid-drug and -protein complexes. Factors that affect metal binding to mononucleotides and oligonucleotide duplexes are also dealt with.
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48
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Qu Y, Moniodis JJ, Harris AL, Yang X, Hegmans A, Povirk LF, Berners-Price SJ, Farrell NP. Non-Covalent Polynuclear Platinum Compounds as Polyamine Analogs. POLYAMINE DRUG DISCOVERY 2011. [DOI: 10.1039/9781849733090-00191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Polynuclear platinum compounds (PPCs) represent a discrete class of antitumor agents that bear structural resemblance to polyamines. This chapter reviews developments on the chemistry and biology of polynuclear platinum drugs and especially the recognition that “non-covalent” agents based on this motif represent a further challenge to the structure-activity paradigms for platinum antitumor agents. Pt-DNA bond formation is not a strict requirement for DNA affinity leading to manifestation of promising cytotoxicity and antitumor activity. Non-covalent PPCs bind to DNA in a non-covalent manner through a novel binding motif, the phosphate clamp, analogous to the arginine fork. This binding mode is discrete from “classical” intercalation and minor groove binding. In solution, analysis of 1-D and 2-D 1HNMR data places the compounds in the minor groove of the DNA, spanning several base pairs. A melphalan protection assay indicated that the complex was at least as effective in blocking melphalan access to the minor groove as distamycin. Further biological consequences of the structure are remarkably enhanced cellular accumulation, further distinguishing the non-covalent group as a unique class of agents.
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Affiliation(s)
- Yun Qu
- Department of Chemistry Virginia Commonwealth University, Richmond, VA 23284-2006 Australia
| | - Joseph J. Moniodis
- Chemistry M313 School of Biomedical, Biomolecular & Chemical Sciences, University of Western Australia, Crawley, WA 6009 Australia
| | - Amanda L. Harris
- Department of Chemistry Virginia Commonwealth University, Richmond, VA 23284-2006 Australia
| | - Xiaohong Yang
- Department of Chemistry Virginia Commonwealth University, Richmond, VA 23284-2006 Australia
| | - Alex Hegmans
- Department of Chemistry Virginia Commonwealth University, Richmond, VA 23284-2006 Australia
| | - Lawrence F. Povirk
- Department of Pharmacology 380A Goodwin Laboratory, Massey Cancer Center, Virginia Commonwealth University, 401 College St., Richmond, VA 23298-0035 USA
| | - Susan J. Berners-Price
- Chemistry M313 School of Biomedical, Biomolecular & Chemical Sciences, University of Western Australia, Crawley, WA 6009 Australia
- Institute of Glycomics Griffith University, Gold Coast Campus, Qld. 4222 Australia
| | - Nicholas P. Farrell
- Department of Chemistry Virginia Commonwealth University, Richmond, VA 23284-2006 Australia
- Institute of Glycomics Griffith University, Gold Coast Campus, Qld. 4222 Australia
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Malina J, Farrell NP, Brabec V. DNA interstrand cross-links of an antitumor trinuclear platinum(II) complex: thermodynamic analysis and chemical probing. Chem Asian J 2011; 6:1566-74. [PMID: 21557487 DOI: 10.1002/asia.201000935] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Indexed: 11/08/2022]
Abstract
The trinuclear platinum compound [{trans-PtCl(NH(3))(2)}(2)(μ-trans-Pt(NH(3))(2){NH(2)(CH(2))(6)NH(2)}(2))](4+) (BBR3464) belongs to the polynuclear class of platinum-based anticancer agents. These agents form in DNA long-range (Pt,Pt) interstrand cross-links, whose role in the antitumor effects of BBR3464 predominates. Our results show for the first time that the interstrand cross-links formed by BBR3464 between two guanine bases in opposite strands separated by two base pairs (1,4-interstrand cross-links) exist as two distinct conformers, which are not interconvertible, not only if these cross-links are formed in the 5'-5', but also in the less-usual 3'-3' direction. Analysis of the conformers by differential scanning calorimetry, chemical probes of DNA conformation, and minor groove binder Hoechst 33258 demonstrate that each of the four conformers affects DNA in a distinctly different way and adopts a different conformation. The results also support the thesis that the molecule of antitumor BBR3464 when forming DNA interstrand cross-links may adopt different global structures, including different configurations of the linker chain of BBR3464 in the minor groove of DNA. Our findings suggest that the multiple DNA interstrand cross-links available to BBR3464 may all contribute substantially to its cytotoxicity.
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Affiliation(s)
- Jaroslav Malina
- Institute of Biophysics, Academy of Sciences of the Czech Republic v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
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50
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Komeda S. Unique platinum–DNA interactions may lead to more effective platinum-based antitumor drugs. Metallomics 2011; 3:650-5. [DOI: 10.1039/c1mt00012h] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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