1
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Scattergood PA, Elliott PIP. Prediction and Rationalization of Different Photochemical Behaviors of mer- and fac-Isomers of [Ru(pyridyltriazole) 3] 2. Inorg Chem 2024; 63:17287-17297. [PMID: 39235265 PMCID: PMC11409217 DOI: 10.1021/acs.inorgchem.4c03154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
Facial and meridional isomerism of metal complexes is known to result in fundamental differences in photophysical properties. One may also envisage differences in their photochemical reactivity and therefore predict different outcomes of their light-triggered transformations. The fac- and mer-isomers of the complex [Ru(pytz)3]2+ (fac-1 & mer-1, pytz = 1-benzyl-4-(pyrid-2-yl)-1,2,3-triazole) were separated and isolated. mer-1 undergoes a predicted pytz photodechelation process in acetonitrile to yield trans-[Ru(κ2-pytz)2(κ1-pytz)(NCMe)]2+ (2) whereas unfavorable interligand steric interactions are predicted to, and indeed do prevent comparable photoreactivity for fac-1. Reversible photoisomerization of fac-1 and mer-1 is also observed, however. The differences in photochemical reactivity of the two isomers can be rationalized based on structural programming of the preferential accessibility of particular 3MC excited states due to differences in their interligand steric interactions. Here we present an initial predictive thought experiment, subsequent experimental verification, and computational rationalization of the differences in photochemical reactivity of these two isomeric complexes.
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Affiliation(s)
- Paul A Scattergood
- Department of Physical and Life Sciences & Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, U.K
| | - Paul I P Elliott
- Department of Physical and Life Sciences & Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, U.K
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2
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Varney AM, Smitten KL, Southam HM, Fairbanks SD, Robertson CC, Thomas JA, McLean S. In Vitro and In Vivo Studies on a Mononuclear Ruthenium Complex Reveals It is a Highly Effective, Fast-Acting, Broad-Spectrum Antimicrobial in Physiologically Relevant Conditions. ACS Infect Dis 2024; 10:3346-3357. [PMID: 39106475 PMCID: PMC11406528 DOI: 10.1021/acsinfecdis.4c00447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
The crystal structure of a previously reported antimicrobial RuII complex that targets bacterial DNA is presented. Studies utilizing clinical isolates of Gram-negative bacteria that cause catheter-associated urinary tract infection, (CA)UTI, in media that model urine and plasma reveal that good antimicrobial activity is maintained in all conditions tested. Experiments with a series of Staphylococcus aureus clinical isolates show that, unlike the majority of previously reported RuII-based antimicrobial leads, the compound retains its potent activity even in MRSA strains. Furthermore, experiments using bacteria in early exponential growth and at different pHs reveal that the compound also retains its activity across a range of conditions that are relevant to those encountered in clinical settings. Combinatorial studies involving cotreatment with conventional antibiotics or a previously reported analogous dinuclear RuII complex showed no antagonistic effects. In fact, although all combinations show distinct additive antibacterial activity, in one case, this effect approaches synergy. It was found that the Galleria Mellonella model organism infected with a multidrug resistant strain of the ESKAPE pathogen Acinetobacter baumannii could be successfully treated and totally cleared within 48 h after a single dose of the lead complex with no detectable deleterious effect to the host.
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Affiliation(s)
- Adam M Varney
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, U.K
- Medical Technologies Innovation Facility (MTIF), Clifton Lane, Nottingham NG11 8NS, U.K
| | - Kirsty L Smitten
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
- School of Bioscience, The University of Sheffield, Western Bank, Sheffield S10 2TN, U.K
| | - Hannah M Southam
- School of Bioscience, The University of Sheffield, Western Bank, Sheffield S10 2TN, U.K
| | - Simon D Fairbanks
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
| | - Craig C Robertson
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
| | - Jim A Thomas
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
| | - Samantha McLean
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, U.K
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3
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Bugnon Q, Melendez C, Desiatkina O, Fayolles de Chaptes L, Holzer I, Păunescu E, Hilty M, Furrer J. In vitro antibacterial activity of dinuclear thiolato-bridged ruthenium(II)-arene compounds. Microbiol Spectr 2023; 11:e0095423. [PMID: 37815336 PMCID: PMC10714934 DOI: 10.1128/spectrum.00954-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 08/28/2023] [Indexed: 10/11/2023] Open
Abstract
IMPORTANCE The in vitro assessment of diruthenium(II)-arene compounds against Escherichia coli, Streptococcus pneumoniae, and Staphylococcus aureus showed a significant antibacterial activity of some compounds against S. pneumoniae, with minimum inhibitory concentration (MIC) values ranging from 1.3 to 2.6 µM, and a medium activity against E. coli, with MIC of 25 µM. The nature of the substituents anchored on the bridging thiols and the compounds molecular weight appear to significantly influence the antibacterial activity. Fluorescence microscopy showed that these ruthenium compounds enter the bacteria and do not accumulate in the cell wall of gram-positive bacteria. These diruthenium(II)-arene compounds exhibit promising activity against S. aureus and S. pneumoniae and deserve to be considered for further studies, especially the compounds bearing larger benzo-fused lactam substituents.
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Affiliation(s)
- Quentin Bugnon
- Department of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
- Department of Chemistry, Biochemistry and Pharmaceuticals Sciences, University of Bern, Bern, Switzerland
| | - Camilo Melendez
- Department of Chemistry, Biochemistry and Pharmaceuticals Sciences, University of Bern, Bern, Switzerland
| | - Oksana Desiatkina
- Department of Chemistry, Biochemistry and Pharmaceuticals Sciences, University of Bern, Bern, Switzerland
| | - Louis Fayolles de Chaptes
- Department of Chemistry, Biochemistry and Pharmaceuticals Sciences, University of Bern, Bern, Switzerland
| | - Isabelle Holzer
- Department of Chemistry, Biochemistry and Pharmaceuticals Sciences, University of Bern, Bern, Switzerland
| | - Emilia Păunescu
- Department of Chemistry, Biochemistry and Pharmaceuticals Sciences, University of Bern, Bern, Switzerland
| | - Markus Hilty
- Department of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Julien Furrer
- Department of Chemistry, Biochemistry and Pharmaceuticals Sciences, University of Bern, Bern, Switzerland
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4
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Sherafati A, Moradi S, Mahdavi M. Efficient synthesis of 3-alkyl-2-(-1H-1,2,3-triazolyl)methyl)thio)-2,3-dihydroquinazolin-4(1H)-one derivative via multistep synthesis approach by novel Cu@Py-Oxa@SPION catalyst. BMC Chem 2023; 17:154. [PMID: 37964295 PMCID: PMC10647046 DOI: 10.1186/s13065-023-01072-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 10/30/2023] [Indexed: 11/16/2023] Open
Abstract
In this pared, an efficient method is introduced for the synthesis of 3-alkyl-2-(((4-(2-oxopropyl)-1H-1,2,3-triazol-1-yl)alkyl)thio)-2,3-dihydroquinazolin-4(1H)-one derivatives. These novel products have both 1,2,3-triazole and quinazolinone in their structures. For the synthesis of these products, a novel catalyst is designed, synthesized, and characterized by the immobilization of copper onto modified magnetic iron oxide. The catalyst (denoted: Cu@Py-Oxa@SPION) was characterized by several characterization techniques. In this regard, 16 3-alkyl-2-(((4-(2-oxopropyl)-1H-1,2,3-triazol-1-yl)alkyl)thio)-2,3-dihydroquinazolin-4(1H)-one derivatives were synthesized in high isolated yields (77-86%). As an advantage, the catalyst is highly recoverable and its activity has not decreased after 7 sequential runs. The method is very efficient for the synthesis of the products in high isolated yields under mild reaction conditions in a green solvent. The scope of the method is broad and several examples were successfully synthesized using starting materials with different functional groups.
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Affiliation(s)
- Alireza Sherafati
- Department of Chemistry Tehran North Branch, Islamic Azad University, Tehran, Iran
| | - Shahram Moradi
- Department of Chemistry Tehran North Branch, Islamic Azad University, Tehran, Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Centre, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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5
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Todorov L, Kostova I. 1,2,3-Triazoles and their metal chelates with antimicrobial activity. Front Chem 2023; 11:1247805. [PMID: 37638102 PMCID: PMC10448507 DOI: 10.3389/fchem.2023.1247805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 07/31/2023] [Indexed: 08/29/2023] Open
Abstract
The emergence of drug-resistant bacterial and fungal pathogens has highlighted the urgent need of innovative antimicrobial therapeutics. Transition metal complexes with biologically active ligands (coumarins, terpyridines, triazoles, uracils, etc.) have long been investigated for antimicrobial activity. 1,2,3-Triazoles and their molecular derivatives are well known for a plethora of physiological activities, including antibacterial and antifungal. The aim of the present mini-review is to inform the reader about research conducted on potential antimicrobial 1,2,3-triazole complexes with transition metals. What the authors find surprising is how little such research and experimentation has actually been performed and reported in scientific literature. The goal is to highlight research efforts up to now and impress upon the reader the vast perspectives for novel, effective medicinal substances hidden in this yet unexplored field.
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Affiliation(s)
- Lozan Todorov
- Department of Chemistry, Faculty of Pharmacy, Medical University—Sofia, Sofia, Bulgaria
| | - Irena Kostova
- Department of Chemistry, Faculty of Pharmacy, Medical University—Sofia, Sofia, Bulgaria
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6
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O’Shaughnessy M, Sheils O, Baird AM. The Lung Microbiome in COPD and Lung Cancer: Exploring the Potential of Metal-Based Drugs. Int J Mol Sci 2023; 24:12296. [PMID: 37569672 PMCID: PMC10419288 DOI: 10.3390/ijms241512296] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/28/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) and lung cancer 17 are two of the most prevalent and debilitating respiratory diseases worldwide, both associated with high morbidity and mortality rates. As major global health concerns, they impose a substantial burden on patients, healthcare systems, and society at large. Despite their distinct aetiologies, lung cancer and COPD share common risk factors, clinical features, and pathological pathways, which have spurred increasing research interest in their co-occurrence. One area of particular interest is the role of the lung microbiome in the development and progression of these diseases, including the transition from COPD to lung cancer. Exploring novel therapeutic strategies, such as metal-based drugs, offers a potential avenue for targeting the microbiome in these diseases to improve patient outcomes. This review aims to provide an overview of the current understanding of the lung microbiome, with a particular emphasis on COPD and lung cancer, and to discuss the potential of metal-based drugs as a therapeutic strategy for these conditions, specifically concerning targeting the microbiome.
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Affiliation(s)
- Megan O’Shaughnessy
- School of Medicine, Trinity Translational Medicine Institute, Trinity College Dublin, D08 W9RT Dublin, Ireland
| | - Orla Sheils
- School of Medicine, Trinity Translational Medicine Institute, Trinity College Dublin, D08 W9RT Dublin, Ireland
- Department of Histopathology and Morbid Anatomy, Trinity Translational Medicine Institute, St. James’s Hospital, D08 RX0X Dublin, Ireland
| | - Anne-Marie Baird
- School of Medicine, Trinity Translational Medicine Institute, Trinity College Dublin, D08 W9RT Dublin, Ireland
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7
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Jian Y, Peng Y, Zhou W, Xu Y, Li C, Wang X, Zhou Q. Ru(II) Complexes with Enaminone Structures for Rapid Sterilization of Staphylococcus aureus and MRSA with Little Accumulation of Drug Resistance. ChemMedChem 2023; 18:e202300065. [PMID: 36751034 DOI: 10.1002/cmdc.202300065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/09/2023]
Abstract
Drug-resistant bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA), pose a serious threat to human life. Therefore, there is urgent need to develop antibiotics with new chemical structures and antibacterial mechanisms, especially those that elicit little drug resistance after long-term use. Herein we synthesized three novel ruthenium complexes (Ru1-Ru3) containing the enaminone structures for the first time. At a concentration of 5 μM, Ru1-Ru3 can lead to a CFU reduction of about 5 log units towards S. aureus and MRSA. Interestingly, Ru3 displayed rapid bactericidal effects and could decrease the CFU numbers of both pathogens by 5 log units within 40 min. The control compounds (Ru4 and Ru5) without the enaminone structures displayed very poor antibacterial activity under the same conditions. Moreover, S. aureus did not show apparent drug resistance towards Ru3 after 20 passages incubation with a sublethal concentration. These results highlight the critical role of enaminone structures for antibacterial applications.
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Affiliation(s)
- Yao Jian
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Yatong Peng
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Wanpeng Zhou
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Yunli Xu
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Chao Li
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Xuesong Wang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Qianxiong Zhou
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China
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8
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Antimicrobial Activity of Rhenium Di- and Tricarbonyl Diimine Complexes: Insights on Membrane-Bound S. aureus Protein Binding. Pharmaceuticals (Basel) 2022; 15:ph15091107. [PMID: 36145328 PMCID: PMC9501577 DOI: 10.3390/ph15091107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/31/2022] [Accepted: 08/31/2022] [Indexed: 11/16/2022] Open
Abstract
Antimicrobial resistance is one of the major human health threats, with significant impacts on the global economy. Antibiotics are becoming increasingly ineffective as drug-resistance spreads, imposing an urgent need for new and innovative antimicrobial agents. Metal complexes are an untapped source of antimicrobial potential. Rhenium complexes, amongst others, are particularly attractive due to their low in vivo toxicity and high antimicrobial activity, but little is known about their targets and mechanism of action. In this study, a series of rhenium di- and tricarbonyl diimine complexes were prepared and evaluated for their antimicrobial potential against eight different microorganisms comprising Gram-negative and -positive bacteria. Our data showed that none of the Re dicarbonyl or neutral tricarbonyl species have either bactericidal or bacteriostatic potential. In order to identify possible targets of the molecules, and thus possibly understand the observed differences in the antimicrobial efficacy of the molecules, we computationally evaluated the binding affinity of active and inactive complexes against structurally characterized membrane-bound S. aureus proteins. The computational analysis indicates two possible major targets for this class of compounds, namely lipoteichoic acids flippase (LtaA) and lipoprotein signal peptidase II (LspA). Our results, consistent with the published in vitro studies, will be useful for the future design of rhenium tricarbonyl diimine-based antibiotics.
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9
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Busto N, Vigueras G, Cutillas N, García B, Ruiz J. Inert cationic iridium(III) complexes with phenanthroline-based ligands: application in antimicrobial inactivation of multidrug-resistant bacterial strains. Dalton Trans 2022; 51:9653-9663. [PMID: 35713595 DOI: 10.1039/d2dt00752e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The antimicrobial activity of a new series of heteroleptic iridium(III) complexes of the type [Ir(C^N)2(N^N)][PF6] (C^N = deprotonated 2-phenylbenzimidazole-κN, κC; N^N = phen (Ir1), dpq (Ir2), dppz (Ir3), dppn (Ir4), and dppz-idzo (Ir5)) was studied towards two Gram positive (vancomycin-resistant Enterococcus faecium and a methicillin-resistant Staphylococcus aureus) and two Gram negative (Acinetobacter baumanii and Pseudomonas aeruginosa) multidrug-resistant bacterial strains of clinical interest. Although the complexes were inactive towards Gram negative bacteria, their effectiveness against Gram positive strains was remarkable, especially for Ir1 and Ir2, the most bactericidal complexes that were even more active (10 times) than the fluoroquinolone antibiotic norfloxacin and displayed no toxicity in human kidney cells (HEK293). Mechanistic studies revealed that the cell wall and membrane of MRSA S. aureus remained intact on treatment with these compounds and that DNA was not their main target. It is important to note that the complexes were able to induce ROS generation, this being the feature key to their antimicrobial activity.
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Affiliation(s)
- Natalia Busto
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, E-09001, Burgos, Spain. .,Departamento de Ciencias de la Salud. Facultad de Ciencias de la Salud. Universidad de Burgos, Hospital Militar, Paseo de los Comendadores, s/n, 09001 Burgos, Spain.
| | - Gloria Vigueras
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain.
| | - Natalia Cutillas
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain.
| | - Begoña García
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, E-09001, Burgos, Spain.
| | - José Ruiz
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain.
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10
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Margetić A, Nikolić S, Grgurić-Šipka S, Vujčić MT. Interaction of organoruthenium(II)-polypyridyl complexes with DNA and BSA. Biometals 2022; 35:813-829. [PMID: 35708875 DOI: 10.1007/s10534-022-00404-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/26/2022] [Indexed: 11/29/2022]
Abstract
The interaction of four arene ruthenium complexes [(η6-p-cymene)Ru(Me2dppz)Cl]PF6 (1) with Me2dppz = 11,12-dimethyldipyrido[3,2-a:2',3'-c]phenazine, [(η6-p-cymene)Ru(aip)Cl]PF6 (2) with aip = 2-(9-anthryl)-1H-imidazo[4,5-f][1,10] phenanthroline), ([(ƞ6-toluene)Ru(ppf)Cl]PF6) (3) and ([(ƞ6-p-cymene)Ru(ppf)Cl]PF6) (4) with ppf = pyrido[2',3':5,6] pyrazino[2,3-f][1,10]phenanthroline with calf thymus DNA were investigated. All of four complexes exhibit DNA-binding activity. UV-Vis spectroscopic studies revealed the intrinsic binding constants of the order 104 M-1 of magnitude, indicating non-intercalative mode. Fluorescence quenching analysis showed that all complexes interfere with intercalator ethidium bromide and minor groove binder Hoechst 33258 by a singular non-intercalative mode with extent that differs by two orders of magnitude. Gel electrophoresis results on DNA cleavage assay demonstrated that all complexes produced conformational changes of supercoiled circular plasmid pUC19 in concentration dependent way. The results of fluorescence titration bovine serum albumin by 1, 2, 3 and 4 showed that all complexes significantly quench tryptophan residues fluorescence through a static quenching mechanism. The antimicrobial activity against both Gram-positive and Gram-negative bacteria analyzed. Complex 1 was most active, even on Escherichia coli was more active than positive control compound.
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Affiliation(s)
- Aleksandra Margetić
- Department of Chemistry, University of Belgrade - Institute of Chemistry, Technology and Metallurgy - National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Serbia
| | - Stefan Nikolić
- Innovative Centre Faculty of Chemistry Belgrade, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Sanja Grgurić-Šipka
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia.
| | - Miroslava T Vujčić
- Department of Chemistry, University of Belgrade - Institute of Chemistry, Technology and Metallurgy - National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Serbia
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11
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Flint KL, Huang DM, Linder-Patton OM, Sumby CJ, Keene FR. Synthesis of Triple‐Stranded Diruthenium(II) Compounds. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kate L. Flint
- The University of Adelaide Chemistry 5005 Adelaide AUSTRALIA
| | - David M. Huang
- The University of Adelaide Chemistry 5005 Adelaide AUSTRALIA
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12
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Laffafchi F, Tajbakhsh M, Sarrafi Y, Maleki B, Ghani M. Cu-Modified Magnetic Creatine as an Efficient Catalyst for Regioselective Preparation of 1,2,3-Triazoles Derivatives. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2070224] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Farin Laffafchi
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Mahmood Tajbakhsh
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Yaghoub Sarrafi
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Behrooz Maleki
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Milad Ghani
- Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
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13
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Ahmed M, Ward S, McCann M, Kavanagh K, Heaney F, Devereux M, Twamley B, Rooney D. Synthesis and characterisation of phenanthroline-oxazine ligands and their Ag(I), Mn(II) and Cu(II) complexes and their evaluation as antibacterial agents. Biometals 2022; 35:173-185. [PMID: 35037171 DOI: 10.1007/s10534-021-00358-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/03/2021] [Indexed: 11/02/2022]
Abstract
A series of phenanthroline-oxazine ligands were formed by a cyclisation reaction between L-tyrosine amino acid esters and 1,10-phenanthroline-5,6-dione (phendione). The methyl derivative of the phenanthroline-oxazine ligand 1 was complexed with Ag(I), Mn(II) and Cu(II) to form [Ag(1)2]ClO4, [Mn(1)3](ClO4)2 and [Cu(1)3](ClO4)2. The activity of these metal complexes was tested against the bacteria Escherichia coli and Staphylococcus aureus. Each of the metal complexes was more active than 1 against S. aureus and the Mn(II) and Cu(II) complexes also showed greater activity than 1 towards E. coli. The effect of increasing the length of the alkyl moiety on the phenanthroline-oxazine ligands and their corresponding tris homoleptic Cu(II) complexes was investigated. In all cases both the ligands and their complexes were more active against Gram-positive S. aureus than against Gram-negative E. coli. Differences in the lipophilicity of the ligands and their corresponding Cu(II) complexes did alter the antibacterial activity, with the hexyl and octyl derivatives and their complexes showing the greatest activity and comparing well with clinically used antibiotics. The most active Cu(II) complexes and their respective ligands were also active against Methicillin-resistant S. aureus (MRSA). In vivo toxicity studies, conducted using the Galleria mellonella model, showed that all of the compounds were well tolerated by the insect larvae.
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Affiliation(s)
- Muhib Ahmed
- Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, Ireland.,Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Sinead Ward
- Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, Ireland.,Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Malachy McCann
- Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Kevin Kavanagh
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland.,Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Frances Heaney
- Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, Ireland.,Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Michael Devereux
- The Centre for Biomimetic & Therapeutic Research, Focas Research Institute, Technological University Dublin, City Campus, Camden Row, Dublin 8, Ireland
| | - Brendan Twamley
- School of Chemistry, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
| | - Denise Rooney
- Department of Chemistry, Maynooth University, Maynooth, Co. Kildare, Ireland. .,Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland.
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14
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Marchetti F, Pettinari R, Verdicchio F, Tombesi A, Scuri S, Xhafa S, Olivieri L, Pettinari C, Choquesillo-Lazarte D, García-García A, Rodríguez Diéguez A, Galindo A. Role of hydrazone substituents in determining the nuclearity and antibacterial activity of Zn(II) complexes with pyrazolone-based hydrazones. Dalton Trans 2022; 51:14165-14181. [DOI: 10.1039/d2dt02430f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrazones and their metal derivatives are very important compounds in medicinal chemistry due to their reported variety of biological activities, such as antibacterial, antifungal and anticancer action. Five hydrazone-pyrazolone ligands...
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15
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Ferraro V, Sole R, Bortoluzzi M, Beghetto V, Castro J. Tris
‐isocyanide copper(I) complex enabling copper azide‐alkyne cycloaddition in neat conditions. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Valentina Ferraro
- Dipartimento di Scienze Molecolari e Nanosistemi Università Ca' Foscari Venice Italy
| | - Roberto Sole
- Dipartimento di Scienze Molecolari e Nanosistemi Università Ca' Foscari Venice Italy
| | - Marco Bortoluzzi
- Dipartimento di Scienze Molecolari e Nanosistemi Università Ca' Foscari Venice Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) Bari Italy
| | - Valentina Beghetto
- Dipartimento di Scienze Molecolari e Nanosistemi Università Ca' Foscari Venice Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) Bari Italy
- Crossing srl Treviso Italy
| | - Jesús Castro
- Departamento de Química Inorgánica Universidade de Vigo, Facultade de Química, Edificio de Ciencias Experimentais Vigo Spain
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16
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Munteanu AC, Uivarosi V. Ruthenium Complexes in the Fight against Pathogenic Microorganisms. An Extensive Review. Pharmaceutics 2021; 13:874. [PMID: 34199283 PMCID: PMC8232020 DOI: 10.3390/pharmaceutics13060874] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 12/13/2022] Open
Abstract
The widespread use of antibiotics has resulted in the emergence of drug-resistant populations of microorganisms. Clearly, one can see the need to develop new, more effective, antimicrobial agents that go beyond the explored 'chemical space'. In this regard, their unique modes of action (e.g., reactive oxygen species (ROS) generation, redox activation, ligand exchange, depletion of substrates involved in vital cellular processes) render metal complexes as promising drug candidates. Several Ru (II/III) complexes have been included in, or are currently undergoing, clinical trials as anticancer agents. Based on the in-depth knowledge of their chemical properties and biological behavior, the interest in developing new ruthenium compounds as antibiotic, antifungal, antiparasitic, or antiviral drugs has risen. This review will discuss the advantages and disadvantages of Ru (II/III) frameworks as antimicrobial agents. Some aspects regarding the relationship between their chemical structure and mechanism of action, cellular localization, and/or metabolism of the ruthenium complexes in bacterial and eukaryotic cells are discussed as well. Regarding the antiviral activity, in light of current events related to the Covid-19 pandemic, the Ru (II/III) compounds used against SARS-CoV-2 (e.g., BOLD-100) are also reviewed herein.
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Affiliation(s)
- Alexandra-Cristina Munteanu
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 020956 Bucharest, Romania
| | - Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, “Carol Davila” University of Medicine and Pharmacy, 020956 Bucharest, Romania
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17
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Morais PAB, Francisco CS, de Paula H, Ribeiro R, Eloy MA, Javarini CL, Neto ÁC, Júnior VL. Semisynthetic Triazoles as an Approach in the Discovery of Novel Lead Compounds. CURR ORG CHEM 2021. [DOI: 10.2174/1385272825666210126100227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Historically, medicinal chemistry has been concerned with the approach of organic
chemistry for new drug synthesis. Considering the fruitful collections of new molecular entities,
the dedicated efforts for medicinal chemistry are rewarding. Planning and search for new
and applicable pharmacologic therapies involve the altruistic nature of the scientists. Since
the 19th century, notoriously applying isolated and characterized plant-derived compounds in
modern drug discovery and various stages of clinical development highlight its viability and
significance. Natural products influence a broad range of biological processes, covering transcription,
translation, and post-translational modification, being effective modulators of most
basic cellular processes. The research of new chemical entities through “click chemistry”
continuously opens up a map for the remarkable exploration of chemical space towards leading
natural products optimization by structure-activity relationship. Finally, in this review, we expect to gather a
broad knowledge involving triazolic natural product derivatives, synthetic routes, structures, and their biological activities.
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Affiliation(s)
- Pedro Alves Bezerra Morais
- Centro de Ciencias Exatas, Naturais e da Saude, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Carla Santana Francisco
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
| | - Heberth de Paula
- Centro de Ciencias Exatas, Naturais e da Saude, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Rayssa Ribeiro
- Programa de Pos- Graduacao em Agroquimica, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Mariana Alves Eloy
- Programa de Pos- Graduacao em Agroquimica, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Clara Lirian Javarini
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
| | - Álvaro Cunha Neto
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
| | - Valdemar Lacerda Júnior
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
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18
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O'Reilly C, Blasco S, Parekh B, Collins H, Cooke G, Gunnlaugsson T, Byrne JP. Ruthenium-centred btp glycoclusters as inhibitors for Pseudomonas aeruginosa biofilm formation. RSC Adv 2021; 11:16318-16325. [PMID: 35479152 PMCID: PMC9030604 DOI: 10.1039/d0ra05107a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 04/26/2021] [Indexed: 11/21/2022] Open
Abstract
Carbohydrate-decorated clusters (glycoclusters) centred on a Ru(ii) ion were synthesised and tested for their activity against Pseudomonas aeruginosa biofilm formation. These clusters were designed by conjugating a range of carbohydrate motifs (galactose, glucose, mannose and lactose, as well as galactose with a triethylene glycol spacer) to a btp (2,6-bis(1,2,3-triazol-4-yl)pyridine) scaffold. This scaffold, which possesses a C2 symmetry, is an excellent ligand for d-metal ions, and thus the formation of the Ru(ii)-centred glycoclusters 7 and 8Gal was achieved from 5 and 6Gal; each possessing four deprotected carbohydrates. Glycocluster 8Gal, which has a flexible spacer between the btp and galactose moieties, showed significant inhibition of P. aeruginosa bacterial biofilm formation. By contrast, glycocluster 7, which lacked the flexible linker, didn't show significant antimicrobial effects and neither does the ligand 6Gal alone. These results are proposed to arise from carbohydrate–lectin interactions with LecA, which are possible for the flexible metal-centred multivalent glycocluster. Metal-centred glycoclusters present a structurally versatile class of antimicrobial agent for P. aeruginosa, of which this is, to the best of our knowledge, the first example. Ruthenium-centred glycoclusters based on carbohydrate-functionalised bis(triazolyl)pyridine ligands show Pseudomonas aeruginosa biofilm inhibition, with activity that is dependent on ligand structure.![]()
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Affiliation(s)
- Ciaran O'Reilly
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin Ireland.,School of Medicine, University College Dublin Belfield Dublin 4 Ireland
| | - Salvador Blasco
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin Ireland
| | - Bina Parekh
- School of Medicine, University College Dublin Belfield Dublin 4 Ireland
| | - Helen Collins
- Department of Applied Science, Tallaght Campus, Technological University Dublin Ireland
| | - Gordon Cooke
- School of Medicine, University College Dublin Belfield Dublin 4 Ireland.,Department of Applied Science, Tallaght Campus, Technological University Dublin Ireland
| | | | - Joseph P Byrne
- School of Chemistry, National University of Ireland Galway University Road Galway Ireland
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19
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Qin Q, Xu G, Liu Y, Ma J. Resorcin[4]arene‐based Cu(I) binuclear and mononuclear complexes as efficient catalysts for azide‐alkyne cycloaddition reactions. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qian Qin
- Key Lab of Polyoxometalate Science, Department of Chemistry Northeast Normal University Changchun China
| | - Guo‐Hai Xu
- Key Laboratory of Jiangxi University for Functional Materials Chemistry, School of Chemistry and Chemical Engineering Gannan Normal University Ganzhou China
| | - Ying‐Ying Liu
- Key Lab of Polyoxometalate Science, Department of Chemistry Northeast Normal University Changchun China
| | - Jian‐Fang Ma
- Key Lab of Polyoxometalate Science, Department of Chemistry Northeast Normal University Changchun China
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20
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Ghosh S, Amariei G, Mosquera MEG, Rosal R. Polymeric ruthenium precursor as a photoactivated antimicrobial agent. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123788. [PMID: 33254797 DOI: 10.1016/j.jhazmat.2020.123788] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/29/2020] [Accepted: 08/19/2020] [Indexed: 06/12/2023]
Abstract
Ruthenium coordination compounds have demonstrated a promising anticancer and antibacterial activity, but their poor water solubility and low stability under physiological conditions may limit their therapeutic applications. Physical encapsulation or covalent conjugation with polymers may overcome these drawbacks, but generally involve multistep reactions and purification processes. In this work, the antibacterial activity of the polymeric precursor dicarbonyldichlororuthenium (II) [Ru(CO)2Cl2]n has been studied against Escherichia coli and Staphylococcus aureus. This Ru-carbonyl precursor shows minimum inhibitory concentration at nanogram per millilitre, which renders it a novel antimicrobial polymer without any organic ligands. Besides, [Ru(CO)2Cl2]n antimicrobial activity is markedly boosted under photoirradiation, which can be ascribed to the enhanced generation of reactive oxygen species under UV irradiation. [Ru(CO)2Cl2]n has been able to inhibit bacterial growth via the disruption of bacterial membranes and triggering upregulation of stress responses as shown in microscopic measurements. The activity of polymeric ruthenium as an antibacterial material is significant even at 6.6 ng/mL while remaining biocompatible to the mammalian cells at much higher concentrations. This study proves that this simple precursor, [Ru(CO)2Cl2]n, can be used as an antimicrobial compound with high activity and a low toxicity profile in the context of need for new antimicrobial agents to fight bacterial infections.
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Affiliation(s)
- Srabanti Ghosh
- Department of Organic and Inorganic Chemistry, Instituto de Investigación en Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, 28805, Alcalá de Henares, Madrid, Spain.
| | - Georgiana Amariei
- Department of Chemical Engineering, Universidad de Alcalá, Campus Universitario, 28805, Alcalá de Henares, Madrid, Spain
| | - Marta E G Mosquera
- Department of Organic and Inorganic Chemistry, Instituto de Investigación en Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, 28805, Alcalá de Henares, Madrid, Spain.
| | - Roberto Rosal
- Department of Chemical Engineering, Universidad de Alcalá, Campus Universitario, 28805, Alcalá de Henares, Madrid, Spain
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21
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Hassan AU, Sumrra SH, Zafar MN, Nazar MF, Mughal EU, Zafar MN, Iqbal M. New organosulfur metallic compounds as potent drugs: synthesis, molecular modeling, spectral, antimicrobial, drug likeness and DFT analysis. Mol Divers 2021; 26:51-72. [PMID: 33415545 DOI: 10.1007/s11030-020-10157-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/17/2020] [Indexed: 11/28/2022]
Abstract
During the present investigation, two new sulfonamide-based Schiff base ligands, 4-{[(2-hydroxy-3-methoxyphenyl)methylidene]amino}-N-(1,3-thiazol-2-yl)benzene-1-sulfonamide (L1) and 4-{[1-(2-hydroxyphenyl)ethylidene]amino}-N-(1,3-thiazol-2-yl)benzene-1-sulfonamide (L2), have been synthesized and coordinated with the transition metals (V, Fe, Co, Ni, Cu and Zn). The ligands were characterized by their physical (color, melting point, yield and solubility), spectral (UV-Vis, FT-IR, LC-MS, 1H NMR and 13C NMR) and elemental data. The structures of the metal complexes (1)-(12) were evaluated through their physical (magnetic and conductance), spectral (UV-Vis, FT-IR and LC-MS) and elemental data. The molecular geometries of ligands and their selected metal complexes were optimized at their ground state energies by B3LYP level of density functional theory (DFT) utilizing 6-311+G (d, p) and LanL2DZ basis set. The first principle study has been discussed for the electronic properties, the molecular electrostatic possibilities as well as the quantum chemical identifiers. An obvious transition of intramolecular charge had been ascertained from the occupied to the unoccupied molecular orbitals. The UV-Vis analysis was performed through time-dependent density functional theory (TD-DFT) by CAM-B3LYP/6-311+G (d, p) function. The in vitro antimicrobial activity was studied against two fungal (Aspergillus niger and Aspergillus flavus) and four bacterial (Staphylococcus aureus, Klebsiela pneumoniae, Escherichia coli and Bacillus subtilis) species. The antioxidant activity was executed as antiradical DPPH scavenging activity (%), total iron reducing power (%) and total phenolic contents (mg GAE g-1). Additionally, enzyme inhibition activity was done against four enzymes (Protease, α-Amylase, Acetylcholinesterase and Butyrylcholinesterase). All the synthetic products exhibited significant bioactivity which were found to enhance upon chelation due to phenomenon of charge transfer from metal to ligand.
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Affiliation(s)
- Abrar Ul Hassan
- Department of Chemistry, University of Gujrat, Gujrat, 50700, Pakistan
| | | | | | - Muhammad Faizan Nazar
- Department of Chemistry, University of Gujrat, Gujrat, 50700, Pakistan.,Department of Chemistry, Division of Science and Technology, University of Education, Lahore, Multan Campus, Pakistan
| | | | | | - Mazhar Iqbal
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
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22
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Sumrra SH, Habiba U, Zafar W, Imran M, Chohan ZH. A review on the efficacy and medicinal applications of metal-based triazole derivatives. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1839751] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Umme Habiba
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | - Wardha Zafar
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | - Muhammad Imran
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Zahid Hussain Chohan
- Department of Chemistry, University College of Management and Sciences, Khanewal, Pakistan
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23
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Soliman N, Sol V, Ouk TS, Thomas CM, Gasser G. Encapsulation of a Ru(II) Polypyridyl Complex into Polylactide Nanoparticles for Antimicrobial Photodynamic Therapy. Pharmaceutics 2020; 12:E961. [PMID: 33066200 PMCID: PMC7602071 DOI: 10.3390/pharmaceutics12100961] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/09/2020] [Accepted: 10/09/2020] [Indexed: 01/01/2023] Open
Abstract
Antimicrobial photodynamic therapy (aPDT) also known as photodynamic inactivation (PDI) is a promising strategy to eradicate pathogenic microorganisms such as Gram-positive and Gram-negative bacteria. This therapy relies on the use of a molecule called photosensitizer capable of generating, from molecular oxygen, reactive oxygen species including singlet oxygen under light irradiation to induce bacteria inactivation. Ru(II) polypyridyl complexes can be considered as potential photosensitizers for aPDT/PDI. However, to allow efficient treatment, they must be able to penetrate bacteria. This can be promoted by using nanoparticles. In this work, ruthenium-polylactide (RuPLA) nanoconjugates with different tacticities and molecular weights were prepared from a Ru(II) polypyridyl complex, RuOH. Narrowly-dispersed nanoparticles with high ruthenium loadings (up to 53%) and an intensity-average diameter < 300 nm were obtained by nanoprecipitation, as characterized by dynamic light scattering (DLS). Their phototoxicity effect was evaluated on four bacterial strains (Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Pseudomonas aeruginosa) and compared to the parent compound RuOH. RuOH and the nanoparticles were found to be non-active towards Gram-negative bacterial strains. However, depending on the tacticity and molecular weight of the RuPLA nanoconjugates, differences in photobactericidal activity on Gram-positive bacterial strains have been evidenced whereas RuOH remained non active.
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Affiliation(s)
- Nancy Soliman
- Institut de Recherche de Chimie Paris, CNRS, Chimie ParisTech, PSL University, 75005 Paris, France;
- Laboratory for Inorganic Chemical Biology, Institute of Chemistry for Life and Health Sciences, CNRS, Chimie ParisTech, PSL University, 75005 Paris, France
| | - Vincent Sol
- Laboratoire PEIRENE, Limoges University, EA 7500, 123 Avenue Albert Thomas, 87060 Limoges, France;
| | - Tan-Sothea Ouk
- Laboratoire PEIRENE, Limoges University, EA 7500, 123 Avenue Albert Thomas, 87060 Limoges, France;
| | - Christophe M. Thomas
- Institut de Recherche de Chimie Paris, CNRS, Chimie ParisTech, PSL University, 75005 Paris, France;
| | - Gilles Gasser
- Laboratory for Inorganic Chemical Biology, Institute of Chemistry for Life and Health Sciences, CNRS, Chimie ParisTech, PSL University, 75005 Paris, France
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24
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Smitten KL, Scattergood PA, Kiker C, Thomas JA, Elliott PIP. Triazole-based osmium(ii) complexes displaying red/near-IR luminescence: antimicrobial activity and super-resolution imaging. Chem Sci 2020; 11:8928-8935. [PMID: 34123147 PMCID: PMC8163367 DOI: 10.1039/d0sc03563g] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 08/06/2020] [Indexed: 12/15/2022] Open
Abstract
Cellular uptake, luminescence imaging and antimicrobial activity against clinically relevant methicillin-resistant S. aureus (MRSA) bacteria are reported. The osmium(ii) complexes [Os(N^N)3]2+ (N^N = 1-benzyl-4-(pyrid-2-yl)-1,2,3-triazole (1 2+); 1-benzyl-4-(pyrimidin-2-yl)-1,2,3-triazole (2 2+); 1-benzyl-4-(pyrazin-2-yl)-1,2,3-triazole (3 2+)) were prepared and isolated as the chloride salts of their meridional and facial isomers. The complexes display prominent spin-forbidden ground state to triplet metal-to-ligand charge transfer (3MLCT) state absorption bands enabling excitation as low as 600 nm for fac/mer-3 2+ and observation of emission in aqueous solution in the deep-red/near-IR regions of the spectrum. Cellular uptake studies within MRSA cells show antimicrobial activity for 1 2+ and 2 2+ with greater toxicity for the meridional isomers in each case and mer-1 2+ showing the greatest potency (32 μg mL-1 in defined minimal media). Super-resolution imaging experiments demonstrate binding of mer- and fac-1 2+ to bacterial DNA with high Pearson's colocalisation coefficients (up to 0.95 using DAPI). Phototoxicity studies showed the complexes exhibited a higher antimicrobial activity upon irradiation with light.
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Affiliation(s)
- Kirsty L Smitten
- Department of Chemistry, University of Sheffield Brook Hill Sheffield S3 7HF UK
| | - Paul A Scattergood
- Department of Chemistry & Centre for Functional Materials, University of Huddersfield Queensgate Huddersfield HD1 3DH UK
| | - Charlotte Kiker
- Department of Chemistry, University of Sheffield Brook Hill Sheffield S3 7HF UK
| | - Jim A Thomas
- Department of Chemistry, University of Sheffield Brook Hill Sheffield S3 7HF UK
| | - Paul I P Elliott
- Department of Chemistry & Centre for Functional Materials, University of Huddersfield Queensgate Huddersfield HD1 3DH UK
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25
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1,2,3-Triazole-containing hybrids with potential antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA). Eur J Med Chem 2020; 206:112686. [PMID: 32795773 DOI: 10.1016/j.ejmech.2020.112686] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 01/10/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA), as a classic reason for genuine skin and flimsy tissues diseases, is a worldwide general wellbeing risk and has already tormented humanity for a long history, creating a critical need for the development of new classes of antibacterials. 1,2,3-Triazole moiety, readily interact with diverse enzymes and receptors in organisms through weak bond interaction, is among the most common frameworks present in the bioactive molecules. 1,2,3-Triazole derivatives, especially 1,2,3-triazole-containing hybrids, possess broad-spectrum activity against a panel of clinically important bacteria including drug-resistant pathogens, so rational design of 1,2,3-triazole derivatives may open a door for the opportunities on the development of novel anti-MRSA agents. This review is an endeavour to highlight the current scenario of 1,2,3-triazole-containing hybrids with potential anti-MRSA activity, covering articles published between 2010 and 2020.
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26
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Pantalon Juraj N, Krklec M, Novosel T, Perić B, Vianello R, Raić-Malić S, Kirin SI. Copper(ii) and zinc(ii) complexes of mono- and bis-1,2,3-triazole-substituted heterocyclic ligands. Dalton Trans 2020; 49:9002-9015. [PMID: 32558875 DOI: 10.1039/d0dt01244k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chelating 1,4-disubstituted mono- (8a-8d) and bis-1,2,3-triazole-based (9a-11a) ligands were prepared by regioselective copper(i)-catalysed 1,3-dipolar cycloaddition of terminal alkynes with aromatic azides, together with bioconjugate 13a synthesized by amide coupling of l-phenylalanine methyl ester to 11a. Cu(ii) and Zn(ii) complexes were prepared and single crystal structures were determined for complexes 8aCu, 8dCu, 9cCu and 10cCu, as well as the free ligands 10a and 10c. The in situ prepared Zn(ii) complexes were studied by NMR spectroscopy, while the stoichiometry of the Cu(ii) complexes in solution was determined by UV-Vis titrations and confirmed by the electronic structure DFT calculations at the (SMD)/M05-2X/6-31+G(d)/LanL2DZ+ECP level of theory.
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27
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Emami M, Bikas R, Noshiranzadeh N, Kozakiewicz A, Lis T. Cu(II)-Hydrazide Coordination Compound Supported on Silica Gel as an Efficient and Recyclable Heterogeneous Catalyst for Green Click Synthesis of β-Hydroxy-1,2,3-triazoles in Water. ACS OMEGA 2020; 5:13344-13357. [PMID: 32548521 PMCID: PMC7288712 DOI: 10.1021/acsomega.0c01491] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/12/2020] [Indexed: 05/02/2023]
Abstract
A hydrazone ligand, (E)-6-(2-((2-hydroxynaphthalen-1-yl)methylene)hydrazinyl)nicotinohydrazide (H2L), was synthesized and characterized by spectroscopic methods. The reaction of H2L with CuCl2·2H2O in methanol gave Cu(II) coordination compound, [Cu(HL')(Cl)]·CH3OH (1), which was characterized by elemental analysis and spectroscopic methods (Fourier transform infrared (FT-IR) and UV-vis). The structure of 1 was also determined by single-crystal X-ray analysis. Structural studies confirmed the formation of esteric group during the synthesis of 1. Compound 1 was immobilized on 3-aminopropyltriethoxysilane (APTS)-functionalized silica gel through the amidification reaction and the obtained heterogeneous coordination compound was utilized as a catalyst for the three-component azide-epoxide-alkyne cycloaddition reaction in water as a green solvent. The structural properties of the heterogeneous catalyst were characterized by a combination of FT-IR, UV-vis, thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS) analyses. The effect of the amount of catalyst and temperature on the cycloaddition reaction was studied, and the obtained 1,2,3-triazoles were characterized by spectroscopic studies and single-crystal X-ray analysis. The catalytic investigations revealed that this catalytic system has high activity in the synthesis of β-hydroxy-1,2,3-triazoles. It was also found that the aromatic and aliphatic substituents on the alkyne and epoxide together with the reaction temperature have considerable effects on the activity and regioselectivity of this catalytic system.
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Affiliation(s)
- Marzieh Emami
- Department
of Chemistry, Faculty of Science, University
of Zanjan, 45371-38791 Zanjan, Iran
| | - Rahman Bikas
- Department
of Chemistry, Faculty of Science, Imam Khomeini
International University, 34148-96818 Qazvin, Iran
- ,
| | - Nader Noshiranzadeh
- Department
of Chemistry, Faculty of Science, University
of Zanjan, 45371-38791 Zanjan, Iran
| | - Anna Kozakiewicz
- Faculty
of Chemistry, Nicolaus Copernicus University
in Toruń, 87-100 Toruń, Poland
| | - Tadeusz Lis
- Faculty
of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland
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28
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Monti N, Zacchini S, Massi M, Hochkoeppler A, Giorgini L, Fiorini V, Stefan A, Stagni S. Antibacterial activity of a new class of tris homoleptic Ru (II)‐complexes with alkyl‐tetrazoles as diimine‐type ligands. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nicola Monti
- Department of Industrial Chemistry “Toso Montanari”University of Bologna Viale Risorgimento 4 Bologna I‐40136 Italy
| | - Stefano Zacchini
- Department of Industrial Chemistry “Toso Montanari”University of Bologna Viale Risorgimento 4 Bologna I‐40136 Italy
| | - Massimiliano Massi
- Curtin Institute for Functional Molecules and Interfaces, School of Molecular and Life ScienceCurtin University Kent Street Bentley WA 6102 Australia
| | - Alejandro Hochkoeppler
- Department of Pharmacy and BiotechnologyUniversity of Bologna Viale Risorgimento 4 Bologna I‐40136 Italy
- CSGI, Department of ChemistryUniversity of Florence Sesto Fiorentino FI I‐50019 Italy
| | - Loris Giorgini
- Department of Industrial Chemistry “Toso Montanari”University of Bologna Viale Risorgimento 4 Bologna I‐40136 Italy
| | - Valentina Fiorini
- Department of Industrial Chemistry “Toso Montanari”University of Bologna Viale Risorgimento 4 Bologna I‐40136 Italy
| | - Alessandra Stefan
- Department of Pharmacy and BiotechnologyUniversity of Bologna Viale Risorgimento 4 Bologna I‐40136 Italy
- CSGI, Department of ChemistryUniversity of Florence Sesto Fiorentino FI I‐50019 Italy
| | - Stefano Stagni
- Department of Industrial Chemistry “Toso Montanari”University of Bologna Viale Risorgimento 4 Bologna I‐40136 Italy
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Use of Cotton Textiles Coated by Ir(III) Tetrazole Complexes within Ceramic Silica Nanophases for Photo-Induced Self-Marker and Antibacterial Application. NANOMATERIALS 2020; 10:nano10061020. [PMID: 32471044 PMCID: PMC7352244 DOI: 10.3390/nano10061020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/18/2020] [Accepted: 05/22/2020] [Indexed: 01/10/2023]
Abstract
This study was aimed at the production and characterization of coated cotton textiles with luminescent ceramic nanophases doped with cationic Ir(III) tetrazole complexes. We confirmed that SiO2 nanoparticles (NPs) do not affect the phosphorescent properties of the complexes that maintain their emission (610 and 490 nm). For the first time we transferred the luminescence feature from nanosol to textile surface, highlighting the advantages of using nanosilica as an encapsulating and stabilizing matrix. The optimized Ir@SiO2 suspensions were homogenously applied onto the cotton surface by dip-pad-dry-cure technique, as proved by the 2p-fluorescence microscope analysis. Once we verified the self-marker properties of the Ir(III) complex, we observed an excellent washing fastness of the coating with a very limited release. SiO2 in the washing water was quantified at maximum around 1.5 wt% and Ir below the inductively coupled plasma optical emission spectrometry (ICP-OES) detection limit of 1 ppm. A Franz cell test was used to evaluate any possible ex-vivo uptake of Ir@SiO2 nanoparticles across human skin tissues, showing that epidermis and dermis stop over 99% of Ir, implying a reduced impact on human health. The light-induced antimicrobial potential of the Ir@SiO2 were assessed toward both Gram(−) and Gram(+) bacteria. The results encouraged further developments of such functional textiles coated by self-markers and antibacterial active nanophases.
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Recent Studies on the Antimicrobial Activity of Transition Metal Complexes of Groups 6–12. CHEMISTRY-SWITZERLAND 2020. [DOI: 10.3390/chemistry2020026] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Antimicrobial resistance is an increasingly serious threat to global public health that requires innovative solutions to counteract new resistance mechanisms emerging and spreading globally in infectious pathogens. Classic organic antibiotics are rapidly exhausting the structural variations available for an effective antimicrobial drug and new compounds emerging from the industrial pharmaceutical pipeline will likely have a short-term and limited impact before the pathogens can adapt. Inorganic and organometallic complexes offer the opportunity to discover and develop new active antimicrobial agents by exploiting their wide range of three-dimensional geometries and virtually infinite design possibilities that can affect their substitution kinetics, charge, lipophilicity, biological targets and modes of action. This review describes recent studies on the antimicrobial activity of transition metal complexes of groups 6–12. It focuses on the effectiveness of the metal complexes in relation to the rich structural chemical variations of the same. The aim is to provide a short vade mecum for the readers interested in the subject that can complement other reviews.
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31
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Crlikova H, Malina J, Novohradsky V, Kostrhunova H, Vasdev RAS, Crowley JD, Kasparkova J, Brabec V. Antiproliferative Activity and Associated DNA Interactions of [Co2L3]6+ Cylinders Derived from Bis(bidentate) 2-Pyridyl-1,2,3-triazole Ligands. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00146] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hana Crlikova
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, CZ-783-71 Olomouc, Czech Republic
| | - Jaroslav Malina
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Vojtech Novohradsky
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Hana Kostrhunova
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Roan A. S. Vasdev
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand
| | - James D. Crowley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand
| | - Jana Kasparkova
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, CZ-783-71 Olomouc, Czech Republic
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Viktor Brabec
- Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic
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32
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Sur VP, Mazumdar A, Kopel P, Mukherjee S, Vítek P, Michalkova H, Vaculovičová M, Moulick A. A Novel Ruthenium Based Coordination Compound Against Pathogenic Bacteria. Int J Mol Sci 2020; 21:E2656. [PMID: 32290291 PMCID: PMC7178087 DOI: 10.3390/ijms21072656] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 12/12/2022] Open
Abstract
The current epidemic of antibiotic-resistant infections urges to develop alternatives to less-effective antibiotics. To assess anti-bacterial potential, a novel coordinate compound (RU-S4) was synthesized using ruthenium-Schiff base-benzimidazole ligand, where ruthenium chloride was used as the central atom. RU-S4 was characterized by scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), and Raman spectroscopy. Antibacterial effect of RU-S4 was studied against Staphylococcus aureus (NCTC 8511), vancomycin-resistant Staphylococcus aureus (VRSA) (CCM 1767), methicillin-resistant Staphylococcus aureus (MRSA) (ST239: SCCmecIIIA), and hospital isolate Staphylococcus epidermidis. The antibacterial activity of RU-S4 was checked by growth curve analysis and the outcome was supported by optical microscopy imaging and fluorescence LIVE/DEAD cell imaging. In vivo (balb/c mice) infection model prepared with VRSA (CCM 1767) and treated with RU-S4. In our experimental conditions, all infected mice were cured. The interaction of coordination compound with bacterial cells were further confirmed by cryo-scanning electron microscope (Cryo-SEM). RU-S4 was completely non-toxic against mammalian cells and in mice and subsequently treated with synthesized RU-S4.
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Affiliation(s)
- Vishma Pratap Sur
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, CZ-613 00 Brno, Czech Republic; (A.M.); (S.M.); (H.M.); (M.V.)
- Central European Institute of Technology, Brno University of Technology, CZ-61200 Brno, Czech Republic
| | - Aninda Mazumdar
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, CZ-613 00 Brno, Czech Republic; (A.M.); (S.M.); (H.M.); (M.V.)
- Central European Institute of Technology, Brno University of Technology, CZ-61200 Brno, Czech Republic
| | - Pavel Kopel
- Department of Inorganic Chemistry, Faculty of Science, Palacky University, CZ-771 46 Olomouc, Czech Republic;
| | - Soumajit Mukherjee
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, CZ-613 00 Brno, Czech Republic; (A.M.); (S.M.); (H.M.); (M.V.)
| | - Petr Vítek
- Global Change Research Institute of the Czech Academy of Sciences, CZ- 603 00 Brno, Czech Republic;
| | - Hana Michalkova
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, CZ-613 00 Brno, Czech Republic; (A.M.); (S.M.); (H.M.); (M.V.)
| | - Markéta Vaculovičová
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, CZ-613 00 Brno, Czech Republic; (A.M.); (S.M.); (H.M.); (M.V.)
- Central European Institute of Technology, Brno University of Technology, CZ-61200 Brno, Czech Republic
| | - Amitava Moulick
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, CZ-613 00 Brno, Czech Republic; (A.M.); (S.M.); (H.M.); (M.V.)
- Central European Institute of Technology, Brno University of Technology, CZ-61200 Brno, Czech Republic
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33
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Photophysical and Biological Properties of Iridium Tetrazolato Complexes Functionalised with Fatty Acid Chains. INORGANICS 2020. [DOI: 10.3390/inorganics8040023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Five cyclometalated Ir(III) tetrazolato complexes functionalised with fatty acid chains (octanoic, palmitic, stearic, palmitoleic, and oleic) have been synthesised. The fatty acids were chosen to evaluate the potential effect of the length and degree of unsaturation on the biological properties of the complexes for use as cellular imaging agents. The complexes were analysed in both organic and aqueous media to determine if the presence and nature of the fatty acid chains had a significant effect on their photophysical properties. The complexes display green–yellow emission in dichloromethane solutions with relatively long excited state decays, within the range 360–393 ns, and quantum yields between 5.4% and 6.7% (from degassed solutions). Temperature-dependent photophysical studies suggest that the emitting excited states of the complexes might be quenched by the thermal population of dark states. In water, the quantum yields drop within the range of 0.5%–2.4%, and the photophysical measurements are influenced by the variable degrees of aggregation. In general, the entire series displayed low cytotoxicity and relatively high photostability, which are favourable attributes in the design of cellular imaging agents. Images of live HeLa cells were obtained for all the complexes, but those functionalised with palmitic and stearic acids had limitations due the lower solubility conferred by the saturated aliphatic chains. The complexes were mainly detected within the endoplasmic reticulum.
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34
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Smitten KL, Fairbanks SD, Robertson CC, Bernardino de la Serna J, Foster SJ, Thomas JA. Ruthenium based antimicrobial theranostics - using nanoscopy to identify therapeutic targets and resistance mechanisms in Staphylococcus aureus. Chem Sci 2020; 11:70-79. [PMID: 32110358 PMCID: PMC7012045 DOI: 10.1039/c9sc04710g] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/28/2019] [Indexed: 12/13/2022] Open
Abstract
In previous studies we reported that specific dinuclear RuII complexes are particularly active against pathogenic Gram-negative bacteria and, unusually for this class of compounds, appeared to display lowered activity against Gram-positive bacteria. With the aim of identifying resistance mechanisms specific to Gram-positive bacteria, the uptake and antimicrobial activity of the lead complex against Staphylococcus aureus SH1000 and other isolates, including MRSA was investigated. This revealed differential, strain specific, sensitivity to the complex. Exploiting the inherent luminescent properties of the RuII complex, super-resolution STED nanoscopy was used to image its initial interaction with S. aureus and confirm its cellular internalization. Membrane damage assays and transmission electron microscopy confirm that the complex disrupts the bacterial membrane structure before internalization, which ultimately results in a small amount of DNA damage. A known resistance mechanism against cationic antimicrobials in Gram-positive bacteria involves increased expression of the mprF gene as this results in an accumulation of positively charged lysyl-phosphatidylglycerol on the outer leaflet of the cytoplasmic membrane that electrostatically repel cationic species. Consistent with this model, it was found that an mprF deficient strain was particularly susceptible to treatment with the lead complex. More detailed co-staining studies also revealed that the complex was more active in S. aureus strains missing, or with altered, wall teichoic acids.
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Affiliation(s)
- Kirsty L Smitten
- Department of Chemistry , University of Sheffield , Sheffield S10 2TN , UK . ;
- The Florey Institute and Department of Molecular Biology and Biotechnology , University of Sheffield , S10 2TN , UK
| | - Simon D Fairbanks
- Department of Chemistry , University of Sheffield , Sheffield S10 2TN , UK . ;
| | - Craig C Robertson
- Department of Chemistry , University of Sheffield , Sheffield S10 2TN , UK . ;
| | - Jorge Bernardino de la Serna
- National Heart and Lung Institute , Faculty of Medicine , Imperial College London , South Kensington Campus , London SW7 2AZ , UK
- Research Complex at Harwell , Rutherford Appleton Laboratory , Central Laser Facility , United Kingdom Research and Innovation , OX11 0FA , UK
| | - Simon J Foster
- The Florey Institute and Department of Molecular Biology and Biotechnology , University of Sheffield , S10 2TN , UK
| | - Jim A Thomas
- Department of Chemistry , University of Sheffield , Sheffield S10 2TN , UK . ;
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35
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Guven N, Sultanova H, Ozer B, Yucel B, Camurlu P. Tuning of electrochromic properties of electrogenerated polythiophenes through Ru(II) complex tethering and backbone derivatization. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135134] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Sun W, Boerhan R, Tian N, Feng Y, Lu J, Wang X, Zhou Q. Fluorination in enhancing photoactivated antibacterial activity of Ru(ii) complexes with photo-labile ligands. RSC Adv 2020; 10:25364-25369. [PMID: 35517482 PMCID: PMC9055273 DOI: 10.1039/d0ra01806f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/29/2020] [Indexed: 12/17/2022] Open
Abstract
Fluorination in the dppz ligand efficiently enhanced the photoactivated antibacterial activity of Ru(ii) complexes with photo-labile ligands against antibiotic-resistant bacteria both under normoxic and hypoxic conditions.
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Affiliation(s)
- Weize Sun
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Rena Boerhan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Na Tian
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Yang Feng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Jian Lu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Xuesong Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Qianxiong Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
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37
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Srivastava P, Shukla M, Kaul G, Chopra S, Patra AK. Rationally designed curcumin based ruthenium(ii) antimicrobials effective against drug-resistant Staphylococcus aureus. Dalton Trans 2019; 48:11822-11828. [PMID: 31215556 DOI: 10.1039/c9dt01650c] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Two new curcumin containing octahedral ruthenium(ii) polypyridyl complexes, viz. [Ru(NN)2(cur)](PF6) [NN = bpy (1), phen (2)], were designed to explore the antimicrobial activity against ESKAPE pathogens, especially with the Gram-positive drug resistant S. aureus. Solid-state structural characterization by single-crystal X-ray crystallography shows the RuII-center in a distorted octahedral {RuN4O2} geometry. The tested compounds showed significant inhibitory activity and high selectivity (MIC = 1 μg mL-1, SI = 80) against a wide variety of methicillin and vancomycin-resistant S. aureus strains. Compound 1 exhibited strong anti-biofilm activity (48% reduction of biofilm) at 10× MIC compared to the other approved drugs. The murine model of Staphylococcus infection significantly reduced the mean bacterial counts when treated with complex 1 compared to vancomycin, demonstrating its antimicrobial potential in vivo.
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Affiliation(s)
- Payal Srivastava
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India.
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38
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Kreofsky NW, Dillenburg MD, Villa EM, Fletcher JT. Ru(II) coordination compounds of N-N bidentate chelators with 1,2,3 triazole and isoquinoline subunits: Synthesis, spectroscopy and antimicrobial properties. Polyhedron 2019; 177. [PMID: 32863525 DOI: 10.1016/j.poly.2019.114259] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Bidentate chelators 1-(1-benzyl-1,2,3-triazol-4-yl)isoquinoline and 3-(1-benzyl-1,2,3-triazol-4-yl)isoquinoline were prepared from benzyl bromide and trimethylsilylethynylisoquinoline precursors using a tandem deprotection/substitution/CuAAC synthetic approach. Each chelator is capable of forming a stable 3:1 Ru(II) coordination compound, which forms as a geometric isomer mixture. These Ru(II) complexes possess unique MLCT absorbance signatures at 450/472 nm (1-isomer) and 367 nm (3-isomer) relative to their constituent chelating units. Minimum inhibitory concentration values as low as 0.4 μM are observed for Ru(II) complexes against representative Gram-positive bacteria Bacillus subtilis and Staphylococcus epidermidis. Comparing the MIC values of these isoquinoline compounds with analogous 2-(1-benzyl-1,2,3-triazol-4-yl)pyridine compounds shows a 2.5- to 40-fold improvement in potency. This study establishes that increased hydrophobicity introduced at the central chelating units of Ru(II) coordination compounds can be a useful means by which to optimize antimicrobial activity that is complimentary to the variation of peripheral substituent identity at the chelator's N1 triazole position.
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Affiliation(s)
- Nicholas W Kreofsky
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
| | - Maxwell D Dillenburg
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
| | - Eric M Villa
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
| | - James T Fletcher
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
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39
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Sole R, Bortoluzzi M, Spannenberg A, Tin S, Beghetto V, de Vries JG. Synthesis, characterization and catalytic activity of novel ruthenium complexes bearing NNN click based ligands. Dalton Trans 2019; 48:13580-13588. [PMID: 31464307 DOI: 10.1039/c9dt01822k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Novel air stable ruthenium(ii) complexes bearing tridentate ligands bis((1-benzyl-1H-1,2,3-triazol-4-yl)methyl)amine (L1), 1-(1-benzyl-1H-1,2,3-triazol-4-yl)-N-(pyridin-2-ylmethyl)methanamine (L2) or 2-(4-phenyl-1H-1,2,3-triazol-1-yl)-N-(pyridin-2-ylmethyl)ethan-1-amine (L3) were synthesised. The nitrogen based ligands were easily prepared by virtue of click chemistry using cheap and commercially available reagents. The ruthenium complexes were obtained by heating the Ru(PPh3)3Cl2 precursor and the tridentate NNN ligand in toluene under reflux for 2 hours, achieving yields of 82-87%. These complexes were fully characterized by means of NMR, FT-IR and high resolution ESI spectroscopy. The crystal structure of one of the complexes was determined. These complexes showed excellent activity and selectivity in the hydrogenation of ketones and aldehydes. DFT calculations show that complex 3 may react through an outer-sphere catalytic cycle rather than via an inner-sphere mechanism.
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Affiliation(s)
- Roberto Sole
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca'Foscari Venezia, Via Torino 155, 30170, Venezia Mestre, Italy.
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40
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Khamespanah F, Maverick AW. Two isomers of [1-benzyl-4-(pyridin-2-yl-κ N)-1 H-1,2,3-triazole-κ N 3]di-chlorido-bis-(dimethyl sulfoxide-κ S)ruthenium(II). Acta Crystallogr E Crystallogr Commun 2019; 75:1108-1111. [PMID: 31417774 PMCID: PMC6690446 DOI: 10.1107/s2056989019008375] [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: 05/08/2019] [Accepted: 06/12/2019] [Indexed: 11/29/2022]
Abstract
The structures of two isomers of the title compound, [RuCl2(C14H12N4)(C2H6OS)2], 2 and 3, are reported. Isomers 2 and 3 are produced by reaction of the pyridyl-triazole ligand 1-benzyl-4-(pyridin-2-yl)-1H-1,2,3-triazole (bpt) (1) with fac-[RuCl2(DMSO-S)3(DMSO-O)]. Reaction in acetone produces ca 95% 2, which is the OC-6-14 isomer, with cis DMSO and trans chlorido ligands, and 5% 3 (the OC-6-32 isomer, with cis DMSO and cis chlorido ligands, and the pyridyl moiety of bpt trans to DMSO). Reaction in refluxing toluene initially forms 2, which slowly isomerizes to 3.
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Affiliation(s)
- Fatemeh Khamespanah
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana, 70803, USA
| | - Andrew W. Maverick
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana, 70803, USA
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41
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Ranieri AM, Caporale C, Fiorini V, Hubbard A, Rigby P, Stagni S, Watkin E, Ogden MI, Hackett MJ, Massi M. Complementary Approaches to Imaging Subcellular Lipid Architectures in Live Bacteria Using Phosphorescent Iridium Complexes and Raman Spectroscopy. Chemistry 2019; 25:10566-10570. [DOI: 10.1002/chem.201902023] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/11/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Anna Maria Ranieri
- Curtin Institute for Functional Molecules and Interfaces, and School of Molecular and Life SciencesCurtin University Bentley 6102 WA Australia
| | - Chiara Caporale
- Curtin Institute for Functional Molecules and Interfaces, and School of Molecular and Life SciencesCurtin University Bentley 6102 WA Australia
| | - Valentina Fiorini
- Department of Industrial Chemistry “Toso Montanari”University of Bologna, viale del Risorgimento4 40136 Bologna Italy
| | - Alysia Hubbard
- Centre for Microscopy, Characterisation and AnalysisThe University of Western Australia Perth 6009 WA Australia
| | - Paul Rigby
- Centre for Microscopy, Characterisation and AnalysisThe University of Western Australia Perth 6009 WA Australia
| | - Stefano Stagni
- Department of Industrial Chemistry “Toso Montanari”University of Bologna, viale del Risorgimento4 40136 Bologna Italy
| | - Elizabeth Watkin
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research InstituteCurtin University Kent Street Bentley 6102 Australia
| | - Mark I. Ogden
- Curtin Institute for Functional Molecules and Interfaces, and School of Molecular and Life SciencesCurtin University Bentley 6102 WA Australia
| | - Mark J. Hackett
- Curtin Institute for Functional Molecules and Interfaces, and School of Molecular and Life SciencesCurtin University Bentley 6102 WA Australia
| | - Massimiliano Massi
- Curtin Institute for Functional Molecules and Interfaces, and School of Molecular and Life SciencesCurtin University Bentley 6102 WA Australia
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Singh J, Park DW, Kim DH, Singh N, Kang SC, Chi KW. Coordination-Driven Self-Assembly of Triazole-Based Apoptosis-Inducible Metallomacrocycles. ACS OMEGA 2019; 4:10810-10817. [PMID: 31460178 PMCID: PMC6649141 DOI: 10.1021/acsomega.9b00093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 06/10/2019] [Indexed: 06/10/2023]
Abstract
Ru(II)-metallomacrocycles containing 4-pyridyl-1,2,3-triazole moiety were realized by coordination-driven self-assembly. All new compounds were characterized by electrospray ionisation mass spectrometry, elemental analysis, and 1H and 13C NMR spectroscopic techniques. The molecular structure of metallomacrocycle 8 was determined by single-crystal X-ray crystallography. The anticancer activities of metallomacrocycles 5-8 were evaluated by cytotoxicity, cell cycle analysis, and related protein expression. Metallomacrocycle 7 showed the highest cytotoxicity in HepG2 human hepatocellular carcinoma cells. In addition, apoptotic HepG2 cells were analyzed when metallomacrocycle 7 was treated. Our results suggest that metallomacrocycle 7 induces liver cancer cell death by increasing apoptosis and cell cycle arrest and that it has potential use as an agent for the treatment of human hepatocellular carcinoma.
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Affiliation(s)
- Jatinder Singh
- Department
of Chemistry, University of Ulsan, Ulsan 44776, Republic of Korea
| | - Dae Won Park
- Department
of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Dong Hwan Kim
- Department
of Chemistry, University of Ulsan, Ulsan 44776, Republic of Korea
| | - Nem Singh
- Department
of Chemistry, University of Ulsan, Ulsan 44776, Republic of Korea
| | - Se Chan Kang
- Department
of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Ki-Whan Chi
- Department
of Chemistry, University of Ulsan, Ulsan 44776, Republic of Korea
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Miller RG, Vázquez-Hernández M, Prochnow P, Bandow JE, Metzler-Nolte N. A CuAAC Click Approach for the Introduction of Bidentate Metal Complexes to a Sulfanilamide-Derived Antibiotic Fragment. Inorg Chem 2019; 58:9404-9413. [PMID: 31246015 DOI: 10.1021/acs.inorgchem.9b01186] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A simple "click-chemistry" approach was employed in order to functionalize the known antibiotic fragment sulfanilamide with a bidentate pyridyl-triazole pocket, which allowed for the synthesis of ruthenium(II) and rhenium(I) carbonyl chloride complexes. Six new complexes were prepared and comprehensively characterized, including five single crystal X-ray structures, photophysical characterization, and testing for antimicrobial activity. Interestingly, functionalization of the pyridine ring with an ortho-hydroxymethyl group resulted in a greater than 100-fold increase in the rate of ligand release in a dimethylsulfoxide solution. Subsequent studies indicated this process could be further accelerated by irradiation with 265 nm light. Structural characterization of four of the complexes indicates that this is the result of a lengthening and weakening of the Re-NPyridine bond (average (Ltri) = 2.19 Å vs LtriOH = 2.25 Å) due to the steric influence of the hydroxymethyl group. The organometallic rhenium(I) pyridyl-triazole functionality maintains its characteristic fluorescent properties despite the presence of the sulfonamide moiety. Two of the compounds showed modest antimicrobial activity against methicillin-resistant Staphylococcus aureus, whereas the structurally similar sulfamethoxazole alone showed no activity under the same conditions.
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Affiliation(s)
- Reece G Miller
- Inorganic Chemistry I - Bioinorganic Chemistry, Faculty of Chemistry and Biochemistry , Ruhr University Bochum , Universitaetsstrasse 150 , D-44801 , Bochum , Germany
| | - Melissa Vázquez-Hernández
- Applied Microbiology, Faculty of Biology and Biotechnology , Ruhr University Bochum , Universitaetsstrasse 150 , 44780 Bochum , Germany
| | - Pascal Prochnow
- Applied Microbiology, Faculty of Biology and Biotechnology , Ruhr University Bochum , Universitaetsstrasse 150 , 44780 Bochum , Germany
| | - Julia E Bandow
- Applied Microbiology, Faculty of Biology and Biotechnology , Ruhr University Bochum , Universitaetsstrasse 150 , 44780 Bochum , Germany
| | - Nils Metzler-Nolte
- Inorganic Chemistry I - Bioinorganic Chemistry, Faculty of Chemistry and Biochemistry , Ruhr University Bochum , Universitaetsstrasse 150 , D-44801 , Bochum , Germany
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44
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Smitten KL, Southam HM, de la Serna JB, Gill MR, Jarman PJ, Smythe CGW, Poole RK, Thomas JA. Using Nanoscopy To Probe the Biological Activity of Antimicrobial Leads That Display Potent Activity against Pathogenic, Multidrug Resistant, Gram-Negative Bacteria. ACS NANO 2019; 13:5133-5146. [PMID: 30964642 DOI: 10.1021/acsnano.8b08440] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Medicinal leads that are also compatible with imaging technologies are attractive, as they facilitate the development of therapeutics through direct mechanistic observations at the molecular level. In this context, the uptake and antimicrobial activities of several luminescent dinuclear RuII complexes against E. coli were assessed and compared to results obtained for another ESKAPE pathogen, the Gram-positive major opportunistic pathogen Enterococcus faecalis, V583. The most promising lead displays potent activity, particularly against the Gram-negative bacteria, and potency is retained in the uropathogenic multidrug resistant EC958 ST131 strain. Exploiting the inherent luminescent properties of this complex, super-resolution STED nanoscopy was used to image its initial localization at/in cellular membranes and its subsequent transfer to the cell poles. Membrane damage assays confirm that the complex disrupts the bacterial membrane structure before internalization. Mammalian cell culture and animal model studies indicate that the complex is not toxic to eukaryotes, even at concentrations that are several orders of magnitude higher than its minimum inhibitory concentration (MIC). Taken together, these results have identified a lead molecular architecture for hard-to-treat, multiresistant, Gram-negative bacteria, which displays activities that are already comparable to optimized natural product-based leads.
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Affiliation(s)
- Kirsty L Smitten
- Department of Chemistry , The University of Sheffield , Western Bank , Sheffield S3 7HF , U.K
| | - Hannah M Southam
- Department of Molecular Biology and Biotechnology , The University of Sheffield , Western Bank , Sheffield S10 2TN , U.K
| | - Jorge Bernardino de la Serna
- Central Laser Facility, Rutherford Appleton Laboratory, Research Complex at Harwell , Science and Technology Facilities Council , Harwell-Oxford , Didcot OX11 0QX , U.K
- Department of Physics , King's College London , London WC2R 2LS , U.K
| | - Martin R Gill
- Department of Chemistry , The University of Sheffield , Western Bank , Sheffield S3 7HF , U.K
| | - Paul J Jarman
- Department of Biomedical Science , The University of Sheffield , Western Bank , Sheffield S10 2TN , U.K
| | - Carl G W Smythe
- Department of Biomedical Science , The University of Sheffield , Western Bank , Sheffield S10 2TN , U.K
| | - Robert K Poole
- Department of Molecular Biology and Biotechnology , The University of Sheffield , Western Bank , Sheffield S10 2TN , U.K
| | - Jim A Thomas
- Department of Chemistry , The University of Sheffield , Western Bank , Sheffield S3 7HF , U.K
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45
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van Hilst QVC, Vasdev RAS, Preston D, Findlay JA, Scottwell SØ, Giles GI, Brooks HJL, Crowley JD. Synthesis, Characterisation and Antimicrobial Studies of some 2,6‐
bis
(1,2,3‐Triazol‐4‐yl)Pyridine Ruthenium(II) “Click” Complexes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900088] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Quinn V. C. van Hilst
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Roan A. S. Vasdev
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pharmacology and ToxicologyUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Dan Preston
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pharmacology and ToxicologyUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - James A. Findlay
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Synøve Ø. Scottwell
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
| | - Gregory I. Giles
- Department of Pharmacology and ToxicologyUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
| | - Heather J. L. Brooks
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
| | - James D. Crowley
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
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46
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Sun B, Sundaraneedi MK, Southam HM, Poole RK, Musgrave IF, Keene FR, Collins JG. Synthesis and biological properties of tetranuclear ruthenium complexes containing the bis[4(4′-methyl-2,2′-bipyridyl)]-1,7-heptane ligand. Dalton Trans 2019; 48:14505-14515. [DOI: 10.1039/c9dt03221e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The non-linear polypyridylruthenium(ii) complex (Rubb7-TNL) exhibited good antimicrobial activity, but surprisingly was also highly active against cancer cells. The results suggestRubb7-TNLmay have potential as a new anticancer agent.
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Affiliation(s)
- Biyun Sun
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
- Australia
| | - Madhu K. Sundaraneedi
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
- Australia
| | - Hannah M. Southam
- Department of Molecular Biology and Biotechnology
- The University of Sheffield
- Sheffield
- UK
| | - Robert K. Poole
- Department of Molecular Biology and Biotechnology
- The University of Sheffield
- Sheffield
- UK
| | - Ian F. Musgrave
- Discipline of Pharmacology
- Adelaide Medical School
- University of Adelaide
- Adelaide
- Australia
| | - F. Richard Keene
- School of Physical Sciences
- University of Adelaide
- Adelaide
- Australia
- Australian Institute of Tropical Health & Medicine/Centre for Molecular Therapeutics
| | - J. Grant Collins
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
- Australia
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47
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Sun B, Musgrave IF, Day AI, Heimann K, Keene FR, Collins JG. Eukaryotic Cell Toxicity and HSA Binding of [Ru(Me 4phen)(bb 7)] 2+ and the Effect of Encapsulation in Cucurbit[10]uril. Front Chem 2018; 6:595. [PMID: 30560120 PMCID: PMC6287197 DOI: 10.3389/fchem.2018.00595] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 11/14/2018] [Indexed: 12/12/2022] Open
Abstract
The toxicity (IC50) of a series of mononuclear ruthenium complexes containing bis[4(4′-methyl-2,2′-bipyridyl)]-1,n-alkane (bbn) as a tetradentate ligand against three eukaryotic cell lines—BHK (baby hamster kidney), Caco-2 (heterogeneous human epithelial colorectal adenocarcinoma) and Hep-G2 (liver carcinoma)—have been determined. The results demonstrate that cis-α-[Ru(Me4phen)(bb7)]2+ (designated as α-Me4phen-bb7, where Me4phen = 3,4,7,8-tetramethyl-1,10-phenanthroline) showed little toxicity toward the three cell lines, and was considerably less toxic than cis-α-[Ru(phen)(bb12)]2+ (α-phen-bb12) and the dinuclear complex [{Ru(phen)2}2{μ-bb12}]4+. Fluorescence spectroscopy was used to study the binding of the ruthenium complexes with human serum albumin (HSA). The binding of α-Me4phen-bb7 to the macrocyclic host molecule cucurbit[10]uril (Q[10]) was examined by NMR spectroscopy. Large upfield 1H NMR chemical shift changes observed for the methylene protons in the bb7 ligand upon addition of Q[10], coupled with the observation of several intermolecular ROEs in ROESY spectra, indicated that α-Me4phen-bb7 bound Q[10] with the bb7 methylene carbons within the cavity and the metal center positioned outside one of the portals. Simple molecular modeling confirmed the feasibility of the binding model. An α-Me4phen-bb7-Q[10] binding constant of 9.9 ± 0.2 × 106 M−1 was determined by luminescence spectroscopy. Q[10]-encapsulation decreased the toxicity of α-Me4phen-bb7 against the three eukaryotic cell lines and increased the binding affinity of the ruthenium complex for HSA. Confocal microscopy experiments indicated that the level of accumulation of α-Me4phen-7 in BHK cells is not significantly affected by Q[10]-encapsulation. Taken together, the combined results suggest that α-Me4phen-7 could be a good candidate as a new antimicrobial agent, and Q[10]-encapsulation could be a method to improve the pharmacokinetics of the ruthenium complex.
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Affiliation(s)
- Biyun Sun
- School of Physical, Environmental and Mathematical Sciences, University of New South Wales, Australian Defence Force Academy, Canberra, ACT, Australia
| | - Ian F Musgrave
- Discipline of Pharmacology, Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia
| | - Anthony I Day
- School of Physical, Environmental and Mathematical Sciences, University of New South Wales, Australian Defence Force Academy, Canberra, ACT, Australia
| | - Kirsten Heimann
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,College of Science and Engineering, James Cook University, Townsville, QLD, Australia
| | - F Richard Keene
- Department of Chemistry, School of Physical Sciences, University of Adelaide, Adelaide, SA, Australia.,Australian Institute of Tropical Health and Medicine/Centre for Molecular Therapeutics, James Cook University, Townsville, QLD, Australia
| | - J Grant Collins
- School of Physical, Environmental and Mathematical Sciences, University of New South Wales, Australian Defence Force Academy, Canberra, ACT, Australia
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48
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Omar SAE, Scattergood PA, McKenzie LK, Jones C, Patmore NJ, Meijer AJHM, Weinstein JA, Rice CR, Bryant HE, Elliott PIP. Photophysical and Cellular Imaging Studies of Brightly Luminescent Osmium(II) Pyridyltriazole Complexes. Inorg Chem 2018; 57:13201-13212. [PMID: 30351084 DOI: 10.1021/acs.inorgchem.8b01627] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The series of complexes [Os(bpy)3- n(pytz) n][PF6]2 (bpy = 2,2'-bipyridyl, pytz = 1-benzyl-4-(pyrid-2-yl)-1,2,3-triazole, 1 n = 0, 2 n = 1, 3 n = 2, 4 n = 3) were prepared and characterized and are rare examples of luminescent 1,2,3-triazole-based osmium(II) complexes. For 3 we present an attractive and particularly mild preparative route via an osmium(II) η6-arene precursor circumventing the harsh conditions that are usually required. Because of the high spin-orbit coupling constant associated with the Os(II) center the absorption spectra of the complexes all display absorption bands of appreciable intensity in the range of 500-700 nm corresponding to spin-forbidden ground-state-to-3MLCT transitions (MLCT = metal-to-ligand charge transfer), which occur at significantly lower energies than the corresponding spin-allowed 1MLCT transitions. The homoleptic complex 4 is a bright emitter (λmaxem = 614 nm) with a relatively high quantum yield of emission of ∼40% in deoxygenated acetonitrile solutions at room temperature. Water-soluble chloride salts of 1-4 were also prepared, all of which remain emissive in aerated aqueous solutions at room temperature. The complexes were investigated for their potential as phosphorescent cellular imaging agents, whereby efficient excitation into the 3MLCT absorption bands at the red side of the visible range circumvents autofluorescence from biological specimens, which do not absorb in this region of the spectrum. Confocal microscopy reveals 4 to be readily taken up by cancer cell lines (HeLa and EJ) with apparent lysosomal and endosomal localization, while toxicity assays reveal that the compounds have low dark and light toxicity. These complexes therefore provide an excellent platform for the development of efficient luminescent cellular imaging agents with advantageous photophysical properties that enable excitation and emission in the biologically transparent region of the optical spectrum.
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Affiliation(s)
| | | | - Luke K McKenzie
- Academic Unit of Molecular Oncology, Sheffield Institute for Nucleic Acids, Department of Oncology and Metabolism , University of Sheffield , Beech Hill Road , Sheffield S10 2RX , U.K
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
| | - Callum Jones
- Academic Unit of Molecular Oncology, Sheffield Institute for Nucleic Acids, Department of Oncology and Metabolism , University of Sheffield , Beech Hill Road , Sheffield S10 2RX , U.K
| | | | - Anthony J H M Meijer
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
| | - Julia A Weinstein
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
| | | | - Helen E Bryant
- Academic Unit of Molecular Oncology, Sheffield Institute for Nucleic Acids, Department of Oncology and Metabolism , University of Sheffield , Beech Hill Road , Sheffield S10 2RX , U.K
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49
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Li X, Gorle AK, Sundaraneedi MK, Keene FR, Collins JG. Kinetically-inert polypyridylruthenium(II) complexes as therapeutic agents. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.11.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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50
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Allison SJ, Cooke D, Davidson FS, Elliott PIP, Faulkner RA, Griffiths HBS, Harper OJ, Hussain O, Owen-Lynch PJ, Phillips RM, Rice CR, Shepherd SL, Wheelhouse RT. Ruthenium-Containing Linear Helicates and Mesocates with Tuneable p53-Selective Cytotoxicity in Colorectal Cancer Cells. Angew Chem Int Ed Engl 2018; 57:9799-9804. [PMID: 29863754 DOI: 10.1002/anie.201805510] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Indexed: 12/26/2022]
Abstract
The ligands L1 and L2 both form separable dinuclear double-stranded helicate and mesocate complexes with RuII . In contrast to clinically approved platinates, the helicate isomer of [Ru2 (L1 )2 ]4+ was preferentially cytotoxic to isogenic cells (HCT116 p53-/- ), which lack the critical tumour suppressor gene. The mesocate isomer shows the reverse selectivity, with the achiral isomer being preferentially cytotoxic towards HCT116 p53+/+ . Other structurally similar RuII -containing dinuclear complexes showed very little cytotoxic activity. This study demonstrates that alterations in ligand or isomer can have profound effects on cytotoxicity towards cancer cells of different p53 status and suggests that selectivity can be "tuned" to either genotype. In the search for compounds that can target difficult-to-treat tumours that lack the p53 tumour suppressor gene, [Ru2 (L1 )2 ]4+ is a promising compound for further development.
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Affiliation(s)
- Simon J Allison
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - David Cooke
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Francesca S Davidson
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Paul I P Elliott
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Robert A Faulkner
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Hollie B S Griffiths
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Owen J Harper
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Omar Hussain
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - P Jane Owen-Lynch
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Roger M Phillips
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Craig R Rice
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Samantha L Shepherd
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
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