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Goh KGK, Desai D, Thapa R, Prince D, Acharya D, Sullivan MJ, Ulett GC. An opportunistic pathogen under stress: how Group B Streptococcus responds to cytotoxic reactive species and conditions of metal ion imbalance to survive. FEMS Microbiol Rev 2024; 48:fuae009. [PMID: 38678005 PMCID: PMC11098048 DOI: 10.1093/femsre/fuae009] [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: 08/31/2023] [Revised: 03/26/2024] [Accepted: 04/16/2024] [Indexed: 04/29/2024] Open
Abstract
Group B Streptococcus (GBS; also known as Streptococcus agalactiae) is an opportunistic bacterial pathogen that causes sepsis, meningitis, pneumonia, and skin and soft tissue infections in neonates and healthy or immunocompromised adults. GBS is well-adapted to survive in humans due to a plethora of virulence mechanisms that afford responses to support bacterial survival in dynamic host environments. These mechanisms and responses include counteraction of cell death from exposure to excess metal ions that can cause mismetallation and cytotoxicity, and strategies to combat molecules such as reactive oxygen and nitrogen species that are generated as part of innate host defence. Cytotoxicity from reactive molecules can stem from damage to proteins, DNA, and membrane lipids, potentially leading to bacterial cell death inside phagocytic cells or within extracellular spaces within the host. Deciphering the ways in which GBS responds to the stress of cytotoxic reactive molecules within the host will benefit the development of novel therapeutic and preventative strategies to manage the burden of GBS disease. This review summarizes knowledge of GBS carriage in humans and the mechanisms used by the bacteria to circumvent killing by these important elements of host immune defence: oxidative stress, nitrosative stress, and stress from metal ion intoxication/mismetallation.
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Affiliation(s)
- Kelvin G K Goh
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast Campus, QLD 4222, Australia
| | - Devika Desai
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast Campus, QLD 4222, Australia
| | - Ruby Thapa
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast Campus, QLD 4222, Australia
| | - Darren Prince
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast Campus, QLD 4222, Australia
| | - Dhruba Acharya
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast Campus, QLD 4222, Australia
| | - Matthew J Sullivan
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast Campus, QLD 4222, Australia
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, United Kingdom
| | - Glen C Ulett
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast Campus, QLD 4222, Australia
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2
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Sullivan MJ, Terán I, Goh KG, Ulett GC. Resisting death by metal: metabolism and Cu/Zn homeostasis in bacteria. Emerg Top Life Sci 2024; 8:45-56. [PMID: 38362914 PMCID: PMC10903455 DOI: 10.1042/etls20230115] [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] [Received: 10/16/2023] [Revised: 01/31/2024] [Accepted: 02/04/2024] [Indexed: 02/17/2024]
Abstract
Metal ions such as zinc and copper play important roles in host-microbe interactions and their availability can drastically affect the survival of pathogenic bacteria in a host niche. Mechanisms of metal homeostasis protect bacteria from starvation, or intoxication, defined as when metals are limiting, or in excess, respectively. In this mini-review, we summarise current knowledge on the mechanisms of resistance to metal stress in bacteria, focussing specifically on the homeostasis of cellular copper and zinc. This includes a summary of the factors that subvert metal stress in bacteria, which are independent of metal efflux systems, and commentary on the role of small molecules and metabolic systems as important mediators of metal resistance.
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Affiliation(s)
- Matthew J. Sullivan
- School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Gold Coast, QLD 4222, Australia
| | - Ignacio Terán
- School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Kelvin G.K. Goh
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Gold Coast, QLD 4222, Australia
| | - Glen C. Ulett
- School of Pharmacy and Medical Sciences, and Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Gold Coast, QLD 4222, Australia
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3
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de Souza LM, Joaquim AR, Gava A, Ficagna E, Almança MAK, Andrade SF, Fuentefria AM. In vitro evaluation of the efficacy of 8-hydroxyquinoline derivatives for the control of Phaeomoniella chlamydospora, the causative agent of Petri disease in grapevines. J Appl Microbiol 2023; 134:lxad228. [PMID: 37804172 DOI: 10.1093/jambio/lxad228] [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] [Received: 11/28/2022] [Revised: 09/27/2023] [Accepted: 10/05/2023] [Indexed: 10/09/2023]
Abstract
AIM This study evaluates the in vitro efficacy of 8-hydroxyquinoline (8HQ) derivatives in controlling the phytopathogenic fungus Phaeomoniella chlamydospora. METHODS AND RESULTS The in vitro tests assessed the susceptibility to the minimum inhibitory concentration (MIC), checkerboard assay, mycelial growth (MG) inhibition, and EC50 determination. Among the seven agricultural fungicides tested, tebuconazole (TEB) displayed the lowest MIC, 1.01 µg mL-1, followed by captan (CAP), thiophanate methyl (TM), and mancozeb with MICs of 4.06, 5.46, and 10.62 µg mL-1, respectively. The 8HQ derivatives used in this study were clioquinol and PH 151 (PH) with MICs of 1.09 and 2.02 µg mL-1, respectively. PH associated with TEB and CAP showed synergism and inhibited 95.8% of MG at the highest dose. TEB inhibited 100% of MG at the three highest doses, while associated with PH exhibited the lowest EC50 (0.863 + 0.0381 µg mL-1). CONCLUSIONS We concluded that the 8HQ derivatives tested controlled effectively the P. chlamydospora in vitro. PH associated with CAP and TEB exhibited a synergistic effect. The association between PH and TM was considered indifferent. IMPACT STATEMENT This study expands the list of active ingredients tested against P. chlamydospora, with the PH 151 and clioquinol derivatives being tested for the first time. The in vitro efficacy and synergistic action with other fungicides suggest a potential use as a grapevine wound protectant. This association makes it possible to reduce doses and increase the potency of both drugs, reducing the risk of resistance development and harm to humans and the environment.
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Affiliation(s)
- Luciana M de Souza
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS. 90035-003, Brazil
- Instituto Federal do Rio Grande do Sul/Campus Bento Gonçalves, Bento Gonçalves/RS. 95700-000, Brazil
| | - Angelica R Joaquim
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS. 90610-000, Brazil
| | - Angelo Gava
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS. 90035-003, Brazil
| | - Evandro Ficagna
- Instituto Federal do Rio Grande do Sul/Campus Bento Gonçalves, Bento Gonçalves/RS. 95700-000, Brazil
| | - Marcus A K Almança
- Instituto Federal do Rio Grande do Sul/Campus Bento Gonçalves, Bento Gonçalves/RS. 95700-000, Brazil
| | - Saulo F Andrade
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS. 90035-003, Brazil
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS. 90610-000, Brazil
| | - Alexandre M Fuentefria
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS. 90035-003, Brazil
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS. 90610-000, Brazil
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4
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O'Brien H, Davoodian T, Johnson MDL. The promise of copper ionophores as antimicrobials. Curr Opin Microbiol 2023; 75:102355. [PMID: 37406562 PMCID: PMC10529258 DOI: 10.1016/j.mib.2023.102355] [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: 11/03/2022] [Revised: 05/31/2023] [Accepted: 06/09/2023] [Indexed: 07/07/2023]
Abstract
Antibiotic-resistant microbe-mediated deaths are a major worldwide health issue. Unfortunately, due to microbial adaptation to develop resistance, some antibiotics are nullified early in their usage, and worse, resistance is detected before they can even be prescribed. Copper's toxicity since antiquity against microbes at the host-pathogen interface offers a fascinating weapon to fight antimicrobial resistance. Here, we briefly review why copper is so effective, how drugs that work with copper are effective antimicrobials, and how compounds such as these could reinvigorate investment in antimicrobial development.
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Affiliation(s)
- Henrik O'Brien
- Department of Immunobiology, University of Arizona College of Medicine - Tucson, Tucson, AZ 85724, USA
| | - Talish Davoodian
- Department of Immunobiology, University of Arizona College of Medicine - Tucson, Tucson, AZ 85724, USA
| | - Michael D L Johnson
- Department of Immunobiology, University of Arizona College of Medicine - Tucson, Tucson, AZ 85724, USA; Valley Fever Center for Excellence, University of Arizona College of Medicine - Tucson, Tucson, AZ 85724, USA; BIO5 Institute, University of Arizona College of Medicine - Tucson, Tucson, AZ 85724, USA; Asthma and Airway Disease Research Center, University of Arizona College of Medicine - Tucson, Tucson, AZ 85724, USA.
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5
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Downes SG, Doyle S, Jones GW, Owens RA. Gliotoxin and related metabolites as zinc chelators: implications and exploitation to overcome antimicrobial resistance. Essays Biochem 2023; 67:769-780. [PMID: 36876884 PMCID: PMC10500201 DOI: 10.1042/ebc20220222] [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] [Received: 12/21/2022] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 03/07/2023]
Abstract
Antimicrobial resistance (AMR) is a major global problem and threat to humanity. The search for new antibiotics is directed towards targeting of novel microbial systems and enzymes, as well as augmenting the activity of pre-existing antimicrobials. Sulphur-containing metabolites (e.g., auranofin and bacterial dithiolopyrrolones [e.g., holomycin]) and Zn2+-chelating ionophores (PBT2) have emerged as important antimicrobial classes. The sulphur-containing, non-ribosomal peptide gliotoxin, biosynthesised by Aspergillus fumigatus and other fungi exhibits potent antimicrobial activity, especially in the dithiol form (dithiol gliotoxin; DTG). Specifically, it has been revealed that deletion of the enzymes gliotoxin oxidoreductase GliT, bis-thiomethyltransferase GtmA or the transporter GliA dramatically sensitise A. fumigatus to gliotoxin presence. Indeed, the double deletion strain A. fumigatus ΔgliTΔgtmA is especially sensitive to gliotoxin-mediated growth inhibition, which can be reversed by Zn2+ presence. Moreover, DTG is a Zn2+ chelator which can eject zinc from enzymes and inhibit activity. Although multiple studies have demonstrated the potent antibacterial effect of gliotoxin, no mechanistic details are available. Interestingly, reduced holomycin can inhibit metallo-β-lactamases. Since holomycin and gliotoxin can chelate Zn2+, resulting in metalloenzyme inhibition, we propose that this metal-chelating characteristic of these metabolites requires immediate investigation to identify new antibacterial drug targets or to augment the activity of existing antimicrobials. Given that (i) gliotoxin has been shown in vitro to significantly enhance vancomycin activity against Staphylococcus aureus, and (ii) that it has been independently proposed as an ideal probe to dissect the central 'Integrator' role of Zn2+ in bacteria - we contend such studies are immediately undertaken to help address AMR.
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Affiliation(s)
- Shane G Downes
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Sean Doyle
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Gary W Jones
- Centre for Biomedical Science Research, School of Health, Leeds Beckett University, Leeds LS1 3HE, U.K
| | - Rebecca A Owens
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
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6
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Drew SC. Chelator PBT2 Forms a Ternary Cu 2+ Complex with β-Amyloid That Has High Stability but Low Specificity. Int J Mol Sci 2023; 24:ijms24119267. [PMID: 37298218 DOI: 10.3390/ijms24119267] [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: 05/01/2023] [Revised: 05/18/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
The metal chelator PBT2 (5,7-dichloro-2-[(dimethylamino)methyl]-8-hydroxyquinoline) acts as a terdentate ligand capable of forming binary and ternary Cu2+ complexes. It was clinically trialed as an Alzheimer's disease (AD) therapy but failed to progress beyond phase II. The β-amyloid (Aβ) peptide associated with AD was recently concluded to form a unique Cu(Aβ) complex that is inaccessible to PBT2. Herein, it is shown that the species ascribed to this binary Cu(Aβ) complex in fact corresponds to ternary Cu(PBT2)NImAβ complexes formed by the anchoring of Cu(PBT2) on imine nitrogen (NIm) donors of His side chains. The primary site of ternary complex formation is His6, with a conditional stepwise formation constant at pH 7.4 (Kc [M-1]) of logKc = 6.4 ± 0.1, and a second site is supplied by His13 or His14 (logKc = 4.4 ± 0.1). The stability of Cu(PBT2)NImH13/14 is comparable with that of the simplest Cu(PBT2)NIm complexes involving the NIm coordination of free imidazole (logKc = 4.22 ± 0.09) and histamine (logKc = 4.00 ± 0.05). The 100-fold larger formation constant for Cu(PBT2)NImH6 indicates that outer-sphere ligand-peptide interactions strongly stabilize its structure. Despite the relatively high stability of Cu(PBT2)NImH6, PBT2 is a promiscuous chelator capable of forming a ternary Cu(PBT2)NIm complex with any ligand containing an NIm donor. These ligands include histamine, L-His, and ubiquitous His side chains of peptides and proteins in the extracellular milieu, whose combined effect should outweigh that of a single Cu(PBT2)NImH6 complex regardless of its stability. We therefore conclude that PBT2 is capable of accessing Cu(Aβ) complexes with high stability but low specificity. The results have implications for future AD therapeutic strategies and understanding the role of PBT2 in the bulk transport of transition metal ions. Given the repurposing of PBT2 as a drug for breaking antibiotic resistance, ternary Cu(PBT2)NIm and analogous Zn(PBT2)NIm complexes may be relevant to its antimicrobial properties.
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Affiliation(s)
- Simon C Drew
- Brain-Immune Communication Lab, Institut Pasteur, Université Paris Cité, F-75015 Paris, France
- Department of Medicine (Royal Melbourne Hospital), The University of Melbourne, Victoria 3010, Australia
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7
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Anderson E, Nair B, Nizet V, Kumar G. Man vs Microbes - The Race of the Century. J Med Microbiol 2023; 72. [PMID: 36748622 DOI: 10.1099/jmm.0.001646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The complexity of the antimicrobial resistance (AMR) crisis and its global impact on healthcare invokes an urgent need to understand the underlying forces and to conceive and implement innovative solutions. Beyond focusing on a traditional pathogen-centric approach to antibiotic discovery yielding diminishing returns, future therapeutic interventions can expand to focus more comprehensively on host-pathogen interactions. In this manner, increasing the resiliency of our innate immune system or attenuating the virulence mechanisms of the pathogens can be explored to improve therapeutic outcomes. Key pathogen survival strategies such as tolerance, persistence, aggregation, and biofilm formation can be considered and interrupted to sensitize pathogens for more efficient immune clearance. Understanding the evolution and emergence of so-called 'super clones' that drive AMR spread with rapid clonotyping assays may guide more precise antibiotic regimens. Innovative alternatives to classical antibiotics such as bacteriophage therapy, novel engineered peptide antibiotics, ionophores, nanomedicines, and repurposing drugs from other domains of medicine to boost innate immunity are beginning to be successfully implemented to combat AMR. Policy changes supporting shorter durations of antibiotic treatment, greater antibiotic stewardship, and increased surveillance measures can enhance patient safety and enable implementation of the next generation of targeted prevention and control programmes at a global level.
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Affiliation(s)
- Ericka Anderson
- Collaborative to Halt Antibiotic Resistant Microbes (CHARM), Department of Pediatrics University of California San Diego, La Jolla, CA, USA
| | - Bipin Nair
- School of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
| | - Victor Nizet
- Collaborative to Halt Antibiotic Resistant Microbes (CHARM), Department of Pediatrics University of California San Diego, La Jolla, CA, USA.,Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San Diego, La Jolla, CA, USA
| | - Geetha Kumar
- School of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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8
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Yamada K, Deb A, Shoba VM, Lim D, Maji B, Modell AE, Choudhary A. Rational Design of Silicon-Based Zinc Ionophores. Angew Chem Int Ed Engl 2022; 61:e202201698. [PMID: 35385189 DOI: 10.1002/anie.202201698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Indexed: 01/24/2023]
Abstract
Ionophores transport ions across biological membranes and have wide-ranging applications, but a platform for their rapid development does not exist. We report a platform for developing ionophores from metal-ion chelators, which are readily available with wide-ranging affinities and specificities, and structural data that can aid rational design. Specifically, we fine-tuned the binding affinity and lipophilicity of a ZnII -chelating ligand by introducing silyl groups proximal to the ZnII -binding pocket, which generated ionophores that performed better than most of the currently known ZnII ionophores. Furthermore, these silicon-based ionophores were specific for ZnII over other metals and exhibited better antibacterial activity and less toxicity to mammalian cells than several known ZnII ionophores, including pyrithione. These studies establish rational design principles for the rapid development of potent and specific ionophores and a new class of antibacterial agents.
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Affiliation(s)
- Kei Yamada
- Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Arghya Deb
- Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Veronika M Shoba
- Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.,Divisions of Renal Medicine and Engineering, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Donghyun Lim
- Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.,Divisions of Renal Medicine and Engineering, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Basudeb Maji
- Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.,Divisions of Renal Medicine and Engineering, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Ashley E Modell
- Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.,Divisions of Renal Medicine and Engineering, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Amit Choudhary
- Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.,Divisions of Renal Medicine and Engineering, Brigham and Women's Hospital, Boston, MA 02115, USA
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9
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Kavanagh ON, Bhattacharya S, Marchetti L, Elmes R, O’Sullivan F, Farragher JP, Robinson S, Thompson D, Walker GM. Hydroxychloroquine Does Not Function as a Direct Zinc Ionophore. Pharmaceutics 2022; 14:pharmaceutics14050899. [PMID: 35631485 PMCID: PMC9147311 DOI: 10.3390/pharmaceutics14050899] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/11/2022] [Accepted: 04/15/2022] [Indexed: 02/04/2023] Open
Abstract
Drug-mediated correction of abnormal biological zinc homeostasis could provide new routes to treating neurodegeneration, cancer, and viral infections. Designing therapeutics to facilitate zinc transport intracellularly is hampered by inadequate concentrations of endogenous zinc, which is often protein-bound in vivo. We found strong evidence that hydroxychloroquine, a drug used to treat malaria and employed as a potential treatment for COVID-19, does not bind and transport zinc across biological membranes through ionophoric mechanisms, contrary to recent claims. In vitro complexation studies and liposomal transport assays are correlated with cellular zinc assays in A549 lung epithelial cells to confirm the indirect mechanism of hydroxychloroquine-mediated elevation in intracellular zinc without ionophorism. Molecular simulations show hydroxychloroquine-triggered helix perturbation in zinc-finger protein without zinc chelation, a potential alternative non-ionophoric mechanism.
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Affiliation(s)
- Oisín N. Kavanagh
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- School of Pharmacy, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
- Department of Chemical Sciences, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
- Department of Chemistry, Maynooth University (National University of Ireland), W23 F2H6 Maynooth, Ireland
- National Institute for Cellular Biotechnology, Dublin City University, D09 NR58 Dublin, Ireland
- Correspondence:
| | - Shayon Bhattacharya
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- Department of Physics, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Luke Marchetti
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- Department of Chemistry, Maynooth University (National University of Ireland), W23 F2H6 Maynooth, Ireland
| | - Robert Elmes
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- Department of Chemistry, Maynooth University (National University of Ireland), W23 F2H6 Maynooth, Ireland
| | - Finbarr O’Sullivan
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- National Institute for Cellular Biotechnology, Dublin City University, D09 NR58 Dublin, Ireland
| | - John P. Farragher
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
| | - Shane Robinson
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- Janssen Pharmaceutical Sciences, T45 P663 Cork, Ireland
| | - Damien Thompson
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- Department of Physics, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Gavin M. Walker
- SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (S.B.); (L.M.); (R.E.); (F.O.); (J.P.F.); (S.R.); (D.T.); (G.M.W.)
- Department of Chemical Sciences, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
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10
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Chen Y, Cai J, Liu D, Liu S, Lei D, Zheng L, Wei Q, Gao M. Zinc based metal organic framework with antibacterial and anti- inflammatory properties for promoting wound healing. Regen Biomater 2022; 9:rbac019. [PMID: 35493287 PMCID: PMC9046580 DOI: 10.1093/rb/rbac019] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 11/14/2022] Open
Abstract
The synergistic effect of antibacterial and anti-inflammatory is needed to overcome the problem of wound healing difficulties. Based on the favorable antibacterial and anti-inflammatory effect of zinc ions (Zn2+) and the physicochemical properties of metal organic frameworks (MOFs), we prepared nanosized zinc-based MOF: Zn-BTC with the ability to slowly release Zn2+. In cellular levels, Zn-BTC possessed lower toxicity to fibroblasts and enhanced capacity of cell proliferation and migration. It also had good bactericidal effect on multiple drug-resistant bacteria by reducing 41.4% MRSA and 47.2% Escherichia coli. In addition, Zn-BTC also displayed the ability of lowering the expression of antioxidant genes: superoxide dismutase 1, superoxide dismutase 2 and interleukin 6, and enhancing the expression of wound healing genes: transforming growth factors-β and type I collagen. Finally, it also demonstrated that Zn-BTC could effectively improve the skin wound healing of SD rats and had no toxicity on major organs. The favorable biocompatibility, antibacterial and anti-inflammatory properties of Zn-BTC gave a new insight of designing novel MOFs for promoting skin wound healing.
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Affiliation(s)
- Yuting Chen
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Jinhong Cai
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Collaborative Innovation Center of Regenerative Medicine and Medical Bioresource Development and Application, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Dachang Liu
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Shuhan Liu
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Collaborative Innovation Center of Regenerative Medicine and Medical Bioresource Development and Application, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Doudou Lei
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Collaborative Innovation Center of Regenerative Medicine and Medical Bioresource Development and Application, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Li Zheng
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Collaborative Innovation Center of Regenerative Medicine and Medical Bioresource Development and Application, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Regenerative Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Qingjun Wei
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Collaborative Innovation Center of Regenerative Medicine and Medical Bioresource Development and Application, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Ming Gao
- Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Collaborative Innovation Center of Regenerative Medicine and Medical Bioresource Development and Application, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
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11
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Yamada K, Deb A, Shoba VM, Lim D, Maji B, Modell AE, Choudhary A. Rational Design of Silicon‐Based Zinc Ionophores. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kei Yamada
- Chemical Biology and Therapeutics Science Broad Institute of MIT and Harvard Cambridge MA 02142 USA
- Department of Medicine Harvard Medical School Boston MA 02115 USA
| | - Arghya Deb
- Chemical Biology and Therapeutics Science Broad Institute of MIT and Harvard Cambridge MA 02142 USA
- Department of Medicine Harvard Medical School Boston MA 02115 USA
| | - Veronika M. Shoba
- Chemical Biology and Therapeutics Science Broad Institute of MIT and Harvard Cambridge MA 02142 USA
- Department of Medicine Harvard Medical School Boston MA 02115 USA
- Divisions of Renal Medicine and Engineering Brigham and Women's Hospital Boston MA 02115 USA
| | - Donghyun Lim
- Chemical Biology and Therapeutics Science Broad Institute of MIT and Harvard Cambridge MA 02142 USA
- Department of Medicine Harvard Medical School Boston MA 02115 USA
- Divisions of Renal Medicine and Engineering Brigham and Women's Hospital Boston MA 02115 USA
| | - Basudeb Maji
- Chemical Biology and Therapeutics Science Broad Institute of MIT and Harvard Cambridge MA 02142 USA
- Department of Medicine Harvard Medical School Boston MA 02115 USA
- Divisions of Renal Medicine and Engineering Brigham and Women's Hospital Boston MA 02115 USA
| | - Ashley E. Modell
- Chemical Biology and Therapeutics Science Broad Institute of MIT and Harvard Cambridge MA 02142 USA
- Department of Medicine Harvard Medical School Boston MA 02115 USA
- Divisions of Renal Medicine and Engineering Brigham and Women's Hospital Boston MA 02115 USA
| | - Amit Choudhary
- Chemical Biology and Therapeutics Science Broad Institute of MIT and Harvard Cambridge MA 02142 USA
- Department of Medicine Harvard Medical School Boston MA 02115 USA
- Divisions of Renal Medicine and Engineering Brigham and Women's Hospital Boston MA 02115 USA
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12
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De Oliveira DMP, Keller B, Hayes AJ, Ong CLY, Harbison-Price N, El-Deeb IM, Li G, Keller N, Bohlmann L, Brouwer S, Turner AG, Cork AJ, Jones TR, Paterson DL, McEwan AG, Davies MR, McDevitt CA, von Itzstein M, Walker MJ. Neurodegenerative Disease Treatment Drug PBT2 Breaks Intrinsic Polymyxin Resistance in Gram-Positive Bacteria. Antibiotics (Basel) 2022; 11:antibiotics11040449. [PMID: 35453201 PMCID: PMC9027797 DOI: 10.3390/antibiotics11040449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 12/03/2022] Open
Abstract
Gram-positive bacteria do not produce lipopolysaccharide as a cell wall component. As such, the polymyxin class of antibiotics, which exert bactericidal activity against Gram-negative pathogens, are ineffective against Gram-positive bacteria. The safe-for-human-use hydroxyquinoline analog ionophore PBT2 has been previously shown to break polymyxin resistance in Gram-negative bacteria, independent of the lipopolysaccharide modification pathways that confer polymyxin resistance. Here, in combination with zinc, PBT2 was shown to break intrinsic polymyxin resistance in Streptococcus pyogenes (Group A Streptococcus; GAS), Staphylococcus aureus (including methicillin-resistant S. aureus), and vancomycin-resistant Enterococcus faecium. Using the globally disseminated M1T1 GAS strain 5448 as a proof of principle model, colistin in the presence of PBT2 + zinc was shown to be bactericidal in activity. Any resistance that did arise imposed a substantial fitness cost. PBT2 + zinc dysregulated GAS metal ion homeostasis, notably decreasing the cellular manganese content. Using a murine model of wound infection, PBT2 in combination with zinc and colistin proved an efficacious treatment against streptococcal skin infection. These findings provide a foundation from which to investigate the utility of PBT2 and next-generation polymyxin antibiotics for the treatment of Gram-positive bacterial infections.
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Affiliation(s)
- David M. P. De Oliveira
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Bernhard Keller
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Andrew J. Hayes
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia; (A.J.H.); (M.R.D.); (C.A.M.)
| | - Cheryl-Lynn Y. Ong
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Nichaela Harbison-Price
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Ibrahim M. El-Deeb
- Institute for Glycomics, Griffith University, Gold Coast, QLD 4222, Australia; (I.M.E.-D.); (M.v.I.)
| | - Gen Li
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Nadia Keller
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Lisa Bohlmann
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Stephan Brouwer
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Andrew G. Turner
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Amanda J. Cork
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Thomas R. Jones
- School of Earth and Environmental Sciences, The University of Queensland, Brisbane, QLD 4072, Australia;
| | - David L. Paterson
- Australian Infectious Diseases Research Centre, UQ Centre for Clinical Research, The University of Queensland, Brisbane, QLD 4006, Australia;
| | - Alastair G. McEwan
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
| | - Mark R. Davies
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia; (A.J.H.); (M.R.D.); (C.A.M.)
| | - Christopher A. McDevitt
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia; (A.J.H.); (M.R.D.); (C.A.M.)
| | - Mark von Itzstein
- Institute for Glycomics, Griffith University, Gold Coast, QLD 4222, Australia; (I.M.E.-D.); (M.v.I.)
| | - Mark J. Walker
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia; (D.M.P.D.O.); (B.K.); (C.-L.Y.O.); (N.H.-P.); (G.L.); (N.K.); (L.B.); (S.B.); (A.G.T.); (A.J.C.); (A.G.M.)
- Correspondence: ; Tel.: +61-7-33461623
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13
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Dysregulation of Streptococcus pneumoniae zinc homeostasis breaks ampicillin resistance in a pneumonia infection model. Cell Rep 2022; 38:110202. [PMID: 35021083 PMCID: PMC9084593 DOI: 10.1016/j.celrep.2021.110202] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 09/24/2021] [Accepted: 12/13/2021] [Indexed: 11/20/2022] Open
Abstract
Streptococcus pneumoniae is the primary cause of community-acquired bacterial pneumonia with rates of penicillin and multidrug-resistance exceeding 80% and 40%, respectively. The innate immune response generates a variety of antimicrobial agents to control infection, including zinc stress. Here, we characterize the impact of zinc intoxication on S. pneumoniae, observing disruptions in central carbon metabolism, lipid biogenesis, and peptidoglycan biosynthesis. Characterization of the pivotal peptidoglycan biosynthetic enzyme GlmU indicates a sensitivity to zinc inhibition. Disruption of the sole zinc efflux pathway, czcD, renders S. pneumoniae highly susceptible to β-lactam antibiotics. To dysregulate zinc homeostasis in the wild-type strain, we investigated the safe-for-human-use ionophore 5,7-dichloro-2-[(dimethylamino)methyl]quinolin-8-ol (PBT2). PBT2 rendered wild-type S. pneumoniae strains sensitive to a range of antibiotics. Using an invasive ampicillin-resistant strain, we demonstrate in a murine pneumonia infection model the efficacy of PBT2 + ampicillin treatment. These findings present a therapeutic modality to break antibiotic resistance in multidrug-resistant S. pneumoniae.
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14
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Amikacin potentiator activity of zinc complexed to a pyrithione derivative with enhanced solubility. Sci Rep 2022; 12:285. [PMID: 34997203 PMCID: PMC8741805 DOI: 10.1038/s41598-021-04724-4] [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: 07/29/2021] [Accepted: 12/23/2021] [Indexed: 11/11/2022] Open
Abstract
Resistance to amikacin in Gram-negatives is usually mediated by the 6'-N-acetyltransferase type Ib [AAC(6')-Ib], which catalyzes the transfer of an acetyl group from acetyl CoA to the 6' position of the antibiotic molecule. A path to continue the effective use of amikacin against resistant infections is to combine it with inhibitors of the inactivating reaction. We have recently observed that addition of Zn2+ to in-vitro enzymatic reactions, obliterates acetylation of the acceptor antibiotic. Furthermore, when added to amikacin-containing culture medium in complex to ionophores such as pyrithione (ZnPT), it prevents the growth of resistant strains. An undesired property of ZnPT is its poor water-solubility, a problem that currently affects a large percentage of newly designed drugs. Water-solubility helps drugs to dissolve in body fluids and be transported to the target location. We tested a pyrithione derivative described previously (Magda et al. Cancer Res 68:5318–5325, 2008) that contains the amphoteric group di(ethyleneglycol)-methyl ether at position 5 (compound 5002), a modification that enhances the solubility. Compound 5002 in complex with zinc (Zn5002) was tested to assess growth inhibition of amikacin-resistant Acinetobacter baumannii and Klebsiella pneumoniae strains in the presence of the antibiotic. Zn5002 complexes in combination with amikacin at different concentrations completely inhibited growth of the tested strains. However, the concentrations needed to achieve growth inhibition were higher than those required to achieve the same results using ZnPT. Time-kill assays showed that the effect of the combination amikacin/Zn5002 was bactericidal. These results indicate that derivatives of pyrithione with enhanced water-solubility, a property that would make them drugs with better bioavailability and absorption, are a viable option for designing inhibitors of the resistance to amikacin mediated by AAC(6')-Ib, an enzyme commonly found in the clinics.
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15
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Zinc ionophores: chemistry and biological applications. J Inorg Biochem 2021; 228:111691. [PMID: 34929542 DOI: 10.1016/j.jinorgbio.2021.111691] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/01/2021] [Accepted: 12/03/2021] [Indexed: 02/06/2023]
Abstract
Zinc can play a pathophysiological role in several diseases and can interfere in key processes of microbial growth. This evidence justifies the efforts in applying Zinc ionophores to restore Zinc homeostasis and treat bacterial/viral infections such as coronavirus diseases. Zinc ionophores increase the intracellular concentration of Zinc ions causing significant biological effects. This review provides, for the first time, an overview of the applications of the main Zinc ionophores in Zinc deficiency, infectious diseases, and in cancer, discussing the pharmacological and coordination properties of the Zinc ionophores.
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16
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Kavanagh O, Elmes R, O’Sullivan F, Farragher J, Robinson S, Walker G. Investigating Structural Property Relationships to Enable Repurposing of Pharmaceuticals as Zinc Ionophores. Pharmaceutics 2021; 13:2032. [PMID: 34959313 PMCID: PMC8704213 DOI: 10.3390/pharmaceutics13122032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/17/2021] [Accepted: 11/22/2021] [Indexed: 12/12/2022] Open
Abstract
The importance of zinc in biology has gained greater recognition in recent years due to its essential contributions to the function of many endogenous enzymes. Disruption of zinc homeostasis may be useful in treating pathological conditions, such as Alzheimer's, and for antiviral purposes. Despite the growth of knowledge and increased interest in zinc, little is known about the structure and function of zinc ionophores. In this study we analyse the Cambridge Structural Database and solution complexation studies found in the literature to identify key functional groups which may confer zinc ionophorism. Pharmaceuticals, nutraceuticals and amino acids with these functionalities were selected to enable us to explore the translatability of ionophoric activity from in vitro assays to cellular systems. We find that although certain species may complex to zinc in the solid and solution states, and may carry ions across simple membrane systems, this does not necessarily translate into ionophoric activity. We propose that the CSD can help refine key functionalities but that ionophoric activity must be confirmed in cellular systems.
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Affiliation(s)
- Oisín Kavanagh
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- School of Pharmacy, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
- School of Chemical Sciences, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
- Department of Chemistry, Maynooth University, National University of Ireland, W23 F2H6 Maynooth, Ireland
- National Institute for Cellular Biotechnology, Dublin City University, D09 NR58 Dublin, Ireland
| | - Robert Elmes
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- Department of Chemistry, Maynooth University, National University of Ireland, W23 F2H6 Maynooth, Ireland
| | - Finbarr O’Sullivan
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- National Institute for Cellular Biotechnology, Dublin City University, D09 NR58 Dublin, Ireland
| | - John Farragher
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
| | - Shane Robinson
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- Janssen Pharmaceutical Sciences, T45 P663 Cork, Ireland
| | - Gavin Walker
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
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17
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Joaquim AR, Gionbelli MP, Gosmann G, Fuentefria AM, Lopes MS, Fernandes de Andrade S. Novel Antimicrobial 8-Hydroxyquinoline-Based Agents: Current Development, Structure-Activity Relationships, and Perspectives. J Med Chem 2021; 64:16349-16379. [PMID: 34779640 DOI: 10.1021/acs.jmedchem.1c01318] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The search for new antimicrobials is imperative due to the emergent resistance of new microorganism strains. In this context, revisiting known classes like 8-hydroxyquinolines could be an interesting strategy to discover new agents. The 8-hydroxyquinoline derivatives nitroxoline and clioquinol are used to treat microbial infections; however, these drugs are underused, being available in few countries or limited to topical use. After years of few advances, in the last two decades, the potent activity of clioquinol and nitroxoline against several targets and the privileged structure of 8-hydroxyquinoline nucleus have prompted an increased interest in the design of novel antimicrobial, anticancer, and anti-Alzheimer agents based on this class. Herein, we discuss the current development and antimicrobial structure-activity relationships of this class in the perspective of using the 8-hydroxyquinoline nucleus for the search for novel antimicrobial agents. Furthermore, the most investigated molecular targets concerning 8-hydroxyquinoline derivatives are explored in the final section.
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Affiliation(s)
- Angélica Rocha Joaquim
- Pharmaceutical Synthesis Group (PHARSG), Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil.,Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil
| | - Mariana Pies Gionbelli
- Pharmaceutical Synthesis Group (PHARSG), Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil.,Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil
| | - Grace Gosmann
- Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil
| | - Alexandre Meneghello Fuentefria
- Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil.,Programa de Pós-graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Sarmento Leite, 500, Farroupilha, Porto Alegre, RS 90050-170, Brazil
| | - Marcela Silva Lopes
- Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil
| | - Saulo Fernandes de Andrade
- Pharmaceutical Synthesis Group (PHARSG), Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil.,Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, Azenha, Porto Alegre, RS 90610-000, Brazil.,Programa de Pós-graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Sarmento Leite, 500, Farroupilha, Porto Alegre, RS 90050-170, Brazil
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18
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The antimicrobial and immunomodulatory effects of Ionophores for the treatment of human infection. J Inorg Biochem 2021; 227:111661. [PMID: 34896767 DOI: 10.1016/j.jinorgbio.2021.111661] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 12/18/2022]
Abstract
Ionophores are a diverse class of synthetic and naturally occurring ion transporter compounds which demonstrate both direct and in-direct antimicrobial properties against a broad panel of bacterial, fungal, viral and parasitic pathogens. In addition, ionophores can regulate the host-immune response during communicable and non-communicable disease states. Although the clinical use of ionophores such as Amphotericin B, Bedaquiline and Ivermectin highlight the utility of ionophores in modern medicine, for many other ionophore compounds issues surrounding toxicity, bioavailability or lack of in vivo efficacy studies have hindered clinical development. The antimicrobial and immunomodulating properties of a range of compounds with characteristics of ionophores remain largely unexplored. As such, ionophores remain a latent therapeutic avenue to address both the global burden of antimicrobial resistance, and the unmet clinical need for new antimicrobial therapies. This review will provide an overview of the broad-spectrum antimicrobial and immunomodulatory properties of ionophores, and their potential uses in clinical medicine for combatting infection.
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19
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Van Zuylen EM, Ferguson SA, Hughes A, Rennison D, Brimble MA, Cook GM. Disruption of Metallostasis in the Anaerobic Human Pathogen Fusobacterium nucleatum by the Zinc Ionophore PBT2. ACS Infect Dis 2021; 7:2285-2298. [PMID: 34259502 DOI: 10.1021/acsinfecdis.0c00887] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The Gram-negative anaerobe Fusobacterium nucleatum is an opportunistic human pathogen, most frequently associated with periodontal disease through dental biofilm formation and, increasingly, with colorectal cancer development and progression. F. nucleatum infections are routinely treated by broad-spectrum β-lactam antibiotics and metronidazole. However, these antibiotics can negatively impact the normal microflora. Therefore, the development of novel narrow-spectrum antimicrobials active against anaerobic pathogens is of great interest. Here, we examined the antimicrobial Zn ionophore PBT2, an 8-hydroxyquinoline analogue with metal chelating properties, against a single type isolate F. nucleatum ATCC 25586. PBT2-Zn was a potent inhibitor of growth and exhibited synergistic bactericidal (>3-log10 killing) activity at 5× MIC in planktonic cells, and at the MIC in biofilms grown in vitro. Physiological and transcriptional analyses uncovered a strong cellular response relating to Zn and Fe homeostasis in PBT2-Zn treated cells across subinhibitory and inhibitory concentrations. At 1× MIC, PBT2 alone induced a 3.75-fold increase in intracellular Zn, whereas PBT2-Zn challenge induced a 19-fold accumulation of intracellular Zn after 2 h. A corresponding 2.1-fold loss of Fe was observed at 1× MIC. Transcriptional analyses after subinhibitory PBT2-Zn challenge (0.125 μg/mL and 200 μM ZnSO4) revealed significant differential expression of 15 genes at 0.5 h, and 12 genes at 1 h. Upregulated genes included those with roles in Zn homeostasis (e.g., a Zn-transporting ATPase and the Zn-sensing transcriptional regulator, smtB) and hemin transport (hmuTUV) to re-establish Fe homeostasis. A concentration-dependent protective effect was observed for cells pretreated with hemin (50 μg/mL) prior to PBT2-Zn challenge. The data presented here supports our proposal that targeting the disruption of metallostasis by Zn-translocating ionophores is a strategy worth investigating further for the treatment of Gram-negative anaerobic pathogens.
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Affiliation(s)
- Essie M. Van Zuylen
- Department of Microbiology & Immunology, University of Otago, Dunedin, New Zealand, 9016
| | - Scott A. Ferguson
- Department of Microbiology & Immunology, University of Otago, Dunedin, New Zealand, 9016
| | - Alan Hughes
- Department of Microbiology & Immunology, University of Otago, Dunedin, New Zealand, 9016
| | - David Rennison
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand, 1010
| | - Margaret A. Brimble
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand, 1010
- Maurice Wilkins Centre for Molecular Biodiscovery, Auckland, New Zealand, 92019
| | - Gregory M. Cook
- Department of Microbiology & Immunology, University of Otago, Dunedin, New Zealand, 9016
- Maurice Wilkins Centre for Molecular Biodiscovery, Auckland, New Zealand, 92019
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20
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C-2 derivatized 8-sulfonamidoquinolines as antibacterial compounds. Bioorg Med Chem 2021; 29:115837. [PMID: 33223463 DOI: 10.1016/j.bmc.2020.115837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 11/22/2022]
Abstract
A series of C-2 derivatized 8-sulfonamidoquinolines were evaluated for their antibacterial activity against the common mastitis causative pathogens Streptococcus uberis, Staphylococcus aureus and Escherichia coli, both in the presence and absence of supplementary zinc (50 µM ZnSO4). The vast majority of compounds tested were demonstrated to be significantly more active against S. uberis when in the presence of supplementary zinc (MICs as low as 0.125 µg/mL were observed in the presence of 50 µM ZnSO4). Compounds 5, 34-36, 39, 58, 79, 82, 94 and 95 were shown to display the greatest antibacterial activity against S. aureus (MIC ≤ 8 µg/mL; both in the presence and absence of supplementary zinc), while compounds 56, 58 and 66 were demonstrated to also exhibit activity against E. coli (MIC ≤ 16 µg/mL; under all conditions). Compounds 56, 58 and 66 were subsequently confirmed to be bactericidal against all three mastitis pathogens studied, with MBCs (≥3log10 CFU/mL reduction) of ≤ 32 µg/mL (in both the presence and absence of 50 µM ZnSO4). To validate the sanitizing activity of compounds 56, 58 and 66, a quantitative suspension disinfection (sanitizer) test was performed. Sanitizing activity (>5log10 CFU/mL reduction in 5 min) was observed against both S. uberis and E. coli at compound concentrations as low as 1 mg/mL (compounds 56, 58 and 66), and against S. aureus at 1 mg/mL (compound 58); thereby validating the potential of compounds 56, 58 and 66 to function as topical sanitizers designed explicitly for use in non-human applications.
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21
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von Pein JB, Stocks CJ, Schembri MA, Kapetanovic R, Sweet MJ. An alloy of zinc and innate immunity: Galvanising host defence against infection. Cell Microbiol 2020; 23:e13268. [PMID: 32975847 DOI: 10.1111/cmi.13268] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/31/2020] [Accepted: 09/03/2020] [Indexed: 12/16/2022]
Abstract
Innate immune cells such as macrophages and neutrophils initiate protective inflammatory responses and engage antimicrobial responses to provide frontline defence against invading pathogens. These cells can both restrict the availability of certain transition metals that are essential for microbial growth and direct toxic concentrations of metals towards pathogens as antimicrobial responses. Zinc is important for the structure and function of many proteins, however excess zinc can be cytotoxic. In recent years, several studies have revealed that innate immune cells can deliver toxic concentrations of zinc to intracellular pathogens. In this review, we discuss the importance of zinc status during infectious disease and the evidence for zinc intoxication as an innate immune antimicrobial response. Evidence for pathogen subversion of this response is also examined. The likely mechanisms, including the involvement of specific zinc transporters that facilitate delivery of zinc by innate immune cells for metal ion poisoning of pathogens are also considered. Precise mechanisms by which excess levels of zinc can be toxic to microorganisms are then discussed, particularly in the context of synergy with other antimicrobial responses. Finally, we highlight key unanswered questions in this emerging field, which may offer new opportunities for exploiting innate immune responses for anti-infective development.
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Affiliation(s)
- Jessica B von Pein
- Institute for Molecular Bioscience (IMB), The University of Queensland, St. Lucia, Queensland, Australia.,IMB Centre for Inflammation and Disease Research, The University of Queensland, St. Lucia, Queensland, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, Queensland, Australia
| | - Claudia J Stocks
- Institute for Molecular Bioscience (IMB), The University of Queensland, St. Lucia, Queensland, Australia.,IMB Centre for Inflammation and Disease Research, The University of Queensland, St. Lucia, Queensland, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, Queensland, Australia
| | - Mark A Schembri
- Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, Queensland, Australia.,School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Queensland, Australia
| | - Ronan Kapetanovic
- Institute for Molecular Bioscience (IMB), The University of Queensland, St. Lucia, Queensland, Australia.,IMB Centre for Inflammation and Disease Research, The University of Queensland, St. Lucia, Queensland, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, Queensland, Australia
| | - Matthew J Sweet
- Institute for Molecular Bioscience (IMB), The University of Queensland, St. Lucia, Queensland, Australia.,IMB Centre for Inflammation and Disease Research, The University of Queensland, St. Lucia, Queensland, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, St. Lucia, Queensland, Australia
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22
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Hecel A, Ostrowska M, Stokowa-Sołtys K, Wątły J, Dudek D, Miller A, Potocki S, Matera-Witkiewicz A, Dominguez-Martin A, Kozłowski H, Rowińska-Żyrek M. Zinc(II)-The Overlooked Éminence Grise of Chloroquine's Fight against COVID-19? Pharmaceuticals (Basel) 2020; 13:E228. [PMID: 32882888 PMCID: PMC7558363 DOI: 10.3390/ph13090228] [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: 08/03/2020] [Revised: 08/28/2020] [Accepted: 08/29/2020] [Indexed: 12/24/2022] Open
Abstract
Zn(II) is an inhibitor of SARS-CoV-2's RNA-dependent RNA polymerase, and chloroquine and hydroxychloroquine are Zn(II) ionophores-this statement gives a curious mind a lot to think about. We show results of the first clinical trials on chloroquine (CQ) and hydroxychloroquine (HCQ) in the treatment of COVID-19, as well as earlier reports on the anticoronaviral properties of these two compounds and of Zn(II) itself. Other FDA-approved Zn(II) ionophores are given a decent amount of attention and are thought of as possible COVID-19 therapeutics.
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Affiliation(s)
- Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
| | - Małgorzata Ostrowska
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
| | - Kamila Stokowa-Sołtys
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
| | - Joanna Wątły
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
| | - Dorota Dudek
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
| | - Adriana Miller
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
| | - Sławomir Potocki
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
| | - Agnieszka Matera-Witkiewicz
- Screening Laboratory of Biological Activity Tests and Collection of Biological Material, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland;
| | - Alicia Dominguez-Martin
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, E-18071 Granada, Spain;
| | - Henryk Kozłowski
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
- Department of Physiotherapy, Opole Medical School, Katowicka 68, 40-060 Opole, Poland
| | - Magdalena Rowińska-Żyrek
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; (A.H.); (M.O.); (K.S.-S.); (J.W.); (D.D.); (A.M.); (S.P.); (H.K.)
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