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Shein AMS, Hongsing P, Smith OK, Phattharapornjaroen P, Miyanaga K, Cui L, Ishikawa H, Amarasiri M, Monk PN, Kicic A, Chatsuwan T, Pletzer D, Higgins PG, Abe S, Wannigama DL. Current and novel therapies for management of Acinetobacter baumannii-associated pneumonia. Crit Rev Microbiol 2024:1-22. [PMID: 38949254 DOI: 10.1080/1040841x.2024.2369948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 06/11/2024] [Indexed: 07/02/2024]
Abstract
Acinetobacter baumannii is a common pathogen associated with hospital-acquired pneumonia showing increased resistance to carbapenem and colistin antibiotics nowadays. Infections with A. baumannii cause high patient fatalities due to their capability to evade current antimicrobial therapies, emphasizing the urgency of developing viable therapeutics to treat A. baumannii-associated pneumonia. In this review, we explore current and novel therapeutic options for overcoming therapeutic failure when dealing with A. baumannii-associated pneumonia. Among them, antibiotic combination therapy administering several drugs simultaneously or alternately, is one promising approach for optimizing therapeutic success. However, it has been associated with inconsistent and inconclusive therapeutic outcomes across different studies. Therefore, it is critical to undertake additional clinical trials to ascertain the clinical effectiveness of different antibiotic combinations. We also discuss the prospective roles of novel antimicrobial therapies including antimicrobial peptides, bacteriophage-based therapy, repurposed drugs, naturally-occurring compounds, nanoparticle-based therapy, anti-virulence strategies, immunotherapy, photodynamic and sonodynamic therapy, for utilizing them as additional alternative therapy while tackling A. baumannii-associated pneumonia. Importantly, these innovative therapies further require pharmacokinetic and pharmacodynamic evaluation for safety, stability, immunogenicity, toxicity, and tolerability before they can be clinically approved as an alternative rescue therapy for A. baumannii-associated pulmonary infections.
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Affiliation(s)
- Aye Mya Sithu Shein
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Center of Excellence in, Antimicrobial Resistance and Stewardship Research, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Parichart Hongsing
- Mae Fah Luang University Hospital, Chiang Rai, Thailand
- School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, Thailand
| | - O'Rorke Kevin Smith
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Phatthranit Phattharapornjaroen
- Department of Emergency Medicine, Center of Excellence, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
- Department of Surgery, Sahlgrenska Academy, Institute of Clinical Sciences, Gothenburg University, Gothenburg, Sweden
| | - Kazuhiko Miyanaga
- Division of Bacteriology, School of Medicine, Jichi Medical University, Tochigi, Japan
| | - Longzhu Cui
- Division of Bacteriology, School of Medicine, Jichi Medical University, Tochigi, Japan
| | - Hitoshi Ishikawa
- Yamagata Prefectural University of Health Sciences, Kamiyanagi, Japan
| | - Mohan Amarasiri
- Laboratory of Environmental Hygiene, Department of Health Science, School of Allied Health Sciences, Kitasato University, Kitasato, Sagamihara-Minami, Japan
| | - Peter N Monk
- Department of Infection, Immunity & Cardiovascular Disease, University of Sheffield Medical School, UK
| | - Anthony Kicic
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Nedlands, Western Australia, Australia
- Centre for Cell Therapy and Regenerative Medicine, Medical School, The University of Western Australia, Nedlands, Western Australia, Australia
- Department of Respiratory and Sleep Medicine, Perth Children's Hospital, Nedlands, Western Australia, Australia
- School of Population Health, Curtin University, Bentley, Western Australia, Australia
| | - Tanittha Chatsuwan
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Center of Excellence in, Antimicrobial Resistance and Stewardship Research, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Daniel Pletzer
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Paul G Higgins
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
- German Centre for Infection Research, Partner site Bonn-Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Shuichi Abe
- Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
| | - Dhammika Leshan Wannigama
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Center of Excellence in, Antimicrobial Resistance and Stewardship Research, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
- School of Medicine, Faculty of Health and Medical Sciences, The University of Western Australia, Nedlands, Western Australia, Australia
- Biofilms and Antimicrobial Resistance Consortium of ODA receiving countries, The University of Sheffield, Sheffield, UK
- Pathogen Hunter's Research Team, Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
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2
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Kim T, Choi SY, Bae HW, Kim HS, Jeon H, Oh H, Ahn SH, Lee J, Suh YG, Cho YH, Kim SH. Design, synthesis, and evaluation of N 1,N 3-dialkyldioxonaphthoimidazoliums as antibacterial agents against methicillin-resistant Staphylococcus aureus. Eur J Med Chem 2024; 272:116454. [PMID: 38704937 DOI: 10.1016/j.ejmech.2024.116454] [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: 02/20/2024] [Revised: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 05/07/2024]
Abstract
Increasing antibiotic resistance of bacterial pathogens poses a serious threat to human health worldwide. Methicillin-resistant Staphylococcus aureus (MRSA) is among the most deleterious bacterial pathogens owing to its multidrug resistance, necessitating the development of new antibacterial agents against it. We previously identified a novel dioxonaphthoimidazolium agent, c5, with moderate antibacterial activity against MRSA from an anticancer clinical candidate, YM155. In this study, we aimed to design and synthesize several novel cationic amphiphilic N1,N3-dialkyldioxonaphthoimidazolium bromides with enhanced lipophilicity of the two side chains in the imidazolium scaffold and improved antibacterial activities compared to those of c5 against gram-positive bacteria in vitro and in vivo. Our new antibacterial lead, N1,N3-n-octylbenzyldioxonaphthoimidazolium bromide (11), exhibited highly potent antibacterial activities against various gram-positive bacterial strains (MICs: 0.19-0.39 μg/mL), including MRSA, methicillin-sensitive S. aureus, and Bacillus subtilis. Moreover, antibacterial mechanism of 11 against MRSA based on the generation of reactive oxygen species (ROS) was evaluated. Although compound 11 exhibited cytotoxic effects in vitro and lacked a therapeutic index against the HEK293 and HDFa mammalian cell lines, it exhibited low toxicity in the Drosophila animal model. Remarkably, 11 exhibited better in vivo antibacterial efficacy than c5 and the clinically used antibiotic, vancomycin, in SA3-infected Drosophila model. Moreover, the development of bacterial resistance to 11 was not observed after 16 consecutive passages. Therefore, rational design of antibacterial cationic amphiphiles based on ROS-generating pharmacophores with optimized lipophilicity can facilitate the identification of potent antibacterial agents against drug-resistant infections.
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Affiliation(s)
- Taewoo Kim
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 120 Haeryong-ro, Pocheon-si, Gyeonggi-do 11160, Republic of Korea
| | - Shin-Yae Choi
- Program of Biopharmaceutical Science, College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 335 Pangyo-ro, Seongnam-si, Gyeonggi-do 13488, Republic of Korea
| | - Hee-Won Bae
- Program of Biopharmaceutical Science, College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 335 Pangyo-ro, Seongnam-si, Gyeonggi-do 13488, Republic of Korea
| | - Hyun Su Kim
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 120 Haeryong-ro, Pocheon-si, Gyeonggi-do 11160, Republic of Korea
| | - Hoon Jeon
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 120 Haeryong-ro, Pocheon-si, Gyeonggi-do 11160, Republic of Korea
| | - Haejun Oh
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 120 Haeryong-ro, Pocheon-si, Gyeonggi-do 11160, Republic of Korea
| | - Sung-Hoon Ahn
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jongkook Lee
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Young-Ger Suh
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 120 Haeryong-ro, Pocheon-si, Gyeonggi-do 11160, Republic of Korea
| | - You-Hee Cho
- Program of Biopharmaceutical Science, College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, 335 Pangyo-ro, Seongnam-si, Gyeonggi-do 13488, Republic of Korea.
| | - Seok-Ho Kim
- College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea.
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3
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Padhy I, Dwibedy SK, Mohapatra SS. A molecular overview of the polymyxin-LPS interaction in the context of its mode of action and resistance development. Microbiol Res 2024; 283:127679. [PMID: 38508087 DOI: 10.1016/j.micres.2024.127679] [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: 07/31/2023] [Revised: 03/03/2024] [Accepted: 03/06/2024] [Indexed: 03/22/2024]
Abstract
With the rising incidences of antimicrobial resistance (AMR) and the diminishing options of novel antimicrobial agents, it is paramount to decipher the molecular mechanisms of action and the emergence of resistance to the existing drugs. Polymyxin, a cationic antimicrobial lipopeptide, is used to treat infections by Gram-negative bacterial pathogens as a last option. Though polymyxins were identified almost seventy years back, their use has been restricted owing to toxicity issues in humans. However, their clinical use has been increasing in recent times resulting in the rise of polymyxin resistance. Moreover, the detection of "mobile colistin resistance (mcr)" genes in the environment and their spread across the globe have complicated the scenario. The mechanism of polymyxin action and the development of resistance is not thoroughly understood. Specifically, the polymyxin-bacterial lipopolysaccharide (LPS) interaction is a challenging area of investigation. The use of advanced biophysical techniques and improvement in molecular dynamics simulation approaches have furthered our understanding of this interaction, which will help develop polymyxin analogs with better bactericidal effects and lesser toxicity in the future. In this review, we have delved deeper into the mechanisms of polymyxin-LPS interactions, highlighting several models proposed, and the mechanisms of polymyxin resistance development in some of the most critical Gram-negative pathogens.
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Affiliation(s)
- Indira Padhy
- Molecular Microbiology Lab, Department of Biotechnology, Berhampur University, Bhanja Bihar, Berhampur 760007, Odisha, India
| | - Sambit K Dwibedy
- Molecular Microbiology Lab, Department of Biotechnology, Berhampur University, Bhanja Bihar, Berhampur 760007, Odisha, India
| | - Saswat S Mohapatra
- Molecular Microbiology Lab, Department of Biotechnology, Berhampur University, Bhanja Bihar, Berhampur 760007, Odisha, India.
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4
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MacNair CR, Rutherford ST, Tan MW. Alternative therapeutic strategies to treat antibiotic-resistant pathogens. Nat Rev Microbiol 2024; 22:262-275. [PMID: 38082064 DOI: 10.1038/s41579-023-00993-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2023] [Indexed: 04/19/2024]
Abstract
Resistance threatens to render antibiotics - which are essential for modern medicine - ineffective, thus posing a threat to human health. The discovery of novel classes of antibiotics able to overcome resistance has been stalled for decades, with the developmental pipeline relying almost entirely on variations of existing chemical scaffolds. Unfortunately, this approach has been unable to keep pace with resistance evolution, necessitating new therapeutic strategies. In this Review, we highlight recent efforts to discover non-traditional antimicrobials, specifically describing the advantages and limitations of antimicrobial peptides and macrocycles, antibodies, bacteriophages and antisense oligonucleotides. These approaches have the potential to stem the tide of resistance by expanding the physicochemical property space and target spectrum occupied by currently approved antibiotics.
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Affiliation(s)
- Craig R MacNair
- Department of Infectious Diseases, Genentech Inc., South San Francisco, CA, USA
| | - Steven T Rutherford
- Department of Infectious Diseases, Genentech Inc., South San Francisco, CA, USA
| | - Man-Wah Tan
- Department of Infectious Diseases, Genentech Inc., South San Francisco, CA, USA.
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5
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Varache M, Rizzo S, Sayers EJ, Newbury L, Mason A, Liao CT, Chiron E, Bourdiec N, Jones A, Fraser DJ, Taylor PR, Jones AT, Thomas DW, Ferguson EL. Dextrin conjugation to colistin inhibits its toxicity, cellular uptake and acute kidney injury in vivo. RSC PHARMACEUTICS 2024; 1:68-79. [PMID: 38646595 PMCID: PMC11024668 DOI: 10.1039/d3pm00014a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/04/2024] [Indexed: 04/23/2024]
Abstract
The acute kidney injury (AKI) and dose-limiting nephrotoxicity, which occurs in 20-60% of patients following systemic administration of colistin, represents a challenge in the effective treatment of multi-drug resistant Gram-negative infections. To reduce clinical toxicity of colistin and improve targeting to infected/inflamed tissues, we previously developed dextrin-colistin conjugates, whereby colistin is designed to be released by amylase-triggered degradation of dextrin in infected and inflamed tissues, after passive targeting by the enhanced permeability and retention effect. Whilst it was evident in vitro that polymer conjugation can reduce toxicity and prolong plasma half-life, without significant reduction in antimicrobial activity of colistin, it was unclear how dextrin conjugation would alter cellular uptake and localisation of colistin in renal tubular cells in vivo. We discovered that dextrin conjugation effectively reduced colistin's toxicity towards human kidney proximal tubular epithelial cells (HK-2) in vitro, which was mirrored by significantly less cellular uptake of Oregon Green (OG)-labelled dextrin-colistin conjugate, when compared to colistin. Using live-cell confocal imaging, we revealed localisation of both, free and dextrin-bound colistin in endolysosome compartments of HK-2 and NRK-52E cells. Using a murine AKI model, we demonstrated dextrin-colistin conjugation dramatically diminishes both proximal tubular injury and renal accumulation of colistin. These findings reveal new insight into the mechanism by which dextrin conjugation can overcome colistin's renal toxicity and show the potential of polymer conjugation to improve the side effect profile of nephrotoxic drugs.
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Affiliation(s)
- Mathieu Varache
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Siân Rizzo
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Edward J Sayers
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University CF10 3NB UK
| | - Lucy Newbury
- Wales Kidney Research Unit, Division of Infection and Immunity, School of Medicine, College of Biomedical and Life Sciences, Cardiff University Cardiff CF14 4XN UK
| | - Anna Mason
- Wales Kidney Research Unit, Division of Infection and Immunity, School of Medicine, College of Biomedical and Life Sciences, Cardiff University Cardiff CF14 4XN UK
| | - Chia-Te Liao
- Systems Immunity Research Institute, Division of Infection and Immunity, School of Medicine, Cardiff University Cardiff CF14 4XN UK
| | - Emilie Chiron
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Nathan Bourdiec
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
| | - Adam Jones
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
- Cellular Pathology Department, University Dental Hospital, Cardiff and Vale University Health Board Cardiff CF14 4XY UK
| | - Donald J Fraser
- Wales Kidney Research Unit, Division of Infection and Immunity, School of Medicine, College of Biomedical and Life Sciences, Cardiff University Cardiff CF14 4XN UK
| | - Philip R Taylor
- Systems Immunity Research Institute, Division of Infection and Immunity, School of Medicine, Cardiff University Cardiff CF14 4XN UK
- UK Dementia Research Institute at Cardiff Hadyn Ellis Building Maindy Road Cardiff CF24 4HQ UK
| | - Arwyn T Jones
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University CF10 3NB UK
| | - David W Thomas
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
- Systems Immunity Research Institute, Division of Infection and Immunity, School of Medicine, Cardiff University Cardiff CF14 4XN UK
| | - Elaine L Ferguson
- Advanced Therapies Group, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University Heath Park Cardiff CF14 4XY UK
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Slingerland C, Martin NI. Recent Advances in the Development of Polymyxin Antibiotics: 2010-2023. ACS Infect Dis 2024; 10:1056-1079. [PMID: 38470446 PMCID: PMC11019560 DOI: 10.1021/acsinfecdis.3c00630] [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: 11/18/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 03/13/2024]
Abstract
The polymyxins are nonribosomal lipopeptides produced by Paenibacillus polymyxa and are potent antibiotics with activity specifically directed against Gram-negative bacteria. While the clinical use of polymyxins has historically been limited due to their toxicity, their use is on the rise given the lack of alternative treatment options for infections due to multidrug resistant Gram-negative pathogens. The Gram-negative specificity of the polymyxins is due to their ability to target lipid A, the membrane embedded LPS anchor that decorates the cell surface of Gram-negative bacteria. Notably, the mechanisms responsible for polymyxin toxicity, and in particular their nephrotoxicity, are only partially understood with most insights coming from studies carried out in the past decade. In parallel, many synthetic and semisynthetic polymyxin analogues have been developed in recent years in an attempt to mitigate the nephrotoxicity of the natural products. Despite these efforts, to date, no polymyxin analogues have gained clinical approval. This may soon change, however, as at the moment there are three novel polymyxin analogues in clinical trials. In this context, this review provides an update of the most recent insights with regard to the structure-activity relationships and nephrotoxicity of new polymyxin variants reported since 2010. We also discuss advances in the synthetic methods used to generate new polymyxin analogues, both via total synthesis and semisynthesis.
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Affiliation(s)
- Cornelis
J. Slingerland
- Biological
Chemistry Group, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
| | - Nathaniel I. Martin
- Biological
Chemistry Group, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
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Sun HZ, Wei SY, Xu QM, Shang W, Li Q, Cheng JS, Yuan YJ. Enhancement of polymyxin B1 production by an artificial microbial consortium of Paenibacillus polymyxa and recombinant Corynebacterium glutamicum producing precursor amino acids. Synth Syst Biotechnol 2024; 9:176-185. [PMID: 38348399 PMCID: PMC10859264 DOI: 10.1016/j.synbio.2024.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 12/24/2023] [Accepted: 01/31/2024] [Indexed: 02/15/2024] Open
Abstract
Polymyxin B, produced by Paenibacillus polymyxa, is used as the last line of defense clinically. In this study, exogenous mixture of precursor amino acids increased the level and proportion of polymyxin B1 in the total of polymyxin B analogs of P. polymyxa CJX518-AC (PPAC) from 0.15 g/L and 61.8 % to 0.33 g/L and 79.9 %, respectively. The co-culture of strain PPAC and recombinant Corynebacterium glutamicum-leu01, which produces high levels of threonine, leucine, and isoleucine, increased polymyxin B1 production to 0.64 g/L. When strains PPAC and C. glu-leu01 simultaneously inoculated into an optimized medium with 20 g/L peptone, polymyxin B1 production was increased to 0.97 g/L. Furthermore, the polymyxin B1 production in the co-culture of strains PPAC and C. glu-leu01 increased to 2.21 g/L after optimized inoculation ratios and fermentation medium with 60 g/L peptone. This study provides a new strategy to improve polymyxin B1 production.
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Affiliation(s)
- Hui-Zhong Sun
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
- Department of Pharmaceutical, School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
| | - Si-Yu Wei
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
- Department of Pharmaceutical, School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
| | - Qiu-Man Xu
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Binshuixi Road 393, Xiqing District, Tianjin, 300387, PR China
| | - Wei Shang
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
- Department of Pharmaceutical, School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
| | - Qing Li
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
- Department of Pharmaceutical, School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
| | - Jing-Sheng Cheng
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
- Department of Pharmaceutical, School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
| | - Ying-Jin Yuan
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
- Department of Pharmaceutical, School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, PR China
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8
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Abdullah SJ, Mu Y, Bhattacharjya S. Structures, Interactions and Activity of the N-Terminal Truncated Variants of Antimicrobial Peptide Thanatin. Antibiotics (Basel) 2024; 13:74. [PMID: 38247633 PMCID: PMC10812785 DOI: 10.3390/antibiotics13010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 01/08/2024] [Accepted: 01/10/2024] [Indexed: 01/23/2024] Open
Abstract
Gram-negative bacteria are intrinsically more resistant to many frontline antibiotics, which is attributed to the permeability barrier of the outer membrane, drug efflux pumps and porins. Consequently, discovery of new small molecules antibiotics to kill drug-resistant Gram-negative bacteria presents a significant challenge. Thanatin, a 21-residue insect-derived antimicrobial peptide, is known for its potent activity against Enterobacter Gram-negative bacteria, including drug-resistant strains. Here, we investigated a 15-residue N-terminal truncated analog PM15 (P1IIYCNRRTGKCQRM15) of thanatin to determine modes of action and antibacterial activity. PM15 and the P1 to Y and A substituted variants PM15Y and PM15A delineated interactions and permeabilization of the LPS-outer membrane. In antibacterial assays, PM15 and the analogs showed growth inhibition of strains of Gram-negative bacteria that is largely dependent on the composition of the culture media. Atomic-resolution structures of PM15 and PM15Y in free solution and in complex with LPS micelle exhibited persistent β-hairpin structures similar to native thanatin. However, in complex with LPS, the structures of peptides are more compact, with extensive packing interactions among residues across the two anti-parallel strands of the β-hairpin. The docked complex of PM15/LPS revealed a parallel orientation of the peptide that may be sustained by potential ionic and van der Waals interactions with the lipid A moiety of LPS. Further, PM15 and PM15Y bind to LptAm, a monomeric functional variant of LptA, the periplasmic component of the seven-protein (A-G) complex involved in LPS transport. Taken together, the structures, target interactions and antibacterial effect of PM15 presented in the current study could be useful in designing thanatin-based peptide analogs.
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Affiliation(s)
| | | | - Surajit Bhattacharjya
- School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore; (S.J.A.); (Y.M.)
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Pourmasoumi F, Hengoju S, Beck K, Stephan P, Klopfleisch L, Hoernke M, Rosenbaum MA, Kries H. Analysing Megasynthetase Mutants at High Throughput Using Droplet Microfluidics. Chembiochem 2023; 24:e202300680. [PMID: 37804133 DOI: 10.1002/cbic.202300680] [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: 10/03/2023] [Accepted: 10/05/2023] [Indexed: 10/08/2023]
Abstract
Nonribosomal peptide synthetases (NRPSs) are giant enzymatic assembly lines that deliver many pharmaceutically valuable natural products, including antibiotics. As the search for new antibiotics motivates attempts to redesign nonribosomal metabolic pathways, more robust and rapid sorting and screening platforms are needed. Here, we establish a microfluidic platform that reliably detects production of the model nonribosomal peptide gramicidin S. The detection is based on calcein-filled sensor liposomes yielding increased fluorescence upon permeabilization. From a library of NRPS mutants, the sorting platform enriches the gramicidin S producer 14.5-fold, decreases internal stop codons 250-fold, and generates enrichment factors correlating with enzyme activity. Screening for NRPS activity with a reliable non-binary sensor will enable more sophisticated structure-activity studies and new engineering applications in the future.
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Affiliation(s)
- Farzaneh Pourmasoumi
- Junior Research Group Biosynthetic Design of Natural Products, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
| | - Sundar Hengoju
- Bio Pilot Plant, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
| | - Katharina Beck
- Faculty of Chemistry and Pharmacy, Albert-Ludwigs-Universität, Hermann-Herder-Str. 9, 79104, Freiburg i. Br., Germany
| | - Philipp Stephan
- Junior Research Group Biosynthetic Design of Natural Products, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
| | - Lukas Klopfleisch
- Junior Research Group Biosynthetic Design of Natural Products, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
| | - Maria Hoernke
- Faculty of Chemistry and Pharmacy, Albert-Ludwigs-Universität, Hermann-Herder-Str. 9, 79104, Freiburg i. Br., Germany
- Faculty of Chemistry, Martin-Luther-Universität, Von-Danckelmann-Platz 4, 06108, Halle (S.), Germany
| | - Miriam A Rosenbaum
- Bio Pilot Plant, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
- Faculty of Biological Sciences, Friedrich Schiller University Jena, 07743, Jena, Germany
| | - Hajo Kries
- Junior Research Group Biosynthetic Design of Natural Products, Leibniz Institute for Natural Product Research and Infection Biology (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
- Department of Chemistry, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany
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10
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Slingerland CJ, Lysenko V, Chaudhuri S, Wesseling CMJ, Barnes D, Masereeuw R, Martin NI. Semisynthetic polymyxins with potent antibacterial activity and reduced kidney cell toxicity. RSC Med Chem 2023; 14:2417-2425. [PMID: 37974968 PMCID: PMC10650952 DOI: 10.1039/d3md00456b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 10/06/2023] [Indexed: 11/19/2023] Open
Abstract
The growing incidence of infections caused by multi-drug resistant Gram-negative bacteria has led to an increased use of last-resort antibiotics such as the polymyxins. Polymyxin therapy is limited by toxicity concerns, most notably nephrotoxicity. Recently we reported the development of a novel class of semisynthetic polymyxins with reduced toxicity wherein the N-terminal lipid and diaminobutyric acid residue are replaced by a cysteine-linked lipid featuring a reductively labile disulfide bond. In the present study we further explored the potential of this approach by also varying the amino acid residue directly adjacent to the polymyxin macrocycle. This led to the identification of new semisynthetic polymyxins that maintain the potent antibacterial activity of the clinically used polymyxin B while exhibiting a further reduction in toxicity toward human proximal tubule epithelial cells. Furthermore, these new polymyxins were found to effectively synergize with novobiocin, rifampicin, and erythromycin against mcr-positive, polymyxin resistant E. coli.
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Affiliation(s)
- Cornelis J Slingerland
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University Sylviusweg 72 2333 BE Leiden The Netherlands
| | - Vladyslav Lysenko
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University Sylviusweg 72 2333 BE Leiden The Netherlands
| | - Samhita Chaudhuri
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University Sylviusweg 72 2333 BE Leiden The Netherlands
| | - Charlotte M J Wesseling
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University Sylviusweg 72 2333 BE Leiden The Netherlands
| | - Devon Barnes
- Division of Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Utrecht University 3584 CG Utrecht The Netherlands
| | - Rosalinde Masereeuw
- Division of Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Utrecht University 3584 CG Utrecht The Netherlands
| | - Nathaniel I Martin
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University Sylviusweg 72 2333 BE Leiden The Netherlands
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11
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Draveny M, Rose C, Pinet A, Ferrié L, Figadère B, Brunel JM, Masi M. Scope and Limitations of Exploiting the Ability of the Chemosensitizer NV716 to Enhance the Activity of Tetracycline Derivatives against Pseudomonas aeruginosa. Molecules 2023; 28:molecules28114262. [PMID: 37298737 DOI: 10.3390/molecules28114262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
The spread of antibiotic resistance is an urgent threat to global health that requires new therapeutic approaches. Treatments for pathogenic Gram-negative bacteria are particularly challenging to identify due to the robust OM permeability barrier in these organisms. One strategy is to use antibiotic adjuvants, a class of drugs that have no significant antibacterial activity on their own but can act synergistically with certain antibiotics. Previous studies described the discovery and development of polyaminoisoprenyl molecules as antibiotic adjuvants with an OM effect. In particular, the compound NV716 has been shown to sensitize Pseudomonas aeruginosa to tetracycline antibiotics such as doxycycline. Here, we sought to explore the disruption of OM to sensitize P. aeruginosa to otherwise inactive antimicrobials using a series of tetracycline derivatives in the presence of NV716. We found that OM disruption expands the hydrophobicity threshold consistent with antibacterial activity to include hydrophobic molecules, thereby altering permeation rules in Gram-negative bacteria.
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Affiliation(s)
- Margot Draveny
- MCT, INSERM U1261, UMR_MD1, Aix-Marseille Univ. & IRBA SSA, 27 Boulevard Jean Moulin, 13005 Marseille, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France
| | - Clémence Rose
- BioCIS, Bâtiment H. Moissan, Université Paris-Saclay, CNRS, 91400 Orsay, France
| | - Alexis Pinet
- BioCIS, Bâtiment H. Moissan, Université Paris-Saclay, CNRS, 91400 Orsay, France
| | - Laurent Ferrié
- BioCIS, Bâtiment H. Moissan, Université Paris-Saclay, CNRS, 91400 Orsay, France
| | - Bruno Figadère
- BioCIS, Bâtiment H. Moissan, Université Paris-Saclay, CNRS, 91400 Orsay, France
| | - Jean-Michel Brunel
- MCT, INSERM U1261, UMR_MD1, Aix-Marseille Univ. & IRBA SSA, 27 Boulevard Jean Moulin, 13005 Marseille, France
| | - Muriel Masi
- MCT, INSERM U1261, UMR_MD1, Aix-Marseille Univ. & IRBA SSA, 27 Boulevard Jean Moulin, 13005 Marseille, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France
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12
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Li Y, Dong Y, Lu J, Zhang J, Feng M, Feng J. Design, synthesis and antibacterial activity of novel colistin derivatives with thioether bond-mediated cyclic scaffold. J Antibiot (Tokyo) 2023; 76:260-269. [PMID: 36941353 DOI: 10.1038/s41429-023-00606-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/16/2023] [Accepted: 02/23/2023] [Indexed: 03/23/2023]
Abstract
The escalating crisis of multidrug resistance is raising the fear of untreatable Gram-negative infections and killing a substantial number of patients. The underpopulated antibiotic drug development pipelines drive polymyxins (polymyxin B and colistin) as crucial therapeutic options. However, the cumbersome synthesis process and inefficient cyclization method limit the efficient preparation of polymyxin core scaffolds in the development of polymyxin derivatives. Here, we innovatively applied a substitution reaction between bromobenzene and sulfhydryl to cyclize colistin core scaffolds. The reaction was mild and efficient, improving the total yield of the compound from less than 10% to 55.90%. Nearly 30 novel derivatives with thioether bond-mediated cyclic scaffolds were designed and synthesized. Evaluation of antibacterial activities and biological properties revealed that many new compounds that are stable in mouse plasma possess high antimicrobial potency against Gram-negative bacteria and display no hemolytic toxicity. Our optimal peptide PE-2C-C8-DH eradicated Acinetobacter baumannii within 24 h in vitro, and had lower acute toxicity and significant therapeutic effects on mice infected with Pseudomonas aeruginosa, which deserves further development.
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Affiliation(s)
- Yanan Li
- Department of Biological Medicines & Shanghai Engineering Research Centre of Immunotherapeutics, School of Pharmacy, Fudan University, 201203, Shanghai, China
| | - Yuanzhen Dong
- China State Institute of Pharmaceutical Industry, 201203, Shanghai, China
- Shanghai Duomirui Biotechnology Ltd., 201203, Shanghai, China
| | - Jianguang Lu
- China State Institute of Pharmaceutical Industry, 201203, Shanghai, China
- Shanghai Duomirui Biotechnology Ltd., 201203, Shanghai, China
| | - Jinhua Zhang
- China State Institute of Pharmaceutical Industry, 201203, Shanghai, China
- Shanghai Duomirui Biotechnology Ltd., 201203, Shanghai, China
| | - Meiqing Feng
- Department of Biological Medicines & Shanghai Engineering Research Centre of Immunotherapeutics, School of Pharmacy, Fudan University, 201203, Shanghai, China.
| | - Jun Feng
- China State Institute of Pharmaceutical Industry, 201203, Shanghai, China.
- Shanghai Duomirui Biotechnology Ltd., 201203, Shanghai, China.
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13
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Heithoff DM, Mahan SP, Barnes V L, Leyn SA, George CX, Zlamal JE, Limwongyut J, Bazan GC, Fried JC, Fitzgibbons LN, House JK, Samuel CE, Osterman AL, Low DA, Mahan MJ. A broad-spectrum synthetic antibiotic that does not evoke bacterial resistance. EBioMedicine 2023; 89:104461. [PMID: 36801104 PMCID: PMC10025758 DOI: 10.1016/j.ebiom.2023.104461] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND Antimicrobial resistance (AMR) poses a critical threat to public health and disproportionately affects the health and well-being of persons in low-income and middle-income countries. Our aim was to identify synthetic antimicrobials termed conjugated oligoelectrolytes (COEs) that effectively treated AMR infections and whose structures could be readily modified to address current and anticipated patient needs. METHODS Fifteen chemical variants were synthesized that contain specific alterations to the COE modular structure, and each variant was evaluated for broad-spectrum antibacterial activity and for in vitro cytotoxicity in cultured mammalian cells. Antibiotic efficacy was analyzed in murine models of sepsis; in vivo toxicity was evaluated via a blinded study of mouse clinical signs as an outcome of drug treatment. FINDINGS We identified a compound, COE2-2hexyl, that displayed broad-spectrum antibacterial activity. This compound cured mice infected with clinical bacterial isolates derived from patients with refractory bacteremia and did not evoke bacterial resistance. COE2-2hexyl has specific effects on multiple membrane-associated functions (e.g., septation, motility, ATP synthesis, respiration, membrane permeability to small molecules) that may act together to negate bacterial cell viability and the evolution of drug-resistance. Disruption of these bacterial properties may occur through alteration of critical protein-protein or protein-lipid membrane interfaces-a mechanism of action distinct from many membrane disrupting antimicrobials or detergents that destabilize membranes to induce bacterial cell lysis. INTERPRETATION The ease of molecular design, synthesis and modular nature of COEs offer many advantages over conventional antimicrobials, making synthesis simple, scalable and affordable. These COE features enable the construction of a spectrum of compounds with the potential for development as a new versatile therapy for an imminent global health crisis. FUNDING U.S. Army Research Office, National Institute of Allergy and Infectious Diseases, and National Heart, Lung, and Blood Institute.
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Affiliation(s)
- Douglas M Heithoff
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA, 93106, USA; Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA
| | - Scott P Mahan
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA, 93106, USA; Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA; Department of Medical Microbiology and Immunology, School of Medicine, University of California, Davis, CA, 95616, USA
| | - Lucien Barnes V
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA, 93106, USA; Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA
| | - Semen A Leyn
- Infectious and Inflammatory Diseases Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Cyril X George
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA, 93106, USA; Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA
| | - Jaime E Zlamal
- Infectious and Inflammatory Diseases Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Jakkarin Limwongyut
- Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA; Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Guillermo C Bazan
- Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA; Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA; Department of Chemistry, National University of Singapore, 117543, Singapore
| | - Jeffrey C Fried
- Department of Medical Education, Santa Barbara Cottage Hospital, Santa Barbara, CA, 93105, USA; Department of Pulmonary and Critical Care Medicine, Santa Barbara Cottage Hospital, Santa Barbara, CA, 93105, USA
| | - Lynn N Fitzgibbons
- Department of Medical Education, Santa Barbara Cottage Hospital, Santa Barbara, CA, 93105, USA; Division of Infectious Diseases, Santa Barbara Cottage Hospital, Santa Barbara, CA, 93105, USA
| | - John K House
- Faculty of Science, Sydney School of Veterinary Science, The University of Sydney, Camden, New South Wales, 2570, Australia
| | - Charles E Samuel
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA, 93106, USA; Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA
| | - Andrei L Osterman
- Infectious and Inflammatory Diseases Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - David A Low
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA, 93106, USA; Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA.
| | - Michael J Mahan
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA, 93106, USA; Institute for Collaborative Biotechnologies, University of California, Santa Barbara, CA, 93106, USA.
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14
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Joo H, Eom H, Cho Y, Rho M, Song WJ. Discovery and Characterization of Polymyxin-Resistance Genes pmrE and pmrF from Sediment and Seawater Microbiome. Microbiol Spectr 2023; 11:e0273622. [PMID: 36602384 PMCID: PMC9927302 DOI: 10.1128/spectrum.02736-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Polymyxins are the last-line antibiotics used to treat Gram-negative pathogens. Thus, the discovery and biochemical characterization of the resistance genes against polymyxins are urgently needed for diagnosis, treatment, and novel antibiotic design. Herein, we report novel polymyxin-resistance genes identified from sediment and seawater microbiome. Despite their low sequence identity against the known pmrE and pmrF, they show in vitro activities in UDP-glucose oxidation and l-Ara4N transfer to undecaprenyl phosphate, respectively, which occur as the part of lipid A modification that leads to polymyxin resistance. The expression of pmrE and pmrF also showed substantially high MICs in the presence of vanadate ions, indicating that they constitute polymyxin resistomes. IMPORTANCE Polymyxins are one of the last-resort antibiotics. Polymyxin resistance is a severe threat to combat multidrug-resistant pathogens. Thus, up-to-date identification and understanding of the related genes are crucial. Herein, we performed structure-guided sequence and activity analysis of five putative polymyxin-resistant metagenomes. Despite relatively low sequence identity to the previously reported polymyxin-resistance genes, at least four out of five discovered genes show reactivity essential for lipid A modification and polymyxin resistance, constituting antibiotic resistomes.
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Affiliation(s)
- Hwanjin Joo
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
| | - Hyunuk Eom
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
| | - Youna Cho
- Department of Computer Science, Hanyang University, Seoul, Republic of Korea
| | - Mina Rho
- Department of Computer Science, Hanyang University, Seoul, Republic of Korea
- Department of Biomedical Informatics, Hanyang University, Seoul, Republic of Korea
| | - Woon Ju Song
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
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15
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Zou P, Liu J, Li X, Yaseen M, Yao J, Liu L, Luo L, Wang H, Shi X, Li Z, Sun T, Gao Y, Gao C, Li LL. A Membrane Curvature Modulated Lipopeptide to Broadly Combat Multidrug-Resistant Bacterial Pneumonia with Low Resistance Risk. ACS NANO 2022; 16:20545-20558. [PMID: 36375012 DOI: 10.1021/acsnano.2c07251] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The extensive spread of multidrug resistance to Gram-negative bacteria has become a huge threat to human health, where peptide-based antibacterial agents have emerged as a powerful star weapon. Here we report a lipopeptide (LP-20) constructed nanomicelle with a different antibacterial mechanism of membrane curvature modulation, which induced dynamic membrane fission resulting in acceleration and enhancement of antibacterial activity to clinically isolated ESKAPE strains, including multidrug-resistant (MDR) pathogens. The minimum inhibitory concentration was reduced to 2-10 μM, and the minimum duration for killing was shortened to less than an hour by LP-20. This is an improvement over antimicrobial peptides and traditional antibiotics, such as ciprofloxacin and tetracycline, significantly enhancing antibacterial activity for MDR, and we observed no acquisition of resistance for one month. This accelerated germicidal mechanism was attributed to multitargeting with lipopolysaccharides, phosphoethanolamine, phosphatidylglycerol, and cardiolipin, and the synergetic interactions induced a high curvature of the bacterial membrane, which facilitated simultaneously efficient damage to both inner and outer membrane. The LP-20 effectively prolonged the lifetime of myositis mice with Escherichia coli MDR and pneumonia mice with Klebsiella pneumoniae through a hepatic metabolism with ignorable toxicity. This study provides critical information for the fabrication of lipopeptide-based nano-antibiotics for the efficient control of intractable MDR caused by Gram-negative pathogens.
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Affiliation(s)
- Pengfei Zou
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing100190, China
- State key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing100850, China
- School of Pharmacy, Weifang Medical University, Weifang261053, China
| | - Jiao Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing100190, China
- School of Pharmacy, Weifang Medical University, Weifang261053, China
| | - Xinyu Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing100190, China
| | - Muhammad Yaseen
- Institute of Chemical Sciences, University of Peshawar, Peshawar25120, KP, Pakistan
| | - Jiahui Yao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing100190, China
- Department of Pharmacy, PLA General Hospital, Center of Medicine Clinical Research, Beijing100853, China
| | - Lingling Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing100190, China
- Department of Pharmacy, PLA General Hospital, Center of Medicine Clinical Research, Beijing100853, China
| | - Lujun Luo
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing100190, China
| | - Hui Wang
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Beijing100190, China
| | - Xinghua Shi
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Beijing100190, China
| | - Zhiping Li
- State key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing100850, China
| | - Tongyi Sun
- School of Life Science and Technology, Shandong Key Laboratory of Proteins and Peptides Pharmaceutical Engineering, Shandong Universities Key Laboratory of Biopharmaceuticals, Weifang Medical University, Weifang261053, China
| | - Yuanyuan Gao
- School of Pharmacy, Weifang Medical University, Weifang261053, China
| | - Chunsheng Gao
- State key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing100850, China
| | - Li Li Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing100190, China
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16
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Novikov A, Sayfutdinova A, Botchkova E, Kopitsyn D, Fakhrullin R. Antibiotic Susceptibility Testing with Raman Biosensing. Antibiotics (Basel) 2022; 11:antibiotics11121812. [PMID: 36551469 PMCID: PMC9774239 DOI: 10.3390/antibiotics11121812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/29/2022] [Accepted: 12/02/2022] [Indexed: 12/15/2022] Open
Abstract
Antibiotics guard us against bacterial infections and are among the most commonly used medicines. The immediate consequence of their large-scale production and prescription is the development of antibiotic resistance. Therefore, rapid detection of antibiotic susceptibility is required for efficient antimicrobial therapy. One of the promising methods for rapid antibiotic susceptibility testing is Raman spectroscopy. Raman spectroscopy combines fast and contactless acquisition of spectra with good selectivity towards bacterial cells. The antibiotic-induced changes in bacterial cell physiology are detected as distinct features in Raman spectra and can be associated with antibiotic susceptibility. Therefore, the Raman-based approach may be beneficial in designing therapy against multidrug-resistant infections. The surface-enhanced Raman spectroscopy (SERS) and resonance Raman spectroscopy (RRS) additionally provide excellent sensitivity. In this review, we present an analysis of the Raman spectroscopy-based optical biosensing approaches aimed at antibiotic susceptibility testing.
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Affiliation(s)
- Andrei Novikov
- Department of Physical and Colloid Chemistry, Gubkin University, 65/1 Leninsky Prospect, 119991 Moscow, Russia
- Correspondence: (A.N.); (R.F.)
| | - Adeliya Sayfutdinova
- Department of Physical and Colloid Chemistry, Gubkin University, 65/1 Leninsky Prospect, 119991 Moscow, Russia
| | - Ekaterina Botchkova
- Department of Physical and Colloid Chemistry, Gubkin University, 65/1 Leninsky Prospect, 119991 Moscow, Russia
| | - Dmitry Kopitsyn
- Department of Physical and Colloid Chemistry, Gubkin University, 65/1 Leninsky Prospect, 119991 Moscow, Russia
| | - Rawil Fakhrullin
- Department of Physical and Colloid Chemistry, Gubkin University, 65/1 Leninsky Prospect, 119991 Moscow, Russia
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Republic of Tatarstan, Russia
- Correspondence: (A.N.); (R.F.)
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17
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Harris PWR, Siow A, Yang SH, Wadsworth AD, Tan L, Hermant Y, Mao Y, An C, Hanna CC, Cameron AJ, Allison JR, Chakraborty A, Ferguson SA, Mros S, Hards K, Cook GM, Williamson DA, Carter GP, Chan STS, Painter GA, Sander V, Davidson AJ, Brimble MA. Synthesis, Antibacterial Activity, and Nephrotoxicity of Polymyxin B Analogues Modified at Leu-7, d-Phe-6, and the N-Terminus Enabled by S-Lipidation. ACS Infect Dis 2022; 8:2413-2429. [PMID: 36413173 DOI: 10.1021/acsinfecdis.1c00347] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
With the post-antibiotic era rapidly approaching, many have turned their attention to developing new treatments, often by structural modification of existing antibiotics. Polymyxins, a family of lipopeptide antibiotics that are used as a last line of defense in the clinic, have recently developed resistance and exhibit significant nephrotoxicity issues. Using thiol-ene chemistry, the facile preparation of six unique S-lipidated building blocks was demonstrated and used to generate lipopeptide mimetics upon incorporation into solid-phase peptide synthesis (SPPS). We then designed and synthesized 38 polymyxin analogues, incorporating these unique building blocks at the N-terminus, or to replace hydrophobic residues at positions 6 and 7 of the native lipopeptides. Several polymyxin analogues bearing one or more S-linked lipids were found to be equipotent to polymyxin, showed minimal kidney nephrotoxicity, and demonstrated activity against several World Health Organisation (WHO) priority pathogens. The S-lipidation strategy has demonstrated potential as a novel approach to prepare innovative new lipopeptide antibiotics.
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Affiliation(s)
- Paul W R Harris
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Andrew Siow
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Sung-Hyun Yang
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Andrew D Wadsworth
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Lyndia Tan
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Yann Hermant
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Yubing Mao
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Chalice An
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Cameron C Hanna
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Alan J Cameron
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Jane R Allison
- School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Aparajita Chakraborty
- School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
| | - Scott A Ferguson
- Department of Microbiology and Immunology, University of Otago, 720 Cumberland Street, Dunedin 9054, New Zealand
| | - Sonya Mros
- Department of Microbiology and Immunology, University of Otago, 720 Cumberland Street, Dunedin 9054, New Zealand
| | - Kiel Hards
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand.,Department of Microbiology and Immunology, University of Otago, 720 Cumberland Street, Dunedin 9054, New Zealand
| | - Gregory M Cook
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand.,Department of Microbiology and Immunology, University of Otago, 720 Cumberland Street, Dunedin 9054, New Zealand
| | - Deborah A Williamson
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, The Doherty Institute for Infection and Immunity, The University of Melbourne, 792 Elizabeth Street, Melbourne, VIC 3000, Australia.,Doherty Applied Microbial Genomics, Department of Microbiology & Immunology, The Doherty Institute for Infection and Immunity, The University of Melbourne, 792 Elizabeth Street, Melbourne, VIC 3000, Australia
| | - Glen P Carter
- Doherty Applied Microbial Genomics, Department of Microbiology & Immunology, The Doherty Institute for Infection and Immunity, The University of Melbourne, 792 Elizabeth Street, Melbourne, VIC 3000, Australia
| | - Susanna T S Chan
- Ferrier Research Institute, Te Herenga Waka─Victoria University of Wellington, Gracefield Innovation Quarter, 69 Gracefield Road, Lower Hutt 5010, New Zealand
| | - Gavin A Painter
- Ferrier Research Institute, Te Herenga Waka─Victoria University of Wellington, Gracefield Innovation Quarter, 69 Gracefield Road, Lower Hutt 5010, New Zealand
| | - Veronika Sander
- Department of Molecular Medicine & Pathology, The University of Auckland, Auckland 1142, New Zealand
| | - Alan J Davidson
- Department of Molecular Medicine & Pathology, The University of Auckland, Auckland 1142, New Zealand
| | - Margaret A Brimble
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand.,School of Biological Sciences, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3b Symonds Street, Auckland 1142, New Zealand
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18
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Slingerland C, Kotsogianni I, Wesseling CMJ, Martin NI. Polymyxin Stereochemistry and Its Role in Antibacterial Activity and Outer Membrane Disruption. ACS Infect Dis 2022; 8:2396-2404. [PMID: 36342383 PMCID: PMC9745799 DOI: 10.1021/acsinfecdis.2c00307] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
With increasing rates of resistance toward commonly used antibiotics, especially among Gram-negative bacteria, there is renewed interested in polymyxins. Polymyxins are lipopeptide antibiotics with potent anti-Gram-negative activity and are generally believed to target lipid A, the lipopolysaccharide (LPS) anchor found in the outer membrane of Gram-negative bacteria. To characterize the stereochemical aspects of their mechanism(s) of action, we synthesized the full enantiomers of polymyxin B and the polymyxin B nonapeptide (PMBN). Both compounds were compared with the natural compounds in biological and biophysical assays, revealing strongly reduced antibacterial activity for the enantiomeric species. The enantiomeric compounds also exhibit reduced LPS binding, lower outer membrane (OM) permeabilization, and loss of synergetic potential. These findings provide new insights into the stereochemical requirements underlying the mechanisms of action of polymyxin B and PMBN.
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19
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Slingerland C, Wesseling CMJ, Innocenti P, Westphal KGC, Masereeuw R, Martin NI. Synthesis and Evaluation of Polymyxins Bearing Reductively Labile Disulfide-Linked Lipids. J Med Chem 2022; 65:15878-15892. [PMID: 36399613 PMCID: PMC9743094 DOI: 10.1021/acs.jmedchem.2c01528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Polymyxins are a class of lipopeptide anti-infective agents with potent and specific activity against Gram-negative bacteria. While toxicity concerns associated with polymyxin B and E (colistin) have historically limited their clinical application, today they are increasingly used as last-resort antibiotics given the rise of multidrug-resistant Gram-negative pathogens. The adverse side effects of polymyxins are well known, particularly as related to their nephrotoxicity. Here, we describe the synthesis and evaluation of a novel series of polymyxin analogues, aimed at reducing their nephrotoxic effects. Using a semisynthetic approach, we explored modifications of the exocyclic part of the polymyxin scaffold, namely, the terminal amino acid and lipophilic tail. By incorporating a reductively labile disulfide linkage in the lipid tail, we obtained novel polymyxins that exhibit potent antibacterial activity on par with polymyxin B but with reduced toxicity toward human renal proximal tubular epithelial cells.
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Affiliation(s)
- Cornelis
J. Slingerland
- Biological
Chemistry Group, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
| | - Charlotte M. J. Wesseling
- Biological
Chemistry Group, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
| | - Paolo Innocenti
- Biological
Chemistry Group, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
| | - Koen G. C. Westphal
- Division
of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Rosalinde Masereeuw
- Division
of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Nathaniel I. Martin
- Biological
Chemistry Group, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands,
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20
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Next-Generation Polymyxin Class of Antibiotics: A Ray of Hope Illuminating a Dark Road. Antibiotics (Basel) 2022; 11:antibiotics11121711. [PMID: 36551367 PMCID: PMC9774142 DOI: 10.3390/antibiotics11121711] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/21/2022] [Accepted: 11/25/2022] [Indexed: 11/29/2022] Open
Abstract
Although new-generation antimicrobials, in particular β-lactam/β-lactamase inhibitors, have largely replaced polymyxins in carbapenem-resistant Gram-negative bacterial infections, polymyxins are still needed for carbapanem-resistant Acinetobacter baumannii infections and in settings where novel agents are not readily available. Despite their potent in vitro activity, the clinical utility of polymyxins is significantly limited by their pharmacokinetic properties and nephrotoxicity risk. There is significant interest, therefore, in developing next-generation polymyxins with activity against colistin-resistant strains and lower toxicity than existing polymyxins. In this review, we aim to present the antibacterial activity mechanisms, in vitro and in vivo efficacy data, and toxicity profiles of new-generation polymyxins, including SPR206, MRX-8, and QPX9003, as well as the general characteristics of old polymyxins. Considering the emergence of colistin-resistant strains particularly in endemic regions, the restoration of the antimicrobial activity of polymyxins via PBT2 is also described in this review.
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21
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Chiu S, Hancock AM, Schofner BW, Sniezek KJ, Soto-Echevarria N, Leon G, Sivaloganathan DM, Wan X, Brynildsen MP. Causes of polymyxin treatment failure and new derivatives to fill the gap. J Antibiot (Tokyo) 2022; 75:593-609. [PMID: 36123537 DOI: 10.1038/s41429-022-00561-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 11/08/2022]
Abstract
Polymyxins are a class of antibiotics that were discovered in 1947 from programs searching for compounds effective in the treatment of Gram-negative infections. Produced by the Gram-positive bacterium Paenibacillus polymyxa and composed of a cyclic peptide chain with a peptide-fatty acyl tail, polymyxins exert bactericidal effects through membrane disruption. Currently, polymyxin B and colistin (polymyxin E) have been developed for clinical use, where they are reserved as "last-line" therapies for multidrug-resistant (MDR) infections. Unfortunately, the incidences of strains resistant to polymyxins have been increasing globally, and polymyxin heteroresistance has been gaining appreciation as an important clinical challenge. These phenomena, along with bacterial tolerance to this antibiotic class, constitute important contributors to polymyxin treatment failure. Here, we review polymyxins and their mechanism of action, summarize the current understanding of how polymyxin treatment fails, and discuss how the next generation of polymyxins holds promise to invigorate this antibiotic class.
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Affiliation(s)
- Selena Chiu
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
| | - Anna M Hancock
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
| | - Bob W Schofner
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA
| | - Katherine J Sniezek
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
| | | | - Gabrielle Leon
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
| | | | - Xuanqing Wan
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
| | - Mark P Brynildsen
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA.
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA.
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22
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Al-Marzooq F, Ghazawi A, Tariq S, Daoud L, Collyns T. Discerning the role of polymyxin B nonapeptide in restoring the antibacterial activity of azithromycin against antibiotic-resistant Escherichia coli. Front Microbiol 2022; 13:998671. [PMID: 36212888 PMCID: PMC9532765 DOI: 10.3389/fmicb.2022.998671] [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: 07/20/2022] [Accepted: 08/24/2022] [Indexed: 11/24/2022] Open
Abstract
Antimicrobial resistance is a global public health threat. Antibiotic development pipeline has few new drugs; therefore, using antibiotic adjuvants has been envisioned as a successful method to preserve existing medications to fight multidrug-resistant (MDR) pathogens. In this study, we investigated the synergistic effect of a polymyxin derivative known as polymyxin B nonapeptide (PMBN) with azithromycin (AZT). A total of 54 Escherichia coli strains were first characterized for macrolide resistance genes, and susceptibility to different antibiotics, including AZT. A subset of 24 strains was then selected for synergy testing by the checkerboard assay. PMBN was able to re-sensitize the bacteria to AZT, even in strains with high minimum inhibitory concentrations (MIC: 32 to ≥128 μg/ml) for AZT, and in strains resistant to the last resort drugs such as colistin and meropenem. The fractional inhibitory concentration index was lower than 0.5, demonstrating that PMBN and AZT combinations had a synergistic effect. The combinations worked efficiently in strains carrying mphA gene encoding macrolide phosphotransferase which can cause macrolide inactivation. However, the combinations were inactive in strains having an additional ermB gene encoding macrolide methylase which causes ribosomal drug target alteration. Killing kinetics study showed a significant reduction of bacterial growth after 6 h of treatment with complete killing achieved after 24 h. Transmission electron microscopy showed morphological alterations in the bacteria treated with PMBN alone or in combination with AZT, with evidence of damage to the outer membrane. These results suggested that PMBN acted by increasing the permeability of bacterial outer membrane to AZT, which was also evident using a fluorometric assay. Using multiple antimicrobial agents could therefore be a promising strategy in the eradication of MDR bacteria. PMBN is a good candidate for use with other antibiotics to potentiate their activity, but further studies are required in vivo. This will significantly contribute to resolving antimicrobial resistance crisis.
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Affiliation(s)
- Farah Al-Marzooq
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
- *Correspondence: Farah Al-Marzooq,
| | - Akela Ghazawi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Saeed Tariq
- Department of Anatomy, College of Medicine and Health Science, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Lana Daoud
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
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23
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Wang X, Wu K, Zhang H, Liu J, Yang Z, Bai J, Liu H, Shao L. Efficient side-chain deacylation of polymyxin B1 in recombinant Streptomyces strains. Biotechnol Lett 2022; 44:1287-1299. [PMID: 36076042 DOI: 10.1007/s10529-022-03290-7] [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: 05/14/2022] [Accepted: 08/04/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Polymyxins are antibacterial polypeptides used as "last resort" therapy option for multidrug-resistant Gram-negative bacteria. The expansion of polymyxin-resistant infections has inspired development of novel polymyxin derivatives, and deacylation is one of the critical steps in generating those antibiotics. Deacylase from Actinoplanes utahensis hydrolyze the acyl moieties of echinocandins, and also efficiently deacylates daptomycin, ramoplanin and other important antibiotics. Here, deacylase was studied considering its potential usefulness in deacylating polymyxin B1. RESULTS All the six recombinant strains containing the deacylase gene catalyzed hydrolysis of polymyxin B1, yielding cyclic heptapeptides. The efficiency of recombinant S. albus (SAL701) was higher than that of the others, and deacylation was the most efficient at 40 °C in 0.2 M Tris buffer (pH 8.0) with 0.2 M Mg2+. The optimal substrate concentration of SAL701 was increased from 2.0 to 6.0 g/L. SAL701 was highly thermostable, showing no loss of activity at 50 °C for 12 h, and the mycelia could be recycled at least three times without loss of catalytic activity. SAL701 could not deacylate β-lactam substrate such as penicillin G and cephalosporin C. Deacylase catalyzes the amide bond 1 closest to the nucleus of polymyxin B1 rather than the other bond, suggesting that it has high catalytic site specificity. Homology modeling and the docking results implied that Thr190 in deacylase could facilitate hydrolysis with high regioselectivity. CONCLUSIONS These results show that SAL701 is effective in increasing the cyclic heptapeptide moiety of polymyxin B1. These properties of the biocatalyst may enable its development in the industrial production of polymyxins antibiotics.
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Affiliation(s)
- Xiaojing Wang
- Affiliated Zhoupu Hospital, Shanghai University of Medicine and Health Sciences, Shanghai, China.,Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China.,School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Kai Wu
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China.,School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Hanzhi Zhang
- Abiochem Biotechnology Co., Ltd, Shanghai, China
| | - Jing Liu
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China.,School of Medical Technology, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Zhijun Yang
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China.,School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Jing Bai
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou, China
| | - Hao Liu
- Department of Antibiotics and Microorganisms, Shanghai Institute for Food and Drug Control, Shanghai, China.
| | - Lei Shao
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China. .,School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China.
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24
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Wu S, Yin D, Zhi P, Guo Y, Yang Y, Zhu D, Hu F. In Vitro Activity of MRX-8 and Comparators Against Clinical Isolated Gram-Negative Bacilli in China. Front Cell Infect Microbiol 2022; 12:829592. [PMID: 35646734 PMCID: PMC9135056 DOI: 10.3389/fcimb.2022.829592] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 04/20/2022] [Indexed: 11/20/2022] Open
Abstract
To evaluate in vitro antibacterial activity of MRX-8 against gram-negative bacteria recently isolated from China, 765 clinical isolates were collected randomly from 2017 to 2020, including Enterobacterales and P. aeruginosa and A. baumannii, S. maltophilia, B. cepacia, Alcaligenes app. and Haemophilus spp. isolates. All strains were performed with antimicrobial susceptibility testing by broth microdilution method according to the CLSI 2021. Antimicrobial agents included MRX-8, polymyxin B, colistin, amikacin, ceftriaxone, ceftazidime, cefepime, ceftazidime-avibactam, cefoperazone-sulbactam, meropenem, ciprofloxacin, ampicillin, ampicillin-sulbactam and levofloxacin. For carbapenem-susceptible and carbapenem-resistant E.coli isolates, the MIC50/90 of MRX-8 was 0.125/0.25 mg/L and 0.06/0.125 mg/L, respectively. For carbapenem-susceptible and carbapenem-resistant K. pneumoniae isolates, the MIC50/90 of MRX-8 was 0.25/0.5 mg/L and 0.125/0.5 mg/L, respectively. For polymyxins (polymyxin B and colistin)-resistant E. coli and K. pneumoniae, MIC50 of MRX-8 was 4-16 mg/L and MIC90 was >32 mg/L. The MIC50 and MIC90 of MRX-8 for other Klebsiella spp. except K. pneumoniae, Citrobacter spp., S. enterica and Shigella spp. isolates ranged 0.06-0.125 mg/L and 0.06-0.25mg/L, respectively. For Morganella spp., Proteus spp., Providencia spp., Serratia spp., S. maltophilia and B. cepacia, all MIC50 of MRX-8 was >32mg/L. For carbapenem susceptible and resistant P. aeruginosa, the MIC50 and MIC90 of MRX-8 was both 1mg/L, and that for A. baumannii was 0.5mg/L and 0.5-1mg/L. For Alcaligenes spp. and Haemophilus spp., MIC50/90 was 1/4 mg/L and 0.25/0.5 mg/L. MRX-8 was more effective against most clinically isolated gram-negative isolates, including carbapenem-resistant E. coli, K. pneumoniae, P. aeruginosa and A. baumannii, highlighting its potential as valuable therapeutics.
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Affiliation(s)
- Shi Wu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Dandan Yin
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Peiyuan Zhi
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Yan Guo
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Yang Yang
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Demei Zhu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Fupin Hu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
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25
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Gao Y, Dutta S, Wang X. Serendipitous Discovery of a Highly Active and Selective Resistance-Modifying Agent for Colistin-Resistant Gram-Negative Bacteria. ACS OMEGA 2022; 7:12442-12446. [PMID: 35449921 PMCID: PMC9016814 DOI: 10.1021/acsomega.2c01530] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 03/21/2022] [Indexed: 05/03/2023]
Abstract
Antibiotic resistance is a growing global health concern. Colistin is one of the last-resort antibiotics that treats multidrug-resistant (MDR) Gram-negative bacterial infection. However, bacteria resistant to colistin have become increasingly prevalent. Using a bacterial whole-cell screen of a fragment-based library, one compound was discovered to resensitize MDR Escherichia coli AR-0493 to colistin with low mammalian toxicity. Interestingly, postscreening validation studies identified a highly related yet distinct compound as the actual substance responsible for the activity. Further studies showed that this novel resistance-modifying agent is not only very potent but also highly selective to potentiate the activity of polymyxin family antibiotics in a wide range of MDR Gram-negative bacteria. Thus, it may be further developed as a combination therapy to prolong the life span of colistin in the clinic.
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26
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A synthetic lipopeptide targeting top-priority multidrug-resistant Gram-negative pathogens. Nat Commun 2022; 13:1625. [PMID: 35338128 PMCID: PMC8956739 DOI: 10.1038/s41467-022-29234-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 03/07/2022] [Indexed: 11/08/2022] Open
Abstract
The emergence of multidrug-resistant (MDR) Gram-negative pathogens is an urgent global medical challenge. The old polymyxin lipopeptide antibiotics (polymyxin B and colistin) are often the only therapeutic option due to resistance to all other classes of antibiotics and the lean antibiotic drug development pipeline. However, polymyxin B and colistin suffer from major issues in safety (dose-limiting nephrotoxicity, acute toxicity), pharmacokinetics (poor exposure in the lungs) and efficacy (negligible activity against pulmonary infections) that have severely limited their clinical utility. Here we employ chemical biology to systematically optimize multiple non-conserved positions in the polymyxin scaffold, and successfully disconnect the therapeutic efficacy from the toxicity to develop a new synthetic lipopeptide, structurally and pharmacologically distinct from polymyxin B and colistin. This resulted in the clinical candidate F365 (QPX9003) with superior safety and efficacy against lung infections caused by top-priority MDR pathogens Pseudomonas aeruginosa, Acinetobacter baumannii and Klebsiella pneumoniae. Polymyxins are often the last therapeutic option for multidrug-resistant (MDR) bacteria, but have suboptimal safety and efficacy. Here the authors report the discovery and development of a synthetic lipopeptide with an improved safety and efficacy against top-priority MDR Gram-negative pathogens.
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27
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Xu L, She P, Liu Y, Liu S, Li Z, Li Y, Hussain Z, Wu Y. A novel bactericidal small molecule, STK-35, and its derivative, STK-66, as antibacterial agents against Gram-negative pathogenic bacteria in vitro and in vivo. Lett Appl Microbiol 2022; 75:655-666. [PMID: 35218030 DOI: 10.1111/lam.13682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 02/17/2022] [Accepted: 02/18/2022] [Indexed: 11/29/2022]
Abstract
Due to the increasing rate of antibiotic resistance and the emergence of persister cells of Gram-negative pathogenic bacteria, the development of new antibacterial agents is urgently needed to deal with this problem. Our results indicated that both newly identified small molecule STK-35 and its derivative STK-66 exhibited effective antibacterial properties against a variety of Gram-negative pathogens including A. baumannii, E. coli, K. pneumoniae and P. aeruginosa. The minimal inhibitory concentrations (MICs) and minimal bactericidal concentrations (MBCs) ranges were 0.0625-8 μg mL-1 and 0.125-16 μg mL-1 respectively, while no hemolytic activity and mammalian cell cytotoxicity were observed. The time-killing assays showed STK-35/66 had strong bactericidal activity against Gram-negative pathogens. STK-35/66 also showed different degrees of synergistic antibacterial activity with conventional antibiotics and exhibited persister cells killing activity. Moreover, STK-35/66 effectively eradicated the pre-formed biofilms of P. aeruginosa and A. baumannii. In addition, STK-35/66 significantly increased the survival rate of E. coli infected mice and induced a decrease in bacterial load of the peritonitis model. In nutshell, these results suggested that STK-35/66 possessed antimicrobial activity against Gram-negative pathogenic bacteria in vitro and in vivo, which could be considered as potential substitutes for the treatment of Gram-negative pathogenic infections after further structure optimization.
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Affiliation(s)
- Lanlan Xu
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Pengfei She
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Yaqian Liu
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Shasha Liu
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Zehao Li
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Yimin Li
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Zubair Hussain
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Yong Wu
- Department of Laboratory Medicine, Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China.,Department of Laboratory Medicine, The First Hospital of Changsha, Changsha, 410013, Hunan, China
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28
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Ledger EVK, Sabnis A, Edwards AM. Polymyxin and lipopeptide antibiotics: membrane-targeting drugs of last resort. MICROBIOLOGY (READING, ENGLAND) 2022; 168. [PMID: 35118938 PMCID: PMC8941995 DOI: 10.1099/mic.0.001136] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The polymyxin and lipopeptide classes of antibiotics are membrane-targeting drugs of last resort used to treat infections caused by multi-drug-resistant pathogens. Despite similar structures, these two antibiotic classes have distinct modes of action and clinical uses. The polymyxins target lipopolysaccharide in the membranes of most Gram-negative species and are often used to treat infections caused by carbapenem-resistant species such as Escherichia coli, Acinetobacter baumannii and Pseudomonas aeruginosa. By contrast, the lipopeptide daptomycin requires membrane phosphatidylglycerol for activity and is only used to treat infections caused by drug-resistant Gram-positive bacteria such as methicillin-resistant Staphylococcus aureus and vancomycin-resistant enterococci. However, despite having distinct targets, both antibiotic classes cause membrane disruption, are potently bactericidal in vitro and share similarities in resistance mechanisms. Furthermore, there are concerns about the efficacy of these antibiotics, and there is increasing interest in using both polymyxins and daptomycin in combination therapies to improve patient outcomes. In this review article, we will explore what is known about these distinct but structurally similar classes of antibiotics, discuss recent advances in the field and highlight remaining gaps in our knowledge.
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Affiliation(s)
- Elizabeth V K Ledger
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Rd, London, SW7 2AZ, UK
| | - Akshay Sabnis
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Rd, London, SW7 2AZ, UK
| | - Andrew M Edwards
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Rd, London, SW7 2AZ, UK
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29
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Attia TZ, Abdelmajed MA, Omar MA, El-Din KMB. Selective Spectrofluorimetric Protocol for Determination of Commonly Used Gram-negative Bactericidal Drug in Combined Pharmaceutical Dosage Forms and Human Plasma. J Fluoresc 2022; 32:603-612. [PMID: 35013853 DOI: 10.1007/s10895-021-02862-6] [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: 07/09/2021] [Accepted: 11/29/2021] [Indexed: 11/25/2022]
Abstract
Gram-negative bacteria cause infections such as skin infection, meningitis, and pneumonia in human being. Gram-negative bacteria are highly resistant to most availaible bactericidal drugs. One of the most commonly used Gram-negative bactericidal drug is Polymyxin B sulfate (PMS). In addition, it is used in cases of highly resistant Gram-negative bacterial infections. The widespread of PMS necessitate the development of an exceedingly sensitive and selective fluorimetric assay for its determination in pure form, different pharmaceutical dosage forms, and human plasma. The presented method is used to determine PMS in their dosage form (vials) and combined pharmaceutical formulations (skin and eye ointments) with a high degree of accuracy and selectivity. The described procedure relies on the structure of a derivative of a high degree of fluorescence called dihydropyridine, via the condensation of the amino moiety of PMS with two equivalents of acetylacetone in the presence of formaldehyde and Teorell buffer (pH = 3). The fluorescent product was measured at 471 nm (λex = 402 nm). The linearity ranged from 100-3000 ng mL-1 of PMS with an excellent r2 of 0.9998. LOD and LOQ were 27.16 ng mL-1 and 82.30 ng mL-1, respectively. Owing to the developed method's high selectivity, it was successfully utilized for assay of PMS, in the ointment, in the presence of oxytetracycline as an active ingredient. Furthermore, the procedure applied for the estimation of parenteral PMS in human plasma with very good mean recovery 97.42 ± 1.46.
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Affiliation(s)
- Tamer Z Attia
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University, Minia, Egypt.
| | - Mahmoud A Abdelmajed
- Analytical Chemistry Department, Faculty of Pharmacy, Deraya University, New Minia, Egypt
| | - Mahmoud A Omar
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University, Minia, Egypt
- Department of Pharmacognosy and Pharmaceutical Chemistry, College of Pharmacy, Taibah University, Medinah, Saudi Arabia
| | - Khalid M Badr El-Din
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University, Minia, Egypt
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30
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Moon SH, Kaufmann Y, Fujiwara R, Huang E. Enzymatically-crosslinked gelatin hydrogels containing paenipeptin and clarithromycin against carbapenem-resistant pathogen in murine skin wound infection. BMC Microbiol 2021; 21:326. [PMID: 34819026 PMCID: PMC8611911 DOI: 10.1186/s12866-021-02383-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 10/26/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The recent rise and spread of carbapenem-resistant pathogens pose an urgent threat to public health and has fueled the search for new therapies. Localized delivery of topical antibiotics is an alternative for the treatment of infected wounds caused by drug-resistant pathogens. In this study, we aimed to develop antimicrobial-loaded hydrogels for topical treatment of wound infections in a murine skin wound infection. RESULTS Paenipeptin analogue 1, a linear lipopeptide, potentiated clarithromycin against multidrug-resistant Acinetobacter baumannii, Enterobacter cloacae, Escherichia coli, and Klebsiella pneumoniae. Enzymatically-crosslinked gelatin hydrogels were developed to encapsulate paenipeptin analogue 1 and clarithromycin. The encapsulated antimicrobials were gradually released from hydrogels during incubation, reaching 75.43 and 53.66% for paenipeptin and clarithromycin, respectively, at 24 h. The antimicrobial-loaded hydrogels containing paenipeptin and clarithromycin synergistically resulted in 5-log reduction in carbapenem-resistant A. baumannii within 6 h in vitro. Moreover, the antimicrobial-loaded hydrogels reduced 3.6- and 2.5-log of carbapenem-resistant A. baumannii when treated at 4 or 20 h post infection, respectively, in a murine skin wound infection. CONCLUSIONS Enzymatically-crosslinked gelatin hydrogels loaded with paenipeptin analogue 1 and clarithromycin exhibited potent therapeutic efficacy against carbapenem-resistant A. baumannii in murine skin wound infection.
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Affiliation(s)
- Sun Hee Moon
- grid.241054.60000 0004 4687 1637Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205 USA
| | - Yihong Kaufmann
- grid.241054.60000 0004 4687 1637Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205 USA
| | - Ryoichi Fujiwara
- grid.241054.60000 0004 4687 1637Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205 USA
| | - En Huang
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR, 72205, USA.
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Alshabanah LA, Omran N, Elwakil BH, Hamed MT, Abdallah SM, Al-Mutabagani LA, Wang D, Liu Q, Shehata N, Hassanin AH, Hagar M. Elastic Nanofibrous Membranes for Medical and Personal Protection Applications: Manufacturing, Anti-COVID-19, and Anti-Colistin Resistant Bacteria Evaluation. Polymers (Basel) 2021; 13:3987. [PMID: 34833289 PMCID: PMC8624264 DOI: 10.3390/polym13223987] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/06/2021] [Accepted: 11/10/2021] [Indexed: 12/23/2022] Open
Abstract
Herein, in the present work two series of thermoplastic polyurethane (TPU) nanofibers were manufactured using the electrospinning techniques with ZnO and CuO nanoparticles for a potential use as an elastic functional layer in antimicrobial applications. Percentages of 0%, 2 wt%, and 4 wt% of the nanoparticles were used. The morphological characterization of the electrospun TPU and TPU/NPs composites nanofibers were observed by using scanning electron microscopy to show the average fiber diameter and it was in the range of 90-150 nm with a significant impact of the nanoparticle type. Mechanical characterization showed that TPU nanofiber membranes exhibit excellent mechanical properties with ultra-high elastic properties. Elongation at break reached up to 92.5%. The assessment of the developed nanofiber membranes for medical and personal protection applications was done against various colistin resistant bacterial strains and the results showed an increment activity by increasing the metal oxide concentration up to 83% reduction rate by using TPU/ZnO 4% nanofibers against K. pneumoniae strain 10. The bacterial growth was completely eradicated after 8 and 16 h incubation with TPU/ZnO and TPU/CuO nanofibers, respectively. The nanofibers SEM study reveals the adsorption of the bacterial cells on the metal oxides nanofibers surface which led to cell lysis and releasing of their content. Finally, in vitro study against Spike S-protein from SARS-CoV-2 was also evaluated to investigate the potent effectiveness of the proposed nanofibers in the virus deactivation. The results showed that the metal oxide concentration is an effective factor in the antiviral activity due to the observed pattern of increasing the antibacterial and antiviral activity by increasing the metal oxide concentration; however, TPU/ZnO nanofibers showed a potent antiviral activity in relation to TPU/CuO.
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Affiliation(s)
- Latifah Abdullah Alshabanah
- Chemistry Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia; (L.A.A.); (L.A.A.-M.)
| | - Nada Omran
- Science and Technology Institute, Wuhan Textile University, Wuhan 430073, China;
- Centre of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Centre, Alexandria University, Alexandria 21544, Egypt; (N.S.); (A.H.H.)
| | - Bassma H. Elwakil
- Department of Medical Laboratory Technology, Faculty of Applied Health Sciences Technology, Pharos University in Alexandria, Alexandria 21321, Egypt;
| | - Moaaz T. Hamed
- Industrial Microbiology and Applied Chemistry Program, Department of Botany & Microbiology, Faculty of Science, Alexandria University, Alexandria 21568, Egypt;
| | - Salwa M. Abdallah
- Materials Science & Engineering Department, School of Innovative Design Engineering, Egypt-Japan University of Science and Technology (E-JUST), Alexandria 21934, Egypt;
| | - Laila A. Al-Mutabagani
- Chemistry Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia; (L.A.A.); (L.A.A.-M.)
| | - Dong Wang
- Key Laboratory of Textile Fiber and Products (Ministry of Education), Wuhan Textile University, Wuhan 430200, China;
| | - Qiongzhen Liu
- Hubei Key Laboratory of Advanced Textile Materials & Application, Hubei International Scientific and Technological Cooperation Base of Intelligent Textile Materials & Application, Wuhan Textile University, Wuhan 430200, China;
| | - Nader Shehata
- Centre of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Centre, Alexandria University, Alexandria 21544, Egypt; (N.S.); (A.H.H.)
- Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
- USTAR Bioinnovations Centre, Faculty of Science, Utah State University, Logan, UT 84341, USA
- Department of Physics, School of Engineering, Kuwait College of Science and Technology (KCST), Doha Superior Rd., Jahraa 13133, Kuwait
| | - Ahmed H. Hassanin
- Centre of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Centre, Alexandria University, Alexandria 21544, Egypt; (N.S.); (A.H.H.)
- Materials Science & Engineering Department, School of Innovative Design Engineering, Egypt-Japan University of Science and Technology (E-JUST), Alexandria 21934, Egypt
- Department of Textile Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
| | - Mohamed Hagar
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria 21321, Egypt
- Chemistry Department, College of Sciences, Taibah University, Yanbu 30799, Saudi Arabia
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32
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Zaknoon F, Meir O, Mor A. Mechanistic Studies of Antibiotic Adjuvants Reducing Kidney's Bacterial Loads upon Systemic Monotherapy. Pharmaceutics 2021; 13:pharmaceutics13111947. [PMID: 34834362 PMCID: PMC8621570 DOI: 10.3390/pharmaceutics13111947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/11/2021] [Accepted: 11/14/2021] [Indexed: 12/01/2022] Open
Abstract
We describe the design and attributes of a linear pentapeptide-like derivative (C14(ω5)OOc10O) screened for its ability to elicit bactericidal competences of plasma constituents against Gram-negative bacteria (GNB). In simpler culture media, the lipopeptide revealed high aptitudes to sensitize resilient GNB to hydrophobic and/or efflux-substrate antibiotics, whereas in their absence, C14(ω5)OOc10O only briefly delayed bacterial proliferation. Instead, at low micromolar concentrations, the lipopeptide has rapidly lowered bacterial proton and ATP levels, although significantly less than upon treatment with its bactericidal analog. Mechanistic studies support a two-step scenario providing a plausible explanation for the lipopeptide’s biological outcomes against GNB: initially, C14(ω5)OOc10O permeabilizes the outer membrane similarly to polymyxin B, albeit in a manner not necessitating as much LPS-binding affinity. Subsequently, C14(ω5)OOc10O would interact with the inner membrane gently yet intensively enough to restrain membrane-protein functions such as drug efflux and/or ATP generation, while averting the harsher inner membrane perturbations that mediate the fatal outcome associated with bactericidal peers. Preliminary in vivo studies where skin wound infections were introduced in mice, revealed a significant efficacy in affecting bacterial viability upon topical treatment with creams containing C14(ω5)OOc10O, whereas synergistic combination therapies were able to secure the pathogen’s eradication. Further, capitalizing on the finding that C14(ω5)OOc10O plasma-potentiating concentrations were attainable in mice blood at sub-maximal tolerated doses, we used a urinary tract infection model to acquire evidence for the lipopeptide’s systemic capacity to reduce the kidney’s bacterial loads. Collectively, the data establish the role of C14(ω5)OOc10O as a compelling antibacterial potentiator and suggest its drug-like potential.
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33
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Mülner P, Schwarz E, Dietel K, Herfort S, Jähne J, Lasch P, Cernava T, Berg G, Vater J. Fusaricidins, Polymyxins and Volatiles Produced by Paenibacillus polymyxa Strains DSM 32871 and M1. Pathogens 2021; 10:pathogens10111485. [PMID: 34832640 PMCID: PMC8621861 DOI: 10.3390/pathogens10111485] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/09/2021] [Accepted: 11/09/2021] [Indexed: 01/18/2023] Open
Abstract
Paenibacilli are efficient producers of potent agents against bacterial and fungal pathogens, which are of great interest both for therapeutic applications in medicine as well as in agrobiotechnology. Lipopeptides produced by such organisms play a major role in their potential to inactivate pathogens. In this work we investigated two lipopeptide complexes, the fusaricidins and the polymyxins, produced by Paenibacillus polymyxa strains DSM 32871 and M1 by MALDI-TOF mass spectrometry. The fusaricidins show potent antifungal activities and are distinguished by an unusual variability. For strain DSM 32871 we identified numerous yet unknown variants mass spectrometrically. DSM 32871 produces polymyxins of type E (colistins), while M1 forms polymyxins P. For both strains, novel but not yet completely characterized polymyxin species were detected, which possibly are glycosylated. These compounds may be of interest therapeutically, because polymyxins have gained increasing attention as last-resort antibiotics against multiresistant pathogenic Gram-negative bacteria. In addition, the volatilomes of DSM 32781 and M1 were investigated with a GC–MS approach using different cultivation media. Production of volatile organic compounds (VOCs) was strain and medium dependent. In particular, strain M1 manifested as an efficient VOC-producer that exhibited formation of 25 volatiles in total. A characteristic feature of Paenibacilli is the formation of volatile pyrazine derivatives.
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Affiliation(s)
- Pascal Mülner
- ABITEP GmbH, Glienicker Weg 185, 12489 Berlin, Germany; (P.M.); (E.S.); (K.D.)
- Institute of Environmental Biotechnology, Graz University of Technology, Petergasse 12, 8010 Graz, Austria; (T.C.); (G.B.)
| | - Elisa Schwarz
- ABITEP GmbH, Glienicker Weg 185, 12489 Berlin, Germany; (P.M.); (E.S.); (K.D.)
| | - Kristin Dietel
- ABITEP GmbH, Glienicker Weg 185, 12489 Berlin, Germany; (P.M.); (E.S.); (K.D.)
| | - Stefanie Herfort
- Robert Koch-Institut, ZBS6, Proteomics and Spectroscopy, Seestr 10, 13353 Berlin, Germany; (S.H.); (J.J.); (P.L.)
| | - Jennifer Jähne
- Robert Koch-Institut, ZBS6, Proteomics and Spectroscopy, Seestr 10, 13353 Berlin, Germany; (S.H.); (J.J.); (P.L.)
| | - Peter Lasch
- Robert Koch-Institut, ZBS6, Proteomics and Spectroscopy, Seestr 10, 13353 Berlin, Germany; (S.H.); (J.J.); (P.L.)
| | - Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology, Petergasse 12, 8010 Graz, Austria; (T.C.); (G.B.)
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, Petergasse 12, 8010 Graz, Austria; (T.C.); (G.B.)
| | - Joachim Vater
- Robert Koch-Institut, ZBS6, Proteomics and Spectroscopy, Seestr 10, 13353 Berlin, Germany; (S.H.); (J.J.); (P.L.)
- Correspondence:
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34
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Combination of Derivatization–HPLC–MS and Enzymatic Hydrolysis–Edman Degradation for Amino Acid Sequence and Configuration of Polymyxin B Components. Chromatographia 2021. [DOI: 10.1007/s10337-021-04091-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Li W, Separovic F, O'Brien-Simpson NM, Wade JD. Chemically modified and conjugated antimicrobial peptides against superbugs. Chem Soc Rev 2021; 50:4932-4973. [PMID: 33710195 DOI: 10.1039/d0cs01026j] [Citation(s) in RCA: 201] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Antimicrobial resistance (AMR) is one of the greatest threats to human health that, by 2050, will lead to more deaths from bacterial infections than cancer. New antimicrobial agents, both broad-spectrum and selective, that do not induce AMR are urgently required. Antimicrobial peptides (AMPs) are a novel class of alternatives that possess potent activity against a wide range of Gram-negative and positive bacteria with little or no capacity to induce AMR. This has stimulated substantial chemical development of novel peptide-based antibiotics possessing improved therapeutic index. This review summarises recent synthetic efforts and their impact on analogue design as well as their various applications in AMP development. It includes modifications that have been reported to enhance antimicrobial activity including lipidation, glycosylation and multimerization through to the broad application of novel bio-orthogonal chemistry, as well as perspectives on the direction of future research. The subject area is primarily the development of next-generation antimicrobial agents through selective, rational chemical modification of AMPs. The review further serves as a guide toward the most promising directions in this field to stimulate broad scientific attention, and will lead to new, effective and selective solutions for the several biomedical challenges to which antimicrobial peptidomimetics are being applied.
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Affiliation(s)
- Wenyi Li
- Melbourne Dental School, Centre for Oral Health Research, University of Melbourne, VIC 3010, Australia. and Bio21 Institute, University of Melbourne, VIC 3010, Australia
| | - Frances Separovic
- Bio21 Institute, University of Melbourne, VIC 3010, Australia and School of Chemistry, University of Melbourne, VIC 3010, Australia
| | - Neil M O'Brien-Simpson
- Melbourne Dental School, Centre for Oral Health Research, University of Melbourne, VIC 3010, Australia. and Bio21 Institute, University of Melbourne, VIC 3010, Australia
| | - John D Wade
- School of Chemistry, University of Melbourne, VIC 3010, Australia and The Florey Institute of Neuroscience and Mental Health, University of Melbourne, VIC 3010, Australia.
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36
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De Oliveira DMP, Bohlmann L, Conroy T, Jen FEC, Everest-Dass A, Hansford KA, Bolisetti R, El-Deeb IM, Forde BM, Phan MD, Lacey JA, Tan A, Rivera-Hernandez T, Brouwer S, Keller N, Kidd TJ, Cork AJ, Bauer MJ, Cook GM, Davies MR, Beatson SA, Paterson DL, McEwan AG, Li J, Schembri MA, Blaskovich MAT, Jennings MP, McDevitt CA, von Itzstein M, Walker MJ. Repurposing a neurodegenerative disease drug to treat Gram-negative antibiotic-resistant bacterial sepsis. Sci Transl Med 2021; 12:12/570/eabb3791. [PMID: 33208501 DOI: 10.1126/scitranslmed.abb3791] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 10/30/2020] [Indexed: 12/15/2022]
Abstract
The emergence of polymyxin resistance in carbapenem-resistant and extended-spectrum β-lactamase (ESBL)-producing bacteria is a critical threat to human health, and alternative treatment strategies are urgently required. We investigated the ability of the hydroxyquinoline analog ionophore PBT2 to restore antibiotic sensitivity in polymyxin-resistant, ESBL-producing, carbapenem-resistant Gram-negative human pathogens. PBT2 resensitized Klebsiella pneumoniae, Escherichia coli, Acinetobacter baumannii, and Pseudomonas aeruginosa to last-resort polymyxin class antibiotics, including the less toxic next-generation polymyxin derivative FADDI-287, in vitro. We were unable to select for mutants resistant to PBT2 + FADDI-287 in polymyxin-resistant E. coli containing a plasmid-borne mcr-1 gene or K. pneumoniae carrying a chromosomal mgrB mutation. Using a highly invasive K. pneumoniae strain engineered for polymyxin resistance through mgrB mutation, we successfully demonstrated the efficacy of PBT2 + polymyxin (colistin or FADDI-287) for the treatment of Gram-negative sepsis in immunocompetent mice. In comparison to polymyxin alone, the combination of PBT2 + polymyxin improved survival and reduced bacterial dissemination to the lungs and spleen of infected mice. These data present a treatment modality to break antibiotic resistance in high-priority polymyxin-resistant Gram-negative pathogens.
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Affiliation(s)
- David M P De Oliveira
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Lisa Bohlmann
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Trent Conroy
- Institute for Glycomics, Griffith University, Queensland 4222, Australia
| | - Freda E-C Jen
- Institute for Glycomics, Griffith University, Queensland 4222, Australia
| | - Arun Everest-Dass
- Institute for Glycomics, Griffith University, Queensland 4222, Australia
| | - Karl A Hansford
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Raghu Bolisetti
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Ibrahim M El-Deeb
- Institute for Glycomics, Griffith University, Queensland 4222, Australia
| | - Brian M Forde
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia.,Centre for Clinical Research and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4029, Australia
| | - Minh-Duy Phan
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Jake A Lacey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Victoria 3000, Australia
| | - Aimee Tan
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Victoria 3000, Australia
| | - Tania Rivera-Hernandez
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia.,Consejo Nacional de Ciencia y Tecnología-Unidad de Investigación Médica en Inmunoquímica, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City 06720, Mexico
| | - Stephan Brouwer
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Nadia Keller
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Timothy J Kidd
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Amanda J Cork
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Michelle J Bauer
- Centre for Clinical Research and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4029, Australia
| | - Gregory M Cook
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand
| | - Mark R Davies
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Victoria 3000, Australia
| | - Scott A Beatson
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - David L Paterson
- Centre for Clinical Research and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4029, Australia
| | - Alastair G McEwan
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Jian Li
- Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria 3800, Australia
| | - Mark A Schembri
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia
| | - Mark A T Blaskovich
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Michael P Jennings
- Institute for Glycomics, Griffith University, Queensland 4222, Australia
| | - Christopher A McDevitt
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Victoria 3000, Australia
| | - Mark von Itzstein
- Institute for Glycomics, Griffith University, Queensland 4222, Australia
| | - Mark J Walker
- School of Chemistry and Molecular Biosciences and Australian Infectious Diseases Research Centre, The University of Queensland, Queensland 4072, Australia.
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37
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Chen SP, Chen EHL, Yang SY, Kuo PS, Jan HM, Yang TC, Hsieh MY, Lee KT, Lin CH, Chen RPY. A Systematic Study of the Stability, Safety, and Efficacy of the de novo Designed Antimicrobial Peptide PepD2 and Its Modified Derivatives Against Acinetobacter baumannii. Front Microbiol 2021; 12:678330. [PMID: 34220763 PMCID: PMC8250858 DOI: 10.3389/fmicb.2021.678330] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/27/2021] [Indexed: 12/12/2022] Open
Abstract
Searching for new antimicrobials is a pressing issue to conquer the emergence of multidrug-resistant (MDR) bacteria and fungi. Antimicrobial peptides (AMPs) usually have antimicrobial mechanisms different from those of traditional antibiotics and bring new hope in the discovery of new antimicrobials. In addition to antimicrobial activity, stability and target selectivity are important concerns to decide whether an antimicrobial peptide can be applied in vivo. Here, we used a simple de novo designed peptide, pepD2, which contains only three kinds of amino acid residues (W, K, L), as an example to evaluate how the residues and modifications affect the antimicrobial activity against Acinetobacter baumannii, stability in plasma, and toxicity to human HEK293 cells. We found that pepI2 with a Leu→Ile substitution can decrease the minimum bactericidal concentrations (MBC) against A. baumannii by one half (4 μg/mL). A D-form peptide, pepdD2, in which the D-enantiomers replaced the L-enantiomers of the Lys(K) and Leu(L) residues, extended the peptide half-life in plasma by more than 12-fold. PepD3 is 3-residue shorter than pepD2. Decreasing peptide length did not affect antimicrobial activity but increased the IC50 to HEK293 cells, thus increased the selectivity index (SI) between A. baumannii and HEK293 cells from 4.7 to 8.5. The chain length increase of the N-terminal acyl group and the Lys→Arg substitution greatly enhanced the hemolytic activity, hence those modifications are not good for clinical application. Unlike colistin, the action mechanism of our peptides relies on negatively charged lipids rather than lipopolysaccharides. Therefore, not only gram-negative bacteria but also gram-positive bacteria can be killed by our peptides.
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Affiliation(s)
- Sung-Pang Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Eric H-L Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Sheng-Yung Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Pin-Shin Kuo
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Tsai-Chen Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Ming-Yen Hsieh
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Kung-Ta Lee
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Rita P-Y Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
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38
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Outer membrane and phospholipid composition of the target membrane affect the antimicrobial potential of first- and second-generation lipophosphonoxins. Sci Rep 2021; 11:10446. [PMID: 34001940 PMCID: PMC8129119 DOI: 10.1038/s41598-021-89883-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 04/27/2021] [Indexed: 02/03/2023] Open
Abstract
Lipophosphonoxins (LPPOs) are small modular synthetic antibacterial compounds that target the cytoplasmic membrane. First-generation LPPOs (LPPO I) exhibit an antimicrobial activity against Gram-positive bacteria; however they do not exhibit any activity against Gram-negatives. Second-generation LPPOs (LPPO II) also exhibit broadened activity against Gram-negatives. We investigated the reasons behind this different susceptibility of bacteria to the two generations of LPPOs using model membranes and the living model bacteria Bacillus subtilis and Escherichia coli. We show that both generations of LPPOs form oligomeric conductive pores and permeabilize the bacterial membrane of sensitive cells. LPPO activity is not affected by the value of the target membrane potential, and thus they are also active against persister cells. The insensitivity of Gram-negative bacteria to LPPO I is probably caused by the barrier function of the outer membrane with LPS. LPPO I is almost incapable of overcoming the outer membrane in living cells, and the presence of LPS in liposomes substantially reduces their activity. Further, the antimicrobial activity of LPPO is also influenced by the phospholipid composition of the target membrane. A higher proportion of phospholipids with neutral charge such as phosphatidylethanolamine or phosphatidylcholine reduces the LPPO permeabilizing potential.
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39
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Li J, Guan D, Chen F, Shi W, Lan L, Huang W. Total and Semisyntheses of Polymyxin Analogues with 2-Thr or 10-Thr Modifications to Decipher the Structure-Activity Relationship and Improve the Antibacterial Activity. J Med Chem 2021; 64:5746-5765. [PMID: 33909428 DOI: 10.1021/acs.jmedchem.0c02217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Herein, we report the total and semisyntheses of a series of polymyxin analogues with 2-Thr and 10-Thr modifications to reveal the structure-activity relationship (SAR), which has not been fully elucidated previously. We employed two total-synthetic strategies to facilitate the diversified replacements on 2-Thr or 10-Thr, respectively. Moreover, semisynthetic approaches were utilized to achieve selective esterification of 2-Thr or dual esterification of both 2- and 10-Thr. Based on the results of in vitro antibacterial assays, SAR analysis implicated that the replacement of 2-/10-Thr with amino acids carrying hydrophobic side chains can maintain the activity against Pseudomonas aeruginosa but had varied effects on other tested Gram-negative bacteria. The aminoacetyl esterification on 2-/10-Thr achieved excellent antibacterial activity, and the compound 76 exhibited 2-8-fold higher activity against different strains and lower toxicity toward the HK-2 cell line. This work explored the SAR of polymyxin 2-/10-Thr and provided a promising strategy for the development of novel polymyxin derivatives.
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Affiliation(s)
- Jian Li
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China.,School of Pharmaceutical Science and Technology, Hangzhou Institute of Advanced Study, Hangzhou 310024, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Dongliang Guan
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China
| | - Feifei Chen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Weiwei Shi
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Lefu Lan
- School of Pharmaceutical Science and Technology, Hangzhou Institute of Advanced Study, Hangzhou 310024, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Wei Huang
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China.,School of Pharmaceutical Science and Technology, Hangzhou Institute of Advanced Study, Hangzhou 310024, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
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Brown P, Abdulle O, Boakes S, Divall N, Duperchy E, Ganeshwaran S, Lester R, Moss S, Rivers D, Simonovic M, Singh J, Stanway S, Wilson A, Dawson MJ. Influence of Lipophilicity on the Antibacterial Activity of Polymyxin Derivatives and on Their Ability to Act as Potentiators of Rifampicin. ACS Infect Dis 2021; 7:894-905. [PMID: 33688718 DOI: 10.1021/acsinfecdis.0c00917] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Novel polymyxin derivatives are often classified either as having direct activity against Gram-negative pathogens or as compounds inactive in their own right, which through permeabilization of the outer membrane act as potentiators of other antibiotics. Here, we report the systematic investigation of the influence of lipophilicity on microbiological activity (including against strains with reduced susceptibility to polymyxins), potentiation of rifampicin, and in vitro toxicity within a series of next-generation polymyxin nonapeptides. We demonstrate that the lipophilicity at the N-terminus and amino acids 6 and 7 in the cyclic peptide core is interchangeable and that the activity, ability to potentiate, and cytotoxicity all appear to be primarily driven by overall lipophilicity. Our work also suggests that the characterization of a polymyxin molecule as either a direct acting compound or a potentiator is more of a continuum that is strongly influenced by lipophilicity rather than as a result of fundamentally different modes-of-action.
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Affiliation(s)
- Pamela Brown
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
- Spero Therapeutics Inc., 675 Massachusetts Avenue, 14th Floor, Cambridge, Massachusetts 02139, United States
| | - Omar Abdulle
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Steven Boakes
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Naomi Divall
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Esther Duperchy
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Sonia Ganeshwaran
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Roy Lester
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Stephen Moss
- Eurofins Integrated Discovery UK Ltd., Fyfield Business & Research Park, Fyfield Road, Ongar, Essex CM5 0GS, United Kingdom
| | - Dean Rivers
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Mona Simonovic
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Jaspal Singh
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
| | - Steven Stanway
- Eurofins Integrated Discovery UK Ltd., Fyfield Business & Research Park, Fyfield Road, Ongar, Essex CM5 0GS, United Kingdom
| | - Antoinette Wilson
- Eurofins Integrated Discovery UK Ltd., Fyfield Business & Research Park, Fyfield Road, Ongar, Essex CM5 0GS, United Kingdom
| | - Michael J. Dawson
- Cantab Anti-Infectives Ltd., BioPark, Broadwater Road, Welwyn Garden City AL7 3AX, United Kingdom
- Spero Therapeutics Inc., 675 Massachusetts Avenue, 14th Floor, Cambridge, Massachusetts 02139, United States
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Abstract
Antibiotic resistance is a major global health challenge and, worryingly, several key Gram negative pathogens can become resistant to most currently available antibiotics. Polymyxins have been revived as a last-line therapeutic option for the treatment of infections caused by multidrug-resistant Gram negative bacteria, in particular Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacterales. Polymyxins were first discovered in the late 1940s but were abandoned soon after their approval in the late 1950s as a result of toxicities (e.g., nephrotoxicity) and the availability of "safer" antibiotics approved at that time. Therefore, knowledge on polymyxins had been scarce until recently, when enormous efforts have been made by several research teams around the world to elucidate the chemical, microbiological, pharmacokinetic/pharmacodynamic, and toxicological properties of polymyxins. One of the major achievements is the development of the first scientifically based dosage regimens for colistin that are crucial to ensure its safe and effective use in patients. Although the guideline has not been developed for polymyxin B, a large clinical trial is currently being conducted to optimize its clinical use. Importantly, several novel, safer polymyxin-like lipopeptides are developed to overcome the nephrotoxicity, poor efficacy against pulmonary infections, and narrow therapeutic windows of the currently used polymyxin B and colistin. This review discusses the latest achievements on polymyxins and highlights the major challenges ahead in optimizing their clinical use and discovering new-generation polymyxins. To save lives from the deadly infections caused by Gram negative "superbugs," every effort must be made to improve the clinical utility of the last-line polymyxins. SIGNIFICANCE STATEMENT: Antimicrobial resistance poses a significant threat to global health. The increasing prevalence of multidrug-resistant (MDR) bacterial infections has been highlighted by leading global health organizations and authorities. Polymyxins are a last-line defense against difficult-to-treat MDR Gram negative pathogens. Unfortunately, the pharmacological information on polymyxins was very limited until recently. This review provides a comprehensive overview on the major achievements and challenges in polymyxin pharmacology and clinical use and how the recent findings have been employed to improve clinical practice worldwide.
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Affiliation(s)
- Sue C Nang
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria, Australia (S.C.N., M.A.K.A., J.L.); Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia (T.V.); and Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana (Q.T.Z.)
| | - Mohammad A K Azad
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria, Australia (S.C.N., M.A.K.A., J.L.); Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia (T.V.); and Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana (Q.T.Z.)
| | - Tony Velkov
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria, Australia (S.C.N., M.A.K.A., J.L.); Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia (T.V.); and Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana (Q.T.Z.)
| | - Qi Tony Zhou
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria, Australia (S.C.N., M.A.K.A., J.L.); Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia (T.V.); and Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana (Q.T.Z.)
| | - Jian Li
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria, Australia (S.C.N., M.A.K.A., J.L.); Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia (T.V.); and Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana (Q.T.Z.)
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Upert G, Luther A, Obrecht D, Ermert P. Emerging peptide antibiotics with therapeutic potential. MEDICINE IN DRUG DISCOVERY 2021; 9:100078. [PMID: 33398258 PMCID: PMC7773004 DOI: 10.1016/j.medidd.2020.100078] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/15/2020] [Accepted: 12/27/2020] [Indexed: 02/09/2023] Open
Abstract
This review covers some of the recent progress in the field of peptide antibiotics with a focus on compounds with novel or established mode of action and with demonstrated efficacy in animal infection models. Novel drug discovery approaches, linear and macrocyclic peptide antibiotics, lipopeptides like the polymyxins as well as peptides addressing targets located in the plasma membrane or in the outer membrane of bacterial cells are discussed.
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Key Words
- ADMET, absorption, distribution, metabolism and excretion – toxicity in pharmacokinetics
- AMP, antimicrobial peptide
- AMR, antimicrobial resistance
- ATCC, ATCC cell collection
- Antibiotic
- BAM, β-barrel assembly machinery
- CC50, cytotoxic concentration to kill 50% of cells
- CD, circular dichroism
- CFU, colony forming unit
- CLSI, clinical and laboratory standards institute
- CMS, colistin methane sulfonate
- DMPC, 1,2-dimyristoyl-sn-glycero-3-phosphocholine
- ESKAPE, acronym encompassing six bacterial pathogens (often carrying antibiotic resistance): Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumonia, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter spp
- FDA, U. S. Food and Drug Administration
- HABP, hospital acquired bacterial pneumonia
- HDP, host-defense peptide
- HEK293, human embryonic kidney 293 cells
- HK-2, human kidney 2 cells (proximal tubular cell line)
- HepG2, human hepatocellular carcinoma cell line
- Hpg, 4-hydroxy-phenyl glycine
- ITC, isothermal titration calorimetry
- KPC, Klebsiella pneumoniae metallo-β-lactamase C resistant
- LPS, lipopolysaccharide
- LptA, lipopolysaccharide transport protein A
- LptC, lipopolysaccharide transport protein C
- LptD, lipopolysaccharide transport protein D
- MDR, multidrug-resistant
- MH-I, Müller-Hinton broth I
- MH-II, Müller-Hinton broth II (cation adjusted)
- MIC, minimal inhibitory concentration
- MRSA, methicilline-resistant S. aureus
- MSSA, methicilline-sensitive S. aureus
- MoA, mechanism (mode) of action
- NDM-1, New Delhi metallo-β-lactamase resistant
- NOAEL, no adverse effect level
- ODL, odilorhabdin
- OMPTA (outer membrane targeting antibiotic)
- OMPTA, outer membrane targeting antibiotic
- Omp, outer membrane protein
- PBMC, peripheral mononuclear blood cell
- PBP, penicillin-binding protein
- PBS, phosphate-buffered saline
- PK, pharmacokinetics
- POPC, 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine
- POPG, 2-oleoyl-1-palmitoyl-sn-glycero-3-phospho-(1-glycerol)
- PrAMPs, polyproline antimicrobial peptides
- RBC, red blood cell
- SAR, structure-activity relationship
- SPR, surface plasmon resonance
- SPase I, signal peptidase I
- VABP, ventilator associated bacterial pneumonia
- VIM-1, beta-lactamase 2 (K. pneumoniae)
- VISA, vancomycin-intermediate S. aureus
- VRE, vancomycin-resistant enterococcus
- WHO, World Health Organization
- WT, wild type
- WTA, wall teichoic acid
- XDR, extremely drug-resistant
- antimicrobial peptide
- antimicrobial resistance
- bid, bis in die (two times a day)
- i.p., intraperitoneal
- i.v., intravenous
- lipopeptide
- mITT population, minimal intend-to-treat population
- peptide antibiotic
- s.c., subcutaneous
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Affiliation(s)
- Gregory Upert
- Polyphor Ltd, Hegenheimermattweg 125, 4123 Allschwil, Switzerland
| | - Anatol Luther
- Bachem AG, Hauptstrasse 114, 4416 Bubendorf, Switzerland
| | - Daniel Obrecht
- Polyphor Ltd, Hegenheimermattweg 125, 4123 Allschwil, Switzerland
| | - Philipp Ermert
- Polyphor Ltd, Hegenheimermattweg 125, 4123 Allschwil, Switzerland
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Kong Q, Yang Y. Recent advances in antibacterial agents. Bioorg Med Chem Lett 2021; 35:127799. [PMID: 33476772 DOI: 10.1016/j.bmcl.2021.127799] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/10/2021] [Accepted: 01/11/2021] [Indexed: 12/12/2022]
Abstract
Antimicrobial resistance is a global challenge and the effectiveness of old antibiotics is decreasing. Discovery and development of antibacterial agents have been accelerated to replenish the arsenal of antibiotics which is limited and shrinking. In recent years, significant advances have achieved in the antibacterial area, including new compounds of known classes and new compounds with new mechanisms. This review summarizes these advances and provides perspective on future directions of antibacterial agents.
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Affiliation(s)
- Qidi Kong
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing 100049, China
| | - Yushe Yang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing 100049, China.
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44
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Bi-Functional Alginate Oligosaccharide-Polymyxin Conjugates for Improved Treatment of Multidrug-Resistant Gram-Negative Bacterial Infections. Pharmaceutics 2020; 12:pharmaceutics12111080. [PMID: 33187332 PMCID: PMC7696216 DOI: 10.3390/pharmaceutics12111080] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 02/06/2023] Open
Abstract
The recent emergence of resistance to colistin, an antibiotic of last resort with dose-limiting toxicity, has highlighted the need for alternative approaches to combat infection. This study aimed to generate and characterise alginate oligosaccharide (“OligoG”)–polymyxin (polymyxin B and E (colistin)) conjugates to improve the effectiveness of these antibiotics. OligoG–polymyxin conjugates (amide- or ester-linked), with molecular weights of 5200–12,800 g/mol and antibiotic loading of 6.1–12.9% w/w, were reproducibly synthesised. In vitro inflammatory cytokine production (tumour necrosis factor alpha (TNFα) ELISA) and cytotoxicity (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) of colistin (2.2–9.3-fold) and polymyxin B (2.9–27.2-fold) were significantly decreased by OligoG conjugation. Antimicrobial susceptibility tests (minimum inhibitory concentration (MIC), growth curves) demonstrated similar antimicrobial efficacy of ester- and amide-linked conjugates to that of the parent antibiotic but with more sustained inhibition of bacterial growth. OligoG–polymyxin conjugates exhibited improved selectivity for Gram-negative bacteria in comparison to mammalian cells (approximately 2–4-fold). Both OligoG–colistin conjugates caused significant disruption of Pseudomonas aeruginosa biofilm formation and induced bacterial death (confocal laser scanning microscopy). When conjugates were tested in an in vitro “time-to-kill” (TTK) model using Acinetobacter baumannii, only ester-linked conjugates reduced viable bacterial counts (~2-fold) after 4 h. Bi-functional OligoG–polymyxin conjugates have potential therapeutic benefits in the treatment of multidrug-resistant (MDR) Gram-negative bacterial infections, directly reducing toxicity whilst retaining antimicrobial and antibiofilm activities.
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Huwaitat R, Coulter SM, Porter SL, Pentlavalli S, Laverty G. Antibacterial and antibiofilm efficacy of synthetic polymyxin‐mimetic lipopeptides. Pept Sci (Hoboken) 2020. [DOI: 10.1002/pep2.24188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Rawan Huwaitat
- Biofunctional Nanomaterials Group School of Pharmacy, Queen's University Belfast, Medical Biology Centre Belfast N. Ireland UK
- Department of Pharmacy Al‐Zaytoonah University of Jordan Amman Jordan
| | - Sophie M. Coulter
- Biofunctional Nanomaterials Group School of Pharmacy, Queen's University Belfast, Medical Biology Centre Belfast N. Ireland UK
| | - Simon L. Porter
- Biofunctional Nanomaterials Group School of Pharmacy, Queen's University Belfast, Medical Biology Centre Belfast N. Ireland UK
| | - Sreekanth Pentlavalli
- Biofunctional Nanomaterials Group School of Pharmacy, Queen's University Belfast, Medical Biology Centre Belfast N. Ireland UK
| | - Garry Laverty
- Biofunctional Nanomaterials Group School of Pharmacy, Queen's University Belfast, Medical Biology Centre Belfast N. Ireland UK
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Pi H, Nguyen HT, Venter H, Boileau AR, Woolford L, Garg S, Page SW, Russell CC, Baker JR, McCluskey A, O'Donovan LA, Trott DJ, Ogunniyi AD. In vitro Activity of Robenidine Analog NCL195 in Combination With Outer Membrane Permeabilizers Against Gram-Negative Bacterial Pathogens and Impact on Systemic Gram-Positive Bacterial Infection in Mice. Front Microbiol 2020; 11:1556. [PMID: 32849325 PMCID: PMC7417630 DOI: 10.3389/fmicb.2020.01556] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 06/16/2020] [Indexed: 12/12/2022] Open
Abstract
Multidrug-resistant (MDR) pathogens, particularly the ESKAPE group (Enterococcus faecalis/faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Escherichia coli, and Enterobacter spp.), have become a public health threat worldwide. Development of new antimicrobial classes and the use of drugs in combination are potential strategies to treat MDR ESKAPE pathogen infections and promote optimal antimicrobial stewardship. Here, the in vitro antimicrobial activity of robenidine analog NCL195 alone or in combination with different concentrations of three outer membrane permeabilizers [ethylenediaminetetraacetic acid (EDTA), polymyxin B nonapeptide (PMBN), and polymyxin B (PMB)] was further evaluated against clinical isolates and reference strains of key Gram-negative bacteria. NCL195 alone was bactericidal against Neisseria meningitidis and Neisseria gonorrhoeae (MIC/MBC = 32 μg/mL) and demonstrated synergistic activity against P. aeruginosa, E. coli, K. pneumoniae, and Enterobacter spp. strains in the presence of subinhibitory concentrations of EDTA, PMBN, or PMB. The additive and/or synergistic effects of NCL195 in combination with EDTA, PMBN, or PMB are promising developments for a new chemical class scaffold to treat Gram-negative infections. Tokuyasu cryo ultramicrotomy was used to visualize the effect of NCL195 on bioluminescent S. aureus membrane morphology. Additionally, NCL195’s favorable pharmacokinetic and pharmacodynamic profile was further explored in in vivo safety studies in mice and preliminary efficacy studies against Gram-positive bacteria. Mice administered two doses of NCL195 (50 mg/kg) by the intraperitoneal (IP) route 4 h apart showed no adverse clinical effects and no observable histological effects in major organs. In bioluminescent Streptococcus pneumoniae and S. aureus murine sepsis challenge models, mice that received two 50 mg/kg doses of NCL195 4 or 6 h apart exhibited significantly reduced bacterial loads and longer survival times than untreated mice. However, further medicinal chemistry and pharmaceutical development to improve potency, solubility, and selectivity is required before efficacy testing in Gram-negative infection models.
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Affiliation(s)
- Hongfei Pi
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Hang Thi Nguyen
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia.,Department of Pharmacology, Toxicology, Internal Medicine and Diagnostics, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Henrietta Venter
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
| | - Alexandra R Boileau
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Lucy Woolford
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Sanjay Garg
- Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
| | | | - Cecilia C Russell
- Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, Australia
| | - Jennifer R Baker
- Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, Australia
| | - Adam McCluskey
- Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, Australia
| | - Lisa A O'Donovan
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food & Wine, The University of Adelaide, Urrbrae, SA, Australia
| | - Darren J Trott
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Abiodun D Ogunniyi
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
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Aye SM, Galani I, Yu H, Wang J, Chen K, Wickremasinghe H, Karaiskos I, Bergen PJ, Zhao J, Velkov T, Giamarellou H, Lin YW, Tsuji BT, Li J. Polymyxin Triple Combinations against Polymyxin-Resistant, Multidrug-Resistant, KPC-Producing Klebsiella pneumoniae. Antimicrob Agents Chemother 2020; 64:e00246-20. [PMID: 32393492 PMCID: PMC7526826 DOI: 10.1128/aac.00246-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 05/05/2020] [Indexed: 02/06/2023] Open
Abstract
Resistance to polymyxin antibiotics is increasing. Without new antibiotic classes, combination therapy is often required. We systematically investigated bacterial killing with polymyxin-based combinations against multidrug-resistant (including polymyxin-resistant), carbapenemase-producing Klebsiella pneumoniae Monotherapies and double- and triple-combination therapies were compared to identify the most efficacious treatment using static time-kill studies (24 h, six isolates), an in vitro pharmacokinetic/pharmacodynamic model (IVM; 48 h, two isolates), and the mouse thigh infection model (24 h, six isolates). In static time-kill studies, all monotherapies (polymyxin B, rifampin, amikacin, meropenem, or minocycline) were ineffective. Initial bacterial killing was enhanced with various polymyxin B-containing double combinations; however, substantial regrowth occurred in most cases by 24 h. Most polymyxin B-containing triple combinations provided greater and more sustained killing than double combinations. Standard dosage regimens of polymyxin B (2.5 mg/kg of body weight/day), rifampin (600 mg every 12 h), and amikacin (7.5 mg/kg every 12 h) were simulated in the IVM. Against isolate ATH 16, no viable bacteria were detected across 5 to 25 h with triple therapy, with regrowth to ∼2-log10 CFU/ml occurring at 48 h. Against isolate BD 32, rapid initial killing of ∼3.5-log10 CFU/ml at 5 h was followed by a slow decline to ∼2-log10 CFU/ml at 48 h. In infected mice, polymyxin B monotherapy (60 mg/kg/day) generally was ineffective. With triple therapy (polymyxin B at 60 mg/kg/day, rifampin at 120 mg/kg/day, and amikacin at 300 mg/kg/day), at 24 h there was an ∼1.7-log10 CFU/thigh reduction compared to the starting inoculum for all six isolates. Our results demonstrate that the polymyxin B-rifampin-amikacin combination significantly enhanced in vitro and in vivo bacterial killing, providing important information for the optimization of polymyxin-based combinations in patients.
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Affiliation(s)
- Su Mon Aye
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Irene Galani
- Fourth Department of Internal Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Heidi Yu
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Jiping Wang
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Ke Chen
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Hasini Wickremasinghe
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Ilias Karaiskos
- First Department of Internal Medicine-Infectious Diseases, Hygeia General Hospital, Athens, Greece
| | - Phillip J Bergen
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Jinxin Zhao
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Tony Velkov
- Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Helen Giamarellou
- First Department of Internal Medicine-Infectious Diseases, Hygeia General Hospital, Athens, Greece
| | - Yu-Wei Lin
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Brian T Tsuji
- Laboratory for Antimicrobial Pharmacodynamics, NYS Centre of Excellence in Bioinformatics & Life Sciences, Buffalo, New York, USA
| | - Jian Li
- Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, Australia
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Garber B, Glauser J. Recent Developments in Infectious Disease Chemotherapy: Review for Emergency Department Practitioners 2020. CURRENT EMERGENCY AND HOSPITAL MEDICINE REPORTS 2020; 8:116-121. [PMID: 32837804 PMCID: PMC7296288 DOI: 10.1007/s40138-020-00218-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Purpose of Review We discuss and review new antimicrobials for treatment of bacterial, viral, fungal, and parasitic infections with indications, contraindications, and side effects for each. We will also review new information and indications on older agents that are relevant to clinical practice. Many of them may be unfamiliar to Emergency Physicians given their newness and at times hospital restrictions on their use. We also review some new promising agents that are not yet in the clinical pipeline. Recent Findings As new antibiotics become available for clinicians to use, new information becomes available with respect to the drugs' indications, efficacy, pathogen resistance, drug-drug interactions, and side effects. Summary This article provides Emergency Department clinicians with a useful summary with new information on antibiotic use and recent research into agents which may become available.
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Affiliation(s)
- Boris Garber
- MetroHealth Medical Center, Case Western Reserve School of Medicine, Cleveland, OH USA
| | - Jonathan Glauser
- MetroHealth Medical Center, Case Western Reserve School of Medicine, Cleveland, OH USA
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Yuan Y, Xu QM, Yu SC, Sun HZ, Cheng JS, Yuan YJ. Control of the polymyxin analog ratio by domain swapping in the nonribosomal peptide synthetase of Paenibacillus polymyxa. J Ind Microbiol Biotechnol 2020; 47:551-562. [PMID: 32495197 DOI: 10.1007/s10295-020-02275-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 04/15/2020] [Indexed: 11/26/2022]
Abstract
Polymyxins are used as the last-line therapy against multidrug-resistant bacteria. However, their further clinical development needs to solve problems related to the presence of heterogeneous analogs, but there is still no platform or methods that can regulate the biosynthesis of polymyxin analogs. In this study, we present an approach to swap domains in the polymyxin gene cluster to regulate the production of different analogs. Following adenylation domain swapping, the proportion of polymyxin B1 increased from 41.36 to 52.90%, while that of B1-1 decreased from 18.25 to 3.09%. The ratio of polymyxin B1 and B3 following starter condensation domain swapping changed from 41.36 and 16.99 to 55.03 and 6.39%, respectively. The two domain-swapping strains produced 62.96% of polymyxin B1, 6.70% of B3 and 3.32% of B1-1. This study also revealed the presence of overflow fluxes between acetoin, 2,3-butanediol and polymyxin. To our best knowledge, this is the first report of engineering the polymyxin synthetase gene cluster in situ to regulate the relative proportions of polymyxin analogs. This research paves a way for regulating lipopeptide analogs and will facilitate the development of novel lipopeptide derivatives.
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Affiliation(s)
- Ye Yuan
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China
| | - Qiu-Man Xu
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Binshuixi Road 393, Xiqing District, Tianjin, 300387, People's Republic of China.
| | - Si-Cen Yu
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China
| | - Hui-Zhong Sun
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China
| | - Jing-Sheng Cheng
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China.
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China.
| | - Ying-Jin Yuan
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Jinnan District, Tianjin, 300350, People's Republic of China
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Elnaggar YS, Elwakil BH, Elshewemi SS, El-Naggar MY, Bekhit AA, Olama ZA. Novel Siwa propolis and colistin-integrated chitosan nanoparticles: elaboration; in vitro and in vivo appraisal. Nanomedicine (Lond) 2020; 15:1269-1284. [PMID: 32410497 DOI: 10.2217/nnm-2019-0467] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Aim: The present study aimed to formulate novel cremophore-decorated chitosan nanoparticles of colistin, integrated with Siwa propolis extract, to solve bacterial resistance to colistin. Materials & methods: The novel nanoformula was prepared using an incorporation method. Physicochemical assessment and in vivo studies of the selected nanoformulations were performed. Results: The nanoformulation exhibited a nanosize of 48.3 nm, high ζ potential (43.6 mV), high entrapment efficiency (75%) and complete bacterial growth eradication within 2 h (minimum inhibitory concentration = 6.25 μg/ml). Histological examination showed that incorporation of colistin into the nanoformulation could successfully prevent its nephrotoxicity. Conclusion: Tailoring of proper nanocarrier could successfully revert bacteria from being colistin-resistant to colistin-sensitive. The developed nanoformulation can be considered as a potential antibacterial agent in pneumonia treatment.
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Affiliation(s)
- Yosra Sr Elnaggar
- Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
- Head of International-publication & Nanotechnology Consultation Center (INCC), Faculty of Pharmacy & Drug Manufacturing, Pharos University in Alexandria, Alexandria, Egypt
| | - Bassma H Elwakil
- Faculty of Allied Medical Science, Pharos University in Alexandria, Alexandria, Egypt
| | | | | | - Adnan A Bekhit
- Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
- Pharmacy Program, Allied Health Department, College of Health & Sport sciences, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain
| | - Zakia A Olama
- Faculty of Science, Alexandria University, Alexandria, Egypt
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