1
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Navas F, Chocarro-Calvo A, Iglesias-Hernández P, Fernández-García P, Morales V, García-Martínez JM, Sanz R, De la Vieja A, García-Jiménez C, García-Muñoz RA. Promising Anticancer Prodrugs Based on Pt(IV) Complexes with Bis-organosilane Ligands in Axial Positions. J Med Chem 2024; 67:6410-6424. [PMID: 38592014 PMCID: PMC11056991 DOI: 10.1021/acs.jmedchem.3c02393] [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: 12/20/2023] [Revised: 03/15/2024] [Accepted: 03/27/2024] [Indexed: 04/10/2024]
Abstract
We report two novel prodrug Pt(IV) complexes with bis-organosilane ligands in axial positions: cis-dichloro(diamine)-trans-[3-(triethoxysilyl)propylcarbamate]platinum(IV) (Pt(IV)-biSi-1) and cis-dichloro(diisopropylamine)-trans-[3-(triethoxysilyl) propyl carbamate]platinum(IV) (Pt(IV)-biSi-2). Pt(IV)-biSi-2 demonstrated enhanced in vitro cytotoxicity against colon cancer cells (HCT 116 and HT-29) compared with cisplatin and Pt(IV)-biSi-1. Notably, Pt(IV)-biSi-2 exhibited higher cytotoxicity toward cancer cells and lower toxicity on nontumorigenic intestinal cells (HIEC6). In preclinical mouse models of colorectal cancer, Pt(IV)-biSi-2 outperformed cisplatin in reducing tumor growth at lower concentrations, with reduced side effects. Mechanistically, Pt(IV)-biSi-2 induced permanent DNA damage independent of p53 levels. DNA damage such as double-strand breaks marked by histone gH2Ax was permanent after treatment with Pt(IV)-biSi-2, in contrast to cisplatin's transient effects. Pt(IV)-biSi-2's faster reduction to Pt(II) species upon exposure to biological reductants supports its superior biological response. These findings unveil a novel strategy for designing Pt(IV) anticancer prodrugs with enhanced activity and specificity, offering therapeutic opportunities beyond conventional Pt drugs.
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Affiliation(s)
- Francisco Navas
- Group
of Chemical and Environmental Engineering, Rey Juan Carlos University. C/Tulipán s/n, Móstoles, Madrid28933, Spain
| | - Ana Chocarro-Calvo
- Department
of Basic Health Sciences. Rey Juan Carlos
University. Avda. Atenas
s/n, Alcorcón, Madrid 28922, Spain
| | - Patricia Iglesias-Hernández
- Endocrine
Tumor Unit Chronic Disease Program (UFIEC). Carlos III Health Institute. Ctra. Majadahonda a Pozuelo km 2,2. Majadahonda, Madrid 28220, Spain
| | - Paloma Fernández-García
- Group
of Chemical and Environmental Engineering, Rey Juan Carlos University. C/Tulipán s/n, Móstoles, Madrid28933, Spain
| | - Victoria Morales
- Group
of Chemical and Environmental Engineering, Rey Juan Carlos University. C/Tulipán s/n, Móstoles, Madrid28933, Spain
| | - José Manuel García-Martínez
- Department
of Basic Health Sciences. Rey Juan Carlos
University. Avda. Atenas
s/n, Alcorcón, Madrid 28922, Spain
| | - Raúl Sanz
- Group
of Chemical and Environmental Engineering, Rey Juan Carlos University. C/Tulipán s/n, Móstoles, Madrid28933, Spain
| | - Antonio De la Vieja
- Endocrine
Tumor Unit Chronic Disease Program (UFIEC). Carlos III Health Institute. Ctra. Majadahonda a Pozuelo km 2,2. Majadahonda, Madrid 28220, Spain
| | - Custodia García-Jiménez
- Department
of Basic Health Sciences. Rey Juan Carlos
University. Avda. Atenas
s/n, Alcorcón, Madrid 28922, Spain
| | - Rafael A. García-Muñoz
- Group
of Chemical and Environmental Engineering, Rey Juan Carlos University. C/Tulipán s/n, Móstoles, Madrid28933, Spain
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2
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Gabano E, Gariboldi MB, Marras E, Barbato F, Ravera M. Platinum(IV) combo prodrugs containing cyclohexane-1 R,2 R-diamine, valproic acid, and perillic acid as a multiaction chemotherapeutic platform for colon cancer. Dalton Trans 2023; 52:11349-11360. [PMID: 37530512 DOI: 10.1039/d3dt01876h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
The complex [PtCl2(cyclohexane-1R,2R-diamine)] has been combined in a Pt(IV) molecule with two different bioactive molecules (i.e., the histone deacetylase inhibitor 2-propylpentanoic acid or valproic acid, VPA, and the potential antimetastatic molecule 4-isopropenylcyclohexene-1-carboxylic acid or perillic acid, PA) in order to obtain a set of multiaction or multitarget antiproliferative agents. In addition to traditional thermal synthetic procedures, microwave-assisted heating was used to speed up their preparation. All Pt(IV) complexes showed antiproliferative activity on four human colon cancer cell lines (namely HCT116, HCT8, RKO and HT29) in the nanomolar range, considerably better than those of [PtCl2(cyclohexane-1R,2R-diamine)], VPA, PA, and the reference drug oxaliplatin. The synthesized complexes showed pro-apoptotic and pro-necrotic effects and the ability to induce cell cycle alterations. Moreover, the downregulation of histone deacetylase activity, leading to an increase in histone H3 and H4 levels, and the antimigratory activity, indicated by the reduction of the levels of matrix metalloproteinases MMP2 and MMP9, demonstrated the multiaction nature of the complexes, which showed biological properties similar to or better than those of VPA and PA, but at lower concentrations, probably due to the lipophilicity of the combo molecule that increases the intracellular concentration of the single components (i.e., [PtCl2(cyclohexane-1R,2R-diamine)], VPA and PA).
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Affiliation(s)
- Elisabetta Gabano
- Dipartimento per lo Sviluppo Sostenibile e la Transizione Ecologica, Università del Piemonte Orientale, Piazza Sant'Eusebio 5, 13100 Vercelli, Italy
| | - Marzia Bruna Gariboldi
- Dipartimento di Biotecnologie e Scienze della Vita (DBSV), Università dell'Insubria, via Dunant 3, Varese, Italy
| | - Emanuela Marras
- Dipartimento di Biotecnologie e Scienze della Vita (DBSV), Università dell'Insubria, via Dunant 3, Varese, Italy
| | - Francesca Barbato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
| | - Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
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3
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McLoughlin CP, Kaseman DC, Fettinger JC, Power PP. Rearrangement of a Ge(II) aryloxide to yield a new Ge(II) oxo-cluster [Ge 6(μ 3-O) 4(μ 2-OC 6H 2-2,4,6-Cy 3) 4](NH 3) 0.5: main group aryloxides of Ge(II), Sn(II), and Pb(II) [M(OC 6H 2-2,4,6-Cy 3) 2] 2 (Cy = cyclohexyl). Dalton Trans 2023. [PMID: 37377059 DOI: 10.1039/d3dt00906h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
The new Ge(II) cluster [Ge6(μ3-O)4(μ2-OC6H2-2,4,6-Cy3)4](NH3)0.5 (1) and three divalent Group 14 aryloxide derivatives [Ge(OC6H2-2,4,6-Cy3)2]2 (2), [Sn(OC6H2-2,4,6-Cy3)2]2 (3), and [Pb(OC6H2-2,4,6-Cy3)2]2 (4) of the new tricyclohexylphenyloxo ligand, [(-OC6H2-2,4,6-Cy3)2]2 (Cy = cyclohexyl), were synthesized and characterized. Complexes 1-4 were obtained by reaction of the metal bissilylamides M(N(SiMe3)2)2 (M = Ge, Sn, Pb) with 2,4,6-tricyclohexylphenol in hexane at room temperature. If the freshly generated reaction mixture for the synthesis of 2 is stirred in solution for 12 h at room temperature, the cluster [Ge6(μ3-O)4(μ2-OC6H2-2,4,6-Cy3)4](NH3)0.5 (1), which features a rare Ge6O8 core that includes ammonia molecules in non-coordinating positions, is formed. Complexes 3 and 4 were also characterized via119Sn{1H} NMR and 207Pb NMR spectroscopy and feature signals at -280.3 ppm (119Sn{1H}, 25 °C) and 1541.0 ppm (207Pb, 37 °C), respectively. The spectroscopic characterization of 3 and 4 extends known 119Sn parameters for dimeric Sn(II) aryloxides, but data for 207Pb NMR spectra for Pb(II) aryloxides are rare. We present also a rare VT-NMR study of a homoleptic 3-coordinate Pb(II) aryloxide. The crystal structures of 2, 3, and 4 feature interligand H⋯H contacts that are similar in number to those of related transition metal derivatives despite the larger size of the group 14 elements.
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Affiliation(s)
- Connor P McLoughlin
- Department of Chemistry, University of California, Davis, California 95616, USA.
| | - Derrick C Kaseman
- Nuclear Magnetic Resonance Facility, University of California, One Shields Avenue, Davis, California 95616, USA
- Biochemistry and Biotechnology Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - James C Fettinger
- Department of Chemistry, University of California, Davis, California 95616, USA.
| | - Philip P Power
- Department of Chemistry, University of California, Davis, California 95616, USA.
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4
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The Strange Case: The Unsymmetric Cisplatin-Based Pt(IV) Prodrug [Pt(CH 3COO)Cl 2(NH 3) 2(OH)] Exhibits Higher Cytotoxic Activity with respect to Its Symmetric Congeners due to Carrier-Mediated Cellular Uptake. Bioinorg Chem Appl 2022; 2022:3698391. [PMID: 36620349 PMCID: PMC9822769 DOI: 10.1155/2022/3698391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/24/2022] [Accepted: 12/01/2022] [Indexed: 01/01/2023] Open
Abstract
The biological behavior of the axially unsymmetric antitumor prodrug (OC-6-44)-acetatodiamminedichloridohydroxidoplatinum(IV), 2, was deeply investigated and compared with that of analogous symmetric Pt(IV) complexes, namely, dihydroxido 1 and diacetato 3, which have a similar structure. The complexes were tested on a panel of human tumor cell lines. Complex 2 showed an anomalous higher cytotoxicity (similar to that of cisplatin) with respect to their analogues 1 and 3. Their reduction potentials, reduction kinetics, lipophilicity, and membrane affinity are compared. Cellular uptake and DNA platination of Pt(IV) complexes were deeply investigated in the sensitive A2780 human ovarian cancer cell line and in the corresponding resistant A2780cisR subline. The unexpected activity of 2 appears to be related to its peculiar cellular accumulation and not to a different rate of reduction or a different efficacy in DNA platination and/or efficiency in apoptosis induction. Although the exact mechanism of cell uptake is not fully deciphered, a series of naïve experiments indicates an energy-dependent, carrier-mediated transport: the organic cation transporters (OCTs) are the likely proteins involved.
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5
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Theillet FX, Luchinat E. In-cell NMR: Why and how? PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2022; 132-133:1-112. [PMID: 36496255 DOI: 10.1016/j.pnmrs.2022.04.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 04/19/2022] [Accepted: 04/27/2022] [Indexed: 06/17/2023]
Abstract
NMR spectroscopy has been applied to cells and tissues analysis since its beginnings, as early as 1950. We have attempted to gather here in a didactic fashion the broad diversity of data and ideas that emerged from NMR investigations on living cells. Covering a large proportion of the periodic table, NMR spectroscopy permits scrutiny of a great variety of atomic nuclei in all living organisms non-invasively. It has thus provided quantitative information on cellular atoms and their chemical environment, dynamics, or interactions. We will show that NMR studies have generated valuable knowledge on a vast array of cellular molecules and events, from water, salts, metabolites, cell walls, proteins, nucleic acids, drugs and drug targets, to pH, redox equilibria and chemical reactions. The characterization of such a multitude of objects at the atomic scale has thus shaped our mental representation of cellular life at multiple levels, together with major techniques like mass-spectrometry or microscopies. NMR studies on cells has accompanied the developments of MRI and metabolomics, and various subfields have flourished, coined with appealing names: fluxomics, foodomics, MRI and MRS (i.e. imaging and localized spectroscopy of living tissues, respectively), whole-cell NMR, on-cell ligand-based NMR, systems NMR, cellular structural biology, in-cell NMR… All these have not grown separately, but rather by reinforcing each other like a braided trunk. Hence, we try here to provide an analytical account of a large ensemble of intricately linked approaches, whose integration has been and will be key to their success. We present extensive overviews, firstly on the various types of information provided by NMR in a cellular environment (the "why", oriented towards a broad readership), and secondly on the employed NMR techniques and setups (the "how", where we discuss the past, current and future methods). Each subsection is constructed as a historical anthology, showing how the intrinsic properties of NMR spectroscopy and its developments structured the accessible knowledge on cellular phenomena. Using this systematic approach, we sought i) to make this review accessible to the broadest audience and ii) to highlight some early techniques that may find renewed interest. Finally, we present a brief discussion on what may be potential and desirable developments in the context of integrative studies in biology.
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Affiliation(s)
- Francois-Xavier Theillet
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France.
| | - Enrico Luchinat
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum - Università di Bologna, Piazza Goidanich 60, 47521 Cesena, Italy; CERM - Magnetic Resonance Center, and Neurofarba Department, Università degli Studi di Firenze, 50019 Sesto Fiorentino, Italy
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6
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Pascoite Minerals and Potential Application of NMR Spectroscopy. MINERALS 2022. [DOI: 10.3390/min12080980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
The 20 minerals encompassing the pascoite family of decavanadate isopolyanion-containing [V10O28]6− minerals include a few minerals, such as rakovanite, that have been described as containing a protonated decavanadate anion. Rakovanite was originally assigned the formula Na3[H3V10O28]•15H2O and now is redefined with an ideal formula (NH4)3Na3[V10O28]•12H2O. Nuclear magnetic resonance (NMR) and particularly 51V NMR spectroscopy is an informative method used to describe the protonation state and speciation in both solid and solution states of materials in the chemical and life sciences. However, 51V NMR spectroscopy has not yet been used experimentally to distinguish the protonation state of the decavanadate ion of leaching solutions and thus contributing to the discussion regarding the controversial protonation states of decavanadate ions in gunterite, rakovanite, and nashite. In contrast, the morphology and crystal structure for apatites, vanadinite, pyromorphite, and mimetite was related to 207Pb NMR chemical shifts, assisting in describing the local environments of these minerals. NMR spectroscopy could be a useful method if used in the future for decavanadate-containing minerals. Currently, partial reduction of two Pascoite minerals (caseyite and nashite) is proposed and accordingly could now effectively be investigated using a different magnetic resonance technique, EPR spectroscopy.
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7
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Ghosh Biswas R, Croxall MP, Lawrence RT, Soong R, Goh MC, Simpson AJ. A new perspective on the photocatalytic action of titanium dioxide on phenol elucidated using comprehensive multiphase NMR. NANOSCALE 2022; 14:9869-9876. [PMID: 35775921 DOI: 10.1039/d2nr01911f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Comprehensive Multiphase NMR (CMP-NMR) is a recently developed technique capable of simultaneously observing different phases - solutions, gels, and solids - while providing the chemical specificity of traditional NMR. With this new tool, the heterogeneous photocatalysis of phenol by titanium dioxide (P25 TiO2) is re-examined to gain information about the occurrence of reaction at different regions between the catalyst and the solution. It was found that the proportion of phenol in different phases changes over the course of the photodegradation period. The photocatalyst appears to preferentially degrade phenol molecules that are weakly associated with the surface, such that they have restricted mobility in a 'gel-like' state. Diffusion Ordered Spectroscopy (DOSY) corroborates the relative change in phenol signals between freely diffusing solution and diffusion restricted gels as measured using CMP-NMR. The surface of P25 TiO2 was found to foul over the course of the 200-hour photodegradation period that was monitored using the solid-state capabilities of the CMP-NMR. Finally, CMP-NMR showed differences in the photodegradation of phenol by P25 TiO2 to that of a TiO2-nitrogen doped graphene quantum dot (NGQD) composite. With the latter composite, no fouling of the surface was seen over time. This application of CMP-NMR to the field of catalysis demonstrates its potential to better understand and study photocatalytic systems in general.
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Affiliation(s)
- Rajshree Ghosh Biswas
- Department of Chemistry, University of Toronto, 80 St. George St, Toronto, Ontario, M5S 3H6, Canada.
| | - Mark P Croxall
- Department of Chemistry, University of Toronto, 80 St. George St, Toronto, Ontario, M5S 3H6, Canada.
| | - Reece T Lawrence
- Department of Materials Science and Engineering, University of Toronto, 184 College St, Toronto, Ontario, M5S 3E4, Canada
| | - Ronald Soong
- Department of Physical and Environmental Science, University of Toronto, Scarborough Campus, 1265 Military Trail, Toronto, Ontario, M1C 1A4, Canada
| | - M Cynthia Goh
- Department of Chemistry, University of Toronto, 80 St. George St, Toronto, Ontario, M5S 3H6, Canada.
- Department of Materials Science and Engineering, University of Toronto, 184 College St, Toronto, Ontario, M5S 3E4, Canada
| | - Andre J Simpson
- Department of Chemistry, University of Toronto, 80 St. George St, Toronto, Ontario, M5S 3H6, Canada.
- Department of Physical and Environmental Science, University of Toronto, Scarborough Campus, 1265 Military Trail, Toronto, Ontario, M1C 1A4, Canada
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8
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Stückrath JB, Gasevic T, Bursch M, Grimme S. Benchmark Study on the Calculation of 119Sn NMR Chemical Shifts. Inorg Chem 2022; 61:3903-3917. [PMID: 35180346 DOI: 10.1021/acs.inorgchem.1c03453] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A new benchmark set termed SnS51 for assessing quantum chemical methods for the computation of 119Sn NMR chemical shifts is presented. It covers 51 unique 119Sn NMR chemical shifts for a selection of 50 tin compounds with diverse bonding motifs and ligands. The experimental reference data are in the spectral range of ±2500 ppm measured in seven different solvents. Fifteen common density functional approximations, two scalar- and one spin-orbit relativistic approach are assessed based on conformer ensembles generated using the CREST/CENSO scheme and state-of-the-art semiempirical (GFN2-xTB), force field (GFN-FF), and composite DFT methods (r2SCAN-3c). Based on the results of this study, the spin-orbit relativistic method combinations of SO-ZORA with PBE0 or revPBE functionals are generally recommended. Both yield mean absolute deviations from experimental data below 100 ppm and excellent linear regression determination coefficients of ≤0.99. If spin-orbit calculations are not affordable, the use of SR-ZORA with B3LYP or X2C with ωB97X or M06 may be considered to obtain qualitative predictions if no severe spin-orbit effects, for example, due to heavy nuclei containing ligands, are expected. An empirical linear scaling correction is demonstrated to be applicable for further improvement, and respective empirical parameters are given. Conformational effects on chemical shifts are studied in detail but are mostly found to be small. However, in specific cases when the ligand sphere differs substantially between conformers, chemical shifts can change by up to several hundred ppm.
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Affiliation(s)
- Julius B Stückrath
- Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, University of Bonn, Beringstr. 4, 53115 Bonn, Germany
| | - Thomas Gasevic
- Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, University of Bonn, Beringstr. 4, 53115 Bonn, Germany
| | - Markus Bursch
- Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, University of Bonn, Beringstr. 4, 53115 Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, University of Bonn, Beringstr. 4, 53115 Bonn, Germany
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9
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Hajihosseinloo A, Salahinejad M, Rofouei MK, Ghasemi JB. Exploratory and machine learning analysis of the stability constants of HgII- triazene ligands complexes. MAIN GROUP CHEMISTRY 2021. [DOI: 10.3233/mgc-210130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Knowing stability constants for the complexes HgII with extracting ligands is very important from environmental and therapeutic standpoints. Since the selectivity of ligands can be stated by the stability constants of cation–ligand complexes, quantitative structure–property relationship (QSPR) investigations on binding constant of HgII complexes were done. Experimental data of the stability constants in ML2 complexation of HgII and synthesized triazene ligands were used to construct and develop QSPR models. Support vector machine (SVM) and multiple linear regression (MLR) have been employed to create the QSPR models. The final model showed squared correlation coefficient of 0.917 and the standard error of calibration (SEC) value of 0.141 log K units. The proposed model presented accurate prediction with the Leave-One-Out cross validation ( Q LOO 2 = 0.756) and validated using Y-randomization and external test set. Statistical results demonstrated that the proposed models had suitable goodness of fit, predictive ability, and robustness. The results revealed the importance of charge effects and topological properties of ligand in HgII - triazene complexation.
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Affiliation(s)
| | - Maryam Salahinejad
- Maryam Salahinejad, Nuclear Science and Technology Research Institute, Tehran, Iran
| | | | - Jahan B. Ghasemi
- Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran
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10
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Anaraki MT, Lysak DH, Downey K, Kock FVC, You X, Majumdar RD, Barison A, Lião LM, Ferreira AG, Decker V, Goerling B, Spraul M, Godejohann M, Helm PA, Kleywegt S, Jobst K, Soong R, Simpson MJ, Simpson AJ. NMR spectroscopy of wastewater: A review, case study, and future potential. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2021; 126-127:121-180. [PMID: 34852923 DOI: 10.1016/j.pnmrs.2021.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
NMR spectroscopy is arguably the most powerful tool for the study of molecular structures and interactions, and is increasingly being applied to environmental research, such as the study of wastewater. With over 97% of the planet's water being saltwater, and two thirds of freshwater being frozen in the ice caps and glaciers, there is a significant need to maintain and reuse the remaining 1%, which is a precious resource, critical to the sustainability of most life on Earth. Sanitation and reutilization of wastewater is an important method of water conservation, especially in arid regions, making the understanding of wastewater itself, and of its treatment processes, a highly relevant area of environmental research. Here, the benefits, challenges and subtleties of using NMR spectroscopy for the analysis of wastewater are considered. First, the techniques available to overcome the specific challenges arising from the nature of wastewater (which is a complex and dilute matrix), including an examination of sample preparation and NMR techniques (such as solvent suppression), in both the solid and solution states, are discussed. Then, the arsenal of available NMR techniques for both structure elucidation (e.g., heteronuclear, multidimensional NMR, homonuclear scalar coupling-based experiments) and the study of intermolecular interactions (e.g., diffusion, nuclear Overhauser and saturation transfer-based techniques) in wastewater are examined. Examples of wastewater NMR studies from the literature are reviewed and potential areas for future research are identified. Organized by nucleus, this review includes the common heteronuclei (13C, 15N, 19F, 31P, 29Si) as well as other environmentally relevant nuclei and metals such as 27Al, 51V, 207Pb and 113Cd, among others. Further, the potential of additional NMR methods such as comprehensive multiphase NMR, NMR microscopy and hyphenated techniques (for example, LC-SPE-NMR-MS) for advancing the current understanding of wastewater are discussed. In addition, a case study that combines natural abundance (i.e. non-concentrated), targeted and non-targeted NMR to characterize wastewater, along with in vivo based NMR to understand its toxicity, is included. The study demonstrates that, when applied comprehensively, NMR can provide unique insights into not just the structure, but also potential impacts, of wastewater and wastewater treatment processes. Finally, low-field NMR, which holds considerable future potential for on-site wastewater monitoring, is briefly discussed. In summary, NMR spectroscopy is one of the most versatile tools in modern science, with abilities to study all phases (gases, liquids, gels and solids), chemical structures, interactions, interfaces, toxicity and much more. The authors hope this review will inspire more scientists to embrace NMR, given its huge potential for both wastewater analysis in particular and environmental research in general.
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Affiliation(s)
- Maryam Tabatabaei Anaraki
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Daniel H Lysak
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Katelyn Downey
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Flávio Vinicius Crizóstomo Kock
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada; Department of Chemistry, Federal University of São Carlos-SP (UFSCar), São Carlos, SP, Brazil
| | - Xiang You
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Rudraksha D Majumdar
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada; Synex Medical, 2 Bloor Street E, Suite 310, Toronto, ON M4W 1A8, Canada
| | - Andersson Barison
- NMR Center, Federal University of Paraná, CP 19081, 81530-900 Curitiba, PR, Brazil
| | - Luciano Morais Lião
- NMR Center, Institute of Chemistry, Universidade Federal de Goiás, Goiânia 74690-900, Brazil
| | | | - Venita Decker
- Bruker Biospin GmbH, Silberstreifen 4, 76287 Rheinstetten, Germany
| | | | - Manfred Spraul
- Bruker Biospin GmbH, Silberstreifen 4, 76287 Rheinstetten, Germany
| | | | - Paul A Helm
- Environmental Monitoring & Reporting Branch, Ontario Ministry of the Environment, Toronto M9P 3V6, Canada
| | - Sonya Kleywegt
- Technical Assessment and Standards Development Branch, Ontario Ministry of the Environment, Conservation and Parks, Toronto, ON M4V 1M2, Canada
| | - Karl Jobst
- Memorial University of Newfoundland, St. John's, NL A1C 5S7, Canada
| | - Ronald Soong
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Myrna J Simpson
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Andre J Simpson
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada.
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11
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Needham RJ, Prokes I, Habtemariam A, Romero-Canelón I, Clarkson GJ, Sadler PJ. NMR studies of group 8 metallodrugs: 187Os-enriched organo-osmium half-sandwich anticancer complex. Dalton Trans 2021; 50:12970-12981. [PMID: 34581369 PMCID: PMC8477448 DOI: 10.1039/d1dt02213j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report the synthesis of the organo-osmium anticancer complex [Os(η6-p-cym)(N,N-azpy-NMe2)Br]PF6 (1) containing natural abundance 187Os (1.96%), and isotopically-enriched (98%) [187Os]-1. Complex 1 and [187Os]-1 contain a π-bonded para-cymene (p-cym), a chelated 4-(2-pyridylazo)-N,N-dimethylaniline (azpy-NMe2), and a monodentate bromide as ligands. The X-ray crystal structure of 1 confirmed its half-sandwich 'piano-stool' configuration. Complex 1 is a member of a family of potent anticancer complexes, and exhibits sub-micromolar activity against A2780 human ovarian cancer cells (IC50 = 0.40 μM). Complex [187Os]-1 was analysed by high-resolution ESI-MS, 1D 1H and 13C NMR, and 2D 1H COSY, 13C-1H HMQC, and 1H-187Os HMBC NMR spectroscopy. Couplings of 1H and 13C nuclei from the azpy/p-cym ligands to 187Os were observed with J-couplings (1J to 4J) ranging between 0.6-8.0 Hz. The 187Os chemical shift of [187Os]-1 (-4671.3 ppm, determined by 2D 1H-187Os HMBC NMR) is discussed in relation to the range of values reported for related Os(II) arene and cyclopentadienyl complexes (-2000 to -5200 ppm).
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Affiliation(s)
- Russell J Needham
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
| | - Ivan Prokes
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
| | - Abraha Habtemariam
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
| | - Isolda Romero-Canelón
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
| | - Peter J Sadler
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
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12
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Barbanente A, Iacobazzi RM, Azzariti A, Hoeschele JD, Denora N, Papadia P, Pacifico C, Natile G, Margiotta N. New Oxaliplatin-Pyrophosphato Analogs with Improved In Vitro Cytotoxicity. Molecules 2021; 26:3417. [PMID: 34200051 PMCID: PMC8200237 DOI: 10.3390/molecules26113417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/26/2021] [Accepted: 06/01/2021] [Indexed: 11/17/2022] Open
Abstract
Two new Pt(II)-pyrophosphato complexes containing the carrier ligands cis-1,3-diaminocyclohexane (cis-1,3-DACH) and trans-1,2-diamine-4-cyclohexene (1,2-DACHEX), variants of the 1R,2R-diaminocyclohexane ligand present in the clinically used Pt-drug oxaliplatin, have been synthesized with the aim of developing new potential antitumor drugs with high bone tropism. The complexes are more stable at physiological pH than in acid conditions, with Na2[Pt(pyrophosphato)(cis-1,3-DACH)] (1) slightly more stable than [Pt(dihydrogenpyrophosphato)(1,2-DACHEX)] (2). The greater reactivity at acidic pH ensures a greater efficacy at the tumor site. Preliminary NMR studies indicate that 1 and 2 react slowly with 5'-GMP (used as a model of nucleic acids), releasing the pyrophosphate ligand and affording the bis 5'-GMP adduct. In vitro cytotoxicity assays performed against a panel of four human cancer cell lines have shown that both compounds are more active than oxaliplatin. Flow cytometry studies on HCT116 cells showed that the pyrophosphato compounds with the non-classical 1,3- and 1,4-diaminocyclohexane ligands (1 and 4) are the most capable to induce cells' death by apoptosis and necrosis.
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Affiliation(s)
- Alessandra Barbanente
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy; (A.B.); (C.P.); (G.N.)
| | - Rosa Maria Iacobazzi
- Laboratorio di Farmacologia Sperimentale, IRCCS Istituto Tumori “Giovanni Paolo II”, O. Flacco St., 70124 Bari, Italy; (R.M.I.); (A.A.)
| | - Amalia Azzariti
- Laboratorio di Farmacologia Sperimentale, IRCCS Istituto Tumori “Giovanni Paolo II”, O. Flacco St., 70124 Bari, Italy; (R.M.I.); (A.A.)
| | - James D. Hoeschele
- Department of Chemistry, Eastern Michigan University, Ypsilanti, MI 48197, USA;
| | - Nunzio Denora
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy;
| | - Paride Papadia
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Prov.le Lecce-Monteroni, Centro Ecotekne, 73100 Lecce, Italy;
| | - Concetta Pacifico
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy; (A.B.); (C.P.); (G.N.)
| | - Giovanni Natile
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy; (A.B.); (C.P.); (G.N.)
| | - Nicola Margiotta
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy; (A.B.); (C.P.); (G.N.)
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13
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Cox N, Millard P, Charlier C, Lippens G. Improved NMR Detection of Phospho-Metabolites in a Complex Mixture. Anal Chem 2021; 93:4818-4824. [PMID: 33711235 DOI: 10.1021/acs.analchem.0c04056] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Phosphorylated metabolites are omnipresent in cells, but their analytical characterization faces several technical hurdles. Here, we detail an improved NMR workflow aimed at assigning the high-resolution subspectrum of the phospho-metabolites in a complex mixture. Combining a pure absorption J-resolved spectrum (Pell, A. J.; J. Magn. Reson. 2007, 189 (2), 293-299) with alternate on- and off-switching of the 31P coupling interaction during the t1 evolution with a pure in-phase (PIP) HSQMBC experiment (Castañar, L.; Angew. Chem., Int. Ed. 2014, 53 (32), 8379-8382) without or with total correlation spectroscopy (TOCSY) transfer during the insensitive nuclei enhancement by polarization transfer (INEPT) gives access to selective identification of the individual subspectra of the phosphorylated metabolites. Returning to the initial J-res spectra, we can extract with optimal resolution the full trace for the individual phospho-metabolites, which can then be transposed on the high-resolution quantitative one dimensional spectrum.
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Affiliation(s)
- Neil Cox
- TBI, Université de Toulouse, CNRS, INRAE, INSA, 31077 Toulouse, France
| | - Pierre Millard
- TBI, Université de Toulouse, CNRS, INRAE, INSA, 31077 Toulouse, France
| | - Cyril Charlier
- TBI, Université de Toulouse, CNRS, INRAE, INSA, 31077 Toulouse, France
| | - Guy Lippens
- TBI, Université de Toulouse, CNRS, INRAE, INSA, 31077 Toulouse, France
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Ravera M, Gabano E, Zanellato I, Rangone B, Perin E, Ferrari B, Bottone MG, Osella D. Cis,cis,trans-[Pt IVCl 2(NH 3) 2(perillato) 2], a dual-action prodrug with excellent cytotoxic and antimetastatic activity. Dalton Trans 2021; 50:3161-3177. [PMID: 33595015 DOI: 10.1039/d0dt04051g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two Pt(iv) conjugates containing one or two molecules of perillic acid (4-isopropenylcyclohexene-1-carboxylic acid), an active metabolite of limonene, were synthesized both with traditional and microwave-assisted methods and characterized. Their antiproliferative activity was tested on a panel of human tumor cell lines. In particular, cis,cis,trans-[PtIVCl2(NH3)2(perillato)2] exhibited excellent antiproliferative and antimetastatic activity on A-549 lung tumor cells at nanomolar concentrations. A number of in vitro biological tests were performed to decipher some aspects of its mechanism of action, including transwell migration and invasion as well as wound healing assay.
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Affiliation(s)
- Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
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15
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Vaughn BA, Koller AJ, Boros E. Aqueous chemistry of the smallest rare earth: Comprehensive characterization of radioactive and non-radioactive scandium complexes for biological applications. Methods Enzymol 2021; 651:343-371. [PMID: 33888209 DOI: 10.1016/bs.mie.2021.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aqueous chemistry of scandium(III) is of emerging interest for biological applications, specifically in nuclear medicine, as radioactive isotopes of scandium are becoming more readily accessible. In contrast to other rare earths, Sc3+ has no d or f electrons, limiting characterization of corresponding coordination complexes to spectroscopic techniques that do not rely on the characteristic electronic transitions of f-elements or transition metal ions. Herein, we provide a comprehensive overview on characterization techniques suitable to elucidate the solution behavior of small and macromolecular complexes of the smallest rare earth.
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Affiliation(s)
- Brett A Vaughn
- Department of Chemistry, Stony Brook University, Stony Brook, NY, United States
| | - Angus J Koller
- Department of Chemistry, Stony Brook University, Stony Brook, NY, United States
| | - Eszter Boros
- Department of Chemistry, Stony Brook University, Stony Brook, NY, United States.
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16
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Peng WK, Ng TT, Loh TP. Machine learning assistive rapid, label-free molecular phenotyping of blood with two-dimensional NMR correlational spectroscopy. Commun Biol 2020; 3:535. [PMID: 32985608 PMCID: PMC7522972 DOI: 10.1038/s42003-020-01262-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 08/28/2020] [Indexed: 01/02/2023] Open
Abstract
Translation of the findings in basic science and clinical research into routine practice is hampered by large variations in human phenotype. Developments in genotyping and phenotyping, such as proteomics and lipidomics, are beginning to address these limitations. In this work, we developed a new methodology for rapid, label-free molecular phenotyping of biological fluids (e.g., blood) by exploiting the recent advances in fast and highly efficient multidimensional inverse Laplace decomposition technique. We demonstrated that using two-dimensional T1-T2 correlational spectroscopy on a single drop of blood (<5 μL), a highly time- and patient-specific 'molecular fingerprint' can be obtained in minutes. Machine learning techniques were introduced to transform the NMR correlational map into user-friendly information for point-of-care disease diagnostic and monitoring. The clinical utilities of this technique were demonstrated through the direct analysis of human whole blood in various physiological (e.g., oxygenated/deoxygenated states) and pathological (e.g., blood oxidation, hemoglobinopathies) conditions.
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Affiliation(s)
- Weng Kung Peng
- Precision Medicine - Engineering Group, International Iberian Nanotechnology Laboratory, 4715 330, Braga, Portugal.
| | - Tian-Tsong Ng
- Institute for Infocomm Research, Fusionopolis Way, Singapore, Singapore
| | - Tze Ping Loh
- Department of Laboratory Medicine, National University Hospital, Singapore, Singapore.
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17
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Al-Asadi RH, Mohammed MK, Dhaef HK. Mercuration and Telluration of 2-Fluoro-5-nitroaniline: Synthesis, Antibacterial, and Computational Study. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220040222] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Corinti D, Crestoni ME, Fornarini S, Dabbish E, Sicilia E, Gabano E, Perin E, Osella D. A multi-methodological inquiry of the behavior of cisplatin-based Pt(IV) derivatives in the presence of bioreductants with a focus on the isolated encounter complexes. J Biol Inorg Chem 2020; 25:655-670. [PMID: 32296997 DOI: 10.1007/s00775-020-01789-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 03/31/2020] [Indexed: 01/14/2023]
Abstract
The study of Pt(IV) antitumor prodrugs able to circumvent some drawbacks of the conventional Pt(II) chemotherapeutics is the focus of a lot of attention. This paper reports a thorough study based on experimental methods (reduction kinetics, electrochemistry, tandem mass spectrometry and IR ion spectroscopy) and quantum-mechanical DFT calculations on the reduction mechanism of cisplatin-based Pt(IV) derivatives having two hydroxido (1), one hydroxido and one acetato (2), or two acetato ligands (3) in axial position. The biological reductants glutathione and ascorbic acid were taken into consideration. The presence of a hydroxido ligand resulted to play an important role in the chemical reduction with ascorbic acid, as verified by 15N-NMR kinetic analysis using 15N-enriched complexes. The reactivity trend (1 > 2 > 3) does not reflect the respective reduction peak potentials (1 < 2 < 3), an inverse relationship already documented in similar systems. Turning to a simplified environment, the Pt(IV) complexes associated with a single reductant molecule (corresponding to the encounter complex occurring along the reaction coordinate in bimolecular reactions in solution) were characterized by IR ion spectroscopy and sampled for their reactivity under collision-induced dissociation (CID) conditions. The complexes display a comparable reduction reactivity ordering as that observed in solution. DFT calculations of the free energy pathways for the observed fragmentation reactions provide theoretical support for the CID patterns and the mechanistic hypotheses on the reduction process are corroborated by the observed reaction paths. The bulk of these data offers a clue of the intricate pathways occurring in solution.Graphic abstract.
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Affiliation(s)
- Davide Corinti
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, 00185, Rome, Italy.
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, 00185, Rome, Italy
| | - Simonetta Fornarini
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, 00185, Rome, Italy
| | - Eslam Dabbish
- Department of Chemistry and Chemical Technologies, Università della Calabria, Ponte P. Bucci Cubo 14c, 87035, Arcavacata di Rende (CS), Italy.
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, Ponte P. Bucci Cubo 14c, 87035, Arcavacata di Rende (CS), Italy
| | - Elisabetta Gabano
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121, Alessandria, Italy.
| | - Elena Perin
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121, Alessandria, Italy
| | - Domenico Osella
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121, Alessandria, Italy
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19
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Noriega L, Castro ME, Perez-Aguilar JM, Caballero NA, Scior T, Ramírez RE, González-Vergara E, Meléndez FJ. Theoretical study of the stability and NMR spectroscopic properties of vanadium(V) complexes. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2509-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Ravera M, Zanellato I, Gabano E, Perin E, Rangone B, Coppola M, Osella D. Antiproliferative Activity of Pt(IV) Conjugates Containing the Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) Ketoprofen and Naproxen †. Int J Mol Sci 2019; 20:E3074. [PMID: 31238499 PMCID: PMC6627341 DOI: 10.3390/ijms20123074] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/20/2019] [Accepted: 06/22/2019] [Indexed: 02/06/2023] Open
Abstract
Cisplatin and several non-steroidal anti-inflammatory drugs (NSAIDs) have been proven to act synergistically or at least additively on several tumor cell lines. Dual-action cisplatin-based Pt(IV) combos containing ketoprofen and naproxen offer good antiproliferative performance on a panel of human tumor cell lines, including a malignant pleural mesothelioma (MPM) one, a very chemoresistant tumor. The main reason of the increased activity relies on the enhanced lipophilicity of these Pt(IV) conjugates that in turn promotes increased cellular accumulation. A quick Pt(IV)→Pt(II) reduction generates the active cisplatin metabolite. The NSAID adjuvant action seems to be almost independent from cyclooxygenase-2 (COX-2) expression in the tumor cells under investigation (lung A-549, colon HT-29, HCT 116, SW480, ovarian A2780, and biphasic MPM MSTO-211H), but it seems to rely (at least in part) on the activation of the NSAID activated gene, NAG-1 (a member of the transforming growth factor beta, TGF-β, superfamily), which has been suggested to be involved in NSAID antiproliferative activity.
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Affiliation(s)
- Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Ilaria Zanellato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Elisabetta Gabano
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Elena Perin
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Beatrice Rangone
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Marco Coppola
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Domenico Osella
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
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Solov'ev V, Tsivadze A, Marcou G, Varnek A. Classification of Metal Binders by Naïve Bayes Classifier on the Base of Molecular Fragment Descriptors and Ensemble Modeling. Mol Inform 2019; 38:e1900002. [DOI: 10.1002/minf.201900002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 03/15/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Vitaly Solov'ev
- A.N. Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of Sciences, Leninskiy prosp., 31 119071 Moscow Russia
| | - Aslan Tsivadze
- A.N. Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of Sciences, Leninskiy prosp., 31 119071 Moscow Russia
| | - Gilles Marcou
- Laboratoire de Chémoinformatique, UMR 7140 CNRSUniversité de Strasbourg 1, rue Blaise Pascal 67000 Strasbourg France
| | - Alexandre Varnek
- Laboratoire de Chémoinformatique, UMR 7140 CNRSUniversité de Strasbourg 1, rue Blaise Pascal 67000 Strasbourg France
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22
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Gabano E, Ravera M, Perin E, Zanellato I, Rangone B, McGlinchey MJ, Osella D. Synthesis and characterization of cyclohexane-1R,2R-diamine-based Pt(iv) dicarboxylato anticancer prodrugs: their selective activity against human colon cancer cell lines. Dalton Trans 2019; 48:435-445. [PMID: 30539948 DOI: 10.1039/c8dt03950j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three pairs of asymmetric dicarboxylato derivatives based on the cisplatin and oxaliplatin-like skeletons have been synthesized de novo or re-synthesized. The axial ligands consist of one medium-chain fatty acid (MCFA), namely clofibrate (i.e. 2-(p-chlorophenoxy)-2-methylpropionic acid, CA), heptanoate (HA) or octanoate (OA), respectively, and an inactive acetato ligand that imparts acceptable water solubility to such conjugates. Stability tests provided evidence for the partial formation of two hydrolyzed products, corresponding to two monoaqua diastereomers derived from the substitution of an equatorial chlorido ligand with a water molecule. The complexes have been tested on three different colon cancer cell lines having different histological history, and also on the cisplatin-sensitive A2780 ovarian cancer cell line for comparison. This allowed the evaluation not only of the increase in activity on passing from Pt(ii) to Pt(iv) derivatives, but also the selectivity towards colon cancer cells brought about by the cyclohexane-1R,2R-diamine carrier ligand.
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Affiliation(s)
- E Gabano
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
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Itoh T, Tamura K, Ueda H, Tanaka T, Sato K, Kuroda R, Aoki S. Design and synthesis of boron containing monosaccharides by the hydroboration of d-glucal for use in boron neutron capture therapy (BNCT). Bioorg Med Chem 2018; 26:5922-5933. [PMID: 30420329 DOI: 10.1016/j.bmc.2018.10.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/27/2018] [Accepted: 10/29/2018] [Indexed: 01/18/2023]
Abstract
Boron neutron capture therapy (BNCT) is one of the radiotherapies that involves the use of boron-containing compounds for the treatment of cancer. Boron-10 (10B) containing compounds that can accumulate in tumor tissue are expected to be suitable agents for BNCT. We report herein on the design and synthesis of some new BNCT agents based on a d-glucose scaffold, since glycoconjugation has been recognized as a useful strategy for the specific targeting of tumors. To introduce a boryl group into a d-glucose scaffold, we focused on the hydroboration of d-glucal derivatives, which have a double bond between the C1 and C2 positions. It was hypothesized that a C-B bond could be introduced at the C2 position of d-glucose by the hydroboration of d-glucal derivatives and that the products could be stabilized by conversion to the corresponding boronic acid ester. To test this hypothesis, we prepared some 2-boryl-1,2-dideoxy-d-glucose derivatives as boron carriers and evaluated their cytotoxicity and cellular uptake activity to cancer cells, especially under hypoxic conditions.
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Affiliation(s)
- Taiki Itoh
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Kei Tamura
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Hiroki Ueda
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Tomohiro Tanaka
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Kyouhei Sato
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Reiko Kuroda
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Shin Aoki
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; Division of Medical-Science-Engineering Cooperation, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; Imaging Frontier Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
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24
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Trujillo LDC, Jios JL, Franca CA, Güida JA. New NMR investigation of [RuF5NO]2− anion. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.03.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Application of Heteronuclear NMR Spectroscopy to Bioinorganic and Medicinal Chemistry ☆. REFERENCE MODULE IN CHEMISTRY, MOLECULAR SCIENCES AND CHEMICAL ENGINEERING 2018. [PMCID: PMC7157447 DOI: 10.1016/b978-0-12-409547-2.10947-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Gabano E, Ravera M, Trivero F, Tinello S, Gallina A, Zanellato I, Gariboldi MB, Monti E, Osella D. The cisplatin-based Pt(iv)-diclorofibrato multi-action anticancer prodrug exhibits excellent performances also under hypoxic conditions. Dalton Trans 2018; 47:8268-8282. [DOI: 10.1039/c7dt04614f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The cisplatin/clofibrato combos are multi-action Pt(iv) complexes active on a panel of human tumor cell lines, also under hypoxic conditions.
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Affiliation(s)
- Elisabetta Gabano
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Francesca Trivero
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Stefano Tinello
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Andrea Gallina
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Ilaria Zanellato
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Marzia B. Gariboldi
- Dipartimento di Biotecnologie e Scienze della Vita
- Università dell'Insubria
- 21052 Busto Arsizio
- Italy
| | - Elena Monti
- Dipartimento di Biotecnologie e Scienze della Vita
- Università dell'Insubria
- 21052 Busto Arsizio
- Italy
| | - Domenico Osella
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
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27
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Levina A, Crans DC, Lay PA. Speciation of metal drugs, supplements and toxins in media and bodily fluids controls in vitro activities. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.01.002] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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28
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Curci A, Gandin V, Marzano C, Hoeschele JD, Natile G, Margiotta N. Novel Kiteplatin Pyrophosphate Derivatives with Improved Efficacy. Inorg Chem 2017. [PMID: 28636387 DOI: 10.1021/acs.inorgchem.7b00931] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Two new Pt(II) derivatives of kiteplatin ([PtCl2(cis-1,4-DACH)]) with pyrophosphate as carrier ligand, one mononuclear (1) and one dinuclear (2), were synthesized with the aim of potentiating the efficacy of kiteplatin. Complex 1 resulted to be remarkably stable at physiological pH, but it undergoes a fast hydrolysis reaction at acidic pH releasing free pyrophosphate and (aquated) kiteplatin. The dinuclear compound 2 resulted to be less stable than 1 at both neutral and acidic pH forming 1 and (aquated) kiteplatin as first step. Both compounds (1 and 2) do not react as such with 5'-GMP, whereas their hydrolysis products readily form adducts with the nucleotide. The in vitro cytotoxicity assays against a panel of six human cancer cell lines showed that complex 2 affects cancer cell viability even at nanomolar concentrations. The cytotoxic activity of 2 is greater (up to 2 orders of magnitude) than that of cisplatin, oxaliplatin, and kiteplatin, whereas the mononuclear complex 1 has shown a cytotoxic activity comparable to that of oxaliplatin and kiteplatin, but higher than cisplatin. The latter result is not surprising, since the presence of two negative charges reduces the uptake of 1 into the tumor cells as compared to the neutral compound 2. The remarkable activity of 2 against the pancreatic cell line BxPC3 (average IC50 = 0.07 μM) deserves further investigation.
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Affiliation(s)
- Alessandra Curci
- Department of Chemistry, University of Bari Aldo Moro , Via E. Orabona 4, 70125 Bari, Italy
| | - Valentina Gandin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua , Via Marzolo 5, 35131 Padova, Italy
| | - Cristina Marzano
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua , Via Marzolo 5, 35131 Padova, Italy
| | - James D Hoeschele
- Department of Chemistry, Eastern Michigan University , 48197 Ypsilanti, Michigan, United States
| | - Giovanni Natile
- Department of Chemistry, University of Bari Aldo Moro , Via E. Orabona 4, 70125 Bari, Italy
| | - Nicola Margiotta
- Department of Chemistry, University of Bari Aldo Moro , Via E. Orabona 4, 70125 Bari, Italy
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29
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Lim JYC, Marques I, Thompson AL, Christensen KE, Félix V, Beer PD. Chalcogen Bonding Macrocycles and [2]Rotaxanes for Anion Recognition. J Am Chem Soc 2017; 139:3122-3133. [PMID: 28140582 DOI: 10.1021/jacs.6b12745] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Electron-deficient heavy chalcogen atoms contain Lewis acidic σ-holes which are able to form attractive supramolecular interactions, known as chalcogen bonding (ChB), with Lewis bases. However, their potential in solution-phase anion binding applications is only just beginning to be realized in simple acyclic systems. Herein, we explore the 5-(methylchalcogeno)-1,2,3-triazole (chalcogen = Se, Te) motif as a novel ChB donor for anion binding. Other than being chemically robust enough to be incorporated into macrocyclic structures, thereby significantly expanding the scope and complexity of ChB host systems, we also demonstrate, by 1H NMR and DFT calculations, that the chalcogen atoms oriented within the macrocycle cavity are able to chelate copper(I) endotopically. Exploiting this property, the first examples of mechanically interlocked [2]rotaxanes containing ChB-donor groups are prepared via an active metal template strategy. Solution-phase 1H NMR and molecular modeling studies provide compelling evidence for the dominant influence of ChB in anion binding by these interlocked host systems. In addition, unprecedented charge-assisted ChB-mediated anion binding was also studied in aqueous solvent mixtures, which revealed considerable differences in anion recognition behavior in comparison with chalcogen-free host analogues. Moreover, DFT calculations and molecular dynamics simulations in aqueous solvent mixtures indicate that the selectivity is determined by the different hydrophilic characters of the anions allied to the hydration of the binding units in the presence of the anions. Exploiting the NMR-active nuclei of the ChB-donor chalcogen atoms, heteronuclear 77Se and 125Te NMR were used to directly study how anion recognition influences the local electronic environment of the chalcogen atoms in the mechanically bonded rotaxane binding sites in organic and aqueous solvent mixtures.
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Affiliation(s)
- Jason Y C Lim
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | | | - Amber L Thompson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Kirsten E Christensen
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | | | - Paul D Beer
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
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30
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Ravera M, Gabano E, Zanellato I, Fregonese F, Pelosi G, Platts JA, Osella D. Antiproliferative activity of a series of cisplatin-based Pt(IV)-acetylamido/carboxylato prodrugs. Dalton Trans 2016; 45:5300-9. [PMID: 26903367 DOI: 10.1039/c5dt04905a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report studies of a novel series of Pt(IV) complexes exhibiting an asymmetric combination of acetylamido and carboxylato ligands in the axial positions. We demonstrate efficient synthesis of a series of analogues, differing in the alkyl chain length and hence lipophilicity, from a stable acetylamido/hydroxido complex formed by reaction of cisplatin with peroxyacetimidic acid (PAIA). NMR spectroscopy and X-ray crystallography confirm the identity of the resulting complexes, and highlight subtle differences in the structure and stability of acetylamido complexes compared to the equivalent acetato complexes. Reduction of acetylamido complexes, whether achieved chemically or electro-chemically, is significantly more difficult than that of acetate complexes, resulting in lower antiproliferative activity for shorter-chain complexes. For those with longer chains and hence greater cell uptake, this difference is negated and acetylamido complexes are as active as acetato analogues, both exhibiting antiproliferative potency (1/IC50) against A2780 ovarian cancer cells similar to that of cisplatin.
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Affiliation(s)
- Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy.
| | - Elisabetta Gabano
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy.
| | - Ilaria Zanellato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy.
| | - Federico Fregonese
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy.
| | - Giorgio Pelosi
- Dipartimento di Chimica, Università di Parma, Parco Area delle Scienze, 17/A, 43124 Parma, Italy
| | - James A Platts
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK
| | - Domenico Osella
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy.
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31
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Amolegbe SA, Akinremi CA, Adewuyi S, Lawal A, Bamigboye MO, Obaleye JA. Some nontoxic metal-based drugs for selected prevalent tropical pathogenic diseases. J Biol Inorg Chem 2016; 22:1-18. [DOI: 10.1007/s00775-016-1421-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Accepted: 11/18/2016] [Indexed: 02/04/2023]
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32
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Tanaka T, Araki R, Saido T, Abe R, Aoki S. 11B NMR/MRI Sensing of Copper(II) Ions In Vitro by the Decomposition of a Hybrid Compound of anido-o-Carborane and a Metal Chelator. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600346] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Tomohiro Tanaka
- Faculty of Pharmaceutical Sciences; Tokyo University of Science; 2641 Yamazaki 278-8510 Noda Japan
| | - Rikita Araki
- Bruker Biospin K. K.; 3-9 Kanagawa-ku Moriya-cho 221-0022 Yokohama Japan
| | - Takaomi Saido
- Laboratory for Proteolytic Neuroscience; RIKEN Brain Science Institute; 2-1 Hirosawa 351-0198 Wako Saitama Japan
| | - Ryo Abe
- Research Institute for Biomedical Sciences; Tokyo University of Science; 2641 Yamazaki 278-8510 Noda Japan
| | - Shin Aoki
- Faculty of Pharmaceutical Sciences; Tokyo University of Science; 2641 Yamazaki 278-8510 Noda Japan
- Imaging Frontier Center; Research Institute for Science and Technology; Tokyo University of Science; 2641 Yamazaki 278-8510 Noda Japan
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33
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Santos ADDC, Bliumkin L, Masoom H, Soong R, Barison A, Simpson AJ. Spectral background from commercially available D2 O: an important consideration for trace analysis using cryoprobes. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2016; 54:377-381. [PMID: 26858015 DOI: 10.1002/mrc.4410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 12/23/2015] [Indexed: 06/05/2023]
Affiliation(s)
- Alan D da C Santos
- NMR Center, Federal University of Paraná, CP 19081, 81530-900, Curitiba, PR, Brazil
| | - Liora Bliumkin
- Environmental NMR Centre, University of Toronto Scarborough, Toronto, Canada, MIC1A4
| | - Hussain Masoom
- Environmental NMR Centre, University of Toronto Scarborough, Toronto, Canada, MIC1A4
| | - Ronald Soong
- Environmental NMR Centre, University of Toronto Scarborough, Toronto, Canada, MIC1A4
| | - Andersson Barison
- NMR Center, Federal University of Paraná, CP 19081, 81530-900, Curitiba, PR, Brazil
| | - André J Simpson
- Environmental NMR Centre, University of Toronto Scarborough, Toronto, Canada, MIC1A4
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34
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Nanostructured materials functionalized with metal complexes: In search of alternatives for administering anticancer metallodrugs. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.01.001] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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35
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Tanaka T, Nishiura Y, Araki R, Saido T, Abe R, Aoki S. 11B NMR Probes of Copper(II): Finding and Implications of the Cu2+-Promoted Decomposition ofortho-Carborane Derivatives. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600117] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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36
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Ramos ML, Justino LLG, Abreu PE, Fonseca SM, Burrows HD. Oxocomplexes of Mo(VI) and W(VI) with 8-hydroxyquinoline-5-sulfonate in solution: structural studies and the effect of the metal ion on the photophysical behaviour. Dalton Trans 2015; 44:19076-89. [PMID: 26498366 DOI: 10.1039/c5dt03473f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multinuclear ((1)H, (13)C, (95)Mo and (183)W) NMR spectroscopy, combined with DFT calculations, provides detailed information on the complexation between the Mo(VI) and W(VI) oxoions and 8-hydroxyquinoline-5-sulfonate (8-HQS) in aqueous solution. Over the concentration region studied, Mo(VI) and W(VI) oxoions form three homologous complexes with 8-HQS in water in the pH range 2-8. Two of these, detected at pH < 6, are mononuclear 1 : 2 (metal : ligand) isomers, with the metal centre (MO2(2+)) coordinated to two 8-HQS ligands. An additional complex, dominant at slightly higher pH values (5-8) for solutions with a 1 : 1 metal : ligand molar ratio, has a binuclear M2O5(2+) centre coordinated to two 8-HQS ligands. The two metal atoms are bridged by three oxygen atoms, two coming from 8-HQS, together with the M-O-M bridge of the bimetallic centre. We show that the long-range exchange corrected BOP functional with local response dispersion (LCBOPLRD), together with explicit solvent molecules, leads to geometries that readily converge to equilibrium structures having realistic bridging O8-HQS-M bonds. Previous attempts to calculate the structures of such binuclear complexes using DFT with the B3LYP functional have failed due to difficulties in treating the weak interaction in these bridged structures. We believe that the LCBOPLRD method may be of more general application in theoretical studies in related binuclear metal complexes. UV/visible absorption and luminescence spectra of all the complexes have also been recorded. The complex between Mo(vi) and 8-HQS is only weakly luminescent, in contrast to what has been observed with this ligand and many other metal ions. We suggest that this is due to the presence of low-lying ligand-to-metal charge transfer (LMCT) states close to the emitting ligand-based level which quench the emission. However, with W(VI), DFT calculations show that the LMCT states are now much higher in energy than the ligand based levels, leading to a marked increase in fluorescence.
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Affiliation(s)
- M Luísa Ramos
- Centro de Química and Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
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37
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Zou T, Sadler PJ. Speciation of precious metal anti-cancer complexes by NMR spectroscopy. DRUG DISCOVERY TODAY. TECHNOLOGIES 2015; 16:7-15. [PMID: 26547416 DOI: 10.1016/j.ddtec.2015.08.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 07/30/2015] [Accepted: 08/05/2015] [Indexed: 06/05/2023]
Abstract
Understanding the mechanism of action of anti-cancer agents is of paramount importance for drug development. NMR spectroscopy can provide insights into the kinetics and thermodynamics of the binding of metallodrugs to biomolecules. NMR is most sensitive for highly abundant I=1/2 nuclei with large magnetic moments. Polarization transfer can enhance NMR signals of insensitive nuclei at physiologically-relevant concentrations. This paper reviews NMR methods for speciation of precious metal anti-cancer complexes, including platinum-group and gold-based anti-cancer agents. Examples of NMR studies involving interactions with DNA and proteins in particular are highlighted.
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Affiliation(s)
- Taotao Zou
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Peter J Sadler
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
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38
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The complexation of metal ions with various organic ligands in water: prediction of stability constants by QSPR ensemble modelling. J INCL PHENOM MACRO 2015. [DOI: 10.1007/s10847-015-0543-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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39
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Ogawa S, Morikawa MA, Juhász G, Kimizuka N. Interlocked dimerization of C3-Symmetrical boron difluoride complex: designing non-cooperative supramolecular materials for luminescent thin films. RSC Adv 2015. [DOI: 10.1039/c5ra11908a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Radially integrated, luminescent boron difluoride complexes form inter-locked dimers in chloroform. The inter-locked dimers show anti-cooperative features and give homogeneous thin-films on solid surfaces.
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Affiliation(s)
- Shigesaburo Ogawa
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Kyushu University
- Japan
| | - Masa-aki Morikawa
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Kyushu University
- Japan
- Center for Molecular Systems (CMS)
| | - Gergely Juhász
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Kyushu University
- Japan
| | - Nobuo Kimizuka
- Department of Chemistry and Biochemistry
- Graduate School of Engineering
- Kyushu University
- Japan
- Center for Molecular Systems (CMS)
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40
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Tomé LIN, Sousa CSR, Gomes JRB, Ferreira O, Coutinho JAP, Pinho SP. Understanding the cation specific effects on the aqueous solubility of amino acids: from mono to polyvalent cations. RSC Adv 2015. [DOI: 10.1039/c5ra00501a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Based on solubility and molecular dynamics studies, a consistent and refined molecular description of the effect of the cation on the solubility of amino acids based on specific interactions of the cations with the negatively charged moieties of the biomolecules is proposed.
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Affiliation(s)
- L. I. N. Tomé
- CICECO
- Departamento de Química
- Universidade de Aveiro
- 3810-193 Aveiro
- Portugal
| | - C. S. R. Sousa
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM
- Instituto Politécnico de Bragança
- Bragança
- Portugal
| | - J. R. B. Gomes
- CICECO
- Departamento de Química
- Universidade de Aveiro
- 3810-193 Aveiro
- Portugal
| | - O. Ferreira
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM
- Instituto Politécnico de Bragança
- Bragança
- Portugal
| | - J. A. P. Coutinho
- CICECO
- Departamento de Química
- Universidade de Aveiro
- 3810-193 Aveiro
- Portugal
| | - S. P. Pinho
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM
- Instituto Politécnico de Bragança
- Bragança
- Portugal
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41
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Jackson MN, Kamunde-Devonish MK, Hammann BA, Wills LA, Fullmer LB, Hayes SE, Cheong PHY, Casey WH, Nyman M, Johnson DW. An overview of selected current approaches to the characterization of aqueous inorganic clusters. Dalton Trans 2015. [DOI: 10.1039/c5dt01268f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
This Perspective highlights several modern characterization techniques used to identify nanoscale inorganic clusters in the context of multiple case studies.
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Affiliation(s)
- Milton N. Jackson
- Department of Chemistry & Biochemistry and the Materials Science Institute
- University of Oregon
- Eugene
- USA
| | | | - Blake A. Hammann
- Department of Chemistry
- Washington University
- St. Louis
- Missouri 63130-4899
- USA
| | | | | | - Sophia E. Hayes
- Department of Chemistry
- Washington University
- St. Louis
- Missouri 63130-4899
- USA
| | | | - William H. Casey
- Department of Chemistry
- Department of Earth Science
- University of California
- Davis
- USA
| | - May Nyman
- Department of Chemistry
- Oregon State University
- Corvallis
- USA
| | - Darren W. Johnson
- Department of Chemistry & Biochemistry and the Materials Science Institute
- University of Oregon
- Eugene
- USA
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42
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Lüning A, Neugebauer M, Lingen V, Krest A, Stirnat K, Deacon GB, Drago PR, Ott I, Schur J, Pantenburg I, Meyer G, Klein A. Platinum Diolefin Complexes - Synthesis, Structures, and Cytotoxicity. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402954] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Garino C, Borfecchia E, Gobetto R, van Bokhoven JA, Lamberti C. Determination of the electronic and structural configuration of coordination compounds by synchrotron-radiation techniques. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.03.027] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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44
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Ferreira MF, Pereira G, André JP, Prata MIM, Ferreira PMT, Martins JA, Geraldes CFGC. Ga[NO2A-N-(α-amino)propionate] chelates: synthesis and evaluation as potential tracers for 68Ga PET. Dalton Trans 2014; 43:8037-47. [DOI: 10.1039/c4dt00386a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A reversible pH-trigged N3O3⇆N4O2 coordination isomerism was demonstrated for the Ga[NO2A-N-(α-amino)propionate] chelate in the pH range 4–6.
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Affiliation(s)
| | - Goretti Pereira
- Centro de Química (CQ-UM)
- Universidade do Minho
- 4710-057 Braga, Portugal
| | - João P. André
- Centro de Química (CQ-UM)
- Universidade do Minho
- 4710-057 Braga, Portugal
| | - M. I. M. Prata
- ICNAS and IBILI
- Faculty of Medicine
- University of Coimbra
- 3000-548 Coimbra, Portugal
| | | | - José A. Martins
- Centro de Química (CQ-UM)
- Universidade do Minho
- 4710-057 Braga, Portugal
| | - Carlos F. G. C. Geraldes
- Department of Life Sciences
- Faculty of Science and Technology
- University of Coimbra
- 3001-401 Coimbra, Portugal
- Chemistry Centre
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45
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Lüning A, Schur J, Hamel L, Ott I, Klein A. Strong Cytotoxicity of Organometallic Platinum Complexes with Alkynyl Ligands. Organometallics 2013. [DOI: 10.1021/om400293u] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Anna Lüning
- Department
für Chemie, Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
| | - Julia Schur
- Institute
of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstraße
55, D-38106 Braunschweig, Germany
| | - Laura Hamel
- Institute
of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstraße
55, D-38106 Braunschweig, Germany
| | - Ingo Ott
- Institute
of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstraße
55, D-38106 Braunschweig, Germany
| | - Axel Klein
- Department
für Chemie, Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
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46
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Bresson C, Chartier F, Ansoborlo E, Ortega R. Analytical tools for speciation in the field of toxicology. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.2013.2046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Abstract
The knowledge of the speciation of elements at trace and ultra-trace level, in biological and environmental media is essential to acquire a better understanding of the mechanisms of toxicity, transport and accumulation in which they are involved. Determining the speciation of an element in a given medium is challenging and requires the knowledge of different methodological approaches: the calculation approach and the experimental approach through the use of dedicated analytical and spectroscopic tools. In this framework, this mini-review reports the approaches to investigate the speciation of elements in biological and environmental media as well as the experimental techniques of speciation analysis, illustrated by recent examples. The main analytical and spectroscopic techniques to obtain structural, molecular, elemental and isotopic information are described. A brief overview of separation techniques coupled with spectrometric techniques is given. Imaging and micro-localisation techniques, which aim at determining the in situ spatial distribution of elements and molecules in various solid samples, are also presented. The last part deals with the development of micro-analytical systems, since they open crucial perspectives to speciation analysis for low sample amounts and analysis on field.
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47
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Ramos ML, de Sousa ARE, Justino LLG, Fonseca SM, Geraldes CFGC, Burrows HD. Structural and photophysical studies on gallium(iii) 8-hydroxyquinoline-5-sulfonates. Does excited state decay involve ligand photolabilisation? Dalton Trans 2013; 42:3682-94. [PMID: 23299787 DOI: 10.1039/c2dt32587j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- M Luísa Ramos
- Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal.
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48
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Abstract
Metal ions are indispensable for ribonucleic acids (RNAs) folding and activity. First they act as charge neutralization agents, allowing the RNA molecule to attain the complex active three dimensional structure. Second, metal ions are eventually directly involved in function. Nuclear magnetic resonance (NMR) spectroscopy offers several ways to study the RNA-metal ion interactions at an atomic level. Here, we first focus on special requirements for NMR sample preparation for this kind of experiments: the practical aspects of in vitro transcription and purification of small (<50 nt) RNA fragments are described, as well as the precautions that must be taken into account when a sample for metal ion titration experiments is prepared. Subsequently, we discuss the NMR techniques to accurately locate and characterize metal ion binding sites in a large RNA. For example, (2) J-[(1)H,(15)N]-HSQC (heteronuclear single quantum coherence) experiments are described to qualitatively distinguish between different modes of interaction. Finally, part of the last section is devoted to data analysis; this is how to calculate intrinsic affinity constants.
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49
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Wu G, Zhu J. NMR studies of alkali metal ions in organic and biological solids. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2012; 61:1-70. [PMID: 22340207 DOI: 10.1016/j.pnmrs.2011.06.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Accepted: 05/31/2011] [Indexed: 05/31/2023]
Affiliation(s)
- Gang Wu
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada.
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Pawlak T, Munzarová ML, Pazderski L, Marek R. Validation of Relativistic DFT Approaches to the Calculation of NMR Chemical Shifts in Square-Planar Pt2+ and Au3+ Complexes. J Chem Theory Comput 2011; 7:3909-23. [DOI: 10.1021/ct200366n] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomasz Pawlak
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90363 Łódź, Poland
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland
| | | | - Leszek Pazderski
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland
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