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Zou P, Liu J, Li P, Luan Q. Antifungal Activity, Synergism with Fluconazole or Amphotericin B and Potential Mechanism of Direct Current against Candida albicans Biofilms and Persisters. Antibiotics (Basel) 2024; 13:521. [PMID: 38927187 PMCID: PMC11200915 DOI: 10.3390/antibiotics13060521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/28/2024] Open
Abstract
Candida albicans, as a notorious fungal pathogen, is associated with high morbidity and mortality worldwide due to its ability to form biofilms and persisters that can withstand currently available antifungals. Direct current (DC) has demonstrated a promising antimicrobial effect and synergistic effect with antimicrobials against various infections. Here, we first found DC exerted a killing effect on C. albicans planktonic and biofilm cells. Moreover, DC showed a synergistic effect with fluconazole (FLC) and amphotericin B (AMB). Notably, near-to-complete eradication of AMB-tolerant C. albicans biofilm persisters was achieved upon DC treatment. Next, the mechanism of action of DC was explored through mapping the genes and proteomic profiles of DC-treated C. albicans. The multi-omics analysis, quantitative real-time PCR and assay of reactive oxygen species (ROS) demonstrated DC exerted an antifungal effect on C. albicans by increasing cellular oxidative stress. As revealed by multiple analyses (e.g., protein assay based on absorbance at 280 nm and rhodamine 6G assay), DC was able to enhance membrane permeability, inhibit drug efflux and increase cellular FLC/AMB concentration of C. albicans, thereby mediating its synergism with the antifungals. Furthermore, DC inhibited superoxide dismutase 2 (SOD2) expression and manganese-containing SOD (Mn SOD) activity, leading to ROS production and enhanced killing of C. albicans biofilm persisters. The current findings demonstrate that the adjunctive use of DC in combination with antifungals is a promising strategy for effective control of C. albicans infections and management of antifungal resistance/tolerance in Candida biofilms.
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Affiliation(s)
| | | | - Peng Li
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing 100081, China; (P.Z.); (J.L.)
| | - Qingxian Luan
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing 100081, China; (P.Z.); (J.L.)
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2
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Bujňáková D, Bucko S, Češkovič M, Kmeť V, Karahutová L. The effect of exposure to non-ionising radiofrequency field on Escherichia coli, Klebsiella oxytoca and Pseudomonas aeruginosa biofilms. ENVIRONMENTAL TECHNOLOGY 2023; 44:3813-3819. [PMID: 35506486 DOI: 10.1080/09593330.2022.2074317] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 04/26/2022] [Indexed: 06/14/2023]
Abstract
An environment with a higher accumulation of electromagnetic non-ionising radiofrequency (RF) emissions generated by various telecommunication, data transport and navigation devices (mobile phones, Wi-Fi, radar, etc.) may have a major impact on biological systems. This study aimed to evaluate the incidence of an electromagnetic field (EMF) on the development of bacterial biofilm. Quantification of biofilm production was done by using microtiter plate assay. Bacterial isolates of Escherichia coli, Klebsiella oxytoca and Pseudomonas aeruginosa were exposed with EMF of frequencies 1-5 and 2.4 GHz with an exposure time 3 or 24 h, respectively. Exposure of bacteria to EMF produced a statistically significant increase in biofilm production mainly at 1, 2 and 4 GHz, and in contrast, a significant inhibition of biofilm development occurred at frequencies 3 and 5 GHz, both with exception of K. oxytoca and P. aeruginosa. Wi-Fi operating at 2.4 GHz caused biofilm reduction. The results indicate that EMF exposure act on bacteria in both ways, depending on the frequency: as stressful by enhancing bacterial biofilm formation (under environmental stress, bacteria produce a polysaccharide matrix and aggregate to form biofilms to increase virulence and resistance), although some frequencies leading to biofilm damage could be caused by changes to the physicochemical properties of bacteria.
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Affiliation(s)
- Dobroslava Bujňáková
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Košice, Slovak Republic
| | - Samuel Bucko
- Faculty of Electrical Engineering and Informatics, Technical University of Košice, Košice, Slovak Republic
| | - Marek Češkovič
- Faculty of Aeronautics, Technical University of Košice, Košice, Slovak Republic
| | - Vladimír Kmeť
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Košice, Slovak Republic
| | - Lívia Karahutová
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Košice, Slovak Republic
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3
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Zheng M, Chen S, Yao Y, Wu N, Xu M, Zhao Y, Tu Y. A review on the development of pickled eggs: rapid pickling and quality optimization. Poult Sci 2022; 102:102468. [PMID: 36682130 PMCID: PMC9876998 DOI: 10.1016/j.psj.2022.102468] [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: 09/07/2022] [Revised: 12/28/2022] [Accepted: 12/28/2022] [Indexed: 01/02/2023] Open
Abstract
Pickled eggs enjoy a long processing history with unique flavor and rich nutrition but suffer from long pickling cycle due to the limitations of traditional processing methods. In terms of quality, salted egg whites have the disadvantage of high sodium content, and salted egg yolks have problems such as hard core and black circle around outer layer. Likewise, the quality of preserved eggs is challenged by the black spots (dots) on the eggshells and the high content of heavy metals in the egg contents. The sustainable development of traditional pickled eggs are hindered by these defects and extensive research has been carried out in recent years. Based on the elaboration of the quality formation mechanism of salted eggs and preserved eggs, this paper reviewed the processing principles and applications of rapid pickling technologies like ultrasonic technology, magnetoelectric-assisted technology, water cycle technology, vacuum decompression technology, and pulsed pressure technology, as well as the quality optimization methods such as controlling the sodium content of the salted egg whites, improving the quality of salted egg yolks, promoting the quality of lead-free preserved eggs, and developing heavy metal-free preserved eggs. In the end, the future development trend of traditional pickled eggs was summarized and prospected in order to provide theoretical guidance for the actual production.
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Affiliation(s)
- Mengting Zheng
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang, 330045, China,Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China,Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shuping Chen
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang, 330045, China,Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China,Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yao Yao
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang, 330045, China,Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China,Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Na Wu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang, 330045, China,Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China,Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Mingsheng Xu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang, 330045, China,Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China,Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yan Zhao
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang, 330045, China,Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China,Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yonggang Tu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang, 330045, China; Agricultural Products Processing and Quality Control Engineering Laboratory of Jiangxi, Jiangxi Agricultural University, Nanchang 330045, China; Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
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4
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Zhang Z, Wang J, Hu Y, Wang L. Microwaves, a potential treatment for bacteria: A review. Front Microbiol 2022; 13:888266. [PMID: 35958124 PMCID: PMC9358438 DOI: 10.3389/fmicb.2022.888266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/05/2022] [Indexed: 02/03/2023] Open
Abstract
Bacteria have brought great harm to the public, especially after the emergence of multidrug-resistant bacteria. This has rendered traditional antibiotic therapy ineffective. In recent years, hyperthermia has offered new treatments to remove bacteria. Microwaves (MW) are a component of the electromagnetic spectrum and can rapidly heat materials. Taking advantage of this characteristic of MW, related studies have shown that both thermal and non-thermal effects of MW can inactivate various bacteria. Even though the understanding of MW in the field of bacteria is not sufficient for widespread use at present, MW has performed well in dealing with microorganisms and controlling infection. This review will focus on the application of MW in bacteria and discuss the advantages, prospects and challenges of using MW in the bacterial field.
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Affiliation(s)
- Zhen Zhang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
| | - Jiahao Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
| | - Yihe Hu
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- Department of Orthopedics, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Long Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Long Wang,
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5
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Marutyan S, Marutyan S, Navasardyan L, Hovnanyan K, Trchounian A. Changes in growth kinetic parameters, morphology and mitotic activity of yeasts Candida guilliermondii exposed to the low-intensity waves of 51.8-GHz frequency. Arch Microbiol 2021; 203:3707-3714. [PMID: 33938972 DOI: 10.1007/s00203-021-02336-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 04/03/2021] [Accepted: 04/16/2021] [Indexed: 11/27/2022]
Abstract
Under the influence of electromagnetic waves of millimeter range with the frequency of 51.8 GHz, changes in the morphology, growth parameters and mitotic activity of yeasts C. guilliermondii NP-4 are revealed. Filamentous and giant cells appeared in a population of exposed yeasts. The sigmoid shape of the growth curve remained but the lag phase duration was increased by 2 h in comparison with non-exposed yeasts; accordingly, the log and stationary phases followed 2 h later. The specific growth rate in the log growth phase and colony-forming ability of exposed yeasts was decreased. It is suggested that yeasts have some response mechanisms to 51.8-GHz frequency electromagnetic waves. The results can be used to understand the response mechanisms of microorganisms to non-ionizing radiation, as well as to develop approaches to protect living organisms from it. The effect of electromagnetic waves of 51.8-GHz frequency to suppress yeasts can be applied in biotechnology and medicine.
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Affiliation(s)
- Seda Marutyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia
| | - Syuzan Marutyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia
| | - Liparit Navasardyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia
| | - Karlen Hovnanyan
- Scientific and Technological Center of Organic and Pharmaceutical Chemistry, National Academy of Sciences of RA, 26 Azatutyan Str, 0014, Yerevan, Armenia
| | - Armen Trchounian
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia.
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Riffo B, Henríquez C, Chávez R, Peña R, Sangorrín M, Gil-Duran C, Rodríguez A, Ganga MA. Nonionizing Electromagnetic Field: A Promising Alternative for Growing Control Yeast. J Fungi (Basel) 2021; 7:jof7040281. [PMID: 33918089 PMCID: PMC8070080 DOI: 10.3390/jof7040281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/03/2021] [Accepted: 04/04/2021] [Indexed: 11/16/2022] Open
Abstract
In the food industry, some fungi are considered to be common spoilage microorganisms which reduce the shelf life of products. To avoid this outcome, different technologies are being developed to control their growth. Electromagnetic fields (EMF) have been used to combat bacterial growth, but there are few studies on yeasts and their possible action mechanisms. For this reason, we studied the effect of EMF between 1 to 5.9 GHz bands on the growth of Saccharomyces cerevisiae yeast and observed that all the frequencies of the band used cause the reduction of the viability of this yeast. In addition, we observed that the distance between the antenna and the sample is an important factor to consider to control the growing yeast. By using transmission electron microscopy, we found that the EMF caused a loss of continuity of the yeast cell membrane. Therefore, EMF may be used as a control method for yeast growth.
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Affiliation(s)
- Byron Riffo
- Departamento de Ciencia y Tecnología de los Alimentos, Facultad Tecnológica, Universidad de Santiago de Chile, Alameda 3363, Santiago 9170022, Chile; (B.R.); (C.H.); (R.P.)
| | - Consuelo Henríquez
- Departamento de Ciencia y Tecnología de los Alimentos, Facultad Tecnológica, Universidad de Santiago de Chile, Alameda 3363, Santiago 9170022, Chile; (B.R.); (C.H.); (R.P.)
| | - Renato Chávez
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda 3363, Santiago 9170022, Chile; (R.C.); (C.G.-D.)
| | - Rubén Peña
- Departamento de Ciencia y Tecnología de los Alimentos, Facultad Tecnológica, Universidad de Santiago de Chile, Alameda 3363, Santiago 9170022, Chile; (B.R.); (C.H.); (R.P.)
| | - Marcela Sangorrín
- Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas PROBIEN, Universidad Nacional del Comahue, Consejo Nacional de Investigaciones Científicas y Tecnológicas, Buenos Aires 1400, Argentina;
| | - Carlos Gil-Duran
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda 3363, Santiago 9170022, Chile; (R.C.); (C.G.-D.)
| | - Arturo Rodríguez
- Departamento de Tecnologías Industriales, Facultad Tecnológica, Universidad de Santiago de Chile, Alameda 3363, Santiago 9170022, Chile
- Correspondence: (A.R.); (M.A.G.)
| | - María Angélica Ganga
- Departamento de Ciencia y Tecnología de los Alimentos, Facultad Tecnológica, Universidad de Santiago de Chile, Alameda 3363, Santiago 9170022, Chile; (B.R.); (C.H.); (R.P.)
- Correspondence: (A.R.); (M.A.G.)
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7
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Manoyan J, Gabrielyan L, Kalantaryan V, Trchounian A. Growth properties and hydrogen yield in green microalga Parachlorella kessleri: Effects of low-intensity electromagnetic irradiation at the frequencies of 51.8 GHz and 53.0 GHz. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2020; 211:112016. [PMID: 32920483 DOI: 10.1016/j.jphotobiol.2020.112016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 12/01/2022]
Abstract
The current research reports the effects of low-intensity extremely high frequency electromagnetic irradiation (EMI) of 51.8 GHz and 53.0 GHz on green microalga Parachlorella kessleri RA-002 isolated in Armenia. EMI demonstrated different effects on the growth properties of microalgae under various conditions. Under aerobic conditions a positive effect of EMI on the growth rate of P. kessleri and the content of photosynthetic pigments were observed. The data obtained indicates a significant role of O2, since the enhancing effect of EMI was determined only under aerobic conditions. Meanwhile under anaerobic conditions EMI with both frequencies caused inhibition of algal growth and a decrease in the amount of photosynthetic pigments. EMI also inhibited the yield of H2 production in P. kessleri, which was partially restored after 5-day cultivation due to the existence of protective mechanisms in this alga. The results might indicate membrane-bound mechanisms of EMI action on algae, which can be associated with the effects on photosynthetic pigments and membrane-associated enzymes responsible for H2 production. The results are useful for the development of algae biotechnology and the possibility of using EMI as a factor which regulates the production of biomass and biohydrogen by green microalgae.
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Affiliation(s)
- Jemma Manoyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoukian Str, 0025 Yerevan, Armenia
| | - Lilit Gabrielyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoukian Str, 0025 Yerevan, Armenia
| | - Vitaly Kalantaryan
- Department of Telecommunication and Signal Processing, Yerevan State University, 1 A. Manoukian Str, 0025 Yerevan, Armenia
| | - Armen Trchounian
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoukian Str, 0025 Yerevan, Armenia.
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8
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Magnetic Fields in Food Processing Perspectives, Applications and Action Models. Processes (Basel) 2020. [DOI: 10.3390/pr8070814] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Magnetic fields (MF) are increasingly being applied in food processing to preserve food quality. They can be static (SMF), oscillating (OMF) or pulsed (PMF) depending on the type of equipment. The food characteristics can be influenced by several configurations of the applied magnetic field as its flux density, frequency, polarity and exposure time. Several mechanisms have been proposed to explain the effects of magnetic fields on foods. Some of them propose interactions at the subatomic particle level that show quantum behavior, such as the radical pair and cyclotron resonance mechanisms. Other proposals are at the level of DNA, compounds, subcellular organelles and cells. The interactions between food and magnetic fields are addressed in a general way in this work, highlighting the applications and action models involved and their effects on the physicochemical, enzymatic and microbiological characteristics of food.
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9
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Amani S, Taheri M, Movahedi MM, Mohebi M, Nouri F, Mehdizadeh A. Evaluation of Short-Term Exposure to 2.4 GHz Radiofrequency Radiation Emitted from Wi-Fi Routers on the Antimicrobial Susceptibility of Pseudomonas aeruginosa and Staphylococcus aureus. Galen Med J 2020; 9:e1580. [PMID: 34466555 PMCID: PMC8344163 DOI: 10.31661/gmj.v9i0.1580] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/14/2019] [Accepted: 08/06/2019] [Indexed: 11/16/2022] Open
Abstract
Background Overuse of antibiotics is a cause of bacterial resistance. It is known that electromagnetic waves emitted from electrical devices can cause changes in biological systems. This study aimed at evaluating the effects of short-term exposure to electromagnetic fields emitted from common Wi-Fi routers on changes in antibiotic sensitivity to opportunistic pathogenic bacteria. Materials and Methods Standard strains of bacteria were prepared in this study. Antibiotic susceptibility test, based on the Kirby-Bauer disk diffusion method, was carried out in Mueller-Hinton agar plates. Two different antibiotic susceptibility tests for Staphylococcus aureus and Pseudomonas aeruginosa were conducted after exposure to 2.4-GHz radiofrequency radiation. The control group was not exposed to radiation. Results Our findings revealed that by increasing the duration of exposure to electromagnetic waves at a frequency of 2.4 GHz, bacterial resistance increased against S. aureus and P. aeruginosa, especially after 24 hours (P<0.05). Conclusion The use of electromagnetic waves with a frequency of 2.4 GHz can be a suitable method for infection control and treatment.
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Affiliation(s)
- Samad Amani
- Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Taheri
- Department of Medical Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mohammad Mehdi Movahedi
- Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Mohebi
- School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh Nouri
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Mehdizadeh
- Department of Medical Physics and Medical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
- Correspondence to: Dr. Alireza Mehdizadeh, Ph.D. in Medical Physics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran Telephone Number: 0711-2349332 Email Address:
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Sahakyan N, Petrosyan M, Trchounian A. The Activity of Alkanna Species in vitro Culture and Intact Plant Extracts Against Antibiotic Resistant Bacteria. Curr Pharm Des 2020; 25:1861-1865. [PMID: 31333091 DOI: 10.2174/1381612825666190716112510] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 06/28/2019] [Indexed: 11/22/2022]
Abstract
Overcoming the antibiotic resistance is nowadays a challenge. There is still no clear strategy to combat this problem. Therefore, the urgent need to find new sources of antibacterial agents exists. According to some literature, substances of plant origin are able to overcome bacterial resistance against antibiotics. Alkanna species plants are among the valuable producers of these metabolites. But there is a problem of obtaining the standardized product. So, this review is focused on the discussion of the possibilities of biotechnological production of antimicrobial agents from Alkanna genus species against some microorganisms including antibiotic resistant bacterial strains.
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Affiliation(s)
- Naira Sahakyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, Yerevan 0025, Armenia
| | - Margarit Petrosyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, Yerevan 0025, Armenia
| | - Armen Trchounian
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, Yerevan 0025, Armenia
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11
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Zhong Z, Furuya T, Ueno K, Yamaguchi H, Hitachi K, Tsuchida K, Tani M, Tian J, Komatsu S. Proteomic Analysis of Irradiation with Millimeter Waves on Soybean Growth under Flooding Conditions. Int J Mol Sci 2020; 21:E486. [PMID: 31940953 PMCID: PMC7013696 DOI: 10.3390/ijms21020486] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/03/2020] [Accepted: 01/08/2020] [Indexed: 01/01/2023] Open
Abstract
Improving soybean growth and tolerance under environmental stress is crucial for sustainable development. Millimeter waves are a radio-frequency band with a wavelength range of 1-10 mm that has dynamic effects on organisms. To investigate the potential effects of millimeter-waves irradiation on soybean seedlings, morphological and proteomic analyses were performed. Millimeter-waves irradiation improved the growth of roots/hypocotyl and the tolerance of soybean to flooding stress. Proteomic analysis indicated that the irradiated soybean seedlings recovered under oxidative stress during growth, whereas proteins related to glycolysis and ascorbate/glutathione metabolism were not affected. Immunoblot analysis confirmed the promotive effect of millimeter waves to glycolysis- and redox-related pathways under flooding conditions. Sugar metabolism was suppressed under flooding in unirradiated soybean seedlings, whereas it was activated in the irradiated ones, especially trehalose synthesis. These results suggest that millimeter-waves irradiation on soybean seeds promotes the recovery of soybean seedlings under oxidative stress, which positively regulates soybean growth through the regulation of glycolysis and redox related pathways.
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Affiliation(s)
- Zhuoheng Zhong
- Faculty of Environment and Information Sciences, Fukui University of Technology, Fukui 910-8505, Japan; (Z.Z.); (K.U.)
- College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310027, China;
| | - Takashi Furuya
- Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan; (T.F.); (M.T.)
| | - Kimitaka Ueno
- Faculty of Environment and Information Sciences, Fukui University of Technology, Fukui 910-8505, Japan; (Z.Z.); (K.U.)
| | - Hisateru Yamaguchi
- Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Japan; (H.Y.); (K.H.); (K.T.)
| | - Keisuke Hitachi
- Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Japan; (H.Y.); (K.H.); (K.T.)
| | - Kunihiro Tsuchida
- Institute for Comprehensive Medical Science, Fujita Health University, Toyoake 470-1192, Japan; (H.Y.); (K.H.); (K.T.)
| | - Masahiko Tani
- Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan; (T.F.); (M.T.)
| | - Jingkui Tian
- College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310027, China;
| | - Setsuko Komatsu
- Faculty of Environment and Information Sciences, Fukui University of Technology, Fukui 910-8505, Japan; (Z.Z.); (K.U.)
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12
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Gabrielyan L, Trchounian A. Antibacterial activities of transient metals nanoparticles and membranous mechanisms of action. World J Microbiol Biotechnol 2019; 35:162. [PMID: 31612285 DOI: 10.1007/s11274-019-2742-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 10/03/2019] [Indexed: 02/06/2023]
Abstract
Various transient metal and metal oxide nanoparticles (NPs) have shown pronounced biological activity, including antibacterial action against different Gram-negative and Gram-positive bacteria including pathogens and drug-resistant ones. Thus, NPs can be applied in nanotechnology for controlling bacterial growth as well as in biomedicine for the treatment of various diseases. However, the mechanisms of these effects are not clear yet. This review is focused on the antibacterial effects of transient metal NPs, especially iron oxide (Fe3O4) and Ag NPs on Escherichia coli wild type and antibiotic-resistant strains. Ag NPs show more pronounced bactericidal effect than Fe3O4 NPs. Moreover, Ag NPs display more expressed antibacterial effect at low concentrations. Interestingly, kanamycin-resistant strain is more susceptible to Fe3O4 NPs than wild type strain. In order to explain the possible mechanisms of NP effects, in addition to the production of reactive oxygen species causing damage in cells, particularly, their membranes, the changes in the membrane-associated H+-translocating FOF1-ATPase activity, H+-fluxes through the bacterial membrane, redox potential and hydrogen yield by membrane-associated enzymes-hydrogenases, are discussed. We observed from the results that FOF1-ATPase could be a main target for NPs. A scheme of possible action mechanism is proposed.
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Affiliation(s)
- Lilit Gabrielyan
- Department of Medical Biochemistry and Biotechnology, Russian-Armenian University, 123 H. Emin Str., 0051, Yerevan, Armenia
- Department of Biochemistry, Microbiology and Biotechnology, Biology Faculty, Yerevan State University, 1 A. Manoukian Str., 0025, Yerevan, Armenia
| | - Armen Trchounian
- Department of Medical Biochemistry and Biotechnology, Russian-Armenian University, 123 H. Emin Str., 0051, Yerevan, Armenia.
- Department of Biochemistry, Microbiology and Biotechnology, Biology Faculty, Yerevan State University, 1 A. Manoukian Str., 0025, Yerevan, Armenia.
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Mazinani SA, Noaman N, Pergande MR, Cologna S, Coorssen J, Yan H. Exposure to microwave irradiation at constant culture temperature slows the growth of Escherichia coliDE3 cells, leading to modified proteomic profiles. RSC Adv 2019; 9:11810-11817. [PMID: 35517035 PMCID: PMC9063421 DOI: 10.1039/c9ra00617f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/07/2019] [Indexed: 11/21/2022] Open
Abstract
E. coligrowth is slowed by exposure to non-lethal microwave irradiation, accompanied by changes in proteomic profiles.
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Affiliation(s)
- Sina Atrin Mazinani
- Department of Chemistry and Centre for Biotechnology
- Brock University
- Ontario
- Canada
| | - Nour Noaman
- Department of Applied Health Sciences
- Department of Biological Sciences
- Brock University
- Ontario
- Canada
| | | | | | - Jens Coorssen
- Department of Applied Health Sciences
- Department of Biological Sciences
- Brock University
- Ontario
- Canada
| | - Hongbin Yan
- Department of Chemistry and Centre for Biotechnology
- Brock University
- Ontario
- Canada
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Soghomonyan D, Trchounian A. The survival of irradiated lactobacilli in the simulated gastrointestinal conditions with antibiotic ceftazidime. Lett Appl Microbiol 2018; 68:31-37. [PMID: 30269343 DOI: 10.1111/lam.13080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/22/2018] [Accepted: 09/24/2018] [Indexed: 01/09/2023]
Abstract
Lactobacillus acidophilus is one of the widespread probiotic bacteria that can overcome acid and bile barrier of stomach and intestine, respectively, and then have beneficial effects on the host improving its intestinal microbial balance. The cell membrane FO F1 -ATPase is an important factor in the response and tolerance to low pH through the action of controlling the H+ concentration between the cell cytoplasm and external medium. In this study, the effects of extremely high-frequency EMI at the frequencies of 51·8 GHz and 53 GHz and cetfazidime ( μmol l-1 ) on survival of L. acidophilus VKM B-1660 in the gastrointestinal model in vitro and on ATPase activity of their membrane vesicles were investigated. Irradiated L. acidophilus survived in media with acid pH; the irradiation stimulated N,N'-dicyclohexylcarbodiimide-sensitive FO F1 -ATPase activity under acidic conditions, but enhanced the inhibitory effects of ceftazidime. Probably irradiated L. acidophilus is overcoming the acid barrier even in the presence of ceftazidime due to the FO F1 -ATPase. The obtained results can allow the use of L. acidophilus in food industry, veterinary and medicine. SIGNIFICANCE AND IMPACT OF THE STUDY: The probiotic property of lactobacilli is defined with survival in different conditions of human digestive tract even in the presence of antibiotics and subjected to electromagnetic irradiation (EMI) at the extremely high frequency. Despite the fact that EMI and antibiotic ceftazidime affected Lactobacillus acidophilus; the viable number of bacterial cells was decreased in in vitro gastrointestinal model, but they could to grow in fresh growth medium. The changes in the FO F1 -ATPase activity were obtained at acidic pH. Thus, these bacteria can overcome acid barrier due to the FO F1 -ATPase: the irradiation stimulates the FO F1 -ATPase activity in the acidic conditions, but enhances the effects of ceftazidime. The results are important for identifying the mechanisms of lactobacilli survival for physical and chemical factors and valuable for use.
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Affiliation(s)
- D Soghomonyan
- Research Institute of Biology, Yerevan State University, Yerevan, Armenia
| | - A Trchounian
- Research Institute of Biology, Yerevan State University, Yerevan, Armenia.,Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, Yerevan, Armenia
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Russell CL. 5 G wireless telecommunications expansion: Public health and environmental implications. ENVIRONMENTAL RESEARCH 2018; 165:484-495. [PMID: 29655646 DOI: 10.1016/j.envres.2018.01.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 01/16/2018] [Indexed: 06/08/2023]
Abstract
The popularity, widespread use and increasing dependency on wireless technologies has spawned a telecommunications industrial revolution with increasing public exposure to broader and higher frequencies of the electromagnetic spectrum to transmit data through a variety of devices and infrastructure. On the horizon, a new generation of even shorter high frequency 5G wavelengths is being proposed to power the Internet of Things (IoT). The IoT promises us convenient and easy lifestyles with a massive 5G interconnected telecommunications network, however, the expansion of broadband with shorter wavelength radiofrequency radiation highlights the concern that health and safety issues remain unknown. Controversy continues with regards to harm from current 2G, 3G and 4G wireless technologies. 5G technologies are far less studied for human or environmental effects. It is argued that the addition of this added high frequency 5G radiation to an already complex mix of lower frequencies, will contribute to a negative public health outcome both from both physical and mental health perspectives. Radiofrequency radiation (RF) is increasingly being recognized as a new form of environmental pollution. Like other common toxic exposures, the effects of radiofrequency electromagnetic radiation (RF EMR) will be problematic if not impossible to sort out epidemiologically as there no longer remains an unexposed control group. This is especially important considering these effects are likely magnified by synergistic toxic exposures and other common health risk behaviors. Effects can also be non-linear. Because this is the first generation to have cradle-to-grave lifespan exposure to this level of man-made microwave (RF EMR) radiofrequencies, it will be years or decades before the true health consequences are known. Precaution in the roll out of this new technology is strongly indicated. This article will review relevant electromagnetic frequencies, exposure standards and current scientific literature on the health implications of 2G, 3G, 4G exposure, including some of the available literature on 5G frequencies. The question of what constitutes a public health issue will be raised, as well as the need for a precautionary approach in advancing new wireless technologies.
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Gabrielyan L, Kalantaryan V, Trchounian A. The Effect of Electromagnetic Radiation at Frequencies of 51.8 and 53.0 GHz on Growth, Pigment Content, Hydrogen Photoemission, and F0F1-ATPase Activity in the Purple Bacterium Rhodobacter sphaeroides. Biophysics (Nagoya-shi) 2018. [DOI: 10.1134/s0006350918030077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Di Lodovico S, Del Vecchio A, Cataldi V, Di Campli E, Di Bartolomeo S, Cellini L, Di Giulio M. Microbial Contamination of Smartphone Touchscreens of Italian University Students. Curr Microbiol 2017; 75:336-342. [PMID: 29247337 DOI: 10.1007/s00284-017-1385-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 10/30/2017] [Indexed: 12/22/2022]
Abstract
In this study, the microbial contamination of smartphones from Italian University students was analyzed. A total of 100 smartphones classified as low, medium, and high emission were examined. Bacteria were isolated on elective and selective media and identified by biochemical tests. The mean values of cfu/cm2 were 0.79 ± 0.01; in particular, a mean of 1.21 ± 0.12, 0.77 ± 0.1 and 0.40 ± 0.10 cfu/cm2 was present on smartphones at low, medium, and high emission, respectively. The vast majority of identified microorganisms came from human skin, mainly Staphylococci, together with Gram-negative and positive bacilli and yeasts. Moreover, the main isolated species and their mixture were exposed for 3 h to turned on and off smartphones to evaluate the effect of the electromagnetic wave emission on the bacterial cultivability, viability, morphology, and genotypic profile in respect to the unexposed broth cultures. A reduction rate of bacterial growth of 79 and 46% was observed in Staphylococcus aureus and Staphylococcus epidermidis broth cultures, respectively, in the presence of turned on smartphone. No differences in viability were observed in all detected conditions. Small colony variants and some differences in DNA fingerprinting were detected on bacteria when the smartphones were turned on in respect to the other conditions. The colonization of smartphones was limited to human skin microorganisms that can acquire phenotype and genotypic modifications when exposed to microwave emissions.
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Affiliation(s)
- Silvia Di Lodovico
- Department of Pharmacy, "G. d'Annunzio" University, Chieti-Pescara, Via dei Vestini 31, 66100, Chieti Scalo, Italy
| | - Angela Del Vecchio
- Department of Pharmacy, "G. d'Annunzio" University, Chieti-Pescara, Via dei Vestini 31, 66100, Chieti Scalo, Italy
| | - Valentina Cataldi
- Department of Pharmacy, "G. d'Annunzio" University, Chieti-Pescara, Via dei Vestini 31, 66100, Chieti Scalo, Italy
| | - Emanuela Di Campli
- Department of Pharmacy, "G. d'Annunzio" University, Chieti-Pescara, Via dei Vestini 31, 66100, Chieti Scalo, Italy
| | - Soraya Di Bartolomeo
- Department of Pharmacy, "G. d'Annunzio" University, Chieti-Pescara, Via dei Vestini 31, 66100, Chieti Scalo, Italy
| | - Luigina Cellini
- Department of Pharmacy, "G. d'Annunzio" University, Chieti-Pescara, Via dei Vestini 31, 66100, Chieti Scalo, Italy.
| | - Mara Di Giulio
- Department of Pharmacy, "G. d'Annunzio" University, Chieti-Pescara, Via dei Vestini 31, 66100, Chieti Scalo, Italy
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Soghomonyan D, Margaryan A, Trchounian K, Ohanyan K, Badalyan H, Trchounian A. The Effects of Low Doses of Gamma-Radiation on Growth and Membrane Activity of Pseudomonas aeruginosa GRP3 and Escherichia coli M17. Cell Biochem Biophys 2017; 76:209-217. [PMID: 29039057 DOI: 10.1007/s12013-017-0831-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 10/09/2017] [Indexed: 11/26/2022]
Abstract
Microorganisms are part of the natural environments and reflect the effects of different physical factors of surrounding environment, such as gamma (γ) radiation. This work was devoted to the study of the influence of low doses of γ radiation with the intensity of 2.56 μW (m2 s)-1 (absorbed doses were 3.8 mGy for the radiation of 15 min and 7.2 mGy-for 30 min) on Escherichia coli M-17 and Pseudomonas aeruginosa GRP3 wild type cells. The changes of bacterial, growth, survival, morphology, and membrane activity had been studied after γ irradiation. Verified microbiological (specific growth rate, lag phase duration, colony-forming units (CFU) number, and light microscopy digital image analysis), biochemical (ATPase activity of bacterial membrane vesicles), and biophysical (H+ fluxes throughout cytoplasmic membrane of bacteria) methods were used for assessment of radiation implications on bacteria. It was shown that growth specific rate, lag phase duration and CFU number of these bacteria were lowered after irradiation, and average cell surface area was decreased too. Moreover ion fluxes of bacteria were changed: for P. aeruginosa they were decreased and for E. coli-increased. The N,N'-dicyclohexylcarbodiimide (DCCD) sensitive fluxes were also changed which were indicative for the membrane-associated F0F1-ATPase enzyme. ATPase activity of irradiated membrane vesicles was decreased for P. aeruginosa and stimulated for E. coli. Furthermore, DCCD sensitive ATPase activity was also changed. The results obtained suggest that these bacteria especially, P. aeruginosa are sensitive to γ radiation and might be used for developing new monitoring methods for estimating environmental changes after γ irradiation.
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Affiliation(s)
- D Soghomonyan
- Research Institute of Biology, Biology Faculty, Yerevan State University, 1A. Manoogian, 0025, Yerevan, Armenia
| | - A Margaryan
- Research Institute of Biology, Biology Faculty, Yerevan State University, 1A. Manoogian, 0025, Yerevan, Armenia
| | - K Trchounian
- Research Institute of Biology, Biology Faculty, Yerevan State University, 1A. Manoogian, 0025, Yerevan, Armenia
| | - K Ohanyan
- Department of Nuclear Physics, Yerevan State University, 1A. Manoogian, 0025, Yerevan, Armenia
| | - H Badalyan
- Department of General Physics and Astrophysics, Yerevan State University, 1A. Manoogian, 0025, Yerevan, Armenia
| | - A Trchounian
- Research Institute of Biology, Biology Faculty, Yerevan State University, 1A. Manoogian, 0025, Yerevan, Armenia.
- Department of Biochemistry Microbiology and Biotechnology, Yerevan State University, 1A. Manoogian, 0025, Yerevan, Armenia.
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Mortazavi SMJ, Zarei S, Taheri M, Tajbakhsh S, Mortazavi SA, Ranjbar S, Momeni F, Masoomi S, Ansari L, Movahedi MM, Taeb S, Zarei S, Haghani M. Sensitivity to Antibiotics of Bacteria Exposed to Gamma Radiation Emitted from Hot Soils of the High Background Radiation Areas of Ramsar, Northern Iran. THE INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE 2017; 8:80-84. [PMID: 28432369 PMCID: PMC6679611 DOI: 10.15171/ijoem.2017.958] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 01/23/2017] [Indexed: 11/09/2022]
Abstract
BACKGROUND Over the past several years our laboratories have investigated different aspects of the challenging issue of the alterations in bacterial susceptibility to antibiotics induced by physical stresses. OBJECTIVE To explore the bacterial susceptibility to antibiotics in samples of Salmonella enterica subsp. enterica serovar Typhimurium (S. typhimurium), Staphylococcus aureus, and Klebsiella pneumoniae after exposure to gamma radiation emitted from the soil samples taken from the high background radiation areas of Ramsar, northern Iran. METHODS Standard Kirby-Bauer test, which evaluates the size of the zone of inhibition as an indicator of the susceptibility of different bacteria to antibiotics, was used in this study. RESULTS The maximum alteration of the diameter of inhibition zone was found for K. pneumoniae when tested for ciprofloxacin. In this case, the mean diameter of no growth zone in non-irradiated control samples of K. pneumoniae was 20.3 (SD 0.6) mm; it was 14.7 (SD 0.6) mm in irradiated samples. On the other hand, the minimum changes in the diameter of inhibition zone were found for S. typhimurium and S. aureus when these bacteria were tested for nitrofurantoin and cephalexin, respectively. CONCLUSION Gamma rays were capable of making significant alterations in bacterial susceptibility to antibiotics. It can be hypothesized that high levels of natural background radiation can induce adaptive phenomena that help microorganisms better cope with lethal effects of antibiotics.
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Affiliation(s)
- Seyed Mohammad Javad Mortazavi
- Department of Diagnostic Imaging, Fox Chase Cancer Center, 333 Cottman Ave, Philadelphia, PA 19111, USA. .,Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - Samira Zarei
- Department of Microbiology and Parasitology, Faculty of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Mohammad Taheri
- Department of Microbiology, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Saeed Tajbakhsh
- Department of Microbiology and Parasitology, Faculty of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran.,The Persian Gulf Tropical Medicine Research Center, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Seyed Alireza Mortazavi
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sahar Ranjbar
- Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Farideh Momeni
- Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Samaneh Masoomi
- Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Leila Ansari
- Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Mehdi Movahedi
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Shahram Taeb
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sina Zarei
- Varastegan University of Medical Sciences, Shiraz, Iran
| | - Masood Haghani
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
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Epitaxy of the bound water phase on hydrophilic surfaces of biopolymers as key mechanism of microwave radiation effects on living objects. Colloids Surf B Biointerfaces 2017; 154:40-47. [DOI: 10.1016/j.colsurfb.2017.03.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 01/20/2017] [Accepted: 03/05/2017] [Indexed: 11/24/2022]
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Gabrielyan L, Sargsyan H, Trchounian A. Biohydrogen production by purple non-sulfur bacteria Rhodobacter sphaeroides: Effect of low-intensity electromagnetic irradiation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:592-596. [PMID: 27479839 DOI: 10.1016/j.jphotobiol.2016.07.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 07/23/2016] [Accepted: 07/26/2016] [Indexed: 02/03/2023]
Abstract
The present work was focused on the effects of low-intensity (the flux capacity was of 0.06mWcm(-2)) electromagnetic irradiation (EMI) of extremely high frequencies or millimeter waves on the growth and hydrogen (H2) photoproduction by purple non-sulfur bacteria Rhodobacter sphaeroides MDC6521 (from Armenian mineral springs). After exposure of R. sphaeroides, grown under anaerobic conditions upon illumination, to EMI (51.8GHz and 53.0GHz) for 15min an increase of specific growth rate by ~1.2-fold, in comparison with control (non-irradiated cells), was obtained. However, the effect of EMI depends on the duration of irradiation: the exposure elongation up to 60min caused the delay of the growth lag phase and the decrease specific growth rate by ~1.3-fold, indicating the bactericidal effect of EMI. H2 yield of the culture, irradiated by EMI for 15min, determined during 72h growth, was ~1.2-fold higher than H2 yield of control cells, whereas H2 production by cultures, irradiated by EMI for 60min was not observed during 72h growth. This difference in the effects of extremely high frequency EMI indicates a direct effect of radiation on the membrane transfer and the enzymes of these bacteria. Moreover, EMI increased DCCD-inhibited H(+) fluxes across the bacterial membrane and DCCD-sensitive ATPase activity of membrane vesicles, indicating that the proton FoF1-ATPase is presumably a basic target for extremely high frequency EMI related to H2 production by cultures.
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Affiliation(s)
- Lilit Gabrielyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoukian Str., 0025 Yerevan, Armenia; Research Institute of Biology, Yerevan State University, 1 A. Manoukian Str., 0025 Yerevan, Armenia
| | - Harutyun Sargsyan
- Research Institute of Biology, Yerevan State University, 1 A. Manoukian Str., 0025 Yerevan, Armenia
| | - Armen Trchounian
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoukian Str., 0025 Yerevan, Armenia; Research Institute of Biology, Yerevan State University, 1 A. Manoukian Str., 0025 Yerevan, Armenia.
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Comparative Analysis of UV Irradiation Effects on Escherichia coli and Pseudomonas aeruginosa Bacterial Cells Utilizing Biological and Computational Approaches. Cell Biochem Biophys 2016; 74:381-9. [DOI: 10.1007/s12013-016-0748-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 06/09/2016] [Indexed: 01/27/2023]
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Soghomonyan D, Trchounian K, Trchounian A. Millimeter waves or extremely high frequency electromagnetic fields in the environment: what are their effects on bacteria? Appl Microbiol Biotechnol 2016; 100:4761-71. [DOI: 10.1007/s00253-016-7538-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 04/02/2016] [Accepted: 04/05/2016] [Indexed: 12/11/2022]
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Vardanyan Z, Gevorkyan V, Ananyan M, Vardapetyan H, Trchounian A. Effects of various heavy metal nanoparticles on Enterococcus hirae and Escherichia coli growth and proton-coupled membrane transport. J Nanobiotechnology 2015; 13:69. [PMID: 26474562 PMCID: PMC4609144 DOI: 10.1186/s12951-015-0131-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 10/06/2015] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Due to bacterial resistance to antibiotics there is a need for new antimicrobial agents. In this respect nanoparticles can be used as they have expressed antibacterial activity simultaneously being more reactive compared to their bulk material. The action of zinc (II), titanium (IV), copper (II) and (I) oxides thin films with nanostructured surface and silver nanoscale particles on Enterococcus hirae and Escherichia coli growth and membrane activity was studied by using microbiological, potentiometric and spectrophotometric methods. RESULTS It was revealed that sapphire base plates with deposited ZnO, TiO2, CuO and Cu2O nanoparticles had no effects neither on E. hirae nor E. coli growth both on agar plates and in liquid medium. Concentrated Ag nanoparticles colloid solution markedly affected bacterial growth which was expressed by changing growth properties. E. hirae was able to grow only at <1:200 dilutions of Ag nanoparticles while E. coli grew even at 1:10 dilution. At the same time Ag nanoparticles directly affected membranes, as the FOF1-ATPase activity and H(+)-coupled transport was changed either (E. coli were less susceptible to nanoparticles compared to E. hirae). Ag nanoparticles increased H(+) and K(+) transport even in the presence of N,N'-dicyclohexylcarbodiimide (DCCD), inhibitor of FOF1. The stoichiometry of DCCD-inhibited ion fluxes was disturbed. CONCLUSIONS These results point out to distinguishing antibacterial effects of Ag nanoparticles on different bacteria; the difference between effects can be explained by peculiarities in bacterial membrane structure and properties. H(+)-K(+)-exchange disturbance by Ag nanoparticles might be involved in antibacterial effects on E. hirae. The role of FOF1 in antibacterial action of Ag nanoparticles was shown using atpD mutant lacked β subunit in F1.
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Affiliation(s)
- Zaruhi Vardanyan
- Research Institute of Biology, Faculty of Biology, Yerevan State University, 1 A. Manoukian Str., 0025, Yerevan, Armenia.
| | - Vladimir Gevorkyan
- Department of Materials Technology and Structures of Electronic Technique, Institute of Mathematics and High Technologies, Russian-Armenian (Slavonic) University, 123 H. Emin Str., 0051, Yerevan, Armenia.
| | - Michail Ananyan
- "Nano-industry" Concern, 4 Bardin Str., 1 bulk, 119334, Moscow, Russia.
| | - Hrachik Vardapetyan
- Department of Medicinal Biochemistry and Biotechnology, Institute of Mathematics and High Technologies, Russian-Armenian (Slavonic) University, 123 H. Emin Str., 0051, Yerevan, Armenia.
| | - Armen Trchounian
- Research Institute of Biology, Faculty of Biology, Yerevan State University, 1 A. Manoukian Str., 0025, Yerevan, Armenia.
- Department of Medicinal Biochemistry and Biotechnology, Institute of Mathematics and High Technologies, Russian-Armenian (Slavonic) University, 123 H. Emin Str., 0051, Yerevan, Armenia.
- Department of Microbiology, Microbes and Plants Biotechnology, Faculty of Biology, Yerevan State University, 1 A. Manoukian Str., 0025, Yerevan, Armenia.
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The Enhanced Effects of Antibiotics Irradiated of Extremely High Frequency Electromagnetic Field on Escherichia coli Growth Properties. Cell Biochem Biophys 2014; 71:419-24. [DOI: 10.1007/s12013-014-0215-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Comparable effects of low-intensity electromagnetic irradiation at the frequency of 51.8 and 53 GHz and antibiotic ceftazidime on Lactobacillus acidophilus growth and survival. Cell Biochem Biophys 2014; 67:829-35. [PMID: 23516095 DOI: 10.1007/s12013-013-9571-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The effects of low-intensity electromagnetic irradiation (EMI) with the frequencies of 51.8 and 53 GHz on Lactobacillus acidophilus growth and survival were revealed. These effects were compared with antibacterial effects of antibiotic ceftazidime. Decrease in bacterial growth rate by EMI was comparable with the inhibitory effect of ceftazidime (minimal inhibitory concentration-16 μM) and no enhanced action was observed with combined effects of EMI and the antibiotic. However, EMI-enhanced antibiotic inhibitory effect on bacterial survival. The kinetics of the bacterial suspension oxidation-reduction potential up to 24 h of the growth was changed by EMI and ceftazidime. The changes were more strongly expressed by combined effects of EMI and antibiotic especially up to 12 h. Moreover, EMI did not change overall energy (glucose)-dependent H(+) efflux across the membrane but it increased N,N'-dicyclohexylcarbodiimide (DCCD)-inhibited H(+) efflux. In contrast, this EMI in combination with ceftazidime decreased DCCD-sensitive H(+) efflux. Low-intensity EMI had inhibitory effect on L. acidophilus bacterial growth and survival. The effect on bacterial survival was more significant in the combination with ceftazidime. The H(+)-translocating F 0 F 1-ATPase, for which DCCD is specific inhibitor, might be a target for EMI and ceftazidime. The revealed bactericide effects on L. acidophilus can be applied in biotechnology, food producing and safety technology.
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Zhang J, Neoh KG, Hu X, Kang ET. Mechanistic insights into response of Staphylococcus aureus to bioelectric effect on polypyrrole/chitosan film. Biomaterials 2014; 35:7690-8. [PMID: 24934644 DOI: 10.1016/j.biomaterials.2014.05.069] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 05/23/2014] [Indexed: 02/07/2023]
Abstract
Treatment of biofilm-related infections in orthopedics remains a serious clinical challenge. It is known that an electric current can significantly enhance the potency of some antibiotics against biofilms (bioelectric effect) but the uncertainty of the mechanisms and the electrolytic cell-like system used in previous studies limit its applications. Herein, the behavior of Staphylococcus aureus (S. aureus) on an electrically conductive polypyrrole/chitosan film upon passage of a direct current (DC) through the film was investigated in the absence and presence of gentamicin. The killing efficacy of the bacteria within the biofilm by gentamicin was greatly enhanced by the DC treatment. From an analysis of the gene expression by the biofilm bacteria after treatment with gentamicin, DC and their combination, it is postulated that the promotion of bacterial autolysis by DC treatment is responsible for the enhanced susceptibility of biofilm S. aureus to gentamicin. This postulate is supported by an increase in the amount of extracellular deoxyribonucleic acid and adenosine triphosphate, and the appearance of disrupted bacterial cells in the biofilm after DC treatment. These findings provide a new insight into the interaction between DC and bacteria, and offer potential benefits for the treatment of infections in orthopedics.
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Affiliation(s)
- Jieyu Zhang
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Kent Ridge 117576, Singapore
| | - Koon Gee Neoh
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Kent Ridge 117576, Singapore; Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge 117576, Singapore.
| | - Xuefeng Hu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge 117576, Singapore
| | - En-Tang Kang
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Kent Ridge 117576, Singapore; Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge 117576, Singapore
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Gherardini L, Ciuti G, Tognarelli S, Cinti C. Searching for the perfect wave: the effect of radiofrequency electromagnetic fields on cells. Int J Mol Sci 2014; 15:5366-87. [PMID: 24681584 PMCID: PMC4013569 DOI: 10.3390/ijms15045366] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 01/17/2014] [Accepted: 03/20/2014] [Indexed: 12/23/2022] Open
Abstract
There is a growing concern in the population about the effects that environmental exposure to any source of “uncontrolled” radiation may have on public health. Anxiety arises from the controversial knowledge about the effect of electromagnetic field (EMF) exposure to cells and organisms but most of all concerning the possible causal relation to human diseases. Here we reviewed those in vitro and in vivo and epidemiological works that gave a new insight about the effect of radio frequency (RF) exposure, relating to intracellular molecular pathways that lead to biological and functional outcomes. It appears that a thorough application of standardized protocols is the key to reliable data acquisition and interpretation that could contribute a clearer picture for scientists and lay public. Moreover, specific tuning of experimental and clinical RF exposure might lead to beneficial health effects.
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Affiliation(s)
- Lisa Gherardini
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche Siena, Strada Petriccio e Belriguardo, Siena 53100, Italy.
| | - Gastone Ciuti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, Pisa 56025, Italy.
| | - Selene Tognarelli
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, Pisa 56025, Italy.
| | - Caterina Cinti
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche Siena, Strada Petriccio e Belriguardo, Siena 53100, Italy.
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