1
|
Gheorghita AA, Wozniak DJ, Parsek MR, Howell PL. Pseudomonas aeruginosa biofilm exopolysaccharides: assembly, function, and degradation. FEMS Microbiol Rev 2023; 47:fuad060. [PMID: 37884397 PMCID: PMC10644985 DOI: 10.1093/femsre/fuad060] [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: 04/21/2023] [Revised: 10/04/2023] [Accepted: 10/25/2023] [Indexed: 10/28/2023] Open
Abstract
The biofilm matrix is a fortress; sheltering bacteria in a protective and nourishing barrier that allows for growth and adaptation to various surroundings. A variety of different components are found within the matrix including water, lipids, proteins, extracellular DNA, RNA, membrane vesicles, phages, and exopolysaccharides. As part of its biofilm matrix, Pseudomonas aeruginosa is genetically capable of producing three chemically distinct exopolysaccharides - alginate, Pel, and Psl - each of which has a distinct role in biofilm formation and immune evasion during infection. The polymers are produced by highly conserved mechanisms of secretion, involving many proteins that span both the inner and outer bacterial membranes. Experimentally determined structures, predictive modelling of proteins whose structures are yet to be solved, and structural homology comparisons give us insight into the molecular mechanisms of these secretion systems, from polymer synthesis to modification and export. Here, we review recent advances that enhance our understanding of P. aeruginosa multiprotein exopolysaccharide biosynthetic complexes, and how the glycoside hydrolases/lyases within these systems have been commandeered for antimicrobial applications.
Collapse
Affiliation(s)
- Andreea A Gheorghita
- Program in Molecular Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada
- Department of Biochemistry, University of Toronto, Medical Science Building, 1 King's College Cir, Toronto, ON M5S 1A8, Canada
| | - Daniel J Wozniak
- Department of Microbial Infection and Immunity, The Ohio State University College of Medicine, 776 Biomedical Research Tower, 460 W 12th Ave, Columbus, OH 43210, United States
- Department of Microbiology, The Ohio State University College, Biological Sciences Bldg, 105, 484 W 12th Ave, Columbus, OH 43210, United States
| | - Matthew R Parsek
- Department of Microbiology, University of Washington, Health Sciences Bldg, 1705 NE Pacific St, Seattle, WA 98195-7735, United States
| | - P Lynne Howell
- Program in Molecular Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada
- Department of Biochemistry, University of Toronto, Medical Science Building, 1 King's College Cir, Toronto, ON M5S 1A8, Canada
| |
Collapse
|
2
|
Patel KK, Tripathi M, Pandey N, Agrawal AK, Gade S, Anjum MM, Tilak R, Singh S. Alginate lyase immobilized chitosan nanoparticles of ciprofloxacin for the improved antimicrobial activity against the biofilm associated mucoid P. aeruginosa infection in cystic fibrosis. Int J Pharm 2019; 563:30-42. [DOI: 10.1016/j.ijpharm.2019.03.051] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/19/2019] [Accepted: 03/25/2019] [Indexed: 12/14/2022]
|
3
|
Rello J, van Engelen TSR, Alp E, Calandra T, Cattoir V, Kern WV, Netea MG, Nseir S, Opal SM, van de Veerdonk FL, Wilcox MH, Wiersinga WJ. Towards precision medicine in sepsis: a position paper from the European Society of Clinical Microbiology and Infectious Diseases. Clin Microbiol Infect 2018; 24:1264-1272. [PMID: 29581049 DOI: 10.1016/j.cmi.2018.03.011] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 03/06/2018] [Accepted: 03/10/2018] [Indexed: 12/30/2022]
Abstract
BACKGROUND Our current understanding of the pathophysiology and management of sepsis is associated with a lack of progress in clinical trials, which partly reflects insufficient appreciation of the heterogeneity of this syndrome. Consequently, more patient-specific approaches to treatment should be explored. AIMS To summarize the current evidence on precision medicine in sepsis, with an emphasis on translation from theory to clinical practice. A secondary objective is to develop a framework enclosing recommendations on management and priorities for further research. SOURCES A global search strategy was performed in the MEDLINE database through the PubMed search engine (last search December 2017). No restrictions of study design, time, or language were imposed. CONTENT The focus of this Position Paper is on the interplay between therapies, pathogens, and the host. Regarding the pathogen, microbiologic diagnostic approaches (such as blood cultures (BCs) and rapid diagnostic tests (RDTs)) are discussed, as well as targeted antibiotic treatment. Other topics include the disruption of host immune system and the use of biomarkers in sepsis management, patient stratification, and future clinical trial design. Lastly, personalized antibiotic treatment and stewardship are addressed (Fig. 1). IMPLICATIONS A road map provides recommendations and future perspectives. RDTs and identifying drug-response phenotypes are clear challenges. The next step will be the implementation of precision medicine to sepsis management, based on theranostic methodology. This highly individualized approach will be essential for the design of novel clinical trials and improvement of care pathways.
Collapse
Affiliation(s)
- J Rello
- CIBERES, Vall d'Hebron Barcelona Campus Hospital, European Study Group of Infections in Critically Ill Patients (ESGCIP), Barcelona, Spain.
| | - T S R van Engelen
- Centre for Experimental Molecular Medicine, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - E Alp
- Department of Infectious Diseases, Infection Control Committee, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - T Calandra
- Infectious Diseases Service, Department of Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - V Cattoir
- University Hospital of Rennes, Department of Clinical Microbiology, Rennes, France and National Reference Center for Antimicrobial Resistance (lab Enterococci), Rennes, France
| | - W V Kern
- Division of Infectious Diseases, Department of Medicine, University Hospital and Medical Centre, Albert-Ludwigs-University Faculty of Medicine, Freiburg, Germany; Executive Committee of ESCMID Study Group for Bloodstream Infections and Sepsis (ESGBIS), The Netherlands
| | - M G Netea
- Department of Internal Medicine and Radboud Centre for Infectious Diseases (RCI), Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands; Human Genomics Laboratory, Craiova University of Medicine and Pharmacy, Craiova, Romania
| | - S Nseir
- Faculté de Médecine, University of Lille and Centre de Réanimation, CHU Lille, Lille, France
| | - S M Opal
- Brown University, Infectious Diseases, Providence, RI, USA
| | - F L van de Veerdonk
- Department of Internal Medicine and Radboud Centre for Infectious Diseases (RCI), Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - M H Wilcox
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust, University of Leeds, Leeds, UK
| | - W J Wiersinga
- Centre for Experimental Molecular Medicine, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands; Department of Medicine, Division of Infectious Diseases, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands; Executive Committee of ESCMID Study Group for Bloodstream Infections and Sepsis (ESGBIS), The Netherlands.
| |
Collapse
|
4
|
Cho H, Huang X, Lan Piao Y, Eun Kim D, Yeon Lee S, Jeong Yoon E, Hee Park S, Lee K, Ho Jang C, Zhan CG. Molecular modeling and redesign of alginate lyase from Pseudomonas aeruginosa for accelerating CRPA biofilm degradation. Proteins 2016; 84:1875-1887. [PMID: 27676452 DOI: 10.1002/prot.25171] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 08/31/2016] [Accepted: 09/16/2016] [Indexed: 11/12/2022]
Abstract
Administration of an efficient alginate lyase (AlgL) or AlgL mutant may be a promising therapeutic strategy for treatment of cystic fibrosis patients with Pseudomonas aeruginosa infections. Nevertheless, the catalytic activity of wild-type AlgL is not sufficiently high. It is highly desired to design and discover an AlgL mutant with significantly improved catalytic efficiency against alginate substrates. For the purpose of identifying an AlgL mutant with significantly improved catalytic activity, in this study, we first constructed and validated a structural model of AlgL interacting with substrate, providing a better understanding of the interactions between AlgL and its substrate. Based on the modeling insights, further enzyme redesign and experimental testing led to discovery of AlgL mutants, including the K197D/K321A mutant, with significantly improved catalytic activities against alginate and acetylated alginate in ciprofloxacin-resistant P. aeruginosa (CRPA) biofilms. Further anti-biofilm activity assays have confirmed that the K197D/K321A mutant with piperacillin/tazobactam is indeed effective in degrading the CRPA biofilms. Co-administration of the potent mutant AlgL and an antibiotic (such as a nebulizer) could be effective for therapeutic treatment of CRPA-infected patients with cystic fibrosis. Proteins 2016; 84:1875-1887. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Hoon Cho
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Xiaoqin Huang
- Molecular Modeling and Biopharmaceutical Center, Center of Pharmaceutical Research and Innovation, and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky
| | - Yu Lan Piao
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Da Eun Kim
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - So Yeon Lee
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Eun Jeong Yoon
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - So Hee Park
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Kyoung Lee
- Department of Microbiology, Changwon National University, Changwon, Kyongnam, 641-773, Republic of Korea
| | - Chul Ho Jang
- Department of Otolaryngology, Chonnam National University Medical School, Gwangju, 501-757, Republic of Korea
| | - Chang-Guo Zhan
- Molecular Modeling and Biopharmaceutical Center, Center of Pharmaceutical Research and Innovation, and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky
| |
Collapse
|
5
|
Harimawan A, Ting YP. Investigation of extracellular polymeric substances (EPS) properties of P. aeruginosa and B. subtilis and their role in bacterial adhesion. Colloids Surf B Biointerfaces 2016; 146:459-67. [DOI: 10.1016/j.colsurfb.2016.06.039] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 06/21/2016] [Accepted: 06/22/2016] [Indexed: 10/21/2022]
|
6
|
Jang CH, Piao YL, Huang X, Yoon EJ, Park SH, Lee K, Zhan CG, Cho H. Modeling and Re-Engineering of Azotobacter vinelandii Alginate Lyase to Enhance Its Catalytic Efficiency for Accelerating Biofilm Degradation. PLoS One 2016; 11:e0156197. [PMID: 27253324 PMCID: PMC4890793 DOI: 10.1371/journal.pone.0156197] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 05/10/2016] [Indexed: 02/07/2023] Open
Abstract
Alginate is known to prevent elimination of Pseudomonas aeruginosa biofilms. Alginate lyase (AlgL) might therefore facilitate treatment of Pseudomonas aeruginosa-infected cystic fibrosis patients. However, the catalytic activity of wild-type AlgL is not sufficiently high. Therefore, molecular modeling and site-directed mutagenesis of AlgL might assist in enzyme engineering for therapeutic development. AlgL, isolated from Azotobacter vinelandii, catalyzes depolymerization of alginate via a β-elimination reaction. AlgL was modeled based on the crystal structure template of Sphingomonas AlgL species A1-III. Based on this computational analysis, AlgL was subjected to site-directed mutagenesis to improve its catalytic activity. The kcat/Km of the K194E mutant showed a nearly 5-fold increase against the acetylated alginate substrate, as compared to the wild-type. Double and triple mutants (K194E/K245D, K245D/K319A, K194E/K245D/E312D, and K194E/K245D/K319A) were also prepared. The most potent mutant was observed to be K194E/K245D/K319A, which has a 10-fold improved kcat value (against acetylated alginate) compared to the wild-type enzyme. The antibiofilm effect of both AlgL forms was identified in combination with piperacillin/tazobactam (PT) and the disruption effect was significantly higher in mutant AlgL combined with PT than wild-type AlgL. However, for both the wild-type and K194E/K245D/K319A mutant, the use of the AlgL enzyme alone did not show significant antibiofilm effect.
Collapse
Affiliation(s)
- Chul Ho Jang
- Department of Otolaryngology, Chonnam National University Medical School, Gwangju, 501–757, Republic of Korea
| | - Yu Lan Piao
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| | - Xiaoqin Huang
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky, 40536, United States of America
| | - Eun Jeong Yoon
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| | - So Hee Park
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| | - Kyoung Lee
- Department of Microbiology, Changwon National University, Changwon, Kyongnam, 641–773, Republic of Korea
| | - Chang-Guo Zhan
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky, 40536, United States of America
| | - Hoon Cho
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| |
Collapse
|
7
|
Ramírez-Estrada S, Borgatta B, Rello J. Pseudomonas aeruginosa ventilator-associated pneumonia management. Infect Drug Resist 2016; 9:7-18. [PMID: 26855594 PMCID: PMC4725638 DOI: 10.2147/idr.s50669] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Ventilator-associated pneumonia is the most common infection in intensive care unit patients associated with high morbidity rates and elevated economic costs; Pseudomonas aeruginosa is one of the most frequent bacteria linked with this entity, with a high attributable mortality despite adequate treatment that is increased in the presence of multiresistant strains, a situation that is becoming more common in intensive care units. In this manuscript, we review the current management of ventilator-associated pneumonia due to P. aeruginosa, the most recent antipseudomonal agents, and new adjunctive therapies that are shifting the way we treat these infections. We support early initiation of broad-spectrum antipseudomonal antibiotics in present, followed by culture-guided monotherapy de-escalation when susceptibilities are available. Future management should be directed at blocking virulence; the role of alternative strategies such as new antibiotics, nebulized treatments, and vaccines is promising.
Collapse
Affiliation(s)
| | - Bárbara Borgatta
- Critical Care Department, Vall d’Hebron University Hospital, Barcelona, Spain
- CRIPS, Vall d’Hebron Institute of Research (VHIR), Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
| | - Jordi Rello
- Department of Medicine, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
- Centro de Investigación Biomédica en Red Enfermedad Respiratoria – CIBERES, Madrid, Spain
| |
Collapse
|
8
|
Cheng G, Hao H, Xie S, Wang X, Dai M, Huang L, Yuan Z. Antibiotic alternatives: the substitution of antibiotics in animal husbandry? Front Microbiol 2014; 5:217. [PMID: 24860564 PMCID: PMC4026712 DOI: 10.3389/fmicb.2014.00217] [Citation(s) in RCA: 317] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 04/25/2014] [Indexed: 12/21/2022] Open
Abstract
It is a common practice for decades to use of sub-therapeutic dose of antibiotics in food-animal feeds to prevent animals from diseases and to improve production performance in modern animal husbandry. In the meantime, concerns over the increasing emergence of antibiotic-resistant bacteria due to the unreasonable use of antibiotics and an appearance of less novelty antibiotics have prompted efforts to develop so-called alternatives to antibiotics. Whether or not the alternatives could really replace antibiotics remains a controversial issue. This review summarizes recent development and perspectives of alternatives to antibiotics. The mechanism of actions, applications, and prospectives of the alternatives such as immunity modulating agents, bacteriophages and their lysins, antimicrobial peptides, pro-, pre-, and synbiotics, plant extracts, inhibitors targeting pathogenicity (bacterial quorum sensing, biofilm, and virulence), and feeding enzymes are thoroughly discussed. Lastly, the feasibility of alternatives to antibiotics is deeply analyzed. It is hard to conclude that the alternatives might substitute antibiotics in veterinary medicine in the foreseeable future. At the present time, prudent use of antibiotics and the establishment of scientific monitoring systems are the best and fastest way to limit the adverse effects of the abuse of antibiotics and to ensure the safety of animal-derived food and environment.
Collapse
Affiliation(s)
- Guyue Cheng
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Haihong Hao
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Shuyu Xie
- National Reference Laboratory of Veterinary Drug Residues, Huazhong Agricultural University Wuhan, China ; MOA Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural University Wuhan, China
| | - Xu Wang
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Menghong Dai
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Lingli Huang
- National Reference Laboratory of Veterinary Drug Residues, Huazhong Agricultural University Wuhan, China ; MOA Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural University Wuhan, China
| | - Zonghui Yuan
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China ; National Reference Laboratory of Veterinary Drug Residues, Huazhong Agricultural University Wuhan, China ; MOA Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural University Wuhan, China
| |
Collapse
|
9
|
Gan M, Tang Y, Shu Y, Wu H, Chen L. Massively parallel bacterial and yeast suspension culture on a chip. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:863-7. [PMID: 22294524 DOI: 10.1002/smll.201102322] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Indexed: 05/07/2023]
Affiliation(s)
- Mingzhe Gan
- Suzhou Institute of Nano-Tech and Nano-Bionics, Ruoshui Road 398, Suzhou 215123, P. R. China
| | | | | | | | | |
Collapse
|
10
|
Hamza A, Piao YL, Kim MS, Choi CH, Zhan CG, Cho H. Insight into the binding of the wild type and mutated alginate lyase (AlyVI) with its substrate: a computational and experimental study. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2011; 1814:1739-47. [PMID: 21945375 DOI: 10.1016/j.bbapap.2011.08.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 08/10/2011] [Accepted: 08/30/2011] [Indexed: 10/17/2022]
Abstract
The homology model of the wild type alginate lyase (AlyVI) marine bacterium Vibrio sp. protein, was built using the crystal structure of the Family 7 alginate lyase from Sphingomonas sp. A1. To rationalize the observed structure-affinity relationships of aliginate lyase alyVI with its (GGG) substrate, molecular docking, MD imulations and binding free energy calculations followed by site-directed mutagenesis and alyVI activity assays were carried out. Per-residue decomposition of the (GGG) binding energy revealed that the most important contributions were from polar and charged residues, such as Asn138, Arg143, Asn217, and Lys308, while van der Waals interactions were responsible for binding with the catalytic His200 and Tyr312 residues. The mutants H200A, K308A, Y312A, Y312F, and W165A were found to be inactive or almost inactive. However, the catalytic efficiency (k(cat)/K(m)) of the double mutant L224V/D226G increased by two-fold compared to the wild type enzyme. This first structural model with its substrate binding mode and the agreement with experimental results provide a suitable base for the future rational design of new mutated alyVI structures with improved catalytic activity.
Collapse
Affiliation(s)
- Adel Hamza
- Research Centre for Resistant Cells, Chosun University Medical School, Gwangju, South Korea
| | | | | | | | | | | |
Collapse
|
11
|
Impact of alginate overproduction on attachment and biofilm architecture of a supermucoid Pseudomonas aeruginosa strain. Appl Environ Microbiol 2009; 75:6022-5. [PMID: 19648373 DOI: 10.1128/aem.01078-09] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The supermucoid Pseudomonas aeruginosa strain PDO300Deltaalg8(pBBR1MCS-5:alg8) showed strongly impaired attachment compared with the respective mucoid or nonmucoid strains and formed a thicker biofilm with large extended mushroom-like microcolonies. Alginate lyase treatment dissolved microcolonies. The data suggested that alginate overproduction impairs attachment but plays a structural role in microcolony formation.
Collapse
|
12
|
Alipour M, Suntres ZE, Omri A. Importance of DNase and alginate lyase for enhancing free and liposome encapsulated aminoglycoside activity against Pseudomonas aeruginosa. J Antimicrob Chemother 2009; 64:317-25. [DOI: 10.1093/jac/dkp165] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
|
13
|
Li Y, Xie YY, Chen RX, Xu HZ, Zhang GJ, Li JZ, Li XM. Effects of combined treatment with sansanmycin and macrolides on Pseudomonas aeruginosa and formation of biofilm. BIOMEDICAL AND ENVIRONMENTAL SCIENCES : BES 2009; 22:170-177. [PMID: 19618697 DOI: 10.1016/s0895-3988(09)60042-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To observe the effects of combined treatment with sansanmycin and macrolides on Pseudomonas aeruginosa and formation of biofilm. METHODS Micro-dilution method was used to determine the minimal inhibitory concentrations (MICs) of sansanmycin, gentamycin, carbenicillin, polymyxin B, roxithromycin, piperacillin, and tazobactam. PA1 and PA27853 biofilms were observed under optical microscope after staining and under SEM after treatment with sansanmycin at different dosages and combined treatment with sansanmycin and roxithromycin. Viable bacteria in PA1 and PA27853 biofilms were counted after treatment with sansanmycin at different dosages or combined treatment with sansanmycin and roxithromycin. RESULTS The MIC of sansanmycin was lower than that of gentamycin and polymyxin B, but was higher than that of carbenicillin. Roxithromycin enhanced the penetration of sansanmycin to PA1 and PA27853 strains through biofilms. PA1 and PA27853 biofilms were gradually cleared with the increased dosages of sansanmycin or with the combined sansanmycin and roxithromycin. CONCLUSION Sub-MIC levels of roxithromycin and sansanmycin substantially inhibit the generation of biofilms and proliferation of bacteria. Therefore, combined antibiotics can be used in treatment of intractable bacterial infection.
Collapse
Affiliation(s)
- Yue Li
- Department of Microbiology, Tianjin Medical University, Tianjin 300070, China
| | | | | | | | | | | | | |
Collapse
|
14
|
|
15
|
Shankar S, Ye RW, Schlictman D, Chakrabarty AM. Exopolysaccharide alginate synthesis in Pseudomonas aeruginosa: enzymology and regulation of gene expression. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 70:221-55. [PMID: 8638483 DOI: 10.1002/9780470123164.ch4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- S Shankar
- Department of Microbiology and Immunology, University of Illinois, College of Medicine, Chicago, USA
| | | | | | | |
Collapse
|
16
|
A Novel Alginate Lyase with High Activity on Acetylated Alginate of Pseudomonas aeruginosa FRD1 from Pseudomonas sp. QD03. World J Microbiol Biotechnol 2006. [DOI: 10.1007/s11274-005-7713-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
17
|
Loiselle M, Anderson KW. The use of cellulase in inhibiting biofilm formation from organisms commonly found on medical implants. BIOFOULING 2003; 19:77-85. [PMID: 14618691 DOI: 10.1080/0892701021000030142] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A study was made of the use of cellulase to inhibit biofilm formation by a pathogenic bacterium commonly found in medical implants. A Pseudomonas aeruginosa biofilm was grown on glass slides in a parallel flow chamber for 4 d with glucose as the nutrient source. Biofilm development was assessed by measuring the colony forming units (CFU) and biomass areal density. Biofilm was grown at pH 5 and 7 in the presence of three different cellulase concentrations, 9.4, 37.6 and 75.2 units ml-1. In addition, a control study using deactivated cellulase was performed. The results show that cellulase is effective in partially inhibiting biomass and CFU formation by P. aeruginosa on glass surfaces. The effect of cellulase depended on concentration and was more effective at pH 5 than pH 7. The experiment was further extended by investigating the effect of cellulase on the apparent molecular weight of purified P. aeruginosa exopolysaccharides (EPS). The observation of EPS using size exclusion chromatography showed a decrease in apparent molecular weight when incubated with enzyme. An increase in the amount of reducing sugar with time when the purified EPS were incubated with enzyme also supports the hypothesis that cellulase degrades the EPS of P. aeruginosa. While cellulase does not provide total inhibition of biofilm formation, it is possible that the enzyme could be used in combination with other treatments or in combinations with other enzymes to increase effectiveness.
Collapse
Affiliation(s)
- Melanie Loiselle
- Department of Chemical and Materials Engineering, 177 Anderson Hall, University of Kentucky, Lexington, KY 40506-0046, USA
| | | |
Collapse
|
18
|
Lillehoj EP, Hyun SW, Kim BT, Zhang XG, Lee DI, Rowland S, Kim KC. Muc1 mucins on the cell surface are adhesion sites for Pseudomonas aeruginosa. Am J Physiol Lung Cell Mol Physiol 2001; 280:L181-7. [PMID: 11133508 DOI: 10.1152/ajplung.2001.280.1.l181] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Recently, we cloned and characterized a full-length cDNA of the hamster Muc1 gene, the expression of which appears to be associated with secretory cell differentiation (Park HR, Hyun SW, and Kim KC. Am J Respir Cell Mol Biol 15: 237-244, 1996). The role of Muc1 mucins in the airway, however, is unknown. In this study, we investigated whether cell surface mucins are adhesion sites for Pseudomonas aeruginosa. Chinese hamster ovary (CHO) cells not normally expressing Muc1 mucin were stably transfected with the hamster Muc1 cDNA, and binding to P. aeruginosa was examined. Our results showed that 1) stably transfected CHO cells expressed both Muc1 mRNA and Muc1 mucins based on Northern and Western blot analyses, 2) Muc1 mucins present on the cell surface were degraded by neutrophil elastase, and 3) expression of Muc1 mucins on the cell surface resulted in a significant increase in adhesion of P. aeruginosa that was completely abolished by either proteolytic cleavage with neutrophil elastase or deletion of the extracellular domain by mutation. We conclude that Muc1 mucins expressed on the surface of CHO cells serve as adhesion sites for P. aeruginosa, suggesting a possible role for these glycoproteins in the early stage of airway infection and providing a model system for studying epithelial cell responses to bacterial adhesion that leads to airway inflammation in general and cystic fibrosis in particular.
Collapse
Affiliation(s)
- E P Lillehoj
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland 21201, USA
| | | | | | | | | | | | | |
Collapse
|
19
|
Waligora AJ, Barc MC, Bourlioux P, Collignon A, Karjalainen T. Clostridium difficile cell attachment is modified by environmental factors. Appl Environ Microbiol 1999; 65:4234-8. [PMID: 10473442 PMCID: PMC99767 DOI: 10.1128/aem.65.9.4234-4238.1999] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/1999] [Accepted: 06/28/1999] [Indexed: 11/20/2022] Open
Abstract
Adherence of Clostridium difficile to Vero cells under anaerobic conditions was increased by a high sodium concentration, calcium-rich medium, an acidic pH, and iron starvation. The level of adhesion of nontoxigenic strains was comparable to that of toxigenic strains. Depending on the bacterial culture conditions, Vero cells could bind to one, two, or three bacterial surface proteins with molecular masses of 70, 50, and 40 kDa.
Collapse
Affiliation(s)
- A J Waligora
- Département de Microbiologie, Faculté de Pharmacie, Université de Paris-Sud, 92296 Châtenay-Malabry Cedex, France
| | | | | | | | | |
Collapse
|
20
|
Gacesa P. Bacterial alginate biosynthesis--recent progress and future prospects. MICROBIOLOGY (READING, ENGLAND) 1998; 144 ( Pt 5):1133-1143. [PMID: 9611788 DOI: 10.1099/00221287-144-5-1133] [Citation(s) in RCA: 137] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The extracellular polysaccharide alginate has been widely associated with chronic Pseudomonas aeruginosa infections in the cystic fibrosis lung. However, it is clear that alginate biosynthesis is a more widespread phenomenon. Alginate plays a key role as a virulence factor of plant-pathogenic pseudomonads, in the formation of biofilms and with the encystment process of Azotobacter spp.
Collapse
Affiliation(s)
- Peter Gacesa
- Faculty of Science and Engineering, Manchester Metropolitan University, John Dalton Extension, Chester Street, Manchester M1 5GD, UK
| |
Collapse
|
21
|
Govan JR, Deretic V. Microbial pathogenesis in cystic fibrosis: mucoid Pseudomonas aeruginosa and Burkholderia cepacia. Microbiol Rev 1996; 60:539-74. [PMID: 8840786 PMCID: PMC239456 DOI: 10.1128/mr.60.3.539-574.1996] [Citation(s) in RCA: 838] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Respiratory infections with Pseudomonas aeruginosa and Burkholderia cepacia play a major role in the pathogenesis of cystic fibrosis (CF). This review summarizes the latest advances in understanding host-pathogen interactions in CF with an emphasis on the role and control of conversion to mucoidy in P. aeruginosa, a phenomenon epitomizing the adaptation of this opportunistic pathogen to the chronic chourse of infection in CF, and on the innate resistance to antibiotics of B. cepacia, person-to-person spread, and sometimes rapidly fatal disease caused by this organism. While understanding the mechanism of conversion to mucoidy in P. aeruginosa has progressed to the point where this phenomenon has evolved into a model system for studying bacterial stress response in microbial pathogenesis, the more recent challenge with B. cepacia, which has emerged as a potent bona fide CF pathogen, is discussed in the context of clinical issues, taxonomy, transmission, and potential modes of pathogenicity.
Collapse
Affiliation(s)
- J R Govan
- Department of Medical Microbiology, University of Edinburgh Medical School, Scotland
| | | |
Collapse
|
22
|
Hobden JA, Gupta SK, Masinick SA, Wu X, Kernacki KA, Berk RS, Hazlett LD. Anti-receptor antibodies inhibit Pseudomonas aeruginosa binding to the cornea and prevent corneal perforation. Immunol Cell Biol 1996; 74:258-64. [PMID: 8799726 DOI: 10.1038/icb.1996.46] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A polyclonal antibody (pAb) against gangliotetraosylceramide (asialo GM1), a glycolipid to which bacterial pili and LPS bind, and a mAb against a 66 kDa pilus-binding protein purified from adult mouse corneal epithelium were used to determine if antibodies against host receptors for bacterial adhesins could inhibit bacterial binding to wounded corneal epithelium and protect ocularly challenged mice from corneal perforation when topically applied. Bacteria were mixed with anti-66 kDa mAb, a mixture of anti-asialo GM1 pAb and anti-66 kDa mAb, an irrelevant control mAb (anti-human histocompatibility Ag HLA-DR5) or PBS prior to application to scarified corneas in organ culture. The combination of the two antibodies or the anti-66 kDa mAb alone was effective in reducing bacterial adherence compared with either PBS or the antibody control. To determine if these antibodies were protective in vivo, corneas of C57BL/6J mice were scarified and inoculated with Pseudomonas aeruginosa. Eyes were treated topically with anti-asialo GM1 pAb, anti-66 kDa mAb, a mixture of the two or control mouse serum. More serum-treated corneas perforated compared to corneas from any other group (P < or = 0.005) by 30 days postinfection. Treatment with a combination of the two antibodies resulted in significantly less corneal pathology 30 days p.i. when compared to any other treatment (P < or = 0.005). These data provide evidence that antibodies against host corneal receptors significantly inhibit bacterial binding in vitro and when applied topically in vivo, lessen the severity of ocular disease characteristic of P. aeruginosa keratitis.
Collapse
Affiliation(s)
- J A Hobden
- Department of Anatomy and Cell Biology, Wayne State University, School of Medicine, Detroit, Michigan 48201, USA
| | | | | | | | | | | | | |
Collapse
|
23
|
Trafny EA, Stepińska M, Antos M, Grzybowski J. Effects of free and liposome-encapsulated antibiotics on adherence of Pseudomonas aeruginosa to collagen type I. Antimicrob Agents Chemother 1995; 39:2645-9. [PMID: 8592995 PMCID: PMC163005 DOI: 10.1128/aac.39.12.2645] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The adherence of 27 clinical Pseudomonas aeruginosa strains to collagen type I was investigated by using a solid-phase assay. The influence of free antibiotics (amikacin, gentamicin, piperacillin, bacitracin, and polymyxin B) and liposome-entrapped antibiotics (amikacin and polymyxin B) on bacterial attachment to collagen type I was examined. The greatest inhibitory effect was shown for free and liposomal amikacin, which decreased the attachment of 74 and 100% of tested strains, respectively. The mean percent attachment (+/- standard deviation) in the presence of free amikacin was 65.7% (+/- 12.0%) as measured by solid-phase assay. In the presence of liposomal amikacin, the attachment ranged from 17.3% (+/- 6.0%) to 42.1% (+/- 9.4%), depending on the antibiotic solvent. In contrast, polymyxin B, even at a subinhibitory concentration, enhanced attachment of all P. aeruginosa isolates to collagen. Liposomal polymyxin B displayed a protective effect only when the encapsulated drug was of a low concentration. Application of liposome-encapsulated amikacin may be advantageous in injured tissues in which extracellular matrix structures become exposed.
Collapse
Affiliation(s)
- E A Trafny
- Microbiology Department, Military Institute of Hygiene and Epidemiology, Warsaw, Poland
| | | | | | | |
Collapse
|
24
|
Adherence of Haemophilus influenzae to dacron fibres: significance of capsule and biotype. J Microbiol Methods 1995. [DOI: 10.1016/0167-7012(95)00059-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
25
|
Boyd A, Chakrabarty AM. Pseudomonas aeruginosa biofilms: role of the alginate exopolysaccharide. JOURNAL OF INDUSTRIAL MICROBIOLOGY 1995; 15:162-8. [PMID: 8519473 DOI: 10.1007/bf01569821] [Citation(s) in RCA: 168] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Pseudomonas aeruginosa synthesizes an exopolysaccharide called alginate in response to environmental conditions. Alginate serves to protect the bacteria from adversity in its surroundings and also enhances adhesion to solid surfaces. Transcription of the alginate biosynthetic genes is induced upon attachment to the substratum and this leads to increased alginate production. As a result, biofilms develop which are advantageous to the survival and growth of the bacteria. In certain circumstances, P. aeruginosa produces an alginate lyase enzyme which cleaves the polymer into short oligosaccharides. This negates the anchoring properties of the alginate and results in increased detachment of the bacteria away from the surface, allowing them to spread and colonize new sites. Thus, both alginate biosynthetic and degradative enzymes are important for the development, maintenance and spread of P. aeruginosa biofilms.
Collapse
Affiliation(s)
- A Boyd
- Department of Microbiology and Immunology, University of Illinois, Chicago College of Medicine 60612, USA
| | | |
Collapse
|
26
|
Abstract
The exopolysaccharide alginate of Pseudomonas aeruginosa was shown to be important in determining the degree of cell detachment from an agar surface. Nonmucoid strain 8822 gave rise to 50-fold more sloughed cells than mucoid strains 8821 and 8830. Alginate anchors the bacteria to the agar surface, thereby influencing the extent of detachment. The role of the P. aeruginosa alginate lyase in the process of cell sloughing was investigated. Increased expression of the alginate lyase in mucoid strain 8830 led to alginate degradation and increased cell detachment. Similar effects were seen both when the alginate lyase was induced at the initial stage of cell inoculation and when it was induced at a later stage of growth. It appears that high-molecular-weight alginate polymers are required to efficiently retain the bacteria within the growth film. When expressed from a regulated promoter, the alginate lyase can induce enhanced sloughing of cells because of degradation of the alginate. This suggests a possible role for the lyase in the development of bacterial growth films.
Collapse
Affiliation(s)
- A Boyd
- Department of Microbiology and Immunology, University of Illinois College of Medicine, Chicago 60612
| | | |
Collapse
|
27
|
Mikami B, Hisano T, Yamashita T, Inose T, Takagi M, Sakaguchi K, Kimura A, Imanaka T, Murata K. Crystallization and preliminary X-ray diffraction studies of bacterial alginate lyase. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0922-338x(94)90155-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
28
|
Høiby N, Giwercman B, Jensen ET, Pedersen SS, Koch C, Kharazmi A. Mechanism of action of antibiotics in chronic pulmonary pseudomonas infection. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 1994; 30:53-84. [PMID: 7833297 DOI: 10.1016/s1054-3589(08)60172-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- N Høiby
- Department of Clinical Microbiology Danish Cystic Fibrosis Centre, Copenhagen, Denmark
| | | | | | | | | | | |
Collapse
|