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Kang SU, Kim HJ, Ma S, Oh DY, Jang JY, Seo C, Lee YS, Kim CH. Liquid plasma promotes angiogenesis through upregulation of endothelial nitric oxide synthase-induced extracellular matrix metabolism: potential applications of liquid plasma for vascular injuries. Cell Commun Signal 2024; 22:138. [PMID: 38374138 PMCID: PMC10875778 DOI: 10.1186/s12964-023-01412-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 11/25/2023] [Indexed: 02/21/2024] Open
Abstract
BACKGROUND Applications of nonthermal plasma have expanded beyond the biomedical field to include antibacterial, anti-inflammatory, wound healing, and tissue regeneration. Plasma enhances epithelial cell repair; however, the potential damage to deep tissues and vascular structures remains under investigation. RESULT This study assessed whether liquid plasma (LP) increased nitric oxide (NO) production in human umbilical vein endothelial cells by modulating endothelial NO synthase (eNOS) phosphorylation and potential signaling pathways. First, we developed a liquid plasma product and confirmed the angiogenic effect of LP using the Matrigel plug assay. We found that the NO content increased in plasma-treated water. NO in plasma-treated water promoted cell migration and angiogenesis in scratch and tube formation assays via vascular endothelial growth factor mRNA expression. In addition to endothelial cell proliferation and migration, LP influenced extracellular matrix metabolism and matrix metalloproteinase activity. These effects were abolished by treatment with NG-L-monomethyl arginine, a specific inhibitor of NO synthase. Furthermore, we investigated the signaling pathways mediating the phosphorylation and activation of eNOS in LP-treated cells and the role of LKB1-adenosine monophosphate-activated protein kinase in signaling. Downregulation of adenosine monophosphate-activated protein kinase by siRNA partially inhibited LP-induced eNOS phosphorylation, angiogenesis, and migration. CONCLUSION The present study suggests that LP treatment may be a novel strategy for promoting angiogenesis in vascular damage. Video Abstract.
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Affiliation(s)
- Sung Un Kang
- Department of Otolaryngology, Department of Molecular Science and Technology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-Gu, Suwon, 443-380, Republic of Korea
| | - Haeng Jun Kim
- Department of Otolaryngology, Department of Molecular Science and Technology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-Gu, Suwon, 443-380, Republic of Korea
| | - Sukhwal Ma
- Medical Accelerator Research Team, Korea Institute of Radiological & Medical Sciences (KIRAMS), 75 Nowonro, Nowon-gu, Seoul, 01812, South Korea
| | - Doo-Yi Oh
- Department of Otolaryngology, Department of Molecular Science and Technology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-Gu, Suwon, 443-380, Republic of Korea
| | - Jeon Yeob Jang
- Department of Otolaryngology, Department of Molecular Science and Technology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-Gu, Suwon, 443-380, Republic of Korea
| | - Chorong Seo
- Department of Otolaryngology, Department of Molecular Science and Technology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-Gu, Suwon, 443-380, Republic of Korea
| | - Yun Sang Lee
- Department of Otolaryngology, Department of Molecular Science and Technology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-Gu, Suwon, 443-380, Republic of Korea
| | - Chul-Ho Kim
- Department of Otolaryngology, Department of Molecular Science and Technology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-Gu, Suwon, 443-380, Republic of Korea.
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Maillet C, Klein FM, Le Bras F, Velard F, Guillaume C, Gangloff SC, Gelle MP. Cytocompatibility of titanium and poly(etheretherketone) surfaces after O2 non-thermal plasma sterilization. PLoS One 2023; 18:e0290820. [PMID: 37647324 PMCID: PMC10468041 DOI: 10.1371/journal.pone.0290820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 08/16/2023] [Indexed: 09/01/2023] Open
Abstract
The sterilization of medical devices is paramount to achieve an acceptable level of sterility assurance and to prevent hospital-acquired infections. However, some medical devices cannot be sterilized by usual processes such as autoclave (AC) and gamma-ray irradiation (GI). A new non-thermal plasma (NTP) process using sealed bag that preserves the sterile state of the devices could be used as an alternative sterilization method. The aim of the study was to assess the cytocompatibility of titanium and poly(etheretherketone) (PEEK) surfaces after O2-NTP sterilization compared to GI and AC. MG-63 osteoblast-like cells were seeded on titanium (TA6V) and PEEK disks sterilized by AC, GI and O2-NTP. The cells' viability and proliferation, determined by WST-1 and DNA quantification respectively, were enhanced whatever the material types from 3 to 10 days. When seeded on titanium, MG-63 cells showed a higher viability and proliferation after GI and O2-NTP treatment compared to AC treatment. When cultured on PEEK, MG-63 cells showed a higher viability after O2-NTP treatment. No difference of proliferation was observed whatever the sterilization processes. The cell colonization of the materials' surface was confirmed by scanning electron microscopy. Lactate dehydrogenase (LDH) assay revealed no cytotoxicity. Thus, O2-NTP led to similar cell responses to AC and GI and could be a cost-effective alternative process to the usual sterilization methods for fragile medical devices.
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Affiliation(s)
- Christina Maillet
- BIOS EA 4691, Biomatériaux et Inflammation en Site Osseux, SFR CAP Santé, FED 4231, Université de Reims Champagne Ardenne, Reims, France
- UFR Odontologie, Université de Reims Champagne Ardenne, Reims, France
- Pôle de Médecine Bucco-Dentaire, Centre Hospitalier Universitaire de Reims, Reims, France
| | | | - Florian Le Bras
- BIOS EA 4691, Biomatériaux et Inflammation en Site Osseux, SFR CAP Santé, FED 4231, Université de Reims Champagne Ardenne, Reims, France
| | - Frederic Velard
- BIOS EA 4691, Biomatériaux et Inflammation en Site Osseux, SFR CAP Santé, FED 4231, Université de Reims Champagne Ardenne, Reims, France
| | - Christine Guillaume
- BIOS EA 4691, Biomatériaux et Inflammation en Site Osseux, SFR CAP Santé, FED 4231, Université de Reims Champagne Ardenne, Reims, France
| | - Sophie C. Gangloff
- BIOS EA 4691, Biomatériaux et Inflammation en Site Osseux, SFR CAP Santé, FED 4231, Université de Reims Champagne Ardenne, Reims, France
- UFR Pharmacie, Université de Reims Champagne Ardenne, Reims, France
| | - Marie-Paule Gelle
- BIOS EA 4691, Biomatériaux et Inflammation en Site Osseux, SFR CAP Santé, FED 4231, Université de Reims Champagne Ardenne, Reims, France
- UFR Odontologie, Université de Reims Champagne Ardenne, Reims, France
- Pôle de Médecine Bucco-Dentaire, Centre Hospitalier Universitaire de Reims, Reims, France
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Zhang J, Jia Y, Lv X, Xiong T, Su J, Huang Y, Shen K. Synergistic graphene-MnOx/honeycomb activated carbon (G-MnOx/HAC) and plasma technology for eradication of pathogenic microorganisms. Front Chem 2023; 11:1207947. [PMID: 37601903 PMCID: PMC10433192 DOI: 10.3389/fchem.2023.1207947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 07/24/2023] [Indexed: 08/22/2023] Open
Abstract
This paper addresses the risk for environmental transmission of pathogenic microorganisms in confined spaces and the serious health hazards for personnel, and research on efficient eradication methods for the pathogenic microorganisms was carried out to provide technical support for ensuring the health of personnel in confined spaces. A series of graphene-MnO2 (G-MnO2) catalytic materials was prepared by hydrothermal and precipitation methods, and processing parameters such as the graphene doping method, the raw material ratio and the plasma action time were optimized. It was shown that G-MnOX-P/HAC prepared by a one-step precipitation method and with a graphene doping ratio of 10% had the best bactericidal effect in a dielectric barrier discharge (DBD) reactor after 4 min of reaction. The eradication rates for Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), coronavirus and Aspergillus niger were all greater than 99.9%. The characterization techniques TEM, SEM, XRD, XPS, BET and FT-IR showed that the G-MnOX-P samples prepared by the one-step precipitation method had larger specific surface areas with more oxygen vacancies and functional groups on the surfaces, which was conducive to decomposition of the ozone generated by the dissociated plasma and formation of reactive oxygen species (ROS) for the microbial eradication process. Finally, by comparing the ozone-decomposition activity with the plasma co-catalytic performance, it was verified that efficient decomposition of the ozone facilitated the eradication of microorganisms. Based on this, an analysis of the mechanism for efficient eradication was carried out.
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Affiliation(s)
- Jiqing Zhang
- College of Missile Engineering, Rocket Force University of Engineering, Xi’an, China
| | - Ying Jia
- College of Missile Engineering, Rocket Force University of Engineering, Xi’an, China
| | - Xiaomeng Lv
- College of Missile Engineering, Rocket Force University of Engineering, Xi’an, China
| | - Tiedan Xiong
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai, China
| | - Jun Su
- College of Missile Engineering, Rocket Force University of Engineering, Xi’an, China
| | - Yuanzheng Huang
- College of Missile Engineering, Rocket Force University of Engineering, Xi’an, China
| | - Keke Shen
- College of Missile Engineering, Rocket Force University of Engineering, Xi’an, China
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4
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Cold plasma as a pre-treatment for processing improvement in food: A review. Food Res Int 2023; 167:112663. [PMID: 37087253 DOI: 10.1016/j.foodres.2023.112663] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/13/2023] [Accepted: 03/05/2023] [Indexed: 03/17/2023]
Abstract
Thermal processes can be very damaging to the nutritional and sensory quality of foods. Non-thermal technologies have been applied to reduce the impact of heat on food, reducing processing time and increasing its efficiency. Among many non-thermal technologies, cold plasma is an emerging technology with several potential applications in food processing. This technique can be used to preserve and sanitize food products, and act as a pre-treatment for drying, extraction, cooking, curing, and hydrogenation of foods. Furthermore, the reacting plasma species formed during the plasma application can change positively the sensory and nutritional aspects of foods. The aim of this review is to analyze the main findings on the application of cold plasma as a pre-treatment technology to improve food processing. In its current maturity stage, the cold plasma technology is suitable for reducing drying time, increasing extraction efficiency, as well as curing meats. This technology can convert unsaturated into saturated fats, without forming trans isomers, which can be an alternative to healthier foods. Although many advantages come from cold plasma applications, this technology still has several challenges, such as the scaling up, especially in increasing productivity and treating foods with large formats. Optimization and control of the effects of plasma on nutritional and sensory quality are still under investigation. Further improvement of the technology will come with a higher knowledge of the effects of plasma on the different chemical groups present in foods, and with the development of bigger or more powerful plasma systems.
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5
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Nonthermal Food Processing: A Step Towards a Circular Economy to Meet the Sustainable Development Goals. Food Chem X 2022; 16:100516. [DOI: 10.1016/j.fochx.2022.100516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 10/24/2022] [Accepted: 11/16/2022] [Indexed: 11/18/2022] Open
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6
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Combined Effects of Doxorubicin, Medroxyprogesterone Acetate, and Cold-Plasma-Treated Hanks Solution on the Production of Transforming Growth Factor β in Human Mononuclear Leukocytes. Pharm Chem J 2022. [DOI: 10.1007/s11094-022-02679-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Zhao Y, Shao L, Jia L, Zou B, Dai R, Li X, Jia F. Inactivation effects, kinetics and mechanisms of air- and nitrogen-based cold atmospheric plasma on Pseudomonas aeruginosa. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103051] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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8
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Optimal Discharge Parameters for Biomedical Surface Sterilization in Radiofrequency AR/O2 Plasma. ENERGIES 2022. [DOI: 10.3390/en15041589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Plasma parameters of radiofrequency discharge generated at low pressures in an argon-oxygen mixture addressed for biomedical surface sterilization have been optimized. Numerical results illustrate the density distributions of different species and electron temperatures during the electrical discharge process. The current discharge acting in the abnormal range decreases at higher oxygen gas flow rates. The temperature of electrons drops with pressure while it rises by adding oxygen. Nevertheless, electron density displays an adverse trend, exhibited by the electron’s temperature. The average particle density of the reactive species is enhanced in Ar/O2 compared to He/O2, which ensures a better efficiency of Ar/O2 in sterilizing bacteria than He/O2. The impact of oxygen addition on the discharge mixture reveals raised oxygen atom density and a reduction in metastable oxygen atoms. A pronounced production of oxygen atoms is achieved at higher frequency domains. This makes our findings promising for biomedical surface sterilization and leads to optimal parameter discharges used for sterilization being at 30% of oxygen gas ratio and 0.3 Torr pressure.
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Katsigiannis AS, Bayliss DL, Walsh JL. Cold plasma for the disinfection of industrial food‐contact surfaces: An overview of current status and opportunities. Compr Rev Food Sci Food Saf 2022; 21:1086-1124. [DOI: 10.1111/1541-4337.12885] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/26/2021] [Accepted: 11/16/2021] [Indexed: 12/14/2022]
Affiliation(s)
| | - Danny L. Bayliss
- Processing & Production Research Department Campden BRI Gloucestershire UK
| | - James L. Walsh
- Department of Electrical Engineering & Electronics University of Liverpool Liverpool UK
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10
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Lata S, Chakravorty S, Mitra T, Pradhan PK, Mohanty S, Patel P, Jha E, Panda PK, Verma SK, Suar M. Aurora Borealis in dentistry: The applications of cold plasma in biomedicine. Mater Today Bio 2022; 13:100200. [PMID: 35036896 PMCID: PMC8743205 DOI: 10.1016/j.mtbio.2021.100200] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/22/2021] [Accepted: 12/29/2021] [Indexed: 01/11/2023] Open
Abstract
Plasma is regularly alluded to as the fourth form of matter. Its bounty presence in nature along with its potential antibacterial properties has made it a widely utilized disinfectant in clinical sciences. Thermal plasma and non-thermal (or cold atmospheric) plasma (NTP) are two types of plasma. Atoms and heavy particles are both available at the same temperature in thermal plasma. Cold atmospheric plasma (CAP) is intended to be non-thermal since its electrons are hotter than the heavier particles at ambient temperature. Direct barrier discharge (DBD), atmospheric plasma pressure jet (APPJ), etc. methods can be used to produce plasma, however, all follow a basic concept in their generation. This review focuses on the anticipated uses of cold atmospheric plasma in dentistry, such as its effectiveness in sterilizing dental instruments by eradicating bacteria, its advantage in dental cavity decontamination over conventional methods, root canal disinfection, its effects on tooth whitening, the benefits of plasma treatment on the success of dental implant placement, and so forth. Moreover, the limitations and probable solutions has also been anticipated. These conceivable outcomes thus have proclaimed the improvement of more up-to-date gadgets, for example, the plasma needle and plasma pen, which are efficient in treating the small areas like root canal bleaching, biofilm disruption, requiring treatment in dentistry. Non-thermal plasma (NTP) has regarded as an important tool for biomedical application especially dental application. The surface application of NTP can be used for disinfecting microbial infection in endodontic issues. NTP can be used to eradicate the microorganism biofilm responsible for dental caries. NTP can also be utilized in would healing, implant modifications and adhesive restoration. NTP is potential candidate for clinical application in dentistry based on the experimental proofs.
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Affiliation(s)
- S Lata
- Kalinga Institute of Dental Sciences, Department of Conservative Dentistry and Endodontics, KIIT University, Bhubaneswar, 751024, India
| | - Shibani Chakravorty
- Kalinga Institute of Dental Sciences, Department of Conservative Dentistry and Endodontics, KIIT University, Bhubaneswar, 751024, India
| | - Tamoghni Mitra
- School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Prasanti Kumari Pradhan
- Kalinga Institute of Dental Sciences, Department of Conservative Dentistry and Endodontics, KIIT University, Bhubaneswar, 751024, India
| | - Soumyakanta Mohanty
- Department of Conservative Dentistry and Endodontics, SCB Dental College and Hospital, Cuttack, 753007, India
| | - Paritosh Patel
- School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Ealisha Jha
- School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
| | - Pritam Kumar Panda
- Condensed Matter Theory Group, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
| | - Suresh K Verma
- School of Biotechnology, KIIT University, Bhubaneswar, 751024, India.,Condensed Matter Theory Group, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
| | - Mrutyunjay Suar
- School of Biotechnology, KIIT University, Bhubaneswar, 751024, India
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Asimakopoulou E, Εkonomou SΙ, Papakonstantinou P, Doran O, Stratakos AC. Inhibition of corrosion causing Pseudomonas aeruginosa using plasma-activated water. J Appl Microbiol 2021; 132:2781-2794. [PMID: 34846774 DOI: 10.1111/jam.15391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/24/2021] [Accepted: 11/28/2021] [Indexed: 12/28/2022]
Abstract
AIMS The cost of Microbiologically Influenced Corrosion (MIC) significantly affects a wide range of sectors. This study aims to assess the efficiency of a novel technology based on the use of plasma-activated water (PAW) in inhibiting corrosion caused by bacteria. METHODS AND RESULTS This study evaluated the effectiveness of PAW, produced by a plasma bubble reactor, in reducing corrosion causing Pseudomonas aeruginosa planktonic cells in tap water and biofilms were grown onto stainless steel (SS) coupons. Planktonic cells and biofilms were treated with PAW at different discharge frequencies (500-1500 Hz) and exposure times (0-20 min). P. aeruginosa cells in tap water were significantly reduced after treatment, with higher exposure times and discharge frequencies achieving higher reductions. Also, PAW treatment led to a gradual reduction for young and mature biofilms, achieving >4-Log reductions after 20 min. Results were also used to develop two predictive inactivation models. CONCLUSIONS This work presents evidence that PAW can be used to inactivate both planktonic cells and biofilms of P. aeruginosa. Experimental and theoretical results also demonstrate that reduction is dependent on discharge frequency and exposure time. SIGNIFICANCE AND IMPACT OF THE STUDY This work demonstrates the potential of using PAW as means to control MIC.
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Affiliation(s)
| | - Sotiriοs Ι Εkonomou
- Faculty of Health and Applied Sciences (HAS), Centre for Research in Biosciences, University of the West of England, Bristol, UK
| | | | - Olena Doran
- Faculty of Health and Applied Sciences (HAS), University of the West of England, Coldharbour Ln, Bristol, UK
| | - Alexandros Ch Stratakos
- Centre for Research in Biosciences, Faculty of Health and Applied Sciences (HAS), University of the West of England, Bristol, UK
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Inactivation of Enveloped Bovine Viral Diarrhea Virus and Non-Enveloped Porcine Parvovirus Using Low-Pressure Non-Thermal Plasma. Life (Basel) 2021; 11:life11121292. [PMID: 34947823 PMCID: PMC8706422 DOI: 10.3390/life11121292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/10/2021] [Accepted: 11/22/2021] [Indexed: 11/17/2022] Open
Abstract
As the worldwide population has been experiencing since 2020, viruses represent a serious threat to global well-being. To avoid viral transmission through surgery or medical examination, sterilization of medical material is needed. From emerging sterilization processes, the use of non-thermal plasma (NTP) arises as a promising technique to efficiently reduce microbial burden on medical devices, including new complex polymers as thermosensitive ones. Thus, we evaluated the antiviral efficacy of a low-pressure NTP process taking place in a sealed bag. For this purpose, two different plasmas, O2 100% plasma and Ar 80%-O2 20% plasma, were tested against two viruses: the bovine viral diarrhea virus and the porcine parvovirus, surrogates of human hepatitis C virus and human parvovirus B19, respectively. The efficacy of both NTP treatments on viral load can be detected after only five minutes. Moreover, the longer the NTP treatments last, the more the load decreases. The most effective load reduction was obtained with a 120-min O2 plasma treatment inducing a minimum of four-log viral load reduction. So, this process demonstrated strong virucidal capacity inside a sealed bag and represents a very interesting opportunity in the field of fragile medical devices sterilization or disinfection.
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Anti-Bacterial Action of Plasma Multi-Jets in the Context of Chronic Wound Healing. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11209598] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This work is a contribution to the development and implementation of non-thermal plasma technology for decontamination in the perspective of nosocomial and chronic wound innovative therapies. Multi jets devices based on Plasma Gun® technology in static and scanning operation modes and bacterial lawns inoculated with resistant and non-resistant bacterial strains were designed and used. A pilot toxicity study exploring plasma treatment of wound bearing patients, performed with a low voltage plasma applicator, is documented as a first step for the translation of in vitro experiments to clinical care. Bacterial inactivation was demonstrated for Staphylococcus aureus, Pseudomonas aeruginosa and drug resistant S. aureus, P. aeruginosa and Escherichia Coli strains collected from patient wounds at Orleans (France) hospital. A few square centimeter large contaminated samples were inactivated following a single plasma exposure as short as one minute. Samples inoculated with a single but also a mix of three resistant pathogens were successfully inactivated not only right after their contamination but for mature lawns as well. Similar bactericidal action was demonstrated for antibiotic-resistant and non-resistant P. aeruginosa. The time exposure dependent increase of the inhibition spots, following multi jets exposure, is discussed as either the accumulation of reactive species or the likely combinatory action of both the reactive species and transient electric field delivery on inoculated samples.
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Baek KH, Kim HJ, Kang T, Lee YE, Kim DK, Kang DH, Jo C. Blue light promotes bactericidal action of plasma-activated water against Staphylococcus aureus on stainless steel surfaces. INNOV FOOD SCI EMERG 2021. [DOI: 10.1016/j.ifset.2021.102663] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Abstract
Nonthermal atmospheric pressure biocompatible plasma (NBP), alternatively called bio-cold plasma, is a partially ionized gas that consists of charged particles, neutral atoms and molecules, photons, an electric field, and heat. Recently, nonthermal plasma-based technology has been applied to bioscience, medicine, agriculture, food processing, and safety. Various plasma device configurations and electrode layouts has fast-tracked plasma applications in the treatment of biological and material surfaces. The NBP action mechanism may be related to the synergy of plasma constituents, such as ultraviolet radiation or a reactive species. Recently, plasma has been used in the inactivation of viruses and resistant microbes, such as fungal cells, bacteria, spores, and biofilms made by microbes. It has also been used to heal wounds, coagulate blood, degrade pollutants, functionalize material surfaces, kill cancers, and for dental applications. This review provides an outline of NBP devices and their applications in bioscience and medicine. We also discuss the role of plasma-activated liquids in biological applications, such as cancer treatments and agriculture. The individual adaptation of plasma to meet specific medical requirements necessitates real-time monitoring of both the plasma performance and the target that is treated and will provide a new paradigm of plasma-based therapeutic clinical systems.
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Affiliation(s)
- Eun H. Choi
- Plasma Bioscience Research Center/Applied Plasma Medicine Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 01897 Republic of Korea
| | - Han S. Uhm
- Canode # 702, 136-11 Tojeong-ro, Mapo-gu, Seoul, 04081 Republic of Korea
| | - Nagendra K. Kaushik
- Plasma Bioscience Research Center/Applied Plasma Medicine Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 01897 Republic of Korea
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Umair M, Jabbar S, Ayub Z, Muhammad Aadil R, Abid M, Zhang J, Liqing Z. Recent Advances in Plasma Technology: Influence of Atmospheric Cold Plasma on Spore Inactivation. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1888972] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Muhammad Umair
- Department of Food Science and Engineering, College of Chemistry and Engineering, Shenzhen University, Shenzhen, Guangdong, PR China
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
| | - Saqib Jabbar
- Food Science Research Institute (FSRI), National Agricultural Research Centre (NARC), Islamabad, Pakistan
| | - Zubaria Ayub
- Institute of Home Sciences, University of Agriculture, Faisalabad, Pakistan
| | - Rana Muhammad Aadil
- National Institute of Food Science and Technology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Muhammad Abid
- Institute of Food and Nutritional Sciences, Pir Mehr Ali Shah, Arid Agriculture University Rawalpindi, Pakistan
| | - Jianhao Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
| | - Zhao Liqing
- Department of Food Science and Engineering, College of Chemistry and Engineering, Shenzhen University, Shenzhen, Guangdong, PR China
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17
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Akter M, Yadav DK, Ki SH, Choi EH, Han I. Inactivation of Infectious Bacteria Using Nonthermal Biocompatible Plasma Cabinet Sterilizer. Int J Mol Sci 2020; 21:ijms21218321. [PMID: 33171928 PMCID: PMC7664273 DOI: 10.3390/ijms21218321] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/30/2020] [Accepted: 10/30/2020] [Indexed: 11/29/2022] Open
Abstract
Nonthermal, biocompatible plasma (NBP) is a promising unique state of matter that is effective against a wide range of pathogenic microorganisms. This study focused on a sterilization method for bacteria that used the dielectric barrier discharge (DBD) biocompatible plasma cabinet sterilizer as an ozone generator. Reactive oxygen species play a key role in inactivation when air or other oxygen-containing gases are used. Compared with the untreated control, Escherichia coli(E. coli), Staphylococcus aureus (S. aureus), and Salmonella typhimurium (sepsis) were inhibited by approximately 99%, or were nondetectable following plasma treatment. Two kinds of plasma sterilizers containing six- or three-chamber cabinets were evaluated. There was no noticeable difference between the two configurations in the inactivation of microorganisms. Both cabinet configurations were shown to be able to reduce microbes dramatically, i.e., to the nondetectable range. Therefore, our data indicate that the biocompatible plasma cabinet sterilizer may prove to be an appropriate alternative sterilization procedure.
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Affiliation(s)
- Mahmuda Akter
- Department of Plasma Bio-Display, Kwangwoon University, Seoul 01897, Korea;
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
| | - Dharmendra Kumar Yadav
- Department of Pharmacy, College of Pharmacy, Gachon University of Medicine and Science, Incheon City 21924, Korea;
| | - Se Hoon Ki
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
- Department of Electronic and Biological Physics, Kwangwoon University, Seoul 01897, Korea
| | - Eun Ha Choi
- Department of Plasma Bio-Display, Kwangwoon University, Seoul 01897, Korea;
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
- Department of Electronic and Biological Physics, Kwangwoon University, Seoul 01897, Korea
- Correspondence: (E.H.C.); (I.H.)
| | - Ihn Han
- Department of Plasma Bio-Display, Kwangwoon University, Seoul 01897, Korea;
- Plasma Bioscience Research Center, Applied Plasma Medicine Center, Kwangwoon University, Seoul 01897, Korea;
- Correspondence: (E.H.C.); (I.H.)
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18
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Bao Y, Reddivari L, Huang JY. Enhancement of phenolic compounds extraction from grape pomace by high voltage atmospheric cold plasma. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109970] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Development of cold plasma pretreatment for improving phenolics extractability from tomato pomace. INNOV FOOD SCI EMERG 2020. [DOI: 10.1016/j.ifset.2020.102445] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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20
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Chen Y, Chen Y, Chung W, Tong B, Chang MB. Evaluation of the effectiveness of nonthermal plasma disinfection. ENVIRONMENTAL TECHNOLOGY 2020; 41:2795-2805. [PMID: 30758245 DOI: 10.1080/09593330.2019.1583289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 02/03/2019] [Indexed: 06/09/2023]
Abstract
As concern has increased regarding the interaction between efficiency and safety of disinfection, plasma becomes a viable alternative for disinfection in comparison with traditional methods. Dielectric barrier discharge (DBD) is applied to deactivate Bacillus subtilis and Escherichia coli , respectively, and disinfection efficiency is experimentally evaluated in this study. Tests are conducted with different working gases to investigate their effects on disinfection. Results show that Ar plasma diluted with 25% O2 enhances the germicidal effects to5.9 and 6.9 (log reduction) for B. subtilis and E. coli, respectively, and OES results show that active Ar and O species play important roles to weaken cell wall of microbes and further disinfect E. coli and B. subtilis. Analysis of protein and total sugar release indicates that active species such as ozone, NO and Ar* produced by plasma result in hydrolysis of the cell. In the meantime, charged particles produced by plasma would affect the amount of sugar released, resulting in different germicidal effects. Overall, plasma can disinfect microorganisms mainly via the generation of oxidising agents including ozone, NO and UV with a comparatively short treatment period, which is typically less than 5 min.
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Affiliation(s)
- YuJung Chen
- Graduate Institute of Environmental Engineering, National Central University, Jhongli, Taoyuan, Taiwan
| | - YungChih Chen
- Physics Division, Institute of Nuclear Energy Research, Longtan, Taoyuan, Taiwan
| | - WeiChieh Chung
- Graduate Institute of Environmental Engineering, National Central University, Jhongli, Taoyuan, Taiwan
| | - BaoShun Tong
- Graduate Institute of Environmental Engineering, National Central University, Jhongli, Taoyuan, Taiwan
| | - Moo Been Chang
- Graduate Institute of Environmental Engineering, National Central University, Jhongli, Taoyuan, Taiwan
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21
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Surface Disinfection to Protect against Microorganisms: Overview of Traditional Methods and Issues of Emergent Nanotechnologies. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10176040] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Sterilization methods for individuals and facilities are extremely important to enable human beings to continue the basic tasks of life and to enable safe and continuous interaction of citizens in society when outbreaks of viral pandemics such as the coronavirus. Sterilization methods, their availability in gatherings, and the efficiency of their work are among the important means to contain the spread of viruses and epidemics and enable societies to practice their activities almost naturally. Despite the effective solutions given by traditional methods of surface disinfection, modern nanotechnology has proven to be an emergent innovation to protect against viruses. On this note, recent scientific breakthroughs have highlighted the ability of nanospray technology to attach to air atoms in terms of size and time-period of existence as a sterilizer for renewed air in large areas for human gatherings. Despite the ability of this method to control the outbreak of infections, the mutation of bactericidal mechanisms presents a great issue for scientists. In recent years, science has explored a more performant approach and techniques based on a surface-resistance concept. The most emergent is the self-defensive antimicrobial known as the self-disinfection surface. It consists of the creation of a bacteria cell wall to resist the adhesion of bacteria or to kill bacteria by chemical or physical changes. Besides, plasma-mediated virus inactivation was shown as a clean, effective, and human healthy solution for surface disinfection. The purpose of this article is to deepen the discussion on the threat of traditional methods of surface disinfection and to assess the state of the art and potential solutions using emergent nanotechnology.
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22
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Abstract
Over the years, ever more stringent requirements on the pollutant emissions, especially NOX, from combustion systems burning natural gas are introduced by the European Union (EU). Among all NOX reduction methods, the flue gas treatment by plasma is widely applied and could be used for both small scale and domestic combustion systems. However, the removal efficiency depends on concentrations of oxygen, water vapor, traces of hydrocarbons, and nitrogen oxides in flue gas. In order to analyze the application of the NOX reduction for small-scale or domestic combustion systems, experiments of NOX reduction by non-thermal plasma from real flue gases originating from premixed methane combustion at different equivalence ratio (ER) values were performed. It was determined that the residual oxygen in flue gas plays an important role for improvement of NO to NO2 oxidation efficiency when O2 concentrations are equal to or higher than 6%. The power consumption for the plasma oxidation constituted approximately 1% of the burner power. In the case of ozone treatment, the addition of O3 to flue gas showed even more promising results as NO formed during combustion was fully oxidized to NO2 at all ER values.
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23
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Kwon T, Chandimali N, Lee DH, Son Y, Yoon SB, Lee JR, Lee S, Kim KJ, Lee SY, Kim SY, Jo YJ, Kim M, Park BJ, Lee JK, Jeong DK, Kim JS. Potential Applications of Non-thermal Plasma in Animal Husbandry to Improve Infrastructure. In Vivo 2019; 33:999-1010. [PMID: 31280188 DOI: 10.21873/invivo.11569] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 12/28/2022]
Abstract
Infrastructure in animal husbandry refers to fundamental facilities and services necessary for better living conditions of animals and its economy to function through better productivity. Mainly, infrastructure can be divided into two categories: hard infrastructure and soft infrastructure. Physical infrastructure, such as buildings, roads, and water supplying systems, belongs to hard infrastructure. Soft infrastructure includes services which are required to maintain economic, health, cultural and social standards of animal husbandry. Therefore, the proper management of infrastructure in animal husbandry is necessary for animal welfare and its economy. Among various technologies to improve the quality of infrastructure, non-thermal plasma (NTP) technology is an effectively applicable technology in different stages of animal husbandry. NTP is mainly helpful in maintaining better health conditions of animals in several ways via decontamination from microorganisms present in air, water, food, instruments and surfaces of animal farming systems. Furthermore, NTP is used in the treatment of waste water, vaccine production, wound healing in animals, odor-free ventilation, and packaging of animal food or animal products. This review summarizes the recent studies of NTP which can be related to the infrastructure in animal husbandry.
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Affiliation(s)
- Taeho Kwon
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Nisansala Chandimali
- Immunotherapy Convergence Research Center,Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea.,Laboratory of Animal Genetic Engineering and Stem Cell Biology, Advanced Convergence Technology & Science, Jeju National University, Jeju, Republic of Korea
| | - Dong-Ho Lee
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Yeonghoon Son
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Seung-Bin Yoon
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Ja-Rang Lee
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Sangil Lee
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Ki Jin Kim
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Sang-Yong Lee
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Se-Yong Kim
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Yu-Jin Jo
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Minseong Kim
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Byoung-Jin Park
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Jun-Ki Lee
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
| | - Dong Kee Jeong
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Advanced Convergence Technology & Science, Jeju National University, Jeju, Republic of Korea
| | - Ji-Su Kim
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeonbuk, Republic of Korea
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24
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Smolková B, Uzhytchak M, Lynnyk A, Kubinová Š, Dejneka A, Lunov O. A Critical Review on Selected External Physical Cues and Modulation of Cell Behavior: Magnetic Nanoparticles, Non-thermal Plasma and Lasers. J Funct Biomater 2018; 10:jfb10010002. [PMID: 30586923 PMCID: PMC6463085 DOI: 10.3390/jfb10010002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 12/13/2018] [Accepted: 12/21/2018] [Indexed: 12/18/2022] Open
Abstract
Physics-based biomedical approaches have proved their importance for the advancement of medical sciences and especially in medical diagnostics and treatments. Thus, the expectations regarding development of novel promising physics-based technologies and tools are very high. This review describes the latest research advances in biomedical applications of external physical cues. We overview three distinct topics: using high-gradient magnetic fields in nanoparticle-mediated cell responses; non-thermal plasma as a novel bactericidal agent; highlights in understanding of cellular mechanisms of laser irradiation. Furthermore, we summarize the progress, challenges and opportunities in those directions. We also discuss some of the fundamental physical principles involved in the application of each cue. Considerable technological success has been achieved in those fields. However, for the successful clinical translation we have to understand the limitations of technologies. Importantly, we identify the misconceptions pervasive in the discussed fields.
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Affiliation(s)
- Barbora Smolková
- Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic.
| | - Mariia Uzhytchak
- Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic.
| | - Anna Lynnyk
- Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic.
| | - Šárka Kubinová
- Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic.
- Institute of Experimental Medicine of the Czech Academy of Sciences, 14220 Prague, Czech Republic.
| | - Alexandr Dejneka
- Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic.
| | - Oleg Lunov
- Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic.
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25
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Carré G, Charpentier E, Audonnet S, Terryn C, Boudifa M, Doliwa C, Belgacem ZB, Gangloff SC, Gelle MP. Contribution of Fluorescence Techniques in Determining the Efficiency of the Non-thermal Plasma Treatment. Front Microbiol 2018; 9:2171. [PMID: 30250463 PMCID: PMC6140754 DOI: 10.3389/fmicb.2018.02171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/23/2018] [Indexed: 11/13/2022] Open
Abstract
We have recently developed a non-thermal plasma (NTP) equipment intended to sterilize fragile medical devices and maintain the sterile state of items downstream the treatment. With traditional counts on agar plate a six log reduction of Staphylococcus aureus viability was obtained within 120 min of O2, Ar, or N2 NTP treatments. However to determine the best NTP process, we studied the different physiological states of S. aureus by flow cytometry (FC) and confocal laser scanning microscopy (CLSM) focusing on the esterasic activity and membrane integrity of the bacteria. Two fluorochromes, 5-(and-6)-carboxy-2',7'-dichlorofluorescein diacetate and propidium iodide were used in order to distinguish three sub-populations: metabolically active, permeabilized, and damaged bacteria that can be in the viable but nonculturable state. FC and CLSM highlight that O2 and Ar NTP treatments were the most attractive processes. Indeed, a 5 min of Ar NTP generated a high destruction of the structure of bacteria and a 120 min of O2 NTP treatment led to the higher decrease of the total damaged bacteria population. SEM observations showed that in presence of clusters, bacteria of upper layers are easily altered compared to bacteria in the deeper layers. In conclusion, the plate counting method is not sufficient by itself to determine the best NTP treatment. FC and CLSM represent attractive indicator techniques to select the most efficient gas NTP treatment generating the lowest proportion of viable bacteria and the most debris.
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Affiliation(s)
- Gaëlle Carré
- Laboratoire de Biomatériaux et Inflammation en Site Osseux (EA 4691), SFR CAP-Santé, FED 4231, Université de Reims Champagne-Ardenne, Reims, France
| | - Emilie Charpentier
- Laboratoire de Biomatériaux et Inflammation en Site Osseux (EA 4691), SFR CAP-Santé, FED 4231, Université de Reims Champagne-Ardenne, Reims, France.,Unité de Formation et de Recherche de Pharmacie, Université de Reims Champagne-Ardenne, Reims, France
| | - Sandra Audonnet
- URCACyt - Plateau technique de cytométrie en flux, Université de Reims Champagne-Ardenne, Reims, France.,PICT - Plateforme d'Imagerie Cellulaire et Tissulaire, Université de Reims Champagne-Ardenne, Reims, France
| | - Christine Terryn
- PICT - Plateforme d'Imagerie Cellulaire et Tissulaire, Université de Reims Champagne-Ardenne, Reims, France
| | | | - Christelle Doliwa
- Laboratoire de Biomatériaux et Inflammation en Site Osseux (EA 4691), SFR CAP-Santé, FED 4231, Université de Reims Champagne-Ardenne, Reims, France
| | - Zouhaier Ben Belgacem
- Laboratoire de Biomatériaux et Inflammation en Site Osseux (EA 4691), SFR CAP-Santé, FED 4231, Université de Reims Champagne-Ardenne, Reims, France
| | - Sophie C Gangloff
- Laboratoire de Biomatériaux et Inflammation en Site Osseux (EA 4691), SFR CAP-Santé, FED 4231, Université de Reims Champagne-Ardenne, Reims, France.,Unité de Formation et de Recherche de Pharmacie, Université de Reims Champagne-Ardenne, Reims, France
| | - Marie-Paule Gelle
- Laboratoire de Biomatériaux et Inflammation en Site Osseux (EA 4691), SFR CAP-Santé, FED 4231, Université de Reims Champagne-Ardenne, Reims, France.,UFR Odontologie, Reims, France.,Pôle Médecine Bucco-Dentaire, Centre Hospitalier Universitaire de Reims, Reims, France
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26
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Mathematical Modelling of the Effects of Plasma Treatment on the Diffusivity of Biofilm. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8101729] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Biofilm formation on implanted medical devices is the reason for most of the nosocomial infections in clinical settings. Biofilms are more resistant to antimicrobials than their planktonic cells mainly because of the presence of the matrix of extracellular polymeric substances (EPSs), which acts as a physical barrier that limits the transport of antimicrobials inside the biofilm. A combinatorial antimicrobial approach of a non-thermal plasma and chlorhexidine (CHX) digluconate can be used to sterilize those surfaces contaminated with biofilm. However, the reason behind achieving this combinatorial decontamination is not known. Thus, in this study, we developed a mathematical model to explain the reason behind sterilization with the combinatorial treatment approach. It was found that the application of plasma prior to treatment with CHX is disrupting the biofilm and making it very porous. This is allowing CHX to penetrate deeper inside the porous biofilm, which is then effective at sterilizing the biofilm.
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27
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Liao X, Muhammad AI, Chen S, Hu Y, Ye X, Liu D, Ding T. Bacterial spore inactivation induced by cold plasma. Crit Rev Food Sci Nutr 2018; 59:2562-2572. [PMID: 29621402 DOI: 10.1080/10408398.2018.1460797] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Cold plasma has emerged as a non-thermal technology for microbial inactivation in the food industry over the last decade. Spore-forming microorganisms pose challenges for microbiological safety and for the prevention of food spoilage. Inactivation of spores induced by cold plasma has been reported by several studies. However, the exact mechanism of spore deactivation by cold plasma is poorly understood; therefore, it is difficult to control this process and to optimize cold plasma processing for efficient spore inactivation. In this review, we summarize the factors that affect the resistance of spores to cold plasma, including processing parameters, environmental elements, and spore properties. We then describe possible inactivation targets in spore cells (e.g., outer structure, DNA, and metabolic proteins) that associated with inactivation by cold plasma according to previous studies. Kinetic models of the sporicidal activity of cold plasma have also been described here. A better understanding of the interaction between spores and cold plasma is essential for the development and optimization of cold plasma technology in food the industry.
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Affiliation(s)
- Xinyu Liao
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Fuli Institute of Food Science, Zhejiang University , Hangzhou , China
| | - Aliyu Idris Muhammad
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Department of Agricultural and Environmental Engineering, Faculty of Engineering, Bayero University Kano , Kano , Nigeria
| | - Shiguo Chen
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China
| | - Yaqin Hu
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China
| | - Xingqian Ye
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China
| | - Donghong Liu
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Fuli Institute of Food Science, Zhejiang University , Hangzhou , China
| | - Tian Ding
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Fuli Institute of Food Science, Zhejiang University , Hangzhou , China
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28
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Study on the Bactericidal Mechanism of Atmospheric-Pressure Low-Temperature Plasma against Escherichia coli and Its Application in Fresh-Cut Cucumbers. Molecules 2018; 23:molecules23040975. [PMID: 29690567 PMCID: PMC6017287 DOI: 10.3390/molecules23040975] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 04/18/2018] [Accepted: 04/20/2018] [Indexed: 12/02/2022] Open
Abstract
Atmospheric-pressure low-temperature plasma (APLTP) was used to study the bactericidal mechanism against Escherichia coli (E. coli) and its application in the sterilization of fresh-cut cucumbers. The morphological changes of E. coli cells subjected to APLTP were observed by scanning electron microscopy (SEM). Cell death was evaluated by fluorescence microscopy (FM). Cell membrane permeability was measured by conductivity changes, and the amount of soluble protein leakage in the bacterial supernatant was determined by measurement of protein concentration. Additionally, the effects of APLTP on the physicochemical and sensory quality of fresh-cut cucumber were studied by assessing the changes of moisture content, soluble solid content (SSC), pH value, color, relative conductivity, malondialdehyde (MDA) level, vitamin C (Vc) content, aroma composition and microstructure. The results showed that the E. coli cell morphology was changed due to the charged particles and active components produced by APLTP. The E. coli cell wall and cell membrane ruptured, cell content leaked out, cells lost the ability to reproduce and self-replicate, and the function of cell metabolism was directly affected and led to E. coli inactivation. In addition, there was no significant effect on physicochemical properties and sensory quality of fresh-cut cucumbers.
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