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Kacsir I, Sipos A, Major E, Bajusz N, Bényei A, Buglyó P, Somsák L, Kardos G, Bai P, Bokor É. Half-Sandwich Type Platinum-Group Metal Complexes of C-Glucosaminyl Azines: Synthesis and Antineoplastic and Antimicrobial Activities. Molecules 2023; 28:molecules28073058. [PMID: 37049820 PMCID: PMC10096180 DOI: 10.3390/molecules28073058] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/22/2023] [Accepted: 03/23/2023] [Indexed: 04/01/2023] Open
Abstract
While platinum-based compounds such as cisplatin form the backbone of chemotherapy, the use of these compounds is limited by resistance and toxicity, driving the development of novel complexes with cytostatic properties. In this study, we synthesized a set of half-sandwich complexes of platinum-group metal ions (Ru(II), Os(II), Ir(III) and Rh(III)) with an N,N-bidentate ligand comprising a C-glucosaminyl group and a heterocycle, such as pyridine, pyridazine, pyrimidine, pyrazine or quinoline. The sugar-containing ligands themselves are unknown compounds and were obtained by nucleophilic additions of lithiated heterocycles to O-perbenzylated 2-nitro-glucal. Reduction of the adducts and, where necessary, subsequent protecting group manipulations furnished the above C-glucosaminyl heterocycles in their O-perbenzylated, O-perbenzoylated and O-unprotected forms. The derived complexes were tested on A2780 ovarian cancer cells. Pyridine, pyrazine and pyridazine-containing complexes proved to be cytostatic and cytotoxic on A2780 cells, while pyrimidine and quinoline derivatives were inactive. The best complexes contained pyridine as the heterocycle. The metal ion with polyhapto arene/arenyl moiety also impacted on the biological activity of the complexes. Ruthenium complexes with p-cymene and iridium complexes with Cp* had the best performance in ovarian cancer cells, followed by osmium complexes with p-cymene and rhodium complexes with Cp*. Finally, the chemical nature of the protective groups on the hydroxyl groups of the carbohydrate moiety were also key determinants of bioactivity; in particular, O-benzyl groups were superior to O-benzoyl groups. The IC50 values of the complexes were in the low micromolar range, and, importantly, the complexes were less active against primary, untransformed human dermal fibroblasts; however, the anticipated therapeutic window is narrow. The bioactive complexes exerted cytostasis on a set of carcinomas such as cell models of glioblastoma, as well as breast and pancreatic cancers. Furthermore, the same complexes exhibited bacteriostatic properties against multiresistant Gram-positive Staphylococcus aureus and Enterococcus clinical isolates in the low micromolar range.
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Affiliation(s)
- István Kacsir
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
- Doctoral School of Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Adrienn Sipos
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Egyetem Tér 1., H-4032 Debrecen, Hungary
- The Hungarian Academy of Sciences, Center of Excellence, Hungary
- MTA-DE Cell Biology and Signaling Research Group ELKH, H-4032 Debrecen, Hungary
| | - Evelin Major
- Department of Metagenomics, University of Debrecen, H-4032 Debrecen, Hungary
| | - Nikolett Bajusz
- Department of Metagenomics, University of Debrecen, H-4032 Debrecen, Hungary
| | - Attila Bényei
- Department of Physical Chemistry, Faculty of Sciences and Technology, University of Debrecen, Egyetem Tér 1., H-4032 Debrecen, Hungary
| | - Péter Buglyó
- Department of Inorganic & Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, Egyetem Tér 1., H-4032 Debrecen, Hungary
| | - László Somsák
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Gábor Kardos
- Department of Metagenomics, University of Debrecen, H-4032 Debrecen, Hungary
| | - Péter Bai
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Egyetem Tér 1., H-4032 Debrecen, Hungary
- The Hungarian Academy of Sciences, Center of Excellence, Hungary
- MTA-DE Cell Biology and Signaling Research Group ELKH, H-4032 Debrecen, Hungary
- NKFIH-DE Lendület Laboratory of Cellular Metabolism, H-4032 Debrecen, Hungary
- Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
- Correspondence: (P.B.); (É.B.); Tel.: +36-524-123-45 (P.B.); +36-525-129-00 (ext. 22474) (É.B.)
| | - Éva Bokor
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
- Correspondence: (P.B.); (É.B.); Tel.: +36-524-123-45 (P.B.); +36-525-129-00 (ext. 22474) (É.B.)
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Bíró L, Tóth B, Lihi N, Farkas E, Buglyó P. Interaction between [(η 6- p-cym)M(H 2O) 3] 2+ (M II = Ru, Os) or [(η 5-Cp*)M(H 2O) 3] 2+ (M III = Rh, Ir) and Phosphonate Derivatives of Iminodiacetic Acid: A Solution Equilibrium and DFT Study. Molecules 2023; 28:molecules28031477. [PMID: 36771142 PMCID: PMC9918899 DOI: 10.3390/molecules28031477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/29/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
The pH-dependent binding strengths and modes of the organometallic [(η6-p-cym)M(H2O)3]2+ (MII = Ru, Os; p-cym = 1-methyl-4-isopropylbenzene) or [(η5-Cp*)M(H2O)3]2+ (MIII = Rh, Ir; Cp* = pentamethylcyclopentadienyl anion) cations towards iminodiacetic acid (H2Ida) and its biorelevant mono- and diphosphonate derivatives N-(phosphonomethyl)-glycine (H3IdaP) and iminodi(methylphosphonic acid) (H4Ida2P) was studied in an aqueous solution. The results showed that all three of the ligands form 1:1 complexes via the tridentate (O,N,O) donor set, for which the binding mode was further corroborated by the DFT method. Although with IdaP3- and Ida2P4- in mono- and bis-protonated species, where H+ might also be located at the non-coordinating N atom, the theoretical calculations revealed the protonation of the phosphonate group(s) and the tridentate coordination of the phosphonate ligands. The replacement of one carboxylate in Ida2- by a phosphonate group (IdaP3-) resulted in a significant increase in the stability of the metal complexes; however, this increase vanished with Ida2P4-, which was most likely due to some steric hindrance upon the coordination of the second large phosphonate group to form (5 + 5) joined chelates. In the phosphonate-containing systems, the neutral 1:1 complexes are the major species at pH 7.4 in the millimolar concentration range that is supported by both NMR and ESI-TOF-MS.
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Kacsir I, Sipos A, Kiss T, Major E, Bajusz N, Tóth E, Buglyó P, Somsák L, Kardos G, Bai P, Bokor É. Half sandwich-type osmium, ruthenium, iridium and rhodium complexes with bidentate glycosyl heterocyclic ligands induce cytostasis in platinum-resistant ovarian cancer cells and bacteriostasis in Gram-positive multiresistant bacteria. Front Chem 2023; 11:1086267. [PMID: 36793764 PMCID: PMC9923724 DOI: 10.3389/fchem.2023.1086267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 01/05/2023] [Indexed: 01/31/2023] Open
Abstract
The toxicity of and resistance to platinum complexes as cisplatin, oxaliplatin or carboplatin calls for the replacement of these therapeutic agents in clinical settings. We have previously identified a set of half sandwich-type osmium, ruthenium and iridium complexes with bidentate glycosyl heterocyclic ligands exerting specific cytostatic activity on cancer cells but not on non-transformed primary cells. The apolar nature of the complexes, conferred by large, apolar benzoyl protective groups on the hydroxyl groups of the carbohydrate moiety, was the main molecular feature to induce cytostasis. We exchanged the benzoyl protective groups to straight chain alkanoyl groups with varying length (3 to 7 carbon units) that increased the IC50 value as compared to the benzoyl-protected complexes and rendered the complexes toxic. These results suggest a need for aromatic groups in the molecule. The pyridine moiety of the bidentate ligand was exchanged for a quinoline group to enlarge the apolar surface of the molecule. This modification decreased the IC50 value of the complexes. The complexes containing [(η6-p-cymene)Ru(II)], [(η6-p-cymene)Os(II)] or [(η5-Cp*)Ir(III)] were biologically active unlike the complex containing [(η5-Cp*)Rh(III)]. The complexes with cytostatic activity were active on ovarian cancer (A2780, ID8), pancreatic adenocarcinoma (Capan2), sarcoma (Saos) and lymphoma cell lines (L428), but not on primary dermal fibroblasts and their activity was dependent on reactive oxygen species production. Importantly, these complexes were cytostatic on cisplatin-resistant A2780 ovarian cancer cells with similar IC50 values as on cisplatin-sensitive A2780 cells. In addition, the quinoline-containing Ru and Os complexes and the short chain alkanoyl-modified complexes (C3 and C4) proved to be bacteriostatic in multiresistant Gram-positive Enterococcus and Staphylococcus aureus isolates. Hereby, we identified a set of complexes with submicromolar to low micromolar inhibitory constants against a wide range of cancer cells, including platinum resistant cells and against multiresistant Gram-positive bacteria.
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Affiliation(s)
- István Kacsir
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary,Doctoral School of Chemistry, University of Debrecen, Debrecen, Hungary
| | - Adrienn Sipos
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tímea Kiss
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary
| | - Evelin Major
- Department of Metagenomics, University of Debrecen, Debrecen, Hungary
| | - Nikolett Bajusz
- Department of Metagenomics, University of Debrecen, Debrecen, Hungary
| | - Emese Tóth
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, Debrecen, Hungary
| | - László Somsák
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary
| | - Gábor Kardos
- Department of Metagenomics, University of Debrecen, Debrecen, Hungary
| | - Péter Bai
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary,NKFIH-DE Lendület Laboratory of Cellular Metabolism, Debrecen, Hungary,Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary,MTA-DE Cell Biology and Signaling Research Group ELKH, Debrecen, Hungary,*Correspondence: Péter Bai, ; Éva Bokor,
| | - Éva Bokor
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary,*Correspondence: Péter Bai, ; Éva Bokor,
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Bíró L, Ozsváth A, Kapitány R, Buglyó P. Pd(II) Binding Strength of a Novel Ambidentate Dipeptide-Hydroxypyridinonate Ligand: A Solution Equilibrium Study. Molecules 2022; 27:molecules27144667. [PMID: 35889540 PMCID: PMC9324670 DOI: 10.3390/molecules27144667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/07/2022] [Accepted: 07/12/2022] [Indexed: 12/04/2022] Open
Abstract
A novel ambidentate dipeptide conjugate (H(L1)) containing N-donor atoms of the peptide part and an (O,O) chelate at the hydroxypyridinone (HP) ring is synthesized and characterized. It is hoped that this chelating ligand can be useful to obtain multitargeted Co(III)/Pt(II) dinuclear complexes with anticancer potential. The Pd(II) (as a Pt(II) model but with faster ligand exchange reactions) binding strength of the ligand was studied in an aqueous solution with the combined use of pH-potentiometry and NMR. In an equimolar solution, (L1)− was found to bind Pd(II) via the terminal amino and increasing number of peptide nitrogens of the peptide backbone over a wide pH range. At a 2:1 Pd(II) to ligand ratio, the presence of [Pd2H–x(L1)] (x = 1–4) species, with high stability and with the coordination of the (O,O) chelating set of the ligand, was detected. The reaction of H(L1) with [Co(tren)]3+ (tren = tris(2-aminoethyl)amine) indicated the exclusive binding of (L1)− via its (O,O) donor atoms to the metal unit, while treatment of the resulting Co-complex with Pd(II) afforded the formation of a Co/Pd heterobimetallic complex in solution with an (NH2, Namide) coordination of Pd(II). Shortening the peptide backbone in H(L1) by one peptide unit compared to the structurally similar ambidentate chelator consisting of three peptide bonds resulted in the slightly more favorable formation of the N-coordinated Pd(II) species, allowing the tailoring of the coordination properties.
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Balázs B, Tóth Z, Kacsir I, Sipos A, Buglyó P, Somsák L, Bokor É, Kardos G, Bai P. Targeting Multiresistant Gram-Positive Bacteria by Ruthenium, Osmium, Iridium and Rhodium Half-Sandwich Type Complexes With Bidentate Monosaccharide Ligands. Front Chem 2022; 10:868234. [PMID: 35494644 PMCID: PMC9039051 DOI: 10.3389/fchem.2022.868234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/08/2022] [Indexed: 11/13/2022] Open
Abstract
Bacterial resistance to antibiotics is an ever-growing problem in heathcare. We have previously identified a set of osmium(II), ruthenium(II), iridium(III) and rhodium(III) half-sandwich type complexes with bidentate monosaccharide ligands possessing cytostatic properties against carcinoma, lymphoma and sarcoma cells with low micromolar or submicromolar IC50 values. Importantly, these complexes were not active on primary, non-transformed cells. These complexes have now been assessed as to their antimicrobial properties and found to be potent inhibitors of the growth of reference strains of Staphylococcus aureus and Enterococcus faecalis (Gram-positive species), though the compounds proved inactive on reference strains of Pseudomonas aerugonisa, Escherichia coli, Candida albicans, Candida auris and Acinetobacter baumannii (Gram-negative species and fungi). Furthermore, clinical isolates of Staphylococcus aureus and Enterococcus sp. (both multiresistant and susceptible strains) were also susceptible to the organometallic complexes in this study with similar MIC values as the reference strains. Taken together, we identified a set of osmium(II), ruthenium(II), iridium(III) and rhodium(III) half-sandwich type antineoplastic organometallic complexes which also have antimicrobial activity among Gram-positive bacteria. These compounds represent a novel class of antimicrobial agents that are not detoxified by multiresistant bacteria suggesting a potential to be used to combat multiresistant infections.
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Affiliation(s)
- Bence Balázs
- Department of Metagenomics, University of Debrecen, Debrecen, Hungary
| | - Zoltán Tóth
- Department of Metagenomics, University of Debrecen, Debrecen, Hungary
| | - István Kacsir
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary
- Doctoral School of Chemistry, University of Debrecen, Debrecen, Hungary
| | - Adrienn Sipos
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, Debrecen, Hungary
| | - László Somsák
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary
| | - Éva Bokor
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary
- *Correspondence: Éva Bokor, ; Gábor Kardos, ; Péter Bai,
| | - Gábor Kardos
- Department of Metagenomics, University of Debrecen, Debrecen, Hungary
- *Correspondence: Éva Bokor, ; Gábor Kardos, ; Péter Bai,
| | - Péter Bai
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- NKFIH-DE Lendület Laboratory of Cellular Metabolism, Debrecen, Hungary
- Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- *Correspondence: Éva Bokor, ; Gábor Kardos, ; Péter Bai,
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Bíró L, Buglyó P, Farkas E. Diversity in the Interaction of Amino Acid- and Peptide-Based Hydroxamic Acids with Some Platinum Group Metals in Solution. Molecules 2022; 27:molecules27030669. [PMID: 35163937 PMCID: PMC8839353 DOI: 10.3390/molecules27030669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/12/2022] [Accepted: 01/17/2022] [Indexed: 11/29/2022]
Abstract
Complexes that incorporate both ligand(s) and metal(s) exhibiting cytotoxic activity can especially be interesting to develop multifunctional drug molecules with desired activities. In this review, the limited number of solution results collected in our laboratory on the complexes of Pd(II) and two other platinum group metals—the half-sandwich type, [(η6-p-cym)Ru(H2O)3]2+, and [(η5-Cp*)Rh(H2O)3]2+—with hydroxamic acid derivatives of three amino acids, two imidazole analogues, and four small peptides are summarized and evaluated. Unlike the limited number of coordination sites of these metal ions (four and three for Pd(II) and the organometallic cations, respectively), the ligands discussed here offer a relatively high number of donor atoms as well as variation in their position within the ligands, resulting in a large versatility of the likely coordination modes. The review, besides presenting the solution equilibrium results, also discusses the main factors, such as (N,N) versus (O,O) chelate; size of chelate; amino-N versus imidazole-N; primary versus secondary hydroxamic function; differences between hydrolytic ability of the metal ions studied; and hydrolysis of the coordinated peptide hydroxamic acids in their Pd(II) complexes, which all determine the coordination modes present in the complexes formed in measurable concentrations in these systems. The options for the quantitative evaluation of metal binding effectivity and selectivity of the various ligands and the comparison with each other by using solution equilibrium data are also discussed.
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Kacsir I, Sipos A, Ujlaki G, Buglyó P, Somsák L, Bai P, Bokor É. Ruthenium Half-Sandwich Type Complexes with Bidentate Monosaccharide Ligands Show Antineoplastic Activity in Ovarian Cancer Cell Models through Reactive Oxygen Species Production. Int J Mol Sci 2021; 22:ijms221910454. [PMID: 34638791 PMCID: PMC8508960 DOI: 10.3390/ijms221910454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/17/2021] [Accepted: 09/23/2021] [Indexed: 12/16/2022] Open
Abstract
Ruthenium complexes are developed as substitutes for platinum complexes to be used in the chemotherapy of hematological and gynecological malignancies, such as ovarian cancer. We synthesized and screened 14 ruthenium half-sandwich complexes with bidentate monosaccharide ligands in ovarian cancer cell models. Four complexes were cytostatic, but not cytotoxic on A2780 and ID8 cells. The IC50 values were in the low micromolar range (the best being 0.87 µM) and were similar to or lower than those of the clinically available platinum complexes. The active complexes were cytostatic in cell models of glioblastoma, breast cancer, and pancreatic adenocarcinoma, while they were not cytostatic on non-transformed human skin fibroblasts. The bioactive ruthenium complexes showed cooperative binding to yet unidentified cellular target(s), and their activity was dependent on reactive oxygen species production. Large hydrophobic protective groups on the hydroxyl groups of the sugar moiety were needed for biological activity. The cytostatic activity of the ruthenium complexes was dependent on reactive species production. Rucaparib, a PARP inhibitor, potentiated the effects of ruthenium complexes.
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Affiliation(s)
- István Kacsir
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary; (I.K.); (L.S.)
- Doctoral School of Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Adrienn Sipos
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (A.S.); (G.U.)
| | - Gyula Ujlaki
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (A.S.); (G.U.)
| | - Péter Buglyó
- Department of Inorganic & Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, H-4032 Debrecen, Hungary;
| | - László Somsák
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary; (I.K.); (L.S.)
| | - Péter Bai
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (A.S.); (G.U.)
- NKFIH-DE Lendület Laboratory of Cellular Metabolism, H-4032 Debrecen, Hungary
- Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
- Correspondence: (P.B.); (É.B.)
| | - Éva Bokor
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary; (I.K.); (L.S.)
- Correspondence: (P.B.); (É.B.)
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Nagy S, Ozsváth A, Bényei AC, Farkas E, Buglyó P. Donor Atom Preference of Organoruthenium and Organorhodium Cations on the Interaction with Novel Ambidentate (N,N) and (O,O) Chelating Ligands in Aqueous Solution. Molecules 2021; 26:molecules26123586. [PMID: 34208223 PMCID: PMC8230953 DOI: 10.3390/molecules26123586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/04/2021] [Accepted: 06/04/2021] [Indexed: 11/16/2022] Open
Abstract
Two novel, pyridinone-based chelating ligands containing separated (O,O) and (Namino,Nhet) chelating sets (Namino = secondary amine; Nhet = pyrrole N for H(L3) (1-(3-(((1H-pyrrole-2-yl)methyl)-amino)propyl)-3-hydroxy-2-methylpyridin-4(1H)-one) or pyridine N for H(L5) (3-hydroxy-2-methyl-1-(3-((pyridin-2-ylmethyl)amino)propyl)pyridin-4(1H)-one)) were synthesized via reduction of the appropriate imines. Their proton dissociation processes were explored, and the molecular structures of two synthons were assessed by X-ray crystallography. These ambidentate chelating ligands are intended to develop Co(III)/PGM (PGM = platinum group metal) heterobimetallic multitargeted complexes with anticancer potential. To explore their metal ion binding ability, the interaction with Pd(II), [(η6-p-cym)Ru]2+ and [(η5-Cp*)Rh]2+ (p-cym = 1-methyl-4-isopropylbenzene, Cp* = pentamethyl-cyclopentadienyl anion) cations was studied in aqueous solution with the combined use of pH-potentiometry, NMR and HR ESI-MS. In general, organorhodium was found to form more labile complexes over ruthenium, while complexation of the (N,N) chelating set was slower than the processes of the pyridinone unit with (O,O) coordination. Formation of the organoruthenium complexes starts at lower pH (higher thermodynamic stabilities of the corresponding complexes) than for [(η5-Cp*)Rh]2+ but, due to the higher affinity of [η6-p-cym)Ru]2+ towards hydrolysis, the complexed ligands are capable of competing with hydroxide ion in a lesser extent than for the rhodium systems. As a result, under biologically relevant conditions, the rhodium binding effectivity of the ligands becomes comparable or even slightly higher than their effectivity towards ruthenium. Our results indicate that H(L3) is a less efficient (N,N) chelator for these metal ions than H(L5). Similarly, due to the relative effectivity of the (O,O) and (N,N) chelates at a 1:1 metal-ion-to-ligand ratio, H(L5) coordinates in a (N,N) manner to both cations in the whole pH range studied while, for H(L3), the complexation starts with (O,O) coordination. At a 2:1 metal-ion-to-ligand ratio, H(L3) cannot hinder the intensive hydrolysis of the second metal ion, although a small amount of 2:1 complex with [(η5-Cp*)Rh]2+ can also be detected.
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Affiliation(s)
- Sándor Nagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary; (S.N.); (A.O.); (E.F.)
| | - András Ozsváth
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary; (S.N.); (A.O.); (E.F.)
| | - Attila Cs. Bényei
- Department of Physical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary;
| | - Etelka Farkas
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary; (S.N.); (A.O.); (E.F.)
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary; (S.N.); (A.O.); (E.F.)
- Correspondence:
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Ozsváth A, Diószegi R, Bényei AC, Buglyó P. Pd(ii)-Complexes of a novel pyridinone based tripeptide conjugate: solution and solid state studies. Dalton Trans 2021; 49:9254-9267. [PMID: 32555805 DOI: 10.1039/d0dt01396j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A novel peptide conjugate (H(L2)) incorporating N-donors of the peptide backbone and an (O,O) donor set of a hydroxypyridinone moiety is synthesized and characterized. This ambidentate chelating ligand is intended to develop Co(iii)/Pt(ii) heterobimetallic multitargeted complexes with anticancer potential. To explore its metal ion binding ability the interaction with Pd(ii) (as a Pt(ii) model but with faster ligand exchange reactions) was studied in aqueous solution by the combined use of pH-potentiometry, NMR and HR MS. In an equimolar solution H(L2) was found to bind Pd(ii) via the terminal amino group and increasing number of peptide nitrogens of the peptide backbone over a wide pH range. Around physiological pH an (N,N) and (O,O) chelated 2 : 2 minor species was also identified. At a 2 : 1 Pd(ii) to ligand ratio the formation of dinuclear species, [Pd2H-x(L2)] (x = 1-4), with high stability and with the involvement of the (O,O) chelating set of the ligand too, was demonstrated. Reaction of H3(L2)2+ with Pd(ii) in the presence of chloride ions at pH ∼ 2.0 afforded [PdH(L2)Cl2]·2H2O (3) in a solid state whose molecular structure was assessed by single crystal X-ray diffraction. The structure of 3 revealed that Pd(ii) is coordinated by a (NH2, Namide) chelate of the ligand in a square planar fashion. It also indicates that under suitable conditions a 2N coordinated Pd(ii) complex can also be obtained even in the presence of four available nitrogen donors in the chelatable position in the ligand most likely due to its neutral charge and the decreased conditional stability of the amide-involved chelate(s) under acidic conditions. Reaction of H(L2) with [Co(tren)]3+ (tren = tris(2-aminoethyl)amine) revealed the exclusive coordination of (L2)-via its (O,O) chelate to the metal core while treatment of the Co-complex with Pd(ii) resulted in the formation of a Co/Pd heterobimetallic complex in solution with (NH2, Namide) chelated Pd(ii). Reaction of 3 with 9-methylguanine indicated the N7 coordination of this simple DNA model to Pd(ii) in a 1 : 1 ratio.
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Affiliation(s)
- András Ozsváth
- Department of Inorganic & Analytical Chemistry, University of Debrecen, Egyetem tér 1., H-4032 Debrecen, Hungary.
| | - Róbert Diószegi
- Department of Inorganic & Analytical Chemistry, University of Debrecen, Egyetem tér 1., H-4032 Debrecen, Hungary.
| | - Attila Csaba Bényei
- Department of Physical Chemistry, University of Debrecen, Egyetem tér 1., H-4032 Debrecen, Hungary
| | - Péter Buglyó
- Department of Inorganic & Analytical Chemistry, University of Debrecen, Egyetem tér 1., H-4032 Debrecen, Hungary.
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10
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Farkas E, Bíró L, Buglyó P. Factors determining the metal ion binding ability and selectivity of hydroxamate based compounds. Curr Med Chem 2021; 28:7209-7237. [PMID: 33820511 DOI: 10.2174/0929867328666210405123952] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 11/22/2022]
Abstract
There has been a long tradition for a broad spectrum of applications of both natural and synthetic hydroxamic acids and derivatives. Even nowadays, a huge number of newly designed representatives (from different monohydroxamate-based compounds to siderophore conjugates) are intended to develop potential drug candidates with desired activities. Since these compounds are effective metal-chelating agents their biological roles and actions as well as their various applications e.g. in the medicinal practice are all in direct correlation with their metal complexation. Consequently, the knowledge of the stoichiometry and binding modes of metal complexes with hydroxamic acid based ligands, their thermodynamic parameters, speciation profiles in solution is crucial for scientists working at any of the above-mentioned fields. This review, in addition to presenting a few factors, which might affect the metal binding capabilities of these organic ligands, displays and summarizes the different parameters typically used to give the stoichiometry/composition and stability of the species formed in a solution equilibrium system in measurable concentration. Discussion of the possibilities for quantitative comparison of metal binding effectivity and selectivity of various hydroxamic acids with each other by using solution equilibrium data is also in the focus of this publication.
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Affiliation(s)
- Etelka Farkas
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen. Hungary
| | - Linda Bíró
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen. Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen. Hungary
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11
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Kozsup M, Zhou X, Farkas E, Bényei AC, Bonnet S, Patonay T, Kónya K, Buglyó P. Synthesis, characterization and cytotoxicity studies of Co(III)-flavonolato complexes. J Inorg Biochem 2021; 217:111382. [PMID: 33588278 DOI: 10.1016/j.jinorgbio.2021.111382] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/27/2021] [Accepted: 01/27/2021] [Indexed: 11/29/2022]
Abstract
Hypoxia activated Co(III) complexes as prodrugs may provide with a selective delivery of cytotoxic or antibacterial compounds. Whithin this field sixteen novel Co(III) ternary complexes with the general formula [Co(4N)(flav)](ClO4)2, where 4N = tris(2-aminoethyl)amine (tren) or tris(2-pyridylmethyl)amine (tpa) and flav = deprotonated form of differently substituted flavonols have been synthesized, characterized, and their cytotoxicity assayed under both normoxic and hypoxic conditions. Molecular structures of two free flavonols and seven complexes are also reported. In all the complexes the bioligands exhibited the expected (O,O) coordination mode and the complexes showed a slightly distorted octahedral geometry. Cyclic voltammetric studies revealed that both the substituents of the flavonoles and the type of 4N donor ligands had an impact on the reduction potential of the complex. The ones containing tren demonstrated significantly higher stability than the tpa analogues, making these former compounds promising candidates for the development of hypoxia-activated prodrug complexes. Tpa complexes showed higher activity against both selected human cancer cell lines (A549, A431) than their free ligand flavonols, indicating that the anticancer activity of the bioligand can be enhanced upon complexation. However, slight hypoxia-selectivity was found only for a tren complex (11) with moderate cytotoxicity.
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Affiliation(s)
- Máté Kozsup
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - XueQuan Zhou
- Leiden Institute of Chemistry, Universiteit Leiden, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - Etelka Farkas
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Attila Cs Bényei
- Department of Physical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Sylvestre Bonnet
- Leiden Institute of Chemistry, Universiteit Leiden, Einsteinweg 55, 2333 CC Leiden, the Netherlands
| | - Tamás Patonay
- Department of Organic Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Krisztina Kónya
- Department of Organic Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary.
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12
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Nagy S, Tóth E, Kacsir I, Makai A, Bényei AC, Buglyó P. Effect of the replacement of tripodal 4N donors by two 2N chelators on the redox and cytotoxic activity of maltolato and deferipronato containing Co(III) complexes. J Inorg Biochem 2021; 220:111372. [PMID: 33962134 DOI: 10.1016/j.jinorgbio.2021.111372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 11/17/2022]
Abstract
Fourteen novel CoIII ternary complexes with the general formula [Co(4N)(2O)]X2 or [Co(2N)2(2O)]X2 where 4N = tris(2-aminoethyl)amine (tren) or tris(2-pyridylmethyl)amine (tpa); 2N = 1,10-phenantroline (phen), 2,2'-bipyridine (bipy), 1,2-diaminoethane (en) or 2-(aminomethyl)pyridine (ampy) and 2O = 1,2-dimethyl-3-hydroxy-4(1H)-pyridinone (dhpH), 3-hydroxy-2-methyl-4-pyrone (maltH) or 2-ethyl-3-hydroxy-4H-pyran-4-one (etmaltH) were synthesized, characterized and their redox features explored. Molecular structure of some selected [Co(2N)2(2O)](ClO4)2 (2N = phen, bipy, en; 2O = dhp, malt) or [Co(4N)(2O)](ClO4)2 (4N = tpa; 2O = etmalt) type complexes were assessed by X-ray diffraction and showed the expected octahedral geometry. Replacement of the 4N donor ligands by two 2N donor ligands resulted in the decrease of the cathodic peak potential of the complexes indicating easier reduction and allowing therefore the tailoring of the redox properties of the complexes. Screening of selected compounds against a human derived cancer cell line, HeLa, showed that, unlike the [Co(4N)(2O)]X2 derivatives, the complexes containing 2N = bipy or phen ligands have better anticancer activity than cisplatin or carboplatin.
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Affiliation(s)
- Sándor Nagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Emese Tóth
- Department of Medical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - István Kacsir
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Attila Makai
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Attila Csaba Bényei
- Department of Physical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary.
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13
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Bogdándi V, Ditrói T, Bátai IZ, Sándor Z, Minnion M, Vasas A, Galambos K, Buglyó P, Pintér E, Feelisch M, Nagy P. Nitrosopersulfide (SSNO -) Is a Unique Cysteine Polysulfidating Agent with Reduction-Resistant Bioactivity. Antioxid Redox Signal 2020; 33:1277-1294. [PMID: 32316739 DOI: 10.1089/ars.2020.8049] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Aims: The aim of the present study was to investigate the biochemical properties of nitrosopersulfide (SSNO-), a key intermediate of the nitric oxide (NO)/sulfide cross talk. Results: We obtained corroborating evidence that SSNO- is indeed a major product of the reaction of S-nitrosothiols with hydrogen sulfide (H2S). It was found to be relatively stable (t1/2 ∼1 h at room temperature) in aqueous solution of physiological pH, stabilized by the presence of excess sulfide and resistant toward reduction by other thiols. Furthermore, we here show that SSNO- escapes the reducing power of the NADPH-driven biological reducing machineries, the thioredoxin and glutathione reductase systems. The slow decomposition of SSNO- produces inorganic polysulfide species, which effectively induce per/polysulfidation on glutathione or protein cysteine (Cys) residues. Our data also demonstrate that, in contrast to the transient activation by inorganic polysulfides, SSNO- induces long-term potentiation of TRPA1 (transient receptor potential ankyrin 1) channels, which may be due to its propensity to generate a slow flux of polysulfide in situ. Innovation: The characterized properties of SSNO- would seem to represent unique features in cell signaling by enabling sulfur and nitrogen trafficking within the reducing environment of the cytosol, with targeted release of both NO and polysulfide equivalents. Conclusion: SSNO- is a surprisingly stable bioactive product of the chemical interaction of S-nitrosothiol species and H2S that is resistant to reduction by the thioredoxin and glutathione systems. As well as generating NO, it releases inorganic polysulfides, enabling transfer of sulfane sulfur species to peptide/protein Cys residues. The sustained activation of TRPA1 channels by SSNO- is most likely linked to all these properties.
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Affiliation(s)
- Virág Bogdándi
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Budapest, Hungary
| | - Tamás Ditrói
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Budapest, Hungary
| | - István Zoárd Bátai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Zoltán Sándor
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Magdalena Minnion
- Clinical and Experimental Sciences, Faculty of Medicine, University Hospital Southampton NHS Foundation Trust, University of Southampton, Southampton, United Kingdom
| | - Anita Vasas
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Budapest, Hungary.,Department of Inorganic and Analytical Chemistry, University of Debrecen, Debrecen, Hungary
| | - Klaudia Galambos
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Budapest, Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Debrecen, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Martin Feelisch
- Clinical and Experimental Sciences, Faculty of Medicine, University Hospital Southampton NHS Foundation Trust, University of Southampton, Southampton, United Kingdom
| | - Péter Nagy
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Budapest, Hungary
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14
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Nagy I, Ferenczik G, Bíró L, Farkas E, Cs. Bényei A, Buglyó P. Metal complexation of deferasirox derivatives: A solid state and equilibrium study. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Kozsup M, Keogan DM, Fitzgerald-Hughes D, Enyedy ÉA, Twamley B, Buglyó P, Griffith DM. Synthesis and characterisation of Co(iii) complexes of N-formyl hydroxylamines and antibacterial activity of a Co(iii) peptide deformylase inhibitor complex. Dalton Trans 2020; 49:6980-6988. [PMID: 32347254 DOI: 10.1039/d0dt01123a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The X-ray crystal structure and pKa values of GSK322, a well-known and effective peptide deformylase inhibitor and antibacterial drug candidate, are reported. The first examples of Co(iii) complexes of N-formyl hydroxylamines are reported. Reaction of N-hydroxy-N-phenylformamide (HFA) with [Co(tren)Cl2]Cl and [Co(tpa)Cl2]Cl (where tren = tris(2-aminoethyl)amine, tpa = tris(2-pyridylmethyl)amine) with one equivalent of NaOH in H2O afforded [Co(tren)(HFA-1H)](PF6)1.5Cl0.5 (1) and [Co(tpa)(HFA-1H)]Cl2 (2), respectively. X-ray crystal structures of both complexes revealed that the N-formyl hydroxylamine group acts as a bidentate ligand, coordinating the Co(iii) centres via the carbonyl oxygen and deprotonated hydroxy group (O,O'), a coordination mode typically observed for closely related mono-deprotonated hydroxamic acids. Reaction of the N-formyl hydroxylamine-based GSK322 with [Co(tpa)Cl2]Cl afforded the corresponding Co(iii) chaperone complex of the peptide deformylase inhibitor, [Co(tpa)(GSK322-1H)](PF6)2. GSK322 and [Co(tpa)(GSK322-1H)](PF6)2 exhibited better Gram-positive activity than Gram-negative, where low MICs (1.56-6.25 μM) were determined for S. aureus strains, independent of their antibiotic susceptibility.
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Affiliation(s)
- Máté Kozsup
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Donal M Keogan
- Department of Chemistry, Royal College of Surgeons in Ireland, 123 St. Stephens Green, Dublin 2, Ireland.
| | - Deirdre Fitzgerald-Hughes
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland, RCSI Education & Research Centre, Beaumont Hospital, Beaumont, Dublin 9, Ireland
| | - Éva A Enyedy
- Department of Inorganic and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary and MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Brendan Twamley
- School of Chemistry, Trinity College Dublin, University of Dublin, Dublin 2, Ireland
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary
| | - Darren M Griffith
- Department of Chemistry, Royal College of Surgeons in Ireland, 123 St. Stephens Green, Dublin 2, Ireland. and SSPC, Synthesis and Solid State Pharmaceutical Centre, Ireland
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16
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Nagy I, Farkas E, Kasparkova J, Kostrhunova H, Brabec V, Buglyó P. Synthesis and characterization of (Ru(II), Co(III)) heterobimetallic complexes formed with a 1,10-phenanthroline based hydroxamic acid conjugate. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121265] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Ryan AL, Fitzgerald MC, Ozsváth A, Twamley B, Buglyó P, Murphy BM, Griffith DM. Ni(II), Pd(II), and Pt(II) Complexes of the Hedgehog Pathway Inhibitor GANT61-D. Inorg Chem 2019; 58:16075-16086. [PMID: 31729870 DOI: 10.1021/acs.inorgchem.9b02632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
GANT61-D is an important hedgehog pathway inhibitor and an interesting ligand candidate for metal coordination. The first examples of metal complexes of the potent hedgehog pathway inhibitor GANT61-D are described. The reaction of Ni(II), Pd(II), and Pt(II) precursors with the hedgehog pathway inhibitor GANT61-D gave [NiII(GANT61-D)(OH2)3(μ2-SO4)(μ3-SO4)] (1), [PdII(Cl)(GANT61-D)]Cl (2), [PtII(Cl)(GANT61-D)]Cl, and [PtII(CBDCA-2H)(GANT61-D)]. X-ray crystal structure analysis revealed that GANT61-D is a versatile N-donor ligand that can act as a bidentate ligand via the diaminopropane (DAP) N atoms or a tridentate ligand via the DAP N atoms and one dimethylaniline N atom. Protonation constants of the GANT61-D ligand in water and in a 60:40 (w/w) dimethyl sulfoxide-water solvent mixture were determined. Potentiometric and spectroscopic data on the NiII(GANT61-D) system indicate the formation of octahedral 1:1 species with medium stability in solution. 1 and 2 exhibited noteworthy in vitro cytotoxicity against medulloblastoma cancer cells.
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Affiliation(s)
- Aisling L Ryan
- Department of Chemistry , Royal College of Surgeons in Ireland , 123 St. Stephen's Green , Dublin D02 YN77 , Ireland
| | - Marie-Claire Fitzgerald
- Department of Physiology and Medical Physics , Royal College of Surgeons in Ireland , 31A York Street , Dublin D02 YN77 , Ireland.,National Children's Research Centre at the Children's Health Ireland at Crumlin , Dublin D12 N512 , Ireland
| | - András Ozsváth
- Department of Inorganic and Analytical Chemistry , University of Debrecen , Egyetem tér 1 , Debrecen H-4032 , Hungary
| | - Brendan Twamley
- School of Chemistry, Trinity College Dublin , University of Dublin , Dublin D02 PN40 , Ireland
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry , University of Debrecen , Egyetem tér 1 , Debrecen H-4032 , Hungary
| | - Brona M Murphy
- Department of Physiology and Medical Physics , Royal College of Surgeons in Ireland , 31A York Street , Dublin D02 YN77 , Ireland.,National Children's Research Centre at the Children's Health Ireland at Crumlin , Dublin D12 N512 , Ireland
| | - Darren M Griffith
- Department of Chemistry , Royal College of Surgeons in Ireland , 123 St. Stephen's Green , Dublin D02 YN77 , Ireland
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18
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Kozsup M, Farkas E, Bényei AC, Kasparkova J, Crlikova H, Brabec V, Buglyó P. Synthesis, characterization and biological evaluation of Co(III) complexes with quinolone drugs. J Inorg Biochem 2019; 193:94-105. [DOI: 10.1016/j.jinorgbio.2019.01.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 11/27/2022]
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19
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Abstract
The interaction between di- and tripeptide hydroxamic acids and Pd(ii) (as a Pt(ii) model but with faster ligand exchange reactions) was studied in aqueous solution in the presence of chloride ions by pH-potentiometric and NMR methods revealing ligand-dependent competition between the coordinative and hydrolytic processes.
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Affiliation(s)
- András Ozsváth
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4032 Debrecen, Egyetem tér 1
- Hungary
| | - Etelka Farkas
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4032 Debrecen, Egyetem tér 1
- Hungary
| | - Róbert Diószegi
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4032 Debrecen, Egyetem tér 1
- Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4032 Debrecen, Egyetem tér 1
- Hungary
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20
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Balogh BD, Bihari Z, Buglyó P, Csire G, Kerekes Z, Lukács M, Sóvágó I, Várnagy K. Metal binding selectivity of an N-terminally free multihistidine peptide HAVAHHH-NH2. NEW J CHEM 2019. [DOI: 10.1039/c8nj04538k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For NH2-HAVAHHH-NH2 peptide the coordination to internal histidines is preferred for copper(ii), while it is the opposite for nickel(ii).
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Affiliation(s)
- Bettina Diána Balogh
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
| | - Zsolt Bihari
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
| | - Gizella Csire
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
| | - Zsuzsanna Kerekes
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
| | - Márton Lukács
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
| | - Imre Sóvágó
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Debrecen
- Hungary
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21
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Sanna D, Palomba J, Lubinu G, Buglyó P, Nagy S, Perdih F, Garribba E. Role of Ligands in the Uptake and Reduction of V(V) Complexes in Red Blood Cells. J Med Chem 2018; 62:654-664. [PMID: 30576137 DOI: 10.1021/acs.jmedchem.8b01330] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The interaction with erythrocytes of four [VVO2L2]- complexes, with L = picolinate (pic), 5-cyanopicolinate (picCN), 3-aminopyrazine-2-carboxylate (przNH2), and 1,2-dimethyl-3-hydroxy-4(1 H)-pyridinonate (dhp), was studied. The thermodynamic stability at physiological pH is: [VVO2(dhp)2]- > [VVO2(przNH2)2]- > [VVO2(pic)2]- > [VVO2(picCN)2]-. With picCN and pic, V exists at physiological pH as H2VVO4-, with przNH2 as a mixture of H2VVO4- and [VVO2(przNH2)2]- and with dhp as [VVO2(dhp)2]-. In the systems with pic and picCN, H2VVO4- and the ligands cross the erythrocyte membrane independently, with dhp the uptake occurs by diffusion, whereas with przNH2 both the mechanisms are active. Inside erythrocytes stable VIVOL2 complexes are formed, indicating that there is no relationship with the stability and redox state of the administered compounds and that, if the metal ion changes its oxidation state in the cytosol as V does, unstable complexes in the extracellular medium could become stable inside the cells and contribute to the pharmacological action.
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Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare , Trav. La Crucca 3, I-07040 Sassari , Italy
| | - Jessica Palomba
- Dipartimento di Chimica e Farmacia , Università di Sassari , Via Vienna 2 , I-07100 Sassari , Italy
| | - Giuseppe Lubinu
- Dipartimento di Chimica e Farmacia , Università di Sassari , Via Vienna 2 , I-07100 Sassari , Italy
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Sándor Nagy
- Department of Inorganic and Analytical Chemistry , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Franc Perdih
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia , Università di Sassari , Via Vienna 2 , I-07100 Sassari , Italy
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Sanna D, Ugone V, Sciortino G, Buglyó P, Bihari Z, Parajdi-Losonczi PL, Garribba E. V IVO complexes with antibacterial quinolone ligands and their interaction with serum proteins. Dalton Trans 2018; 47:2164-2182. [PMID: 29327005 DOI: 10.1039/c7dt04216g] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quinolone derivatives are among the most commonly prescribed antibacterials in the world and could also attract interest as organic ligands in the design of metal complexes with potential pharmacological activity. In this study, five compounds, belonging to the first (nalidixic acid or Hnal), second (ciprofloxacin or Hcip, and norfloxacin or Hnor) and third generation (levofloxacin or Hlev, and sparfloxacin or Hspar) of quinolones, were used as ligands to bind the VIVO2+ ion. In aqueous solution, mono- and bis-chelated species were formed as a function of pH, with cis-[VOHxL2(H2O)]x+ and [VOHxL2]x+, x = 0-2, being the major complexes at pH 7.4. DFT calculations indicate that the most stable isomers are the octahedral OC-6-32 and the square pyramidal SPY-5-12, in equilibrium with each other. To the best of our knowledge, this is the first case that an equilibrium between a penta-coordinated square pyramidal complex and a hexa-coordinated octahedral complex is observed in solution for ligands forming six-membered chelated rings. Nalidixic acid forms the solid compound [VO(nal)2(H2O)], to which a cis-octahedral geometry was assigned. The interaction with 1-methylimidazole (MeIm) causes a shift of the equilibrium SPY-5 + H2O ⇄ OC-6 toward the right after the formation of cis-[VOHxL2(MeIm)]x+, where MeIm replaces an equatorial water ligand. The study of the systems containing [VO(nal)2(H2O)] and the serum proteins - albumin (HSA), apo-transferrin (apo-hTf) and holo-transferrin (holo-hTf) - indicates that HSA and holo-hTf form the mixed species {VO(nal)2}y(HSA) and {VO(nal)2}y(holo-hTf), where y = 1-3 denotes the number of VO(nal)2 moieties bound to accessible histidines (His105, His367, His510 for HSA, and His25, His349, His606 for holo-hTf), whereas apo-hTf yields VO(nal)2(apo-hTf) with the coordination of the His289 residue only. Docking calculations suggest that the specific conformation of apo-hTf and the steric hindrance of the cis-VO(nal)2 moiety interfere with its interaction with all the surface His residues and the formation of a hydrogen bond network which could stabilize the binding sites.
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Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy.
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Abstract
The first report on the anti-cancer activity of the compound Metvan, [VIVO(Me2phen)2(SO4)], where Me2phen is 4,7-dimethyl-1,10-phenanthroline, dates back to 2001. Although it was immediately identified as one of the most promising multitargeted anti-cancer V compounds, no development on the medical experimentation was carried out. One of the possible reasons is the lack of information on its speciation in aqueous solution and its thermodynamic stability, factors which influence the transport in the blood and the final form which reaches the target organs. To fill this gap, in this work the speciation of Metvan in aqueous solution and human blood was studied by instrumental (EPR, electronic absorption spectroscopy, ESI-MS and ESI-MS/MS), analytical (pH-potentiometry) and computational (DFT) methods. The results suggested that Metvan transforms at physiological pH into the hydrolytic species cis-[VO(Me2phen)2(OH)]+ and that both citrate and proteins (transferrin and albumin in the blood serum, and hemoglobin in the erythrocytes) form mixed complexes, denoted [VO(Me2phen)(citrH-1)]2- and VO-Me2phen-Protein with the probable binding of His-N donors. The measurements with erythrocytes suggest that Metvan is able to cross their membrane forming mixed species VO-Me2phen-Hb. The redox stability in cell culture medium was also examined, showing that ca. 60% is oxidized to VV after 5 h. Overall, the speciation of Metvan in the blood mainly depends on the V concentration: when it is larger than 50 μM, [VO(Me2phen)(citrH-1)]2- and VO-Me2phen-Protein are the major species, while for concentrations lower than 10 μM, (VO)(hTf) is formed and Me2phen is lost. Therefore, it is plausible that the pharmacological activity of Metvan could be due to the synergic action of free Me2phen, and VIVO and VVO/VVO2 species.
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Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
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Sanna D, Ugone V, Buglyó P, Nagy S, Kacsir I, Garribba E. Speciation in aqueous solution and interaction with low and high molecular mass blood bioligands of [V IV O(oda)(H 2 O) 2 ], a V compound with in vitro anticancer activity. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.07.064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Buglyó P, Kacsir I, Kozsup M, Nagy I, Nagy S, Bényei AC, Kováts É, Farkas E. Tuning the redox potentials of ternary cobalt(III) complexes containing various hydroxamates. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.07.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Parajdi-Losonczi PL, Buglyó P, Skakalova H, Kasparkova J, Lihi N, Farkas E. Half-sandwich type rhodium(iii)–aminohydroxamate complexes: the role of the position of the amino group in metal ion binding. NEW J CHEM 2018. [DOI: 10.1039/c7nj04711h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Relative order of the pH-dependent conditional stability of the hydroxamate type (O,O) and (Namino,Nhydroxamato) chelates determines the coordination modes in the various mono- and dinuclear complexes of [(η5-Cp*)RhIII(H2O)3]2+ with α-, β- and γ-aminohydroxamic acids.
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Affiliation(s)
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Hana Skakalova
- Department of Biophysics
- Faculty of Science
- Palacky University
- 77146 Olomouc
- Czech Republic
| | - Jana Kasparkova
- Department of Biophysics
- Faculty of Science
- Palacky University
- 77146 Olomouc
- Czech Republic
| | - Norbert Lihi
- MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group
- University of Debrecen
- H-4032 Debrecen
- Hungary
| | - Etelka Farkas
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4032 Debrecen
- Hungary
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Sanna D, Serra M, Ugone V, Manca L, Pirastru M, Buglyó P, Bíró L, Micera G, Garribba E. Biorelevant reactions of the potential anti-tumor agent vanadocene dichloride. Metallomics 2017; 8:532-41. [PMID: 27121101 DOI: 10.1039/c6mt00002a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The interaction of the potential anti-tumor agent vanadocene dichloride ([Cp2VCl2] or VDC) with some relevant bioligands of the cytosol such as proteins (Hb), amino acids (glycine and histidine), NADH derivatives (NADH, NADPH, NAD(+) and NADP(+)), reductants (GSH and ascorbic acid), phosphates (HPO4(2-), P2O7(4-), cAMP, AMP, ADP and ATP) and carboxylate derivatives (lactate) and its uptake by red blood cells were studied. The results indicated that [Cp2VCl2] transforms at physiological pH into [Cp2V(OH)2] and that only HPO4(2-), P2O7(4-), lactate, ATP and ADP form mixed species with the [Cp2V](2+) moiety replacing the two hydroxide ions. EPR and electronic absorption spectroscopy, agarose gel electrophoresis and spin trapping measurements allow excluding any direct interaction and/or intercalation with DNA and the formation of reactive oxygen species (ROS) in Fenton-like reactions. Uptake experiments by erythrocytes suggested that VDC crosses the membrane and enters inside the cells, whereas 'bare' V(IV) transforms into V(IV)O species with loss of the two cyclopentadienyl rings. This transformation in the cellular environment could be related to the mechanism of action of VDC.
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Affiliation(s)
- Daniele Sanna
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, UOS di Sassari, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Maria Serra
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, UOS di Sassari, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Valeria Ugone
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.
| | - Laura Manca
- Dipartimento di Scienze Biomediche, Università di Sassari, Via Muroni 25, I-07100 Sassari, Italy
| | - Monica Pirastru
- Dipartimento di Scienze Biomediche, Università di Sassari, Via Muroni 25, I-07100 Sassari, Italy
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, H-4010 Debrecen, Hungary
| | - Linda Bíró
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, H-4010 Debrecen, Hungary
| | - Giovanni Micera
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.
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Buglyó P, Parajdi-Losonczi PL, Bényei AC, Lihi N, Bíró L, Farkas E. Versatility of Coordination Modes in Complexes of Monohydroxamic Acids with Half-Sandwich Type Ruthenium, Rhodium, Osmium and Iridium Cations. ChemistrySelect 2017. [DOI: 10.1002/slct.201701858] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Péter Buglyó
- Department of Inorganic and Analytical Chemistry; University of Debrecen; H-4032 Debrecen, Egyetem tér 1 Hungary
| | - Péter L. Parajdi-Losonczi
- Department of Inorganic and Analytical Chemistry; University of Debrecen; H-4032 Debrecen, Egyetem tér 1 Hungary
| | - Attila C. Bényei
- Department of Physical Chemistry; University of Debrecen; H-4032 Debrecen, Egyetem tér 1 Hungary
| | - Norbert Lihi
- MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group; University of Debrecen; H-4032 Debrecen, Egyetem tér 1 Hungary
| | - Linda Bíró
- Department of Inorganic and Analytical Chemistry; University of Debrecen; H-4032 Debrecen, Egyetem tér 1 Hungary
| | - Etelka Farkas
- Department of Inorganic and Analytical Chemistry; University of Debrecen; H-4032 Debrecen, Egyetem tér 1 Hungary
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Farkas E, Buglyó P. Lead(II) Complexes of Amino Acids, Peptides, and Other Related Ligands of Biological Interest. Met Ions Life Sci 2017; 17:/books/9783110434330/9783110434330-008/9783110434330-008.xml. [PMID: 28731301 DOI: 10.1515/9783110434330-008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Lead(II) forms (NH2,COO-)-chelated mono- and bis-complexes with simple amino acids, while mono-complexes with pH-dependent coordination modes exist with simple dipeptides. These mostly hemidirected complexes have moderate stability. While a weak interaction of side chain imidazole and carboxylate in lead(II)-aminoacidato complexes is found, the thiolate group has an exceptionally high affinity to this metal ion. For example, tridentate (NH2,COO-,S-)-coordination of penicillamine (Pen) and cysteine (Cys) results in an extremely strong interaction with lead(II), but, owing to the sterical effect of the 6s2 pair, a second ligand is not able to coordinate in the above mentioned tridentate way. Although there is no example for a lead(II)-induced deprotonation and coordination of a peptide-amide and the side-chain thiolate in oligopeptides has a somewhat lower basicity compared to that of Pen or Cys, still the Cys-containing peptides interact rather strongly with lead(II). Interestingly, the position of Cys in the peptide influences significantly both the lead-binding ability via different bonding modes and the selectivity for lead(II) against other metal ions, like zinc(II) or cadmium(II). At high ligand excess, however, coordination of three sulfur donors to lead(II) is found with thiolate-containing amino acids and oligopeptides. High basicity oxygens of hydroxamates, hydroxypyronates, and hydroxypyridinonates are also effective lead-binding donors. Some factors affecting the complexation of these ligands with lead(II) are: (i) A larger extent of delocalization along the ring in hydroxypyridinonate results in a more favored metal-binding ability over hydroxypyronate. (ii) Even monohydroxamates are good ligands and form mono- and bis-complexes with lead(II). (iii) In general, dihydroxamates and trihydroxamate-based siderophores, like desferrioxamine B (DFB) and desferricoprogen (DFC), are better binding agents for Pb(II) than the monohydroxamates, but the length and structure of linkers connecting the hydroxamate moieties have a significant impact on the complexation and selectivity for lead(II). (iv) The corresponding thio derivatives are significantly better ligands for lead than their parent oxo molecules, but polymeric complexes with poor water solubility are formed in most cases. (v) Out of the hydroxamate derivatives of amino acids the α-ones are the most effective ligands, provided polynuclear species involving the hydroxamate-oxygens, amino-N and hydroxamate-N can be formed.
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Bihari Z, Vultos F, Fernandes C, Gano L, Santos I, Correia JDG, Buglyó P. Synthesis, characterization and biological evaluation of a (67)Ga-labeled (η(6)-Tyr)Ru(η(5)-Cp) peptide complex with the HAV motif. J Inorg Biochem 2016; 160:189-97. [PMID: 26907798 DOI: 10.1016/j.jinorgbio.2016.02.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/21/2016] [Accepted: 02/10/2016] [Indexed: 12/28/2022]
Abstract
Heterobimetallic complexes with the evolutionary, well-preserved, histidyl-alanyl-valinyl (HAV) sequence for cadherin targeting, an organometallic Ru core with anticancer activity and a radioactive moiety for imaging may hold potential as theranostic agents for cancer. Visible-light irradiation of the HAVAY-NH2 pentapeptide in the presence of [(η(5)-Cp)Ru(η(6)-naphthalene)](+) resulted in the formation of a full sandwich type complex, (η(6)-Tyr-RuCp)-HAVAY-NH2 in aqueous solution, where the metal ion is connected to the Tyr (Y) unit of the peptide. Conjugation of this complex to 2,2'-(7-(1-carboxy-4-((4-isothiocyanatobenzyl)amino)-4-oxobutyl)-1,4,7-triazonane-1,4-diyl)diacetic acid (NODA-GA) and subsequent metalation of the resulting product with stable ((nat)Ga) and radioactive ((67)Ga) isotope yielded (nat)Ga/(67)Ga-NODA-GA-[(η(6)-Tyr-RuCp)-HAVAY-NH2]. The non-radioactive compounds were characterized by NMR spectroscopy and Mass Spectrometry. The cellular uptake and cytotoxicity of the radioactive and non-radioactive complexes, respectively, were evaluated in various human cancer cell lines characterized by different levels of N- or E-cadherins expression. Results from these studies indicate moderate cellular uptake of the radioactive complexes. However, the inhibition of the cell proliferation was not relevant.
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Affiliation(s)
- Zsolt Bihari
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, P.O.Box 21, Hungary
| | - Filipe Vultos
- Centro de Ciências e Tecnologias Nucleares (C(2)TN), Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Célia Fernandes
- Centro de Ciências e Tecnologias Nucleares (C(2)TN), Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Lurdes Gano
- Centro de Ciências e Tecnologias Nucleares (C(2)TN), Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Isabel Santos
- Centro de Ciências e Tecnologias Nucleares (C(2)TN), Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - João D G Correia
- Centro de Ciências e Tecnologias Nucleares (C(2)TN), Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, P.O.Box 21, Hungary.
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Buglyó P, Bíró L, Nagy I, Szőcs B, Farkas E. Hydroxypyronate, thiohydroxypyronate and hydroxypyridinonate derivatives as potential Pb2+ sequestering agents. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bihari Z, Nagy Z, Buglyó P. [(η6-p-cym)Ru(H2O)3]2+ binding capability of N-methylimidazole to model the interaction between the metal ion and surface histidine residues of peptides. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.12.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Patalenszki J, Bíró L, Bényei AC, Muchova TR, Kasparkova J, Buglyó P. Half-sandwich complexes of ruthenium, osmium, rhodium and iridium with dl-methionine or S-methyl-l-cysteine: a solid state and solution equilibrium study. RSC Adv 2015. [DOI: 10.1039/c4ra15649h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Half-sandwich type platinum metal ions form stable 1 : 1 complexes with dl-methionine and S-methyl-l-cysteine resulting in diastereomers that epimerize at the S donor.
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Affiliation(s)
- János Patalenszki
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4010 Debrecen
- Hungary
| | - Linda Bíró
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4010 Debrecen
- Hungary
| | - Attila Csaba Bényei
- Department of Physical Chemistry
- University of Debrecen
- H-4010 Debrecen
- Hungary
| | | | - Jana Kasparkova
- Department of Biophysics
- Faculty of Science
- Palacky University
- 77146 Olomouc
- Czech Republic
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- H-4010 Debrecen
- Hungary
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Sanna D, Fabbri D, Serra M, Buglyó P, Bíró L, Ugone V, Micera G, Garribba E. Characterization and biotransformation in the plasma and red blood cells of V(IV)O(2+) complexes formed by ceftriaxone. J Inorg Biochem 2014; 147:71-84. [PMID: 25601642 DOI: 10.1016/j.jinorgbio.2014.12.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 12/19/2014] [Accepted: 12/19/2014] [Indexed: 11/29/2022]
Abstract
The coordination mode and geometry in aqueous solution of oxidovanadium(IV) complexes formed by a third-generation cephalosporin, ceftriaxone (H3cef), were studied by spectroscopic (EPR, electron paramagnetic resonance), pH-potentiometric and computational (DFT, density functional theory) methods. The behavior of the model systems containing 6-hydroxy-2-methyl-3-thioxo-3,4-dihydro-1,2,4-triazine-5(2H)-one (H2hmtdt) and 3-benzylthio-6-hydroxy-2-methyl-1,2,4-triazine-5(2H)-one (Hbhmt) was examined for comparison. The stability of the tautomers of ceftriaxone and 6-hydroxy-2-methyl-3-thioxo-3,4-dihydro-1,2,4-triazine-5(2H)-one in the neutral, mono- and bi-anionic form was calculated by DFT methods, both in the gas phase and in aqueous solution, and the electron density on the oxygen atoms of the hydroxytriazinone ring was related to the pKa of the ligands. The data demonstrate that ceftriaxone coordinates V(IV)O(2+) forming mono- and bis-chelated complexes with (Oket, O(-)) donor set and formation of five-membered chelate rings. The geometry of the bis-chelated complex, cis-[VO(Hcef)2(H2O)](2-), is cis-octahedral and this species can deprotonate, around physiological pH, to form the corresponding mono-hydroxido cis-[VO(Hcef)2(OH)](3-). The interaction of cis-[VO(Hcef)2(H2O)](2-) with apo-transferrin (apo-hTf) was studied and the results suggest that V(IV)O(2+) distributes between (VO)apo-hTf/(VO)2apo-hTf and cis-[VO(Hcef)2(H2O)](2-), whereas mixed complexes are not formed for charge and steric effects. The interaction of cis-[VO(Hcef)2(H2O)](2-) with red blood cells shows that ceftriaxone helps V(IV)O(2+) ion to cross the erythrocyte membrane. Inside the cell cis-[VO(Hcef)2(H2O)](2-) decomposes and the same species formed by inorganic V(IV)O(2+) are observed. The relationship between the biotransformation in the plasma and red blood cells and the potential pharmacological activity of V(IV)O(2+) species of ceftriaxone is finally discussed.
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Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Davide Fabbri
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Maria Serra
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Péter Buglyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, H-4010 Debrecen, Hungary
| | - Linda Bíró
- Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, H-4010 Debrecen, Hungary
| | - Valeria Ugone
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Giovanni Micera
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy; Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy; Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy.
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Hüse D, Bíró L, Patalenszki J, Bényei AC, Buglyó P. Complex Formation between [(η6-p-cymene)Ru(H2O)3]2+and Hydroxycarboxylates or their Sulfur Analogues - The Role of Thiolate Groups in Metal Ion Binding. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402559] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bíró L, Balogh E, Buglyó P. Interaction between [Ru(η6-p-cym)(H2O)3]2+ and dl-serine or dl-isoserine: The role of the side chain alcoholic OH group in metal ion binding. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2012.11.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bíró L, Godó AJ, Bihari Z, Garribba E, Buglyó P. Tuning the Hydrolytic Properties of Half-Sandwich-Type Organometallic Cations in Aqueous Solution. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201527] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bíró L, Hüse D, Bényei AC, Buglyó P. Interaction of [Ru(η6-p-cym)(H2O)3]2+ with citrate and tricarballate ions in aqueous solution; X-ray crystal structure of novel half-sandwich Ru(II)-citrato complexes. J Inorg Biochem 2012; 116:116-25. [DOI: 10.1016/j.jinorgbio.2012.07.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 07/23/2012] [Accepted: 07/31/2012] [Indexed: 10/28/2022]
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Sanna D, Buglyó P, Bíró L, Micera G, Garribba E. Coordinating Properties of Pyrone and Pyridinone Derivatives, Tropolone and Catechol toward the VO2+ Ion: An Experimental and Computational Approach. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101249] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Sanna D, Buglyó P, Tomaz AI, Pessoa JC, Borović S, Micera G, Garribba E. VIVO and CuII complexation by ligands based on pyridine nitrogen donors. Dalton Trans 2012; 41:12824-38. [DOI: 10.1039/c2dt31109g] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Godó AJ, Bényei AC, Duff B, Egan DA, Buglyó P. Synthesis and X-ray diffraction structures of novel half-sandwich Os(ii)-and Ru(ii)-hydroxamate complexes. RSC Adv 2012. [DOI: 10.1039/c1ra00998b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Bíró L, Farkas E, Buglyó P. Hydrolytic behaviour and chloride ion binding capability of [Ru(η6-p-cym)(H2O)3]2+: a solution equilibrium study. Dalton Trans 2011; 41:285-91. [PMID: 22051630 DOI: 10.1039/c1dt11405k] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrolysis of an organometallic cation, [Ru(η(6)-p-cym)(H(2)O)(3)](2+) (p-cym = 1-isopropyl-4-methylbenzene), in the presence of 0.20 M KNO(3) or KCl as supporting electrolyte was studied in detail with the combined use of pH-potentiometry, (1)H-NMR, UV-VIS and ESI-TOF-MS. Stoichiometry and stability constants of chlorido, hydroxido and mixed chlorido-hydroxido complexes formed in aqueous solution have been determined. At pH < 4.0 where hydrolysis of [Ru(η(6)-p-cym)(H(2)O)(3)](2+) is negligible with increasing chloride ion concentration two chlorido complexes, [Ru(η(6)-p-cym)(H(2)O)(2)Cl](+) and [{Ru(η(6)-p-cym)}(2)(μ(2)-Cl)(3)](+), are detectable. At pH > 5.0, in chloride ion free samples the exclusive formation of [{Ru(η(6)-p-cym)}(2)(μ(2)-OH)(3)](+) is found. However, if chloride ion is present (in the range 0-3.50 M) novel mixed chlorido-hydroxido species, [{Ru(η(6)-p-cym)}(2)(μ(2)-OH)(2)(μ(2)-Cl)](+) and [{Ru(η(6)-p-cym)}(2)(μ(2)-OH)(μ(2)-Cl)(2)](+) can also be identified at pH > 4.0. The results obtained in this study may help in rationalizing the solution behaviour of half-sandwich [Ru(η(6)-p-cym)(XY)Z] type complexes which, after dissociation of both the monodentate Z and the chelating XY, are capable of yielding the free aqua species [Ru(η(6)-p-cym)(H(2)O)(3)](2+). Our results demonstrate that different chloride ion concentrations can influence the speciation in the acidic pH range but at biologically relevant conditions (pH = 7.4, c(Cl(-)) = 0.16 M) and at c(M) = 1 μM [{Ru(η(6)-p-cym)}(2)(μ(2)-OH)(3)](+) is predominant in the absence of any coordinating ligands.
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Affiliation(s)
- Linda Bíró
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010, Debrecen, Hungary
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Griffith DM, Szőcs B, Keogh T, Suponitsky KY, Farkas E, Buglyó P, Marmion CJ. Suberoylanilide hydroxamic acid, a potent histone deacetylase inhibitor; its X-ray crystal structure and solid state and solution studies of its Zn(II), Ni(II), Cu(II) and Fe(III) complexes. J Inorg Biochem 2011; 105:763-9. [DOI: 10.1016/j.jinorgbio.2011.03.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 03/09/2011] [Accepted: 03/10/2011] [Indexed: 01/24/2023]
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Bíró L, Farkas E, Buglyó P. Complex formation between Ru(η(6)-p-cym)(H2O)3]2+ and (O,O) donor ligands with biological relevance in aqueous solution. Dalton Trans 2010; 39:10272-8. [PMID: 20922244 DOI: 10.1039/c0dt00469c] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction between [Ru(η(6)-p-cym)(H(2)O)(3)](2+) and (O,O) type chelators with different basicity of the donor atoms was studied using combined pH-potentiometric, (1)H-NMR and ESI-TOF-MS techniques. The studied nine ligands are building blocks of reported complexes with antitumor activity or may model (O,O) donor serum components capable of interacting with the administered half-sandwich ruthenium(II) type drug. Composition and stability constants of the [Ru(η(6)-p-cym)(O,O)Y] type species (Y: H(2)O or OH(-)) were determined (T = 25.0 °C; I = 0.20 M (KCl)) and the metal ion binding strengths of the ligands are discussed. It was found that ligands with two low basicity O donors (oxalic and cyclobutane-1,1-dicarboxylic acid) bind the metal ion at acidic conditions but are not able to prevent the hydrolysis at physiologically relevant conditions. Ligands with one low and one high basicity O donor (lactic and salicylic acid) are weak binders for Ru(η(6)-p-cym)(H(2)O)(3)](2+). Pyrone or pyridinone based ligands are capable of binding the metal ion over a wide pH range and no hydrolysis product is detectable at pH = 7.4. The obtained speciation models may help in the rationalization of the biological activity of such complexes and provide a deeper insight into the solution behaviour of half-sandwich Ru(II) complexes with potential anticancer activity.
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Affiliation(s)
- Linda Bíró
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010, Debrecen, Hungary
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Csapó E, Buglyó P, Nagy NV, Santos MA, Corona A, Farkas E. Syntheses and characterization of Cu2+, Ni2+ and Zn2+ binding capability of histidinehydroxamic acid derivatives. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.08.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bényei AC, Paragh G, Balázs N, Godó A, Nagy ZT, Buglyó P. Supramolecular architecture of novel hydroxamato complexes of Os(II) and Ru(II). Acta Crystallogr A 2010. [DOI: 10.1107/s0108767310094079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sanna D, Buglyó P, Micera G, Garribba E. A quantitative study of the biotransformation of insulin-enhancing VO2+ compounds. J Biol Inorg Chem 2010; 15:825-39. [DOI: 10.1007/s00775-010-0647-9] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Accepted: 03/02/2010] [Indexed: 11/24/2022]
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Buglyó P, Farkas E. Novel half-sandwich Ru(II)-hydroxamate complexes: synthesis, characterization and equilibrium study in aqueous solution. Dalton Trans 2009:8063-70. [DOI: 10.1039/b908173a] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kozlov YN, Romakh VB, Kitaygorodskiy A, Buglyó P, Süss-Fink G, Shul'pin GB. Oxidation of 2-propanol and cyclohexane by the reagent "hydrogen peroxide-vanadate anion-pyrazine-2-carboxylic acid": kinetics and mechanism. J Phys Chem A 2007; 111:7736-52. [PMID: 17655204 DOI: 10.1021/jp0700884] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The vanadate anion in the presence of pyrazine-2-carboxylic acid (PCA [identical with] pcaH) efficiently catalyzes the oxidation of 2-propanol by hydrogen peroxide to give acetone. UV-vis spectroscopic monitoring of the reaction as well as the kinetics lead to the conclusion that the crucial step of the process is the monomolecular decomposition of a diperoxovanadium(V) complex containing the pca ligand to afford the peroxyl radical, HOO(.-) and a V(IV) derivative. The rate-limiting step in the overall process may not be this (rapid) decomposition itself but (prior to this step) the slow hydrogen transfer from a coordinated H2O2 molecule to the oxygen atom of a pca ligand at the vanadium center: "(pca)(O=)V...O2H2" --> "(pca)(HO-)V-OOH". The V(IV) derivative reacts with a new hydrogen peroxide molecule to generate the hydroxyl radical ("V(IV)" + H2O2 --> "V(V)" + HO(-) + HO(.-)), active in the activation of isopropanol: HO(.-) + Me2CH(OH) --> H2O + Me2C(.-)(OH). The reaction with an alkane, RH, in acetonitrile proceeds analogously, and in this case the hydroxyl radical abstracts a hydrogen atom from the alkane: HO(.-) + RH --> H2O + R(.-). These conclusions are in a good agreement with the results obtained by Bell and co-workers (Khaliullin, R. Z.; Bell, A. T.; Head-Gordon, M. J. Phys. Chem. B 2005, 109, 17984-17992) who recently carried out a density functional theory study of the mechanism of radical generation in the reagent under discussion in acetonitrile.
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Affiliation(s)
- Yuriy N Kozlov
- Semenov Institute of Chemical Physics, Russian Academy of Sciences, Ulitsa Kosygina, dom 4, Moscow 119991, Russia
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