1
|
Suleman M, Yaseen AR, Ahmed S, Khan Z, Irshad A, Pervaiz A, Rahman HH, Azhar M. Pyocins and Beyond: Exploring the World of Bacteriocins in Pseudomonas aeruginosa. Probiotics Antimicrob Proteins 2024:10.1007/s12602-024-10322-3. [PMID: 39023701 DOI: 10.1007/s12602-024-10322-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2024] [Indexed: 07/20/2024]
Abstract
Pseudomonas aeruginosa significantly induces health-associated infections in a variety of species other than humans. Over the years, the opportunistic pathogen has developed resistance against commonly used antibiotics. Since most P. aeruginosa strains are multi-drug resistant, regular antibiotic treatment of its infections is becoming a dire concern, shifting the global focus towards the development of alternate antimicrobial approaches. Pyocins are one of the most diverse antimicrobial peptide combinations produced by bacteria. They have potent antimicrobial properties, mainly against bacteria from the same phylogenetic group. P. aeruginosa, whether from clinical or environmental origins, produce several different pyocins that show inhibitory activity against other multi-drug-resistant strains of P. aeruginosa. They are, therefore, good candidates for alternate therapeutic antimicrobials because they have a unique mode of action that kills antibiotic-resistant bacteria by attacking their biofilms. Here, we review pseudomonas-derived antimicrobial pyocins with great therapeutic potential against multi-drug-resistant P. aeruginosa.
Collapse
Affiliation(s)
- Muhammad Suleman
- School of Biological Sciences, Faculty of Life Sciences, University of the Punjab, Lahore, 54590, Pakistan.
| | - Allah Rakha Yaseen
- School of Biological Sciences, Faculty of Life Sciences, University of the Punjab, Lahore, 54590, Pakistan
| | - Shahbaz Ahmed
- School of Biological Sciences, Faculty of Life Sciences, University of the Punjab, Lahore, 54590, Pakistan
| | - Zoha Khan
- School of Biochemistry and Biotechnology, University of the Punjab, Lahore, 54590, Pakistan
| | - Asma Irshad
- School of Biochemistry and Biotechnology, University of the Punjab, Lahore, 54590, Pakistan
| | - Afsah Pervaiz
- Institute of Microbiology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Hafiza Hiba Rahman
- Department of Pathology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muteeba Azhar
- School of Biochemistry and Biotechnology, University of the Punjab, Lahore, 54590, Pakistan
| |
Collapse
|
2
|
Turner RJ. The good, the bad, and the ugly of metals as antimicrobials. Biometals 2024; 37:545-559. [PMID: 38112899 PMCID: PMC11101337 DOI: 10.1007/s10534-023-00565-y] [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: 09/03/2023] [Accepted: 11/18/2023] [Indexed: 12/21/2023]
Abstract
We are now moving into the antimicrobial resistance (AMR) era where more antibiotic resistant bacteria are now the majority, a problem brought on by both misuse and over use of antibiotics. Unfortunately, the antibiotic development pipeline dwindled away over the past decades as they are not very profitable compounds for companies to develop. Regardless researchers over the past decade have made strides to explore alternative options and out of this we see revisiting historical infection control agents such as toxic metals. From this we now see a field of research exploring the efficacy of metal ions and metal complexes as antimicrobials. Such antimicrobials are delivered in a variety of forms from metal salts, alloys, metal complexes, organometallic compounds, and metal based nanomaterials and gives us the broad term metalloantimicrobials. We now see many effective formulations applied for various applications using metals as antimicrobials that are effective against drug resistant strains. The purpose of the document here is to step aside and begin a conversation on the issues of use of such toxic metal compounds against microbes. This critical opinion mini-review in no way aims to be comprehensive. The goal here is to understand the benefits of metalloantimicrobials, but also to consider strongly the disadvantages of using metals, and what are the potential consequences of misuse and overuse. We need to be conscious of the issues, to see the entire system and affect through a OneHealth vision.
Collapse
Affiliation(s)
- Raymond J Turner
- Department of Biological Sciences, University of Calgary, 2500 University Dr. NW, Calgary, AB, Canada.
| |
Collapse
|
3
|
Paul S, Verma S, Chen YC. Peptide Dendrimer-Based Antibacterial Agents: Synthesis and Applications. ACS Infect Dis 2024; 10:1034-1055. [PMID: 38428037 PMCID: PMC11019562 DOI: 10.1021/acsinfecdis.3c00624] [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: 11/16/2023] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 03/03/2024]
Abstract
Pathogenic bacteria cause the deaths of millions of people every year. With the development of antibiotics, hundreds and thousands of people's lives have been saved. Nevertheless, bacteria can develop resistance to antibiotics, rendering them insensitive to antibiotics over time. Peptides containing specific amino acids can be used as antibacterial agents; however, they can be easily degraded by proteases in vivo. To address these issues, branched peptide dendrimers are now being considered as good antibacterial agents due to their high efficacy, resistance to protease degradation, and low cytotoxicity. The ease with which peptide dendrimers can be synthesized and modified makes them accessible for use in various biological and nonbiological fields. That is, peptide dendrimers hold a promising future as antibacterial agents with prolonged efficacy without bacterial resistance development. Their in vivo stability and multivalence allow them to effectively target multi-drug-resistant strains and prevent biofilm formation. Thus, it is interesting to have an overview of the development and applications of peptide dendrimers in antibacterial research, including the possibility of employing machine learning approaches for the design of AMPs and dendrimers. This review summarizes the synthesis and applications of peptide dendrimers as antibacterial agents. The challenges and perspectives of using peptide dendrimers as the antibacterial agents are also discussed.
Collapse
Affiliation(s)
- Suchita Paul
- Institute
of Semiconductor Technology, National Yang
Ming Chiao Tung University, Hsinchu 300, Taiwan
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Sandeep Verma
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, Uttar Pradesh, India
- Gangwal
School of Medical Sciences and Technology, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Yu-Chie Chen
- Institute
of Semiconductor Technology, National Yang
Ming Chiao Tung University, Hsinchu 300, Taiwan
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, Hsinchu 300, Taiwan
| |
Collapse
|
4
|
Kamal I, Ashfaq UA, Hayat S, Aslam B, Sarfraz MH, Yaseen H, Rajoka MSR, Shah AA, Khurshid M. Prospects of antimicrobial peptides as an alternative to chemical preservatives for food safety. Biotechnol Lett 2023; 45:137-162. [PMID: 36504266 DOI: 10.1007/s10529-022-03328-w] [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: 04/05/2022] [Revised: 11/10/2022] [Accepted: 11/17/2022] [Indexed: 12/14/2022]
Abstract
Antimicrobial peptides (AMPs) are a potential alternative to antimicrobial agents that have got considerable research interest owing to their significant role in the inhibition of bacterial pathogens. These AMPs can essentially inhibit the growth and multiplication of microbes through multiple mechanisms including disruption of cellular membranes, inhibition of cell wall biosynthesis, or affecting intracellular components and cell division. Moreover, AMPs are biocompatible and biodegradable therefore, they can be a good alternative to antimicrobial agents and chemical preservatives. A few of their features for example thermostability and high selectivity are quite appealing for their potential use in the food industry for food preservation to prevent the spoilage caused by microorganisms and foodborne pathogens. Despite these advantages, very few AMPs are being used at an industrial scale for food preservation as these peptides are quite vulnerable to external environmental factors which deter their practical applications and commercialization. The review aims to provide an outline of the mechanism of action of AMPs and their prospects as an alternative to chemical preservatives in the food industry. Further studies related to the structure-activity relationship of AMPs will help to expand the understanding of their mechanism of action and to determine specific conditions to increase their stability and applicability in food preservation.
Collapse
Affiliation(s)
- Iqra Kamal
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Sumreen Hayat
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Bilal Aslam
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | | | - Hamna Yaseen
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Muhammad Shahid Riaz Rajoka
- Laboratory of Animal Food Function, Graduate School of Agricultural Science, Tohoku University, Sendai, 980-8572, Japan
| | - Asad Ali Shah
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan.
| | - Mohsin Khurshid
- Department of Microbiology, Government College University, Faisalabad, Pakistan.
| |
Collapse
|
5
|
Hassan M, Flanagan TW, Kharouf N, Bertsch C, Mancino D, Haikel Y. Antimicrobial Proteins: Structure, Molecular Action, and Therapeutic Potential. Pharmaceutics 2022; 15:pharmaceutics15010072. [PMID: 36678702 PMCID: PMC9864823 DOI: 10.3390/pharmaceutics15010072] [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: 10/19/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 12/28/2022] Open
Abstract
Second- and third-line treatments of patients with antibiotic-resistant infections can have serious side effects, such as organ failure with prolonged care and recovery. As clinical practices such as cancer therapies, chronic disease treatment, and organ transplantation rely on the ability of available antibiotics to fight infection, the increased resistance of microbial pathogens presents a multifaceted, serious public health concern worldwide. The pipeline of traditional antibiotics is exhausted and unable to overcome the continuously developing multi-drug resistance. To that end, the widely observed limitation of clinically utilized antibiotics has prompted researchers to find a clinically relevant alternate antimicrobial strategy. In recent decades, the discovery of antimicrobial peptides (AMPs) as an excellent candidate to overcome antibiotic resistance has received further attention, particularly from scientists, health professionals, and the pharmaceutical industry. Effective AMPs are characterized by a broad spectrum of antimicrobial activities, high pathogen specificity, and low toxicity. In addition to their antimicrobial activity, AMPs have been found to be involved in a variety of biological functions, including immune regulation, angiogenesis, wound healing, and antitumor activity. This review provides a current overview of the structure, molecular action, and therapeutic potential of AMPs.
Collapse
Affiliation(s)
- Mohamed Hassan
- Department of Endodontics, Faculty of Dental Medicine, Strasbourg University, 67000 Strasbourg, France
- Department of Biomaterials and Bioengineering, INSERM UMR_S 1121, Biomaterials and Bioengineering, 67000 Strasbourg, France
- Research Laboratory of Surgery-Oncology, Department of Surgery, Tulane University School of Medicine, New Orleans, LA 70112, USA
- Correspondence: ; Tel.: +1-504-339-2671
| | - Thomas W. Flanagan
- Department of Pharmacology and Experimental Therapeutics, LSU Health Sciences Center, New Orleans, LA 70112, USA
| | - Naji Kharouf
- Department of Endodontics, Faculty of Dental Medicine, Strasbourg University, 67000 Strasbourg, France
- Department of Biomaterials and Bioengineering, INSERM UMR_S 1121, Biomaterials and Bioengineering, 67000 Strasbourg, France
| | - Christelle Bertsch
- Department of Endodontics, Faculty of Dental Medicine, Strasbourg University, 67000 Strasbourg, France
- Department of Biomaterials and Bioengineering, INSERM UMR_S 1121, Biomaterials and Bioengineering, 67000 Strasbourg, France
| | - Davide Mancino
- Department of Endodontics, Faculty of Dental Medicine, Strasbourg University, 67000 Strasbourg, France
- Department of Biomaterials and Bioengineering, INSERM UMR_S 1121, Biomaterials and Bioengineering, 67000 Strasbourg, France
| | - Youssef Haikel
- Department of Endodontics, Faculty of Dental Medicine, Strasbourg University, 67000 Strasbourg, France
- Department of Biomaterials and Bioengineering, INSERM UMR_S 1121, Biomaterials and Bioengineering, 67000 Strasbourg, France
| |
Collapse
|
6
|
Banerji R, Karkee A, Saroj SD. Bacteriocins against Foodborne Pathogens (Review). APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822050052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Marković KG, Grujović MŽ, Koraćević MG, Nikodijević DD, Milutinović MG, Semedo-Lemsaddek T, Djilas MD. Colicins and Microcins Produced by Enterobacteriaceae: Characterization, Mode of Action, and Putative Applications. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11825. [PMID: 36142096 PMCID: PMC9517006 DOI: 10.3390/ijerph191811825] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/12/2022] [Accepted: 09/15/2022] [Indexed: 06/15/2023]
Abstract
Enterobacteriaceae are widely present in many environments related to humans, including the human body and the food that they consume, from both plant or animal origin. Hence, they are considered relevant members of the gastrointestinal tract microbiota. On the other hand, these bacteria are also recognized as putative pathogens, able to impair human health and, in food, they are considered indicators for the microbiological quality and hygiene status of a production process. Nevertheless, beneficial properties have also been associated with Enterobacteriaceae, such as the ability to synthesize peptides and proteins, which can have a role in the structure of microbial communities. Among these antimicrobial molecules, those with higher molecular mass are called colicins, while those with lower molecular mass are named microcins. In recent years, some studies show an emphasis on molecules that can help control the development of pathogens. However, not enough data are available on this subject, especially related to microcins. Hence, this review gathers and summarizes current knowledge on colicins and microcins, potential usage in the treatment of pathogen-associated diseases and cancer, as well as putative applications in food biotechnology.
Collapse
Affiliation(s)
- Katarina G. Marković
- Institute for Information Technologies, Department of Science, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia
| | - Mirjana Ž. Grujović
- Institute for Information Technologies, Department of Science, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia
| | - Maja G. Koraćević
- Innovation Center, University of Niš, 18000 Niš, Serbia
- Faculty of Medicine, Department of Pharmacy, University of Niš, 18000 Niš, Serbia
| | - Danijela D. Nikodijević
- Faculty of Science, Department of Biology and Ecology, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Milena G. Milutinović
- Faculty of Science, Department of Biology and Ecology, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Teresa Semedo-Lemsaddek
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), 1300-477 Lisboa, Portugal
| | - Milan D. Djilas
- Institute for Public Health of Vojvodina, Futoška 121, 21000 Novi Sad, Serbia
| |
Collapse
|
8
|
Paškevičius Š, Dapkutė V, Misiūnas A, Balzaris M, Thommes P, Sattar A, Gleba Y, Ražanskienė A. Chimeric bacteriocin S5-PmnH engineered by domain swapping efficiently controls Pseudomonas aeruginosa infection in murine keratitis and lung models. Sci Rep 2022; 12:5865. [PMID: 35440606 PMCID: PMC9018753 DOI: 10.1038/s41598-022-09865-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/22/2022] [Indexed: 11/29/2022] Open
Abstract
Rampant rise of multidrug resistant strains among Gram-negative bacteria has necessitated investigation of alternative antimicrobial agents with novel modes of action including antimicrobial proteins such as bacteriocins. The main hurdle in the clinical development of bacteriocin biologics is their narrow specificity and limited strain activity spectrum. Genome mining of bacteria for broadly active bacteriocins have identified a number of promising candidates but attempts to improve these natural multidomain proteins further, for example by combining domains of different origin, have so far met with limited success. We have found that domain swapping of Pseudomonas bacteriocins of porin type, when carried out between phylogenetically related molecules with similar mechanism of activity, allows the generation of highly active molecules with broader spectrum of activity, for example by abolishing strain resistance due to the presence of immunity proteins. The most broadly active chimera engineered in this study, S5-PmnH, exhibits excellent control of Pseudomonas aeruginosa infection in validated murine keratitis and lung infection models.
Collapse
Affiliation(s)
- Šarūnas Paškevičius
- Nomads UAB, Geležinio vilko 29A, 01112, Vilnius, Lithuania.,Institute of Biotechnology, Vilnius University, Saulėtekio al. 7, 10257, Vilnius, Lithuania
| | - Viktorija Dapkutė
- Nomads UAB, Geležinio vilko 29A, 01112, Vilnius, Lithuania.,Institute of Biotechnology, Vilnius University, Saulėtekio al. 7, 10257, Vilnius, Lithuania
| | | | | | - Pia Thommes
- Evotec (UK) Ltd., Block 23, Alderley Park, Macclesfield, SK10 4TG, Cheshire, UK
| | - Abdul Sattar
- Evotec (UK) Ltd., Block 23, Alderley Park, Macclesfield, SK10 4TG, Cheshire, UK
| | - Yuri Gleba
- Nomad Bioscience GmbH, Biozentrum Halle, Weinbergweg 22, 06120, Halle (Saale), Germany
| | | |
Collapse
|
9
|
Calcuttawala F, Pal A, Nath P, Kar R, Hazra D, Pal R. Structural and functional insights into colicin: a new paradigm in drug discovery. Arch Microbiol 2021; 204:37. [PMID: 34928429 DOI: 10.1007/s00203-021-02689-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/03/2021] [Accepted: 11/03/2021] [Indexed: 11/28/2022]
Abstract
Colicins are agents of allelopathic interactions produced by certain enterobacteria which give them a competitive advantage in the environment. These protein molecules are mostly encoded by plasmids. The colicin operon consists of the activity, immunity and the lysis genes. The activity protein is responsible for the killing activity, the immunity protein protects the producer cell from the lethal action of colicin and the lysis protein facilitates its release. Colicins are primarily composed of three domains, namely the receptor-binding domain, the translocation domain and the cytotoxic domain. The protein molecule binds to its cognate receptor on the target cell via the receptor-binding domain and undergoes translocation into the cell either via the Tol system or the Ton system. After gaining entry into the target cell, there are various mechanisms by which colicins exert their lethality. These comprise DNase activity, RNase activity and pore formation in the target cell membrane or peptidoglycan synthesis inhibition. This review gives a detailed insight into the structural and functional aspect of colicins and their mode of action. This knowledge is of immense significance because colicins are being considered as very useful alternatives to conventional antibiotics in the treatment of multidrug-resistant infections. Besides, they also have a negligible harmful impact on the commensals. Thus, before tapping their therapeutic potential, it is imperative to know their structure and mechanism of action in detail.
Collapse
Affiliation(s)
- Fatema Calcuttawala
- Department of Microbiology, Sister Nivedita University, Kolkata, 700156, India.
| | - Ankita Pal
- Department of Microbiology, Sister Nivedita University, Kolkata, 700156, India
| | - Papri Nath
- Department of Microbiology, Sister Nivedita University, Kolkata, 700156, India
| | - Riya Kar
- Department of Microbiology, Sister Nivedita University, Kolkata, 700156, India
| | - Debraj Hazra
- Department of Microbiology, Sister Nivedita University, Kolkata, 700156, India
| | - Rajat Pal
- Department of Microbiology, Sister Nivedita University, Kolkata, 700156, India
| |
Collapse
|
10
|
Patel RR, Kandel PP, Traverso E, Hockett KL, Triplett LR. Pseudomonas syringae pv. phaseolicola Uses Distinct Modes of Stationary-Phase Persistence To Survive Bacteriocin and Streptomycin Treatments. mBio 2021; 12:e00161-21. [PMID: 33849974 PMCID: PMC8092213 DOI: 10.1128/mbio.00161-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/11/2021] [Indexed: 02/08/2023] Open
Abstract
Antimicrobial treatment of bacteria often results in a small population of surviving tolerant cells, or persisters, that may contribute to recurrent infection. Antibiotic persisters are metabolically dormant, but the basis of their persistence in the presence of membrane-disrupting biological compounds is less well understood. We previously found that the model plant pathogen Pseudomonas syringae pv. phaseolicola 1448A (Pph) exhibits persistence to tailocin, a membrane-disrupting biocontrol compound with potential for sustainable disease control. Here, we compared physiological traits associated with persistence to tailocin and to the antibiotic streptomycin and established that both treatments leave similar frequencies of persisters. Microscopic profiling of treated populations revealed that while tailocin rapidly permeabilizes most cells, streptomycin treatment results in a heterogeneous population in the redox and membrane permeability state. Intact cells were sorted into three fractions according to metabolic activity, as indicated by a redox-sensing reporter dye. Streptomycin persisters were cultured from the fraction associated with the lowest metabolic activity, but tailocin persisters were cultured from a fraction associated with an active metabolic signal. Cells from culturable fractions were able to infect host plants, while the nonculturable fractions were not. Tailocin and streptomycin were effective in eliminating all persisters when applied sequentially, in addition to eliminating cells in other viable states. This study identifies distinct metabolic states associated with antibiotic persistence, tailocin persistence, and loss of virulence and demonstrates that tailocin is highly effective in eliminating dormant cells.IMPORTANCE Populations of genetically identical bacteria encompass heterogeneous physiological states. The small fraction of bacteria that are dormant can help the population survive exposure to antibiotics and other stresses, potentially contributing to recurring infection cycles in animal or plant hosts. Membrane-disrupting biological control treatments are effective in killing dormant bacteria, but these treatments also leave persister-like survivors. The current work demonstrates that in Pph, persisters surviving treatment with membrane-disrupting tailocin proteins have an elevated redox state compared to that of dormant streptomycin persisters. Combination treatment was effective in killing both persister types. Culturable persisters corresponded closely with infectious cells in each treated population, whereas the high-redox and unculturable fractions were not infectious. In linking redox states to heterogeneous phenotypes of tailocin persistence, streptomycin persistence, and infection capability, this work will inform the search for mechanisms and markers for each phenotype.
Collapse
Affiliation(s)
- Ravikumar R Patel
- Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, Connecticut, USA
| | - Prem P Kandel
- Department of Plant Pathology and Environmental Microbiology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Eboni Traverso
- Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, Connecticut, USA
| | - Kevin L Hockett
- Department of Plant Pathology and Environmental Microbiology, The Pennsylvania State University, University Park, Pennsylvania, USA
- Center for Infectious Disease Dynamics, Pennsylvania State University, University Park, Pennsylvania, USA
- Huck Institutes for the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Lindsay R Triplett
- Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, Connecticut, USA
| |
Collapse
|
11
|
Ghoreishi FS, Roghanian R, Emtiazi G. Novel Chronic Wound Healing by Anti-biofilm Peptides and Protease. Adv Pharm Bull 2021; 12:424-436. [PMID: 35935044 PMCID: PMC9348543 DOI: 10.34172/apb.2022.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/23/2021] [Accepted: 03/25/2021] [Indexed: 11/25/2022] Open
Abstract
Chronic wounds have made a challenge in medical healthcare due to their biofilm infections, which reduce the penetrance of the antibacterial agents in the injury site. In infected wounds, the most common bacterial strains are Staphylococcus aureus and Pseudomonas aeruginosa. Biofilm disruption in chronic wounds is crucial in wound healing. Due to their broad-spectrum antibacterial properties and fewer side effects, anti-biofilm peptides, especially bacteriocins, are promising in the healing of chronic wounds by biofilm destruction. This study reviews the effects of antimicrobial and anti-biofilm agents, including bacteriocins and protease enzymes as a novel approach, on wound healing, along with analyzing the molecular docking between a bacterial protease and biofilm components. Among a large number of anti-biofilm bacteriocins identified up to now, seven types have been registered in the antimicrobial peptides (AMPs) database. Although it is believed that bacterial proteases are harmful in wound healing, it has recently been demonstrated that these proteases like the human serine protease, in combination with AMPs, can improve wound healing by biofilm destruction. In this work, docking results between metalloprotease from Paenibacillus polymyxa and proteins of S. aureus and P. aeruginosa involved in biofilm production, showed that this bacterial protease could efficiently interact with biofilm components. Infected wound healing is an important challenge in clinical trials due to biofilm production by bacterial pathogens. Therefore, simultaneous use of proteases or anti-biofilm peptides with antimicrobial agents could be a promising method for chronic wound healing.
Collapse
Affiliation(s)
- Fatemeh Sadat Ghoreishi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Rasoul Roghanian
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Giti Emtiazi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| |
Collapse
|
12
|
Shushan A, Kosloff M. Structural design principles for specific ultra-high affinity interactions between colicins/pyocins and immunity proteins. Sci Rep 2021; 11:3789. [PMID: 33589691 PMCID: PMC7884437 DOI: 10.1038/s41598-021-83265-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 01/28/2021] [Indexed: 12/13/2022] Open
Abstract
The interactions of the antibiotic proteins colicins/pyocins with immunity proteins is a seminal model system for studying protein–protein interactions and specificity. Yet, a precise and quantitative determination of which structural elements and residues determine their binding affinity and specificity is still lacking. Here, we used comparative structure-based energy calculations to map residues that substantially contribute to interactions across native and engineered complexes of colicins/pyocins and immunity proteins. We show that the immunity protein α1–α2 motif is a unique structurally-dissimilar element that restricts interaction specificity towards all colicins/pyocins, in both engineered and native complexes. This motif combines with a diverse and extensive array of electrostatic/polar interactions that enable the exquisite specificity that characterizes these interactions while achieving ultra-high affinity. Surprisingly, the divergence of these contributing colicin residues is reciprocal to residue conservation in immunity proteins. The structurally-dissimilar immunity protein α1–α2 motif is recognized by divergent colicins similarly, while the conserved immunity protein α3 helix interacts with diverse colicin residues. Electrostatics thus plays a key role in setting interaction specificity across all colicins and immunity proteins. Our analysis and resulting residue-level maps illuminate the molecular basis for these protein–protein interactions, with implications for drug development and rational engineering of these interfaces.
Collapse
Affiliation(s)
- Avital Shushan
- The Department of Human Biology, Faculty of Natural Sciences, University of Haifa, 199 Aba Khoushy Ave., Mt. Carmel, 3498838, Haifa, Israel
| | - Mickey Kosloff
- The Department of Human Biology, Faculty of Natural Sciences, University of Haifa, 199 Aba Khoushy Ave., Mt. Carmel, 3498838, Haifa, Israel.
| |
Collapse
|
13
|
Snopkova K, Dufkova K, Klimesova P, Vanerkova M, Ruzicka F, Hola V. Prevalence of bacteriocins and their co-association with virulence factors within Pseudomonas aeruginosa catheter isolates. Int J Med Microbiol 2020; 310:151454. [PMID: 33068882 DOI: 10.1016/j.ijmm.2020.151454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 09/09/2020] [Accepted: 09/27/2020] [Indexed: 11/29/2022] Open
Abstract
Urinary tract infections represent common nosocomial infectious diseases. Bacteriocin production has been recently described as a putative virulence factor in these infections but studies focusing particularly on Pseudomonas aeruginosa are not available. Therefore, we assessed the prevalence of the bacteriocin genes, their co-occurrence and their co-association with previously detected virulence factors in a set of 135 P. aeruginosa strains from catheter-associated urinary tract infections (CAUTIs). The overall bacteriocinogeny reached 96.3 % with an average of 3.6 genes per strain. The most frequently detected determinants were the encoded pyocins S4 (76.3 %), R (69.6 %), and S2 (67.4 %). A statistically significant co-occurrence and a negative relationship were observed between several pyocin types. Particular pyocins exhibited associations with biofilm formation, production of pyochelin, pyocyanin, antibiotic-degrading enzymes, overall strain susceptibility and resistance, and motility of the strain. Co-occurrence of the pyocins S2 and S4 (p<<0.0001; Z = 13.15), both utilizating the ferripyoverdine receptor FpvAI, was found but no relation to pyoverdine production was detected. A negative association (p = 0.0047; Z=-2.83) was observed between pyochelin and pyocin S5 utilising the ferripyochelin receptor FptA. Pairwise assays resulted in 52.1 % inhibition which was equally distributed between soluble and particle types of antimicrobials. In conclusion, pyocin determinants appear to be important characteristics of CAUTI-related P. aeruginosa isolates and could contribute to their urovirulence.
Collapse
Affiliation(s)
- Katerina Snopkova
- Institute for Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - Kristyna Dufkova
- Institute for Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - Petra Klimesova
- Institute for Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - Martina Vanerkova
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Pekarska 53, 656 91 Brno, Czech Republic
| | - Filip Ruzicka
- Institute for Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - Veronika Hola
- Institute for Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic.
| |
Collapse
|
14
|
Zhang K, Li X, Yu C, Wang Y. Promising Therapeutic Strategies Against Microbial Biofilm Challenges. Front Cell Infect Microbiol 2020; 10:359. [PMID: 32850471 PMCID: PMC7399198 DOI: 10.3389/fcimb.2020.00359] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 06/10/2020] [Indexed: 12/17/2022] Open
Abstract
Biofilms are communities of microorganisms that are attached to a biological or abiotic surface and are surrounded by a self-produced extracellular matrix. Cells within a biofilm have intrinsic characteristics that are different from those of planktonic cells. Biofilm resistance to antimicrobial agents has drawn increasing attention. It is well-known that medical device- and tissue-associated biofilms may be the leading cause for the failure of antibiotic treatments and can cause many chronic infections. The eradication of biofilms is very challenging. Many researchers are working to address biofilm-related infections, and some novel strategies have been developed and identified as being effective and promising. Nevertheless, more preclinical studies and well-designed multicenter clinical trials are critically needed to evaluate the prospects of these strategies. Here, we review information about the mechanisms underlying the drug resistance of biofilms and discuss recent progress in alternative therapies and promising strategies against microbial biofilms. We also summarize the strengths and weaknesses of these strategies in detail.
Collapse
Affiliation(s)
- Kaiyu Zhang
- Department of Infectious Diseases, First Hospital of Jilin University, Changchun, China
| | - Xin Li
- Department of Infectious Diseases, First Hospital of Jilin University, Changchun, China
| | - Chen Yu
- Department of Infectious Diseases, First Hospital of Jilin University, Changchun, China
| | - Yang Wang
- Department of Infectious Diseases, First Hospital of Jilin University, Changchun, China.,Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| |
Collapse
|
15
|
Fang K, Park OJ, Hong SH. Controlling biofilms using synthetic biology approaches. Biotechnol Adv 2020; 40:107518. [PMID: 31953206 PMCID: PMC7125041 DOI: 10.1016/j.biotechadv.2020.107518] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 01/09/2020] [Accepted: 01/11/2020] [Indexed: 12/22/2022]
Abstract
Bacterial biofilms are formed by the complex but ordered regulation of intra- or inter-cellular communication, environmentally responsive gene expression, and secretion of extracellular polymeric substances. Given the robust nature of biofilms due to the non-growing nature of biofilm bacteria and the physical barrier provided by the extracellular matrix, eradicating biofilms is a very difficult task to accomplish with conventional antibiotic or disinfectant treatments. Synthetic biology holds substantial promise for controlling biofilms by improving and expanding existing biological tools, introducing novel functions to the system, and re-conceptualizing gene regulation. This review summarizes synthetic biology approaches used to eradicate biofilms via protein engineering of biofilm-related enzymes, utilization of synthetic genetic circuits, and the development of functional living agents. Synthetic biology also enables beneficial applications of biofilms through the production of biomaterials and patterning biofilms with specific temporal and spatial structures. Advances in synthetic biology will add novel biofilm functionalities for future therapeutic, biomanufacturing, and environmental applications.
Collapse
Affiliation(s)
- Kuili Fang
- Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - Oh-Jin Park
- Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA; Department of Biological and Chemical Engineering, Yanbian University of Science and Technology, Yanji, Jilin, People's Republic of China
| | - Seok Hoon Hong
- Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA.
| |
Collapse
|
16
|
Denkovskienė E, Paškevičius Š, Misiūnas A, Stočkūnaitė B, Starkevič U, Vitkauskienė A, Hahn-Löbmann S, Schulz S, Giritch A, Gleba Y, Ražanskienė A. Broad and Efficient Control of Klebsiella Pathogens by Peptidoglycan-Degrading and Pore-Forming Bacteriocins Klebicins. Sci Rep 2019; 9:15422. [PMID: 31659220 PMCID: PMC6817936 DOI: 10.1038/s41598-019-51969-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/09/2019] [Indexed: 01/15/2023] Open
Abstract
Gram-negative bacteria belonging to the genus Klebsiella are important nosocomial pathogens, readily acquiring resistance to all known antibiotics. Bacteriocins, non-antibiotic antibacterial proteins, have been earlier proposed as potential therapeutic agents for control of other Gram-negative species such as Escherichia, Pseudomonas and Salmonella. This study is the first report describing pore-forming and peptidoglycan-degrading bacteriocins klebicins from Klebsiella. We have identified, cloned, expressed in plants and characterized nine pore-forming and peptidoglycan-degrading bacteriocins from different Klebsiella species. We demonstrate that klebicins can be used for broad and efficient control of 101 of the 107 clinical isolates representing five Klebsiella species, including multi-drug resistant pathovars and pathovars resistant to carbapenem antibiotics.
Collapse
Affiliation(s)
| | - Šarūnas Paškevičius
- Nomads UAB, Geležinio vilko 29A, LT-01112, Vilnius, Lithuania
- Vilnius University, Institute of Biotechnology, Saulėtekio al. 7, LT-10257, Vilnius, Lithuania
| | | | | | - Urtė Starkevič
- Nomads UAB, Geležinio vilko 29A, LT-01112, Vilnius, Lithuania
| | - Astra Vitkauskienė
- Lithuanian University of Health Sciences, Department of Laboratory Medicine, Eivenių g. 2, LT-50161, Kaunas, Lithuania
| | - Simone Hahn-Löbmann
- Nomad Bioscience GmbH, Biozentrum Halle, Weinbergweg 22, D-06120, Halle (Saale), Germany
| | - Steve Schulz
- Nomad Bioscience GmbH, Biozentrum Halle, Weinbergweg 22, D-06120, Halle (Saale), Germany
| | - Anatoli Giritch
- Nomad Bioscience GmbH, Biozentrum Halle, Weinbergweg 22, D-06120, Halle (Saale), Germany
| | - Yuri Gleba
- Nomad Bioscience GmbH, Biozentrum Halle, Weinbergweg 22, D-06120, Halle (Saale), Germany
| | | |
Collapse
|
17
|
Hahn-Löbmann S, Stephan A, Schulz S, Schneider T, Shaverskyi A, Tusé D, Giritch A, Gleba Y. Colicins and Salmocins - New Classes of Plant-Made Non-antibiotic Food Antibacterials. FRONTIERS IN PLANT SCIENCE 2019; 10:437. [PMID: 31024601 PMCID: PMC6465592 DOI: 10.3389/fpls.2019.00437] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/22/2019] [Indexed: 06/09/2023]
Abstract
Recently, several plant-made recombinant proteins received favorable regulatory review as food antibacterials in the United States through the Generally Recognized As Safe (GRAS) regulatory procedure, and applications for others are pending. These food antimicrobials, along with approved biopharmaceuticals and vaccines, represent new classes of products manufactured in green plants as production hosts. We present results of new research and development and summarize regulatory, economic and business aspects of the antibacterial proteins colicins and salmocins as new food processing aids.
Collapse
Affiliation(s)
| | | | | | | | | | - Daniel Tusé
- DT/Consulting Group, Sacramento, CA, United States
| | | | | |
Collapse
|
18
|
Lopes LQS, de Almeida Vaucher R, Giongo JL, Gündel A, Santos RCV. Characterisation and anti-biofilm activity of glycerol monolaurate nanocapsules against Pseudomonas aeruginosa. Microb Pathog 2019; 130:178-185. [PMID: 30862561 DOI: 10.1016/j.micpath.2019.03.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 03/03/2019] [Accepted: 03/06/2019] [Indexed: 01/20/2023]
Abstract
Pseudomonas aeruginosa is a ubiquitous microorganism that commonly causes hospital-acquired infections, including pneumonia, bloodstream and urinary tract infections and it is well known for chronically colonising the respiratory tract of patients with cystic fibrosis, causing severe intermittent exacerbation of the condition. P. aeruginosa may appear in the free form cell but also grows in biofilm communities adhered to a surface. An alternative to conventional antimicrobial agents are nanoparticles that can act as carriers for antibiotics and other drugs. In this context, the study aimed to characterise and verify the anti-biofilm potential of GML Nanocapsules against P. aeruginosa. The nanocapsules showed a mean diameter of 190.7 nm, polydispersion index of 0.069, the zeta potential of -23.3 mV. The microdilution test showed a MIC of 62.5 μg/mL to GML and 15.62 μg/mL to GML Nanocapsules. The anti-biofilm experiments demonstrated the significant reduction of biomass, proteins, polysaccharide and viable P. aeruginosa in biofilm treated with GML Nanocapsules while the free GML did not cause an effect. The AFM images showed a decrease in a biofilm which received GML. The positive results suggest an alternative for the public health trouble related to infections associated with biofilm.
Collapse
Affiliation(s)
- Leonardo Quintana Soares Lopes
- Post Graduate Program in Nanosciences, Universidade Franciscana, Santa Maria, Brazil; Microbiology and Parasitology Department, Health Sciences Center, Universidade Federal de Santa Maria, Santa Maria, Brazil.
| | - Rodrigo de Almeida Vaucher
- Laboratory of Research in Biochemistry and Molecular Biology of Microorganisms, Post Graduate Program in Biochemistry and Bioprospecting, Universidade Federal de Pelotas, Capão Do Leão, Brazil
| | | | | | - Roberto Christ Vianna Santos
- Post Graduate Program in Nanosciences, Universidade Franciscana, Santa Maria, Brazil; Microbiology and Parasitology Department, Health Sciences Center, Universidade Federal de Santa Maria, Santa Maria, Brazil
| |
Collapse
|
19
|
Escherichia coli isolates from patients with inflammatory bowel disease: ExPEC virulence- and colicin-determinants are more frequent compared to healthy controls. Int J Med Microbiol 2018; 308:498-504. [PMID: 29735381 DOI: 10.1016/j.ijmm.2018.04.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 04/04/2018] [Accepted: 04/30/2018] [Indexed: 12/12/2022] Open
Abstract
A set of 178 Escherichia coli isolates taken from patients with inflammatory bowel disease (IBD) was analyzed for bacteriocin production and tested for the prevalence of 30 bacteriocin and 22 virulence factor determinants. Additionally, E. coli phylogenetic groups were also determined. Pulsed-field gel electrophoresis (PFGE) was used for exclusion of clonal character of isolates. Results were compared to data from a previously published analysis of 1283 fecal commensal E. coli isolates. The frequency of bacteriocinogenic isolates (66.9%) was significantly higher in IBD E. coli compared to fecal commensal E. coli isolates (54.2%, p < 0.01). In the group of IBD E. coli isolates, a higher prevalence of determinants for group B colicins (i.e., colicins B, D, Ia, Ib, M, and 5/10) (p < 0.01), including a higher prevalence of the colicin B determinant (p < 0.01) was found. Virulence factor determinants encoding fimbriae (fimA, 91.0%; pap, 27.5%), cytotoxic necrotizing factor (cnf1, 11.2%), aerobactin synthesis (aer, 43.3%), and the locus associated with invasivity (ial, 9.0%) were more prevalent in IBD E. coli (p < 0.05 for all five determinants). E. coli isolates from IBD mucosal biopsies were more frequently bacteriocinogenic (84.6%, p < 0.01) compared to fecal IBD isolates and fecal commensal E. coli. PFGE analysis revealed clusters specific for IBD E. coli isolates (n = 11), for fecal isolates (n = 13), and clusters containing both IBD and fecal isolates (n = 10). ExPEC (Extraintestinal Pathogenic E. coli) virulence and colicin determinants appear to be important characteristics of IBD E. coli isolates, especially the E. coli isolates obtained directly from biopsy samples.
Collapse
|
20
|
Rhodes NJ, Cruce CE, O'Donnell JN, Wunderink RG, Hauser AR. Resistance Trends and Treatment Options in Gram-Negative Ventilator-Associated Pneumonia. Curr Infect Dis Rep 2018; 20:3. [PMID: 29511909 DOI: 10.1007/s11908-018-0609-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF REVIEW Hospital-acquired and ventilator-associated pneumonia (VAP) are frequent causes of infection among critically ill patients. VAP is the most common hospital-acquired bacterial infection among mechanically ventilated patients. Unfortunately, many of the nosocomial Gram-negative bacteria that cause VAP are increasingly difficult to treat. Additionally, the evolution and dissemination of multi- and pan-drug resistant strains leave clinicians with few treatment options. VAP patients represent a dynamic population at risk for antibiotic failure and under-dosing due to altered antibiotic pharmacokinetic parameters. Since few antibiotic agents have been approved within the last 15 years, and no new agents specifically targeting VAP have been approved to date, it is anticipated that this problem will worsen. Given the public health crisis posed by resistant Gram-negative bacteria, it is essential to establish a firm understanding of the current epidemiology of VAP, the changing trends in Gram-negative resistance in VAP, and the current issues in drug development for Gram-negative bacteria that cause VAP. RECENT FINDINGS Rapid identification technologies and phenotypic methods, new therapeutic strategies, and novel treatment paradigms have evolved in an attempt to improve treatment outcomes for VAP; however, clinical data supporting alternative treatment strategies and adjunctive therapies remain sparse. Importantly, new classes of antimicrobials, novel virulence factor inhibitors, and beta-lactam/beta-lactamase inhibitor combinations are currently in development. Conscientious stewardship of new and emerging therapeutic agents will be needed to ensure they remain effective well into the future.
Collapse
Affiliation(s)
- Nathaniel J Rhodes
- Department of Pharmacy Practice, Midwestern University, Chicago College of Pharmacy, 555 31st St., Downers Grove, IL, 60515, USA. .,Department of Pharmacy, Northwestern Memorial Hospital, Chicago, IL, USA.
| | - Caroline E Cruce
- Department of Pharmacy Practice, Midwestern University, Chicago College of Pharmacy, 555 31st St., Downers Grove, IL, 60515, USA.,Department of Pharmacy, Northwestern Memorial Hospital, Chicago, IL, USA
| | - J Nicholas O'Donnell
- Department of Pharmacy Practice, Albany College of Pharmacy and Health Sciences, Albany, NY, USA
| | - Richard G Wunderink
- Department of Internal Medicine, Division of Pulmonary Critical Care, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Alan R Hauser
- Department of Internal Medicine, Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| |
Collapse
|
21
|
Plant-expressed pyocins for control of Pseudomonas aeruginosa. PLoS One 2017; 12:e0185782. [PMID: 28973027 PMCID: PMC5626474 DOI: 10.1371/journal.pone.0185782] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 09/19/2017] [Indexed: 01/01/2023] Open
Abstract
The emergence, persistence and spread of antibiotic-resistant human pathogenic bacteria heralds a growing global health crisis. Drug-resistant strains of gram-negative bacteria, such as Pseudomonas aeruginosa, are especially dangerous and the medical and economic burden they impose underscore the critical need for finding new antimicrobials. Recent studies have demonstrated that plant-expressed bacteriocins of the colicins family can be efficient antibacterials against all major enteropathogenic strains of E. coli. We extended our studies of colicin-like bacteriocins to pyocins, which are produced by strains of P. aeruginosa for ecological advantage against other strains of the same species. Using a plant-based transient expression system, we expressed six different pyocins, namely S5, PaeM, L1, L2, L3 and one new pyocin, PaeM4, and purified them to homogeneity. Among these pyocins, PaeM4 demonstrated the broadest spectrum of activity by controlling 53 of 100 tested clinical isolates of P. aeruginosa. The activity of plant-made pyocins was confirmed in the agar drop, liquid culture susceptibility and biofilm assays, and in the Galleria mellonella animal infection model.
Collapse
|
22
|
The therapeutic potential of bacteriocins as protein antibiotics. Emerg Top Life Sci 2017; 1:65-74. [PMID: 33525816 PMCID: PMC7243282 DOI: 10.1042/etls20160016] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 03/14/2017] [Accepted: 03/16/2017] [Indexed: 02/07/2023]
Abstract
The growing incidence of antibiotic-resistant Gram-negative bacterial infections poses a serious threat to public health. Molecules that have yet to be exploited as antibiotics are potent protein toxins called bacteriocins that are produced by Gram-negative bacteria during competition for ecological niches. This review discusses the state of the art regarding the use for therapeutic purposes of two types of Gram-negative bacteriocins: colicin-like bacteriocins (CLBs) and tailocins. In addition to in vitro data, the potency of eight identified CLBs or tailocins has been demonstrated in diverse animal models of infection with no adverse effects for the host. Although the characteristics of bacteriocins will need further study, results obtained thus far regarding their in vivo potency, immunogenicity and low levels of resistance are encouraging. This leads the way for the development of novel treatments using bacteriocins as protein antibiotics.
Collapse
|
23
|
Shokri D, Rabbani Khorasgani M, Zaghian S, Fatemi SM, Mohkam M, Ghasemi Y, Taheri-Kafrani A. Determination of Acquired Resistance Profiles of Pseudomonas aeruginosa Isolates and Characterization of an Effective Bacteriocin-Like Inhibitory Substance (BLIS) Against These Isolates. Jundishapur J Microbiol 2016; 9:e32795. [PMID: 27800131 PMCID: PMC5080677 DOI: 10.5812/jjm.32795] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 12/25/2015] [Accepted: 04/18/2016] [Indexed: 01/29/2023] Open
Abstract
Background The emergence of pan-drug resistant strains (PDR) of Pseudomonas aeruginosa has led to renewed efforts to identify alternative agents, such as bacteriocins and bacteriocin-like inhibitory substances (BLISs). Objectives The aims of this study were to determine the acquired resistance profiles of multidrug-resistant (MDR), extensively drug-resistant (XDR), and PDR P. aeruginosa isolates based on the revised definitions of the CDC and ECDC and to screen and characterize effective BLISs against these isolates. Patients and Materials In a cross-sectional study, 96 P. aeruginosa strains were isolated during a 12-month period. The resistance profiles of these isolates were determined as MDR, XDR, and PDR, and the data were analyzed using WHONET5.6 software. A BLIS against the P. aeruginosa strains was characterized based on its physicochemical properties, size, growth curves, and production profiles. Results Among the 96 isolates of P. aeruginosa, 2 (2.1%), 94 (97.9%), and 63 (65.6%) were non-MDR, MDR, and XDR, respectively, and 1 (1.1%) was PDR. The most effective antibiotics against these isolates were polymyxins and fosfomycin. A BLIS isolated from the P. aeruginosa DSH22 strain had potent activity against 92 (95.8%) of the 96 isolates. The BLIS was heat stable, (up to 100°C for 10 min), UV stable, and active within a pH range of 3 - 9. The activity of BLIS disappeared when treated with trypsin, proteinase K, and pepsin, indicating its proteinous nature. Based on its size (25 kDa), the BLIS may belong to the large colicin-like bacteriocin family. BLIS production started in the midexponential phase of growth, and the maximum level (2700 AU/mL) occurred in the late-stationary phase after 25 hours of incubation at 30°C. Conclusions This BLIS with broad-spectrum activity may be a potential agent for the treatment or control of drug-resistant strains of P. aeruginosa infection.
Collapse
Affiliation(s)
- Dariush Shokri
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, IR Iran
| | - Mohammad Rabbani Khorasgani
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, IR Iran
- Corresponding author: Mohammad Rabbani Khorasgani, Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, IR Iran. Tel: +98-03137932480, Fax: +98-3137932456, E-mail:
| | - Saeideh Zaghian
- Nanobiotechnology Department, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, IR Iran
| | - Seyed Masih Fatemi
- Department of Microbiology, Faculty of Basic Sciences, Shahrekord Branch, Islamic Azad University, Shahrekord, IR Iran
| | - Milad Mohkam
- Department of Pharmaceutical Biotechnology, Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Younes Ghasemi
- Department of Pharmaceutical Biotechnology, Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Asghar Taheri-Kafrani
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, IR Iran
| |
Collapse
|
24
|
Taneja N, Kaur H. Insights into Newer Antimicrobial Agents Against Gram-negative Bacteria. Microbiol Insights 2016; 9:9-19. [PMID: 27013887 PMCID: PMC4803319 DOI: 10.4137/mbi.s29459] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 01/04/2016] [Accepted: 01/11/2016] [Indexed: 02/06/2023] Open
Abstract
Currently, drug resistance, especially against cephalosporins and carbapenems, among gram-negative bacteria is an important challenge, which is further enhanced by the limited availability of drugs against these bugs. There are certain antibiotics (colistin, fosfomycin, temocillin, and rifampicin) that have been revived from the past to tackle the menace of superbugs, including members of Enterobacteriaceae, Acinetobacter species, and Pseudomonas species. Very few newer antibiotics have been added to the pool of existing drugs. There are still many antibiotics that are passing through various phases of clinical trials. The initiative of Infectious Disease Society of America to develop 10 novel antibiotics against gram-negative bacilli by 2020 is a step to fill the gap of limited availability of drugs. This review aims to provide insights into the current and newer drugs in pipeline for the treatment of gram-negative bacteria and also discusses the major challenging issues for their management.
Collapse
Affiliation(s)
- Neelam Taneja
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Harsimran Kaur
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| |
Collapse
|
25
|
Kohoutova D, Smajs D, Moravkova P, Cyrany J, Moravkova M, Forstlova M, Cihak M, Rejchrt S, Bures J. Escherichia coli strains of phylogenetic group B2 and D and bacteriocin production are associated with advanced colorectal neoplasia. BMC Infect Dis 2014; 14:733. [PMID: 25540872 PMCID: PMC4300055 DOI: 10.1186/s12879-014-0733-7] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 12/19/2014] [Indexed: 02/07/2023] Open
Abstract
Background Colorectal cancer (CRC) is the 3rd most common cancer worldwide and the Czech Republic has the 6th highest incidence of CRC worldwide. Large intestinal microbiota play in its etiopathogenesis important role. Bacteriocins are proteins, produced by bacteria from the Enterobacteriaceae family. The aim of our prospective study was to assess the colonization of large intestinal mucosa by Escherichia coli strains and to investigate their bacteriocin production. Methods A total of 30 consecutive patients with colorectal adenoma, CRA (17 men, 13 women, aged 39–79, mean age 63 ± 9), 30 patients with CRC (23 men, 7 women, aged 38–86, mean age 67 ± 11) and 20 healthy controls (9 men, 11 women, age 23–84, mean age 55 ± 15) were enrolled into prospective study. Mucosal biopsies were taken in the caecum, transverse colon and rectum during pancolonoscopy. Microbiological culture, isolation and identification of bacteria followed. Bacteriocin production was assessed by growth inhibition of indicator strains E. coli K12-Row, E. coli C6 (phi), and Shigella sonnei 17. Identification of bacteriocin-encoding determinants and E. coli phylogroups was performed using PCR methods. Results A total of 622 strains were isolated and further investigated. A significantly higher frequency of simultaneous production of colicins and microcins was revealed in the group of patients with CRC, when compared to patients with CRA, p = 0.031. A significantly higher frequency of E. coli phylogroup D was found in patients with CRC, when compared to controls, p = 0.044. A significantly higher prevalence of bacteriocinogeny was confirmed in patients with advanced adenoma when compared to patients with non-advanced adenoma, p = 0.010. Increasing bacteriocinogeny was associated with an increasing stage of CRC (assessed according to TNM classification). Either E. coli phylogroup B2 or E. coli phylogroup D were isolated in biopsies of patients with right-sided CRC. A statistically higher incidence of E. coli phylogroup B2 was found in patients with right-sided CRC when compared to patients with left-sided CRC, p = 0.028. Conclusions Large intestinal mucosa of patients with more advanced colorectal neoplasia is colonized with more virulent strains of E. coli and higher production of bacteriocins is observed in these patients when compared to those with less advanced colorectal neoplasia. Electronic supplementary material The online version of this article (doi:10.1186/s12879-014-0733-7) contains supplementary material, which is available to authorized users.
Collapse
|
26
|
Kim YC, Tarr AW, Penfold CN. Colicin import into E. coli cells: a model system for insights into the import mechanisms of bacteriocins. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2014; 1843:1717-31. [PMID: 24746518 DOI: 10.1016/j.bbamcr.2014.04.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 04/04/2014] [Accepted: 04/06/2014] [Indexed: 01/03/2023]
Abstract
Bacteriocins are a diverse group of ribosomally synthesized protein antibiotics produced by most bacteria. They range from small lanthipeptides produced by lactic acid bacteria to much larger multi domain proteins of Gram negative bacteria such as the colicins from Escherichia coli. For activity bacteriocins must be released from the producing cell and then bind to the surface of a sensitive cell to instigate the import process leading to cell death. For over 50years, colicins have provided a working platform for elucidating the structure/function studies of bacteriocin import and modes of action. An understanding of the processes that contribute to the delivery of a colicin molecule across two lipid membranes of the cell envelope has advanced our knowledge of protein-protein interactions (PPI), protein-lipid interactions and the role of order-disorder transitions of protein domains pertinent to protein transport. In this review, we provide an overview of the arrangement of genes that controls the synthesis and release of the mature protein. We examine the uptake processes of colicins from initial binding and sequestration of binding partners to crossing of the outer membrane, and then discuss the translocation of colicins through the cell periplasm and across the inner membrane to their cytotoxic site of action. This article is part of a Special Issue entitled: Protein trafficking and secretion in bacteria. Guest Editors: Anastassios Economou and Ross Dalbey.
Collapse
Affiliation(s)
- Young Chan Kim
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, NG7 2UH, UK
| | - Alexander W Tarr
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, NG7 2UH, UK
| | - Christopher N Penfold
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, NG7 2UH, UK.
| |
Collapse
|
27
|
McCaughey LC, Grinter R, Josts I, Roszak AW, Waløen KI, Cogdell RJ, Milner J, Evans T, Kelly S, Tucker NP, Byron O, Smith B, Walker D. Lectin-like bacteriocins from Pseudomonas spp. utilise D-rhamnose containing lipopolysaccharide as a cellular receptor. PLoS Pathog 2014; 10:e1003898. [PMID: 24516380 PMCID: PMC3916391 DOI: 10.1371/journal.ppat.1003898] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 12/10/2013] [Indexed: 11/24/2022] Open
Abstract
Lectin-like bacteriocins consist of tandem monocot mannose-binding domains and display a genus-specific killing activity. Here we show that pyocin L1, a novel member of this family from Pseudomonas aeruginosa, targets susceptible strains of this species through recognition of the common polysaccharide antigen (CPA) of P. aeruginosa lipopolysaccharide that is predominantly a homopolymer of d-rhamnose. Structural and biophysical analyses show that recognition of CPA occurs through the C-terminal carbohydrate-binding domain of pyocin L1 and that this interaction is a prerequisite for bactericidal activity. Further to this, we show that the previously described lectin-like bacteriocin putidacin L1 shows a similar carbohydrate-binding specificity, indicating that oligosaccharides containing d-rhamnose and not d-mannose, as was previously thought, are the physiologically relevant ligands for this group of bacteriocins. The widespread inclusion of d-rhamnose in the lipopolysaccharide of members of the genus Pseudomonas explains the unusual genus-specific activity of the lectin-like bacteriocins. Due to rapidly increasing rates of antibiotic resistance observed among Gram-negative pathogens, such as Pseudomonas aeruginosa, there is an urgent requirement for novel approaches to the treatment of bacterial infections. Lectin-like bacteriocins are highly potent protein antibiotics that display an unusual ability to kill a select group of bacteria within a specific genus. In this work, we show how the lectin-like protein antibiotic, pyocin L1, can kill Pseudomonas aeruginosa with extraordinary potency through specific binding to the common polysaccharide antigen (CPA) of P. aeruginosa lipopolysaccharide. The CPA is predominantly a homopolymer of the sugar d-rhamnose that although generally rare in nature is found frequently as a component of the lipopolysaccharide of members of the genus Pseudomonas. The targeting of d-rhamnose containing polysaccharides by pyocin L1 and a related lectin-like protein antibiotic, putidacin L1, explains the unusual genus- specific killing activity of the lectin-like bacteriocins. As we learn more about the link between changes to the microbiome and a range of chronic diseases there is a growing realisation that the ability to target specific bacterial pathogens while maintaining the normal gut flora is a desirable property for next generation antibiotics.
Collapse
Affiliation(s)
- Laura C. McCaughey
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Rhys Grinter
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Inokentijs Josts
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Aleksander W. Roszak
- WestCHEM, School of Chemistry, College of Science and Engineering, University of Glasgow, Glasgow, United Kingdom
- Institute of Molecular Cell and Systems Biology, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Kai I. Waløen
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
- School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Richard J. Cogdell
- Institute of Molecular Cell and Systems Biology, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Joel Milner
- Institute of Molecular Cell and Systems Biology, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Tom Evans
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Sharon Kelly
- Institute of Molecular Cell and Systems Biology, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Nicholas P. Tucker
- Strathclyde Institute for Pharmaceutical and Biomedical Sciences, University of Strathclyde, Glasgow, United Kingdom
| | - Olwyn Byron
- School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Brian Smith
- Institute of Molecular Cell and Systems Biology, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Daniel Walker
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
- * E-mail:
| |
Collapse
|
28
|
Ghequire MGK, De Canck E, Wattiau P, Van Winge I, Loris R, Coenye T, De Mot R. Antibacterial activity of a lectin-like Burkholderia cenocepacia protein. Microbiologyopen 2013; 2:566-75. [PMID: 23737242 PMCID: PMC3831624 DOI: 10.1002/mbo3.95] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 04/29/2013] [Accepted: 05/06/2013] [Indexed: 12/13/2022] Open
Abstract
Bacteriocins of the LlpA family have previously been characterized in the γ-proteobacteria Pseudomonas and Xanthomonas. These proteins are composed of two MMBL (monocot mannose-binding lectin) domains, a module predominantly and abundantly found in lectins from monocot plants. Genes encoding four different types of LlpA-like proteins were identified in genomes from strains belonging to the Burkholderia cepacia complex (Bcc) and the Burkholderia pseudomallei group. A selected recombinant LlpA-like protein from the human isolate Burkholderia cenocepacia AU1054 displayed narrow-spectrum genus-specific antibacterial activity, thus representing the first functionally characterized bacteriocin within this β-proteobacterial genus. Strain-specific killing was confined to other members of the Bcc, with mostly Burkholderia ambifaria strains being susceptible. In addition to killing planktonic cells, this bacteriocin also acted as an antibiofilm agent.
Collapse
Affiliation(s)
- Maarten G K Ghequire
- Centre of Microbial and Plant Genetics, University of Leuven, Kasteelpark Arenberg 20 box 2460, 3001, Heverlee-Leuven, Belgium
| | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
A Biochemical Society Focused Meeting on bacteriocins was held at the University of Nottingham on 16-18 July 2012 to mark the retirement of Professor Richard James and honour a scientific career of more than 30 years devoted to an understanding of the biology of colicins, bacteriocins produced by Escherichia coli. This meeting was the third leg of a triumvirate of symposia that included meetings at the Île de Bendor, France, in 1991 and the University of East Anglia, Norwich, U.K., in 1998, focused on bringing together leading experts in basic and applied bacteriocin research. The symposium which attracted 70 attendees consisted of 18 invited speakers and 22 selected oral communications spread over four themes: (i) Role of bacteriocins in bacterial ecology, (ii) Mode of action of bacteriocins, (ii) Mechanisms of bacteriocin import across the cell envelope, and (iv) Biotechnological and biomedical applications of bacteriocins. Speakers and poster presenters travelled from around the world, including the U.S.A., Japan, Asia and Europe, to showcase the latest developments in their scientific research.
Collapse
|