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Dallagi H, Jha PK, Faille C, LE-Bail A, Rawson A, Benezech T. Removal of biocontamination in the food industry using physical methods; an overview. Food Control 2023. [DOI: 10.1016/j.foodcont.2023.109645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Liu T, Chang TL, Zhou X, Ruppel S, Liang JF. Phase separation enabled silver nano-array. NANOTECHNOLOGY 2022; 34:065301. [PMID: 36347019 DOI: 10.1088/1361-6528/aca0f5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
The surface-supported silver nanoparticles have been studied and applied in various applications. Many unique nanostructures have been introduced into this field to improve the functionalities of the surfaces depending on application purposes. We created featured silver nano-array surfaces by utilizing the solvent-mediated phase transition on the surface grafted with poly (acrylic) acids polymer chains and taking advantage of the low temperature of argon gas discharged plasma as a reducing agent. The applied solvents and grafted polymer chain densities affected the phase transition and thus determined the outcome of surface nano-array patterns. However, the total loaded silver ions on the surface affected silver nano-array structures at the sub-micron levels. The featured silver patterned surfaces made in the optimal conditions present a favorable surface-enhanced Raman spectroscopy enhancement as well as recyclability for detection re-usage. This novel method prepares tunable silver nanopatterned surfaces and provides a new approach to various potential applications.
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Affiliation(s)
- Tianchi Liu
- Tianchi Liu, Tzu-Lan Chang, Scott Ruppel, and Xiaqing Zhou, graduate students, Department of Chemistry, and Chemical Biology, Schaefer School of Engineering and Science, Stevens Institute of Technology, Hoboken, NJ, 07030, United States of America
| | - Tzu-Lan Chang
- Tianchi Liu, Tzu-Lan Chang, Scott Ruppel, and Xiaqing Zhou, graduate students, Department of Chemistry, and Chemical Biology, Schaefer School of Engineering and Science, Stevens Institute of Technology, Hoboken, NJ, 07030, United States of America
| | - Xiaqing Zhou
- Tianchi Liu, Tzu-Lan Chang, Scott Ruppel, and Xiaqing Zhou, graduate students, Department of Chemistry, and Chemical Biology, Schaefer School of Engineering and Science, Stevens Institute of Technology, Hoboken, NJ, 07030, United States of America
| | - Scott Ruppel
- Tianchi Liu, Tzu-Lan Chang, Scott Ruppel, and Xiaqing Zhou, graduate students, Department of Chemistry, and Chemical Biology, Schaefer School of Engineering and Science, Stevens Institute of Technology, Hoboken, NJ, 07030, United States of America
| | - Jun F Liang
- Tianchi Liu, Tzu-Lan Chang, Scott Ruppel, and Xiaqing Zhou, graduate students, Department of Chemistry, and Chemical Biology, Schaefer School of Engineering and Science, Stevens Institute of Technology, Hoboken, NJ, 07030, United States of America
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Recent Advances in Prion Inactivation by Plasma Sterilizer. Int J Mol Sci 2022; 23:ijms231810241. [PMID: 36142166 PMCID: PMC9499420 DOI: 10.3390/ijms231810241] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/27/2022] [Accepted: 09/04/2022] [Indexed: 12/31/2022] Open
Abstract
Prions, which cause transmissible spongiform encephalopathies (TSEs), are a notorious group of infectious agents with possibly the highest resistance to complete inactivation. Although various gas plasma instruments have been developed, studies on prion inactivation using gas plasma instruments are limited. Among them, the hydrogen peroxide gas plasma instrument, STERRAD® (Advanced Sterilization Products; ASP, Johnson & Johnson, Irvine, CA, USA), is recommended for prion inactivation of heat-sensitive medical devices. However, STERRAD® is not a plasma sterilizer but a hydrogen peroxide gas sterilizer. In STERRAD®, plasma generated by radio frequency (RF) discharge removes excess hydrogen peroxide gas and does not contribute to sterilization. This is also supported by evidence that the instrument was not affected by the presence or absence of RF gas plasma. However, recent studies have shown that other gas plasma instruments derived from air, nitrogen, oxygen, Ar, and a mixture of gases using corona, dielectric barrier, microwave, and pulse discharges can inactivate scrapie prions. As inactivation studies on prions other than scrapie are limited, further accumulation of evidence on the effectiveness of gas plasma using human-derived prion samples is warranted for practical purposes.
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Avellar HK, Williams MR, Brandão J, Narayanan S, Ramachandran A, Holbrook TC, Schoonover MJ, Bailey KL, Payton ME, Pai KK, Timmons CT. Safety and efficacy of cold atmospheric plasma for the sterilization of a Pasteurella multocida-contaminated subcutaneously implanted foreign body in rabbits. Am J Vet Res 2021; 82:118-124. [PMID: 33480278 DOI: 10.2460/ajvr.82.2.118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine whether a stainless steel implant sterilized with a novel cold atmospheric plasma sterilization (CAPS) device adversely affects local tissues in rabbits and whether CAPS was as effective as steam sterilization with an autoclave to inactivate Pasteurella multocida. ANIMALS 31 healthy New Zealand White rabbits. PROCEDURES Steam-autoclaved stainless steel implants inoculated with P multocida underwent a second steam autoclave sterilization (AIA) or CAPS (AICAPS). One AIA implant and 3 AICAPS implants were randomly placed subcutaneously at 4 sites in 21 rabbits (84 implants). These rabbits were monitored daily for 5 days for evidence of systemic illness and local tissue reactions at the implantation sites and then euthanized. Samples were taken from each implant site for bacterial culture and histologic examination. RESULTS Cultures of samples obtained from all sites were negative for bacterial growth. No significant difference was observed in mean skin thickness or erythema between AIA and AICAPS implant sites on any observed day. Also, individual histologic grades for the epidermis, dermis, subcutis, and muscle and total histologic grade were not significantly different between AIA and AICAPS implant sites. CONCLUSIONS AND CLINICAL RELEVANCE Cold atmospheric plasma sterilization was noninferior to steam sterilization of P multocida-contaminated stainless steel implants in the rabbits in the present study. However, studies of the efficacy of CAPS for inactivation of other important bacteria are needed.
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Kim B, Seo H, Lee JH, Kim S, Choi WI, Sung D, Moon E. Enhanced Antibiofilm Effects of N 2 Plasma-Treated Buffer Combined with Antimicrobial Hexapeptides Against Plant Pathogens. Polymers (Basel) 2020; 12:polym12091992. [PMID: 32883040 PMCID: PMC7564792 DOI: 10.3390/polym12091992] [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: 07/10/2020] [Revised: 08/27/2020] [Accepted: 08/31/2020] [Indexed: 12/31/2022] Open
Abstract
Suppression of pathogenic bacterial growth to increase food and agricultural productivity is important. We previously developed novel hexapeptides (KCM12 and KCM21) with antimicrobial activities against various phytopathogenic bacteria and N2 plasma-treated buffer (NPB) as an alternative method for bacterial inactivation and as an antibiofilm agent of crops. Here, we developed an enhanced antibiofilm method based on antimicrobial hexapeptides with N2 plasma-treated buffer against plant pathogens. Our results demonstrated that hexapeptides effectively inhibited the growth of Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) and the biofilm it formed. Potent biofilm formation-inhibiting effects of hexapeptides were observed at concentrations of above 20 µM, and samples treated with hexapeptide above 100 µM reduced the ability of the bacteria to produce biofilm by 80%. 3D confocal laser scanning microscopy imaging data revealed that the antimicrobial activity of hexapeptides was enough to affect the cells embedded inside the biofilm. Finally, combination treatment with NPB and antimicrobial hexapeptides increased the antibiofilm effect compared with the effect of single processing against multilayered plant pathogen biofilms. These findings show that the combination of hexapeptides and NPB can be potentially applied for improving crop production.
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Affiliation(s)
- Bohyun Kim
- Department of Biological Science, College of Natural Sciences, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, Gyeonggi-do 16499, Korea; (B.K.); (H.S.)
| | - Hyemi Seo
- Department of Biological Science, College of Natural Sciences, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, Gyeonggi-do 16499, Korea; (B.K.); (H.S.)
- Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Korea; (J.H.L.); (S.K.); (W.I.C.)
| | - Jin Hyung Lee
- Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Korea; (J.H.L.); (S.K.); (W.I.C.)
| | - Sunghyun Kim
- Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Korea; (J.H.L.); (S.K.); (W.I.C.)
| | - Won Il Choi
- Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Korea; (J.H.L.); (S.K.); (W.I.C.)
| | - Daekyung Sung
- Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Korea; (J.H.L.); (S.K.); (W.I.C.)
- Correspondence: (D.S.); (E.M.); Tel.: +82-43-913-1511 (D.S.); +82-31-219-2620 (E.M.); Fax: +82-43-913-1597 (D.S.); +82-31-219-1615 (E.M.)
| | - Eunpyo Moon
- Department of Biological Science, College of Natural Sciences, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, Gyeonggi-do 16499, Korea; (B.K.); (H.S.)
- Correspondence: (D.S.); (E.M.); Tel.: +82-43-913-1511 (D.S.); +82-31-219-2620 (E.M.); Fax: +82-43-913-1597 (D.S.); +82-31-219-1615 (E.M.)
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Potential of non-thermal N2 plasma-treated buffer (NPB) for inhibiting plant pathogenic bacteria and enhancing food storage. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109210] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Seo H, Hong J, Kim T, Choi WL, Sung D, Moon E. Super-antibiofilm effect of N 2 plasma treated buffer (NPB) against plant pathogenic bacterium. J Biol Eng 2019; 13:94. [PMID: 31827604 PMCID: PMC6894343 DOI: 10.1186/s13036-019-0222-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 11/19/2019] [Indexed: 12/14/2022] Open
Abstract
Controlling of biofilms formation in numerous pathogenic bacteria is one of the most difficult tasks in the control of bacterial diseases. Plasma has attracted extensive attention due to their potential applications for effective inhibiting of biofilm. Recently, plasma-activated water (PAW) has developed as an alternative method for bacterial inactivation and disinfection of foods owing to advantages of more convenient and efficient storage and transportation than direct plasma application. However, most previous studies about PAW have only focused on the improvement of its antibacterial effect instead of antibiofilm activity. Therefore, we report the development of N2 plasma treated buffer (NPB) and the super-antibiofilm effect of NPB against Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) as a plant pathogenic bacterium. Scavenger assays using various antioxidants revealed that reactive oxygen species were involved in the inhibitory cellular actions of NPB, with H2O2 and singlet oxygen proving essential for bacterial death. Intensive analysis of NPB, stored at different periods and temperatures, showed that the antimicrobial efficacy was well maintained for 3 months at − 80 °C. Importantly, further studies showed that NPB effectively inhibited not only the growth of planktonic Pst DC3000 but also biofilm formation. The remarkable inhibition on the biofilm was analyzed and visualized using LIVE/DEAD viability assays and confocal laser scanning microscopy (CLSM) imaging. The 3D CLSM imaging data revealed that the bactericidal activity of NPB was permeable enough to affect the cells embedded inside the biofilm. This prominent permeability could be a crucial feature of NPB contributing to effective super-antibiofilm.
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Affiliation(s)
- Hyemi Seo
- 1Department of Biological Science, College of Natural Sciences, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, 16499 Gyeonggi-do Republic of Korea.,2Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160 Republic of Korea
| | - Jisoo Hong
- 1Department of Biological Science, College of Natural Sciences, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, 16499 Gyeonggi-do Republic of Korea.,3Microbial Safety Team, National Institute of Agricultural Sciences, Rural Development Administration, 300, Nongsaengmyeong-ro, Deokjin-gu, Jeonju, 54875 Jeonbuk Republic of Korea
| | - Taeyeol Kim
- 1Department of Biological Science, College of Natural Sciences, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, 16499 Gyeonggi-do Republic of Korea
| | - Won Ll Choi
- 2Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160 Republic of Korea
| | - Daekyung Sung
- 2Center for Convergence Bioceramic Materials, Korea Institute of Ceramic Engineering and Technology, 202, Osongsaengmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160 Republic of Korea
| | - Eunpyo Moon
- 1Department of Biological Science, College of Natural Sciences, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, 16499 Gyeonggi-do Republic of Korea
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Sakudo A, Yagyu Y, Onodera T. Disinfection and Sterilization Using Plasma Technology: Fundamentals and Future Perspectives for Biological Applications. Int J Mol Sci 2019; 20:ijms20205216. [PMID: 31640211 PMCID: PMC6834201 DOI: 10.3390/ijms20205216] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/19/2019] [Accepted: 10/21/2019] [Indexed: 02/07/2023] Open
Abstract
Recent studies have shown that plasma can efficiently inactivate microbial pathogens such as bacteria, fungi, and viruses in addition to degrading toxins. Moreover, this technology is effective at inactivating pathogens on the surface of medical and dental devices, as well as agricultural products. The current practical applications of plasma technology range from sterilizing therapeutic medical devices to improving crop yields, as well as the area of food preservation. This review introduces recent advances and future perspectives in plasma technology, especially in applications related to disinfection and sterilization. We also introduce the latest studies, mainly focusing on the potential applications of plasma technology for the inactivation of microorganisms and the degradation of toxins.
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Affiliation(s)
- Akikazu Sakudo
- Faculty of Veterinary Medicine, Okayama University of Science, Imabari, Ehime 794-8555, Japan.
| | - Yoshihito Yagyu
- Department of Electrical and Electric Engineering, National Institute of Technology Sasebo College, Nagasaki 857-1193, Japan.
| | - Takashi Onodera
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.
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Abstract
The formation of bacterial biofilm on implanted devices or damaged tissues leads to biomaterial-associated infections often resulting in life-threatening diseases and implant failure. It is a challenging process to eradicate biofilms as they are resistant to antimicrobial treatments. Conventional techniques, such as high heat and chemicals exposure, may not be suitable for biofilm removal in nosocomial settings. These techniques create surface degradation on the treated materials and lead to environmental pollution due to the use of toxic chemicals. A novel technique known as non-thermal plasma has a great potential to decontaminate or sterilize those nosocomial biofilms. This article aims to provide readers with an extensive review of non-thermal plasma and biofilms to facilitate further investigations. A brief introduction summarizes the problem caused by biofilms in hospital settings with current techniques used for biofilm inactivation followed by the literature review strategy. The remainder of the review discusses plasma and its generation, the role played by plasma reactive species, various factors affecting the antimicrobial efficacy of non-thermal plasma and summarizes many studies published in the field.
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Kawano H, Takamatsu T, Matsumura Y, Miyahara H, Iwasawa A, Okino A. Influence of Gas Temperature in Atmospheric Non-Equilibrium Plasma on Bactericidal Effect. Biocontrol Sci 2018; 23:167-175. [PMID: 30584203 DOI: 10.4265/bio.23.167] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
In this study, the relationship between plasma gas temperature and the bactericidal effects on five of bacteria (Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Enterococcus faecalis and Bacillus cereus (spore)) in liquid was investigated using a temperature-controllable plasma source. We determined that the bactericidal ability improved as the plasma gas temperature increased. Specifically, the bactericidal ability on E. coli of 80-℃ plasma was enhanced by as much as 6.3 times compared to that of 10-℃ plasma. The relationship between plasma gas temperature and the amount of hydroxyl radical, singlet oxygen, hydrogen peroxide, and ozone introduced into the solution was investigated. Our results also showed that each reactive species production increased by 2.1, 9.0, 1.6, and 17 times, respectively, with 80-℃ compared to 10-℃ plasma. The relationship between the bactericidal ability and amount of reactive species indicated that singlet oxygen and ozone introduced to the solution mostly influenced the bactericidal ability as the plasma gas temperature increased. We conclude that the plasma gas temperature is the crucial parameter for plasma sterilization.
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Affiliation(s)
| | - Toshihiro Takamatsu
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Yuriko Matsumura
- Division of Infection Prevention and Control, Tokyo Healthcare University
| | | | - Atsuo Iwasawa
- Division of Infection Prevention and Control, Tokyo Healthcare University
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Wang J, Yu Z, Xu Z, Hu S, Li Y, Xue X, Cai Q, Zhou X, Shen J, Lan Y, Cheng C. Antimicrobial mechanism and the effect of atmospheric pressure N 2 plasma jet on the regeneration capacity of Staphylococcus aureus biofilm. BIOFOULING 2018; 34:935-949. [PMID: 30477343 DOI: 10.1080/08927014.2018.1530350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 08/13/2018] [Accepted: 09/18/2018] [Indexed: 06/09/2023]
Abstract
This study systematically assessed the inactivation mechanism on Staphylococcus aureus biofilms by a N2 atmospheric-pressure plasma jet and the effect on the biofilm regeneration capacity from the bacteria which survived, and their progenies. The total bacterial populations were 7.18 ± 0.34 log10 CFU ml-1 in biofilms and these were effectively inactivated (>5.5-log10 CFU ml-1) within 30 min of exposure. Meanwhile, >80% of the S. aureus biofilm cells lost their metabolic capacity. In comparison, ∼20% of the plasma-treated bacteria entered a viable but non-culturable state. Moreover, the percentage of membrane-intact bacteria declined to ∼30%. Scanning electron microscope images demonstrated cell shrinkage and deformation post-treatment. The total amount of intracellular reactive oxygen species was observed to have significantly increased in membrane-intact bacterial cells with increasing plasma dose. Notably, the N2 plasma treatment could effectively inhibit the biofilm regeneration ability of the bacteria which survived, leading to a long-term phenotypic response and dose-dependent inactivation effect on S. aureus biofilms, in addition to the direct rapid bactericidal effect.
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Affiliation(s)
- Jiaquan Wang
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
| | - Zhiyuan Yu
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
| | - Zimu Xu
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
- b Institute of Plasma Physics , Chinese Academy of Sciences , Hefei , PR China
- c Center of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
- d Anhui Province Key Laboratory of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
| | - Shuheng Hu
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
| | - Yunxia Li
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
| | - Xiaojuan Xue
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
| | - Qiuchen Cai
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
| | - Xiaoxia Zhou
- a School of Resources and Environmental Engineering , Hefei University of Technology , Hefei , Anhui Province , PR China
| | - Jie Shen
- b Institute of Plasma Physics , Chinese Academy of Sciences , Hefei , PR China
- c Center of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
- d Anhui Province Key Laboratory of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
| | - Yan Lan
- b Institute of Plasma Physics , Chinese Academy of Sciences , Hefei , PR China
- c Center of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
- d Anhui Province Key Laboratory of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
| | - Cheng Cheng
- b Institute of Plasma Physics , Chinese Academy of Sciences , Hefei , PR China
- c Center of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
- d Anhui Province Key Laboratory of Medical Physics and Technology , Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei , PR China
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Chen TP, Liang J, Su TL. Plasma-activated water: antibacterial activity and artifacts? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:26699-26706. [PMID: 28540555 DOI: 10.1007/s11356-017-9169-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Broad biological activities of "plasma-activated water" (PAW) have drawn great attentions recently. Treatment of water using gas discharge plasma led to acidic solutions with excellent and broad antibacterial activity. Because PAW caused severe membrane damages in bacteria and diffused freely in extracellular matrix, PAW also demonstrated good anti-biofilm activity. However, further studies revealed that trace amounts of metal ions (mainly copper and zinc) in PAW brought by plasma treatment played key roles in bacteria inactivation. The contribution of metal ions to the antibacterial activity varied among PAWs from different working gases. However, solution acidification caused by reactive species in plasma was essential. The experimental results demonstrated that potential artifacts in reported biological activities of PAWs should be considered.
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Affiliation(s)
- Tung-Po Chen
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07307, USA
| | - Junfeng Liang
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Charles V. Schaefer School of Engineering and Science, Stevens Institute of Technology, Hoboken, NJ, 07307, USA.
| | - Tsan-Liang Su
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07307, USA.
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Jablonowski L, Fricke K, Matthes R, Holtfreter B, Schlüter R, von Woedtke T, Weltmann KD, Kocher T. Removal of naturally grown human biofilm with an atmospheric pressure plasma jet: An in-vitro study. JOURNAL OF BIOPHOTONICS 2017; 10:718-726. [PMID: 27539641 DOI: 10.1002/jbio.201600166] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 07/26/2016] [Accepted: 08/01/2016] [Indexed: 06/06/2023]
Abstract
The removal of biofilm is a prerequisite for a successful treatment of biofilm-associated diseases. In this study, we compared the feasibility of an atmospheric pressure plasma device with a sonic powered brush to remove naturally grown supragingival biofilm from extracted teeth. Twenty-four periodontally hopeless teeth were extracted. Argon jet plasma with an oxygen admixture of 1 vol% and a sonically driven brush were used to remove biofilm with application times of 60 s, 180 s and 300 s. The treatment efficiency was assessed with light microscopy, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The highest biofilm removal rate was observed after an application time of 180 s/300 s with the sonic brush (80.4%/86.2%), plasma (75.5%/89.0%). These observations were confirmed by SEM. According to XPS analysis, plasma treatment decreased the amount of carbon and nitrogen, indicative of an extensive removal of proteins. Plasma treatment of naturally grown biofilm resulted in an effective cleaning of the tooth surface and was comparable to mechanical treatment. Treatment time had a significant influence on plaque reduction. These results showed that plasma could be a useful adjuvant treatment modality in cases where biofilm removal or reduction plays a decisive role, such as periodontitis and peri-implantitis. Plasma-treated biofilm on an extracted tooth.
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Affiliation(s)
- Lukasz Jablonowski
- Unit of Periodontology, Department of Restorative Dentistry, Periodontology, Endodontology, Preventive Dentistry and Pedodontics, Dental School, University Medicine Greifswald, Germany
- Leibniz Institute for Plasma Science and Technology e.V. (INP Greifswald), Greifswald, Germany
| | - Katja Fricke
- Leibniz Institute for Plasma Science and Technology e.V. (INP Greifswald), Greifswald, Germany
| | - Rutger Matthes
- Unit of Periodontology, Department of Restorative Dentistry, Periodontology, Endodontology, Preventive Dentistry and Pedodontics, Dental School, University Medicine Greifswald, Germany
- Leibniz Institute for Plasma Science and Technology e.V. (INP Greifswald), Greifswald, Germany
| | - Birte Holtfreter
- Unit of Periodontology, Department of Restorative Dentistry, Periodontology, Endodontology, Preventive Dentistry and Pedodontics, Dental School, University Medicine Greifswald, Germany
| | - Rabea Schlüter
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald, Germany
| | - Thomas von Woedtke
- Leibniz Institute for Plasma Science and Technology e.V. (INP Greifswald), Greifswald, Germany
| | - Klaus-Dieter Weltmann
- Leibniz Institute for Plasma Science and Technology e.V. (INP Greifswald), Greifswald, Germany
| | - Thomas Kocher
- Unit of Periodontology, Department of Restorative Dentistry, Periodontology, Endodontology, Preventive Dentistry and Pedodontics, Dental School, University Medicine Greifswald, Germany
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Ziuzina D, Han L, Cullen PJ, Bourke P. Cold plasma inactivation of internalised bacteria and biofilms for Salmonella enterica serovar Typhimurium, Listeria monocytogenes and Escherichia coli. Int J Food Microbiol 2015; 210:53-61. [PMID: 26093991 DOI: 10.1016/j.ijfoodmicro.2015.05.019] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 05/12/2015] [Accepted: 05/27/2015] [Indexed: 10/23/2022]
Abstract
Microbial biofilms and bacteria internalised in produce tissue may reduce the effectiveness of decontamination methods. In this study, the inactivation efficacy of in-package atmospheric cold plasma (ACP) afterglow was investigated against Salmonella Typhimurium, Listeria monocytogenes and Escherichia coli in the forms of planktonic cultures, biofilms formed on lettuce and associated bacteria internalised in lettuce tissue. Prepared lettuce broth (3%) was inoculated with bacteria resulting in a final concentration of ~7.0 log10 CFU/ml. For biofilm formation and internalisation, lettuce pieces (5 × 5 cm) were dip-inoculated in bacterial suspension of ~7.0 log10 CFU/ml for 2 h and further incubated for 0, 24 and 48 h at either 4 °C or room temperature (~22 °C) in combination with light/dark photoperiod or at 4 °C under dark conditions. Inoculated samples were sealed inside a rigid polypropylene container and indirectly exposed (i.e. placed outside plasma discharge) to a high voltage (80 kVRMS) air ACP with subsequent storage for 24 h at 4 °C. ACP treatment for 30s reduced planktonic populations of Salmonella, L. monocytogenes and E. coli suspended in lettuce broth to undetectable levels. Depending on storage conditions, bacterial type and age of biofilm, 300 s of treatment resulted in reduction of biofilm populations on lettuce by a maximum of 5 log10 CFU/sample. Scanning electron and confocal laser microscopy pointed to the incidence of bacterial internalisation and biofilm formation, which influenced the inactivation efficacy of ACP. Measured intracellular reactive oxygen species (ROS) revealed that the presence of organic matter in the bacterial suspension might present a protective effect against the action of ROS on bacterial cells. This study demonstrated that high voltage in-package ACP could be a potential technology to overcome bacterial challenges associated with food produce. However, the existence of biofilms and internalised bacteria should be considered for further optimisation of ACP treatment parameters in order to achieve an effective control of the realistic challenges posed by foodborne pathogens.
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Affiliation(s)
- Dana Ziuzina
- Plasma Research Group, School of Food Science and Environmental Health, Dublin Institute of Technology, Dublin 1, Ireland
| | - Lu Han
- Plasma Research Group, School of Food Science and Environmental Health, Dublin Institute of Technology, Dublin 1, Ireland
| | - Patrick J Cullen
- School of Chemical Engineering, University of New South Wales, Sydney, Australia
| | - Paula Bourke
- Plasma Research Group, School of Food Science and Environmental Health, Dublin Institute of Technology, Dublin 1, Ireland.
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Wang BL, Jin TW, Han YM, Shen CH, Li Q, Lin QK, Chen H. Bio-inspired terpolymers containing dopamine, cations and MPC: a versatile platform to construct a recycle antibacterial and antifouling surface. J Mater Chem B 2015; 3:5501-5510. [PMID: 32262521 DOI: 10.1039/c5tb00597c] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A new kind of bio-inspired terpolymer was synthesized by a conventional free radical terpolymerization of dopamine methacrylamide (DMA), 2-(dimethylamino)-ethyl methacrylate (DMAEMA) and 2-methacryloyloxyethyl phosphorylcholine (MPC) with azobisisobutyronitrile (AIBN) as an initiator. DMA consists of a biomimetic adhesive side chain covalently linked to a polymerizable methacrylate monomer. 1H NMR and gel permeation chromatography confirmed the successful synthesis of P(DMA-co-MPC-co-DMAEMA). The terpolymer could self-assemble on the macroscopic planar substrates with DMA as an anchor. After being quaternized by 1-bromo-heptane, terpolymers of P(DMA-co-MPC-co-DMAEMA+) with bactericidal function were obtained. The self-assembly terpolymer on the substrate was confirmed by X-ray photoelectron spectroscopy, water contact angle, spectroscopic ellipsometry and atomic force microscopy. The hydrophilicity and antifouling properties of the self-assembly coating increased greatly against bacteria, protein and cells with the increase of MPC content. As the existence of bactericidal cations for electrostatic targeting of bacteria as well as membrane lysis, the terpolymer coating showed excellent bactericidal function against E. coli and S. aureus. Biofilm inhibition assay showed that terpolymer coating was very efficient to resist bacterial adhesion and biofilm formation in a nutrient environment. Bacteria could be continuously "captured" and killed by the terpolymer coating, and then bacteria corpse was released into the solution. Importantly, this work provides a versatile strategy for the fabrication of a recycle antibacterial and antifouling surface to modify biomaterials.
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Affiliation(s)
- B L Wang
- School of Ophthalmology & Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.
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17
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Atmospheric pressure nonthermal plasmas for bacterial biofilm prevention and eradication. Biointerphases 2015; 10:029404. [PMID: 25869456 DOI: 10.1116/1.4914382] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Biofilms are three-dimensional structures formed by surface-attached microorganisms and their extracellular products. Biofilms formed by pathogenic microorganisms play an important role in human diseases. Higher resistance to antimicrobial agents and changes in microbial physiology make treating biofilm infections very complex. Atmospheric pressure nonthermal plasmas (NTPs) are a novel and powerful tool for antimicrobial treatment. The microbicidal activity of NTPs has an unspecific character due to the synergetic actions of bioactive components of the plasma torch, including charged particles, reactive species, and UV radiation. This review focuses on specific traits of biofilms, their role in human diseases, and those effects of NTP that are helpful for treating biofilm infections. The authors discuss NTP-based strategies for biofilm control, such as surface modifications to prevent bacterial adhesion, killing bacteria in biofilms, and biofilm destruction with NTPs. The unspecific character of microbicidal activity, proven polymer modification and destruction abilities, low toxicity for human tissues and absence of long-living toxic compounds make NTPs a very promising tool for biofilm prevention and control.
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18
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Cold atmospheric plasma in combination with mechanical treatment improves osteoblast growth on biofilm covered titanium discs. Biomaterials 2015; 52:327-34. [DOI: 10.1016/j.biomaterials.2015.02.035] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 01/30/2015] [Accepted: 02/06/2015] [Indexed: 01/06/2023]
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Traba C, Liang JF. The inactivation of Staphylococcus aureus biofilms using low-power argon plasma in a layer-by-layer approach. BIOFOULING 2015; 31:39-48. [PMID: 25569189 PMCID: PMC4295521 DOI: 10.1080/08927014.2014.995643] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The direct application of low power argon plasma for the decontamination of pre-formed Staphylococcus aureus biofilms on various surfaces was examined. Distinct chemical/physical properties of reactive species found in argon plasmas generated at different wattages all demonstrated very potent but very different anti-biofilm mechanisms of action. An in-depth analysis of the results showed that: (1) the different reactive species produced in each plasma demonstrated specific antibacterial and/or anti-biofilm activity; and (2) the commonly associated etching effect could be manipulated and even controlled, depending on the experimental conditions. Under optimal experimental parameters, bacterial cells in S. aureus biofilms were killed (> 99.9%) by plasmas within 10 min of exposure and no bacteria nor biofilm regrowth from argon discharge gas treated biofilms was observed for 150 h. The decontamination ability of plasmas for the treatment of biofilm related contaminations on various materials was confirmed and an entirely novel layer-by-layer decontamination approach was designed and examined.
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Affiliation(s)
| | - Jun F. Liang
- Correspondence author: Dr Jun F. (James) Liang, Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, NJ 07030, USA, Tel.: 201-216-5640; Fax: 201-216-8240,
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Mai-Prochnow A, Murphy AB, McLean KM, Kong MG, Ostrikov KK. Atmospheric pressure plasmas: infection control and bacterial responses. Int J Antimicrob Agents 2014; 43:508-17. [PMID: 24637224 DOI: 10.1016/j.ijantimicag.2014.01.025] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 01/25/2014] [Accepted: 01/27/2014] [Indexed: 12/26/2022]
Abstract
Cold atmospheric pressure plasma (APP) is a recent, cutting-edge antimicrobial treatment. It has the potential to be used as an alternative to traditional treatments such as antibiotics and as a promoter of wound healing, making it a promising tool in a range of biomedical applications with particular importance for combating infections. A number of studies show very promising results for APP-mediated killing of bacteria, including removal of biofilms of pathogenic bacteria such as Pseudomonas aeruginosa. However, the mode of action of APP and the resulting bacterial response are not fully understood. Use of a variety of different plasma-generating devices, different types of plasma gases and different treatment modes makes it challenging to show reproducibility and transferability of results. This review considers some important studies in which APP was used as an antibacterial agent, and specifically those that elucidate its mode of action, with the aim of identifying common bacterial responses to APP exposure. The review has a particular emphasis on mechanisms of interactions of bacterial biofilms with APP.
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Affiliation(s)
- Anne Mai-Prochnow
- CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW 2070, Australia.
| | - Anthony B Murphy
- CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Keith M McLean
- CSIRO Materials Science and Engineering, Bayview Avenue, Clayton, VIC 3168, Australia
| | - Michael G Kong
- Frank Reidy Research Center for Bioelectrics, Old Dominion University, Suite 422, 4211 Monarch Way, Norfolk, VA 23529, USA
| | - Kostya Ken Ostrikov
- CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW 2070, Australia
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