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Xuan TF, Liu J, Wang ZQ, Chen WM, Lin J. Fluorescent Detection of the Ubiquitous Bacterial Messenger 3',5' Cyclic Diguanylic Acid by Using a Small Aromatic Molecule. Front Microbiol 2020; 10:3163. [PMID: 31993044 PMCID: PMC6970945 DOI: 10.3389/fmicb.2019.03163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 12/31/2019] [Indexed: 12/28/2022] Open
Abstract
3′,5′ Cyclic diguanylic acid (c-di-GMP) has been shown to play a central role in the regulation of bacterial physiological processes such as biofilm formation and virulence production, and is regarded as a potential target for the development of anti-infective drugs. A method for the facile detection of the bacterial level of cellular c-di-GMP is required to explore the details of c-di-GMP signaling and design drugs on the basis of this pathway. Current methods of c-di-GMP detection have limited sensitivity or difficultly in probe preparation. Herein a new fluorescent probe is reported for the detection of c-di-GMP at concentrations as low as 500 nM. The probe was developed on the basis of the G-quadruplex formation of c-di-GMP induced by aromatic molecules. When used on crude bacterial cell lysates, it can effectively distinguish between the low c-di-GMP levels of bacteria in plankton and the high c-di-GMP levels in biofilm. The method described here is simple, inexpensive, sensitive, and suitable for practical applications involving the rapid detection of cellular c-di-GMP levels in vitro after simple bacterial lysis and filtration.
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Affiliation(s)
- Teng-Fei Xuan
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou, China
| | - Jun Liu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou, China
| | - Zi-Qiang Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou, China
| | - Wei-Min Chen
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou, China
| | - Jing Lin
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou, China
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202
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Li J, Yu H, Yang X, Dong R, Liu Z, Zeng M. Complete genome sequence provides insights into the quorum sensing-related spoilage potential of Shewanella baltica 128 isolated from spoiled shrimp. Genomics 2020; 112:736-748. [DOI: 10.1016/j.ygeno.2019.05.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 05/10/2019] [Accepted: 05/10/2019] [Indexed: 12/16/2022]
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203
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Lorek A, Dennis R, van Dijk J, Bannoehr J. Occult otitis media in dogs with chronic otitis externa - magnetic resonance imaging and association with otoscopic and cytological findings. Vet Dermatol 2019; 31:146-153. [PMID: 31858646 DOI: 10.1111/vde.12817] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND Identification of perpetuating factors, such as otitis media (OM), is important for the successful management of canine chronic otitis externa (OE). HYPOTHESIS/OBJECTIVES Occult OM can occur in cases of chronic OE; a focused magnetic resonance imaging (MRI) examination is a useful tool in their management. ANIMALS One hundred twenty one client-owned dogs presented for investigation and treatment of chronic OE between 2009 and 2018. METHODS AND MATERIALS Mixed retrospective (74 dogs) and prospective (47 dogs) study of chronic OE cases without neurological signs, describing the MRI, otoscopic and cytological findings; comparing cases with and without MRI evidence of OM. RESULTS A total of 123 MRI studies were analysed (two dogs scanned twice). A short, focused MRI scan allowed detection of inflammation of the mucosal bulla lining as well as excellent discrimination between avascular material and vascularised soft tissue in the tympanic cavity. OM was found in 41 of 197 (21%) ears with chronic otitis externa. On otoscopy, the tympanic membrane was intact in six of 41 ears (15%), ruptured in 16 of 41 (39%) and not visible in 14 of 41 (34%) [no data in five of 41 (12%)]. Analysis of cytological findings showed that the presence of rods was only associated with an increased likelihood of OM when found together with inflammatory cells. CONCLUSIONS AND CLINICAL IMPORTANCE Occult OM is a not uncommon finding on MRI of dogs with chronic OE. A targeted MRI study ("bulla mini-scan") may be useful as part of the clinical investigations.
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Affiliation(s)
- Andrea Lorek
- Animal Health Trust, Centre for Small Animal Studies, Lanwades Park, Kentford, Newmarket, CB8 7UU, UK
| | - Ruth Dennis
- Animal Health Trust, Centre for Small Animal Studies, Lanwades Park, Kentford, Newmarket, CB8 7UU, UK
| | - Jan van Dijk
- Epidemiology and Surveillance, Animal Health Trust, Lanwades Park, Kentford, Newmarket, CB8 7UU, UK
| | - Jeanette Bannoehr
- Animal Health Trust, Centre for Small Animal Studies, Lanwades Park, Kentford, Newmarket, CB8 7UU, UK
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204
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The antimicrobial peptide ZY4 combats multidrug-resistant Pseudomonas aeruginosa and Acinetobacter baumannii infection. Proc Natl Acad Sci U S A 2019; 116:26516-26522. [PMID: 31843919 PMCID: PMC6936460 DOI: 10.1073/pnas.1909585117] [Citation(s) in RCA: 161] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The emergence of carbapenem-resistant Acinetobacter baumannii and Pseudomonas aeruginosa raises fears of untreatable infections and poses the greatest health threats. Antimicrobial peptides (AMPs) are regarded as the most ideal solution to this menace. In this study, a set of peptides was designed based on our previously reported peptide cathelicidin-BF-15, and the lead peptide ZY4, a cyclic peptide stabilized by a disulfide bridge with high stability in vivo (the half-life is 1.8 h), showed excellent activity against P. aeruginosa and A. baumannii, including standard and clinical multidrug-resistant (MDR) strains. ZY4 killed bacteria by permeabilizing the bacterial membrane and showed low propensity to induce resistance, exhibited biofilm inhibition and eradication activities, and also killed persister cells. Notably, administration of ZY4 decreased susceptibility to lung infection by P. aeruginosa and suppressed dissemination of P. aeruginosa and A. baumannii to target organs in a mouse septicemia infection model. These findings identify ZY4 as an ideal candidate against MDR bacterial infections.
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205
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Potential of Novel Bacterial Cellulose Dressings Chemisorbed with Antiseptics for the Treatment of Oral Biofilm Infections. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9245321] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Infections of the oral cavity are caused by multicellular communities of microbes, referred to as biofilms. Due to the high tolerance of biofilms to antibiotics and specific conditions within the oral cavity, there is an ongoing search for carriers that are able to deliver high local concentrations of potent antimicrobials that can eradicate pathogenic biofilms. Bacterial cellulose, owing to its high flexibility, absorbance, and release potential, meets these demands. In this work we chemisorbed bacterial cellulose with antiseptics containing povidone-iodine or polihexanide and analyzed their ability to eradicate in vitro biofilms formed by oral pathogens, such as Aggregatibacter actinomycetemcomitans, Enterococcus faecalis, Candida albicans, Streptococcus mutans, Staphylococcus aureus, and Pseudomonas aeruginosa. In tests performed by means of standard laboratory methods and with a long contact time (24 h), all antiseptics released from the cellulose dressings displayed a very high antibiofilm efficacy. On the other hand, when conditions imitating the oral cavity were used and cellulose dressings were applied for a 0.5–1 h contact time, the antiseptics released from the dressings displayed lower, though still acceptable, activity. Our findings indicate that besides species-specific resistance to particular antiseptic agents, environmental and experimental settings play an essential role in outcomes. Finally, in a proof-of-concept experiment performed in an oral cavity typodont model, we demonstrated the high flexibility and adhesiveness of antiseptic-containing cellulose dressings. Our novel findings, if developed in further studies, may lead to the introduction of new types of dressings that are able to efficiently deal with biofilm infections of the oral cavity.
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206
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Role of extracellular polymeric substances in biofilm formation by Pseudomonas stutzeri strain XL-2. Appl Microbiol Biotechnol 2019; 103:9169-9180. [PMID: 31673743 DOI: 10.1007/s00253-019-10188-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/25/2019] [Accepted: 10/07/2019] [Indexed: 01/12/2023]
Abstract
Pseudomonas stutzeri strain XL-2 exhibited significant performance on biofilm formation. Extracellular polymeric substances (EPS) secreted by strain XL-2 were characterized by colorimetry and Fourier transform infrared (FT-IR) spectroscopy. The biofilm growth showed a strong positive correlation (rP=0.96, P<0.01) to extracellular protein content, but no correlation to exopolysaccharide content. Hydrolyzing the biofilm with proteinase K caused a significant decrease in biofilm growth (t=3.7, P<0.05), whereas the changes in biofilm growth were not significant when the biofilm was hydrolyzed by α-amylase and β-amylase, implying that proteins rather than polysaccharides played the dominant role in biofilm formation. More specifically, confocal laser scanning microscopy (CLSM) revealed that the extracellular proteins were tightly bound to the cells, resulting in the cells with EPS presenting more biofilm promotion protein secondary structures, such as three-turn helices, β-sheet, and α-helices, than cells without EPS. Both bio-assays and quantitative analysis demonstrated that strain XL-2 produced signal molecules of N-acylhomoserine lactones (AHLs) during biofilm formation process. The concentrations of C6-HLS and C6-oxo-HLS were both significantly positively correlated with protein contents (P<0.05). Dosing exogenous C6-HLS and C6-oxo-HLS also resulted in the increase in protein content. Therefore, it was speculated that C6-HLS and C6-oxo-HLS released by strain XL-2 could up-regulate the secretion of proteins in EPS, and thus promote the formation of biofilm.
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207
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Advances in Legionella Control by a New Formulation of Hydrogen Peroxide and Silver Salts in a Hospital Hot Water Network. Pathogens 2019; 8:pathogens8040209. [PMID: 31671765 PMCID: PMC6963979 DOI: 10.3390/pathogens8040209] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/24/2019] [Accepted: 10/25/2019] [Indexed: 01/22/2023] Open
Abstract
Legionella surveillance is an important issue in public health, linked to the severity of disease and the difficulty associated with eradicating this bacterium from the water environment. Different treatments are suggested to reduce Legionella risk, however long-term studies of their efficiency are lacking. This study focused on the activity of a new formulation of hydrogen peroxide and silver salts, WTP828, in the hospital hot water network (HWN) to contain Legionella contamination during two years of treatment. The effectiveness of WTP828 was tested measuring physical-chemical and microbiological parameters such as Legionella, Pseudomonas aeruginosa (P. aeruginosa), and a heterotopic plate count (HPC) at 36 °C. Legionella isolates were identified by serotyping and genotyping. WTP 828 induced a reduction in Legionella–positive sites (60% to 36%) and contamination levels (2.12 to 1.7 log10 CFU/L), with isolates belonging to L. pneumophila SG1 (ST1 and ST104), L. anisa and L. rubrilucens widely distributed in HWN. No relevant contamination was found for other parameters tested. The long-term effect of WTP828 on Legionella containment suggest the easy and safe application of this disinfectant, that combined with knowledge of building characteristics, an adequate environmental monitoring and risk assessment plan, become the key elements in preventing Legionella contamination and exposure.
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208
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Robertson SN, Childs PG, Akinbobola A, Henriquez FL, Ramage G, Reid S, Mackay WG, Williams C. Reduction of Pseudomonas aeruginosa biofilm formation through the application of nanoscale vibration. J Biosci Bioeng 2019; 129:379-386. [PMID: 31623950 DOI: 10.1016/j.jbiosc.2019.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 08/13/2019] [Accepted: 09/06/2019] [Indexed: 01/30/2023]
Abstract
Bacterial biofilms pose a significant burden in both healthcare and industrial environments. With the limited effectiveness of current biofilm control strategies, novel or adjunctive methods in biofilm control are being actively pursued. Reported here, is the first evidence of the application of nanovibrational stimulation (nanokicking) to reduce the biofilm formation of Pseudomonas aeruginosa. Nanoscale vertical displacements (approximately 60 nm) were imposed on P. aeruginosa cultures, with a significant reduction in biomass formation observed at frequencies between 200 and 4000 Hz at 24 h. The optimal reduction of biofilm formation was observed at 1 kHz, with changes in the physical morphology of the biofilms. Scanning electron microscope imaging of control and biofilms formed under nanovibrational stimulation gave indication of a reduction in extracellular matrix (ECM). Quantification of the carbohydrate and protein components of the ECM was performed and showed a significant reduction at 24 h at 1 kHz frequency. To model the forces being exerted by nanovibrational stimulation, laser interferometry was performed to measure the amplitudes produced across the Petri dish surfaces. Estimated peak forces on each cell, associated with the nanovibrational stimulation technique, were calculated to be in the order of 10 pN during initial biofilm formation. This represents a potential method of controlling microbial biofilm formation in a number of important settings in industry and medical related processes.
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Affiliation(s)
- Shaun N Robertson
- Institute of Healthcare, Policy and Practice, School of Health & Life Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK; SUPA, Institute of Thin Films, Sensors and Imaging, School of Engineering and Computing, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK; SUPA, Department of Biomedical Engineering, University of Strathclyde, 40 George Street, Glasgow G1 1QE, Scotland, UK
| | - Peter G Childs
- SUPA, Institute of Thin Films, Sensors and Imaging, School of Engineering and Computing, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK; Centre for the Cellular Microenvironments (CeMi), School of Engineering, University of Glasgow, G12 8LT, Scotland, UK
| | - Ayorinde Akinbobola
- Institute of Healthcare, Policy and Practice, School of Health & Life Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK
| | - Fiona L Henriquez
- Institute of Biomedical and Environmental Health Research, School of Health & Life Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK
| | - Gordon Ramage
- School of Medicine, Dentistry and Nursing, MVLS, University of Glasgow, 378 Sauchiehall St, Glasgow G2 3JZ, Scotland, UK
| | - Stuart Reid
- SUPA, Institute of Thin Films, Sensors and Imaging, School of Engineering and Computing, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK; SUPA, Department of Biomedical Engineering, University of Strathclyde, 40 George Street, Glasgow G1 1QE, Scotland, UK
| | - William G Mackay
- Institute of Healthcare, Policy and Practice, School of Health & Life Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK.
| | - Craig Williams
- Institute of Healthcare, Policy and Practice, School of Health & Life Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, Scotland, UK
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209
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Bó LG, Almeida RM, Cardoso CMM, Zavarize DG, Brum SS, Mendonça ARV. Acetylsalicylic acid biosorption onto fungal-bacterial biofilm supported on activated carbons: an investigation via batch and fixed-bed experiments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:28962-28976. [PMID: 31388951 DOI: 10.1007/s11356-019-06075-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
This study reports on acetylsalicylic acid (ASA) biosorption onto fungal-bacterial biofilm supported on two types of activated carbons (one commercial type made of coconut fibers, CAC, and one other manufactured from fruit rinds of Hymenaea stigonocarpa Mart., HYAC, which after biofilm inoculation, they were named CAC-b and HYAC-b), via batch and fixed-bed experiments. These materials were characterized by BET Specific Surface Area and Scanning Electronic Microscopy (SEM). Biosorption onto HYAC-b was 57.2% higher than HYAC. Despite presenting the highest biosorption capacity over time (qt = 85.4 ± 0.82 mg g-1), CAC-b had a lower increase in efficiency (32.4%) compared to CAC. Kinetic data from the biosorption experiments responded well to the pseudo-first-order model thus suggests the predominance of physisorption, while without biofilm presence, there was a better agreement with the pseudo-second-order model, suggesting chemisorption. The possible interaction mechanism of ASA to biofilm was attributed to ionic forces between the drug in anionic form and eventual presence of cationic by-products of the biologically active surface metabolism. Biosorption equilibrium data responded better to the Sips model and CAC-b presented the highest biosorption capacity (qe = 292.4 ± 2.01 mg g-1). A combination of faster volumetric flow rates, higher inlet concentrations and shorter beds accelerated the breakthrough time of ASA biosorption in the fixed-bed experiments. These operational conditions affected C/Co ratio in the following magnitude order: volumetric flow rate < inlet concentration < bed height. Breakthrough data responded better to the modified dose-response model compared to Thomas and Yoon-Nelson models.
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Affiliation(s)
- Luma Gomes Bó
- Chemistry Institute, University of Brasilia, Brasilia, 70910-900, Brazil
| | | | | | - Danilo Gualberto Zavarize
- Department of Environmental Engineering, Federal University of Tocantins, Palmas, 77001-090, Brazil.
| | - Sarah Silva Brum
- Chemistry Institute, University of Brasilia, Brasilia, 70910-900, Brazil
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210
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Antioxidant and Quorum Quenching Activity against Pseudomonas aeruginosa SU-18 of some Edible Fruit Juices. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.3.64] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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211
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New Poly(Propylene Imine) Dendrimer Modified with Acridine and Its Cu(II) Complex: Synthesis, Characterization and Antimicrobial Activity. MATERIALS 2019; 12:ma12183020. [PMID: 31540365 PMCID: PMC6766332 DOI: 10.3390/ma12183020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 09/12/2019] [Accepted: 09/16/2019] [Indexed: 02/02/2023]
Abstract
A second-generation poly(propylene imine) dendrimer modified with acridine and its Cu(II) complex have been synthesized for the first time. It has been found that two copper ions form complexes with the nitrogen atoms of the dendrimeric core by coordinate bonds. The new compounds have been characterized by nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR), fourier-transform infrared spectroscopy (FTIR) and fluorescence spectroscopy. The spectral characteristics of the modified dendrimer have been measured in different organic solvents, and a negative fluorescence solvatochromism has been observed. The antimicrobial activity of the dendrimers has been tested against model pathogenic microorganisms in agar and by broth dilution method. The cotton fabric treated with both dendrimers has been evaluated towards pathogenic microorganisms. The obtained modified cotton fabrics have been shown to hamper bacterial growth and to prevent biofilm formation. Dendrimer cytotoxicity has been investigated in vitro in the model HEp-2 cell line.
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212
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Abou Neel EA, Kiani A, Valappil SP, Mordan NM, Baek S, Zakir Hossain KM, Felfel RM, Ahmed I, Divakarl K, Chrzanowski W, Knowles JC. Glass microparticle‐ versus microsphere‐filled experimental dental adhesives. J Appl Polym Sci 2019. [DOI: 10.1002/app.47832] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ensanya A. Abou Neel
- Division of Biomaterials, Restorative Dentistry DepartmentKing Abdulaziz University Jeddah Saudi Arabia
- Biomaterials Department, Faculty of DentistryTanta University Tanta Egypt
- Biomaterials and Tissue Engineering DivisionUCL, Eastman Dental Institute 256 Gray's Inn Road, London WC1X 8LD United Kingdom
| | - Azadeh Kiani
- Biomaterials and Tissue Engineering DivisionUCL, Eastman Dental Institute 256 Gray's Inn Road, London WC1X 8LD United Kingdom
| | - Sabeel P. Valappil
- Department of Health Services Research and School of DentistryUniversity of Liverpool Research Wing, Daulby Street, Liverpool L69 3GN United Kingdom
| | - Nicky M. Mordan
- Biomaterials and Tissue Engineering DivisionUCL, Eastman Dental Institute 256 Gray's Inn Road, London WC1X 8LD United Kingdom
| | - Song‐Yi Baek
- Biomaterials and Tissue Engineering DivisionUCL, Eastman Dental Institute 256 Gray's Inn Road, London WC1X 8LD United Kingdom
| | - Kazi M. Zakir Hossain
- Department of ChemistryUniversity of Bath Claverton Down, Bath BA2 7AY United Kingdom
| | - Reda M. Felfel
- Advanced Materials Research Group, Faculty of EngineeringUniversity of Nottingham United Kingdom
- Physics Department, Faculty of ScienceMansoura University Mansoura 35516 Egypt
| | - Ifty Ahmed
- Advanced Materials Research Group, Faculty of EngineeringUniversity of Nottingham United Kingdom
| | - Kamini Divakarl
- The Australian Institute for Nanoscale Science and TechnologyThe University of Sydney NSW 2006 Sydney Australia
| | - Wojciech Chrzanowski
- The Australian Institute for Nanoscale Science and TechnologyThe University of Sydney NSW 2006 Sydney Australia
| | - Jonathan C. Knowles
- Biomaterials and Tissue Engineering DivisionUCL, Eastman Dental Institute 256 Gray's Inn Road, London WC1X 8LD United Kingdom
- The Discoveries Centre for Regenerative and Precision MedicineUCL Campus London United Kingdom
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative MedicineDankook University Cheonan 31114 Republic of Korea
- UCL Eastman‐Korea Dental Medicine Innovation CentreDankook University Cheonan 31114 Republic of Korea
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213
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Gebreyohannes G, Nyerere A, Bii C, Sbhatu DB. Challenges of intervention, treatment, and antibiotic resistance of biofilm-forming microorganisms. Heliyon 2019; 5:e02192. [PMID: 31463386 PMCID: PMC6709409 DOI: 10.1016/j.heliyon.2019.e02192] [Citation(s) in RCA: 189] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/17/2019] [Accepted: 07/29/2019] [Indexed: 01/23/2023] Open
Abstract
Background Biofilms are multicellular communities of microorganisms held together by a self-produced extracellular matrix. The ability of microbes to form biofilm is a universal, ubiquitous, and dynamic process. This dynamic process of biofilms establishes an important strategy to withstand and survive harsh environmental conditions and antimicrobial agents. Objective This review paper aims to give an overview of antibiotic resistance, intervention, and treatment of infections caused by biofilm-forming organisms. Moreover, it can also help to motivate scholars to search for new anti-biofilm strategies and most appropriate methods to tackle the effect of biofilm infections on healthcare services. Methods This paper was written by reviewing recent research and review articles which are reporting about the antibiotic resistance, prevention, and treatment of biofilm-producing organisms. Conclusion Bioprospecting for quorum quenching compounds can be an appropriate solution for controlling biofilm infections.
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Affiliation(s)
- Gebreselema Gebreyohannes
- Department of Biological and Chemical Engineering, Mekelle Institute of Technology, Mekelle University, Ethiopia.,Molecular Biology and Biotechnology, Pan African University, Institute for Basic Sciences, Technology, and Innovation, Nairobi, Kenya
| | - Andrew Nyerere
- Department of Medical Microbiology, College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Christine Bii
- Center for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Desta Berhe Sbhatu
- Department of Biological and Chemical Engineering, Mekelle Institute of Technology, Mekelle University, Ethiopia
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214
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Chen D, Zhou X, Chen X, Huang L, Xi X, Ma C, Zhou M, Wang L, Chen T. Evaluating the Bioactivity of a Novel Antimicrobial and Anticancer Peptide, Dermaseptin-PS4(Der-PS4), from the Skin Secretion of Phyllomedusa sauvagii. Molecules 2019; 24:molecules24162974. [PMID: 31426323 PMCID: PMC6719146 DOI: 10.3390/molecules24162974] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/11/2019] [Accepted: 08/15/2019] [Indexed: 12/15/2022] Open
Abstract
Dermaseptins belonging to a large family of cationic membrane-disruption antimicrobial peptides display extensive antibacterial and antiproliferative activities depending on a coil-to-helix transition and the specific structural parameters. Herein, a novel dermaseptin peptide named Der-PS4 was discovered from the skin secretion of the waxy monkey tree frog, Phyllomedusa sauvagii. The complementary DNA (cDNA)-encoding precursor was obtained relying on "shotgun" cloning, and afterwards, a mature peptide amino acid sequence was identified by reverse-phase high performance liquid chromatography (RP-HPLC) and MS/MS. Specimens were chemically synthesized and applied for further functional studies. Structural analysis demonstrated a higher α-helical content in the membrane-mimetic environment compared with that in the ammonium acetate/water circumstance. Der-PS4 displayed a broad spectrum of antimicrobial activities against tested pathogenic microorganisms, however, exhibiting slight membrane-damaging effectiveness towards horse red blood cells. Coincident with the inhibitory activities on pathogens, Der-PS4 also showed considerable biofilm eradicating impact. Also, Der-PS4 penetrated cell membrane in a relative short period under each minimum bactericidal concentration. In addition, Der-PS4 possessed antiproliferative capacity against five cancer cell lines, while presenting slight suppressing effect on human microvascular endothelial, HMEC-1. These findings provide a promising insight for the discovery and development of novel drugs from a natural source.
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Affiliation(s)
- Dong Chen
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK
| | - Xiaowei Zhou
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK
- Department of Nutrition, Henry Fok School of Food Science and Engineering, Shaoguan University, Shaoguan 512005, China
| | - Xi Chen
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK
| | - Linyuan Huang
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK.
- School of Life Sciences and Technology, China Pharmaceutical University, Nanjing 211198, China.
| | - Xinping Xi
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK.
| | - Chengbang Ma
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK
| | - Mei Zhou
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK
| | - Lei Wang
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK
| | - Tianbao Chen
- Natural Drug Discovery Group, School of Pharmacy, Queen's University, Belfast BT9 7BL, UK
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215
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Barreto-Santamaría A, Patarroyo ME, Curtidor H. Designing and optimizing new antimicrobial peptides: all targets are not the same. Crit Rev Clin Lab Sci 2019; 56:351-373. [DOI: 10.1080/10408363.2019.1631249] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Adriana Barreto-Santamaría
- Fundación Instituto de Inmunología de Colombia - FIDIC, Receptor-Ligand Department, Bogotá D.C, Colombia
- Universidad del Rosario, School of Medicine and Health Sciences, Bogotá D.C., Colombia
| | - Manuel E. Patarroyo
- Fundación Instituto de Inmunología de Colombia - FIDIC, Receptor-Ligand Department, Bogotá D.C, Colombia
- Universidad Nacional de Colombia - Bogotá, Faculty of Medicine, Bogotá D.C., Colombia
| | - Hernando Curtidor
- Fundación Instituto de Inmunología de Colombia - FIDIC, Receptor-Ligand Department, Bogotá D.C, Colombia
- Universidad del Rosario, School of Medicine and Health Sciences, Bogotá D.C., Colombia
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216
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Werner BG, Wu JY, Goddard JM. Antimicrobial and antifouling polymeric coating mitigates persistence of Pseudomonas aeruginosa biofilm. BIOFOULING 2019; 35:785-795. [PMID: 31550928 DOI: 10.1080/08927014.2019.1660774] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/30/2019] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
Food wasted due to food spoilage remains a global challenge to the environmental sustainability and security of food supply. In food manufacturing, post-processing contamination of food can occur due to persistent bacterial biofilms, which can be resistant to conventional cleaning and sanitization. The objective was to characterize the efficacy of a polymeric coating in reducing Pseudomonas aeruginosa biofilm establishment and facilitating its removal. Viable cell density of a 48 h biofilm was reduced by 2.10 log cfu cm-2 on the coated surface, compared to native polypropylene. Confocal laser scanning and electron microscopy indicated reductions in mature biofilm viability and thickness on the coated material. The antifouling coating improved cleanability, with ∼2.5 log cfu cm-2 of viable cells remaining after 105 min cleaning by water at 65 °C, compared to 4.5 log cfu cm-2 remaining on native polypropylene. Such coatings may reduce the persistence of biofilms in food processing environments, in support of reducing food spoilage and waste.
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Affiliation(s)
- Brenda G Werner
- Department of Food Science, Cornell University , Ithaca , NY , USA
| | - Julia Y Wu
- Department of Food Science, Cornell University , Ithaca , NY , USA
| | - Julie M Goddard
- Department of Food Science, Cornell University , Ithaca , NY , USA
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217
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Yan S, Wu G. Can Biofilm Be Reversed Through Quorum Sensing in Pseudomonas aeruginosa? Front Microbiol 2019; 10:1582. [PMID: 31396166 PMCID: PMC6664025 DOI: 10.3389/fmicb.2019.01582] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 06/25/2019] [Indexed: 11/27/2022] Open
Abstract
Pseudomonas aeruginosa is a Gram-negative bacterium causing diseases in plants, animals, and humans, and its drug resistance is a major concern in medical care. Biofilms play an important role in P. aeruginosa drug resistance. Three factors are most important to induce biofilm: quorum sensing (QS), bis-(3′-5′)-cyclic diguanosine monophosphate (c-di-GMP), and small RNAs (sRNAs). P. aeruginosa has its own specific QS system (PQS) besides two common QS systems, LasI–LasR and RhlI–RhlR, in bacteria. PQS is interesting not only because there is a negative regulation from RhlR to pqsR but also because the null mutation in PQS leads to a reduced biofilm formation. Furthermore, P. aeruginosa dispersed cells have physiological features that are distinct between the planktonic cells and biofilm cells. In response to a low concentration of c-di-GMP, P. aeruginosa cells can disperse from the biofilms to become planktonic cells. These raise an interesting hypothesis of whether biofilm can be reversed through the QS mechanism in P. aeruginosa. Although a single factor is certainly not sufficient to prevent the biofilm formation, it necessarily explores such possibility. In this hypothesis, the literature is analyzed to determine the negative regulation pathways, and then the transcriptomic data are analyzed to determine whether this hypothesis is workable or not. Unexpectedly, the transcriptomic data reveal a negative regulation between lasI and psqR. Also, the individual cases from transcriptomic data demonstrate the negative regulations of PQS with laslI, laslR, rhlI, and rhlR under different experiments. Based on our analyses, possible strategies to reverse biofilm formation are proposed and their clinic implications are addressed.
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Affiliation(s)
- Shaomin Yan
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, Nanning, China
| | - Guang Wu
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, Nanning, China
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218
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Biofilms: The Microbial "Protective Clothing" in Extreme Environments. Int J Mol Sci 2019; 20:ijms20143423. [PMID: 31336824 PMCID: PMC6679078 DOI: 10.3390/ijms20143423] [Citation(s) in RCA: 398] [Impact Index Per Article: 79.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/04/2019] [Accepted: 07/11/2019] [Indexed: 02/07/2023] Open
Abstract
Microbial biofilms are communities of aggregated microbial cells embedded in a self-produced matrix of extracellular polymeric substances (EPS). Biofilms are recalcitrant to extreme environments, and can protect microorganisms from ultraviolet (UV) radiation, extreme temperature, extreme pH, high salinity, high pressure, poor nutrients, antibiotics, etc., by acting as "protective clothing". In recent years, research works on biofilms have been mainly focused on biofilm-associated infections and strategies for combating microbial biofilms. In this review, we focus instead on the contemporary perspectives of biofilm formation in extreme environments, and describe the fundamental roles of biofilm in protecting microbial exposure to extreme environmental stresses and the regulatory factors involved in biofilm formation. Understanding the mechanisms of biofilm formation in extreme environments is essential for the employment of beneficial microorganisms and prevention of harmful microorganisms.
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219
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Pham DTN, Khan F, Phan TTV, Park SK, Manivasagan P, Oh J, Kim YM. Biofilm inhibition, modulation of virulence and motility properties by FeOOH nanoparticle in Pseudomonas aeruginosa. Braz J Microbiol 2019; 50:791-805. [PMID: 31250405 DOI: 10.1007/s42770-019-00108-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 06/18/2019] [Indexed: 10/26/2022] Open
Abstract
Biofilm formation is one of the resistance mechanisms of Pseudomonas aeruginosa against antimicrobial compounds. Biofilm formation also characterizes for the infection and pathogenesis of P. aeruginosa, along with production of various virulence factors. With recent development of nanotechnology, the present study aims to employ the synthetic iron nanoparticle (FeOOH-NP) as an active agent to inhibit the formation of P. aeruginosa biofilm. The FeOOH-NP was synthesized and characterized with rod shape and average size of 40 nm. Inhibition of biofilm formation by the FeOOH-NP is in a concentration-dependent manner, with inhibition of biofilm formation increased as the FeOOH-NP concentration increased. Microscopic observations also confirmed the disruption of the biofilm architecture in the presence of the FeOOH-NP. In addition, the presence of the FeOOH-NP was also found to modulate bacterial motility as well as some other important virulence factors produced simultaneously with biofilm formation. These findings provide insights to anti-biofilm effect of a new iron NP, contributing to the search for an effective agent to combat P. aeruginosa infections resulted from biofilm formation.
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Affiliation(s)
- Dung Thuy Nguyen Pham
- Department of Food Science and Technology, Pukyong National University, Busan, 48513, South Korea
| | - Fazlurrahman Khan
- Marine-Integrated Bionics Research Center, Pukyong National University, Busan, 48513, South Korea
| | - Thi Tuong Vy Phan
- Department of Biomedical Engineering, Pukyong National University, Busan, 48513, South Korea
| | - Seul-Ki Park
- Department of Food Science and Technology, Pukyong National University, Busan, 48513, South Korea
| | - Panchanathan Manivasagan
- Marine-Integrated Bionics Research Center, Pukyong National University, Busan, 48513, South Korea
| | - Junghwan Oh
- Marine-Integrated Bionics Research Center, Pukyong National University, Busan, 48513, South Korea.,Department of Biomedical Engineering, Pukyong National University, Busan, 48513, South Korea
| | - Young-Mog Kim
- Department of Food Science and Technology, Pukyong National University, Busan, 48513, South Korea. .,Marine-Integrated Bionics Research Center, Pukyong National University, Busan, 48513, South Korea.
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220
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Malhotra S, Hayes D, Wozniak DJ. Cystic Fibrosis and Pseudomonas aeruginosa: the Host-Microbe Interface. Clin Microbiol Rev 2019; 32:e00138-18. [PMID: 31142499 PMCID: PMC6589863 DOI: 10.1128/cmr.00138-18] [Citation(s) in RCA: 244] [Impact Index Per Article: 48.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In human pathophysiology, the clash between microbial infection and host immunity contributes to multiple diseases. Cystic fibrosis (CF) is a classical example of this phenomenon, wherein a dysfunctional, hyperinflammatory immune response combined with chronic pulmonary infections wreak havoc upon the airway, leading to a disease course of substantial morbidity and shortened life span. Pseudomonas aeruginosa is an opportunistic pathogen that commonly infects the CF lung, promoting an accelerated decline of pulmonary function. Importantly, P. aeruginosa exhibits significant resistance to innate immune effectors and to antibiotics, in part, by expressing specific virulence factors (e.g., antioxidants and exopolysaccharides) and by acquiring adaptive mutations during chronic infection. In an effort to review our current understanding of the host-pathogen interface driving CF pulmonary disease, we discuss (i) the progression of disease within the primitive CF lung, specifically focusing on the role of host versus bacterial factors; (ii) critical, neutrophil-derived innate immune effectors that are implicated in CF pulmonary disease, including reactive oxygen species (ROS) and antimicrobial peptides (e.g., LL-37); (iii) P. aeruginosa virulence factors and adaptive mutations that enable evasion of the host response; and (iv) ongoing work examining the distribution and colocalization of host and bacterial factors within distinct anatomical niches of the CF lung.
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Affiliation(s)
- Sankalp Malhotra
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, USA
- The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Don Hayes
- The Ohio State University College of Medicine, Columbus, Ohio, USA
- Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
- Section of Pulmonary Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Daniel J Wozniak
- The Ohio State University College of Medicine, Columbus, Ohio, USA
- Section of Pulmonary Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
- Department of Microbiology, The Ohio State University, Columbus, Ohio, USA
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221
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Fu TK, Ng SK, Chen YE, Lee YC, Demeter F, Herczeg M, Borbás A, Chiu CH, Lan CY, Chen CL, Chang MDT. Rhamnose Binding Protein as an Anti-Bacterial Agent-Targeting Biofilm of Pseudomonas aeruginosa. Mar Drugs 2019; 17:md17060355. [PMID: 31207891 PMCID: PMC6628293 DOI: 10.3390/md17060355] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 01/14/2023] Open
Abstract
More than 80% of infectious bacteria form biofilm, which is a bacterial cell community surrounded by secreted polysaccharides, proteins and glycolipids. Such bacterial superstructure increases resistance to antimicrobials and host defenses. Thus, to control these biofilm-forming pathogenic bacteria requires antimicrobial agents with novel mechanisms or properties. Pseudomonas aeruginosa, a Gram-negative opportunistic nosocomial pathogen, is a model strain to study biofilm development and correlation between biofilm formation and infection. In this study, a recombinant hemolymph plasma lectin (rHPLOE) cloned from Taiwanese Tachypleus tridentatus was expressed in an Escherichia coli system. This rHPLOE was shown to have the following properties: (1) Binding to P. aeruginosa PA14 biofilm through a unique molecular interaction with rhamnose-containing moieties on bacteria, leading to reduction of extracellular di-rhamnolipid (a biofilm regulator); (2) decreasing downstream quorum sensing factors, and inhibiting biofilm formation; (3) dispersing the mature biofilm of P. aeruginosa PA14 to improve the efficacies of antibiotics; (4) reducing P. aeruginosa PA14 cytotoxicity to human lung epithelial cells in vitro and (5) inhibiting P. aeruginosa PA14 infection of zebrafish embryos in vivo. Taken together, rHPLOE serves as an anti-biofilm agent with a novel mechanism of recognizing rhamnose moieties in lipopolysaccharides, di-rhamnolipid and structural polysaccharides (Psl) in biofilms. Thus rHPLOE links glycan-recognition to novel anti-biofilm strategies against pathogenic bacteria.
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Affiliation(s)
- Tse-Kai Fu
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan.
- Simpson Biotech Co., Ltd., Taoyuan 333, Taiwan.
| | - Sim-Kun Ng
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Yi-En Chen
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Yuan-Chuan Lee
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan.
- Department of Biology, Johns Hopkins University, Baltimore, ML 21218, USA.
| | - Fruzsina Demeter
- Department of Pharmaceutical Chemistry, University of Debrecen, Debrecen 4032, Hungary (F.D.).
| | - Mihály Herczeg
- Department of Pharmaceutical Chemistry, University of Debrecen, Debrecen 4032, Hungary (F.D.).
| | - Anikó Borbás
- Department of Pharmaceutical Chemistry, University of Debrecen, Debrecen 4032, Hungary (F.D.).
| | - Cheng-Hsun Chiu
- Department of Life Science, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Chung-Yu Lan
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan.
- Department of Life Science, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Chyi-Liang Chen
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan 333, Taiwan.
| | - Margaret Dah-Tsyr Chang
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan.
- Department of Life Science, National Tsing Hua University, Hsinchu 30013, Taiwan.
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222
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Casciaro B, Lin Q, Afonin S, Loffredo MR, de Turris V, Middel V, Ulrich AS, Di YP, Mangoni ML. Inhibition of Pseudomonas aeruginosa biofilm formation and expression of virulence genes by selective epimerization in the peptide Esculentin-1a(1-21)NH 2. FEBS J 2019; 286:3874-3891. [PMID: 31144441 DOI: 10.1111/febs.14940] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 03/22/2019] [Accepted: 05/28/2019] [Indexed: 12/21/2022]
Abstract
Pseudomonas aeruginosa is a pathogenic bacterium known to cause serious human infections, especially in immune-compromised patients. This is due to its unique ability to transform from a drug-tolerant planktonic to a more dangerous and treatment-resistant sessile life form, called biofilm. Recently, two derivatives of the frog skin antimicrobial peptide esculentin-1a, i.e. Esc(1-21) and its D-amino acids containing diastereomer Esc(1-21)-1c, were characterized for their powerful anti-Pseudomonal activity against both forms. Prevention of biofilm formation already in its early stages could be even more advantageous for counteracting infections induced by this bacterium. In this work, we studied how the diastereomer Esc(1-21)-1c can inhibit Pseudomonas biofilm formation in comparison to the parent peptide and two clinically-used conventional antibiotics, i.e. colistin and aztreonam, when applied at dosages below the minimal growth inhibitory concentration. Biofilm prevention was correlated to the peptides' ability to inhibit Pseudomonas motility and to reduce the production of virulent metabolites, for example, pyoverdine and rhamnolipids. Furthermore, the molecular mechanism underlying these activities was evaluated by studying the peptides' effect on the expression of key genes involved in the virulence and motility of bacteria, as well as by monitoring the peptides' binding to the bacterial signaling nucleotide ppGpp. Our results demonstrate that the presence of only two D-amino acids in Esc(1-21)-1c is sufficient to downregulate ppGpp-mediated expression of biofilm-associated genes, presumably as a result of higher peptide stability and therefore prolonged interaction with the nucleotide. Overall, these studies should assist efficient design and optimization of new anti-infective agents with multiple pharmacologically beneficial properties.
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Affiliation(s)
- Bruno Casciaro
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Italy.,Center for Life Nano Science, Istituto Italiano di Tecnologia, Rome, Italy
| | - Qiao Lin
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sergii Afonin
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Maria Rosa Loffredo
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Italy
| | - Valeria de Turris
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Rome, Italy
| | - Volker Middel
- Institute of Toxicology and Genetics (ITG), KIT, Karlsruhe, Germany
| | - Anne S Ulrich
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany.,Institute of Organic Chemistry, KIT, Karlsruhe, Germany
| | - YuanPu Peter Di
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Maria Luisa Mangoni
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Italy
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223
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Rivera MLC, Hassimotto NMA, Bueris V, Sircili MP, de Almeida FA, Pinto UM. Effect of Capsicum Frutescens Extract, Capsaicin, and Luteolin on Quorum Sensing Regulated Phenotypes. J Food Sci 2019; 84:1477-1486. [PMID: 31132155 DOI: 10.1111/1750-3841.14648] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 04/09/2019] [Accepted: 04/12/2019] [Indexed: 01/04/2023]
Abstract
Capsicum peppers have not been investigated as sources of quorum sensing (QS) inhibitors. This study aimed to identify compounds in pimenta-malagueta (Capsicum frutescens) and red pepper (Capsicum annuum) extracts and to evaluate their effect on violacein production in Chromobacterium violaceum ATCC 12472 and C. violaceum CV026, as well as biofilm formation (BF) in Pseudomonas aeruginosa PAO1 and Serratia marcescens MG1. Among the extracts, pimenta-malagueta methanolic extract (PMME) was chosen because it contained capsaicin, dihydrocapsaicin, and luteolin in greater amount than the other extracts. In general, PMME partially inhibited bacterial growth at 2.5 and 5.0 mg/mL, as well as capsaicin at 100 µg/mL and luteolin at 62.5, 125, and 250 µg/mL. At lower concentrations, PMME and luteolin reduced violacein production in C. violaceum ATCC 12472 without affecting growth, a result that was not observed with capsaicin. We show that violacein inhibition by PMME is likely due to luteolin. In silico docking evaluation showed that luteolin binds to the CviR QS regulator. Crystal violet staining and confocal microscopy revealed that BF was increased by PMME and capsaicin, being remarkably superior for P. aeruginosa PAO1 at 30 °C. Capsaicin is not an effective QS inhibitor, while luteolin should be further investigated for its potential effects in QS regulated phenotypes. PRACTICAL APPLICATION: Quorum sensing (QS) is a form of bacterial communication targeted for studies aiming to inhibit bacterial virulence. QS regulates phenotypes that influence microbial activities across many areas, including Food Science. Capsicum frutescens is a type of chili pepper consumed in Brazil, rich in bioactive compounds such as capsaicin (which gives its pungency) and luteolin (a phenolic compound). We show that C. frutescens extract and luteolin inhibit QS in a model bacterium, along with the possible molecular mechanism of inhibition. Capsaicin did not inhibit QS neither biofilm formation. Luteolin should be further investigated for its QS inhibition properties and biotechnological applications.
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Affiliation(s)
- Milagros Liseth Castillo Rivera
- Food Research Center, Dept. of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, Univ. of Sao Paulo, Av. Prof. Lineu Prestes 580, B.14, 05508-000, Sao Paulo, Brazil
| | - Neuza Mariko Aymoto Hassimotto
- Food Research Center, Dept. of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, Univ. of Sao Paulo, Av. Prof. Lineu Prestes 580, B.14, 05508-000, Sao Paulo, Brazil
| | - Vanessa Bueris
- Laboratory of Resistome and Therapeutic Alternatives, Inst. of Biomedical Sciences , Univ. of Sao Paulo, Av. Prof. Lineu Prestes 2415, 05508-900, Sao Paulo, Brazil.,Laboratory of Genetics, Butantan Institute, Av. Vital Brasil 1500, 05503-900, Sao Paulo, Brazil
| | - Marcelo Palma Sircili
- Laboratory of Genetics, Butantan Institute, Av. Vital Brasil 1500, 05503-900, Sao Paulo, Brazil
| | - Felipe Alves de Almeida
- Dept. of Nutrition, Federal Univ. of Juiz de Fora, Rua Manoel Byrro 241, 35032-620, Governador Valadares, Brazil
| | - Uelinton Manoel Pinto
- Food Research Center, Dept. of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, Univ. of Sao Paulo, Av. Prof. Lineu Prestes 580, B.14, 05508-000, Sao Paulo, Brazil
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224
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Zhao W, Cross AR, Crowe‐McAuliffe C, Weigert‐Munoz A, Csatary EE, Solinski AE, Krysiak J, Goldberg JB, Wilson DN, Medina E, Wuest WM, Sieber SA. Der Naturstoff Elegaphenon verstärkt antibiotische Effekte gegen
Pseudomonas aeruginosa. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Weining Zhao
- Fakultät für ChemieCenter for Integrated Protein Science Munich (CIPSM)Technische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Ashley R. Cross
- Division of Pulmonary, Allergy & Immunology, Cystic Fibrosis and SleepDepartment of PediatricsEmory University School of Medicine Atlanta GA USA
- Microbiology and Molecular Genetics ProgramGraduate Division of Biological and Biomedical SciencesEmory University Atlanta GA USA
- Emory+Children's Center for Cystic Fibrosis and Airway Disease ResearchEmory University School of Medicine Atlanta GA USA
| | | | - Angela Weigert‐Munoz
- Fakultät für ChemieCenter for Integrated Protein Science Munich (CIPSM)Technische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | | | | | - Joanna Krysiak
- Fakultät für ChemieCenter for Integrated Protein Science Munich (CIPSM)Technische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Joanna B. Goldberg
- Division of Pulmonary, Allergy & Immunology, Cystic Fibrosis and SleepDepartment of PediatricsEmory University School of Medicine Atlanta GA USA
- Emory+Children's Center for Cystic Fibrosis and Airway Disease ResearchEmory University School of Medicine Atlanta GA USA
- Emory Antibiotic Resistance CenterEmory University Atlanta GA USA
| | - Daniel N. Wilson
- Institut für Biochemie und MolekularbiologieUniversität Hamburg 20146 Hamburg Deutschland
| | - Eva Medina
- Helmholtz Zentrum für Infektionsforschung Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - William M. Wuest
- Emory+Children's Center for Cystic Fibrosis and Airway Disease ResearchEmory University School of Medicine Atlanta GA USA
- Department of ChemistryEmory University Atlanta GA USA
- Emory Antibiotic Resistance CenterEmory University Atlanta GA USA
| | - Stephan A. Sieber
- Fakultät für ChemieCenter for Integrated Protein Science Munich (CIPSM)Technische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
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225
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Zhao W, Cross AR, Crowe-McAuliffe C, Weigert-Munoz A, Csatary EE, Solinski AE, Krysiak J, Goldberg JB, Wilson DN, Medina E, Wuest WM, Sieber SA. The Natural Product Elegaphenone Potentiates Antibiotic Effects against Pseudomonas aeruginosa. Angew Chem Int Ed Engl 2019; 58:8581-8584. [PMID: 30969469 DOI: 10.1002/anie.201903472] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Indexed: 12/19/2022]
Abstract
Natural products represent a rich source of antibiotics that address versatile cellular targets. The deconvolution of their targets via chemical proteomics is often challenged by the introduction of large photocrosslinkers. Here we applied elegaphenone, a largely uncharacterized natural product antibiotic bearing a native benzophenone core scaffold, for affinity-based protein profiling (AfBPP) in Gram-positive and Gram-negative bacteria. This study utilizes the alkynylated natural product scaffold as a probe to uncover intriguing biological interactions with the transcriptional regulator AlgP. Furthermore, proteome profiling of a Pseudomonas aeruginosa AlgP transposon mutant provided unique insights into the mode of action. Elegaphenone enhanced the elimination of intracellular P. aeruginosa in macrophages exposed to sub-inhibitory concentrations of the fluoroquinolone antibiotic norfloxacin.
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Affiliation(s)
- Weining Zhao
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Ashley R Cross
- Division of Pulmonary, Allergy & Immunology, Cystic Fibrosis and Sleep, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA.,Microbiology and Molecular Genetics Program, Graduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, GA, USA.,Emory+Children's Center for Cystic Fibrosis and Airway Disease Research, Emory University School of Medicine, Atlanta, GA, USA
| | - Caillan Crowe-McAuliffe
- Institute for Biochemistry and Molecular Biology, University of Hamburg, 20146, Hamburg, Germany
| | - Angela Weigert-Munoz
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | | | - Amy E Solinski
- Department of Chemistry, Emory University, Atlanta, GA, USA
| | - Joanna Krysiak
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Joanna B Goldberg
- Division of Pulmonary, Allergy & Immunology, Cystic Fibrosis and Sleep, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA.,Emory+Children's Center for Cystic Fibrosis and Airway Disease Research, Emory University School of Medicine, Atlanta, GA, USA.,Emory Antibiotic Resistance Center, Emory University, Atlanta, GA, USA
| | - Daniel N Wilson
- Institute for Biochemistry and Molecular Biology, University of Hamburg, 20146, Hamburg, Germany
| | - Eva Medina
- Helmholtz Center for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - William M Wuest
- Emory+Children's Center for Cystic Fibrosis and Airway Disease Research, Emory University School of Medicine, Atlanta, GA, USA.,Department of Chemistry, Emory University, Atlanta, GA, USA.,Emory Antibiotic Resistance Center, Emory University, Atlanta, GA, USA
| | - Stephan A Sieber
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
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226
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Mgbeahuruike EE, Stålnacke M, Vuorela H, Holm Y. Antimicrobial and Synergistic Effects of Commercial Piperine and Piperlongumine in Combination with Conventional Antimicrobials. Antibiotics (Basel) 2019; 8:E55. [PMID: 31060239 PMCID: PMC6627571 DOI: 10.3390/antibiotics8020055] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 01/08/2023] Open
Abstract
Microbial resistance to currently available antibiotics is a public health problem in the fight against infectious diseases. Most antibiotics are characterized by numerous side effects that may be harmful to normal body cells. To improve the efficacy of these antibiotics and to find an alternative way to minimize the adverse effects associated with most conventional antibiotics, piperine and piperlongumine were screened in combination with conventional rifampicin, tetracycline, and itraconazole to evaluate their synergistic, additive, or antagonistic interactions against Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans. The fractional inhibitory concentration index was used to estimate the synergistic effects of various combination ratios of the piperamides and antibiotics against the bacterial and fungal strains. Both piperine and piperlongumine showed synergistic effects against S. aureus when combined at various ratios with rifampicin. Synergistic interaction was also observed with piperine in combination with tetracycline against S. aureus, while antagonistic interaction was recorded for piperlongumine and tetracycline against S. aureus. All the piperamide/antibacterial combinations tested against P. aeruginosa showed antagonistic effects, with the exception of piperine and rifampicin, which recorded synergistic interaction at a ratio of 9:1 rifampicin/piperine. No synergistic interaction was observed when the commercial compounds were combined with itraconazole and tested against C. albicans. The results showed that piperine and piperlongumine are capable of improving the effectiveness of rifampicin and tetracycline. Dosage combinations of these bioactive compounds with the antibiotics used may be a better option for the treatment of bacterial infections that aims to minimize the adverse effects associated with the use of these conventional antibacterial drugs.
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Affiliation(s)
- Eunice Ego Mgbeahuruike
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland.
| | - Milla Stålnacke
- Department of Pharmacology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Box 431, SE-40530 Gothenburg, Sweden.
| | - Heikki Vuorela
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland.
| | - Yvonne Holm
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland.
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Mohan CC, Harini K, Sudharsan K, Krishnan KR, Sukumar M. Quorum quenching effect and kinetics of active compound from S. aromaticum and C. cassia fused packaging films in shelf life of chicken meat. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.01.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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228
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Bhagirath AY, Li Y, Patidar R, Yerex K, Ma X, Kumar A, Duan K. Two Component Regulatory Systems and Antibiotic Resistance in Gram-Negative Pathogens. Int J Mol Sci 2019; 20:E1781. [PMID: 30974906 PMCID: PMC6480566 DOI: 10.3390/ijms20071781] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/05/2019] [Accepted: 04/08/2019] [Indexed: 12/17/2022] Open
Abstract
Gram-negative pathogens such as Klebsiella pneumoniae, Acinetobacter baumannii, and Pseudomonas aeruginosa are the leading cause of nosocomial infections throughout the world. One commonality shared among these pathogens is their ubiquitous presence, robust host-colonization and most importantly, resistance to antibiotics. A significant number of two-component systems (TCSs) exist in these pathogens, which are involved in regulation of gene expression in response to environmental signals such as antibiotic exposure. While the development of antimicrobial resistance is a complex phenomenon, it has been shown that TCSs are involved in sensing antibiotics and regulating genes associated with antibiotic resistance. In this review, we aim to interpret current knowledge about the signaling mechanisms of TCSs in these three pathogenic bacteria. We further attempt to answer questions about the role of TCSs in antimicrobial resistance. We will also briefly discuss how specific two-component systems present in K. pneumoniae, A. baumannii, and P. aeruginosa may serve as potential therapeutic targets.
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Affiliation(s)
- Anjali Y Bhagirath
- Department of Oral Biology, Rady Faculty of Health Sciences, University of Manitoba, 780 Bannatyne Ave, Winnipeg, MB R3E 0J9, Canada.
| | - Yanqi Li
- Department of Oral Biology, Rady Faculty of Health Sciences, University of Manitoba, 780 Bannatyne Ave, Winnipeg, MB R3E 0J9, Canada.
| | - Rakesh Patidar
- Department of Microbiology, Faculty of Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada.
| | - Katherine Yerex
- Department of Oral Biology, Rady Faculty of Health Sciences, University of Manitoba, 780 Bannatyne Ave, Winnipeg, MB R3E 0J9, Canada.
| | - Xiaoxue Ma
- Department of Oral Biology, Rady Faculty of Health Sciences, University of Manitoba, 780 Bannatyne Ave, Winnipeg, MB R3E 0J9, Canada.
| | - Ayush Kumar
- Department of Microbiology, Faculty of Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada.
| | - Kangmin Duan
- Department of Oral Biology, Rady Faculty of Health Sciences, University of Manitoba, 780 Bannatyne Ave, Winnipeg, MB R3E 0J9, Canada.
- Department of Medical Microbiology & Infectious Diseases, Rady Faculty of Health Sciences, University of Manitoba, 780 Bannatyne Ave, Winnipeg, MB R3E 0J9, Canada.
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Bezek K, Nipič D, Torkar KG, Oder M, Dražić G, Abram A, Žibert J, Raspor P, Bohinc K. Biofouling of stainless steel surfaces by four common pathogens: the effects of glucose concentration, temperature and surface roughness. BIOFOULING 2019; 35:273-283. [PMID: 31025585 DOI: 10.1080/08927014.2019.1575959] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 01/18/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
There is a wide range of factors affecting bacterial adhesion and biofilm formation. However, in both food processing and medical settings, it is very hard to obtain suitably controlled conditions so that the factors that reduce surface colonisation and biofouling can be studied. The aim of this study was to evaluate the effect of glucose concentration, temperature and stainless steel (SS) surface roughness on biofouling by four common pathogens (Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and L. monocytogenes). Among the tested variables, the untreated SS surface (3C) was shown to be fouled more than 3D polished, brushed or electropolished SS surfaces. Although an array of parameters influenced biofouling, the most promising control measure was the influence of low temperature (4 °C) that reduced biofouling even in the case of the psychrophilic Listeria monocytogenes. The study findings could significantly contribute to the prevention of SS surface contamination and consequential biofouling by food and healthcare associated pathogens.
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Affiliation(s)
- Katja Bezek
- a Faculty of Health Sciences , University of Primorska , Izola , Slovenia
| | - Damjan Nipič
- b Faculty of Health Sciences , University of Ljubljana , Ljubljana , Slovenia
| | - Karmen Godič Torkar
- b Faculty of Health Sciences , University of Ljubljana , Ljubljana , Slovenia
| | - Martina Oder
- b Faculty of Health Sciences , University of Ljubljana , Ljubljana , Slovenia
| | - Goran Dražić
- c Department of materials chemistry, National Institute of Chemistry , Ljubljana , Slovenia
| | - Anže Abram
- d Department for nanostructured materials, Jozef Stefan Institute , Ljubljana , Slovenia
| | - Janez Žibert
- b Faculty of Health Sciences , University of Ljubljana , Ljubljana , Slovenia
| | - Peter Raspor
- e Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana , Ljubljana , Slovenia
| | - Klemen Bohinc
- b Faculty of Health Sciences , University of Ljubljana , Ljubljana , Slovenia
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Wu MC, Liao CW, Lin ZH, Yang CM, Cheng YP, Wu JS. Experimental investigation of sterilization efficacy of green nails symptom and gray nails using an argon-based round atmospheric-pressure plasma jet. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/aaff18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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231
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Isolation and characterization of a bacteriophage and its potential to disrupt multi-drug resistant Pseudomonas aeruginosa biofilms. Microb Pathog 2019; 128:329-336. [PMID: 30682523 DOI: 10.1016/j.micpath.2019.01.032] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 01/15/2019] [Accepted: 01/18/2019] [Indexed: 12/15/2022]
Abstract
A lytic Pseudomonas aeruginosa bacteriophage, vB_PaeM_LS1, was isolated and characterized herein. To examine the eligibility of bacteriophage vB_PaeM_LS1 as a therapeutic bacteriophage, we analysed its genome and compared it to similar bacteriophages. Genome of bacteriophage vB_PaeM_LS1 consisted of a linear, double-stranded DNA molecule 66,095 bp in length and with 55.7% G + C content. Neighbor-joining analysis of the large subunit terminase showed that bacteriophage vB_PaeM_LS1 had similarity to the Pbunavirus genus. The potential of the lytic bacteriophage to disrupt Pseudomonas aeruginosa biofilms was assessed by scanning electron microscopy and bacterial counts. This study revealed that the bacteriophage vB_PaeM_LS1 with its lytic effect showed a high potential impact on the inhibition of the growth of Pseudomonas aeruginosa biofilm formation.
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232
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Bahramian A, Khoshnood S, Shariati A, Doustdar F, Chirani AS, Heidary M. Molecular characterization of the pilS2 gene and its association with the frequency of Pseudomonas aeruginosa plasmid pKLC102 and PAPI-1 pathogenicity island. Infect Drug Resist 2019; 12:221-227. [PMID: 30666137 PMCID: PMC6333160 DOI: 10.2147/idr.s188527] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Pseudomonas aeruginosa is the most common opportunistic pathogen associated with a broad range of infections, including cystic fibrosis, ocular, otitis media, and burn infections. The aim of this study was to show the frequency of the pilS2 gene, and its association with P. aeruginosa plasmid pKLC102 and PAPI-1 pathogenicity island among P. aeruginosa strains. METHODS The samples were collected from patients with cystic fibrosis, ocular, otitis media, and burn infections between January 2016 and November 2017. DNA was extracted using the DNA extraction kit and was used for PCR assay. PCR with 4 primer-pairs including 976 F/PAPI-1R, 4542 F/intF, SojR/4541 F, and intF/sojR was performed to identify PAPI-1. pKLC102 was detected using three other primer-pairs including cp10F/cp10R, cp44F/cp44R, and cp97F/cp97R. RESULTS A total of 112 P. aeruginosa isolates were collected from patients with cystic fibrosis (36), burn (20), otitis media (26), and ocular (30) infections. The results of PCR showed that pilS2 gene was identified in 96 (85%) strains. PAPI-1-attB integration was detected among 38 (33.9%) isolates and the circular form of PAPI-1 detected among 17 (14%) isolates. In addition, 79 (70.5%) strains were found to be positive for pKLC102. CONCLUSION We found that the majority of the isolates may be susceptible to transfer this significant island and the related element pKLC102 into recipient isolates lacking the island owing to high association of the PilS2 pilus with the islands in the studied strains. It is anticipated that strains isolated from burn and eye with the highest rate of PilS2, PAPI-1, and pKLC102 association have a high level of antibiotic resistance.
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Affiliation(s)
- Aghil Bahramian
- Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Khoshnood
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran,
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran,
| | - Aref Shariati
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farahnoosh Doustdar
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Salimi Chirani
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohsen Heidary
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Student Research Committee, School of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
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233
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Feng R, Xu M, Li J, Huang S, Zhao G, Tu X, Sun G, Guo J. Structure and predictive functional profiling of microbial communities in two biotrickling filters treated with continuous/discontinuous waste gases. AMB Express 2019; 9:2. [PMID: 30610394 PMCID: PMC6320331 DOI: 10.1186/s13568-018-0726-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 12/24/2018] [Indexed: 01/06/2023] Open
Abstract
Two biotrickling filters were operated in continuous (BTF1) and discontinuous (BTF2) modes at a constant empty bed residence time of 60 s for 60 days. From day 60, the operation mode of each BTF was oppositely switched. Higher removal efficiencies of five aromatic pollutants were recorded with BTF1 (> 77.2%). The switch in the operation mode did not alter the removal performance of BTF1. Comparatively, BTF2 was not successfully acclimated in the discontinuous operation mode. Once the mode had been switched to continuous mode, the removal efficiencies of BTF2 on all pollutants increased drastically and finally exceeded the values observed in BTF1, with the single exception of p-xylene. Principle coordinate analysis and analysis of similarities (ANOSIM) showed that the structure of the microbial communities differed considerably between both BTFs (R = 1.000, p < 0.01) as well as before and after the switch in BTF2 (R = 0.996, p < 0.01). The random forest model demonstrated that Mycobacterium, Burkholderia, and Comamonas were the three most important bacterial genera contributing to the differences in microbial communities between the two BTFs. Metagenomics inferred by PICUSt (phylogenetic investigation of communities by reconstruction of unobserved states) indicated that BTF2 had high degradation potential for aromatic pollutants, although those genes involved in biofilm formation were less active in BTF2 than those in BTF1.
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234
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Banerjee D, Shivapriya PM, Gautam PK, Misra K, Sahoo AK, Samanta SK. A Review on Basic Biology of Bacterial Biofilm Infections and Their Treatments by Nanotechnology-Based Approaches. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40011-018-01065-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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235
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Shah MD, Kharkar PS, Sahu NU, Peerzada Z, Desai KB. Potassium 2-methoxy-4-vinylphenolate: a novel hit exhibiting quorum-sensing inhibition in Pseudomonas aeruginosa viaLasIR/RhlIR circuitry. RSC Adv 2019; 9:40228-40239. [PMID: 35542690 PMCID: PMC9076179 DOI: 10.1039/c9ra06612h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 12/18/2019] [Accepted: 11/19/2019] [Indexed: 02/05/2023] Open
Abstract
Effect of potassium 2-methoxy-4-vinylphenolate on quorum sensing inPseudomonas aeruginosa.
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Affiliation(s)
- Mayank D. Shah
- Sunandan Divatia School of Science
- SVKM's NMIMS (Deemed to be University)
- Mumbai
- India
| | - Prashant S. Kharkar
- Institute of Chemical Technology
- Category I Deemed to be University (MHRD/UGC)
- Mumbai-400019
- India
| | - Niteshkumar U. Sahu
- Institute of Chemical Technology
- Category I Deemed to be University (MHRD/UGC)
- Mumbai-400019
- India
| | - Zoya Peerzada
- Sunandan Divatia School of Science
- SVKM's NMIMS (Deemed to be University)
- Mumbai
- India
| | - Krutika B. Desai
- Mithibai College of Arts & Science & Amrutben Jivanlal College of Commerce & Economics
- Mumbai
- India
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Shah S, Gaikwad S, Nagar S, Kulshrestha S, Vaidya V, Nawani N, Pawar S. Biofilm inhibition and anti-quorum sensing activity of phytosynthesized silver nanoparticles against the nosocomial pathogen Pseudomonas aeruginosa. BIOFOULING 2019; 35:34-49. [PMID: 30727758 DOI: 10.1080/08927014.2018.1563686] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Quorum sensing (QS), the communication signaling network, regulates biofilm formation and several virulence factors in Pseudomonas aeruginosa PAO1, a nosocomial opportunistic pathogen. QS is considered to be a challenging target for compounds antagonistic to virulent factors. Biologically synthesized silver nanoparticles (AgNPs) are reported as anti-QS and anti-biofilm drugs against bacterial infections. The present study reports on the synthesis and characterization of Piper betle (Pb) mediated AgNPs (Pb-AgNPs). The anti-QS activity of Pb-AgNPs against Chromobacterium violaceum and the potential effect of Pb-AgNPs on QS-regulated phenotypes in PAO1 were studied. FTIR analysis exhibited that Pb-AgNPs had been capped by phytochemical constituents of Pb. Eugenol is one of the active phenolic phytochemicals in Pb leaves, therefore molecular docking of eugenol-conjugated AgNPs on QS regulator proteins (LasR, LasI and MvfR) was performed. Eugenol-conjugated AgNPs showed considerable binding interactions with QS-associated proteins. These results provide novel insights into the development of phytochemically conjugated nanoparticles as promising anti-infective candidates.
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Affiliation(s)
- Saloni Shah
- a Microbial Diversity Research Centre , Dr. D. Y. Patil Biotechnology and Bioinformatics Institute , Dr. D. Y. Patil Vidyapeeth , Pune , India
| | - Swapnil Gaikwad
- a Microbial Diversity Research Centre , Dr. D. Y. Patil Biotechnology and Bioinformatics Institute , Dr. D. Y. Patil Vidyapeeth , Pune , India
| | - Shuchi Nagar
- b Bioinformatics Research Laboratory , Dr. D. Y. Patil Biotechnology and Bioinformatics Institute , Dr. D. Y. Patil Vidyapeeth , Pune , India
| | - Shatavari Kulshrestha
- a Microbial Diversity Research Centre , Dr. D. Y. Patil Biotechnology and Bioinformatics Institute , Dr. D. Y. Patil Vidyapeeth , Pune , India
| | - Viniti Vaidya
- a Microbial Diversity Research Centre , Dr. D. Y. Patil Biotechnology and Bioinformatics Institute , Dr. D. Y. Patil Vidyapeeth , Pune , India
| | - Neelu Nawani
- a Microbial Diversity Research Centre , Dr. D. Y. Patil Biotechnology and Bioinformatics Institute , Dr. D. Y. Patil Vidyapeeth , Pune , India
| | - Sarika Pawar
- a Microbial Diversity Research Centre , Dr. D. Y. Patil Biotechnology and Bioinformatics Institute , Dr. D. Y. Patil Vidyapeeth , Pune , India
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Pereira LAS, Oliveira MMMD, Martins HHDA, Vale LAD, Isidoro SR, Botrel DA, Piccoli RH. Sanitizing cinnamaldehyde solutions against Pseudomonas aeruginosa biofilms formed on stainless steel surfaces. BRAZILIAN JOURNAL OF FOOD TECHNOLOGY 2019. [DOI: 10.1590/1981-6723.14418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abstract Pseudomonas aeruginosa is an opportunistic pathogen capable of forming biofilms of great relevance to medical microbiology and the food industry. Essential oil (EOs) constituents have been researched as new strategies for the control of biofilms. In the present study cinnamaldehyde was shown to be an effective EO against the planktonic cells of P. aeruginosa strains (p < 0.05). Thus it was used to prepare sanitizing solutions, which were tested against P. aeruginosa biofilms formed on stainless steel surfaces. Cinnamaldehyde showed antibacterial activity against sessile P. aeruginosa cells (p < 0.05). A 100% (5.87 log-reduction) elimination of viable bacterial cells was obtained after treatment with a 6xMIC (0.06% Minimal Inhibitory Concentration) solution for the strain ATCC 9027. Sanitizing cinnamaldehyde solutions can be used as new alternatives to control such microbial sessile communities in food industries.
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238
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Evaluation of two novel biofilm-specific antibiotic resistance genes in clinical Pseudomonas aeruginosa isolates. GENE REPORTS 2018. [DOI: 10.1016/j.genrep.2018.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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239
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Biofilm Inhibition: Compounds with Antibacterial Effects. JOURNAL OF INTERDISCIPLINARY MEDICINE 2018. [DOI: 10.2478/jim-2018-0042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Biofilms can form on living or inert surfaces and prevail in natural, industrial, and hospital environments. They are made of bacteria organized in a coordinated functional community. Biofilms do not respond to antibiotic treatment due to multiple mechanisms of tolerance and resistance. If bacteria are coordinated in a biofilm form, they are significantly less susceptible to antibiotics, thus making the therapeutic approach difficult. The possibility of using drugs aimed at inhibiting the formation of biofilms in combination with current antibiotics is a therapeutic approach with a major potential for this type of persistent bacterial infection. This bibliographic study aims to present the main compounds that act by inhibiting or destroying the bacterial biofilm.
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240
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Pang Z, Raudonis R, Glick BR, Lin TJ, Cheng Z. Antibiotic resistance in Pseudomonas aeruginosa: mechanisms and alternative therapeutic strategies. Biotechnol Adv 2018; 37:177-192. [PMID: 30500353 DOI: 10.1016/j.biotechadv.2018.11.013] [Citation(s) in RCA: 986] [Impact Index Per Article: 164.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/21/2018] [Accepted: 11/24/2018] [Indexed: 01/09/2023]
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that is a leading cause of morbidity and mortality in cystic fibrosis patients and immunocompromised individuals. Eradication of P. aeruginosa has become increasingly difficult due to its remarkable capacity to resist antibiotics. Strains of Pseudomonas aeruginosa are known to utilize their high levels of intrinsic and acquired resistance mechanisms to counter most antibiotics. In addition, adaptive antibiotic resistance of P. aeruginosa is a recently characterized mechanism, which includes biofilm-mediated resistance and formation of multidrug-tolerant persister cells, and is responsible for recalcitrance and relapse of infections. The discovery and development of alternative therapeutic strategies that present novel avenues against P. aeruginosa infections are increasingly demanded and gaining more and more attention. Although mostly at the preclinical stages, many recent studies have reported several innovative therapeutic technologies that have demonstrated pronounced effectiveness in fighting against drug-resistant P. aeruginosa strains. This review highlights the mechanisms of antibiotic resistance in P. aeruginosa and discusses the current state of some novel therapeutic approaches for treatment of P. aeruginosa infections that can be further explored in clinical practice.
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Affiliation(s)
- Zheng Pang
- Department of Pathology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Renee Raudonis
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Bernard R Glick
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Tong-Jun Lin
- Department of Pathology, Dalhousie University, Halifax, NS B3H 4R2, Canada; Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada; Department of Pediatrics, IWK Health Centre, Halifax, NS B3K 6R8, Canada
| | - Zhenyu Cheng
- Department of Pathology, Dalhousie University, Halifax, NS B3H 4R2, Canada; Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
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Kumar SS, Tandberg JI, Penesyan A, Elbourne LDH, Suarez-Bosche N, Don E, Skadberg E, Fenaroli F, Cole N, Winther-Larsen HC, Paulsen IT. Dual Transcriptomics of Host-Pathogen Interaction of Cystic Fibrosis Isolate Pseudomonas aeruginosa PASS1 With Zebrafish. Front Cell Infect Microbiol 2018; 8:406. [PMID: 30524971 PMCID: PMC6262203 DOI: 10.3389/fcimb.2018.00406] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 10/29/2018] [Indexed: 01/09/2023] Open
Abstract
Pseudomonas aeruginosa is a significant cause of mortality in patients with cystic fibrosis (CF). To explore the interaction of the CF isolate P. aeruginosa PASS1 with the innate immune response, we have used Danio rerio (zebrafish) as an infection model. Confocal laser scanning microscopy (CLSM) enabled visualization of direct interactions between zebrafish macrophages and P. aeruginosa PASS1. Dual RNA-sequencing of host-pathogen was undertaken to profile RNA expression simultaneously in the pathogen and the host during P. aeruginosa infection. Following establishment of infection in zebrafish embryos with PASS1, 3 days post infection (dpi), there were 6739 genes found to be significantly differentially expressed in zebrafish and 176 genes in PASS1. A range of virulence genes were upregulated in PASS1, including genes encoding pyoverdine biosynthesis, flagellin, non-hemolytic phospholipase C, proteases, superoxide dismutase and fimbrial subunits. Additionally, iron and phosphate acquisition genes were upregulated in PASS1 cells in the zebrafish. Transcriptional changes in the host immune response genes highlighted phagocytosis as a key response mechanism to PASS1 infection. Transcriptional regulators of neutrophil and macrophage phagocytosis were upregulated alongside transcriptional regulators governing response to tissue injury, infection, and inflammation. The zebrafish host showed significant downregulation of the ribosomal RNAs and other genes involved in translation, suggesting that protein translation in the host is affected by PASS1 infection.
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Affiliation(s)
- Sheemal S Kumar
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, Australia
| | - Julia I Tandberg
- Department of Pharmaceutical Biosciences, Centre of Integrative Microbial Evolution, School of Pharmacy, University of Oslo, Oslo, Norway
| | - Anahit Penesyan
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, Australia
| | - Liam D H Elbourne
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, Australia
| | - Nadia Suarez-Bosche
- Microscopy Unit, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, Australia
| | - Emily Don
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia
| | - Eline Skadberg
- Department of Pharmaceutical Biosciences, Centre of Integrative Microbial Evolution, School of Pharmacy, University of Oslo, Oslo, Norway
| | - Federico Fenaroli
- Department of Biosciences, The Faculty of Mathematic and Natural Sciences, University of Oslo, Oslo, Norway
| | - Nicholas Cole
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia
| | - Hanne Cecilie Winther-Larsen
- Department of Pharmaceutical Biosciences, Centre of Integrative Microbial Evolution, School of Pharmacy, University of Oslo, Oslo, Norway
| | - Ian T Paulsen
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, Australia
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Goel A, Meher MK, Gupta P, Gulati K, Pruthi V, Poluri KM. Microwave assisted κ-carrageenan capped silver nanocomposites for eradication of bacterial biofilms. Carbohydr Polym 2018; 206:854-862. [PMID: 30553393 DOI: 10.1016/j.carbpol.2018.11.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/08/2018] [Accepted: 11/11/2018] [Indexed: 12/12/2022]
Abstract
Maturation of bacterial biofilms and their resistance to recurrent antimicrobial agents results in convoluted infectious diseases. In the current study, kappa-Carrageenan (κ-Carrageenan/CRG), was used to formulate CRG-silver nanocomposites through a facile microwave green synthesis approach. CRG-Ag nanoparticles of size 50 ± 10 nm were obtained by using CRG as a reducing and stabilizing agent. CRG-Ag nanoparticles were highly effective against both S. aureus and P. aeruginosa mediated biofilms and acted as a broad spectrum antibacterial agent even after six months. CRG-Ag nanoparticles encapsulated in KCl cross-linked hydrogel also exhibited excellent thermal stability, and antimicrobial potency. All these results depict that CRG-Ag nanocomposites appear as a promising approach to eradicate bacterial biofilms in food packaging and biomedical applications.
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Affiliation(s)
- Apoorva Goel
- Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Mukesh Kumar Meher
- Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India; Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Payal Gupta
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Khushboo Gulati
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Vikas Pruthi
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Krishna Mohan Poluri
- Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India; Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India.
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243
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Liu L, Wu R, Zhang J, Li P. Overexpression of luxS Promotes Stress Resistance and Biofilm Formation of Lactobacillus paraplantarum L-ZS9 by Regulating the Expression of Multiple Genes. Front Microbiol 2018; 9:2628. [PMID: 30483223 PMCID: PMC6240686 DOI: 10.3389/fmicb.2018.02628] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 10/15/2018] [Indexed: 12/14/2022] Open
Abstract
Probiotics have evoked great interest in the past years for their beneficial effects. The aim of this study was to investigate whether luxS overexpression promotes the stress resistance of Lactobacillus paraplantarum L-ZS9. Here we show that overexpression of luxS gene increased the production of autoinducer-2 (AI-2, quorum sensing signal molecule) by L. paraplantarum L-ZS9. At the same time, overexpression of luxS promoted heat-, bile salt-resistance and biofilm formation of the strain. RNAseq results indicated that multiple genes encoding transporters, membrane proteins, and transcriptional regulator were regulated by luxS. These results reveal a new role for LuxS in promoting stress resistance and biofilm formation of probiotic starter.
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Affiliation(s)
- Lei Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China
| | - Ruiyun Wu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China
| | - Jinlan Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China
| | - Pinglan Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China
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244
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Alkaloid-Rich Crude Extracts, Fractions and Piperamide Alkaloids of Piper guineense Possess Promising Antibacterial Effects. Antibiotics (Basel) 2018; 7:antibiotics7040098. [PMID: 30423994 PMCID: PMC6316075 DOI: 10.3390/antibiotics7040098] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 11/01/2018] [Accepted: 11/06/2018] [Indexed: 11/17/2022] Open
Abstract
Piper guineense is a food and medicinal plant commonly used to treat infectious diseases in West-African traditional medicine. In a bid to identify new antibacterial compounds due to bacterial resistance to antibiotics, twelve extracts of P. guineense fruits and leaves, obtained by sequential extraction, as well as the piperine and piperlongumine commercial compounds were evaluated for antibacterial activity against human pathogenic bacteria. HPLC-DAD and UHPLC/Q-TOF MS analysis were conducted to characterize and identify the compounds present in the extracts with promising antibacterial activity. The extracts, with the exception of the hot water decoctions and macerations, contained piperamide alkaloids as their main constituents. Piperine, dihydropiperine, piperylin, dihydropiperylin or piperlonguminine, dihydropiperlonguminine, wisanine, dihydrowisanine and derivatives of piperine and piperidine were identified in a hexane extract of the leaf. In addition, some new piperamide alkaloids were identified, such as a piperine and a piperidine alkaloid derivative and two unknown piperamide alkaloids. To the best of our knowledge, there are no piperamides reported in the literature with similar UVλ absorption maxima and masses. A piperamide alkaloid-rich hexane leaf extract recorded the lowest MIC of 19 µg/mL against Sarcina sp. and gave promising growth inhibitory effects against S. aureus and E. aerogenes as well, inhibiting the growth of both bacteria with a MIC of 78 µg/mL. Moreover, this is the first report of the antibacterial activity of P. guineense extracts against Sarcina sp. and E. aerogenes. Marked growth inhibition was also obtained for chloroform extracts of the leaves and fruits against P. aeruginosa with a MIC value of 78 µg/mL. Piperine and piperlongumine were active against E. aerogenes, S. aureus, E. coli, S. enterica, P. mirabilis and B. cereus with MIC values ranging from 39–1250 µg/mL. Notably, the water extracts, which were almost devoid of piperamide alkaloids, were not active against the bacterial strains. Our results demonstrate that P. guineense contains antibacterial alkaloids that could be relevant for the discovery of new natural antibiotics.
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245
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The Inhibition Effect of Lactobacilli Against Growth and Biofilm Formation of Pseudomonas aeruginosa. Probiotics Antimicrob Proteins 2018; 10:34-42. [PMID: 28293865 DOI: 10.1007/s12602-017-9267-9] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The emergence of antibiotic-resistant and food-spoilage microorganisms has renewed efforts to identify safe and natural alternative agents of antibiotics such as probiotics. The aim of this study was the isolation of lactobacilli as potential probiotics from local dairy products with broad antibacterial and anti-biofilm activities against antibiotic-resistant strains of Pseudomonas aeruginosa and determination of their inhibition mechanism. Antibiotic susceptibility and classification of acquired resistance profiles of 80 P. aeruginosa strains were determined based on Centers for Disease Control and Prevention (CDC) new definition as multidrug-resistant (MDR), extensively drug-resistant (XDR), and pan-drug-resistant (PDR) followed by antibacterial assessment of lactobacilli against them by different methods. Among the 80 P. aeruginosa strains, 1 (1.3%), 50 (62.5%), and 78 (97.5%) were PDR, XDR, and MDR, respectively, and effective antibiotics against them were fosfomycin and polymyxins. Among 57 isolated lactobacillus strains, two strains which were identified as Lactobacillus fermentum using biochemical and 16S rDNA methods showed broad inhibition/killing and anti-biofilm effects against all P. aeruginosa strains. They formed strong biofilms and had bile salts and low pH tolerance. Although investigation of inhibition mechanism of these strains showed no bacteriocin production, results obtained by high-performance liquid chromatography (HPLC) analysis indicated that their inhibitory effect was the result of production of three main organic acids including lactic acid, acetic acid, and formic acid. Considering the broad activity of these two L. fermentum strains, they can potentially be used in bio-control of drug-resistant strains of P. aeruginosa.
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246
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Benedek T, Szentgyörgyi F, Szabó I, Kriszt B, Révész F, Radó J, Maróti G, Táncsics A. Aerobic and oxygen-limited enrichment of BTEX-degrading biofilm bacteria: dominance of Malikia versus Acidovorax species. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:32178-32195. [PMID: 30220065 DOI: 10.1007/s11356-018-3096-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 08/28/2018] [Indexed: 05/14/2023]
Abstract
Due to their high resistance against environmental challenges, bacterial biofilms are ubiquitous and are frequently associated with undesired phenomena in environmental industry (e. g. biofouling). However, because of the high phylogenetic and functional diversity, bacterial biofilms are important sources of biotechnologically relevant microorganisms, e.g. those showing bioremediation potential. In our previous work, the high phylogenetic and metabolic diversity of a clogging biofilm, developed in a simple aromatic hydrocarbon (BTEX)-contaminated groundwater well was uncovered. The determination of relationships between different groups of biofilm bacteria and certain metabolic traits has been omitted so far. Therefore, by setting up new biofilm-based enrichment microcosms, the research goal of the present study was to identify the aerobic/hypoxic BTEX-degrading and/or prolific biofilm-forming bacteria. The initial bacterial community composition as well as temporal dynamics due to the selective enrichment has been determined. The obtained results indicated that the concentration of dissolved oxygen may be a strong selective force on the evolution and final structure of microbial communities, developed in hydrocarbon-contaminated environments. Accordingly, members of the genus Malikia proved to be the most dominant community members of the aerobic BTEX-degrading enrichments. Acidovorax spp. dominated the oxygen-limited/hypoxic setup. During the study, a strain collection of 23 different bacterial species was obtained. Non-pathogenic members of this strain collection, with outstanding biodegradation (e.g. Pseudomonas, Variovorax isolates) and biofilm-forming potential (e.g. Rhizobium), may potentially be applied in the development of biofilm-based semipermeable reactive biobarriers.
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Affiliation(s)
- Tibor Benedek
- Regional University Centre of Excellence in Environmental Industry, Szent István University, Páter K. u. 1, Gödöllő, H-2100, Hungary.
| | - Flóra Szentgyörgyi
- Department of Environmental Safety and Ecotoxicology, Szent István University, Páter K. u. 1, Gödöllő, H-2100, Hungary
| | - István Szabó
- Department of Environmental Safety and Ecotoxicology, Szent István University, Páter K. u. 1, Gödöllő, H-2100, Hungary
| | - Balázs Kriszt
- Department of Environmental Safety and Ecotoxicology, Szent István University, Páter K. u. 1, Gödöllő, H-2100, Hungary
| | - Fruzsina Révész
- Regional University Centre of Excellence in Environmental Industry, Szent István University, Páter K. u. 1, Gödöllő, H-2100, Hungary
| | - Júlia Radó
- Department of Environmental Safety and Ecotoxicology, Szent István University, Páter K. u. 1, Gödöllő, H-2100, Hungary
| | - Gergely Maróti
- Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, Temesvári krt. 62, Szeged, Hungary
- Faculty of Agricultural and Economics Studies, Tessedik Campus, Szent István University, Szabadság u. 1-3, Szarvas, H-5530, Hungary
| | - András Táncsics
- Regional University Centre of Excellence in Environmental Industry, Szent István University, Páter K. u. 1, Gödöllő, H-2100, Hungary
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247
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Yamada KJ, Kielian T. Biofilm-Leukocyte Cross-Talk: Impact on Immune Polarization and Immunometabolism. J Innate Immun 2018; 11:280-288. [PMID: 30347401 DOI: 10.1159/000492680] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 07/30/2018] [Indexed: 12/17/2022] Open
Abstract
Biofilms are bacterial communities contained within an extracellular matrix, which can colonize both native tissues and artificial surfaces. In particular, indwelling medical devices and prosthetic implants are targets for biofilm formation because they facilitate bacterial attachment via host proteins that coat the foreign body. Biofilm infections are particularly challenging to treat, since they are not readily cleared by antibiotics, require invasive procedures to eradicate, and are prone to recurrence. It has been demonstrated that biofilm-derived products can actively suppress proinflammatory immune responses, as evident by the recruitment of myeloid-derived suppressor cells and macrophage (MФ) polarization towards an anti-inflammatory state. Recent studies have shown that alterations in leukocyte metabolism shape their inflammatory phenotype and function. For example, anti-inflammatory MФs are biased towards oxidative phosphorylation whereas proinflammatory MФs favor aerobic glycolysis. This review will compare the immune responses elicited by planktonic and biofilm bacterial infections, with a discussion on the metabolic properties of MФs and neutrophils in response to both bacterial growth conditions.
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Affiliation(s)
- Kelsey J Yamada
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Tammy Kielian
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, USA,
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248
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Schroeder M, Horne SM, Prüß BM. Efficacy of β-phenylethylamine as a novel anti-microbial and application as a liquid catheter flush. J Med Microbiol 2018; 67:1778-1788. [PMID: 30325301 DOI: 10.1099/jmm.0.000840] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
With this study, we introduce a liquid flush for catheters and other tubing-based applications that consists of a solution of β-phenylethylamine (PEA) in tryptic soy broth. The initial experiments in multiwell polystyrene plates were conducted with Escherichia coli K-12 to assess the effectiveness of PEA at reducing planktonic growth, as well as the biomass and adenosine triphosphate (ATP) content of biofilm; PEA reduced these growth parameters as a function of increasing concentration. This effect was also seen in mutants of PEA catabolism, which leads us to believe that the PEA effect is due to PEA itself and not one of its degradation products. Since PEA reduced planktonic growth and biofilm when added at the time of inoculation, as well as at later time points, we propose PEA as a novel compound for the prevention and treatment of biofilm. PEA reduced planktonic growth and the ATP content of the biofilm for five bacterial pathogens, including an enterohemorrhagic E. coli, two uropathogenic E. coli, Pseudomonas aeruginosa and Staphylococcus aureus. A major finding of this study is the reduction of the ATP content of biofilm that formed in silicone tubing by periodic flushes of PEA. This experiment was performed to model antibiotic-lock treatment of an intravenous catheter. It was found that 10 mg ml-1 of PEA reduced the ATP content of biofilm of five bacterial strains by 96.3 % or more after 2 weeks of incubation and three treatments with PEA. For P. aeruginosa, the reduction in ATP content was paralleled by an identical percentage reduction in viable cells in the biofilm.
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Affiliation(s)
- Meredith Schroeder
- Department of Microbiological Sciences, North Dakota State University, 1523 Centennial Blvd, Fargo ND, 58108-6050, USA
| | - Shelley M Horne
- Department of Microbiological Sciences, North Dakota State University, 1523 Centennial Blvd, Fargo ND, 58108-6050, USA
| | - Birgit M Prüß
- Department of Microbiological Sciences, North Dakota State University, 1523 Centennial Blvd, Fargo ND, 58108-6050, USA
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249
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Jiang L, Lin J, Taggart CC, Bengoechea JA, Scott CJ. Nanodelivery strategies for the treatment of multidrug-resistant bacterial infections. JOURNAL OF INTERDISCIPLINARY NANOMEDICINE 2018; 3:111-121. [PMID: 30443410 PMCID: PMC6220773 DOI: 10.1002/jin2.48] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 06/27/2018] [Accepted: 07/10/2018] [Indexed: 12/15/2022]
Abstract
One of the most important health concerns in society is the development of nosocomial infections caused by multidrug-resistant pathogens. The purpose of this review is to discuss the issues in current antibiotic therapies and the ongoing progress of developing new strategies for the treatment of ESKAPE pathogen infections, which is acronymized for Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species. We not only examine the current issues caused by multidrug resistance but we also examine the barrier effects such as biofilm and intracellular localization exploited by these pathogens to avoid antibiotic exposure. Recent innovations in nanomedicine approaches and antibody antibiotic conjugates are reviewed as potential novel approaches for the treatment of bacterial infection, which ultimately may expand the useful life span of current antibiotics.
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Affiliation(s)
- Lai Jiang
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfastUK
| | - Jia Lin
- School of PharmacyQueen's University BelfastBelfastUK
| | - Clifford C. Taggart
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfastUK
| | - José A. Bengoechea
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfastUK
| | - Christopher J. Scott
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfastUK
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250
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Wojciech J, Kamila M, Wojciech B. Investigation of the population dynamics within a Pseudomonas aeruginosa biofilm using a flow based biofilm model system and flow cytometric evaluation of cellular physiology. BIOFOULING 2018; 34:835-850. [PMID: 30332894 DOI: 10.1080/08927014.2018.1508569] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 07/16/2018] [Accepted: 07/25/2018] [Indexed: 06/08/2023]
Abstract
In this study a flow based biofilm model system was used to simulate the formation of Pseudomonas aeruginosa biofilms on a stainless steel surface. To investigate the complexity of biofilm-associated P. aeruginosa populations a combination of microscopic observations and flow cytometric analysis (FCM) was adopted. Biofilm-associated P. aeruginosa cells were evaluated (1) under optimal vs reduced nutrient-availability at the initial adhesion stage, and (2) irrespective of nutrient-availability within a mature biofilm. Microscopic estimation of the extent of attachment revealed more effective colonization upon optimal vs starvation conditions. FCM allowed an in situ evaluation of P. aeruginosa vitality, using cellular redox potential measurements to discriminate active, mid-active and non-active sub-populations. Samples from recently attached cells and mature biofilms showed significant differences in the percentages of bacterial cells from the defined sub-populations. The approach demonstrated that distribution of individual P. aeruginosa sub-populations was influenced by the stage of the biofilm life-cycle and nutrient availability.
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Affiliation(s)
- Juzwa Wojciech
- a Department of Biotechnology and Food Microbiology , Poznan University of Life Sciences , Poznan , Poland
| | - Myszka Kamila
- a Department of Biotechnology and Food Microbiology , Poznan University of Life Sciences , Poznan , Poland
| | - Białas Wojciech
- a Department of Biotechnology and Food Microbiology , Poznan University of Life Sciences , Poznan , Poland
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