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Özsoylu D, Aliazizi F, Wagner P, Schöning MJ. Template bacteria-free fabrication of surface imprinted polymer-based biosensor for E. coli detection using photolithographic mimics: Hacking bacterial adhesion. Biosens Bioelectron 2024; 261:116491. [PMID: 38879900 DOI: 10.1016/j.bios.2024.116491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 06/05/2024] [Accepted: 06/07/2024] [Indexed: 06/18/2024]
Abstract
As one class of molecular imprinted polymers (MIPs), surface imprinted polymer (SIP)-based biosensors show great potential in direct whole-bacteria detection. Micro-contact imprinting, that involves stamping the template bacteria immobilized on a substrate into a pre-polymerized polymer matrix, is the most straightforward and prominent method to obtain SIP-based biosensors. However, the major drawbacks of the method arise from the requirement for fresh template bacteria and often non-reproducible bacteria distribution on the stamp substrate. Herein, we developed a positive master stamp containing photolithographic mimics of the template bacteria (E. coli) enabling reproducible fabrication of biomimetic SIP-based biosensors without the need for the "real" bacteria cells. By using atomic force and scanning electron microscopy imaging techniques, respectively, the E. coli-capturing ability of the SIP samples was tested, and compared with non-imprinted polymer (NIP)-based samples and control SIP samples, in which the cavity geometry does not match with E. coli cells. It was revealed that the presence of the biomimetic E. coli imprints with a specifically designed geometry increases the sensor E. coli-capturing ability by an "imprinting factor" of about 3. These findings show the importance of geometry-guided physical recognition in bacterial detection using SIP-based biosensors. In addition, this imprinting strategy was employed to interdigitated electrodes and QCM (quartz crystal microbalance) chips. E. coli detection performance of the sensors was demonstrated with electrochemical impedance spectroscopy (EIS) and QCM measurements with dissipation monitoring technique (QCM-D).
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Affiliation(s)
- Dua Özsoylu
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Campus Jülich, 52428, Jülich, Germany
| | - Fereshteh Aliazizi
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, B-3001, Leuven, Belgium
| | - Patrick Wagner
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, B-3001, Leuven, Belgium
| | - Michael J Schöning
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Campus Jülich, 52428, Jülich, Germany; Institute of Biological Information Processing (IBI-3), Research Centre Jülich GmbH, 52425, Jülich, Germany.
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2
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Ramesh Kumar U, Nguyen NT, Dewangan NK, Mohiuddin SG, Orman MA, Cirino PC, Conrad JC. Co-Expression of type 1 fimbriae and flagella in Escherichia coli: consequences for adhesion at interfaces. SOFT MATTER 2024; 20:7397-7404. [PMID: 39021099 DOI: 10.1039/d4sm00499j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Escherichia coli expresses surface appendages including fimbriae, flagella, and curli, at various levels in response to environmental conditions and external stimuli. Previous studies have revealed an interplay between expression of fimbriae and flagella in several E. coli strains, but how this regulation between fimbrial and flagellar expression affects adhesion to interfaces is incompletely understood. Here, we investigate how the concurrent expression of fimbriae and flagella by engineered strains of E. coli MG1655 affects their adhesion at liquid-solid and liquid-liquid interfaces. We tune fimbrial and flagellar expression on the cell surface through plasmid-based inducible expression of the fim operon and fliC-flhDC genes. We show that increased fimbrial expression increases interfacial adhesion as well as bacteria-driven actuation of micron-sized objects. Co-expression of flagella in fimbriated bacteria, however, does not greatly affect either of these properties. Together, these results suggest that interfacial adhesion as well as motion actuated by adherent bacteria can be altered by controlling the expression of surface appendages.
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Affiliation(s)
- Udayanidhi Ramesh Kumar
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA.
| | - Nam T Nguyen
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA.
| | - Narendra K Dewangan
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA.
| | - Sayed Golam Mohiuddin
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA.
| | - Mehmet A Orman
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA.
| | - Patrick C Cirino
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA.
| | - Jacinta C Conrad
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA.
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David A, Tahrioui A, Tareau AS, Forge A, Gonzalez M, Bouffartigues E, Lesouhaitier O, Chevalier S. Pseudomonas aeruginosa Biofilm Lifecycle: Involvement of Mechanical Constraints and Timeline of Matrix Production. Antibiotics (Basel) 2024; 13:688. [PMID: 39199987 PMCID: PMC11350761 DOI: 10.3390/antibiotics13080688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 09/01/2024] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen causing acute and chronic infections, especially in immunocompromised patients. Its remarkable adaptability and resistance to various antimicrobial treatments make it difficult to eradicate. Its persistence is enabled by its ability to form a biofilm. Biofilm is a community of sessile micro-organisms in a self-produced extracellular matrix, which forms a scaffold facilitating cohesion, cell attachment, and micro- and macro-colony formation. This lifestyle provides protection against environmental stresses, the immune system, and antimicrobial treatments, and confers the capacity for colonization and long-term persistence, often characterizing chronic infections. In this review, we retrace the events of the life cycle of P. aeruginosa biofilm, from surface perception/contact to cell spreading. We focus on the importance of extracellular appendages, mechanical constraints, and the kinetics of matrix component production in each step of the biofilm life cycle.
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Affiliation(s)
| | | | | | | | | | | | | | - Sylvie Chevalier
- Univ Rouen Normandie, Univ Caen Normandie, Normandie Univ, CBSA UR 4312, F-76000 Rouen, France
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Nishitani T, Hirokawa T, Ishiguro H, Ito T. Mechanism of antibacterial property of micro scale rough surface formed by fine-particle bombarding. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2024; 25:2376522. [PMID: 39055484 PMCID: PMC11271079 DOI: 10.1080/14686996.2024.2376522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 05/23/2024] [Accepted: 07/01/2024] [Indexed: 07/27/2024]
Abstract
Fine-particle bombardment (FPB) is typically used to modify metal surfaces by bombarding them with fine particles at high speed. FPB is not a coating technique but is used for forming microscale concavities and convexities on a surface. Previously, we reported that an FPB-treated surface showed antibacterial effects; however, the underlying mechanisms remain unclear. We hypothesized that the pitch size of concavity and convexity, and irregular microscale pattern of FPB-treated surfaces might contribute to the antibacterial performance. In this study, we applied FPB to stainless-steel surfaces and evaluated the antibacterial effects of the FPB-treated surfaces based on ISO 22,196:2007. The FPB-treated surfaces exhibited antibacterial activity against Escherichia coli, with an antibacterial activity value (R) of two or more. Furthermore, our experiments suggest that the antibacterial mechanism of the FPB-treated surface can be attributed to increased oxidative stress in bacteria owing to physical stress from the rough surface. The antibacterial effect of FPB-treated surfaces offers an effective measure against drug-resistant bacteria.
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Affiliation(s)
- Tomoko Nishitani
- Graduate School of Science and Engineering, Kansai University, Suita, Osaka, Japan
- Surf Technology Co. Ltd., Sagamihara, Kanagawa, Japan
| | - Takahiko Hirokawa
- Kanagawa Institute of Industrial Science and Technology, Ebina, Kanagawa, Japan
| | - Hitoshi Ishiguro
- Kanagawa Institute of Industrial Science and Technology, Ebina, Kanagawa, Japan
| | - Takeshi Ito
- Graduate School of Science and Engineering, Kansai University, Suita, Osaka, Japan
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Butler J, Morgan S, Jones L, Upton M, Besinis A. Evaluating the antibacterial efficacy of a silver nanocomposite surface coating against nosocomial pathogens as an antibiofilm strategy to prevent hospital infections. Nanotoxicology 2024; 18:410-436. [PMID: 39051684 DOI: 10.1080/17435390.2024.2379809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 07/04/2024] [Accepted: 07/05/2024] [Indexed: 07/27/2024]
Abstract
Antimicrobial nanocoatings may be a means of preventing nosocomial infections, which account for significant morbidity and mortality. The role of hospital sink traps in these infections is also increasingly appreciated. We describe the preparation, material characterization and antibacterial activity of a pipe cement-based silver nanocoating applied to unplasticized polyvinyl chloride, a material widely used in wastewater plumbing. Three-dimensional surface topography imaging and scanning electron microscopy showed increased roughness in all surface finishes versus control, with grinding producing the roughest surfaces. Silver stability within nanocoatings was >99.89% in deionized water and bacteriological media seeded with bacteria. The nanocoating exhibited potent antibiofilm (99.82-100% inhibition) and antiplanktonic (99.59-99.99% killing) activity against three representative bacterial species and a microbial community recovered from hospital sink traps. Hospital sink trap microbiota were characterized by sequencing the 16S rRNA gene, revealing the presence of opportunistic pathogens from genera including Pseudomonas, Enterobacter and Clostridioides. In a benchtop model sink trap system, nanocoating antibiofilm activity against this community remained significant after 11 days but waned following 25 days. Silver nanocoated disks in real-world sink traps in two university buildings had a limited antibiofilm effect, even though in vitro experiments using microbial communities recovered from the same traps demonstrated that the nanocoating was effective, reducing biofilm formation by >99.6% and killing >98% of planktonic bacteria. We propose that conditioning films forming in the complex conditions of real-world sink traps negatively impact nanocoating performance, which may have wider relevance to development of antimicrobial nanocoatings that are not tested in the real-world.
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Affiliation(s)
- James Butler
- School of Engineering, Computing and Mathematics, Faculty of Science and Engineering, University of Plymouth, Plymouth, United Kingdom
| | - Sian Morgan
- School of Engineering, Computing and Mathematics, Faculty of Science and Engineering, University of Plymouth, Plymouth, United Kingdom
| | - Lewis Jones
- Clinical Microbiology, University Hospitals Plymouth NHS Trust, Plymouth, United Kingdom
| | - Mathew Upton
- School of Biomedical Sciences, Faculty of Health, University of Plymouth, Plymouth, United Kingdom
| | - Alexandros Besinis
- School of Engineering, Computing and Mathematics, Faculty of Science and Engineering, University of Plymouth, Plymouth, United Kingdom
- Peninsula Dental School, Faculty of Health, University of Plymouth, Plymouth, United Kingdom
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Dong M, Kavannaugh M, Lee C, Feng H. Mircrofabricating double-sided polydimethylsiloxane (PDMS) artificial phylloplane for microbial food safety research. Food Res Int 2024; 184:114252. [PMID: 38609230 DOI: 10.1016/j.foodres.2024.114252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/14/2024]
Abstract
Leafy green surface microbiology studies often experience significant variations in results due to the heterogeneous nature of leaf surfaces. To provide a precise and controllable substitute, we microfabricated double-sided artificial leafy green phylloplanes using polydimethylsiloxane (PDMS) with a vinyl-terminated polyethylene glycol chain-based hydrophobicity modifier (PDMS-PEG) to modify PDMS hydrophobicity. We further tested the properties and applications of these artificial leaves, by examining the function of epicuticular wax, growth and survival of E. coli O157:H7 87-23 on the surface, and removal of attached E. coli cells via sanitation. The double-sided PDMS-PDMS-PEG leaves well-replicated their natural counterparts in macroscopic and microscopic structure, hydrophobicity, and E. coli O157:H7 87-23 attachment. After depositing natural epicuticular wax onto artificial leaves, the leaf surface wetting ability decreased, while E. coli O157:H7 87-23 surface retention increased. The artificial leaves supplied with lettuce lysate or bacterial growth media supported E. coli O157:H7 87-23 growth and survival similarly to those on natural leaves. In the sanitation test, the artificial lettuce leaves also displayed patterns similar to those of natural leaves regarding sanitizer efficiency. Overall, this study showcased the microfabrication and applications of double-sided PDMS-PDMS-PEG leaves as a replicable and controllable platform for future leafy green food safety studies.
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Affiliation(s)
- Mengyi Dong
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States.
| | - Melannie Kavannaugh
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States.
| | - Caroline Lee
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States.
| | - Hao Feng
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States; Department of Family and Consumer Sciences, North Carolina Agriculture and Technology State University, Greensboro, NC 27401, United States.
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7
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Yang J, Isaka T, Kikuchi K, Numayama-Tsuruta K, Ishikawa T. Bacterial accumulation in intestinal folds induced by physical and biological factors. BMC Biol 2024; 22:76. [PMID: 38581018 PMCID: PMC10998401 DOI: 10.1186/s12915-024-01874-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 03/25/2024] [Indexed: 04/07/2024] Open
Abstract
BACKGROUND The gut microbiota, vital for host health, influences metabolism, immune function, and development. Understanding the dynamic processes of bacterial accumulation within the gut is crucial, as it is closely related to immune responses, antibiotic resistance, and colorectal cancer. We investigated Escherichia coli behavior and distribution in zebrafish larval intestines, focusing on the gut microenvironment. RESULTS We discovered that E. coli spread was considerably suppressed within the intestinal folds, leading to a strong physical accumulation in the folds. Moreover, a higher concentration of E. coli on the dorsal side than on the ventral side was observed. Our in vitro microfluidic experiments and theoretical analysis revealed that the overall distribution of E. coli in the intestines was established by a combination of physical factor and bacterial taxis. CONCLUSIONS Our findings provide valuable insight into how the intestinal microenvironment affects bacterial motility and accumulation, enhancing our understanding of the behavioral and ecological dynamics of the intestinal microbiota.
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Affiliation(s)
- Jinyou Yang
- School of Intelligent Medicine, China Medical University, Shenyang, 110122, China.
| | - Toma Isaka
- Department of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, 6-6-01 Aoba, Sendai, 980-8579, Japan
| | - Kenji Kikuchi
- Department of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, 6-6-01 Aoba, Sendai, 980-8579, Japan
- Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aoba, Sendai, 980-8579, Japan
| | - Keiko Numayama-Tsuruta
- Department of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, 6-6-01 Aoba, Sendai, 980-8579, Japan
| | - Takuji Ishikawa
- Department of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, 6-6-01 Aoba, Sendai, 980-8579, Japan
- Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aoba, Sendai, 980-8579, Japan
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8
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Jin C, Sengupta A. Microbes in porous environments: from active interactions to emergent feedback. Biophys Rev 2024; 16:173-188. [PMID: 38737203 PMCID: PMC11078916 DOI: 10.1007/s12551-024-01185-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 03/27/2024] [Indexed: 05/14/2024] Open
Abstract
Microbes thrive in diverse porous environments-from soil and riverbeds to human lungs and cancer tissues-spanning multiple scales and conditions. Short- to long-term fluctuations in local factors induce spatio-temporal heterogeneities, often leading to physiologically stressful settings. How microbes respond and adapt to such biophysical constraints is an active field of research where considerable insight has been gained over the last decades. With a focus on bacteria, here we review recent advances in self-organization and dispersal in inorganic and organic porous settings, highlighting the role of active interactions and feedback that mediates microbial survival and fitness. We discuss open questions and opportunities for using integrative approaches to advance our understanding of the biophysical strategies which microbes employ at various scales to make porous settings habitable.
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Affiliation(s)
- Chenyu Jin
- Physics of Living Matter Group, Department of Physics and Materials Science, University of Luxembourg, 162 A, Avenue de la Faïencerie, Luxembourg City, L-1511 Luxembourg
| | - Anupam Sengupta
- Physics of Living Matter Group, Department of Physics and Materials Science, University of Luxembourg, 162 A, Avenue de la Faïencerie, Luxembourg City, L-1511 Luxembourg
- Institute for Advanced Studies, University of Luxembourg, 2 Avenue de l’Université, Esch-sur-Alzette, L-4365 Luxembourg
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9
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Duque-Sanchez L, Qu Y, Voelcker NH, Thissen H. Tackling catheter-associated urinary tract infections with next-generation antimicrobial technologies. J Biomed Mater Res A 2024; 112:312-335. [PMID: 37881094 DOI: 10.1002/jbm.a.37630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/21/2023] [Accepted: 10/10/2023] [Indexed: 10/27/2023]
Abstract
Urinary catheters and other medical devices associated with the urinary tract such as stents are major contributors to nosocomial urinary tract infections (UTIs) as they provide an access path for pathogens to enter the bladder. Considering that catheter-associated urinary tract infections (CAUTIs) account for approximately 75% of UTIs and that UTIs represent the most common type of healthcare-associated infections, novel anti-infective device technologies are urgently required. The rapid rise of antimicrobial resistance in the context of CAUTIs further highlights the importance of such preventative strategies. In this review, the risk factors for pathogen colonization in the urinary tract are dissected, taking into account the nature and mechanistics of this unique environment. Moreover, the most promising next-generation preventative strategies are critically assessed, focusing in particular on anti-infective surface coatings. Finally, emerging approaches in this field and their likely clinical impact are examined.
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Affiliation(s)
- Lina Duque-Sanchez
- Department of Manufacturing, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, Victoria, Australia
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Yue Qu
- Infection and Immunity Program, Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Nicolas H Voelcker
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility, Materials Science and Engineering, Monash University, Clayton, Victoria, Australia
| | - Helmut Thissen
- Department of Manufacturing, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, Victoria, Australia
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Zhai Y, Tian W, Chen K, Lan L, Kan J, Shi H. Flagella-mediated adhesion of Escherichia coli O157:H7 to surface of stainless steel, glass and fresh produces during sublethal injury and recovery. Food Microbiol 2024; 117:104383. [PMID: 37918998 DOI: 10.1016/j.fm.2023.104383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/06/2023] [Accepted: 09/10/2023] [Indexed: 11/04/2023]
Abstract
E. coli O157:H7 can be induced into sublethally injured (SI) state by lactic acid (LA) and regain activity in nutrient environments. This research clarified the role of flagella-related genes (fliD, fliS, cheA and motA) in adhesion of E. coli O157:H7 onto stainless steel, glass, lettuce, spinach, red cabbage and cucumber during LA-induced SI and recovery by plate counting. Results of adhesion showed improper flagellar rotation caused by the deletion of motA resulting in the decreased adhesion. Motility of wildtype determined by diameter of motility halo decreased in SI state and repaired with recovery time increasing, lagging behind changes in expression of flagella-related genes. Flagellar function-impaired strains all exhibited non-motile property. Thus, we speculated that flagella-mediated motility is critical in early stage of adhesion. We also found the effects of Fe2+, Ca2+ and Mn2+ on adhesion or motility of wildtype was independent of bacterial states. However, the addition of Ca2+ and Mn2+ did not affect motility of flagellar function-impaired strains as they did on wildtype. This research provides new insights to understand the role of flagella and cations in bacterial adhesion, which will aid in development of anti-adhesion agents to reduce bio-contamination in food processing.
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Affiliation(s)
- Yujun Zhai
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Weina Tian
- College of Bioengineering, Beijing Polytechnic, Beijing, 100176, China
| | - Kewei Chen
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Linshu Lan
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Jianquan Kan
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Hui Shi
- College of Food Science, Southwest University, Chongqing, 400715, China.
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11
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Hillig N, Schumann-Muck F, Hamedy A, Braun PG, Koethe M. Impact of nanoscale silicon dioxide coating of stainless-steel surfaces on Listeria monocytogenes. Folia Microbiol (Praha) 2024; 69:173-180. [PMID: 37688746 PMCID: PMC10876764 DOI: 10.1007/s12223-023-01089-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 08/24/2023] [Indexed: 09/11/2023]
Abstract
High resistance to environmental factors as well as the ability to form biofilms allow Listeria monocytogenes to persist for a long time in difficult-to-reach places in food-producing plants. L. monocytogenes enters final products from contaminated surfaces in different areas of plants and poses a health risk to consumer. Modified surfaces are already used in the food industry to prevent cross-contamination. In this study, stainless-steel surfaces were coated with nanoscale silicon dioxide and the effects on attachment, bacterial growth and detachment of L. monocytogenes were evaluated. Attachment was considered for three different ways of application to simulate different scenarios of contamination. Bacterial growth of L. monocytogenes on the surface was recorded over a period of up to 8 h. Detachment was tested after cleaning inoculated stainless-steel surfaces with heated distilled water or detergent. Coating stainless-steel surfaces with nanoscale silica tends to reduce adherence and increased detachment and does not influence the bacterial growth of L. monocytogenes. Further modifications of the coating are necessary for a targeted use in the reduction of L. monocytogenes in food-processing plants.
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Affiliation(s)
- Nadja Hillig
- Institute of Food Hygiene, Faculty of Veterinary Medicine , Leipzig University, An den Tierkliniken 1, 04103, Leipzig, Germany.
| | - Felicitas Schumann-Muck
- Institute of Food Hygiene, Faculty of Veterinary Medicine , Leipzig University, An den Tierkliniken 1, 04103, Leipzig, Germany
| | - Ahmad Hamedy
- Institute of Food Hygiene, Faculty of Veterinary Medicine , Leipzig University, An den Tierkliniken 1, 04103, Leipzig, Germany
| | - Peggy G Braun
- Institute of Food Hygiene, Faculty of Veterinary Medicine , Leipzig University, An den Tierkliniken 1, 04103, Leipzig, Germany
| | - Martin Koethe
- Institute of Food Hygiene, Faculty of Veterinary Medicine , Leipzig University, An den Tierkliniken 1, 04103, Leipzig, Germany
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Røder HL, Christidi E, Amador CI, Music S, Olesen AK, Svensson B, Madsen JS, Herschend J, Kreft JU, Burmølle M. Flagellar interference with plasmid uptake in biofilms: a joint experimental and modeling study. Appl Environ Microbiol 2024; 90:e0151023. [PMID: 38095456 PMCID: PMC10807428 DOI: 10.1128/aem.01510-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 10/30/2023] [Indexed: 01/25/2024] Open
Abstract
Plasmid conjugation is a key facilitator of horizontal gene transfer (HGT), and plasmids encoding antibiotic resistance drive the increasing prevalence of antibiotic resistance. In natural, engineered, and clinical environments, bacteria often grow in protective biofilms. Therefore, a better understanding of plasmid transfer in biofilms is needed. Our aim was to investigate plasmid transfer in a biofilm-adapted wrinkly colony mutant of Xanthomonas retroflexus (XRw) with enhanced matrix production and reduced motility. We found that XRw biofilms had an increased uptake of the broad host-range IncP-1ϵ plasmid pKJK5 compared to the wild type (WT). Proteomics revealed fewer flagellar-associated proteins in XRw, suggesting that flagella were responsible for reducing plasmid uptake. This was confirmed by the higher plasmid uptake of non-flagellated fliM mutants of the X. retroflexus wrinkly mutant as well as the wild type. Moreover, testing several flagellar mutants of Pseudomonas putida suggested that the flagellar effect was more general. We identified seven mechanisms with the potential to explain the flagellar effect and simulated them in an individual-based model. Two mechanisms could thus be eliminated (increased distances between cells and increased lag times due to flagella). Another mechanism identified as viable in the modeling was eliminated by further experiments. The possibility of steric hindrance of pilus movement and binding by flagella, reducing the frequency of contact and thus plasmid uptake, proved viable, and the three other viable mechanisms had a reduced probability of plasmid transfer in common. Our findings highlight the important yet complex effects of flagella during bacterial conjugation in biofilms.IMPORTANCEBiofilms are the dominant form of microbial life and bacteria living in biofilms are markedly different from their planktonic counterparts, yet the impact of the biofilm lifestyle on horizontal gene transfer (HGT) is still poorly understood. Horizontal gene transfer by conjugative plasmids is a major driver in bacterial evolution and adaptation, as exemplified by the troubling spread of antibiotic resistance. To either limit or promote plasmid prevalence and dissemination, we need a better understanding of plasmid transfer between bacterial cells, especially in biofilms. Here, we identified a new factor impacting the transfer of plasmids, flagella, which are required for many types of bacterial motility. We show that their absence or altered activity can lead to enhanced plasmid uptake in two bacterial species, Xanthomonas retroflexus and Pseudomonas putida. Moreover, we demonstrate the utility of mathematical modeling to eliminate hypothetical mechanisms.
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Affiliation(s)
- Henriette Lyng Røder
- Department of Food Science, University of Copenhagen, Copenhagen, Denmark
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Eleni Christidi
- School of Biosciences & Institute of Microbiology and Infection & Centre for Computational Biology, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | | | - Samra Music
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | | | - Birte Svensson
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark
| | | | - Jakob Herschend
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Jan-Ulrich Kreft
- School of Biosciences & Institute of Microbiology and Infection & Centre for Computational Biology, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Mette Burmølle
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
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Wu S, Luo S, Cen Z, Li Q, Li L, Li W, Huang Z, He W, Liang G, Wu D, Zhou M, Li Y. All-in-one porous membrane enables full protection in guided bone regeneration. Nat Commun 2024; 15:119. [PMID: 38168072 PMCID: PMC10762214 DOI: 10.1038/s41467-023-43476-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 11/10/2023] [Indexed: 01/05/2024] Open
Abstract
The sophisticated hierarchical structure that precisely combines contradictory mechanical and biological characteristics is ideal for biomaterials, but it is challenging to achieve. Herein, we engineer a spatiotemporally hierarchical guided bone regeneration (GBR) membrane by rational bilayer integration of densely porous N-halamine functionalized bacterial cellulose nanonetwork facing the gingiva and loosely porous chitosan-hydroxyapatite composite micronetwork facing the alveolar bone. Our GBR membrane asymmetrically combine stiffness and flexibility, ingrowth barrier and ingrowth guiding, as well as anti-bacteria and cell-activation. The dense layer has a mechanically matched space maintenance capacity toward gingiva, continuously blocks fibroblasts, and prevents bacterial invasion with multiple mechanisms including release-killing, contact-killing, anti-adhesion, and nanopore-blocking; the loose layer is ultra-soft to conformally cover bone surfaces and defect cavity edges, enables ingrowth of osteogenesis-associated cells, and creates a favorable osteogenic microenvironment. As a result, our all-in-one porous membrane possesses full protective abilities in GBR.
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Affiliation(s)
- Shuyi Wu
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510055, Guangzhou, P. R. China
| | - Shulu Luo
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510055, Guangzhou, P. R. China
| | - Zongheng Cen
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, 510006, Guangzhou, P.R. China
| | - Qianqian Li
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510055, Guangzhou, P. R. China
| | - Luwei Li
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510055, Guangzhou, P. R. China
| | - Weiran Li
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510055, Guangzhou, P. R. China
| | - Zhike Huang
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 510080, Guangzhou, P. R. China
| | - Wenyi He
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, 510006, Guangzhou, P.R. China
| | - Guobin Liang
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510055, Guangzhou, P. R. China
| | - Dingcai Wu
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, 510006, Guangzhou, P.R. China.
| | - Minghong Zhou
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 510080, Guangzhou, P. R. China.
| | - Yan Li
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510055, Guangzhou, P. R. China.
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14
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Tu Y, Ren H, He Y, Ying J, Chen Y. Interaction between microorganisms and dental material surfaces: general concepts and research progress. J Oral Microbiol 2023; 15:2196897. [PMID: 37035450 PMCID: PMC10078137 DOI: 10.1080/20002297.2023.2196897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023] Open
Abstract
Bacterial adhesion to dental materials’ surfaces is the initial cause of dental materials-related infections. Therefore, inhibiting bacterial adhesion is a critical step in preventing and controlling these infections. To this end, it is important to know how the properties of dental materials affect the interactions between microorganisms and material surfaces to produce materials without biological contamination. This manuscript reviews the mechanism of bacterial adhesion to dental materials, the relationships between their surface properties and bacterial adhesion, and the impact of bacterial adhesion on their surface properties. In addition, this paper summarizes how these surface properties impact oral biofilm formation and proposes designing intelligent dental material surfaces that can reduce biological contamination.
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Affiliation(s)
- Yan Tu
- Department of Endodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, China
- Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Huaying Ren
- Department of Endodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, China
- Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Yiwen He
- School of Stomatology, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiaqi Ying
- School of Stomatology, Zhejiang University School of Medicine, Hangzhou, China
| | - Yadong Chen
- Department of Endodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, China
- Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
- CONTACT Yadong Chen Department of Endodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou310000, China
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15
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Roy A, Patil D, Yarlagadda PKDV, Chatterjee K. Cooperative stiffening of flexible high aspect ratio nanostructures impart mechanobactericidal activity to soft substrates. J Colloid Interface Sci 2023; 652:2127-2138. [PMID: 37703682 DOI: 10.1016/j.jcis.2023.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 08/05/2023] [Accepted: 09/04/2023] [Indexed: 09/15/2023]
Abstract
Understanding how bacteria interact with surfaces with micrometer and/or sub-micrometer roughness is critical for developing antibiofouling and bactericidal topographies. A primary research focus in this field has been replicating and emulating bioinspired nanostructures on various substrates to investigate their mechanobactericidal potential. Yet, reports on polymer substrates, especially with very high aspect ratios, have been rare, despite their widespread use in our daily lives. Specifically, the role of a decrease in stiffness with an increase in the aspect ratio of nanostructures may be consequential for the mechanobactericidal mechanism, which is biophysical in nature. Therefore, this work reports on generating bioinspired high aspect ratio nanostructures on poly(ethylene terephthalate) (PET) surfaces to study and elucidate their antibacterial and antibiofouling properties. Biomimetic nanotopographies with variable aspect ratios were generated via maskless dry etching of PET in oxygen plasma. It was found that both high and low-aspect ratio structures effectively neutralized Gram-negative bacterial contamination by imparting damage to their membranes but were unable to inactivate Gram-positive cells. Notably, the clustering of the soft, flexible tall nanopillars resulted in cooperative stiffening, as revealed by the nanomechanical behavior of the nanostructures and validated with the help of finite element simulations. Moreover, external capillary forces augmented the killing efficiency by enhancing the strain on the bacterial cell wall. Finally, experimental and computational investigation of the durability of the nanostructured surfaces showed that the structures were robust enough to withstand forces encountered in daily life. Our results demonstrate the potential of the single-step dry etching method for the fabrication of mechanobactericidal topographies and their potential in a wide variety of applications to minimize bacterial colonization of soft substrates like polymers.
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Affiliation(s)
- Anindo Roy
- Department of Materials Engineering, Indian Institute of Science, CV Raman Road, Bengaluru 560012, India
| | - Deepak Patil
- Department of Materials Engineering, Indian Institute of Science, CV Raman Road, Bengaluru 560012, India; Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India
| | | | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, CV Raman Road, Bengaluru 560012, India.
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16
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Sidner B, Lerma A, Biswas B, Do TVT, Yu Y, Ronish LA, McCullough H, Auchtung JM, Piepenbrink KH. Flagellin is essential for initial attachment to mucosal surfaces by Clostridioides difficile. Microbiol Spectr 2023; 11:e0212023. [PMID: 37823657 PMCID: PMC10714722 DOI: 10.1128/spectrum.02120-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 09/04/2023] [Indexed: 10/13/2023] Open
Abstract
IMPORTANCE Clostridioides difficile is one of the leading causes of hospital-acquired infections worldwide and presents challenges in treatment due to recurrent gastrointestinal disease after treatment with antimicrobials. The mechanisms by which C. difficile colonizes the gut represent a key gap in knowledge, including its association with host cells and mucosa. Our results show the importance of flagellin for specific adhesion to mucosal hydrogels and can help to explain prior observations of adhesive defects in flagellin and pilin mutants.
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Affiliation(s)
- Ben Sidner
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Armando Lerma
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Baishakhi Biswas
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Thi Van Thanh Do
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Yafan Yu
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Leslie A. Ronish
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Hugh McCullough
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Nebraska Food for Health Center, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Jennifer M. Auchtung
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Nebraska Food for Health Center, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Kurt H. Piepenbrink
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Nebraska Food for Health Center, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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17
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Nan Z, Floquet P, Combes D, Tendero C, Castelain M. Surface Conditioning Effects on Submerged Optical Sensors: A Comparative Study of Fused Silica, Titanium Dioxide, Aluminum Oxide, and Parylene C. SENSORS (BASEL, SWITZERLAND) 2023; 23:9546. [PMID: 38067919 PMCID: PMC10708880 DOI: 10.3390/s23239546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/17/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023]
Abstract
Optical sensors excel in performance but face efficacy challenges when submerged due to potential surface colonization, leading to signal deviation. This necessitates robust solutions for sustained accuracy. Protein and microorganism adsorption on solid surfaces is crucial in antibiofilm studies, contributing to conditioning film and biofilm formation. Most studies focus on surface characteristics (hydrophilicity, roughness, charge, and composition) individually for their adhesion impact. In this work, we tested four materials: silica, titanium dioxide, aluminum oxide, and parylene C. Bovine Serum Albumin (BSA) served as the biofouling conditioning model, assessed with X-ray photoelectron spectroscopy (XPS). Its effect on microorganism adhesion (modeled with functionalized microbeads) was quantified using a shear stress flow chamber. Surface features and adhesion properties were correlated via Principal Component Analysis (PCA). Protein adsorption is influenced by nanoscale roughness, hydrophilicity, and likely correlated with superficial electron distribution and bond nature. Conditioning films alter the surface interaction with microbeads, affecting hydrophilicity and local charge distribution. Silica shows a significant increase in microbead adhesion, while parylene C exhibits a moderate increase, and titanium dioxide shows reduced adhesion. Alumina demonstrates notable stability, with the conditioning film minimally impacting adhesion, which remains low.
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Affiliation(s)
- Zibin Nan
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
| | - Pascal Floquet
- LGC, Université de Toulouse, CNRS, INPT, UPS—ENSIACET 4, allée Émile Monso, 31030 Toulouse, France;
| | - Didier Combes
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
| | - Claire Tendero
- CIRIMAT, Université de Toulouse, CNRS, INPT, UPS—ENSIACET 4, allée Émile Monso, 31030 Toulouse, France;
| | - Mickaël Castelain
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
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18
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Droumpali A, Liu Y, Ferrer-Florensa X, Sternberg C, Dimaki M, Andersen AJC, Strube ML, Kempen PJ, Gram L, Taboryski R. Biosynthesis enhancement of tropodithietic acid (TDA) antibacterial compound through biofilm formation by marine bacteria Phaeobacter inhibens on micro-structured polymer surfaces. RSC Adv 2023; 13:33159-33166. [PMID: 37964901 PMCID: PMC10641763 DOI: 10.1039/d3ra05407a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 10/29/2023] [Indexed: 11/16/2023] Open
Abstract
Although aquaculture is a major player in current and future food production, the routine use of antibiotics provides ample ground for development of antibiotic resistance. An alternative route to disease control is the use of probiotic bacteria such as the marine bacteria Phaeobacter inhibens which produces tropodithietic acid (TDA) that inhibit pathogens without affecting the fish. Improving conditions for the formation of biofilm and TDA-synthesis is a promising avenue for biocontrol in aquaculture. In this study, the biosynthesis of TDA by Phaeobacter inhibens grown on micro-structured polymeric surfaces in micro-fluidic flow-cells is investigated. The formation of biofilms on three surface topographies; hexagonal micro-pit-arrays, hexagonal micro-pillar-arrays, and planar references is investigated. The biomass on these surfaces is measured by a non-invasive confocal microscopy 3D imaging technique, and the corresponding TDA production is monitored by liquid chromatography mass spectrometry (LC-MS) in samples collected from the outlets of the microfluidic channels. Although all surfaces support growth of P. inhibens, biomass appears to be decoupled from total TDA biosynthesis as the micro-pit-arrays generate the largest biomass while the micro-pillar-arrays produce significantly higher amounts of TDA. The findings highlight the potential for optimized micro-structured surfaces to maintain biofilms of probiotic bacteria for sustainable aquacultures.
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Affiliation(s)
- Ariadni Droumpali
- DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark Ørsteds Plads, Building 347 DK-2800 Kgs. Lyngby Denmark
| | - Yuyan Liu
- DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark Ørsteds Plads, Building 347 DK-2800 Kgs. Lyngby Denmark
| | - Xavier Ferrer-Florensa
- DTU Bioengineering, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 221 DK-2800 Kgs. Lyngby Denmark
| | - Claus Sternberg
- DTU Bioengineering, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 221 DK-2800 Kgs. Lyngby Denmark
| | - Maria Dimaki
- DTU Bioengineering, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 221 DK-2800 Kgs. Lyngby Denmark
| | - Aaron J C Andersen
- DTU Bioengineering, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 221 DK-2800 Kgs. Lyngby Denmark
| | - Mikael L Strube
- DTU Bioengineering, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 221 DK-2800 Kgs. Lyngby Denmark
| | - Paul J Kempen
- DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark Ørsteds Plads, Building 347 DK-2800 Kgs. Lyngby Denmark
| | - Lone Gram
- DTU Bioengineering, Department of Biotechnology and Biomedicine, Technical University of Denmark Søltofts Plads, Building 221 DK-2800 Kgs. Lyngby Denmark
| | - Rafael Taboryski
- DTU Nanolab, National Centre for Nano Fabrication and Characterization, Technical University of Denmark Ørsteds Plads, Building 347 DK-2800 Kgs. Lyngby Denmark
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19
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Zhai H, Yeo J. Controlling biofilm transport with porous metamaterials designed with Bayesian learning. J Mech Behav Biomed Mater 2023; 147:106127. [PMID: 37797554 DOI: 10.1016/j.jmbbm.2023.106127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/29/2023] [Accepted: 09/12/2023] [Indexed: 10/07/2023]
Abstract
Biofilm growth and transport in confined systems frequently occur in natural and engineered systems. Designing customizable engineered porous materials for controllable biofilm transportation properties could significantly improve the rapid utilization of biofilms as engineered living materials for applications in pollution alleviation, material self-healing, energy production, and many more. We combine Bayesian optimization (BO) and individual-based modeling to conduct design optimizations for maximizing different porous materials' (PM) biofilm transportation capability. We first characterize the acquisition function in BO for designing 2-dimensional porous membranes. We use the expected improvement acquisition function for designing lattice metamaterials (LM) and 3-dimensional porous media (3DPM). We find that BO is 92.89% more efficient than the uniform grid search method for LM and 223.04% more efficient for 3DPM. For all three types of structures, the selected characterization simulation tests are in good agreement with the design spaces approximated with Gaussian process regression. All the extracted optimal designs exhibit better biofilm growth and transportability than unconfined space without substrates. Our comparison study shows that PM stimulates biofilm growth by taking up volumetric space and pushing biofilms' upward growth, as evidenced by a 20% increase in bacteria cell numbers in unconfined space compared to porous materials, and 128% more bacteria cells in the target growth region for PM-induced biofilm growth compared with unconfined growth. Our work provides deeper insights into the design of substrates to tune biofilm growth, analyzing the optimization process and characterizing the design space, and understanding biophysical mechanisms governing the growth of biofilms.
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Affiliation(s)
- Hanfeng Zhai
- Sibley School of Mechanical and Aerospace Engineering Cornell University, Ithaca, NY 14850, USA
| | - Jingjie Yeo
- Sibley School of Mechanical and Aerospace Engineering Cornell University, Ithaca, NY 14850, USA.
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20
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Chen H, Cheng Y, Moraru CI. Blue 405 nm LED light effectively inactivates bacterial pathogens on substrates and packaging materials used in food processing. Sci Rep 2023; 13:15472. [PMID: 37726297 PMCID: PMC10509141 DOI: 10.1038/s41598-023-42347-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 09/08/2023] [Indexed: 09/21/2023] Open
Abstract
This study investigates the antimicrobial effectiveness of 405 nm light emitting diodes (LEDs) against pathogenic Escherichia coli O157:H7, Listeria monocytogenes, Pseudomonas aeruginosa, Salmonella Typhimurium, and Staphylococcus aureus, in thin liquid films (TLF) and on solid surfaces. Stainless steel (SS), high density polyethylene (HDPE), low density polyethylene (LDPE), and borosilicate glass were used as materials typically encountered in food processing, food service, and clinical environments. Anodic aluminum oxide (AAO) coupons with nanoscale topography were used, to evaluate the effect of topography on inactivation. The impact of surface roughness, hydrophobicity, and reflectivity on inactivation was assessed. A 48 h exposure to 405 nm led to reductions ranging from 1.3 (E. coli) to 5.7 (S. aureus) log CFU in TLF and 3.1 to 6.3 log CFU on different solid contact surfaces and packaging materials. All inactivation curves were nonlinear and followed Weibull kinetics, with better inactivation predictions on surfaces (0.89 ≤ R2 ≤ 1.0) compared to TLF (0.76 ≤ R2 ≤ 0.99). The fastest inactivation rate was observed on small nanopore AAO coupons inoculated with L. monocytogenes and S. aureus, indicating inactivation enhancing potential of these surfaces. These results demonstrate significant promise of 405 nm LEDs for antimicrobial applications in food processing and handling and the healthcare industry.
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Affiliation(s)
- Hanyu Chen
- Department of Food Science, Cornell University, Ithaca, NY, 14853, USA
| | - Yifan Cheng
- Department of Food Science, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
| | - Carmen I Moraru
- Department of Food Science, Cornell University, Ithaca, NY, 14853, USA.
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21
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Tesler AB, Kolle S, Prado LH, Thievessen I, Böhringer D, Backholm M, Karunakaran B, Nurmi HA, Latikka M, Fischer L, Stafslien S, Cenev ZM, Timonen JVI, Bruns M, Mazare A, Lohbauer U, Virtanen S, Fabry B, Schmuki P, Ras RHA, Aizenberg J, Goldmann WH. Long-term stability of aerophilic metallic surfaces underwater. NATURE MATERIALS 2023:10.1038/s41563-023-01670-6. [PMID: 37723337 DOI: 10.1038/s41563-023-01670-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 08/21/2023] [Indexed: 09/20/2023]
Abstract
Aerophilic surfaces immersed underwater trap films of air known as plastrons. Plastrons have typically been considered impractical for underwater engineering applications due to their metastable performance. Here, we describe aerophilic titanium alloy (Ti) surfaces with extended plastron lifetimes that are conserved for months underwater. Long-term stability is achieved by the formation of highly rough hierarchically structured surfaces via electrochemical anodization combined with a low-surface-energy coating produced by a fluorinated surfactant. Aerophilic Ti surfaces drastically reduce blood adhesion and, when submerged in water, prevent adhesion of bacteria and marine organisms such as barnacles and mussels. Overall, we demonstrate a general strategy to achieve the long-term stability of plastrons on aerophilic surfaces for previously unattainable underwater applications.
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Affiliation(s)
- Alexander B Tesler
- Department of Materials Science and Engineering, Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.
| | - Stefan Kolle
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, USA
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Lucia H Prado
- Department of Materials Science and Engineering, Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Ingo Thievessen
- Department of Physics, Biophysics Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - David Böhringer
- Department of Physics, Biophysics Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Matilda Backholm
- Department of Applied Physics, School of Science, Aalto University, Espoo, Finland
| | | | - Heikki A Nurmi
- Department of Applied Physics, School of Science, Aalto University, Espoo, Finland
| | - Mika Latikka
- Department of Applied Physics, School of Science, Aalto University, Espoo, Finland
| | - Lena Fischer
- Department of Physics, Biophysics Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Shane Stafslien
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, ND, USA
| | - Zoran M Cenev
- Department of Applied Physics, School of Science, Aalto University, Espoo, Finland
| | - Jaakko V I Timonen
- Department of Applied Physics, School of Science, Aalto University, Espoo, Finland
| | - Mark Bruns
- Department of Materials Science and Engineering, Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Anca Mazare
- Department of Materials Science and Engineering, Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Advanced Institute for Materials Research (AIMR), National University Corporation Tohoku University (TU), Sendai, Japan
| | - Ulrich Lohbauer
- Department of Operative Dentistry and Periodontology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Sannakaisa Virtanen
- Department of Materials Science and Engineering, Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Ben Fabry
- Department of Physics, Biophysics Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Patrik Schmuki
- Department of Materials Science and Engineering, Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Palacky University, Olomouc, Czech Republic
| | - Robin H A Ras
- Department of Applied Physics, School of Science, Aalto University, Espoo, Finland
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Espoo, Finland
| | - Joanna Aizenberg
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, USA
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Wolfgang H Goldmann
- Department of Physics, Biophysics Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.
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22
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Buchmann D, Schwabe M, Weiss R, Kuss AW, Schaufler K, Schlüter R, Rödiger S, Guenther S, Schultze N. Natural phenolic compounds as biofilm inhibitors of multidrug-resistant Escherichia coli - the role of similar biological processes despite structural diversity. Front Microbiol 2023; 14:1232039. [PMID: 37731930 PMCID: PMC10507321 DOI: 10.3389/fmicb.2023.1232039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 08/08/2023] [Indexed: 09/22/2023] Open
Abstract
Multidrug-resistant gram-negative pathogens such as Escherichia coli have become increasingly difficult to treat and therefore alternative treatment options are needed. Targeting virulence factors like biofilm formation could be one such option. Inhibition of biofilm-related structures like curli and cellulose formation in E. coli has been shown for different phenolic natural compounds like epigallocatechin gallate. This study demonstrates this effect for other structurally unrelated phenolics, namely octyl gallate, scutellarein and wedelolactone. To verify whether these structurally different compounds influence identical pathways of biofilm formation in E. coli a broad comparative RNA-sequencing approach was chosen with additional RT-qPCR to gain initial insights into the pathways affected at the transcriptomic level. Bioinformatical analysis of the RNA-Seq data was performed using DESeq2, BioCyc and KEGG Mapper. The comparative bioinformatics analysis on the pathways revealed that, irrespective of their structure, all compounds mainly influenced similar biological processes. These pathways included bacterial motility, chemotaxis, biofilm formation as well as metabolic processes like arginine biosynthesis and tricarboxylic acid cycle. Overall, this work provides the first insights into the potential mechanisms of action of novel phenolic biofilm inhibitors and highlights the complex regulatory processes of biofilm formation in E. coli.
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Affiliation(s)
- David Buchmann
- Pharmaceutical Biology, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Michael Schwabe
- Pharmaceutical Microbiology, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Romano Weiss
- Institute of Biotechnology, Faculty Environment and Natural Sciences, Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Germany
| | - Andreas W. Kuss
- Department of Functional Genomics, Interfaculty Institute of Genetics and Functional Genomics, University of Greifswald, Greifswald, Germany
| | - Katharina Schaufler
- Pharmaceutical Microbiology, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
- Institute of Infection Medicine, Christian-Albrecht University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Rabea Schlüter
- Imaging Center of the Department of Biology, University of Greifswald, Greifswald, Germany
| | - Stefan Rödiger
- Institute of Biotechnology, Faculty Environment and Natural Sciences, Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Germany
| | - Sebastian Guenther
- Pharmaceutical Biology, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Nadin Schultze
- Pharmaceutical Biology, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
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23
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Wu S, Xu Y, Chen Z, Chen Y, Wei F, Xia C, Zhou Q, Li P, Gu Q. Lactiplantibacillus plantarum ZJ316 Reduces Helicobacter pylori Adhesion and Inflammation by Inhibiting the Expression of Adhesin and Urease Genes. Mol Nutr Food Res 2023; 67:e2300241. [PMID: 37485583 DOI: 10.1002/mnfr.202300241] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/02/2023] [Indexed: 07/25/2023]
Abstract
SCOPE The present study aims to investigate the anti-Helicobacter pylori (H. pylori) effects of Lactiplantibacillus plantarum ZJ316 (L. plantarum ZJ316) both in vitro and in vivo. METHODS AND RESULTS This study finds that L. plantarum ZJ316 effectively suppresses H. pylori adhesion in inhibition (Pre-ZJ316), competition (Co-ZJ316), and displacement (Post-ZJ316) assays, and Pre-ZJ316 displaying the most potent inhibitory effect with an impressive inhibition ratio of 70.14%. Upon anti-adhesion, L. plantarum ZJ316 significantly downregulates the expression of H. pylori virulence genes, including ureA, ureB, flaA, and sabA, with inhibition ratios of 46.83%, 24.02%, 21.42%, and 62.38% at 2 h, respectively. In addition, L. plantarum ZJ316 is observed to reduce the level of interleukin 8 (IL-8) and improve cell viability in infected AGS cells. Furthermore, in vivo studies show that supplementation with L. plantarum ZJ316 effectively hinders H. pylori colonization and significantly suppresses the infiltration of immune cells and IL-8 production with H. pylori infection, protecting host from inflammatory damage. CONCLUSION L. plantarum ZJ316 exhibits excellent adhesion inhibition on H. pylori, and may be used as a probiotic candidate in the prevention or adjuvant therapy of gastric disease caused by H. pylori.
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Affiliation(s)
- Shiying Wu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Yang Xu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Ziqi Chen
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Yongqiang Chen
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Fangtong Wei
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Chenlan Xia
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Qingqing Zhou
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Ping Li
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
| | - Qing Gu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310018, China
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24
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Wu J, Liu C, Wang R, Yan S, Chen B, Zhu X. Enhanced bacterial adhesion force by rifampicin resistance promotes microbial colonization on PE plastic compared to non-resistant biofilm formation. WATER RESEARCH 2023; 242:120319. [PMID: 37441870 DOI: 10.1016/j.watres.2023.120319] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023]
Abstract
The microbial biofilm formed on plastics, is ubiquitous in the environment. However, the effects of antibiotic resistance on the development of the biofilm on plastics, especially with regard to initial cell attachment, remain unclear. In this study, we investigated the initial bacterial adhesion and subsequent biofilm growth of a rifampin (Rif) resistant E. coli (RRE) and a normal gram-positive B. subtilis on a typical plastic (polyethylene, PE). The experiments were conducted in different antibiotic solutions, including Rif, sulfamethoxazole (SMX), and kanamycin (KM), with concentrations ranging from 1 to 1000 μg/L to simulate different aquatic environments. The AFM-based single-cell adhesion force determination revealed that Rif resistance strengthened the adhesion force of RRE to PE in the environment rich in Rif rather than SMX and KM. The enhanced adhesion force may be due to the higher secretion of extracellular polymeric substances (EPS), particularly proteins, by RRE in the presence of Rif compared to the other two antibiotics. In addition, the higher ATP level of RRE would facilitate the initial adhesion and subsequent biofilm growth. Transcriptome analysis of RRE separately cultured in Rif and SMX environments demonstrated a clear correlation between the expression of Rif resistance and the augmented bacterial adhesion and cellular activity. Biofilm biomass analysis confirmed the promotion effect of Rif resistance on biofilm growth when compared to non-resistant biofilms, establishing a novel association with the augmentation of microbial adhesion force. Our study highlights concerns related to the dissemination of antibiotic resistance during microbial colonization on plastic that may arise from antibiotic resistance.
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Affiliation(s)
- Jiayi Wu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Congcong Liu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Rui Wang
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Saitao Yan
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiaoying Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China.
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25
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Sun J, Wang K, Hao R, Zhang Z, Feng Z, Shi Z, Yuan W, Jing Z, Zhang L. Disregarded Free Chains Affect Bacterial Adhesion on Cross-Linked Polydimethylsiloxane Surfaces. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37466242 DOI: 10.1021/acsami.3c05477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
The surface properties exhibited by chemically cross-linked polydimethylsiloxanes (CPDMS) such as morphology, stiffness, and wettability have garnered great interest in the study of bacteria-material interactions. Nevertheless, the hidden factor of uncross-linked free PDMS chains that dissociate in CPDMS has often been overlooked when studying the biofilm formation on these polymeric elastomer surfaces. Here, we undertake a comparative characterization of the effects of free chains in CPDMS on bacterial adhesion to both flat and textured Sharklet CPDMS surfaces. Surprisingly, compared to unextracted surfaces, removing free chains from flat and textured CPDMS through solvent extraction results in a tremendous increase in bacterial colony-forming units for both Gram-negative and Gram-positive bacteria up to 2-3 orders in the initial adhesion stage of 2 h. These findings demonstrate that the solvent extraction of free chains from CPDMS is essential in studying the interactions between bacteria and silicone elastomer materials when focusing on a single variable.
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Affiliation(s)
- Jining Sun
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China
| | - Kunwen Wang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ruonan Hao
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhiyuan Zhang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhongyu Feng
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhenqiang Shi
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wenjie Yuan
- School of Bioengineering, Dalian University of Technology, Dalian 116024, China
| | - Zhanyu Jing
- School of Bioengineering, Dalian University of Technology, Dalian 116024, China
| | - Lei Zhang
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China
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26
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Sidner B, Lerma A, Biswas B, Ronish LA, McCullough H, Auchtung JM, Piepenbrink KH. Flagellin is essential for initial attachment to mucosal surfaces by Clostridioides difficile. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.19.541533. [PMID: 37292962 PMCID: PMC10245794 DOI: 10.1101/2023.05.19.541533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Mucins are glycoproteins which can be found in host cell membranes and as a gelatinous surface formed from secreted mucins. Mucosal surfaces in mammals form a barrier to invasive microbes, particularly bacteria, but are a point of attachment for others. Clostridioides difficile is anaerobic bacterium which colonizes the mammalian GI tract and is a common cause of acute GI inflammation leading to a variety of negative outcomes. Although C. difficile toxicity stems from secreted toxins, colonization is a prerequisite for C. difficile disease. While C. difficile is known to associate with the mucus layer and underlying epithelium, the mechanisms underlying these interactions that facilitate colonization are less well-understood. To understand the molecular mechanisms by which C. difficile interacts with mucins, we used ex vivo mucosal surfaces to test the ability of C. difficile to bind to mucins from different mammalian tissues. We found significant differences in C. difficile adhesion based upon the source of mucins, with highest levels of binding observed to mucins purified from the human colonic adenocarcinoma line LS174T and lowest levels of binding to porcine gastric mucin. We also observed that defects in adhesion by mutants deficient in flagella, but not type IV pili. These results imply that interactions between host mucins and C. difficile flagella facilitate the initial host attachment of C. difficile to host cells and secreted mucus.
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27
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van den Berg D, Asker D, Awad TS, Lavielle N, Hatton BD. Mechanical deformation of elastomer medical devices can enable microbial surface colonization. Sci Rep 2023; 13:7691. [PMID: 37169828 PMCID: PMC10175502 DOI: 10.1038/s41598-023-34217-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 04/26/2023] [Indexed: 05/13/2023] Open
Abstract
Elastomers such as silicone are common in medical devices (catheters, prosthetic implants, endoscopes), but they remain prone to microbial colonization and biofilm infections. For the first time, our work shows that rates of microbial surface attachment to polydimethylsiloxane (PDMS) silicone can be significantly affected by mechanical deformation. For a section of bent commercial catheter tubing, bacteria (P. aeruginosa) show a strong preference for the 'convex' side compared to the 'concave' side, by a factor of 4.2. Further testing of cast PDMS materials in bending only showed a significant difference for samples that were manually wiped (damaged) beforehand (1.75 × 104 and 6.02 × 103 cells/mm2 on the convex and concave sides, respectively). We demonstrate that surface microcracks in elastomers are opened under tensile stress (convex bending) to become 'activated' as sites for microbial colonization. This work demonstrates that the high elastic limit of elastomers enables these microcracks to reversibly open and close, as 'dynamic defects'. Commercial catheters have relatively high surface roughness inherent to manufacturing, but we show that even manual wiping of newly-cast PDMS is sufficient to generate surface microcracks. We consider the implication for medical devices that feature sustained, surgical, or cyclic deformation, in which localized tensile conditions may expose these surface defects to opportunistic microbes. As a result, our work showcases serious potential problems in the widespread usage and development of elastomers in medical devices.
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Affiliation(s)
| | - Dalal Asker
- Department of Materials Science and Engineering, University of Toronto, Toronto, Canada
- Food Science & Technology Department, Alexandria University, Alexandria, Egypt
| | - Tarek S Awad
- Department of Materials Science and Engineering, University of Toronto, Toronto, Canada
| | - Nicolas Lavielle
- Physique et Mécanique des Milieux Hétérogènes, CNRS, ESPCI, PSL Research University, Sorbonne Université, Sorbonne Paris Cité, 75005, Paris, France
| | - Benjamin D Hatton
- Department of Materials Science and Engineering, University of Toronto, Toronto, Canada.
- Institute of Biomedical Engineering, University of Toronto, Toronto, Canada.
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28
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Wang G, Tang K, Jiang W, Liao Q, Li Y, Liu P, Wu Y, Liu M, Wang H, Li B, Du J, Chu PK. Quantifiable Relationship Between Antibacterial Efficacy and Electro-Mechanical Intervention on Nanowire Arrays. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2212315. [PMID: 36738179 DOI: 10.1002/adma.202212315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/29/2023] [Indexed: 05/12/2023]
Abstract
Physical disruption is an important antibacterial means as it is lethal to bacteria without spurring antimicrobial resistance. However, it is very challenging to establish a quantifiable relationship between antibacterial efficacy and physical interactions such as mechanical and electrical forces. Herein, titanium nitride (TN) nanowires with adjustable orientations and capacitances are prepared to exert gradient electro-mechanical forces on bacteria. While vertical nanowires show the strongest mechanical force resulting in an antibacterial efficiency of 0.62 log reduction (vs 0.22 for tiled and 0.36 for inclined nanowires, respectively), the addition of electrical charges maximizes the electro-mechanical interactions and elevates the antibacterial efficacy to more than 3 log reduction. Biophysical and biochemical analyses indicate that electrostatic attraction by electrical charge narrows the interface. The electro-mechanical intervention more easily stiffens and rips the bacteria membrane, disturbing the electron balance and generating intracellular oxidative stress. The antibacterial ability is maintained in vivo and bacteria-challenged rats are protected from serious infection. The physical bacteria-killing process demonstrated here can be controlled by adjusting the electro-mechanical interactions. Overall, these results revealed important principles for rationally designing high-performance antibacterial interfaces for clinical applications.
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Affiliation(s)
- Guomin Wang
- Department of Orthopedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, P. R. China
- Department of Physics, Department of Materials Science and Engineering and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Kaiwei Tang
- Department of Physics, Department of Materials Science and Engineering and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
- School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China
| | - Wenjuan Jiang
- College of Pharmacy, Western University of Health Sciences, 309 E. Second St, Pomona, CA, 91766, USA
| | - Qing Liao
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Yong Li
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, P. R. China
| | - Pei Liu
- Department of Physics, Department of Materials Science and Engineering and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Yuzheng Wu
- Department of Physics, Department of Materials Science and Engineering and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Mengting Liu
- USC Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, 90033, USA
| | - Huaiyu Wang
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Bin Li
- Department of Orthopaedic Surgery, Orthopaedic Institute, First Affiliated Hospital, Medical College, Soochow University, Suzhou, Jiangsu, 215007, P. R. China
| | - Jianzhong Du
- Department of Orthopedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, P. R. China
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai, 201804, P. R. China
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
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29
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Butler J, Handy RD, Upton M, Besinis A. Review of Antimicrobial Nanocoatings in Medicine and Dentistry: Mechanisms of Action, Biocompatibility Performance, Safety, and Benefits Compared to Antibiotics. ACS NANO 2023; 17:7064-7092. [PMID: 37027838 PMCID: PMC10134505 DOI: 10.1021/acsnano.2c12488] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
This review discusses topics relevant to the development of antimicrobial nanocoatings and nanoscale surface modifications for medical and dental applications. Nanomaterials have unique properties compared to their micro- and macro-scale counterparts and can be used to reduce or inhibit bacterial growth, surface colonization and biofilm development. Generally, nanocoatings exert their antimicrobial effects through biochemical reactions, production of reactive oxygen species or ionic release, while modified nanotopographies create a physically hostile surface for bacteria, killing cells via biomechanical damage. Nanocoatings may consist of metal nanoparticles including silver, copper, gold, zinc, titanium, and aluminum, while nonmetallic compounds used in nanocoatings may be carbon-based in the form of graphene or carbon nanotubes, or composed of silica or chitosan. Surface nanotopography can be modified by the inclusion of nanoprotrusions or black silicon. Two or more nanomaterials can be combined to form nanocomposites with distinct chemical or physical characteristics, allowing combination of different properties such as antimicrobial activity, biocompatibility, strength, and durability. Despite their wide range of applications in medical engineering, questions have been raised regarding potential toxicity and hazards. Current legal frameworks do not effectively regulate antimicrobial nanocoatings in matters of safety, with open questions remaining about risk analysis and occupational exposure limits not considering coating-based approaches. Bacterial resistance to nanomaterials is also a concern, especially where it may affect wider antimicrobial resistance. Nanocoatings have excellent potential for future use, but safe development of antimicrobials requires careful consideration of the "One Health" agenda, appropriate legislation, and risk assessment.
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Affiliation(s)
- James Butler
- School
of Engineering, Computing and Mathematics, Faculty of Science and
Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
| | - Richard D. Handy
- School
of Biological and Marine Sciences, Faculty of Science and Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
| | - Mathew Upton
- School
of Biomedical Sciences, Faculty of Health, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United
Kingdom
| | - Alexandros Besinis
- School
of Engineering, Computing and Mathematics, Faculty of Science and
Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
- Peninsula
Dental School, Faculty of Health, University
of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
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30
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Caykara T, Fernandes S, Braga A, Rodrigues J, Rodrigues LR, Silva CJ. Can Superhydrophobic PET Surfaces Prevent Bacterial Adhesion? NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1117. [PMID: 36986011 PMCID: PMC10058955 DOI: 10.3390/nano13061117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/06/2023] [Accepted: 03/12/2023] [Indexed: 06/18/2023]
Abstract
Prevention of bacterial adhesion is a way to reduce and/or avoid biofilm formation, thus restraining its associated infections. The development of repellent anti-adhesive surfaces, such as superhydrophobic surfaces, can be a strategy to avoid bacterial adhesion. In this study, a polyethylene terephthalate (PET) film was modified by in situ growth of silica nanoparticles (NPs) to create a rough surface. The surface was further modified with fluorinated carbon chains to increase its hydrophobicity. The modified PET surfaces presented a pronounced superhydrophobic character, showing a water contact angle of 156° and a roughness of 104 nm (a considerable increase comparing with the 69° and 4.8 nm obtained for the untreated PET). Scanning Electron Microscopy was used to evaluate the modified surfaces morphology, further confirming its successful modification with nanoparticles. Additionally, a bacterial adhesion assay using an Escherichia coli expressing YadA, an adhesive protein from Yersinia so-called Yersinia adhesin A, was used to assess the anti-adhesive potential of the modified PET. Contrarily to what was expected, adhesion of E. coli YadA was found to increase on the modified PET surfaces, exhibiting a clear preference for the crevices. This study highlights the role of material micro topography as an important attribute when considering bacterial adhesion.
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Affiliation(s)
- Tugce Caykara
- CENTI-Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal
- CEB-Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Sara Fernandes
- CENTI-Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal
| | - Adelaide Braga
- CEB-Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Joana Rodrigues
- CEB-Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Ligia R. Rodrigues
- CEB-Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Carla Joana Silva
- CENTI-Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal
- CITEVE-Portuguese Technological Centre for the Textile and Clothing Industries, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal
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31
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Pauli B, Ajmera S, Kost C. Determinants of synergistic cell-cell interactions in bacteria. Biol Chem 2023; 404:521-534. [PMID: 36859766 DOI: 10.1515/hsz-2022-0303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 02/08/2023] [Indexed: 03/03/2023]
Abstract
Bacteria are ubiquitous and colonize virtually every conceivable habitat on earth. To achieve this, bacteria require different metabolites and biochemical capabilities. Rather than trying to produce all of the needed materials by themselves, bacteria have evolved a range of synergistic interactions, in which they exchange different commodities with other members of their local community. While it is widely acknowledged that synergistic interactions are key to the ecology of both individual bacteria and entire microbial communities, the factors determining their establishment remain poorly understood. Here we provide a comprehensive overview over our current knowledge on the determinants of positive cell-cell interactions among bacteria. Taking a holistic approach, we review the literature on the molecular mechanisms bacteria use to transfer commodities between bacterial cells and discuss to which extent these mechanisms favour or constrain the successful establishment of synergistic cell-cell interactions. In addition, we analyse how these different processes affect the specificity among interaction partners. By drawing together evidence from different disciplines that study the focal question on different levels of organisation, this work not only summarizes the state of the art in this exciting field of research, but also identifies new avenues for future research.
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Affiliation(s)
- Benedikt Pauli
- Department of Ecology, School of Biology/Chemistry, Osnabrück University, D-49076 Osnabrück, Germany
| | - Shiksha Ajmera
- Department of Ecology, School of Biology/Chemistry, Osnabrück University, D-49076 Osnabrück, Germany
| | - Christian Kost
- Department of Ecology, School of Biology/Chemistry, Osnabrück University, D-49076 Osnabrück, Germany.,Center of Cellular Nanoanalytics (CellNanOs), Osnabrück University, Barbarastrasse 11, D-49076 Osnabrück, Germany
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32
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Zhai H, Yeo J. Computational Design of Antimicrobial Active Surfaces via Automated Bayesian Optimization. ACS Biomater Sci Eng 2023; 9:269-279. [PMID: 36537745 DOI: 10.1021/acsbiomaterials.2c01079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Biofilms pose significant problems for engineers in diverse fields, such as marine science, bioenergy, and biomedicine, where effective biofilm control is a long-term goal. The adhesion and surface mechanics of biofilms play crucial roles in generating and removing biofilm. Designing customized nanosurfaces with different surface topologies can alter the adhesive properties to remove biofilms more easily and greatly improve long-term biofilm control. To rapidly design such topologies, we employ individual-based modeling and Bayesian optimization to automate the design process and generate different active surfaces for effective biofilm removal. Our framework successfully generated optimized functional nanosurfaces for improved biofilm removal through applied shear and vibration. Densely distributed short pillar topography is the optimal geometry to prevent biofilm formation. Under fluidic shearing, the optimal topography is to sparsely distribute tall, slim, pillar-like structures. When subjected to either vertical or lateral vibrations, thick trapezoidal cones are found to be optimal. Optimizing the vibrational loading indicates a small vibration magnitude with relatively low frequencies is more efficient in removing biofilm. Our results provide insights into various engineering fields that require surface-mediated biofilm control. Our framework can also be applied to more general materials design and optimization.
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Affiliation(s)
- Hanfeng Zhai
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York14850, United States
| | - Jingjie Yeo
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York14850, United States
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33
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Wang J, Li P, Wang N, Wang J, Xing D. Antibacterial features of material surface: strong enough to serve as antibiotics? J Mater Chem B 2023; 11:280-302. [PMID: 36533438 DOI: 10.1039/d2tb02139k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bacteria are small but need big efforts to control. The use of antibiotics not only produces superbugs that are increasingly difficult to inactivate, but also raises environmental concerns with the growing consumption. It is now believed that the antibacterial task can count on some physiochemical features of material surfaces, which can be anti-adhesive or bactericidal without releasing toxicants. It is necessary to evaluate to what extent can we rely on the surface design since the actual application scenarios will need the antibacterial performance to be sharp, robust, environmentally friendly, and long-lasting. Herein, we review the recent laboratory advances that have been classified based on the specific surface features, including hydrophobicity, charge potential, micromorphology, stiffness and viscosity, and photoactivity, and the antibacterial mechanisms of each feature are included to provide a basic rationale for future design. The significance of anti-biofilms is also introduced, given the big role of biofilms in bacteria-caused damage. A perspective on the potential wide application of antibacterial surface features as a substitute or supplement to antibiotics is then discussed. Surface design is no doubt a solution worthy to explore, and future success will be a result of further progress in multiple directions, including mechanism study and material preparation.
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Affiliation(s)
- Jie Wang
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China. .,CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China.
| | - Ping Li
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao 266071, China
| | - Ning Wang
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China.
| | - Jing Wang
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China.
| | - Dongming Xing
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China.
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Li Q, Wen C, Yang J, Zhou X, Zhu Y, Zheng J, Cheng G, Bai J, Xu T, Ji J, Jiang S, Zhang L, Zhang P. Zwitterionic Biomaterials. Chem Rev 2022; 122:17073-17154. [PMID: 36201481 DOI: 10.1021/acs.chemrev.2c00344] [Citation(s) in RCA: 130] [Impact Index Per Article: 65.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The term "zwitterionic polymers" refers to polymers that bear a pair of oppositely charged groups in their repeating units. When these oppositely charged groups are equally distributed at the molecular level, the molecules exhibit an overall neutral charge with a strong hydration effect via ionic solvation. The strong hydration effect constitutes the foundation of a series of exceptional properties of zwitterionic materials, including resistance to protein adsorption, lubrication at interfaces, promotion of protein stabilities, antifreezing in solutions, etc. As a result, zwitterionic materials have drawn great attention in biomedical and engineering applications in recent years. In this review, we give a comprehensive and panoramic overview of zwitterionic materials, covering the fundamentals of hydration and nonfouling behaviors, different types of zwitterionic surfaces and polymers, and their biomedical applications.
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Affiliation(s)
- Qingsi Li
- Department of Biochemical Engineering, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
| | - Chiyu Wen
- Department of Biochemical Engineering, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
| | - Jing Yang
- Department of Biochemical Engineering, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
| | - Xianchi Zhou
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Yingnan Zhu
- Institute of Drug Discovery and Development, School of Pharmaceutical Sciences, Center for Drug Safety Evaluation and Research, Zhengzhou University, Zhengzhou 450001, China
| | - Jie Zheng
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Gang Cheng
- Department of Chemical Engineering, The University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Jie Bai
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China
| | - Tong Xu
- College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China
| | - Jian Ji
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Shaoyi Jiang
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Lei Zhang
- Department of Biochemical Engineering, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
| | - Peng Zhang
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
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Gill AK, Shah S, Yadav P, Shanavas A, Neelakandan PP, Patra D. A visible-light activated ROS generator multilayer film for antibacterial coatings. J Mater Chem B 2022; 10:9869-9877. [PMID: 36437801 DOI: 10.1039/d2tb01454h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The current scenario of antibiotic-resistant bacteria and pandemics caused by viruses makes research in the area of antibacterial and antiviral materials and surfaces more urgent than ever. In this regard, salicylideneimine based tetracoordinate boron-containing organic compounds are emerging as a new class of photosensitizers for singlet oxygen generation. However, the inherent inability of small organic molecules to be processed limits their potential use in functional coatings. Here we show the synthesis of a novel polymer functionalized with diiodosalicylideneimine-boron difluoride (PEI-BF2) and its utility for surface coating inside glass vials via layer-by-layer (LbL) assembly. The multilayer thin films are characterized using AFM and UV-Vis spectroscopy and the resultant coatings display excellent stability. The multilayer coating could be activated using visible light, and owing to the photocatalytic activity of the incorporated PEI-BF2, the surface coating is able to generate singlet oxygen efficiently upon light irradiation. Further, the multilayer coated surfaces exhibit remarkable antimicrobial activity towards both Gram-positive and Gram-negative bacteria under a variety of conditions. Thus, owing to the simple synthesis and the convenient methodology adopted for the preparation of multilayer coatings, the material reported here could pave the way for the development of sunlight activated large area self-sterile surfaces.
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Affiliation(s)
- Arshdeep Kaur Gill
- Institute of Nano Science and Technology, Sector - 81, Mohali - 140306, Punjab, India. .,Centre for Nanoscience and Nanotechnology, Panjab University, Sector-25, Chandigarh - 160036, India
| | - Sanchita Shah
- Institute of Nano Science and Technology, Sector - 81, Mohali - 140306, Punjab, India.
| | - Pranjali Yadav
- Institute of Nano Science and Technology, Sector - 81, Mohali - 140306, Punjab, India.
| | - Asifkhan Shanavas
- Institute of Nano Science and Technology, Sector - 81, Mohali - 140306, Punjab, India.
| | - Prakash P Neelakandan
- Institute of Nano Science and Technology, Sector - 81, Mohali - 140306, Punjab, India.
| | - Debabrata Patra
- Institute of Nano Science and Technology, Sector - 81, Mohali - 140306, Punjab, India.
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36
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Flagellar Phenotypes Impact on Bacterial Transport and Deposition Behavior in Porous Media: Case of Salmonella enterica Serovar Typhimurium. Int J Mol Sci 2022; 23:ijms232214460. [PMID: 36430938 PMCID: PMC9698738 DOI: 10.3390/ijms232214460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/11/2022] [Accepted: 11/16/2022] [Indexed: 11/23/2022] Open
Abstract
Bacterial contamination of groundwater has always been an ecological problem worthy of attention. In this study, Salmonella enterica serovar Typhimurium with different flagellar phenotypes mainly characterized during host-pathogen interaction were analyzed for their transport and deposition behavior in porous media. Column transport experiments and a modified mobile-immobile model were applicated on different strains with flagellar motility (wild-type) or without motility (ΔmotAB), without flagella (ΔflgKL), methylated and unmethylated flagellin (ΔfliB), and different flagella phases (fliCON, fljBON). Results showed that flagella motility could promote bacterial transport and deposition due to their biological advantages of moving and attaching to surfaces. We also found that the presence of non-motile flagella improved bacterial adhesion according to a higher retention rate of the ΔmotAB strain compared to the ΔflgKL strain. This indicated that bacteria flagella and motility both had promoting effects on bacterial deposition in sandy porous media. Flagella phases influenced the bacterial movement; the fliCON strain went faster through the column than the fljBON strain. Moreover, flagella methylation was found to favor bacterial transport and deposition. Overall, flagellar modifications affect Salmonella enterica serovar Typhimurium transport and deposition behavior in different ways in environmental conditions.
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Xu LC, Siedlecki CA. Surface Texturing and Combinatorial Approaches to Improve Biocompatibility of Implanted Biomaterials. FRONTIERS IN PHYSICS 2022; 10:994438. [PMID: 38250242 PMCID: PMC10798815 DOI: 10.3389/fphy.2022.994438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Biomaterial associated microbial infection and blood thrombosis are two of the barriers that inhibit the successful use of implantable medical devices in modern healthcare. Modification of surface topography is a promising approach to combat microbial infection and thrombosis without altering bulk material properties necessary for device function and without contributing to bacterial antibiotic resistance. Similarly, the use of other antimicrobial techniques such as grafting poly(ethylene glycol) (PEG) and nitric oxide (NO) release also improve the biocompatibility of biomaterials. In this review, we discuss the development of surface texturing techniques utilizing ordered submicron-size pillars for controlling bacterial adhesion and biofilm formation, and we present combinatorial approaches utilizing surface texturing in combination with poly(ethylene glycol) (PEG) grafting and NO release to improve the biocompatibility of biomaterials. The manuscript also discusses efforts towards understanding the molecular mechanisms of bacterial adhesion responses to the surface texturing and NO releasing biomaterials, focusing on experimental aspects of the approach.
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Affiliation(s)
- Li-Chong Xu
- Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA 17033
| | - Christopher A. Siedlecki
- Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA 17033
- Department of Biomedical Engineering, The Pennsylvania State University, College of Medicine, Hershey, PA 17033
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38
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Raya D, Shreya A, Kumar A, Giri SK, Salem DR, Gnimpieba EZ, Gadhamshetty V, Dhiman SS. Molecular regulation of conditioning film formation and quorum quenching in sulfate reducing bacteria. Front Microbiol 2022; 13:1008536. [PMID: 36386676 PMCID: PMC9659907 DOI: 10.3389/fmicb.2022.1008536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/26/2022] [Indexed: 09/19/2023] Open
Abstract
Sensing surface topography, an upsurge of signaling biomolecules, and upholding cellular homeostasis are the rate-limiting spatio-temporal events in microbial attachment and biofilm formation. Initially, a set of highly specialized proteins, viz. conditioning protein, directs the irreversible attachment of the microbes. Later signaling molecules, viz. autoinducer, take over the cellular communication phenomenon, resulting in a mature microbial biofilm. The mandatory release of conditioning proteins and autoinducers corroborated the existence of two independent mechanisms operating sequentially for biofilm development. However, both these mechanisms are significantly affected by the availability of the cofactor, e.g., Copper (Cu). Generally, the Cu concentration beyond threshold levels is detrimental to the anaerobes except for a few species of sulfate-reducing bacteria (SRB). Remarkably SRB has developed intricate ways to resist and thrive in the presence of Cu by activating numerous genes responsible for modifying the presence of more toxic Cu(I) to Cu(II) within the periplasm, followed by their export through the outer membrane. Therefore, the determinants of Cu toxicity, sequestration, and transportation are reconnoitered for their contribution towards microbial adaptations and biofilm formation. The mechanistic details revealing Cu as a quorum quencher (QQ) are provided in addition to the three pathways involved in the dissolution of cellular communications. This review articulates the Machine Learning based data curing and data processing for designing novel anti-biofilm peptides and for an in-depth understanding of QQ mechanisms. A pioneering data set has been mined and presented on the functional properties of the QQ homolog in Oleidesulfovibrio alaskensis G20 and residues regulating the multicopper oxidase properties in SRB.
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Affiliation(s)
- Dheeraj Raya
- Department of Civil and Environmental Engineering, South Dakota Mines, Rapid City, SD, United States
- 2DBEST Research Center, South Dakota Mines, Rapid City, SD, United States
| | - Aritree Shreya
- Department of Civil and Environmental Engineering, South Dakota Mines, Rapid City, SD, United States
- 2DBEST Research Center, South Dakota Mines, Rapid City, SD, United States
| | - Anil Kumar
- Centre for Medical Biotechnology, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Shiv Kumar Giri
- Department of Biotechnology, Maharaja Agrasen University, Baddi, Himachal Pradesh, India
| | - David R. Salem
- Chemical and Biological Engineering, South Dakota Mines, Rapid City, SD, United States
| | - Etienne Z. Gnimpieba
- 2DBEST Research Center, South Dakota Mines, Rapid City, SD, United States
- Department of Biomedical Engineering, University of South Dakota, Vermillion, SD, United States
| | - Venkataramana Gadhamshetty
- Department of Civil and Environmental Engineering, South Dakota Mines, Rapid City, SD, United States
- 2DBEST Research Center, South Dakota Mines, Rapid City, SD, United States
| | - Saurabh Sudha Dhiman
- Department of Civil and Environmental Engineering, South Dakota Mines, Rapid City, SD, United States
- 2DBEST Research Center, South Dakota Mines, Rapid City, SD, United States
- Department of Chemistry, Biology and Health Sciences, South Dakota Mines, Rapid City, SD, United States
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Halsted MC, Bible AN, Morrell-Falvey JL, Retterer ST. Quantifying biofilm propagation on chemically modified surfaces. Biofilm 2022; 4:100088. [PMID: 36303845 PMCID: PMC9594113 DOI: 10.1016/j.bioflm.2022.100088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/26/2022] [Accepted: 10/14/2022] [Indexed: 11/07/2022] Open
Abstract
Conditions affecting biofilm formation differ among bacterial species and this presents a challenge to studying biofilms in the lab. This work leverages functionalized silanes to control surface chemistry in the study of early biofilm propagation, quantified with a semi-automated image processing algorithm. These methods support the study of Pantoea sp. YR343, a gram-negative bacterium isolated from the poplar rhizosphere. We found that Pantoea sp. YR343 does not readily attach to hydrophilic surfaces but will form biofilms with a “honeycomb” morphology on hydrophobic surfaces. Our image processing algorithm described here quantified the evolution of the honeycomb morphology over time, and found the propagation to display a logarithmic behavior. This methodology was repeated with a flagella-deficient fliR mutant of Pantoea sp. YR343 which resulted in reduced surface attachment. Quantifiable differences between Pantoea WT and ΔfliR biofilm morphologies were captured by the image processing algorithm, further demonstrating the insight gained from these methods.
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Affiliation(s)
| | - Amber N. Bible
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | - Scott T. Retterer
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA,Center for Nanophase Materials Sciences, Oak Ridge, TN, USA,Corresponding author. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
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40
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Antibacterial Adhesion Strategy for Dental Titanium Implant Surfaces: From Mechanisms to Application. J Funct Biomater 2022; 13:jfb13040169. [PMID: 36278638 PMCID: PMC9589972 DOI: 10.3390/jfb13040169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 09/25/2022] [Accepted: 09/26/2022] [Indexed: 11/17/2022] Open
Abstract
Dental implants are widely used to restore missing teeth because of their stability and comfort characteristics. Peri-implant infection may lead to implant failure and other profound consequences. It is believed that peri-implantitis is closely related to the formation of biofilms, which are difficult to remove once formed. Therefore, endowing titanium implants with anti-adhesion properties is an effective method to prevent peri-implant infection. Moreover, anti-adhesion strategies for titanium implant surfaces are critical steps for resisting bacterial adherence. This article reviews the process of bacterial adhesion, the material properties that may affect the process, and the anti-adhesion strategies that have been proven effective and promising in practice. This article intends to be a reference for further improvement of the antibacterial adhesion strategy in clinical application and for related research on titanium implant surfaces.
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41
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Shave MK, Santore MM. Motility Increases the Numbers and Durations of Cell-Surface Engagements for Escherichia coli Flowing near Poly(ethylene glycol)-Functionalized Surfaces. ACS APPLIED MATERIALS & INTERFACES 2022; 14:34342-34353. [PMID: 35857760 PMCID: PMC9674025 DOI: 10.1021/acsami.2c05936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Bacteria are keenly sensitive to properties of the surfaces they contact, regulating their ability to form biofilms and initiate infections. This study examines how the presence of flagella, interactions between the cell body and the surface, or motility itself guides the dynamic contact between bacterial cells and a surface in flow, potentially enabling cells to sense physicochemical and mechanical properties of surfaces. This work focuses on a poly(ethylene glycol) biomaterial coating, which does not retain cells. In a comparison of four Escherichia coli strains with different flagellar expressions and motilities, cells with substantial run-and-tumble swimming motility exhibited increased flux to the interface (3 times the calculated transport-limited rate which adequately described the non-motile cells), greater proportions of cells engaging in dynamic nanometer-scale surface associations, extended times of contact with the surface, increased probability of return to the surface after escape and, as evidenced by slow velocities during near-surface travel, closer cellular approach. All these metrics, reported here as distributions of cell populations, point to a greater ability of motile cells, compared with nonmotile cells, to interact more closely, forcefully, and for greater periods of time with interfaces in flow. With contact durations of individual cells exceeding 10 s in the window of observation and trends suggesting further interactions beyond the field of view, the dynamic contact of individual cells may approach the minute timescales reported for mechanosensing and other cell recognition pathways. Thus, despite cell translation and the dynamic nature of contact, flow past a surface, even one rendered non-cell arresting by use of an engineered coating, may produce a subpopulation of cells already upregulating virulence factors before they arrest on a downstream surface and formally initiate biofilm formation.
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Affiliation(s)
| | - Maria M. Santore
- corresponding author: Maria Santore, Department of Polymer Science and Engineering, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, 413-577-1417,
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42
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Zhang W, Mi X, Zhang C, Cheng Y, Wang S, Ji J, Yuan Y, Wang L, Liu W, Jiang Y. Meat-derived Escherichia coli and Pseudomonas fragi manage to co-exist in dual-species biofilms by adjusting gene-regulated competitive strength. Food Microbiol 2022; 109:104122. [DOI: 10.1016/j.fm.2022.104122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/19/2022] [Accepted: 08/20/2022] [Indexed: 10/15/2022]
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43
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Zhang Z, Ni BJ, Zhang L, Liu Z, Fu W, Dai X, Sun J. Medium-chain fatty acids production from carbohydrates-rich wastewater through two-stage yeast biofilm processes without external electron donor addition: Biofilm development and pH impact. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154428. [PMID: 35276160 DOI: 10.1016/j.scitotenv.2022.154428] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 05/12/2023]
Abstract
The production of medium-chain fatty acids (MCFAs) is considered promising for carbon resource recovery from waste streams. However, a large quantity of external electron donors are often required, causing great cost and environmental impact. Therefore, in this study, a two-stage technology was developed to produce MCFAs from carbohydrate-rich wastewater without external electron donor addition, with the biofilm development and pH impact being explored. Stage I aimed at converting organics into ethanol and a yeast biofilm reactor is innovatively applied. The results showed that the yeast biofilm could quickly form on carriers with steady-state thickness reaching 50-200 μm. However, the attachment of yeast biofilm was weak at the initial stage so that the violent turbulence should be avoided during operation. The polyurethane foam was the most suitable for yeast biofilm development among the tested carriers, as evidenced by the highest ethanol production, accounting for 74.2% of soluble organics. The Nakaseomyces was the main fungal genus in the steady-state biofilm, while lactic acid bacteria were also developed, resulting in lactate and acetate production. In Stage II, the yeast biofilm reactor effluent was applied for MCFA production at different pH (5-8). However, the MCFA production selectivity was significantly affected by pH, with 65.2% at pH of 5 but decreasing substantially to 3.0% at pH of 8. Both the microbial and electron transfer efficiency analysis suggested that mildly acidic pH can promote the electron transfer from ethanol toward the chain elongation process instead of its excessive oxidation. Thus, if conditions of online extraction or microbial tolerance permit, a lower pH should be recommended for Stage II in the developed technology as well as other ethanol-based MCFA production process. This is a conceptual study that eliminated external electron donor addition in MCFAs production and provide a sustainable and reliable way in carbon resources recovery.
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Affiliation(s)
- Zisha Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007, Australia
| | - Lu Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Zhitong Liu
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Weng Fu
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Jing Sun
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Hefei 230000, China.
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44
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Leonard H, Jiang X, Arshavsky-Graham S, Holtzman L, Haimov Y, Weizman D, Halachmi S, Segal E. Shining light in blind alleys: deciphering bacterial attachment in silicon microstructures. NANOSCALE HORIZONS 2022; 7:729-742. [PMID: 35616534 DOI: 10.1039/d2nh00130f] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
With new advances in infectious disease, antifouling surfaces, and environmental microbiology research comes the need to understand and control the accumulation and attachment of bacterial cells on a surface. Thus, we employ intrinsic phase-shift reflectometric interference spectroscopic measurements of silicon diffraction gratings to non-destructively observe the interactions between bacterial cells and abiotic, microstructured surfaces in a label-free and real-time manner. We conclude that the combination of specific material characteristics (i.e., substrate surface charge and topology) and characteristics of the bacterial cells (i.e., motility, cell charge, biofilm formation, and physiology) drive bacteria to adhere to a particular surface, often leading to a biofilm formation. Such knowledge can be exploited to predict antibiotic efficacy and biofilm formation, and enhance surface-based biosensor development, as well as the design of anti-biofouling strategies.
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Affiliation(s)
- Heidi Leonard
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Xin Jiang
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Sofia Arshavsky-Graham
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Liran Holtzman
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Yuri Haimov
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Daniel Weizman
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Sarel Halachmi
- Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, 3200003, Israel
- Department of Urology, Bnai Zion Medical Center, Haifa, 3104800, Israel
| | - Ester Segal
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
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45
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Sarvari R, Naghili B, Agbolaghi S, Abbaspoor S, Bannazadeh Baghi H, Poortahmasebi V, Sadrmohammadi M, Hosseini M. Organic/polymeric antibiofilm coatings for surface modification of medical devices. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2066668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Raana Sarvari
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Behrooz Naghili
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samira Agbolaghi
- Chemical Engineering Department, Faculty of Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
| | | | - Hossein Bannazadeh Baghi
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahdat Poortahmasebi
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehdi Sadrmohammadi
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Hosseini
- Chemical Engineering Department, Faculty of Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
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Santore MM. Interplay of physico-chemical and mechanical bacteria-surface interactions with transport processes controls early biofilm growth: A review. Adv Colloid Interface Sci 2022; 304:102665. [PMID: 35468355 DOI: 10.1016/j.cis.2022.102665] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 04/03/2022] [Accepted: 04/04/2022] [Indexed: 11/01/2022]
Abstract
Biofilms initiate when bacteria encounter and are retained on surfaces. The surface orchestrates biofilm growth through direct physico-chemical and mechanical interactions with different structures on bacterial cells and, in turn, through its influence on cell-cell interactions. Individual cells respond directly to a surface through mechanical or chemical means, initiating "surface sensing" pathways that regulate gene expression, for instance producing extra cellular matrix or altering phenotypes. The surface can also physically direct the evolving colony morphology as cells divide and grow. In either case, the physico-chemistry of the surface influences cells and cell communities through mechanisms that involve additional factors. For instance the numbers of cells arriving on a surface from solution relative to the generation of new cells by division depends on adhesion and transport kinetics, affecting early colony density and composition. Separately, the forces experienced by adhering cells depend on hydrodynamics, gravity, and the relative stiffnesses and viscoelasticity of the cells and substrate materials, affecting mechanosensing pathways. Physical chemistry and surface functionality, along with interfacial mechanics also influence cell-surface friction and control colony morphology, in particular 2D and 3D shape. This review focuses on the current understanding of the mechanisms in which physico-chemical interactions, deriving from surface functionality, impact individual cells and cell community behavior through their coupling with other interfacial processes.
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47
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Wang Y, Du X, Wang X, Yan T, Yuan M, Yang Y, Jurado-Sánchez B, Escarpa A, Xu LP. Patterned Liquid-Infused Nanocoating Integrating a Sensitive Bacterial Sensing Ability to an Antibacterial Surface. ACS APPLIED MATERIALS & INTERFACES 2022; 14:23129-23138. [PMID: 35537039 DOI: 10.1021/acsami.1c24821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The slippery liquid-infused surfaces show a great antibacterial property. However, most liquid-infused surfaces cannot detect whether or not the unknown aqueous samples contain microorganisms. Therefore, it is highly necessary but a challenge to integrate bacterial sensing capability into antibacterial surface. In this work, we prepared a slippery patterned liquid-infused nanocoating on the glass substrate for integrating bacterial sensing capability into the bacterial repellence surface. Dendritic mesoporous silica nanoparticles (DMSNs) with a suitable particle size of ca. 128 nm were employed as a building block to fabricate the multifunctional nanocoating with a superhydrophilic microwell and hydrophobic periphery by a dip-coating strategy, hydrophobic treatment, photomask-mediated plasma etching, and liquid infusion. Dendritic porous silica nanoparticles (DPSNs) with a larger particle size of ca. 260 nm were uniformly loaded with Au nanoparticles (NPs), providing large surface area for the modification of Raman reporter (4-mercaptobenzoic acid (4-MBA)) and aptamer. Thus, as a Raman tag, the formed DPSNs-Au-MBA-aptamer could achieve sensitive surface-enhanced Raman spectroscopy (SERS) detection of target bacteria. Combined with the Raman tag, the patterned liquid-infused nanocoating not only completely repelled bacteria on the hydrophobic area but also enabled sensitive SERS detection of Staphylococcus aureus in a very low sample volume (1 μL) with a low detection limit of 2.6 colony formation units (CFU)/mL on the antibody-modified superhydrophilic microwell. This research provided a novel and reliable strategy to construct a multifunctional nanocoating with microbial repellence and sensing capabilities.
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Affiliation(s)
- Yulu Wang
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, Madrid 28805, Spain
| | - Xin Du
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Xuan Wang
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Tingxiu Yan
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Mengqi Yuan
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Yuemeng Yang
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Beatriz Jurado-Sánchez
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, Madrid 28805, Spain
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, Madrid 28805, Spain
| | - Li-Ping Xu
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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48
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Ek V, Fattinger SA, Florbrant A, Hardt WD, Di Martino ML, Eriksson J, Sellin ME. A Motile Doublet Form of Salmonella Typhimurium Diversifies Target Search Behaviour at the Epithelial Surface. Mol Microbiol 2022; 117:1156-1172. [PMID: 35332598 PMCID: PMC9325389 DOI: 10.1111/mmi.14898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 02/24/2022] [Accepted: 03/21/2022] [Indexed: 12/01/2022]
Abstract
The behaviors of infectious bacteria are commonly studied in bulk. This is effective to define the general properties of a given isolate, but insufficient to resolve subpopulations and unique single‐microbe behaviors within the bacterial pool. We here employ microscopy to study single‐bacterium characteristics among Salmonella enterica serovar Typhimurium (S.Tm), as they prepare for and launch invasion of epithelial host cells. We find that during the bacterial growth cycle, S.Tm populations switch gradually from fast planktonic growth to a host cell‐invasive phenotype, characterized by flagellar motility and expression of the Type‐three‐secretion‐system‐1. The indistinct nature of this shift leads to the establishment of a transient subpopulation of S.Tm “doublets”—waist‐bearing bacteria anticipating cell division—which simultaneously express host cell invasion machinery. In epithelial cell culture infections, these S.Tm doublets outperform their “singlet” brethren and represent a hyperinvasive subpopulation. Atop both glass and enteroid‐derived monolayers, doublets swim along markedly straighter trajectories than singlets, thereby diversifying search patterns and improving the surface exploration capacity of the total bacterial population. The straighter swimming, combined with an enhanced cell‐adhesion propensity, suffices to account for the hyperinvasive doublet phenotype. This work highlights bacterial cell length heterogeneity as a key determinant of target search patterns atop epithelia.
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Affiliation(s)
- Viktor Ek
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Sweden
| | - Stefan A Fattinger
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Sweden.,Institute of Microbiology, Department of Biology, ETH, Zurich, Zurich, Switzerland
| | - Alexandra Florbrant
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Sweden
| | - Wolf-Dietrich Hardt
- Institute of Microbiology, Department of Biology, ETH, Zurich, Zurich, Switzerland
| | - Maria Letizia Di Martino
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Sweden
| | - Jens Eriksson
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Sweden
| | - Mikael E Sellin
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Sweden
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49
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Zhu Y, McHale G, Dawson J, Armstrong S, Wells G, Han R, Liu H, Vollmer W, Stoodley P, Jakubovics N, Chen J. Slippery Liquid-Like Solid Surfaces with Promising Antibiofilm Performance under Both Static and Flow Conditions. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6307-6319. [PMID: 35099179 PMCID: PMC9096797 DOI: 10.1021/acsami.1c14533] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Biofilms are central to some of the most urgent global challenges across diverse fields of application, from medicine to industries to the environment, and exert considerable economic and social impact. A fundamental assumption in anti-biofilms has been that the coating on a substrate surface is solid. The invention of slippery liquid-infused porous surfaces─a continuously wet lubricating coating retained on a solid surface by capillary forces─has led to this being challenged. However, in situations where flow occurs, shear stress may deplete the lubricant and affect the anti-biofilm performance. Here, we report on the use of slippery omniphobic covalently attached liquid (SOCAL) surfaces, which provide a surface coating with short (ca. 4 nm) non-cross-linked polydimethylsiloxane (PDMS) chains retaining liquid-surface properties, as an antibiofilm strategy stable under shear stress from flow. This surface reduced biofilm formation of the key biofilm-forming pathogens Staphylococcus epidermidis and Pseudomonas aeruginosa by three-four orders of magnitude compared to the widely used medical implant material PDMS after 7 days under static and dynamic culture conditions. Throughout the entire dynamic culture period of P. aeruginosa, SOCAL significantly outperformed a typical antibiofilm slippery surface [i.e., swollen PDMS in silicone oil (S-PDMS)]. We have revealed that significant oil loss occurred after 2-7 day flow for S-PDMS, which correlated to increased contact angle hysteresis (CAH), indicating a degradation of the slippery surface properties, and biofilm formation, while SOCAL has stable CAH and sustainable antibiofilm performance after 7 day flow. The significance of this correlation is to provide a useful easy-to-measure physical parameter as an indicator for long-term antibiofilm performance. This biofilm-resistant liquid-like solid surface offers a new antibiofilm strategy for applications in medical devices and other areas where biofilm development is problematic.
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Affiliation(s)
- Yufeng Zhu
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
| | - Glen McHale
- School
of Engineering, University of Edinburgh, Edinburgh EH9 3FB, U.K.
| | - Jack Dawson
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
| | - Steven Armstrong
- School
of Engineering, University of Edinburgh, Edinburgh EH9 3FB, U.K.
| | - Gary Wells
- School
of Engineering, University of Edinburgh, Edinburgh EH9 3FB, U.K.
| | - Rui Han
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
| | - Hongzhong Liu
- School
of Mechanical Engineering, Xi’an
Jiaotong University, Xi’an 710054, China
| | - Waldemar Vollmer
- Centre
for Bacterial Cell Biology, Biosciences Institute, Newcastle University, Newcastle
Upon Tyne NE2 4AX, U.K.
| | - Paul Stoodley
- Department
of Microbial Infection and Immunity and the Department of Orthopaedics, The Ohio State University, Columbus, Ohio 43210, United States
- National
Centre for Advanced Tribology at Southampton (nCATS), National Biofilm
Innovation Centre (NBIC), Mechanical Engineering, University of Southampton, Southampton S017 1BJ, U.K.
| | - Nicholas Jakubovics
- School
of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Newcastle
Upon Tyne NE2 4BW, U.K.
| | - Jinju Chen
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
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50
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Mukunthan Sulochana GN, Biswas P, Banuprasad TN, Chakraborty S. Fabricating Antipathogenic Interfaces via Nanoscale Topographies Inspired from Snake Skin. ACS APPLIED BIO MATERIALS 2022; 5:862-872. [DOI: 10.1021/acsabm.1c01243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Poulomi Biswas
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | | | - Suman Chakraborty
- Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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