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Yu K, Alzahrani A, Khoddami S, Cheng JTJ, Mei Y, Gill A, Luo HD, Haney EF, Hilpert K, Hancock REW, Lange D, Kizhakkedathu JN. Rapid Assembly of Infection-Resistant Coatings: Screening and Identification of Antimicrobial Peptides Works in Cooperation with an Antifouling Background. ACS Appl Mater Interfaces 2021; 13:36784-36799. [PMID: 34328312 DOI: 10.1021/acsami.1c07515] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Bacterial adhesion and the succeeding biofilm formation onto surfaces are responsible for implant- and device-associated infections. Bifunctional coatings integrating both nonfouling components and antimicrobial peptides (AMPs) are a promising approach to develop potent antibiofilm coatings. However, the current approaches and chemistry for such coatings are time-consuming and dependent on substrates and involve a multistep process. Also, the information is limited on the influence of the coating structure or its components on the antibiofilm activity of such AMP-based coatings. Here, we report a new strategy to rapidly assemble a stable, potent, and substrate-independent AMP-based antibiofilm coating in a nonfouling background. The coating structure allowed for the screening of AMPs in a relevant nonfouling background to identify optimal peptide combinations that work in cooperation to generate potent antibiofilm activity. The structure of the coating was changed by altering the organization of the hydrophilic polymer chains within the coatings. The coatings were thoroughly characterized using various surface analytical techniques and correlated with the efficiency to prevent biofilm formation against diverse bacteria. The coating method that allowed the conjugation of AMPs without altering the steric protection ability of hydrophilic polymer structure results in a bifunctional surface coating with excellent antibiofilm activity. In contrast, the conjugation of AMPs directly to the hydrophilic polymer chains resulted in a surface with poor antibiofilm activity and increased adhesion of bacteria. Using this coating approach, we further established a new screening method and identified a set of potent surface-tethered AMPs with high activity. The success of this new peptide screening and coating method is demonstrated using a clinically relevant mouse infection model to prevent catheter-associated urinary tract infection (CAUTI).
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Affiliation(s)
- Kai Yu
- Centre for Blood Research and Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Amal Alzahrani
- The Stone Centre at VGH, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia V5Z 1M9, Canada
| | - Sara Khoddami
- The Stone Centre at VGH, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia V5Z 1M9, Canada
| | - John T J Cheng
- Department of Microbiology and Immunology and Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Yan Mei
- Centre for Blood Research and Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Arshdeep Gill
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Haiming D Luo
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Evan F Haney
- Department of Microbiology and Immunology and Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Kai Hilpert
- Institute of Infection and Immunology, St. George's University of London (SGUL), London SW17 0RE, United Kingdom
| | - Robert E W Hancock
- Department of Microbiology and Immunology and Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Dirk Lange
- The Stone Centre at VGH, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia V5Z 1M9, Canada
| | - Jayachandran N Kizhakkedathu
- Centre for Blood Research and Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
- The School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
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Yang W, Wang Z, Li Q, Jia Y, Song S, Ma Z, Liu J, Wang J. Photodynamic Inactivation Using Natural Bioactive Compound Prevents and Disrupts the Biofilm Produced by Staphylococcus saprophyticus. Molecules 2021; 26:molecules26164713. [PMID: 34443301 PMCID: PMC8399054 DOI: 10.3390/molecules26164713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 07/31/2021] [Accepted: 08/02/2021] [Indexed: 01/02/2023] Open
Abstract
Staphylococcus saprophyticus, the food-borne bacteria present in dairy products, ready-to-eat food and environmental sources, has been reported with antibiotic resistance, raising concerns about food microbial safety. The antimicrobial resistance of S. saprophyticus requires the development of new strategies. Light- and photosensitizer-based antimicrobial photodynamic inactivation (PDI) is a promising approach to control microbial contamination, whereas there is limited information regarding the effectiveness of PDI on S. saprophyticus biofilm control. In this study, PDI mediated by natural bioactive compound (curcumin) associated with LED was evaluated for its potential to prevent and disrupt S. saprophyticus biofilms. Biofilms were treated with curcumin (50, 100, 200 µM) and LED fluence (4.32 J/cm2, 8.64 J/cm2, 17.28 J/cm2). Control groups included samples treated only with curcumin or light, and samples received neither curcumin nor light. The action was examined on biofilm mass, viability, cellular metabolic activity and cytoplasmic membrane integrity. PDI using curcumin associated with LED exhibited significant antibiofilm activities, inducing biofilm prevention and removal, metabolic inactivation, intracellular membrane damage and cell death. Likewise, scanning electronic microscopy observations demonstrated obvious structural injury and morphological alteration of S. saprophyticus biofilm after PDI application. In conclusion, curcumin is an effective photosensitizer for the photodynamic control of S. saprophyticus biofilm.
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Affiliation(s)
- Wei Yang
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
- College of Basic Science, Tianjin Agricultural University, Tianjin 300392, China
| | - Ziyuan Wang
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
- Correspondence: (Z.W.); (J.W.)
| | - Qing Li
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
| | - Yating Jia
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
| | - Shuimiao Song
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
| | - Zichu Ma
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
| | - Jie Liu
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
| | - Jing Wang
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology and Business University, Beijing 100048, China; (W.Y.); (Q.L.); (Y.J.); (S.S.); (Z.M.); (J.L.)
- Correspondence: (Z.W.); (J.W.)
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Rapun-Araiz B, Haag AF, Solano C, Lasa I. The impact of two-component sensorial network in staphylococcal speciation. Curr Opin Microbiol 2020; 55:40-47. [PMID: 32199334 PMCID: PMC7322546 DOI: 10.1016/j.mib.2020.02.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/31/2020] [Accepted: 02/03/2020] [Indexed: 01/26/2023]
Abstract
Bacteria use two-component systems (TCSs) to sense and respond to their environments. Free-living bacteria usually contain dozens of TCSs, each of them responsible for sensing and responding to a different range of signals. Differences in the content of two-component systems are related with the capacity of the bacteria to colonize different niches or improve the efficiency to grow under the conditions of the existing niche. This review highlights differences in the TCS content between Staphylococcus aureus and Staphylococcus saprophyticus as a case study to exemplify how the ability to sense and respond to the environment is relevant for bacterial capacity to colonize and survive in/on different body surfaces.
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Affiliation(s)
- Beatriz Rapun-Araiz
- Laboratory of Microbial Pathogenesis, Navarrabiomed, Complejo Hospitalario de Navarra (CHN)-Universidad Pública de Navarra (UPNA), IDISNA, Pamplona, 31008, Spain
| | - Andreas F Haag
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Cristina Solano
- Laboratory of Microbial Pathogenesis, Navarrabiomed, Complejo Hospitalario de Navarra (CHN)-Universidad Pública de Navarra (UPNA), IDISNA, Pamplona, 31008, Spain
| | - Iñigo Lasa
- Laboratory of Microbial Pathogenesis, Navarrabiomed, Complejo Hospitalario de Navarra (CHN)-Universidad Pública de Navarra (UPNA), IDISNA, Pamplona, 31008, Spain.
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Adeghate J, Juhász E, Pongrácz J, Rimanóczy É, Kristóf K. Does Staphylococcus Saprophyticus Cause Acute Cystitis only in Young Females, or is there more to the Story? A One-Year Comprehensive Study Done in Budapest, Hungary. Acta Microbiol Immunol Hung 2016; 63:57-67. [PMID: 27020869 DOI: 10.1556/030.63.2016.1.4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Staphylococcus saprophyticus is a well-known urinary pathogen in acute cystitis in young females. We completed a retrospective overview of the distribution of urinary tract infections (UTIs) occurring in 2014, at Semmelweis University hospitals and at Heim Pál Children's Hospital. Six age-groups (ages 0-100) were examined, with the frequency of S. saprophyticus in females being: 0.1% (0-4), 0.7%, (5-15), 7.4% (16-24), 1.2% (25-39), 0.4% (40-59) and 0.1% (60-100), and S. saprophyticus being the 3(rd) most common pathogen in females aged 16-24. In males, S. saprophyticus was only isolated from those aged 5-15. Seasonal distribution of UTIs caused by S. saprophyticus showed that most infections occurred during the months of January, June, August and November. Antibiotic-resistance rates of amoxicillin, clindamycin, doxycycline, erythromycin, gentamicin and sulfamethoxazole- trimethoprim varied as follows: 0.9%, 32.7%, 19.6%, 34.6%, 0.9% and 0.9%, respectively. Thirty randomly selected samples were analysed by pulsed-field gelelectrophoresis, and 28 different genotypes were identified. S. saprophyticus is involved in the pathogenesis of acute cystitis not only in young females, but also in other age-groups, and in young males as well. We did not find any significant seasonal occurrence in S. saprophyticus-caused UTIs. The infective strains were genetically diverse. Antibiotic-resistance does not pose any issue as of yet.
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Affiliation(s)
- Jennifer Adeghate
- Department of Laboratory Medicine, Semmelweis University , Budapest , Hungary
| | - Emese Juhász
- Department of Laboratory Medicine, Semmelweis University , Budapest , Hungary
| | - Júlia Pongrácz
- Department of Laboratory Medicine, Semmelweis University , Budapest , Hungary
| | - Éva Rimanóczy
- Central Laboratory, Heim Pál Children's Hospital , Budapest , Hungary
| | - Katalin Kristóf
- Department of Laboratory Medicine, Semmelweis University , Budapest , Hungary
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Oates A, McBain AJ. Growth of MRSA and Pseudomonas aeruginosa in a fine-celled foam model containing sessile commensal skin bacteria. Biofouling 2016; 32:25-33. [PMID: 26727101 PMCID: PMC4706025 DOI: 10.1080/08927014.2015.1117607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 11/04/2015] [Indexed: 06/05/2023]
Abstract
Sessile cultures of the skin bacteria Staphylococcus saprophyticus and Corynebacterium xerosis were grown using novel fine-celled foam substrata to test the outcome of challenge by methicillin-resistant Staphylococcus aureus or Pseudomonas aeruginosa under three growth medium regimens (simulated sweat, simulated serum or simulated sweat substituted with simulated serum during the microbial challenge). S. saprophyticus and C. xerosis significantly limited MRSA and P. aeruginosa immigration respectively, under the simulated sweat and serum medium regimes. Under the substitution medium regime however, MRSA and P. aeruginosa integrated into pre-established biofilms to a significantly greater extent, attaining cell densities similar to the axenic controls. The outcome of challenge was influenced by the medium composition and test organism but could not be predicted based on planktonic competition assays or growth dynamics. Interactions between skin and wound isolates could be modelled using the fine-celled foam-based system. This model could be used to further investigate interactions and also in preclinical studies of antimicrobial wound care regimens.
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Affiliation(s)
- Angela Oates
- Manchester Pharmacy School, The University of Manchester, Manchester, UK
| | - Andrew J. McBain
- Manchester Pharmacy School, The University of Manchester, Manchester, UK
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Latif M, Usman J, Gilani M, Munir T, Mushtaq M, Anjum R. Coagulase negative staphylococci - a fast emerging threat. J PAK MED ASSOC 2015; 65:283-286. [PMID: 25933562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To determine the frequency of isolation of coagulase-negative staphylococci and their resistance to methicillin over a period of time. METHODS The descriptive cross-sectional study was carried out at Army Medical College, Rawalpindi, from June 2009 to May 2012, and comprised clinical samples mostly from patients admitted to the intensive care unit. They were inoculated onto appropriate culture media depending upon the specimen. After 24-hour incubation at 35°C, coagulase-negative staphylococci were identified on the basis of colony morphology, gram staining, a positive catalase and a negative tube coagulase test.Methicillin resistance among the isolated staphylococci was determined using a 30µg Cefoxitin disc as per the Clinical and Laboratory Standards Institute protocol. Number of coagulase-negative staphylococci for each year and their methicillin resistance rates were calculated. A comparison was made with methicillin resistant staphylococcus aureus) isolated during the same period. RESULTS Of the total 1331 specimens studies over three years, 581(43.65%) were coagulase-negative staphylococci. The rate of coagulase-negative staphylococci and methicillin resistance was higher each year; 110(26.6%) in May 2009-Jun 2010, 134(36.5%) in 2011, and 337(61%) in 2012. Methicillin resistance rates also increased from 25(22.7%) to 46(34.3%) and then to 201(59.6%) in 2012.Maximum isolated specimens came from blood 311(53.5%), followed by pus/swabs 204(35.1%). CONCLUSIONS The frequency of isolation of coagulase-negative staphylococci and its methicillin resistance among hospitalised patients is on the rise.
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Affiliation(s)
- Mahwish Latif
- Department of Microbiology, Army Medical College Rawalpindi, National University of Sciences and Technology Islamabad, Pakistan
| | - Javaid Usman
- Department of Microbiology, Army Medical College Rawalpindi, National University of Sciences and Technology Islamabad, Pakistan
| | - Mehreen Gilani
- Department of Microbiology, Army Medical College Rawalpindi, National University of Sciences and Technology Islamabad, Pakistan
| | - Tehmina Munir
- Department of Microbiology, Army Medical College Rawalpindi, National University of Sciences and Technology Islamabad, Pakistan
| | - Maria Mushtaq
- Department of Microbiology, Army Medical College Rawalpindi, National University of Sciences and Technology Islamabad, Pakistan
| | - Rabia Anjum
- Department of Microbiology, Army Medical College Rawalpindi, National University of Sciences and Technology Islamabad, Pakistan
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