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Bitalac JMS, Lantican NB, Gomez NCF, Onda DFL. Attachment of potential cultivable primo-colonizing bacteria and its implications on the fate of low-density polyethylene (LDPE) plastics in the marine environment. JOURNAL OF HAZARDOUS MATERIALS 2023; 451:131124. [PMID: 36871466 DOI: 10.1016/j.jhazmat.2023.131124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 02/27/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
Plastics released in the environment become suitable matrices for microbial attachment and colonization. Plastics-associated microbial communities interact with each other and are metabolically distinct from the surrounding environment. However, pioneer colonizing species and their interaction with the plastic during initial colonization are less described. Marine sediment bacteria from sites in Manila Bay were isolated via a double selective enrichment method using sterilized low-density polyethylene (LDPE) sheets as the sole carbon source. Ten isolates were identified to belong to the genera Halomonas, Bacillus, Alteromonas, Photobacterium, and Aliishimia based on 16S rRNA gene phylogeny, and majority of the taxa found exhibit a surface-associated lifestyle. Isolates were then tested for their ability to colonize polyethylene (PE) through co-incubation with LDPE sheets for 60 days. Growth of colonies in crevices, formation of cell-shaped pits, and increased roughness of the surface indicate physical deterioration. Fourier-transform infrared (FT-IR) spectroscopy revealed significant changes in the functional groups and bond indices on LDPE sheets separately co-incubated with the isolates, demonstrating that different species potentially target different substrates of the photo-oxidized polymer backbone. Understanding the activity of primo-colonizing bacteria on the plastic surface can provide insights on the possible mechanisms used to make plastic more bioavailable for other species, and their implications on the fate of plastics in the marine environment.
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Affiliation(s)
- Justine Marey S Bitalac
- The Marine Science Institute, University of the Philippines Diliman, 1101 Quezon City, Philippines; Microbiology Division, Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños, 4031 Laguna, Philippines
| | - Nacita B Lantican
- Microbiology Division, Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños, 4031 Laguna, Philippines
| | - Norchel Corcia F Gomez
- The Marine Science Institute, University of the Philippines Diliman, 1101 Quezon City, Philippines; Microbiology Division, Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños, 4031 Laguna, Philippines
| | - Deo Florence L Onda
- The Marine Science Institute, University of the Philippines Diliman, 1101 Quezon City, Philippines.
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Bamane PB, Jagtap RN. Development of the hydrophilic additive by suspension copolymerisation of methacrylic acid with isodecyl methacrylate for easy-to-clean coatings. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04193-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Song Y, Sun Q, Luo J, Kong Y, Pan B, Zhao J, Wang Y, Yu C. Cationic and Anionic Antimicrobial Agents Co-Templated Mesostructured Silica Nanocomposites with a Spiky Nanotopology and Enhanced Biofilm Inhibition Performance. NANO-MICRO LETTERS 2022; 14:83. [PMID: 35348927 PMCID: PMC8964905 DOI: 10.1007/s40820-022-00826-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/22/2022] [Indexed: 05/13/2023]
Abstract
HIGHLIGHTS A ‘dual active templating’ strategy is firstly reported, using cationic and anionic bactericidal agents as co-templates for the preparation of antibacterial silica nanocomposite with spiky nanotopography. The spiky nanocomposite exhibited enhanced antibacterial and biofilm inhibition performance, compared to pure antimicrobial cationic agent templated smooth silica nanocomposite. ABSTRACT Silica-based materials are usually used as delivery systems for antibacterial applications. In rare cases, bactericidal cationic surfactant templated silica composites have been reported as antimicrobial agents. However, their antibacterial efficacy is limited due to limited control in content and structure. Herein, we report a “dual active templating” strategy in the design of nanostructured silica composites with intrinsic antibacterial performance. This strategy uses cationic and anionic structural directing agents as dual templates, both with active antibacterial property. The cationic-anionic dual active templating strategy further contributes to antibacterial nanocomposites with a spiky surface. With controllable release of dual active antibacterial agents, the spiky nanocomposite displays enhanced anti-microbial and anti-biofilm properties toward Staphylococcus epidermidis. These findings pave a new avenue toward the designed synthesis of novel antibacterial nanocomposites with improved performance for diverse antibacterial applications. [Image: see text] SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s40820-022-00826-4.
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Affiliation(s)
- Yaping Song
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Qiang Sun
- Centre for Microscopy and Microanalysis, University of Queensland, Brisbane, QLD, 4072, Australia
| | - Jiangqi Luo
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yueqi Kong
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Bolin Pan
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Jing Zhao
- Australia Centre for Water and Environmental Biotechnology, University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yue Wang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, People's Republic of China.
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Janiszewska N, Raczkowska J, Grzegorczyk K, Brzychczy-Włoch M, Gosiewski T, Marzec MM, Gajos K, Awsiuk K. Effect of poly(tert-butyl methacrylate) stereoregularity on polymer film interactions with peptides, proteins, and bacteria. Colloids Surf B Biointerfaces 2021; 210:112248. [PMID: 34864636 DOI: 10.1016/j.colsurfb.2021.112248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/20/2021] [Accepted: 11/23/2021] [Indexed: 10/19/2022]
Abstract
The impact of polymer stereoregularity on its interactions with peptides, proteins and bacteria strains was studied for three stereoregular forms of poly(tert-butyl methacrylate) (PtBMA): isotactic (iso), atactic (at) and syndiotactic (syn) PtBMA. Principal component analysis of the time-of-flight secondary ion mass spectrometry data recorded for thin polymer films indicated a different orientation of ester groups, which in the case of iso-PtBMA are exposed away from the surface whereas for at-PtBMA and syn-PtBMA these are located deeper within the film. This arrangement of chemical groups modified the interactions of iso-PtBMA with biomolecules when compared to at-PtBMA and syn-PtBMA. For peptides, the affected interactions were explained by the preferential hydrogen bonding and electrostatic interaction between the exposed polar ester groups of iso-PtBMA and positively charged peptides. In turn, for protein adsorption no impact on the amount of adsorbed proteins was observed. However, the polymer stereoregularity influenced the orientation of immunoglobulin G and induced conformational changes in bovine serum albumin structure. Moreover, the impact of polymer stereoregularity occurred equally for their interactions with Gram-positive bacteria (S. aureus), which absorbed preferentially onto iso-PtBMA films as compared to two other stereoregularities.
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Affiliation(s)
- Natalia Janiszewska
- M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Joanna Raczkowska
- M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Karolina Grzegorczyk
- M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Monika Brzychczy-Włoch
- Chair of Microbiology, Department of Molecular Medical Microbiology Faculty of Medicine, Jagiellonian University Medical College, Czysta 18 Street, 31-121 Krakow, Poland
| | - Tomasz Gosiewski
- Chair of Microbiology, Department of Molecular Medical Microbiology Faculty of Medicine, Jagiellonian University Medical College, Czysta 18 Street, 31-121 Krakow, Poland
| | - Mateusz M Marzec
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Katarzyna Gajos
- M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Kamil Awsiuk
- M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland.
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Tsikopoulos K, Drago L, Koutras G, Givissis P, Vagdatli E, Soukiouroglou P, Papaioannidou P. Radial Extracorporeal Shock Wave Therapy Against Cutibacterium acnes Implant-Associated Infections: An in Vitro Trial. Microorganisms 2020; 8:E743. [PMID: 32429267 PMCID: PMC7285346 DOI: 10.3390/microorganisms8050743] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/29/2020] [Accepted: 05/11/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Antibiotic management of low-virulent implant-associated infections induced by Cutibacterium acnes may be compromised by multi-drug resistance development, side effects, and increased cost. Therefore, we sought to assess the effects of shock wave therapy against the above pathogen using an in vitro model of infection. METHODS We used a total of 120 roughened titanium alloy disks, simulating orthopedic biomaterials, to assess the results of radial extracorporeal shock wave therapy (rESWT) against C. acnes (ATCC 11827) biofilms relative to untreated control. In particular, we considered 1.6 to 2.5 Bar with a frequency ranging from 8-11 Hz and 95 to 143 impulses per disk to investigate the antibacterial effect of rESWT against C. acnes planktonic (free-floating) and biofilm forms. RESULTS Planktonic bacteria load diminished by 54% compared to untreated control after a 1.8-bar setting with a frequency of 8 Hz and 95 impulses was applied (median absorbance (MA) for intervention vs. control groups was 0.9245 (IQR= 0.888 to 0.104) vs. 0.7705 (IQR = 0.712 to 0.864), respectively, p = 0.001). Likewise, a statistically significant reduction in the amount of biofilm relative to untreated control was documented when the above setting was considered (MA for treatment vs biofilm control groups was 0.244 (IQR= 0.215-0.282) and 0.298 (IQR = 0.247-0.307), respectively, p = 0.033). CONCLUSION A 50% biofilm eradication was documented following application of low-pressure and low-frequency radial shock waves, so rESWT could be investigated as an adjuvant treatment to antibiotics, but it cannot be recommended as a standalone treatment against device-associated infections induced by C. ances.
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Affiliation(s)
- Konstantinos Tsikopoulos
- 1st Department of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
| | - Lorenzo Drago
- Laboratory of Clinical Microbiology, Department of Biochemical Sciences for Health, University of Milan, 20133 Milan, Italy;
| | - Georgios Koutras
- Department of Physical Therapy, Technological Education Institute of Thessaloniki, 57400 Sindos, Greece;
| | - Panagiotis Givissis
- 1st Orthopaedic Department of Aristotle University, G. Papanikolaou General Hospital, Exohi, 57010 Thessaloniki, Greece;
| | - Eleni Vagdatli
- Laboratory of Microbiology, Hippokration Hospital, 54642 Thessaloniki, Greece; (E.V.); (P.S.)
| | - Prodromos Soukiouroglou
- Laboratory of Microbiology, Hippokration Hospital, 54642 Thessaloniki, Greece; (E.V.); (P.S.)
| | - Paraskevi Papaioannidou
- 1st Department of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
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Tsikopoulos K, Bidossi A, Drago L, Petrenyov DR, Givissis P, Mavridis D, Papaioannidou P. Is Implant Coating With Tyrosol- and Antibiotic-loaded Hydrogel Effective in Reducing Cutibacterium (Propionibacterium) acnes Biofilm Formation? A Preliminary In Vitro Study. Clin Orthop Relat Res 2019; 477:1736-1746. [PMID: 31135555 PMCID: PMC6999983 DOI: 10.1097/corr.0000000000000663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/10/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND Studies have suggested that Cutibacterium acnes (formerly known as Propionibacterium) is the most frequently isolated pathogen after shoulder arthroplasty. To address the burden of periprosthetic joint infections associated with this pathogen, new prevention methods are needed. Tyrosol has a promising record of effectiveness in the field of biofilm-associated infections; however, to our knowledge, it has not been tested against C. acnes thus far. QUESTIONS/PURPOSES In this in vitro study, we asked: (1) Is tyrosol effective in inhibiting and eradicating C. acnes planktonic growth? (2) Is there synergy between tyrosol and rifampicin? (3) Is supplementation of hydrogel with tyrosol at the minimum inhibitory and subinhibitory concentrations efficacious in reducing free-floating C. acnes growth? (4) Is implant hydrogel coating (either alone or combined with tyrosol, rifampicin, or vancomycin) beneficial in reducing C. acnes biofilm formation? (5) Is the administration of soluble tyrosol an effective measure against C. acnes biofilm formation? METHODS We assessed C. acnes planktonic growth and eradication by inspecting visually the results of the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) assays. We also evaluated macroscopically the presence of synergy among tyrosol and rifampicin by means of the MIC checkerboard testing. Thereafter, we addressed colorimetrically the efficacy of tyrosol-loaded Defensive Antibacterial Coating (DAC®) hydrogel against the C. acnes free-floating form by means of the XTT cell proliferation reduction assay. Then, we explored photometrically the effect of hydrogel and soluble tyrosol at reducing C. acnes biofilm formation on titanium alloy disks that simulated orthopaedic implants by using the minimum biofilm inhibition concentration assay. In particular, 16 disks were sequentially allocated to each of the following testing conditions: (1) hydrogel alone; (2) tyrosol-loaded hydrogel; (3) rifampicin-supplemented hydrogel; (4) vancomycin-loaded hydrogel; and (5) soluble tyrosol. Subsequently, implants were sonicated and cell viability was evaluated in terms of the XTT assay. RESULTS Tyrosol was effective in inhibiting C. acnes planktonic (free-floating) growth demonstrating MIC values of 63 mM (9 mg/mL) and MBC values of 250 mM (35 mg/mL). Concerning synergy assessment, the checkerboard testing revealed additivity among tyrosol and rifampicin with a fractional inhibitory concentration index of 0.56. In addition, a hydrogel coating with tyrosol at the MIC showed no difference in the inhibition of free-floating C. Acnes form over control (median absorbance [MA] for tyrosol-supplemented hydrogel versus control groups were 0.21 [interquartile range {IQR}, 0.19-0.24] versus 0.26 [IQR, 0.23-0.31], p = 0.066). Furthermore, loaded hydrogel with tyrosol at 597 mg/mL (1 M) was no more effective than control in reducing C. acnes biofilm formation (MAs for tyrosol versus control were 0.12 [IQR, 0.11-0.13] versus 0.14 [IQR, 0.12-0.16], respectively; p = 0.076). This was also the case when we considered hydrogel in conjunction with vancomycin and rifampicin (MAs for vancomycin at 2% and 5% and rifampicin at 1% versus biofilm control were 0.139 [IQR, 0.133-0.143] and 0.141 [IQR, 0.133-0.143] and 0.135 [IQR, 0.128-0.146] versus 0.142 [IQR, 0.136-0.144], correspondingly). In contrast, soluble tyrosol at 597 mg/mL (1 M) inhibited biofilm formation compared to control (MAs for tyrosol and control groups were 0.11 [IQR, 0.09-0.13] versus 0.13 [IQR, 0.12-0.14], p = 0.007). CONCLUSIONS Although the implant coating with hydrogel (either pure or supplemented with antimicrobial agents) did not diminish C. acnes biofilm development in vitro, soluble tyrosol at 597 mg/mL (1 M) exceeded the meaningful biofilm inhibition threshold of 80%. CLINICAL RELEVANCE The results of the current preclinical investigation did not support the use of a fast, bioresorbable hydrogel as a coating method against C. acnes biofilms. Instead, direct local administration of soluble tyrosol at high concentrations should be further tested in future animal studies.
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Affiliation(s)
- Konstantinos Tsikopoulos
- K. Tsikopoulos, P. Papaioannidou, 1st Department of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece K. Tsikopoulos, 424 Army General Training Hospital, Thessaloniki, Greece; and 2nd Orthopaedic Department, Papageorgiou General Hospital, Thessaloniki, Greece A. Bidossi, IRCCS Orthopedic Institute Galeazzi, Laboratory of Clinical Chemistry and Microbiology, Milan, Italy L. Drago, Laboratory of Clinical Microbiology, Department of Biochemical Sciences for Health, University of Milan, Milan, Italy D. R. Petrenyov, Gomel State Medical University, Scientific Research Laboratory, Gomel, Belarus; and Institute of Radiobiology of National Academy of Sciences, Laboratory of Endocrinology and Biochemistry, Gomel, Belarus P. Givissis, 1st Orthopaedic Department of Aristotle University, G. Papanikolaou General, Hospital, Exohi, Thessaloniki, Greece D. Mavridis, Department of Primary Education, University of Ioannina, University Campus, Ioannina, Greece
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Deng L, Li W, He Y, Wu J, Ren B, Zou L. Cross-kingdom interaction of Candida albicans and Actinomyces viscosus elevated cariogenic virulence. Arch Oral Biol 2019; 100:106-112. [PMID: 30822704 DOI: 10.1016/j.archoralbio.2019.02.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/27/2019] [Accepted: 02/15/2019] [Indexed: 02/05/2023]
Abstract
OBJECTIVE How the interactions between Candida albicans and Actinomyces viscosus contributed to the root caries was not clear. This study aimed to investigate their cross-kingdom interactions on the biomass and the cariogenic virulence in dual-species biofilms. DESIGN Suspensions of C. albicans and A. viscosus were formed the mono and polymicrobial biofilms in vitro. Crystal violet assay, viable plate count, scanning electron microscopy and fluorescence in situ hybridization were used to analyze the biomass and biofilm structure. Glycolytic pH drop and the spectrophotometric method were used to evaluate the acid production and hydroxyapatite dissolution, respectively. The exopolysaccharide production was measured by the anthrone-sulfuric acid method, while the adhesion force was measured by atomic force microscopy. RESULTS The biomass and colony-forming units of mixed-species were significantly increased compared to that of the mono-species at 24 h, 48 h, 72 h. The structure of dual-species biofilm had more microcolonies and was much denser. The dual-species biofilms significantly decreased the pH value and damaged the hydroxyapatite compared with the mono-species biofilms at various time points, indicating the strong cariogenic virulence. Moreover, the dual-species biofilms significantly enhanced the exopolysaccharide production and adhesion force suggesting the increase of biofilm adhesion. CONCLUSIONS Cross-kingdom interactions of C. albicans and A. viscosus significantly elevated the biomass and cariogenic virulence of dual-species biofilm.
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Affiliation(s)
- Ling Deng
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Wei Li
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Yuanli He
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Juan Wu
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Biao Ren
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Ling Zou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
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Orapiriyakul W, Young PS, Damiati L, Tsimbouri PM. Antibacterial surface modification of titanium implants in orthopaedics. J Tissue Eng 2018; 9:2041731418789838. [PMID: 30083308 PMCID: PMC6071164 DOI: 10.1177/2041731418789838] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/29/2018] [Indexed: 12/18/2022] Open
Abstract
The use of biomaterials in orthopaedics for joint replacement, fracture healing and bone regeneration is a rapidly expanding field. Infection of these biomaterials is a major healthcare burden, leading to significant morbidity and mortality. Furthermore, the cost to healthcare systems is increasing dramatically. With advances in implant design and production, research has predominately focussed on osseointegration; however, modification of implant material, surface topography and chemistry can also provide antibacterial activity. With the increasing burden of infection, it is vitally important that we consider the bacterial interaction with the biomaterial and the host when designing and manufacturing future implants. During this review, we will elucidate the interaction between patient, biomaterial surface and bacteria. We aim to review current and developing surface modifications with a view towards antibacterial orthopaedic implants for clinical applications.
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Affiliation(s)
- Wich Orapiriyakul
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Peter S Young
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Laila Damiati
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Penelope M Tsimbouri
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
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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.
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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.
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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: 226] [Impact Index Per Article: 25.1] [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.
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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
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Self-organised nanoarchitecture of titanium surfaces influences the attachment of Staphylococcus aureus and Pseudomonas aeruginosa bacteria. Appl Microbiol Biotechnol 2015; 99:6831-40. [DOI: 10.1007/s00253-015-6572-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/22/2015] [Accepted: 03/24/2015] [Indexed: 10/23/2022]
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Chen M, Yu Q, Sun H. Novel strategies for the prevention and treatment of biofilm related infections. Int J Mol Sci 2013; 14:18488-501. [PMID: 24018891 PMCID: PMC3794791 DOI: 10.3390/ijms140918488] [Citation(s) in RCA: 242] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 08/28/2013] [Accepted: 08/30/2013] [Indexed: 02/06/2023] Open
Abstract
Biofilm formation by human bacterial pathogens on implanted medical devices causes major morbidity and mortality among patients, and leads to billions of dollars in healthcare cost. Biofilm is a complex bacterial community that is highly resistant to antibiotics and human immunity. As a result, novel therapeutic solutions other than the conventional antibiotic therapies are in urgent need. In this review, we will discuss the recent research in discovery of alternative approaches to prevent or treat biofilms. Current anti-biofilm technologies could be divided into two groups. The first group focuses on targeting the biofilm forming process of bacteria based on our understanding of the molecular mechanism of biofilm formation. Small molecules and enzymes have been developed to inhibit or disrupt biofilm formation. Another group of anti-biofilm technologies focuses on modifying the biomaterials used in medical devices to make them resistant to biofilm formation. While these novel anti-biofilm approaches are still in nascent phases of development, efforts devoted to these technologies could eventually lead to anti-biofilm therapies that are superior to the current antibiotic treatment.
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Affiliation(s)
- Meng Chen
- Nanova, Inc. Columbia, MO 65211, USA; E-Mail: or
| | - Qingsong Yu
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA; E-Mail:
| | - Hongmin Sun
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Missouri, Columbia, MO 65212, USA
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-573-884-1964; Fax: +1-573-884-7743
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13
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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.
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Affiliation(s)
- Russell J Crawford
- Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn, VIC, Australia.
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14
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Ma Y, Chen M, Jones JE, Ritts AC, Yu Q, Sun H. Inhibition of Staphylococcus epidermidis biofilm by trimethylsilane plasma coating. Antimicrob Agents Chemother 2012; 56:5923-37. [PMID: 22964248 PMCID: PMC3486604 DOI: 10.1128/aac.01739-12] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 08/31/2012] [Indexed: 12/14/2022] Open
Abstract
Biofilm formation on implantable medical devices is a major impediment to the treatment of nosocomial infections and promotes local progressive tissue destruction. Staphylococcus epidermidis infections are the leading cause of biofilm formation on indwelling devices. Bacteria in biofilms are highly resistant to antibiotic treatment, which in combination with the increasing prevalence of antibiotic resistance among human pathogens further complicates treatment of biofilm-related device infections. We have developed a novel plasma coating technology. Trimethylsilane (TMS) was used as a monomer to coat the surfaces of 316L stainless steel and grade 5 titanium alloy, which are widely used in implantable medical devices. The results of biofilm assays demonstrated that this TMS coating markedly decreased S. epidermidis biofilm formation by inhibiting the attachment of bacterial cells to the TMS-coated surfaces during the early phase of biofilm development. We also discovered that bacterial cells on the TMS-coated surfaces were more susceptible to antibiotic treatment than their counterparts in biofilms on uncoated surfaces. These findings suggested that TMS coating could result in a surface that is resistant to biofilm development and also in a bacterial community that is more sensitive to antibiotic therapy than typical biofilms.
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Affiliation(s)
- Yibao Ma
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Missouri, Columbia, Missouri, USA
| | - Meng Chen
- Nanova, Inc., Columbia, Missouri, USA
| | - John E. Jones
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri, USA
| | | | - Qingsong Yu
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri, USA
| | - Hongmin Sun
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Missouri, Columbia, Missouri, USA
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15
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Lorite GS, de Souza AA, Neubauer D, Mizaikoff B, Kranz C, Cotta MA. On the role of extracellular polymeric substances during early stages of Xylella fastidiosa biofilm formation. Colloids Surf B Biointerfaces 2012; 102:519-25. [PMID: 23164974 DOI: 10.1016/j.colsurfb.2012.08.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 08/09/2012] [Accepted: 08/16/2012] [Indexed: 01/15/2023]
Abstract
The structural integrity and protection of bacterial biofilms are intrinsically associated with a matrix of extracellular polymeric substances (EPS) produced by the bacteria cells. However, the role of these substances during biofilm adhesion to a surface remains largely unclear. In this study, the influence of EPS on Xylella fastidiosa biofilm formation was investigated. This bacterium is associated with economically important plant diseases; it presents a slow growth rate and thus allows us to pinpoint more precisely the early stages of cell-surface adhesion. Scanning electron microscopy and atomic force microscopy show evidence of EPS production in such early stages and around individual bacteria cells attached to the substrate surface even a few hours after inoculation. In addition, EPS formation was investigated via attenuated total reflectance (ATR) Fourier transform infrared spectroscopy (FTIR). To this end, X. fastidiosa cells were inoculated within an ATR liquid cell assembly. IR-ATR spectra clearly reveal EPS formation already during the early stages of X. fastidiosa biofilm formation, thereby providing supporting evidence for the hypothesis of the relevance of the EPS contribution to the adhesion process.
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Affiliation(s)
- Gabriela S Lorite
- Departamento de Física Aplicada, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Rua Sergio Buarque de Holanda, no 777 Cidade Universitária Zeferino Vaz, 13083-859 Campinas, SP, Brazil.
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16
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Petersen J, Brinkmann H, Bunk B, Michael V, Päuker O, Pradella S. Think pink: photosynthesis, plasmids and the Roseobacter clade. Environ Microbiol 2012; 14:2661-72. [PMID: 22732061 DOI: 10.1111/j.1462-2920.2012.02806.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Aerobic anoxygenic photosynthesis providing additional ATP for a photoheterotrophic lifestyle is characteristic for several representatives of the marine Roseobacter clade. The patchy distribution of photosynthesis gene clusters (PGCs) within this lineage probably results from horizontal transfers and this explanation is supported by two cases of plasmid-located PGCs. In this study sequencing of the three Sulfitobacter guttiformis plasmids (pSG4, pSG53, pSG118) was initiated with the objective to analyse the 118 kb-sized photosynthetic replicon, but our annotation revealed several additional important traits including key genes of the primary metabolism. The comparison of the two photosynthesis plasmids from S. guttiformis and Roseobacter litoralis showed that their replication modules are located at precisely the same position within the 45 kb-sized PGC. However, comprehensive phylogenetic analyses of the non-homologous replicases (RepB-III, DnaA-like I) and the two ParAB partitioning proteins unequivocally document an independent origin of their extrachromosomal replicons. The analogous positioning within the two photosynthesis super-operons can be explained by a two-step recombination scenario and seems to be the ultimate result of stabilizing selection. Our exemplary analyses of 'pink' plasmids document that chromosomal outsourcing is a common phenomenon in the Roseobacter clade and subsequent horizontal exchanges offer rapid access to the marine pan-genome.
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Affiliation(s)
- Jörn Petersen
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstraße 7 B, D-38124 Braunschweig, Germany.
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17
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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]
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18
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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.
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Affiliation(s)
- Elena P Ivanova
- Faculty of Life and Social Sciences, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria, 3122, Australia.
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19
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Bazaka K, Crawford RJ, Ivanova EP. Do bacteria differentiate between degrees of nanoscale surface roughness? Biotechnol J 2011; 6:1103-14. [PMID: 21910258 DOI: 10.1002/biot.201100027] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Revised: 07/13/2011] [Accepted: 07/22/2011] [Indexed: 11/08/2022]
Abstract
Whereas the employment of nanotechnology in electronics and optics engineering is relatively well established, the use of nanostructured materials in medicine and biology is undoubtedly novel. Certain nanoscale surface phenomena are being exploited to promote or prevent the attachment of living cells. However, as yet, it has not been possible to develop methods that completely prevent cells from attaching to solid surfaces, since the mechanisms by which living cells interact with the nanoscale surface characteristics of these substrates are still poorly understood. Recently, novel and advanced surface characterisation techniques have been developed that allow the precise molecular and atomic scale characterisation of both living cells and the solid surfaces to which they attach. Given this additional capability, it may now be possible to define boundaries, or minimum dimensions, at which a surface feature can exert influence over an attaching living organism.This review explores the current research on the interaction of living cells with both native and nanostructured surfaces, and the role that these surface properties play in the different stages of cell attachment.
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Affiliation(s)
- Kateryna Bazaka
- Electronic Materials Research Lab, School of Engineering and Physical Sciences, James Cook University, Townsville, Queensland, Australia
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20
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Physico-mechanical characterisation of cells using atomic force microscopy — Current research and methodologies. J Microbiol Methods 2011; 86:131-9. [DOI: 10.1016/j.mimet.2011.05.021] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 05/18/2011] [Accepted: 05/26/2011] [Indexed: 11/21/2022]
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21
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The influence of nanoscopically thin silver films on bacterial viability and attachment. Appl Microbiol Biotechnol 2011; 91:1149-57. [DOI: 10.1007/s00253-011-3195-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 02/23/2011] [Accepted: 02/24/2011] [Indexed: 10/18/2022]
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22
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Bazaka K, Jacob MV, Crawford RJ, Ivanova EP. Plasma-assisted surface modification of organic biopolymers to prevent bacterial attachment. Acta Biomater 2011; 7:2015-28. [PMID: 21194574 DOI: 10.1016/j.actbio.2010.12.024] [Citation(s) in RCA: 220] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 12/01/2010] [Accepted: 12/20/2010] [Indexed: 12/30/2022]
Abstract
Despite many synthetic biomaterials having physical properties that are comparable or even superior to those of natural body tissues, they frequently fail due to the adverse physiological reactions they cause within the human body, such as infection and inflammation. The surface modification of biomaterials is an economical and effective method by which biocompatibility and biofunctionality can be achieved while preserving the favorable bulk characteristics of the biomaterial, such as strength and inertness. Amongst the numerous surface modification techniques available, plasma surface modification affords device manufacturers a flexible and environmentally friendly process that enables tailoring of the surface morphology, structure, composition, and properties of the material to a specific need. There are a vast range of possible applications of plasma modification in biomaterial applications, however, the focus of this review paper is on processes that can be used to develop surface morphologies and chemical structures for the prevention of adhesion and proliferation of pathogenic bacteria on the surfaces of in-dwelling medical devices. As such, the fundamental principles of bacterial cell attachment and biofilm formation are also discussed. Functional organic plasma polymerised coatings are also discussed for their potential as biosensitive interfaces, connecting inorganic/metallic electronic devices with their physiological environments.
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Affiliation(s)
- Kateryna Bazaka
- Electronic Materials Research Laboratory, School of Engineering and Physical Sciences, James Cook University, Townsville, Queensland, Australia
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23
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Lorite GS, Rodrigues CM, de Souza AA, Kranz C, Mizaikoff B, Cotta MA. The role of conditioning film formation and surface chemical changes on Xylella fastidiosa adhesion and biofilm evolution. J Colloid Interface Sci 2011; 359:289-95. [PMID: 21486669 DOI: 10.1016/j.jcis.2011.03.066] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Revised: 03/17/2011] [Accepted: 03/18/2011] [Indexed: 10/18/2022]
Abstract
Biofilms are complex microbial communities with important biological functions including enhanced resistance against external factors like antimicrobial agents. The formation of a biofilm is known to be strongly dependent on substrate properties including hydrophobicity/hydrophilicity, structure, and roughness. The adsorption of (macro)molecules on the substrate, also known as conditioning film, changes the physicochemical properties of the surface and affects the bacterial adhesion. In this study, we investigate the physicochemical changes caused by Periwinkle wilt (PW) culture medium conditioning film formation on different surfaces (glass and silicon) and their effect on X. fastidiosa biofilm formation. Contact angle measurements have shown that the film formation decreases the surface hydrophilicity degree of both glass and silicon after few hours. Atomic force microscopy (AFM) images show the glass surface roughness is drastically reduced with conditioning film formation. First-layer X. fastidiosa biofilm on glass was observed in the AFM liquid cell after a period of time similar to that determined for the hydrophilicity changes. In addition, attenuation total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy supports the AFM observation, since the PW absorption spectra increases with time showing a stronger contribution from the phosphate groups. Although hydrophobic and rough surfaces are commonly considered to increase bacteria cell attachment, our results suggest that these properties are not as important as the surface functional groups resulting from PW conditioning film formation for X. fastidiosa adhesion and biofilm development.
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Affiliation(s)
- Gabriela S Lorite
- Departamento de Física Aplicada, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, SP, Brazil.
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The Effect of Polyterpenol Thin Film Surfaces on Bacterial Viability and Adhesion. Polymers (Basel) 2011. [DOI: 10.3390/polym3010388] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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25
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Mitik-Dineva N, Wang J, Truong VK, Stoddart PR, Alexander MR, Albutt DJ, Fluke C, Crawford RJ, Ivanova EP. Bacterial attachment on optical fibre surfaces. BIOFOULING 2010; 26:461-471. [PMID: 20358429 DOI: 10.1080/08927011003753399] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Optical fibres have received considerable attention as high-density sensor arrays suitable for both in vitro and in vivo measurements of biomolecules and biological processes in living organisms and/or nano-environments. The fibre surface was chemically modified by exposure to a selective etchant that preferentially erodes the fibre cores relative to the surrounding cladding material, thus producing a regular pattern of cylindrical wells of approximately 2.5 mum in diameter and 2.5 mum deep. The surface hydrophobicity of the etched and non-etched optical fibres was analysed using the sessile pico-drop method. The surface topography was characterised by atomic force microscopy (AFM), while the surface chemistry was probed by time-of-flight secondary ion mass spectrometry (ToF-SIMS). Six taxonomically different bacterial strains showed a consistent preference for attachment to the nano-scale smoother (R(q) = 273 nm), non-etched fibre surfaces (water contact angle, theta = 106 degrees +/- 4 degrees). In comparison, the surfaces of the etched optical fibres (water contact angle, theta = 96 degrees +/- 10 degrees) were not found to be amenable to bacterial attachment. Bacterial attachment on the non-etched optical fibre substrata varied among different strains.
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Affiliation(s)
- N Mitik-Dineva
- Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn, Victoria, Australia
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26
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Ivanova EP, Truong VK, Wang JY, Berndt CC, Jones RT, Yusuf II, Peake I, Schmidt HW, Fluke C, Barnes D, Crawford RJ. Impact of nanoscale roughness of titanium thin film surfaces on bacterial retention. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1973-82. [PMID: 19842625 DOI: 10.1021/la902623c] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Two human pathogenic bacteria, Staphylococcus aureus CIP 68.5 and Pseudomonas aeruginosa ATCC 9025, were adsorbed onto surfaces containing Ti thin films of varying thickness to determine the extent to which nanoscale surface roughness influences the extent of bacterial attachment. A magnetron sputter thin film system was used to deposit titanium films with thicknesses of 3, 12, and 150 nm on glass substrata with corresponding surface roughness parameters of R(q) 1.6, 1.2, and 0.7 nm (on a 4 microm x 4 microm scanning area). The chemical composition, wettability, and surface architecture of titanium thin films were characterized using X-ray photoelectron spectroscopy, contact angle measurements, atomic force microscopy, three-dimensional interactive visualization, and statistical approximation of the topographic profiles. Investigation of the dynamic evolution of the Ti thin film topographic parameters indicated that three commonly used parameters, R(a), R(q), and R(max), were insufficient to effectively characterize the nanoscale rough/smooth surfaces. Two additional parameters, R(skw) and R(kur), which describe the statistical distributions of roughness character, were found to be useful for evaluating the surface architecture. Analysis of bacterial retention profiles indicated that bacteria responded differently to the surfaces on a scale of less than 1 nm change in the R(a) and R(q) Ti thin film surface roughness parameters by (i) an increased number of retained cells by a factor of 2-3, and (ii) an elevated level of secretion of extracellular polymeric substances.
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Affiliation(s)
- Elena P Ivanova
- Faculty Life and Social Sciences, IRIS, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria, 3122, Australia.
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27
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Truong VK, Rundell S, Lapovok R, Estrin Y, Wang JY, Berndt CC, Barnes DG, Fluke CJ, Crawford RJ, Ivanova EP. Effect of ultrafine-grained titanium surfaces on adhesion of bacteria. Appl Microbiol Biotechnol 2009; 83:925-37. [DOI: 10.1007/s00253-009-1944-5] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Revised: 03/03/2009] [Accepted: 03/03/2009] [Indexed: 11/28/2022]
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28
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Webb HK, Crawford RJ, Sawabe T, Ivanova EP. Poly(ethylene terephthalate) Polymer Surfaces as a Substrate for Bacterial Attachment and Biofilm Formation. Microbes Environ 2009; 24:39-42. [DOI: 10.1264/jsme2.me08538] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Hayden K. Webb
- Swinburne University of Technology, Faculty of Life and Social Sciences
| | | | - Tomoo Sawabe
- Laboratory of Microbiology, Faculty of Fisheries Sciences, Hokkaido University
| | - Elena P. Ivanova
- Swinburne University of Technology, Faculty of Life and Social Sciences
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