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Irmak SE, Ozdemir GD, Ozdemir MA, Ercan UK. Machine learning-aided evaluation of oxidative strength of cold atmospheric plasma-treated water. Biomed Phys Eng Express 2024; 10:045016. [PMID: 38697029 DOI: 10.1088/2057-1976/ad464f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 05/02/2024] [Indexed: 05/04/2024]
Abstract
Plasma medicine is gaining attraction in the medical field, particularly the use of cold atmospheric plasma (CAP) in biomedicine. The chemistry of the plasma is complex, and the reactive oxygen species (ROS) within it are the basis for the biological effect of CAP on the target. Understanding how the oxidative power of ROS responds to diverse plasma parameters is vital for standardizing the effective application of CAP. The proven applicability of machine learning (ML) in the field of medicine is encouraging, as it can also be applied in the field of plasma medicine to correlate the oxidative strength of plasma-treated water (PTW) according to different parameters. In this study, plasma-treated water was mixed with potassium iodide-starch reagent for color formation that could be linked to the oxidative capacity of PTW. Corresponding images were captured resulting from the exposure of the color-forming agent to water treated with plasma for different time points. Several ML models were trained to distinguish the color changes sourced by the oxidative strength of ROS. The AdaBoost Classifier (ABC) algorithm demonstrated better performance among the classification models used by extracting color-based features from the images. Our results, with a test accuracy of 63.5%, might carry a potential for future standardization in the field of plasma medicine with an automated system that can be created to interpret the oxidative properties of ROS in different plasma treatment parameters via ML.
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Affiliation(s)
- Seyma Ecem Irmak
- Department of Biomedical Engineering, Graduate School of Natural and Applied Sciences, Izmir Katip Celebi University, 35620 Cigli, Izmir, Turkey
| | - Gizem Dilara Ozdemir
- Department of Biomedical Engineering, Graduate School of Natural and Applied Sciences, Izmir Katip Celebi University, 35620 Cigli, Izmir, Turkey
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Izmir Katip Celebi University, 35620 Cigli, Izmir, Turkey
| | - Mehmet Akif Ozdemir
- Department of Biomedical Engineering, Graduate School of Natural and Applied Sciences, Izmir Katip Celebi University, 35620 Cigli, Izmir, Turkey
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Izmir Katip Celebi University, 35620 Cigli, Izmir, Turkey
| | - Utku Kürşat Ercan
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Izmir Katip Celebi University, 35620 Cigli, Izmir, Turkey
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Fallon M, Kennedy S, Daniels S, Humphreys H. Plasma-activated liquid as a potential decontaminant in healthcare: assessment of antibacterial activity and use with cleaning cloths. J Hosp Infect 2024; 145:218-223. [PMID: 38272125 DOI: 10.1016/j.jhin.2024.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/21/2023] [Accepted: 01/08/2024] [Indexed: 01/27/2024]
Abstract
BACKGROUND Cold air plasma (CAP) can generate plasma-activated liquids (PALs) with high concentrations of reactive oxygen (ROS) and nitrogen species (RNS), e.g., nitrites, with antimicrobial properties. AIM We investigated the concentrations of ROS and RNS in saline PAL. We assessed planktonic bacterial inactivation by PAL and the decontamination of contaminated cleaning cloths. METHODS Phosphate-buffered saline (PBS) was treated with an air-driven CAP jet for 90 or 300 s to generate PAL. The ROS and RNS were measured using quantitative fluorescent (2,7-dichlorofluorescin diacetate) and colourimetric (Greiss) assays. Isolates of MRSA and Escherichia coli were incubated in PAL overnight and inactivation measured through colony forming unit (cfu) assays. Sections of cleaning cloths were incubated with MRSA and E. coli, and treated with PAL for 1 h. Bacterial inactivation was measured through resazurin reduction assays. RESULTS Nitrites increased from 0.1 μM in untreated PBS to 49.1 μM and to 94.0 μM in 90- and 300-s CAP-treated PAL, respectively. ROS increased from 30 μM in untreated PBS to 75 μM and to 103 μM in 90- and 300-s CAP-treated PAL, respectively. 90-s PAL reduced MRSA and E. coli viability (P<0.05) and 300-s PAL resulted in more than a 7-log reduction of both. One-hour treatment of contaminated cleaning cloths in PAL resulted in a 55% and 73% reduction in viable MRSA and E. coli, respectively (P<0.05). CONCLUSION Inactivation of planktonic bacteria correlated with ROS and RNS concentrations. PAL reduced bacteria contaminated cleaning cloths. PAL has potential as a hospital disinfectant, including cleaning cloths.
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Affiliation(s)
- M Fallon
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin, Ireland
| | - S Kennedy
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin, Ireland
| | - S Daniels
- National Centre for Plasma Science and Technology, Dublin City University, Dublin, Ireland
| | - H Humphreys
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Dublin, Ireland.
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Herianto S, Arcega RD, Hou CY, Chao HR, Lee CC, Lin CM, Mahmudiono T, Chen HL. Chemical decontamination of foods using non-thermal plasma-activated water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 874:162235. [PMID: 36791866 DOI: 10.1016/j.scitotenv.2023.162235] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
The presence of chemical contaminants in foods and agricultural products is one of the major safety issues worldwide, posing a serious concern to human health. Nonthermal plasma (NTP) containing richly reactive oxygen and nitrogen species (RONS) has been trialed as a potential decontamination method. Yet, this technology comes with multiple downsides, including adverse effects on the quality of treated foods and limited exposure to entire surfaces on samples with hard-to-reach spots, further hindering real-life applications. Therefore, plasma-activated water (PAW) has been recently developed to facilitate the interactions between RONS and contaminant molecules in the liquid phase, allowing a whole surface treatment with efficient chemical degradation. Here, we review the recent advances in PAW utilized as a chemical decontamination agent in foods. The reaction mechanisms and the main RONS contributors involved in the PAW-assisted removal of chemical contaminants are briefly outlined. Also, the comprehensive effects of these treatments on food qualities (chemical and physical characteristics) and toxicological evaluation of PAW (in vitro and in vivo) are thoroughly discussed. Ultimately, we identified some current challenges and provided relevant suggestions, which can further promote PAW research for real-life applications in the future.
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Affiliation(s)
- Samuel Herianto
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program (TIGP), Academia Sinica, Taipei 11529, Taiwan; Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan; Department of Chemistry (Chemical Biology Division), College of Science, National Taiwan University, Taipei 10617, Taiwan
| | - Rachelle D Arcega
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chih-Yao Hou
- Department of Seafood Science, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
| | - How-Ran Chao
- Department of Environmental Science and Engineering, College of Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; Institute of Food Safety Management, College of Agriculture, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; Emerging Compounds Research Center, General Research Service Center, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Ching-Chang Lee
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Research Center of Environmental Trace Toxic Substances, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chia-Min Lin
- Department of Seafood Science, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
| | - Trias Mahmudiono
- Department of Nutrition, Faculty of Public Health, Universitas Airlangga, Surabaya 60115, Indonesia
| | - Hsiu-Ling Chen
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Research Center of Environmental Trace Toxic Substances, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Department of Nutrition, Faculty of Public Health, Universitas Airlangga, Surabaya 60115, Indonesia.
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Guo L, Zhao P, Jia Y, Li T, Huang L, Wang Z, Liu D, Hou Z, Zhao Y, Zhang L, Li H, Kong Y, Li J, Wang X, Rong M. Efficient inactivation of the contamination with pathogenic microorganisms by a combination of water spray and plasma-activated air. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130686. [PMID: 36610342 PMCID: PMC9796360 DOI: 10.1016/j.jhazmat.2022.130686] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/19/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
The global pandemic caused by SARS-CoV-2 has lasted two and a half years and the infections caused by the viral contamination are still occurring. Developing efficient disinfection technology is crucial for the current epidemic or infectious diseases caused by other pathogenic microorganisms. Gas plasma can efficiently inactivate different microorganisms, therefore, in this study, a combination of water spray and plasma-activated air was established for the disinfection of pathogenic microorganisms. The combined treatment efficiently inactivated the Omicron-pseudovirus through caused the nitration modification of the spike proteins and also the pathogenic bacteria. The combined treatment was improved with a funnel-shaped nozzle to form a temporary relatively sealed environment for the treatment of the contaminated area. The improved device could efficiently inactivate the Omicron-pseudovirus and bacteria on the surface of different materials including quartz, metal, leather, plastic, and cardboard and the particle size of the water spray did not affect the inactivation effects. This study supplied a disinfection strategy based on plasma-activated air for the inactivation of contaminated pathogenic microorganisms.
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Affiliation(s)
- Li Guo
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Pengyu Zhao
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yikang Jia
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Tianhui Li
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Lingling Huang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Zifeng Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Dingxin Liu
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China.
| | - Zhanwu Hou
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yizhen Zhao
- Department of Applied Physics, School of Physics, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Lei Zhang
- Department of Applied Physics, School of Physics, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Hua Li
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yu Kong
- School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Juntang Li
- Research Centre for Occupation and Environment Medicine, Collaborative Innovation Centre for Medical Equipment, Key Laboratory of Biological Damage Effect and Protection, Luoyang 471031, PR China.
| | - Xiaohua Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Mingzhe Rong
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
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Lee HR, Kang SU, Kim HJ, Ji EJ, Yun JH, Kim S, Jang JY, Shin YS, Kim CH. Liquid plasma as a treatment for cutaneous wound healing through regulation of redox metabolism. Cell Death Dis 2023; 14:119. [PMID: 36781835 PMCID: PMC9925775 DOI: 10.1038/s41419-023-05610-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 01/13/2023] [Accepted: 01/20/2023] [Indexed: 02/15/2023]
Abstract
The skin functions as the outermost protective barrier to the internal organs and major vessels; thus, delayed regeneration from acute injury could induce serious clinical complications. For rapid recovery of skin wounds, promoting re-epithelialization of the epidermis at the initial stage of injury is essential, wherein epithelial keratinocytes act as leading cells via migration. This study applied plasma technology, which has been known to enable wound healing in the medical field. Through in vitro and in vivo experiments, the study elucidated the effect and molecular mechanism of the liquid plasma (LP) manufactured by our microwave plasma system, which was found to improve the applicability of existing gas-type plasma on skin cell migration for re-epithelialization. LP treatment promoted the cytoskeletal transformation of keratinocytes and migration owing to changes in the expression of integrin-dependent focal adhesion molecules and matrix metalloproteinases (MMPs). This study also identified the role of increased levels of intracellular reactive oxygen species (ROS) as a driving force for cell migration activation, which was regulated by changes in NADPH oxidases and mitochondrial membrane potential. In an in vivo experiment using a murine dorsal full-thickness acute skin wound model, LP treatment helped improve the re-epithelialization rate, reaffirming the activation of the underlying intracellular ROS-dependent integrin-dependent signaling molecules. These findings indicate that LP could be a valuable wound management material that can improve the regeneration potential of the skin via the activation of migration-related molecular signaling within the epithelial cell itself with plasma-driven oxidative eustress.
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Affiliation(s)
- Hye Ran Lee
- Department of Otolaryngology-Head and Neck Surgery, Catholic Kwandong University International St. Mary's Hospital, Incheon, 22711, Republic of Korea
- Department of Medical Sciences, Otolaryngology, Graduate School of Ajou University, Suwon, 16499, Republic of Korea
| | - Sung Un Kang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Haeng Jun Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Eun Jong Ji
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Ju Hyun Yun
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Sungryeal Kim
- Department of Otolaryngology, College of Medicine, Inha University, Incheon, 22332, Republic of Korea
| | - Jeon Yeob Jang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Yoo Seob Shin
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Chul-Ho Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea.
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Wang J, Cheng JH, Sun DW. Enhancement of Wheat Seed Germination, Seedling Growth and Nutritional Properties of Wheat Plantlet Juice by Plasma Activated Water. JOURNAL OF PLANT GROWTH REGULATION 2023; 42:2006-2022. [PMID: 35668726 PMCID: PMC9152647 DOI: 10.1007/s00344-022-10677-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 05/04/2022] [Indexed: 05/04/2023]
Abstract
UNLABELLED Previous studies have shown the great potential of using plasma-activated water (PAW) on improving agriculture seed germination, however, information on the influence of PAW on crop plantlet juice remains scanty. In this research, the effect of PAW generated by atmosphere pressure Ar-O2 plasma jet for 1-5 min on wheat seed germination, seedling growth and nutritional properties of wheat plantlet juice was investigated. Results revealed that all PAWs could enhance wheat seed germination and seedling growth in 7 days by improving the germination rate, germination index, fresh weight, dry weight and vigour index, and especially that PAW activated for 3 min (PAW-3) showed the best overall performance. In addition, the application of PAWs enhanced the nutritional properties of wheat plantlet juice from those grown for 14 days by improving total soluble solids, protein content, photosynthetic pigments, total phenolic content, antioxidant activity, enzyme activity, free amino acids and minerals content, and the best enhancement was also observed in PAW-3. It was concluded that PAWs would be an effective technique to enhance the growth and nutritional properties of crop sprouts, which could be served as functional foods in many forms. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s00344-022-10677-3.
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Affiliation(s)
- Junhong Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510641 China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, 510006 China
- Engineering and Technological Research Centre of Guangdong Province On Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou, 510006 China
| | - Jun-Hu Cheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510641 China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, 510006 China
- Engineering and Technological Research Centre of Guangdong Province On Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou, 510006 China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510641 China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, 510006 China
- Engineering and Technological Research Centre of Guangdong Province On Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou, 510006 China
- Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland
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Effect of the pH on the Antibacterial Potential and Cytotoxicity of Different Plasma-Activated Liquids. Int J Mol Sci 2022; 23:ijms232213893. [PMID: 36430372 PMCID: PMC9693261 DOI: 10.3390/ijms232213893] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 11/06/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, different plasma-activated liquids were evaluated for their antimicrobial effects against Escherichia coli, as well as for their cytotoxicity on mammalian cells. The PALs were prepared from distilled (DIS), deionized (DI), filtered (FIL), and tap (TAP) water. Additionally, 0.9% NaCl saline solution (SAL) was plasma-activated. These PALs were prepared using 5 L/min air gliding arc plasma jet for up to 60.0 min of exposure. Subsequently, the physicochemical properties, such as, the oxidation-reduction potential (ORP), the pH, the conductivity, and the total dissolved solids (TDS) were characterized by a water multiparameter. The PALs obtained showed a drastic decrease in the pH with increasing plasma exposure time, in contrast, the conductivity and TDS increased. In a general trend, the UV-vis analyses identified a higher production of the following reactive species of nitrogen and oxygen (RONS), HNO2, H2O2, NO3-, and NO2-. Except for the plasma-activated filtered water (PAW-FIL), where there was a change in the position of NO2- and NO3- at some pHs, The higher production of HNO2 and H2O2-reactive species was observed at a low pH. Finally, the standardized suspensions of Escherichia coli were exposed to PAL for up to 60.0 min. The plasma-activated deionized water (PAW-DI pH 2.5), plasma-activated distilled water (PAW-DIS pH 2.5 and 3), and plasma-activated tap water (PAW-TAP 3.5) showed the best antimicrobial effects at exposure times of 3.0, 10.0, and 30.0 min, respectively. The MTT analysis demonstrated low toxicity of all of the PAL samples. Our results indicate that the plasma activation of different liquids using the gliding arc system can generate specific physicochemical conditions that produce excellent antibacterial effects for E. coli with a safe application, thus bringing future contributions to creating new antimicrobial protocols.
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Editorials for ‘Advances in Cold Plasma in Biomedicines’. Biomedicines 2022; 10:biomedicines10112731. [DOI: 10.3390/biomedicines10112731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 10/20/2022] [Indexed: 11/16/2022] Open
Abstract
Research in the field of plasma medicine has provided many explanations for various phenomena, as well as the involvement of the chemical elements of plasma; however, it still lacks in biological mechanism analyses [...]
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Kim S, Lee HY, Lee HR, Jang JY, Yun JH, Shin YS, Kim CH. Liquid-type plasma-controlled in situ crosslinking of silk-alginate injectable gel displayed better bioactivities and mechanical properties. Mater Today Bio 2022; 15:100321. [PMID: 35757030 PMCID: PMC9214807 DOI: 10.1016/j.mtbio.2022.100321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/03/2022] [Accepted: 06/07/2022] [Indexed: 12/02/2022]
Abstract
Silk is a promising biomaterial for injectable hydrogel, but its long-gelation time and cytotoxic crosslinking methods are the main obstacles for clinical application. Here, we purpose a new in situ crosslinking technique of silk-alginate (S-A) injectable hydrogel using liquid-type non-thermal atmospheric plasma (LTP) in vocal fold (VF) wound healing. We confirmed that LTP induces the secondary structure of silk in a dose-dependent manner, resulting in improved mechanical properties. Significantly increased crosslinking of silk was observed with reduced gelation time. Moreover, controlled release of nitrate, an LTP effectors, from LTP-treated S-A hydrogel was detected over 7 days. In vitro experiments regarding biocompatibility showed activation of fibroblasts beyond the non-cytotoxicity of LTP-treated S-A hydrogels. An in vivo animal model of VF injury was established in New Zealand White rabbits. Full-thickness injury was created on the VF followed by hydrogel injection. In histologic analyses, LTP-treated S-A hydrogels significantly reduced a scar formation and promoted favorable wound healing. Functional analysis using videokymography showed eventual viscoelastic recovery. The LTP not only changes the mechanical structures of a hydrogel, but also has sustained biochemical effects on the damaged tissue due to controlled release of LTP effectors, and that LTP-treated S-A hydrogel can be used to enhance wound healing after VF injury.
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Affiliation(s)
- Sungryeal Kim
- Department of Otolaryngology, College of Medicine, Inha University, Incheon, South Korea.,Department of Medical Sciences, Graduate School of Ajou University, Suwon, South Korea
| | - Hye-Young Lee
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, South Korea
| | - Hye Ran Lee
- Department of Otorhino-laryngology-Head and Neck Surgery, Catholic Kwandong University, College of Medicine, Incheon, South Korea
| | - Jeon Yeob Jang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, South Korea
| | - Ju Hyun Yun
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, South Korea
| | - Yoo Seob Shin
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, South Korea
| | - Chul-Ho Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, South Korea
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Degradation of Bacterial Antibiotic Resistance Genes during Exposure to Non-Thermal Atmospheric Pressure Plasma. Antibiotics (Basel) 2022; 11:antibiotics11060747. [PMID: 35740152 PMCID: PMC9219888 DOI: 10.3390/antibiotics11060747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/25/2022] [Accepted: 05/26/2022] [Indexed: 11/16/2022] Open
Abstract
Bacterial resistance to antibiotics has become a major public health problem in recent years. The occurrence of antibiotics in the environment, especially in wastewater treatment plants, has contributed to the development of antibiotic-resistant bacteria (ARB) and the spread of antibiotic resistance genes (ARGs). Despite the potential of some conventional processes used in wastewater treatment plants, the removal of ARB and ARGs remains a challenge that requires further research and development of new technologies to avoid the release of emerging contaminants into aquatic environments. Non-thermal atmospheric pressure plasmas (NTAPPs) have gained a significant amount of interest for wastewater treatment due to their oxidizing potential. They have shown their effectiveness in the inactivation of a wide range of bacteria in several fields. In this review, we discuss the application of NTAPPs for the degradation of antibiotic resistance genes in wastewater treatment.
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