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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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Woods JJ, Spivey JA, Wilson JJ. A [1H,15N] Heteronuclear Single Quantum Coherence NMR Study of the Solution Reactivity of the Ruthenium‐Based Mitochondrial Calcium Uniporter Inhibitor Ru265. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Joshua J. Woods
- Cornell University Department of Chemistry and Chemical Biology 14853 Ithaca UNITED STATES
| | - Jesse A. Spivey
- Cornell University Department of Chemistry and Chemical Biology 14853 Ithaca UNITED STATES
| | - Justin J. Wilson
- Cornell University Department of Chemistry and Chemical Biology G50A Baker Laboratory 14853 Ithaca UNITED STATES
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3
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Zhu X, Li Z, Ji X, Chen Q, Wu S, Gao E, Zhu M. Two new lanthanide complexes with 5-(Pyrazol-1-yl)nicotinic acid: Structures and their anti-cancer properties. J Inorg Biochem 2021; 222:111505. [PMID: 34144467 DOI: 10.1016/j.jinorgbio.2021.111505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 05/29/2021] [Accepted: 05/30/2021] [Indexed: 02/08/2023]
Abstract
Two new lanthanide complexes [PrL2(EA)2]NO3 (complex 1) and [SmL2(EA)2]NO3 (complex 2) (H2L = 5-(Pyrazol-1-yl)nicotinic acid, EA = CH3CH2OH) were synthesized. The structures were characterized by single crystal X-ray and elemental analysis. The interaction between the complex and fish sperm DNA(FS-DNA) was monitored using ultraviolet and fluorescence spectroscopy, and the binding constants were determined. Both complexes showed the ability to effectively bind DNA, and the molecular docking technology was used to simulate the binding of the complex and DNA. In addition, through the annexin V-Fluorescein Isothiocyanate(FITC)/ Propidium Iodide (PI) test experiment, tetrazollium [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) in vitro test, and cell morphology apoptosis studies, it was shown that the complex can effectively induce HeLa tumor cell apoptosis. Compared with cisplatin and complex, complex 1 shows significant cancer cell inhibition, and we hope that this new type of complex will open up new ways for the next generation of drugs in biomedical applications.
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Affiliation(s)
- Xiaopeng Zhu
- International Key Laboratory of Liaoning Inorganic Molecule-Based Chemical and Department of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, PR China
| | - Zhipeng Li
- International Key Laboratory of Liaoning Inorganic Molecule-Based Chemical and Department of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, PR China
| | - Xiaoxi Ji
- International Key Laboratory of Liaoning Inorganic Molecule-Based Chemical and Department of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, PR China
| | - Qing Chen
- International Key Laboratory of Liaoning Inorganic Molecule-Based Chemical and Department of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, PR China
| | - Shuangyan Wu
- International Key Laboratory of Liaoning Inorganic Molecule-Based Chemical and Department of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, PR China
| | - Enjun Gao
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, PR China
| | - Mingchang Zhu
- International Key Laboratory of Liaoning Inorganic Molecule-Based Chemical and Department of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, PR China; Key Laboratory of Resource Chemical Technology and Materials, (Ministry of Education), Shenyang University Chemical Technology, Shenyang 110142, PR China.
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4
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Gorle AK, Berners-Price SJ, Farrell NP. Biological relevance of interaction of platinum drugs with O-donor ligands. Inorganica Chim Acta 2019; 495. [PMID: 31354168 DOI: 10.1016/j.ica.2019.118974] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Platinum complexes with S and N-donor small molecule ligands have received much attention with respect to understanding of Pt-protein and Pt-DNA(RNA) interactions in biology. Oxygen-donor ligands have received less attention, partly due to the fact that as a hard Lewis base, oxygen-donor interactions are expected to be less favourable for the soft Lewis acid properties of Pt(II), especially. Yet, it is now clear that for a full understanding of the cellular fate of platinum complexes, a plethora of oxygen-donor interactions are possible, considering extracellular and intracellular concentrations of simple anions in buffer. Further, the importance of the general class of glycans, the third major class of biomolecules after proteins and nucleic acids, contain many specific examples of important biomolecules such as sialic acids and sulphated glycosaminoglycans capable of metal complex interactions. In this contribution we summarise some important kinetic and thermodynamic aspects of platinum-oxygen-donor ligand interactions and their relevance to examples of biomolecular interactions contributing to the overall profile of platinum (and metal complexes in general) biology.
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Affiliation(s)
- Anil K Gorle
- 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, 23284, Virginia, USA.,Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland, 4222, Australia
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5
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Gorle AK, Zhang J, Berners-Price SJ, Farrell NP. Influence of geometric isomerism on the binding of platinum anticancer agents with phospholipids. Dalton Trans 2019; 48:9791-9800. [PMID: 31070627 PMCID: PMC6699998 DOI: 10.1039/c9dt00753a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reported herein is a detailed NMR and DFT study of the interaction of the 15N-labelled dinuclear platinum anticancer compound [{cis-PtCl(NH3)2}2{μ-H2N(CH2)6NH2}]2+ (15N-1, 1,1/c,c) with 1,2-dihexanoyl-sn-glycero-3-phosphate (DHPA), as a comparison with an earlier study of the interaction of the same water-soluble phospholipid fragment with the geometric trans isomer (1,1/t,t). The reaction of 15N-1 with the sodium salt of DHPA was studied at 298 K, pH ∼ 5.6, by [1H,15N] HSQC 2D NMR spectroscopy. The NMR data, supported by DFT models, provide evidence that the monofunctional DHPA adduct of 15N-1 exists in two conformational forms, with different orientation of the (CH2)6 linker; one has an interaction between the unbound {PtN3Cl} moiety and the coordinated DHPA molecule. Similarly, two bifunctional adduct conformers are identified, in which one has an interaction between the phosphate groups of the two bound DHPA molecules. When compared to the previously reported reactions of 1,1/t,t with DHPA, equilibrium conditions of the 1,1/c,c reaction are reached more slowly (120 h), similar to the reaction with phosphate. The rate constant for the first step of DHPA binding (kL) is slightly lower (1.6 fold) for the cis-compared to the trans-isomer, whereas the rate constant for the reverse reaction is 4-fold lower, resulting in a much greater proportion of DHPA bound species at equilibrium.
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Affiliation(s)
- Anil K Gorle
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, Queensland 4222, Australia.
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6
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Gorle AK, Rajaratnam P, Chang CW, von Itzstein M, Berners-Price SJ, Farrell NP. Glycans as Ligands in Bioinorganic Chemistry. Probing the Interaction of a Trinuclear Platinum Anticancer Complex with Defined Monosaccharide Fragments of Heparan Sulfate. Inorg Chem 2019; 58:7146-7155. [PMID: 30632736 DOI: 10.1021/acs.inorgchem.8b03035] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We report herein a detailed NMR study of the aquation and subsequent covalent binding of the trinuclear clinical agent [{ trans-PtCl(15NH3)2}2{μ- trans-Pt(15NH3)2(15NH2(CH2)615NH2)2}]4+ (1, 1,0,1/ t, t, t or Triplatin) with three d-glucosamine residues containing varied O-sulfate and N-sulfate or N-acetyl substitutions, which represent monosaccharide fragments present within the repeating disaccharide sequences of cell surface heparan sulfate (HS). The monosaccharides GlcNS(6S), GlcNS, and GlcNAc(6S) were synthesized in good yield from a common 4,6-diol α-methyl glucopyranoside intermediate. The reactions of 15N-1 with sodium sulfate, GlcNS(6S), GlcNS, and GlcNAc(6S) were followed by 2D [1H,15N] heteronuclear single quantum coherence (HSQC) NMR spectroscopy using conditions (298 K, pH ≈5.4) similar to those previously used for other anionic systems, allowing for a direct comparison. The equilibrium constants (p K1) for the aquation of 1 in the presence of GlcNS(6S) and GlcNS were slightly higher compared to that of the aquation in a sulfate solution, while a comparable p K1 value was observed in the presence of GlcNAc(6S). A comparison of the rate constants for sulfate displacement of the aqua ligand showed preferential binding to 2- N-sulfate compared to 6- O-sulfate but a more rapid liberation. For disulfated GlcNS(6S), equilibrium conditions were achieved rapidly (9 h) and strongly favored the dichloro form, with <2% sulfato species observed. The value of kL1 was up to 15-fold lower than that for binding to sulfate, whereas the rate constant for the reverse ligation ( k-L1) was comparable. Equilibrium conditions were achieved much more slowly (∼ 100 h) for the reactions of 1 with GlcNS and GlcNAc(6S), attributed to covalent binding also to the N-donor of the sulfamate (GlcNS) group and the O-donor of the N-acetyl [GlcNAc(6S)] group. The rate constants ( kL2) were 20-40-fold lower than that for binding to the 2- N- or 6- O-sulfate, but the binding was less reversible, so that their equilibrium concentrations (5-8%) were comparable to the 2- N- or 6- O-sulfate-bound species. The results emphasize the relevance of glycans in bioinorganic chemistry and underpin a fundamental molecular description of the HS-Pt interactions that alter the profile of platinum agents from cytotoxic to metastatic in a systematic manner.
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Affiliation(s)
- Anil Kumar Gorle
- 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
| | - Chih-Wei Chang
- 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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7
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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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8
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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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9
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Gao C, Fei F, Wang T, Yang B, Gou S, Yang J, Liao L. Synthesis and in vitro cytotoxicity of platinum(II) complexes with chiral N-monosubstituted 1,2-cyclohexyldiamine derivatives as the carrier groups. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.775430] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Chuanzhu Gao
- a Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming , China
| | - Fan Fei
- a Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming , China
| | - Tianshuai Wang
- a Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming , China
| | - Bo Yang
- a Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming , China
| | - Shaohua Gou
- b Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research , Southeast University , Nanjing , China
| | - Jian Yang
- a Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming , China
| | - Liali Liao
- a Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming , China
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10
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Ruhayel RA, Berners-Price SJ, Farrell NP. Competitive formation of both long-range 5'-5' and short-range antiparallel 3'-3' DNA interstrand cross-links by a trinuclear platinum complex on binding to a 10-mer duplex. Dalton Trans 2013; 42:3181-7. [PMID: 23165925 PMCID: PMC4004642 DOI: 10.1039/c2dt32079g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
2D [(1)H, (15)N] HSQC NMR spectroscopy has been used to monitor the reaction of fully (15)N-labelled [{trans-PtCl(NH(3))(2)}(2)(μ-trans-Pt(NH(3))(2){NH(2)(CH(2))(6)NH(2)}(2))](4+) (Triplatin, BBR3464 or 1,0,1/t,t,t ((15)N-1)) with the self-complementary 10-mer DNA duplex 5'-{d(ACGTATACGT)(2)} (duplex I) at pH 5.4 and 298 K. Initial electrostatic interactions were observed in the minor groove of the duplex, followed directly by aquation to form the monoaqua monochloro species. There was evidence for two discrete monofunctional adducts, through covalent binding at the guanine N7 sites, and one had distinctly different (1)H/(15)N chemical shifts to those observed previously in analogous reactions. Bifunctional adduct formation followed by binding at a second guanine N7 site with evidence for both the 3'-3' 1,2-GG and 5'-5' 1,6-GG interstrand cross-links in a ratio of 2 : 1. The results show that cross-link preference is kinetically controlled and will depend critically on the reaction conditions, explaining why in a previous reaction of 1 with duplex I the major adduct isolated by HPLC had two simultaneous 3'-3' 1,2-interstrand cross-links.
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Affiliation(s)
- Rasha A. Ruhayel
- Institute for Glycomics, Griffith University, Gold Coast Campus, QLD 4222, Australia
- School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Susan J. Berners-Price
- Institute for Glycomics, Griffith University, Gold Coast Campus, QLD 4222, Australia
- School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Nicholas P. Farrell
- Institute for Glycomics, Griffith University, Gold Coast Campus, QLD 4222, Australia
- Department of Chemistry, Virginia Commonwealth University Richmond, Virginia, 23284-2006 USA
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Liu W, Gust R. Metal N-heterocyclic carbene complexes as potential antitumor metallodrugs. Chem Soc Rev 2013; 42:755-73. [PMID: 23147001 DOI: 10.1039/c2cs35314h] [Citation(s) in RCA: 586] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wukun Liu
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str 2+4, 14195 Berlin, Germany
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12
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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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13
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Benedetti BT, Peterson EJ, Kabolizadeh P, Martínez A, Kipping R, Farrell NP. Effects of noncovalent platinum drug-protein interactions on drug efficacy: use of fluorescent conjugates as probes for drug metabolism. Mol Pharm 2011; 8:940-8. [PMID: 21548575 DOI: 10.1021/mp2000583] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The overall efficacy of platinum based drugs is limited by metabolic deactivation through covalent drug-protein binding. In this study the factors affecting cytotoxicity in the presence of glutathione, human serum albumin (HSA) and whole serum binding with cisplatin, BBR3464, and TriplatinNC, a "noncovalent" derivative of BBR3464, were investigated. Upon treatment with buthionine sulfoximine (BSO), to reduce cellular glutathione levels, cisplatin and BBR3464-induced apoptosis was augmented whereas TriplatinNC-induced cytotoxicity was unaltered. Treatment of A2780 ovarian carcinoma cells with HSA-bound cisplatin (cisplatin/HSA) and cisplatin preincubated with whole serum showed dramatic decreases in cytotoxicity, cellular accumulation, and DNA adduct formation compared to treatment with cisplatin alone. Similar effects are seen with BBR3464. In contrast, TriplatinNC, the HSA-bound derivative (TriplatinNC/HSA), and TriplatinNC pretreated with whole serum retained identical cytotoxic profiles and equal levels of cellular accumulation at all time points. Confocal microscopy of both TriplatinNC-NBD, a fluorescent derivative of TriplatinNC, and TriplatinNC-NBD/HSA showed nuclear/nucleolar localization patterns, distinctly different from the lysosomal localization pattern seen with HSA. Cisplatin-NBD, a fluorescent derivative of cisplatin, was shown to accumulate in the nucleus and throughout the cytoplasm while the localization of cisplatin-NBD/HSA was limited to lysosomal regions of the cytoplasm. The results suggest that TriplatinNC can avoid high levels of metabolic deactivation currently seen with clinical platinum chemotherapeutics, and therefore retain a unique cytotoxic profile after cellular administration.
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Affiliation(s)
- Brad T Benedetti
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia, USA
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Ruhayel RA, Zgani I, Berners-Price SJ, Farrell NP. Solution studies of dinuclear polyamine-linked platinum-based antitumour complexes. Dalton Trans 2011; 40:4147-54. [PMID: 21384050 DOI: 10.1039/c1dt00001b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aquation profiles of two novel dinuclear polyamine-linked, platinum-based antitumour complexes [{trans-PtCl((15)NH(3))(2)}(2){μ-((15)NH(2)(CH(2))(6)(15)NH(2)(CH(2))(6)(15)NH(2))}](3+) (BBR3007, 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+) (BBR3610, 1,1/t,t-6,2,6, 1') have been probed using 2D [(1)H, (15)N] HSQC NMR spectroscopy. Reported herein are the rate constants for the hydrolysis of 1 and 1', as well as the acid dissociation constants of the coordinated aqua ligands in their aquated derivatives. The aquation and anation rate constants for the single step aquation model in 15 mM NaClO(4) (pH 5.4) at 298 K are, for 1, k(1) = 7.2 ± 0.1 ×10(-5) s(-1), k(-1) = 0.096 ± 0.002 M(-1) s(-1) and, for 1', k(1) = 4.0 ± 0.2 × 10(-5) s(-1), k(-1) = 1.4 ± 0.1 M(-1) s(-1). The effect of the linker backbone (Pt(tetra(m)mine vs. polyamine) was evaluated by comparison with previous data for the trinuclear complex [{trans-PtCl(NH(3))(2)}(2)(μ-trans-Pt(NH(3))(2){NH(2)(CH(2))(6)NH(2)}(2))](4+) (1,0,1/t,t,t or BBR3464). The pK(1) for 1,0,1/t,t,t (3.44) is closest to that of 1 (3.12), while the pronounced difference for 1' (4.54), means that 1' is the least aquated of the three complexes at equilibrium. pK(a) values of 5.92 were calculated for the aquated forms of both 1 and 1', which are 0.3 pK units higher than for either 1,0,1/t,t,t, or the dinuclear 1,1/t,t. The higher pK(a) values for both polyamine-linked compounds may be attributed to the formation of macrochelates between the central NH(2) groups and the {PtN(3)O} coordination sphere of the aquated species.
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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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