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Gigante AM, Hadis MA, Secker B, Shaw SC, Cooper PR, Palin WM, Milward MR, Atterbury RJ. Exposure to blue light reduces antimicrobial resistant Pseudomonas aeruginosa isolated from dog ear infections. Front Microbiol 2024; 15:1414412. [PMID: 39027093 PMCID: PMC11255781 DOI: 10.3389/fmicb.2024.1414412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 06/14/2024] [Indexed: 07/20/2024] Open
Abstract
Introduction Pseudomonas aeruginosa is a leading cause of canine otitis externa. Enrofloxacin is often applied topically to treat this condition, although recalcitrant and recurring infections are common. There is evidence that exposure to blue light (400-470 nm) has a bactericidal effect on P. aeruginosa and other microorganisms. Methods In the present study, we tested the biocidal effect of blue light (375-450 nm), alone or in combination with enrofloxacin, against six isolates of P. aeruginosa from dogs with otitis externa (5 of which were resistant to enrofloxacin). Results Treatment of planktonic cell cultures with blue light resulted in significant (p < 0.5) reductions in Colony Forming Units (CFU) for all seven strains tested, in some cases below the limit of detection. The greatest bactericidal effect was observed following exposure to light at 405 nm wavelength (p < 0.05). Exposure to blue light for 20 min usually resulted in a greater reduction in Pseudomonas aeruginosa than enrofloxacin treatment, and combination treatment typically resulted in the largest reductions in CFU. Analysis of the genome sequences of these strains established that enrofloxacin resistance was likely the result of a S466F substitution in GyrB. However, there was no clear association between genotype and susceptibility to blue light treatment. Discussion These results suggest that blue light treatment, particularly at 405 nm wavelength, and especially in combination with enrofloxacin therapy, could be an effective treatment for otherwise recalcitrant canine otitis externa caused by Pseudomonas aeruginosa. It may also provide a way of extending the usefulness of enrofloxacin therapy which would otherwise be ineffective as a sole therapeutic agent.
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Affiliation(s)
- Adriano M. Gigante
- School of Veterinary Medicine and Science, University of Nottingham, Leicestershire, United Kingdom
| | - Mohammad A. Hadis
- School of Dentistry, University of Birmingham, Birmingham, United Kingdom
| | - Bailey Secker
- School of Veterinary Medicine and Science, University of Nottingham, Leicestershire, United Kingdom
| | - Stephen C. Shaw
- School of Veterinary Medicine and Science, University of Nottingham, Leicestershire, United Kingdom
| | - Paul R. Cooper
- School of Dentistry, University of Birmingham, Birmingham, United Kingdom
- Department of Oral Sciences, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - William M. Palin
- School of Dentistry, University of Birmingham, Birmingham, United Kingdom
| | - Michael R. Milward
- School of Dentistry, University of Birmingham, Birmingham, United Kingdom
| | - Robert J. Atterbury
- School of Veterinary Medicine and Science, University of Nottingham, Leicestershire, United Kingdom
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2
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Wang Y, Wang X, Liu X, Lin B. Research Progress on Strategies for Improving the Enzyme Properties of Bacteriophage Endolysins. J Microbiol Biotechnol 2024; 34:1189-1196. [PMID: 38693045 PMCID: PMC11239441 DOI: 10.4014/jmb.2312.12050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/06/2024] [Accepted: 02/08/2024] [Indexed: 05/03/2024]
Abstract
Bacterial resistance to commonly used antibiotics is one of the major challenges to be solved today. Bacteriophage endolysins (Lysins) have become a hot research topic as a new class of antibacterial agents. They have promising applications in bacterial infection prevention and control in multiple fields, such as livestock and poultry farming, food safety, clinical medicine and pathogen detection. However, many phage endolysins display low bactericidal activities, short half-life and narrow lytic spectrums. Therefore, some methods have been used to improve the enzyme properties (bactericidal activity, lysis spectrum, stability and targeting the substrate, etc) of bacteriophage endolysins, including deletion or addition of domains, DNA mutagenesis, chimerization of domains, fusion to the membrane-penetrating peptides, fusion with domains targeting outer membrane transport systems, encapsulation, the usage of outer membrane permeabilizers. In this review, research progress on the strategies for improving their enzyme properties are systematically presented, with a view to provide references for the development of lysins with excellent performances.
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Affiliation(s)
- Yulu Wang
- Shunde Women and Children's Hospital, Guangdong Medical University, Foshan 528300, P.R. China
- Dongguan Key Laboratory of Public Health Laboratory Science, School of Public Health, Guangdong Medical University, Dongguan 523808, P.R. China
| | - Xue Wang
- Dongguan Key Laboratory of Public Health Laboratory Science, School of Public Health, Guangdong Medical University, Dongguan 523808, P.R. China
| | - Xin Liu
- Dongguan Key Laboratory of Public Health Laboratory Science, School of Public Health, Guangdong Medical University, Dongguan 523808, P.R. China
| | - Bokun Lin
- Shunde Women and Children's Hospital, Guangdong Medical University, Foshan 528300, P.R. China
- Dongguan Key Laboratory of Public Health Laboratory Science, School of Public Health, Guangdong Medical University, Dongguan 523808, P.R. China
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3
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Khan FM, Rasheed F, Yang Y, Liu B, Zhang R. Endolysins: a new antimicrobial agent against antimicrobial resistance. Strategies and opportunities in overcoming the challenges of endolysins against Gram-negative bacteria. Front Pharmacol 2024; 15:1385261. [PMID: 38831886 PMCID: PMC11144922 DOI: 10.3389/fphar.2024.1385261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 04/16/2024] [Indexed: 06/05/2024] Open
Abstract
Antibiotic-resistant bacteria are rapidly emerging, and the increasing prevalence of multidrug-resistant (MDR) Acinetobacter baumannii poses a severe threat to humans and healthcare organizations, due to the lack of innovative antibacterial drugs. Endolysins, which are peptidoglycan hydrolases encoded by a bacteriophage, are a promising new family of antimicrobials. Endolysins have been demonstrated as an effective therapeutic agent against bacterial infections of A. baumannii and many other Gram-positive and Gram-negative bacteria. Endolysin research has progressed from basic in vitro characterization to sophisticated protein engineering methodologies, including advanced preclinical and clinical testing. Endolysin are therapeutic agent that shows antimicrobial properties against bacterial infections caused by drug-resistant Gram-negative bacteria, there are still barriers to their implementation in clinical settings, such as safety concerns with outer membrane permeabilizers (OMP) use, low efficiency against stationary phase bacteria, and stability issues. The application of protein engineering and formulation techniques to improve enzyme stability, as well as combination therapy with other types of antibacterial drugs to optimize their medicinal value, have been reviewed as well. In this review, we summarize the clinical development of endolysin and its challenges and approaches for bringing endolysin therapies to the clinic. This review also discusses the different applications of endolysins.
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Affiliation(s)
- Fazal Mehmood Khan
- College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, China
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Fazal Rasheed
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China
| | - Yunlan Yang
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Bin Liu
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Rui Zhang
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
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4
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Zhang Y, Wang R, Hu Q, Lv N, Zhang L, Yang Z, Zhou Y, Wang X. Characterization of Pseudomonas aeruginosa bacteriophages and control hemorrhagic pneumonia on a mice model. Front Microbiol 2024; 15:1396774. [PMID: 38808279 PMCID: PMC11132263 DOI: 10.3389/fmicb.2024.1396774] [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: 03/06/2024] [Accepted: 04/12/2024] [Indexed: 05/30/2024] Open
Abstract
Pseudomonas aeruginosa is one of the most common pathogens causing hemorrhagic pneumonia in Chinese forest musk deer. Multidrug-resistant P. aeruginosa is frequently isolated from the lungs of affected musk deer in Shaanxi Province, China. With the increasing bacterial drug resistance, commonly used antibiotics have shown limited efficacy against drug-resistant P. aeruginosa. Therefore, phages have garnered attention as a promising alternative to antibiotics among researchers. In this study, phages vB_PaeP_YL1 and vB_PaeP_YL2 (respectively referred to as YL1 and YL2) were isolated from mixed sewage samples from a farm. YL1 and YL2 exhibit an icosahedral head and a non-contractile short tail, belonging to the Podoviridae family. Identification results demonstrate good tolerance to low temperatures and pH levels, with minimal variation in potency within 30 min of UV irradiation. The MOI for both YL1 and YL2 was 0.1, and their one-step growth curve latent periods were 10 min and 20 min, respectively. Moreover, both single phage and phage cocktail effectively inhibited the growth of the host bacteria in vitro, with the phage cocktail showing superior inhibitory effects compared to the single phage. YL1 and YL2 possess double-stranded DNA genomes, with YL1 having a genome size of 72,187 bp and a total G + C content of 55.02%, while YL2 has a genome size of 72,060 bp and a total G + C content of 54.98%. YL1 and YL2 are predicted to have 93 and 92 open reading frames (ORFs), respectively, and no ORFs related to drug resistance or lysogeny were found in both phages. Genome annotation and phylogenetic analysis revealed that YL1 is closely related to vB_PaeP_FBPa1 (ON857943), while YL2 is closely related to vB_PaeP_FBPa1 (ON857943) and Phage26 (NC041907). In a mouse model of hemorrhagic pneumonia, phage cocktail treatment showed better control of the disease and significantly reduced lung bacterial load compared to single phage treatment. Therefore, YL1 and YL2 have the potential for the prevention and treatment of multidrug-resistant P. aeruginosa infections.
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Affiliation(s)
- Yanjie Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang, China
| | - Ruiqing Wang
- College of Veterinary Medicine, Northwest A&F University, Xianyang, China
| | - Qingxia Hu
- College of Veterinary Medicine, Northwest A&F University, Xianyang, China
| | - Ni Lv
- College of Veterinary Medicine, Northwest A&F University, Xianyang, China
| | - Likun Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang, China
| | - Zengqi Yang
- College of Veterinary Medicine, Northwest A&F University, Xianyang, China
| | - Yefei Zhou
- Nanjing Xiao Zhuang University, Nanjing, China
| | - Xinglong Wang
- College of Veterinary Medicine, Northwest A&F University, Xianyang, China
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Zheng T, Zhang C. Engineering strategies and challenges of endolysin as an antibacterial agent against Gram-negative bacteria. Microb Biotechnol 2024; 17:e14465. [PMID: 38593316 PMCID: PMC11003714 DOI: 10.1111/1751-7915.14465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/09/2024] [Accepted: 03/21/2024] [Indexed: 04/11/2024] Open
Abstract
Bacteriophage endolysin is a novel antibacterial agent that has attracted much attention in the prevention and control of drug-resistant bacteria due to its unique mechanism of hydrolysing peptidoglycans. Although endolysin exhibits excellent bactericidal effects on Gram-positive bacteria, the presence of the outer membrane of Gram-negative bacteria makes it difficult to lyse them extracellularly, thus limiting their application field. To enhance the extracellular activity of endolysin and facilitate its crossing through the outer membrane of Gram-negative bacteria, researchers have adopted physical, chemical, and molecular methods. This review summarizes the characterization of endolysin targeting Gram-negative bacteria, strategies for endolysin modification, and the challenges and future of engineering endolysin against Gram-negative bacteria in clinical applications, to promote the application of endolysin in the prevention and control of Gram-negative bacteria.
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Affiliation(s)
- Tianyu Zheng
- Bathurst Future Agri‐Tech InstituteQingdao Agricultural UniversityQingdaoChina
| | - Can Zhang
- College of Veterinary MedicineQingdao Agricultural UniversityQingdaoChina
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Zhang Q, Zhao Y, Yao Y, Wu N, Chen S, Xu L, Tu Y. Characteristics of hen egg white lysozyme, strategies to break through antibacterial limitation, and its application in food preservation: A review. Food Res Int 2024; 181:114114. [PMID: 38448098 DOI: 10.1016/j.foodres.2024.114114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 02/02/2024] [Accepted: 02/07/2024] [Indexed: 03/08/2024]
Abstract
Hen egg white lysozyme (HEWL) is used as a food additive in China due to its outstanding antibacterial properties. It is listed as GRAS grade (generally recognized as safe) by the United States Food and Drug Administration (FDA, US) and has been extensively researched and used in food preservation. And the industrial production of HEWL already been realized. Given the complex food system that can affect the antibacterial activity of HEWL, and the limitations of HEWL itself on Gram-negative bacteria. Based on the structure and main biological characteristics of HEWL, this paper focuses on reviewing methods to enhance the stability and antibacterial properties of HEWL. Immobilization tactics such as chemically driven self-assembly, embedding and adsorption address the restriction of poor HEWL antibacterial activity effected by external factors. Both intermolecular and intramolecular modification strategies break the bactericidal deficiencies of HEWL itself. It also comprehensively analyzes the current application status and future prospects of HEWL in the food preservation. There was limited research on the biological methods in modifying HEWL. If the HEWL is genetically engineered, it can broaden its antimicrobial spectrum, improve its other biological activities, so as to further expand its application in the food industry. At present, research on HEWL mainly focused on its antibacterial properties, whereas its application in anti-inflammatory and antioxidant effects also presented great potential.
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Affiliation(s)
- Qingqing Zhang
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Nanchang Key Laboratory of Egg Safety Production and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yan Zhao
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Nanchang Key Laboratory of Egg Safety Production and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
| | - Yao Yao
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Nanchang Key Laboratory of Egg Safety Production and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Na Wu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Nanchang Key Laboratory of Egg Safety Production and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shuping Chen
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Nanchang Key Laboratory of Egg Safety Production and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Lilan Xu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Nanchang Key Laboratory of Egg Safety Production and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yonggang Tu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Nanchang Key Laboratory of Egg Safety Production and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
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7
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Sisson HM, Jackson SA, Fagerlund RD, Warring SL, Fineran PC. Gram-negative endolysins: overcoming the outer membrane obstacle. Curr Opin Microbiol 2024; 78:102433. [PMID: 38350268 DOI: 10.1016/j.mib.2024.102433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/10/2024] [Accepted: 01/12/2024] [Indexed: 02/15/2024]
Abstract
Our ability to control the growth of Gram-negative bacterial pathogens is challenged by rising antimicrobial resistance and requires new approaches. Endolysins are phage-derived enzymes that degrade peptidoglycan and therefore offer potential as antimicrobial agents. However, the outer membrane (OM) of Gram-negative bacteria impedes the access of externally applied endolysins to peptidoglycan. This review highlights recent advances in the discovery and characterization of natural endolysins that can breach the OM, as well as chemical and engineering approaches that increase antimicrobial efficacy of endolysins against Gram-negative pathogens.
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Affiliation(s)
- Hazel M Sisson
- Department of Microbiology and Immunology, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Genetics Otago, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Bioprotection Aotearoa, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Simon A Jackson
- Department of Microbiology and Immunology, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Genetics Otago, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Bioprotection Aotearoa, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Robert D Fagerlund
- Department of Microbiology and Immunology, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Genetics Otago, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Bioprotection Aotearoa, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Suzanne L Warring
- Department of Microbiology and Immunology, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Genetics Otago, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Peter C Fineran
- Department of Microbiology and Immunology, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Genetics Otago, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Bioprotection Aotearoa, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
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8
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Sisson HM, Fagerlund RD, Jackson SA, Briers Y, Warring SL, Fineran PC. Antibacterial synergy between a phage endolysin and citric acid against the Gram-negative kiwifruit pathogen Pseudomonas syringae pv. actinidiae. Appl Environ Microbiol 2024; 90:e0184623. [PMID: 38319087 PMCID: PMC10952447 DOI: 10.1128/aem.01846-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 01/04/2024] [Indexed: 02/07/2024] Open
Abstract
Horticultural diseases caused by bacterial pathogens provide an obstacle to crop production globally. Management of the infection of kiwifruit by the Gram-negative phytopathogen Pseudomonas syringae pv. actinidiae (Psa) currently includes copper and antibiotics. However, the emergence of bacterial resistance and a changing regulatory landscape are providing the impetus to develop environmentally sustainable antimicrobials. One potential strategy is the use of bacteriophage endolysins, which degrade peptidoglycan during normal phage replication, causing cell lysis and the release of new viral progeny. Exogenous use of endolysins as antimicrobials is impaired by the outer membrane of Gram-negative bacteria that provides an impermeable barrier and prevents endolysins from accessing their target peptidoglycan. Here, we describe the synergy between citric acid and a phage endolysin, which results in a reduction of viable Psa below detection. We show that citric acid drives the destabilization of the outer membrane via acidification and sequestration of divalent cations from the lipopolysaccharide, which is followed by the degradation of the peptidoglycan by the endolysin. Scanning electron microscopy revealed clear morphological differences, indicating cell lysis following the endolysin-citric acid treatment. These results show the potential for citric acid-endolysin combinations as a possible antimicrobial approach in agricultural applications. IMPORTANCE The phytopathogen Pseudomonas syringae pv. actinidiae (Psa) causes major impacts to kiwifruit horticulture, and the current control strategies are heavily reliant on copper and antibiotics. The environmental impact and increasing resistance to these agrichemicals are driving interest in alternative antimicrobials including bacteriophage-derived therapies. In this study, we characterize the endolysin from the Otagovirus Psa374 which infects Psa. When combined with citric acid, this endolysin displays an impressive antibacterial synergy to reduce viable Psa below the limit of detection. The use of citric acid as a synergistic agent with endolysins has not been extensively studied and has never been evaluated against a plant pathogen. We determined that the synergy involved a combination of the chelation activity of citric acid, acidic pH, and the specific activity of the ΦPsa374 endolysin. Our study highlights an exciting opportunity for alternative antimicrobials in agriculture.
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Affiliation(s)
- Hazel M. Sisson
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
- Bioprotection Aotearoa, University of Otago, Dunedin, New Zealand
| | - Robert D. Fagerlund
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
- Bioprotection Aotearoa, University of Otago, Dunedin, New Zealand
- Genetics Otago, University of Otago, Dunedin, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, Dunedin, New Zealand
| | - Simon A. Jackson
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
- Bioprotection Aotearoa, University of Otago, Dunedin, New Zealand
- Genetics Otago, University of Otago, Dunedin, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, Dunedin, New Zealand
| | - Yves Briers
- Laboratory of Applied Biotechnology, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Suzanne L. Warring
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Peter C. Fineran
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
- Bioprotection Aotearoa, University of Otago, Dunedin, New Zealand
- Genetics Otago, University of Otago, Dunedin, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, Dunedin, New Zealand
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Gonçalves T, Marques AT, Manageiro V, Tanoeiro L, Vital JS, Duarte A, Vítor JMB, Caniça M, Gaspar MM, Vale FF. Antimicrobial activity of prophage endolysins against critical Enterobacteriaceae antibiotic-resistant bacteria. Int J Pharm 2024; 651:123758. [PMID: 38160991 DOI: 10.1016/j.ijpharm.2023.123758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/21/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
Enterobacteriaceae species are part of the 2017 World Health Organization antibiotic-resistant priority pathogens list for development of novel medicines. Multidrug-resistant Klebsiella pneumoniae is an increasing threat to public health and has become a relevant human pathogen involved in life-threatening infections. Phage therapy involves the use of phages or their lytic endolysins as bioagents for the treatment of bacterial infectious diseases. Gram-negative bacteria have an outer membrane, making difficult the access of endolysins to the peptidoglycan. Here, three endolysins from prophages infecting three distinct Enterobacterales species, Kp2948-Lys from K. pneumoniae, Ps3418-Lys from Providencia stuartii, and Kaer26608-Lys from Klebsiella aerogenes, were purified and exhibited antibacterial activity against their specific bacterium species verified by zymogram assays. These three endolysins were successfully associated to liposomes composed of dimyristoyl phosphatidyl choline (DMPC), dioleoyl phosphatidyl ethanolamine (DOPE) and cholesteryl hemisuccinate (CHEMS) at a molar ratio (4:4:2), with an encapsulation efficiency ranging from 24 to 27%. Endolysins encapsulated in liposomes resulted in higher antibacterial activity compared to the respective endolysin in the free form, suggesting that the liposome-mediated delivery system enhances fusion with outer membrane and delivery of endolysins to the target peptidoglycan. Obtained results suggest that Kp2948-Lys appears to be specific for K. pneumoniae, while Ps3418-Lys and Kaer26608-Lys appear to have a broader antibacterial spectrum. Endolysins incorporated in liposomes constitute a promising weapon, applicable in the several dimensions (human, animals and environment) of the One Health approach, against multidrug-resistant Enterobacteriaceae.
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Affiliation(s)
- Tiago Gonçalves
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal; Advanced Technologies for Drug Delivery, Research Institute for Medicines (iMed-ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Andreia T Marques
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Vera Manageiro
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal; Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, Porto, Portugal; AL4AnimalS, Associate Laboratory for Animal and Veterinary Sciences, Portugal
| | - Luis Tanoeiro
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Joana S Vital
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Aida Duarte
- Faculty of Pharmacy, Universidade de Lisboa, Av. Gama Pinto, 1649-003 Lisboa, Portugal; Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Superior Egas Moniz, Quinta da Granja, 2829-511 Monte da Caparica, Portugal
| | - Jorge M B Vítor
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal; Faculty of Pharmacy, Universidade de Lisboa, Av. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Manuela Caniça
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal; Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, Porto, Portugal; AL4AnimalS, Associate Laboratory for Animal and Veterinary Sciences, Portugal; CIISA, Center for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
| | - Maria Manuela Gaspar
- Advanced Technologies for Drug Delivery, Research Institute for Medicines (iMed-ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Filipa F Vale
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal; BioISI - Instituto de Biosistemas e Ciências Integrativas, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
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10
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Li P, Shen M, Ma W, Zhou X, Shen J. LysZX4-NCA, a new endolysin with broad-spectrum antibacterial activity for topical treatment. Virus Res 2024; 340:199296. [PMID: 38065302 PMCID: PMC10755502 DOI: 10.1016/j.virusres.2023.199296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 12/02/2023] [Accepted: 12/05/2023] [Indexed: 01/01/2024]
Abstract
The prevalence of multidrug-resistant highly virulent Klebsiella pneumoniae (MDR-hvKP) requires the development of new therapeutic agents. Herein, a novel lytic phage vB_KpnS_ZX4 against MDR-hvKP was discovered in hospital sewage. Phage vB_KpnS_ZX4 had a short latent period (5 min) and a large burst size (230 PFU/cell). It can rapidly reduce the number of bacteria in vitro and improve survival rates of bacteremic mice in vivo from 0 to 80 % with a single injection of 108 PFU. LysZX4, an endolysin derived from vB_KpnS_ZX4, exhibits potent antimicrobial activity in vitro in combination with ethylenediaminetetraacetic acid (EDTA). The antimicrobial activity of LysZX4 was further enhanced by the fusion of KWKLFKI residues from cecropin A (LysZX4-NCA). In vitro antibacterial experiments showed that LysZX4-NCA exerts broad-spectrum antibacterial activity against clinical Gram-negative bacteria, including MDR-hvKP. Moreover, in the mouse model of MDR-hvKP skin infection, treatment with LysZX4-NCA resulted in a three-log reduction in bacterial burden on the skin compared to the control group. Therefore, the novel phages vB_KpnS_ZX4 and LysZX4-NCA are effective reagents for the treatment of systemic and local MDR-hvKP infections.
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Affiliation(s)
- Ping Li
- College of Veterinary Medicine, Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, PR China
| | - Mangmang Shen
- College of Veterinary Medicine, Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, PR China
| | - Wenjie Ma
- College of Veterinary Medicine, Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, PR China
| | - Xin Zhou
- College of Veterinary Medicine, Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, PR China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, PR China.
| | - Jiayin Shen
- The Third People's Hospital of Shenzhen, Shenzhen 518112, PR China.
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11
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Shah S, Das R, Chavan B, Bajpai U, Hanif S, Ahmed S. Beyond antibiotics: phage-encoded lysins against Gram-negative pathogens. Front Microbiol 2023; 14:1170418. [PMID: 37789862 PMCID: PMC10542408 DOI: 10.3389/fmicb.2023.1170418] [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: 02/20/2023] [Accepted: 08/25/2023] [Indexed: 10/05/2023] Open
Abstract
Antibiotics remain the frontline agents for treating deadly bacterial pathogens. However, the indiscriminate use of these valuable agents has led to an alarming rise in AMR. The antibiotic pipeline is insufficient to tackle the AMR threat, especially with respect to the WHO critical category of priority Gram-negative pathogens, which have become a serious problem as nosocomial and community infections and pose a threat globally. The AMR pandemic requires solutions that provide novel antibacterial agents that are not only effective but against which bacteria are less likely to gain resistance. In this regard, natural or engineered phage-encoded lysins (enzybiotics) armed with numerous features represent an attractive alternative to the currently available antibiotics. Several lysins have exhibited promising efficacy and safety against Gram-positive pathogens, with some in late stages of clinical development and some commercially available. However, in the case of Gram-negative bacteria, the outer membrane acts as a formidable barrier; hence, lysins are often used in combination with OMPs or engineered to overcome the outer membrane barrier. In this review, we have briefly explained AMR and the initiatives taken by different organizations globally to tackle the AMR threat at different levels. We bring forth the promising potential and challenges of lysins, focusing on the WHO critical category of priority Gram-negative bacteria and lysins under investigation for these pathogens, along with the challenges associated with developing them as therapeutics within the existing regulatory framework.
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Affiliation(s)
- Sanket Shah
- Techinvention Lifecare Private Limited, Mumbai, India
| | - Ritam Das
- Techinvention Lifecare Private Limited, Mumbai, India
| | - Bhakti Chavan
- Techinvention Lifecare Private Limited, Mumbai, India
| | - Urmi Bajpai
- Department of Biomedical Science, Acharya Narendra Dev College, University of Delhi, New Delhi, India
| | - Sarmad Hanif
- Techinvention Lifecare Private Limited, Mumbai, India
| | - Syed Ahmed
- Techinvention Lifecare Private Limited, Mumbai, India
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12
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Zermeño-Cervantes LA, Martínez-Díaz SF, Venancio-Landeros AA, Cardona-Félix CS. Evaluating the efficacy of endolysins and membrane permeabilizers against Vibrio parahaemolyticus in marine conditions. Res Microbiol 2023; 174:104104. [PMID: 37422006 DOI: 10.1016/j.resmic.2023.104104] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 05/31/2023] [Accepted: 06/29/2023] [Indexed: 07/10/2023]
Abstract
Endolysins have garnered significant attention as a potential alternative to antibiotics in aquaculture, mainly for combating Vibrio spp., Gram-negative pathogens responsible for infectious outbreaks. However, endolysin effectiveness against Gram-negative bacteria is limited due to the outer membrane's poor permeability. The combat against marine pathogens poses an additional challenge of finding endolysins that retain their activity in high ionic strength conditions. Thus, this study aimed to demonstrate that certain endolysins retain muralytic activity in seawater and also evaluated outer membrane permeabilizers as endolysin adjuvants. The effectiveness of KZ144 and LysPA26 endolysins, along with EDTA and oregano essential oil, was evaluated against Vibrio parahaemolyticus ATCC-17802 in natural seawater. Results revealed the muralytic activity of both endolysins in seawater. However, the endolysins appeared to counteract the permeabilizers' effect during the initial bactericidal assays. Further investigations revealed that the observed effect was not antagonistic. After the permeabilizer action, V. parahaemolyticus likely used endolysins as a growth substrate. Endolysins may not play an indifferent role if they fail to exert a bactericidal effect. Instead, they can serve as a substrate for fast-growing bacteria, such as V. parahaemolyticus, increasing bacterial density. It should be considered a potential drawback of endolysins' proteinaceous nature as bactericidal agents.
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Affiliation(s)
- Lina Angélica Zermeño-Cervantes
- Instituto Politécnico Nacional-CICIMAR, Av. Instituto Politécnico Nacional S/N, Col. Playa Palo de Santa Rita, La Paz, B. C. S., CP. 23096, México.
| | - Sergio Francisco Martínez-Díaz
- Instituto Politécnico Nacional-CICIMAR, Av. Instituto Politécnico Nacional S/N, Col. Playa Palo de Santa Rita, La Paz, B. C. S., CP. 23096, México.
| | - Alberto Antony Venancio-Landeros
- Instituto Politécnico Nacional-CICIMAR, Av. Instituto Politécnico Nacional S/N, Col. Playa Palo de Santa Rita, La Paz, B. C. S., CP. 23096, México.
| | - César Salvador Cardona-Félix
- CONACyT-Instituto Politécnico Nacional-CICIMAR, Av. Instituto Politécnico Nacional S/N, Col. Playa Palo de Santa Rita, La Paz, B. C. S., CP. 23096, México.
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13
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Loganathan K, Viswanathan B. Genome editing for phage design and uses for therapeutic applications. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2023; 201:203-224. [PMID: 37770172 DOI: 10.1016/bs.pmbts.2023.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
The over usage of antibiotics leads to antibiotic abuse which in turn eventually raises resistance mechanisms among wide range of pathogens. Due to lack of experimental data of efficacy of phages as potential antimicrobial and therapeutic agent and also more specific and cumbersome isolation process against specific pathogens makes it not so feasible technology to be looked as an alternative therapy. But, recent developments in genome editing techniques enables programmed nuclease enzymes that has effectively improvised our methodology to make accurate changes in the genomes of prokaryote as well as eukaryote cells. It is already strengthening our ability to improvise genetic engineering to disease identification by facilitating the creation of more precise models to identify the root cause. The present chapter discusses on improvisation of phage therapy using recent genome editing tools and also shares data on the methods of usage of phages and their derivatives like proteins and enzymes such as lysins and depolymerases, as a potential therapeutic or prophylaxis agent. Methods involved in recombinant based techniques were also discussed in this chapter. Combination of traditional approach with modern tools has led to a potential development of phage-based therapeutics in near future.
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14
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Chen K, Guan Y, Hu R, Cui X, Liu Q. Characterization of the LysP2110-HolP2110 Lysis System in Ralstonia solanacearum Phage P2110. Int J Mol Sci 2023; 24:10375. [PMID: 37373522 DOI: 10.3390/ijms241210375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/14/2023] [Accepted: 06/18/2023] [Indexed: 06/29/2023] Open
Abstract
Ralstonia solanacearum, a pathogen causing widespread bacterial wilt disease in numerous crops, currently lacks an optimal control agent. Given the limitations of traditional chemical control methods, including the risk of engendering drug-resistant strains and environmental harm, there is a dire need for sustainable alternatives. One alternative is lysin proteins that selectively lyse bacteria without contributing to resistance development. This work explored the biocontrol potential of the LysP2110-HolP2110 system of Ralstonia solanacearum phage P2110. Bioinformatics analyses pinpointed this system as the primary phage-mediated host cell lysis mechanism. Our data suggest that LysP2110, a member of the Muraidase superfamily, requires HolP2110 for efficient bacterial lysis, presumably via translocation across the bacterial membrane. LysP2110 also exhibits broad-spectrum antibacterial activity in the presence of the outer membrane permeabilizer EDTA. Additionally, we identified HolP2110 as a distinct holin structure unique to the Ralstonia phages, underscoring its crucial role in controlling bacterial lysis through its effect on bacterial ATP levels. These findings provide valuable insights into the function of the LysP2110-HolP2110 lysis system and establish LysP2110 as a promising antimicrobial agent for biocontrol applications. This study underpins the potential of these findings in developing effective and environment-friendly biocontrol strategies against bacterial wilt and other crop diseases.
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Affiliation(s)
- Kaihong Chen
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Yanhui Guan
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Ronghua Hu
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Xiaodong Cui
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
| | - Qiongguang Liu
- College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
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15
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Stojowska-Swędrzyńska K, Kuczyńska-Wiśnik D, Laskowska E. New Strategies to Kill Metabolically-Dormant Cells Directly Bypassing the Need for Active Cellular Processes. Antibiotics (Basel) 2023; 12:1044. [PMID: 37370363 DOI: 10.3390/antibiotics12061044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/09/2023] [Accepted: 06/11/2023] [Indexed: 06/29/2023] Open
Abstract
Antibiotic therapy failure is often caused by the presence of persister cells, which are metabolically-dormant bacteria capable of surviving exposure to antimicrobials. Under favorable conditions, persisters can resume growth leading to recurrent infections. Moreover, several studies have indicated that persisters may promote the evolution of antimicrobial resistance and facilitate the selection of specific resistant mutants; therefore, in light of the increasing numbers of multidrug-resistant infections worldwide, developing efficient strategies against dormant cells is of paramount importance. In this review, we present and discuss the efficacy of various agents whose antimicrobial activity is independent of the metabolic status of the bacteria as they target cell envelope structures. Since the biofilm-environment is favorable for the formation of dormant subpopulations, anti-persister strategies should also include agents that destroy the biofilm matrix or inhibit biofilm development. This article reviews examples of selected cell wall hydrolases, polysaccharide depolymerases and antimicrobial peptides. Their combination with standard antibiotics seems to be the most promising approach in combating persistent infections.
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Affiliation(s)
- Karolina Stojowska-Swędrzyńska
- Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Dorota Kuczyńska-Wiśnik
- Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Ewa Laskowska
- Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
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16
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Euler CW, Raz A, Hernandez A, Serrano A, Xu S, Andersson M, Zou G, Zhang Y, Fischetti VA, Li J. PlyKp104, a Novel Phage Lysin for the Treatment of Klebsiella pneumoniae, Pseudomonas aeruginosa, and Other Gram-Negative ESKAPE Pathogens. Antimicrob Agents Chemother 2023; 67:e0151922. [PMID: 37098944 PMCID: PMC10190635 DOI: 10.1128/aac.01519-22] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 03/30/2023] [Indexed: 04/27/2023] Open
Abstract
Klebsiella pneumoniae and Pseudomonas aeruginosa are two leading causes of burn and wound infections, pneumonia, urinary tract infections, and more severe invasive diseases, which are often multidrug resistant (MDR) or extensively drug resistant. Due to this, it is critical to discover alternative antimicrobials, such as bacteriophage lysins, against these pathogens. Unfortunately, most lysins that target Gram-negative bacteria require additional modifications or outer membrane permeabilizing agents to be bactericidal. We identified four putative lysins through bioinformatic analysis of Pseudomonas and Klebsiella phage genomes in the NCBI database and then expressed and tested their intrinsic lytic activity in vitro. The most active lysin, PlyKp104, exhibited >5-log killing against K. pneumoniae, P. aeruginosa, and other Gram-negative representatives of the multidrug-resistant ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, K. pneumonia, Acinetobacter baumannii, P. aeruginosa, and Enterobacter species) without further modification. PlyKp104 displayed rapid killing and high activity over a wide pH range and in high concentrations of salt and urea. Additionally, pulmonary surfactants and low concentrations of human serum did not inhibit PlyKp104 activity in vitro. PlyKp104 also significantly reduced drug-resistant K. pneumoniae >2 logs in a murine skin infection model after one treatment of the wound, suggesting that this lysin could be used as a topical antimicrobial against K. pneumoniae and other MDR Gram-negative infections.
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Affiliation(s)
- Chad W. Euler
- State Key Laboratory of Agricultural Microbiology, College of Biomedicine and Health, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
- Department of Medical Laboratory Sciences, Hunter College, CUNY, New York, New York, USA
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York, USA
| | - Assaf Raz
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
- Department of Medical Laboratory Sciences, Hunter College, CUNY, New York, New York, USA
| | - Anaise Hernandez
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
- Department of Medical Laboratory Sciences, Hunter College, CUNY, New York, New York, USA
| | - Anna Serrano
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
| | - Siyue Xu
- State Key Laboratory of Agricultural Microbiology, College of Biomedicine and Health, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Martin Andersson
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Geng Zou
- State Key Laboratory of Agricultural Microbiology, College of Biomedicine and Health, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yue Zhang
- State Key Laboratory of Agricultural Microbiology, College of Biomedicine and Health, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Vincent A. Fischetti
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
| | - Jinquan Li
- State Key Laboratory of Agricultural Microbiology, College of Biomedicine and Health, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York, USA
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17
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Cui J, Shi X, Wang X, Sun H, Yan Y, Zhao F, Zhang C, Liu W, Zou L, Han L, Pan Q, Ren H. Characterization of a lytic Pseudomonas aeruginosa phage vB_PaeP_ASP23 and functional analysis of its lysin LysASP and holin HolASP. Front Microbiol 2023; 14:1093668. [PMID: 36998407 PMCID: PMC10045481 DOI: 10.3389/fmicb.2023.1093668] [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: 11/09/2022] [Accepted: 02/23/2023] [Indexed: 03/16/2023] Open
Abstract
In this study, we isolated a lytic Pseudomonas aeruginosa phage (vB_PaeP_ASP23) from the sewage of a mink farm, characterized its complete genome and analyzed the function of its putative lysin and holin. Morphological characterization and genome annotation showed that phage ASP23 belonged to the Krylovirinae family genus Phikmvvirus, and it had a latent period of 10 min and a burst size of 140 pfu/infected cell. In minks challenged with P. aeruginosa, phage ASP23 significantly reduced bacterial counts in the liver, lung, and blood. The whole-genome sequencing showed that its genome was a 42,735-bp linear and double-stranded DNA (dsDNA), with a G + C content of 62.15%. Its genome contained 54 predicted open reading frames (ORFs), 25 of which had known functions. The lysin of phage ASP23 (LysASP), in combination with EDTA, showed high lytic activity against P. aeruginosa L64. The holin of phage ASP23 was synthesized by M13 phage display technology, to produce recombinant phages (HolASP). Though HolASP exhibited a narrow lytic spectrum, it was effective against Staphylococcus aureus and Bacillus subtilis. However, these two bacteria were insensitive to LysASP. The findings highlight the potential of phage ASP23 to be used in the development of new antibacterial agents.
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Affiliation(s)
- Jiaqi Cui
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Xiaojie Shi
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Xinwei Wang
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Huzhi Sun
- Qingdao Phagepharm Bio-Tech Co., Ltd., Qingdao, Shandong, China
| | - Yanxin Yan
- Qingdao Phagepharm Bio-Tech Co., Ltd., Qingdao, Shandong, China
| | - Feiyang Zhao
- Qingdao Phagepharm Bio-Tech Co., Ltd., Qingdao, Shandong, China
| | - Can Zhang
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Wenhua Liu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Ling Zou
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Lei Han
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Qiang Pan
- Qingdao Phagepharm Bio-Tech Co., Ltd., Qingdao, Shandong, China
| | - Huiying Ren
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
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18
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Ning H, Zhang J, Zhao Q, Lin H, Wang J. Development of the phage lysin-loaded liposomes as preservatives for live clams. Int J Food Microbiol 2023; 387:110059. [PMID: 36580845 DOI: 10.1016/j.ijfoodmicro.2022.110059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 12/10/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Exogenous applications of phage lysins against Vibrio parahaemolyticus (V. parahaemolyticus) are a challenge due to the gram-negative bacteria outer membrane barrier. This study aimed to improve the antibacterial effect of V. parahaemolyticus phage lysin Lysqdvp001 (Lys), the best-characterized lysin with lytic activity against multiple species of Vibrios, by using liposome delivery. Various kinds of Lys-loaded liposome (Lys-lip) systems were designed and tested. The antibacterial activities of cationic guar gum (CGG) containing liposomes were much higher than the other liposomes, causing >5 log10CFU/mL of reductions of V. parahaemolyticus in buffer and severely damaging the bacterial cell structure. Moreover, some CGG liposome formulations retained high antibacterial effect after both 60-80 °C heat treatments and freeze-drying. Besides, the most stable liposome formulation killed 99 % of V. parahaemolyticus in the seawater with live clams, and its depuration rate against the bacterial contaminated clams also reached 99 %.
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Affiliation(s)
- Houqi Ning
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, PR China
| | - Jing Zhang
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, PR China
| | - Qian Zhao
- School of Stomatology of Qingdao University, No. 308, Ningxia Road, 266003 Qingdao, Shandong Province, PR China
| | - Hong Lin
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, PR China
| | - Jingxue Wang
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, PR China.
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19
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Richard CSM, Dey H, Øyen F, Maqsood M, Blencke HM. Outer Membrane Integrity-Dependent Fluorescence of the Japanese Eel UnaG Protein in Live Escherichia coli Cells. BIOSENSORS 2023; 13:232. [PMID: 36831998 PMCID: PMC9953992 DOI: 10.3390/bios13020232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/28/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Reporter genes are important tools in many biological disciplines. The discovery of novel reporter genes is relatively rare. However, known reporter genes are constantly applied to novel applications. This study reports the performance of the bilirubin-dependent fluorescent protein UnaG from the Japanese eel Anguilla japonicas in live Escherichia coli cells in response to the disruption of outer membrane (OM) integrity at low bilirubin (BR) concentrations. Using the E. coli wild-type strain MC4100, its isogenic OM-deficient mutant strain NR698, and different OM-active compounds, we show that BR uptake and UnaG fluorescence depend on a leaky OM at concentrations of 10 µM BR and below, while fluorescence is mostly OM integrity-independent at concentrations above 50 µM BR. We suggest that these properties of the UnaG-BR couple might be applied as a biosensor as an alternative to the OM integrity assays currently in use.
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20
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Genomic characterization and application of a novel bacteriophage STG2 capable of reducing planktonic and biofilm cells of Salmonella. Int J Food Microbiol 2023; 385:109999. [DOI: 10.1016/j.ijfoodmicro.2022.109999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022]
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21
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Tan Y, Su J, Fu M, Zhang H, Zeng H. Recent Advances in Phage-Based Therapeutics for Multi-Drug Resistant Acinetobacter baumannii. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 10:bioengineering10010035. [PMID: 36671607 PMCID: PMC9855029 DOI: 10.3390/bioengineering10010035] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/10/2022] [Accepted: 12/17/2022] [Indexed: 12/29/2022]
Abstract
Acinetobacter baumannii is an important opportunistic pathogen common in clinical infections. Phage therapy become a hot research field worldwide again after the post-antibiotic era. This review summarizes the important progress of phage treatments for A. baumannii in the last five years, and focus on the new interesting advances including the combination of phage and other substances (like photosensitizer), and the phage encapsulation (by microparticle, hydrogel) in delivery. We also discuss the remaining challenges and promising directions for phage-based therapy of A. baumannii infection in the future, and the innovative combination of materials in this area may be one promising direction.
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22
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Morais D, Tanoeiro L, Marques AT, Gonçalves T, Duarte A, Matos APA, Vital JS, Cruz MEM, Carvalheiro MC, Anes E, Vítor JMB, Gaspar MM, Vale FF. Liposomal Delivery of Newly Identified Prophage Lysins in a Pseudomonas aeruginosa Model. Int J Mol Sci 2022; 23:ijms231710143. [PMID: 36077542 PMCID: PMC9456237 DOI: 10.3390/ijms231710143] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 11/16/2022] Open
Abstract
Pseudomonas aeruginosa is a Gram-negative opportunistic bacterium that presents resistance to several antibiotics, thus, representing a major threat to human and animal health. Phage-derived products, namely lysins, or peptidoglycan-hydrolyzing enzymes, can be an effective weapon against antibiotic-resistant bacteria. Whereas in Gram-positive bacteria, lysis from without is facilitated by the exposed peptidoglycan layer, this is not possible in the outer membrane-protected peptidoglycan of Gram-negative bacteria. Here, we suggest the encapsulation of lysins in liposomes as a delivery system against Gram-negative bacteria, using the model of P. aeruginosa. Bioinformatic analysis allowed for the identification of 38 distinct complete prophages within 66 P. aeruginosa genomes (16 of which newly sequenced) and led to the identification of 19 lysins of diverse sequence and function, 5 of which proceeded to wet lab analysis. The four purifiable lysins showed hydrolytic activity against Gram-positive bacterial lawns and, on zymogram assays, constituted of autoclaved P. aeruginosa cells. Additionally, lysins Pa7 and Pa119 combined with an outer membrane permeabilizer showed activity against P. aeruginosa cells. These two lysins were successfully encapsulated in DPPC:DOPE:CHEMS (molar ratio 4:4:2) liposomes with an average encapsulation efficiency of 33.33% and 32.30%, respectively. The application of the encapsulated lysins to the model P. aeruginosa led to a reduction in cell viability and resulted in cell lysis as observed in MTT cell viability assays and electron microscopy. In sum, we report here that prophages may be important sources of new enzybiotics, with prophage lysins showing high diversity and activity. In addition, these enzybiotics following their incorporation in liposomes were able to potentiate their antibacterial effect against the Gram-negative bacteria P. aeruginosa, used as the model.
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Affiliation(s)
- Diana Morais
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Luís Tanoeiro
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Andreia T. Marques
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Tiago Gonçalves
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
- Advanced Technologies for Drug Delivery, Research Institute for Medicines (iMed-ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Aida Duarte
- Faculty of Pharmacy, Universidade de Lisboa, Av. Gama Pinto, 1649-003 Lisboa, Portugal
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Superior Egas Moniz, Quinta da Granja, 2829-511 Monte da Caparica, Portugal
| | - António Pedro Alves Matos
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Superior Egas Moniz, Quinta da Granja, 2829-511 Monte da Caparica, Portugal
| | - Joana S. Vital
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Maria Eugénia Meirinhos Cruz
- Advanced Technologies for Drug Delivery, Research Institute for Medicines (iMed-ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Manuela Colla Carvalheiro
- Advanced Technologies for Drug Delivery, Research Institute for Medicines (iMed-ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Elsa Anes
- Host-Pathogen Interactions Unit, Research Institute for Medicines (iMed-ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Jorge M. B. Vítor
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
- Faculty of Pharmacy, Universidade de Lisboa, Av. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Maria Manuela Gaspar
- Advanced Technologies for Drug Delivery, Research Institute for Medicines (iMed-ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
- Correspondence: or (M.M.G.); or (F.F.V.)
| | - Filipa F. Vale
- Pathogen Genome Bioinformatics and Computational Biology, Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
- Correspondence: or (M.M.G.); or (F.F.V.)
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Chang RYK, Nang SC, Chan HK, Li J. Novel antimicrobial agents for combating antibiotic-resistant bacteria. Adv Drug Deliv Rev 2022; 187:114378. [PMID: 35671882 DOI: 10.1016/j.addr.2022.114378] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 05/26/2022] [Accepted: 05/26/2022] [Indexed: 12/16/2022]
Abstract
Antibiotic therapy has become increasingly ineffective against bacterial infections due to the rise of resistance. In particular, ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) have caused life-threatening infections in humans and represent a major global health threat due to a high degree of antibiotic resistance. To respond to this urgent call, novel strategies are urgently needed, such as bacteriophages (or phages), phage-encoded enzymes, immunomodulators and monoclonal antibodies. This review critically analyses these promising antimicrobial therapies for the treatment of multidrug-resistant bacterial infections. Recent advances in these novel therapeutic strategies are discussed, focusing on preclinical and clinical investigations, as well as combinatorial approaches. In this 'Bad Bugs, No Drugs' era, novel therapeutic strategies can play a key role in treating deadly infections and help extend the lifetime of antibiotics.
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Rai S, Kumar A. Bacteriophage therapeutics to confront multidrug-resistant Acinetobacter baumannii - a global health menace. ENVIRONMENTAL MICROBIOLOGY REPORTS 2022; 14:347-364. [PMID: 34196126 DOI: 10.1111/1758-2229.12988] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 06/18/2021] [Accepted: 06/23/2021] [Indexed: 06/13/2023]
Abstract
We have already entered the post-antibiotic era as the outbreaks of numerous multidrug-resistant strains in the community as well as hospital-acquired infections are ringing alarm bells in the health sector. Acinetobacter baumannii is one such pathogen that has been considered a worldwide threat as it acquires multidrug resistance. It is one of the most challenging hospital-acquired pathogens as World Health Organization has listed carbapenem-resistant A. baumannii as a critical priority pathogen with limited therapeutic options. There is an urgent need to develop novel strategies against such pathogens to tackle the global crisis. Bacteriophages (phages), especially the lytic ones have re-emerged as a potential therapeutic approach. This review encompasses vast majority of phages against A. baumannii strains with special references related to single phage or monophage therapy, use of phage cocktails, combination therapy with antibiotics, use of phage-derived enzymes like endolysins and depolymerases to combat the pathogen and explore their therapeutic aspects. The concurrent ecological as well as evolutionary interplay between the phages and host bacteria demands in depth-research and knowledge, so as to utilize the maximum potential of the bacteriophage therapy.
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Affiliation(s)
- Sandhya Rai
- Department of Zoology, Deshbandhu College, University of Delhi, New Delhi, 110019, India
| | - Amod Kumar
- Department of Zoology, Kirori Mal College, University of Delhi, New Delhi, 110007, India
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Kim J, Kim JC, Ahn J. Assessment of bacteriophage-encoded endolysin as a potent antimicrobial agent against antibiotic-resistant Salmonella Typhimurium. Microb Pathog 2022; 168:105576. [PMID: 35561980 DOI: 10.1016/j.micpath.2022.105576] [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: 02/17/2022] [Revised: 05/05/2022] [Accepted: 05/08/2022] [Indexed: 11/25/2022]
Abstract
This study was designed to evaluate the potential of using newly purified Salmonella phage-encoded endolysin LysPB32 as novel antibiotic alternative. The endolysin LysPB32 was characterized by analyzing pH and thermal stability, lytic spectrum, antimicrobial activity, and mutant frequency against Salmonella Typhimurium KCCM 40253 (STKCCM), S. Typhimurium ATCC 19585 (STATCC), S. Typhimurium CCARM 8009 (STCCARM), Klebsiella pneumoniae ATCC 23357 (KPATCC), K. pneumoniae CCARM 10237 (KPCCARM), Pseudomonas aeruginosa ATCC 27853 (PAATCC), Listeria monocytogenes ATCC 1911 (LMATCC), Staphylococcus aureus ATCC 25923 (SAATCC), and S. aureus CCARM 3080 (SACCARM). The molecular weight of LysPB32 is 17 kDa that was classified as N-acetyl-β-d-muramidase. The optimum activity of LysPB32 against the outer membrane (OM) permeabilized STKCCM, STATCC, and STCCARM was observed at 37 °C and pH 6.5. LysPB32 had a broad spectrum of muralytic activity against antibiotic-sensitive STKCCM (41 mOD/min), STATCC (32 mOD/min), and SBKACC (25 mOD/min) and antibiotic-resistant STCCARM (35 mOD/min) and KPCCARM (31 mOD/min). The minimum inhibitory concentrations (MICs) of polymyxin B against STKCCM, STCCARM, and STATCC were decreased by 4-, 4-, and 8-folds, respectively, when treated with LysPB32. The combination of LysPB32 and polymyxin B effectively inhibited the growth of STKCCM, STCCARM, and STATCC after 24 h of incubation at 37 °C, showing 4.9-, 4.4-, and 3.3-log reductions, respectively. The mutant frequency was low in STKCCM, STCCARM, and STATCC treated with combination of LysPB32-polymyxin B system. The results suggest the LysPB32-polymyxin system can be a potential candidate for alternative therapeutic agent to control antibiotic-resistant pathogens.
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Affiliation(s)
- Junhwan Kim
- Department of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Jin-Chul Kim
- Department of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Juhee Ahn
- Department of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea.
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Schuch R, Cassino C, Vila-Farres X. Direct Lytic Agents: Novel, Rapidly Acting Potential Antimicrobial Treatment Modalities for Systemic Use in the Era of Rising Antibiotic Resistance. Front Microbiol 2022; 13:841905. [PMID: 35308352 PMCID: PMC8928733 DOI: 10.3389/fmicb.2022.841905] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 01/28/2022] [Indexed: 12/19/2022] Open
Abstract
Direct lytic agents (DLAs) are novel antimicrobial compounds with unique mechanisms of action based on rapid cell wall destabilization and bacteriolysis. DLAs include two classes of purified polypeptides—lysins (peptidoglycan hydrolase enzymes) and amurins (outer membrane targeting peptides). Their intended use is to kill bacteria in a manner that is complimentary to and synergistic with traditional antibiotics without selection for DLA resistance. Lysins were originally described as having activity against Gram-positive pathogens and of those, exebacase, is the first to have advanced into Phase 3 of clinical development. Recently, both engineered and native DLAs have now been described with potent bactericidal activity against a range of Gram-negative pathogens, including multidrug-resistant (MDR) and extensively drug-resistant (XDR) Pseudomonas aeruginosa, Klebsiella pneumoniae, and Acinetobacter baumannii. Importantly, novel DLAs targeting Gram-negatives, including the lysin CF-370 and the amurin peptides, are active in biological matrices (blood/serum) and, as such, offer promise for therapeutic use as systemically administered agents for the treatment of life-threatening invasive infections. In this review, DLAs are discussed as potential new classes of antimicrobial biologics that can be used to treat serious systemic infections.
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Zhang Y, Huang HH, Duc HM, Masuda Y, Honjoh KI, Miyamoto T. Application of endolysin LysSTG2 as a potential biocontrol agent against planktonic and biofilm cells of Pseudomonas on various food and food contact surfaces. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108460] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Li C, Jiang M, Khan FM, Zhao X, Wang G, Zhou W, Li J, Yu J, Li Y, Wei H, Yang H. Intrinsic Antimicrobial Peptide Facilitates a New Broad-Spectrum Lysin LysP53 to Kill Acinetobacter baumannii In Vitro and in a Mouse Burn Infection Model. ACS Infect Dis 2021; 7:3336-3344. [PMID: 34788533 DOI: 10.1021/acsinfecdis.1c00497] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Antimicrobial resistance-related infections of Gram-negative pathogens pose a huge threat to global public health. Lysins, peptidoglycan hydrolases from bacteriophages, are expected as an alternative weapon against drug-resistant bacteria. In the present study, we report a new lysin LysP53 from Acinetobacter baumannii phage 53. Bioinformatic analysis revealed that LysP53 contains a positively charged N-terminal region and a putative peptidase catalytic domain. In vitro biochemical experiments showed that LysP53 is active against multiple antibiotic-resistant Gram-negative bacteria, including A. baumannii, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli, with a reduction of 5 logs in viable A. baumannii number after exposure to 100 μg/mL LysP53 for 1 h. Further studies showed that LysP53 contains a functional antimicrobial peptide, i.e., N-terminal 33 aa, with a comparable spectrum of activity to LysP53. In an A. baumannii-associated mouse model of burn infection, a single dose of 14 μg/mouse LysP53 (57.6 μM) showed higher decolonization efficacy than 4 μg/mouse minocycline- (874 μM; p < 0.05) and buffer-treated groups (p <0.001), leading to a bacterial reduction of 3 logs. Our findings collectively establish that LysP53 could be a promising candidate in the treatment of topical infections caused by multiple Gram-negative pathogens.
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Affiliation(s)
- Changchang Li
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengwei Jiang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Fazal Mehmood Khan
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaowei Zhao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine, Ministry of Education, School of Stomatology, Wuhan University, Wuhan 430079, China
| | - Guanhua Wang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wanli Zhou
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junhua Li
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Junping Yu
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuhong Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine, Ministry of Education, School of Stomatology, Wuhan University, Wuhan 430079, China
| | - Hongping Wei
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hang Yang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Danis-Wlodarczyk KM, Wozniak DJ, Abedon ST. Treating Bacterial Infections with Bacteriophage-Based Enzybiotics: In Vitro, In Vivo and Clinical Application. Antibiotics (Basel) 2021; 10:1497. [PMID: 34943709 PMCID: PMC8698926 DOI: 10.3390/antibiotics10121497] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/23/2021] [Accepted: 11/29/2021] [Indexed: 12/14/2022] Open
Abstract
Over the past few decades, we have witnessed a surge around the world in the emergence of antibiotic-resistant bacteria. This global health threat arose mainly due to the overuse and misuse of antibiotics as well as a relative lack of new drug classes in development pipelines. Innovative antibacterial therapeutics and strategies are, therefore, in grave need. For the last twenty years, antimicrobial enzymes encoded by bacteriophages, viruses that can lyse and kill bacteria, have gained tremendous interest. There are two classes of these phage-derived enzymes, referred to also as enzybiotics: peptidoglycan hydrolases (lysins), which degrade the bacterial peptidoglycan layer, and polysaccharide depolymerases, which target extracellular or surface polysaccharides, i.e., bacterial capsules, slime layers, biofilm matrix, or lipopolysaccharides. Their features include distinctive modes of action, high efficiency, pathogen specificity, diversity in structure and activity, low possibility of bacterial resistance development, and no observed cross-resistance with currently used antibiotics. Additionally, and unlike antibiotics, enzybiotics can target metabolically inactive persister cells. These phage-derived enzymes have been tested in various animal models to combat both Gram-positive and Gram-negative bacteria, and in recent years peptidoglycan hydrolases have entered clinical trials. Here, we review the testing and clinical use of these enzymes.
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Affiliation(s)
| | - Daniel J. Wozniak
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA;
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA;
| | - Stephen T. Abedon
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA;
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Are Bordetella bronchiseptica Siphoviruses (Genus Vojvodinavirus) Appropriate for Phage Therapy-Bacterial Allies or Foes? Viruses 2021; 13:v13091732. [PMID: 34578315 PMCID: PMC8471281 DOI: 10.3390/v13091732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/31/2022] Open
Abstract
Bordetella bronchiseptica is a respiratory animal pathogen that shows growing resistance to commonly used antibiotics, which has necessitated the examination of new antimicrobials, including bacteriophages. In this study, we examined the previously isolated and partially characterized B. bronchiseptica siphoviruses of the genus Vojvodinavirus (LK3, CN1, CN2, FP1 and MW2) for their ability to inhibit bacterial growth and biofilm, and we examined other therapeutically important properties through genomic analysis and lysogeny experiments. The phages inhibited bacterial growth at a low multiplicity of infection (MOI = 0.001) of up to 85% and at MOI = 1 for >99%. Similarly, depending on the phages and MOIs, biofilm formation inhibition ranged from 65 to 95%. The removal of biofilm by the phages was less efficient but still considerably high (40–75%). Complete genomic sequencing of Bordetella phage LK3 (59,831 bp; G + C 64.01%; 79 ORFs) showed integrase and repressor protein presence, indicating phage potential to lysogenize bacteria. Lysogeny experiments confirmed the presence of phage DNA in bacterial DNA upon infection using PCR, which showed that the LK3 phage forms more or less stable lysogens depending on the bacterial host. Bacterial infection with the LK3 phage enhanced biofilm production, sheep blood hemolysis, flagellar motility, and beta-lactam resistance. The examined phages showed considerable anti-B. bronchiseptica activity, but they are inappropriate for therapy because of their temperate nature and lysogenic conversion of the host bacterium.
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Let-7b-5p in vesicles secreted by human airway cells reduces biofilm formation and increases antibiotic sensitivity of P. aeruginosa. Proc Natl Acad Sci U S A 2021; 118:2105370118. [PMID: 34260396 DOI: 10.1073/pnas.2105370118] [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] [Indexed: 12/14/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that forms antibiotic-resistant biofilms, which facilitate chronic infections in immunocompromised hosts. We have previously shown that P. aeruginosa secretes outer-membrane vesicles that deliver a small RNA to human airway epithelial cells (AECs), in which it suppresses the innate immune response. Here, we demonstrate that interdomain communication through small RNA-containing membrane vesicles is bidirectional and that microRNAs (miRNAs) in extracellular vesicles (EVs) secreted by human AECs regulate protein expression, antibiotic sensitivity, and biofilm formation by P. aeruginosa Specifically, human EVs deliver miRNA let-7b-5p to P. aeruginosa, which systematically decreases the abundance of proteins essential for biofilm formation, including PpkA and ClpV1-3, and increases the ability of beta-lactam antibiotics to reduce biofilm formation by targeting the beta-lactamase AmpC. Let-7b-5p is bioinformatically predicted to target not only PpkA, ClpV1, and AmpC in P. aeruginosa but also the corresponding orthologs in Burkholderia cenocepacia, another notorious opportunistic lung pathogen, suggesting that the ability of let-7b-5p to reduce biofilm formation and increase beta-lactam sensitivity is not limited to P. aeruginosa Here, we provide direct evidence for transfer of miRNAs in EVs secreted by eukaryotic cells to a prokaryote, resulting in subsequent phenotypic alterations in the prokaryote as a result of this interdomain communication. Since let-7-family miRNAs are in clinical trials to reduce inflammation and because chronic P. aeruginosa lung infections are associated with a hyperinflammatory state, treatment with let-7b-5p and a beta-lactam antibiotic in nanoparticles or EVs may benefit patients with antibiotic-resistant P. aeruginosa infections.
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Pompilio A, Scribano D, Sarshar M, Di Bonaventura G, Palamara AT, Ambrosi C. Gram-Negative Bacteria Holding Together in a Biofilm: The Acinetobacter baumannii Way. Microorganisms 2021; 9:microorganisms9071353. [PMID: 34206680 PMCID: PMC8304980 DOI: 10.3390/microorganisms9071353] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/14/2021] [Accepted: 06/18/2021] [Indexed: 12/24/2022] Open
Abstract
Bacterial biofilms are a serious public-health problem worldwide. In recent years, the rates of antibiotic-resistant Gram-negative bacteria associated with biofilm-forming activity have increased worrisomely, particularly among healthcare-associated pathogens. Acinetobacter baumannii is a critically opportunistic pathogen, due to the high rates of antibiotic resistant strains causing healthcare-acquired infections (HAIs). The clinical isolates of A. baumannii can form biofilms on both biotic and abiotic surfaces; hospital settings and medical devices are the ideal environments for A. baumannii biofilms, thereby representing the main source of patient infections. However, the paucity of therapeutic options poses major concerns for human health infections caused by A. baumannii strains. The increasing number of multidrug-resistant A. baumannii biofilm-forming isolates in association with the limited number of biofilm-eradicating treatments intensify the need for effective antibiofilm approaches. This review discusses the mechanisms used by this opportunistic pathogen to form biofilms, describes their clinical impact, and summarizes the current and emerging treatment options available, both to prevent their formation and to disrupt preformed A. baumannii biofilms.
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Affiliation(s)
- Arianna Pompilio
- Center for Advanced Studies and Technology (CAST), Department of Medical, Oral and Biotechnological Sciences, Service of Clinical Microbiology, “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy; (A.P.); (G.D.B.)
| | - Daniela Scribano
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185 Rome, Italy;
- Dani Di Giò Foundation-Onlus, 00193 Rome, Italy
| | - Meysam Sarshar
- Research Laboratories, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy;
| | - Giovanni Di Bonaventura
- Center for Advanced Studies and Technology (CAST), Department of Medical, Oral and Biotechnological Sciences, Service of Clinical Microbiology, “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy; (A.P.); (G.D.B.)
| | - Anna Teresa Palamara
- Department of Infectious Diseases, Istituto Superiore di Sanità, 00161 Rome, Italy;
- Laboratory Affiliated to Institute Pasteur Italia-Cenci Bolognetti Foundation, Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185 Rome, Italy
| | - Cecilia Ambrosi
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Open University, IRCCS, 00166 Rome, Italy
- Correspondence:
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Basit A, Qadir S, Qureshi S, Rehman SU. Cloning and expression analysis of fused holin-endolysin from RL bacteriophage; Exhibits broad activity against multi drug resistant pathogens. Enzyme Microb Technol 2021; 149:109846. [PMID: 34311883 DOI: 10.1016/j.enzmictec.2021.109846] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/02/2021] [Accepted: 06/06/2021] [Indexed: 01/20/2023]
Abstract
Antibiotic resistance has become a major risk to community health over last few years because of antibiotics overuse around the globe and lack of new antibiotics development. Phages and their lytic enzymes are considered as an effective alternative of antibiotics to control drug resistant bacterial pathogens. Endolysins prove to be a promising class of antibacterials due to their specificity and less chances of resistance development in bacterial pathogens. Though large number of endolysins has been reported against gram positive bacteria, very few reported against gram negative bacteria due to the presence of outer membrane, which acts as physical barrier against endolysin attack to peptidoglycan. In the current study, we have expressed endolysin (RL_Lys) and holin fused at the N terminus of endolysin (RL_Hlys) from RL phage infecting multi drug resistant (MDR) Pseudomonas aeruginosa. Both endolysin variants were found active against wide range of MDR strains P. aeruginosa, Klebsella pneumonia, Salmonella Sp. and Methicillin Resistant Staphylococcus aureus (MRSA). Broth reduction assay showed that RL_Hlys is more active than RL_Lys due to presence of holin, which assist the endolysin access towards cell wall. The protein ligand docking and molecular dynamic simulation results showed that C- terminus region of endolysin play vital role in cell wall binding and even in the absence of holin, hydrolyze a broad range of gram negative bacterial pathogens. The significant activity of RL-Lys and RL_Hlys against a broad range of MDR gram negative and positive bacterial pathogens makes them good candidates for antibiotic alternatives.
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Affiliation(s)
- Abdul Basit
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, 54590, Pakistan.
| | - Sania Qadir
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, 54590, Pakistan.
| | - Sara Qureshi
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, 54590, Pakistan.
| | - Shafiq Ur Rehman
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, 54590, Pakistan.
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Vázquez R, Blanco-Gañán S, Ruiz S, García P. Mining of Gram-Negative Surface-Active Enzybiotic Candidates by Sequence-Based Calculation of Physicochemical Properties. Front Microbiol 2021; 12:660403. [PMID: 34113327 PMCID: PMC8185167 DOI: 10.3389/fmicb.2021.660403] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/07/2021] [Indexed: 01/21/2023] Open
Abstract
Phage (endo)lysins are nowadays one of the most promising ways out of the current antibiotic resistance crisis. Either as sole therapeutics or as a complement to common antibiotic chemotherapy, lysins are already entering late clinical phases to get regulatory agencies’ authorization. Even the old paradigm of the inability of lysins to attack Gram-negative bacteria from without has already been overcome in a variety of ways: either by engineering approaches or investigating the natural mechanisms by which some wild-type lysins are able to interact with the bacterial surface. Such inherent ability of some lysins has been linked to antimicrobial peptide (AMP)-like regions, which are, on their own, a significant source for novel antimicrobials. Currently, though, many of the efforts for searching novel lysin-based antimicrobial candidates rely on experimental screenings. In this work, we have bioinformatically analyzed the C-terminal end of a collection of lysins from phages infecting the Gram-negative genus Pseudomonas. Through the computation of physicochemical properties, the probability of such regions to be an AMP was estimated by means of a predictive k-nearest neighbors (kNN) model. This way, a subset of putatively membrane-interacting lysins was obtained from the original database. Two of such candidates (named Pae87 and Ppl65) were prospectively tested in terms of muralytic, bacteriolytic, and bactericidal activity. Both of them were found to possess an activity against Pseudomonas aeruginosa and other Gram-negative bacterial pathogens, implying that the prediction of AMP-like regions could be a useful approach toward the mining of phage lysins to design and develop antimicrobials or antimicrobial parts for further engineering.
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Affiliation(s)
- Roberto Vázquez
- Departamento de Biotecnología Microbiana y de Plantas, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain
| | - Sofía Blanco-Gañán
- Departamento de Biotecnología Microbiana y de Plantas, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), Madrid, Spain
| | - Susana Ruiz
- Departamento de Biotecnología Microbiana y de Plantas, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain
| | - Pedro García
- Departamento de Biotecnología Microbiana y de Plantas, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain
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35
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Sunthornthummas S, Doi K, Fujino Y, Rangsiruji A, Sarawaneeyaruk S, Insian K, Pringsulaka O. Genomic characterisation of Lacticaseibacillus paracasei phage ΦT25 and preliminary analysis of its derived endolysin. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2020.104968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Ni P, Wang L, Deng B, Jiu S, Ma C, Zhang C, Almeida A, Wang D, Xu W, Wang S. Characterization of a Lytic Bacteriophage against Pseudomonas syringae pv. actinidiae and Its Endolysin. Viruses 2021; 13:631. [PMID: 33917076 PMCID: PMC8067700 DOI: 10.3390/v13040631] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/14/2021] [Accepted: 03/15/2021] [Indexed: 12/14/2022] Open
Abstract
Pseudomonas syringae pv. actinidiae (Psa) is a phytopathogen that causes canker in kiwifruit. Few conventional control methods are effective against this bacterium. Therefore, alternative approaches, such as phage therapy are warranted. In this study, a lytic bacteriophage (PN09) of Psa was isolated from surface water collected from a river in Hangzhou, China in 2019. Morphologically, PN09 was classified into the Myoviridae family, and could lyse all 29 Psa biovar 3 strains. The optimal temperature and pH ranges for PN09 activity were determined as 25 to 35 ∘C and 6.0 to 9.0, respectively. The complete genome of PN09 was found to be composed of a linear 99,229 bp double-stranded DNA genome with a GC content of 48.16%. The PN09 endolysin (LysPN09) was expressed in vitro and characterized. LysPN09 was predicted to belong to the Muraidase superfamily domain and showed lytic activity against the outer-membrane-permeabilized Psa strains. The lytic activity of LysPN09 was optimal over temperature and pH ranges of 25 to 40 ∘C and 6.0 to 8.0, respectively. When recombinant endolysin LysPN09 was combined with EDTA, Psa strains were effectively damaged. All these characteristics demonstrate that the phage PN09 and its endolysin, LysPN09, are potential candidates for biocontrol of Psa in the kiwifruit industry.
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Affiliation(s)
- Peien Ni
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Lei Wang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Bohan Deng
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Songtao Jiu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Chao Ma
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Caixi Zhang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Adelaide Almeida
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Dapeng Wang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Wenping Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
| | - Shiping Wang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (P.N.); (L.W.); (B.D.); (S.J.); (C.M.); (C.Z.); (D.W.); (S.W.)
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37
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Khan FM, Gondil VS, Li C, Jiang M, Li J, Yu J, Wei H, Yang H. A Novel Acinetobacter baumannii Bacteriophage Endolysin LysAB54 With High Antibacterial Activity Against Multiple Gram-Negative Microbes. Front Cell Infect Microbiol 2021; 11:637313. [PMID: 33738267 PMCID: PMC7960757 DOI: 10.3389/fcimb.2021.637313] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/21/2021] [Indexed: 12/14/2022] Open
Abstract
The rapid spread and emergence of multidrug-resistant Acinetobacter baumannii and other pathogenic Gram-negative bacteria spurred scientists and clinicians to look for alternative therapeutic agents to conventional antibiotics. In the present study, an A. baumannii bacteriophage p54 was isolated and characterized. Morphological and genome analysis revealed that bacteriophage p54 belongs to Myoviridae family with a genome size of 165,813 bps. A novel endolysin, namely LysAB54, showing low similarity with other well-known related endolysins, was cloned, expressed, and characterized from the bacteriophage p54. LysAB54 showed significant bactericidal activity against multidrug-resistant A. baumannii and other Gram-negative bacteria, including Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli, in the absence of outer membrane permeabilizers. Based on all those observations, LysAB54 could represent a potential agent for the treatment of multidrug-resistant Gram-negative superbugs.
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Affiliation(s)
- Fazal Mehmood Khan
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Vijay Singh Gondil
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Changchang Li
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Mengwei Jiang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Junhua Li
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Junping Yu
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Hongping Wei
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Hang Yang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
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38
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Synergistic effects of endolysin Lysqdvp001 and ε-poly-lysine in controlling Vibrio parahaemolyticus and its biofilms. Int J Food Microbiol 2021; 343:109112. [PMID: 33640572 DOI: 10.1016/j.ijfoodmicro.2021.109112] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/29/2021] [Accepted: 02/10/2021] [Indexed: 11/23/2022]
Abstract
The synergistic antibacterial effects between endolysin Lysqdvp001 and ε-poly-lysine (ε-PL) against Vibrio parahaemolyticus (V. parahaemolyticus) were investigated in this study. Lysqdvp001 combined with ε-PL exhibited a strong antibacterial synergism against V. parahaemolyticus. The combinations of Lysqdvp001 (≥60 U/mL) and ε-PL (≥0.2 mg/mL) dramatically decreased cell density of the bacterial suspensions at both 25 °C and 37 °C. Surface zeta potential increment and membrane hyperpolarization of V. parahaemolyticus were observed after treatment by ε-PL and its combination with Lysqdvp001. More β-lactamase and β-galactosidase were leaked from V. parahaemolyticus with combined treatment of Lysqdvp001 and ε-PL than from the bacteria treated with single Lysqdvp001 or ε-PL. Fluorescence and transmission electron microscope revealed that Lysqdvp001 and ε-PL synergistically induced the damage and morphological destruction of V. parahaemolyticus cells. When applying in Gadus macrocephalus, Penaeus orientalis and oyster, the two antimicrobials' cocktail allowed for 3.75, 4.16 and 2.50 log10CFU/g reductions of V. parahaemolyticus, respectively. Besides, Lysqdvp001 in combination with ε-PL removed approximately 44%-68% of V. parahaemolyticus biofilms on polystyrene, glass and stainless steel surfaces. These results demonstrated that Lysqdvp001 and ε-PL might be used together for controlling V. parahaemolyticus and the bacterial biofilms in food industry.
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39
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Krylov V, Bourkaltseva M, Pleteneva E, Shaburova O, Krylov S, Karaulov A, Zhavoronok S, Svitich O, Zverev V. Phage phiKZ-The First of Giants. Viruses 2021; 13:149. [PMID: 33498475 PMCID: PMC7909554 DOI: 10.3390/v13020149] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 01/13/2023] Open
Abstract
The paper covers the history of the discovery and description of phiKZ, the first known giant bacteriophage active on Pseudomonas aeruginosa. It also describes its unique features, especially the characteristic manner of DNA packing in the head around a cylinder-shaped structure ("inner body"), which probably governs an ordered and tight packaging of the phage genome. Important properties of phiKZ-like phages include a wide range of lytic activity and the blue opalescence of their negative colonies, and provide a background for the search and discovery of new P. aeruginosa giant phages. The importance of the phiKZ species and of other giant phage species in practical phage therapy is noted given their broad use in commercial phage preparations.
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Affiliation(s)
- Victor Krylov
- I.I. Mechnikov Research Institute of Vaccines & Sera, 105064 Moscow, Russia; (M.B.); (E.P.); (O.S.); (S.K.); (O.S.); (V.Z.)
| | - Maria Bourkaltseva
- I.I. Mechnikov Research Institute of Vaccines & Sera, 105064 Moscow, Russia; (M.B.); (E.P.); (O.S.); (S.K.); (O.S.); (V.Z.)
| | - Elena Pleteneva
- I.I. Mechnikov Research Institute of Vaccines & Sera, 105064 Moscow, Russia; (M.B.); (E.P.); (O.S.); (S.K.); (O.S.); (V.Z.)
| | - Olga Shaburova
- I.I. Mechnikov Research Institute of Vaccines & Sera, 105064 Moscow, Russia; (M.B.); (E.P.); (O.S.); (S.K.); (O.S.); (V.Z.)
| | - Sergey Krylov
- I.I. Mechnikov Research Institute of Vaccines & Sera, 105064 Moscow, Russia; (M.B.); (E.P.); (O.S.); (S.K.); (O.S.); (V.Z.)
| | - Alexander Karaulov
- Department of Clinical Immunology and Allergy, I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, 119146 Moscow, Russia;
| | - Sergey Zhavoronok
- Department of Infectious Diseases, Belarusian State Medical University, 220116 Minsk, Belarus;
| | - Oxana Svitich
- I.I. Mechnikov Research Institute of Vaccines & Sera, 105064 Moscow, Russia; (M.B.); (E.P.); (O.S.); (S.K.); (O.S.); (V.Z.)
- Faculty of Preventive Medicine, I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, 119146 Moscow, Russia
| | - Vitaly Zverev
- I.I. Mechnikov Research Institute of Vaccines & Sera, 105064 Moscow, Russia; (M.B.); (E.P.); (O.S.); (S.K.); (O.S.); (V.Z.)
- Faculty of Preventive Medicine, I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, 119146 Moscow, Russia
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40
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Mondal SI, Draper LA, Ross RP, Hill C. Bacteriophage endolysins as a potential weapon to combat Clostridioides difficile infection. Gut Microbes 2020; 12:1813533. [PMID: 32985336 PMCID: PMC7524323 DOI: 10.1080/19490976.2020.1813533] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Clostridioides difficile is the leading cause of health-care-associated infection throughout the developed world and contributes significantly to patient morbidity and mortality. Typically, antibiotics are used for the primary treatment of C. difficile infections (CDIs), but they are not universally effective for all ribotypes and can result in antibiotic resistance and recurrent infection, while also disrupting the microbiota. Novel targeted therapeutics are urgently needed to combat CDI. Bacteriophage-derived endolysins are required to disrupt the bacterial cell wall of their target bacteria and are possible alternatives to antibiotics. These lytic proteins could potentially replace or augment antibiotics in CDI treatment. We discuss candidate therapeutic lysins derived from phages/prophages of C. difficile and their potential as antimicrobials against CDI. Additionally, we review the antibacterial potential of some recently identified homologues of C. difficile endolysins. Finally, the challenges of endolysins are considered with respect to the development of novel lysin-based therapies.
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Affiliation(s)
- Shakhinur Islam Mondal
- APC Microbiome Ireland, University College Cork, Cork, Ireland,Genetic Engineering and Biotechnology Department, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Lorraine A. Draper
- APC Microbiome Ireland, University College Cork, Cork, Ireland,School of Microbiology, University College Cork, Cork, Ireland
| | - R Paul Ross
- APC Microbiome Ireland, University College Cork, Cork, Ireland,School of Microbiology, University College Cork, Cork, Ireland,Teagasc Food Research Centre, Moorepark, Cork, Ireland
| | - Colin Hill
- APC Microbiome Ireland, University College Cork, Cork, Ireland,School of Microbiology, University College Cork, Cork, Ireland,CONTACT Colin Hill APC Microbiome Ireland & School of Microbiology, University College Cork, Cork, Ireland
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41
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Gutiérrez D, Briers Y. Lysins breaking down the walls of Gram-negative bacteria, no longer a no-go. Curr Opin Biotechnol 2020; 68:15-22. [PMID: 33053478 DOI: 10.1016/j.copbio.2020.08.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/25/2020] [Accepted: 08/31/2020] [Indexed: 01/24/2023]
Abstract
Phage lysins are one of the most advanced classes of antibacterials under clinical evaluation and have a new mode of action based on peptidoglycan degradation. Lysins were initially excluded from use against Gram-negative pathogens because of their impermeable outer membrane, but are now increasingly developed as effective antibacterials against these critical priority pathogens. Generally, three routes of investigation have been recently explored and advanced to different extents, including the use of lysins that possess intrinsic activity due to a positively charged C-terminus that destabilizes the outer membrane, the use of physical or chemical means to disrupt the outer membrane integrity and protein engineering to equip the lysin with the necessary tools to overcome the outer membrane.
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Affiliation(s)
- Diana Gutiérrez
- Department of Biotechnology, Ghent University, Valentin Vaerwyckweg 1, 9000 Gent, Belgium
| | - Yves Briers
- Department of Biotechnology, Ghent University, Valentin Vaerwyckweg 1, 9000 Gent, Belgium.
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42
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Shao X, Xie Y, Zhang Y, Liu J, Ding Y, Wu M, Wang X, Deng X. Novel therapeutic strategies for treating Pseudomonas aeruginosa infection. Expert Opin Drug Discov 2020; 15:1403-1423. [PMID: 32880507 DOI: 10.1080/17460441.2020.1803274] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Persistent infections caused by the superbug Pseudomonas aeruginosa and its resistance to multiple antimicrobial agents are huge threats to patients with cystic fibrosis as well as those with compromised immune systems. Multidrug-resistant P. aeruginosa has posed a major challenge to conventional antibiotics and therapeutic approaches, which show limited efficacy and cause serious side effects. The public demand for new antibiotics is enormous; yet, drug development pipelines have started to run dry with limited targets available for inventing new antibacterial drugs. Consequently, it is important to uncover potential therapeutic targets. AREAS COVERED The authors review the current state of drug development strategies that are promising in terms of the development of novel and potent drugs to treat P. aeruginosa infection. EXPERT OPINION The prevention of P. aeruginosa infection is increasingly challenging. Furthermore, targeting key virulence regulators has great potential for developing novel anti-P. aeruginosa drugs. Additional promising strategies include bacteriophage therapy, immunotherapies, and antimicrobial peptides. Additionally, the authors believe that in the coming years, the overall network of molecular regulatory mechanism of P. aeruginosa virulence will be fully elucidated, which will provide more novel and promising drug targets for treating P. aeruginosa infections.
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Affiliation(s)
- Xiaolong Shao
- Department of Biomedical Sciences, City University of Hong Kong , Hong Kong SAR, China
| | - Yingpeng Xie
- Department of Biomedical Sciences, City University of Hong Kong , Hong Kong SAR, China
| | - Yingchao Zhang
- Department of Biomedical Sciences, City University of Hong Kong , Hong Kong SAR, China
| | - Jingui Liu
- Department of Biomedical Sciences, City University of Hong Kong , Hong Kong SAR, China
| | - Yiqing Ding
- Department of Biomedical Sciences, City University of Hong Kong , Hong Kong SAR, China
| | - Min Wu
- Department of Biomedical Sciences, University of North Dakota , Grand Forks, North Dakota, USA
| | - Xin Wang
- Department of Biomedical Sciences, City University of Hong Kong , Hong Kong SAR, China
| | - Xin Deng
- Department of Biomedical Sciences, City University of Hong Kong , Hong Kong SAR, China.,Shenzhen Research Institute, City University of Hong Kong , Shenzhen, China
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43
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Bacteriophage-derived endolysins to target gram-negative bacteria. Int J Pharm 2020; 589:119833. [PMID: 32877733 DOI: 10.1016/j.ijpharm.2020.119833] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/18/2020] [Accepted: 08/26/2020] [Indexed: 12/24/2022]
Abstract
Bacteriophage-encoded endolysins (lysins) have emerged as a novel class of antibacterial agents to combat the surging antibiotic resistance. Lysins have specific structures and mechanisms to exert antibacterial effect against both Gram-positive (G+ve) and Gram-negative (G-ve) bacteria. However, its use against G-ve bacteria is limited because the outer membrane (OM) of G-ve bacteria hinders the permeation of exogenously applied lysins. Besides identifying lysins with intrinsic OM permeability, several other approaches including combining lysins with outer membrane permeabilizers (OMPs), protein engineering and formulating with nanocarriers have been proposed to enhance the permeability and activity of lysins. In the present review, we summarize strategies that have been developed to enable lysins to target G-ve bacteria in the past decade. While lysins demonstrates clear potential in managing bacterial infections caused by the drug-resistant G-ve bacteria, there are still challenges hindering their translation into clinical settings, including safety issues with OMP use, low efficiency against stationary phase bacteria and problems in stability. The applicability of protein engineering and formulation sciences to improve enzyme stability, and combination therapy with other classes of antibacterial agents to maximize the therapeutic potential have also been reviewed.
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44
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Yuan Y, Li X, Wang L, Li G, Cong C, Li R, Cui H, Murtaza B, Xu Y. The endolysin of the Acinetobacter baumannii phage vB_AbaP_D2 shows broad antibacterial activity. Microb Biotechnol 2020; 14:403-418. [PMID: 32519416 PMCID: PMC7936296 DOI: 10.1111/1751-7915.13594] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 04/22/2020] [Accepted: 04/24/2020] [Indexed: 12/16/2022] Open
Abstract
The emergence and rapid spread of multidrug‐resistant bacteria has induced intense research for novel therapeutic approaches. In this study, the Acinetobacter baumannii bacteriophage D2 (vB_AbaP_D2) was isolated, characterized and sequenced. The endolysin of bacteriophage D2, namely Abtn‐4, contains an amphipathic helix and was found to have activity against multidrug‐resistant Gram‐negative strains. By more than 3 log units, A. baumannii were killed by Abtn‐4 (5 µM) in 2 h. In absence of outer membrane permeabilizers, Abtn‐4 exhibited broad antimicrobial activity against several Gram‐positive and Gram‐negative bacteria, such as Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumonia, Enterococcus and Salmonella. Furthermore, Abtn‐4 had the ability to reduce biofilm formation. Interestingly, Abtn‐4 showed antimicrobial activity against phage‐resistant bacterial mutants. Based on these results, endolysin Abtn‐4 may be a promising candidate therapeutic agent for multidrug‐resistant bacterial infections.
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Affiliation(s)
- Yuyu Yuan
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Xiaoyu Li
- School of Bioengineering, Dalian University of Technology, Dalian, China.,Ministry of Education Center for Food Safety of Animal Origin, Dalian, China
| | - Lili Wang
- School of Bioengineering, Dalian University of Technology, Dalian, China.,Ministry of Education Center for Food Safety of Animal Origin, Dalian, China
| | - Gen Li
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Cong Cong
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Ruihua Li
- The Second Hospital of Dalian Medical University, Dalian, China
| | - Huijing Cui
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Bilal Murtaza
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Yongping Xu
- School of Bioengineering, Dalian University of Technology, Dalian, China.,Ministry of Education Center for Food Safety of Animal Origin, Dalian, China
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45
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Ding Y, Zhang Y, Huang C, Wang J, Wang X. An Endolysin LysSE24 by Bacteriophage LPSE1 Confers Specific Bactericidal Activity against Multidrug-Resistant Salmonella Strains. Microorganisms 2020; 8:E737. [PMID: 32429030 PMCID: PMC7284969 DOI: 10.3390/microorganisms8050737] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/04/2020] [Accepted: 05/13/2020] [Indexed: 12/16/2022] Open
Abstract
Salmonella is responsible for a wide range of infections and is a constant threat to public health, particularly in light of emerging antibiotic resistance. The use of bacteriophages and phage endolysins as specific antibacterial agents is a promising strategy to control this bacterial infection. Endolysins are important proteins during the process of bacteria lysis by bacteriophages. In this study, we identify a novel endolysin, named LysSE24. LysSE24 was predicted to possess N-acetylmuramidases activity, with a molecular mass of ca. 17.4 kDa and pI 9.44. His-tagged LysSE24 was heterologously expressed and purified by Ni-NTA chromatography. LysSE24 exhibited optimal bactericidal activity against Salmonella Enteritidis ATCC 13076 at a concentration of 0.1 μM. Salmonella population (measured by OD600 nm) decreased significantly (p < 0.05) after 10 min of incubation in combination with the outer membrane permeabilizer in vitro. It also showed antibacterial activity against a panel of 23 tested multidrug-resistant Salmonella strains. Bactericidal activity of LysSE24 was evaluated in terms of pH, temperature, and ionic strength. It was very stable with different pH (4.0 to 10.0) at different temperatures (20 to 60 °C). Both K+ and Na+ at concentrations between 0.1 to 100 mM showed no effects on its bactericidal activity, while a high concentration of Ca2+ and Mg2+ showed efficacy. Transmission electron microscopy revealed that exposure to 0.1 μM LysSE24 for up to 5 min caused a remarkable modification of the cell shape of Salmonella Enteritidis ATCC 13076. These results indicate that recombinant LysSE24 represents a promising antimicrobial activity against Salmonella, especially several multidrug-resistant Salmonella strains. Further studies can be developed to improve its bactericidal activity without the need for pretreatment with outer membrane-destabilizing agents by synthetic biology methods.
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Affiliation(s)
- Yifeng Ding
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; (Y.D.); (J.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Y.Z.); (C.H.)
| | - Yu Zhang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Y.Z.); (C.H.)
| | - Chenxi Huang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Y.Z.); (C.H.)
| | - Jia Wang
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; (Y.D.); (J.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Y.Z.); (C.H.)
| | - Xiaohong Wang
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; (Y.D.); (J.W.)
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Y.Z.); (C.H.)
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Blasco L, Ambroa A, Trastoy R, Bleriot I, Moscoso M, Fernández-Garcia L, Perez-Nadales E, Fernández-Cuenca F, Torre-Cisneros J, Oteo-Iglesias J, Oliver A, Canton R, Kidd T, Navarro F, Miró E, Pascual A, Bou G, Martínez-Martínez L, Tomas M. In vitro and in vivo efficacy of combinations of colistin and different endolysins against clinical strains of multi-drug resistant pathogens. Sci Rep 2020; 10:7163. [PMID: 32346029 PMCID: PMC7188820 DOI: 10.1038/s41598-020-64145-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 04/13/2020] [Indexed: 12/15/2022] Open
Abstract
The emergence of multidrug resistant (MDR) pathogenic bacteria is jeopardizing the value of antimicrobials, which had previously changed the course of medical science. In this study, we identified endolysins ElyA1 and ElyA2 (GH108-PG3 family), present in the genome of bacteriophages Ab1051Φ and Ab1052Φ, respectively. The muralytic activity of these endolysins against MDR clinical isolates (Acinetobacter baumannii, Pseudomonas aeruginosa and Klebsiella pneumoniae) was tested using the turbidity reduction assay. Minimal inhibitory concentrations (MICs) of endolysin, colistin and a combination of endolysin and colistin were determined, and the antimicrobial activity of each treatment was confirmed by time kill curves. Endolysin ElyA1 displayed activity against all 25 strains of A. baumannii and P. aeruginosa tested and against 13 out of 17 strains of K. pneumoniae. Endolysin ElyA2 did not display any such activity. The combined antimicrobial activity of colistin and ElyA1 yielded a reduction in the colistin MIC for all strains studied, except K. pneumoniae. These results were confirmed in vivo in G. mellonella survival assays and in murine skin and lung infection models. In conclusion, combining colistin (1/4 MIC) with the new endolysin ElyA1 (350 µg) enhanced the bactericidal activity of colistin in both in vitro and in vivo studies. This will potentially enable reduction of the dose of colistin used in clinical practice.
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Affiliation(s)
- Lucia Blasco
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
| | - Anton Ambroa
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
| | - Rocio Trastoy
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
| | - Ines Bleriot
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
| | - Miriam Moscoso
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Laura Fernández-Garcia
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
| | - Elena Perez-Nadales
- Unit of Microbiology, University Hospital Reina Sofía, Department of Microbiology, University of Córdoba, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Cordoba, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Felipe Fernández-Cuenca
- Clinical Unit for Infectious Diseases, Microbiology and Preventive Medicine, Hospital Universitario Virgen Macarena / Department of Microbiology and Medicine, University of Seville/ Biomedicine Institute of Seville (IBIS), Seville, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Julian Torre-Cisneros
- Unit of Microbiology, University Hospital Reina Sofía, Department of Microbiology, University of Córdoba, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Cordoba, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Jesus Oteo-Iglesias
- Reference and Research Laboratory for Antibiotic Resistance and Health Care Infections, National Centre for Microbiology, Institute of Health Carlos III, Majadahonda, Madrid, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Antonio Oliver
- Microbiology Department-Research Institute Biomedical Islas Baleares (IdISBa), Hospital Son Espases, Palma de Mallorca, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Rafael Canton
- Microbiology Department-Research Institute Biomedical Ramón and Cajal (IRYCIS), Hospital Ramón and Cajal, Madrid, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Tim Kidd
- School of Chemistry and Molecular Biosciences and Child Health Research Centre, The University of Queensland, Brisbane, QLD, Australia
| | - Ferran Navarro
- Microbiology Department-Sant Pau Hospital, Barcelona, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
| | - Elisenda Miró
- Microbiology Department-Sant Pau Hospital, Barcelona, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
| | - Alvaro Pascual
- Clinical Unit for Infectious Diseases, Microbiology and Preventive Medicine, Hospital Universitario Virgen Macarena / Department of Microbiology and Medicine, University of Seville/ Biomedicine Institute of Seville (IBIS), Seville, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - German Bou
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Luis Martínez-Martínez
- Unit of Microbiology, University Hospital Reina Sofía, Department of Microbiology, University of Córdoba, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Cordoba, Spain
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain
| | - Maria Tomas
- Microbiology Department-Research Institute Biomedical A Coruña (INIBIC), Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain.
- Study Group on Mechanisms of Action and Resistance to Antimicrobials (GEMARA) of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), Madrid, Spain.
- Spanish Network for Research in Infectious Diseases (REIPI), Seville, Spain.
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Gram-Negative Bacterial Lysins. Antibiotics (Basel) 2020; 9:antibiotics9020074. [PMID: 32054067 PMCID: PMC7168136 DOI: 10.3390/antibiotics9020074] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 12/13/2022] Open
Abstract
Antibiotics have had a profound impact on human society by enabling the eradication of otherwise deadly infections. Unfortunately, antibiotic use and overuse has led to the rapid spread of acquired antibiotic resistance, creating a major threat to public health. Novel therapeutic agents called bacteriophage endolysins (lysins) provide a solution to the worldwide epidemic of antibiotic resistance. Lysins are a class of enzymes produced by bacteriophages during the lytic cycle, which are capable of cleaving bonds in the bacterial cell wall, resulting in the death of the bacteria within seconds after contact. Through evolutionary selection of the phage progeny to be released and spread, these lysins target different critical components in the cell wall, making resistance to these molecules orders of magnitude less likely than conventional antibiotics. Such properties make lysins uniquely suitable for the treatment of multidrug resistant bacterial pathogens. Lysins, either naturally occurring or engineered, have the potential of being developed into fast-acting, narrow-spectrum, biofilm-disrupting antimicrobials that act synergistically with standard of care antibiotics. This review focuses on newly discovered classes of Gram-negative lysins with emphasis on prototypical enzymes that have been evaluated for efficacy against the major antibiotic resistant organisms causing nosocomial infections.
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Gondil VS, Harjai K, Chhibber S. Endolysins as emerging alternative therapeutic agents to counter drug-resistant infections. Int J Antimicrob Agents 2019; 55:105844. [PMID: 31715257 DOI: 10.1016/j.ijantimicag.2019.11.001] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 08/02/2019] [Accepted: 11/05/2019] [Indexed: 12/19/2022]
Abstract
Endolysins are the lytic products of bacteriophages which play a specific role in the release of phage progeny by degrading the peptidoglycan of the host bacterium. In the light of antibiotic resistance, endolysins are being considered as alternative therapeutic agents because of their exceptional ability to target bacterial cells when applied externally. Endolysins have been studied against a number of drug-resistant pathogens to assess their therapeutic ability. This review focuses on the structure of endolysins in terms of cell binding and catalytic domains, lytic ability, resistance, safety, immunogenicity and future applications. It primarily reviews recent advancements made in evaluation of the therapeutic potential of endolysins, including their origin, host range, applications, and synergy with conventional and non-conventional antimicrobial agents.
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Affiliation(s)
- Vijay Singh Gondil
- Department of Microbiology, Basic Medical Sciences, Panjab University, Chandigarh, India
| | - Kusum Harjai
- Department of Microbiology, Basic Medical Sciences, Panjab University, Chandigarh, India
| | - Sanjay Chhibber
- Department of Microbiology, Basic Medical Sciences, Panjab University, Chandigarh, India.
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Liu A, Wang Y, Cai X, Jiang S, Cai X, Shen L, Liu Y, Han G, Chen S, Wang J, Wu W, Li C, Liu S, Wang X. Characterization of endolysins from bacteriophage LPST10 and evaluation of their potential for controlling Salmonella Typhimurium on lettuce. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108372] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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50
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Bioinformatic analyses of a potential Salmonella-virus-FelixO1 biocontrol phage BPS15S6 and the characterisation and anti-Enterobacteriaceae-pathogen activity of its endolysin LyS15S6. Antonie van Leeuwenhoek 2019; 112:1577-1592. [DOI: 10.1007/s10482-019-01283-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 05/21/2019] [Indexed: 12/18/2022]
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