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José de Arruda E, Biasotto G, Beppu MM, Monteiro FJ, Granja PL, Rangel M, Leite A, Cabrini I, Santos T, Gonçalves DA, Neitzke Abreu HC. Nano-encapsulated Cu(II) complex as a promising insecticidal for Aedes aegypti (Diptera: Culicidae). Heliyon 2024; 10:e23198. [PMID: 38163248 PMCID: PMC10756974 DOI: 10.1016/j.heliyon.2023.e23198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 11/24/2023] [Accepted: 11/29/2023] [Indexed: 01/03/2024] Open
Abstract
Nanoparticle (NP) research is an area of scientific interest with high potential for application in biomedical, optical, and electronic fields. Due to their relatively large surface area compared to their mass, NPs can be more chemically reactive and change their reactive strength or other properties. NP-based drug delivery systems provide transport and an effective and controlled way to release the drugs. This work aimed to study the solubility and biological activity of nano-encapsulated copper metal complexes for the induction of toxicity and mortality in larvae of Aedes aegypti mosquitoes. After the nano-encapsulated metal complexes were prepared, the efficiency of this incorporation was determined by electron paramagnetic resonance, and toxicity bioassays were performed. The polymeric-based PLGA NPs encapsulating metal complexes exhibited high toxicity and specificity for target organisms (insect vectors, i.e., A. aegypti), with relatively less environmental impact and long-term control of their breeding.
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Affiliation(s)
- Eduardo José de Arruda
- Faculty of Exact Sciences and Technology (FACET), Federal University of Grande Dourados (UFGD), Dourados, MS, Brazil
| | - Glenda Biasotto
- Faculty of Exact Sciences and Technology (FACET), Federal University of Grande Dourados (UFGD), Dourados, MS, Brazil
| | - Marisa Masumi Beppu
- Faculty of Chemical Engineering (FEQ), University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Fernando Jorge Monteiro
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
- Faculty of Engineering of the University of Porto (FEUP), Porto, Portugal
| | - Pedro L. Granja
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
| | - Maria Rangel
- Associated Laboratory for Green Chemistry (LAQV)- Network for Chemistry and Technology (REQUIMTE), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Andreia Leite
- LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Isaías Cabrini
- Faculty of Exact Sciences and Technology (FACET), Federal University of Grande Dourados (UFGD), Dourados, MS, Brazil
- Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Tiago Santos
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
| | - Daniel A. Gonçalves
- Faculty of Exact Sciences and Technology (FACET), Federal University of Grande Dourados (UFGD), Dourados, MS, Brazil
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Functionalization of Rhodamine Platforms with 3-Hydroxy-4-pyridinone Chelating Units and Its Fluorescence Behavior towards Fe(III). MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27051567. [PMID: 35268668 PMCID: PMC8911962 DOI: 10.3390/molecules27051567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/20/2022] [Accepted: 02/23/2022] [Indexed: 11/22/2022]
Abstract
Functionalization of xanthene fluorophores with specific receptor units is an important topic of research aiming for the development of new analytical tools for biological sciences, clinical diagnosis, food and environmental monitoring. Herein, we report a new dihydrorosamine containing two active amino groups, which was functionalized with 3-benzyloxy-1-(3′-carboxypropyl)-2-methyl-4-pyridinone through an amide coupling strategy. Benzylated mono- and di-functionalized dihydrorosamine derivatives (H in position 9 of the xanthene) were obtained, but with modest reaction yields, requiring long and laborious purification procedures. Looking for a more efficient approach, rhodamine 110 was selected to react with the carboxypropyl pyridinone, enabling the isolation of the corresponding mono- and di-functionalized derivatives in amounts that depend on the excess of pyridinone added to the reaction. The structure of all compounds was established by 1H and 13C NMR, MS (ESI) and their absorption and emission properties were evaluated in dichloromethane. The fluorescence behavior of the debenzylated mono-rhodamine 110 derivative in the presence of Fe(III) was studied, making it an interesting fluorogenic dye for future optical sensing applications.
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Coimbra JTS, Brás NF, Fernandes PA, Rangel M, Ramos MJ. A computational study on the redox properties and binding affinities of iron complexes of hydroxypyridinones. J Mol Model 2019; 25:172. [PMID: 31129727 DOI: 10.1007/s00894-019-4037-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 04/15/2019] [Indexed: 12/01/2022]
Abstract
The potential of hydroxypyridinones for in vivo iron sequestration, in both biological and medical contexts, has been extensively discussed in the literature. Different chelators can be designed, with distinct lipophilicities that should alter their cell permeability, distribution, and rates of metabolism. However, for effective iron scavenging in biological systems, the redox potential and binding affinity of iron must fall within a proper range. Our objective was to assess the impact of different hydroxypyridinone chelators in 3:1 iron(III) complexes through comparison of these thermodynamic properties. For that purpose, we employed a cluster-continuum approach using density functional theory, on a dataset of 25 iron complexes. Whenever possible, our results were compared with experimental stability constants (log β) and with electrode potentials. We observed a good qualitative agreement between computed free energies of binding and log β values. In addition, we described which substitutions to the 3-hydroxypyridin-4-one ring should not markedly affect the redox properties and metal ion affinity considering iron. Graphical abstract Iron complexes of hydroxypyridinones.
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Affiliation(s)
- João T S Coimbra
- UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007, Porto, Portugal
| | - Natércia F Brás
- UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007, Porto, Portugal
| | - Pedro A Fernandes
- UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007, Porto, Portugal
| | - Maria Rangel
- LAQV, REQUIMTE, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Maria J Ramos
- UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007, Porto, Portugal.
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4
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Antibacterial activity of naphthyl derived bis-(3-hydroxy-4-pyridinonate) copper(II) complexes against multidrug-resistant bacteria. J Inorg Biochem 2019; 197:110704. [PMID: 31078872 DOI: 10.1016/j.jinorgbio.2019.110704] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/26/2019] [Accepted: 05/01/2019] [Indexed: 01/27/2023]
Abstract
In this work, we report the synthesis and characterization of three novel copper(II) complexes of naphthyl derived 3-hydroxy-4-pyridinone chelators. Their antibacterial activity against several Gram-positive and Gram-negative reference strains and multidrug-resistant clinical isolates was assessed through determination of the minimum inhibitory concentration (MIC). The complex Cu(naph1pp)2 shows the highest antibacterial activity, including against multidrug-resistant isolates, nonetheless, being more active against Gram-positive than Gram-negative bacteria. Cu(naph1pp)2 was further explored in combinatorial tests with ciprofloxacin against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecalis (VRE). The combination of Cu(naph1pp)2 and ciprofloxacin is considered additive, i.e., the effect of the two compounds combined is stronger than that of the individual compounds in the equivalent concentration.
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5
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Novais Â, Moniz T, Rebelo AR, Silva AM, Rangel M, Peixe L. New fluorescent rosamine chelator showing promising antibacterial activity against Gram-positive bacteria. Bioorg Chem 2018; 79:341-349. [DOI: 10.1016/j.bioorg.2018.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 05/08/2018] [Accepted: 05/14/2018] [Indexed: 12/27/2022]
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6
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Coimbra JTS, Brás NF, Fernandes PA, Rangel M, Ramos MJ. Membrane partition of bis-(3-hydroxy-4-pyridinonato) zinc(ii) complexes revealed by molecular dynamics simulations. RSC Adv 2018; 8:27081-27090. [PMID: 35539964 PMCID: PMC9083369 DOI: 10.1039/c8ra03602k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 07/23/2018] [Indexed: 12/24/2022] Open
Abstract
The class of 3-hydroxy-4-pyridinone ligands is widely known and valuable for biomedical and pharmaceutical purposes. Their chelating properties towards biologically-relevant transition metal ions highlight their potential biomedical utility. A set of 3-hydroxy-4-pyridinone Zn(ii) complexes at different concentrations was studied for their ability to interact with lipid phases. We employed umbrella sampling simulations to attain the potential-of-mean force for a set of ligands and one Zn(ii) complex, as these permeated a 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) hydrated bilayer system. In addition, we used conventional molecular dynamics simulations to study the behavior of various Zn(ii) complexes in hydrated bilayer systems. This work discusses: (i) the partition of 3-hydroxy-4-pyridinone ligands to bilayer phases; (ii) self-aggregation in crowded environments of Zn(ii) complexes; and (iii) possible mechanisms for the membrane translocation of Zn(ii) complexes. We observed distinct interactions for the studied complexes, and distinct membrane partition coefficients (Kmem) depending on the considered ligand. The more hydrophobic ligand, 1-hexyl-3-hydroxy-2-methyl-4(1H)-pyridinone, partitioned more favorably to lipid phases (at least two orders of magnitude higher Kmem when compared to the other ligands), and the corresponding Zn(ii) complex was also prone to self-aggregation when an increased concentration of the complex was employed. We also observed that the inclusion of a coordinated water molecule in the parameterization of the Zn(ii) coordination sphere, as proposed in the available crystallographic structure of the complex, decreased the partition coefficient and membrane permeability for the tested complex. The membrane partition of hydroxypyridinones and of zinc complexes explored by molecular dynamics.![]()
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Affiliation(s)
- João T. S. Coimbra
- UCIBIO
- REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
| | - Natércia F. Brás
- UCIBIO
- REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
| | - Pedro A. Fernandes
- UCIBIO
- REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
| | - Maria Rangel
- LAQV
- REQUIMTE
- Instituto de Ciências Biomédicas de Abel Salazar
- Universidade do Porto
- 4050-313 Porto
| | - Maria J. Ramos
- UCIBIO
- REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
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7
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Ferreira S, Leite A, Moniz T, Andrade M, Amaral L, de Castro B, Rangel M. EPR and 51V NMR studies of prospective anti-diabetic bis(3-hydroxy-4-pyridinonato)oxidovanadium(iv) complexes in aqueous solution and liposome suspensions. NEW J CHEM 2018. [DOI: 10.1039/c7nj04678b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
EPR/51V-NMR parallel studies of [VO(3,4-HPO)2] complexes in MOPS buffer and POPC liposome suspensions provide information regarding solvents for oral administration.
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Affiliation(s)
- S. Ferreira
- REQUIMTE-LAQV
- Instituto de Ciências Biomédicas de Abel Salazar
- Universidade do Porto
- 4050-313 Porto
- Portugal
| | - A. Leite
- REQUIMTE-LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - T. Moniz
- REQUIMTE-LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - M. Andrade
- CEMUP
- Centro de Materiais da Universidade do Porto
- 4169-007 Porto
- Portugal
| | - L. Amaral
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - B. de Castro
- REQUIMTE-LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - M. Rangel
- REQUIMTE-LAQV
- Instituto de Ciências Biomédicas de Abel Salazar
- Universidade do Porto
- 4050-313 Porto
- Portugal
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8
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Almeida J, Silva AMN, Rebelo SLH, Cunha-Silva L, Rangel M, de Castro B, Leite A, Silva AMG. Synthesis and coordination studies of 5-(4′-carboxyphenyl)-10,15,20-tris(pentafluorophenyl)porphyrin and its pyrrolidine-fused chlorin derivative. NEW J CHEM 2018. [DOI: 10.1039/c7nj05165d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An efficient strategy was developed to obtain carboxyphenyl porphyrin, chlorins and metal complexes, with potential applications in photonics and biology.
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Affiliation(s)
- José Almeida
- LAQV/REQUIMTE
- Departamento de Química e Bioquímica, Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
- Portugal
| | - André M. N. Silva
- LAQV/REQUIMTE
- Departamento de Química e Bioquímica, Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Susana L. H. Rebelo
- LAQV/REQUIMTE
- Departamento de Química e Bioquímica, Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Luís Cunha-Silva
- LAQV/REQUIMTE
- Departamento de Química e Bioquímica, Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Maria Rangel
- LAQV/REQUIMTE
- Instituto de Ciências Biomédicas de Abel Salazar
- 4099-003 Porto
- Portugal
| | - Baltazar de Castro
- LAQV/REQUIMTE
- Departamento de Química e Bioquímica, Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Andreia Leite
- LAQV/REQUIMTE
- Departamento de Química e Bioquímica, Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
- Portugal
| | - Ana M. G. Silva
- LAQV/REQUIMTE
- Departamento de Química e Bioquímica, Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
- Portugal
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9
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Božić B, Korać J, Stanković DM, Stanić M, Popović-Bijelić A, Bogdanović Pristov J, Spasojević I, Bajčetić M. Mechanisms of redox interactions of bilirubin with copper and the effects of penicillamine. Chem Biol Interact 2017; 278:129-134. [PMID: 29079291 DOI: 10.1016/j.cbi.2017.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 10/10/2017] [Accepted: 10/22/2017] [Indexed: 10/18/2022]
Abstract
Toxic effects of unconjugated bilirubin (BR) in neonatal hyperbilirubinemia have been related to redox and/or coordinate interactions with Cu2+. However, the development and mechanisms of such interactions at physiological pH have not been resolved. This study shows that BR reduces Cu2+ to Cu1+ in 1:1 stoichiometry. Apparently, BR undergoes degradation, i.e. BR and Cu2+ do not form stable complexes. The binding of Cu2+ to inorganic phosphates, liposomal phosphate groups, or to chelating drug penicillamine, impedes redox interactions with BR. Cu1+ undergoes spontaneous oxidation by O2 resulting in hydrogen peroxide accumulation and hydroxyl radical production. In relation to this, copper and BR induced synergistic oxidative/damaging effects on erythrocytes membrane, which were alleviated by penicillamine. The production of reactive oxygen species by BR and copper represents a plausible cause of BR toxic effects and cell damage in hyperbilirubinemia. Further examination of therapeutic potentials of copper chelators in the treatment of severe neonatal hyperbilirubinemia is needed.
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Affiliation(s)
- Bojana Božić
- Department of Pharmacology, Clinical Pharmacology and Toxicology, School of Medicine, University of Belgrade, P.O. Box 38, 11000 Belgrade, Serbia
| | - Jelena Korać
- Life Sciences Department, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia
| | - Dalibor M Stanković
- The Vinča Institute of Nuclear Sciences, University of Belgrade, POB 522, 11001 Belgrade, Serbia; Department of Analytical Chemistry, Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, 11000, Serbia
| | - Marina Stanić
- Life Sciences Department, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia
| | - Ana Popović-Bijelić
- EPR Laboratory, Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11158 Belgrade, Serbia
| | - Jelena Bogdanović Pristov
- Life Sciences Department, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia
| | - Ivan Spasojević
- Life Sciences Department, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia.
| | - Milica Bajčetić
- Department of Pharmacology, Clinical Pharmacology and Toxicology, School of Medicine, University of Belgrade, P.O. Box 38, 11000 Belgrade, Serbia; Clinical Pharmacology Unit, University Children's Hospital, 11000 Belgrade, Serbia
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10
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Leite A, Silva AMG, Coutinho C, Cunha-Silva L, de Castro B, Rangel M. Design of a Water Soluble Fluorescent 3-Hydroxy-4-Pyridinone Ligand Active at Physiological pH Values. J Fluoresc 2016; 26:1773-85. [DOI: 10.1007/s10895-016-1869-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 06/14/2016] [Indexed: 01/08/2023]
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11
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Moniz T, Coimbra JTS, Brás NF, Cunha-Silva L, Ramos MJ, Fernandes PA, de Castro B, Rangel M. Synthesis and structural characterization, by spectroscopic and computational methods, of two fluorescent 3-hydroxy-4-pyridinone chelators bearing sulphorhodamine B and naphthalene. RSC Adv 2016. [DOI: 10.1039/c5ra23217a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A crystal structure of a rhodamine labelled 3-hydroxy-4-pyridinone chelator and prediction of the range of conformations in solution is reported.
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Affiliation(s)
- T. Moniz
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - J. T. S. Coimbra
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - N. F. Brás
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - L. Cunha-Silva
- REQUIMTE-LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - M. J. Ramos
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - P. A. Fernandes
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - B. de Castro
- REQUIMTE-LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 40169-007 Porto
| | - M. Rangel
- REQUIMTE-UCIBIO
- Instituto de Ciências Biomédicas de Abel Salazar
- Universidade do Porto
- 4050-313 Porto
- Portugal
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12
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Moniz T, de Castro B, Rangel M, Ivanova G. NMR study of the interaction of fluorescent 3-hydroxy-4-pyridinone chelators with DMPC liposomes. Phys Chem Chem Phys 2016; 18:5027-33. [DOI: 10.1039/c5cp05273d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The NMR results corroborate the fact that the presence of the ethyl substituents in the amino groups of the xanthene ring and the thiourea link are fundamental to the ability of the chelator to diffuse across the lipid bilayer and consequently relevant for their enhanced biological activity.
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Affiliation(s)
- Tânia Moniz
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
| | - Baltazar de Castro
- REQUIMTE-LAVQ
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
| | - Maria Rangel
- REQUIMTE-UCIBIO
- Instituto de Ciências Biomédicas de Abel Salazar
- Universidade do Porto
- Porto
- Portugal
| | - Galya Ivanova
- REQUIMTE-UCIBIO
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
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13
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Mesquita RB, Moniz T, Miranda JL, Gomes V, Silva AM, Rodriguez-Borges J, Rangel AO, Rangel M. Synthesis and characterization of a 3-hydroxy-4-pyridinone chelator functionalized with a polyethylene glycol (PEG) chain aimed at sequential injection determination of iron in natural waters. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.09.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Salsbury LE, Robertson KN, Flewelling AJ, Li H, Geier SJ, Vogels CM, Gray CA, Westcott SA. Anti-mycobacterial activities of copper(II) complexes. Part II. Lipophilic hydroxypyridinones derived from maltol. CAN J CHEM 2015. [DOI: 10.1139/cjc-2014-0426] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Eight lipophilic 3-hydroxy-4-pyridinones have been prepared from a microwave-mediated reaction along with the corresponding copper(II) complexes. All complexes have been obtained elementally pure and X-ray diffraction studies on two of the copper complexes have confirmed the structure of these compounds. Some of these complexes showed a promising degree of anti-mycobacterial activity against Mycobacterium tuberculosis, where activity seemed to vary by substitution at the pyridinone nitrogen atom.
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Affiliation(s)
- Lauren E. Salsbury
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | | | - Andrew J. Flewelling
- Department of Biology, University of New Brunswick, Saint John, NB E2L 4L5, Canada
| | - Hoaxin Li
- Department of Biology, University of New Brunswick, Saint John, NB E2L 4L5, Canada
| | - Stephen J. Geier
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Christopher M. Vogels
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Christopher A. Gray
- Department of Biology, University of New Brunswick, Saint John, NB E2L 4L5, Canada
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - Stephen A. Westcott
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
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