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Tolbatov I, Marrone A. Reactivity of N-Heterocyclic Carbene Half-Sandwich Ru-, Os-, Rh-, and Ir-Based Complexes with Cysteine and Selenocysteine: A Computational Study. Inorg Chem 2021; 61:746-754. [PMID: 34894670 DOI: 10.1021/acs.inorgchem.1c03608] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The structure and the reactivity of four half-sandwich metal complexes of RuII, OsII, RhIII, and IrIII were investigated by means of density functional theory approaches. These piano-stool complexes, grouped in cym-bound complexes, RuII(cym)(dmb)Cl2, 1, and OsII(cym)(dmb)Cl2, 2, and Cp*-bound complexes, RhIII(Cp*)(dmb)Cl2, 3, and IrIII(Cp*)(dmb)Cl2, 4, with cym = η6-p-cymene, Cp* = η5-pentamethylcyclopentadienyl, and dmb = 1,3-dimethylbenzimidazol-2-ylidene, were recently proposed as anticancer metallodrugs that preferably target Cys- or Sec-containing proteins. Thus, density functional theory calculations were performed here to characterize in detail the thermodynamics and the kinetics underlining the targeting of these metallodrugs at either neutral or anionic Cys and Sec side chains. Calculations evidenced that all these complexes preferably target at Cys or Sec via chloro exchange, although cym-bound and Cp*-bound complexes resulted to be more prone to bind at neutral or anionic forms, respectively, of these soft protein sites. Further decomposition analyses of the activation free energies for the reaction between 1-4 complexes and either Cys or Sec, paralleled with the comparison among the optimized transition-state structures, allowed us to spotlight the significant role played by solvation in determining the overall reactivity and selectivity expected for these prototypical metallodrugs.
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Affiliation(s)
- Iogann Tolbatov
- Institut de Chimie Moleculaire de l'Université de Bourgogne (ICMUB), Université de Bourgogne Franche-Comté (UBFC), Avenue Alain Savary 9, 25000 Dijon, France
| | - Alessandro Marrone
- Dipartimento di Farmacia, Università degli Studi "G. D'Annunzio" Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
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Cziferszky M, Truong D, Hartinger CG, Gust R. Determination of Relative Stabilities of Metal-Peptide Bonds in the Gas Phase. Chemistry 2021; 27:16401-16406. [PMID: 34554615 PMCID: PMC9298285 DOI: 10.1002/chem.202102385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Indexed: 11/09/2022]
Abstract
Understanding binding site preferences in biological systems as well as affinities to binding partners is a crucial aspect in metallodrug development. We here present a mass spectrometry‐based method to compare relative stabilities of metal‐peptide adducts in the gas phase. Angiotensin 1 and substance P were used as model peptides. Incubation with isostructural N‐heterocyclic carbene (NHC) complexes of RuII, OsII, RhIII, and IrIII led to the formation of various adducts, which were subsequently studied by energy‐resolved fragmentation experiments. The gas‐phase stability of the metal‐peptide bonds depended on the metal and the binding partner. Of the four complexes used, the OsII derivative bound strongest to Met, while RuII formed the most stable coordination bond with His. RhIII was identified as the weakest peptide binder and IrIII formed peptide adducts with intermediate stability. Probing these intrinsic gas‐phase properties can help in the interpretation of biological activities and the design of site‐specific protein binding metal complexes.
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Affiliation(s)
- Monika Cziferszky
- Department of Chemistry and Pharmacy, Institute of Pharmacy, University of Innsbruck, Innrain 80-82, A-6020, Innsbruck, Austria
| | - Dianna Truong
- School of Chemical Sciences, University of Auckland Private Bag, 92019, Auckland 1142, New Zealand
| | - Christian G Hartinger
- School of Chemical Sciences, University of Auckland Private Bag, 92019, Auckland 1142, New Zealand
| | - Ronald Gust
- Department of Chemistry and Pharmacy, Institute of Pharmacy, University of Innsbruck, Innrain 80-82, A-6020, Innsbruck, Austria
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Tao J, Jia S, Wang M, Huang Z, Wang B, Zhang W, Wei Y, Li W, Jiang H, Du Z. Systematic Identification of Proteins Binding with Cisplatin in Blood by Affinity Chromatography and a Four-Dimensional Proteomic Method. J Proteome Res 2021; 20:4553-4565. [PMID: 34427088 DOI: 10.1021/acs.jproteome.1c00535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cisplatin is widely used for the treatment of various solid tumors. It is mainly administered by intravenous injection, and a substantial amount of the drug will bind to plasma proteins, a feature that is closely related to its pharmacokinetics, activity, toxicity, and side effects. However, due to the unique properties of platinum complexes and the complexity of the blood proteome, existing methods cannot systematically identify the binding proteome of cisplatin in blood. In this study, high-abundance protein separation and an ion mobility mass spectrometry-based 4D proteomic method were combined to systematically and comprehensively identify the binding proteins of cisplatin in blood. The characteristic isotope patterns of platinated peptides and a similarity algorithm were utilized to eliminate false-positive identification. Finally, 39 proteins were found to be platinated. Bioinformatics analysis showed that the identified proteins were mainly involved in the complement and coagulation cascade pathways. The binding ratio of some peptides with cisplatin was measured based on the area ratio of the free peptide using the parallel reaction monitoring method. This study provides a new method for systematically identifying binding proteins of metal drugs in blood, and the identified proteins might be helpful for understanding the toxicity of platinum anticancer drugs.
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Affiliation(s)
- Jianmei Tao
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Shuailong Jia
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430030, Hubei Province, PR China
| | - Meiqin Wang
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Zhuobin Huang
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Bo Wang
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Wenwen Zhang
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Yinyu Wei
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Wenzhuo Li
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Hongliang Jiang
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
| | - Zhifeng Du
- School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, Hubei Province, PR China
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Bernier CM, DuChane CM, Martinez JS, Falkinham JO, Merola JS. Synthesis, Characterization, and Antimicrobial Activity of Rh III and Ir III N-Heterocyclic Carbene Piano-Stool Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00166] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Chad M. Bernier
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Christine M. DuChane
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Justin S. Martinez
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Joseph O. Falkinham
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Joseph S. Merola
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
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The Protein-Binding Behavior of Platinum Anticancer Drugs in Blood Revealed by Mass Spectrometry. Pharmaceuticals (Basel) 2021; 14:ph14020104. [PMID: 33572935 PMCID: PMC7911130 DOI: 10.3390/ph14020104] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 02/06/2023] Open
Abstract
Cisplatin and its analogues are widely used as chemotherapeutic agents in clinical practice. After being intravenously administrated, a substantial amount of platinum will bind with proteins in the blood. This binding is vital for the transport, distribution, and metabolism of drugs; however, toxicity can also occur from the irreversible binding between biologically active proteins and platinum drugs. Therefore, it is very important to study the protein-binding behavior of platinum drugs in blood. This review summarizes mass spectrometry-based strategies to identify and quantitate the proteins binding with platinum anticancer drugs in blood, such as offline high-performance liquid chromatography/inductively coupled plasma mass spectrometry (HPLC–ICP-MS) combined with electrospray ionization mass spectrometry (ESI-MS/MS) and multidimensional LC–ESI-MS/MS. The identification of in vivo targets in blood cannot be accomplished without first studying the protein-binding behavior of platinum drugs in vitro; therefore, relevant studies are also summarized. This knowledge will further our understanding of the pharmacokinetics and toxicity of platinum anticancer drugs, and it will be beneficial for the rational design of metal-based anticancer drugs.
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Advances in novel iridium (III) based complexes for anticancer applications: A review. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119925] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Chiu CKC, Lam YPY, Wootton CA, Barrow MP, Sadler PJ, O'Connor PB. Metallocomplex-Peptide Interactions Studied by Ultrahigh Resolution Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:594-601. [PMID: 31967804 DOI: 10.1021/jasms.9b00054] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The OsII arene anticancer complex [(η6-bip)Os(en)Cl]+ (Os1-Cl; where bip = biphenyl and en = ethylenediamine) binds strongly to DNA1 and biomolecules. Here we investigate the interaction between Os1-Cl and the model protein, BSA, using ultrahigh resolution Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS). The specific binding location of Os1 on BSA was investigated with the use of collisionally activated dissociation (CAD) and electron capture dissociation (ECD). CAD MS/MS was found to dissociate the osmium complex from the metallo-peptide complex readily producing unmodified fragments and losing location information. ECD MS/MS, however, successfully retains the osmium modification on the peptides upon fragmentation allowing localization of metallocomplex binding. This study reveals that lysine is a possible binding location for Os1-Cl, apart from the expected binding sites at methionine, histidine, and cysteine. Using a nano liquid chromatography (nLC)-FT-ICR ECD MS/MS study, multiple binding locations, including the N-terminus and C-terminus of digested peptides, glutamic acid, and lysine were also revealed. These results show the multitargeting binding ability of the organo-osmium compound and can be used as a standard workflow for more complex systems, e.g., metallocomplex-cell MS analysis, to evaluate their behavior toward commonly encountered biomolecules.
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Affiliation(s)
- Cookson K C Chiu
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Yuko P Y Lam
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Christopher A Wootton
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Mark P Barrow
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Peter J Sadler
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Peter B O'Connor
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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Cziferszky M, Gust R. Top-down mass spectrometry reveals multiple interactions of an acetylsalicylic acid bearing Zeise's salt derivative with peptides. J Biol Inorg Chem 2020; 25:285-293. [PMID: 32060649 PMCID: PMC7082381 DOI: 10.1007/s00775-020-01760-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/24/2020] [Indexed: 11/30/2022]
Abstract
Synergistic effects and promising anticancer activities encourage the combination of non-steroidal anti-inflammatory drugs with metallodrugs. Here, we discuss the interactions of an organometallic complex consisting of an acetylsalicylic acid (ASA) moiety attached to a PtII center via an alkenol linker in a Zeise's salt-type coordination (ASA-buten-PtCl3) with model peptides angiotensin 1 (AT), substance P (Sub P), and ubiquitin (UQ). Top-down mass spectrometry experiments show that the amino acid involved in the initial binding to the metal complex controls the coordination sphere of PtII in the adducts. The strong trans labilizing effect of the coordinating sulfur atom in Met causes fast release of the organic moiety and leads to the formation of dimers and oligomers in the case of Sub P. In contrast, interactions with nitrogen donors in AT result in stable adducts containing the intact ASA-buten-PtII complex. UQ forms two sets of PtII adducts, only one of them retains the ASA moiety, which is presumably the result of an unexpected binding geometry. Importantly, UQ is additionally acetylated at various Ser and Lys residues by the ASA-buten-PtCl3 complex. Control experiments with ASA are negative. This is the first example of concomitant platination and acetylation of a peptide with an ASA metal complex.
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Affiliation(s)
- Monika Cziferszky
- Department of Pharmaceutical Chemistry, CMBI-Center for Molecular Biosciences, CCB-Centrum for Chemistry and Biomedicine, Innsbruck, Institute of Pharmacy, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Ronald Gust
- Department of Pharmaceutical Chemistry, CMBI-Center for Molecular Biosciences, CCB-Centrum for Chemistry and Biomedicine, Innsbruck, Institute of Pharmacy, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria.
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