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Shariati A, Noei M, Chegini Z. Bacteriophages: The promising therapeutic approach for enhancing ciprofloxacin efficacy against bacterial infection. J Clin Lab Anal 2023:e24932. [PMID: 37377167 PMCID: PMC10388223 DOI: 10.1002/jcla.24932] [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: 02/08/2023] [Revised: 04/14/2023] [Accepted: 06/11/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND The emergence of ciprofloxacin-resistant bacteria is a serious challenge worldwide, bringing the need to find new approaches to manage this bacterium. Bacteriophages (phages) have been shown inhibitory effects against ciprofloxacin-resistance bacteria; thus, ciprofloxacin resistance or tolerance may not affect the phage's infection ability. Additionally, researchers used phage-ciprofloxacin combination therapy for the inhibition of multidrug-resistant bacteria. RESULTS The sublethal concentrations of ciprofloxacin could lead to an increase in progeny production. Antibiotic treatments could enhance the release of progeny phages by shortening the lytic cycle and latent period. Thus, sublethal concentrations of antibiotics combined with phages can be used for the management of bacterial infections with high antibiotic resistance. In addition, combination therapy exerts various selection pressures that can mutually decrease phage and antibiotic resistance. Moreover, phage ciprofloxacin could significantly reduce bacterial counts in the biofilm community. Immediate usage of phages after the attachment of bacteria to the surface of the flow cells, before the development of micro-colonies, could lead to the best effect of phage therapy against bacterial biofilm. Noteworthy, phage should be used before antibiotics usage because this condition may have allowed phage replication to occur first before ciprofloxacin interrupted the bacterial DNA replication process, thereby interfering with the activity of the phages. Furthermore, the phage-ciprofloxacin combination showed a promising result for the management of Pseudomonas aeruginosa infections in mouse models. Nevertheless, low data are existing about the interaction between phages and ciprofloxacin in combination therapies, especially regarding the emergence of phage-resistant mutants. Additionally, there is a challenging and important question of how the combined ciprofloxacin with phages can increase antibacterial functions. Therefore, more examinations are required to support the clinical usage of phage-ciprofloxacin combination therapy.
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Affiliation(s)
- Aref Shariati
- Molecular and Medicine Research Centre, Khomein University of Medical Sciences, Khomein, Iran
| | - Milad Noei
- Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Zahra Chegini
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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2
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Identification and complete genome of lytic "Kp34likevirus" phage vB_KpnP_Bp5 and therapeutic potency in the treatment of lethal Klebsiella pneumoniae infections in mice. Virus Res 2021; 297:198348. [PMID: 33631221 DOI: 10.1016/j.virusres.2021.198348] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 02/14/2021] [Accepted: 02/16/2021] [Indexed: 12/16/2022]
Abstract
Klebsiella pneumoniae (K. pneumoniae) infection exist widely in the farming and medical. The treatment of K. pneumoniae infection is primarily based on antibiotics, which not only leads to a large economic burden but also the development of antibiotic resistance. Bacteriophages therapy present a promising alternative. The object of this study was identifying comprehensively a lytic lethal K. pneumoniae phage vB_KpnP_Bp5, and evaluating the phage as an anti-infective agent in an experimental K. pneumoniae infection murine model. The phage Bp5 had the following characteristics: the optimal number of infections was 0.001, the latent period was 5 min, the outbreak period was 40 min, the burst size was 24 plaque-forming unit (PFU)/cell, the phage could withstand 50 °C temperature and the optimal pH value was 4.0-10.0. According to electron microscopy and whole-genome sequence analysis, the phage should be classified as a member of order Caudovirales, family Podoviridae, subfamily Autographiviridae. Meantime, phylogenetic analysis showed high conservation of gene arrangement and gene content. We demonstrated that administration of phage Bp5 significantly reduced colony formation by K. pneumoniae and alleviated damage to lung tissue. In addition, different therapy time point was closely related to body health and the degree of tissue damage. Once treated promptly, it will greatly reduce mortality and alveolar inflammatory exudation and injury.
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3
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Sumrall ET, Keller AP, Shen Y, Loessner MJ. Structure and function of Listeria teichoic acids and their implications. Mol Microbiol 2020; 113:627-637. [PMID: 31972870 DOI: 10.1111/mmi.14472] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 01/10/2020] [Accepted: 01/17/2020] [Indexed: 01/13/2023]
Abstract
Teichoic acids (TAs) are the most abundant glycopolymers in the cell wall of Listeria, an opportunistic Gram-positive pathogen that causes severe foodborne infections. Two different structural classes of Listeria TA exist: the polyribitolphosphate-based wall teichoic acid (WTA) that is covalently anchored to the peptidoglycan, and the polyglycerolphosphate-based lipoteichoic acid (LTA) that is tethered to the cytoplasmic membrane. While TA polymers govern many important physiological processes, the diverse glycosylation patterns of WTA result in a high degree of surface variation across the species and serovars of Listeria, which in turn bestows varying effects on fitness, biofilm formation, bacteriophage susceptibility and virulence. We review the advances made over the past two decades, and our current understanding of the relationship between TA structure and function. We describe the various types of TA that have been structurally determined to date, and discuss the genetic determinants known to be involved in TA glycosylation. We elaborate on surface proteins functionally related to TA decoration, as well as the molecular and analytical tools used to probe TAs. We anticipate that the growing knowledge of the Listeria surface chemistry will also be exploited to develop novel diagnostic and therapeutic strategies for this pathogen.
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Affiliation(s)
- Eric T Sumrall
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Anja P Keller
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Yang Shen
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Martin J Loessner
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
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4
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Ma Y, Wang C, Li Y, Li J, Wan Q, Chen J, Tay FR, Niu L. Considerations and Caveats in Combating ESKAPE Pathogens against Nosocomial Infections. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1901872. [PMID: 31921562 PMCID: PMC6947519 DOI: 10.1002/advs.201901872] [Citation(s) in RCA: 139] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 10/04/2019] [Indexed: 05/19/2023]
Abstract
ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) are among the most common opportunistic pathogens in nosocomial infections. ESKAPE pathogens distinguish themselves from normal ones by developing a high level of antibiotic resistance that involves multiple mechanisms. Contemporary therapeutic strategies which are potential options in combating ESKAPE bacteria need further investigation. Herein, a broad overview of the antimicrobial research on ESKAPE pathogens over the past five years is provided with prospective clinical applications.
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Affiliation(s)
- Yu‐Xuan Ma
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
| | - Chen‐Yu Wang
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
| | - Yuan‐Yuan Li
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
| | - Jing Li
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
| | - Qian‐Qian Wan
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
| | - Ji‐Hua Chen
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
| | - Franklin R. Tay
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
- The Graduate SchoolAugusta University1430, John Wesley Gilbert DriveAugustaGA30912‐1129USA
| | - Li‐Na Niu
- State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of ProsthodonticsSchool of StomatologyThe Fourth Military Medical University145 Changle West RoadXi'anShaanxi710032P. R. China
- The Graduate SchoolAugusta University1430, John Wesley Gilbert DriveAugustaGA30912‐1129USA
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5
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Edgar RH, Cook J, Noel C, Minard A, Sajewski A, Fitzpatrick M, Fernandez R, Hempel JD, Kellum JA, Viator JA. Bacteriophage-mediated identification of bacteria using photoacoustic flow cytometry. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-7. [PMID: 31758676 PMCID: PMC6874036 DOI: 10.1117/1.jbo.24.11.115003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 11/04/2019] [Indexed: 05/26/2023]
Abstract
Infection with resistant bacteria has become an ever increasing problem in modern medical practice. Currently, broad spectrum antibiotics are prescribed until bacteria can be identified through blood cultures, a process that can take two to three days and is unable to provide quantitative information. To detect and quantify bacteria rapidly in blood samples, we designed a method using labeled bacteriophage in conjunction with photoacoustic flow cytometry (PAFC). PAFC is the generation of ultrasonic waves created by the absorption of laser light in particles under flow. Bacteriophage is a virus that infects bacteria and possesses the ability to discriminate bacterial surface antigens, allowing the bacteriophage to bind only to their target bacteria. Bacteria can be tagged with dyed phage and processed through a photoacoustic flow cytometer where they are detected by the acoustic response. We demonstrate that E. coli; can be detected and discriminated from Salmonella; using this method. Our goal is to develop a method to determine bacterial content in blood samples. We hope to develop this technology into future clinical use and decrease the time required to identify bacterial species from 3 to 4 days to less than 1 hour.
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Affiliation(s)
- Robert H. Edgar
- University of Pittsburgh, Swanson School of Engineering, Department of Bioengineering, Pittsburgh, Pennsylvania, United States
| | - Justin Cook
- Duquesne University, Pittsburgh, Pennsylvania, United States
| | - Cierra Noel
- Duquesne University, Pittsburgh, Pennsylvania, United States
| | - Austin Minard
- Duquesne University, Pittsburgh, Pennsylvania, United States
| | - Andrea Sajewski
- Duquesne University, Pittsburgh, Pennsylvania, United States
| | | | | | - John D. Hempel
- Duquesne University, Pittsburgh, Pennsylvania, United States
| | - John A. Kellum
- University of Pittsburgh, Center for Critical Care Nephrology, Department of Critical Care Medicine, Pittsburgh, Pennsylvania, United States
| | - John A. Viator
- University of Pittsburgh, Swanson School of Engineering, Department of Bioengineering, Pittsburgh, Pennsylvania, United States
- Duquesne University, Pittsburgh, Pennsylvania, United States
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6
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Sumrall ET, Shen Y, Keller AP, Rismondo J, Pavlou M, Eugster MR, Boulos S, Disson O, Thouvenot P, Kilcher S, Wollscheid B, Cabanes D, Lecuit M, Gründling A, Loessner MJ. Phage resistance at the cost of virulence: Listeria monocytogenes serovar 4b requires galactosylated teichoic acids for InlB-mediated invasion. PLoS Pathog 2019; 15:e1008032. [PMID: 31589660 PMCID: PMC6779246 DOI: 10.1371/journal.ppat.1008032] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 08/15/2019] [Indexed: 01/13/2023] Open
Abstract
The intracellular pathogen Listeria monocytogenes is distinguished by its ability to invade and replicate within mammalian cells. Remarkably, of the 15 serovars within the genus, strains belonging to serovar 4b cause the majority of listeriosis clinical cases and outbreaks. The Listeria O-antigens are defined by subtle structural differences amongst the peptidoglycan-associated wall-teichoic acids (WTAs), and their specific glycosylation patterns. Here, we outline the genetic determinants required for WTA decoration in serovar 4b L. monocytogenes, and demonstrate the exact nature of the 4b-specific antigen. We show that challenge by bacteriophages selects for surviving clones that feature mutations in genes involved in teichoic acid glycosylation, leading to a loss of galactose from both wall teichoic acid and lipoteichoic acid molecules, and a switch from serovar 4b to 4d. Surprisingly, loss of this galactose decoration not only prevents phage adsorption, but leads to a complete loss of surface-associated Internalin B (InlB),the inability to form actin tails, and a virulence attenuation in vivo. We show that InlB specifically recognizes and attaches to galactosylated teichoic acid polymers, and is secreted upon loss of this modification, leading to a drastically reduced cellular invasiveness. Consequently, these phage-insensitive bacteria are unable to interact with cMet and gC1q-R host cell receptors, which normally trigger cellular uptake upon interaction with InlB. Collectively, we provide detailed mechanistic insight into the dual role of a surface antigen crucial for both phage adsorption and cellular invasiveness, demonstrating a trade-off between phage resistance and virulence in this opportunistic pathogen. L. monocytogenes is a Gram-positive, food-borne, intracellular pathogen that causes severe infection in susceptible individuals. Interestingly, almost all infections are caused by a subset of strains belonging to certain serovars featuring a complex glycosylation pattern on their cell surface. Using an engineered bacteriophage that specifically recognizes these modifications we selected for mutants that lost these sugars. We found that the resulting strains are severely deficient in invading host cells as we observed that a major virulence factor mediating host cell entry requires galactose decoration of the cell surface for its function. Without this galactose decoration, the strain represents a serovar not associated with disease. Altogether, we show a complex interplay between bacteriophages, bacteria, and the host, demonstrating that cellular invasiveness is dependent upon a serovar-defining structure, which also serves as a phage receptor.
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Affiliation(s)
- Eric T. Sumrall
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Yang Shen
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
- * E-mail: (YS); (MJL)
| | - Anja P. Keller
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Jeanine Rismondo
- Section of Microbiology and MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, United Kingdom
| | - Maria Pavlou
- Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland
| | - Marcel R. Eugster
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Samy Boulos
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Olivier Disson
- Biology of Infection Unit, Institut Pasteur, Paris, France
- Inserm U1117, Paris, France
| | - Pierre Thouvenot
- Biology of Infection Unit, Institut Pasteur, Paris, France
- Inserm U1117, Paris, France
| | - Samuel Kilcher
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Bernd Wollscheid
- Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland
| | - Didier Cabanes
- i3S - Instituto de Investigação e Inovação em Saúde; Institute for Molecular and Cell Biology, University of Porto, Porto, Portugal
| | - Marc Lecuit
- Biology of Infection Unit, Institut Pasteur, Paris, France
- Inserm U1117, Paris, France
- Paris Descartes University, Department of Infectious Diseases and Tropical Medicine, Necker-Enfants Malades University Hospital, APHP, Institut Imagine, Paris, France
| | - Angelika Gründling
- Section of Microbiology and MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, United Kingdom
| | - Martin J. Loessner
- Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
- * E-mail: (YS); (MJL)
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7
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Yang Z, Liu X, Shi Y, Yin S, Shen W, Chen J, Chen Y, Chen Y, You B, Gong Y, Luo X, Zhang C, Yuan Z, Peng Y. Characterization and genome annotation of a newly detected bacteriophage infecting multidrug-resistant Acinetobacter baumannii. Arch Virol 2019; 164:1527-1533. [PMID: 30900072 PMCID: PMC6526140 DOI: 10.1007/s00705-019-04213-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/20/2019] [Indexed: 12/03/2022]
Abstract
A novel virulent bacteriophage, φAbp2, infecting multidrug-resistant (MDR) Acinetobacter baumannii was isolated from the wastewater of a sewage management centre at Southwest Hospital, China. Transmission electron microscopy and phylogenetic analysis revealed that φAbp2 belongs to the subfamily Peduovirinae. A one-step growth curve demonstrated that φAbp2 had a latent period of 15 min, a lysis period of 35 min, and a burst size of 222 particles per infected host cell. Moreover, φAbp2 showed a relatively broad host range in local A. baumannii, and it also exhibited tolerance over a wider range of thermal and pH conditions. Genomic sequencing revealed that φAbp2 has a circular double-stranded DNA genome with no sequence similarity to our previously isolated φAbp1. Eighty-eight putative open reading frames (ORFs) encoding 41 proteins of known function and 47 of unknown function were identified, and the G/C content was 37.84%. φAbp2 is a new member of the subfamily Peduovirinae of the family Myoviridae. Its genome sequence is very similar to that of the A. baumannii phage LZ35.
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Affiliation(s)
- Zichen Yang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
- Department of microbiology, College of Basic Medicin, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xinzhu Liu
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Yunlong Shi
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Supeng Yin
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
- Department of microbiology, College of Basic Medicin, Third Military Medical University (Army Medical University), Chongqing, China
| | - Wei Shen
- Department of microbiology, College of Basic Medicin, Third Military Medical University (Army Medical University), Chongqing, China
| | - Jing Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Yu Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Yajie Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Bo You
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Yali Gong
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Xiaoqiang Luo
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Cheng Zhang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Zhiqiang Yuan
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China
| | - Yizhi Peng
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Chongqing, China.
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8
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Investigation of O-polysaccharides from bacterial strains of Pseudomonas genus as potential receptors of bacteriophage BIM BV-45. Int J Biol Macromol 2018; 118:1065-1072. [DOI: 10.1016/j.ijbiomac.2018.06.165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 06/08/2018] [Accepted: 06/27/2018] [Indexed: 02/06/2023]
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9
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Hill C, Mills S, Ross RP. Phages & antibiotic resistance: are the most abundant entities on earth ready for a comeback? Future Microbiol 2018; 13:711-726. [PMID: 29792526 DOI: 10.2217/fmb-2017-0261] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Bacteriophages, which lost out to antibiotic therapy in the past, may be poised to make a comeback. Once discarded because of their narrow activity spectrum, it can now be viewed as a major advantage that these intracellular, self-replicating entities can exert their killing effect with minimal damage to the commensal microbiome. In eastern Europe, phages continue to be used both prophylactically and therapeutically to treat infections. More recently, much needed regulated clinical trials are underway with a view to restoring phage therapy as a tool for mainstream medicine, although current regulations may impede their full potential. One hundred years after their discovery, and amid an antibiotic resistance crisis, we must ask, what can be done to harness their full antibacterial potential?
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Affiliation(s)
- Colin Hill
- APC Microbiome Ireland & School of Microbiology, University College Cork, Cork, Ireland
| | - Susan Mills
- APC Microbiome Ireland & School of Microbiology, University College Cork, Cork, Ireland
| | - Reynolds P Ross
- APC Microbiome Ireland & School of Microbiology, University College Cork, Cork, Ireland
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10
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Mulugeta B, Tesfaye S, Tesfaye W. Bacteriophages and phage products: Applications in medicine and biotechnological industries, and
general concerns. ACTA ACUST UNITED AC 2018. [DOI: 10.5897/sre2017.6546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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11
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Zhang G, Zhao Y, Paramasivan S, Richter K, Morales S, Wormald PJ, Vreugde S. Bacteriophage effectively kills multidrug resistantStaphylococcus aureusclinical isolates from chronic rhinosinusitis patients. Int Forum Allergy Rhinol 2017; 8:406-414. [DOI: 10.1002/alr.22046] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 10/25/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Guimin Zhang
- Department of Otolaryngology-Head & Neck Surgery; Adelaide University; Adelaide SA Australia
- Department of Otolaryngology-Head and Neck Surgery; Tianjin First Center Hospital; Tianjin China
| | - Yin Zhao
- Department of Otolaryngology-Head & Neck Surgery; Adelaide University; Adelaide SA Australia
- Department of Otolaryngology; Head and Neck Surgery; The Second Hospital of Jilin University; Changchun China
| | - Sathish Paramasivan
- Department of Otolaryngology-Head & Neck Surgery; Adelaide University; Adelaide SA Australia
| | - Katharina Richter
- Department of Otolaryngology-Head & Neck Surgery; Adelaide University; Adelaide SA Australia
| | | | - Peter-John Wormald
- Department of Otolaryngology-Head & Neck Surgery; Adelaide University; Adelaide SA Australia
| | - Sarah Vreugde
- Department of Otolaryngology-Head & Neck Surgery; Adelaide University; Adelaide SA Australia
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12
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Pediocin-like bacteriocins: new perspectives on mechanism of action and immunity. Curr Genet 2017; 64:345-351. [PMID: 28983718 DOI: 10.1007/s00294-017-0757-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 09/20/2017] [Accepted: 09/22/2017] [Indexed: 01/26/2023]
Abstract
This review attempts to analyze the mechanism of action and immunity of class IIa bacteriocins. These peptides are promising alternative food preservatives and they have a great potential application in medical sciences. Class IIa bacteriocins act on the cytoplasmic membrane of Gram-positive cells dissipating the transmembrane electrical potential by forming pores. However, their toxicity and immunity mechanism remains elusive. Here we discuss the role of the mannose phosphotransferase system (man-PTS) as the receptor for class IIa bacteriocins and the influence of the membrane composition on the activity of these antimicrobial peptides. A model that is consistent with experimental results obtained by different researchers involves the non-specific binding of the bacteriocin to the negatively charged membrane of target bacteria. This step would facilitate a specific binding to the receptor protein, altering its functionality and forming an independent pore in which the bacteriocin is inserted in the membrane. An immunity protein could specifically recognize and block the pore. Bacteriocins function in bacterial ecosystems and energetic costs associated with their production are also discussed. Theoretical models based on solid experimental evidence are vital to understand bacteriocins mechanism of action and to promote new technological developments.
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13
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φBO1E, a newly discovered lytic bacteriophage targeting carbapenemase-producing Klebsiella pneumoniae of the pandemic Clonal Group 258 clade II lineage. Sci Rep 2017; 7:2614. [PMID: 28572684 PMCID: PMC5453958 DOI: 10.1038/s41598-017-02788-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 04/13/2017] [Indexed: 01/15/2023] Open
Abstract
The pandemic dissemination of KPC carbapenemase-producing Klebsiella pneumoniae (KPC-KP) represents a major public health problem, given their extensive multidrug resistance profiles and primary role in causing healthcare-associated infections. This phenomenon has largely been contributed by strains of Clonal Group (CG) 258, mostly of clade II, which in some areas represent the majority of KPC-KP isolates. Here we have characterized a newly discovered lytic Podoviridae, named φBO1E, targeting KPC-KP strains of clade II lineage of CG258. Genomic sequencing revealed that φBO1E belongs to the Kp34virus genus (87% nucleotide identity to vB_KpnP_SU552A). ΦBO1E was stable over a broad pH and temperature range, exhibited strict specificity for K. pneumoniae strains of clade II of CG258, and was unable to establish lysogeny. In a Galleria mellonella infection model, φBO1E was able to protect larvae from death following infection with KPC-KP strains of clade II of CG258, including one colistin resistant strain characterized by a hypermucoviscous phenotype. To our best knowledge φBO1E is the first characterized lytic phage targeting K. pneumoniae strains of this pandemic clonal lineage. As such, it could be of potential interest to develop new agents for treatment of KPC-KP infections and for decolonization of subjects chronically colonized by these resistant superbugs.
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14
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Cansizoglu MF, Toprak E. Fighting against evolution of antibiotic resistance by utilizing evolvable antimicrobial drugs. Curr Genet 2017; 63:973-976. [PMID: 28497241 DOI: 10.1007/s00294-017-0703-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/03/2017] [Accepted: 05/05/2017] [Indexed: 12/24/2022]
Abstract
Antibiotic resistance is a worldwide public health problem (Bush et al. in Nat Rev Microbiol 9:894-896, 2011). The lack of effective therapies against resistant bacteria globally leads to prolonged treatments, increased mortality, and inflating health care costs (Oz et al. in Mol Biol Evol 31:2387-2401, 2014; Martinez in Science 321:365-367, 2008; Lipsitch et al. in Proc Natl Acad Sci USA 97:1938-1943, 2000; Taubes in Science 321:356-361, 2008; Laxminarayan et al. in Lancet, 2016; Laxminarayan et al. in Lancet Infect Dis 13:1057-1098, 2013). Current efforts towards a solution of this problem can be boiled down to two main strategies: (1) developing of new antimicrobial agents and (2) searching for smart strategies that can restore or preserve the efficacy of existing antimicrobial agents. In this short review article, we discuss the need for evolvable antimicrobial agents, focusing on a new antimicrobial technology that utilizes peptide-conjugated phosphorodiamidate morpholino oligomers to inhibit the growth of pathogenic bacteria by targeting bacterial genes.
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Affiliation(s)
- Mehmet Fatih Cansizoglu
- Green Center for Systems Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Erdal Toprak
- Green Center for Systems Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA. .,Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
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