1
|
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.
Collapse
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
| |
Collapse
|
2
|
Krajnc M, Fei C, Košmrlj A, Kalin M, Stopar D. Mechanical constraints to unbound expansion of B. subtilis on semi-solid surfaces. Microbiol Spectr 2024; 12:e0274023. [PMID: 38047692 PMCID: PMC10783106 DOI: 10.1128/spectrum.02740-23] [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: 07/06/2023] [Accepted: 10/13/2023] [Indexed: 12/05/2023] Open
Abstract
IMPORTANCE How bacterial cells colonize new territory is a problem of fundamental microbiological and biophysical interest and is key to the emergence of several phenomena of biological, ecological, and medical relevance. Here, we demonstrate how bacteria stuck in a colony of finite size can resume exploration of new territory by aquaplaning and how they fine tune biofilm viscoelasticity to surface material properties that allows them differential mobility. We show how changing local interfacial forces and colony viscosity results in a plethora of bacterial morphologies on surfaces with different physical and mechanical properties.
Collapse
Affiliation(s)
- Mojca Krajnc
- Biotechnical Faculty, Department of Microbiology, University of Ljubljana, Ljubljana, Slovenia
| | - Chenyi Fei
- Lewis-Sigler Institute for Integrative Genomics, Carl C. Icahn Laboratory, Princeton University, Princeton, New Jersey, USA
| | - Andrej Košmrlj
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey, USA
- Princeton Materials Institute, Princeton University, Princeton, New Jersey, USA
| | - Mitjan Kalin
- Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia
| | - David Stopar
- Biotechnical Faculty, Department of Microbiology, University of Ljubljana, Ljubljana, Slovenia
| |
Collapse
|
3
|
Truong VK, Hayles A, Bright R, Luu TQ, Dickey MD, Kalantar-Zadeh K, Vasilev K. Gallium Liquid Metal: Nanotoolbox for Antimicrobial Applications. ACS NANO 2023; 17:14406-14423. [PMID: 37506260 DOI: 10.1021/acsnano.3c06486] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
The proliferation of drug resistance in microbial pathogens poses a significant threat to human health. Hence, treatment measures are essential to surmount this growing problem. In this context, liquid metal nanoparticles are promising. Gallium, a post-transition metal notable for being a liquid at physiological temperature, has drawn attention for its distinctive properties, high antimicrobial efficacy, and low toxicity. Moreover, gallium nanoparticles demonstrate anti-inflammatory properties in immune cells. Gallium can alloy with other metals and be prepared in various composites to modify and tailor its characteristics and functionality. More importantly, the bactericidal mechanism of gallium liquid metal could sidestep the threat of emerging drug resistance mechanisms. Building on this rationale, gallium-based liquid metal nanoparticles can enable impactful and innovative strategic pathways in the battle against antimicrobial resistance. This review outlines the characteristics of gallium-based liquid metals at the nanoscale and their corresponding antimicrobial mechanisms to provide a comprehensive yet succinct overview of their current antimicrobial applications. In addition, challenges and opportunities that require further research efforts have been identified and discussed.
Collapse
Affiliation(s)
- Vi Khanh Truong
- Biomedical Nanoengineering Laboratory, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Andrew Hayles
- Biomedical Nanoengineering Laboratory, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Richard Bright
- Biomedical Nanoengineering Laboratory, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Trong Quan Luu
- Biomedical Nanoengineering Laboratory, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Michael D Dickey
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Kourosh Kalantar-Zadeh
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Krasimir Vasilev
- Biomedical Nanoengineering Laboratory, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia 5042, Australia
| |
Collapse
|
4
|
Sotniczuk A, Jastrzębska A, Chlanda A, Kwiatek A, Garbacz H. How Streptococcus mutans Affects the Surface Topography and Electrochemical Behavior of Nanostructured Bulk Ti. Biomolecules 2022; 12:biom12101515. [PMID: 36291724 PMCID: PMC9599476 DOI: 10.3390/biom12101515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/07/2022] [Accepted: 10/15/2022] [Indexed: 11/19/2022] Open
Abstract
The metabolization of carbohydrates by Streptococcus mutans leads to the formation of lactic acid in the oral cavity, which can consequently accelerate the degradation of dental implants fabricated from commercially available microcrystalline Ti. Microstructure influences surface topography and hence interaction between bacteria cells and Ti surfaces. This work offers the first description of the effect of S. mutans on the surface topography and properties of nanostructured bulk Ti, which is a promising candidate for modern narrow dental implants owing to its superior mechanical strength. It was found that S. mutans incubation resulted in the slight, unexpected decrease of surface nanoroughness, which was previously developed owing to privileged oxidation in areas of closely spaced boundaries. However, despite the changes in nanoscale surface topography, bacteria incubation did not reduce the high level of protection afforded by the oxide layer formed on the nanostructured Ti surface. The results highlight the need–hitherto ignored–to consider Ti microstructure when analyzing its behavior in the presence of carbohydrate-metabolizing bacteria.
Collapse
Affiliation(s)
- Agata Sotniczuk
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
- Correspondence:
| | - Agnieszka Jastrzębska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
| | - Adrian Chlanda
- Łukasiewicz Research Network—Institute of Microelectronics and Photonics, 01-919 Warsaw, Poland
| | - Agnieszka Kwiatek
- Institute of Microbiology, Faculty of Biology, University of Warsaw, 02-096 Warsaw, Poland
| | - Halina Garbacz
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
| |
Collapse
|
5
|
Hashemi PM, Borhani E, Nourbakhsh MS. Commercially pure titanium modification to enhance corrosion behavior and osteoblast response by ECAP for biomedical applications. J Appl Biomater Funct Mater 2022. [DOI: 10.1177/22808000221095234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
When it comes to using bio-metals, the chemical and biocompatibility properties of titanium led to its widespread use in biomedical implants. However, pure titanium possesses lower mechanical properties than Ti alloys containing cytotoxic elements. Severe plastic deformation (SPD) techniques were able to cause a significant strength increase, corrosion behavior improvement, and the release of the alloying elements. In this study, the ECAP process was performed on commercially pure titanium with a square cross-section at two and four passes, which resulted in a finer grain size and a more uniform microstructure. In order to improve cell behaviors, etch treatment was performed to produce nano-rough and nano-texture surfaces for all Ti samples. The effect of surface etching on corrosion, surface roughness, and cell behaviors on ECAP and untreated samples was also investigated. Optical/Field Emission Scanning Electron Microscopy, Atomic Force Microscopy, and X-Ray Diffraction were used to study the microstructural characterizations of samples. In addition, the impact of grain structure on the contact angle, electrochemical corrosion behavior, osteoblast response, and cell viability was investigated. The titanium that was ECAPed four times provided finer grains (200 nm) than the unprocessed sample (25 µm). The potentiodynamic polarization test revealed that corrosion resistance of ECAPed samples was enhanced, which was associated with grain refinement, affecting the passive film formation. Corrosion resistance and wettability experienced an apparent increase after each ECAP pass. In conclusion, improvement of grain size and surface roughness was due to the simultaneous effect of ECAP and etching treatment that led to the osteoblast response and cellular activity of samples.
Collapse
Affiliation(s)
- Peyman Mahmoudi Hashemi
- Biomaterial Group, Faculty of New Sciences and Technologies, Semnan University, Semnan, Iran
| | - Ehsan Borhani
- Nano-materials Group, Faculty of New Sciences and Technologies, Semnan University, Semnan, Iran
| | | |
Collapse
|
6
|
Sonnleitner D, Sommer C, Scheibel T, Lang G. Approaches to inhibit biofilm formation applying natural and artificial silk-based materials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 131:112458. [PMID: 34857315 DOI: 10.1016/j.msec.2021.112458] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 12/13/2022]
Abstract
The discovery of penicillin started a new era of health care since it allowed the effective treatment of formerly deadly infections. As a drawback, its overuse led to a growing number of multi-drug resistant pathogens. Challenging this arising threat, material research focuses on the development of microbe-killing or microbe repellent agents implementing such functions directly into materials. Due to their biocompatibility, non-immunogenicity and mechanical strength, silk-based materials are attractive candidates for applications in the biomedical field. Furthermore, it has been observed that silks display high persistency in their natural environment giving reason to suspect that they might be attractive candidates to prevent microbial infestation. The current review describes the process of biofilm formation on medical devices and the most common strategies to prevent it, divided into effects of surface topography, material modification and integrated additives. In this context, recent state of the art developments in the field of natural and artificial silk-based materials with microbe-repellant or antimicrobial properties are addressed. These silk properties are controversially discussed and conclusions are drawn as to which parameters will be decisive for the successful design of new bio-functional materials based on the blueprint of silk proteins.
Collapse
Affiliation(s)
- David Sonnleitner
- Biopolymer Processing, Faculty of Engineering Science, University of Bayreuth, Germany
| | - Christoph Sommer
- Chair of Biomaterials, Faculty of Engineering Science, University of Bayreuth, Germany
| | - Thomas Scheibel
- Chair of Biomaterials, Faculty of Engineering Science, University of Bayreuth, Germany
| | - Gregor Lang
- Biopolymer Processing, Faculty of Engineering Science, University of Bayreuth, Germany.
| |
Collapse
|
7
|
Biological Applications of Severely Plastically Deformed Nano-Grained Medical Devices: A Review. NANOMATERIALS 2021; 11:nano11030748. [PMID: 33809711 PMCID: PMC8002278 DOI: 10.3390/nano11030748] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 11/30/2022]
Abstract
Metallic materials are widely used for fabricating medical implants due to their high specific strength, biocompatibility, good corrosion properties, and fatigue resistance. Recently, titanium (Ti) and its alloys, as well as stainless steel (SS), have attracted attention from researchers because of their biocompatibility properties within the human body; however, improvements in mechanical properties while keeping other beneficial properties unchanged are still required. Severe plastic deformation (SPD) is a unique process for fabricating an ultra-fine-grained (UFG) metal with micrometer- to nanometer-level grain structures. SPD methods can substantially refine grain size and represent a promising strategy for improving biological functionality and mechanical properties. This present review paper provides an overview of different SPD techniques developed to create nano-/ultra-fine-grain-structured Ti and stainless steel for improved biomedical implant applications. Furthermore, studies will be covered that have used SPD techniques to improve bone cell proliferation and function while decreasing bacterial colonization when cultured on such nano-grained metals (without resorting to antibiotic use).
Collapse
|
8
|
Takechi M, Takamoto M, Ninomiya Y, Ono S, Mizuta K, Nakagawa T, Shigeishi H, Ohta K, Ishikawa K, Tsuru K. In vitro investigation of the cell compatibility and antibacterial properties of titanium treated with calcium and ozone. Dent Mater J 2021; 40:712-718. [PMID: 33518685 DOI: 10.4012/dmj.2020-224] [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: 11/23/2022]
Abstract
The purpose of this study was to evaluate the surface modification of calcium ions on roughened titanium as a surface treatment of dental implants for cell attachment, growth, and initial bacterial adhesion. When a surface-roughened, pure titanium disk was immersed in a calcium chloride solution (100 mM) containing 20 ppm ozone for 24 h at 25ºC, calcium was detected on the surface by X-ray photoelectron spectroscopy. The calcium-modified, roughened titanium disk had a significantly greater concentration of the initially adhered cells as well as cells cultured over 7 days compared with titanium disks without surface modification. Furthermore, the initial bacterial adhesion on the calcium-ozone treated titanium disk was statistically less than on a pure titanium disk or titanium disk treated without ozone. Dissolved ozone was useful for modifying the surface of roughened titanium with calcium ions and the surface modification may be applicable for dental implants.
Collapse
Affiliation(s)
- Masaaki Takechi
- Department of Oral and Maxillofacial Surgery, Program of Dentistry, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Megumi Takamoto
- Department of Dentistry and Oral Surgery, Shinshu University Hospital
| | - Yoshiaki Ninomiya
- Department of Oral and Maxillofacial Surgery, Program of Dentistry, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Shigehiro Ono
- Department of Oral and Maxillofacial Surgery, Program of Dentistry, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Kuniko Mizuta
- Department of Oral and Maxillofacial Surgery, Program of Dentistry, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Takayuki Nakagawa
- Department of Oral and Maxillofacial Surgery, Program of Dentistry, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Hideo Shigeishi
- Department of Public Oral Health, Program of Oral Health Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Kouji Ohta
- Department of Public Oral Health, Program of Oral Health Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Kunio Ishikawa
- Department of Biomaterials, Faculty of Dental Science, Kyushu University
| | - Kanji Tsuru
- Department of Biomaterials, Faculty of Dental Science, Kyushu University.,Section of Bioengineering, Department of Dental Engineering, Fukuoka Dental College
| |
Collapse
|
9
|
Le PH, Nguyen DHK, Aburto-Medina A, Linklater DP, Crawford RJ, MacLaughlin S, Ivanova EP. Nanoscale Surface Roughness Influences Candida albicans Biofilm Formation. ACS APPLIED BIO MATERIALS 2020; 3:8581-8591. [PMID: 35019629 DOI: 10.1021/acsabm.0c00985] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The microbial contamination of surfaces presents a significant challenge due to the adverse effects associated with biofilm formation, particularly on implantable devices. Here, the attachment and biofilm formation of the opportunistic human pathogen, Candida albicans ATCC 10231, were studied on surfaces with decreasing magnitudes of nanoscale roughness. The nanoscale surface roughness of nonpolished titanium, polished titanium, and glass was characterized according to average surface roughness, skewness, and kurtosis. Nonpolished titanium, polished titanium, and glass possessed average surface roughness (Sa) values of 350, 20, and 2.5 nm; skewness (Sskw) values of 1.0, 4.0, and 1.0; and (Skur) values of 3.5, 16, and 4, respectively. These unique characteristics of the surface nanoarchitecture were found to play a key role in limiting C. albicans attachment and modulating the functional phenotypic changes associated with biofilm formation. Our results suggest that surfaces with a specific combination of surface topographical parameters could prevent the attachment and biofilm formation of C. albicans. After 7 days, the density of attached C. albicans cells was recorded to be 230, 70, and 220 cells mm-2 on nonpolished titanium, polished titanium, and glass surfaces, respectively. Despite achieving a very low attachment density, C. albicanscells were only observed to produce hyphae associated with biofilm formation on nonpolished titanium surfaces, possessing the highest degree of surface roughness (Sa = 350 nm). This study provides a more comprehensive picture of the impact of surface architectures on C. albicans attachment, which is beneficial for the design of antifungal surfaces.
Collapse
Affiliation(s)
- Phuc H Le
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3000, Australia.,Australian Research Council Research Hub for Australian Steel Manufacturing, Wollongong, New South Wales 2500, Australia
| | - Duy H K Nguyen
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3000, Australia
| | - Arturo Aburto-Medina
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3000, Australia.,Australian Research Council Research Hub for Australian Steel Manufacturing, Wollongong, New South Wales 2500, Australia
| | - Denver P Linklater
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3000, Australia
| | - Russell J Crawford
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3000, Australia
| | | | - Elena P Ivanova
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3000, Australia
| |
Collapse
|
10
|
Pantaroto HN, de Almeida AB, Gomes OP, Matos AO, Landers R, Casarin RCV, da Silva JHD, Nociti FH, Barão VAR. Outlining cell interaction and inflammatory cytokines on UV-photofunctionalized mixed-phase TiO 2 thin film. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111438. [PMID: 33255031 DOI: 10.1016/j.msec.2020.111438] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/05/2020] [Accepted: 08/22/2020] [Indexed: 12/25/2022]
Abstract
Photofunctionalization mediated by ultraviolet (UV) light seems to be a promising approach to improve the physico-chemical characteristics and the biological response of titanium (Ti) dental implants. Seeing that photofunctionalization is able to remove carbon from the surface, besides to promote reactions on the titanium dioxide (TiO2) layer, coating the Ti with a stable TiO2 film could potentialize the UV effect. Thus, here we determined the impact of UV-photofunctionalized mixed-phase (anatase and rutile) TiO2 films on the physico-chemical properties of Ti substrate and cell biology. Mixed-phase TiO2 films were grown by radiofrequency magnetron sputtering on commercially pure titanium (cpTi) discs, and samples were divided as follow: cpTi (negative control), TiO2 (positive control), cpTi UV, TiO2 UV (experimental). Photofunctionalization was performed using UVA (360 nm - 40 W) and UVC (250 nm - 40 W) lamps for 48 h. Surfaces were analyzed in terms of morphology, topography, chemical composition, crystalline phase, wettability and surface free energy. Pre-osteoblastic cells (MC3T3E1) were used to assess cell morphology and adhesion, metabolism, mineralization potential and cytokine secretion (IFN-γ, TNF-α, IL-4, IL-6 and IL-17). TiO2-coated surfaces exhibited granular surface morphology and greater roughness. Photofunctionalization increased wettability (p < 0.05) and surface free energy (p < 0.001) on both surface conditions. TiO2-treated groups featured normal cell morphology and spreading, and greater cellular metabolic activity at 2 and 4 days (p < 0.05), whereas UV-photofunctionalized surfaces enhanced cell metabolism, cell adhered area, and calcium deposition (day 14) (p < 0.05). In general, assessed proteins were found slightly affected by either UV or TiO2 treatments. Altogether, our findings suggest that UV-photofunctionalized TiO2 surface has the potential to improve pre-osteoblastic cell differentiation and the ability of cells to form mineral nodules by modifying Ti physico-chemical properties towards a more stable context. UV-modified surfaces modulate the secretion of key inflammatory markers.
Collapse
Affiliation(s)
- Heloisa Navarro Pantaroto
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Amanda B de Almeida
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Orisson P Gomes
- São Paulo State University (UNESP), Department of Physics, Av. Eng. Luís Edmundo C. Coube, 14-01, Bauru, São Paulo 17033-360, Brazil
| | - Adaias O Matos
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Richard Landers
- University of Campinas (UNICAMP), Gleb Wataghin Physics Institute, Department of Applied Physics, R. Sérgio Buarque de Holanda, 777, Campinas, São Paulo 13083-859, Brazil
| | - Renato Corrêa V Casarin
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - José Humberto D da Silva
- São Paulo State University (UNESP), Department of Physics, Av. Eng. Luís Edmundo C. Coube, 14-01, Bauru, São Paulo 17033-360, Brazil
| | - Francisco H Nociti
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Valentim A R Barão
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil; Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil.
| |
Collapse
|
11
|
The multi-faceted mechano-bactericidal mechanism of nanostructured surfaces. Proc Natl Acad Sci U S A 2020; 117:12598-12605. [PMID: 32457154 DOI: 10.1073/pnas.1916680117] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The mechano-bactericidal activity of nanostructured surfaces has become the focus of intensive research toward the development of a new generation of antibacterial surfaces, particularly in the current era of emerging antibiotic resistance. This work demonstrates the effects of an incremental increase of nanopillar height on nanostructure-induced bacterial cell death. We propose that the mechanical lysis of bacterial cells can be influenced by the degree of elasticity and clustering of highly ordered silicon nanopillar arrays. Herein, silicon nanopillar arrays with diameter 35 nm, periodicity 90 nm and increasing heights of 220, 360, and 420 nm were fabricated using deep UV immersion lithography. Nanoarrays of 360-nm-height pillars exhibited the highest degree of bactericidal activity toward both Gram stain-negative Pseudomonas aeruginosa and Gram stain-positive Staphylococcus aureus bacteria, inducing 95 ± 5% and 83 ± 12% cell death, respectively. At heights of 360 nm, increased nanopillar elasticity contributes to the onset of pillar deformation in response to bacterial adhesion to the surface. Theoretical analyses of pillar elasticity confirm that deflection, deformation force, and mechanical energies are more significant for the substrata possessing more flexible pillars. Increased storage and release of mechanical energy may explain the enhanced bactericidal action of these nanopillar arrays toward bacterial cells contacting the surface; however, with further increase of nanopillar height (420 nm), the forces (and tensions) can be partially compensated by irreversible interpillar adhesion that reduces their bactericidal effect. These findings can be used to inform the design of next-generation mechano-responsive surfaces with tuneable bactericidal characteristics for antimicrobial surface technologies.
Collapse
|
12
|
pH-responsive and antibacterial properties of self-assembled multilayer films based on chitosan and tannic acid. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110493. [DOI: 10.1016/j.msec.2019.110493] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 11/05/2019] [Accepted: 11/25/2019] [Indexed: 01/29/2023]
|
13
|
Spengler C, Nolle F, Mischo J, Faidt T, Grandthyll S, Thewes N, Koch M, Müller F, Bischoff M, Klatt MA, Jacobs K. Strength of bacterial adhesion on nanostructured surfaces quantified by substrate morphometry. NANOSCALE 2019; 11:19713-19722. [PMID: 31599281 DOI: 10.1039/c9nr04375f] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Microbial adhesion and the subsequent formation of resilient biofilms at surfaces are decisively influenced by substrate properties, such as the topography. To date, studies that quantitatively link surface topography and bacterial adhesion are scarce, as both are not straightforward to quantify. To fill this gap, surface morphometry combined with single-cell force spectroscopy was performed on surfaces with irregular topographies on the nano-scale. As surfaces, hydrophobized silicon wafers were used that were etched to exhibit surface structures in the same size range as the bacterial cell wall molecules. The surface structures were characterized by a detailed morphometric analysis based on Minkowski functionals revealing both qualitatively similar features and quantitatively different extensions. We find that as the size of the nanostructures increases, the adhesion forces decrease in a way that can be quantified by the area of the surface that is available for the tethering of cell wall molecules. In addition, we observe a bactericidal effect, which is more pronounced on substrates with taller structures but does not influence adhesion. Our results can be used for a targeted development of 3D-structured materials for/against bio-adhesion. Moreover, the morphometric analysis can serve as a future gold standard for characterizing a broad spectrum of material structures.
Collapse
Affiliation(s)
- Christian Spengler
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Friederike Nolle
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Johannes Mischo
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Thomas Faidt
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Samuel Grandthyll
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Nicolas Thewes
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Marcus Koch
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Frank Müller
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg/Saar, Germany
| | - Michael Andreas Klatt
- Institute of Stochastics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Karin Jacobs
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| |
Collapse
|
14
|
Houshyar S, Kumar GS, Rifai A, Tran N, Nayak R, Shanks RA, Padhye R, Fox K, Bhattacharyya A. Nanodiamond/poly-ε-caprolactone nanofibrous scaffold for wound management. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 100:378-387. [DOI: 10.1016/j.msec.2019.02.110] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 02/04/2019] [Accepted: 02/28/2019] [Indexed: 10/27/2022]
|
15
|
Elbourne A, Chapman J, Gelmi A, Cozzolino D, Crawford RJ, Truong VK. Bacterial-nanostructure interactions: The role of cell elasticity and adhesion forces. J Colloid Interface Sci 2019; 546:192-210. [PMID: 30921674 DOI: 10.1016/j.jcis.2019.03.050] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/13/2019] [Accepted: 03/14/2019] [Indexed: 02/07/2023]
Abstract
The attachment of single-celled organisms, namely bacteria and fungi, to abiotic surfaces is of great interest to both the scientific and medical communities. This is because the interaction of such cells has important implications in a range of areas, including biofilm formation, biofouling, antimicrobial surface technologies, and bio-nanotechnologies, as well as infection development, control, and mitigation. While central to many biological phenomena, the factors which govern microbial surface attachment are still not fully understood. This lack of understanding is a direct consequence of the complex nature of cell-surface interactions, which can involve both specific and non-specific interactions. For applications involving micro- and nano-structured surfaces, developing an understanding of such phenomenon is further complicated by the diverse nature of surface architectures, surface chemistry, variation in cellular physiology, and the intended technological output. These factors are extremely important to understand in the emerging field of antibacterial nanostructured surfaces. The aim of this perspective is to re-frame the discussion surrounding the mechanism of nanostructured-microbial surface interactions. Broadly, the article reviews our current understanding of these phenomena, while highlighting the knowledge gaps surrounding the adhesive forces which govern bacterial-nanostructure interactions and the role of cell membrane rigidity in modulating surface activity. The roles of surface charge, cell rigidity, and cell-surface adhesion force in bacterial-surface adsorption are discussed in detail. Presently, most studies have overlooked these areas, which has left many questions unanswered. Further, this perspective article highlights the numerous experimental issues and misinterpretations which surround current studies of antibacterial nanostructured surfaces.
Collapse
Affiliation(s)
- Aaron Elbourne
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia; Nanobiotechnology Laboratory, RMIT University, Melbourne, VIC 3001, Australia.
| | - James Chapman
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia; Nanobiotechnology Laboratory, RMIT University, Melbourne, VIC 3001, Australia
| | - Amy Gelmi
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia
| | - Daniel Cozzolino
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia
| | - Russell J Crawford
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia; Nanobiotechnology Laboratory, RMIT University, Melbourne, VIC 3001, Australia
| | - Vi Khanh Truong
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC 3001, Australia; Nanobiotechnology Laboratory, RMIT University, Melbourne, VIC 3001, Australia
| |
Collapse
|
16
|
Elsayed SM, Paschke S, Rau SJ, Lienkamp K. Surface Structuring Combined with Chemical Surface Functionalization: An Effective Tool to Manipulate Cell Adhesion. Molecules 2019; 24:E909. [PMID: 30841576 PMCID: PMC6429452 DOI: 10.3390/molecules24050909] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 02/28/2019] [Accepted: 03/01/2019] [Indexed: 12/26/2022] Open
Abstract
In this study, we investigate how a surface structure underneath a surface-attached polymer coating affects the bioactivity of the resulting material. To that end, structured surfaces were fabricated using colloidal lithography (lateral dimensions: 200 nm to 1 µm, height ~15 to 50 nm). The surface structures were further functionalized either with antimicrobial, cell-adhesive polycations or with protein-repellent polyzwitterions. The materials thus obtained were compared to non-functionalized structured surfaces and unstructured polymer monolayers. Their physical properties were studied by contact-angle measurements and atomic force microscopy (AFM). Protein adhesion was studied by surface plasmon resonance spectroscopy, and the antimicrobial activity against Escherichia coli bacteria was tested. The growth of human mucosal gingiva keratinocytes on the materials was analyzed using the Alamar blue assay, optical microscopy, and live-dead staining. The data shows that the underlying surface structure itself reduced protein adhesion and also bacterial adhesion, as evidenced by increased antimicrobial activity. It also enhanced cell adhesion to the surfaces. Particularly in combination with the adhesive polycations, the surfaces increased the cell growth compared to the unstructured reference materials. Thus, functionalizing structured surfaces with adhesive polymer could be a valuable tool for improved tissue integration.
Collapse
Affiliation(s)
- Sarah M Elsayed
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany.
| | - Stefan Paschke
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany.
| | - Sibylle J Rau
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany.
| | - Karen Lienkamp
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany.
| |
Collapse
|
17
|
Elbourne A, Truong VK, Cheeseman S, Rajapaksha P, Gangadoo S, Chapman J, Crawford RJ. The use of nanomaterials for the mitigation of pathogenic biofilm formation. METHODS IN MICROBIOLOGY 2019. [DOI: 10.1016/bs.mim.2019.04.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
18
|
Newe A, Becker L. Three-Dimensional Portable Document Format (3D PDF) in Clinical Communication and Biomedical Sciences: Systematic Review of Applications, Tools, and Protocols. JMIR Med Inform 2018; 6:e10295. [PMID: 30087092 PMCID: PMC6103636 DOI: 10.2196/10295] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 05/07/2018] [Accepted: 05/24/2018] [Indexed: 12/20/2022] Open
Abstract
Background The Portable Document Format (PDF) is the standard file format for the communication of biomedical information via the internet and for electronic scholarly publishing. Although PDF allows for the embedding of three-dimensional (3D) objects and although this technology has great potential for the communication of such data, it is not broadly used by the scientific community or by clinicians. Objective The objective of this review was to provide an overview of existing publications that apply 3D PDF technology and the protocols and tools for the creation of model files and 3D PDFs for scholarly purposes to demonstrate the possibilities and the ways to use this technology. Methods A systematic literature review was performed using PubMed and Google Scholar. Articles searched for were in English, peer-reviewed with biomedical reference, published since 2005 in a journal or presented at a conference or scientific meeting. Ineligible articles were removed after screening. The found literature was categorized into articles that (1) applied 3D PDF for visualization, (2) showed ways to use 3D PDF, and (3) provided tools or protocols for the creation of 3D PDFs or necessary models. Finally, the latter category was analyzed in detail to provide an overview of the state of the art. Results The search retrieved a total of 902 items. Screening identified 200 in-scope publications, 13 covering the use of 3D PDF for medical purposes. Only one article described a clinical routine use case; all others were pure research articles. The disciplines that were covered beside medicine were many. In most cases, either animal or human anatomies were visualized. A method, protocol, software, library, or other tool for the creation of 3D PDFs or model files was described in 19 articles. Most of these tools required advanced programming skills and/or the installation of further software packages. Only one software application presented an all-in-one solution with a graphical user interface. Conclusions The use of 3D PDF for visualization purposes in clinical communication and in biomedical publications is still not in common use, although both the necessary technique and suitable tools are available, and there are many arguments in favor of this technique. The potential of 3D PDF usage should be disseminated in the clinical and biomedical community. Furthermore, easy-to-use, standalone, and free-of-charge software tools for the creation of 3D PDFs should be developed.
Collapse
Affiliation(s)
- Axel Newe
- Chair of Medical Informatics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany.,NewTec GmbH, Pfaffenhofen an der Roth, Germany
| | - Linda Becker
- Chair of Health Psychology, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| |
Collapse
|
19
|
Champigneux P, Delia ML, Bergel A. Impact of electrode micro- and nano-scale topography on the formation and performance of microbial electrodes. Biosens Bioelectron 2018; 118:231-246. [PMID: 30098490 DOI: 10.1016/j.bios.2018.06.059] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 06/25/2018] [Accepted: 06/27/2018] [Indexed: 02/05/2023]
Abstract
From a fundamental standpoint, microbial electrochemistry is unravelling a thrilling link between life and materials. Technically, it may be the source of a large number of new processes such as microbial fuel cells for powering remote sensors, autonomous sensors, microbial electrolysers and equipment for effluent treatment. Microbial electron transfers are also involved in many natural processes such as biocorrosion. In these contexts, a huge number of studies have dealt with the impact of electrode materials, coatings and surface functionalizations but very few have focused on the effect of the surface topography, although it has often been pointed out as a key parameter impacting the performance of electroactive biofilms. The first part of the review gives an overview of the influence of electrode topography on abiotic electrochemical reactions. The second part recalls some basics of the effect of surface topography on bacterial adhesion and biofilm formation, in a broad domain reaching beyond the context of electroactivity. On these well-established bases, the effect of surface topography is reviewed and analysed in the field of electroactive biofilms. General trends are extracted and fundamental questions are pointed out, which should be addressed to boost future research endeavours. The objective is to provide basic guidelines useful to the widest possible range of research communities so that they can exploit surface topography as a powerful lever to improve, or to mitigate in the case of biocorrosion for instance, the performance of electrode/biofilm interfaces.
Collapse
Affiliation(s)
- Pierre Champigneux
- Laboratoire de Génie Chimique, CNRS, Université de Toulouse (INPT), 4 allée Emile Monso, 31432 Toulouse, France
| | - Marie-Line Delia
- Laboratoire de Génie Chimique, CNRS, Université de Toulouse (INPT), 4 allée Emile Monso, 31432 Toulouse, France
| | - Alain Bergel
- Laboratoire de Génie Chimique, CNRS, Université de Toulouse (INPT), 4 allée Emile Monso, 31432 Toulouse, France.
| |
Collapse
|
20
|
Andrés NC, Sieben JM, Baldini M, Rodríguez CH, Famiglietti Á, Messina PV. Electroactive Mg 2+-Hydroxyapatite Nanostructured Networks against Drug-Resistant Bone Infection Strains. ACS APPLIED MATERIALS & INTERFACES 2018; 10:19534-19544. [PMID: 29799727 DOI: 10.1021/acsami.8b06055] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surface colonization competition between bacteria and host cells is one of the critical factors involved in tissue/implant integration. Current biomaterials are evaluated for their ability both of withstanding favorable responses of host tissue cells and of resisting bacterial contamination. In this work, the antibacterial ability of biocompatible Mg2+-substituted nanostructured hydroxyapatite (HA) was investigated. The densities of Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli strains were significantly decreased after culture in the presence of Mg-substituted HA materials in direct correlation with Mg2+-Ca2+ switch in the HA lattice. It was noticed that this decrease was accompanied by a minimal alteration of bacterial environments; therefore, the Mg2+-HA antibacterial effect was associated with the material surface topography and it electroactive behavior. It was observed that 2.23 wt % Mg2+-HA samples exhibited the best antibacterial performance; it decreased 2-fold the initial population of E. coli, P. aeruginosa, and S. aureus at the intermediate concentration (50 mg mL-1 of broth). Our results reinforce the potential of Mg-HA nanostructured materials to be used in antibacterial coatings for implantable devices and/or medicinal materials to prevent bone infection and to promote wound healing.
Collapse
Affiliation(s)
| | | | - Mónica Baldini
- Department of Biology, Biochemistry and Pharmacy , Universidad Nacional del Sur , B8000ICN Bahía Blanca , Argentina
| | - Carlos H Rodríguez
- Laboratory of Bacteriology, Department of Clinical Biochemistry, Hospital de Clínicas "José de San Martín", Faculty of Pharmacy and Biochemistry , Universidad de Buenos Aires , C1113AAD CABA, Buenos Aires , Argentina
| | - Ángela Famiglietti
- Laboratory of Bacteriology, Department of Clinical Biochemistry, Hospital de Clínicas "José de San Martín", Faculty of Pharmacy and Biochemistry , Universidad de Buenos Aires , C1113AAD CABA, Buenos Aires , Argentina
| | | |
Collapse
|
21
|
Elbourne A, Crawford RJ, Ivanova EP. Nano-structured antimicrobial surfaces: From nature to synthetic analogues. J Colloid Interface Sci 2017; 508:603-616. [DOI: 10.1016/j.jcis.2017.07.021] [Citation(s) in RCA: 170] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 01/10/2023]
|
22
|
Vöhringer M, Hartleb W, Lienkamp K. Surface Structuring Meets Orthogonal Chemical Modifications: Toward a Technology Platform for Site-Selectively Functionalized Polymer Surfaces and BioMEMS. ACS Biomater Sci Eng 2017; 3:909-921. [PMID: 33429563 DOI: 10.1021/acsbiomaterials.7b00140] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A manufacturing process for the site-selective modification of structured (bio)material surfaces with two different polymers/biomolecules is presented. In the first step, a chemical surface contrast is created (e.g., a gold-on-silicon contrast obtained by colloidal lithography), and is combined with two orthogonal surface reactions for polymer/biomolecule immobilization. To demonstrate this, an antimicrobial SMAMP polymer and a protein-repellent polyzwitterion were site-selectively surface-immobilized on the gold-silicon structures. By varying the structure spacing and the surface architecture, structure-property relationships for the interaction of these bifunctional polymer surfaces with bacteria and proteins were obtained (studied by fluorescence microscopy, atomic force microscopy, surface plasmon resonance spectroscopy, and antimicrobial assays). At 1 μm spacing, a fully antimicrobially active bifunctional material was obtained, which also near-quantitatively reduced protein adhesion. As the process is generally applicable to polymers/biomolecules with aliphatic CH-groups, it is an interesting platform technology for site-selectively functionalized bifunctional (Bio)MEMS.
Collapse
Affiliation(s)
- Maria Vöhringer
- Department of Microsystems Engineering (IMTEK) and Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), Albert-Ludwigs-Universität, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
| | - Wibke Hartleb
- Department of Microsystems Engineering (IMTEK) and Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), Albert-Ludwigs-Universität, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
| | - Karen Lienkamp
- Department of Microsystems Engineering (IMTEK) and Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), Albert-Ludwigs-Universität, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
| |
Collapse
|
23
|
James SA, Hilal N, Wright CJ. Atomic force microscopy studies of bioprocess engineering surfaces - imaging, interactions and mechanical properties mediating bacterial adhesion. Biotechnol J 2017; 12. [PMID: 28488793 DOI: 10.1002/biot.201600698] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 03/24/2017] [Accepted: 04/10/2017] [Indexed: 12/19/2022]
Abstract
The detrimental effect of bacterial biofilms on process engineering surfaces is well documented. Thus, interest in the early stages of bacterial biofilm formation; in particular bacterial adhesion and the production of anti-fouling coatings has grown exponentially as a field. During this time, Atomic force microscopy (AFM) has emerged as a critical tool for the evaluation of bacterial adhesion. Due to its versatility AFM offers not only insight into the topographical landscape and mechanical properties of the engineering surfaces, but elucidates, through direct quantification the topographical and biomechnical properties of the foulants The aim of this review is to collate the current research on bacterial adhesion, both theoretical and practical, and outline how AFM as a technique is uniquely equipped to provide further insight into the nanoscale world at the bioprocess engineering surface.
Collapse
Affiliation(s)
- Sean A James
- Biomaterials, Biofouling and Biofilms Engineering Laboratory (B3EL, System and Process Engineering Center, College of Engineering, Swansea University, Fabian Way, Swansea, SA1 8EN, UK
| | - Nidal Hilal
- Centre for Water Advanced Technologies and Environmental Research (CWATER), College of Engineering, Swansea University, Fabian Way, Swansea, SA1 8EN, UK
| | - Chris J Wright
- Biomaterials, Biofouling and Biofilms Engineering Laboratory (B3EL, System and Process Engineering Center, College of Engineering, Swansea University, Fabian Way, Swansea, SA1 8EN, UK
| |
Collapse
|
24
|
Bock RM, Jones EN, Ray DA, Sonny Bal B, Pezzotti G, McEntire BJ. Bacteriostatic behavior of surface modulated silicon nitride in comparison to polyetheretherketone and titanium. J Biomed Mater Res A 2017; 105:1521-1534. [PMID: 28000413 DOI: 10.1002/jbm.a.35987] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/23/2016] [Accepted: 12/15/2016] [Indexed: 01/23/2023]
Abstract
Perioperative and latent infections are leading causes of revision surgery for orthopaedic devices resulting in significant increased patient care, comorbidities, and attendant costs. Identifying biomaterial surfaces that inherently resist biofilm adhesion and bacterial expression is an important emerging strategy in addressing implant-related infections. This in vitro study was designed to compare biofilm formation on three biomaterials commonly employed in spinal fusion surgery-silicon nitride (Si3 N4 ), polyetheretherketone (PEEK), and a titanium alloy (Ti6Al4V-ELI) -using one gram-positive and one gram-negative bacterial species. Disc samples from various surface treated Si3 N4 , PEEK, and Ti6Al4V were inoculated with 105 CFU/mm2 Staphylococcus epidermidis (ATCC®14990™) or Escherichia coli (ATCC® 25922™) and cultured in PBS, 7% glucose, and 10% human plasma for 24 and 48 h, followed by retrieval and rinsing. Vortexed solutions were diluted, plated, and incubated at 37 °C for 24 to 48 h. Colony forming units (CFU/mm2 ) were determined using applicable dilution factors and surface areas. A two-tailed, heteroscedastic Student's t-test (95% confidence) was used to determine statistical significance. The various Si3 N4 samples showed the most favorable bacterial resistance for both bacilli tested. The mechanisms for the bacteriostatic behavior of Si3 N4 are likely due to multivariate surface effects including submicron-topography, negative charging, and chemical interactions which form peroxynitrite (an oxidative agent). Si3 N4 is a new biomaterial with the apparent potential to inhibit biofilm formation. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 1521-1534, 2017.
Collapse
Affiliation(s)
- Ryan M Bock
- Amedica Corporation, 1885 W. 2100 S, Salt Lake City, Utah, 84119
| | - Erin N Jones
- Amedica Corporation, 1885 W. 2100 S, Salt Lake City, Utah, 84119
| | - Darin A Ray
- Amedica Corporation, 1885 W. 2100 S, Salt Lake City, Utah, 84119
| | - B Sonny Bal
- Amedica Corporation, 1885 W. 2100 S, Salt Lake City, Utah, 84119.,Department of Orthopaedic Surgery, College of Medicine, University of Missouri, Columbia, Missouri, 65212
| | - Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Kyoto, Matsugasaki, 606-8585, Japan
| | - Bryan J McEntire
- Amedica Corporation, 1885 W. 2100 S, Salt Lake City, Utah, 84119
| |
Collapse
|
25
|
Chamsaz EA, Mankoci S, Barton HA, Joy A. Nontoxic Cationic Coumarin Polyester Coatings Prevent Pseudomonas aeruginosa Biofilm Formation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:6704-6711. [PMID: 28150937 DOI: 10.1021/acsami.6b12610] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The rapid increase in bacterial infections and antimicrobial resistance is a growing public health concern. Infections arising from bacterial contamination of surgical tools, medical implants, catheters, and hospital surfaces can potentially be addressed by antimicrobial polymeric coatings. The challenge in developing such polymers for in vivo use is the ability to achieve high antimicrobial efficacy while at the same time being nontoxic to human cells. Although several classes of antimicrobial polymers have been developed, many of them cannot be used in the clinical setting due to their nonselective toxicity toward bacteria and mammalian cells. Here, we demonstrate that coumarin polyesters with cationic pendant groups are very effective against Gram negative Pseudomonas aeruginosa. Coumarin polyesters with pendant cationic amine groups were coated onto glass coverslips and tested for their antimicrobial activity against P. aeruginosa colonization of the surface. The results demonstrate that the cationic coumarin polyester kills the surface attached bacterial cells preventing biofilm formation but does not show any hemolytic activity or discernible toxicity toward mammalian cells. The antimicrobial polyesters described in this work have several advantages desired in antimicrobial coatings such as high antimicrobial activity, low toxicity toward mammalian cells, visualization and ease of synthesis and fabrication, all of which are necessary for translation to the clinic.
Collapse
Affiliation(s)
- Elaheh A Chamsaz
- Department of Polymer Science and ‡Department of Biology, The University of Akron , Akron, Ohio 44325, United States
| | - Steven Mankoci
- Department of Polymer Science and ‡Department of Biology, The University of Akron , Akron, Ohio 44325, United States
| | - Hazel A Barton
- Department of Polymer Science and ‡Department of Biology, The University of Akron , Akron, Ohio 44325, United States
| | - Abraham Joy
- Department of Polymer Science and ‡Department of Biology, The University of Akron , Akron, Ohio 44325, United States
| |
Collapse
|
26
|
Lüdecke C, Roth M, Yu W, Horn U, Bossert J, Jandt KD. Nanorough titanium surfaces reduce adhesion of Escherichia coli and Staphylococcus aureus via nano adhesion points. Colloids Surf B Biointerfaces 2016; 145:617-625. [DOI: 10.1016/j.colsurfb.2016.05.049] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/26/2016] [Accepted: 05/17/2016] [Indexed: 01/06/2023]
|
27
|
Estevam-Alves R, Ferreira PHD, Coatrini AC, Oliveira ON, Fontana CR, Mendonca CR. Femtosecond Laser Patterning of the Biopolymer Chitosan for Biofilm Formation. Int J Mol Sci 2016; 17:ijms17081243. [PMID: 27548153 PMCID: PMC5000641 DOI: 10.3390/ijms17081243] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/13/2016] [Accepted: 07/26/2016] [Indexed: 01/01/2023] Open
Abstract
Controlling microbial growth is crucial for many biomedical, pharmaceutical and food industry applications. In this paper, we used a femtosecond laser to microstructure the surface of chitosan, a biocompatible polymer that has been explored for applications ranging from antimicrobial action to drug delivery. The influence of energy density on the features produced on chitosan was investigated by optical and atomic force microscopies. An increase in the hydrophilic character of the chitosan surface was attained upon laser micromachining. Patterned chitosan films were used to observe Staphylococcus aureus (ATCC 25923) biofilm formation, revealing an increase in the biofilm formation in the structured regions. Our results indicate that fs-laser micromachining is an attractive option to pattern biocompatible surfaces, and to investigate basic aspects of the relationship between surface topography and bacterial adhesion.
Collapse
Affiliation(s)
- Regina Estevam-Alves
- São Carlos Institute of Physics, University of São Paulo (USP), São Carlos 13566-590, SP, Brazil.
- Department of Materials Engineering, School of Engineering of São Carlos (USP), São Carlos 13563-120, SP, Brazil.
| | | | - Andrey C Coatrini
- São Carlos Institute of Physics, University of São Paulo (USP), São Carlos 13566-590, SP, Brazil.
- Department of Materials Engineering, School of Engineering of São Carlos (USP), São Carlos 13563-120, SP, Brazil.
| | - Osvaldo N Oliveira
- São Carlos Institute of Physics, University of São Paulo (USP), São Carlos 13566-590, SP, Brazil.
| | - Carla Raquel Fontana
- Faculdade de Ciencias Farmaceuticas, UNESP-Univ. Estadual Paulista, Campus Araraquara, Departamento de Analises Clinicas, Araraquara 14800-903, SP, Brazil.
| | - Cleber Renato Mendonca
- São Carlos Institute of Physics, University of São Paulo (USP), São Carlos 13566-590, SP, Brazil.
| |
Collapse
|
28
|
Tian Y, Cao H, Qiao Y, Liu X. Antimicrobial and osteogenic properties of iron-doped titanium. RSC Adv 2016. [DOI: 10.1039/c6ra08359e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Iron doped modification layer formed on titanium achieved antibacterial effect as well as bioactivity by regulating the production of ROS.
Collapse
Affiliation(s)
- Yaxin Tian
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- People's Republic of China
| | - Huiliang Cao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- People's Republic of China
| | - Yuqin Qiao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- People's Republic of China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- People's Republic of China
| |
Collapse
|
29
|
de Medeiros Aires M, Treter J, Nunes Filho A, Oliveira Nascimento I, José Macedo A, Alves Júnior C. Minimizing Pseudomonas aeruginosa adhesion to titanium surfaces by a plasma nitriding process. AIMS BIOPHYSICS 2016. [DOI: 10.3934/biophy.2017.1.19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
|
30
|
Antibacterial titanium nano-patterned arrays inspired by dragonfly wings. Sci Rep 2015; 5:16817. [PMID: 26576662 PMCID: PMC4649496 DOI: 10.1038/srep16817] [Citation(s) in RCA: 162] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 10/16/2015] [Indexed: 12/28/2022] Open
Abstract
Titanium and its alloys remain the most popular choice as a medical implant material because of its desirable properties. The successful osseointegration of titanium implants is, however, adversely affected by the presence of bacterial biofilms that can form on the surface, and hence methods for preventing the formation of surface biofilms have been the subject of intensive research over the past few years. In this study, we report the response of bacteria and primary human fibroblasts to the antibacterial nanoarrays fabricated on titanium surfaces using a simple hydrothermal etching process. These fabricated titanium surfaces were shown to possess selective bactericidal activity, eliminating almost 50% of Pseudomonas aeruginosa cells and about 20% of the Staphylococcus aureus cells coming into contact with the surface. These nano-patterned surfaces were also shown to enhance the aligned attachment behavior and proliferation of primary human fibroblasts over 10 days of growth. These antibacterial surfaces, which are capable of exhibiting differential responses to bacterial and eukaryotic cells, represent surfaces that have excellent prospects for biomedical applications.
Collapse
|
31
|
Pham VTH, Truong VK, Quinn MDJ, Notley SM, Guo Y, Baulin VA, Al Kobaisi M, Crawford RJ, Ivanova EP. Graphene Induces Formation of Pores That Kill Spherical and Rod-Shaped Bacteria. ACS NANO 2015; 9:8458-67. [PMID: 26166486 DOI: 10.1021/acsnano.5b03368] [Citation(s) in RCA: 227] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Pristine graphene, its derivatives, and composites have been widely reported to possess antibacterial properties. Most of the studies simulating the interaction between bacterial cell membranes and the surface of graphene have proposed that the graphene-induced bacterial cell death is caused either by (1) the insertion of blade-like graphene-based nanosheets or (2) the destructive extraction of lipid molecules by the presence of the lipophilic graphene. These simulation studies have, however, only take into account graphene-cell membrane interactions where the graphene is in a dispersed form. In this paper, we report the antimicrobial behavior of graphene sheet surfaces in an attempt to further advance the current knowledge pertaining to graphene cytotoxicity using both experimental and computer simulation approaches. Graphene nanofilms were fabricated to exhibit different edge lengths and different angles of orientation in the graphene sheets. These substrates were placed in contact with Pseudomonas aeruginosa and Staphylococcus aureus bacteria, where it was seen that these substrates exhibited variable bactericidal efficiency toward these two pathogenic bacteria. It was demonstrated that the density of the edges of the graphene was one of the principal parameters that contributed to the antibacterial behavior of the graphene nanosheet films. The study provides both experimental and theoretical evidence that the antibacterial behavior of graphene nanosheets arises from the formation of pores in the bacterial cell wall, causing a subsequent osmotic imbalance and cell death.
Collapse
Affiliation(s)
- Vy T H Pham
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology , Hawthorn, Melbourne 3122, VIC, Australia
| | - Vi Khanh Truong
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology , Hawthorn, Melbourne 3122, VIC, Australia
| | - Matthew D J Quinn
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology , Hawthorn, Melbourne 3122, VIC, Australia
| | - Shannon M Notley
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology , Hawthorn, Melbourne 3122, VIC, Australia
| | - Yachong Guo
- Department d'Enginyeria Quimica, Universitat Rovira i Virgili , 26 Av. dels Paisos Catalans, 43007 Tarragona, Spain
| | - Vladimir A Baulin
- Department d'Enginyeria Quimica, Universitat Rovira i Virgili , 26 Av. dels Paisos Catalans, 43007 Tarragona, Spain
| | - Mohammad Al Kobaisi
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology , Hawthorn, Melbourne 3122, VIC, Australia
| | - Russell J Crawford
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology , Hawthorn, Melbourne 3122, VIC, Australia
| | - Elena P Ivanova
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology , Hawthorn, Melbourne 3122, VIC, Australia
| |
Collapse
|
32
|
Anitha VC, Lee JH, Lee J, Banerjee AN, Joo SW, Min BK. Biofilm formation on a TiO₂ nanotube with controlled pore diameter and surface wettability. NANOTECHNOLOGY 2015; 26:065102. [PMID: 25604920 DOI: 10.1088/0957-4484/26/6/065102] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Titania (TiO2) nanotube arrays (TNAs) with different pore diameters (140 - 20 nm) are fabricated via anodization using hydrofluoric acid (HF) containing ethylene glycol (EG) by changing the HF-to-EG volume ratio and the anodization voltage. To evaluate the effects of different pore diameters of TiO2 nanotubes on bacterial biofilm formation, Shewanella oneidensis (S. oneidensis) MR-1 cells and a crystal-violet biofilm assay are used. The surface roughness and wettability of the TNA surfaces as a function of pore diameter, measured via the contact angle and AFM techniques, are correlated with the controlled biofilm formation. Biofilm formation increases with the decreasing nanotube pore diameter, and a 20 nm TiO2 nanotube shows the maximum biofilm formation. The measurements revealed that 20 nm surfaces have the least hydrophilicity with the highest surface roughness of ∼17 nm and that they show almost a 90% increase in the effective surface area relative to the 140 nm TNAs, which stimulate the cells more effectively to produce the pili to attach to the surface for more biofilm formation. The results demonstrate that bacterial cell adhesion (and hence, biofilm formation) can effectively be controlled by tuning the roughness and wettability of TNAs via controlling the pore diameters of TNA surfaces. This biofilm formation as a function of the surface properties of TNAs can be a potential candidate for both medical applications and as electrodes in microbial fuel cells.
Collapse
Affiliation(s)
- V C Anitha
- School of Mechanical Engineering and Yeungnam University, Gyeongsan 712-749, Korea
| | | | | | | | | | | |
Collapse
|
33
|
Godoy-Gallardo M, Mas-Moruno C, Yu K, Manero JM, Gil FJ, Kizhakkedathu JN, Rodriguez D. Antibacterial Properties of hLf1–11 Peptide onto Titanium Surfaces: A Comparison Study Between Silanization and Surface Initiated Polymerization. Biomacromolecules 2015; 16:483-96. [DOI: 10.1021/bm501528x] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Maria Godoy-Gallardo
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Carlos Mas-Moruno
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Kai Yu
- Centre
for Blood Research and Department of Pathology and Laboratory Medicine, University of British Columbia, Life Sciences Centre, 2350 Health Sciences Mall, Vancouver, British Columbia Canada, V6T 1Z3
| | - José M. Manero
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Francisco J. Gil
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| | - Jayachandran N. Kizhakkedathu
- Centre
for Blood Research and Department of Pathology and Laboratory Medicine, University of British Columbia, Life Sciences Centre, 2350 Health Sciences Mall, Vancouver, British Columbia Canada, V6T 1Z3
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia Canada, V6T 1Z1
| | - Daniel Rodriguez
- Biomaterials,
Biomechanics and Tissue Engineering Group, Department of Materials
Science and Metallurgy, Technical University of Catalonia (UPC), ETSEIB, Avenida Diagonal 647, 08028-Barcelona, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus Río Ebro,
Edificio I+D Bloque 5, 1a planta, c/Poeta Mariano Esquillor
s/n, 50018-Zaragoza, Spain
- Centre for Research in NanoEngineering (CRNE) - UPC, C/Pascual i Vila 15, 08028-Barcelona, Spain
| |
Collapse
|
34
|
Polyakov AV, Semenova IP, Valiev RZ. High fatigue strength and enhanced biocompatibility of UFG CP Ti for medical innovative applications. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1757-899x/63/1/012113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
35
|
Bioactive coatings for orthopaedic implants-recent trends in development of implant coatings. Int J Mol Sci 2014; 15:11878-921. [PMID: 25000263 PMCID: PMC4139820 DOI: 10.3390/ijms150711878] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/11/2014] [Accepted: 06/16/2014] [Indexed: 01/21/2023] Open
Abstract
Joint replacement is a major orthopaedic procedure used to treat joint osteoarthritis. Aseptic loosening and infection are the two most significant causes of prosthetic implant failure. The ideal implant should be able to promote osteointegration, deter bacterial adhesion and minimize prosthetic infection. Recent developments in material science and cell biology have seen the development of new orthopaedic implant coatings to address these issues. Coatings consisting of bioceramics, extracellular matrix proteins, biological peptides or growth factors impart bioactivity and biocompatibility to the metallic surface of conventional orthopaedic prosthesis that promote bone ingrowth and differentiation of stem cells into osteoblasts leading to enhanced osteointegration of the implant. Furthermore, coatings such as silver, nitric oxide, antibiotics, antiseptics and antimicrobial peptides with anti-microbial properties have also been developed, which show promise in reducing bacterial adhesion and prosthetic infections. This review summarizes some of the recent developments in coatings for orthopaedic implants.
Collapse
|
36
|
Ling GC, Low MH, Erken M, Longford S, Nielsen S, Poole AJ, Steinberg P, McDougald D, Kjelleberg S. Micro-fabricated polydimethyl siloxane (PDMS) surfaces regulate the development of marine microbial biofilm communities. BIOFOULING 2014; 30:323-335. [PMID: 24558964 DOI: 10.1080/08927014.2013.872778] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study explored an antifouling (AF) concept based on deployment of microfabricated polydimethyl siloxane (PDMS) surfaces with 1-10 μm periodicity corrugated topographies in temperate marine waters. The effect of the surfaces on the development of microbial biofilms over 28 days and during different seasons, including both summer and winter, was examined using confocal laser scanning microscopy (CLSM) as well as terminal restriction fragment (T-RF) analysis for phylogenetic fingerprinting. The microscale topography significantly impacted biofilm development by altering the attachment pattern and reducing microcolony formation on the 1, 2 and 4 μm PDMS surfaces. Also, field deployments over 28 days showed a significant reduction in biovolume on the 4 and 10 μm PDMS surfaces despite altered environmental conditions. The microfabricated PDMS surfaces further significantly impacted on the community composition of the biofilms, as revealed by changes in T-RF profiles, at different stages of development. Moreover, altered biofilm resistance was demonstrated by exposing pre-established biofilms on 10 μm micro-fabricated surfaces to enhanced flagellate predation by a heterotrophic protist, Rhynchomonas nasuta. Pronounced changes in the overall marine microbial biofilm development as well as community composition warrant exploring substratum modification for marine AF applications.
Collapse
Affiliation(s)
- Gee Chong Ling
- a School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-Innovation , University of New South Wales , Sydney , NSW 2052 , Australia
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Boshkovikj V, Webb HK, Pham VTH, Fluke CJ, Crawford RJ, Ivanova EP. Three-dimensional reconstruction of surface nanoarchitecture from two-dimensional datasets. AMB Express 2014; 4:3. [PMID: 24410821 PMCID: PMC3917702 DOI: 10.1186/2191-0855-4-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 12/15/2013] [Indexed: 11/29/2022] Open
Abstract
The design of biomaterial surfaces relies heavily on the ability to accurately measure and visualize the three-dimensional surface nanoarchitecture of substrata. Here, we present a technique for producing three-dimensional surface models using displacement maps that are based on the data obtained from two-dimensional analyses. This technique is particularly useful when applied to scanning electron micrographs that have been calibrated using atomic force microscopy (AFM) roughness data. The evaluation of four different surface types, including thin titanium films, silicon wafers, polystyrene cell culture dishes and dragonfly wings confirmed that this technique is particularly effective for the visualization of conductive surfaces such as metallic titanium. The technique is particularly useful for visualizing surfaces that cannot be easily analyzed using AFM. The speed and ease with which electron micrographs can be recorded, combined with a relatively simple process for generating displacement maps, make this technique useful for the assessment of the surface topography of biomaterials.
Collapse
|
38
|
Neu TR, Lawrence JR. Investigation of microbial biofilm structure by laser scanning microscopy. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2014; 146:1-51. [PMID: 24840778 DOI: 10.1007/10_2014_272] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Microbial bioaggregates and biofilms are hydrated three-dimensional structures of cells and extracellular polymeric substances (EPS). Microbial communities associated with interfaces and the samples thereof may come from natural, technical, and medical habitats. For imaging such complex microbial communities confocal laser scanning microscopy (CLSM) is the method of choice. CLSM allows flexible mounting and noninvasive three-dimensional sectioning of hydrated, living, as well as fixed samples. For this purpose a broad range of objective lenses is available having different working distance and resolution. By means of CLSM the signals detected may originate from reflection, autofluorescence, reporter genes/fluorescence proteins, fluorochromes binding to specific targets, or other probes conjugated with fluorochromes. Recorded datasets can be used not only for visualization but also for semiquantitative analysis. As a result CLSM represents a very useful tool for imaging of microbiological samples in combination with other analytical techniques.
Collapse
Affiliation(s)
- Thomas R Neu
- Department of River Ecology, Helmholtz Centre for Environmental Research-UFZ, Brueckstrasse 3a, 39114, Magdeburg, Germany,
| | | |
Collapse
|
39
|
Javed MA, Stoddart PR, McArthur SL, Wade SA. The effect of metal microstructure on the initial attachment of Escherichia coli to 1010 carbon steel. BIOFOULING 2013; 29:939-952. [PMID: 23906317 DOI: 10.1080/08927014.2013.820826] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Metallurgical features have been shown to play an important role in the attachment of microorganisms to metal surfaces. In the present study, the influence of the microstructure of as-received (AR) and heat-treated (HT) 1010 carbon steel on the initial attachment of bacteria was investigated. Heat treatment was carried out with the aim of increasing the grain size of the carbon steel coupons. Mirror-polished carbon steel coupons were immersed in a minimal medium inoculated with Escherichia coli (ATCC 25922) to investigate the early (15, 30 and 60 min) and relatively longer-term (4 h) stages of bacterial attachment. The results showed preferential colonisation of bacteria on the grain boundaries of the steel coupons. The bacterial attachment to AR steel coupons was relatively uniform compared to the HT steel coupons where an increased number of localised aggregates of bacteria were found. Quantitative analysis showed that the ratio of the total number of isolated (i.e., single) bacteria to the number of bacteria in aggregates was significantly higher on the AR coupons than the HT coupons. Longer-term immersion studies showed production of extracellular polymeric substances by the bacteria and corrosion at the grain boundaries on both types of steel coupon tested.
Collapse
Affiliation(s)
- M A Javed
- Faculty of Engineering and Industrial Sciences, Biotactical Engineering, IRIS, Swinburne University of Technology, Hawthorn, Australia.
| | | | | | | |
Collapse
|
40
|
Mechanical strength and biocompatibility of ultrafine-grained commercial purity titanium. BIOMED RESEARCH INTERNATIONAL 2013; 2013:914764. [PMID: 23936857 PMCID: PMC3713372 DOI: 10.1155/2013/914764] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 06/06/2013] [Indexed: 11/28/2022]
Abstract
The effect of grain refinement of commercial purity titanium by equal channel angular pressing (ECAP) on its mechanical performance and bone tissue regeneration is reported. In vivo studies conducted on New Zealand white rabbits did not show an enhancement of biocompatibility of ECAP-modified titanium found earlier by in vitro testing. However, the observed combination of outstanding mechanical properties achieved by ECAP without a loss of biocompatibility suggests that this is a very promising processing route to bioimplant manufacturing. The study thus supports the expectation that commercial purity titanium modified by ECAP can be seen as an excellent candidate material for bone implants suitable for replacing conventional titanium alloy implants.
Collapse
|
41
|
Nguyen SHT, Webb HK, Hasan J, Tobin MJ, Crawford RJ, Ivanova EP. Dual role of outer epicuticular lipids in determining the wettability of dragonfly wings. Colloids Surf B Biointerfaces 2013; 106:126-34. [DOI: 10.1016/j.colsurfb.2013.01.042] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 01/21/2013] [Accepted: 01/21/2013] [Indexed: 01/16/2023]
|
42
|
Webb HK, Boshkovikj V, Fluke CJ, Truong VK, Hasan J, Baulin VA, Lapovok R, Estrin Y, Crawford RJ, Ivanova EP. Bacterial attachment on sub-nanometrically smooth titanium substrata. BIOFOULING 2013; 29:163-170. [PMID: 23327438 DOI: 10.1080/08927014.2012.757697] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Despite the volume of work that has been conducted on the topic, the role of surface topography in mediating bacterial cell adhesion is not well understood. The primary reason for this lack of understanding is the relatively limited extent of topographical characterisation employed in many studies. In the present study, the topographies of three sub-nanometrically smooth titanium (Ti) surfaces were comprehensively characterised, using nine individual parameters that together describe the height, shape and distribution of their surface features. This topographical analysis was then correlated with the adhesion behaviour of the pathogenic bacteria Staphylococcus aureus and Pseudomonas aeruginosa, in an effort to understand the role played by each aspect of surface architecture in influencing bacterial attachment. While P. aeruginosa was largely unable to adhere to any of the three sub-nanometrically smooth Ti surfaces, the extent of S. aureus cell attachment was found to be greater on surfaces with higher average, RMS and maximum roughness and higher surface areas. The cells also attached in greater numbers to surfaces that had shorter autocorrelation lengths and skewness values that approached zero, indicating a preference for less ordered surfaces with peak heights and valley depths evenly distributed around the mean plane. Across the sub-nanometrically smooth range of surfaces tested, it was shown that S. aureus more easily attached to surfaces with larger features that were evenly distributed between peaks and valleys, with higher levels of randomness. This study demonstrated that the traditionally employed amplitudinal roughness parameters are not the only determinants of bacterial adhesion, and that spatial parameters can also be used to predict the extent of attachment.
Collapse
Affiliation(s)
- H K Webb
- Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn, Australia
| | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Selective bactericidal activity of nanopatterned superhydrophobic cicada Psaltoda claripennis wing surfaces. Appl Microbiol Biotechnol 2012; 97:9257-62. [PMID: 23250225 DOI: 10.1007/s00253-012-4628-5] [Citation(s) in RCA: 185] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 11/26/2012] [Accepted: 11/28/2012] [Indexed: 12/15/2022]
Abstract
The nanopattern on the surface of Clanger cicada (Psaltoda claripennis) wings represents the first example of a new class of biomaterials that can kill bacteria on contact based solely on its physical surface structure. As such, they provide a model for the development of novel functional surfaces that possess an increased resistance to bacterial contamination and infection. Their effectiveness against a wide spectrum of bacteria, however, is yet to be established. Here, the bactericidal properties of the wings were tested against several bacterial species, possessing a range of combinations of morphology and cell wall type. The tested species were primarily pathogens, and included Bacillus subtilis, Branhamella catarrhalis, Escherichia coli, Planococcus maritimus, Pseudomonas aeruginosa, Pseudomonas fluorescens, and Staphylococcus aureus. The wings were found to consistently kill Gram-negative cells (i.e., B. catarrhalis, E. coli, P. aeruginosa, and P. fluorescens), while Gram-positive cells (B. subtilis, P. maritimus, and S. aureus) remained resistant. The morphology of the cells did not appear to play any role in determining cell susceptibility. The bactericidal activity of the wing was also found to be quite efficient; 6.1 ± 1.5 × 10(6) P. aeruginosa cells in suspension were inactivated per square centimeter of wing surface after 30-min incubation. These findings demonstrate the potential for the development of selective bactericidal surfaces incorporating cicada wing nanopatterns into the design.
Collapse
|
44
|
Hasan J, Webb HK, Truong VK, Watson GS, Watson JA, Tobin MJ, Gervinskas G, Juodkazis S, Wang JY, Crawford RJ, Ivanova EP. Spatial variations and temporal metastability of the self-cleaning and superhydrophobic properties of damselfly wings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012. [PMID: 23181510 DOI: 10.1021/la303560w] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Self-cleaning surfaces found in nature show great potential for application in many fields, ranging from industry to medicine. The ability for a surface to self-clean is intimately related to the wetting properties of the surface; for a surface to possess self-cleaning ability it must exhibit extremely high water contact angles and low water adhesion. While investigating the self-cleaning properties of damselfly wings, significant spatial variations in surface wettability were observed. Within an area of 100 μm × 100 μm of the wing surface the water contact angle was found to vary up to 17.8°, while remaining consistently superhydrophobic. The contributions of both surface chemistry and topography to the hydrophobicity of the wings were assessed in an effort to explain these variations. Synchrotron-sourced Fourier-transform infrared microspectroscopy revealed that some of the major components of the wing were aliphatic hydrocarbons and esters, which are attributable to epicuticular lipids. The wing topography, as determined by optical profilometry and atomic force microscopy (AFM), also showed only minor levels of heterogeneity arising from irregular ordering of surface nanostructures. The measured contact angle of a single droplet of water was also found to decrease over time as it evaporated, reaching a minimum of 107°. This is well below the threshold value for superhydrophobicity (i.e., 150°), demonstrating that when the surface is in contact with water for a prolonged period, the damselfly wings lose their superhydrophobicity and subsequently their ability to self-clean. This decrease in hydrophobicity over time can be attributed to the surface undergoing a transition from the Cassie-Baxter wettability state toward the Wenzel wettability state.
Collapse
Affiliation(s)
- Jafar Hasan
- Faculty Life and Social Sciences, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria, 3122, Australia
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Crawford RJ, Webb HK, Truong VK, Hasan J, Ivanova EP. Surface topographical factors influencing bacterial attachment. Adv Colloid Interface Sci 2012; 179-182:142-9. [PMID: 22841530 DOI: 10.1016/j.cis.2012.06.015] [Citation(s) in RCA: 195] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 06/13/2012] [Accepted: 06/28/2012] [Indexed: 12/17/2022]
Abstract
Substratum surface roughness is known to be one of the key factors in determining the extent of bacterial colonization. Understanding the way by which the substratum topography, especially at the nanoscale, mediates bacterial attachment remains ambiguous at best, despite the volume of work available on the topic. This is because the vast majority of bacterial attachment studies do not perform comprehensive topographical characterization analyses, and typically consider roughness parameters that describe only one aspect of the surface topography. The most commonly reported surface roughness parameters are average and root mean square (RMS) roughness (R(a) and R(q) respectively), which are both measures of the typical height variation of the surface. They offer no insights into the spatial distribution or shape of the surface features. Here, a brief overview of the current state of research on topography-mediated bacterial adhesion is presented, as well as an outline of the suite of roughness characterization parameters that are available for the comprehensive description of the surface architecture of a substratum. Finally, a set of topographical parameters is proposed as a new standard for surface roughness characterization in bacterial adhesion studies to improve the likelihood of identifying direct relationships between substratum topography and the extent of bacterial adhesion.
Collapse
Affiliation(s)
- Russell J Crawford
- Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn, VIC, Australia.
| | | | | | | | | |
Collapse
|
46
|
Ivanova EP, Hasan J, Webb HK, Truong VK, Watson GS, Watson JA, Baulin VA, Pogodin S, Wang JY, Tobin MJ, Löbbe C, Crawford RJ. Natural bactericidal surfaces: mechanical rupture of Pseudomonas aeruginosa cells by cicada wings. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:2489-94. [PMID: 22674670 DOI: 10.1002/smll.201200528] [Citation(s) in RCA: 491] [Impact Index Per Article: 40.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Indexed: 05/22/2023]
Abstract
Natural superhydrophobic surfaces are often thought to have antibiofouling potential due to their self-cleaning properties. However, when incubated on cicada wings, Pseudomonas aeruginosa cells are not repelled; instead they are penetrated by the nanopillar arrays present on the wing surface, resulting in bacterial cell death. Cicada wings are effective antibacterial, as opposed to antibiofouling, surfaces.
Collapse
Affiliation(s)
- Elena P Ivanova
- Faculty of Life and Social Sciences, Swinburne University of Technology, P.O. Box 218, Hawthorn, 3122, Australia.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Efficient surface modification of biomaterial to prevent biofilm formation and the attachment of microorganisms. Appl Microbiol Biotechnol 2012; 95:299-311. [DOI: 10.1007/s00253-012-4144-7] [Citation(s) in RCA: 169] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 04/27/2012] [Accepted: 04/28/2012] [Indexed: 02/07/2023]
|
48
|
Durmus NG, Taylor EN, Inci F, Kummer KM, Tarquinio KM, Webster TJ. Fructose-enhanced reduction of bacterial growth on nanorough surfaces. Int J Nanomedicine 2012; 7:537-45. [PMID: 22334783 PMCID: PMC3273985 DOI: 10.2147/ijn.s27957] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Patients on mechanical ventilators for extended periods of time often face the risk of developing ventilator-associated pneumonia. During the ventilation process, patients incapable of breathing are intubated with polyvinyl chloride (PVC) endotracheal tubes (ETTs). PVC ETTs provide surfaces where bacteria can attach and proliferate from the contaminated oropharyngeal space to the sterile bronchoalveolar area. To overcome this problem, ETTs can be coated with antimicrobial agents. However, such coatings may easily delaminate during use. Recently, it has been shown that changes in material topography at the nanometer level can provide antibacterial properties. In addition, some metabolites, such as fructose, have been found to increase the efficiency of antibiotics used to treat Staphylococcus aureus (S. aureus) infections. In this study, we combined the antibacterial effect of nanorough ETT topographies with sugar metabolites to decrease bacterial growth and biofilm formation on ETTs. We present for the first time that the presence of fructose on the nanorough surfaces decreases the number of planktonic S. aureus bacteria in the solution and biofilm formation on the surface after 24 hours. We thus envision that this method has the potential to impact the future of surface engineering of biomaterials leading to more successful clinical outcomes in terms of longer ETT lifetimes, minimized infections, and decreased antibiotic usage; all of which can decrease the presence of antibiotic resistant bacteria in the clinical setting.
Collapse
|
49
|
Truong VK, Webb HK, Fadeeva E, Chichkov BN, Wu AHF, Lamb R, Wang JY, Crawford RJ, Ivanova EP. Air-directed attachment of coccoid bacteria to the surface of superhydrophobic lotus-like titanium. BIOFOULING 2012; 28:539-50. [PMID: 22686938 DOI: 10.1080/08927014.2012.694426] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Superhydrophobic titanium surfaces fabricated by femtosecond laser ablation to mimic the structure of lotus leaves were assessed for their ability to retain coccoid bacteria. Staphylococcus aureus CIP 65.8T, S. aureus ATCC 25923, S. epidermidis ATCC 14990T and Planococcus maritimus KMM 3738 were retained by the surface, to varying degrees. However, each strain was found to preferentially attach to the crevices located between the microscale surface features. The upper regions of the microscale features remained essentially cell-free. It was hypothesised that air entrapped by the topographical features inhibited contact between the cells and the titanium substratum. Synchrotron SAXS revealed that even after immersion for 50 min, nano-sized air bubbles covered 45% of the titanium surface. After 1 h the number of cells of S. aureus CIP 65.8T attached to the lotus-like titanium increased to 1.27×10(5) mm(-2), coinciding with the replacement of trapped air by the incubation medium.
Collapse
Affiliation(s)
- V K Truong
- Faculty of Life and Social Sciences, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria, 3122, Australia
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Ivanova EP, Truong VK, Webb HK, Baulin VA, Wang JY, Mohammodi N, Wang F, Fluke C, Crawford RJ. Differential attraction and repulsion of Staphylococcus aureus and Pseudomonas aeruginosa on molecularly smooth titanium films. Sci Rep 2011; 1:165. [PMID: 22355680 PMCID: PMC3240996 DOI: 10.1038/srep00165] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Accepted: 10/27/2011] [Indexed: 11/23/2022] Open
Abstract
Magnetron sputtering techniques were used to prepare molecularly smooth titanium thin films
possessing an average roughness between 0.18 nm and 0.52 nm over 5 μm × 5 μm AFM scanning
areas. Films with an average roughness of 0.52 nm or lower were found to restrict the extent
of P. aeruginosa cell attachment, with less than 0.5% of all available cells being
retained on the surface. The attachment of S. aureus cells was also limited on films
with an average surface roughness of 0.52 nm, however they exhibited a remarkable propensity
for attachment on the nano-smoother 0.18 nm average surface roughness films, with the
attachment density being almost twice as great as that observed on the nano-rougher film.
The difference in attachment behaviour can be attributed to the difference in morphology of
the rod-shaped P. aeruginosa compared to the spherical S. aureus cells.
Collapse
Affiliation(s)
- Elena P Ivanova
- Faculty of Life and Social Sciences, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria, 3122, Australia.
| | | | | | | | | | | | | | | | | |
Collapse
|