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Gurhan H, Barnes F. Impact of weak radiofrequency and static magnetic fields on key signaling molecules, intracellular pH, membrane potential, and cell growth in HT-1080 fibrosarcoma cells. Sci Rep 2023; 13:14223. [PMID: 37648766 PMCID: PMC10469173 DOI: 10.1038/s41598-023-41167-5] [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: 04/28/2023] [Accepted: 08/23/2023] [Indexed: 09/01/2023] Open
Abstract
There are substantial concerns that extended exposures to weak radiofrequency (RF) fields can lead to adverse health effects. In this study, HT-1080 fibrosarcoma cells were simultaneously exposed to a static magnetic flux density between 10 [Formula: see text] and 300 [Formula: see text] and RF magnetic fields with amplitudes ranging from 1 nT to 1.5 μT in the frequency range from 1.8 to 7.2 MHz for four days. Cell growth rates, intracellular pH, hydrogen peroxide, peroxynitrite, membrane potential and mitochondrial calcium were measured. Results were dependent on carrier frequency and the magnitude of the RF magnetic field, modulation frequencies and the background static magnetic field (SMF). Iron sulphur (Fe-S) clusters are essential for the generation of reactive oxygen species and reactive nitrogen species (ROS and RNS). We believe the observed changes are associated with hyperfine couplings between the chemically active electrons and nuclear spins. Controlling external magnetic fields may have important clinical implications on aging, cancer, arthritis, and Alzheimer's.
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Affiliation(s)
- Hakki Gurhan
- Department of Electrical, Computer and Energy Engineering, University of Colorado at Boulder, 425 UCB #1B55, Boulder, CO, 80309, USA.
| | - Frank Barnes
- Department of Electrical, Computer and Energy Engineering, University of Colorado at Boulder, 425 UCB #1B55, Boulder, CO, 80309, USA
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Ravaioli F, Bacalini MG, Giuliani C, Pellegrini C, D’Silva C, De Fanti S, Pirazzini C, Giorgi G, Del Re B. Evaluation of DNA Methylation Profiles of LINE-1, Alu and Ribosomal DNA Repeats in Human Cell Lines Exposed to Radiofrequency Radiation. Int J Mol Sci 2023; 24:9380. [PMID: 37298336 PMCID: PMC10253908 DOI: 10.3390/ijms24119380] [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: 04/24/2023] [Revised: 05/22/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
A large body of evidence indicates that environmental agents can induce alterations in DNA methylation (DNAm) profiles. Radiofrequency electromagnetic fields (RF-EMFs) are radiations emitted by everyday devices, which have been classified as "possibly carcinogenic"; however, their biological effects are unclear. As aberrant DNAm of genomic repetitive elements (REs) may promote genomic instability, here, we sought to determine whether exposure to RF-EMFs could affect DNAm of different classes of REs, such as long interspersed nuclear elements-1 (LINE-1), Alu short interspersed nuclear elements and ribosomal repeats. To this purpose, we analysed DNAm profiles of cervical cancer and neuroblastoma cell lines (HeLa, BE(2)C and SH-SY5Y) exposed to 900 MHz GSM-modulated RF-EMF through an Illumina-based targeted deep bisulfite sequencing approach. Our findings showed that radiofrequency exposure did not affect the DNAm of Alu elements in any of the cell lines analysed. Conversely, it influenced DNAm of LINE-1 and ribosomal repeats in terms of both average profiles and organisation of methylated and unmethylated CpG sites, in different ways in each of the three cell lines studied.
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Affiliation(s)
- Francesco Ravaioli
- IRCCS Istituto Delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy; (F.R.); (M.G.B.); (C.P.); (C.D.); (S.D.F.)
| | - Maria Giulia Bacalini
- IRCCS Istituto Delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy; (F.R.); (M.G.B.); (C.P.); (C.D.); (S.D.F.)
| | - Cristina Giuliani
- Laboratory of Molecular Anthropology and Centre for Genome Biology, Department of Biological, Geological and Environmental Sciences (BIGEA), University of Bologna, 40126 Bologna, Italy;
| | - Camilla Pellegrini
- IRCCS Istituto Delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy; (F.R.); (M.G.B.); (C.P.); (C.D.); (S.D.F.)
| | - Chiara D’Silva
- IRCCS Istituto Delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy; (F.R.); (M.G.B.); (C.P.); (C.D.); (S.D.F.)
| | - Sara De Fanti
- IRCCS Istituto Delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy; (F.R.); (M.G.B.); (C.P.); (C.D.); (S.D.F.)
| | - Chiara Pirazzini
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy;
| | - Gianfranco Giorgi
- Department of Pharmacy and Biotechnology (FABIT), University of Bologna, 40126 Bologna, Italy;
| | - Brunella Del Re
- Department of Pharmacy and Biotechnology (FABIT), University of Bologna, 40126 Bologna, Italy;
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Korol V, Husen P, Sjulstok E, Nielsen C, Friis I, Frederiksen A, Salo AB, Solov’yov IA. Introducing VIKING: A Novel Online Platform for Multiscale Modeling. ACS OMEGA 2020; 5:1254-1260. [PMID: 31984283 PMCID: PMC6977254 DOI: 10.1021/acsomega.9b03802] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 11/29/2019] [Indexed: 05/17/2023]
Abstract
Various biochemical and biophysical processes, occurring on multiple time and length scales, can nowadays be studied using specialized software packages on supercomputer clusters. The complexity of such simulations often requires application of different methods in a single study and strong computational expertise. We have developed VIKING, a convenient web platform for carrying out multiscale computations on supercomputers. VIKING allows combining methods in standardized workflows, making complex simulations accessible to a broader biochemical and biophysical society.
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Affiliation(s)
- Vasili Korol
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
| | - Peter Husen
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
| | - Emil Sjulstok
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
- Neuroscience, University of Texas Southwestern Medical Center at
Dallas, Dallas 75390, Texas, United States
| | - Claus Nielsen
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
| | - Ida Friis
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
| | - Anders Frederiksen
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
| | - Adrian B. Salo
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
| | - Ilia A. Solov’yov
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Odense 5230, Denmark
- Department
of Physics, Carl von Ossietzky Universität
Oldenburg, Oldenburg 26111, Germany
- E-mail:
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Nielsen C, Solov’yov IA. MolSpin—Flexible and extensible general spin dynamics software. J Chem Phys 2019; 151:194105. [DOI: 10.1063/1.5125043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Claus Nielsen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Ilia A. Solov’yov
- Department of Physics, Carl von Ossietzky Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26129 Oldenburg, Germany
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Husen P, Nielsen C, Martino CF, Solov'yov IA. Molecular Oxygen Binding in the Mitochondrial Electron Transfer Flavoprotein. J Chem Inf Model 2019; 59:4868-4879. [PMID: 31665600 DOI: 10.1021/acs.jcim.9b00702] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Reactive oxygen species such as superoxide are potentially harmful byproducts of the aerobic metabolism in the inner mitochondrial membrane, and complexes I, II, III of the electron transport chain have been identified as primary sources. The mitochondrial fatty acid b-oxidation pathway may also play a yet uncharacterized role in reactive oxygen species generation, apparently at the level of the electron transfer flavoprotein:ubiquinone oxidoreductase (ETF:QO) and/or its redox partner electron-transfer flavoprotein (ETF). These enzymes comprise a key pathway through which electrons are sequentially shuttled from several dehydrogenases to the respiratory chain. The exact mechanisms of superoxide production have not been fully established, but a crucial starting point would be the binding of molecular oxygen within one of the protein complexes. The present investigation offers a comprehensive computational approach for the determination of binding modes and characteristic binding times of small molecules inside proteins, which is then used to reveal several O2 binding sites near the flavin adenine dinucleotide cofactor of the ETF enzyme. The binding sites are further characterized to extract the necessary parameters for further studies of possible electron transfer between flavin and O2 leading to radical pair formation and possible superoxide production.
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Affiliation(s)
- Peter Husen
- Department of Physics, Chemistry and Pharmacy , University of Southern Denmark , Odense , Denmark
| | - Claus Nielsen
- Department of Physics, Chemistry and Pharmacy , University of Southern Denmark , Odense , Denmark
| | - Carlos F Martino
- Biomedical and Chemical Engineering and Science Department , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Ilia A Solov'yov
- Department of Physics , Carl von Ossietzky Universität Oldenburg , Oldenburg , Germany
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