1
|
Le Guern F, Ouk TS, Arnoux P, Frochot C, Sol V. Easy and versatile cellulosic support inhibiting broad spectrum strains: synergy between photodynamic antimicrobial therapy and polymyxin B. Photochem Photobiol Sci 2024; 23:395-407. [PMID: 38300464 DOI: 10.1007/s43630-023-00526-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/15/2023] [Indexed: 02/02/2024]
Abstract
Despite advances achieved in the health field over the last decade, infections caused by resistant bacterial strains are an increasingly important societal issue that needs to be addressed. New approaches have already been developed to overcome this problem. Photodynamic antimicrobial chemotherapy (PACT) could provide a promising alternative method to eradicate microbes. This approach has already inspired the development of innovative surfaces. Interesting results were achieved against Gram-positive bacteria, but it also appeared that Gram-negative strains, especially Pseudomonas aeruginosa, were less sensitive to PACT. However, materials coated with cationic porphyrins have already proven their wide-spectrum activity, but these materials were not suitable for industrial-scale production. The main aim of this work was the design of a large-scale evolutionary material based on PACT and antibiotic prophylaxis. Transparent regenerated cellulose has been simply impregnated with a usual cationic porphyrin (N-methylpyridyl) and an antimicrobial peptide (polymyxin B). In addition to its photophysical properties, this film exhibited a wide-spectrum bactericidal activity over 4 days despite daily application of fresh bacterial inoculums. The efficiency of PACT and polymyxin B combination could help to reduce the emergence of bacterial multi-resistant strains and we believe that this kind of material would provide an excellent opportunity to prevent bacterial contamination of bandages or packaging.
Collapse
Affiliation(s)
- Florent Le Guern
- Univ Limoges, LABCiS, UR22722, 87000, Limoges, France
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, 78000, Versailles, France
| | | | - Phillipe Arnoux
- Université de Lorraine, CNRS LRGP UMR 7274, 54000, Nancy, France
| | - Céline Frochot
- Université de Lorraine, CNRS LRGP UMR 7274, 54000, Nancy, France
| | - Vincent Sol
- Univ Limoges, LABCiS, UR22722, 87000, Limoges, France.
| |
Collapse
|
2
|
Tavakkoli Yaraki M, Liu B, Tan YN. Emerging Strategies in Enhancing Singlet Oxygen Generation of Nano-Photosensitizers Toward Advanced Phototherapy. NANO-MICRO LETTERS 2022; 14:123. [PMID: 35513555 PMCID: PMC9072609 DOI: 10.1007/s40820-022-00856-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/21/2022] [Indexed: 05/06/2023]
Abstract
The great promise of photodynamic therapy (PDT) has thrusted the rapid progress of developing highly effective photosensitizers (PS) in killing cancerous cells and bacteria. To mitigate the intrinsic limitations of the classical molecular photosensitizers, researchers have been looking into designing new generation of nanomaterial-based photosensitizers (nano-photosensitizers) with better photostability and higher singlet oxygen generation (SOG) efficiency, and ways of enhancing the performance of existing photosensitizers. In this paper, we review the recent development of nano-photosensitizers and nanoplasmonic strategies to enhance the SOG efficiency for better PDT performance. Firstly, we explain the mechanism of reactive oxygen species generation by classical photosensitizers, followed by a brief discussion on the commercially available photosensitizers and their limitations in PDT. We then introduce three types of new generation nano-photosensitizers that can effectively produce singlet oxygen molecules under visible light illumination, i.e., aggregation-induced emission nanodots, metal nanoclusters (< 2 nm), and carbon dots. Different design approaches to synthesize these nano-photosensitizers were also discussed. To further enhance the SOG rate of nano-photosensitizers, plasmonic strategies on using different types of metal nanoparticles in both colloidal and planar metal-PS systems are reviewed. The key parameters that determine the metal-enhanced SOG (ME-SOG) efficiency and their underlined enhancement mechanism are discussed. Lastly, we highlight the future prospects of these nanoengineering strategies, and discuss how the future development in nanobiotechnology and theoretical simulation could accelerate the design of new photosensitizers and ME-SOG systems for highly effective image-guided photodynamic therapy.
Collapse
Affiliation(s)
- Mohammad Tavakkoli Yaraki
- Institute of Materials Research and Engineering, The Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03, Innovis, 138634, Singapore
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore.
| | - Yen Nee Tan
- Institute of Materials Research and Engineering, The Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03, Innovis, 138634, Singapore.
- Faculty of Science, Agriculture and Engineering, Newcastle University, Newcastle Upon Tyne, NE1 7RU, UK.
- Newcastle Research and Innovation Institute, Newcastle University in Singapore, 80 Jurong East Street 21, #05-04, Singapore, 609607, Singapore.
| |
Collapse
|
3
|
Versace DL, Breloy L, Palierse E, Coradin T. Contributions of photochemistry to bio-based antibacterial polymer materials. J Mater Chem B 2021; 9:9624-9641. [PMID: 34807217 DOI: 10.1039/d1tb01801a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Surgical site infections constitute a major health concern that may be addressed by conferring antibacterial properties to surgical tools and medical devices via functional coatings. Bio-sourced polymers are particularly well-suited to prepare such coatings as they are usually safe and can exhibit intrinsic antibacterial properties or serve as hosts for bactericidal agents. The goal of this Review is to highlight the unique contribution of photochemistry as a green and mild methodology for the development of such bio-based antibacterial materials. Photo-generation and photo-activation of bactericidal materials are illustrated. Recent efforts and current challenges to optimize the sustainability of the process, improve the safety of the materials and extend these strategies to 3D biomaterials are also emphasized.
Collapse
Affiliation(s)
- Davy-Louis Versace
- Institut de Chimie et des Matériaux Paris-Est (ICMPE, UMR-CNRS 7182), 2-8 rue Henri Dunant, 94320 Thiais, France.
| | - Louise Breloy
- Institut de Chimie et des Matériaux Paris-Est (ICMPE, UMR-CNRS 7182), 2-8 rue Henri Dunant, 94320 Thiais, France.
| | - Estelle Palierse
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR 7574, 4 place Jussieu, 75005 Paris, France. .,Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface (LRS), UMR 7197, 4 place Jussieu, 75005 Paris, France
| | - Thibaud Coradin
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR 7574, 4 place Jussieu, 75005 Paris, France.
| |
Collapse
|
4
|
Lim DJ. Methylene Blue-Based Nano and Microparticles: Fabrication and Applications in Photodynamic Therapy. Polymers (Basel) 2021; 13:3955. [PMID: 34833254 PMCID: PMC8618133 DOI: 10.3390/polym13223955] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 12/13/2022] Open
Abstract
Methylene blue (MB) has been used in the textile industry since it was first extracted by the German chemist Heinrich Caro. Its pharmacological properties have also been applied toward the treatment of certain diseases such as methemoglobinemia, ifosfamide-induced encephalopathy, and thyroid conditions requiring surgery. Recently, the utilization of MB as a safe photosensitizer in photodynamic therapy (PDT) has received attention. Recent findings demonstrate that photoactivated MB exhibits not only anticancer activity but also antibacterial activity both in vitro and in vivo. However, due to the hydrophilic nature of MB, it is difficult to create MB-embedded nano- or microparticles capable of increasing the clinical efficacy of the PDT. This review aims to summarize fabrication techniques for MB-embedded nano and microparticles and to provide both in vitro and in vivo examples of MB-mediated PDT, thereby offering a future perspective on improving this promising clinical treatment modality. We also address examples of MB-mediated PDT in both cancer and infection treatments. Both in-vitro and in-vivo studies are summarized here to document recent trends in utilizing MB as an effective photosensitizer in PDT. Lastly, we discuss how developing efficient MB-carrying nano- and microparticle platforms would be able to increase the benefits of PDT.
Collapse
Affiliation(s)
- Dong-Jin Lim
- Department of Otolaryngology Head & Neck Surgery, University of Alabama at Birmingham, Birmingham, AL 35294-0012, USA
| |
Collapse
|
5
|
Mobed A, Hasanzadeh M, Seidi F. Anti-bacterial activity of gold nanocomposites as a new nanomaterial weapon to combat photogenic agents: recent advances and challenges. RSC Adv 2021; 11:34688-34698. [PMID: 35494766 PMCID: PMC9042813 DOI: 10.1039/d1ra06030a] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 10/17/2021] [Indexed: 12/20/2022] Open
Abstract
Gold nanocomposites are being widely used in numerous biomedical applications owing to their excellent stability and miniaturization. Gold nanocomposites are notable because of their flexibility of functionalization and synthesis, ease of detection, and low toxicity. Cost-effectiveness, long-term stability, non-cytotoxicity, and biocompatibility are the main aspects of ideal nanocomposites. Antibacterial nanocomposites are being developed extensively in the food industry, environmental applications, and biological and medical devices. This review focuses on the applications of metal-based nanoparticles, mainly gold nanoparticles (AuNPs), as antibacterial agents in medical approaches. Additionally, the antibacterial mechanisms of AuNPs and their roles in fighting antibiotic-resistant microorganisms are highlighted in the present review. Gold nanocomposites are being widely used in numerous biomedical applications owing to their excellent stability and miniaturization.![]()
Collapse
Affiliation(s)
- Ahmad Mobed
- Aging Research Institute, Faculty of Medicine, Tabriz University of Medical Sciences, Iran
- Physical Medicine and Rehabilitation Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Pharmaceutical Analysis Recent Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Hasanzadeh
- Pharmaceutical Analysis Recent Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farzad Seidi
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| |
Collapse
|
6
|
Thamilvanan D, Jeevanandam J, Hii YS, Chan YS. Sol‐gel coupled ultrasound synthesis of photo‐activated magnesium oxide nanoparticles: Optimization and antibacterial studies. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Jaison Jeevanandam
- Department of Chemical Engineering Curtin University Malaysia Miri Malaysia
| | - Yiik S. Hii
- Department of Chemical Engineering Curtin University Malaysia Miri Malaysia
| | - Yen S. Chan
- Department of Chemical Engineering Curtin University Malaysia Miri Malaysia
| |
Collapse
|
7
|
Sehmi SK, Lourenco C, Alkhuder K, Pike SD, Noimark S, Williams CK, Shaffer MSP, Parkin IP, MacRobert AJ, Allan E. Antibacterial Surfaces with Activity against Antimicrobial Resistant Bacterial Pathogens and Endospores. ACS Infect Dis 2020; 6:939-946. [PMID: 32126763 DOI: 10.1021/acsinfecdis.9b00279] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Hospital-acquired bacterial infections are a significant burden on healthcare systems worldwide causing an increased duration of hospital stays and prolonged patient suffering. We show that polyurethane containing crystal violet (CV) and 3-4 nm zinc oxide nanoparticles (ZnO NPs) possesses excellent bactericidal activity against hospital-acquired pathogens including multidrug resistant Escherichia coli (E. coli), Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus (MRSA), and even highly resistant endospores of Clostridioides (Clostridium) difficile. Importantly, we used clinical isolates of bacterial strains, a protocol to mimic the environmental conditions of a real exposure in the healthcare setting, and low light intensity equivalent to that encountered in UK hospitals (∼500 lux). Our data shows that ZnO NPs enhance the photobactericidal activity of CV under low intensity light even with short exposure times, and we show that this involves both Type I and Type II photochemical pathways. Interestingly, polyurethane containing ZnO NPs alone showed significant bactericidal activity in the dark against one strain of E. coli, indicating that the NPs possess both light-activated synergistic activity with CV and inherent bactericidal activity that is independent of light. These new antibacterial polymers are potentially useful in healthcare facilties to reduce the transmission of pathogens between people and the environment.
Collapse
Affiliation(s)
- Sandeep K. Sehmi
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Claudio Lourenco
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Khaled Alkhuder
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
| | - Sebastian D. Pike
- Department of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, United Kingdom
| | - Sacha Noimark
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Charlotte K. Williams
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Milo S. P. Shaffer
- Department of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, United Kingdom
| | - Ivan P. Parkin
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Alexander J. MacRobert
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Elaine Allan
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
| |
Collapse
|
8
|
Hydrogels Loaded with Methylene Blue: Sorption-Desorption and Antimicrobial Photoactivation Study. INT J POLYM SCI 2020. [DOI: 10.1155/2020/9875290] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cross-linked dextran-graft-polyacrylamide hydrogels with different cross-linking density loaded with methylene blue was prepared as light-activated antimicrobial materials. Sorption/desorption properties of hydrogels were studied by estimating the change in the absorption maximum of MB solutions. The sorption/desorption rate of MB into/out of hydrogel depends on the hydrogel structure. The antibacterial properties of the light-irradiated materials were tested against Staphylococcus aureus. It was shown that irradiation of hydrogels in the presence of methylene blue was able to eliminate the bacteria strains.
Collapse
|
9
|
Rossi F, Khoo EH, Su X, Thanh NTK. Study of the Effect of Anisotropic Gold Nanoparticles on Plasmonic Coupling with a Photosensitizer for Antimicrobial Film. ACS APPLIED BIO MATERIALS 2019; 3:315-326. [DOI: 10.1021/acsabm.9b00838] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Francesco Rossi
- Biophysics Group, Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories, 21 Albermarle Street, London W1S 4BS, U.K
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #8-03, Singapore 138634
| | - Eng Huat Khoo
- Institute of High Performance Computing, Electronics and Photonics Department, 1 Fusionopolis Way, Connexis North, #16-16, Singapore 138632
| | - Xiaodi Su
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #8-03, Singapore 138634
- Department of Chemistry, National University of Singapore, Block S8, Level 3, 3 Science Drive 3, Singapore 117543
- School of Engineering and Science, University of the Sunshine Coast, 90 Sippy Downs Drive, Sippy Downs QLD 4556, Australia
| | - Nguyen Thi Kim Thanh
- Biophysics Group, Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, U.K
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories, 21 Albermarle Street, London W1S 4BS, U.K
| |
Collapse
|
10
|
Maliszewska I, Wróbel J, Wanarska E, Podhorodecki A, Matczyszyn K. Synergistic effect of methylene blue and biogenic gold nanoparticles against Enterococcus faecalis. Photodiagnosis Photodyn Ther 2019; 27:218-226. [DOI: 10.1016/j.pdpdt.2019.05.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/26/2019] [Accepted: 05/31/2019] [Indexed: 12/20/2022]
|
11
|
Q Mesquita M, J Dias C, P M S Neves MG, Almeida A, F Faustino MA. Revisiting Current Photoactive Materials for Antimicrobial Photodynamic Therapy. Molecules 2018; 23:E2424. [PMID: 30248888 PMCID: PMC6222430 DOI: 10.3390/molecules23102424] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/14/2018] [Accepted: 09/18/2018] [Indexed: 12/22/2022] Open
Abstract
Microbial infection is a severe concern, requiring the use of significant amounts of antimicrobials/biocides, not only in the hospital setting, but also in other environments. The increasing use of antimicrobial drugs and the rapid adaptability of microorganisms to these agents, have contributed to a sharp increase of antimicrobial resistance. It is obvious that the development of new strategies to combat planktonic and biofilm-embedded microorganisms is required. Photodynamic inactivation (PDI) is being recognized as an effective method to inactivate a broad spectrum of microorganisms, including those resistant to conventional antimicrobials. In the last few years, the development and biological assessment of new photosensitizers for PDI were accompanied by their immobilization in different supports having in mind the extension of the photodynamic principle to new applications, such as the disinfection of blood, water, and surfaces. In this review, we intended to cover a significant amount of recent work considering a diversity of photosensitizers and supports to achieve an effective photoinactivation. Special attention is devoted to the chemistry behind the preparation of the photomaterials by recurring to extensive examples, illustrating the design strategies. Additionally, we highlighted the biological challenges of each formulation expecting that the compiled information could motivate the development of other effective photoactive materials.
Collapse
Affiliation(s)
- Mariana Q Mesquita
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
- Department of Biomedical Sciences and iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Cristina J Dias
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Maria G P M S Neves
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Adelaide Almeida
- Department of Biology CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - M Amparo F Faustino
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| |
Collapse
|
12
|
Aluminum plasmonic nanoshielding in ultraviolet inactivation of bacteria. Sci Rep 2017; 7:9026. [PMID: 28831133 PMCID: PMC5567371 DOI: 10.1038/s41598-017-08593-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 07/04/2017] [Indexed: 01/27/2023] Open
Abstract
Ultraviolet (UV) irradiation is an effective bacterial inactivation technique with broad applications in environmental disinfection. However, biomedical applications are limited due to the low selectivity, undesired inactivation of beneficial bacteria and damage of healthy tissue. New approaches are needed for the protection of biological cells from UV radiation for the development of controlled treatment and improved biosensors. Aluminum plasmonics offers attractive opportunities for the control of light-matter interactions in the UV range, which have not yet been explored in microbiology. Here, we investigate the effects of aluminum nanoparticles (Al NPs) prepared by sonication of aluminum foil on the UVC inactivation of E. coli bacteria and demonstrate a new radiation protection mechanism via plasmonic nanoshielding. We observe direct interaction of the bacterial cells with Al NPs and elucidate the nanoshielding mechanism via UV plasmonic resonance and nanotailing effects. Concentration and wavelength dependence studies reveal the role and range of control parameters for regulating the radiation dosage to achieve effective UVC protection. Our results provide a step towards developing improved radiation-based bacterial treatments.
Collapse
|
13
|
Kottmann A, Mejía E, Hémery T, Klein J, Kragl U. Recent Developments in the Preparation of Silicones with Antimicrobial Properties. Chem Asian J 2017; 12:1168-1179. [PMID: 28393471 DOI: 10.1002/asia.201700244] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/10/2017] [Indexed: 01/24/2023]
Abstract
This Focus Review describes state-of-the-art methods for the preparation of antimicrobial silicones. Given the diversity of antimicrobial activity and their mechanisms, the performance of these materials is highly dependent on the characteristics of the polymeric matrix. Therefore, different synthetic routes have been developed, such as 1) physical treatments, 2) chemical transformations, and 3) copolymerization. This classification is not exclusive, so some products belong to more than one class. Herein, we attempt to present a handy overview of the development of antimicrobial silicones, their most important application fields, the most relevant antimicrobial assays, and, as the title suggests, an overview of the most relevant preparation methods.
Collapse
Affiliation(s)
- Annika Kottmann
- Leibniz Institute for Catalysis, Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Esteban Mejía
- Leibniz Institute for Catalysis, Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Thérèse Hémery
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589, Düsseldorf, Germany
| | - Johann Klein
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589, Düsseldorf, Germany
| | - Udo Kragl
- Leibniz Institute for Catalysis, Albert-Einstein-Straße 29a, 18059, Rostock, Germany.,University of Rostock, Institute of Chemistry, Albert-Einstein-Str. 3a, 18059, Rostock, Germany
| |
Collapse
|
14
|
Maliszewska I, Lisiak B, Popko K, Matczyszyn K. Enhancement of the Efficacy of Photodynamic Inactivation of Candida albicans with the Use of Biogenic Gold Nanoparticles. Photochem Photobiol 2017; 93:1081-1090. [PMID: 28191638 DOI: 10.1111/php.12733] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 12/09/2016] [Indexed: 12/12/2022]
Abstract
This study reports on successful photodynamic inactivation of planktonic and biofilm cells of Candida albicans using Rose Bengal (RB) in combination with biogenic gold nanoparticles synthesized by the cell-free filtrate of Penicillium funiculosum BL1 strain. Monodispersed colloidal gold nanoparticles coated with proteins were characterized by a number of techniques including SEM-EDS, TEM, UV-Vis absorption and fluorescence spectroscopy, as well as Fourier transform infrared spectroscopy to be 24 ± 3 nm spheres. A Xe lamp (output power of 20mW, delivering intensity of 53 mW cm-2 ) was used as a light source to study the effects of RB alone, the gold nanoparticles alone and the RB-gold nanoparticle mixture on the viability of C. albicans cells. The most effective reduction in the number of planktonic cells was found after 30 min of Xe lamp light irradiation (95.4 J cm-2 ) and was 4.89 log10 that is 99.99% kill for the mixture of RB with gold nanoparticles compared with 2.19 log10 or 99.37% for RB alone. The biofilm cells were more resistant to photodynamic inactivation, and the highest effective reduction in the number of cells was found after 30 min of irradiation in the presence of the RB-gold nanoparticles mixture and was 1.53 log10 , that is 97.04% kill compared with 0.6 log10 or 74.73% for RB. The probable mechanism of enhancement of RB-mediated photodynamic fungicidal efficacy against C. albicans in the presence of biogenic gold nanoparticles is discussed leading to the conclusion that this process may have a multifaceted character.
Collapse
Affiliation(s)
- Irena Maliszewska
- Division of Medicinal Chemistry and Microbiology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Barbara Lisiak
- Division of Medicinal Chemistry and Microbiology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Katarzyna Popko
- Division of Medicinal Chemistry and Microbiology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Katarzyna Matczyszyn
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland
| |
Collapse
|
15
|
Macdonald TJ, Wu K, Sehmi SK, Noimark S, Peveler WJ, du Toit H, Voelcker NH, Allan E, MacRobert AJ, Gavriilidis A, Parkin IP. Thiol-Capped Gold Nanoparticles Swell-Encapsulated into Polyurethane as Powerful Antibacterial Surfaces Under Dark and Light Conditions. Sci Rep 2016; 6:39272. [PMID: 27982122 PMCID: PMC5159832 DOI: 10.1038/srep39272] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 11/14/2016] [Indexed: 12/20/2022] Open
Abstract
A simple procedure to develop antibacterial surfaces using thiol-capped gold nanoparticles (AuNPs) is shown, which effectively kill bacteria under dark and light conditions. The effect of AuNP size and concentration on photo-activated antibacterial surfaces is reported and we show significant size effects, as well as bactericidal activity with crystal violet (CV) coated polyurethane. These materials have been proven to be powerful antibacterial surfaces against both Gram-positive and Gram-negative bacteria. AuNPs of 2, 3 or 5 nm diameter were swell-encapsulated into PU before a coating of CV was applied (known as PU-AuNPs-CV). The antibacterial activity of PU-AuNPs-CV samples was tested against Staphylococcus aureus and Escherichia coli as representative Gram-positive and Gram-negative bacteria under dark and light conditions. All light conditions in this study simulated a typical white-light hospital environment. This work demonstrates that the antibacterial activity of PU-AuNPs-CV samples and the synergistic enhancement of photoactivity of triarylmethane type dyes is highly dependent on nanoparticle size and concentration. The most powerful PU-AuNPs-CV antibacterial surfaces were achieved using 1.0 mg mL-1 swell encapsulation concentrations of 2 nm AuNPs. After two hours, Gram-positive and Gram-negative bacteria were reduced to below the detection limit (>4 log) under dark and light conditions.
Collapse
Affiliation(s)
- Thomas J. Macdonald
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Ke Wu
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Sandeep K. Sehmi
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Sacha Noimark
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - William J. Peveler
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| | - Hendrik du Toit
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom
| | - Nicolas H. Voelcker
- ARC Centre of Excellence for Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia, Mawson Lakes, 5095, Australia
| | - Elaine Allan
- Division of Microbial Diseases, UCL Eastman Dental Institute, University College London, 256 Grays Inn Road, London, WC1X 8LD, United Kingdom
| | - Alexander J. MacRobert
- UCL Division of Surgery and Interventional Science, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, United Kingdom
| | - Asterios Gavriilidis
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom
| | - Ivan P. Parkin
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, United Kingdom
| |
Collapse
|
16
|
Perni S, Drexler S, Ruppel S, Prokopovich P. Lethal photosensitisation of bacteria using silica-TBO nanoconjugates. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.06.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
17
|
Sehmi SK, Allan E, MacRobert AJ, Parkin I. The bactericidal activity of glutaraldehyde-impregnated polyurethane. Microbiologyopen 2016; 5:891-897. [PMID: 27255793 PMCID: PMC5061724 DOI: 10.1002/mbo3.378] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 03/21/2016] [Accepted: 03/30/2016] [Indexed: 11/14/2022] Open
Abstract
Although glutaraldehyde is known to be bactericidal in solution, its potential use to create novel antibacterial polymers suitable for use in healthcare environments has not been evaluated. Here, novel materials were prepared in which glutaraldehyde was either incorporated into polyurethane using a simple "swell-encapsulation-shrink" method (hereafter referred to as "glutaraldehyde-impregnated polyurethane"), or simply applied to the polymer surface (hereafter referred to as "glutaraldehyde-coated polyurethane"). The antibacterial activity of glutaraldehyde-impregnated and glutaraldehyde-coated polyurethane samples was tested against Escherichia coli and Staphylococcus aureus. Glutaraldehyde-impregnated polyurethane resulted in a 99.9% reduction in the numbers of E. coli within 2 h and a similar reduction of S. aureus within 1 h, whereas only a minimal reduction in bacterial numbers was observed when the biocide was bound to the polymer surface. After 15 days, however, the bactericidal activity of the impregnated material was substantially reduced presumably due to polymerization of glutaraldehyde. Thus, although glutaraldehyde retains antibacterial activity when impregnated into polyurethane, activity is not maintained for extended periods of time. Future work should examine the potential of chemical modification of glutaraldehyde and/or polyurethane to improve the useful lifespan of this novel antibacterial polymer.
Collapse
Affiliation(s)
- Sandeep K Sehmi
- Department of Chemistry, Materials Chemistry Research Centre, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, United Kingdom
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray's Inn Road, London, WC1X 8LD, United Kingdom
| | - Elaine Allan
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray's Inn Road, London, WC1X 8LD, United Kingdom
| | - Alexander J MacRobert
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, United Kingdom
| | - Ivan Parkin
- Department of Chemistry, Materials Chemistry Research Centre, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom.
| |
Collapse
|
18
|
Sehmi S, Noimark S, Pike S, Bear JC, Peveler WJ, Williams CK, Shaffer MSP, Allan E, Parkin IP, MacRobert AJ. Enhancing the Antibacterial Activity of Light-Activated Surfaces Containing Crystal Violet and ZnO Nanoparticles: Investigation of Nanoparticle Size, Capping Ligand, and Dopants. ACS OMEGA 2016; 1:334-343. [PMID: 27840856 PMCID: PMC5098237 DOI: 10.1021/acsomega.6b00017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/23/2016] [Indexed: 05/19/2023]
Abstract
Healthcare-associated infections pose a serious risk for patients, staff, and visitors and are a severe burden on the National Health Service, costing at least £1 billion annually. Antimicrobial surfaces significantly contribute toward reducing the incidence of infections as they prevent bacterial adhesion and cause bacterial cell death. Using a simple, easily upscalable swell-encapsulation-shrink method, novel antimicrobial surfaces have been developed by incorporating metal oxide nanoparticles (NPs) and crystal violet (CV) dye into medical-grade polyurethane sheets. This study compares the bactericidal effects of polyurethane incorporating ZnO, Mg-doped ZnO, and MgO. All metal oxide NPs are well defined, with average diameters ranging from 2 to 18 nm. These materials demonstrate potent bactericidal activity when tested against clinically relevant bacteria such as Escherichia coli and Staphylococcus aureus. Additionally, these composites are tested against an epidemic strain of methicillin-resistant Staphylococcus aureus (MRSA) that is rife in hospitals throughout the UK. Furthermore, we have tested these materials using a low light intensity (∼500 lx), similar to that present in many clinical environments. The highest activity is achieved from polymer composites incorporating CV and ∼3 nm ZnO NPs, and the different performances of the metal oxides have been discussed.
Collapse
Affiliation(s)
- Sandeep
K. Sehmi
- UCL
Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, U.K.
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Division
of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, U.K.
| | - Sacha Noimark
- Department
of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E
6BT, U.K.
| | - Sebastian
D. Pike
- Department
of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, U.K.
| | - Joseph C. Bear
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - William J. Peveler
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Charlotte K. Williams
- Department
of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, U.K.
| | - Milo S. P. Shaffer
- Department
of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, U.K.
| | - Elaine Allan
- Division
of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, U.K.
| | - Ivan P. Parkin
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Alexander J. MacRobert
- UCL
Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, U.K.
| |
Collapse
|
19
|
Bucharskaya A, Maslyakova G, Terentyuk G, Yakunin A, Avetisyan Y, Bibikova O, Tuchina E, Khlebtsov B, Khlebtsov N, Tuchin V. Towards Effective Photothermal/Photodynamic Treatment Using Plasmonic Gold Nanoparticles. Int J Mol Sci 2016; 17:E1295. [PMID: 27517913 PMCID: PMC5000692 DOI: 10.3390/ijms17081295] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 07/22/2016] [Accepted: 07/29/2016] [Indexed: 01/24/2023] Open
Abstract
Gold nanoparticles (AuNPs) of different size and shape are widely used as photosensitizers for cancer diagnostics and plasmonic photothermal (PPT)/photodynamic (PDT) therapy, as nanocarriers for drug delivery and laser-mediated pathogen killing, even the underlying mechanisms of treatment effects remain poorly understood. There is a need in analyzing and improving the ways to increase accumulation of AuNP in tumors and other crucial steps in interaction of AuNPs with laser light and tissues. In this review, we summarize our recent theoretical, experimental, and pre-clinical results on light activated interaction of AuNPs with tissues and cells. Specifically, we discuss a combined PPT/PDT treatment of tumors and killing of pathogen bacteria with gold-based nanocomposites and atomic clusters, cell optoporation, and theoretical simulations of nanoparticle-mediated laser heating of tissues and cells.
Collapse
Affiliation(s)
- Alla Bucharskaya
- Research Institute for Fundamental and Clinical Uronephrology, Saratov State Medical University, n.a. V.I. Razumovsky, 410012 Saratov, Russia.
| | - Galina Maslyakova
- Research Institute for Fundamental and Clinical Uronephrology, Saratov State Medical University, n.a. V.I. Razumovsky, 410012 Saratov, Russia.
| | - Georgy Terentyuk
- Research Institute for Fundamental and Clinical Uronephrology, Saratov State Medical University, n.a. V.I. Razumovsky, 410012 Saratov, Russia.
- Research-Education Institute of Optics and Biophotonics, Saratov National Research State University, 410012 Saratov, Russia.
| | - Alexander Yakunin
- Institute of Precision Mechanics and Control, RAS, 410028 Saratov, Russia.
| | - Yuri Avetisyan
- Institute of Precision Mechanics and Control, RAS, 410028 Saratov, Russia.
| | - Olga Bibikova
- Research-Education Institute of Optics and Biophotonics, Saratov National Research State University, 410012 Saratov, Russia.
- Artphotonics GmbH, 12489 Berlin, Germany.
- Optoelectronics and Measurement Techniques Laboratory, University of Oulu, 90014 Oulu, Finland.
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, 89081 Ulm, Germany.
| | - Elena Tuchina
- Department of Biology, Saratov National Research State University, 410012 Saratov, Russia.
| | - Boris Khlebtsov
- Institute of Biochemistry and Physiology of Plants and Microorganisms, RAS, 410049 Saratov, Russia.
- Department of Nano- and Biomedical Technologies, Saratov National Research State University, 410012 Saratov, Russia.
| | - Nikolai Khlebtsov
- Institute of Biochemistry and Physiology of Plants and Microorganisms, RAS, 410049 Saratov, Russia.
- Department of Nano- and Biomedical Technologies, Saratov National Research State University, 410012 Saratov, Russia.
| | - Valery Tuchin
- Research-Education Institute of Optics and Biophotonics, Saratov National Research State University, 410012 Saratov, Russia.
- Institute of Precision Mechanics and Control, RAS, 410028 Saratov, Russia.
- Interdisciplinary Laboratory of Biophotonics, National Research Tomsk State University, 634050 Tomsk, Russia.
| |
Collapse
|
20
|
Madan HR, Sharma SC, Suresh D, Vidya YS, Nagabhushana H, Rajanaik H, Anantharaju KS, Prashantha SC, Sadananda Maiya P. Facile green fabrication of nanostructure ZnO plates, bullets, flower, prismatic tip, closed pine cone: Their antibacterial, antioxidant, photoluminescent and photocatalytic properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 152:404-16. [PMID: 26241826 DOI: 10.1016/j.saa.2015.07.067] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 07/12/2015] [Accepted: 07/13/2015] [Indexed: 05/27/2023]
Abstract
Green synthesis of multifunctional Zinc oxide nanoparticles (NPs) with a variety of morphologies were achieved by low temperature solution combustion route employing neem (Azadirachta indica) extract as fuel. The nanoparticles were characterized by PXRD, FTIR, XPS, Raman and UV-Visible spectroscopic studies. The Morphologies were studied by SEM and TEM analysis. The NPs were subjected for photoluminescence, photocatalytic, antibacterial and antioxidant activity studies. PXRD pattern confirmed the hexagonal wurtzite structure of the product. SEM images indicated the transformation of mushroom like hexagonal disks to bullets, buds, cones, bundles and closed pine cone structured NPs with increase in the concentration of neem extract in reaction mixture. The NPs exhibited prominent green emission due to the presence of intrinsic defect centers. The as-formed bullet shaped ZnO with 4ml of neem extract was found to decolorize Methylene blue (MB) under Sunlight and UV light irradiation. The antibacterial studies indicated that ZnO NPs of concentration 500, 750 and 1000μg resulted in significant antibacterial activity on Klebsiella aerogenes and Staphylococcus aureus but not against Escherichia coli and Pseudomonas aeruginosa in agar well diffusion method. Further, ZnO NPs exhibited significant antioxidant activity against scavenging DPPH free radicals. The current investigation demonstrated green engineering method for the synthesis of multifunctional ZnO NPs with interesting morphologies using neem extract.
Collapse
Affiliation(s)
- H R Madan
- Department of Electronics, Tumkur University, Tumkur 572 103, India
| | - S C Sharma
- Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy layout, Bangalore 560078, Karnataka, India
| | - D Suresh
- Department of Studies & Research in Chemistry, Tumkur University, Tumkur 572 103, India
| | - Y S Vidya
- Department of Physics, Lal Bahadur Shastry Government First Grade College, Bangalore 560 032, India.
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur 572 103, India.
| | - H Rajanaik
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572 103, India
| | - K S Anantharaju
- Department of Chemistry, Dayananda Sagar College of Engineering, Shavige Malleshwara Hills, Kumaraswamy layout, Bangalore 560078, Karnataka, India.
| | - S C Prashantha
- Department of Science, East West Institute of Technology, Bangalore 560 091, India
| | - P Sadananda Maiya
- Dr. P. Sadananda Maiya Center for Food Science Research, 4th Block, Jayanagara, Bangalore 560 011, India
| |
Collapse
|
21
|
Spagnul C, Greenman J, Wainwright M, Kamil Z, Boyle RW. Synthesis, characterization and biological evaluation of a new photoactive hydrogel against Gram-positive and Gram-negative bacteria. J Mater Chem B 2016; 4:1499-1509. [DOI: 10.1039/c5tb02569a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Development of a cheap material active against both Gram-positive and Gram-negative bacteria to be used as a novel water-sterilizing device.
Collapse
Affiliation(s)
- Cinzia Spagnul
- Department of Chemistry
- University of Hull
- East Yorkshire
- UK
| | - John Greenman
- School of Life Sciences
- University of the West of England
- Bristol
- UK
| | - Mark Wainwright
- School of Pharmacy and Biomolecular Sciences
- Liverpool John Moores University
- Liverpool
- UK
| | - Zeeniya Kamil
- School of Life Sciences
- University of the West of England
- Bristol
- UK
| | - Ross W. Boyle
- Department of Chemistry
- University of Hull
- East Yorkshire
- UK
| |
Collapse
|
22
|
Han L, Chen Y, Niu J, Peng L, Mao Z, Gao C. Encapsulation of a photosensitizer into cell membrane capsules for photodynamic therapy. RSC Adv 2016. [DOI: 10.1039/c6ra07480d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
CMCs were used to encapsulate MB (CMCs@MB) using temporary permeation of the plasma membrane and resealing. Encapsulation in the CMCs leads to sustained release of MB with enhanced stability against enzymatic reduction and reduced toxicity.
Collapse
Affiliation(s)
- Lijie Han
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ying Chen
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Jie Niu
- Institute of Pharmaceutics
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou
- P.R. China
| | - Lihua Peng
- Institute of Pharmaceutics
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou
- P.R. China
| | - Zhengwei Mao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| |
Collapse
|
23
|
Alotaibi AM, Sathasivam S, Nair SP, Parkin IP. Antibacterial properties of Cu–ZrO2thin films prepared via aerosol assisted chemical vapour deposition. J Mater Chem B 2016; 4:666-671. [DOI: 10.1039/c5tb02312b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The antibacterial properties of a Cu–ZrO2film grownviaaerosol assisted chemical vapour deposition are presented.
Collapse
Affiliation(s)
- Abdullah M. Alotaibi
- Materials Chemistry Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Sanjayan Sathasivam
- Materials Chemistry Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Sean P. Nair
- Department of Microbial Diseases
- University College London Eastman Dental Institute
- London
- UK
| | - Ivan P. Parkin
- Materials Chemistry Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| |
Collapse
|
24
|
Noimark S, Salvadori E, Gómez-Bombarelli R, MacRobert AJ, Parkin IP, Kay CWM. Comparative study of singlet oxygen production by photosensitiser dyes encapsulated in silicone: towards rational design of anti-microbial surfaces. Phys Chem Chem Phys 2016; 18:28101-28109. [DOI: 10.1039/c6cp02529c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Theoretical and experimental toolbox for the rational design of light-activated antimicrobial surfaces.
Collapse
Affiliation(s)
- Sacha Noimark
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Enrico Salvadori
- Institute of Structural and Molecular Biology and London Centre for Nanotechnology University College London
- London WC1E 6BT
- UK
- School of Biological and Chemical Sciences
- Queen Mary University of London
| | | | - Alexander J. MacRobert
- UCL Division of Surgery and Interventional Science
- University College London
- London WCIE 6AU
- UK
| | - Ivan P. Parkin
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Christopher W. M. Kay
- Institute of Structural and Molecular Biology and London Centre for Nanotechnology University College London
- London WC1E 6BT
- UK
| |
Collapse
|
25
|
Mosinger J, Lang K, Kubát P. Photoactivatable Nanostructured Surfaces for Biomedical Applications. Top Curr Chem (Cham) 2016; 370:135-68. [DOI: 10.1007/978-3-319-22942-3_5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
26
|
Ponja SD, Sehmi SK, Allan E, MacRobert AJ, Parkin IP, Carmalt CJ. Enhanced Bactericidal Activity of Silver Thin Films Deposited via Aerosol-Assisted Chemical Vapor Deposition. ACS APPLIED MATERIALS & INTERFACES 2015; 7:28616-28623. [PMID: 26632854 DOI: 10.1021/acsami.5b10171] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Silver thin films were deposited on SiO2-barrier-coated float glass, fluorine-doped tin oxide (FTO) glass, Activ glass, and TiO2-coated float glass via AACVD using silver nitrate at 350 °C. The films were annealed at 600 °C and analyzed by X-ray powder diffraction, X-ray photoelectron spectroscopy, UV/vis/near-IR spectroscopy, and scanning electron microscopy. All the films were crystalline, and the silver was present in its elemental form and of nanometer dimension. The antibacterial activity of these samples was tested against Escherichia coli and Staphylococcus aureus in the dark and under UV light (365 nm). All Ag-deposited films reduced the numbers of E. coli by 99.9% within 6 h and the numbers of S. aureus by 99.9% within only 2 h. FTO/Ag reduced bacterial numbers of E. coli to below the detection limit after 60 min and caused a 99.9% reduction of S. aureus within only 15 min of UV irradiation. Activ/Ag reduced the numbers of S. aureus by 66.6% after 60 min and TiO2/Ag killed 99.9% of S. aureus within 60 min of UV exposure. More remarkably, we observed a 99.9% reduction in the numbers of E. coli within 6 h and the numbers of S. aureus within 4 h in the dark using our novel TiO2/Ag system.
Collapse
Affiliation(s)
- Sapna D Ponja
- Materials Chemistry Research Centre, Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Sandeep K Sehmi
- Materials Chemistry Research Centre, Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
- UCL Division of Surgery and Interventional Science, University College London , 67-73 Riding House Street, London W1 W7EJ, United Kingdom
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London , 256 Gray's Inn Road, London WC1X 8LD, United Kingdom
| | - Elaine Allan
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London , 256 Gray's Inn Road, London WC1X 8LD, United Kingdom
| | - Alexander J MacRobert
- UCL Division of Surgery and Interventional Science, University College London , 67-73 Riding House Street, London W1 W7EJ, United Kingdom
| | - Ivan P Parkin
- Materials Chemistry Research Centre, Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Claire J Carmalt
- Materials Chemistry Research Centre, Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| |
Collapse
|
27
|
Sehmi SK, Noimark S, Weiner J, Allan E, MacRobert AJ, Parkin IP. Potent Antibacterial Activity of Copper Embedded into Silicone and Polyurethane. ACS APPLIED MATERIALS & INTERFACES 2015; 7:22807-22813. [PMID: 26418101 DOI: 10.1021/acsami.5b08665] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A simple, easily up-scalable swell-encapsulation-shrink technique was used to incorporate small 2.5 nm copper nanoparticles (CuNPs) into two widely used medical grade polymers, polyurethane, and silicone, with no significant impact on polymer coloration. Both medical grade polymers with incorporated CuNPs demonstrated potent antimicrobial activity against the clinically relevant bacteria, methicillin-resistant Staphylococcus aureus and Escherichia coli. CuNP-incorporated silicone samples displayed potent antibacterial activity against both bacteria within 6 h. CuNP-incorporated polyurethane exhibited more efficacious antimicrobial activity, resulting in a 99.9% reduction in the numbers of both bacteria within just 2 h. With the high prevalence of hospital-acquired infections, the use of antimicrobial materials such as these CuNP-incorporated polymers could contribute to reducing microbial contamination associated with frequently touched surfaces in and around hospital wards (e.g., bed rails, overbed tables, push plates, etc.).
Collapse
Affiliation(s)
- Sandeep K Sehmi
- Materials Chemistry Research Centre, Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
- UCL Division of Surgery and Interventional Science, University College London , 67-73 Riding House Street, London W1W 7EJ, United Kingdom
- Department of Microbial Diseases, UCL Eastman Dental Institute, University College London , 256 Gray's Inn Road, London WC1X 8LD, United Kingdom
| | - Sacha Noimark
- Materials Chemistry Research Centre, Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
- Department of Medical Physics and Biomedicals Engineering, University College London , Gower Street, London WC1E 6BT, United Kingdom
| | - Jonathan Weiner
- Department of Chemistry, Imperial College London , Imperial College Road, London SW7 2AZ, United Kingdom
| | - Elaine Allan
- Department of Microbial Diseases, UCL Eastman Dental Institute, University College London , 256 Gray's Inn Road, London WC1X 8LD, United Kingdom
| | - Alexander J MacRobert
- UCL Division of Surgery and Interventional Science, University College London , 67-73 Riding House Street, London W1W 7EJ, United Kingdom
| | - Ivan P Parkin
- Materials Chemistry Research Centre, Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| |
Collapse
|
28
|
Immobilized photosensitizers for antimicrobial applications. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 150:11-30. [DOI: 10.1016/j.jphotobiol.2015.04.021] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 04/17/2015] [Accepted: 04/19/2015] [Indexed: 01/21/2023]
|
29
|
Noimark S, Page K, Bear JC, Sotelo-Vazquez C, Quesada-Cabrera R, Lu Y, Allan E, Darr JA, Parkin IP. Functionalised gold and titania nanoparticles and surfaces for use as antimicrobial coatings. Faraday Discuss 2015; 175:273-87. [PMID: 25370309 DOI: 10.1039/c4fd00113c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report the preparation, characterisation and antimicrobial functional testing of various titanium dioxide and gold modified titanium dioxide nanoparticles embedded into a polysiloxane polymer by a swell dip-coating procedure. We show that the surfaces are effective in killing both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria under different lighting conditions. The presence of the nanoparticles was of critical importance in improving the functional properties of the surface. These materials have the potential to reduce hospital-acquired infection, by killing bacteria on the polymer surface.
Collapse
Affiliation(s)
- Sacha Noimark
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ, UK.
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Beech SJ, Noimark S, Page K, Noor N, Allan E, Parkin IP. Incorporation of crystal violet, methylene blue and safranin O into a copolymer emulsion; the development of a novel antimicrobial paint. RSC Adv 2015. [DOI: 10.1039/c5ra01673h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Crystal violet, methylene blue and safranin O were successfully incorporated into a co-polymer emulsion to make a potent antimicrobial paint.
Collapse
Affiliation(s)
- Sidney J. Beech
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Sacha Noimark
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Kristopher Page
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Nuruzzaman Noor
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Elaine Allan
- Division of Microbial Diseases
- UCL Eastman Dental Institute
- University College London
- London
- UK
| | - Ivan P. Parkin
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| |
Collapse
|
31
|
Bovis MJ, Noimark S, Woodhams JH, Kay CWM, Weiner J, Peveler WJ, Correia A, Wilson M, Allan E, Parkin IP, MacRobert AJ. Photosensitisation studies of silicone polymer doped with methylene blue and nanogold for antimicrobial applications. RSC Adv 2015. [DOI: 10.1039/c5ra09045h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
2 nm gold nanoparticle (AuNP) and methylene blue (MB) incorporated into medical-grade silicone polymer for antimicrobial applications.
Collapse
|
32
|
Sehmi SK, Noimark S, Bear JC, Peveler WJ, Bovis M, Allan E, MacRobert AJ, Parkin IP. Lethal photosensitisation of Staphylococcus aureus and Escherichia coli using crystal violet and zinc oxide-encapsulated polyurethane. J Mater Chem B 2015; 3:6490-6500. [DOI: 10.1039/c5tb00971e] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Bactericidal polymer surfaces were prepared by crystal violet and ZnO nanoparticle encapsulation, demonstrating 99.9% dark kill ofE. coli.
Collapse
Affiliation(s)
- Sandeep K. Sehmi
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Sacha Noimark
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Joseph C. Bear
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - William J. Peveler
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| | - Melissa Bovis
- UCL Division of Surgery and Interventional Science
- University College London
- London
- UK
| | - Elaine Allan
- Division of Microbial Diseases
- UCL Eastman Dental Institute
- University College London
- London
- UK
| | | | - Ivan P. Parkin
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London
- UK
| |
Collapse
|
33
|
Ozkan E, Ozkan FT, Allan E, Parkin IP. The use of zinc oxide nanoparticles to enhance the antibacterial properties of light-activated polydimethylsiloxane containing crystal violet. RSC Adv 2015. [DOI: 10.1039/c4ra13649g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Crystal violet–ZnO mixtures were incorporated into PDMS by a simple two step method. The modified polymer demonstrated significant antibacterial activity againstE. coliandS. aureus, showing possibly the most potent light-induced antibacterial polymer reported to date.
Collapse
Affiliation(s)
- Ekrem Ozkan
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Feyza Tunali Ozkan
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Elaine Allan
- Division of Microbial Diseases
- UCL Eastman Dental Institute
- University College London
- London
- UK
| | - Ivan P. Parkin
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| |
Collapse
|
34
|
Mthethwa T, Nyokong T. Photoinactivation of Candida albicans and Escherichia coli using aluminium phthalocyanine on gold nanoparticles. Photochem Photobiol Sci 2015; 14:1346-56. [DOI: 10.1039/c4pp00315b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conjugates of aluminium phthalocyanine with gold nanorods (AlPc–AuNRs) and nanohexagons (AlPc–AuNHs) show improved photoinactivation of fungi (C. albicans) and bacteria cells (E. coli) compared to Pc alone.
Collapse
|
35
|
Crick CR, Noimark S, Peveler WJ, Bear JC, Ivanov AP, Edel JB, Parkin IP. Advanced analysis of nanoparticle composites – a means toward increasing the efficiency of functional materials. RSC Adv 2015. [DOI: 10.1039/c5ra08788k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Direct visualisation of embedded nanoparticles allows for quantification of their concentration, at the surface and the bulk of host matrix.
Collapse
Affiliation(s)
- C. R. Crick
- Department of Chemistry
- Imperial College London
- South Kensington Campus
- London
- UK
| | - S. Noimark
- Department of Chemistry
- University College London
- London
- UK
| | | | - J. C. Bear
- Department of Chemistry
- University College London
- London
- UK
| | - A. P. Ivanov
- Department of Chemistry
- Imperial College London
- South Kensington Campus
- London
- UK
| | - J. B. Edel
- Department of Chemistry
- Imperial College London
- South Kensington Campus
- London
- UK
| | - I. P. Parkin
- Department of Chemistry
- University College London
- London
- UK
| |
Collapse
|
36
|
Light-activated antibacterial screen protectors for mobile telephones and tablet computers. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2014.08.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
37
|
Noimark S, Allan E, Parkin IP. Light-activated antimicrobial surfaces with enhanced efficacy induced by a dark-activated mechanism. Chem Sci 2014. [DOI: 10.1039/c3sc53186d] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report a potent antimicrobial polymer demonstrating an enhanced bactericidal activity upon white light illumination.
Collapse
Affiliation(s)
- Sacha Noimark
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London, UK
| | - Elaine Allan
- Division of Microbial Diseases
- UCL Eastman Dental Institute
- University College London
- London, UK
| | - Ivan P. Parkin
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London, UK
| |
Collapse
|
38
|
Simon T, Boca-Farcau S, Gabudean AM, Baldeck P, Astilean S. LED-activated methylene blue-loaded Pluronic-nanogold hybrids for in vitro photodynamic therapy. JOURNAL OF BIOPHOTONICS 2013; 6:950-959. [PMID: 23893922 DOI: 10.1002/jbio.201300058] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 07/02/2013] [Accepted: 07/03/2013] [Indexed: 06/02/2023]
Abstract
In this work we introduce a new class of multifunctional photodynamic agents based on the coupling of photosensitizer molecules with noble metal nanoparticles, which can be efficiently activated under low light intensity. The favourable modification of the photophysical properties of methylene blue (MB) in MB-loaded Pluronic-nanogold hybrids (Au-PF127-MB) increases the probability of singlet oxygen generation, which in turn allows the use of a light emitting diode (LED) irradiation source instead of commonly used, more invasive lasers. In this regard, Au-PF127-MB treated human lung carcinoma cells (HTB 177) were irradiated at different light doses, using a 660 nm LED source, the results indicating a dose dependent therapeutic effect, decreasing the cell viability down to 13%. Owing to their effectiveness, biocompatibility and integrated imaging and therapeutic functionalities, Au-PF127-MB could represent an important development in the field of biophotonic applications.
Collapse
Affiliation(s)
- Timea Simon
- Babes-Bolyai University, Faculty of Physics and Interdisciplinary Research Institute in Bio-Nano-Sciences, Nanobiophotonics and Laser Microspectroscopy Center, M. Kogalniceanu Str. 1, 400084, Cluj-Napoca, Romania; Laboratoire Interdisciplinaire de Physique, UMR 5588, CNRS, Universite Joseph Fourier and CNRS, 140 rue de la Physique, 87 38402, Saint Martin d'Heres cedex, France
| | | | | | | | | |
Collapse
|
39
|
Shining light on materials--a self-sterilising revolution. Adv Drug Deliv Rev 2013; 65:570-80. [PMID: 22819684 DOI: 10.1016/j.addr.2012.07.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 06/15/2012] [Accepted: 07/06/2012] [Indexed: 12/20/2022]
Abstract
This review focuses on the development of light activated antimicrobial surfaces. These surfaces kill microbes by the action of light and have potential applications in domestic and healthcare settings. The inspiration for the new self-cleaning surfaces originates from photodynamic therapy where light is used to locate and destroy tumours. The first generation photosensitiser molecules, based on a porphyrin ring structure, could be considered as bioinspired and chemically related to chlorophyll. The review looks at developments of both soft polymeric surfaces with either surface bound or impregnated photosensitiser molecules; and hard inorganic surfaces such as modified titanium dioxide. The bacterial kill mechanisms are looked into with both surface types showing primary microbial kill through a radical induced pathway. The hard inorganic surfaces also show low bacterial adherence by means of a light activated photo-wetting of the surfaces meaning that they are "Easy Clean" and wash off microbes uniformly.
Collapse
|
40
|
Noimark S, Bovis M, MacRobert AJ, Correia A, Allan E, Wilson M, Parkin IP. Photobactericidal polymers; the incorporation of crystal violet and nanogold into medical grade silicone. RSC Adv 2013. [DOI: 10.1039/c3ra42629g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
41
|
Crick CR, Bear JC, Kafizas A, Parkin IP. Superhydrophobic photocatalytic surfaces through direct incorporation of titania nanoparticles into a polymer matrix by aerosol assisted chemical vapor deposition. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:3505-8. [PMID: 22706974 DOI: 10.1002/adma.201201239] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 05/17/2012] [Indexed: 05/24/2023]
Abstract
A new class of superhydrophobic photocatalytic surfaces that are self-cleaning through light-induced photodegradation and the Lotus effect are presented. The films are formed in a single-step aerosol-assisted chemical vapor deposition (AACVD) process. The films are durable and show no degradation on continuous exposure to UV-C radiation.
Collapse
Affiliation(s)
- Colin R Crick
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | | | | | | |
Collapse
|
42
|
Noimark S, Dunnill CW, Kay CWM, Perni S, Prokopovich P, Ismail S, Wilson M, Parkin IP. Incorporation of methylene blue and nanogold into polyvinyl chloride catheters; a new approach for light-activated disinfection of surfaces. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31987j] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
43
|
Sousa C, Henriques M, Oliveira R. Mini-review: Antimicrobial central venous catheters--recent advances and strategies. BIOFOULING 2011; 27:609-20. [PMID: 21718230 DOI: 10.1080/08927014.2011.593261] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Central venous catheters (CVCs) nowadays constitute critical devices used in medical care, namely in intensive care units. However, CVCs also represent one of the indwelling medical devices with enhanced risk of nosocomial device-related infection. Catheter-related infections (CRIs) are a major cause of patient morbidity and mortality, often justifying premature catheter removal and an increase in costs and use of resources. Adhesion and subsequent biofilm formation on the surfaces of indwelling catheters is elemental to the onset of pathogenesis. Seeking the prevention of CVC colonisation and CRI, a variety of approaches have been studied, tested and, in some cases, already applied in clinical practice. This review looks at the current preventive strategies often used to decrease the risk of CRIs due to colonization and biofilm formation on catheter surfaces, as well as at the more recent approaches under investigation.
Collapse
Affiliation(s)
- Cláudia Sousa
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar 4710-057, Braga, Portugal
| | | | | |
Collapse
|
44
|
Rhodes R, O’Brien P, Saunders BR. Triggered aggregation of PbS nanocrystal dispersions; towards directing the morphology of hybrid polymer films using a removable bilinker ligand. J Colloid Interface Sci 2011; 358:151-9. [DOI: 10.1016/j.jcis.2011.02.069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 02/23/2011] [Accepted: 02/27/2011] [Indexed: 11/30/2022]
|
45
|
Liu N, Sun G. Photoinduced decolorization of 2, 6-dichloroindophenol by 2-anthraquinone sulfonate treated nylon. ACS APPLIED MATERIALS & INTERFACES 2011; 3:1221-1227. [PMID: 21355579 DOI: 10.1021/am200047a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Photoactive 2-anthraquinone sulfonate sodium (2-AQS) can produce hydroxyl radical and other reactive oxygen species under UVA irradiation. Because of its acid dye like feature, 2-AQS was immobilized onto nylon fibers through an acid dyeing process, and the dyed nylon was employed as a photoactive self-cleaning material. As a model study, decolorization of representative colorants such as 2,6-dichloroindophenol (DCIP) by the material was investigated. The results revealed that DCIP was first absorbed on the fibers and then degraded by hydroxyl radicals and other reactive oxygen species generated by 2-AQS on the surfaces upon UVA exposure. The photo degradation pathway of DCIP was further studied by directly using aqueous 2-AQS solution, and the degraded products in the solutions were analyzed by LC-MS. Different light sources and hydrogen donors were investigated in degradation of DCIP. The photoactive functions on the 2-AQS-dyed nylon fibers were quite durable and maintained similar decolorization effect of DCIP after five repeated tests.
Collapse
Affiliation(s)
- Ning Liu
- Fiber and Polymer Science, University of California, Davis, California 95616, USA
| | | |
Collapse
|
46
|
Dunnill CW, Ansari Z, Kafizas A, Perni S, Morgan DJ, Wilson M, Parkin IP. Visible light photocatalysts—N-doped TiO2 by sol–gel, enhanced with surface bound silver nanoparticle islands. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11557j] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
47
|
Perni S, Prokopovich P, Pratten J, Parkin IP, Wilson M. Nanoparticles: their potential use in antibacterial photodynamic therapy. Photochem Photobiol Sci 2011; 10:712-20. [DOI: 10.1039/c0pp00360c] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|