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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] [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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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] [Abstract] [Key Words] [Grants] [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
| | - Éva Bokor
- Department of Organic Chemistry, University of Debrecen, Debrecen, Hungary
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3
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Rivas F, Del Mármol C, Scalese G, Pérez-Díaz L, Machado I, Blacque O, Medeiros A, Comini M, Gambino D. New multifunctional Ru(II) organometallic compounds show activity against Trypanosoma brucei and Leishmania infantum. J Inorg Biochem 2022; 237:112016. [PMID: 36244312 DOI: 10.1016/j.jinorgbio.2022.112016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/24/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022]
Abstract
Human African trypanosomiasis (sleeping sickness) and leishmaniasis are prevalent zoonotic diseases caused by genomically related trypanosomatid protozoan parasites (Trypanosoma brucei and Leishmania spp). Additionally, both are co-endemic in certain regions of the world. Only a small number of old drugs exist for their treatment, with most of them sharing poor safety, efficacy, and pharmacokinetic profiles. In this work, new multifunctional Ru(II) ferrocenyl compounds were rationally designed as potential agents against these trypanosomatid parasites by including in a single molecule 1,1'-bis(diphenylphosphino)ferrocene (dppf) and two bioactive bidentate ligands: 8-hydroxyquinoline derivatives (8HQs) and polypyridyl ligands (NN). Three [Ru(8HQs)(dppf)(NN)](PF6) compounds were synthesized and fully characterized. They showed in vitro activity on bloodstream Trypanosoma brucei (IC50 140-310 nM) and on Leishmania infantum promastigotes (IC50 3.0-4.8 μM). The compounds showed good selectivity towards T. brucei in respect to J774 murine macrophages as mammalian cell model (SI 15-38). Changing hexafluorophosphate counterion by chloride led to a three-fold increase in activity on both parasites and to a two to three-fold increase in selectivity towards the pathogens. The compounds affect in vitro at least the targets of the individual bioactive moieties included in the new chemical entities: DNA and generation of ROS. The compounds are stable in solution and are more lipophilic than the free bioactive ligands. No clear correlation between lipophilicity, interaction with DNA or generation of ROS and activity was detected, which agrees with their overall similar anti-trypanosoma potency and selectivity. These compounds are promising candidates for further drug development.
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Affiliation(s)
- Feriannys Rivas
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay; Programa de Posgrado en Química, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Carolina Del Mármol
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Gonzalo Scalese
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Leticia Pérez-Díaz
- Laboratorio de Interacciones Moleculares, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Ignacio Machado
- Área Química Analítica, Universidad de la República, Montevideo, Uruguay
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Marcelo Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Dinorah Gambino
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
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Dorairaj DP, Haribabu J, Chang Y, Echeverria C, Hsu SCN, Karvembu R. Pd (II)‐PPh
3
complexes of halogen substituted acylthiourea ligands: Biomolecular interactions and
in vitro
anti‐proliferative activity. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Jebiti Haribabu
- Department of Chemistry National Institute of Technology Tiruchirappalli India
- Facultad de Medicina Universidad de Atacama Copiapo Chile
| | - Yu‐Lun Chang
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung Taiwan
| | | | - Sodio C. N. Hsu
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung Taiwan
| | - Ramasamy Karvembu
- Department of Chemistry National Institute of Technology Tiruchirappalli India
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5
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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] [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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6
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Gambino D, Otero L. Facing Diseases Caused by Trypanosomatid Parasites: Rational Design of Pd and Pt Complexes With Bioactive Ligands. Front Chem 2022; 9:816266. [PMID: 35071192 PMCID: PMC8777014 DOI: 10.3389/fchem.2021.816266] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 12/15/2021] [Indexed: 12/26/2022] Open
Abstract
Human African Trypanosomiasis (HAT), Chagas disease or American Trypanosomiasis (CD), and leishmaniases are protozoan infections produced by trypanosomatid parasites belonging to the kinetoplastid order and they constitute an urgent global health problem. In fact, there is an urgent need of more efficient and less toxic chemotherapy for these diseases. Medicinal inorganic chemistry currently offers an attractive option for the rational design of new drugs and, in particular, antiparasitic ones. In this sense, one of the main strategies for the design of metal-based antiparasitic compounds has been the coordination of an organic ligand with known or potential biological activity, to a metal centre or an organometallic core. Classical metal coordination complexes or organometallic compounds could be designed as multifunctional agents joining, in a single molecule, different chemical species that could affect different parasitic targets. This review is focused on the rational design of palladium(II) and platinum(II) compounds with bioactive ligands as prospective drugs against trypanosomatid parasites that has been conducted by our group during the last 20 years.
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Affiliation(s)
- Dinorah Gambino
- Área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Lucía Otero
- Área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
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Haribabu J, Balachandran C, Tamizh MM, Arun Y, Bhuvanesh NSP, Aoki S, Karvembu R. Unprecedented formation of palladium(II)-pyrazole based thiourea from chromone thiosemicarbazone and [PdCl 2(PPh 3) 2]: Interaction with biomolecules and apoptosis through mitochondrial signaling pathway. J Inorg Biochem 2020; 205:110988. [PMID: 31981770 DOI: 10.1016/j.jinorgbio.2019.110988] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 12/30/2019] [Accepted: 12/30/2019] [Indexed: 10/25/2022]
Abstract
Two novel pyrazole based thiourea palladium(II) complexes, [PdCl(PPh3)(C9H8NO2S-pz)] (1) and [PdCl(PPh3)(C14H10NO2S-pz)] (2) [pz = pyrazole (C3H2N2)] have been obtained unexpectedly from chromone thiosemicarbazones (L1 and L2) and [PdCl2(PPh3)2]. The compounds have been fully characterized by physicochemical studies. The single crystal X-ray diffraction and spectral studies revealed square planar geometry for the complexes. The conversion of chromone thiosemicarbazone into pyrazole based thiourea might have happened through coordination to palladium(II) ion after enolization, Michael addition and ring opening followed by cyclization. To the best of our knowledge, this is the first report for the conversion of chromone thiosemicarbazone into pyrazole based thiourea moiety. Plausible mechanism was proposed based on the spectroscopic studies. Calf thymus (CT) DNA binding of the compounds was explored using various spectroscopic and molecular docking methods. DNA cleavage studies suggested that complexes 1 and 2 had the capacity to cleave the supercoiled DNA (pUC19) to its naked form. In vitro cytotoxic property of the ligands and complexes has been evaluated against three human cancer cells such as A549, HepG-2 and U937. Complex 2 exhibited potent cytotoxic activity against HepG-2 cells with the IC50 value of 10.4 μM. In addition, mechanistic studies showed that complex 2 induced apoptosis through mitochondrial signaling pathway in HepG-2 cells. Beneficially, complex 2 showed less toxicity against human lung (IMR90) normal cells and hence it emerges as a potential candidate for further studies.
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Affiliation(s)
- Jebiti Haribabu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India; Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
| | - Chandrasekar Balachandran
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
| | - Manoharan Muthu Tamizh
- Department of Chemistry, Siddha Central Research Institute, Central Council for Research in Siddha, Arumbakkam, Chennai 600106, India
| | - Yuvaraj Arun
- Organic Chemistry Division, CSIR-Central Leather Research Institute, Chennai 600020, India
| | | | - Shin Aoki
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan; Research Institute of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
| | - Ramasamy Karvembu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India.
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8
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Carneiro ZA, Lima JC, Lopes CD, Gaspari APS, de Albuquerque S, Dinelli LR, Veloso-Silva LLW, Paganelli MO, Libardi SH, Oliveira CG, Deflon VM, Oliveira RJ, Borges JC, Maia PIS. Heterobimetallic nickel(II) and palladium(II) complexes derived from S-benzyl-N- (ferrocenyl)methylenedithiocarbazate: Trypanocidal activity and interaction with Trypanosoma cruzi Old Yellow Enzyme (TcOYE). Eur J Med Chem 2019; 180:213-223. [PMID: 31306908 DOI: 10.1016/j.ejmech.2019.07.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/10/2019] [Accepted: 07/04/2019] [Indexed: 10/26/2022]
Abstract
Reactions of Ni(II) and Pd(II) precursors with S-benzyl-N-(ferrocenyl)methylenedithiocarbazate (HFedtc) led to the formation of heterobimetallic complexes of the type [MII(Fedtc)2] (M = Ni and Pd). The characterization of the compounds involved the determination of melting point, FTIR, UV-Vis, 1H NMR, elemental analysis and electrochemical experiments. Furthermore, the crystalline structures of HFedtc and [NiII(Fedtc)2] were determined by single crystal X-ray diffraction. The compounds were evaluated against the intracellular form of Trypanosoma cruzi (Tulahuen Lac-Z strain) and the cytotoxicity assays were assessed using LLC-MK2 cells. The results showed that the coordination of HFedtc to Ni(II) or Pd(II) decreases the in vitro trypanocidal activity while the cytotoxicity against LLC-MK2 cells does not change significantly. [PdII(Fedtc)2] showed the greater potential between the two complexes studied, showing an SI value of 8.9. However, this value is not better than that of the free ligand with an SI of 40, a similar value to that of the standard drug benznidazole (SI = 48). Additionally, molecular docking simulations were performed with Trypanosoma cruzi Old Yellow Enzyme (TcOYE), which predicted that HFedtc binds to the protein, almost parallel to the flavin mononucleotide (FMN) prosthetic group, while the [NiII(Fedtc)2] complex was docked into the enzyme binding site in a significantly different manner. In order to confirm the hypothetical interaction, in vitro experiments of fluorescence quenching and enzymatic activity were performed which indicated that, although HFedtc was not processed by the enzyme, it was able to act as a competitive inhibitor, blocking the hydride transfer from the FMN prosthetic group of the enzyme to the menadione substrate.
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Affiliation(s)
- Zumira A Carneiro
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Jackelinne C Lima
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil
| | - Carla D Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Ana P S Gaspari
- Instituto Federal do Paraná - Campus Paranavaí, Av. José Felipe Tequinha, 1400, 87703-536, Paranavaí, PR, Brazil
| | - Sergio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Luis R Dinelli
- Faculdade de Ciências Integrada do Pontal, Universidade Federal de Uberlândia, Rua vinte, 1600, 38304-402, Ituiutaba, MG, Brazil
| | - Laudimir L W Veloso-Silva
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Marcella O Paganelli
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Silvia H Libardi
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Carolina G Oliveira
- Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121, 38400-902, Uberlândia, MG, Brazil
| | - Victor M Deflon
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Ronaldo J Oliveira
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil
| | - Júlio C Borges
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Pedro I S Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil.
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9
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Rivas F, Medeiros A, Rodríguez Arce E, Comini M, Ribeiro CM, Pavan FR, Gambino D. New heterobimetallic ferrocenyl derivatives: Evaluation of their potential as prospective agents against trypanosomatid parasites and Mycobacterium tuberculosis. J Inorg Biochem 2018; 187:73-84. [PMID: 30055398 DOI: 10.1016/j.jinorgbio.2018.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 06/26/2018] [Accepted: 07/21/2018] [Indexed: 12/21/2022]
Abstract
Searching for prospective agents against infectious diseases, four new ferrocenyl derivatives, [M(L)(dppf)4](PF6), with M = Pd(II) or Pt(II), dppf = 1,1'-bis(dipheny1phosphino) ferrocene and HL = tropolone (HTrop) or hinokitiol (HHino), were synthesized and characterized. Complexes and ligands were evaluated against the bloodstream form of T. brucei, L. infantum amastigotes, M. tuberculosis (MTB) sensitive strain and MTB clinical isolates. Complexes showed a significant increase of the anti-T. brucei activity with respect to the free ligands (>28- and >46-fold for Trop and 6- and 22-fold for Hino coordinated to Pt-dppf and Pd-dppf, respectively), yielding IC50 values < 5 μM. The complexes proved to be more potent than the antitrypanosomal drug Nifurtimox. The new ferrocenyl derivatives were more selective towards the parasite than the free ligands. The Pt compounds were less toxic on J774 murine macrophages (mammalian cell model), than the Pd ones, showing selectivity index values (SI = IC50 murine macrophage/IC50T. brucei) up to 23. Generation of the {M-dppf} compounds lead to a slightly positive impact on the anti-leishmanial potency. Although the ferrocenyl derivatives were more active on sensitive MTB than the free ligands (MIC90 = 9.88-14.73 μM), they showed low selectivity towards the pathogen. Related to the mechanism of action, the antiparasitic effect cannot be ascribed to an interference of the compounds with the thiol-redox homeostasis of the pathogen. Fluorescence measurements pointed at DNA as a probable target of the new compounds. [Pt(Trop)(dppf)](PF6) and [Pt(Hino)(dppf)](PF6) could be considered prospective anti-T. brucei agents that deserve further research.
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Affiliation(s)
- Feriannys Rivas
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Andrea Medeiros
- Group Redox Biology of Trypanosomes, Institut Pasteur Montevideo, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Esteban Rodríguez Arce
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Marcelo Comini
- Group Redox Biology of Trypanosomes, Institut Pasteur Montevideo, Montevideo, Uruguay
| | | | | | - Dinorah Gambino
- Área Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
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10
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Mosquillo MF, Bilbao L, Hernández F, Tissot F, Gambino D, Garat B, Pérez-Díaz L. Trypanosoma cruzibiochemical changes and cell death induced by an organometallic platinum-based compound. Chem Biol Drug Des 2018; 92:1657-1669. [DOI: 10.1111/cbdd.13332] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/23/2018] [Accepted: 04/21/2018] [Indexed: 02/06/2023]
Affiliation(s)
- M. Florencia Mosquillo
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Lucía Bilbao
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Fabricio Hernández
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Florencia Tissot
- Cátedra de Química Analítica; Facultad de Química; Universidad de la República; Montevideo Uruguay
| | - Dinorah Gambino
- Cátedra de Química Inorgánica; Facultad de Química; Universidad de la República; Montevideo Uruguay
| | - Beatriz Garat
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Leticia Pérez-Díaz
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
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11
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Cyrhetrenylaniline and new organometallic phenylimines derived from 4- and 5-nitrothiophene: Synthesis, characterization, X-Ray structures, electrochemistry and in vitro anti- T. brucei activity. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.03.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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12
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Lunagariya MV, Thakor KP, Varma RR, Waghela BN, Pathak C, Patel MN. Synthesis, characterization and biological application of 5-quinoline 1,3,5-trisubstituted pyrazole based platinum(ii) complexes. MEDCHEMCOMM 2018; 9:282-298. [PMID: 30108922 PMCID: PMC6083784 DOI: 10.1039/c7md00472a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 12/11/2017] [Indexed: 02/03/2023]
Abstract
Square planar mononuclear platinum(ii) complexes were synthesized in the presence of neutral bidentate heterocyclic (5-quinoline 1,3,5-tri-substituted pyrazole scaffold) ligands and K2PtCl4 salt. The synthesized compounds were characterized by micro-elemental analysis, FT-IR, UV-vis, 1H NMR, 13C NMR, TGA, mass spectrometry and molar conductivity. Their biological activities were investigated by in vitro brine shrimp lethality bioassay, in vitro antimicrobial study against five different pathogens, in vivo cellular level cytotoxicity against Schizosaccharomyces pombe cells, and in vitro anti-proliferation assay. The binding constant Ksv, Kb, Ka values of the complexes were determined by DNA interaction studies. The gel electrophoresis assay was carried out to examine the effect of the complexes on the DNA nuclease of pUC19 plasmid DNA. The docking energies of the ligands (L1-L5 ) and complexes (I-V) were observed in the range of -265.14 to -284.33 kJ mol-1. The synthesized Pt(ii) complexes (I-V) were screened against the MCF-7 (human breast adenocarcinoma) and HCT-116 (human colon carcinoma) cancer cell lines.
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Affiliation(s)
- Miral V Lunagariya
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
| | - Khyati P Thakor
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
| | - Reena R Varma
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
| | - Bhargav N Waghela
- Department of Cell Biology , School of Biological Sciences and Biotechnology , Indian Institute of Advanced Research , Koba Institutional Area , Gandhinagar-382007 , Gujarat , India . Tel: +91 79 30514245
| | - Chandramani Pathak
- Department of Cell Biology , School of Biological Sciences and Biotechnology , Indian Institute of Advanced Research , Koba Institutional Area , Gandhinagar-382007 , Gujarat , India . Tel: +91 79 30514245
| | - Mohan N Patel
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
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13
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Zou S, Li G, Rees TW, Jin C, Huang J, Chen Y, Ji L, Chao H. Interfering with DNA High-Order Structures using Chiral Ruthenium(II) Complexes. Chemistry 2017; 24:690-698. [PMID: 29112314 DOI: 10.1002/chem.201704403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Indexed: 12/31/2022]
Abstract
In this work, it was found that DNA can undergo B-Z transformational changes and compaction in the presence of DNA intercalators such as ruthenium(II) polypyridyl complexes. The link between B-Z transition and condensation is weak but can be strengthened under certain circumstances with slight alterations to the structures of the ruthenium(II) complexes. Here, following on from previous research, this work reports a series of ruthenium(II) complexes with imidazophenanthroline ligands, which vary in size and planarity. The complexes exhibit distinct effects on DNA structures, ranging from little impact to the transformation of DNA secondary structures to the formation of higher-order DNA structures. Further studies on DNA morphological changes induced by chiral ruthenium(II) complexes are observed by atomic force microscopy and transmission electron microscopy.
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Affiliation(s)
- Shanshan Zou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Guanying Li
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Thomas W Rees
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Chengzhi Jin
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Juanjuan Huang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Yu Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Liangnian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
| | - Hui Chao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China
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Gonçalves AC, Carneiro ZA, Oliveira CG, Danuello A, Guerra W, Oliveira RJ, Ferreira FB, Veloso-Silva LL, Batista FA, Borges JC, de Albuquerque S, Deflon VM, Maia PI. Pt II , Pd II and Au III complexes with a thiosemicarbazone derived from diacethylmonooxime: Structural analysis, trypanocidal activity, cytotoxicity and first insight into the antiparasitic mechanism of action. Eur J Med Chem 2017; 141:615-631. [DOI: 10.1016/j.ejmech.2017.10.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/19/2017] [Accepted: 10/07/2017] [Indexed: 11/28/2022]
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15
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Rhenium(I) tricarbonyl compounds of bioactive thiosemicarbazones: Synthesis, characterization and activity against Trypanosoma cruzi. J Inorg Biochem 2017; 170:125-133. [DOI: 10.1016/j.jinorgbio.2017.01.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/29/2016] [Accepted: 01/20/2017] [Indexed: 11/22/2022]
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16
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Mavroidi B, Sagnou M, Stamatakis K, Paravatou-Petsotas M, Pelecanou M, Methenitis C. Palladium(II) and platinum(II) complexes of derivatives of 2-(4′-aminophenyl)benzothiazole as potential anticancer agents. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.01.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Fernández M, Arce ER, Sarniguet C, Morais TS, Tomaz AI, Azar CO, Figueroa R, Diego Maya J, Medeiros A, Comini M, Helena Garcia M, Otero L, Gambino D. Novel ruthenium(II) cyclopentadienyl thiosemicarbazone compounds with antiproliferative activity on pathogenic trypanosomatid parasites. J Inorg Biochem 2015; 153:306-314. [PMID: 26275470 DOI: 10.1016/j.jinorgbio.2015.06.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/22/2015] [Accepted: 06/24/2015] [Indexed: 10/23/2022]
Abstract
Searching for new prospective antitrypanosomal agents, three novel Ru(II)-cyclopentadienyl compounds, [Ru(η(5)-C5H5)(PPh3)L], with HL=bioactive 5-nitrofuryl containing thiosemicarbazones were synthesized and characterized in the solid state and in solution. The compounds were evaluated in vitro on the blood circulating trypomastigote form of Trypanosoma cruzi (Dm28c strain), the infective form of Trypanosoma brucei brucei (strain 427) and on J774 murine macrophages and human-derived EA.hy926 endothelial cells. The compounds were active against both parasites with IC50 values in the micromolar or submicromolar range. Interestingly, they are much more active on T. cruzi than previously developed Ru(II) classical and organometallic compounds with the same bioactive ligands. The new compounds showed moderate to very good selectivity towards the parasites in respect to mammalian cells. The global results point at [RuCp(PPh3)L2] (L2=N-methyl derivative of 5-nitrofuryl containing thiosemicarbazone and Cp=cyclopentadienyl) as the most promising compound for further developments (IC50T. cruzi=0.41μM; IC50T. brucei brucei=3.5μM). Moreover, this compound shows excellent selectivity towards T. cruzi (SI>49) and good selectivity towards T. brucei brucei (SI>6). In order to get insight into the mechanism of antiparasitic action, the intracellular free radical production capacity of the new compounds was assessed by ESR. DMPO (5,5-dimethyl-1-pirroline-N-oxide) spin adducts related to the bioreduction of the complexes and to redox cycling processes were characterized. In addition, DNA competitive binding studies with ethidium bromide by fluorescence measurements showed that the compounds interact with this biomolecule.
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Affiliation(s)
- Mariana Fernández
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Esteban Rodríguez Arce
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Cynthia Sarniguet
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Tânia S Morais
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Portugal
| | - Ana Isabel Tomaz
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Portugal
| | - Claudio Olea Azar
- Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Roberto Figueroa
- Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - J Diego Maya
- Programa de Farmacología Molecular y Clínica, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Andrea Medeiros
- Institut Pasteur de Montevideo, Group Redox Biology of Trypanosomes, Montevideo, Uruguay; Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Marcelo Comini
- Institut Pasteur de Montevideo, Group Redox Biology of Trypanosomes, Montevideo, Uruguay
| | - M Helena Garcia
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Portugal
| | - Lucía Otero
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
| | - Dinorah Gambino
- Cátedra de Química Inorgánica, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
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18
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Cipriani M, Toloza J, Bradford L, Putzu E, Vieites M, Curbelo E, Tomaz AI, Garat B, Guerrero J, Gancheff JS, Maya JD, Olea Azar C, Gambino D, Otero L. Effect of the Metal Ion on the antiT. cruziActivity and Mechanism of Action of 5-Nitrofuryl-Containing Thiosemicarbazone Metal Complexes. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402614] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Machado I, Fernández M, Becco L, Garat B, Brissos R, Zabarska N, Gamez P, Marques F, Correia I, Costa Pessoa J, Gambino D. New metal complexes of NNO tridentate ligands: Effect of metal center and co-ligand on biological activity. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.10.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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20
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Zhao MX, Zhao M, Zeng EZ, Li Y, Li JM, Cao Q, Tan CP, Ji LN, Mao ZW. Enhanced anti-cancer efficacy to cancer cells by doxorubicin loaded water-soluble amino acid-modified β-cyclodextrin platinum complexes. J Inorg Biochem 2014; 137:31-9. [DOI: 10.1016/j.jinorgbio.2014.03.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 03/20/2014] [Accepted: 03/21/2014] [Indexed: 12/15/2022]
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21
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Sarniguet C, Toloza J, Cipriani M, Lapier M, Vieites M, Toledano-Magaña Y, García-Ramos JC, Ruiz-Azuara L, Moreno V, Maya JD, Azar CO, Gambino D, Otero L. Water-soluble ruthenium complexes bearing activity against protozoan parasites. Biol Trace Elem Res 2014; 159:379-92. [PMID: 24740394 DOI: 10.1007/s12011-014-9964-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Accepted: 03/31/2014] [Indexed: 01/18/2023]
Abstract
Parasitic illnesses are major causes of human disease and misery worldwide. Among them, both amebiasis and Chagas disease, caused by the protozoan parasites, Entamoeba histolytica and Trypanosoma cruzi, are responsible for thousands of annual deaths. The lack of safe and effective chemotherapy and/or the appearance of current drug resistance make the development of novel pharmacological tools for their treatment relevant. In this sense, within the framework of the medicinal inorganic chemistry, metal-based drugs appear to be a good alternative to find a pharmacological answer to parasitic diseases. In this work, novel ruthenium complexes [RuCl2(HL)(HPTA)2]Cl2 with HL=bioactive 5-nitrofuryl containing thiosemicarbazones and PTA=1,3,5-triaza-7-phosphaadamantane have been synthesized and fully characterized. PTA was included as co-ligand in order to modulate complexes aqueous solubility. In fact, obtained complexes were water soluble. Their activity against T. cruzi and E. histolytica was evaluated in vitro. [RuCl2(HL4)(HPTA)2]Cl2 complex, with HL4=N-phenyl-5-nitrofuryl-thiosemicarbazone, was the most active compound against both parasites. In particular, it showed an excellent activity against E. histolytica (half maximal inhibitory concentration (IC50)=5.2 μM), even higher than that of the reference drug metronidazole. In addition, this complex turns out to be selective for E. histolytica (selectivity index (SI)>38). The potential mechanism of antiparasitic action of the obtained ruthenium complexes could involve oxidative stress for both parasites. Additionally, complexes could interact with DNA as second potential target by an intercalative-like mode. Obtained results could be considered a contribution in the search for metal compounds that could be active against multiple parasites.
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Affiliation(s)
- Cynthia Sarniguet
- Cátedra de Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Gral. Flores 2124, C. C. 1157, 11800, Montevideo, Uruguay
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22
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Fernández M, Becco L, Correia I, Benítez J, Piro OE, Echeverria GA, Medeiros A, Comini M, Lavaggi ML, González M, Cerecetto H, Moreno V, Pessoa JC, Garat B, Gambino D. Oxidovanadium(IV) and dioxidovanadium(V) complexes of tridentate salicylaldehyde semicarbazones: Searching for prospective antitrypanosomal agents. J Inorg Biochem 2013; 127:150-60. [DOI: 10.1016/j.jinorgbio.2013.02.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 02/20/2013] [Accepted: 02/20/2013] [Indexed: 12/29/2022]
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23
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Demoro B, Rossi M, Caruso F, Liebowitz D, Olea-Azar C, Kemmerling U, Maya JD, Guiset H, Moreno V, Pizzo C, Mahler G, Otero L, Gambino D. Potential mechanism of the anti-trypanosomal activity of organoruthenium complexes with bioactive thiosemicarbazones. Biol Trace Elem Res 2013; 153:371-81. [PMID: 23564472 DOI: 10.1007/s12011-013-9653-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 03/25/2013] [Indexed: 11/26/2022]
Abstract
In the search for new metal-based drugs against diseases produced by trypanosomatid parasites, four organoruthenium(II) compounds [Ru2(p-cymene)2(L)2]X2, where L are bioactive 5-nitrofuryl-containing thiosemicarbazones and X = Cl or PF6, had been previously obtained. These compounds had shown activity on Trypanosoma brucei, the etiological agent of African trypanosomiasis. Because of genomic similarities between trypanosomatides, these ruthenium compounds were evaluated, in the current work, on Trypanosoma cruzi, the parasite responsible of American trypanosomiasis (Chagas disease). Two of them showed significant in vitro growth inhibition activity against the infective trypomastigote form of T. cruzi (Dm28c clone, IC50 = 11.69 and 59.42 μM for [Ru2(p-cymene)2(L4)2]Cl2 and [Ru2(p-cymene)2(L1)2]Cl2, respectively, where HL4 = 5-nitrofuryl-N-phenylthiosemicarbazone and HL1 = 5-nitrofurylthiosemicarbazone), showing fairly good selectivities toward trypanosomes with respect to mammalian cells (J774 murine macrophages). Moreover, [Ru2(p-cymene)2(L2)2]Cl2, where HL2 = 5-nitrofuryl-N-methylthiosemicarbazone, was synthesized in order to evaluate the effect of improved solubility on biological behavior. This new chloride salt showed higher activity against T. cruzi than that of the previously synthesized hexafluorophosphate one (Dm28c clone, IC50 = 14.30 μM for the former and 231.3 μM for the latter). In addition, the mode of antitrypanosomal action of the organoruthenium compounds was investigated. The complexes were not only able to generate toxic free radicals through bioreduction but they also interacted with two further potential parasite targets: DNA and cruzipain, a cysteine protease which plays a fundamental role in the biological cycle of these parasites. The results suggest a "multi-target" mechanism of trypanosomicidal action for the obtained complexes.
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Affiliation(s)
- Bruno Demoro
- Cátedra de Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República (UdelaR), Gral. Flores 2124, 11800 Montevideo, Uruguay
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Krogul A, Cedrowski J, Wiktorska K, Oziminski WP, Skupińska J, Litwinienko G. Biological activity of Pd(II) complexes with mono- and disubstituted pyridines—Experimental and theoretical studies. Bioorg Med Chem Lett 2013; 23:2765-8. [DOI: 10.1016/j.bmcl.2013.02.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Revised: 02/06/2013] [Accepted: 02/11/2013] [Indexed: 10/27/2022]
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25
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Benítez J, Correia I, Becco L, Fernández M, Garat B, Gallardo H, Conte G, Kuznetsov ML, Neves A, Moreno V, Costa Pessoa J, Gambino D. Searching for Vanadium-Based Prospective Agents againstTrypanosoma cruzi: Oxidovanadium(IV) Compounds with Phenanthroline Derivatives as Ligands. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300057] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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26
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Fernández M, Varela J, Correia I, Birriel E, Castiglioni J, Moreno V, Costa Pessoa J, Cerecetto H, González M, Gambino D. A new series of heteroleptic oxidovanadium(iv) compounds with phenanthroline-derived co-ligands: selective Trypanosoma cruzi growth inhibitors. Dalton Trans 2013; 42:11900-11. [DOI: 10.1039/c3dt50512j] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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27
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Santos D, Parajón-Costa B, Rossi M, Caruso F, Benítez D, Varela J, Cerecetto H, González M, Gómez N, Caputto ME, Moglioni AG, Moltrasio GY, Finkielsztein LM, Gambino D. Activity on Trypanosoma cruzi, erythrocytes lysis and biologically relevant physicochemical properties of Pd(II) and Pt(II) complexes of thiosemicarbazones derived from 1-indanones. J Inorg Biochem 2012; 117:270-6. [DOI: 10.1016/j.jinorgbio.2012.08.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 08/21/2012] [Accepted: 08/21/2012] [Indexed: 10/27/2022]
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Chellan P, Land KM, Shokar A, Au A, An SH, Clavel CM, Dyson PJ, Kock CD, Smith PJ, Chibale K, Smith GS. Exploring the Versatility of Cycloplatinated Thiosemicarbazones as Antitumor and Antiparasitic Agents. Organometallics 2012. [DOI: 10.1021/om300334z] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Prinessa Chellan
- Department
of Chemistry, University of Cape Town, Private Bag, Rondebosch 7701, South Africa
| | - Kirkwood M. Land
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Ajit Shokar
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Aaron Au
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Seung Hwan An
- Department of Biological Sciences, University of the Pacific, Stockton, California 95211, United States
| | - Catherine M. Clavel
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Paul J. Dyson
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Carmen de Kock
- Division of Pharmacology, Department of Medicine, University of Cape Town, K45, OMB, Groote Schuur Hospital,
Observatory, 7925, South Africa
| | - Peter J. Smith
- Division of Pharmacology, Department of Medicine, University of Cape Town, K45, OMB, Groote Schuur Hospital,
Observatory, 7925, South Africa
| | - Kelly Chibale
- Department
of Chemistry, University of Cape Town, Private Bag, Rondebosch 7701, South Africa
- Institute of Infectious Disease
and Molecular Medicine, University of Cape Town, Rondebosch
7701, South Africa
| | - Gregory S. Smith
- Department
of Chemistry, University of Cape Town, Private Bag, Rondebosch 7701, South Africa
| |
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