1
|
Patra A, Carrella LM, Vojtíšek P, Rentschler E, Manna SC. Opposing magnetic communications in two dinuclear Ni(II) complexes: Ferromagnetic Ni-N-Ni and antiferromagnetic Ni-O-Ni moiety. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
2
|
Patra A, Puschmann H, Manna SC. Bidentate Schiff base coordinated square planer nickel(II) complexes: Synthesis, crystal structure, DFT/TD-DFT calculation and DNA/protein binding. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115146] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
3
|
Nunes CJ, Otake AH, Bustos SO, Fazzi RB, Chammas R, Da Costa Ferreira AM. Unlike reactivity of mono- and binuclear imine-copper(II) complexes toward melanoma cells via a tyrosinase-dependent mechanism. Chem Biol Interact 2019; 311:108789. [PMID: 31401089 DOI: 10.1016/j.cbi.2019.108789] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 07/24/2019] [Accepted: 08/07/2019] [Indexed: 01/03/2023]
Abstract
The cytotoxicity of a dinuclear imine-copper (II) complex 2, and its analogous mononuclear complex 1, toward different melanoma cells, particularly human SKMEL-05 and SKMEL-147, was investigated. Complex 2, a tyrosinase mimic, showed much higher activity in comparison to complex 1, and its reactivity was verified to be remarkably activated by UVB-light, while the mononuclear compound showed a small or negligible effect. Further, a significant dependence on the melanin content in the tumor cells, both from intrinsic pigmentation or stimulated by irradiation, was observed in the case of complex 2. Similar tests with keratinocytes and melanocytes indicated a much lower sensitivity to both copper (II) complexes, even after exposition to UV light. Clonogenic assays attested that the fractions of melanoma cells survival were much lower under treatment with complex 2 compared to complex 1, both with or without previous irradiation of the cells. The process also involves generation of reactive oxygen species (ROS), as verified by EPR spectroscopy, and by using fluorescence indicators. Autophagic assays indicated a remarkable formation of cytoplasmic vacuoles in melanomas treated with complex 2, while this effect was not observed in similar treatment with complex 1. Monitoring of specific protein LC3 corroborated the simultaneous occurrence of autophagy. A balance interplay between different modes of cell death, apoptosis and autophagy, occurs when melanomas were treated with the dinuclear complex 2, in contrast to the mononuclear complex 1. These results pointed out to different mechanisms of action of such complexes, depending on its nuclearity.
Collapse
Affiliation(s)
- Cléia Justino Nunes
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil
| | - Andréia Hanada Otake
- Instituto do Câncer do Estado de São Paulo (ICESP), Faculdade de Medicina, Universidade de São Paulo, São Paulo, 01246-000, SP, Brazil
| | - Silvina Odete Bustos
- Instituto do Câncer do Estado de São Paulo (ICESP), Faculdade de Medicina, Universidade de São Paulo, São Paulo, 01246-000, SP, Brazil
| | - Rodrigo Boni Fazzi
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil
| | - Roger Chammas
- Instituto do Câncer do Estado de São Paulo (ICESP), Faculdade de Medicina, Universidade de São Paulo, São Paulo, 01246-000, SP, Brazil
| | - Ana Maria Da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, 05508-000, SP, Brazil.
| |
Collapse
|
4
|
Shahabadi N, Akhtarshenas S, Hadidi S. Synthesis, characterization and DNA interaction studies of new copper complex containing pseudoephedrine hydrochloride drug. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 38:680-699. [PMID: 30942140 DOI: 10.1080/15257770.2019.1599909] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A new copper(II) complex, [Cu(pse)(phen)Cl2]; in which phen = 1,10-phenanthroline and pse = pseudoephedrine hydrochloride drug; was synthesized and characterized by FT-IR, Mass and UV-Vis spectroscopy in combination with computational methods. Binding interaction of this complex with calf thymus DNA (ct-DNA) has been investigated by absorption, emission, circular dichroism, molecular docking and viscosity measurements. The complex displays significant binding properties of ct-DNA. The results of fluorescence and UV-Vis absorption spectroscopy indicated that, this complex interacted with ct-DNA in a groove-binding mode, and the binding constant was 8 × 104 L mol-1. Competitive fluorimetric studies with Hoechst 33258 have shown that Cu(II) complex exhibit the ability to displace the DNA-bound Hoechst 33258 indicating that it binds to DNA in strong competition with Hoechst 33258 for the groove binding. Furthermore, the complex induces detectable changes in the CD spectrum of ct-DNA and does not induce any changes in DNA viscosity which verified the groove-binding mode. The molecular modeling results illustrated that the complex strongly binds to groove of DNA by relative binding energy of docked structure (-27.61 kJ mol-1).
Collapse
Affiliation(s)
- Nahid Shahabadi
- a Department of Inorganic chemistry Faculty of Chemistry , Razi University , Kermanshah , Iran.,b Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Shirin Akhtarshenas
- a Department of Inorganic chemistry Faculty of Chemistry , Razi University , Kermanshah , Iran
| | - Saba Hadidi
- a Department of Inorganic chemistry Faculty of Chemistry , Razi University , Kermanshah , Iran.,b Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences , Kermanshah , Iran
| |
Collapse
|
5
|
Lima S, Banerjee A, Mohanty M, Sahu G, Kausar C, Patra SK, Garribba E, Kaminsky W, Dinda R. Synthesis, structure and biological evaluation of mixed ligand oxidovanadium(iv) complexes incorporating 2-(arylazo)phenolates. NEW J CHEM 2019. [DOI: 10.1039/c9nj01910c] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Synthesis and characterization of mixed ligand oxidovanadium(iv) complexes [VIVO(L1–4)(LNN)] incorporating arylazo ligands: evaluation of DNA/BSA interaction and cytotoxicity activity.
Collapse
Affiliation(s)
- Sudhir Lima
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Atanu Banerjee
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Monalisa Mohanty
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Gurunath Sahu
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Chahat Kausar
- Department of Life Science
- National Institute of Technology
- Rourkela
- India
| | - Samir Kumar Patra
- Department of Life Science
- National Institute of Technology
- Rourkela
- India
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia
- Università di Sassari
- I-07100 Sassari
- Italy
| | | | - Rupam Dinda
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| |
Collapse
|
6
|
Double μ2-(phenoxido)-bridged dinuclear and polynuclear nickel(II) complexes: Magnetic properties and DNA/protein interaction. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.09.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
7
|
Zheng Z, Li H, Sun S, Xu Y. Media Dependent Switching of Selectivity and Continuous near Infrared Turn-on Fluorescence Response through Cascade Interactions from Noncovalent to Covalent Binding for Detection of Serum Albumin in Living Cells. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44336-44343. [PMID: 30514088 DOI: 10.1021/acsami.8b19768] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Abnormal level of proteins is proved to be associated with diseases. Thus, protein sensing is helpful for clinical diagnosis and therapy. However, there is a great variety of protein species and relatively low concentration of each protein in complicated biological systems including other nonprotein biomolecules. Therefore, it remains challenging to develop an effective method for detecting protein with high selectivity and sensitivity. Herein, a new self-assembly method based on a robust dye SQSS of which two squaraine molecules were conjugated through disulfide bond was developed for highly selective and sensitive detection of serum albumin (SA) in aqueous solution and live cells. SQSS can self-assemble into "compact" aggregates, offering "inert" disulfide group and very low background fluorescence through the combination of aggregation quenching and homogeneous fluorescence resonance energy transfer (homoFRET) quenching. The response of SQSS to SA undergoes two cascade stages. At the first stage, SA drives the compact assemblies of SQSS to form loose ones with fast speed (30 s) through noncovalent interaction, resulting in the enhancement of fluorescence to some extent. In this loose assembly state, the disulfide bond in SQSS is reactive. At the second stage, the Cys34 in SA slowly induced further disassembly through covalent binding with reactive disulfide bond, resulting in fluorescence further increasing and SQSS labeling to SA that cannot be displaced by site binding ligands of SA. The self-assemblies of SQSS can selectively detect SA with continuous near-infrared (NIR) turn-on fluorescence response in 100% aqueous buffer solution. In addition, SQSS showed the potential application of imaging SA in living cells. On the other hand, the loose assembly state of SQSS was also achieved in aqueous solution with 20% CH3CN. In this media, thiol-containing glutathione (GSH) caused the disassembly of SQSS with turn-on fluorescence response through interaction with disulfide bond. SQSS can selectively recognize GSH over other amino acids even in the presence of other sulfhydryl amino acids. As a proof-of-concept method, the molecular self-assembly through multisteps interactions would provide an ideal strategy for detection and live-cell imaging of biorelated molecules with high selectivity and signal-to-noise ratio.
Collapse
Affiliation(s)
- Ziming Zheng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
| | - Hongjuan Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
| | - Shiguo Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
| | - Yongqian Xu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , P.R. China
| |
Collapse
|
8
|
Martini N, Parente JE, D Alessandro F, Rey M, Rizzi A, Williams PAM, Ferrer EG. Potential bio-protective effect of copper compounds: mimicking SOD and peroxidases enzymes and inhibiting acid phosphatase as a target for anti-osteoporotic chemotherapeutics. Mol Biol Rep 2018; 46:867-885. [PMID: 30506507 DOI: 10.1007/s11033-018-4542-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 11/28/2018] [Indexed: 11/28/2022]
Abstract
Copper complexes with transformed methimazole ligand have been synthesized and characterized by elemental analysis, conductivity measurements, thermogravimetric analysis, EPR, FTIR and UV-Vis spectroscopies. Results support their stoichiometries and geometrical structures: [Cu(C4H5N2S)2Cl2]·2H2O(1), [Cu(C8H10N4S)SO4H2O](2) and [Cu(C8H10N4S)SO4](3). ((C4H5N2)2S: bis(l-methylimidazol-2-yl)sulfide; (C4H5N2S)2 = Bis[bis(l-methylimidazol-2-yl)disulfide]) Concurrently, the structurally distinct soluble species corresponding to complexes (1) and (2) were subsequently used in an in vitro investigation of their potential biological properties. In view of their possible pharmaceutical activity, the complexes were in vitro evaluated as phosphatase acid inhibitors. Their radical bio-protective effects were also studied measuring the effect against DPPH• and O2•- radicals. Additional catalytic properties as peroxidase mimics were evaluated using Michaelis-Menten kinetic model by means of phenol red and pyrogallol assays. The complexes exhibited catalytic bromination activity and the ability to oxidize pyrogallol substrate indicating that they can be considered as functional models. The relationships between the structures and the in vitro biological activities have also been considered. Serum protein albumin has attracted the greatest interest as drug carrier and the affinity of biological/pharmaceutical compound is relevant to the development of new medicine. In that sense, interaction studies by fluorescence and EPR spectroscopies were performed showing the binding capacity of the complexes.
Collapse
Affiliation(s)
- Nancy Martini
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Juliana E Parente
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Franco D Alessandro
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Marilin Rey
- Physics Department, Faculty of Biochemistry and Biological Sciences, National University of the Litoral, Ciudad Universitaria-Paraje El Pozo, 3000, Santa Fe, Argentina
| | - Alberto Rizzi
- Physics Department, Faculty of Biochemistry and Biological Sciences, National University of the Litoral, Ciudad Universitaria-Paraje El Pozo, 3000, Santa Fe, Argentina
| | - Patricia A M Williams
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Evelina G Ferrer
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina.
| |
Collapse
|
9
|
Das K, Dolai S, Vojtíšek P, Manna SC. Protein binding, DFT/TDDFT calculation and catecholase activity of five coordinated distorted square pyramidal/trigonal bipyramidal Cu(II) complexes. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
10
|
Galkina PА, Proskurnin МА. Supramolecular interaction of transition metal complexes with albumins and DNA: Spectroscopic methods of estimation of binding parameters. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Polina А. Galkina
- Moscow State M.V. Lomonosov University; Department of Chemistry; Leninskiye Gory 1, bld. 3 119991 Moscow Russia
| | - Мikhail А. Proskurnin
- Moscow State M.V. Lomonosov University; Department of Chemistry; Leninskiye Gory 1, bld. 3 119991 Moscow Russia
| |
Collapse
|
11
|
Vieira AP, Wegermann CA, Da Costa Ferreira AM. Comparative studies of Schiff base-copper(ii) and zinc(ii) complexes regarding their DNA binding ability and cytotoxicity against sarcoma cells. NEW J CHEM 2018. [DOI: 10.1039/c7nj04799a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schiff base-copper(ii) and zinc(ii) complexes were prepared and characterized, and their binding ability to DNA and cytotoxicity against healthy and carcinogenic cells were studied.
Collapse
Affiliation(s)
- Adriana Pires Vieira
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo
- Brazil
| | - Camila Anchau Wegermann
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo
- Brazil
| | | |
Collapse
|
12
|
Das M, Mandal P, Malviya N, Choudhuri I, Charmier MAJ, Morgado S, Mobin SM, Pathak B, Mukhopadhyay S. Copper complexes with a flexible piperazinyl arm: nuclearity driven catecholase activity and interactions with biomolecules. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1236193] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mriganka Das
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Poulami Mandal
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Novina Malviya
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Indrani Choudhuri
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Maria Adilia Januário Charmier
- Faculty of Engineering, Universidade Lusófona, Lisbon, Portugal
- CQE, Instituto Superior Técnico-Universidade de Lisboa (IST-UL), Lisbon, Portugal
| | - Susana Morgado
- Faculty of Engineering, Universidade Lusófona, Lisbon, Portugal
| | - Shaikh M. Mobin
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Biswarup Pathak
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Suman Mukhopadhyay
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| |
Collapse
|
13
|
Saini AK, Kumari P, Sharma V, Mathur P, Mobin SM. Varying structural motifs in the salen based metal complexes of Co(ii), Ni(ii) and Cu(ii): synthesis, crystal structures, molecular dynamics and biological activities. Dalton Trans 2016; 45:19096-19108. [DOI: 10.1039/c6dt03573f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four new metal complexes which demonstrates varying structural motifs from monomeric to dimeric to tetrameric complexes by slightly altering the reaction conditions and their biological applications.
Collapse
Affiliation(s)
- Anoop Kumar Saini
- Discipline of Chemistry
- Indian Institute of Technology Indore
- Indore 453552
- India
| | - Pratibha Kumari
- Centre for Biosciences and Bio-Medical Engineering
- Indian Institute of Technology Indore
- Indore 453552
- India
| | - Vinay Sharma
- Centre for Biosciences and Bio-Medical Engineering
- Indian Institute of Technology Indore
- Indore 453552
- India
| | - Pradeep Mathur
- Discipline of Chemistry
- Indian Institute of Technology Indore
- Indore 453552
- India
| | - Shaikh M. Mobin
- Discipline of Chemistry
- Indian Institute of Technology Indore
- Indore 453552
- India
- Centre for Biosciences and Bio-Medical Engineering
| |
Collapse
|
14
|
Reactivity of dinuclear copper(II) complexes towards melanoma cells: Correlation with its stability, tyrosinase mimicking and nuclease activity. J Inorg Biochem 2015; 149:49-58. [DOI: 10.1016/j.jinorgbio.2015.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 12/29/2022]
|
15
|
Das M, Nasani R, Saha M, Mobin SM, Mukhopadhyay S. Nickel(ii) complexes with a flexible piperazinyl moiety: studies on DNA and protein binding and catecholase like properties. Dalton Trans 2015; 44:2299-310. [DOI: 10.1039/c4dt02675f] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nickel complexes with a flexible piperazinyl moiety are showing interesting DNA and protein binding properties and catecholase like activity in the boat conformation.
Collapse
Affiliation(s)
- Mriganka Das
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Rajendar Nasani
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Manideepa Saha
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Shaikh M Mobin
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Suman Mukhopadhyay
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| |
Collapse
|
16
|
Donnici CL, Nogueira LJ, Araujo MH, Oliveira SR, Magalhães TFF, Lopes MTP, Araújo e Silva AC, Ferreira AMDC, Martins CVB, de Resende Stoianoff MA. In vitro studies of the activity of dithiocarbamate organoruthenium complexes against clinically relevant fungal pathogens. Molecules 2014; 19:5402-20. [PMID: 24879585 PMCID: PMC6270662 DOI: 10.3390/molecules19045402] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/17/2014] [Accepted: 04/22/2014] [Indexed: 11/16/2022] Open
Abstract
The in vitro antifungal activity of nine dirutheniumpentadithiocarbamate complexes C1-C9 was investigated and assessed for its activity against four different fungal species with clinical interest and related to invasive fungal infections (IFIs), such as Candida spp. [C. albicans (two clinical isolates), C. glabrata, C. krusei, C. parapsolisis, C. tropicalis, C.dubliniensis (six clinical isolates)], Paracoccidioides brasiliensis (seven clinical isolates), Cryptococcus neoformans and Sporothrix schenckii. All synthesized complexes C1-C9 and also the free ligands L1-L9 were submitted to in vitro tests against those fungi and the results are very promising, since some of the obtained MIC (minimal inhibitory concentration) values were very low (from 10-6 mol mL-1 to 10-8 mol mL-1) against all investigated clinically relevant fungal pathogens, except for C. glabrata, that the MIC values are close to the ones obtained for fluconazole, the standard antifungal agent tested. Preliminary structure-activity relations (SAR) might be suggested and a strong influence from steric and lipophilic parameters in the antifungal activity can be noticed. Cytotoxicity assays (IC50) showed that the complexes are not as toxic (IC50 values are much higher-30 to 200 fold-than MIC values). These ruthenium complexes are very promising lead compounds for novel antifungal drug development, especially in IFIs, one of most harmful emerging infection diseases (EIDs).
Collapse
Affiliation(s)
- Claudio L Donnici
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Luciano J Nogueira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Maria Helena Araujo
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Sheila Rodrigues Oliveira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Thais F F Magalhães
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Miriam T P Lopes
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Ana Cândida Araújo e Silva
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Ana Maria da Costa Ferreira
- Instituto de Química da Universidade de São Paulo, Av. Lineu Prestes, 748, CEP 05508-900, São Paulo, SP, Brazil
| | - Cleide V B Martins
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Maria A de Resende Stoianoff
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| |
Collapse
|