1
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Kunkle DE, Skaar EP. Moving metals: How microbes deliver metal cofactors to metalloproteins. Mol Microbiol 2023; 120:547-554. [PMID: 37408317 PMCID: PMC10592388 DOI: 10.1111/mmi.15117] [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: 02/13/2023] [Revised: 06/08/2023] [Accepted: 06/13/2023] [Indexed: 07/07/2023]
Abstract
First row d-block metal ions serve as vital cofactors for numerous essential enzymes and are therefore required nutrients for all forms of life. Despite this requirement, excess free transition metals are toxic. Free metal ions participate in the production of noxious reactive oxygen species and mis-metalate metalloproteins, rendering enzymes catalytically inactive. Thus, bacteria require systems to ensure metalloproteins are properly loaded with cognate metal ions to maintain protein function, while avoiding metal-mediated cellular toxicity. In this perspective we summarize the current mechanistic understanding of bacterial metallocenter maturation with specific emphasis on metallochaperones; a group of specialized proteins that both shield metal ions from inadvertent reactions and distribute them to cognate target metalloproteins. We highlight several recent advances in the field that have implicated new classes of proteins in the distribution of metal ions within bacterial proteins, while speculating on the future of the field of bacterial metallobiology.
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Affiliation(s)
- Dillon E. Kunkle
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Eric P. Skaar
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN, USA
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2
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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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3
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Andrews RM, Bollar GE, Giattina AS, Dalecki AG, Wallace Jr JR, Frantz L, Eschliman K, Covarrubias-Zambrano O, Keith JD, Duverger A, Wagner F, Wolschendorf F, Bossmann SH, Birket SE, Kutsch O. Repurposing sunscreen as an antibiotic: zinc-activated avobenzone inhibits methicillin-resistant Staphylococcus aureus. Metallomics 2023; 15:mfad049. [PMID: 37653446 PMCID: PMC10478290 DOI: 10.1093/mtomcs/mfad049] [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: 10/17/2022] [Accepted: 06/05/2023] [Indexed: 09/02/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a major healthcare concern with associated healthcare costs reaching over ${\$}$1 billion in a single year in the USA. Antibiotic resistance in S. aureus is now observed against last line of defense antibiotics, such as vancomycin, linezolid, and daptomycin. Unfortunately, high throughput drug discovery approaches to identify new antibiotics effective against MRSA have not resulted in much tangible success over the last decades. Previously, we demonstrated the feasibility of an alternative drug discovery approach, the identification of metallo-antibiotics, compounds that gain antibacterial activity only after binding to a transition metal ion and as such are unlikely to be detected in standard drug screens. We now report that avobenzone, the primary active ingredient of most sunscreens, can be activated by zinc to become a potent antibacterial compound against MRSA. Zinc-activated avobenzone (AVB-Zn) potently inhibited a series of clinical MRSA isolates [minimal inhibitory concentration (MIC): 0.62-2.5 µM], without pre-existing resistance and activity without zinc (MIC: >10 µM). AVB-Zn was also active against clinical MRSA isolates that were resistant against the commonly used zinc-salt antibiotic bacitracin. We found AVB-Zn exerted no cytotoxicity on human cell lines and primary cells. Last, we demonstrate AVB-Zn can be deployed therapeutically as lotion preparations, which showed efficacy in a mouse wound model of MRSA infection. AVB-Zn thus demonstrates Zn-activated metallo-antibiotics are a promising avenue for future drug discovery.
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Affiliation(s)
- Rachel M Andrews
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Gretchen E Bollar
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - A Sophia Giattina
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Alex G Dalecki
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - John R Wallace Jr
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Leah Frantz
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kayla Eschliman
- Department of Chemistry, Kansas State University, Kansas City, KS, USA
| | - Obdulia Covarrubias-Zambrano
- Department of Chemistry, Kansas State University, Kansas City, KS, USA
- Department of Cancer Biology, The University of Kansas Medical Center, Kansas City, KS, USA
| | - Johnathan D Keith
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Alexandra Duverger
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Frederic Wagner
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Frank Wolschendorf
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stefan H Bossmann
- Department of Chemistry, Kansas State University, Kansas City, KS, USA
- Department of Cancer Biology, The University of Kansas Medical Center, Kansas City, KS, USA
| | - Susan E Birket
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Olaf Kutsch
- School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
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4
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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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5
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Ramírez-Hernández M, Norambuena J, Hu H, Thomas B, Tang C, Boyd JM, Asefa T. Repurposing Anthelmintics: Rafoxanide- and Copper-Functionalized SBA-15 Carriers against Methicillin-Resistant Staphylococcus aureus. ACS APPLIED MATERIALS & INTERFACES 2023; 15:17459-17469. [PMID: 36975176 DOI: 10.1021/acsami.2c19899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The development of materials that can more efficiently administer antimicrobial agents in a controlled manner is urgently needed due to the rise in microbial resistance to traditional antibiotics. While new classes of antibiotics are developed and put into widespread usage, existing, inexpensive compounds can be repurposed to fight bacterial infections. Here, we present the synthesis of amine-functionalized SBA-15 mesoporous silica nanomaterials with physisorbed rafoxanide (RFX), a commonly used salicylanilide anthelmintic, and anchored Cu(II) ions that exhibit enhanced antimicrobial efficacy against the pathogenic bacterium Staphylococcus aureus. The synthesized nanomaterials are structurally characterized by a combination of physicochemical, thermal, and optical methods. Additionally, release studies are carried out in vitro to determine the effects of pH and the synthetic sequence used to produce the materials on Cu(II) ion release. Our results indicate that SBA-15 mesoporous silica nanocarriers loaded with Cu(II) and RFX exhibit 10 times as much bactericidal action against wild-type S. aureus as the nanocarrier loaded with only RFX. Furthermore, the synthetic sequence used to produce the nanomaterials could significantly affect (enhance) their bactericidal efficacy.
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Affiliation(s)
- Maricely Ramírez-Hernández
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
| | - Javiera Norambuena
- Department of Biochemistry and Microbiology, Rutgers, The State University of New Jersey, 76 Lipman Drive, New Brunswick, New Jersey 08901, United States
| | - Hongnan Hu
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
| | - Belvin Thomas
- Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Chaoyun Tang
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
- Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
- Hoffman Institute of Advanced Materials, Shenzhen Polytechnic, 7098 Liuxian Boulevard, Shenzhen 518060, China
| | - Jeffrey M Boyd
- Department of Biochemistry and Microbiology, Rutgers, The State University of New Jersey, 76 Lipman Drive, New Brunswick, New Jersey 08901, United States
| | - Tewodros Asefa
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
- Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
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6
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Hassan A, AL-Salmi FA, Saleh MA, Sabatier JM, Alatawi FA, Alenezi MA, Albalwe FM, Meteq R. Albalawi H, Darwish DBE, Sharaf EM. Inhibition Mechanism of Methicillin-Resistant Staphylococcus aureus by Zinc Oxide Nanorods via Suppresses Penicillin-Binding Protein 2a. ACS OMEGA 2023; 8:9969-9977. [PMID: 36969461 PMCID: PMC10034842 DOI: 10.1021/acsomega.2c07142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) causes life-threatening infections. Zinc oxide is well known as an effective antibacterial drug against many bacterial strains. We investigated the performance of zinc oxide nanorods synthesized by Albmiun as a biotemplate as an antibacterial drug in this study; the fabrication of zinc oxide nanorods was synthesized by sol-gel methods. We performed physicochemical characterization of zinc oxide nanorods by physiochemical techniques such as FTIR spectroscopy, X-ray diffraction, and TEM and investigation of their antimicrobial toxicity efficiency by MIC, ATPase activity assay, anti-biofilm activity, and kill time assays, as well as the mecA, mecR1, blaR1, blaZ, and biofilm genes (ica A, ica D, and fnb A) by using a quantitative RT-PCR assay and the penicillin-binding protein 2a (PBP2a) level of MRSA by using a Western blot. The data confirmed the fabrication of rod-shaped zinc oxide nanorods with a diameter in the range of 50 nm, which emphasized the formation of zinc oxide nanoparticles with regular shapes. The results show that zinc oxide nanorods inhibited methicillin-resistant S. aureus effectively. The MIC value was 23 μg/mL. The time kill of ZnO-NRs against MRSA was achieved after 2 h of incubation at 4MIC (92 μg/mL) and after 3 h of incubation at 2MIC (46 μg/mL), respectively. The lowest concentration of zinc oxide nanorods with over 75% biofilm killing in all strains tested was 32 μg/mL. Also, we examined the influence of the zinc oxide nanorods on MRSA by analyzing mecA, mecR1, blaR1, and blaZ by using a quantitative RT-PCR assay. The data obtained revealed that the presence of 2× MIC (46 μg/mL) of ZnO-NRs reduced the transcriptional levels of blaZ, blaR1, mecA, and mecR1 by 3.4-fold, 3.6-fold, 4-fold, and 3.8-fold, respectively. Furthermore, the gene expression of biofilm encoding genes (ica A, ica B, ica D, and fnb A) was tested using quantitative real-time reverse transcriptase-polymerase chain reaction (rt-PCR). The results showed that the presence of 2× MIC (46 μg/mL) of ZnO-NRs reduced the transcriptional levels of ica A, ica B, ica D, and fnb A. Also, the PBP2a level was markedly reduced after treatment with ZnO-NRs.
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Affiliation(s)
- Amr Hassan
- Department
of Bioinformatics, Genetic Engineering and Biotechnology Research
Institute (GEBRI), University of Sadat City, Sadat 32897, Egypt
| | - Fawziah A. AL-Salmi
- Department
of Biology, Faculty of Sciences, Taif University, Taif 21944, Saudi Arabia
| | - Muneera A. Saleh
- Department
of Biology, Faculty of Sciences, Taif University, Taif 21944, Saudi Arabia
| | - Jean-Marc Sabatier
- Institute
de Neurophysiopathologie (INP), Aix-Marseille
Université, Marseille 13005, France
| | - Fuad A. Alatawi
- Department
of Biology, Faculty of Science, University
of Tabuk, Tabuk 71421, Saudi Arabia
| | | | - Fauzeya M. Albalwe
- Department
of Biology, Faculty of Science, University
of Tabuk, Tabuk 71421, Saudi Arabia
| | | | - Doaa Bahaa Eldin Darwish
- Department
of Biology, Faculty of Science, University
of Tabuk, Tabuk 71421, Saudi Arabia
- Botany Department,
Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Eman M. Sharaf
- Department
of Bacteriology, Immunology, and Mycology, Animal Health Research Institute (AHRI), Shebin El Kom 11564, Egypt
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7
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Pereira AL, Vasconcelos MA, Andrade AL, Martins IM, Holanda AKM, Gondim ACS, Penha DPS, Bruno KL, Silva FON, Teixeira EH. Antimicrobial and Antibiofilm Activity of Copper-Based Metallic Compounds Against Bacteria Related with Healthcare-Associated Infections. Curr Microbiol 2023; 80:133. [PMID: 36897421 DOI: 10.1007/s00284-023-03232-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 02/15/2023] [Indexed: 03/11/2023]
Abstract
Health care-associated infections (HAIs) contribute to a significant rate of morbidity, mortality, and financial burden on health systems. These infections are caused by multidrug-resistant bacteria that produce biofilm as the main virulence factor. This study aimed to evaluate the effect of the copper-based metallic compounds [Cu(phen)(pz)NO2]Cl (I), [Cu(bpy)(pz)(NO2)]Cl (II), and [Cu(phen)(INA)NO2]Cl (III), where phen = phenanthroline, bpy = bipyridine, pz = pyrazinamide, and INA = isonicotinic acid, against planktonic cells and biofilms formation of Staphylococcus aureus, Staphylococcus epidermidis, and Escherichia coli. The susceptibility of the microorganisms was evaluated by minimum inhibitory concentration (MIC), minimum bacterial concentration (MBC), and time-kill curve assay on planktonic cells. The biofilm formation was evaluated by biomass quantification through staining with crystal violet (CV), colony-forming units (CFUs) quantification, and biofilm metabolic activity determination by XTT assay. The compounds showed bacteriostatic and bactericidal activity on all microorganisms analyzed. Regarding the antibiofilm activity, all metallic compounds were able to reduce significantly the biofilm biomass, colony-forming units, and the metabolic activity of remaining cells, varying the efficient concentration according to the strain analyzed. Interestingly, compounds (I), (II) and (III) did not exhibit DNA degradation activity even with up to 100 µM of these metal complexes. On the other hand, complexes (I) and (III) showed a remarkable capacity to cleave DNA upon addition of glutathione, a reducing agent (CuII/CuI) that leads to reactive oxygen species (ROS) formation. The results presented in this study showed promising antimicrobial and antibiofilm effects.
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Affiliation(s)
- Anna L Pereira
- Laboratório Integrado de Biomoléculas, Departamento de Patologia E Medicina Legal, Universidade Federal Do Ceará, CEP, 60430-270, Fortaleza - CE, Brasil
| | - Mayron A Vasconcelos
- Laboratório Integrado de Biomoléculas, Departamento de Patologia E Medicina Legal, Universidade Federal Do Ceará, CEP, 60430-270, Fortaleza - CE, Brasil.,Universidade Do Estado de Minas Gerais, Unidade Divinópolis, Divinópolis, MG, 35501-179, Brasil.,Faculdade de Ciências Exatas E Naturais, Universidade Do Estado Do Rio Grande Do Norte, 59610-090, Mossoró, RN, Brasil
| | - Alexandre L Andrade
- Laboratório Integrado de Biomoléculas, Departamento de Patologia E Medicina Legal, Universidade Federal Do Ceará, CEP, 60430-270, Fortaleza - CE, Brasil
| | - Israel M Martins
- Laboratório Integrado de Biomoléculas, Departamento de Patologia E Medicina Legal, Universidade Federal Do Ceará, CEP, 60430-270, Fortaleza - CE, Brasil
| | - Alda K M Holanda
- Laboratório de Bioinorgânica, Departamento de Química Orgânica E Inorgânica, Universidade Federal Do Ceará, Campus Do PICI S/N, PO Box 12200, 60440-900, Fortaleza - CE, Brasil
| | - Ana C S Gondim
- Laboratório de Bioinorgânica, Departamento de Química Orgânica E Inorgânica, Universidade Federal Do Ceará, Campus Do PICI S/N, PO Box 12200, 60440-900, Fortaleza - CE, Brasil
| | - Dayana P S Penha
- Laboratório de Química de Coordenação E Polímeros (LQCpol). Instituto de Química, Universidade Federal Do Rio Grande Do Norte, 59012-570, Natal, Brasil
| | - Katherine L Bruno
- Laboratório de Química de Coordenação E Polímeros (LQCpol). Instituto de Química, Universidade Federal Do Rio Grande Do Norte, 59012-570, Natal, Brasil
| | - Francisco O N Silva
- Laboratório de Química de Coordenação E Polímeros (LQCpol). Instituto de Química, Universidade Federal Do Rio Grande Do Norte, 59012-570, Natal, Brasil
| | - Edson H Teixeira
- Laboratório Integrado de Biomoléculas, Departamento de Patologia E Medicina Legal, Universidade Federal Do Ceará, CEP, 60430-270, Fortaleza - CE, Brasil.
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8
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Shome S, Talukdar AD, Upadhyaya H. Antibacterial activity of curcumin and its essential nanoformulations against some clinically important bacterial pathogens: A comprehensive review. Biotechnol Appl Biochem 2022; 69:2357-2386. [PMID: 34826356 DOI: 10.1002/bab.2289] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 11/22/2021] [Indexed: 12/27/2022]
Abstract
Multidrug-resistant bacterial infections can kill 700,000 individuals globally each year and is considered among the top 10 global health threats faced by humanity as the arsenal of antibiotics is becoming dry and alternate antibacterial molecule is in demand. Nanoparticles of curcumin exhibit appreciable broad-spectrum antibacterial activity using unique and novel mechanisms and thus the process deserves to be reviewed and further researched to clearly understand the mechanisms. Based on the antibiotic resistance, infection, and virulence potential, a list of clinically important bacteria was prepared after extensive literature survey and all recent reports on the antibacterial activity of curcumin and its nanoformulations as well as their mechanism of antibacterial action have been reviewed. Curcumin, nanocurcumin, and its nanocomposites with improved aqueous solubility and bioavailability are very potential, reliable, safe, and sustainable antibacterial molecule against clinically important bacterial species that uses multitarget mechanism such as inactivation of antioxidant enzyme, reactive oxygen species-mediated cellular damage, and inhibition of acyl-homoserine-lactone synthase necessary for quorum sensing and biofilm formation, thereby bypassing the mechanisms of bacterial antibiotic resistance. Nanoformulations of curcumin can thus be considered as a potential and sustainable antibacterial drug candidate to address the issue of antibiotic resistance.
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Affiliation(s)
- Soumitra Shome
- Ethnobotany and Medicinal Plants Research Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India
| | - Anupam Das Talukdar
- Ethnobotany and Medicinal Plants Research Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India
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9
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Boyd SM, Rhinehardt KL, Ewunkem AJ, Harrison SH, Thomas MD, Graves JL. Experimental Evolution of Copper Resistance in Escherichia coli Produces Evolutionary Trade-Offs in the Antibiotics Chloramphenicol, Bacitracin, and Sulfonamide. Antibiotics (Basel) 2022; 11:antibiotics11060711. [PMID: 35740118 PMCID: PMC9219993 DOI: 10.3390/antibiotics11060711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/21/2022] [Accepted: 05/22/2022] [Indexed: 02/01/2023] Open
Abstract
The rise in antimicrobial resistant bacteria have prompted the need for antibiotic alternatives. To address this problem, significant attention has been given to the antimicrobial use and novel applications of copper. As novel applications of antimicrobial copper increase, it is important to investigate how bacteria may adapt to copper over time. Here, we used experimental evolution with re-sequencing (EER-seq) and RNA-sequencing to study the evolution of copper resistance in Escherichia coli. Subsequently, we tested whether copper resistance led to rifampicin, chloramphenicol, bacitracin, and/or sulfonamide resistance. Our results demonstrate that E. coli is capable of rapidly evolving resistance to CuSO4 after 37 days of selection. We also identified multiple de novo mutations and differential gene expression patterns associated with copper, most notably those mutations identified in the cpx gene. Furthermore, we found that the copper resistant bacteria had decreased sensitivity when compared to the ancestors in the presence of chloramphenicol, bacitracin, and sulfonamide. Our data suggest that the selection of copper resistance may inhibit growth in the antimicrobials tested, resulting in evolutionary trade-offs. The results of our study may have important implications as we consider the antimicrobial use of copper and how bacteria may respond to increased use over time.
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Affiliation(s)
- Sada M. Boyd
- Department of Ecology and Evolutionary Biology, University of California, 612 Charles E. Young Drive South, Los Angeles, CA 90095, USA
- Correspondence:
| | - Kristen L. Rhinehardt
- Department of Computational Data Science and Engineering, North Carolina Agricultural and Technical State University, 1601 E. Market Street, Greensboro, NC 27411, USA;
| | - Akamu J. Ewunkem
- Department of Biological Sciences, Winston Salem State University, 601 S. Martin Luther King Jr. Drive, Win-ston-Salem, NC 27110, USA;
| | - Scott H. Harrison
- Department of Biology, North Carolina Agricultural and Technical State University, 1601 E. Market Street, Greensboro, NC 27411, USA; (S.H.H.); (M.D.T.); (J.L.G.J.)
| | - Misty D. Thomas
- Department of Biology, North Carolina Agricultural and Technical State University, 1601 E. Market Street, Greensboro, NC 27411, USA; (S.H.H.); (M.D.T.); (J.L.G.J.)
| | - Joseph L. Graves
- Department of Biology, North Carolina Agricultural and Technical State University, 1601 E. Market Street, Greensboro, NC 27411, USA; (S.H.H.); (M.D.T.); (J.L.G.J.)
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10
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Application of synergistic β-lactamase inhibitors and antibiotics in the treatment of wounds infected by superbugs. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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11
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Durand A, Fouesnard M, Bourbon ML, Steunou AS, Lojou E, Dorlet P, Ouchane S. A periplasmic cupredoxin with a green CuT1.5 center is involved in bacterial copper tolerance. Metallomics 2021; 13:6428408. [PMID: 34791351 DOI: 10.1093/mtomcs/mfab067] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 11/05/2021] [Indexed: 12/26/2022]
Abstract
The importance of copper resistance pathways in pathogenic bacteria is now well recognized, since macrophages use copper to fight bacterial infections. Additionally, considering the increase of antibiotic resistance, growing attention is given to the antimicrobial properties of copper. It is of primary importance to understand how bacteria deal with copper. The Cu-resistant cuproprotein CopI is present in many human bacterial pathogens and environmental bacteria and crucial under microaerobiosis (conditions for most pathogens to thrive within their host). Hence, understanding its mechanism of function is essential. CopI proteins share conserved histidine, cysteine, and methionine residues that could be ligands for different copper binding sites, among which the cupredoxin center could be involved in the protein function. Here, we demonstrated that Vibrio cholerae and Pseudomonas aeruginosa CopI restore the Cu-resistant phenotype in the Rubrivivax gelatinosus ΔcopI mutant. We identified that Cys125 (ligand in the cupredoxin center) and conserved histidines and methionines are essential for R. gelatinosus CopI (RgCopI) function. We also performed spectroscopic analyses of the purified RgCopI protein and showed that it is a green cupredoxin able to bind a maximum of three Cu(II) ions: (i) a green Cu site (CuT1.5), (ii) a type 2 Cu binding site (T2) located in the N-terminal region, and (iii) a third site with a yet unidentified location. CopI is therefore one member of the poorly described CuT1.5 center cupredoxin family. It is unique, since it is a single-domain cupredoxin with more than one Cu site involved in Cu resistance.
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Affiliation(s)
- Anne Durand
- CEA, CNRS, Université Paris-Saclay, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Mélanie Fouesnard
- CEA, CNRS, Université Paris-Saclay, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Marie-Line Bourbon
- CEA, CNRS, Université Paris-Saclay, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Anne-Soisig Steunou
- CEA, CNRS, Université Paris-Saclay, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | | | - Pierre Dorlet
- CNRS, Aix-Marseille Université, BIP, IMM, Marseille, France
| | - Soufian Ouchane
- CEA, CNRS, Université Paris-Saclay, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
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Wang S, Kim MC, Kang OH, Kwon DY. The Mechanism of Bisdemethoxycurcumin Enhances Conventional Antibiotics against Methicillin-Resistant Staphylococcus aureus. Int J Mol Sci 2020; 21:ijms21217945. [PMID: 33114703 PMCID: PMC7662602 DOI: 10.3390/ijms21217945] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/06/2020] [Accepted: 10/24/2020] [Indexed: 01/23/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) infection has posed a serious threat to public health, therefore, the development of new antibacterial drugs is imperative. Bisdemethoxycurcumin (BDMC) is a curcumin analog that exists in nature and possesses extensive pharmacological actions. This review focuses on investigating the antibacterial activity of BDMC alone or in combination with three antibiotics against MRSA. We determined the minimal inhibitory concentration of BDMC, with a broth microdilution assay, and the value against all six strains was 7.8 μg/mL. The synergistic effect of BDMC combined with the antibiotics was determined using a checkerboard dilution test and a time–kill curve assay. The results showed that the antimicrobial effect of BDMC combined with antibiotics was superior to treatment with that of a single agent alone. We examined the antibacterial activity of BDMC in the presence of a membrane-permeabilizing agent and an ATPase-inhibiting agent, respectively. In addition, we analyzed the mecA transcription gene and the penicillin-binding protein 2a (PBP2a) level of MRSA treated with BDMC by quantitative RT-PCR or Western blot assay. The gene transcription and the protein level were significantly inhibited. This study demonstrated that BDMC has potent antibacterial activity, and proved that BDMC may be a potential natural modulator of antibiotics.
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