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Frota HF, Barbosa PF, Lorentino CMA, Affonso LRF, Ramos LS, Oliveira SSC, Souza LOP, Abosede OO, Ogunlaja AS, Branquinha MH, Santos ALS. Unveiling the antifungal mechanisms of CTP, a new copper(II)-theophylline/1,10-phenanthroline complex, on drug-resistant non-albicans Candida species. Biometals 2024:10.1007/s10534-024-00605-1. [PMID: 38874822 DOI: 10.1007/s10534-024-00605-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 04/20/2024] [Indexed: 06/15/2024]
Abstract
Candida species undeniably rank as the most prevalent opportunistic human fungal pathogens worldwide, with Candida albicans as the predominant representative. However, the emergence of non-albicans Candida species (NACs) has marked a significant shift, accompanied by rising incidence rates and concerning trends of antifungal resistance. The search for new strategies to combat antifungal-resistant Candida strains is of paramount importance. Recently, our research group reported the anti-Candida activity of a coordination compound containing copper(II) complexed with theophylline (theo) and 1,10-phenanthroline (phen), known as "CTP" - Cu(theo)2phen(H2O).5H2O. In the present work, we investigated the mechanisms of action of CTP against six medically relevant, antifungal-resistant NACs, including C. auris, C. glabrata, C. haemulonii, C. krusei, C. parapsilosis and C. tropicalis. CTP demonstrated significant efficacy in inhibiting mitochondrial dehydrogenases, leading to heightened intracellular reactive oxygen species production. CTP treatment resulted in substantial damage to the plasma membrane, as evidenced by the passive incorporation of propidium iodide, and induced DNA fragmentation as revealed by the TUNEL assay. Scanning electron microscopy images of post-CTP treatment NACs further illustrated profound alterations in the fungal surface morphology, including invaginations, cavitations and lysis. These surface modifications significantly impacted the ability of Candida cells to adhere to a polystyrene surface and to form robust biofilm structures. Moreover, CTP was effective in disassembling mature biofilms formed by these NACs. In conclusion, CTP represents a promising avenue for the development of novel antifungals with innovative mechanisms of action against clinically relevant NACs that are resistant to antifungals commonly used in clinical settings.
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Affiliation(s)
- Heloisa F Frota
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil
- Programa de Pós-Graduação Em Bioquímica (PPGBq), Instituto de Química, Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-909, Brazil
| | - Pedro F Barbosa
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil
| | - Carolline M A Lorentino
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil
| | - Lorena R F Affonso
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil
| | - Lívia S Ramos
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil
| | - Simone S C Oliveira
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil
| | - Lucieri O P Souza
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil
| | - Olufunso O Abosede
- Department of Chemistry, Federal University Otuoke, P.M.B 126, Yenagoa, Bayelsa State, Nigeria
- Department of Chemistry, Nelson Mandela University, PO Box 77000, Port Elizabeth, 6031, South Africa
| | - Adeniyi S Ogunlaja
- Department of Chemistry, Nelson Mandela University, PO Box 77000, Port Elizabeth, 6031, South Africa
| | - Marta H Branquinha
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil.
- Rede Micologia RJ - Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Rio de Janeiro, 21941-902, Brazil.
| | - André L S Santos
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-902, Brazil.
- Programa de Pós-Graduação Em Bioquímica (PPGBq), Instituto de Química, Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, 21941-909, Brazil.
- Rede Micologia RJ - Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Rio de Janeiro, 21941-902, Brazil.
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Mello TP, Aor AC, Barcellos IC, Pereira MM, McCann M, Devereux M, Branquinha MH, Santos AL. Active Cu(II), Mn(II) and Ag(I) 1,10-phenanthroline/1,10-phenanthroline-5,6-dione/dicarboxylate chelates: effects on Scedosporium. Future Microbiol 2023; 18:1049-1059. [PMID: 37284767 DOI: 10.2217/fmb-2022-0202] [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: 06/08/2023] Open
Abstract
Background: Scedosporium/Lomentospora species are human pathogens that are resistant to almost all antifungals currently available in clinical practice. Methods: The effects of 16 1,10-phenanthroline (phen)/1,10-phenanthroline-5,6-dione/dicarboxylate chelates containing Cu(II), Mn(II) and Ag(I) against Scedosporium apiospermum, Scedosporium minutisporum, Scedosporium aurantiacum and Lomentospora prolificans were evaluated. Results: To different degrees, all of the test chelates inhibited the viability of planktonic conidial cells, displaying MICs ranging from 0.029 to 72.08 μM. Generally, Mn(II)-containing chelates were the least toxic to lung epithelial cells, particularly [Mn2(oda)(phen)4(H2O)2][Mn2(oda)(phen)4(oda)2].4H2O (MICs: 1.62-3.25 μM: selectivity indexes >64). Moreover, this manganese-based chelate reduced the biofilm biomass formation and diminished the mature biofilm viability. Conclusion: [Mn2(oda)(phen)4(H2O)2][Mn2(oda)(phen)4(oda)2].4H2O opens a new chemotherapeutic avenue for the deactivation of these emergent, multidrug-resistant filamentous fungi.
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Affiliation(s)
- Thaís P Mello
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Centro de Ciências da Saúde (CCS), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Ana Carolina Aor
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Centro de Ciências da Saúde (CCS), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Iuri C Barcellos
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Centro de Ciências da Saúde (CCS), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Matheus M Pereira
- Chemical Engineering Processes and Forest Products Research Centre (CIEPQPF), Department of Chemical Engineering, University of Coimbra, Coimbra, Portugal
| | - Malachy McCann
- Chemistry Department, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Michael Devereux
- The Centre for Biomimetic and Therapeutic Research, Focas Research Institute, Technological University Dublin, Dublin, Ireland
| | - Marta H Branquinha
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Centro de Ciências da Saúde (CCS), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- Rede Micologia RJ and Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Rio de Janeiro, Brazil
| | - André Ls Santos
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Centro de Ciências da Saúde (CCS), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- Rede Micologia RJ and Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Rio de Janeiro, Brazil
- Programa de Pós-Graduação em Bioquímica (PPGBq), Instituto de Química (IQ), Universidade Federal do Rio de Janeiro (UFRJ), Brazil
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Rigo GV, Cardoso FG, Devereux M, McCann M, Macedo AJ, Santos ALS, Tasca T. Antimicrobial and Antibiofilm Activities of Copper(II)-1,10-phenanthroline-5,6-pione Against Commensal Bacteria and Fungi Responsible for Vaginal Microbiota Dysbiosis. Curr Microbiol 2023; 80:383. [PMID: 37870614 DOI: 10.1007/s00284-023-03500-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 09/15/2023] [Indexed: 10/24/2023]
Abstract
The disbalance of vaginal eubiotic microbiota can lead to overgrowth of Candida species and bacteria responsible for aerobic vaginitis, activating inflammatory pathways. The presence of Trichomonas vaginalis, a sexually transmitted protozoan pathogen, can be a predisposing factor for disordering the growth of bacterial/fungal pathogenic species due to the increase in pH and reduction of eubiotic microbiota. Herein, we evaluated the effects of the potent trichomonacidal compound, copper(II)-1,10-phenanthroline-5,6-dione (Cu-phendione), against pathogens responsible for candidiasis and aerobic vaginitis. Cu-phendione showed antimicrobial activity against Candida albicans, non-albicans Candida species (C. glabrata, C. krusei, C. parapsilosis, and C. tropicalis) and Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus, Enterococcus faecalis, and Streptococcus agalactiae) bacteria. Moreover, Cu-phendione was able to interfere with the fungal biofilm formation. These results highlight the antimicrobial potential of Cu-phendione against bacterial and fungal strains of vaginitis-causing infectious agents.
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Affiliation(s)
- Graziela V Rigo
- Faculdade de Farmácia and Centro de Biotecnologia, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - Fernanda G Cardoso
- Faculdade de Farmácia and Centro de Biotecnologia, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - Michael Devereux
- The Inorganic Pharmaceutical and Biomimetic Research Centre, Focas Research Institute, Dublin Institute of Technology, Dublin, Ireland
| | - Malachy McCann
- Chemistry Department, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Alexandre J Macedo
- Faculdade de Farmácia and Centro de Biotecnologia, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - André L S Santos
- Laboratório de Estudos Avançados de Microrganismos Emergentes E Resistentes, Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Tiana Tasca
- Faculdade de Farmácia and Centro de Biotecnologia, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil.
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Waters JE, Stevens-Cullinane L, Siebenmann L, Hess J. Recent advances in the development of metal complexes as antibacterial agents with metal-specific modes of action. Curr Opin Microbiol 2023; 75:102347. [PMID: 37467616 DOI: 10.1016/j.mib.2023.102347] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/19/2023] [Accepted: 05/23/2023] [Indexed: 07/21/2023]
Abstract
The mounting burden of antimicrobial resistance (AMR) is one of the most concerning threats to public health worldwide. With low economic incentives and a dwindling supply of new drugs in clinical pipelines, more innovative approaches to novel drug design and development are desperately required. Metal-based compounds are rapidly emerging as an alternative to organic drugs, as they have the ability to kill pathogens via metal-specific modes of action. We herein review recent advances in metal-based antibacterial agents, including metal complexes, metal ions and catalytic metallodrugs. The review concludes with a perspective on the rational design of metal-based antibiotics, and how we can exploit their unique properties to tackle AMR.
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Affiliation(s)
- Jessica E Waters
- Biological Inorganic Chemistry Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom; Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, United Kingdom
| | - Lars Stevens-Cullinane
- Biological Inorganic Chemistry Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom; Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, United Kingdom
| | - Lukas Siebenmann
- Biological Inorganic Chemistry Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom; Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, United Kingdom
| | - Jeannine Hess
- Biological Inorganic Chemistry Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom; Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, United Kingdom.
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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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Božić Cvijan B, Korać Jačić J, Bajčetić M. The Impact of Copper Ions on the Activity of Antibiotic Drugs. Molecules 2023; 28:5133. [PMID: 37446795 DOI: 10.3390/molecules28135133] [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: 05/11/2023] [Revised: 06/01/2023] [Accepted: 06/05/2023] [Indexed: 07/15/2023] Open
Abstract
Copper (Cu) is an essential trace metal and its concentration in body plasma is tightly regulated. An increase in Cu concentration in body fluids is observed in numerous pathological conditions, including infections caused by microorganisms. Evidence shows that Cu ions can impact the activity of antibiotics by increasing efficiency or diminishing/neutralizing antibiotic activity, forming complexes which may lead to antibiotic structure degradation. Herein, we represent the evidence available on Cu-antibiotic interactions and their possible impact on antimicrobial therapy efficiency. So far, in vitro studies described interactions between Cu ions and the majority of antibiotics in clinical use: penicillins, cephalosporins, carbapenems, macrolides, aminoglycosides, tetracyclines, fluoroquinolones, isoniazid, metronidazole. In vitro-described degradation or lower antimicrobial activity of amoxicillin, ampicillin, cefaclor, ceftriaxone, and meropenem in the presence of Cu ions suggest caution when using prescribed antibiotics in patients with altered Cu levels. On the other hand, several Cu-dependent compounds with antibacterial activity including the drug-resistant bacteria were discovered, such as thiosemicarbazones, disulfiram, dithiocarbamates, 8-hydroxiquinoline, phenanthrolines, pyrithione. Having in mind that the development of new antibiotics is already marked as inadequate and does not meet global needs, the potential of Cu-antibiotic interactions to change the efficiency of antimicrobial therapy requires further investigation.
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Affiliation(s)
- Bojana Božić Cvijan
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Jelena Korać Jačić
- Life Sciences Department, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11000 Belgrade, Serbia
| | - Milica Bajčetić
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
- Clinical Pharmacology Unit, University Children's Hospital, 11000 Belgrade, Serbia
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Silva-Oliveira R, Sangenito LS, Reddy A, Velasco-Torrijos T, Santos ALS, Branquinha MH. In Vitro Effects of Aminopyridyl Ligands Complexed to Copper(II) on the Physiology and Interaction Process of Trypanosoma cruzi. Trop Med Infect Dis 2023; 8:tropicalmed8050288. [PMID: 37235336 DOI: 10.3390/tropicalmed8050288] [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: 03/24/2023] [Revised: 05/17/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023] Open
Abstract
Chagas disease is derived from the infection by the protozoan Trypanosoma cruzi. In many countries, benznidazole is the only drug approved for clinical use despite several side effects and the emergence of resistant parasite strains. In this context, our group has previously pointed out that two novel aminopyridine derivatives complexed with Cu2+, namely, cis-aquadichloro(N-[4-(hydroxyphenyl)methyl]-2-pyridinemethamino)copper (3a) and its glycosylated ligand cis-dichloro (N-{[4-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)pheny]lmethyl}-2-pyridinemethamino)copper (3b), are effective against T. cruzi trypomastigote forms. With this result in mind, the present work aimed to investigate the effects of both compounds on trypomastigotes physiology and on the interaction process with host cells. Apart from loss of plasma membrane integrity, an increased generation of reactive oxygen species (ROS) and decreased mitochondrial metabolism were observed. Pretreatment of trypomastigotes with these metallodrugs inhibited the association index with LLC-MK2 cells in a typical dose-dependent manner. Both compounds showed low toxicity on mammalian cells (CC50 > 100 µM), and the IC50 values calculated for intracellular amastigotes were determined as 14.4 µM for 3a and 27.1 µM for 3b. This set of results demonstrates the potential of these aminopyridines complexed with Cu2+ as promising candidates for further antitrypanosomal drug development.
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Affiliation(s)
- Rafaela Silva-Oliveira
- Laboratório de Estudos Avancados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Leandro S Sangenito
- Laboratório de Estudos Avancados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Nilópolis 26530-060, Brazil
| | - Andrew Reddy
- Ferrier Research Institute, Victoria University of Wellington, Lower Hutt 5010, New Zealand
| | - Trinidad Velasco-Torrijos
- Department of Chemistry, Maynooth University, W23VP22 Maynooth, Co. Kildare, Ireland
- The Kathleen Lonsdale Institute for Human Health Research, Maynooth University, W23VP22 Maynooth, Co. Kildare, Ireland
| | - André L S Santos
- Laboratório de Estudos Avancados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Programa de Pós-Graduação em Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Marta H Branquinha
- Laboratório de Estudos Avancados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
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Antibacterial activity of metal-phenanthroline complexes against multidrug-resistant Irish clinical isolates: a whole genome sequencing approach. J Biol Inorg Chem 2023; 28:153-171. [PMID: 36484826 PMCID: PMC9734640 DOI: 10.1007/s00775-022-01979-8] [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: 07/21/2022] [Accepted: 11/08/2022] [Indexed: 12/14/2022]
Abstract
Antimicrobial resistance (AMR) is one of the serious global health challenges of our time. There is now an urgent need to develop novel therapeutic agents that can overcome AMR, preferably through alternative mechanistic pathways from conventional treatments. The antibacterial activity of metal complexes (metal = Cu(II), Mn(II), and Ag(I)) incorporating 1,10-phenanthroline (phen) and various dianionic dicarboxylate ligands, along with their simple metal salt and dicarboxylic acid precursors, against common AMR pathogens were investigated. Overall, the highest level of antibacterial activity was evident in compounds that incorporate the phen ligand compared to the activities of their simple salt and dicarboxylic acid precursors. The chelates incorporating both phen and the dianion of 3,6,9-trioxaundecanedioic acid (tdda) were the most effective, and the activity varied depending on the metal centre. Whole-genome sequencing (WGS) was carried out on the reference Pseudomonas aeruginosa strain, PAO1. This strain was exposed to sub-lethal doses of lead metal-tdda-phen complexes to form mutants with induced resistance properties with the aim of elucidating their mechanism of action. Various mutations were detected in the mutant P. aeruginosa genome, causing amino acid changes to proteins involved in cellular respiration, the polyamine biosynthetic pathway, and virulence mechanisms. This study provides insights into acquired resistance mechanisms of pathogenic organisms exposed to Cu(II), Mn(II), and Ag(I) complexes incorporating phen with tdda and warrants further development of these potential complexes as alternative clinical therapeutic drugs to treat AMR infections.
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The Anti- Leishmania amazonensis and Anti- Leishmania chagasi Action of Copper(II) and Silver(I) 1,10-Phenanthroline-5,6-dione Coordination Compounds. Pathogens 2023; 12:pathogens12010070. [PMID: 36678418 PMCID: PMC9865435 DOI: 10.3390/pathogens12010070] [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: 10/24/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 01/04/2023] Open
Abstract
Leishmaniasis is a neglected disease caused by protozoa belonging to the Leishmania genus. Notably, the search for new, promising and potent anti-Leishmania compounds remains a major goal due to the inefficacy of the available drugs used nowadays. In the present work, we evaluated the effects of 1,10-phenanthroline-5,6-dione (phendione) coordinated to silver(I), [Ag(phendione)2]ClO4 (Ag-phendione), and copper(II), [Cu(phendione)3](ClO4)2·4H2O (Cu-phendione), as potential drugs to be used in the chemotherapy against Leishmania amazonensis and Leishmania chagasi. The results showed that promastigotes treated with Ag-phendione and Cu-phendione presented a significant reduction in the proliferation rate. The IC50 values calculated to Ag-phendione and Cu-phendione, respectively, were 7.8 nM and 7.5 nM for L. amazonensis and 24.5 nM and 20.0 nM for L. chagasi. Microscopical analyses revealed several relevant morphological changes in promastigotes, such as a rounding of the cell body and a shortening/loss of the single flagellum. Moreover, the treatment promoted alterations in the unique mitochondrion of these parasites, inducing significant reductions on both metabolic activity and membrane potential parameters. All these cellular perturbations induced the triggering of apoptosis-like death in these parasites, as judged by the (i) increased percentage of annexin-positive/propidium iodide negative cells, (ii) augmentation in the proportion of parasites in the sub-G0/G1 phase and (iii) DNA fragmentation. Finally, the test compounds showed potent effects against intracellular amastigotes; contrarily, these molecules were well tolerated by THP-1 macrophages, which resulted in excellent selective index values. Overall, the results highlight new selective and effective drugs against Leishmania species, which are important etiological agents of both cutaneous (L. amazonensis) and visceral (L. chagasi) leishmaniasis in a global perspective.
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Interactions of novel pyrazole ligand and its transition metal complexes with CT-DNA and BSA: a combination of experimental and computational studies. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Muslim M, Ahmad M, Arish M, Alam MJ, Alarifi A, Afzal M, Sepay N, Ahmad S. 5-Hydroxyisophthalic acid and neocuproine containing copper(II) complex as a promising cytotoxic agent: Structure elucidation, topology, Hirshfeld surface, DFT calculations, and molecular docking analysis. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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