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Handorf O, Schnabel U, Bösel A, Weihe T, Bekeschus S, Graf AC, Riedel K, Ehlbeck J. Antimicrobial effects of microwave-induced plasma torch (MiniMIP) treatment on Candida albicans biofilms. Microb Biotechnol 2019; 12:1034-1048. [PMID: 31264377 PMCID: PMC6680639 DOI: 10.1111/1751-7915.13459] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 06/05/2019] [Accepted: 06/17/2019] [Indexed: 11/28/2022] Open
Abstract
The susceptibility of Candida albicans biofilms to a non-thermal plasma treatment has been investigated in terms of growth, survival and cell viability by a series of in vitro experiments. For different time periods, the C. albicans strain SC5314 was treated with a microwave-induced plasma torch (MiniMIP). The MiniMIP treatment had a strong effect (reduction factor (RF) = 2.97 after 50 s treatment) at a distance of 3 cm between the nozzle and the superior regions of the biofilms. In addition, a viability reduction of 77% after a 20 s plasma treatment and a metabolism reduction of 90% after a 40 s plasma treatment time were observed for C. albicans. After such a treatment, the biofilms revealed an altered morphology of their cells by atomic force microscopy (AFM). Additionally, fluorescence microscopy and confocal laser scanning microscopy (CLSM) analyses of plasma-treated biofilms showed that an inactivation of cells mainly appeared on the bottom side of the biofilms. Thus, the plasma inactivation of the overgrown surface reveals a new possibility to combat biofilms.
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Affiliation(s)
- Oliver Handorf
- Leibniz Institute for Plasma Science and Technology (INP)Felix‐Hausdorff‐Str. 217489GreifswaldGermany
| | - Uta Schnabel
- Leibniz Institute for Plasma Science and Technology (INP)Felix‐Hausdorff‐Str. 217489GreifswaldGermany
- School of Food Science and Environmental Health, College of Sciences and HealthTechnological UniversityDublinCathal Brugha StreetD01 HV58DublinIreland
| | - André Bösel
- Leibniz Institute for Plasma Science and Technology (INP)Felix‐Hausdorff‐Str. 217489GreifswaldGermany
| | - Thomas Weihe
- Leibniz Institute for Plasma Science and Technology (INP)Felix‐Hausdorff‐Str. 217489GreifswaldGermany
| | - Sander Bekeschus
- Leibniz Institute for Plasma Science and Technology (INP)Felix‐Hausdorff‐Str. 217489GreifswaldGermany
| | - Alexander Christian Graf
- Institute of Microbial Physiology and Molecular BiologyUniversity of GreifswaldFelix‐Hausdorff‐Str. 817489GreifswaldGermany
| | - Katharina Riedel
- Institute of Microbial Physiology and Molecular BiologyUniversity of GreifswaldFelix‐Hausdorff‐Str. 817489GreifswaldGermany
| | - Jörg Ehlbeck
- Leibniz Institute for Plasma Science and Technology (INP)Felix‐Hausdorff‐Str. 217489GreifswaldGermany
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202
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Feng X, Ma X, Liu H, Xie J, He C, Fan R. Argon plasma effects on maize: pesticide degradation and quality changes. J Sci Food Agric 2019; 99:5491-5498. [PMID: 31095729 DOI: 10.1002/jsfa.9810] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 04/18/2019] [Accepted: 05/13/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND During planting, storage and transportation of maize excessive amounts of pesticides are used to ensure production, resulting in pesticide residues on the maize that can threaten human health. Plasma, compared with other technologies, has been widely regarded as a green, safe and promising technology for surface decontamination to ensure maize safety and quality. RESULTS The aim of this study is to discuss plasma effects on the degradation of chlorpyrifos and carbaryl on maize surface and the changes of treated maize quality. Results achieved the largest degradation efficiency of chlorpyrifos and carbaryl, up to 91.5% and 73.1%, respectively. The physical changes of maize were observed by scanning electron microscopy (SEM), showing a decrease in contact angle, an increase in surface free energy and polar component, leading to improved hydrophilicity of the treated maize. There was no significant change of vitamin B2 content of maize. A significant increase of acid value and decrease of moisture content and starch content were observed within acceptable limits. CONCLUSION It is reasonable to believe that argon plasma treatment enhances the edible safety of maize while maintaining maize quality. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Xinxin Feng
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Xin Ma
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Hongxia Liu
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Jinzhuo Xie
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Chi He
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Rui Fan
- State Key Laboratory of Electronic Physics and Devices, Xi'an Jiaotong University, Xi'an, P. R. China
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203
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Filipić A, Primc G, Zaplotnik R, Mehle N, Gutierrez-Aguirre I, Ravnikar M, Mozetič M, Žel J, Dobnik D. Cold Atmospheric Plasma as a Novel Method for Inactivation of Potato Virus Y in Water Samples. Food Environ Virol 2019; 11:220-228. [PMID: 31037614 PMCID: PMC6689025 DOI: 10.1007/s12560-019-09388-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/16/2019] [Indexed: 05/22/2023]
Abstract
While one of the biggest problems we are facing today is water scarcity, enormous quantities of water are still being used in irrigation. If contaminated, this water can act as an effective pathway for the spread of disease-causing agents, like viruses. Here, we present a novel, environmentally friendly method known as cold atmospheric plasma for inactivation of viruses in water used in closed irrigation systems. We measured the plasma-mediated viral RNA degradation as well as the plasma-induced loss of viral infectivity using potato virus Y as a model virus due to its confirmed water transmissibility and economic as well as biological importance. We showed that only 1 min of plasma treatment is sufficient for successful inactivation of viruses in water samples with either high or low organic background. The plasma-mediated inactivation was efficient even at markedly higher virus concentrations than those expected in irrigation waters. Obtained results point to reactive oxygen species as the main mode of viral inactivation. Our laboratory-scale experiments confirm for the first time that plasma has an excellent potential as the eukaryotic virus inactivation tool for water sources and could thus provide a cost-effective solution for irrigation mediated plant virus transmission. The outstanding inactivation efficiency demonstrated by plasma treatments in water samples offers further expansions of its application to other water sources such as reused wastewater or contaminated drinking waters, as well as other plant, animal, and human waterborne viruses, ultimately leading to the prevention of water scarcity and numerous human, animal, and plant infections worldwide.
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Affiliation(s)
- Arijana Filipić
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia.
- Jožef Stefan International Postgraduate School, Jamova cesta 39, 1000, Ljubljana, Slovenia.
| | - Gregor Primc
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Jamova cesta 39, 1000, Ljubljana, Slovenia
| | - Rok Zaplotnik
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Jamova cesta 39, 1000, Ljubljana, Slovenia
| | - Nataša Mehle
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - Ion Gutierrez-Aguirre
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - Maja Ravnikar
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
- University of Nova Gorica, Vipavska 13, 5000, Nova Gorica, Slovenia
| | - Miran Mozetič
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Jamova cesta 39, 1000, Ljubljana, Slovenia
| | - Jana Žel
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - David Dobnik
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
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204
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Abstract
The applications of the cold atmospheric plasma jet (CAPJ) in cancer treatment have been investigated for over a decade, focused on the effect that the CAPJ creates on cancer cells. Here we report for the first time on the impact that cells have on the CAPJ during treatment. To better understand these CAPJ-cell interactions, we analyzed the CAPJ behaviors in the presence of several normal and cancer cell lines and investigated the CAPJ selectivity. A more in-depth study of plasma self-organization patterns utilizing a model which contains a combination of normal and cancer cells reveals that the cells' capacitance can be an important predictor of plasma jet behavior. Cancer cells can direct the jet either toward or away from normal cells, which depends on the boundary condition behind the cell colony. Both experimental and theoretical results show that a grounded copper board beneath the cell-culture dish leads to opposite CPAJ behaviors compared with a floating boundary condition. In conclusion, our findings indicate that plasma can be self-adaptive toward cancer cells, and such a feature can be manipulated. Therefore, using the permittivity difference among cell lines may help us focus plasmas upon cancer cells at the vicinity of normal tissues and maximize the selectivity of plasma treatments.
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Affiliation(s)
- Li Lin
- Department of Mechanical and Aerospace Engineering , The George Washington University , 800 22nd Street NW , Washington , D.C. 20052 , United States of America
| | - Dayun Yan
- Department of Mechanical and Aerospace Engineering , The George Washington University , 800 22nd Street NW , Washington , D.C. 20052 , United States of America
| | - Eda Gjika
- Department of Mechanical and Aerospace Engineering , The George Washington University , 800 22nd Street NW , Washington , D.C. 20052 , United States of America
| | - Jonathan H Sherman
- Department of Mechanical and Aerospace Engineering , The George Washington University , 800 22nd Street NW , Washington , D.C. 20052 , United States of America
| | - Michael Keidar
- Department of Mechanical and Aerospace Engineering , The George Washington University , 800 22nd Street NW , Washington , D.C. 20052 , United States of America
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205
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Soler-Arango J, Figoli C, Muraca G, Bosch A, Brelles-Mariño G. The Pseudomonas aeruginosa biofilm matrix and cells are drastically impacted by gas discharge plasma treatment: A comprehensive model explaining plasma-mediated biofilm eradication. PLoS One 2019; 14:e0216817. [PMID: 31233528 PMCID: PMC6590783 DOI: 10.1371/journal.pone.0216817] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 04/28/2019] [Indexed: 12/21/2022] Open
Abstract
Biofilms are microbial communities encased in a protective matrix composed of exopolymeric substances including exopolysaccharides, proteins, lipids, and extracellular DNA. Biofilms cause undesirable effects such as biofouling, equipment damage, prostheses colonization, and disease. Biofilms are also more resilient than free-living cells to regular decontamination methods and therefore, alternative methods are needed to eradicate them. The use of non-thermal atmospheric pressure plasmas is a good alternative as plasmas contain reactive species, free radicals, and UV photons well-known for their decontamination potential against free microorganisms. Pseudomonas aeruginosa biofilms colonize catheters, indwelling devices, and prostheses. Plasma effects on cell viability have been previously documented for P. aeruginosa biofilms. Nonetheless, the effect of plasma on the biofilm matrix has received less attention and there is little evidence regarding the changes the matrix undergoes. The aim of this work was to study the effect plasma exerts mostly on the P. aeruginosa biofilm matrix and to expand the existing knowledge about its effect on sessile cells in order to achieve a better understanding of the mechanism/s underlying plasma-mediated biofilm inactivation. We report a reduction in the amount of the biofilm matrix, the loss of its tridimensional structure, and morphological changes in sessile cells at long exposure times. We show chemical and structural changes on the biofilm matrix (mostly on carbohydrates and eDNA) and cells (mostly on proteins and lipids) that are more profound with longer plasma exposure times. We also demonstrate the presence of lipid oxidation products confirming cell membrane lipid peroxidation as plasma exposure time increases. To our knowledge this is the first report providing detailed evidence of the variety of chemical and structural changes that occur mostly on the biofilm matrix and sessile cells as a consequence of the plasma treatment. Based on our results, we propose a comprehensive model explaining plasma-mediated biofilm inactivation.
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Affiliation(s)
- Juliana Soler-Arango
- Biofilm Eradication Laboratory, Center for Research and Development of Industrial Fermentations, Consejo Nacional de Investigaciones Científicas y Técnicas (CINDEFI, CCT-LA PLATA-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Cecilia Figoli
- Bioespectroscopy Laboratory, Center for Research and Development of Industrial Fermentations, Consejo Nacional de Investigaciones Científicas y Técnicas (CINDEFI, CCT-LA PLATA-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Giuliana Muraca
- Biofilm Eradication Laboratory, Center for Research and Development of Industrial Fermentations, Consejo Nacional de Investigaciones Científicas y Técnicas (CINDEFI, CCT-LA PLATA-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Alejandra Bosch
- Bioespectroscopy Laboratory, Center for Research and Development of Industrial Fermentations, Consejo Nacional de Investigaciones Científicas y Técnicas (CINDEFI, CCT-LA PLATA-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
- * E-mail: (AB); (GBM)
| | - Graciela Brelles-Mariño
- Biofilm Eradication Laboratory, Center for Research and Development of Industrial Fermentations, Consejo Nacional de Investigaciones Científicas y Técnicas (CINDEFI, CCT-LA PLATA-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
- * E-mail: (AB); (GBM)
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206
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Casas-Junco PP, Solís-Pacheco JR, Ragazzo-Sánchez JA, Aguilar-Uscanga BR, Bautista-Rosales PU, Calderón-Santoyo M. Cold Plasma Treatment as an Alternative for Ochratoxin a Detoxification and Inhibition of Mycotoxigenic Fungi in Roasted Coffee. Toxins (Basel) 2019; 11:toxins11060337. [PMID: 31200476 PMCID: PMC6628446 DOI: 10.3390/toxins11060337] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/04/2019] [Accepted: 06/05/2019] [Indexed: 11/16/2022] Open
Abstract
Ochratoxin A (OTA) produced by mycotoxigenic fungi (Aspergillus and Penicillium spp.) is an extremely toxic and carcinogenic metabolite. The use of cold plasma to inhibit toxin-producing microorganisms in coffee could be an important alternative to avoid proliferation of mycotoxigenic fungi. Roasted coffee samples were artificially inoculated with A. westerdijikiae, A. steynii, A. versicolor, and A. niger, and incubated at 27 °C over 21 days for OTA production. Samples were cold plasma treated at 30 W input power and 850 V output voltage with helium at 1.5 L/min flow. OTA production in coffee was analyzed by high performance liquid chromatography coupled to a mass spectrometer (HPLC-MS). After 6 min of treatment with cold plasma, fungi were completely inhibited (4 log reduction). Cold plasma reduces 50% of OTA content after 30 min of treatment. Toxicity was estimated for extracts of artificially contaminated roasted coffee samples using the brine shrimp (Artemia salina) lethality assay. Toxicity for untreated roasted coffee was shown to be “toxic”, while toxicity for cold plasma treated coffee was reduced to “slightly toxic”. These results suggested that cold plasma may be considered as an alternative method for the degradation and reduction of toxin production by mycotoxigenic fungi in the processing of foods and feedstuffs.
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Affiliation(s)
- Paloma Patricia Casas-Junco
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Av. Tecnológico #2595, Col. Lagos del Country, C.P. 63175 Tepic, Nayarit, Mexico.
| | - Josué Raymundo Solís-Pacheco
- Laboratorio de Microbiología Industrial, Centro Universitario de Ciencias Exactas e Ingeniería, Universidad de Guadalajara, Boulevard Marcelino García Barragán #1421, Col. Olímpica, C.P. 44430 Guadalajara, Jalisco, Mexico.
| | - Juan Arturo Ragazzo-Sánchez
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Av. Tecnológico #2595, Col. Lagos del Country, C.P. 63175 Tepic, Nayarit, Mexico.
| | - Blanca Rosa Aguilar-Uscanga
- Laboratorio de Microbiología Industrial, Centro Universitario de Ciencias Exactas e Ingeniería, Universidad de Guadalajara, Boulevard Marcelino García Barragán #1421, Col. Olímpica, C.P. 44430 Guadalajara, Jalisco, Mexico.
| | - Pedro Ulises Bautista-Rosales
- Centro de Tecnología de Alimentos, Universidad Autónoma de Nayarit, Ciudad de la Cultura "Amado Nervo", C.P. 63155 Tepic, Nayarit, Mexico.
| | - Montserrat Calderón-Santoyo
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Av. Tecnológico #2595, Col. Lagos del Country, C.P. 63175 Tepic, Nayarit, Mexico.
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207
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Perez SM, Biondi E, Laurita R, Proto M, Sarti F, Gherardi M, Bertaccini A, Colombo V. Plasma activated water as resistance inducer against bacterial leaf spot of tomato. PLoS One 2019; 14:e0217788. [PMID: 31150501 PMCID: PMC6544305 DOI: 10.1371/journal.pone.0217788] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 05/18/2019] [Indexed: 12/15/2022] Open
Abstract
Plant bacterial diseases are routinely managed with scheduled treatments based on heavy metal compounds or on antibiotics; to reduce the negative environmental impact due to the use of such chemical compounds, as pollution or selection of antibiotic resistant pathogens, the integrated control management is required. In the frame of a sustainable agriculture the use of bacterial antagonists, biological agents, plant defence response elicitors or resistant host plant genotypes are the most effective approaches. In this work, cold atmospheric pressure plasma (CAP) was applied to sterile distilled water, inducing the production of a hydrogen peroxide, nitrite and nitrate, and a pH reduction. In particular, an atmospheric pressure dielectric barrier discharge (DBD) has been used to produce plasma activated water (PAW), that was firstly assayed in in vitro experiments and then in planta through application at the root apparatus of tomato plants, against Xanthomonas vesicatoria (Xv), the etiological agent of bacterial leaf spot. Moreover, the transcription abundance of five genes related to the plant defense was investigated in response to PAW treatment. PAW did not show direct antimicrobial activity against Xv in in vitro experiments, but it enhanced the tomato plants defenses. It was effective in reducing the disease severity by giving relative protections of ca. 61, 51 and 38% when applied 1 h, 24 h and 6 days before the experimental inoculation, respectively. In addition, the experiments highlighted the pal gene involvement in response to the PAW treatments and against the pathogen; its transcription levels resulted significantly high from 1 to 48 h until their decrease 192 h after PAW application.
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Affiliation(s)
- Set Madian Perez
- Department of Agricultural and Food Sciences (DISTAL), Plant Pathology, Alma Mater Studiorum—University of Bologna, Bologna, Italy
- Instituto de Ciencias Agronómicas y Veterinarias, Universidad de O’Higgins, Rancagua, Chile
| | - Enrico Biondi
- Department of Agricultural and Food Sciences (DISTAL), Plant Pathology, Alma Mater Studiorum—University of Bologna, Bologna, Italy
- * E-mail:
| | - Romolo Laurita
- Department of Industrial Engineering (DIN), Alma Mater Studiorum—University of Bologna, Bologna, Italy
| | - Mariarita Proto
- Department of Agricultural and Food Sciences (DISTAL), Plant Pathology, Alma Mater Studiorum—University of Bologna, Bologna, Italy
| | - Fabio Sarti
- Department of Agricultural and Food Sciences (DISTAL), Plant Pathology, Alma Mater Studiorum—University of Bologna, Bologna, Italy
| | - Matteo Gherardi
- Department of Industrial Engineering (DIN), Alma Mater Studiorum—University of Bologna, Bologna, Italy
- Interdepartmental Center for Industrial Research Advanced Mechanical Engineering Applications and Materials Technology, Alma Mater Studiorum—University of Bologna, Bologna, Italy
| | - Assunta Bertaccini
- Department of Agricultural and Food Sciences (DISTAL), Plant Pathology, Alma Mater Studiorum—University of Bologna, Bologna, Italy
| | - Vittorio Colombo
- Department of Industrial Engineering (DIN), Alma Mater Studiorum—University of Bologna, Bologna, Italy
- Interdepartmental Center for Industrial Research Advanced Mechanical Engineering Applications and Materials Technology, Alma Mater Studiorum—University of Bologna, Bologna, Italy
- Interdepartmental Centre for Industrial Research Agrifood, Alma Mater Studiorum-Università di Bologna, Cesena, Italy
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208
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Tang SW, Uddin MH, Tong WY, Pasic P, Yuen W, Thissen H, Lam YW, Voelcker NH. Replication of a Tissue Microenvironment by Thermal Scanning Probe Lithography. ACS Appl Mater Interfaces 2019; 11:18988-18994. [PMID: 31051073 DOI: 10.1021/acsami.9b05553] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Thermal scanning probe lithography (t-SPL) is a nanofabrication technique in which an immobilized thermolabile resist, such as polyphthalaldehyde (PPA), is locally vaporized by a heated atomic force microscope tip. Compared with other nanofabrication techniques, such as soft lithography and nanoimprinting lithography, t-SPL is more efficient and convenient as it does not involve time-consuming mask productions or complicated etching procedures, making it a promising candidate technique for the fast prototyping of nanoscale topographies for biological studies. Here, we established the direct use of PPA-coated surfaces as a cell culture substrate. We showed that PPA is biocompatible and that the deposition of allylamine by plasma polymerization on a silicon wafer before PPA coating can stabilize the immobilization of PPA in aqueous solutions. When seeded on PPA-coated surfaces, human mesenchymal stem cells (MSC) adhered, spread, and proliferated in a manner indistinguishable from cells cultured on glass surfaces. This allowed us to subsequently use t-SPL to generate nanotopographies for cell culture experiments. As a proof of concept, we analyzed the surface topography of bovine tendon sections, previously shown to induce morphogenesis and differentiation of MSC, by means of atomic force microscopy, and then "wrote" topographical data on PPA by means of t-SPL. The resulting substrate, matching the native tissue topography on the nanoscale, was directly used for MSC culture. The t-SPL substrate induced similar changes in cell morphology and focal adhesion formation in the MSC compared to native tendon sections, suggesting that t-SPL can rapidly generate cell culture substrates with complex and spatially accurate topographical signals. This technique may greatly accelerate the prototyping of models for the study of cell-matrix interactions.
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Affiliation(s)
- Sze Wing Tang
- Department of Chemistry , City University of Hong Kong , Tat Chee Avenue , Kowloon , Hong Kong SAR
| | - Md Hemayet Uddin
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility , 151 Wellington Road , Clayton , Victoria 3168 , Australia
| | - Wing Yin Tong
- Commonwealth Scientific and Industrial Research Organization (CSIRO) , Clayton , Victoria 3168 , Australia
| | - Paul Pasic
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility , 151 Wellington Road , Clayton , Victoria 3168 , Australia
| | - Wai Yuen
- HealthBaby Biotech (Hong Kong) Company, Limited , Lakeside 2 West Wing, No. 10 Science Park West Avenue , Sha Tin , Hong Kong SAR
| | - Helmut Thissen
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility , 151 Wellington Road , Clayton , Victoria 3168 , Australia
| | - Yun Wah Lam
- Department of Chemistry , City University of Hong Kong , Tat Chee Avenue , Kowloon , Hong Kong SAR
| | - Nicolas H Voelcker
- Drug Delivery Disposition & Dynamics, Monash Institute of Pharmaceutical Science , Monash University , 381 Royal Parade , Parkville , Victoria 3052 , Australia
- Commonwealth Scientific and Industrial Research Organization (CSIRO) , Clayton , Victoria 3168 , Australia
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility , 151 Wellington Road , Clayton , Victoria 3168 , Australia
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209
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Pu QK, Liu SJ, Huang H, Xiong JF, Zhnang L, Fang Z, Wang C. [Sterilization Effect of an Atmospheric Low Temperature Plasma Jet on Candida albicans Biofilm]. Sichuan Da Xue Xue Bao Yi Xue Ban 2019; 50:339-343. [PMID: 31631600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To evaluate the sterilization effect of new designed atmospheric low temperature plasma jet on Candida albicans ( C. albicans) biofilm. METHODS C. albicans was grown into the logarithmic phase, and then was added to polystyrene 24-well microtitre plate. The amount of germs were calculated by viable plate counting to determine the reproducibility of each biofilm well. The germs in biofilm were treated by plasma for different exposure time and then the survived germs were quantified by plate counting, the dead cells were determined by staining the biofilm with propidium iodide (PI), and the ultrastructural changes of the germs in biofilm were observed by transmission electron microscopy (TEM). RESULTS When incubated for 72 h, germs tightly polymerized and classical mature biofilm were formed. This atmospheric low temperature plasma jet could inactivate C. albicans biofilm within a short exposure time. C. albicans were 90% inactivated when treated 20 s and 55 s of plasma treatment reduced bacteria populations to undetectable levels. With the increase of treatment time, enlarged fluorescent positive area appeared, and more bacteria died with the extending of exposure. The TEM scanning results showed that the new plasma jet inactivated C. albicans biofilm mainly via disrupting cell envelopes and then leading the release of cellular components, thus resulting in loss of cell viability. CONCLUSION Plasma generated from atmospheric low temperature plasma jet could damage the cell structure of C. albicans and efficiently sterilize C. albicans biofilm.
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Affiliation(s)
- Qi-Kang Pu
- Department of Public Health Laboratory Sciences, West China School of Public Health, Sichuan University, Chengdu 610041, China
- Research Center for Public Health and Preventive Medicine, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Si-Jing Liu
- Department of Public Health Laboratory Sciences, West China School of Public Health, Sichuan University, Chengdu 610041, China
- Research Center for Public Health and Preventive Medicine, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Huan Huang
- Department of Public Health Laboratory Sciences, West China School of Public Health, Sichuan University, Chengdu 610041, China
- Research Center for Public Health and Preventive Medicine, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Jing-Fei Xiong
- Department of Public Health Laboratory Sciences, West China School of Public Health, Sichuan University, Chengdu 610041, China
- Research Center for Public Health and Preventive Medicine, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Li Zhnang
- Department of Public Health Laboratory Sciences, West China School of Public Health, Sichuan University, Chengdu 610041, China
- Research Center for Public Health and Preventive Medicine, West China School of Public Health, Sichuan University, Chengdu 610041, China
| | - Zhi Fang
- College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 210009, China
| | - Chuan Wang
- Department of Public Health Laboratory Sciences, West China School of Public Health, Sichuan University, Chengdu 610041, China
- Research Center for Public Health and Preventive Medicine, West China School of Public Health, Sichuan University, Chengdu 610041, China
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Abstract
Cold plasma technology offers new opportunities to the decontamination and preservation of fruits and vegetables. In the present research, strawberries were cut into four wedges and then treated with dielectric barrier discharge plasma at 45 kV for 1 min and stored for 1 week (4 °C). Metabolomic analysis suggested that plasma treatment improved the biosynthesis of the metabolites in the "flavones and flavonol biosynthesis" pathway and "biosynthesis of phenylpropanoids" pathway in fresh-cut strawberries. Physiological assay demonstrated that plasma treatment maintained the texture properties and inhibited microbial growth of fresh-cut strawberries. In addition, plasma treatment also promoted the accumulation of total phenolics, total flavonoid, and anthocyanin by enhancing the critical enzyme activities and activating related gene expression in phenylpropanoid as well as reactive oxygen species metabolism, which contributed greatly to the enhancement of antioxidant capacity of strawberry wedges. Our investigation provided a new perspective of the effect of plasma treatment on the safety and quality of strawberry wedges and suggested that cold plasma treatment holds promise as an emerging processing technology for improving the quality and antioxidant activity of postharvest fruits and vegetables.
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Affiliation(s)
- Meilin Li
- College of Food Science and Technology , Nanjing Agricultural University , Nanjing , 210095 , PR China
| | - Xiaoan Li
- School of Agricultural Engineering and Food Science , Shandong University of Technology , Zibo 255000 , PR China
| | - Cong Han
- College of Food Science and Engineering , Qilu University of Technology , Jinan , 250353 , PR China
| | - Nana Ji
- College of Food Science and Technology , Nanjing Agricultural University , Nanjing , 210095 , PR China
| | - Peng Jin
- College of Food Science and Technology , Nanjing Agricultural University , Nanjing , 210095 , PR China
| | - Yonghua Zheng
- College of Food Science and Technology , Nanjing Agricultural University , Nanjing , 210095 , PR China
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211
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Park J, Lee H, Lee HJ, Kim GC, Kim SS, Han S, Song K. Non-thermal atmospheric pressure plasma is an excellent tool to activate proliferation in various mesoderm-derived human adult stem cells. Free Radic Biol Med 2019; 134:374-384. [PMID: 30685405 DOI: 10.1016/j.freeradbiomed.2019.01.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 02/08/2023]
Abstract
Adult stem cells are capable of self-renewal and differentiation into specific cell types in tissues and have high potential for stem cell therapy. Mesenchymal and hematopoietic stem cells are easily attainable from the human body and have become applicable tools for adult stem cell therapy. However, there are still technical barriers for the application of mesenchymal and hematopoietic stem cells for therapy, such as the small number of cell populations, high risk of contamination, and loss of their stemness properties in vitro. In our previous study, we showed that non-thermal atmospheric pressure plasma (NTAPP) promoted the proliferation of adipose tissue-derived stem cells (ASCs) by 1.6-fold on average, while maintaining their stemness. Here, we examined the feasibility of NTAPP as a tool to activate the proliferation of mesenchymal and hematopoietic stem cells in vitro without affecting their stem cell characteristics. NTAPP increased the proliferation of bone marrow-derived stem cells (BM-MSCs) and hematopoietic stem cells (HSCs) by 1.8- and 2-fold, respectively, when compared to that of untreated cells. As observed in ASCs, NTAPP exposure also activated the expression of stem cell-specific surface markers, CD44 and CD105, by 5-fold in BM-MSCs, when compared to that in unexposed control cells in a low glucose medium with a low concentration of basic fibroblast growth factor (b-FGF). In addition, NTAPP exposure highly augmented the mRNA expression of well-known pluripotent genes for stemness, such as Oct4, Sox2, and Nanog in ASCs and BM-MSCs when compared to that in unexposed control cells. When cell cycle progression was examined, the G1-S shift was accelerated, and expression of PCNA was increased in NTAPP-exposed ASCs when compared to that in untreated control cells, suggesting that NTAPP activated G1-S transition. Taken together, these results demonstrated that NTAPP activated the proliferation of various mesodermal-derived human adult stem cells by accelerating the G1-S transition while maintaining their pluripotency and stemness, strongly suggesting that NTAPP can be an efficient tool for expanding the population of various adult stem cells in vitro for medical applications.
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Affiliation(s)
- Jeongyeon Park
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea
| | - Hyunyoung Lee
- Department of Electrical Engineering, Pusan National University, Pusan, 46241, Republic of Korea
| | - Hae June Lee
- Department of Electrical Engineering, Pusan National University, Pusan, 46241, Republic of Korea
| | - Gyoo Cheon Kim
- Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan, 50612, Republic of Korea
| | - Sung-Soo Kim
- Department of Anatomy, Ajou University School of Medicine, Suwon, 16499, Republic of Korea
| | - Sungbum Han
- Batang Plastic Surgery Center, Seoul, 06120, Republic of Korea
| | - Kiwon Song
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea.
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212
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Roh SH, Lee SY, Park HH, Lee ES, Min SC. Effects of the treatment parameters on the efficacy of the inactivation of Salmonella contaminating boiled chicken breast by in-package atmospheric cold plasma treatment. Int J Food Microbiol 2019; 293:24-33. [PMID: 30634068 DOI: 10.1016/j.ijfoodmicro.2018.12.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 11/10/2018] [Accepted: 12/19/2018] [Indexed: 11/22/2022]
Abstract
The effects of surface coating, microbial loading, surface-to-volume ratio, sample stacking, mixing of samples with romaine lettuce, and shaking of the samples on the inactivation of Salmonella contaminating boiled chicken breast (BCB) cubes using in-package atmospheric dielectric barrier discharge cold plasma (ADCP) treatment at 38.7 kV were investigated. Whey protein coating increased the ADCP treatment efficacy in inactivating Salmonella on BCB cubes; the D-value increased from 0.2 to 1.3 min when the initial inoculum concentration increased from 3.8 to 5.7 log CFU/sample. ADCP decontaminated stacked BCB samples uniformly, and shaking during the treatment increased the inactivation rate. The concentrations of chicken protein isolate, water, and soybean oil in a chicken breast model food that resulted in the highest Salmonella reduction (1.7 log CFU/sample) were 20.5%, 68.9%, and 10.6%, respectively. ADCP treatment did not affect the color and tenderness of the model food, irrespective of its composition. The present study indicated that ADCP is a feasible technology to decontaminate prepackaged ready-to-eat meat cube products.
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Affiliation(s)
- Si Hyeon Roh
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Seung Young Lee
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Hyeon Hwa Park
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Eun Song Lee
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Sea C Min
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea.
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213
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Patange A, Boehm D, Ziuzina D, Cullen PJ, Gilmore B, Bourke P. High voltage atmospheric cold air plasma control of bacterial biofilms on fresh produce. Int J Food Microbiol 2019; 293:137-145. [PMID: 30711711 DOI: 10.1016/j.ijfoodmicro.2019.01.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 01/02/2019] [Accepted: 01/09/2019] [Indexed: 12/24/2022]
Abstract
Atmospheric cold plasma (ACP) offers great potential for decontamination of food borne pathogens. This study examined the antimicrobial efficacy of ACP against a range of pathogens of concern to fresh produce comparing planktonic cultures, monoculture biofilms (Escherichia coli, Salmonella enterica, Listeria monocytogenes, Pseudomonas fluorescens) and mixed culture biofilms (Listeria monocytogenes and Pseudomonas fluorescens). Biotic and abiotic surfaces commonly occurring in the fresh food industry were investigated. Microorganisms showed varying susceptibility to ACP treatment depending on target and process factors. Bacterial biofilm populations treated with high voltage (80 kV) ACP were reduced significantly (p < 0.05) in both mono- and mixed species biofilms after 60 s of treatment and yielded non-detectable levels after extending treatment time to 120 s. However, an extended time was required to reduce the challenge mixed culture biofilm of L. monocytogenes and P. fluorescens inoculated on lettuce, which was dependent on biofilm formation conditions and substrate. Contained treatment for 120 s reduced L. monocytogenes and P. fluorescens inoculated as mixed cultures on lettuce (p < 0.05) by 2.2 and 4.2 Log10 CFU/ml respectively. When biofilms were grown at 4 °C on lettuce, there was an increased resistance to ACP treatment by comparison with biofilm grown at temperature abuse conditions of 15 °C. Similarly, L. monocytogenes and P. fluorescens exposed to cold stress (4 °C) for 1 h demonstrated increased tolerance to ACP treatment compared to non-stressed cells. These finding demonstrates that bacterial form, mono versus mixed challenges as well as environmental stress conditions play an important role in ACP inactivation efficacy.
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Affiliation(s)
- Apurva Patange
- Plasma Research Group, School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland
| | - D Boehm
- Plasma Research Group, School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland
| | - Dana Ziuzina
- Plasma Research Group, School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland
| | - P J Cullen
- Plasma Research Group, School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland
| | - Brendan Gilmore
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT97BL, UK
| | - Paula Bourke
- Plasma Research Group, School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland.
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214
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Kim JE, Oh YJ, Song AY, Min SC. Preservation of red pepper flakes using microwave-combined cold plasma treatment. J Sci Food Agric 2019; 99:1577-1585. [PMID: 30146707 DOI: 10.1002/jsfa.9336] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 08/09/2018] [Accepted: 08/22/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Red pepper flakes are often contaminated with various microorganisms; however, any technologies aiming to decontaminate the flakes should also maintain their quality properties. This study investigated the effect of microwave-combined cold plasma treatment (MCPT) at different microwave power densities on microbial inactivation and preservation of red pepper flakes. Red pepper flake samples inoculated with spores of Bacillus cereus or Aspergillus flavus and without inoculation were subjected to MCPT at 900 W for 20 min at either low microwave power density (LMCPT, 0.17 W m-2 ) or high microwave power density (HMCPT, 0.25 W m-2 ). RESULTS The numbers of B. cereus and A. flavus spores on red pepper flakes after LMCPT and HMCPT were initially reduced by 0.7 ± 0.1 and 1.4 ± 0.3 log spores cm-2 and by 1.5 ± 0.3 and 1.5 ± 0.2 log spores cm-2 respectively and remained constant for 150 days at 25 °C. Immediately after HMCPT, the concentrations of capsaicin and ascorbic acid in the flakes were significantly lower than in untreated samples; however, no difference in concentration was detected during storage. Neither LMCPT nor HMCPT affected the antioxidant activity or color of the flakes during storage. LMCPT also did not affect the sensory properties and the concentrations of capsaicin and dihydrocapsaicin of the flakes, indicating its suitability in preserving their quality properties. CONCLUSION MCPT may provide an effective non-thermal treatment for food preservation which can improve the microbial safety and stability of red pepper flakes while maintaining intact their qualitative properties. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Jung Eun Kim
- Department of Food Science and Technology, Seoul Women's University, Seoul, Republic of Korea
| | - Yeong Ji Oh
- Department of Food Science and Technology, Seoul Women's University, Seoul, Republic of Korea
| | - Ah Young Song
- Department of Food Science and Technology, Seoul Women's University, Seoul, Republic of Korea
| | - Sea C Min
- Department of Food Science and Technology, Seoul Women's University, Seoul, Republic of Korea
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215
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Estifaee P, Su X, Yannam SK, Rogers S, Thagard SM. Mechanism of E. coli Inactivation by Direct-in-liquid Electrical Discharge Plasma in Low Conductivity Solutions. Sci Rep 2019; 9:2326. [PMID: 30787358 PMCID: PMC6382884 DOI: 10.1038/s41598-019-38838-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 01/10/2019] [Indexed: 01/30/2023] Open
Abstract
This work investigates and reveals the main mechanism(s) responsible for inactivation of E. coli by in-liquid pulsed electrical discharge plasma in low conductivity solutions. Experiments were designed and performed to explore the effects of plasma-emitted UV light, oxidative radicals, and electric field on E. coli inactivation curves, rate of DNA leakage and visual appearance of the treated microorganisms. Results showed that electric field had the main role in inactivation; scanning electron microscopy images revealed that both plasma and the isolated electric field result in extensive cell wall disruptions. While this damage in the case of plasma treatment was extensive and distributed randomly along the envelope, the electric field-induced damage resulted in disruption primarily at the poles of the bacterial rods. Subsequent experiments conducted with an oxidative radical scavenger suggested that plasma-generated radicals do not contribute directly to the inactivation but assist in cell wall deterioration and extension of the ruptures first generated by the electric field.
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Affiliation(s)
- P Estifaee
- Clarkson University, Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Potsdam, NY, 13699, USA
| | - X Su
- Clarkson University, Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Potsdam, NY, 13699, USA
| | - S K Yannam
- Clarkson University, Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Potsdam, NY, 13699, USA
| | - S Rogers
- Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY, 13699-5710, USA
| | - S Mededovic Thagard
- Clarkson University, Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Potsdam, NY, 13699, USA.
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216
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Mahnot NK, Mahanta CL, Keener KM, Misra NN. Strategy to achieve a 5-log Salmonella inactivation in tender coconut water using high voltage atmospheric cold plasma (HVACP). Food Chem 2019; 284:303-311. [PMID: 30744862 DOI: 10.1016/j.foodchem.2019.01.084] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 12/07/2018] [Accepted: 01/08/2019] [Indexed: 11/18/2022]
Abstract
This study examined high voltage atmospheric cold plasma (HVACP) technology as a non-thermal intervention for inactivating Salmonella enterica serovar Typhimurium LT2 (ST2) in tender coconut water (TCW). Treatment with HVACP in air at 90 kV for 120 s inactivated 1.30 log10 of ST2. Development of a TCW stimulant suggested an interfering role of magnesium and phosphate salts with HVACP inactivation. Generation of reactive gas species, viz. ozone and hydrogen peroxides were found to be responsible for microbial inactivation. The addition of 400 ppm citric acid to the TCW effectively reduced ST2 by 5 log10 during HVACP treatment. Under these conditions, higher cellular leakage and morphological damage were observed in ST2. Minimal physico-chemical changes in TCW were observed with HVACP treatment, except for an 84.35% ascorbic acid loss (added externally). These results demonstrate a potential pathway for developing highly effective cold plasma treatments to preserve fruit and vegetable juices.
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Affiliation(s)
- Nikhil Kumar Mahnot
- Department of Food Engineering and Technology, School of Engineering, Tezpur University, Assam, India; Department of Food Sciences, Purdue University, West Lafayette, IN, USA
| | - Charu Lata Mahanta
- Department of Food Engineering and Technology, School of Engineering, Tezpur University, Assam, India.
| | - Kevin M Keener
- Department of Food Sciences, Purdue University, West Lafayette, IN, USA; Center for Crops Utilization Research, Iowa State University, Ames, IA, USA; BioCentury Research Farm, Iowa State University, Ames, IA, USA.
| | - N N Misra
- Center for Crops Utilization Research, Iowa State University, Ames, IA, USA.
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217
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Huang Y, Ye XP, Doona CJ, Feeherry FE, Radosevich M, Wang S. An investigation of inactivation mechanisms of Bacillus amyloliquefaciens spores in non-thermal plasma of ambient air. J Sci Food Agric 2019; 99:368-378. [PMID: 29888388 DOI: 10.1002/jsfa.9198] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 04/24/2018] [Accepted: 06/07/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND To utilize the potential of non-thermal plasma technologies for food safety control and sanitation, the inactivation mechanisms of Bacillus amyloliquefaciens spores by non-thermal plasma of ambient air (NTP-AA) were investigated using scanning electron microscopy, atomic force microscopy, attenuated total reflectance Fourier transform infrared spectroscopy with chemometric analysis and proton nuclear magnetic resonance spectroscopy, aiming to probe both the morphological and biochemical changes occurring in spores during the kinetic inactivation process. RESULTS Kinetic analysis indicates that there is no intrinsic D-value (i.e. time required to inactivate 90% of the spores) in spore inactivation by NTP-AA because we observed non-linear (biphasic) inactivation kinetics and, in addition, the inactivation rate depended on the initial spore concentration and how the spores were exposed to the reactive species in the NTP-AA. The presence of suitable amount of water in the NTP-AA field accelerates spore inactivation. CONCLUSION Progressive erosion of spore surface by NTP-AA with ensuing or concomitant biochemical damage, which includes the alteration of structural proteins, internal lipids and the loss of dipicolinic acid content from the spore core, represent the main mechanisms of inactivation, and there is evidence that reactive NTP-AA species could penetrate the cortex and reach the core of spores to cause damage. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Yaohua Huang
- Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN, USA
| | - Xiaofei P Ye
- Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN, USA
| | | | | | - Mark Radosevich
- Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN, USA
| | - Siqun Wang
- Center for Renewable Carbon, The University of Tennessee, Knoxville, TN, USA
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218
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Xia J, Zeng W, Xia Y, Wang B, Xu D, Liu D, Kong MG, Dong Y. Cold atmospheric plasma induces apoptosis of melanoma cells via Sestrin2-mediated nitric oxide synthase signaling. J Biophotonics 2019; 12:e201800046. [PMID: 29931745 DOI: 10.1002/jbio.201800046] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 06/20/2018] [Indexed: 06/08/2023]
Abstract
Cold atmospheric plasma (CAP) represents a promising therapy for selectively cancer killing. However, the mechanism of CAP-induced cancer cell death remains unclear. Here, we identified the tumor necrosis factor-family members, especially Fas, and overloaded intracellular nitric oxide participated in CAP induced apoptosis in A375 and A875 melanoma cell lines, which was known as extrinsic apoptosis pathway. This progress was mediated by antagonistic protein of reactive oxygen species, Sestrin2. The over expression of Sestrin2 induced by plasma treatment resulted in phosphorylation of p38 mitogen-activated protein kinase (MAPK), followed by increased expression of nitric oxide synthase (iNOS), Fas and Fas ligand. Depletion of Sestrin2 reduced iNOS and Fas expression, which was associated with reduction of plasma-induced apoptosis. In contrast, inhibition of iNOS activity and phosphorylation of p38 did not alter Sestrin2 expression in plasma-treated melanoma cells. Taken together, cold atmospheric plasma increases Sestrin2 expression and further activates downstream iNOS, Fas and p38 MAPK signaling to induce apoptosis of melanoma cell lines. These findings suggest a previously unrecognized mechanism in melanoma cells response to cold atmospheric plasma therapy.
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Affiliation(s)
- Jun Xia
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Weihui Zeng
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yumin Xia
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Bingchuan Wang
- Center of Plasma Biomedicine, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Dehui Xu
- Center of Plasma Biomedicine, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Dingxin Liu
- Center of Plasma Biomedicine, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Michael G Kong
- Center of Plasma Biomedicine, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, China
| | - Yingying Dong
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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219
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Sheteiwy MS, An J, Yin M, Jia X, Guan Y, He F, Hu J. Cold plasma treatment and exogenous salicylic acid priming enhances salinity tolerance of Oryza sativa seedlings. Protoplasma 2019; 256:79-99. [PMID: 29984388 DOI: 10.1007/s00709-018-1279-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 06/15/2018] [Indexed: 05/06/2023]
Abstract
The present study was designed to highlight the effects of cold plasma (10 kV) treatment and priming with 2 mM salicylic acid (SA) and their combination (10 kV of plasma + 2 mM SA) on the physiological parameters and metabolism of two cultivars of Oryza sativa, i.e., Zhu Liang You 06 (ZY) and Qian You No. 1 (QY), under salinity stress (150 mM NaCl) and normal growth condition (0 mM NaCl). Seed germination and seedling growth were enhanced by SA priming and cold plasma treatment either alone or in combination under salinity stress. Photosynthetic pigments, photosynthetic gas exchange, and chlorophyll fluorescence were improved by cold plasma treatment and SA priming under salinity stress as compared to the untreated seeds. The activities of antioxidant enzymes were significantly improved by the combination of SA priming and cold plasma treatment in both cultivars under salinity stress. There were rapid changes in the cellular content of sodium (Na+) and calcium (Ca+), where the plants grown under saline conditions accumulate more Na+ and less Ca+ contents resulting in ionic imbalances. Interestingly, cold plasma and SA treatments diminished this action by reducing Na+ accumulation and increasing K+ and Ca+ contents in the plant cell under salinity stress. The activities of enzymes involved in secondary metabolism assimilation were up-regulated with cold plasma and SA priming either alone or combination under salinity stress. An increase in reactive oxygen species (ROS) accumulation and malondialdehyde (MDA) content was also observed under salinity stress condition. On contrast, seed treated with SA and plasma alone or combined resulted in a significant decrease in ROS and MDA contents under salinity stress. Our results indicated that SA priming and cold plasma treatment either alone or combined improved plant uptake of nutrients in both cultivars under stress conditions. The ultrastructural changes were observed to be more prominent in ZY than QY cultivar. Plants without SA priming or cold plasma treatments have a big vacuole due to the movement of ions into the vacuole directly from the apoplast into the vacuole through membrane vesiculation leading to membrane destabilization. However, SA priming and cold plasma treatment alone or combined helped the plants to recover their cell turgidity under salinity stress.
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Affiliation(s)
- Mohamed S Sheteiwy
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
- Department of Agronomy, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt
| | - Jianyu An
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Mengqi Yin
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Xiaowen Jia
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yajing Guan
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
| | - Fei He
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jin Hu
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
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220
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Scharf C, Eymann C, Emicke P, Bernhardt J, Wilhelm M, Görries F, Winter J, von Woedtke T, Darm K, Daeschlein G, Steil L, Hosemann W, Beule A. Improved Wound Healing of Airway Epithelial Cells Is Mediated by Cold Atmospheric Plasma: A Time Course-Related Proteome Analysis. Oxid Med Cell Longev 2019; 2019:7071536. [PMID: 31223425 PMCID: PMC6541959 DOI: 10.1155/2019/7071536] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 01/28/2019] [Indexed: 01/08/2023]
Abstract
The promising potential of cold atmospheric plasma (CAP) treatment as a new therapeutic option in the field of medicine, particularly in Otorhinolaryngology and Respiratory medicine, demands primarily the assessment of potential risks and the prevention of any direct and future cell damages. Consequently, the application of a special intensity of CAP that is well tolerated by cells and tissues is of particular interest. Although improvement of wound healing by CAP treatment has been described, the underlying mechanisms and the molecular influences on human tissues are so far only partially characterized. In this study, human S9 bronchial epithelial cells were treated with cold plasma of atmospheric pressure plasma jet that was previously proven to accelerate the wound healing in a clinically relevant extent. We studied the detailed cellular adaptation reactions for a specified plasma intensity by time-resolved comparative proteome analyses of plasma treated vs. nontreated cells to elucidate the mechanisms of the observed improved wound healing and to define potential biomarkers and networks for the evaluation of plasma effects on human epithelial cells. K-means cluster analysis and time-related analysis of fold-change factors indicated concordantly clear differences between the short-term (up to 1 h) and long-term (24-72 h) adaptation reactions. Thus, the induction of Nrf2-mediated oxidative and endoplasmic reticulum stress response, PPAR-alpha/RXR activation as well as production of peroxisomes, and prevention of apoptosis already during the first hour after CAP treatment are important cell strategies to overcome oxidative stress and to protect and maintain cell integrity and especially microtubule dynamics. After resolving of stress, when stress adaptation was accomplished, the cells seem to start again with proliferation and cellular assembly and organization. The observed strategies and identification of marker proteins might explain the accelerated wound healing induced by CAP, and these indicators might be subsequently used for risk assessment and quality management of application of nonthermal plasma sources in clinical settings.
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Affiliation(s)
- Christian Scharf
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
| | - Christine Eymann
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
| | - Philipp Emicke
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
| | - Jörg Bernhardt
- 2Institute for Microbiology, University of Greifswald, Germany
| | - Martin Wilhelm
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
| | - Fabian Görries
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
| | - Jörn Winter
- 3Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
| | - Thomas von Woedtke
- 3Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
- 4Department of Hygiene and Environmental Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Katrin Darm
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
| | - Georg Daeschlein
- 5Department of Dermatology, University Medicine Greifswald, Greifswald, Germany
| | - Leif Steil
- 6Interfaculty Institute of Genetics and Functional Genomics, University of Greifswald, Germany
| | - Werner Hosemann
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
| | - Achim Beule
- 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medicine Greifswald, Germany
- 7Department of Otorhinolaryngology, University Hospital Münster, Münster, Germany
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Yu H, Wang Y, Wang S, Li X, Li W, Ding D, Gong X, Keidar M, Zhang W. Paclitaxel-Loaded Core-Shell Magnetic Nanoparticles and Cold Atmospheric Plasma Inhibit Non-Small Cell Lung Cancer Growth. ACS Appl Mater Interfaces 2018; 10:43462-43471. [PMID: 30375840 DOI: 10.1021/acsami.8b16487] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanoparticle-based drug delivery allows effective and sustained delivery of therapeutic agents to solid tumors and has completely changed how cancer is treated. As a new technology for medical applications, cold atmospheric plasma (CAP) shows a great potential in selective cancer treatment. The aim of this work is to develop a new dual cancer treatment approach by integrating CAP with novel paclitaxel (PTX)-loaded nanoparticles for targeting A549 cells. For this purpose, PTX-loaded core-shell magnetic nanoparticles were prepared through coaxial electrospraying, and various characteristics were investigated. Biodegradable poly(lactic- co-glycolic acid) was selected as the polymer shell to encapsulate the anticancer therapeutics. Results demonstrated a uniform size distribution and high drug encapsulation efficiency of the electrosprayed nanoparticles, which had sustained release characteristics and a variety of excellent properties. An in vitro study showed that PTX-loaded nanoparticles and CAP synergistically inhibited the growth of A549 cells more effectively than when each was used individually. We also found that CAP could induce the PTX-loaded nanoparticles in tumor cells to increase the effective drug concentration to a level that might be conducive to reduce drug resistance. Therefore, the integration of PTX-encapsulated nanoparticles and CAP provides a promising tool for the development of a new non-small cell lung cancer treatment strategy.
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Affiliation(s)
- Hongli Yu
- College of Pharmacy , Weifang Medical University , Weifang 261053 , Shandong , China
| | - Yonghong Wang
- College of Pharmacy , Weifang Medical University , Weifang 261053 , Shandong , China
| | - Saisai Wang
- College of Pharmacy , Weifang Medical University , Weifang 261053 , Shandong , China
| | - Xujing Li
- Department of Pathology , Weifang Medical University , Weifang 261053 , Shandong , China
| | - Wentong Li
- Department of Pathology , Weifang Medical University , Weifang 261053 , Shandong , China
| | - Dejun Ding
- College of Pharmacy , Weifang Medical University , Weifang 261053 , Shandong , China
| | - Xiaoming Gong
- Weifang Entry-Exit Inspection and Quarantine Bureau , Weifang 261041 , Shandong , China
| | - Michael Keidar
- Department of Mechanical and Aerospace Engineering , The George Washington University , Washington , District of Columbia 20052 , United States
| | - Weifen Zhang
- College of Pharmacy , Weifang Medical University , Weifang 261053 , Shandong , China
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222
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Moniruzzaman R, Rehman MU, Zhao QL, Jawaid P, Mitsuhashi Y, Imaue S, Fujiwara K, Ogawa R, Tomihara K, Saitoh JI, Noguchi K, Kondo T, Noguchi M. Roles of intracellular and extracellular ROS formation in apoptosis induced by cold atmospheric helium plasma and X-irradiation in the presence of sulfasalazine. Free Radic Biol Med 2018; 129:537-547. [PMID: 30355525 DOI: 10.1016/j.freeradbiomed.2018.10.434] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/11/2018] [Accepted: 10/19/2018] [Indexed: 12/11/2022]
Abstract
Sulfasalazine (SSZ) is a well-known anti-inflammatory drug and also an inhibitor of the cystine-glutamate antiporter that is known to reduce intracellular glutathione (GSH) level and increase cellular oxidative stress, indicating its anti-tumor potential. However, the combination of SSZ with other physical modalities remains unexplored. Here, the effects of SSZ on cold atmospheric helium plasma (He-CAP), which produces approximately 24 x higher concentration of hydroxyl radicals (. OH) compared to X-irradiation (IR) in aqueous solution, and on IR-induced apoptosis in human leukemia Molt-4 cells were studied to elucidate the mechanism of apoptosis enhancement. Both the Annexin V-FITC/PI and DNA fragmentation assay revealed that pre-treatment of cells with SSZ significantly enhanced He-CAP and IR-induced apoptosis. Similar enhancement was observed during the loss of mitochondrial membrane potential, intracellular Ca2+ ions, and mitochondria- and endoplasmic reticulum-related proteins. The concentration of intracellular reactive oxygen species (ROS) was much higher in He-CAP treated cells than in X-irradiated cells. On the other hand, strong enhancement of Fas expression and caspase-8 and -3 activities were only observed in X-irradiated cells. It might be possible that the higher concentration of intracellular and extracellular ROS suppressed caspase activities and Fas expression in He-CAP-treated cells. Notably, pretreating the cells with an antioxidant N-acetyl-L-cysteine (NAC) dramatically decreased apoptosis in cells treated by He-CAP, but not by IR. These results suggest that IR-induced apoptosis is due to specific and effective ROS distribution since intracellular ROS formation is marginal and the high production of ROS inside and outside of cells plays unique roles in He-CAP induced apoptosis. We conclude that our data provides efficacy and mechanistic insights for SSZ, which might be helpful for establishing SSZ as a future sensitizer in He-CAP or IR therapy for cancer.
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Affiliation(s)
- Rohan Moniruzzaman
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Mati Ur Rehman
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Qing-Li Zhao
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Paras Jawaid
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Yohei Mitsuhashi
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Shuichi Imaue
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kumiko Fujiwara
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Ryohei Ogawa
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kei Tomihara
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Jun-Ichi Saitoh
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kyo Noguchi
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Takashi Kondo
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Makoto Noguchi
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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Abstract
In recent decades, the non-thermal plasma, i.e. partially or completely ionized gas produced by electric discharges at ambient temperature, has become of interest for its microbiocidal properties with potential of use in the food industry or medicine. Recently, this interest focuses not only on the planktonic forms of microorganisms but also on their biofilms. The works in this interdisciplinary field are summarized in this review. The wide range of biofilm-plasma interactions is divided into studies of general plasma action on bacteria, on biofilm and on its oral and dental application; a short overview of plasma instrumentation is also included. In addition, not only biofilm combating but also an important area of biofilm prevention is discussed. Various DC discharges of the point-to-plane type. Author's photograph, published in Khun et al. (Plasma Sources Sci Technol 27:065002, 2018).
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Affiliation(s)
- Jaroslav Julák
- Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University and General University Hospital, Studničkova 7, 128 00, Prague 2, Czech Republic.
| | - Vladimír Scholtz
- Department of Physics and Measurements, University of Chemistry and Technology, Technická 5, 166 28, Prague 6, Czech Republic
| | - Eva Vaňková
- Department of Biotechnology, University of Chemistry and Technology, Technická 5, 166 28, Prague 6, Czech Republic
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224
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Farasat M, Arjmand S, Ranaei Siadat SO, Sefidbakht Y, Ghomi H. The effect of non-thermal atmospheric plasma on the production and activity of recombinant phytase enzyme. Sci Rep 2018; 8:16647. [PMID: 30413721 PMCID: PMC6226467 DOI: 10.1038/s41598-018-34239-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 10/15/2018] [Indexed: 12/31/2022] Open
Abstract
Atmospheric pressure cold plasma (ACP) is introduced as a useful tool in a variety of biological applications. Proteins are the most abundant macromolecules in living systems with a central role in all biological processes. These organic molecules are modified by ACP exposure that is responsible for many of ACP's biological effects. This study evaluated the effect of ACP on the production of recombinant phytase in yeast Pichia pastoris (P. pastoris) as well as the structure and function of the phytase enzyme. The results indicated that yeast cells treated with ACP, directly or indirectly, produced higher amounts of recombinant phytase, which was associated with the time of ACP treatment. The exposure of commercial phytase solution with ACP caused a significant increase in the enzyme activity (125%) after 4 hours. Evaluation of the phytase solution by far- and near-UV circular dichroism (CD) and fluorescence analysis indicated that this protein maintained its secondary structure when exposed to ACP while the tertiary structure was slightly unfolded. The effects of heat and H2O2 on the phytase structure and function were compared with the effect of ACP treatment. The modification of Cys, Tyr and Trp amino acids upon reactive oxygen/nitrogen spices was simulated using a molecular dynamics approach. RMSF and RMSD analysis suggested that this structural alteration occurs owing to changes made by reactive species in accessible amino acids.
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Affiliation(s)
- Mahsa Farasat
- Laser and Plasma research Institute, Shahid Beheshti University, G. C., Tehran, Iran
| | - Sareh Arjmand
- Protein Research Center, Shahid Beheshti University, G. C., Tehran, Iran.
| | | | - Yahya Sefidbakht
- Protein Research Center, Shahid Beheshti University, G. C., Tehran, Iran
| | - Hamid Ghomi
- Laser and Plasma research Institute, Shahid Beheshti University, G. C., Tehran, Iran
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225
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Zhang Q, Zhang H, Zhang Q, Huang Q. Degradation of norfloxacin in aqueous solution by atmospheric-pressure non-thermal plasma: Mechanism and degradation pathways. Chemosphere 2018; 210:433-439. [PMID: 30025360 DOI: 10.1016/j.chemosphere.2018.07.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/07/2018] [Accepted: 07/08/2018] [Indexed: 06/08/2023]
Abstract
Norfloxacin is a synthetic antibiotics drug which is widely used in the treatment of infectious diseases and also often carelessly released into natural environment resulting in antibiotics-contaminated wastewater. In this work, we employed atmospheric-pressure non-thermal dielectric barrier discharge (DBD) to treat norfloxacin-contaminated water and investigated the degradation efficiency and mechanism for the plasma treatments under different conditions with varied working gas atmospheres. Our results showed that the DBD efficiency for norfloxacin degradation depended on reactive oxygen/nitrogen species (RONS) produced in the plasma treatment, while the plasma-induced hydroxyl radical played a critical role in the norfloxacin degradation. For O2-DBD, except for the contribution from reactive oxygen species (ROS), ozone could also play an important role. For N2-DBD, reactive nitrogen species (RNS) could work synergistically with H2O2 to enhance the degradation effect. We also checked the plasma activated liquid (PAL) effect and analyzed the degradation products so that the degradation mechanism and pathways could be elucidated. This work may therefore provide the guidance for effective and feasible application of low-temperature plasma technology in treatment of antibiotics-contaminated wastewater.
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Affiliation(s)
- Qifu Zhang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, PR China; University of Science & Technology of China, Hefei, Anhui 230026, PR China
| | - Hong Zhang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, PR China
| | - Qunxia Zhang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, PR China; University of Science & Technology of China, Hefei, Anhui 230026, PR China
| | - Qing Huang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, PR China; University of Science & Technology of China, Hefei, Anhui 230026, PR China.
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226
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Handorf O, Weihe T, Bekeschus S, Graf AC, Schnabel U, Riedel K, Ehlbeck J. Nonthermal Plasma Jet Treatment Negatively Affects the Viability and Structure of Candida albicans SC5314 Biofilms. Appl Environ Microbiol 2018; 84:e01163-18. [PMID: 30143511 PMCID: PMC6193392 DOI: 10.1128/aem.01163-18] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/15/2018] [Indexed: 11/20/2022] Open
Abstract
Microorganisms are predominantly organized in biofilms, where cells live in dense communities and are more resistant to external stresses than are their planktonic counterparts. With in vitro experiments, the susceptibility of Candida albicans biofilms to a nonthermal plasma treatment (plasma source, kINPen09) in terms of growth, survival, and cell viability was investigated. C. albicans strain SC5314 (ATCC MYA-2876) was plasma treated for different time periods (30 s, 60 s, 120 s, 180 s, 300 s). The results of the experiments, encompassing CFU, fluorescence Live/Dead, and 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide salt (XTT) assays, revealed a negative influence of the plasma treatment on the proliferation ability, vitality, and metabolism of C. albicans biofilms, respectively. Morphological analysis of plasma-treated biofilms using atomic force microscopy supported the indications for lethal plasma effects concomitant with membrane disruptions and the loss of intracellular fluid. Yielding controversial results compared to those of other publications, fluorescence and confocal laser scanning microscopic inspection of plasma-treated biofilms indicated that an inactivation of cells appeared mainly on the bottom of the biofilms. If this inactivation leads to a detachment of the biofilms from the overgrown surface, it might offer completely new approaches in the plasma treatment of biofilms. Because of plasma's biochemical-mechanical mode of action, resistance of microbial cells against plasma is unknown at this state of research.IMPORTANCE Microbial communities are an increasing problem in medicine but also in industry. Thus, an efficient and rapid removal of biofilms is becoming increasingly important. With the aid of the kINPen09, a radiofrequency plasma jet (RFPJ) instrument, decisive new findings on the effects of plasma on C. albicans biofilms were obtained. This work showed that the inactivation of biofilms takes place mainly on the bottom, which in turn offers new possibilities for the removal of biofilms by other strategies, e.g., mechanical treatment. This result demonstrated that nonthermal atmospheric pressure plasma is well suited for biofilm decontamination.
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Affiliation(s)
- O Handorf
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
| | - T Weihe
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
| | - S Bekeschus
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
| | - A C Graf
- Ernst Moritz Arndt University, Microbial Physiology and Molecular Biology, Greifswald, Germany
| | - U Schnabel
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
| | - K Riedel
- Ernst Moritz Arndt University, Microbial Physiology and Molecular Biology, Greifswald, Germany
| | - J Ehlbeck
- Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
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227
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Griffin M, Palgrave R, Baldovino-Medrano VG, Butler PE, Kalaskar DM. Argon plasma improves the tissue integration and angiogenesis of subcutaneous implants by modifying surface chemistry and topography. Int J Nanomedicine 2018; 13:6123-6141. [PMID: 30349241 PMCID: PMC6181122 DOI: 10.2147/ijn.s167637] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Tissue integration and vessel formation are important criteria for the successful implantation of synthetic biomaterials for subcutaneous implantation. OBJECTIVE We report the optimization of plasma surface modification (PSM) using argon (Ar), oxygen (O2) and nitrogen (N2) gases of a polyurethane polymer to enhance tissue integration and angiogenesis. METHODS The scaffold's bulk and surface characteristics were compared before and after PSM with either Ar, O2 and N2. The viability and adhesion of human dermal fibroblasts (HDFs) on the modified scaffolds were compared. The formation of extracellular matrix by the HDFs on the modified scaffolds was evaluated. Scaffolds were subcutaneously implanted in a mouse model for 3 months to analyze tissue integration, angiogenesis and capsule formation. RESULTS Surface analysis demonstrated that interfacial modification (chemistry, topography and wettability) achieved by PSM is unique and varies according to the gas used. O2 plasma led to extensive changes in interfacial properties, whereas Ar treatment caused moderate changes. N2 plasma caused the least effect on surface chemistry of the polymer. PSM-treated scaffolds significantly (P<0.05) enhanced HDF activity and growth over 21 days. Among all three gases, Ar modification showed the highest protein adsorption. Ar-modified scaffolds also showed a significant upregulation of adhesion-related proteins (vinculin, focal adhesion kinase, talin and paxillin; P<0.05) and extracellular matrix marker genes (collagen type I, fibronectin, laminin and elastin) and deposition of associated proteins by the HDFs. Subcutaneous implantation after 3 months demonstrated the highest tissue integration and angiogenesis and the lowest capsule formation on Ar-modified scaffolds compared with O2- and N2-modified scaffolds. CONCLUSION PSM using Ar is a cost-effective and efficient method to improve the tissue integration and angiogenesis of subcutaneous implants.
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Affiliation(s)
- Michelle Griffin
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, UK,
- Royal Free London NHS Foundation Trust Hospital, London, UK
- The Charles Wolfson Center for Reconstructive Surgery, Royal Free London NHS Foundation Trust Hospital, London, UK
| | - Robert Palgrave
- Department of Chemistry, University College London, London, UK
| | | | - Peter E Butler
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, UK,
- Royal Free London NHS Foundation Trust Hospital, London, UK
- The Charles Wolfson Center for Reconstructive Surgery, Royal Free London NHS Foundation Trust Hospital, London, UK
| | - Deepak M Kalaskar
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, UK,
- UCL Institute of Orthopaedics and Musculoskeletal Science, Division of Surgery and Interventional Science, University College London, London, UK,
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228
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Hanbal SE, Takashima K, Miyashita S, Ando S, Ito K, Elsharkawy MM, Kaneko T, Takahashi H. Atmospheric-pressure plasma irradiation can disrupt tobacco mosaic virus particles and RNAs to inactivate their infectivity. Arch Virol 2018; 163:2835-2840. [PMID: 29948382 DOI: 10.1007/s00705-018-3909-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/27/2018] [Indexed: 11/24/2022]
Abstract
Low-temperature atmospheric-pressure air plasma is a source of charged and neutral gas species. In this study, N-carrying tobacco plants were inoculated with plasma irradiated and non-irradiated tobacco mosaic virus (TMV) solution, resulting in necrotic local lesions on non-irradiated, but not on irradiated, TMV-inoculated leaves. Virus particles were disrupted by plasma irradiation in an exposure-dependent manner, but the viral coat protein subunit was not. TMV RNA was also fragmented in a time-dependent manner. These results indicate that plasma irradiation of TMV can collapse viral particles to the subunit level, degrading TMV RNA and thereby leading to a loss of infectivity.
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Grants
- 16H06429 Scientific Research on Innovative Areas from the Ministry of Education, Culture, Science, Sports and Technology (MEXT), Japan
- 16K21723 Scientific Research on Innovative Areas from the Ministry of Education, Culture, Science, Sports and Technology (MEXT), Japan
- 16H06435 Scientific Research on Innovative Areas from the Ministry of Education, Culture, Science, Sports and Technology (MEXT), Japan
- Establishment of international agricultural immunology research-core for a quantum improvement in food safety The Japan Society for the Promotion of Science (JSPS) through the JSPS Core-to-Core Program (Advanced Research Networks)
- Channel System Program Egyptian Government
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Affiliation(s)
- Sara E Hanbal
- Graduate School of Agricultural Science, Tohoku University, 468-1, Aramaki-Aza- Aoba, Sendai, 980-0845, Japan
- Department of Virus and Phytoplasma, Plant Pathology Research Institute, Agriculture Research Center, Giza, 12619, Egypt
| | - Keisuke Takashima
- Graduate School of Engineering, Tohoku University, 6-6-05 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Shuhei Miyashita
- Graduate School of Agricultural Science, Tohoku University, 468-1, Aramaki-Aza- Aoba, Sendai, 980-0845, Japan
| | - Sugihiro Ando
- Graduate School of Agricultural Science, Tohoku University, 468-1, Aramaki-Aza- Aoba, Sendai, 980-0845, Japan
| | - Kumiko Ito
- Graduate School of Agricultural Science, Tohoku University, 468-1, Aramaki-Aza- Aoba, Sendai, 980-0845, Japan
| | - Mohsen M Elsharkawy
- Department of Agricultural Botany, Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt
| | - Toshiro Kaneko
- Graduate School of Engineering, Tohoku University, 6-6-05 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
| | - Hideki Takahashi
- Graduate School of Agricultural Science, Tohoku University, 468-1, Aramaki-Aza- Aoba, Sendai, 980-0845, Japan.
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229
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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230
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Xiang L, Xu X, Zhang S, Cai D, Dai X. Cold atmospheric plasma conveys selectivity on triple negative breast cancer cells both in vitro and in vivo. Free Radic Biol Med 2018; 124:205-213. [PMID: 29870749 DOI: 10.1016/j.freeradbiomed.2018.06.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 05/17/2018] [Accepted: 06/02/2018] [Indexed: 01/27/2023]
Abstract
Breast cancers are heterogeneous, with the triple negative subtype being the most aggressive and lack of effective therapy. Cold atmospheric plasma has become a promising onco-therapeutic approach as demonstrated by many pre-clinical studies. We found from both in vitro and in vivo experiments that plasma-activated medium could selectively induce the apoptosis, inhibit the proliferation and migration of triple negative breast cancers rather than the other subtypes. We propose that it is the accelerated genome mutation rate, hyper-activated MAPK/JNK and NF-kB pathways of triple negative breast cancers that make them more vulnerable to plasma treatment than non-triple negative tumors, and MAPK/JNK and NF-κB signalings in response to reactive oxygen species generated by plasma that play deterministic roles in this differential therapeutic response. Our work contributes in establishing a correlation between plasma efficacy and cancer subtypes, which facilitates the clinical translation of plasma as a precision medicinal approach.
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Affiliation(s)
| | - Xiaoyu Xu
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi, China
| | - Shuo Zhang
- School of Biotechnology, Jiangnan University, Wuxi, China
| | - Dongyan Cai
- Wuxi School of Medicine, Jiangnan University, Wuxi, China; Department of Oncology, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Xiaofeng Dai
- Wuxi School of Medicine, Jiangnan University, Wuxi, China; School of Biotechnology, Jiangnan University, Wuxi, China.
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231
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Cheng KY, Lin ZH, Cheng YP, Chiu HY, Yeh NL, Wu TK, Wu JS. Wound Healing in Streptozotocin-Induced Diabetic Rats Using Atmospheric-Pressure Argon Plasma Jet. Sci Rep 2018; 8:12214. [PMID: 30111887 PMCID: PMC6093903 DOI: 10.1038/s41598-018-30597-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 07/31/2018] [Indexed: 12/28/2022] Open
Abstract
In this study, we used an argon-based round atmospheric-pressure plasma jet (APPJ) for enhancing wound healing in streptozotocin (STZ) induced diabetic rats. The APPJ was characterized by optical emission spectroscopy. We induced Type 1 and Type 2 diabetes in rats with different amounts of STZ combined with normal and high-fat diets, respectively. The wound area ratio of all the plasma-treated normal and diabetic groups was greatly reduced (up to 30%) compared with that of the untreated groups during healing. Histological analysis revealed faster re-epithelialization, collagen deposition, less inflammation, and a complete skin structure in the plasma-treated groups was found as compared with the untreated control groups. In addition, the new blood vessels of plasma-treated tissues decreased more than untreated tissues in the middle (Day 14) and late (Day 21) stages of wound healing. The plasma-treated wounds demonstrated more transforming growth factor beta (TGF-β) expression in the early stage (Day 7), whereas they decreased in the middle and late stages of wound healing. The levels of superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase (CAT) increased after plasma treatment. In addition, plasma-treated water had a higher concentration of hydrogen peroxide, nitrite and nitrate when the plasma treatment time was longer. In summary, the proposed argon APPJ based on the current study could be a potential tool for treating diabetic wounds.
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Affiliation(s)
- Kuang-Yao Cheng
- Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu, 300, Taiwan
| | - Zhi-Hua Lin
- Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu, 300, Taiwan
| | - Yu-Pin Cheng
- Department of Biological Science and Technology, National Chiao Tung University, 75 Bo-Ai Street, Hsinchu, 300, Taiwan
- Department of Dermatology, Cathay General Hospital, 280 Renai Road Section 4, Taipei, 106, Taiwan
| | - Hsien-Yi Chiu
- Department of Dermatology, National Taiwan University Hospital Hsinchu Branch, 25 Jingguo Road Section 1 Lane 442, Hsinchu, 300, Taiwan
| | - Nai-Lun Yeh
- Department of Family Medicine, National Taiwan University Hospital Hsinchu Branch, 25 Jingguo Road Section 1 Lane 442, Hsinchu, 300, Taiwan
| | - Tung-Kung Wu
- Department of Biological Science and Technology, National Chiao Tung University, 75 Bo-Ai Street, Hsinchu, 300, Taiwan
| | - Jong-Shinn Wu
- Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu, 300, Taiwan.
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232
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Attri P, Han J, Choi S, Choi EH, Bogaerts A, Lee W. CAP modifies the structure of a model protein from thermophilic bacteria: mechanisms of CAP-mediated inactivation. Sci Rep 2018; 8:10218. [PMID: 29977069 PMCID: PMC6033864 DOI: 10.1038/s41598-018-28600-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 06/19/2018] [Indexed: 12/14/2022] Open
Abstract
Cold atmospheric plasma (CAP) has great potential for sterilization in the food industry, by deactivation of thermophilic bacteria, but the underlying mechanisms are largely unknown. Therefore, we investigate here whether CAP is able to denature/modify protein from thermophilic bacteria. We focus on MTH1880 (MTH) from Methanobacterium thermoautotrophicum as model protein, which we treated with dielectric barrier discharge (DBD) plasma operating in air for 10, 15 and 20 mins. We analysed the structural changes of MTH using circular dichroism, fluorescence and NMR spectroscopy, as well as the thermal and chemical denaturation, upon CAP treatment. Additionally, we performed molecular dynamics (MD) simulations to determine the stability, flexibility and solvent accessible surface area (SASA) of both the native and oxidised protein.
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Affiliation(s)
- Pankaj Attri
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610, Antwerp, Belgium
| | - Jeongmin Han
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul, 120-749, Korea
| | - Sooho Choi
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul, 120-749, Korea
| | - Eun Ha Choi
- Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 01897, Korea
| | - Annemie Bogaerts
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610, Antwerp, Belgium.
| | - Weontae Lee
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul, 120-749, Korea.
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233
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Schneider C, Gebhardt L, Arndt S, Karrer S, Zimmermann JL, Fischer MJM, Bosserhoff AK. Cold atmospheric plasma causes a calcium influx in melanoma cells triggering CAP-induced senescence. Sci Rep 2018; 8:10048. [PMID: 29968804 PMCID: PMC6030087 DOI: 10.1038/s41598-018-28443-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 06/22/2018] [Indexed: 01/26/2023] Open
Abstract
Cold atmospheric plasma (CAP) is a promising approach in anti-cancer therapy, eliminating cancer cells with high selectivity. However, the molecular mechanisms of CAP action are poorly understood. In this study, we investigated CAP effects on calcium homeostasis in melanoma cells. We observed increased cytoplasmic calcium after CAP treatment, which also occurred in the absence of extracellular calcium, indicating the majority of the calcium increase originates from intracellular stores. Application of previously CAP-exposed extracellular solutions also induced cytoplasmic calcium elevations. A substantial fraction of this effect remained when the application was delayed for one hour, indicating the chemical stability of the activating agent(s). Addition of ryanodine and cyclosporin A indicate the involvement of the endoplasmatic reticulum and the mitochondria. Inhibition of the cytoplasmic calcium elevation by the intracellular chelator BAPTA blocked CAP-induced senescence. This finding helps to understand the molecular influence and the mode of action of CAP on tumor cells.
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Affiliation(s)
- Christin Schneider
- Institute of Biochemistry, Emil-Fischer-Center, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Lisa Gebhardt
- Institute of Physiology and Pathophysiology, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Stephanie Arndt
- Department of Dermatology, University Hospital of Regensburg, Regensburg, Germany
| | - Sigrid Karrer
- Department of Dermatology, University Hospital of Regensburg, Regensburg, Germany
| | | | - Michael J M Fischer
- Institute of Physiology and Pathophysiology, University of Erlangen-Nürnberg, Erlangen, Germany
- Institute of Physiology, Medical University of Vienna, Vienna, Austria
| | - Anja-Katrin Bosserhoff
- Institute of Biochemistry, Emil-Fischer-Center, University of Erlangen-Nürnberg, Erlangen, Germany.
- Comprehensive Cancer Center (CCC) Erlangen-EMN, Erlangen, Germany.
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234
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Borges AC, Lima GDMG, Nishime TMC, Gontijo AVL, Kostov KG, Koga-Ito CY. Amplitude-modulated cold atmospheric pressure plasma jet for treatment of oral candidiasis: In vivo study. PLoS One 2018; 13:e0199832. [PMID: 29949638 PMCID: PMC6021106 DOI: 10.1371/journal.pone.0199832] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 06/14/2018] [Indexed: 01/14/2023] Open
Abstract
The aim of this study was to establish an effective and safe protocol for in vivo oral candidiasis treatment with atmospheric plasma jets. A novel amplitude-modulated cold atmospheric pressure plasma jet (AM-CAPPJ) device, operating with Helium, was tested. In vitro assays with Candida albicans biofilms and Vero cells were performed in order to determine the effective parameters with low cytotoxicity. After the determination of such parameters, the protocol was evaluated in experimentally induced oral candidiasis in mice. AM-CAPPJ could significantly reduce the viability of C. albicans biofilms after 5 minutes of plasma exposure when compared to the non-exposed group (p = 0.0033). After this period of exposure, high viability of Vero cells was maintained (86.33 ± 10.45%). Also, no late effects on these cells were observed after 24 and 48 hours (83.24±15.23% and 88.96±18.65%, respectively). Histological analyses revealed significantly lower occurrence of inflammatory alterations in the AM-CAPPJ group when compared to non-treated and nystatin-treated groups (p < 0.0001). Although no significant differences among the values of CFU/tongue were observed among the non-treated group and the groups treated with AM-CAPPJ or nystatin (p = 0.3201), histological analyses revealed marked reduction in candidal tissue invasion. In conclusion, these results point out to a clinical applicability of this protocol, due to the simultaneous anti-inflammatory and inhibitory effects of AM-CAPPJ with low cytotoxicity.
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Affiliation(s)
- Aline Chiodi Borges
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Gabriela de Morais Gouvêa Lima
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | | | - Aline Vidal Lacerda Gontijo
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Konstantin Georgiev Kostov
- Department of Chemistry and Physics, Guaratinguetá Faculty of Engineering, São Paulo State University (UNESP), Guaratinguetá, Brazil
| | - Cristiane Yumi Koga-Ito
- Department of Environmental Engineering and Oral Biopathology Graduate Program, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
- * E-mail:
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235
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Stratakos AC, Grant IR. Evaluation of the efficacy of multiple physical, biological and natural antimicrobial interventions for control of pathogenic Escherichia coli on beef. Food Microbiol 2018; 76:209-218. [PMID: 30166143 DOI: 10.1016/j.fm.2018.05.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 05/23/2018] [Accepted: 05/25/2018] [Indexed: 12/26/2022]
Abstract
Antimicrobial effects of multiple physical, biological and natural interventions on pathogenic Escherichia coli in raw beef were assessed. A cocktail of E. coli strains was inoculated onto gamma-irradiated beef and enumerated immediately after each intervention and during storage at 4 °C for 7 days. Of the physical interventions, silver-containing antimicrobial packaging and ozone gas treatment did not show significant antimicrobial effects, however cold plasma treatment reduced E. coli levels by 0.9 and 1.82 log10 CFU/cm2 after 2 and 5 min treatments, respectively. A phage cocktail reduced E. coli counts by 0.63 and 1.16 log10 CFU/g after 24 h storage at 4 and 12 °C, respectively. Of the natural interventions, vinegar and lactic acid (5%) washes for 5 min caused reductions of ∼1 log10 CFU/g immediately after treatment, whereas lactoferrin and nisin treatments, separately or in combination, had insignificant antimicrobial effects. Nanoemulsions containing carvacrol or thyme essential oils caused immediate E. coli reductions of 1.41 and 1.36 log10 CFU/g, respectively, plus a progressive reduction in viable numbers during storage at 4 °C. Our findings suggest that cold plasma, bacteriophages, vinegar, lactic acid, or carvacrol and thyme essential oil nanoemulsions could potentially be of use to the beef industry for controlling pathogenic E. coli contamination.
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Affiliation(s)
- Alexandros Ch Stratakos
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, UK
| | - Irene R Grant
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, UK.
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236
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Lis KA, Boulaaba A, Binder S, Li Y, Kehrenberg C, Zimmermann JL, Klein G, Ahlfeld B. Inactivation of Salmonella Typhimurium and Listeria monocytogenes on ham with nonthermal atmospheric pressure plasma. PLoS One 2018; 13:e0197773. [PMID: 29795627 PMCID: PMC5967798 DOI: 10.1371/journal.pone.0197773] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 05/08/2018] [Indexed: 11/19/2022] Open
Abstract
The application of cold atmospheric pressure plasma (CAP) for decontamination of sliced ready-to-eat (RTE) meat products (in this case, rolled fillets of ham), inoculated with Salmonella (S.) Typhimurium and Listeria (L.) monocytogenes was investigated. Cold atmospheric plasma (CAP) is an ionised gas that includes highly reactive species and ozone, interacting with cell membranes and DNA of bacteria. The mode of action of CAPs includes penetration and disruption of the outer cell membrane or intracellular destruction of DNA located in the cytoplasm. Inoculated ham was treated for 10 and 20 min with CAP generated by a surface-micro-discharge-plasma source using cost-effective ambient air as working gas with different humidity levels of 45–50 and 90%. The chosen plasma modes had a peak-to-peak voltage of 6.4 or 10 kV and a frequency of 2 and 10 kHz. Under the tested conditions, the direct effectiveness of CAP on microbial inactivation was limited. Although all treated samples showed significant reductions in the microbial load subsequent to plasma treatment, the maximum inactivation of S. Typhimurium was 1.14 lg steps after 20 min of CAP-treatment (p<0.05), and L. monocytogenes was reduced by 1.02 lg steps (p<0.05) using high peak-to-peak voltage of 10 kV and a frequency of 2 kHz regardless of moisture content. However, effective inactivation was achieved by a combination of CAP-treatment and cold storage at 8°C ± 0.5°C for 7 and 14 days after packaging under sealed high nitrogen gas flush (70% N2, 30% CO2). Synergistic effects of CAP and cold storage for 14 days led to a clearer decrease in the microbial load of 1.84 lg steps for S. Typhimurium (p<0.05) and 2.55 lg steps for L. monocytogenes (p<0.05). In the case of L. monocytogenes, subsequent to CAP-treatment (10 kV, 2 kHz) and cold storage, microbial counts were predominantly below the detection limit. Measurement showed that after CAP-treatment, surface temperature of ham did not exceed the room temperature of 22°C ± 2°C. With the application of humidity levels of 45–50%, the colour distance ΔE increased in CAP treated samples due to a decrease in L* values. In conclusion, effectiveness of CAP-treatment was limited. However, the combination of CAP-treatment and cold storage of samples under modified-atmospheric-conditions up to 14 days could significantly reduce microorganisms on RTE ham. Further investigations are required to improve effectiveness of CAP-treatment.
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Affiliation(s)
- Karolina Anna Lis
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Annika Boulaaba
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
- * E-mail:
| | | | | | - Corinna Kehrenberg
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | | | - Günter Klein
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Birte Ahlfeld
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
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237
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Razavi M, Thakor AS. An oxygen plasma treated poly(dimethylsiloxane) bioscaffold coated with polydopamine for stem cell therapy. J Mater Sci Mater Med 2018; 29:54. [PMID: 29725867 PMCID: PMC6190679 DOI: 10.1007/s10856-018-6077-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 04/21/2018] [Indexed: 05/24/2023]
Abstract
In this study, 3D macroporous bioscaffolds were developed from poly(dimethylsiloxane) (PDMS) which is inert, biocompatible, non-biodegradable, retrievable and easily manufactured at low cost. PDMS bioscaffolds were synthesized using a solvent casting and particulate leaching (SCPL) technique and exhibited a macroporous interconnected architecture with 86 ± 3% porosity and 300 ± 100 µm pore size. As PDMS intrinsically has a hydrophobic surface, mainly due to the existence of methyl groups, its surface was modified by oxygen plasma treatment which, in turn, enabled us to apply a novel polydopamine coating onto the surface of the bioscaffold. The addition of a polydopamine coating to bioscaffolds was confirmed using composition analysis. Characterization of oxygen plasma treated-PDMS bioscaffolds coated with polydopamine (polydopamine coated-PDMS bioscaffolds) showed the presence of hydroxyl and secondary amines on their surface which resulted in a significant decrease in water contact angle when compared to uncoated-PDMS bioscaffolds (35 ± 3%, P < 0.05). Seeding adipose tissue-derived mesenchymal stem cells (AD-MSCs) into polydopamine coated-PDMS bioscaffolds resulted in cells demonstrating a 70 ± 6% increase in viability and 40 ± 5% increase in proliferation when compared to AD-MSCs seeded into uncoated-PDMS bioscaffolds (P < 0.05). In summary, this two-step method of oxygen plasma treatment followed by polydopamine coating improves the biocompatibility of PDMS bioscaffolds and only requires the use of simple reagents and mild reaction conditions. Hence, our novel polydopamine coated-PDMS bioscaffolds can represent an efficient and low-cost bioscaffold platform to support MSC therapies.
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Affiliation(s)
- Mehdi Razavi
- Department of Radiology, Stanford University, Palo Alto, CA, 94304, USA
| | - Avnesh S Thakor
- Department of Radiology, Stanford University, Palo Alto, CA, 94304, USA.
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238
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Bafoil M, Jemmat A, Martinez Y, Merbahi N, Eichwald O, Dunand C, Yousfi M. Effects of low temperature plasmas and plasma activated waters on Arabidopsis thaliana germination and growth. PLoS One 2018; 13:e0195512. [PMID: 29630641 PMCID: PMC5891017 DOI: 10.1371/journal.pone.0195512] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 03/23/2018] [Indexed: 11/18/2022] Open
Abstract
Two plasma devices at atmospheric pressure (air dielectric barrier discharge and helium plasma jet) have been used to study the early germination of Arabidopsis thaliana seeds during the first days. Then, plasma activated waters are used during the later stage of plant development and growth until 42 days. The effects on both testa and endospserm ruptures during the germination stage are significant in the case of air plasma due to its higher energy and efficiency of producing reactive oxygen species than the case of helium plasma. The latter has shown distinct effects only for testa rupture. Analysis of germination stimulations are based on specific stainings for reactive oxygen species production, peroxidase activity and also membrane permeability tests. Furthermore, scanning electron microscopy (SEM) has shown a smoother seed surface for air plasma treated seeds that can explain the plasma induced-germination. During the growth stage, plants were watered using 4 kinds of water (tap and deionized waters activated or not by the low temperature plasma jet). With regards to other water kinds, the characterization of the tap water has shown a larger conductivity, acidity and concentration of reactive nitrogen and oxygen species. Only the tap water activated by the plasma jet has shown a significant effect on the plant growth. This effect could be correlated to reactive nitrogen species such as nitrite/nitrate species present in plasma activated tap water.
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Affiliation(s)
- Maxime Bafoil
- LAPLACE, UMR CNRS 5213, Université Paul Sabatier, Toulouse, France
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Auzeville, Castanet Tolosan, France
| | - Achraf Jemmat
- LAPLACE, UMR CNRS 5213, Université Paul Sabatier, Toulouse, France
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Auzeville, Castanet Tolosan, France
| | - Yves Martinez
- Fédération de Recherche 3450, Plateforme Imagerie, Pôle de Biotechnologie Végétale, Castanet-Tolosan, France
| | - Nofel Merbahi
- LAPLACE, UMR CNRS 5213, Université Paul Sabatier, Toulouse, France
| | - Olivier Eichwald
- LAPLACE, UMR CNRS 5213, Université Paul Sabatier, Toulouse, France
| | - Christophe Dunand
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, Auzeville, Castanet Tolosan, France
- * E-mail: (MY); (CD)
| | - Mohammed Yousfi
- LAPLACE, UMR CNRS 5213, Université Paul Sabatier, Toulouse, France
- * E-mail: (MY); (CD)
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239
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Chatraie M, Torkaman G, Khani M, Salehi H, Shokri B. In vivo study of non-invasive effects of non-thermal plasma in pressure ulcer treatment. Sci Rep 2018; 8:5621. [PMID: 29618775 PMCID: PMC5884810 DOI: 10.1038/s41598-018-24049-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 03/26/2018] [Indexed: 12/18/2022] Open
Abstract
According to high incidence and prevalence of pressure ulcers worldwide, the purpose of this study is using of non-thermal atmospheric plasma as a novel therapy for pressure ulcers. Cold plasma was produced by applying a high-voltage (5 kV) and high-frequency (25 kHz), to helium gas. Under general anesthesia and sterile conditions, two circular magnets were used to create pressure ulcers on the dorsal skin of adult rats. The wounds were divided randomly into control and plasma-treated groups. Animals in the plasma-treated group received plasma radiation for 5 days, each day 3 times and every time 60 s. Mechanical assays were performed to determine plasma effects on the mechanical strength of the repaired tissue. The results showed that mechanical strength of repaired wound in the plasma-treated group was significantly higher than that in the control group (p < 0.05). In addition, evidence from histological studies indicates a significantly accelerated wound re-epithelialization in comparison with the control group; angiogenesis and fibrosis (collagen synthesis) were also significantly increased and the inflammation phase of wound healing was shorter in the plasma-treated group. The plasma treatment also resulted in significant wound contraction and acceleration of wound healing. The findings of present study indicate the effects of cold plasma on pressure ulcer treatment.
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Affiliation(s)
- Maedeh Chatraie
- Laser applications in medical sciences research center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Laser - Plasma Research Institute, Shahid Beheshti University, G.C., P.O. Box, 19839-6941, Tehran, Iran
| | - Giti Torkaman
- Physical Therapy Department, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mohammadreza Khani
- Laser - Plasma Research Institute, Shahid Beheshti University, G.C., P.O. Box, 19839-6941, Tehran, Iran
| | - Hossein Salehi
- Department of Anatomical Sciences, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Babak Shokri
- Laser - Plasma Research Institute, Shahid Beheshti University, G.C., P.O. Box, 19839-6941, Tehran, Iran.
- Physics Department of Shahid Beheshti University, G.C., P.O. Box, 19839-6941, Tehran, Iran.
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240
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Ballout H, Hertel M, Doehring J, Kostka E, Hartwig S, Paris S, Preissner S. Effects of plasma jet, dielectric barrier discharge, photodynamic therapy and sodium hypochlorite on infected curved root canals. J Biophotonics 2018; 11:e201700186. [PMID: 29024574 DOI: 10.1002/jbio.201700186] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/10/2017] [Indexed: 06/07/2023]
Abstract
The aim of this investigation was to evaluate the effects of 2 different cold atmospheric plasma (CAP) sources, photodynamic therapy and sodium hypochlorite (NaOCl), on infected root canals. Therefore, 50 standardized curved human root canals were infected with Enterococcus faecalis and assigned to 5 groups-negative control (NC), plasma jet (CAP I), dielectric barrier discharge (CAP II), photodynamic therapy (PDT) and NaOCl + passive ultrasonic irrigation-for 30 s. Colony forming units (CFUs) were determined. NaOCl was significantly more effective at reducing CFUs than all test groups (P < .0001 [Mann-Whitney U test]) in both parts of the root canal. CFUs in PDT were significantly lower than those in CAP II (P = .015), and those in CAP I were lower than those in CAP II (P = .05). Among all other groups and in the apical parts, no significant differences were found (P > .05).
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Affiliation(s)
- Husam Ballout
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Moritz Hertel
- Department of Oral Medicine, Dental Radiology and Oral Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jonas Doehring
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Eckehard Kostka
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Stefan Hartwig
- Department for Oral and Maxillofacial and Facial Plastic Surgery, Johannes Wesling Hospital Minden, University Hospital of the Ruhr University Bochum, Bochum, Germany
| | - Sebastian Paris
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Saskia Preissner
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Berlin, Germany
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Canal C, Fontelo R, Hamouda I, Guillem-Marti J, Cvelbar U, Ginebra MP. Plasma-induced selectivity in bone cancer cells death. Free Radic Biol Med 2017; 110:72-80. [PMID: 28571751 DOI: 10.1016/j.freeradbiomed.2017.05.023] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 05/23/2017] [Accepted: 05/27/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Current therapies for bone cancers - either primary or metastatic - are difficult to implement and unfortunately not completely effective. An alternative therapy could be found in cold plasmas generated at atmospheric pressure which have already demonstrated selective anti-tumor action in a number of carcinomas and in more relatively rare brain tumors. However, its effects on bone cancer are still unknown. METHODS Herein, we employed an atmospheric pressure plasma jet (APPJ) to validate its selectivity towards osteosarcoma cell line vs. osteoblasts & human mesenchymal stem cells. RESULTS Cytotoxicity following direct interaction of APPJ with cells is comparable to indirect interaction when only liquid medium is treated and subsequently added to the cells, especially on the long-term (72h of cell culture). Moreover, following contact of the APPJ treated medium with cells, delayed effects are observed which lead to 100% bone cancer cell death through apoptosis (decreased cell viability with incubation time in contact with APPJ treated medium from 24h to 72h), while healthy cells remain fully viable and unaffected by the treatment. CONCLUSIONS The high efficiency of the indirect treatment indicates that an important role is played by the reactive oxygen species (ROS) and reactive nitrogen species (RNS) in the gaseous plasma stage and then transmitted to the liquid phase, which overall lead to lethal and selective action towards osteosarcoma cells. These findings open new pathways for treatment of metastatic bone disease with a minimally invasive approach.
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Affiliation(s)
- Cristina Canal
- Biomaterials, Biomechanics and Tissue Engineering Group, Dpt. Materials Science and Metallurgy, Technical University of Catalonia (UPC), c. Eduard Maristany 10-14, 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Barcelona, Spain.
| | - Raul Fontelo
- Biomaterials, Biomechanics and Tissue Engineering Group, Dpt. Materials Science and Metallurgy, Technical University of Catalonia (UPC), c. Eduard Maristany 10-14, 08019 Barcelona, Spain
| | - Ines Hamouda
- Biomaterials, Biomechanics and Tissue Engineering Group, Dpt. Materials Science and Metallurgy, Technical University of Catalonia (UPC), c. Eduard Maristany 10-14, 08019 Barcelona, Spain
| | - Jordi Guillem-Marti
- Biomaterials, Biomechanics and Tissue Engineering Group, Dpt. Materials Science and Metallurgy, Technical University of Catalonia (UPC), c. Eduard Maristany 10-14, 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Barcelona, Spain
| | - Uros Cvelbar
- Department of Surface Engineering and Optoelectronics (F-4), Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Maria-Pau Ginebra
- Biomaterials, Biomechanics and Tissue Engineering Group, Dpt. Materials Science and Metallurgy, Technical University of Catalonia (UPC), c. Eduard Maristany 10-14, 08019 Barcelona, Spain; Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Barcelona, Spain; Institute for Bioengineering of Catalonia, c/ Baldiri i Reixach 10-12, 08028 Barcelona, Spain
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242
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Lee S, Lee H, Jeong D, Ham J, Park S, Choi EH, Kim SJ. Cold atmospheric plasma restores tamoxifen sensitivity in resistant MCF-7 breast cancer cell. Free Radic Biol Med 2017; 110:280-290. [PMID: 28666851 DOI: 10.1016/j.freeradbiomed.2017.06.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 06/09/2017] [Accepted: 06/26/2017] [Indexed: 12/23/2022]
Abstract
Cancer recurrence, which is frequently accompanied by chemotherapy, has been a challenge in cancer treatment. This study was carried out to examine the potential applications of the reactive oxygen species (ROS)-producing cold atmospheric plasma (CAP) to overcome the cancer cells' drug resistance, which has been emerging as an alternative therapeutic tool for cancer. For this, we developed a tamoxifen (Tam)-resistant MCF-7 (MCF-7/TamR) breast cancer cell model and examined the effect of CAP on the recovery of Tam sensitivity at the cellular and molecular level. The ROS level was increased 1.9-fold in CAP-treated MCF-7/TamR cells compared to the non-treated cell. CAP was proven to restore sensitivity by up to 50% for MCF-7/TamR cells against Tam after CAP treatment. The comparison of genome-wide expression between the acquisition of Tam resistance and CAP treatment identified 20 genes that commonly showed significant expression changes. Notably, all the genes except two have been oppositely dysregulated in the two cellular statuses, and the majority of them are known to contribute to the acquisition of Tam resistance. The protein expression of selected genes, MX1 and HOXC6, was recovered to that of their parental cell by CAP. Furthermore, the dysregulation of MX1 and HOXC6 in MCF-7/TamR alleviated the drug sensitivity recovery effect of CAP. Taken together, CAP inhibited the growth of Tam-resistant MCF-7 cancer cells and reset it to the Tam-sensitive status by restoring the expression of drug resistance-related genes. These findings may lend credence to CAP as an alternative or complementary tool in the treatment or prevention of Tam-resistant cancer.
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Affiliation(s)
- Seungyeon Lee
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea
| | - Hyunkyung Lee
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea
| | - Dawoon Jeong
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea
| | - Juyeon Ham
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea
| | - Sungbin Park
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea
| | - Eun Ha Choi
- Plasma Bioscience Research Center, Kwangwoon University, Seoul, Republic of Korea
| | - Sun Jung Kim
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea.
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243
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Pankaj SK, Wan Z, Colonna W, Keener KM. Effect of high voltage atmospheric cold plasma on white grape juice quality. J Sci Food Agric 2017; 97:4016-4021. [PMID: 28195339 DOI: 10.1002/jsfa.8268] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 02/03/2017] [Accepted: 02/06/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND This study focuses on the effects of novel, non-thermal high voltage atmospheric cold plasma (HVACP) processing on the quality of grape juice. A quality-based comparison of cold plasma treatment with thermal pasteurization treatment of white grape juice was done. RESULTS HVACP treatment of grape juice at 80 kV for 4 min resulted in a 7.4 log10 CFU mL-1 reduction in Saccharomyces cerevisiae without any significant (P > 0.05) change in pH, acidity and electrical conductivity of the juice. An increase in non-enzymatic browning was observed, but total color difference was very low and within acceptable limits. Spectrophotometric measurements showed a decrease in total phenolics, total flavonoids, DPPH free radical scavenging and antioxidant capacity, but they were found to be comparable to those resulting from thermal pasteurization. An increase in total flavonols was observed after HVACP treatments. CONCLUSION HVACP treatment of white grape juice at 80 kV for 2 min was found to be comparable to thermal pasteurization in all analyzed quality attributes. HVACP has shown the potential to be used as an alternative to thermal treatment of white grape juice. © 2017 Society of Chemical Industry.
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Affiliation(s)
| | - Zifan Wan
- Center for Crop Utilization Research, Iowa State University, Ames, IA, USA
| | - William Colonna
- Center for Crop Utilization Research, Iowa State University, Ames, IA, USA
| | - Kevin M Keener
- Center for Crop Utilization Research, Iowa State University, Ames, IA, USA
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244
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Min SC, Roh SH, Niemira BA, Boyd G, Sites JE, Uknalis J, Fan X. In-package inhibition of E. coli O157:H7 on bulk Romaine lettuce using cold plasma. Food Microbiol 2017; 65:1-6. [PMID: 28399991 DOI: 10.1016/j.fm.2017.01.010] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/24/2017] [Accepted: 01/24/2017] [Indexed: 11/28/2022]
Abstract
Dielectric barrier discharge atmospheric cold plasma (DACP) treatment was evaluated for the inactivation of Escherichia coli O157:H7, surface morphology, color, carbon dioxide generation, and weight loss of bulk Romaine lettuce in a commercial plastic clamshell container. The lettuce samples were packed in a model bulk packaging configuration (three rows with either 1, 3, 5, or 7 layers) in the container and treated by DACP (42.6 kV, 10 min). DACP treatment reduced the number of E. coli O157:H7 in the leaf samples in the 1-, 3-, and 5-layer configurations by 0.4-0.8 log CFU/g lettuce, with no significant correlation to the sample location (P > 0.05). In the largest bulk stacking with 7 layers, a greater degree of reduction (1.1 log CFU/g lettuce) was observed at the top layer, but shaking the container increased the uniformity of the inhibition. DACP did not significantly change the surface morphology, color, respiration rate, or weight loss of the samples, nor did these properties differ significantly according to their location in the bulk stack. DACP treatment inhibited E. coli O157:H7 on bulk lettuce in clamshell containers in a uniform manner, without affecting the physical and biological properties and thus holds promise as a post-packaging process for fresh and fresh-cut fruits and vegetables.
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Affiliation(s)
- Sea C Min
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Si Hyeon Roh
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Brendan A Niemira
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA.
| | - Glenn Boyd
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Joseph E Sites
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Joseph Uknalis
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Xuetong Fan
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
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245
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Wang XQ, Zhou RW, Groot GD, Bazaka K, Murphy AB, Ostrikov KK. Spectral characteristics of cotton seeds treated by a dielectric barrier discharge plasma. Sci Rep 2017; 7:5601. [PMID: 28717249 PMCID: PMC5514119 DOI: 10.1038/s41598-017-04963-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 05/22/2017] [Indexed: 11/24/2022] Open
Abstract
Cold atmospheric plasma has recently emerged as a simple, low-cost and efficient physical method for inducing significant biological responses in seeds and plants without the use of traditional, potentially environmentally-hazardous chemicals, fungicides or hormones. While the beneficial effects of plasma treatment on seed germination, disease resistance and agricultural output have been reported, the mechanisms that underpin the observed biological responses are yet to be fully described. This study employs Fourier Transform Infrared (FTIR) spectroscopy and emission spectroscopy to capture chemical interactions between plasmas and seed surfaces with the aim to provide a more comprehensive account of plasma-seed interactions. FTIR spectroscopy of the seed surface confirms plasma-induced chemical etching of the surface. The etching facilitates permeation of water into the seed, which is confirmed by water uptake measurements. FTIR of exhaust and emission spectra of discharges show oxygen-containing species known for their ability to stimulate biochemical processes and deactivate pathogenic microorganisms. In addition, water gas, CO2, CO and molecules containing -C(CH3)3- moieties observed in FTIR spectra of the exhaust gas during plasma treatment may be partly responsible for the plasma chemical etching of seed surface through oxidizing the organic components of the seed coat.
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Affiliation(s)
- Xing-Quan Wang
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, PO Box 218, Lindfield, NSW 2070, Australia
- School of Physics and Electronic Information, Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou, 341000, China
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Ren-Wu Zhou
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Gerard de Groot
- CSIRO Manufacturing, PO Box 218, Lindfield, NSW 2070, Australia
| | - Kateryna Bazaka
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, PO Box 218, Lindfield, NSW 2070, Australia.
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | | | - Kostya Ken Ostrikov
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, PO Box 218, Lindfield, NSW 2070, Australia
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
- CSIRO Manufacturing, PO Box 218, Lindfield, NSW 2070, Australia
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia
- Institute for Future Environments, Queensland University of Technology, Brisbane, QLD 4000, Australia
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246
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Shi L, Ito F, Wang Y, Okazaki Y, Tanaka H, Mizuno M, Hori M, Hirayama T, Nagasawa H, Richardson DR, Toyokuni S. Non-thermal plasma induces a stress response in mesothelioma cells resulting in increased endocytosis, lysosome biogenesis and autophagy. Free Radic Biol Med 2017; 108:904-917. [PMID: 28465262 DOI: 10.1016/j.freeradbiomed.2017.04.368] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 04/19/2017] [Accepted: 04/28/2017] [Indexed: 12/31/2022]
Abstract
Non-thermal plasma (NTP) is a potential new therapeutic modality for cancer. However, its mechanism of action remains unclear. Herein, we studied the effect of NTP on mesothelioma cells and fibroblasts to understand its anti-proliferative efficacy. Interestingly, NTP demonstrated greater selective anti-proliferative activity against mesothelioma cells relative to fibroblasts than cisplatin, which is used for mesothelioma treatment. The anti-proliferative effect of NTP was enhanced by pre-incubation with the cellular iron donor, ferric ammonium citrate (FAC), and inhibited by iron chelation using desferrioxamine (DFO). Three oxidative stress probes (CM-H2DCFDA, MitoSOX and C11-BODIPY) demonstrated reactive oxygen species (ROS) generation by NTP, which was inhibited by DFO. Moreover, NTP decreased transferrin receptor-1 and increased ferritin-H and -L chain expression that was correlated with decreased iron-regulatory protein expression and RNA-binding activity. This regulation was potentially due to increased intracellular iron in lysosomes, which was demonstrated via the Fe(II)-selective probe, HMRhoNox-M, and was consistent with autophagic-induction. Immunofluorescence using LysoTracker and Pepstatin A probes demonstrated increased cellular lysosome content, which was confirmed by elevated LAMP1 expression. The enhanced lysosomal biogenesis after NTP could be due to the observed increase in fluid-phase endocytosis and early endosome formation. These results suggest NTP acts as a stressor, which results in increased endocytosis, lysosome content and autophagy. In fact, NTP rapidly increased autophagosome formation, as judged by increased LC3B-II expression, which co-localized with LAMP1, indicating autophagolysosome formation. Autophagic-induction by NTP was confirmed using electron microscopy. In summary, NTP acts as a cellular stressor to rapidly induce fluid-phase endocytosis, lysosome biogenesis and autophagy.
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Affiliation(s)
- Lei Shi
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Fumiya Ito
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Yue Wang
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Yasumasa Okazaki
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Hiromasa Tanaka
- Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya 466-8550, Japan
| | - Masaaki Mizuno
- Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya 466-8550, Japan
| | - Masaru Hori
- Plasma Nanotechnology Research Center, Nagoya University, Nagoya 464-8603, Japan
| | - Tasuku Hirayama
- The Laboratory of Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu, Japan
| | - Hideko Nagasawa
- The Laboratory of Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu, Japan
| | - Des R Richardson
- Molecular Pharmacology and Pathology Program, Department of Pathology and Bosch Institute, The University of Sydney, Sydney, NSW 2006, Australia.
| | - Shinya Toyokuni
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan; Molecular Pharmacology and Pathology Program, Department of Pathology and Bosch Institute, The University of Sydney, Sydney, NSW 2006, Australia.
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247
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Lee CM, Yang SW, Jung SC, Kim BH. Oxygen Plasma Treatment on 3D-Printed Chitosan/Gelatin/Hydroxyapatite Scaffolds for Bone Tissue Engineering. J Nanosci Nanotechnol 2017; 17:2747-2750. [PMID: 29664596 DOI: 10.1166/jnn.2017.13337] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The 3D hydroxyapatite/gelatin/chitosan composite scaffolds were fabricated by 3D printing technique. The scaffolds were treated by oxygen plasma to improve the bioactivity and its surface characterization and in vitro cell culture were investigated. The scaffolds exhibited the good porosity and interconnectivity of pores. After oxygen plasma etching, roughness and wettability on the scaffolds surface are increased. Plasma treated scaffolds showed higher proliferation than that of untreated scaffolds. Oxygen plasma treatment could be used as potential tool to enhance the biocompatibility on the 3D composite scaffolds.
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248
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Dezest M, Bulteau AL, Quinton D, Chavatte L, Le Bechec M, Cambus JP, Arbault S, Nègre-Salvayre A, Clément F, Cousty S. Oxidative modification and electrochemical inactivation of Escherichia coli upon cold atmospheric pressure plasma exposure. PLoS One 2017; 12:e0173618. [PMID: 28358809 PMCID: PMC5373509 DOI: 10.1371/journal.pone.0173618] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Accepted: 02/23/2017] [Indexed: 11/19/2022] Open
Abstract
Cold atmospheric pressure plasmas (CAPPs) are known to have bactericidal effects but the mechanism of their interaction with microorganisms remains poorly understood. In this study the bacteria Escherichia coli were used as a model and were exposed to CAPPs. Different gas compositions, helium with or without adjunctions of nitrogen or oxygen, were used. Our results indicated that CAPP induced bacterial death at decontamination levels depend on the duration, post-treatment storage and the gas mixture composition used for the treatment. The plasma containing O2 in the feeding gas was the most aggressive and showed faster bactericidal effects. Structural modifications of treated bacteria were observed, especially significant was membrane leakage and morphological changes. Oxidative stress caused by plasma treatment led to significant damage of E. coli. Biochemical analyses of bacterial macromolecules indicated massive intracellular protein oxidation. However, reactive oxygen and nitrogen species (RONS) are not the only actors involved in E. coli's death, electrical field and charged particles could play a significant role especially for He-O2 CAPP.
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Affiliation(s)
- Marlène Dezest
- UMR 5254, IPREM, Université de Pau et des pays de l’Adour, Pau, France
| | - Anne-Laure Bulteau
- UMR 5254, IPREM, Université de Pau et des pays de l’Adour, Pau, France
- * E-mail:
| | - Damien Quinton
- NSysA group, ENSCBP, CNRS UMR 5255, ISM, Université de Bordeaux, Pessac, France
| | - Laurent Chavatte
- UMR 5254, IPREM, Université de Pau et des pays de l’Adour, Pau, France
| | - Mickael Le Bechec
- UMR 5254, IPREM, Université de Pau et des pays de l’Adour, Pau, France
| | | | - Stéphane Arbault
- NSysA group, ENSCBP, CNRS UMR 5255, ISM, Université de Bordeaux, Pessac, France
| | | | - Franck Clément
- UMR 5254, IPREM, Université de Pau et des pays de l’Adour, Pau, France
| | - Sarah Cousty
- Faculté de Chirurgie Dentaire de Toulouse, centre Hospitalier Universitaire de Toulouse, Université Paul Sabatier, Toulouse, France
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249
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Kang SU, Seo SJ, Kim YS, Shin YS, Koh YW, Lee CM, Yang SS, Lee JS, Moon E, Kang H, Ryeo JB, Lee Y, Kim CH. Comparative Effects of Non-Thermal Atmospheric Pressure Plasma on Migration and Invasion in Oral Squamous Cell Cancer, by Gas Type. Yonsei Med J 2017; 58:272-281. [PMID: 28120556 PMCID: PMC5290005 DOI: 10.3349/ymj.2017.58.2.272] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 11/03/2016] [Accepted: 11/10/2016] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The fourth state of matter, plasma is known as an ionized gas with electrons, radicals and ions. The use of non-thermal plasma (NTP) in cancer research became possible because of the progresses in plasma medicine. Previous studies on the potential NTP-mediated cancer therapy have mainly concentrated on cancer cell apoptosis. In the present study, we compared the inhibitory effect of NTP on cell migration and invasion in the oral squamous cancer cell lines. MATERIALS AND METHODS We used oral squamous cancer cell lines (SCC1483, MSKQLL1) and different gases (N₂, He, and Ar). To investigate the mechanism of plasma treatment, using different gases (N₂, He, and Ar) which induces anti-migration and anti-invasion properties, we performed wound healing assay, invasion assay and gelatin zymography. RESULTS The results showed that NTP inhibits cancer cell migration and invasion of oral squamous cancer cell. In addition, focal adhesion kinase expression and matrix metalloproteinase-2/9 activity were also inhibited. CONCLUSION The suppression of cancer cell invasion by NTP varied depending on the type of gas. Comparison of the three gases revealed that N₂ NTP inhibited cell migration and invasion most potently via decreased expression of focal adhesion kinase and matrix metalloproteinase activity.
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Affiliation(s)
- Sung Un Kang
- Department of Otolaryngology, Ajou University School of Medicine, Suwon, Korea
| | - Seong Jin Seo
- Department of Otolaryngology, Ajou University School of Medicine, Suwon, Korea
| | - Yeon Soo Kim
- Department of Otorhinolaryngology, Konyang University College of Medicine, Daejeon, Korea
| | - Yoo Seob Shin
- Department of Otolaryngology, Ajou University School of Medicine, Suwon, Korea
| | - Yoon Woo Koh
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - Chang Min Lee
- Department of Electrical and Computer Engineering, Ajou University, Suwon, Korea
| | - Sang Sik Yang
- Department of Electrical and Computer Engineering, Ajou University, Suwon, Korea
| | - Jong Soo Lee
- Department of Life Science, Ajou University, Suwon, Korea
| | - Eunpyo Moon
- Department of Life Science, Ajou University, Suwon, Korea
| | | | | | | | - Chul Ho Kim
- Department of Otolaryngology, Ajou University School of Medicine, Suwon, Korea.
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250
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Han D, Cho JH, Lee RH, Bang W, Park K, Kim MS, Shim JH, Chae JI, Moon SY. Antitumorigenic effect of atmospheric-pressure dielectric barrier discharge on human colorectal cancer cells via regulation of Sp1 transcription factor. Sci Rep 2017; 7:43081. [PMID: 28225083 PMCID: PMC5320527 DOI: 10.1038/srep43081] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 01/19/2017] [Indexed: 02/03/2023] Open
Abstract
Human colorectal cancer cell lines (HT29 and HCT116) were exposed to dielectric barrier discharge (DBD) plasma at atmospheric pressure to investigate the anticancer capacity of the plasma. The dose- and time-dependent effects of DBDP on cell viability, regulation of transcription factor Sp1, cell-cycle analysis, and colony formation were investigated by means of MTS assay, DAPI staining, propidium iodide staining, annexin V-FITC staining, Western blot analysis, RT-PCR analysis, fluorescence microscopy, and anchorage-independent cell transformation assay. By increasing the duration of plasma dose times, significant reductions in the levels of both Sp1 protein and Sp1 mRNA were observed in both cell lines. Also, expression of negative regulators related to the cell cycle (such as p53, p21, and p27) was increased and of the positive regulator cyclin D1 was decreased, indicating that the plasma treatment led to apoptosis and cell-cycle arrest. In addition, the sizes and quantities of colony formation were significantly suppressed even though two cancer promoters, such as TPA and epidermal growth factor, accompanied the plasma treatment. Thus, plasma treatment inhibited cell viability and colony formation by suppressing Sp1, which induced apoptosis and cell-cycle arrest in these two human colorectal cancer cell lines.
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Affiliation(s)
- Duksun Han
- Department of Applied Plasma Engineering, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
| | - Jin Hyoung Cho
- Department of Dental Pharmacology, School of Dentistry and Institute of Oral Bioscience, BK 21 Plus, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
| | - Ra Ham Lee
- Department of Dental Pharmacology, School of Dentistry and Institute of Oral Bioscience, BK 21 Plus, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
| | - Woong Bang
- Department of Dental Pharmacology, School of Dentistry and Institute of Oral Bioscience, BK 21 Plus, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
| | - Kyungho Park
- Department of Dental Pharmacology, School of Dentistry and Institute of Oral Bioscience, BK 21 Plus, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
| | - Minseok S. Kim
- Department of New Biology, DGIST, Daegu 42988, Republic of Korea
| | - Jung-Hyun Shim
- Department of Pharmacy, College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, 1666 Yeongsan-ro, Muan-gun, Jeonnam, Republic of Korea
| | - Jung-Il Chae
- Department of Dental Pharmacology, School of Dentistry and Institute of Oral Bioscience, BK 21 Plus, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
| | - Se Youn Moon
- Department of Applied Plasma Engineering, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
- Department of Quantum System Engineering, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabuk-do, Republic of Korea
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