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Chiavarino B, Rotari L, Crestoni ME, Corinti D, Fornarini S, Scuderi D, Salpin JY. Binding Motifs of Carboplatin and Oxaliplatin with Guanine: A Combined MS/MS, IRMPD, and Theoretical Study. Inorg Chem 2023; 62:14546-14558. [PMID: 37647164 DOI: 10.1021/acs.inorgchem.3c01438] [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: 09/01/2023]
Abstract
Complexes generated in the gas phase involving the purine nucleobase guanine bound to second and third generation platinum drugs, namely, carboplatin (CarboPt) and oxaliplatin (OxaliPt), were investigated by combining tandem mass spectrometry, collision-induced dissociation (CID), infrared multiple photon dissociation spectroscopy (IRMPD), and density functional theory (DFT) calculations. As the first step, a spectroscopic characterization of the protonated platinum drugs was accomplished. Protonation of both CarboPt and OxaliPt in the gas phase occurs on one of the two carbonyl groups of the cyclobutanedicarboxylate and oxalate ligand, respectively. Such protonation has been postulated by several theoretical studies as a key preliminary step in the hydrolysis of Pt drugs under acidic conditions. Subsequently, the protonated drugs react with guanine in solution to generate a complex of general formula [Pt drug + H + guanine]+, which was then mass-selected. CID experiments provided evidence of the presence of strong binding between guanine and platinum-based drugs within the complexes. The structures of the two complexes have also been examined by comparing the experimental IRMPD spectra recorded in two spectral regions with DFT-computed IR spectra. For each system, the IRMPD spectra agree with the vibrational spectra calculated for the global minimum structures, which present a monodentate complexation of Pt at the N7 position of canonical guanine. This binding scheme is therefore akin to that observed for cisplatin, while other coordination sites yield substantially less stable species. Interestingly, in the case of oxaliplatin, the IRMPD spectra are consistent with the presence of two isomeric forms very close in energy.
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Affiliation(s)
- Barbara Chiavarino
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, Roma I-00185, Italy
| | - Lucretia Rotari
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, Roma I-00185, Italy
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, Roma I-00185, Italy
| | - Davide Corinti
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, Roma I-00185, Italy
| | - Simonetta Fornarini
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma "La Sapienza", P.le A. Moro 5, Roma I-00185, Italy
| | - Debora Scuderi
- CNRS, Institut de Chimie Physique, Université Paris-Saclay, Orsay 91405, France
| | - Jean-Yves Salpin
- Université Paris-Saclay, Univ Evry, CY Cergy Paris Université, CNRS, LAMBE, Evry-Courcouronnes 91025, France
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Ritacco I, Sicilia E, Shoeib T, Korany M, Russo N. Mass Spectrometric and Computational Investigation of the Protonated Carnosine-Carboplatin Complex Fragmentation. Inorg Chem 2015; 54:7885-97. [PMID: 26238420 DOI: 10.1021/acs.inorgchem.5b00959] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Platinum(II)-based anticancer drugs are square-planar d(8) complexes that, activated by hydrolysis, cause cancer cell death by binding to nuclear DNA and distorting its structure. For that reason, interactions of platinum anticancer drugs with DNA have been extensively investigated, aiming at disentangling the mechanism of action and toxicity. Less attention, however, has been devoted to the formation of adducts between platinum drugs with biological ligands other than DNA. These adducts can cause the loss and deactivation of the drug before it arrives at the ultimate target and are also thought to contribute to the drug's toxicity. Here are reported the outcomes of electrospray ionization mass spectrometry experiments and density functional theory (DFT) computations carried out to investigate the fragmentation pathways of the protonated carnosine-carboplatin complex, [Carnosine + CarbPt + H](+). DFT calculations at the B3LYP/LANL2DZ level employed to probe fragmentation mechanisms account for all experimental data. Because of the relative rigidity of the structure of the most stable 1A conformer, stabilized by three strong hydrogen bonds, the first step of all of the examined fragmentation pathways is the interconversion of the 1A conformer into the less stable structure 1B. Formation of the [Carnosine + H](+) fragment from the precursor ion, [Carnosine + CarbPt + H](+), is calculated to be the lowest-energy process. At slightly higher energies, the loss of two amino groups is observed to produce the [Carnosine + (CarbPt - NH3) + H](+) and [Carnosine + (CarbPt - 2NH3) + H](+) ions. At significantly higher energies, the loss of CO2 occurs, yielding the final [Carnosine + (CarbPt - NH3) - CO2 + H](+) and [Carnosine + (CarbPt - 2NH3) - CO2 + H](+) products. Formation of the [CarbPt + H](+) fragment from [Carnosine + CarbPt + H](+), even if not hampered by a high activation barrier, is calculated to be very unfavorable from a thermodynamic point of view.
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Affiliation(s)
- Ida Ritacco
- †Dipartimento di Chimica e Tecnologie Chmiche, Università della Calabria, I-87036 Arcavacata di Rende, Italy
| | - Emilia Sicilia
- †Dipartimento di Chimica e Tecnologie Chmiche, Università della Calabria, I-87036 Arcavacata di Rende, Italy
| | - Tamer Shoeib
- ‡Department of Chemistry, The American University in Cairo, New Cairo 11835, Egypt.,§Centre for Analytical Science, Department of Chemistry, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K
| | - Mohamed Korany
- ‡Department of Chemistry, The American University in Cairo, New Cairo 11835, Egypt
| | - Nino Russo
- †Dipartimento di Chimica e Tecnologie Chmiche, Università della Calabria, I-87036 Arcavacata di Rende, Italy
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Ritacco I, Moustafa EM, Sicilia E, Russo N, Shoeib T. Fragmentation pathways analysis for the gas phase dissociation of protonated carnosine-oxaliplatin complexes. Dalton Trans 2015; 44:4455-67. [DOI: 10.1039/c4dt02217c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Collision-induced dissociation (CID) experiments on the protonated carnosine-oxaliplatin complex were shown to yield nine different fragment ions. Density functional calculations were employed to probe the fragmentation mechanisms that account for all experimental data.
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Affiliation(s)
- Ida Ritacco
- Dipartimento di Chimica UniVersita della Calabria
- Via P. Bucci
- cubo 14c
- 87036 Arca Vacata di Rende (CS)
- Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR
| | - Eslam M. Moustafa
- Department of Chemistry
- The American University in Cairo
- New Cairo 11835
- Egypt
| | - Emilia Sicilia
- Dipartimento di Chimica UniVersita della Calabria
- Via P. Bucci
- cubo 14c
- 87036 Arca Vacata di Rende (CS)
- Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR
| | - Nino Russo
- Dipartimento di Chimica UniVersita della Calabria
- Via P. Bucci
- cubo 14c
- 87036 Arca Vacata di Rende (CS)
- Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite - Centro d'Eccellenza MIUR
| | - Tamer Shoeib
- Department of Chemistry
- The American University in Cairo
- New Cairo 11835
- Egypt
- Centre for Analytical Science
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Carnosine complexes and binding energies to some biologically relevant metals and platinum containing anticancer drugs. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.05.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Bach SBH, Sepeda TG, Merrill GN, Walmsley JA. Complexes of dibromo(ethylenediamine)-palladium(II) observed from aqueous solutions by electrospray mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2005; 16:1461-1469. [PMID: 16024254 DOI: 10.1016/j.jasms.2005.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Revised: 04/13/2005] [Accepted: 04/16/2005] [Indexed: 05/03/2023]
Abstract
The dimeric complex of dibromo(ethylenediamine)palladium(II) observed in water was investigated using electrospray mass spectrometry. One microM aqueous solutions of Pd(en)Br2 yielded a variety of previously unreported species. The most abundant ion observed was attributable to the Pd(en)Br2.Pd(en)Br+ dimeric complex at m/z 568.7 (most abundant stable isotopes). The characteristics of the oligomeric complexes were examined using collision-induced dissociation (CID) up to MS6. The most common loss mechanism observed was loss of HBr leaving an unsaturated Pd(II) center. Fragmentation of the ethylenediamine ligand was also observed during CID experiments. Loss of Pd was only observed as the final step in the CID process when other loss mechanisms had been exhausted. A number of calculations were carried out at the B3-LYP/SBKJC[d] level of theory in an attempt to elucidate the structure of the [2M-Br]+ dimer.
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Affiliation(s)
- Stephan B H Bach
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA.
| | - Tiffanee G Sepeda
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA
| | - Grant N Merrill
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA
| | - Judith A Walmsley
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA
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Alcamí M, Luna A, Mó O, Yáñez M, Tortajada J. Theoretical Survey of the Potential Energy Surface of Ethylenediamine + Cu+ Reactions. J Phys Chem A 2004. [DOI: 10.1021/jp048915d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manuel Alcamí
- Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Alberto Luna
- Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Otilia Mó
- Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Manuel Yáñez
- Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Jeanine Tortajada
- Laboratoire Analyze et Environnement, UMR CNRS 8587, Université d’Evry Val d'Essonne, Institut des Sciences, Boulevard François Mitterrand, 91025 Evry Cedex, France
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Electrospray mass spectrometry of Pt(II) amidine complexes of the type cis- and trans-[PtCl2{NHC(R)NR′R″}2] and trans-[PtCl2(RCN){NHC(R)NR′R″}]. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(03)00489-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Current literature in mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2001; 36:347-354. [PMID: 11312528 DOI: 10.1002/jms.90] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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