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Liu L, Huang B, Lu Y, Zhao Y, Tang X, Shi Y. Interactions between electromagnetic radiation and biological systems. iScience 2024; 27:109201. [PMID: 38433903 PMCID: PMC10906530 DOI: 10.1016/j.isci.2024.109201] [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] [Indexed: 03/05/2024] Open
Abstract
Even though the bioeffects of electromagnetic radiation (EMR) have been extensively investigated during the past several decades, our understandings of the bioeffects of EMR and the mechanisms of the interactions between the biological systems and the EMRs are still far from satisfactory. In this article, we introduce and summarize the consensus, controversy, limitations, and unsolved issues. The published works have investigated the EMR effects on different biological systems including humans, animals, cells, and biochemical reactions. Alternative methodologies also include dielectric spectroscopy, detection of bioelectromagnetic emissions, and theoretical predictions. In many studies, the thermal effects of the EMR are not properly controlled or considered. The frequency of the EMR investigated is limited to the commonly used bands, particularly the frequencies of the power line and the wireless communications; far fewer studies were performed for other EMR frequencies. In addition, the bioeffects of the complex EM environment were rarely discussed. In summary, our understanding of the bioeffects of the EMR is quite restrictive and further investigations are needed to answer the unsolved questions.
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Affiliation(s)
- Lingyu Liu
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Bing Huang
- Brain Function and Disease Laboratory, Department of Pharmacology, Shantou University Medical College, 22 Xin-Ling Road, Shantou 515041, China
| | - Yingxian Lu
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Yanyu Zhao
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Xiaping Tang
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Yigong Shi
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
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Voinova VV, Zhuikov VA, Zhuikova YV, Sorokina AA, Makhina TK, Bonartseva GA, Parshina EY, Hossain MA, Shaitan KV, Pryadko AS, Chernozem RV, Mukhortova YR, Shlapakova LE, Surmenev RA, Surmeneva MA, Bonartsev AP. Adhesion of Escherichia coli and Lactobacillus fermentum to Films and Electrospun Fibrous Scaffolds from Composites of Poly(3-hydroxybutyrate) with Magnetic Nanoparticles in a Low-Frequency Magnetic Field. Int J Mol Sci 2023; 25:208. [PMID: 38203380 PMCID: PMC10778586 DOI: 10.3390/ijms25010208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/06/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
The ability of materials to adhere bacteria on their surface is one of the most important aspects of their development and application in bioengineering. In this work, the effect of the properties of films and electrospun scaffolds made of composite materials based on biosynthetic poly(3-hydroxybutyrate) (PHB) with the addition of magnetite nanoparticles (MNP) and their complex with graphene oxide (MNP/GO) on the adhesion of E. coli and L. fermentum under the influence of a low-frequency magnetic field and without it was investigated. The physicochemical properties (crystallinity; surface hydrophilicity) of the materials were investigated by X-ray structural analysis, differential scanning calorimetry and "drop deposition" methods, and their surface topography was studied by scanning electron and atomic force microscopy. Crystal violet staining made it possible to reveal differences in the surface charge value and to study the adhesion of bacteria to it. It was shown that the differences in physicochemical properties of materials and the manifestation of magnetoactive properties of materials have a multidirectional effect on the adhesion of model microorganisms. Compared to pure PHB, the adhesion of E. coli to PHB-MNP/GO, and for L. fermentum to both composite materials, was higher. In the magnetic field, the adhesion of E. coli increased markedly compared to PHB-MNP/GO, whereas the effect on the adhesion of L. fermentum was reversed and was only evident in samples with PHB-MNP. Thus, the resultant factors enhancing and impairing the substrate binding of Gram-negative E. coli and Gram-positive L. fermentum turned out to be multidirectional, as they probably have different sensitivity to them. The results obtained will allow for the development of materials with externally controlled adhesion of bacteria to them for biotechnology and medicine.
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Affiliation(s)
- Vera V. Voinova
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (V.V.V.); (A.A.S.); (E.Y.P.); (M.A.H.); (K.V.S.)
| | - Vsevolod A. Zhuikov
- The Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Moscow 119071, Russia; (V.A.Z.); (Y.V.Z.); (T.K.M.); (G.A.B.)
| | - Yulia V. Zhuikova
- The Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Moscow 119071, Russia; (V.A.Z.); (Y.V.Z.); (T.K.M.); (G.A.B.)
| | - Anastasia A. Sorokina
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (V.V.V.); (A.A.S.); (E.Y.P.); (M.A.H.); (K.V.S.)
| | - Tatiana K. Makhina
- The Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Moscow 119071, Russia; (V.A.Z.); (Y.V.Z.); (T.K.M.); (G.A.B.)
| | - Garina A. Bonartseva
- The Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Moscow 119071, Russia; (V.A.Z.); (Y.V.Z.); (T.K.M.); (G.A.B.)
| | - Evgeniia Yu. Parshina
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (V.V.V.); (A.A.S.); (E.Y.P.); (M.A.H.); (K.V.S.)
| | - Muhammad Asif Hossain
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (V.V.V.); (A.A.S.); (E.Y.P.); (M.A.H.); (K.V.S.)
| | - Konstantin V. Shaitan
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (V.V.V.); (A.A.S.); (E.Y.P.); (M.A.H.); (K.V.S.)
| | - Artyom S. Pryadko
- Physical Materials Science and Composite Materials Center, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia; (A.S.P.); (Y.R.M.); (L.E.S.); (R.A.S.); (M.A.S.)
| | - Roman V. Chernozem
- International Research and Development Center “Piezo- and Magnetoelectric Materials”, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia;
| | - Yulia R. Mukhortova
- Physical Materials Science and Composite Materials Center, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia; (A.S.P.); (Y.R.M.); (L.E.S.); (R.A.S.); (M.A.S.)
- International Research and Development Center “Piezo- and Magnetoelectric Materials”, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia;
| | - Lada E. Shlapakova
- Physical Materials Science and Composite Materials Center, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia; (A.S.P.); (Y.R.M.); (L.E.S.); (R.A.S.); (M.A.S.)
| | - Roman A. Surmenev
- Physical Materials Science and Composite Materials Center, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia; (A.S.P.); (Y.R.M.); (L.E.S.); (R.A.S.); (M.A.S.)
- International Research and Development Center “Piezo- and Magnetoelectric Materials”, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia;
| | - Maria A. Surmeneva
- Physical Materials Science and Composite Materials Center, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia; (A.S.P.); (Y.R.M.); (L.E.S.); (R.A.S.); (M.A.S.)
- International Research and Development Center “Piezo- and Magnetoelectric Materials”, Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Tomsk 634050, Russia;
| | - Anton P. Bonartsev
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (V.V.V.); (A.A.S.); (E.Y.P.); (M.A.H.); (K.V.S.)
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Di Lodovico S, Petrini M, D'Amico E, Di Fermo P, Diban F, D'Arcangelo S, Piattelli A, Cellini L, Iezzi G, Di Giulio M, D'Ercole S. Complex magnetic fields represent an eco-sustainable technology to counteract the resistant Candida albicans growth without affecting the human gingival fibroblasts. Sci Rep 2023; 13:22067. [PMID: 38086849 PMCID: PMC10716184 DOI: 10.1038/s41598-023-49323-7] [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: 08/02/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023] Open
Abstract
Novel technologies such as complex magnetic fields-CMFs represent an eco-sustainable proposal to counteract the infection associated to resistant microorganisms. The aim of this study was to evaluate the effect of two CMF programs (STRESS, ANTIBACTERIAL) against clinical antifungal resistant C. albicans also evaluating their uneffectiveness on gingival fibroblasts (hGFs). The STRESS program was more efficacious on C. albicans biofilm with up to 64.37% ± 10.80 of biomass and up to 99.19% ± 0.06 CFU/ml reductions in respect to the control also inducing an alteration of lipidic structure of the membrane. The MTT assay showed no CMFs negative effects on the viability of hGFs with a major ROS production with the ANTIBACTERIAL program at 3 and 24 h. For the wound healing assay, STRESS program showed the best effect in terms of the rate migration at 24 h, showing statistical significance of p < 0.0001. The toluidine-blue staining observations showed the typical morphology of cells and the presence of elongated and spindle-shaped with cytoplasmic extensions and lamellipodia was observed by SEM. The ANTIBACTERIAL program statistically increased the production of collagen with respect to control and STRESS program (p < 0.0001). CMFs showed a relevant anti-virulence action against C. albicans, no cytotoxicity effects and a high hGFs migration rate. The results of this study suggest that CMFs could represent a novel eco-sustainable strategy to counteract the resistant yeast biofilm infections.
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Affiliation(s)
- Silvia Di Lodovico
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Morena Petrini
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Emira D'Amico
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Paola Di Fermo
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Firas Diban
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Sara D'Arcangelo
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Adriano Piattelli
- School of Dentistry, Saint Camillus International, University of Health and Medical Sciences, Via di Sant'Alessandro 8, 00131, Rome, Italy
- Facultad de Medicina, UCAM Universidad Catolica San Antonio de Murcia, 30107, Murcia, Spain
| | - Luigina Cellini
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Giovanna Iezzi
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Mara Di Giulio
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - Simonetta D'Ercole
- Department of Medical Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy.
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Aoyama N, Kanematsu H, Barry DM, Miura H, Ogawa A, Kogo T, Kawai R, Hagio T, Hirai N, Kato T, Yoshitake M, Ichino R. AC Electromagnetic Field Controls the Biofilms on the Glass Surface by Escherichia coli & Staphylococcus epidermidis Inhibition Effect. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7051. [PMID: 37959648 PMCID: PMC10649311 DOI: 10.3390/ma16217051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 11/15/2023]
Abstract
Biofilms, mainly comprised of bacteria, form on materials' surfaces due to bacterial activity. They are generally composed of water, extracellular polymeric substances (polysaccharides, proteins, nucleic acids, and lipids), and bacteria. Some bacteria that form biofilms cause periodontal disease, corrosion of the metal materials that make up drains, and slippage. Inside of a biofilm is an environment conducive to the growth and propagation of bacteria. Problems with biofilms include the inability of disinfectants and antibiotics to act on them. Therefore, we have investigated the potential application of alternating electromagnetic fields for biofilm control. We obtained exciting results using various materials' specimens and frequency conditions. Through these studies, we gradually understood that the combination of the type of bacteria, the kind of material, and the application of an electromagnetic field with various low frequencies (4 kHz-12 kHz) changes the circumstances of the onset of the biofilm suppression effect. In this study, relatively high frequencies (20 and 30 kHz) were applied to biofilms caused by Escherichia coli (E. coli) and Staphylococcus epidermidis (S. epidermidis), and quantitative evaluation was performed using staining methods. The sample surfaces were analyzed by Raman spectroscopy using a Laser Raman spectrometer to confirm the presence of biofilms on the surface.
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Affiliation(s)
- Natsu Aoyama
- Department of Materials Science and Engineering, National Institute of Technology (KOSEN), Suzuka College, (Currently Asahi Kasei Co.), Suzuka 510-0294, Japan; (N.A.); (T.K.); (R.K.)
| | - Hideyuki Kanematsu
- Research Collaboration Promotion Center, National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan
| | - Dana M. Barry
- Department of Electrical and Computer Engineering, Clarkson University, Potsdam, NY 13699, USA;
| | - Hidekazu Miura
- Faculty of Medical Engineering, Suzuka University of Medical Science, Suzuka 510-0293, Japan;
| | - Akiko Ogawa
- Department of Chemistry and Biochemistry, National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (A.O.); (N.H.)
| | - Takeshi Kogo
- Department of Materials Science and Engineering, National Institute of Technology (KOSEN), Suzuka College, (Currently Asahi Kasei Co.), Suzuka 510-0294, Japan; (N.A.); (T.K.); (R.K.)
| | - Risa Kawai
- Department of Materials Science and Engineering, National Institute of Technology (KOSEN), Suzuka College, (Currently Asahi Kasei Co.), Suzuka 510-0294, Japan; (N.A.); (T.K.); (R.K.)
| | - Takeshi Hagio
- Institutes of Innovation for Future Society, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan;
| | - Nobumitsu Hirai
- Department of Chemistry and Biochemistry, National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (A.O.); (N.H.)
| | - Takehito Kato
- National Institute of Technology (KOSEN), Oyama College, Oyama 323-0806, Japan;
| | - Michiko Yoshitake
- National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan;
| | - Ryoichi Ichino
- Graduate School of Engineering Chemical Systems Engineering 2, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan;
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Sztafrowski D, Muraszko J, Jasiura A, Bryk P, Urbanek AK, Krasowska A. The alternating 50 Hz magnetic field depending on the hydrophobicity of the strain affects the viability, filamentation and sensitivity to drugs of Candida albicans. PLoS One 2023; 18:e0291438. [PMID: 37796949 PMCID: PMC10553255 DOI: 10.1371/journal.pone.0291438] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 08/26/2023] [Indexed: 10/07/2023] Open
Abstract
In recent decades, Candida albicans have been the main etiological agent of life-threatening invasive infections, characterized by various mechanisms of resistance to commonly used antifungals. One of the strategies to fight Candida infections may be the use of an electromagnetic field. In this study, we examined the influence of the alternating magnetic field of 50 Hz on the cells of C. albicans. We checked the impact of the alternating magnetic field of 50 Hz on the viability, filamentation and sensitivity to fluconazole and amphotericin B of two, differing in hydrophobicity, strains of C. albicans, CAF2-1 and CAF 4-2. Our results indicate that using the alternating magnetic field of 50 Hz reduces the growth of C. albicans. Interestingly, it presents a stronger effect on the hydrophobic strain CAF4-2 than on the hydrophilic CAF2-1. The applied electromagnetic field also affects the permeabilization of the cell membrane. However, it does not inhibit the transformation from yeast to hyphal forms. AMF is more effective in combination with fluconazole rather than amphotericin B. Our findings confirm the hypothesis that the application of the alternating magnetic field of 50 Hz in antifungal therapy may arise as a new option to support the treatment of Candida infections.
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Affiliation(s)
- Dariusz Sztafrowski
- Faculty of Electrical Engineering, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Jakub Muraszko
- Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Adam Jasiura
- Faculty of Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Patrycja Bryk
- Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Aneta K. Urbanek
- Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Anna Krasowska
- Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
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Hou C, Yin F, Wang S, Zhao A, Li Y, Liu Y. Helicobacter pylori Biofilm-Related Drug Resistance and New Developments in Its Anti-Biofilm Agents. Infect Drug Resist 2022; 15:1561-1571. [PMID: 35411160 PMCID: PMC8994595 DOI: 10.2147/idr.s357473] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/05/2022] [Indexed: 12/16/2022] Open
Abstract
Helicobacter pylori is one of the most common pathogenic bacterium worldwide, infecting about 50% of the world’s population. It is a major cause of several upper gastrointestinal diseases, including peptic ulcers and gastric cancer. The emergence of H. pylori resistance to antibiotics has been a major clinical challenge in the field of gastroenterology. In the course of H. pylori infection, some bacteria invade the gastric epithelium and are encapsulated into a self-produced matrix to form biofilms that protect the bacteria from external threats. Bacteria with biofilm structures can be up to 1000 times more resistant to antibiotics than planktonic bacteria. This implies that targeting biofilms might be an effective strategy to alleviate H. pylori drug resistance. Therefore, it is important to develop drugs that can eliminate or disperse biofilms. In recent years, anti-biofilm agents have been investigated as alternative or complementary therapies to antibiotics to reduce the rate of drug resistance. This article discusses the formation of H. pylori biofilms, the relationship between biofilms and drug resistance in H. pylori, and the recent developments in the research of anti-biofilm agents targeting H. pylori drug resistance.
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Affiliation(s)
- Chong Hou
- Department of Gastroenterology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, 264100, People’s Republic of China
| | - Fangxu Yin
- Department of Thyroid and Breast Surgery, Binzhou Medical University Hospital, Binzhou, Shandong, 256603, People’s Republic of China
| | - Song Wang
- Department of Thyroid and Breast Surgery, Binzhou Medical University Hospital, Binzhou, Shandong, 256603, People’s Republic of China
| | - Ailing Zhao
- Department of Gastroenterology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, 264100, People’s Republic of China
| | - Yingzi Li
- Department of Gastroenterology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, 264100, People’s Republic of China
| | - Yipin Liu
- Department of Gastroenterology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, 264100, People’s Republic of China
- Correspondence: Yipin Liu, Department of Gastroenterology, Yantai Affiliated Hospital of Binzhou Medical University, No. 717 Jinbu Street, Muping District, Yantai, Shandong, 264100, People’s Republic of China, Tel +86-18953595711, Email
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D’Ercole S, Di Lodovico S, Iezzi G, Pierfelice TV, D’Amico E, Cipollina A, Piattelli A, Cellini L, Petrini M. Complex Electromagnetic Fields Reduce Candida albicans Planktonic Growth and Its Adhesion to Titanium Surfaces. Biomedicines 2021; 9:biomedicines9091261. [PMID: 34572449 PMCID: PMC8466218 DOI: 10.3390/biomedicines9091261] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 12/29/2022] Open
Abstract
This study evaluates the effects of different programs of complex electromagnetic fields (C.M.F.s) on Candida albicans, in planktonic and sessile phase and on human gingival fibroblasts (HGF cells). In vitro cultures of C. albicans ATCC 10231 and HGF cells were exposed to different cycles of C.M.F.s defined as: oxidative stress, oxidative stress/antibacterial, antibacterial, antibacterial/oxidative stress. Colony forming units (CFUs), metabolic activity, cells viability (live/dead), cell morphology, filamentation analysis, and cytotoxicity assay were performed. The broth cultures, exposed to the different C.M.F.s, were grown on titanium discs for 48 h. The quantity comparisons of adhered C. albicans on surfaces were determined by CFUs and scanning electron microscopy. The C. albicans growth could be readily controlled with C.M.F.s reducing the number of cultivable planktonic cells vs. controls, independently by the treatment applied. In particular, the antibacterial program was associated with lower levels of CFUs. The quantification of the metabolic activity was significantly lower by using the oxidative stress program. Live/dead images showed that C.M.F.s significantly decreased the viability of C. albicans. C.M.F.s inhibited C. albicans virulence traits reducing hyphal morphogenesis, adhesion, and biofilm formation on titanium discs. The MTS assay showed no negative effects on the viability of HGF. Independent of the adopted protocol, C.M.F.s exert antifungal and anti-virulence action against C. albicans, no cytotoxicity effects on HGF and can be useful in the prevention and treatment of yeast biofilm infections.
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Affiliation(s)
- Simonetta D’Ercole
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (G.I.); (T.V.P.); (E.D.); (A.P.); (M.P.)
- Correspondence:
| | - Silvia Di Lodovico
- Department of Pharmacy, University “G. d’Annunzio” Chieti-Pescara, 66013 Chieti, Italy; (S.D.L.); (L.C.)
| | - Giovanna Iezzi
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (G.I.); (T.V.P.); (E.D.); (A.P.); (M.P.)
| | - Tania Vanessa Pierfelice
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (G.I.); (T.V.P.); (E.D.); (A.P.); (M.P.)
| | - Emira D’Amico
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (G.I.); (T.V.P.); (E.D.); (A.P.); (M.P.)
| | | | - Adriano Piattelli
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (G.I.); (T.V.P.); (E.D.); (A.P.); (M.P.)
- Faculty of Medicine and Odontology, University of Valencia, 46004 Valencia, Spain
- Biomaterial Engineering, Catholic University of San Antonio de Murcia (UCAM), Av. de los Jerónimos, 135, 30107 Murcia, Spain
- Villa Serena Foundation for Research, Via Leonardo Petruzzi 42, 65013 Città Sant’Angelo, Italy
- Casa di Cura Villa Serena del Dott. L. Petruzzi, Via Leonardo Petruzzi 42, 65013 Città Sant’Angelo, Italy
| | - Luigina Cellini
- Department of Pharmacy, University “G. d’Annunzio” Chieti-Pescara, 66013 Chieti, Italy; (S.D.L.); (L.C.)
| | - Morena Petrini
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (G.I.); (T.V.P.); (E.D.); (A.P.); (M.P.)
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Xiao Y, Seo Y, Lin Y, Li L, Muhammad T, Ma C, Li Y. Electromagnetic fields for biofouling mitigation in reclaimed water distribution systems. WATER RESEARCH 2020; 173:115562. [PMID: 32044595 DOI: 10.1016/j.watres.2020.115562] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/21/2020] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
Biofouling is ubiquitous in reclaimed water distribution systems and causes various industrial, economic, and health issues. This paper investigated the anti-biofouling efficacy of electromagnetic fields (EMFs) for agricultural emitters used for two types of reclaimed water. 16S rRNA gene sequencing and X-ray diffraction were applied to determine the microbial communities and mineral compositions in biofilms. The obtained results revealed that EMF treatment significantly changed the bacterial communities and reduced their diversities in biofilm by affecting water quality parameters. Network analysis results indicated that EMFs were detrimental to the co-occurrence patterns of mutualistic relationships among bacterial species, destroyed the connectivity and complexity of the networks, and inhibited biofilm formation [decreased total biomass and extracellular polymeric substance (EPS) content]. EMF treatment could also decrease the deposition of mineral precipitates, reducing the carbonate and silicate content in biofilm. The decrease of EPS content appeared to reduce biofilm-induced mineral crystallization, while the ion precipitations accelerated by EMFs caused an erosive effect on biofilm. The results demonstrated that EMF treatment is an effective, chemical-free, and anti-biofouling treatment method with great potential for biofouling control in reclaimed water distribution systems.
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Affiliation(s)
- Yang Xiao
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Youngwoo Seo
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA; Department of Chemical Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA
| | - Yufei Lin
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Lei Li
- Department of Civil and Environmental Engineering, University of Toledo, Mail Stop 307, 3048, Nitschke Hall, Toledo, OH, USA
| | - Tahir Muhammad
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Changjian Ma
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China
| | - Yunkai Li
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China.
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9
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Said-Salman IH, Jebaii FA, Yusef HH, Moustafa ME. Global gene expression analysis of Escherichia coli K-12 DH5α after exposure to 2.4 GHz wireless fidelity radiation. Sci Rep 2019; 9:14425. [PMID: 31595026 PMCID: PMC6783421 DOI: 10.1038/s41598-019-51046-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 09/23/2019] [Indexed: 11/09/2022] Open
Abstract
This study investigated the non-thermal effects of Wi-Fi radiofrequency radiation of 2.4 GHz on global gene expression in Escherichia coli K-12 DH5α. High-throughput RNA-sequencing of 2.4 GHz exposed and non-exposed bacteria revealed that 101 genes were differentially expressed (DEGs) at P ≤ 0.05. The up-regulated genes were 52 while the down-regulated ones were 49. QRT-PCR analysis of pgaD, fliC, cheY, malP, malZ, motB, alsC, alsK, appB and appX confirmed the RNA-seq results. About 7% of DEGs are involved in cellular component organization, 6% in response to stress stimulus, 6% in biological regulation, 6% in localization, 5% in locomotion and 3% in cell adhesion. Database for annotation, visualization and integrated discovery (DAVID) functional clustering revealed that DEGs with high enrichment score included genes for localization of cell, locomotion, chemotaxis, response to external stimulus and cell adhesion. Kyoto encyclopedia of genes and genomes (KEGG) pathways analysis showed that the pathways for flagellar assembly, chemotaxis and two-component system were affected. Go enrichment analysis indicated that the up-regulated DEGs are involved in metabolic pathways, transposition, response to stimuli, motility, chemotaxis and cell adhesion. The down-regulated DEGs are associated with metabolic pathways and localization of ions and organic molecules. Therefore, the exposure of E. coli DH5α to Wi-Fi radiofrequency radiation for 5 hours influenced several bacterial cellular and metabolic processes.
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Affiliation(s)
- Ilham H Said-Salman
- Department of Biological Sciences, Faculty of Science, Beirut Arab University, Beirut, Lebanon.
- Department of Biochemistry, Faculty of Science, Lebanese University, Beirut, Lebanon.
| | - Fatima A Jebaii
- Department of Biochemistry, Faculty of Science, Lebanese University, Beirut, Lebanon
| | - Hoda H Yusef
- Department of Biological Sciences, Faculty of Science, Beirut Arab University, Beirut, Lebanon
| | - Mohamed E Moustafa
- Department of Biochemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
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10
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Mateus-Vargas RH, Kemper N, Volkmann N, Kietzmann M, Meissner J, Schulz J. Low-frequency electromagnetic fields as an alternative to sanitize water of drinking systems in poultry production? PLoS One 2019; 14:e0220302. [PMID: 31344112 PMCID: PMC6657887 DOI: 10.1371/journal.pone.0220302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 07/13/2019] [Indexed: 11/19/2022] Open
Abstract
Low-frequency electromagnetic fields (LF-EMF) may present an alternative to conventional sanitation methods of water supply lines in animal production. The objective of this study was to evaluate the effect of the application of LF-EMF on bacterial concentrations and biofilms at scale-models of different drinking systems (circulating and non-circulating) conventionally used in poultry holdings. Treated systems were equipped with commercial devices producing pulsed electromagnetic signals of low frequency up to 10,000 Hz; max. 21 mT. Exposure of water to LF-EMF resulted in changes of the culturable bacterial counts, although with high standard deviations. Differing between systems types, LF-EMF treatment seemed to be responsible either for a limitation or for an increase of colony forming unit counts, with partly statistically significant differences, especially in early stages of treatment. In contrast, neither biofilm formation nor counts of cells suspended in water differed between treated and control lines over 28 days of experiment, as determined by fluorescence microscopy. Although this study indicates that LF-EMF may influence culturability of water microorganisms, no clear inhibitory effects on bacterial biofilm formation or on planktonic microbes by LF-EMF treatment were confirmed in the experiments.
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Affiliation(s)
- Rafael H. Mateus-Vargas
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behavior, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm, Hannover, Germany
- * E-mail:
| | - Nicole Kemper
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behavior, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm, Hannover, Germany
| | - Nina Volkmann
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behavior, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm, Hannover, Germany
| | - Manfred Kietzmann
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Buenteweg, Hannover, Germany
| | - Jessica Meissner
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Buenteweg, Hannover, Germany
| | - Jochen Schulz
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behavior, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm, Hannover, Germany
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11
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Chen X, Li P, Shen Y, Zou Y, Yuan G, Hu H. Rhamnolipid-involved antibiotics combinations improve the eradication of Helicobacter pylori biofilm in vitro: A comparison with conventional triple therapy. Microb Pathog 2019; 131:112-119. [DOI: 10.1016/j.micpath.2019.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 03/29/2019] [Accepted: 04/01/2019] [Indexed: 02/07/2023]
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12
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Gosselin F, Mathieu L, Block JC, Carteret C, Muhr H, Jorand FPA. Assessment of an anti-scale low-frequency electromagnetic field device on drinking water biofilms. BIOFOULING 2018; 34:1020-1031. [PMID: 30612474 DOI: 10.1080/08927014.2018.1532998] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 10/01/2018] [Accepted: 10/02/2018] [Indexed: 06/09/2023]
Abstract
Low intensity and very low-frequency electromagnetic fields (EMF) used for preventing scaling in water distribution systems were tested for the first time for their potential impact on drinking water biofilms. The assays were carried out in laboratory-scale flow-through reactors that mimic water distribution systems. The drinking water biofilms were not directly exposed to the core of the EMF generator and only subjected to waterborne electromagnetic waves. The density and chlorine susceptibility of nascent or mature biofilms grown under exposure to EMF were evaluated in soft and hard water. This EMF treatment was able to modify CaCO3 crystallization but it did not significantly affect biofilms. Indeed, over all the tested conditions, there was no significant change in cell number, or in the integrity of the cells (membrane, culturability), and no measurable effect of chlorine on the biofilm.
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Affiliation(s)
- F Gosselin
- a CNRS, LCPME , Université de Lorraine , Nancy , France
| | - L Mathieu
- b LCPME , EPHE, PSL Research University , Nancy , France
| | - J-C Block
- a CNRS, LCPME , Université de Lorraine , Nancy , France
| | - C Carteret
- a CNRS, LCPME , Université de Lorraine , Nancy , France
| | - H Muhr
- c CNRS, LRGP , Université de Lorraine , Nancy , France
| | - F P A Jorand
- a CNRS, LCPME , Université de Lorraine , Nancy , France
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13
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Poursina F, Fagri J, Mirzaei N, Safaei HG. Overexpression of spoT gene in coccoid forms of clinical Helicobacter pylori isolates. Folia Microbiol (Praha) 2018; 63:459-465. [PMID: 29327293 DOI: 10.1007/s12223-017-0557-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 10/05/2017] [Indexed: 12/31/2022]
Abstract
Helicobacter pylori (H. pylori) can convert to coccoid form in unfavorable conditions or as a result of antibiotic treatment. In order to adapt to harsh environments, H. pylori requires a stringent response which, encoded by the spoT gene, has a bifunctional enzyme possessing both (p)ppGpp synthetic and degrading activity. Our goal in this study was to compare spoT gene expression in spiral and induced coccoid forms of H. pylori with use of amoxicillin. First, clinical isolate coccoid forms were induced with amoxicillin; then, the viability test was analyzed by flow cytometer. After RNA extraction, cDNA synthesis and designing a specific primer for spoT gene, evaluation of the desired gene expression in both forms were studied. Bacterial isolates exposed to amoxicillin at MIC and 1/2 MIC induced morphological conversion better and faster than other MIC concentration. The expression of spoT gene was significantly downregulated in spiral forms of H. pylori, while the gene expression was upregulated and + 30.3-fold changes was seen in coccoid forms of bacterium. To summarize, spoT gene is one of the key factors for antibiotic resistance and its enhanced expression in coccoid form can be a valuable diagnostic marker for recognition of H. pylori during morphological conversion.
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Affiliation(s)
- Farkhondeh Poursina
- Department of Microbiology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jamshid Fagri
- Department of Microbiology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nasrin Mirzaei
- Department of Microbiology, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran
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14
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Crabtree DPE, Herrera BJ, Kang S. The response of human bacteria to static magnetic field and radiofrequency electromagnetic field. J Microbiol 2017; 55:809-815. [DOI: 10.1007/s12275-017-7208-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 08/18/2017] [Accepted: 08/21/2017] [Indexed: 12/27/2022]
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15
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Influence of static magnetic field exposure on fatty acid composition in Salmonella Hadar. Microb Pathog 2017; 108:13-20. [PMID: 28455137 DOI: 10.1016/j.micpath.2017.04.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 04/23/2017] [Accepted: 04/24/2017] [Indexed: 11/20/2022]
Abstract
We have been interested, in this work, to investigate the effect of the exposure to static magnetic field at 200 mT (SMF) on the fatty acid (FA) composition of Salmonella enterica subsp Enterica serovar Hadar isolate 287: effects on the proportion of saturated and unsaturated fatty acids (SFAs, UFAs), cyclopropane fatty acids (CFAs) and hydroxy fatty acids after exposure to the static magnetic field at 200 mT (SMF). Analysis with Gas Chromatography-Mass Spectrometry (GC-MS) of total lipid showed that the proportion of the most fatty acids was clearly affected. The comparison of UFAs/SFAs ratio in exposed bacteria and controls showed a diminution after 3 and 6 h of exposure. This ration reached a balance after 9 h of treatment with SMF. So we can conclude that S. Hadar tries to adapt to magnetic stress by changing the proportions of SFAs and UFAs over time to maintain an equilibrium after 9 h of exposure, thus to maintain the inner membranes fluidity. Also, a decrease in the proportion of hydroxy FAs was observed after 6 h but an increase of this proportion after 9 h of exposure. Concerning CFAs, its proportion raised after 6 h of exposure to the SMF but it decreased after 9 h of exposure. These results are strongly correlated with those of cfa (cyclopropane fatty acid synthase) gene expression which showed a decrease of its expression after 9 h of exposure.
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16
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Karaguler T, Kahraman H, Tuter M. Analyzing effects of ELF electromagnetic fields on removing bacterial biofilm. Biocybern Biomed Eng 2017. [DOI: 10.1016/j.bbe.2016.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Cataldi V, Di Bartolomeo S, Di Campli E, Nostro A, Cellini L, Di Giulio M. In vitro activity of Aloe vera inner gel against microorganisms grown in planktonic and sessile phases. Int J Immunopathol Pharmacol 2016; 28:595-602. [PMID: 26526205 DOI: 10.1177/0394632015600594] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The failure of traditional antimicrobial treatments is becoming a worldwide problem. The use of Aloe vera is of particular interest for its role as curative agent and its efficacy in complementary therapies for a variety of illnesses. This study evaluated the antimicrobial activity of A. vera inner gel against a panel of microorganisms, Gram-positive and -negative bacteria, and Candida albicans. In addition to A. vera inner gel being used in the treatment of peptic ulcers, in dermatological treatments, and wound healing, it was also tested on the sessile phase of clinical Helicobacter pylori strains (including multi-drug-resistant strains) and on planktonic and sessile phase of Staphylococcus aureus/Pseudomonas aeruginosa clinical isolates from venous leg ulcers.A. vera inner gel expresses its prevalent activity against Gram-negative bacteria and C. albicans in respect to Gram-positive bacteria. The results of the A. vera antibiofilm activity showed a decrease of the produced biomass in a concentration-dependent-way, in each analyzed microorganism. The data obtained show that A. vera inner gel has both an antimicrobial and antibiofilm activity suggesting its potential use for the treatment of microbial infections, in particular for H. pylori gastric infection, especially in case of multi-drug-resistance, as well as for an effective wound dressing.
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Affiliation(s)
- V Cataldi
- Department of Pharmacy, University "G. d'Annunzio", Chieti-Pescara, Chieti, Italy
| | - S Di Bartolomeo
- Department of Pharmacy, University "G. d'Annunzio", Chieti-Pescara, Chieti, Italy
| | - E Di Campli
- Department of Pharmacy, University "G. d'Annunzio", Chieti-Pescara, Chieti, Italy
| | - A Nostro
- Department of Pharmaceutical Sciences and Health Products, University of Messina, Polo Annunziata, Messina, Italy
| | - L Cellini
- Department of Pharmacy, University "G. d'Annunzio", Chieti-Pescara, Chieti, Italy
| | - M Di Giulio
- Department of Pharmacy, University "G. d'Annunzio", Chieti-Pescara, Chieti, Italy
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18
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Mercier A, Bertaux J, Lesobre J, Gravouil K, Verdon J, Imbert C, Valette E, Héchard Y. Characterization of biofilm formation in natural water subjected to low-frequency electromagnetic fields. BIOFOULING 2016; 32:287-299. [PMID: 26905178 DOI: 10.1080/08927014.2015.1137896] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Electromagnetic field (EMF) treatment has proven to be effective against mineral scaling in water systems. Therefore, it should be assessed for the treatment of other deposits such as biofilms. In this study, a commercial device producing low-frequency EMF (1-10 kHz) was applied to a reactor fed with natural water for 45 days. The treatment promoted the concentration of microorganisms in suspension and limited the amount of sessile microorganisms in the biofilm, as determined by the measurement of total DNA, qPCR and microscopy. The structure of the bacterial community was assessed by t-RFLP and pyrosequencing analysis. The results showed that EMF treatment affected both planktonic and sessile community composition. EMFs were responsible for a shift in classes of Proteobacteria during development of the biofilm. It may be speculated that the EMF treatment affected particle solubility and/or microorganism hydration. This study indicated that EMFs modulated biofilm formation in natural water.
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Affiliation(s)
- Anne Mercier
- a Equipe Microbiologie de l'Eau, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
| | - Joanne Bertaux
- b Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
| | - Jérôme Lesobre
- a Equipe Microbiologie de l'Eau, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
- b Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
| | - Kevin Gravouil
- c Laboratoire coopératif ThanaplastSP-EBI-Carbios Bioplastics, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
| | - Julien Verdon
- a Equipe Microbiologie de l'Eau, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
| | - Christine Imbert
- a Equipe Microbiologie de l'Eau, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
| | - Eric Valette
- d Planet Horizons Technologies , Technopole 5, Sierre , Switzerland
| | - Yann Héchard
- a Equipe Microbiologie de l'Eau, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique UMR 7267 , Université de Poitiers , Poitiers , France
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19
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Gérard M, Noamen O, Evelyne G, Eric V, Gilles C, Marc H. Hydraulic continuity and biological effects of low strength very low frequency electromagnetic waves: Case of microbial biofilm growth in water treatment. WATER RESEARCH 2015; 83:184-194. [PMID: 26150067 DOI: 10.1016/j.watres.2015.06.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 06/06/2015] [Accepted: 06/25/2015] [Indexed: 06/04/2023]
Abstract
This study aims to elucidate the interactions between water, subjected to electromagnetic waves of very low frequency (VLF) (kHz) with low strength electromagnetic fields (3.5 mT inside the coils), and the development of microbial biofilms in this exposed water. Experimental results demonstrate that in water exposed to VLF electromagnetic waves, the biomass of biofilm is limited if hydraulic continuity is achieved between the electromagnetic generator and the biofilm media. The measured amount of the biofilm's biomass is approximately a factor two lower for exposed biofilm than the non-exposed biofilm. Measurements of electromagnetic fields in the air and simulations exhibit very low intensities of fields (<10 nT and 2 V/m) in the biofilm-exposed region at a distance of 1 m from the electromagnetic generator. Exposure to electric and magnetic fields of the quoted intensities cannot explain thermal and ionizing effects on the biofilm. A variable electrical potential with a magnitude close to 20 mV was detected in the tank in hydraulic continuity with the electromagnetic generator. The application of quantum field theory may help to explain the observed effects in this case.
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Affiliation(s)
- Merlin Gérard
- LOCIE UMR CNRS 5271, Université de Savoie, 73376, Le Bourget du Lac, France.
| | - Omri Noamen
- LOCIE UMR CNRS 5271, Université de Savoie, 73376, Le Bourget du Lac, France
| | - Gonze Evelyne
- LOCIE UMR CNRS 5271, Université de Savoie, 73376, Le Bourget du Lac, France
| | - Valette Eric
- Planet Horizons Technologies, Technopole 5, 3960 Sierre, Switzerland
| | - Cauffet Gilles
- Univ. Grenoble Alpes, G2Elab, F-38000 Grenoble, France; CNRS, G2Elab, F-38000 Grenoble, France
| | - Henry Marc
- LCMES UMR CNRS 7140 Université de Stasbourg, 67000 Strasbourg, France
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20
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Baraúna RA, Santos AV, Graças DA, Santos DM, Ghilardi R, Pimenta AMC, Carepo MSP, Schneider MPC, Silva A. Exposure to an extremely low-frequency electromagnetic field only slightly modifies the proteome of Chromobacterium violaceumATCC 12472. Genet Mol Biol 2015; 38:227-30. [PMID: 26273227 PMCID: PMC4530650 DOI: 10.1590/s1415-4757382220140240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 11/30/2014] [Indexed: 11/21/2022] Open
Abstract
Several studies of the physiological responses of different organisms exposed to extremely low-frequency electromagnetic fields (ELF-EMF) have been described. In this work, we report the minimal effects of in situ exposure to ELF-EMF on the global protein expression of Chromobacterium violaceum using a gel-based proteomic approach. The protein expression profile was only slightly altered, with five differentially expressed proteins detected in the exposed cultures; two of these proteins (DNA-binding stress protein, Dps, and alcohol dehydrogenase) were identified by MS/MS. The enhanced expression of Dps possibly helped to prevent physical damage to DNA. Although small, the changes in protein expression observed here were probably beneficial in helping the bacteria to adapt to the stress generated by the electromagnetic field.
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Affiliation(s)
- Rafael A Baraúna
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Agenor V Santos
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Diego A Graças
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Daniel M Santos
- Laboratório de Venenos e Toxinas, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Rubens Ghilardi
- Superintendência do Meio Ambiente, Centrais Elétricas do Norte do Brasil S/A, Brasília, DF, Brazil
| | - Adriano M C Pimenta
- Laboratório de Venenos e Toxinas, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marta S P Carepo
- Rede de Química e Tecnologia, Centro de Química Fina e Biotecnologia, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Maria P C Schneider
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Artur Silva
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
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21
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Percival SL, Suleman L. Biofilms and Helicobacter pylori: Dissemination and persistence within the environment and host. World J Gastrointest Pathophysiol 2014; 5:122-132. [PMID: 25133015 PMCID: PMC4133512 DOI: 10.4291/wjgp.v5.i3.122] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/23/2014] [Accepted: 05/19/2014] [Indexed: 02/06/2023] Open
Abstract
The presence of viable Helicobacter pylori (H. pylori) in the environment is considered to contribute to the levels of H. pylori found in the human population, which also aids to increase its genetic variability and its environmental adaptability and persistence. H. pylori form biofilms both within the in vitro and in vivo environment. This represents an important attribute that assists the survival of this bacterium within environments that are both hostile and adverse to proliferation. It is the aim of this paper to review the ability of H. pylori to form biofilms in vivo and in vitro and to address the inherent mechanisms considered to significantly enhance its persistence within the host and in external environments. Furthermore, the dissemination of H. pylori in the external environment and within the human body and its impact upon infection control will be discussed.
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22
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Bessa LJ, Grande R, Iorio DDI, Giulio MDI, Campli EDI, Cellini L. Helicobacter pylorifree-living and biofilm modes of growth: behavior in response to different culture media. APMIS 2012; 121:549-60. [DOI: 10.1111/apm.12020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 10/03/2012] [Indexed: 12/15/2022]
Affiliation(s)
- Lucinda J. Bessa
- Department of Biomedical Sciences; University ‘G. d'Annunzio’ - Chieti-Pescara; Italy
| | - Rossella Grande
- Department of Pharmacy; University ‘G. d'Annunzio’ - Chieti-Pescara; Italy
| | - Donato DI Iorio
- Department of Medical Oral Science and Biotechnology; University ‘G. d'Annunzio’ - Chieti-Pescara; Italy
| | - Mara DI Giulio
- Department of Pharmacy; University ‘G. d'Annunzio’ - Chieti-Pescara; Italy
| | - Emanuela DI Campli
- Department of Pharmacy; University ‘G. d'Annunzio’ - Chieti-Pescara; Italy
| | - Luigina Cellini
- Department of Pharmacy; University ‘G. d'Annunzio’ - Chieti-Pescara; Italy
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Giorgi G, Marcantonio P, Bersani F, Gavoçi E, Del Re B. Effect of extremely low frequency magnetic field exposure on DNA transposition in relation to frequency, wave shape and exposure time. Int J Radiat Biol 2011; 87:601-8. [PMID: 21504343 DOI: 10.3109/09553002.2011.570855] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To examine the effect of extremely low frequency magnetic field (ELF-MF) exposure on transposon (Tn) mobility in relation to the exposure time, the frequency and the wave shape of the field applied. MATERIALS AND METHODS Two Escherichia coli model systems were used: (1) Cells unable to express β-galactosidase (LacZ(-)), containing a mini-transposon Tn10 element able to give ability to express β-galactosidase (LacZ(+)) upon its transposition; therefore in these cells transposition activity can be evaluated by analysing LacZ(+) clones; (2) cells carrying Fertility plasmid (F(+)), and a Tn5 element located on the chromosome; therefore in these cells transposition activity can be estimated by a bacterial conjugation assay. Cells were exposed to sinusoidal (SiMF) or pulsed-square wave (PMF) magnetic fields of various frequencies (20, 50, 75 Hz) and for different exposure times (15 and 90 min). RESULTS Both mini-Tn10 and Tn5 transposition decreased under SiMF and increased under PMF, as compared to sham exposure control. No significant difference was found between frequencies and between exposure times. CONCLUSIONS ELF-MF exposure affects transposition activity and the effects critically depend on the wave shape of the field, but not on the frequency and the exposure time, at least in the range observed.
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Affiliation(s)
- Gianfranco Giorgi
- Department of Evolutionary Experimental Biology, University of Bologna, Bologna, Italy
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Belyaev I. Toxicity and SOS-response to ELF magnetic fields and nalidixic acid in E. coli cells. Mutat Res 2011; 722:56-61. [PMID: 21497670 DOI: 10.1016/j.mrgentox.2011.03.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Revised: 01/11/2011] [Accepted: 03/15/2011] [Indexed: 12/24/2022]
Abstract
Extremely low-frequency magnetic fields (ELF-MF) have previously been shown to affect conformation of chromatin and cell proliferation. Possible genotoxic and carcinogenic effects of ELF-MF have also been discussed and tested. In this study, we analysed the effect of ELF-MF on chromatin conformation in E. coli GE499 cells by the anomalous viscosity time-dependence (AVTD) technique. Possible genotoxic effects of the specific combination of static and ELF-MF, which has been proven to affect chromatin conformation, were investigated by a clonogenic assay, by assessing cell-growth kinetics, and by analysis of the SOS-response by means of inducible recA-lacZ fusion-gene products and the β-galactosidase assay. The genotoxic agent nalidixic acid (NAL) was used as a positive control and in combination with ELF-MF. Nalidixic acid at 3-30μg/ml decreased the AVTD peaks and induced a cytotoxic effect. In contrast to NAL, ELF-MF fields increased AVTD, stimulated cell growth, and increased cloning efficiency. These effects depended on the frequency within the range of 7-11Hz. While NAL induced an SOS-response, exposure to ELF-MF did not induce the recA-lacZ fusion-gene product. Exposure to ELF-MF did not modify the genotoxic effects of NAL either. All together, the data show that ELF-MF, under specific conditions of exposure, acted as a non-toxic but cell-growth stimulating agent.
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Affiliation(s)
- Igor Belyaev
- Laboratory of Molecular Genetics, Cancer Research Institute, Bratislava, Slovak Republic.
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