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Abd-El-Aziz AS, Agatemor C, Etkin N, Overy DP, Kerr RG. Redox-active cationic organoiron complex: a promising lead structure for developing antimicrobial agents with activity against Gram-positive pathogens including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecium. RSC Adv 2015. [DOI: 10.1039/c5ra16613f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A redox-active, cationic organoiron complexes active against multidrug-resistant strain of Gram-positive bacteria is presented as a potential new lead structure for the design of antimicrobial agents.
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Affiliation(s)
- Alaa S. Abd-El-Aziz
- Department of Chemistry
- University of Prince Edward Island
- Charlottetown
- Canada
| | - Christian Agatemor
- Department of Chemistry
- University of Prince Edward Island
- Charlottetown
- Canada
| | - Nola Etkin
- Department of Chemistry
- University of Prince Edward Island
- Charlottetown
- Canada
| | - David P. Overy
- Department of Chemistry
- University of Prince Edward Island
- Charlottetown
- Canada
- Department of Pathology and Microbiology
| | - Russell G. Kerr
- Department of Chemistry
- University of Prince Edward Island
- Charlottetown
- Canada
- Department of Biomedical Science
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102
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Tripathy SK, Taviti AC, Dehury N, Sahoo A, Pal S, Beuria TK, Patra S. Synthesis, characterisation and antibacterial activity of [(p-cym)RuX(L)]+/2+ (X = Cl, H2O; L = bpmo, bpms) complexes. Dalton Trans 2015; 44:5114-24. [DOI: 10.1039/c4dt03647f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simple replacement of Cl− by H2O in {(p-cym)RuII(L)X]n+ (X = Cl or H2O) complexes enhances antibacterial activity significantly.
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Affiliation(s)
- Suman Kumar Tripathy
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
| | | | - Niranjan Dehury
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
| | - Anupam Sahoo
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
| | - Satyanaryan Pal
- Department of Chemistry
- Ravenshaw University
- Cuttack-753 003
- India
| | | | - Srikanta Patra
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
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103
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Dou Q, Fang X, Jiang S, Chee PL, Lee TC, Loh XJ. Multi-functional fluorescent carbon dots with antibacterial and gene delivery properties. RSC Adv 2015. [DOI: 10.1039/c5ra07968c] [Citation(s) in RCA: 221] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Dual-functionality carbon dots with both anti-microbial and gene transfection abilities were developed and their properties elaborated in this paper.
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Affiliation(s)
- Qingqing Dou
- Institute of Materials Research and Engineering
- A*STAR, (Agency for Science, Technology and Research)
- Singapore 117602
- Singapore
| | - Xiaotian Fang
- Institute of Materials Research and Engineering
- A*STAR, (Agency for Science, Technology and Research)
- Singapore 117602
- Singapore
| | - Shan Jiang
- Institute of Materials Research and Engineering
- A*STAR, (Agency for Science, Technology and Research)
- Singapore 117602
- Singapore
| | - Pei Lin Chee
- Institute of Materials Research and Engineering
- A*STAR, (Agency for Science, Technology and Research)
- Singapore 117602
- Singapore
| | - Tung-Chun Lee
- Institute for Materials Discovery
- University College London
- WC1E 6BT London
- UK
| | - Xian Jun Loh
- Institute of Materials Research and Engineering
- A*STAR, (Agency for Science, Technology and Research)
- Singapore 117602
- Singapore
- Department of Materials Science and Engineering
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104
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Patra M, Wenzel M, Prochnow P, Pierroz V, Gasser G, Bandow JE, Metzler-Nolte N. An organometallic structure-activity relationship study reveals the essential role of a Re(CO) 3 moiety in the activity against gram-positive pathogens including MRSA. Chem Sci 2014; 6:214-224. [PMID: 28553471 PMCID: PMC5433042 DOI: 10.1039/c4sc02709d] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 09/24/2014] [Indexed: 01/30/2023] Open
Abstract
A systematic structure activity relationship reveals the contribution of individual organometallic moieties to the potency of a new structural class of hetero-trimetallic antibacterial agents.
The worrying appearance of microbial resistance to antibiotics is a worldwide problem which needs to be tackled urgently. Microbial resistance to the common classes of antibiotics involving purely organic compounds unfortunately develops very rapidly and in most cases, resistance was detected soon after or even before release of the antibiotic to the market. Therefore, novel concepts for antibiotics must be investigated, and metal-containing compounds hold particular promise in that area. Taking a trimetallic complex (1a) which contains a ferrocenyl (Fc), a CpMn(CO)3 (cymantrene) and a [(dpa)Re(CO)3] residue as the lead structure, a systematic structure–activity relationship (SAR) study against various gram-positive pathogenic bacteria including methicillin-resistant Staphylococcus aureus (MRSA) strains was performed. The [(dpa)Re(CO)3] moiety was discovered to be the essential unit for the observed antibacterial activity of 1a. The ferrocenyl and CpMn(CO)3 units can be replaced one by one or both together by organic moieties such as a phenyl ring without loss of antibacterial activity. The most potent mono-metallic complex (9c′) has an antibacterial activity comparable to the well-established organic drugs amoxicillin and norfloxacin and importantly, only moderate cytotoxicity against mammalian cells. Microbiological studies on membrane potential, membrane permeabilization, and cell wall integrity revealed that 9c′ targets the bacterial membrane and disturbs cell wall integrity, but shows more efficient membrane permeabilization than the lead structure 1a.
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Affiliation(s)
- Malay Patra
- Lehrstuhl für Anorganische Chemie I - Bioanorganische Chemie , Fakultät für Chemie und Biochemie , Ruhr-Universität Bochum , Universitätsstrasse 150 , D-44801 Bochum , Germany .
| | - Michaela Wenzel
- Ruhr-Universität Bochum , Biologie der Mikroorganismen , Arbeitsgruppe Mikrobielle Antibiotikaforschung , Universitätsstrasse 150 , D-44801 Bochum , Germany . ; ; Tel: +49-234-32-23102
| | - Pascal Prochnow
- Ruhr-Universität Bochum , Biologie der Mikroorganismen , Arbeitsgruppe Mikrobielle Antibiotikaforschung , Universitätsstrasse 150 , D-44801 Bochum , Germany . ; ; Tel: +49-234-32-23102
| | - Vanessa Pierroz
- Department of Chemistry , University of Zurich , Winterthurerstrasse 190 , CH-8057 Zurich , Switzerland
| | - Gilles Gasser
- Department of Chemistry , University of Zurich , Winterthurerstrasse 190 , CH-8057 Zurich , Switzerland
| | - Julia E Bandow
- Ruhr-Universität Bochum , Biologie der Mikroorganismen , Arbeitsgruppe Mikrobielle Antibiotikaforschung , Universitätsstrasse 150 , D-44801 Bochum , Germany . ; ; Tel: +49-234-32-23102
| | - Nils Metzler-Nolte
- Lehrstuhl für Anorganische Chemie I - Bioanorganische Chemie , Fakultät für Chemie und Biochemie , Ruhr-Universität Bochum , Universitätsstrasse 150 , D-44801 Bochum , Germany .
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105
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Noor A, Huff GS, Kumar SV, Lewis JEM, Paterson BM, Schieber C, Donnelly PS, Brooks HJL, Gordon KC, Moratti SC, Crowley JD. [Re(CO)3]+ Complexes of exo-Functionalized Tridentate “Click” Macrocycles: Synthesis, Stability, Photophysical Properties, Bioconjugation, and Antibacterial Activity. Organometallics 2014. [DOI: 10.1021/om500664v] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | | | | | | | - Brett M. Paterson
- School of Chemistry and Bio21 Molecular Science Biotechnology Institute, University of Melbourne, Melbourne 3010, Australia
| | - Christine Schieber
- School of Chemistry and Bio21 Molecular Science Biotechnology Institute, University of Melbourne, Melbourne 3010, Australia
| | - Paul S. Donnelly
- School of Chemistry and Bio21 Molecular Science Biotechnology Institute, University of Melbourne, Melbourne 3010, Australia
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106
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Bacterial cell division proteins as antibiotic targets. Bioorg Chem 2014; 55:27-38. [PMID: 24755375 DOI: 10.1016/j.bioorg.2014.03.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 03/20/2014] [Accepted: 03/24/2014] [Indexed: 11/21/2022]
Abstract
Proteins involved in bacterial cell division often do not have a counterpart in eukaryotic cells and they are essential for the survival of the bacteria. The genetic accessibility of many bacterial species in combination with the Green Fluorescence Protein revolution to study localization of proteins and the availability of crystal structures has increased our knowledge on bacterial cell division considerably in this century. Consequently, bacterial cell division proteins are more and more recognized as potential new antibiotic targets. An international effort to find small molecules that inhibit the cell division initiating protein FtsZ has yielded many compounds of which some are promising as leads for preclinical use. The essential transglycosylase activity of peptidoglycan synthases has recently become accessible to inhibitor screening. Enzymatic assays for and structural information on essential integral membrane proteins such as MraY and FtsW involved in lipid II (the peptidoglycan building block precursor) biosynthesis have put these proteins on the list of potential new targets. This review summarises and discusses the results and approaches to the development of lead compounds that inhibit bacterial cell division.
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107
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Münch D, Müller A, Schneider T, Kohl B, Wenzel M, Bandow JE, Maffioli S, Sosio M, Donadio S, Wimmer R, Sahl HG. The lantibiotic NAI-107 binds to bactoprenol-bound cell wall precursors and impairs membrane functions. J Biol Chem 2014; 289:12063-12076. [PMID: 24627484 DOI: 10.1074/jbc.m113.537449] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The lantibiotic NAI-107 is active against Gram-positive bacteria including vancomycin-resistant enterococci and methicillin-resistant Staphylococcus aureus. To identify the molecular basis of its potency, we studied the mode of action in a series of whole cell and in vitro assays and analyzed structural features by nuclear magnetic resonance (NMR). The lantibiotic efficiently interfered with late stages of cell wall biosynthesis and induced accumulation of the soluble peptidoglycan precursor UDP-N-acetylmuramic acid-pentapeptide (UDP-MurNAc-pentapeptide) in the cytoplasm. Using membrane preparations and a complete cascade of purified, recombinant late stage peptidoglycan biosynthetic enzymes (MraY, MurG, FemX, PBP2) and their respective purified substrates, we showed that NAI-107 forms complexes with bactoprenol-pyrophosphate-coupled precursors of the bacterial cell wall. Titration experiments indicate that first a 1:1 stoichiometric complex occurs, which then transforms into a 2:1 (peptide: lipid II) complex, when excess peptide is added. Furthermore, lipid II and related molecules obviously could not serve as anchor molecules for the formation of defined and stable nisin-like pores, however, slow membrane depolarization was observed after NAI-107 treatment, which could contribute to killing of the bacterial cell.
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Affiliation(s)
- Daniela Münch
- Institute of Medical Microbiology, Immunology and Parasitology, Pharmaceutical Microbiology Section, University of Bonn, 53115 Bonn, Germany.
| | - Anna Müller
- Institute of Medical Microbiology, Immunology and Parasitology, Pharmaceutical Microbiology Section, University of Bonn, 53115 Bonn, Germany
| | - Tanja Schneider
- Institute of Medical Microbiology, Immunology and Parasitology, Pharmaceutical Microbiology Section, University of Bonn, 53115 Bonn, Germany
| | - Bastian Kohl
- Department of Biology of Microorganisms, Ruhr University Bochum, 44780 Bochum, Germany
| | - Michaela Wenzel
- Department of Biology of Microorganisms, Ruhr University Bochum, 44780 Bochum, Germany
| | | | | | | | | | - Reinhard Wimmer
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, 9000 Aalborg, Denmark
| | - Hans-Georg Sahl
- Institute of Medical Microbiology, Immunology and Parasitology, Pharmaceutical Microbiology Section, University of Bonn, 53115 Bonn, Germany.
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